Shock absorber mounts for motor vehicles

Abstract

Damper mount (1) for mounting a shock absorber (6) in an air spring (20) for motor vehicles, comprising an elastomeric damping element (2) and a support disc (4), wherein the damper mount (1) is connectable to an air spring cover (21) via the damping element (2), wherein the support disc (4) is partially arranged in the damping element (2) and the support disc (4) comprises an inner recess for connection with a piston rod (5) of the shock absorber (6), wherein a means (10, 11, 17) is provided for receiving a gimbal-like movement of the piston rod (5), wherein the piston rod (5) is connected to the support disc (4) via the means (10, 11, 17), characterized in that the means (10, 11, 17) comprises at least one disc spring (10, 11) and a sliding sleeve (17), wherein the at least one disc spring (10, 11) rests against the outer contour of the sliding sleeve (17).

Description

[0001] The invention relates to a damper bearing according to the preamble of claim 1.

[0002] German patent DE 10229287 A1 discloses a damper mount for supporting shock absorbers in motor vehicles. The damper mount connects the shock absorber to the vehicle body. It essentially consists of a support disc and an elastomeric damping element. The support disc is embedded in the damping element and attached to the shock absorber. The damping element is, in turn, connected to the vehicle body. This design of the damper mount is intended to absorb the axial movement of the shock absorber and / or reduce the axial forces acting on the vehicle body. Lateral forces of the shock absorber can only be absorbed to a limited extent by the damper mount.

[0003] Air springs are increasingly being installed in motor vehicles. The shock absorber is located inside the air spring and is connected to the air spring cover via the damper mount. The air spring cover is then connected to the vehicle body. The damper mounting is particularly important for air springs designed for a high level of comfort. For comfort reasons, the requirements for such a damper mount in air springs necessitate highly flexible elastomeric damping elements, which must meet increasingly stringent requirements within ever-shrinking installation spaces. The forces that need to be transmitted result in a high specific load on the damper material. Furthermore, the gimbal forces reduce the effective area of ​​the working elastomeric damping element, meaning that these forces can only be partially absorbed. Consequently, these forces are transmitted to the vehicle body, leading to a loss of comfort.Instead of the ideally ring-shaped force transmission from the shock absorber via the support disc to the damping element, in extreme cases the force is introduced at a single point from the damping element into the air spring cover or the vehicle body. This overloads the elastomeric damping element and leads to component failure.

[0004] Therefore, the object of the invention is to provide an improved damper bearing for shock absorbers in motor vehicles, which makes it possible to better dampen the forces acting on a shock absorber and to reduce the transmission to the vehicle body.

[0005] The problem underlying the invention is solved by the features of the independent patent claim.

[0006] According to the invention, the damper bearing serves to support a shock absorber for motor vehicles. The damper bearing comprises an elastomeric damping element and a support disc, wherein the damper bearing can be connected to a vehicle body via the damping element. The support disc is partially arranged within the damping element and has an inner recess for connection to a piston rod of the shock absorber, the piston rod being connected to the support disc via a means for accommodating gimbal-like movement of the piston rod.

[0007] Preferably, the damper bearing for mounting the shock absorber is located inside an air spring, wherein the damper bearing is connected to an air spring cover via the damping element.

[0008] Preferably, the elastomeric damping element is designed as a ring, with the support disc being radially embedded in a groove within the damping element.

[0009] Preferably, the means for receiving a gimbal-like movement surrounds the piston rod completely within a limited piston area.

[0010] According to a preferred embodiment, the means comprises a sliding element or a deformable element.

[0011] Advantageously, the gimbal movements or forces acting on the piston rod of the shock absorber are absorbed via the means for accommodating the gimbal movement of the piston rod. This decouples the elastomeric damping element and relieves it of the burden of absorbing gimbal forces. As a result, an advantageous annular force transmission of the axial forces via the damping element is maintained by means of the means for accommodating the gimbal movement of the piston rod.

[0012] According to a preferred embodiment of the damper bearing, the means comprises a spherical bearing with a convex or concave outer contour as a sliding element.

[0013] Advantageously, the inner recess of the support disc has a concave inner contour that matches the convex outer contour of the spherical bearing. Alternatively, the inner recess of the support disc has a convex inner contour that matches the concave outer contour of the spherical bearing.

[0014] This allows for a movable or sliding bearing between the spherical bearing and the support disc. This has the advantage of enabling precise and direct movement of the piston rod within the bearing, thus preventing any twisting within the damper bearing.

[0015] Preferably, the spherical bearing and support disc are made of a metallic material or a plastic.

[0016] According to a further preferred embodiment of the damper bearing, the means comprises a sleeve and a deformable elastomer element, wherein the elastomer element is connected to the sleeve and the support disc.

[0017] Preferably, the elastomer element comprises the sleeve and is radially vulcanized together with the support disc and the sleeve.

[0018] Preferably, the damping element absorbs damping forces in the axial direction of the shock absorber, and the elastomer element absorbs the cardanic deflection of the shock absorber in a damping manner.

[0019] This design is advantageous for small cardan angles and can be manufactured cost-effectively. This is because, during cardan deflection, the elastomer element allows the sleeve to articulate relative to the support disc.

[0020] According to another preferred embodiment of the damper bearing, the means comprises at least one deformable disc spring.

[0021] Preferably, the means further comprises a sliding sleeve as a sliding element, wherein the at least one disc spring rests against the outer contour of the sliding sleeve.

[0022] It is also preferred that at least one disc spring is arranged in a contact position above the support disc and at least one disc spring is arranged in a contact position below the support disc.

[0023] Advantageously, several disc springs are arranged in parallel above and / or below the support disc.

[0024] Preferably, in the case of disc springs above the support disc, the inner edge is directed upwards, and in the case of disc springs below the support disc, the inner edge is directed downwards.

[0025] Disc springs ideally enable the transmission of high forces in the smallest possible installation space. At the same time, the disc springs have a centering effect on the support disc or piston rod, thus allowing for a cost-effective design. Disc springs also have the advantage that their characteristic curve is non-linear. With disc springs connected in parallel, the spring force increases steadily at low spring travel. This means that under extreme forces, such as those occurring when the strut bottoms out, the disc springs lose their elasticity and can therefore absorb higher forces.

[0026] The block size of the disc springs creates a travel limit, and the arrangement of disc springs with the support disc allows movement of the damper bearing, whereby, despite high forces, the support disc remains tensioned against the disc springs and no play occurs.

[0027] The disc springs are further advantageously designed in such a way that they can absorb axial forces and thus, together with the damping element, form part of the damper bearing characteristic curve of the entire damper bearing.

[0028] According to another preferred embodiment of the damper bearing, the means is frictionally attached to the piston rod by means of a damper nut.

[0029] Preferably, the spherical bearing, sleeve or sliding sleeve is fixed firmly in a recess of the piston rod.

[0030] Advantageously, the axially introduced forces of the shock absorber are introduced and absorbed directly into the elastomeric damping element by means of the force-fit connection of the damper nut via the means for accommodating cardanic movement of the piston rod by means of the support disc.

[0031] The damping bearing is used to mount shock absorbers against a vehicle body, preferably in air springs.

[0032] Further preferred embodiments of the invention will become apparent from the dependent claims and the following description of exemplary embodiments with reference to the figures.

[0033] They show

[0034] Fig. 1 a known damper bearing,

[0035] Fig. 2 a known damper bearing in an air spring module,

[0036] Fig. 3 an example damper bearing with a spherical bearing,

[0037] Fig. 4 an exemplary damper bearing with a spherical bearing in an air spring module,

[0038] Fig. 5 an exemplary damper bearing with an elastomer element in an air spring module,

[0039] Fig. 6 an exemplary damper bearing with disc springs in an air spring module and

[0040] Fig. 7 the exemplary damper bearing with disc springs in case of cardan deflection.

[0041] Fig. Figure 1 shows a known damper bearing 50 , wherein at a recess of the piston rod 5 and by means of a damper nut 14 support disc 4 is attached. 4 is partially located in a groove within the ring-shaped damping element 2 Recessed damping element 2 is via fastening devices 15 on vehicle body 3 Fixed. By means of a damping element. 2 axial forces on the piston rod 5 of the shock absorber onto the vehicle body 3 be reduced.

[0042] Furthermore, it shows Fig. 2 a known damper bearing 50 in an air spring module 20 . Air spring module 20 includes air spring cover 21 , Exterior 23 , air spring bellows22 , rolling piston 24 and additional spring 25 Shock absorbers 6 with piston rod 5 is via damping element 2 instead of using the vehicle body with air spring cover 21 connected. Air spring cover 21 can in turn be connected to the vehicle body.

[0043] Fig. Figure 3 shows an example damper bearing 1 . On piston rod 5 is a joint bearing 7 with convex outer contour by means of a damper nut 14 Attached to a joint bearing 7 The support disc is located there again 4 sliding and rotatable, with support disc 4 It has an inner recess with a suitably concave contour. Spherical bearing. 7 takes together with support disc 4 a gimbal deflection of the piston rod 5 on. Support disc 4 is in a groove inside the ring-shaped damping element 2recessed, which axial forces of the piston rod 5 or of the shock absorber. Likewise, the frictional connection of the spherical bearings is used. 7 and support disc 4 the axial forces of the piston rod 5 or of the shock absorber and absorbed into the damping element 2 guided.

[0044] In Fig. 4 is the example damper bearing 1 out of Fig. 3 in one air spring module 20 shown. The air spring module 20 Otherwise corresponds to the air spring module of the Fig. 2. Please refer to the description above.

[0045] Fig. Figure 5 shows an example damper bearing 1 with sleeve 8 and elastomer element 9 in the upper part of an air spring module 20 . sleeve 8 is by means of a damper nut 14 on piston rod 5 attached to the sleeve 8is radially encompassing elastomeric element 9 vulcanized and elastomeric element 9 is in turn located in an inner recess of the support disc 4 vulcanized sleeve 8 has a convex outer contour and support disc 4 The inner recess has a correspondingly concave contour. Elastomeric element 9 It is accordingly curved. This results in an advantageous movable and deformable bearing, because the sleeve twists during cardanic deflection. 8 opposite support disc 4 As a means of accommodating gimbal-like movement of the piston rod 5 Therefore, take the sleeve 8 and elastomer element 9 the gimbal deflection of the piston rod 5 on. Support disc 4 is in a groove inside the ring-shaped damping element 2 recessed, which reduces the axial forces of the piston rod 5or the shock absorber 6 records.

[0046] Fig. Figure 6 shows an example damper bearing 1 with disc springs 10 , 11 in the upper part of an air spring module 20 Above the support disc 4 are attached disc springs 10 arranged and below the support disc 4 are attached disc springs 11 arranged. The inner edge of the upper disc springs 10 is directed upwards, with the inner edge of the lower disc springs 11 is directed downwards. Thus, in this embodiment, there are above and below the support disc. 4 several disc springs 10 , 11 arranged in parallel. The ring-shaped disc springs 10 , 11 They lie on the inside against an outer contour of a sliding sleeve. 17 movable and sliding. Sliding sleeve 17 , upper disc spring 10, lower disc spring 11 and support disc 4 are by means of a damper nut 14 on piston rod 5 fastened. As a means of accommodating gimbal-like movement of the piston rod. 5 take upper and lower disc spring 10 , 11 the gimbal deflection of the piston rod 5 and simultaneously act to center the piston rod 5 Disc springs 10 , 11 In this design, they can absorb high forces and, due to their block dimensions, create a certain path limitation, in the case of the support disc. 4 compared to disc springs 10 , 11 remains under tension. Therefore, the upper and lower disc springs can... 10 , 11 together with damping element 2 axial forces of the piston rod 5 or of the shock absorber.

[0047] Fig. Figure 7 shows an example damper bearing 1 with disc springs10 , 11 with gimbal deflection 13 . This involves measuring the gimbal deflection 13 the piston rod 5 around the pivot point 16 opposite the non-displaced axis 12 the piston rod 5 Illustrated. Upper and lower disc spring. 10 , 11 enable the gimbal deflection 13 the piston rod 5 , while a force-fit connection between disc springs 10 , 11 and support disc 4 remains and yet in the inner recess of the support disc 4 sufficient play for the gimbal-like movement of the piston rod 5 remains. Reference symbol list 1 shock absorber bearing 2 damping elements 3 Vehicle body 4 Support disc 5 piston rod 6 shock absorbers 7 Joint bearings 8 Sleeve 9 Elastomeric element 10 Belleville washers 11 Belleville washer 12 Axis Piston Rod 13 gimbal deflection 14 Damper nut 15 Fastening 16 Pivot point 17 Sliding sleeve 20 air spring module 21 Air spring covers 22 air spring bellows 23 Exterior 24 rolling pistons 25 Additional spring 50 shock absorber bearings QUOTES INCLUDED IN THE DESCRIPTION

[0048] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0049] DE 10229287 A1

[0002]

Claims

[1] Damper bearing ( 1 ) for the mounting of a shock absorber ( 6 ), especially in an air spring ( 20 ), for motor vehicles, with an elastomeric damping element ( 2 ) and a support disc ( 4 ), whereby the damper bearing ( 1 ) via the damping element ( 2 ) with a vehicle body ( 3 ), especially with an air spring cover ( 21 ), connectable, wherein the support disc ( 4 ) partially in the damping element ( 2 ) is arranged and the support disc ( 4 ) an internal recess for connection with a piston rod ( 5 ) of the shock absorber ( 6 ) comprises, characterized by a means ( 7 , 8 , 9 , 10 , 11 , 17 ) to accommodate a gimbal-like movement of the piston rod, wherein the piston rod ( 5 ) via the means ( 7 , 8 , 9 ,10 , 11 , 17 ) with the support disc ( 4 ) is connected in storage. [2] Damper bearings ( 1 ) according to claim 1, characterized by that the means ( 7 , 8 , 9 , 10 , 11 , 17 ) the piston rod ( 5 ) surrounds. [3] Damper bearings ( 1 ) according to claim 1 or 2, characterized by that the medium is a sliding element ( 7 , 17 ) or a deformable element ( 9 , 10 , 11 ) includes. [4] Damper bearings ( 1 ) according to one of claims 1 to 3, characterized by that the means is a, in particular sleeve-shaped, joint bearing ( 7 ) with a convex or concave outer contour. [5] Damper bearings ( 1 ) according to claim 4, characterized by that the inner recess of the support disc ( 4) has a concave inner contour which matches the convex outer contour of the joint bearing ( 7 ) is, or that the inner recess of the support disc ( 4 ) has a convex inner contour which matches the concave outer contour of the joint bearing ( 7 ) is. [6] Damper bearings ( 1 ) according to one of claims 1 to 3, characterized by that the agent is a sleeve ( 8 ) with an elastomeric element ( 9 ) comprises, wherein the elastomeric element ( 9 ) with the sleeve ( 8 ) and the support disc ( 4 ) is connected. [7] Damper bearings ( 1 ) according to claim 6, characterized by that radially between the sleeve ( 8 ) and the support disc ( 4 ) the elastomeric element ( 9 ) is vulcanized on both sides. [8] Damper bearings ( 1 ) according to claim 6 or 7, characterized by that the damping element ( 2 ) in the axial direction of the shock absorber (5 ) absorbs forces in a damping manner and the elastomeric element ( 9 ) in cardanic deflection of the shock absorber ( 5 ) absorbs forces in a damping manner. [9] Damper bearings ( 1 ) according to one of claims 1 to 3, characterized by that the medium at least a disc spring ( 10 , 11 ) includes. [10] Damper bearing ( 1 ) according to claim 9 characterized by that the medium is a sliding sleeve ( 17 ) comprises, wherein the at least one disc spring ( 10 , 11 ) on the outer contour of the sliding sleeve ( 17 ) is pending. [11] Damper bearing ( 1 ) according to claim 9 or 10, characterized by that at least one Belleville spring ( 10 ) above the support disc ( 4 ), especially on the support disc ( 4 ) adjacent, arranged and that at least one disc spring ( 11 ) below the support disc ( 4 ), especially on the support disc ( 4) attached, is ordered. [12] Damper bearings ( 1 ) according to one of claims 9 to 11, characterized by that each contains several disc springs ( 10 , 11 ) are arranged in parallel above and / or below the support disc. [13] Damper bearings ( 1 ) according to any one of claims 1 to 12, characterized by that the joint bearing ( 7 ), the sleeve ( 8 ) or the sliding sleeve ( 17 ) by means of a damper nut ( 14 ) frictionally locked to the piston rod ( 5 ) is attached.

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