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
  • 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
• • 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
• • 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
  • B60G2204/124—Mounting of coil springs
  • B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
• • 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
  • B60G2204/418—Bearings, e.g. ball or roller bearings
• • 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
  • B60G2204/45—Stops limiting travel
  • B60G2204/4502—Stops limiting travel using resilient buffer
  • B60G2204/45021—Stops limiting travel using resilient buffer for limiting upper mount movement of a McPherson strut
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/08—Front or rear portions
  • B62D25/088—Details of structures as upper supports for springs or dampers

Definitions

• the invention relates, in general, to the technical field of automobile vehicle suspensions.
• the invention relates more specifically to a filter sub-assembly for an upper stop assembly of a motor vehicle suspension, to an associated assembly and to a suspension strut integrating such a stop assembly, and to a method of assembling such a filter sub-assembly.
• the suspension struts of a motor vehicle comprising a helical spring wound around a telescopic shock absorber are linked to the body of the vehicle at the level of a multifunctional interface, called the upper suspension stop, which notably integrates fastening functions to the body, guiding the rotation of the upper end of the coil spring and/or the suspension strut during rotation when turning the wheels, maintaining the rod of the telescopic shock absorber, if necessary with filtration vibration, and support of a shock buffer at the end of travel of the body of the telescopic shock absorber.
• Such a stop requires a large number of parts, some of which can be preassembled before mounting on the vehicle, and others must be assembled at the time of attachment to the vehicle.
• This thrust bearing comprises a rolling bearing comprising an upper washer, a lower washer and balls circulating on raceways formed on the upper and lower washers, as well as a rigid multifunction part consisting of a stamped sheet metal and an elastomeric filter block positioned between the upper washer and the multifunction part.
• the multifunction part has a plurality of fixing holes, each opening onto a support wall facing downwards. Nuts are welded to the multifunction part at the level of the support walls, in the extension of the fixing holes. It is thus possible to fix the upper stop to the body of the vehicle using screws which pass through the fixing holes and screw into the nuts. Before its assembly on the vehicle, the stop does not form a coherent whole. Precautions must also be taken to protect the metal multifunction part against corrosion.
• a filter sub-assembly for an upper stop assembly of a suspension strut of a motor vehicle, the filter sub-assembly comprising: a filter block made of elastomeric material, the filter block extending along a reference axis and having an interface for securing one end of a rod of a shock absorber of the suspension strut; a lower filter block support having an annular central portion bearing against a lower face of the filter block and traversed axially by a passage for the end of the shock absorber rod, the lower support having an annular peripheral portion surrounding the central portion annular; and a filter block cover comprising a central portion bearing against an upper face of the filter block, a peripheral portion surrounding the central portion and bearing against the annular peripheral portion of the lower support, remarkable in that the filter sub-assembly comprises in in addition to a lock washer, a first member of the lower support and the cover being located axially between the lock
• At least some of the fixing flaps project from the annular peripheral portion of the second element.
• Figure 1 a sectional view of an upper part of a suspension strut of a motor vehicle, and an upper suspension stop assembly of this suspension strut, according to a first embodiment
• Figure 2 an isometric perspective view of the assembly of Figure 1
• Figure 3 an isometric perspective and exploded view of an upper suspension stop assembly according to a second embodiment
• Figure 4 a perspective and partially exploded view of the upper suspension stop assembly of Figure 3, where a filter sub-assembly is illustrated without being exploded
• Figure 5 a perspective and partially exploded view of the upper suspension stop assembly of Figure 3
• Figure 6 a view of the upper suspension stop assembly of Figure 3 in a relative position of interpenetration of fixing flaps in notches associated with the locking washer in the unlocked position
• Figure 7 a view of the upper suspension stop assembly of Figure 3 in a relative position of assembly of the fixing flaps in the notches associated with the locking washer in the locked position
• the rolling bearing 2 has angular contact, and the rolling bodies 6 are in contact with a radially outer zone of the raceway 8 of the upper washer 5 and with a radially inner zone of the raceway 7 of the lower washer 4, the inner zone being radially inside the outer zone, relative to the axis of rotation A2.
• the balls are separated and held approximately equidistant using a 6' cage.
• the suspension strut is oriented in such a way that the assembly 100 is located generally “under” the body 103 and the helical spring 105 is located at least partially “under” the assembly 100.
• the annular bearing support 80 can be made for example of plastic material, or of a metal alloy, for example of aluminum injected under pressure, with or without a reinforcing insert, and forms a plane annular support face turned, axially relative to the axis of rotation A2, opposite the bearing 2, as well as a cylindrical guide face facing radially outwards.
• the filter block 20 is formed of elastomeric material and extends along a reference axis Al, the filter block 20 having an interface 21 for securing one end of a rod 102 of a telescopic shock absorber 106 of the leg suspension, which passes through a slot formed in the shock pad 104 and a passage 33 of the support 30.
• the filter block support 30 can be made of a metal alloy, for example steel or aluminum injected under pressure, and preferably in one piece, that is to say in one piece.
• the support 30 is formed from steel, from a stamped sheet.
• the filter block support 30 comprises a wall 34 having an upper face 35 facing the filter block and an opposite lower face 36, supporting a shock pad 104 of the suspension. More precisely, the filter block support 30 has an annular central portion 31 bearing against a lower face 22 of the filter block 20 and crossed axially by the passage 33 for the end of the rod 102 of shock absorber 106, the lower support 30 having an annular peripheral portion 32 surrounding the annular central portion 31.
• the rigid one-piece support 30 of the filter block 20 is constituted by a stamped sheet which forms a housing bowl for the block filter 20, arranged radially inside the bearing 2, in radial contact with said bearing 2, and a collar surrounding the bowl, placed on the bearing 2. More precisely, the lower support 30 of the filter block has a cylindrical skirt 39A configured to fit snugly with a cylindrical portion 5A of the bearing 2 of the assembly 100 and an external transverse shoulder 39B to come to bear against an upper face 5B of said bearing 2 so that the filter sub-assembly 10 is in support directly against landing 2.
• the housing bowl of the filter block 20 has a bottom 35 constituting an intermediate wall between the filter block 20 and the impact pad 104.
• a lower face of this intermediate wall constitutes a support for the shock pad 104 of the suspension.
• the upper face of the intermediate wall is in contact with the filter block 20, the bottom 35 receiving the filter block 20 in axial support against a lower face 22 of said filter block 20.
• the filter block support 30, in particular here the sheet metal constituting the rigid one-piece support 30, is annular and the bottom 35 of the bowl has a circular opening forming the passage 33 for the end of the rod 102 of the shock absorber 106 telescopic.
• the filter block support 30 has a symmetry of revolution around the reference axis Al which also corresponds to a reference axis for the telescopic shock absorber 106 in its reference position, the shock buffer 104 and the filter block 20.
• This axis of symmetry Al is here parallel, and coincident, with the axis of rotation A2 of bearing 2, although other configurations are possible, in particular a configuration (not illustrated) in which the reference axis Al is secant with the axis of rotation A2 of bearing 2.
• the filter block cover 40 makes it possible to compress the filter block 20 at the latest at the time of assembly on the vehicle, so that the filter block 20 is in preload between the lower support 30 and the filter block cover 40.
• the cover 40 can be made for example of rigid plastic material, if necessary with reinforcements or inserts.
• the cover 40 of the filter block comprises a central portion 41 bearing against an upper face 23 of the filter block 20, and a peripheral portion 42 surrounding the central portion 41 and bearing against the annular peripheral portion 32 of the lower support 30.
• the cover 40 filter block also has an outer protective skirt 49 located radially outside and at least partially facing an outer peripheral face 82 of the bearing support 80 to delimit a sealing baffle 83 in order to protect the bearing 2 .
• the fixing means for ensuring the fixing of the cover 40 with the lower support 30 of the filter block comprise fixing flaps 50 secured to the lower support 30 by projecting from the annular peripheral portion 32 of the lower support 30
• These flaps 50 are distributed, and preferably equally distributed, on the annular peripheral portion 32 of the support 30 and there are six in number.
• These flaps 50 each have the shape of a hook and are configured to penetrate in the fixing position into fixing orifices 60 of the cover 40.
• These fixing orifices 60 are located on the peripheral portion 42 of the cover 40 and associated with the flap 50 for fixing the lower support 30.
• each flap 50 also has a distal portion 52 of the associated fixing flap 50 extending at least along a component perpendicular to the axial direction and which is placed in overlap with a bearing surface on one side of the opposite cover 40 to the peripheral portion 32 of the lower support 30 to ensure, despite a preloading force of the filter block 20, the fixing of the cover 40 with the lower support 30 of the filter block.
• the filter subassembly 10 further comprises a locking washer 90.
• This locking washer 90 is here metallic, formed from a stamped sheet metal.
• the cover 40 is located axially between the locking washer 90 and the lower support 30, pairs of flaps 50 and notches 96 being formed on the locking washer 90 and the lower support 30. It should be noted that according to a variant not illustrated here, it A configuration could be obtained in which the lower support 30 is located axially between the locking washer 90 and the cover 40.
• the fixing of the cover 40 with the lower support 30 is ensured by the cooperation of the fixing flaps 50 with the notches 96, in the manner of a bayonet fixing. Indeed, the assembly of the filter subassembly 10 is ensured following a mechanical sequence of adapted movements.
• the cover 40 is positioned so as to be axially between the locking washer 90 and the lower support 30.
• the locking washer 90 and the lower support 30 are movable the one in relation to the other between a relative approach position and a relative position of interpenetration. This movement is obtained by a relative translational movement between the locking washer 90 and the lower support 30 along the reference axis Al such that, in the relative interpenetration position, each of the fixing flaps 50 penetrates into the associated notch 96.
• the locking washer 90 and the lower support 30 are movable relative to each other between the relative position d interpenetration and a relative assembly position. This movement is obtained by a relative rotational movement between the locking washer 90 and the lower filter block support 30 around the reference axis Al so that in the relative assembly position, each of the fixing flaps 50 is housed in a circumferential extension of the associated notch 96 and is retained there axially in axial support against a rim of the associated notch.
• the notches 96 can take various shapes. However, they each have a first part 961 extending parallel to the reference axis Al and whose opening is configured in its dimension to be crossed by an axial template of the associated fixing flap 50, and a second part 962 of the notch 96 extending circumferentially relative to the reference axis Al of the filter subassembly 10 from the first part 961.
• each flap 50 forming a hook head When moving from the relative approach position to the relative interpenetration position, the distal portion 52 of each flap 50 forming a hook head is moved axially through a fixing orifice 60 associated with the fixing flap 50 of the lower support 30 then through the first part 961 associated with each of the notches 96. In the interpenetration position, the proximal part 51 of each fixing flap 50 forming a hook base is placed through the first part 961 associated with each of the notches 96.
• each flap 50 when moving from the relative interpenetration position to the relative assembly position, the proximal portion 51 of each flap 50 is moved in rotation and is housed in the circumferential extension 962 of the notch 96 associated with reduced cross section compared to the size of each flap 50 for fixing and in particular to the template of each associated distal portion 52.
• the reduced section of the circumferential extension forming the second part 962 of the notch 96 relative to the first part 961 offers an axial grip for the distal portion 52 of the associated fixing flap 50.
• the bearing surface is here carried by the locking washer 90 so that each fixing flap 50 is retained axially by the locking washer 90 in the relative assembly position thus ensuring the fixing of the cover 40 with the support lower 30 of filter block.
• the fixing orifices 60 of the cover 40 are dimensioned so as not to constrain this rotational movement when moving the filter sub-assembly 10 from the relative interpenetration position to the relative assembly position, the portion peripheral 42 of the cover 40 carrying the fixing orifices 60 being located axially between the annular peripheral portion 32 of the lower support 30 and the locking washer 90.
• These rotation blocking means 59 comprise at least one elastic strip, preferably a plurality of elastic strips, and preferably as many elastic strips as fixing flaps 50.
• Each of the elastic strips is positioned adjacent circumferentially to one of the fixing flaps 50, and extends from a base towards a strip head extending circumferentially and along an axial component so as to protrude axially, on the side of the associated flap 50.
• each associated strip extending circumferentially from a circumferential edge of said corresponding fixing orifice 60 also penetrates into the associated notch 96 so as to form an obstacle to the rotation of the locking washer 90 when it is in the relative assembly position.
• the lamellas are formed by stamping.
• each flap 50 penetrates into the first part 961 of the associated notch 96, the elastic strip being constrained to bear against a lower surface of the locking washer 90.
• the proximal portion 51 of each flap 50 is moved in rotation and is housed in the second part 962 of the notch 96 releasing in the first part 961 of the notch 96 a surface in which the elastic strip comes face to face in the relative assembly position and the elastic release of which places the corresponding strip in the space delimited by the first part 961 of the notch 96.
• the heads of each locking strip 59 obstruct the associated notches 96 and are each placed in the thickness of the locking washer 90 blocking any rotation which would tend to move it from the relative assembly position to the position d 'interpenetration.
• the translation of the cover 40 and the support 30 is such that the parts come together, the block filter 20 being located between these two parts. It is during this step that the filter block 20 is brought into compression by the cover 40 and the lower support 30, so that the filter block 20 is placed in preload between the lower support 30 and the block cover 40. filtering.
• the relative rotation of the cover 40 and the lower support 30 during movement from the relative interpenetration position to the relative assembly position then makes it possible to axially lock the filter sub-assembly 10 and the compressed position of the filter block 20 making it possible to ensure preload.
• the filter sub-assembly comprises a first element among the lower support 30 and the cover 40 located axially between the locking washer 90 and a second element among the lower support 30 and the cover 40, flaps 50 and notches 96 being formed on the locking washer 90 and the second element, each of the fixing flaps 50 formed on a part among the locking washer 90 and the second element being associated with one of the notches 96, formed on another part among the locking washer 90 and the second element, the method of assembling the filter subassembly 10 comprising at least the steps following: the passage from the relative approach position to the relative interpenetration position by relative translation movement between the first and the second element along the assembly axis Al so as to cause fixing flaps 50 to penetrate into associated notches 96, each of the notches 96 being associated with one of the elements among the first and the second element and with one of the flaps 50 for fixing integral with the other of the elements among the first and the second element, the passage of the relative interpenetration position and the relative assembly
• the first element is the cover 40 and the second element is the lower support 30.
• the first element could be the support 30, and the second element would be the filter block cover 40.
• the annular portion 1031 of the body element 103 of the motor vehicle is clamped axially between the annular peripheral portion of the cover 40, and the locking washer 90.
• the fixing flaps 50 and the notches 96 can be distributed over one or the other of the first and second elements.
• the cover 40 is suitable for fixing the upper stop assembly 100 to the body 103 of the vehicle. To this end, it comprises a plurality of fixing interfaces distributed around the perimeter of the cover 40, three in number in this embodiment but which may be more or less numerous if necessary. Each of these fixing interfaces has an opening 44, which in this embodiment is a tapped hole playing the functional role of a nut configured to receive a fixing screw, but can where appropriate be a hole for receiving another means fastening, such as a rivet for example, or a screw/nut assembly. To ensure the rigid fixing of the fixing screws, the threaded interface serving as a nut is formed in metal by an insert fitted locally at the level of each opening 44 in the plastic material of the cover 40.
• the fixing of the cover 40 with the lower support 30 of the filter block is carried out independently of that of the filter sub-assembly 10 to a body element 103 of the motor vehicle. thanks to the openings 44.
• the fixing openings 44 for directly or indirectly fixing the filter sub-assembly 10 to a body element 103 of the motor vehicle are constituted by the fixing orifices 60 associated with the flaps 50 for fixing the lower support 30. In this way, we pool the fixing functions for the same opening and here we minimize the drillings and fixing interfaces carried by the cover 40.
• the body element 103 of the motor vehicle to which the filter sub-assembly 10 is fixed has an annular portion 1031 clamped axially between the annular peripheral portion 42 of the cover 40 and the locking washer 90.
• the locking washer 90 remains above the cover 40 to ensure its fixation in the same manner as in the first embodiment, and has openings configured to come opposite each of the orifices 60 for fixing the cover 40 and to be each crossed by an elastic blocking means to lock the assembled position.
• FIGs 11 and 12 illustrate a third embodiment.
• This third embodiment differs from the second embodiment essentially in that the annular portion 1031 of the body element 103 of the motor vehicle to which the filter subassembly 10 is fixed does not have openings but is fixed by simply being clamped axially between the annular peripheral portion 42 of the cover 40 and the locking washer 90.
• the annular portion 1031 of the body element 103 is arranged radially outside relative to the lower support 30.
• the centering of the annular portion 1031 relative to the reference axis Al is ensured by a radially interior edge of the annular portion 1031 and of circular shape configured to cooperate, or even be adjusted, around the radial exterior edges of all of the fixing flaps 50 by forming support zones circumscribed in a circle of complementary dimensions.
• the fixing flaps 50 are therefore surrounded radially by the annular portion 1031 of the body element 103 which can come to bear against them in the event of radial movement and thus remain coaxial with the reference axis Al.
• the part conical shape of the cover 40 also ensures a centering function in the body element 103.
• the shape of the notches can for example vary without modifying their function.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vehicle Body Suspensions (AREA)
• Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
• Fluid-Damping Devices (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=83280324

Family Applications (1)

Country Status (6)

Family Cites Families (13)

• 2022
  • 2022-07-07 FR FR2206993A patent/FR3137610B1/fr active Active
• 2023
  • 2023-07-03 EP EP23738010.0A patent/EP4551414A1/de active Pending
  • 2023-07-03 CN CN202380051901.0A patent/CN119486898A/zh active Pending
  • 2023-07-03 JP JP2024575335A patent/JP2025521556A/ja active Pending
  • 2023-07-03 US US18/880,315 patent/US20250153524A1/en not_active Abandoned
  • 2023-07-03 WO PCT/EP2023/068276 patent/WO2024008665A1/fr not_active Ceased

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