EP1360432A2 - Element de fixation central pour ressort a gaz a symetrie de rotation - Google Patents

Element de fixation central pour ressort a gaz a symetrie de rotation

Info

Publication number
EP1360432A2
EP1360432A2 EP02716694A EP02716694A EP1360432A2 EP 1360432 A2 EP1360432 A2 EP 1360432A2 EP 02716694 A EP02716694 A EP 02716694A EP 02716694 A EP02716694 A EP 02716694A EP 1360432 A2 EP1360432 A2 EP 1360432A2
Authority
EP
European Patent Office
Prior art keywords
pin
cap
fastening element
vehicle body
element according
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.)
Withdrawn
Application number
EP02716694A
Other languages
German (de)
English (en)
Inventor
Ludger Burstedde
Michael Guse
Andreas Opara
Christian Ottawa
Hans Scheerer
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1360432A2 publication Critical patent/EP1360432A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/0454—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by the assembling method or by the mounting arrangement, e.g. mounting of the membrane
    • 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
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid 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
    • B60G2204/44—Centering or positioning means
    • B60G2204/4404—Retainers for holding a fixing element, e.g. bushing, nut, bolt etc., until it is tightly fixed in position

Definitions

  • the invention relates to a central fastening element for a rotationally symmetrical vehicle gas spring, which contains a bellows which has central bores or recesses in the region of its end faces, the fastening element being fixed to the vehicle body and projecting normally from the surroundings of the fastening point and being encompassed by the bores or recesses ,
  • the gas spring consists among other things of a vertical bellows and two rotationally symmetrical bodies on the top and bottom of these. At the top, the gas spring is fixed to the vehicle body, eg the vehicle frame, with the help of a screw. This screw sits in a hole in the frame and is screwed to the upper rotationally symmetrical body, a so-called pin.
  • the bellows itself is attached to the upper rotationally symmetrical component with the help of a tension band.
  • the diameter of this pin is as large as the inside diameter of the rolling bellows.
  • This type of attachment requires accessibility of the screw head on the top of the frame during assembly. This makes it difficult to automate the assembly of the gas spring.
  • the gas spring tends to twist during assembly and when compressing and rebounding. The tightening torque of the screw must therefore be chosen so high that the connection between the gas spring and the vehicle body does not loosen or loosen in the event of vibrations and shocks.
  • the present invention is therefore based on the problem of creating a fastening element which enables simple assembly and allows the bellows to be rotated relative to the chassis and / or the vehicle body during the initial assembly and / or the first start-up.
  • the fastening element comprises a profiled pin or a profiled cap, the maximum outside diameter of the pin or the cap being at least smaller than one fifth of the maximum outside diameter of the gas bellows.
  • the cap or the pin have at least one constriction or waist, the outer diameter of which is smaller than the aforementioned maximum diameter of the cap or the pin.
  • the end face is elastic in the zone in which it comes into contact with the pin or the cap.
  • the central fastening element is attached to the vehicle body before assembly of the gas spring and protrudes normally therefrom.
  • the gas spring is used for attached to the handlebars of the chassis and pressed together with it against the profiled pin or the profiled cap.
  • the term spigot also includes the profiled cap.
  • the elastic zone of the front side of the gas spring comes into contact with the pin when it is pushed open and then snaps into place like a push button.
  • the pin has a constriction which is positively and / or non-positively gripped by the bore or the recess.
  • This type of attachment enables automated assembly of the gas spring.
  • the gas spring can twist on the pin, which prevents the rolling bellows from twisting and thereby increasing wear. Due to the positive connection between the pin and the spring, vibrations and shocks do not lead to the fastening element being released.
  • the gas spring is thus fixed in the axial and radial directions after assembly. It can e.g. do not loosen when jacking up the vehicle or in the event of pressure loss.
  • the gas spring can be attached to its upper and lower ends in the same way.
  • Supply lines can be routed into the interior of the gas spring through the fastening element.
  • the bottom of the gas bellows can at least in some areas consist of an elastic material, for example rubber.
  • the floor acts as a damping layer.
  • the floor can also be multi-layered, for example made of a rubber and a metal layer.
  • the gas bellows is attached to the metal layer.
  • the metal Layer of increasing the strength of the bottom of the gas spring. Several rubber and metal layers can also be combined.
  • this rubber layer is compressed between two surface sections of the pin oriented in opposite axial directions or between a surface section oriented in the direction of the vehicle body and the vehicle body.
  • the inner layer is a metal layer.
  • the gas bellows is then attached to this.
  • This layer can be designed so that it supports the rubber layer and secures the position of the gas spring on the pin.
  • Figure 1 Attaching a gas spring to the vehicle body
  • Figure 2 Alternative attachment of a gas spring to the vehicle body
  • Figure 1 shows the attachment of a gas spring (70) on a vehicle body (5) or on a handlebar.
  • the gas spring (70) An air spring, for example, consists of a bellows (72) attached to a steamer plate (50).
  • the damper plate (50) forms the bottom of the gas bellows (72).
  • a fastening element (10) is arranged on the vehicle body (5), for example the vehicle frame, a body support or a reinforced part of the body sheet.
  • a bolt (15) is arranged on the vehicle body (5) in a concave, possibly rotationally symmetrical recess (6).
  • This bolt (15) can e.g. be welded on.
  • the bolt (15) has a thread (16).
  • a mushroom-shaped cap (19) is screwed onto this thread (16) via an internal thread (21).
  • the cap (19) is rotationally symmetrical and has a cylindrical outer contour (23) in the upper area. In the middle area the contour goes e.g. discontinuously in a circular arc (24). This transition is referred to below as constriction (25), undercut or waist.
  • the center of the circular arc (24) has e.g. on the radius of the cylindrical outer contour (23) or below.
  • the arcuate section (24) is referred to below as an annular bead.
  • the cap (19) tapers with a steady or discontinuous transition between the annular bead (24) and a conical part (28) to about three quarters of its upper diameter.
  • the annular bead (24) can also have a triangular partial cross-sectional contour.
  • the annular bead (24) has a truncated cone-shaped surface, the imaginary cone tip to the center of the interior of the bellows shows.
  • the bottom surface of this frustoconical tip adjoins the constriction (25), for example discontinuously, with the formation of a barb-shaped undercut.
  • the frustoconical tip can also be an imaginary envelope surface for a series of resilient barbs arranged around the cap (19). These barbs hook after assembly - under springs - in the groove (54) of the damper plate (50), which may then have a sharp shape.
  • the damper plate (50) is arranged around the cap (19).
  • the top of the damper plate (50) is referred to as the outside (59) and the bottom as the inside (58).
  • the cylindrical damper plate (50) is made of rubber and has a central bore (52) which is smaller than the maximum outer diameter of the cap (19).
  • a depression in the form of a circumferential groove (54) is arranged at about half the height of the bore (52). This has the opposite contour to the annular bead (24) and thus ensures that the damper plate (50) engages behind the cap (19).
  • the area of the damper plate (50) between the groove (54) and the outside (59) can be compressed.
  • the bore (52) merges into a chamfer (57) on the upper end face of the damper plate (50).
  • the damper plate (50) is also chamfered on the lower end face.
  • the thickness of the damper plate (50) corresponds approximately to the length of the cap (19) in the central area, but the thickness is reduced to approximately two thirds of the total height in the outer area.
  • the inside (58) is almost flat.
  • a metal disc (62) and a thin rubber layer (63) are arranged on the damper plate (50) on the outside (59). Both parts can be glued or vulcanized, for example.
  • a shaped disk (64) is arranged on the inside (58), the central region of which is shaped towards the middle to form a truncated cone.
  • the upper edge of the truncated cone shell can, for example, be oriented along the groove (54) and thus stiffen the rubber layer between the bore (52) and the shaped disk (64). This improves the function of the rear grip, for example.
  • This shaped disk (64) can, for example, be vulcanized into the damper plate (50).
  • At least two bores (65) are arranged in the damper plate (50). These are cylindrical in the area of the upper metal disk (62), the thin rubber layer (63) and the damper plate (50).
  • the diameter of the bores (65) in the shaped disk (64) is adapted to the cover screws (68).
  • the gas bellows (72) is attached to the damper plate (50) with these cover screws (68).
  • the damper plate (50) lies against the vehicle body (5) in the area of the recess (6) of the vehicle frame and in the area of the rubber plate (63).
  • FIG. 2 shows an alternative way of fastening the gas spring (70) to the vehicle body (5).
  • a bolt (15) with an external thread (16) is arranged in a recess (6) in the vehicle body (5).
  • a cap (19) is also screwed onto the bolt (15).
  • This cap (19) has two circumferential beads (24) at the transition from the conical part (28) to the cylindrical outer contour (23), in the area of the cap (19) of which the outer diameter is larger than in the area of the cylindrical outer contour (23).
  • the distance between the two beads (24) is For example, approximately as large as half the difference in the diameter of a bead (24) and the cylindrical outer contour (23).
  • the conical part (28) of the cap (19) is tapered towards the bottom.
  • the damper plate (50) of the gas spring (70) is a cylindrical, rotationally symmetrical rubber plate which has a central bore (52).
  • the bore (52) has two circumferential grooves (54). These have the opposite contour to the ring beads (24) and ensure the elastic engagement of the damper plate (50) on the cap (19). The area of the damper plate (50) between the grooves (54) may be compressed.
  • the thickness of the damper plate (50) corresponds to approximately two thirds of the length of the cap (19) in the cap area.
  • the outside (59) of the damper plate (50) is flat here.
  • the damper plate (50) is e.g. metallic shaped disc (80) which is vulcanized in, for example. It has a central bore (82). The thickness of this shaped disk (80) in the vicinity of the bore (82) is approximately twice as high as in the rest of the shaped disk (80). The diameter of the bore (82) is approximately one third of the total diameter of the shaped disk (80). A recess (83) is arranged approximately centrally in this cylindrical bore (82). The damper plate (50) engages in the latter and thus enables an axial form fit. The bore (82) of the shaped disk (80) surrounds the damper plate (50) for stiffening in the area of the grooves (54).
  • the shaped disk (80) has at least two countersunk bores (86) in the outer region. Lid screws (68) are arranged in these countersunk bores (86), cf. Figure 1
  • metal (62, 64) and / or rubber washers (63) according to FIG. 1 can also be vulcanized into the damper plate (50).
  • the gas spring bellows (72) preassembled with the damper plate (50) is inserted into the intended position.
  • the central bore (52) of the damper plate (50) is aligned and centered on the cap (19).
  • the chamfer (57) of the bore (52) then sits on the conical part (28) of the cap (19).
  • the damper plate (50) is, if necessary, pushed together with the bellows (72) against the cap (19) and pushed over the ring bulges (24) with elastic expansion of the damper plate (50), the grooves (54 ) on the ring bead (s) (24).
  • This gas spring (70) can be locked in the depressurized state during the automatic assembly of the axle. No additional safety measures such as gluing or applying a torque are required for assembly. Also, no special tool is required for the assembly or disassembly of the gas spring (70) in the exemplary embodiments.
  • the gas spring (70) centers itself over the chamfer (57) of the damper plate (50) on the cap (19).
  • the spring (70) can align itself around the fastening element (10).
  • the upper or lower damper plate (50) of the gas spring (70) can also be designed with a blind hole instead of a bore (52). In this case, there is no sealing of the interior of the gas spring (70) in the area of the fastening.
  • the damper plate (50) can also be part of the bellows (72). In this case, the pre-assembly of the bellows (72) on the damper plate (50) is not necessary. In this embodiment, the upper and / or the lower seal in the area of the cover screws is omitted.
  • the damper plate (50) Due to its rubber-elastic system on the vehicle body (5), the damper plate (50) acoustically decouples the vehicle body (5) from the chassis.
  • Figures 3-7 show variants of the shape and the fastening of the bolt (15) or the profiled pin and the cap (19) on the vehicle frame (5).
  • the bolt (15) is e.g. welded to the vehicle frame (5).
  • the bolt (15) can also be designed as a sleeve.
  • the cap (19) has a cylindrical inner bore (22).
  • the last third of the inner bore (22), seen from above, is designed as a threaded bore (21).
  • Figure 4 the pin (15) is screwed into a thread in the vehicle frame (5).
  • the pin (15) on the collar (17) is braced against the vehicle frame (5).
  • Figure 5 shows a screw (95) which is inserted from above through a hole (8) in the vehicle frame (5).
  • the screw (95) can have a special head shape.
  • the head (96) of the screw (95) is welded to the vehicle frame (5) from above.
  • the cap (19) is screwed onto the bolt (15) from below.
  • This cap (19) here has the same embodiment as in Figure 3.
  • the cap (19) is secured by tightening with the screw (95).
  • a screw nut (93) is welded to the vehicle frame (5).
  • the pin (15) is screwed into this.
  • the pin (15) can be designed with or without a collar. When the pin (15) is designed without a collar, the pin (15) is secured by tightening the pin (15) on the thread base. When the pin (15) is designed with a collar, the pin (15) is secured by tightening the shaft collar with the screw nut (93).
  • Figure 7 corresponds to Figure 6 with the difference that a weld nut (92) is attached to the top of the vehicle frame (5).
  • the pin (15) is e.g. by tack welding on the weld nut (92) or by cold forming the thread ends e.g. secured with the help of a special tool.

Landscapes

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

Abstract

L'invention concerne un élément de fixation (10) central pour un ressort à gaz pour véhicule (70), à symétrie de rotation, qui contient un soufflet présentant dans la zone de ses faces d'about, des alésages (52) ou des cavités centraux. Ledit élément de fixation est fixé sur la superstructure du véhicule (5), fait saillie hors de l'environnement du point de fixation et est entouré par les alésages ou les cavités. Ledit élément de fixation comprend un tenon profilé (15) ou un capuchon profilé (19). Le diamètre extérieur maximal du tenon ou du capuchon est au moins inférieur à un cinquième du diamètre extérieur maximal du soufflet de ressort à gaz.
EP02716694A 2001-02-14 2002-01-29 Element de fixation central pour ressort a gaz a symetrie de rotation Withdrawn EP1360432A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10106886 2001-02-14
DE10106886A DE10106886A1 (de) 2001-02-14 2001-02-14 Zentrales Befestigungselement für eine rotationssymmetrische Gasfeder
PCT/EP2002/000884 WO2002064993A2 (fr) 2001-02-14 2002-01-29 Element de fixation central pour ressort a gaz a symetrie de rotation

Publications (1)

Publication Number Publication Date
EP1360432A2 true EP1360432A2 (fr) 2003-11-12

Family

ID=7674032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02716694A Withdrawn EP1360432A2 (fr) 2001-02-14 2002-01-29 Element de fixation central pour ressort a gaz a symetrie de rotation

Country Status (4)

Country Link
US (1) US20080036125A1 (fr)
EP (1) EP1360432A2 (fr)
DE (1) DE10106886A1 (fr)
WO (1) WO2002064993A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637733B1 (en) * 2002-06-12 2003-10-28 Bfs Diversified Products, Llc Air spring with vibration isolation
EP1546573A1 (fr) 2002-08-30 2005-06-29 Freudenberg-NOK General Partnership Manchon a ressort pneumatique
DE102005014325B4 (de) * 2005-03-24 2008-03-13 Zf Friedrichshafen Ag Luftfederbein
DE102006005459A1 (de) 2006-02-07 2007-08-09 Continental Aktiengesellschaft Luftfeder mit Außenführung
EP2412999A1 (fr) * 2010-07-28 2012-02-01 Carl Freudenberg KG Support à amortissement hydraulique

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361575A (en) * 1941-10-13 1944-10-31 Builder Thompson Engineering A Suspension system for vehicles
GB779809A (en) * 1954-12-14 1957-07-24 Continental Gummi Werke Ag Improvements in or relating to pneumatic shock absorbers
DE1065668B (fr) * 1956-04-12
GB811328A (en) * 1959-02-06 1959-04-02 Dunlop Rubber Co Bellows device for fluid pressure
US3033554A (en) * 1960-09-26 1962-05-08 Gen Motors Corp Vacuum spring with disabling control
US3623339A (en) * 1969-11-28 1971-11-30 Ford Motor Co Bellows flexible joint
DE2060960C3 (de) * 1970-12-11 1980-04-30 Waggonfabrik Uerdingen Ag, Werk Duesseldorf, 4000 Duesseldorf Luftfederung für Schienenfahrzeuge mit wiegenlosem Drehgestell
US4564177A (en) * 1983-04-21 1986-01-14 The Firestone Tire & Rubber Company Clamp for non-beaded pneumatic assemblies
DE4006480A1 (de) * 1990-03-02 1991-09-05 Continental Ag Rollbalg-luftfeder mit einem schlauchrollbalg aus elastomerem werkstoff
US5342139A (en) * 1992-09-30 1994-08-30 Bridgestone/Firestone, Inc. Snap mounted attachment device
HU220550B1 (hu) * 1996-03-01 2002-03-28 The Goodyear Tire & Rubber Co. Szerelt légrugó és eljárás annak rögzítésére
US6109598A (en) * 1999-06-29 2000-08-29 Bridgestone/Firestone, Inc. Air spring bumper utilizing a combination of materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02064993A2 *

Also Published As

Publication number Publication date
WO2002064993A2 (fr) 2002-08-22
US20080036125A1 (en) 2008-02-14
WO2002064993A3 (fr) 2003-01-30
DE10106886A1 (de) 2002-09-05

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Inventor name: SCHEERER, HANS

Inventor name: GUSE, MICHAEL

Inventor name: BURSTEDDE, LUDGER

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