WO2023016748A1 - Ressort pneumatique - Google Patents

Ressort pneumatique Download PDF

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Publication number
WO2023016748A1
WO2023016748A1 PCT/EP2022/069874 EP2022069874W WO2023016748A1 WO 2023016748 A1 WO2023016748 A1 WO 2023016748A1 EP 2022069874 W EP2022069874 W EP 2022069874W WO 2023016748 A1 WO2023016748 A1 WO 2023016748A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixing element
latching
buffer
carrier plate
edge
Prior art date
Application number
PCT/EP2022/069874
Other languages
German (de)
English (en)
Inventor
David Rose
Stephan Dehlwes
Philipp Werner
Original Assignee
Vibracoustic Se
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 Vibracoustic Se filed Critical Vibracoustic Se
Priority to EP22744754.7A priority Critical patent/EP4384729A1/fr
Publication of WO2023016748A1 publication Critical patent/WO2023016748A1/fr

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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
    • F16F9/05—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 the flexible wall being of the rolling diaphragm type
    • F16F9/052—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 the flexible wall being of the rolling diaphragm type characterised by the bumper
    • 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
    • F16F2226/00—Manufacturing; Treatments
    • F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
    • F16F2226/041—Clipping

Definitions

  • the invention relates to an air spring according to the preamble of claim 1 .
  • Air springs are used with or without shock absorbers to cushion and dampen vibrations in a vehicle chassis. They usually include a rolling bellows which is attached to an air spring cover and a rolling piston, the rolling bellows delimiting an air-filled pressure chamber. In order to limit the adjustment path of the rolling piston in the longitudinal direction, buffers are used against which the air spring cover can strike.
  • an air spring is known from practice which comprises a buffer which is fixed to a support bolt of the rolling piston by means of a screw.
  • the screw carries the buffer.
  • applying the necessary tightening torque for the screw connection is cumbersome and not ultimately safe. Due to the buffer and/or the lack of space, gripping the screw is hardly possible or not possible at all, and gripping the buffer itself in order to apply the tightening torque there leads to a torsional load, which sometimes leads to damage to an adhesive zone between the buffer and the screw can.
  • fixations are problematic with regard to forces occurring during the ferry operation, since torsional loads can be introduced into the buffer. These torsional loads on the buffer can also be transferred to the screw and, in the worst case, can lead to the connection becoming loose.
  • the object of the invention is therefore to create an air spring which overcomes the problems of previously known air springs, in particular proposes a fixing option for the buffer which does not require the input of a torque during assembly.
  • an air spring through which a central longitudinal axis protrudes, comprising an end plate, a rolling piston with a fixing element, bellows, which stretches between the closing plate and the rolling piston and delimits a pressure chamber, and a stop buffer module, which is arranged at least in sections in the pressure chamber, comprising a elastomeric buffer and a carrier plate which carries the buffer, the stop buffer module being connected to the fixing element of the rolling piston via at least one connection, the connection being a clip connection, the buffer, the carrier plate and/or the fixing element having/having at least one latching means , Which has at least one locking projection to form the clip connection.
  • the at least one latching means can be clipped to at least one latching means to form the clip connection.
  • the invention proposes the use of a clip connection in order to clip the stop buffer module to the rolling piston.
  • the stop buffer module according to the invention can now be mounted or clipped along the central longitudinal axis in a simple manner. This also protects an adhesion zone between the buffer and the carrier plate. In addition, the carrier plate no longer has to hold any receiving elements for assembly tools.
  • the clip connection makes it possible, for example, for the stop buffer module to have a torsional degree of freedom in the assembled state, which reduces the load on the adhesion zone due to a torsional load on the buffer. Previous screw connections could not perform such a function. Finally, the clip connection allows radial loads to be carried despite the torsional degree of freedom can be initiated in the radial direction in the rolling piston due to locking means-related form fit.
  • the corresponding latching means can be designed in one piece, preferably monolithically, with a buffer, carrier plate or fixing element. This avoids material fractures and reduces the number of components and manufacturing costs.
  • a latching means on the buffer has the advantage that an undercut on the latching protrusion on the side of the latching means can easily be removed from the mold there by the tool. Demoulding a plastic part with an undercut is more difficult or impossible.
  • the latching projection can be an elevation or a hook, for example.
  • the corresponding latching means is to be provided on the stop buffer module, it can be provided on the buffer.
  • the latching means can, for example, form an elastomeric, radially acting stop on the outside or inside circumference.
  • the corresponding latching means is to be provided on the stop buffer module, it can be provided on the carrier plate. As a result, it is not the buffer itself that can be clipped, but the carrier plate. There is therefore a functional separation between the buffering by the buffer on the one hand and the carrying and clipping by the carrier plate on the other hand. As a result, stops of the end plate on the buffer only have an indirect effect on the latching means(s). A deformation of the buffer by a stop thus does not deform the latching means in a direction out of the clip connection.
  • the buffer can be free of locking means, which makes it cheaper to manufacture and increases the design options.
  • the buffer can alternatively or additionally be free of support on the outer circumference side.
  • the buffer is then not supported with its outer peripheral side on an element arranged radially thereto. This leads to sufficient mobility and deformability of the buffer in the radial direction and simple assembly. Sufficient stability can be imparted to the buffer by the support plate.
  • the carrier plate can be supported on an adjacent component on the inside and/or outside circumference in order to stabilize the stop buffer module.
  • a final, connecting arrangement of the stop buffer module on the rolling piston is to be understood as the assembly state of the stop buffer module.
  • the buffer and the carrier plate can be firmly connected to each other, preferably cohesively, preferably with by vulcanization.
  • the support plate can be a support structure.
  • the carrier plate carries the buffer and can stabilize it.
  • the adhesive zone is formed between the buffer and the carrier plate.
  • the buffer is advantageously an elastomer buffer in order to dampen impacts of the end plate in a way that is gentle on the system.
  • known buffers made of hard plastic act as overload protection and are less gentle on the system, since hard impacts can occur there.
  • the end plate can be an air spring cover.
  • the fixing element can be a fixing plate.
  • the fixing element can additionally or alternatively be connected to the rolling piston, preferably in a rotationally fixed manner.
  • the fixing element can additionally or alternatively be connected to the rolling piston, preferably in a rotationally fixed manner.
  • the clip connection can additionally or alternatively be formed with the fixing element.
  • the air spring thus advantageously has a selected structure for fixing.
  • the fixing element can additionally or alternatively be disc-shaped and/or a fixing plate that is rotationally symmetrical to the central longitudinal axis.
  • the plate-like design saves installation space and the at least one latching means can easily be gripped around it.
  • the rotational symmetry simplifies assembly and can allow the bump stop module to rotate freely.
  • the fixing element can be arranged inside the rolling piston in a piston interior in order to obtain a compact design.
  • the buffer, the carrier plate and/or the fixing element can comprise at least one latching means as a latching partner for the at least one latching means, with which the at least one latching projection is clipped.
  • the latching means is not arranged on that element on which the latching means is arranged.
  • At least one latching means can be arranged on the stop buffer module and the corresponding latching means can be arranged on the fixing element, or vice versa.
  • At least one latching means can be arranged on the buffer and the corresponding latching means can be arranged on the fixing element, or vice versa.
  • At least one latching means can be arranged on the carrier plate and the corresponding latching means can be arranged on the fixing element, or vice versa.
  • the production costs can be adjusted, with the at least one latching means preferably being arranged on the component which can be produced more cost-effectively.
  • the division of locking means and locking means within a locking area on different components is also advantageous.
  • a latching area includes all latching means and latching means that can be latched together. If, for example, locking means were arranged on both components clipped together within a locking area, the locking means of the stationary component would serve as a stop and, for example, prevent the stop buffer module from rotating freely about the central longitudinal axis.
  • the latching means can have at least one edge, which from the latching means, in particular its Latching projection, is gripped or gripped to produce a latching form fit.
  • the bump stop module can thus be attached to the rolling piston without the interposition of further elements.
  • the clip connection can thus be produced from the at least one latching means and the corresponding at least one latching means.
  • the latching means can firmly clip the stop buffer module in the longitudinal direction. A movement of the stop buffer module in the longitudinal direction with the existing clip connection is then no longer possible. Such a design stabilizes the bump stop module.
  • the at least one latching means can rest against a corresponding latching partner or at least enclose it in a form-fitting manner. It is conceivable that the fixed clipping in the longitudinal direction takes place exclusively through the latching means(s) and the corresponding latching means(s).
  • the latching means can be at least one recess running in the longitudinal direction and/or at least one through-opening running in the longitudinal direction and/or an outer latching edge and/or an inner latching edge.
  • the at least one latching means can be arranged on the outer edge or outer circumference or on the inner edge or inner circumference or at a radial distance from an outer circumference of the corresponding carrier plate or fixing element.
  • the recess or through opening can be arranged in the buffer, the carrier plate and/or the fixing element.
  • the recess can be circular or the through-opening can be cylindrical in order to enable the stop buffer module to rotate about the central longitudinal axis.
  • the outer locking edge can be arranged on the outer circumference and can be gripped from behind by at least one locking means on the outer circumference.
  • the fixing element preferably has the outer locking edge on the outer circumference and/or the inner locking edge on the inner circumference.
  • the respective outer latching edge can run in a circle when viewed in the longitudinal direction.
  • the advantage of the outer locking edge is the large area on which the clip connection can be formed in order to distribute the forces that occur as best as possible.
  • the inner locking edge can be arranged on the inner circumference and the at least one locking means can engage behind it on the inner circumference. Viewed in the longitudinal direction, the respective inner latching edge can extend in a circular manner. The advantage here is that the outside area can remain free of locking means in order to achieve a compact design.
  • the outer locking edge can be an abutting edge between an outer peripheral edge, for example the outer rastrandes, and a surface, for example, of the fixing means, which faces towards or away from the buffer.
  • the inner locking edge can be an abutting edge between an inner peripheral edge, for example the inner locking edge, and a surface, for example of the fixing means, which faces towards or away from the buffer.
  • the at least one latching means can be designed and/or arranged geometrically in such a way that the stop buffer module can be rotated relative to the fixing element, preferably rotatable with respect to the central longitudinal axis.
  • the fixing element can advantageously guide the stop buffer module.
  • the at least one latching means or its latching projection can lie, for example, on an imaginary latching projection circle whose center can coincide with the center of a corresponding imaginary latching means circle on which the at least one latching means can lie. It is conceivable that these shapes are the same on both sides of the buffer/carrier plate on the one hand and the fixing element on the other.
  • the advantage of the circular shape lies in its independence of direction.
  • the bump stop module can assume any position relative to the rolling piston.
  • the latching means can comprise either an unsegmented latching ring or a plurality of latching lugs which are either arranged adjacent to one another in the circumferential direction or are each arranged with at least one intermediate limiting lug.
  • the locking ring or the locking tabs can encompass the locking projection on the inner or outer circumference as an elevation or hook for locking.
  • the locking ring or the locking tabs can extend in the longitudinal direction.
  • the detent ring acts stiffly in ferry operation, and the detent lugs can also react flexibly to radial forces.
  • the locking ring is preferred for transmitting the radial forces
  • further fixing means for example in the form of a clip, could advantageously be provided in the optional recess or through-opening or central recess as a safeguard against loss.
  • the radial forces that occur would be primarily transmitted through the locking ring.
  • the latching tabs can be evenly spaced from one another to allow for an even distribution of stress.
  • At least one delimiting tab can be arranged between adjacent locking tabs, which is free of locking projections and/or can be more rigid than the locking tabs.
  • the limiting tab(s) can extend in the longitudinal direction, preferably parallel to the central longitudinal axis.
  • the limiting tab(s) serves to relieve the locking tabs when radial forces occur.
  • the limiting tab(s) can be designed to be more resistant to bending than the latching means(s).
  • the limiting tab(s) can/are able to reliably guide the stop buffer module in the circumferential direction.
  • the limiting tab(s) can/can bear on a component on the inside and/or outside circumference, preferably on the fixing element. As a result, the limiting tab(s) can also guide the stop buffer module without play in the circumferential direction.
  • the limiting tab(s) can have a radial spacing on the inner and/or outer circumference of a component, preferably the fixing element, when it/they are arranged on the buffer and/or the carrier plate, or can be in contact there.
  • a clearance or transition fit can be formed, in which case the limiting tab(s) can be rotatable relative to the other component if there is sufficient radial force. As a result, there is no excessive friction that counteracts the rotation of the bump stop module.
  • the functions can be separated by means of a limiting tab(s). While the limiting tab(s) is/are used for secure guidance in the circumferential direction, the latching element can neglect this guiding function and only serve for clipping.
  • the latching element can also be pretensioned in a simplified manner or tensioned by the clip connection.
  • the limiting tab(s) can have a larger angular width or width in the circumferential direction with respect to the central longitudinal axis than the latching tab(s).
  • the ratio can be in the range from 10:1 to 2:1, preferably in the range from 8:1 to 3:1, more preferably 4:1. These conditions have proven to be particularly advantageous with regard to the separation of functions described.
  • the latching means can comprise a latching socket.
  • the locking piece can include the locking projection on the outer circumference as an elevation or hook for locking.
  • the locking piece can be designed in the shape of a solid cylinder and/or extend in the longitudinal direction, preferably coaxially to the central longitudinal axis.
  • an outer locking edge or an inner locking edge can have a contact surface for the at least one locking means, which is preferably a surface of revolution.
  • This also enables a rotational movement of the stop buffer module and, thanks to the system, circular guidance without transverse movements of the stop buffer module.
  • the at least one latching means can lean against and support this contact surface in order to prevent or counteract a displacement of the stop buffer module in the radial direction. Leaning and supporting can also be done under pretension or tension caused by the clip connection.
  • the surface of the outer locking edge can be delimited at least in sections by the outer locking edge.
  • the surface of the inner locking edge can be delimited at least in sections by the inner locking edge.
  • the fixing element can include the outer locking edge, preferably the outer locking edge is the outer peripheral surface of the fixing element.
  • the fixing element can include the inner locking edge, preferably the inner locking edge is the inner peripheral surface of the fixing element.
  • the air spring according to the invention either - in one configuration of at least one latching means arranged on the inner edge or inner circumference or at a radial distance from an outer circumference of the buffer, the carrier plate or the fixing element, a web edge can also be formed on the buffer, the carrier plate or the fixing element on the outer edge or outer circumference can be arranged on the outer edge or outer circumference of the respective other component of the carrier plate or fixing element, or
  • the support plate or the fixing element arranged at least one latching means additionally on the buffer, the support plate or the fixing element with a radial distance to an outer edge or outer circumference of the buffer, the support plate or the fixing element be formed a web edge.
  • the edge of the web can be ring-shaped or cylindrical and/or can extend in the longitudinal direction.
  • the web edge is used for stability against radial forces on the bump stop module, since it can be supported against the other component.
  • the edge of the web can have a continuous hollow cylindrical shape.
  • the web edge serves to relieve the locking tabs when radial forces occur.
  • the edge of the web can be designed to be more rigid than the latching means(s). As a result, the edge of the web can reliably guide the stop buffer module in the circumferential direction.
  • the web edge can rest against a component on the inside and/or outside circumference, preferably against the fixing element. As a result, the web edge can also guide the stop buffer module without play in the circumferential direction.
  • the web edge can have a radial spacing from or rest against a component, preferably the fixing element if it is arranged on the buffer and/or the carrier plate.
  • a clearance or transition fit can be formed, in which case the web edge can be rotatable relative to the other component if there is sufficient radial force.
  • Functions can be separated by means of a web edge. While the edge of the web is used for reliable guidance in the circumferential direction, the latching element can neglect this guiding function and only serve for clipping. As a result, the latching element can also be pretensioned in a simplified manner or tensioned by the clip connection.
  • the carrier plate or the fixing element have a central recess which is preferably continuous in the longitudinal direction, wherein the central recess can comprise the at least one latching means and the web edge can be arranged on the outer edge or outer circumference of the carrier plate or the fixing element, or -
  • the carrier plate or the fixing element have a central recess, which is preferably continuous in the longitudinal direction, wherein the outer edge or the outer circumference of the carrier plate or the fixing element comprise the at least one latching means and the web edge can protrude into the central recess.
  • the central recess can be the recess or through-opening. With this configuration, the central recess can advantageously interact with the web edge in order to be able to transmit further radial forces. This is because the edge of the web can be supported on the peripheral side in the central recess.
  • the carrier plate can be made of plastic material.
  • the carrier plate can be provided, for example, in a simple manner with a latching means and/or a web edge and/or a recess/through-opening/central recess.
  • the carrier plate does not have to be able to transmit tightening torques to a screw connection, so that a light and inexpensive material can be selected for it.
  • the buffer can be an elastomeric buffer and can be integrally connected to the carrier plate. In between, the adhesion zone is formed.
  • the carrier plate can have an elastomeric body on its side facing away from the buffer, which is preferably formed monolithically with the buffer.
  • the elastomeric body can introduce a longitudinally acting bias into the clip connection and serve to compensate for dimensional tolerances.
  • the elastomeric body can be an elastomeric layer or an elastomeric ring.
  • the rolling piston can comprise a carrier cylinder which is connected, preferably welded, to the rolling piston.
  • the carrier cylinder can carry the fixing element. Since, for example, carrier cylinders of different lengths can be used, the air spring can have a modular structure and be designed according to requirements.
  • the support plate and/or the fixing element can be designed as a disk/disks that are rotationally symmetrical with respect to the central longitudinal axis.
  • Such a configuration is used in particular for the relative rotatability of the stop buffer module with respect to the rolling piston.
  • the fixing element can be used as Fixing plate be formed. As a result, a large adhesive surface can be formed for the buffer, which avoids local stresses as best as possible.
  • the at least one latching means can be flexible in the radial direction; the at least one latching means preferably has a pretension in the radial direction and/or is tensioned by the clip connection. As a result, a displacement of the stop buffer module in the radial direction can be prevented or counteracted.
  • FIG. 1 shows a longitudinal sectional view of an air spring according to the invention
  • FIG. 3 shows a second embodiment of a stop buffer module
  • FIG. 5 shows a fourth embodiment of a stop buffer module
  • FIG. 7 shows a sixth embodiment of a stop buffer module
  • FIG. 1 shows an air spring 2 through which a central longitudinal axis A protrudes in its longitudinal direction L.
  • a radial direction R of the air spring 2 is plotted at right angles to the central longitudinal axis A and starting therefrom.
  • a circumferential direction U runs around the central longitudinal axis A.
  • the air spring 2 comprises an end plate 4 as an air spring cover and a rolling piston 6.
  • a bellows 8 spans between the end plate 4 and the rolling piston 6.
  • the bellows 8 delimits a gas-filled pressure chamber 10 and can roll on an outer peripheral surface of the rolling piston 6 .
  • the rolling piston 6 has a hollow-cylindrical carrier cylinder 38 which is arranged coaxially to the central longitudinal axis A.
  • the rolling piston 6 comprises a fixing element in the form of a fixing plate 18 which is rotationally symmetrical with respect to the central longitudinal axis A and is disk-shaped.
  • the fixing plate 18 is fastened to the end of the carrier cylinder 38 facing the closing plate 4 .
  • the rolling piston 6 and its elements are connected to one another in a torque-proof manner.
  • a stop buffer module 12 is arranged, against which the end plate 4 can strike in a known manner when the bellows 8 is resiliently compressed.
  • the bump stop module 12 is shown in the assembled state.
  • the stop buffer module 12 comprises only two components here, namely an elastomeric buffer 14 and a support structure in the form of a support plate 16 made of a plastic material.
  • the carrier plate 16 has a disk shape that is rotationally symmetrical with respect to the central longitudinal axis A.
  • the carrier plate 16 carries the longitudinally trapezoidal buffer 14 and rests either directly or indirectly on the fixing plate 18 via an intermediate elastomeric body.
  • the buffer 14 is integrally connected to the carrier plate 16, with a bonding zone being formed in between.
  • the buffer 14 has a free space on the outer peripheral side, ie it is not supported with its outer peripheral side on an element arranged radially thereto.
  • the stop buffer module is connected to the fixing plate 18 via a clip connection.
  • the form-fitting clip connection is produced from at least one latching means 20 and a corresponding latching means 44.
  • Latching means 20 and latching means 44 can be arranged on various components, with the embodiments shown here by no means being final.
  • the stop buffer module 12 includes the latching means 20 and the latching means 44 corresponding to the fixing plate 18.
  • the latching means 20 are each designed as latching tabs 22 with latching projections 24 protruding inward in the radial direction R.
  • the buffer 14 is therefore free of locking means.
  • the latching tabs 22 are monolithic with the carrier plate 16 and extend in the longitudinal direction L.
  • the latching means 44 is designed as a circular outer latching edge 27 viewed in the longitudinal direction, which is formed on the outer circumference of the fixing plate 18 and delimits an outer latching edge 26.
  • the latching tabs 22 extend in the longitudinal direction L along the outer latching edge 26, with their latching projections 24 engaging behind the outer latching edge 27 in a form-fitting manner.
  • the stop buffer module 12 is thus clipped to the rolling piston 6 .
  • FIGS. 2 to 7 now show various further configurations. In order to avoid repetition, therefore, only the differences from FIG. 1 will be described.
  • the latching means 20 is monolithic with the carrier plate 16 and is designed as a continuous or unsegmented latching ring 32 on the outer circumference.
  • the locking ring 32 extends in the longitudinal direction L, being flexible at least in the radial direction R in such a way that it can be clipped.
  • the likewise continuous or unsegmented latching projection 24 is designed as a hook and protrudes inward in the radial direction R and engages behind.
  • the latching means 20 extends along an imaginary circle of latching projections viewed in the longitudinal direction.
  • the locking ring 32 clips the stop buffer module 12 firmly in the longitudinal direction L.
  • the stop buffer module 12 can be rotated relative to the fixing plate 18 with respect to the central longitudinal axis A.
  • the fixing plate 18 has the outer locking edge 27 on the outer locking edge 26 as the locking means 44 .
  • the outer latching edge 27 is an abutting edge between the outer latching edge 26 and a surface of the fixing plate 18 that faces away from the buffer 14 .
  • the latching means 20 and the latching means 44 are divided into different components within a latching area 46 .
  • the fixing plate 18 has a contact surface 30 for the locking means 20 .
  • the locking ring 32 has a contact surface 31 for the fixing element.
  • the two contact surfaces 30, 31 are in continuous contact with one another in the circumferential direction U, but do not have to be. Both contact surfaces 30, 31 are surfaces of revolution.
  • the fixing plate 18 Centrally and coaxially to the central longitudinal axis A, the fixing plate 18 has a circular central recess 40 .
  • the carrier plate 16 has a central web edge 34 which is aligned coaxially with the central longitudinal axis A and is of hollow-cylindrical design.
  • the web edge 34 protrudes in the longitudinal direction L from the side of the carrier plate 16 facing away from the buffer 14 .
  • the web edge 34 is arranged at a radial distance from the outer circumference of the carrier plate 16 .
  • the web edge 34 extends through the central recess 40, where it bears against the fixing plate 18 in a rotatable manner.
  • the web edge 34 in the central recess 40 assumes the guiding function in the circumferential direction U and a holding function in the radial direction R, and the locking ring 32 assumes the fixing function in the longitudinal direction L, thereby realizing a functional separation.
  • FIG. 2 An embodiment similar to that of FIG. 2 is shown in FIG.
  • the guiding function in the circumferential direction U and the clipping function are fulfilled by the locking ring 32 .
  • the latching means 20 is monolithic with the carrier plate 16 .
  • the latching means 20 comprises a plurality of latching lugs 22 arranged in the circumferential direction U, each with an intermediate limiting lug 23.
  • a longitudinal gap is formed between adjacent lugs 22, 23.
  • the tabs 22, 23 extend in the longitudinal direction L, the latching tabs 22 being more flexible than the limiting tabs 23 in the radial direction R.
  • the limiting tabs 23 are thus more rigid.
  • Each delimiting tab 23 has no snap-in projection and each snap-in tab 22 has a snap-in projection 24 as a hook, which projects inward in the radial direction R and projects behind.
  • the latching means 20 extends along an imaginary circle of latching projections viewed in the longitudinal direction.
  • the locking tabs 22 clip the stop buffer module 12 firmly in the longitudinal direction L.
  • the stop buffer module 12 can be rotated relative to the fixing plate 18 with respect to the central longitudinal axis A.
  • the fixing plate 18 has the outer locking edge 27 on the outer locking edge 26 as the locking means 44 .
  • the outer latching edge 27 is an abutting edge between the outer latching edge 26 and a surface of the fixing plate 18 that faces away from the buffer 14 .
  • the latching means 20 and the latching means 44 are divided into different components within a latching area 46 .
  • the fixing plate 18 has a contact surface 30 for the locking means 20 .
  • the locking tabs 22 have a contact surface 31 for the fixing element.
  • the two abutment surfaces 30, 31 are in continuous contact with one another in the circumferential direction U. Both contact surfaces 30, 31 are surfaces of revolution.
  • the limiting tabs 23 are in contact with the outer latching edge 26 or the contact surface 30 so that the stop buffer module 12 can be rotated about the central longitudinal axis A.
  • the limiting tabs 23 are thus arranged at a radial distance from the fixing plate 18 . It can be seen that the ratio of the angular width between the delimiting tabs 23 and the latching tabs 22 is approximately 4:1.
  • the latching means 20 is designed monolithically with the carrier plate 16 and as a continuous or unsegmented latching ring 32.
  • the locking ring 32 is arranged at a radial distance from the outer circumference of the carrier plate 16 .
  • the locking ring 32 extends in the longitudinal direction L, being flexible at least in the radial direction R in such a way that it can be clipped.
  • the likewise continuous or unsegmented latching projection 24 is designed as a hook and protrudes outwards in the radial direction R and engages behind.
  • the latching means 20 extends along an imaginary circle of latching projections viewed in the longitudinal direction.
  • the locking ring 32 clips the stop buffer module 12 firmly in the longitudinal direction L.
  • the stop buffer module 12 can be rotated relative to the fixing plate 18 with respect to the central longitudinal axis A.
  • the fixing plate 18 has an inner locking edge 29 on the inner locking edge 28 as the locking means 44 .
  • the inner latching edge 29 is an abutting edge between the inner latching edge 28 and a surface of the fixing plate 18 which faces away from the buffer 14 .
  • the latching means 20 and the latching means 44 are divided into different components within a latching area 46 .
  • the fixing plate 18 has a contact surface 30 for the latching means 20 on the inner circumference.
  • the locking ring 32 has a contact surface 31 for the fixing element.
  • the two abutment surfaces 30, 31 are in continuous contact with one another in the circumferential direction U. Both contact surfaces 30, 31 are surfaces of revolution.
  • the fixing plate 18 Centrally and coaxially to the central longitudinal axis A, the fixing plate 18 has a circular central recess 40 .
  • the carrier plate 16 has a web edge 34 on the outer circumference and aligned coaxially to the central longitudinal axis A, which is designed as a hollow cylinder.
  • the web edge 34 protrudes in the longitudinal direction L from the side of the carrier plate 16 facing away from the buffer 14 .
  • the web edge 34 extends on the outer circumference of the fixing plate 18 in the longitudinal direction L, bearing against the fixing plate 18 on the outer circumference in order to perform a guiding function in the circumferential direction U and a holding function in the radial direction R.
  • the latching means 20 is monolithic with the buffer 14 and is designed as a continuous or unsegmented latching ring 32 on the outer circumference.
  • the locking ring 32 extends in the longitudinal direction L, being flexible at least in the radial direction R in such a way that it can be clipped.
  • the likewise continuous or unsegmented latching projection 24 is designed as a hook and protrudes inward in the radial direction R and engages behind.
  • the latching means 20 extends along an imaginary circle of latching projections viewed in the longitudinal direction.
  • the locking ring 32 clips the stop buffer module 12 firmly in the longitudinal direction L.
  • the stop buffer module 12 can be rotated relative to the fixing plate 18 with respect to the central longitudinal axis A.
  • the fixing plate 18 has the outer locking edge 27 on the outer locking edge 26 as the locking means 44 .
  • the outer latching edge 27 is an abutting edge between the outer latching edge 26 and a surface of the fixing plate 18 that faces away from the buffer 14 .
  • the latching means 20 and the latching means 44 are divided into different components within a latching area 46 .
  • the fixing plate 18 has a contact surface 30 for the locking means 20 .
  • the locking ring 32 has a contact surface 31 for the fixing element.
  • the two abutment surfaces 30, 31 are in continuous contact with one another in the circumferential direction U. Both contact surfaces 30, 31 are surfaces of revolution.
  • the fixing plate 18 has a circular central recess 40 .
  • the carrier plate 16 has a central web edge 34 which is aligned coaxially with the central longitudinal axis A and is of hollow-cylindrical design.
  • the web edge 34 protrudes in the longitudinal direction L from the side of the carrier plate 16 facing away from the buffer 14 .
  • the web edge 34 is arranged at a radial distance from the outer circumference of the carrier plate 16 .
  • the web edge 34 extends through the central recess 40, where it bears against the fixing plate 18 in order to radially secure the buffer module 12 and to support it so that it can rotate in the circumferential direction U.
  • the latching means 20 extends in the longitudinal direction L along the carrier plate 16 and the fixing plate 18 in order to then reach under the fixing plate 18 .
  • the latching means 20 is designed monolithically with the buffer 14 and as a latching socket 33 in the form of a solid cylinder.
  • the locking piece 33 is arranged coaxially to the central longitudinal axis A.
  • the locking connector 33 extends in the longitudinal direction L, being flexible at least in the radial direction R in such a way that it can be clipped.
  • the continuous or unsegmented latching projection 24 is designed as a hook and protrudes outwards in the radial direction R and engages behind.
  • the latching means 20 extends along an imaginary circle of latching projections viewed in the longitudinal direction.
  • the locking socket 33 clips the stop buffer module 12 firmly in the longitudinal direction L.
  • the stop buffer module 12 can be rotated relative to the fixing plate 18 with respect to the central longitudinal axis A.
  • the fixing plate 18 has the inner locking edge 29 on the inner locking edge 28 as the locking means 44 .
  • the inner latching edge 29 is an abutting edge between the inner latching edge 28 and a surface of the fixing plate 18 which faces away from the buffer 14 .
  • the latching means 20 and the latching means 44 are divided into different components within a latching area 46 .
  • the fixing plate 18 has a contact surface 30 for the latching means 20 on the inner circumference.
  • the latching socket 33 has a contact surface 31 for the fixing element.
  • the two abutment surfaces 30, 31 are in continuous contact with one another in the circumferential direction U.
  • Both contact surfaces 30, 31 are surfaces of revolution.
  • the fixing plate 18 Centrally and coaxially to the central longitudinal axis A, the fixing plate 18 has a circular central recess 40 .
  • the carrier plate 16 also has a circular central recess 40 in the center and coaxially to the central longitudinal axis A, so that the elastomer of the buffer 14 can flow through this hole during manufacture and form the connecting piece 33 .
  • the two central recesses 40 have the same diameter and are coaxial with one another.
  • the two central recesses 40 form a through opening 42 .
  • the carrier plate 16 has a web edge 34 on the outer circumference and aligned coaxially to the central longitudinal axis A, which is designed as a hollow cylinder.
  • the web edge 34 protrudes in the longitudinal direction L from the side of the carrier plate 16 facing away from the buffer 14 .
  • the web edge 34 extends on the outer peripheral side of the fixing plate 18 in the longitudinal direction L and rests there, so that the stop buffer module 12 can be rotated.

Landscapes

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

Abstract

L'invention concerne un ressort pneumatique à travers lequel un axe longitudinal central (A) dépasse, comprenant une plaque de terminaison (4), un piston rotatif (6) avec un élément de fixation, un lobe rotatif (8) qui est tendu entre la plaque de terminaison (4) et le piston rotatif (6) et délimite une chambre de pression (10), et un module tampon d'arrêt (12) qui est disposé au moins par endroits dans la chambre de pression (10), comprenant un tampon élastomère (14) et une plaque de support (16) qui supporte le tampon (14), le module tampon d'arrêt (12) étant relié par l'intermédiaire d'au moins une liaison à l'élément de fixation du piston rotatif (6), la liaison étant une liaison par encliquetage, le tampon (14), la plaque de support (16) et/ou l'élément de fixation présentent au moins un moyen de verrouillage (20) qui comprend au moins une saillie de verrouillage (24) pour former la liaison par encliquetage.
PCT/EP2022/069874 2021-08-12 2022-07-15 Ressort pneumatique WO2023016748A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22744754.7A EP4384729A1 (fr) 2021-08-12 2022-07-15 Ressort pneumatique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021121053.4 2021-08-12
DE102021121053.4A DE102021121053A1 (de) 2021-08-12 2021-08-12 Luftfeder

Publications (1)

Publication Number Publication Date
WO2023016748A1 true WO2023016748A1 (fr) 2023-02-16

Family

ID=82656347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/069874 WO2023016748A1 (fr) 2021-08-12 2022-07-15 Ressort pneumatique

Country Status (3)

Country Link
EP (1) EP4384729A1 (fr)
DE (1) DE102021121053A1 (fr)
WO (1) WO2023016748A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0943836A2 (fr) * 1998-03-12 1999-09-22 BRIDGESTONE/FIRESTONE, Inc. Extension pour un pare-chocs d'un ressort pneumatique
EP0969224A1 (fr) * 1998-06-30 2000-01-05 BRIDGESTONE/FIRESTONE, Inc. Un pare-choc métallique/élastomerique pour ressorts pneumatiques
US20130093132A1 (en) * 2010-04-26 2013-04-18 Firestone Industrial Products Company, Llc Gas spring assembly and method of assembling same
US20180187740A1 (en) * 2016-12-30 2018-07-05 Firestone Industrial Products Company, Llc Jounce bumper assemblies as well as gas spring assemblies including same
US20190126707A1 (en) * 2016-04-19 2019-05-02 Volvo Truck Corporation Air suspension arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5212875Y2 (fr) 1970-11-28 1977-03-23
ITTO20040049U1 (it) 2004-04-16 2004-07-16 C F Gomma Spa Pistone di una molla ad aria di un autoveicolo provvista di un tampone
EP2156068B1 (fr) 2007-04-09 2015-08-26 BFS Diversified Products, LLC Ensemble de ressort pneumatique et procédé
US9140327B2 (en) 2012-08-31 2015-09-22 Firestone Industrial Products Company, Llc End member assemblies and gas spring assemblies including same
US10005333B2 (en) 2013-05-28 2018-06-26 Firestone Industrial Products Company, Llc End member assemblies and travel-restraint assemblies as well as gas spring assemblies including same
DE102016100939B4 (de) 2016-01-20 2023-08-10 Vibracoustic Cv Air Springs Gmbh Luftfeder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0943836A2 (fr) * 1998-03-12 1999-09-22 BRIDGESTONE/FIRESTONE, Inc. Extension pour un pare-chocs d'un ressort pneumatique
EP0969224A1 (fr) * 1998-06-30 2000-01-05 BRIDGESTONE/FIRESTONE, Inc. Un pare-choc métallique/élastomerique pour ressorts pneumatiques
US20130093132A1 (en) * 2010-04-26 2013-04-18 Firestone Industrial Products Company, Llc Gas spring assembly and method of assembling same
US20190126707A1 (en) * 2016-04-19 2019-05-02 Volvo Truck Corporation Air suspension arrangement
US20180187740A1 (en) * 2016-12-30 2018-07-05 Firestone Industrial Products Company, Llc Jounce bumper assemblies as well as gas spring assemblies including same

Also Published As

Publication number Publication date
EP4384729A1 (fr) 2024-06-19
DE102021121053A1 (de) 2023-02-16

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