WO2002000457A1 - Single steady bearing tension strut for mcpherson suspension - Google Patents

Single steady bearing tension strut for mcpherson suspension Download PDF

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Publication number
WO2002000457A1
WO2002000457A1 PCT/FR2001/001778 FR0101778W WO0200457A1 WO 2002000457 A1 WO2002000457 A1 WO 2002000457A1 FR 0101778 W FR0101778 W FR 0101778W WO 0200457 A1 WO0200457 A1 WO 0200457A1
Authority
WO
WIPO (PCT)
Prior art keywords
suspension
strut
slide
axis
type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FR2001/001778
Other languages
French (fr)
Inventor
André Braud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alpine Racing SAS
Original Assignee
Renault Sport SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault Sport SAS filed Critical Renault Sport SAS
Publication of WO2002000457A1 publication Critical patent/WO2002000457A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/001—Arrangements for attachment of dampers
    • B60G13/003—Arrangements for attachment of dampers characterised by the mounting on the vehicle body or chassis of the damper unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00—Resilient suspensions for a single wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/121—Attachments or mountings adjustable, e.g. to modify spring characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/366—Special sealings, including sealings or guides for piston-rods functioning as guide only, e.g. bushings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/54—Arrangements for attachment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312—The spring being a wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/416—Ball or spherical joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/423—Rails, tubes, or the like, for guiding the movement of suspension elements
    • B60G2204/4232—Sliding mounts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/10—Arrangements for locking
    • F16C11/103—Arrangements for locking frictionally clamped
    • F16C11/106—Arrangements for locking frictionally clamped for ball joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/045—Ball or roller bearings having rolling elements journaled in one of the moving parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/03—Shafts; Axles telescopic
    • F16C3/035—Shafts; Axles telescopic with built-in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke

Definitions

  • the invention relates to a strut of a suspension device of a motor vehicle.
  • the invention relates more particularly to a strut of a suspension device of a motor vehicle, in particular for a MacPherson type suspension, of the type comprising a. lower element, or slide, which is mounted on the hub support of a wheel by its lower end and which comprises an upper section of substantially cylindrical shape, and an upper element which is articulated on the body, or the chassis, of the vehicle, of the type in which the lower slide is slidably mounted with respect to the upper element, along a geometric suspension axis, and of the type in which a shock absorber and an elastic suspension element are interposed axially between the lower slide and the 'top element.
  • Conventional struts are generally of the floating bearing type or of the type with two fixed bearings. There is shown diagrammatically in FIG. 1 a conventional embodiment of a strut 10 of the floating bearing type.
  • the strut 10 here comprises a lower slide 12 which is fixed to the hub support 14 of a wheel 16.
  • the hub support 14 is articulated on a suspension arm 18 which is itself articulated on the chassis 20 of the vehicle.
  • the lower slide 12 delimits, in its upper cylindrical section, a working chamber 22 for the piston 24 of the shock absorber 26.
  • the head 28 of the piston 24 is carried by the lower axial end of a rod 30 which is articulated, by its upper axial end, on the body 20, or the chassis, of the vehicle.
  • the slide 12 is capable of sliding, along a geometric axis of suspension AA, along the piston rod 30.
  • the slide 12 has at its upper axial end an upper flange 32 which slides along the piston rod 30.
  • This upper flange 32 forms a first bearing, or fixed bearing, for guiding in axial sliding.
  • the piston head 28 forms the second bearing, or floating bearing, for guiding in axial sliding.
  • the piston rod 30 is carried by the lower scissor neck 12 and an upper tubular piece 34, which is articulated on the body 20 of the vehicle, delimits at its lower section the working chamber 22 of the shock absorber 26.
  • the lower slide 12 has at its upper section a tubular part 36 which slides, by the upper flange 32 situated at its upper axial end, on the upper tubular part 34.
  • the first guide bearing or fixed bearing
  • the second guide bearing or floating bearing
  • the lower collar 38 which is located at the end lower axial of the upper tubular part 34 and which extends towards the outside, so as to be in frictional contact with the internal wall of the sliding tubular part 36.
  • this type of strut 10 is complex and expensive, since two independent and coaxial guide surfaces have to be produced, one being the inner wall of the working chamber 22, or of the sliding tubular part 36, and the the other being the piston rod 30, respectively the lower flange 38 of the sliding tubular part 36.
  • FIG. 3 schematically shows a conventional embodiment of a strut 10 of the type with two fixed bearings.
  • the strut 10 is here similar to that of the conventional embodiment of the strut 10 of the floating bearing type with the difference that the piston head 28 no longer plays the role of guide bearing.
  • the second guide bearing is fixed and it is formed by an intermediate flange 40, inside the working chamber 22, which slides along the piston rod 30.
  • this assembly has a low rigidity and the intensity of the friction produced is very high, which causes a limited resistance to wear.
  • the first bearing is formed by the upper flange 32 of the sliding tubular part 36 and the second bearing, which is fixed, is formed by an intermediate flange 40 situated inside the sliding tubular part 36, which slides on the upper tubular part 34.
  • the piston rod 30 is carried by the lower slide 36.
  • This embodiment only partially solves the problems of rigidity, friction and wear mentioned above.
  • the invention aims to ' remedy these drawbacks.
  • the invention provides a strut of the type described above, characterized in that the upper element is a guide bearing in axial sliding which internally receives the upper section of the lower slide.
  • the strut according to the invention makes it possible to almost completely eliminate sliding friction, while improving the guiding, and therefore the rigidity.
  • the invention eliminates the shearing forces which were exerted on the piston rod in the case of known conventional embodiments.
  • the strut according to the invention also makes it possible to reduce the unsprung masses of the vehicle.
  • the damper comprises a piston whose head is fixed to the end of a rod and which is capable of sliding axially, along a geometric damping axis substantially parallel to the suspension axis, in a working chamber of substantially tubular shape containing a damping fluid, and the piston rod is integral with the guide bearing, or the lower slide, and the tubular working chamber is integral with the lower slide, respectively the guide bearing;
  • the working chamber of the shock absorber is formed in the upper section of the lower slide and the piston rod is fixed to the guide bearing, so that the damping axis is substantially coincident with the suspension axis;
  • the lower section of the slide comprises a housing for a reservoir of damping fluid which is capable of communicating with the working chamber by a conduit;
  • the damping axis is distinct from the suspension axis
  • the elastic suspension element is a spring of the helical type which is coaxial with the suspension axis;
  • the suspension spring is in lower axial support on a lower cup secured to the slide, and it is in upper axial support on an upper cup secured to the guide bearing; -
  • a guide sleeve, for example of the ball type, is interposed radially between the guide bearing and the upper section of the slide.
  • FIG. 1 is a schematic view in axial section which shows the conventional embodiment of a strut of the floating bearing type;
  • - Fig u re 2 is a view similar to the previous one which shows the improved embodiment of a strut of the floating bearing type;
  • FIG. 3 is a view similar to the previous which shows the conventional embodiment of a strut of the type with two fixed bearings;
  • - Figure 4 is a view similar to the previous which shows the improved embodiment of a strut of the type with two fixed bearings
  • - Figure 5 is a view similar to the preceding which illustrates the forces which apply to the strut of the type with two fixed bearings of Figure 3;
  • FIG. 6 is a view similar to the previous which shows a first embodiment of a strut according to the teachings of the invention
  • FIG. 7 is a view similar to the previous which shows a second embodiment of a strut according to the teachings of the invention
  • - Figure 8 is a sectional view which shows in detail the first embodiment of a strut according to the teachings of the invention
  • FIG. 9 is a view similar to the previous one which represents a simplified variant of the embodiment of FIG. 8.
  • FIG. 5 which represents a conventional embodiment of a strut 10 of the type with two fixed bearings, a geometric axis of sliding of the strut 10 is defined which is called suspension axis A-A.
  • the hinge point Pc of the piston rod 30 on the body 20 of the vehicle has been transferred to the suspension axis AA, the fulcrum P1 of the first fixed bearing 32 on the piston rod 30, the fulcrum P2 of the second fixed bearing 40 on the piston rod 30, the articulation point Pm of the hub support 14 on the suspension arm 18.
  • the torque M causes a reaction force R1 at the first fixed bearing 32 and a reaction force R2 at the second fixed bearing 40 which are in opposite directions.
  • the strut 10 has a lower element, or slide 12, which is fixed to the hub support 14 of a wheel by its lower end and which has a substantially cylindrical upper section delimiting the working chamber 22 of a damper 26.
  • the strut 10 also comprises an upper element 42 of generally tubular shape which is articulated on the body 20 of the vehicle and which is a guide bearing in axial sliding, along the geometrical axis of suspension AA, for the slider 12 .
  • the damper 26 comprises a piston 24, the head 28 of which is fixed to the lower axial end of a rod 30.
  • the piston rod 30 enters the working chamber 22 by an upper flange of the slide 12.
  • the upper axial end of the piston rod 30 is fixed to the upper transverse face 44 of the guide bearing 42.
  • FIG. 7 represents the principle diagram of a second embodiment of the invention in which the damping axis B-B is substantially parallel to the axis of suspension A-A and it is associated therewith.
  • the working chamber 22 of the damper 26 and the piston rod 30 are arranged substantially parallel to the slide 12.
  • the working chamber 22 of the shock absorber 26 is formed in a substantially cylindrical shock absorber body 46 which is fixed to the slide 12.
  • the piston 24 is fixed to the guide bearing 42 by the upper axial end of its rod 30.
  • the piston rod 30 can be fixed to the slide 12 and the body of the shock absorber 46 can be fixed to the guide bearing 42.
  • FIG. 8 a portion of the body 20 of the vehicle is shown which carries, by articulation, by means of a ball joint 48, the upper element of the strut 1 0, or guide bearing 42.
  • the ball 48 comprises an outer support ring 50 which is fixed to the body 20 and an inner ring 52, or ball of ball, which is retained in the outer ring 50 by a retaining washer 54.
  • the guide bearing 42 includes a guide tube 56 which is mounted in the ball joint 52 and which extends axially upwards and downwards with respect to the ball joint 52.
  • the guide tube 56 is closed at its upper axial end by an upper plug 58.
  • the 10 comprises a generally cylindrical lower body 60 which delimits, in its upper section 62, the base of the working chamber 22 of a damper 26 and, in its lower section 64, a cylindrical tank 66.
  • the lower cylindrical body 60 is mounted here in a complementary cylindrical housing 68 of the hub support 14.
  • the hub support 14 being of known type, it is shown here partially.
  • the cylindrical reservoir 66 is designed to contain a damping fluid (not shown) and it communicates with the working chamber 22 of the damper 26, also containing the damping fluid, by a conduit 70 capable of being closed. by a known device (not shown) such as a valve.
  • a cartridge tube 72 of cylindrical shape is fitted inside the upper section 62 of the lower cylindrical body 60 and it delimits the upper section of the working chamber 22.
  • a guide sleeve 74 here of the ball type, is mounted within the guide tube 56, substantially at the height of the ball 'patella 52 so as to be interposed radially between the guide tube 56 and the cartridge tube 72 of the damper 26 in order to facilitate its axial sliding along the axis of suspension AA.
  • a piston rod 30 is mounted by its upper axial end in the lower transverse face 76 of the upper plug 58 so that the lower axial end section of the piston rod 30 extends inside the working chamber. 22.
  • the lower axial end of the rod 30 comprises a piston head 28 of external diameter substantially equal to the internal diameter of the cartridge tube 72 and which delimits, in the working chamber 22, an upper volume Vs and a lower volume Vi of variable dimensions.
  • the piston head 28 has calibrated axial orifices (not shown) which make the upper volume Vs and the lower volume Vi of the working chamber 22 communicate, so that the damping fluid can flow from volume to volume. the other as a function of the displacement of the slide 12 relative to the piston 24.
  • the axial orifices are fitted with valves.
  • a first group G1 of axial orifices comprises valves which oppose the circulation of the fluid towards the lower volume Vi and a second group G2 of axial orifices comprises valves which oppose the circulation of the fluid towards the volume higher Vs.
  • the cartridge tube 72 has at its upper axial end an annular cartridge cap 78.
  • a sealing ring 80 which is for example provided with O-rings, is interposed between the cartridge stopper 78 and the piston rod 30.
  • An upper elastic stop 82 is mounted on the piston rod 30 so as to be interposed axially between the cartridge stopper 78 and the upper stopper 58, when the slide 12 is in its upper stop position.
  • the upper plug 58 is adjustable in height, which makes it possible to adjust the height of the upper stop position.
  • An intermediate elastic stop 84 is mounted on the piston rod 30 so as to be interposed axially between the cartridge stopper 78 and the piston head 28, when the slide 12 is in its lower stop position.
  • an upper cup 86 which is here adjustable in height, is mounted on the lower section of the guide tube 56 so as to form an upper axial bearing surface for a suspension spring 88 of the helical type.
  • the lower cylindrical body 60 delimits a lower cup 90 on its outer axial wall, here at the level of the lower axial end of the working chamber 22, so as to form a lower axial bearing surface for the suspension spring 88.
  • the suspension spring 88 is therefore mounted on the strut 10, coaxial with the suspension axis A-A, between the upper cup 86 and the lower cup 90.
  • the shock absorber 26 slows the movement of the slide 12 downwards.
  • the damping fluid circulates here from the upper volume Vs to the lower volume Vi of the working chamber 22, through the axial orifices of the first group G 1.
  • the axial orifices of the first group G1 are of diameters smaller than the axial orifices of the second group G2, so that the damping produced by the rolling of the fluid through the axial orifices of the first group G1 is greater than the damping produced by the rolling of the fluid through the axial orifices of the second group G2.
  • the strut 10 can pivot slightly around an axis substantially perpendicular to the axis of suspension AA at the center of the ball joint 48 .
  • FIG. 9 shows a simplified variant of the embodiment of FIG. 7.
  • the strut 10 no longer includes an adjustable upper cup 86, the upper axial support function for the suspension spring 88 being fulfilled by a shoulder 92 which is produced in the lower section of the inner ring 52 of the ball 48.
  • guide tube 56 is made in one piece with the inner ring 52 of the ball joint 48 and it extends only upwards of the inner ring 52.
  • the guide tube 56 does not have a plug but it is closed at its upper axial end so that the piston rod 30 is fixed directly in the upper transverse face 94 of the guide tube 56.
  • the operation of this variant of the invention is substantially similar to that of the embodiment described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention concerns a tension strut (10) for a McPherson suspension, comprising a lower element (12), or slide, which is mounted on a wheel hub support (14) by its lower end and which includes a substantially cylindrical upper section (72), and an upper element (42) mounted articulated on the body (20), or the chassis, of the vehicle, wherein the lower slide (12) is mounted sliding relative to the upper element (42) along a geometrical suspension axis (A-A), and wherein a shock absorber (26) and an elastic suspension element (8) are axially (A-A) interposed between the lower slide (12) and the upper element (42). The invention is characterised in that the upper element (42) is an axially sliding (A-A) steady bearing receiving internally the upper section (72) of the lower slide (12).

Description

"Jambe de force à un seul palier de guidage pour une suspension du type MacPherson" "Strut with a single guide bearing for MacPherson type suspension"

L' invention concerne une jambe de force d' un dispositif de suspension d' un véhicule automobile. L'invention concerne plus particulièrement une jambe de force d' un dispositif de suspension d' un véhicule automobile, notamment pour une suspension du type MacPherson , du type comportant un . élément inférieur, ou coulisseau, qui est monté sur le support de moyeu d'une roue par son extrémité inférieure et qui comporte un tronçon supérieur de forme sensiblement cylindrique, et un élément supérieur qui est monté à articulation sur la caisse, ou le châssis, du véhicule, du type dans lequel le coulisseau inférieur est monté coulissant par rapport à l'élément supérieur, suivant un axe géométrique de suspension, et du type dans lequel un amortisseur et un élément élastique de suspension sont interposés axialement entre le coulisseau inférieur et l'élément supérieur.The invention relates to a strut of a suspension device of a motor vehicle. The invention relates more particularly to a strut of a suspension device of a motor vehicle, in particular for a MacPherson type suspension, of the type comprising a. lower element, or slide, which is mounted on the hub support of a wheel by its lower end and which comprises an upper section of substantially cylindrical shape, and an upper element which is articulated on the body, or the chassis, of the vehicle, of the type in which the lower slide is slidably mounted with respect to the upper element, along a geometric suspension axis, and of the type in which a shock absorber and an elastic suspension element are interposed axially between the lower slide and the 'top element.

Les jambes de force classiques sont généralement du type à palier flottant ou du type à deux paliers fixes. On a représenté schématiquement à la figure 1 un mode de réalisation classique d' une jambe de force 10 du type à palier flottant.Conventional struts are generally of the floating bearing type or of the type with two fixed bearings. There is shown diagrammatically in FIG. 1 a conventional embodiment of a strut 10 of the floating bearing type.

La jambe de force 10 comporte ici un coulisseau inférieur 12 qui est fixé au support de moyeu 14 d' une roue 16. Le support de moyeu 14 est monté à articulation sur un bras de suspension 18 qui est lui-même monté à articulation sur le châssis 20 du véhicule.The strut 10 here comprises a lower slide 12 which is fixed to the hub support 14 of a wheel 16. The hub support 14 is articulated on a suspension arm 18 which is itself articulated on the chassis 20 of the vehicle.

Le coulisseau inférieur 12 délimite, dans son tronçon cylindrique supérieur, une chambre de travail 22 pour le piston 24 de l'amortisseur 26.The lower slide 12 delimits, in its upper cylindrical section, a working chamber 22 for the piston 24 of the shock absorber 26.

La tête 28 du piston 24 est portée par l'extrémité axiale infé rieure d' une tige 30 qui est montée à articulation, par son extrémité axiale supérieure, sur la caisse 20, ou le châssis, du véhicule. Le coulisseau 12 est susceptible de coulisser, selon un axe géométrique de suspension A-A, le long de la tige 30 de piston .The head 28 of the piston 24 is carried by the lower axial end of a rod 30 which is articulated, by its upper axial end, on the body 20, or the chassis, of the vehicle. The slide 12 is capable of sliding, along a geometric axis of suspension AA, along the piston rod 30.

Le coulisseau 12 comporte à son extrémité axiale supérieure une collerette supérieure 32 qui coulisse le long de la tige de piston 30.The slide 12 has at its upper axial end an upper flange 32 which slides along the piston rod 30.

Cette coUerette supérieure 32 forme un premier palier, ou palier fixe, de guidage en coulissement axial.This upper flange 32 forms a first bearing, or fixed bearing, for guiding in axial sliding.

La tête de piston 28 forme le deuxième palier, ou palier flottant, de g uidage en coulissement axial. Un mode de réalisation amélioré de ce type de jambe de force 10, qui est représenté schématiquement à la figure 2, permet de soulager l'effort qui s'applique sur la tige de piston 30.The piston head 28 forms the second bearing, or floating bearing, for guiding in axial sliding. An improved embodiment of this type of strut 10, which is shown diagrammatically in FIG. 2, makes it possible to relieve the force which is applied to the piston rod 30.

Selon ce mode de réalisation la tige de piston 30 est portée par le cou lisseau inférieur 12 et une pièce tubulaire supérieure 34, qui est montée à articulation sur la caisse 20 du véhicule, délimite à son tronçon inférieur la chambre de travail 22 de l'amortisseur 26.According to this embodiment, the piston rod 30 is carried by the lower scissor neck 12 and an upper tubular piece 34, which is articulated on the body 20 of the vehicle, delimits at its lower section the working chamber 22 of the shock absorber 26.

On note que le coulisseau inférieur 12 comporte à son tronçon supérieur une pièce tubulaire 36 qui coulisse, par la collerette supérieure 32 située à son extrémité axiale supérieure, sur la pièce tubulaire supérieure 34.It will be noted that the lower slide 12 has at its upper section a tubular part 36 which slides, by the upper flange 32 situated at its upper axial end, on the upper tubular part 34.

Le premier palier, ou palier fixe, de guidage est formé ici par la collerette supérieure 32 de la pièce tubulaire coulissante 36. Le deuxième palier, ou palier flottant, de guidage est formé ici par la collerette inférieure 38 qui est située à l' extrémité axiale inférieure de la pièce tubulaire supérieure 34 et qui s'étend vers l'extérieur, de manière à être en contact de frottement avec la paroi interne de la pièce tubulaire coulissante 36. Quel que soit le .mode de réalisation selon l'état de la technique, classique ou amélioré, lorsque l' on applique un effort dirigé vers le haut sur le support de moyeu 14, le coulisseau 12 se déplace vers le haut ce qui augmente la distance entre les deux paliers de guidage, améliorant ainsi le guidage. Cependant, ce type de jambe de force 10 est complexe et coûteux, car il faut réaliser deux surfaces de guidage indépendantes et coaxiaies, l' une étant la paroi intérieure de la chambre de travail 22, ou de la pièce tubulaire coulissante 36, et l'autre étant la tige de piston 30, respectivement la collerette inférieure 38 de la pièce tubulaire coulissante 36.The first guide bearing, or fixed bearing, is formed here by the upper collar 32 of the sliding tubular part 36. The second guide bearing, or floating bearing, is formed here by the lower collar 38 which is located at the end lower axial of the upper tubular part 34 and which extends towards the outside, so as to be in frictional contact with the internal wall of the sliding tubular part 36. Whatever the embodiment according to the state of the technique, conventional or improved, when an upward force is applied to the hub support 14, the slider 12 moves upwards which increases the distance between the two guide bearings, thereby improving the guidance. However, this type of strut 10 is complex and expensive, since two independent and coaxial guide surfaces have to be produced, one being the inner wall of the working chamber 22, or of the sliding tubular part 36, and the the other being the piston rod 30, respectively the lower flange 38 of the sliding tubular part 36.

On a représenté schématiquement à la figure 3 un mode de réalisation classique d' une jambe de force 10 du type à deux paliers fixes. La jambe de force 10 est ici similaire à celle du mode de réalisation classique de la jambe de force 10 du type à palier flottant à la différence que la tête de piston 28 ne joue plus le rôle de palier de guidage.FIG. 3 schematically shows a conventional embodiment of a strut 10 of the type with two fixed bearings. The strut 10 is here similar to that of the conventional embodiment of the strut 10 of the floating bearing type with the difference that the piston head 28 no longer plays the role of guide bearing.

Le deuxième palier de guidage est fixe et il est formé par une collerette intermédiaire 40, à l' intérieur de la chambre de travail 22, qui coulisse le long de la tige 30 de piston.The second guide bearing is fixed and it is formed by an intermediate flange 40, inside the working chamber 22, which slides along the piston rod 30.

Dans ce type de jambe de force 10, la distance entre les deux paliers fixes 32, 40 est très faible et constante sous effort.In this type of strut 10, the distance between the two fixed bearings 32, 40 is very small and constant under stress.

On constate que la flexion de la tige 30 de piston modifie la qualité des contacts sur les paliers fixes 32, 40.It can be seen that the bending of the piston rod 30 modifies the quality of the contacts on the fixed bearings 32, 40.

Par conséquent, ce montage présente une rigidité faible et l' intensité des frottements produits est très élevée, ce qui provoque une résistance à l' usure limitée.Consequently, this assembly has a low rigidity and the intensity of the friction produced is very high, which causes a limited resistance to wear.

Comme pour la jambe de force 10 du type à palier flottant, on connaît un mode de réalisation amélioré de la jambe de force 10 du type à deux paliers fixes, qui est représenté schématiquement à la figure 4 et qui permet de soulager l'effort qui s'applique sur la tige 30 de piston.As for the strut 10 of the floating bearing type, an improved embodiment of the strut 10 of the type with two fixed bearings is known, which is shown diagrammatically in FIG. 4 and which makes it possible to relieve the effort which applies to the piston rod 30.

Selon ce mode de réalisation le premier palier est formé par la collerette supérieure 32 de la pièce tubulaire coulissante 36 et le deuxième palier, qui est fixe, est formé par une collerette intermédiaire 40 située à l' intérieur de la pièce tubulaire coulissante 36, qui coulisse sur la pièce tubulaire supérieure 34. La tige 30 de piston est portée par le coulisseau inférieur 36.According to this embodiment, the first bearing is formed by the upper flange 32 of the sliding tubular part 36 and the second bearing, which is fixed, is formed by an intermediate flange 40 situated inside the sliding tubular part 36, which slides on the upper tubular part 34. The piston rod 30 is carried by the lower slide 36.

Ce mode de réalisation ne permet de résoudre qu' en partie les problèmes de rigidité, de frottements et d' usure évoqués ci- dessus.This embodiment only partially solves the problems of rigidity, friction and wear mentioned above.

L'invention vise à' remédier à ces inconvénients.The invention aims to ' remedy these drawbacks.

Dans ce but, l' invention propose une jambe de force du type décrit précédemment, caractérisée en ce que l' élément supérieur est un palier de guidage en coulissement axial qui reçoit intérieurement le tronçon supérieur du coulisseau inférieur.To this end, the invention provides a strut of the type described above, characterized in that the upper element is a guide bearing in axial sliding which internally receives the upper section of the lower slide.

La jambe de force selon l' invention permet de supprimer presque totalement les frottements de coulissement, tout en améliorant le guidage, et donc la rigidité.The strut according to the invention makes it possible to almost completely eliminate sliding friction, while improving the guiding, and therefore the rigidity.

De plus, l' invention élimine les efforts tranchants qui s' exerçaient au niveau de la tige de piston dans le cas des modes de réalisation classiques connus.In addition, the invention eliminates the shearing forces which were exerted on the piston rod in the case of known conventional embodiments.

L'absence d'efforts tranchants permet notamment un meilleur fonctionnement de l' hydraulique.The absence of sharp forces allows in particular a better functioning of the hydraulics.

La jambe de force selon l' invention permet aussi de diminuer les masses non suspendues du véhicule.The strut according to the invention also makes it possible to reduce the unsprung masses of the vehicle.

On expliquera dans la description qui va suivre ce qui permet à la jambe de force selon l' invention de procurer de tels avantages.It will be explained in the description which follows which allows the strut according to the invention to provide such advantages.

Selon d'autres caractéristiques de l' invention : - l' amortisseur comporte un piston dont la tête est fixée à l' extrémité d' une tige et qui est susceptible de coulisser axialement, suivant un axe géométrique d' amortissement sensiblement parallèle à l' axe de suspension, dans une chambre de travail de forme sensiblement tubulaire contenant un fluide d' amortissement, et la tige de piston est solidaire du palier de guidage, ou du coulisseau inférieur, et la chambre de travail tubulaire est solidaire du coulisseau inférieur, respectivement du palier de guidage ; - la chambre de travail de l'amortisseur est formée dans le tronçon supérieur du coulisseau inférieur et la tige de piston est fixée au palier de guidage, de manière que l' axe d'amortissement soit sensiblement confondu avec l'axe de suspension ; - le tronçon inférieur du coulisseau comporte un logement pour un réservoir de fluide d'amortissement qui est susceptible de communiquer avec la chambre de travail par un conduit ;According to other characteristics of the invention: - the damper comprises a piston whose head is fixed to the end of a rod and which is capable of sliding axially, along a geometric damping axis substantially parallel to the suspension axis, in a working chamber of substantially tubular shape containing a damping fluid, and the piston rod is integral with the guide bearing, or the lower slide, and the tubular working chamber is integral with the lower slide, respectively the guide bearing; - The working chamber of the shock absorber is formed in the upper section of the lower slide and the piston rod is fixed to the guide bearing, so that the damping axis is substantially coincident with the suspension axis; - The lower section of the slide comprises a housing for a reservoir of damping fluid which is capable of communicating with the working chamber by a conduit;

-l' axe d'amortissement est distinct de l' axe de suspension ;-the damping axis is distinct from the suspension axis;

- l' élément élastique de suspension, est un ressort du type hélicoïdal qui est coaxial à l'axe de suspension ;- The elastic suspension element is a spring of the helical type which is coaxial with the suspension axis;

- le ressort de suspension est en appui axial inférieur sur une coupelle inférieure solidaire du coulisseau, et il est en appui axial supérieur sur une coupelle supérieure solidaire du palier de guidage ; - une douille de guidage, par exemple du type à billes, est interposée radialement entre le palier de guidage et le tronçon supérieur du coulisseau.- The suspension spring is in lower axial support on a lower cup secured to the slide, and it is in upper axial support on an upper cup secured to the guide bearing; - A guide sleeve, for example of the ball type, is interposed radially between the guide bearing and the upper section of the slide.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:

- la figure 1 est une vue schématique en coupe axiale qui rep résente le mode de réalisation classique d' une jambe de force du type à palier flottant ; - la fig u re 2 est une vue similaire à la précédente qui représente le mode de réalisation amélioré d' une jambe de force du type à palier flottant ;- Figure 1 is a schematic view in axial section which shows the conventional embodiment of a strut of the floating bearing type; - Fig u re 2 is a view similar to the previous one which shows the improved embodiment of a strut of the floating bearing type;

- la figure 3 est une vue similaire aux précédentes qui représente le mode de réalisation classique d'une jambe de force du type à deux paliers fixes ;- Figure 3 is a view similar to the previous which shows the conventional embodiment of a strut of the type with two fixed bearings;

- la figure 4 est une vue similaire aux précédentes qui représente le mode de réalisation amélioré d' une jambe de force du type à deux paliers fixes ; - la figure 5 est une vue similaire aux précédentes qui illustre les efforts qui s'appliquent sur la jambe de force du type à deux paliers fixes de la figure 3 ;- Figure 4 is a view similar to the previous which shows the improved embodiment of a strut of the type with two fixed bearings; - Figure 5 is a view similar to the preceding which illustrates the forces which apply to the strut of the type with two fixed bearings of Figure 3;

- la figure 6 est une vue similaire aux précédentes qui représente un premier mode de réalisation d' une jambe de force selon les enseignements de l' invention ;- Figure 6 is a view similar to the previous which shows a first embodiment of a strut according to the teachings of the invention;

- la figure 7 est une vue similaire aux précédentes qui représente un second mode de réalisation d' une jambe de force selon les enseignements de l' invention ; - la figure 8 est une vue en coupe qui représente en détail le premier mode de réalisation d' une jambe de force selon les enseignements de l'invention ;- Figure 7 is a view similar to the previous which shows a second embodiment of a strut according to the teachings of the invention; - Figure 8 is a sectional view which shows in detail the first embodiment of a strut according to the teachings of the invention;

- la figure 9 est une vue similaire à la précédente qui représente une variante simplifiée du mode de réalisation de la figure 8.FIG. 9 is a view similar to the previous one which represents a simplified variant of the embodiment of FIG. 8.

Dans la description qui va suivre on définira arbitrairement une orientation de haut en bas conforme à l' orientation des figures.In the description which follows, an orientation from top to bottom will arbitrarily be defined in accordance with the orientation of the figures.

Des éléments identiques ou similaires porteront des références identiques.Identical or similar elements will bear identical references.

Les figures 1 à 4 ont été décrites précédemment dans ie cadre de la présentation de l'état de la technique.Figures 1 to 4 have been described previously in the context of the presentation of the state of the art.

On note que, pour simplifier les schémas, on n' a pas représenté de ressort de suspension sur les figures 1 à 7. Dans un premier temps on expliquera comment on a résolu les problèmes posés par les jambes de force de l'état de la technique grâce à la jambe de force selon l'invention.Note that, to simplify the diagrams, a suspension spring has not been shown in FIGS. 1 to 7. Firstly, we will explain how we have solved the problems posed by the struts of the state of the technique thanks to the strut according to the invention.

Sur la figure 5, qui représente un mode de réalisation classique d' une jambe de force 10 du type à deux paliers fixes, on définit un axe géométrique de coulissement de la- jambe de force 10 qui est appelé axe de suspension A-A.In FIG. 5, which represents a conventional embodiment of a strut 10 of the type with two fixed bearings, a geometric axis of sliding of the strut 10 is defined which is called suspension axis A-A.

Par approximation, on a reporté sur l' axe de suspension A-A le point d' articulation Pc de la tige 30 de piston sur la caisse 20 du véhicule, le point d'appui P1 du premier palier fixe 32 sur la tige 30 de piston , le point d'appui P2 du deuxième palier fixe 40 sur la tige 30 de piston , le point d'articulation Pm du support de moyeu 14 sur le bras de suspension 18.By approximation, the hinge point Pc of the piston rod 30 on the body 20 of the vehicle has been transferred to the suspension axis AA, the fulcrum P1 of the first fixed bearing 32 on the piston rod 30, the fulcrum P2 of the second fixed bearing 40 on the piston rod 30, the articulation point Pm of the hub support 14 on the suspension arm 18.

Lorsque la jambe de force 10 travaille, il s' exerce un couple M au point Pm qui tend par exemple à déplacer le point Pm vers la gauche et vers le haut.When the strut 10 is working, there is a torque M at the point Pm which tends for example to move the point Pm to the left and upwards.

Le couple M provoque une force de réaction R1 au premier palier fixe 32 et une force de réaction R2 au deuxième palier fixe 40 qui sont de sens opposés. On constate qu'en diminuant la distance entre les pointsThe torque M causes a reaction force R1 at the first fixed bearing 32 and a reaction force R2 at the second fixed bearing 40 which are in opposite directions. We can see that by reducing the distance between the points

P1 et Pc, c'est à dire entre le premier palier fixe 32 et le point d' articulation Pc de la tige 30 de piston sur la caisse 20 du véhicule, la réaction R1 au premier palier fixe 32 et la réaction R2 au deuxième palier fixe 40 diminuent, de même que l'intensité des frottements au niveau des paliers 32, 40.P1 and Pc, that is to say between the first fixed bearing 32 and the articulation point Pc of the piston rod 30 on the body of the vehicle, the reaction R1 at the first fixed bearing 32 and the reaction R2 at the second bearing fixed 40 decrease, as does the intensity of friction at the bearings 32, 40.

Si l'on rapproche le point P1 d u point Pc jusqu' à ce qu' ils soient sensiblement confondus, on constate que la réaction R2 au deuxième palier fixe 40 est sensiblement nulle.If the point P1 is brought closer to the point Pc until they are substantially combined, it can be seen that the reaction R2 at the second fixed bearing 40 is substantially zero.

Par conséquent, dans cette configuration il est possible de supprimer le deuxième palier fixe 40.Consequently, in this configuration, it is possible to eliminate the second fixed bearing 40.

Lorsque la jambe de force 10 est en mouvement, le coulisseau 12 se déplace, suivant l'axe de suspension A-A, par rapport à la tige 30 de piston, donc le point P1 se déplace par rapport au point Pc. Afin d'éviter le déplacement du point P1 et afin de conserver de la course pour le déplacement du coulisseau 12 par rapport à la tige 30 de piston, on place le point Pc, qui est confondu avec le point P1 , sur un palier de guidage qui reçoit Je coulisseau 12 intérieurement. Ces caractéristiques de réalisation sont mises en œuvre dans une jambe de force 10 conforme aux enseignements de l' invention qui est représentée dans son principe à la figure 6.When the strut 10 is in motion, the slider 12 moves, along the axis of suspension A-A, relative to the piston rod 30, therefore the point P1 moves relative to the point Pc. In order to avoid the displacement of the point P1 and in order to conserve travel for the displacement of the slide 12 relative to the piston rod 30, the point Pc, which coincides with the point P1, is placed on a guide bearing which receives I slide 12 internally. These embodiment characteristics are implemented in a strut 10 in accordance with the teachings of the invention which is shown in principle in FIG. 6.

" La jambe de force 10 comporte un élément inférieur, ou coulisseau 12, qui est fixé au support de moyeu 14 d'une roue par son extrémité inférieure et qui comporte un tronçon s upérieur de forme sensiblement cylindrique délimitant la chambre de travail 22 d' un amortisseur 26."The strut 10 has a lower element, or slide 12, which is fixed to the hub support 14 of a wheel by its lower end and which has a substantially cylindrical upper section delimiting the working chamber 22 of a damper 26.

La jambe de force 10 comporte aussi un élément supérieur 42 de forme globalement tubulaire qui est monté à articulation sur la caisse 20 du véhicule et qui est un palier de guidage en coulissement axial, suivant l' axe géométrique de suspension A-A, pour le coulisseau 12.The strut 10 also comprises an upper element 42 of generally tubular shape which is articulated on the body 20 of the vehicle and which is a guide bearing in axial sliding, along the geometrical axis of suspension AA, for the slider 12 .

L'amortisseur 26 comporte un piston 24 dont la tête 28 est fixée à l' extrémité axiale inférieure d' une tige 30.The damper 26 comprises a piston 24, the head 28 of which is fixed to the lower axial end of a rod 30.

La tige 30 de piston pénètre dans la chambre de travail 22 par une collerette supérieure du coulisseau 12.The piston rod 30 enters the working chamber 22 by an upper flange of the slide 12.

L' extrémité axiale supérieure de la tige 30 de piston est fixée sur la face transversale supérieure 44 du palier de guidage 42.The upper axial end of the piston rod 30 is fixed to the upper transverse face 44 of the guide bearing 42.

Selon ce mode de réalisation, la chambre de travail 22 de l' amortisseur 26 est formée dans le tronçon supérieur du coulisseau 12 de sorte que l'axe géométrique d'amortissement B-B est confondu avec l'axe de suspension A-A. La figure 7 représente le schéma de p rincipe d' un second mode de réalisation de l' invention dans laquelle l' axe d' amortissement B-B est sensiblement parallèle à l' axe de suspension A-A et il est d issocié de celui-ci.According to this embodiment, the working chamber 22 of the damper 26 is formed in the upper section of the slider 12 so that the geometric damping axis B-B coincides with the suspension axis A-A. FIG. 7 represents the principle diagram of a second embodiment of the invention in which the damping axis B-B is substantially parallel to the axis of suspension A-A and it is associated therewith.

Selon ce mode de réalisation , la chambre de travail 22 de l'amortisseur 26 et la tige 30 de piston sont agencés sensiblement parallèlement au coulisseau 12.According to this embodiment, the working chamber 22 of the damper 26 and the piston rod 30 are arranged substantially parallel to the slide 12.

La chambre de travail 22 de l'amortisseur 26 est formée dans un corps d' amortisseur 46 sensiblement cylindrique qui est fixé au coulisseau 12. Le piston 24 est fixé sur le palier de guidage 42 par l'extrémité axiale supérieure de sa tige 30.The working chamber 22 of the shock absorber 26 is formed in a substantially cylindrical shock absorber body 46 which is fixed to the slide 12. The piston 24 is fixed to the guide bearing 42 by the upper axial end of its rod 30.

On note que, selon une variante (non représentée) du second mode de réalisation, la tige 30 de piston peut être fixée au coulisseau 12 et le corps de l'amortisseur 46 peut être fixé au palier de guidage 42.It is noted that, according to a variant (not shown) of the second embodiment, the piston rod 30 can be fixed to the slide 12 and the body of the shock absorber 46 can be fixed to the guide bearing 42.

On décrira maintenant en détail, en référence à la figure 8, une jambe de force 10 qui est réalisée conformément aux enseignements de l' invention, selon le premier mode de réalisation .There will now be described in detail, with reference to FIG. 8, a strut 10 which is produced in accordance with the teachings of the invention, according to the first embodiment.

Sur la figure 8 on a représenté une portion de la caisse 20 du véhicule qui porte à articulation, par l' intermédiaire d' une rotule 48, l' élément supérieur de la jambe de force 1 0, ou palier de guidage 42.In FIG. 8, a portion of the body 20 of the vehicle is shown which carries, by articulation, by means of a ball joint 48, the upper element of the strut 1 0, or guide bearing 42.

La rotule 48 comporte une bague extérieure 50 de support qui est fixée sur la caisse 20 et une bague intérieure 52 , ou bille de rotule, qui est retenue dans la bague extérieure 50 par une rondelle de retenue 54. Le palier de guidage 42 comporte un tube de guidage 56 qui est monté dans la bille de rotule 52 et qui s'étend axialement vers le haut et vers le bas par rapport à la bille de rotule 52.The ball 48 comprises an outer support ring 50 which is fixed to the body 20 and an inner ring 52, or ball of ball, which is retained in the outer ring 50 by a retaining washer 54. The guide bearing 42 includes a guide tube 56 which is mounted in the ball joint 52 and which extends axially upwards and downwards with respect to the ball joint 52.

Le tube de guidage 56 est fermé à son extrémité axiale supérieure par un bouchon supérieur 58. L'élément inférieur 12, ou coulisseau, de la jambe de forceThe guide tube 56 is closed at its upper axial end by an upper plug 58. The lower element 12, or slide, of the strut

10 comporte un corps inférieur 60 globalement cylindrique qui délimite, dans son tronçon supérieur 62, la base de la chambre de travail 22 d' un amortisseur 26 et, dans son tronçon inférieur 64, un réservoir cylindrique 66. Le corps cylindrique inférieur 60 est monté ici dans un logement cylindrique complémentaire 68 du support de moyeu 14. Le support de moyeu 14 étant de type connu , il est représenté ici partiellement.10 comprises a generally cylindrical lower body 60 which delimits, in its upper section 62, the base of the working chamber 22 of a damper 26 and, in its lower section 64, a cylindrical tank 66. The lower cylindrical body 60 is mounted here in a complementary cylindrical housing 68 of the hub support 14. The hub support 14 being of known type, it is shown here partially.

Le réservoir cylindrique 66 est prévu pour contenir un fluide d' amortissement (non représenté) et il commun ique avec la chambre de travail 22 de l'amortisseur 26, contenant aussi le fluide d' amortissement, par un conduit 70 susceptible d' être obturé par un dispositif connu (non représenté) tel qu' un clapet. Un tube de cartouche 72 de forme cylindrique est emmanché à l' intérieur du tronçon supérieur 62 du corps cylindrique inférieur 60 et il délimite le tronçon supérieur de la chambre de travail 22. U ne douille de guidage 74, ici du type à billes, est montée à l'intérieur du tube de guidage 56, sensiblement à hauteur de la bille de' rotule 52, de manière à s'interposer radialement entre le tube de guidage 56 et le tube de cartouche 72 de l'amortisseur 26 en vue de faciliter son coulissement axial suivant l' axe de suspension A-A.The cylindrical reservoir 66 is designed to contain a damping fluid (not shown) and it communicates with the working chamber 22 of the damper 26, also containing the damping fluid, by a conduit 70 capable of being closed. by a known device (not shown) such as a valve. A cartridge tube 72 of cylindrical shape is fitted inside the upper section 62 of the lower cylindrical body 60 and it delimits the upper section of the working chamber 22. A guide sleeve 74, here of the ball type, is mounted within the guide tube 56, substantially at the height of the ball 'patella 52 so as to be interposed radially between the guide tube 56 and the cartridge tube 72 of the damper 26 in order to facilitate its axial sliding along the axis of suspension AA.

Une tige 30 de piston est montée par son extrémité axiale supérieure dans la face transversale inférieure 76 du bouchon supérieur 58 de manière que le tronçon d'extrémité axiale inférieure de la tige 30 de piston s'étende à l' intérieur de la chambre de travail 22.A piston rod 30 is mounted by its upper axial end in the lower transverse face 76 of the upper plug 58 so that the lower axial end section of the piston rod 30 extends inside the working chamber. 22.

L'extrémité axiale inférieure de la tige 30 comporte une tête 28 de piston de d iamètre extérieur sensiblement égal au diamètre intérieur du tube de cartouche 72 et qui délimite, dans la chambre de travail 22, un volume supérieur Vs et un volume inférieur Vi de dimensions variables.The lower axial end of the rod 30 comprises a piston head 28 of external diameter substantially equal to the internal diameter of the cartridge tube 72 and which delimits, in the working chamber 22, an upper volume Vs and a lower volume Vi of variable dimensions.

On note que, de manière connue, la tête 28 de piston comporte des orifices axiaux calibrés (non représentés) qui font communiquer le volume supérieur Vs et le volume inférieur Vi de la chambre de travail 22, de manière que le fluide d'amortisse- ment puisse circuler d' un volume à . l'autre en fonction du déplacement du coulisseau 12 par rapport au piston 24.It is noted that, in a known manner, the piston head 28 has calibrated axial orifices (not shown) which make the upper volume Vs and the lower volume Vi of the working chamber 22 communicate, so that the damping fluid can flow from volume to volume. the other as a function of the displacement of the slide 12 relative to the piston 24.

Avantageusement, les orifices axiaux sont équipés de clapets.Advantageously, the axial orifices are fitted with valves.

Un premier groupe G1 d' orifices axiaux comporte des clapets qui s'opposent à la circulation du fluide vers le volume inférieur Vi et un second groupe G2 d'ori ices axiaux comporte des clapets qui s' opposent à la circulation du fluide vers le volume supérieur Vs. Le tube de cartouche 72 comporte à son extrémité axiale supérieure un bouchon de cartouche 78 annulaire.A first group G1 of axial orifices comprises valves which oppose the circulation of the fluid towards the lower volume Vi and a second group G2 of axial orifices comprises valves which oppose the circulation of the fluid towards the volume higher Vs. The cartridge tube 72 has at its upper axial end an annular cartridge cap 78.

Une bague d' étanchéité 80, qui est par exemple munie de joints toriques, est interposée entre le bouchon de cartouche 78 et la tige 30 de piston.A sealing ring 80, which is for example provided with O-rings, is interposed between the cartridge stopper 78 and the piston rod 30.

Une butée élastique supérieure 82 est montée sur la tige 30 de piston de manière à s' interposer axialement entre le bouchon de cartouche 78 et le bouchon supérieur 58, lorsque le coulisseau 12 est dans sa position de butée supérieure. De préférence, le bouchon supérieur 58 est réglable en hauteur, ce qui permet de régler la hauteur de la position de butée supérieure.An upper elastic stop 82 is mounted on the piston rod 30 so as to be interposed axially between the cartridge stopper 78 and the upper stopper 58, when the slide 12 is in its upper stop position. Preferably, the upper plug 58 is adjustable in height, which makes it possible to adjust the height of the upper stop position.

Une butée élastique intermédiaire 84 est montée sur la tige 30 de piston de manière à s'interposer axialement entre le bouchon de cartouche 78 et la tête 28 de piston, lorsque le coulisseau 12 est dans sa position de butée inférieure.An intermediate elastic stop 84 is mounted on the piston rod 30 so as to be interposed axially between the cartridge stopper 78 and the piston head 28, when the slide 12 is in its lower stop position.

Avantageusement, une coupelle supérieure 86, qui est ici réglable en hauteur, est montée sur le tronçon inférieur du tube de guidage 56 de manière à former une surface d' appui axial supérieur pour un ressort de suspension 88 du type hélicoïdal.Advantageously, an upper cup 86, which is here adjustable in height, is mounted on the lower section of the guide tube 56 so as to form an upper axial bearing surface for a suspension spring 88 of the helical type.

Le corps cylindrique inférieur 60 délimite une coupelle inférieure 90 sur sa paroi axiale extérieure, ici au niveau de l'extrémité axiale inférieure de la chambre de travail 22, de manière à former une surface d'appui axial inférieur pour le ressort de suspension 88.The lower cylindrical body 60 delimits a lower cup 90 on its outer axial wall, here at the level of the lower axial end of the working chamber 22, so as to form a lower axial bearing surface for the suspension spring 88.

Le ressort de suspension 88 est donc monté sur la jambe de force 10, coaxialement à l'axe de suspension A-A, entre la coupelle supérieure 86 et la coupelle inférieure 90.The suspension spring 88 is therefore mounted on the strut 10, coaxial with the suspension axis A-A, between the upper cup 86 and the lower cup 90.

On exp liquera maintenant le fonctionnement de la jambe de force 10 selon l' invention.The operation of the strut 10 according to the invention will now be explained.

Lorsque la roue associée à la jambe de force 10 roule par exemple sur une bosse du sol, le coulisseau 12 se déplace vers le haut 'en coulissant dans la douille à billes 74 et en comprimant le ressort de suspension 88 qui amortit le déplacement. Comme le piston 24 est fixe par rapport au palier de guidage 42, le volume supérieur Vs de la chamb re de travail 22 augmente alors que son volume inférieur Vi diminue symétriquement. Par conséquent, le fluide est comprimé dans le volume inférieur Vi de la chambre de travail 20 et il circule au travers des orifices axiaux du second groupe G2 pour remplir le volume supérieur Vs de la chambre de travail 22, ce qui freine le déplacement du coulisseau 12 vers le haut. De manière similaire, lorsq ue la roue associée, à la jambe de force 10 descend de la bosse, le coulisseau 12 se déplace vers le bas sous la sollicitation du ressort de suspension 88 qui se détend.When the wheel associated with the strut 10 rolls for example on a bump in the ground, the slider 12 moves upwards by sliding in the ball bushing 74 and compressing the suspension spring 88 which dampens the movement. As the piston 24 is fixed relative to the guide bearing 42, the upper volume Vs of the working chamber 22 increases while its lower volume Vi decreases symmetrically. Consequently, the fluid is compressed in the lower volume Vi of the working chamber 20 and it circulates through axial orifices of the second group G2 to fill the upper volume Vs of the working chamber 22, which slows down the movement of the slide. 12 up. Similarly, lorsq ue the associated wheel, the strut 10 down to the bulge, the slider 12 moves downwardly under the bias of 88 suspension spring which relaxes.

Pour éviter que la détente du ressort de suspension 88 soit trop brutale, ce qui serait préjudiciable au confort des passagers du véhicule, l' amortisseur 26 freine le déplacement du coulisseau 12 vers le bas.To prevent the relaxation of the suspension spring 88 from being too sudden, which would be detrimental to the comfort of the vehicle passengers, the shock absorber 26 slows the movement of the slide 12 downwards.

Le fluide d'amortissement circule ici depuis le volume supérieur Vs vers le volume inférieur Vi de la chambre de travail 22, au travers des orifices axiaux du premier groupe G 1 .The damping fluid circulates here from the upper volume Vs to the lower volume Vi of the working chamber 22, through the axial orifices of the first group G 1.

Avantageusement, les orifices axiaux du premier groupe G1 sont de diamètres inférieurs aux orifices axiaux du second groupe G2, de sorte que l'amortissement prod uit par le laminage du fluide à travers les orifices axiaux du premier groupe G1 soit plus important que l'amortissement produit par le laminage du fluide à travers les orifices axiaux du second groupe G2.Advantageously, the axial orifices of the first group G1 are of diameters smaller than the axial orifices of the second group G2, so that the damping produced by the rolling of the fluid through the axial orifices of the first group G1 is greater than the damping produced by the rolling of the fluid through the axial orifices of the second group G2.

On note que, pendant le coulissement et su ivant la position de la roué par rapport à la caisse 20, la jambe de force 10 peut pivoter légèrement autour d' un axe sensiblement perpendiculaire à l' axe de suspension A-A au centre de la rotule 48.It is noted that, during the sliding and following the position of the wheel relative to the body 20, the strut 10 can pivot slightly around an axis substantially perpendicular to the axis of suspension AA at the center of the ball joint 48 .

On a représenté à la figure 9 une variante simplifiée du mode de réalisation de la figure 7.FIG. 9 shows a simplified variant of the embodiment of FIG. 7.

On ne décrira que les éléments qui sont différents. On remarque que la jambe de force 10 ne co mporte plus de coupelle supérieure 86 réglable, la fonction d'appui axial supérieur pour le ressort de suspension 88 étant remplie par un épaulement 92 qui est réalisé dans le tronçon inférieur de la bague intérieure 52 de la rotule 48.We will only describe the elements which are different. It is noted that the strut 10 no longer includes an adjustable upper cup 86, the upper axial support function for the suspension spring 88 being fulfilled by a shoulder 92 which is produced in the lower section of the inner ring 52 of the ball 48.

On remarq ue aussi que le tube de g uidage 56 est réalisé d'une seule pièce avec la bague intérieure 52 de la rotule 48 et il s'étend uniquement vers le haut de la bague intérieure 52.It is also noted that the guide tube 56 is made in one piece with the inner ring 52 of the ball joint 48 and it extends only upwards of the inner ring 52.

Par conséquent, la douille à billes 74 est montée directement dans la bague intérieure 52.Consequently, the ball bushing 74 is mounted directly in the inner ring 52.

De plus, le tube de guidage 56 ne comporte pas de bouchon mais il est fermé à son extrémité axiale supérieure de sorte que la tige 30 de piston est fixée directement dans la face transversale supérieure 94 du tube de guidage 56. Le fonctionnement de cette variante de l' invention est sensiblement similaire à celui du mode de réalisation décrit précédemment.In addition, the guide tube 56 does not have a plug but it is closed at its upper axial end so that the piston rod 30 is fixed directly in the upper transverse face 94 of the guide tube 56. The operation of this variant of the invention is substantially similar to that of the embodiment described above.

Bien entendu, les détails de réalisation de chacune des variantes peuvent se combiner sans sortir du cad re de l' invention. Ainsi, il est possible de réaliser une butée supérieure réglable en hauteur dans la variante de réalisation ou bien de s'en passer dans le premier mode de réalisation décrit. Of course, the details of embodiment of each of the variants can be combined without departing from the scope of the invention. Thus, it is possible to produce an upper stop adjustable in height in the variant embodiment or else to do without it in the first embodiment described.

Claims

REVENDICATIONS 1 . Jambe de force (10) d' un dispositif de suspension d'un véhicule automobile, notamment pour une suspension du type MacPherson , du type comportant un élément inférieur (12) , ou coulisseau, qui est monté sur le support de moyeu (14) d' une roue (16) par son extrémité inférieure et qui comporte un tronçon supérieur de forme sensiblement cylindrique (72), et un élément supérieur (42) qui est monté à articulation sur la caisse (20), ou le châssis, du véhicule, du type dans lequel le coulisseau inférieur (12) est monté coulissant par rapport à l'élément supérieur (42), suivant un axe géométrique de suspension (A-A), et d u type dans lequel un amortisseur (26) et un élément élastique de suspension (88) sont interposés axialement (A-A) entre le coulisseau inférieur (12) et l'élément supérieur (42), caractérisée en ce que l' élément supérieur (42) est un palier de guidage en coulissement axial (A-A) qui reçoit intérieurement le tronçon supérieur (72) du coulisseau inférieur (12).1. Strut (10) of a suspension device for a motor vehicle, in particular for a MacPherson type suspension, of the type comprising a lower element (12), or slide, which is mounted on the hub support (14) of a wheel (16) at its lower end and which comprises an upper section of substantially cylindrical shape (72), and an upper element (42) which is articulated on the body (20), or the chassis, of the vehicle , of the type in which the lower slide (12) is slidably mounted relative to the upper element (42), along a geometric axis of suspension (AA), and of the type in which a shock absorber (26) and an elastic element of suspension (88) are interposed axially (AA) between the lower slider (12) and the upper element (42), characterized in that the upper element (42) is an axial sliding guide bearing (AA) which receives internally the upper section (72) of the lower slide (12). 2. Jambe de force (10) selon la revendication précédente, caractérisée en ce que l' amortisseur (26) comporte un piston (24) dont la tête (28) est fixée à l'extrémité d' une tige (30) et qui est susceptible de coulisser axialement, suivant un axe géométrique d' amortissement (B-B) sensiblement parallèle à l' axe de suspension (A-A), dans une chambre de travail (22) de forme sensiblement tubulaire contenant un fluide d'amortissement, et en ce que la tige (30) de piston est solidaire du palier de guidage (42) , ou du coulisseau inférieur (12), et la chambre de travail (22) tubulaire est solidaire du coulisseau inférieur (12), respectivement du palier de guidage (42).2. Strut (10) according to the preceding claim, characterized in that the damper (26) comprises a piston (24) whose head (28) is fixed to the end of a rod (30) and which is capable of sliding axially, along a geometric damping axis (BB) substantially parallel to the suspension axis (AA), in a working chamber (22) of substantially tubular shape containing a damping fluid, and in this that the piston rod (30) is integral with the guide bearing (42), or with the lower slide (12), and the tubular working chamber (22) is integral with the lower slide (12), respectively with the guide bearing ( 42). 3. J ambe de force (10) selon la revendication précédente, caractérisée en ce que la chambre de travail (22) de l' amortisseur3. J ambe de force (10) according to the preceding claim, characterized in that the working chamber (22) of the damper (26) est formée dans le tronçon supérieur du coulisseau inférieur (12) et en ce que la tige (30) de piston est fixée au palier de guidage (42), de manière que l'axe d' amortissement (B-B) soit sensiblement confondu avec l' axe de suspension (A-A). (26) is formed in the upper section of the lower slide (12) and in that the piston rod (30) is fixed to the guide bearing (42), so that the damping axis (BB) is substantially confused with the suspension axis (AA). 4. Jambe de force (10) selon Ja revendication précédente, caractérisée en ce que le tronçon inférieur (64) du coulisseau (12) comporte un logement (66) pour un réservoir de fluide d'amortissement qui est susceptible de communiquer avec la chambre de travail (22) par un conduit (70).4. Power strut (10) according to the preceding claim, characterized in that the lower section (64) of the slide (12) comprises a housing (66) for a reservoir of damping fluid which is capable of communicating with the chamber working (22) by a conduit (70). 5. Jambe de force (10) selon la revendication 2, caractérisée en ce que T axe d' amortissement (B-B) est distinct de l'axe de suspension (A-A).5. Strut (10) according to claim 2, characterized in that T damping axis (B-B) is distinct from the suspension axis (A-A). 6. Jambe de force (10) selon l' une quelconque des revendications précédentes, caractérisée en ce que l' élément élastique de suspension est un ressort (88) du type hélicoïdal qui est coaxial à l'axe de suspension (A-A).6. Strut (10) according to any one of the preceding claims, characterized in that the elastic suspension element is a spring (88) of the helical type which is coaxial with the suspension axis (A-A). 7. Jambe de force (10) selon la revendication précédente, caractérisée en ce que le ressort de suspension (88) est en appui axial inférieur sur une coupelle inférieure (90) solidaire du coulisseau (12), et il est en appui axial supérieur sur une coupelle supérieure (86) solidaire du palier de guidage (42) .7. Strut (10) according to the preceding claim, characterized in that the suspension spring (88) is in lower axial support on a lower cup (90) integral with the slide (12), and it is in upper axial support on an upper cup (86) integral with the guide bearing (42). 8. Jambe de force (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu' une douille de guidage (74), par exemple du type à billes, est interposée rad ialement entre le palier de gu idage (42) et le tronçon supérieur (72) du coulisseau (12). 8. Strut (10) according to any one of the preceding claims, characterized in that a guide sleeve (74), for example of the ball type, is interposed rad ially between the guide bearing (42) and the upper section (72) of the slide (12).
PCT/FR2001/001778 2000-06-27 2001-06-08 Single steady bearing tension strut for mcpherson suspension Ceased WO2002000457A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR00/08217 2000-06-27
FR0008217A FR2810586B1 (en) 2000-06-27 2000-06-27 FORCE LEG WITH SINGLE GUIDE BEARING FOR A MACPHERSON-TYPE SUSPENSION

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WO2002000457A1 true WO2002000457A1 (en) 2002-01-03

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FR (1) FR2810586B1 (en)
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Publication number Priority date Publication date Assignee Title
WO2004085873A1 (en) * 2003-03-26 2004-10-07 Daimlerchrysler Ag Wheel suspension

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
WO2012028177A1 (en) * 2010-08-31 2012-03-08 Aktiebolaget Skf Suspension thrust bearing with filtering element

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US1855064A (en) * 1929-04-08 1932-04-19 Messier George Louis Rene Jean Elastic shock absorbing apparatus
US2197163A (en) * 1937-10-22 1940-04-16 Fiat Spa Independent wheel suspension for motor vehicles
US2935334A (en) * 1957-03-08 1960-05-03 Ford Motor Co Motor vehicle wheel suspension
FR1220306A (en) * 1958-02-15 1960-05-24 Daimler Benz Ag Separate wheel suspension for vehicles, in particular for motor cars
FR1482488A (en) * 1965-08-25 1967-05-26 Porsche Kg Suspension for independent wheels of motor vehicles
JPS6430813A (en) * 1987-07-28 1989-02-01 Toyota Motor Corp Suspension
FR2731656A1 (en) * 1995-03-16 1996-09-20 Peugeot Telescopic suspension leg for use in vehicle hydro-pneumatic suspension

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Publication number Priority date Publication date Assignee Title
US1855064A (en) * 1929-04-08 1932-04-19 Messier George Louis Rene Jean Elastic shock absorbing apparatus
US2197163A (en) * 1937-10-22 1940-04-16 Fiat Spa Independent wheel suspension for motor vehicles
US2935334A (en) * 1957-03-08 1960-05-03 Ford Motor Co Motor vehicle wheel suspension
FR1220306A (en) * 1958-02-15 1960-05-24 Daimler Benz Ag Separate wheel suspension for vehicles, in particular for motor cars
FR1482488A (en) * 1965-08-25 1967-05-26 Porsche Kg Suspension for independent wheels of motor vehicles
JPS6430813A (en) * 1987-07-28 1989-02-01 Toyota Motor Corp Suspension
FR2731656A1 (en) * 1995-03-16 1996-09-20 Peugeot Telescopic suspension leg for use in vehicle hydro-pneumatic suspension

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Publication number Priority date Publication date Assignee Title
WO2004085873A1 (en) * 2003-03-26 2004-10-07 Daimlerchrysler Ag Wheel suspension

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FR2810586B1 (en) 2002-11-01
AR030706A1 (en) 2003-09-03

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