Rubber elastic bearing for a drive unit in a motor vehicle

Abstract

A rubber elastic bearing for securing a drive unit in a motor vehicle in an uncoupled manner. The bearing can be assembled between as housing of a drive unit and a support component, and the bearing can be held at least indirectly in the support component in a form-fitting manner. A joining aid for the bearing is provided such that a secure joint of the form-fitting connection with the support component can be achieved.

Claims

1. A rubber-elastic bearing configured for decoupled fastening of a drive unit, in a motor vehicle, the rubber-elastic bearing comprising: a closed recess; and an interlocking connection configured to interlockingly hold the rubber-elastic bearing in a carrier component, wherein the rubber-elastic bearing is installed between a housing of the drive unit and the carrier component, wherein the interlocking connection is formed by a joining aid, wherein the joining aid extends into the closed recess at least in regions, wherein the joining aid ends at a distance from one end of the recess, wherein the distance corresponds to an elasticity of the rubber-elastic bearing such that elasticity of the rubber-elastic bearing is not restricted by the joining aid to allow maximal deformation of the rubber-elastic bearing, wherein the joining aid further ends within the recess at a second distance from the interlocking connection, wherein a side wall of the joining aid is spaced from an inner side wall of the rubber-elastic bearing defining the recess.

2. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing has indentations at least in regions, wherein the recess extends into a region of the indentation.

3. The rubber-elastic bearing according to claim 1, wherein a geometric shape of an end of the recess cooperates with a corresponding geometric shape of the joining aid.

4. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing is deformable.

5. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing is mounted in the housing between a first housing part and a second housing part.

6. The rubber-elastic bearing according to claim 5, wherein the joining aid is integral with the second housing part.

7. The rubber-elastic bearing according to claim 1, wherein the joining aid is integral with the rubber-elastic bearing.

8. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing has a connection element.

9. The rubber-elastic bearing according to claim 2, wherein the indentations are radial grooves.

10. The rubber-elastic bearing according to claim 8, wherein the connection element has an accordion shape.

11. The rubber-elastic bearing according to claim 8, wherein the connection element has a stepped hollow-cylindrical profile.

12. The rubber-elastic bearing according to claim 8, wherein the connection element surrounds the joining aid.

13. The rubber-elastic bearing according to claim 1, wherein the joining aid has a tapering shape toward the carrier component.

14. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing and the joining aid are symmetrical.

15. The rubber-elastic bearing according to claim 1, wherein the rubber-elastic bearing has an annular groove that circumferentially surrounds a bore formed in the carrier component.

16. The rubber-elastic bearing according to claim 15, wherein the rubber-elastic bearing has a joining region that receives an axial end of the joining aid, the joining region being configured to enable play of the axial end without impairing elasticity of the rubber-elastic bearing.

17. The rubber-elastic bearing according to claim 1, wherein an axial end of the joining aid is spaced from an axial end of the rubber-elastic bearing that is proximate the axial end of the joining aid when the joining aid is inserted in the rubber-elastic bearing.

18. The rubber-elastic bearing according to claim 8, wherein the connection element has a hollow-cylindrical profile, wherein the joining aid has a cylindrical profile, and wherein the entire circular wall of the joining aid is spaced from the interior wall of the connection element.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The invention is explained in more detail in the following with reference to the attached drawings on the basis of preferred exemplary embodiments. However, the principle applies that the exemplary embodiments do not limit the invention, but are merely embodiments. The features shown can be implemented individually or in combination with further features of the description.

(2) In the drawings:

(3) FIG. 1 shows a design of a hollow profile-shaped bearing in an arrangement between a carrier component and a housing,

(4) FIG. 2 shows a further design variant in a side view and in section with a bearing between a housing and a carrier component, the bearing being shown with a spherical head connection with respect to the carrier component, and

(5) FIG. 3 is a further side view and an exemplary embodiment of a bearing between a housing and a carrier component with an integrally formed joining aid as part of the elastic bearing.

DETAILED DESCRIPTION

(6) FIG. 1 shows a drive unit 1 only in regions and in the region of a decoupled fastening on a carrier component 3. FIG. 1 shows a section through a rubber-elastic bearing 4, the rubber-elastic bearing 4 being accommodated in the housing 8 with a first portion 5 between a first housing part 6 and a second housing part 7. The rubber-elastic bearing 4 extends from the first portion via a connection element 9 to a second portion 10 toward the carrier component 3. In this embodiment, the rubber-elastic bearing 4 is designed as a hollow profile having a recess 11. The rubber-elastic bearing 4 is shown in FIG. 1 in section and in a side view, the rubber-elastic bearing 4 in this exemplary embodiment being describable as cylindrical or round. The connection element 9 forms a stepped hollow-cylindrical profile.

(7) A joining aid 12 extends into the recess 12. In this exemplary embodiment, the joining aid 12 is integral with the second housing part 7, but it is also conceivable that the joining aid 12 can be connected to the second housing part 7 as a separate component along a dividing line 13. In this case, the joining aid 12 could be connected to the second housing part as a separate component. The joining aid 12 extends, starting from the first portion 5 of the rubber-elastic bearing, through the connection element 9 into the region of the second portion 10 of the rubber-elastic bearing 4. As indicated by the axis of symmetry H, at least the rubber-elastic bearing 4 and the joining aid 12 are symmetrical.

(8) In any case, the joining aid 12 extends from the first portion 5, in which the bearing 4, the electric motor, the first housing part 6 and the second housing part 7 and an extension 14 are integrated or fixed, into the connection element 9. The shape of the joining aid 12 is selected such that the bearing 4 acts independently of the joining aid 12 in the context of the decoupling movement between the housing 8 and the carrier component 3. In other words, the rubber-elastic bearing 4 is not impaired by the joining aid in the context of decoupling the drive unit 1 from the carrier component 3.

(9) An axial end 15 of the joining aid 12 extends into the second portion 10 of the bearing 4. The second portion 10 can also be described as a joining region 10. In the joining region 10, a circumferential annular groove 16 is formed in the bearing 4 which circumferentially surrounds a bore 17 in the carrier component 3 and in which the circumferential annular groove 16 is held. The joining region 10 thus fits interlockingly into the carrier component 3. The annular groove 16 advantageously makes it possible to connect the bearing 4 to carrier components 3 of different thicknesses, such that the elastic bearing 4 can be used in many different regions of the vehicle.

(10) As can be clearly seen in FIG. 1, a force F can be introduced into the joining region 10 by means of the joining aid 12 in order to securely connect the joining region 10 to the carrier component 3. The axial end 15 has sufficient play S in order, on the one hand, to allow easy joining of the joining region 10 and, on the other hand, not to impair the elasticity of the bearing 4. The joining aid 12 can thus ensure easy and secure joining of the bearing 4 to the carrier component 3.

(11) FIG. 2 shows an alternative embodiment of a connection between a drive unit 18 and a carrier component 19. The carrier component 19 has a spherical cut-out 20 into which a spherical head 21 can be interlockingly inserted. The spherical head 21 can be made of plastics material or metal, for example. An advantageous material pairing results when the carrier component 19 is made of plastics material and the spherical head 21 is made of a metal material. The spherical head 21 is, for example, integrally bonded to a rubber-elastic bearing 22. The rubber-elastic bearing 22 has an accordion-like connection element 23 which connects the second portion 24 of the rubber-elastic bearing 22 to the first portion 25. A joining aid 27 is in turn formed integrally on a second housing part 26, such that when the drive unit 18 is installed, it is possible to join the spherical head 21 and this joining can be assisted by a force from the joining aid 27.

(12) FIG. 3 shows an alternative embodiment of a rubber-elastic bearing 28. The rubber-elastic bearing 28 connects a carrier component 29 to a housing 30, the joining aid 31 being integral with the rubber-elastic bearing 28 in this exemplary embodiment. In this exemplary embodiment, the rubber-elastic bearing 28 has two circumferential annular grooves 32, 33, a first annular groove 23 being connectable to the housing 30 and a second annular groove 32 being connectable to the carrier component 29. The rubber-elastic bearing 28 is usually connected to the housing 30 of the drive unit and installed on the carrier component 29. When joining the elastic bearing 28, secure and easy joining of the joining region 34 of the rubber-elastic bearing 28 can now be assisted and achieved by means of the joining aid 31.

LIST OF REFERENCE SIGNS

(13) 1, 18 drive unit 2 decoupled fastening 3, 19, 29 carrier component 4, 22, 28 rubber-elastic bearing 5, 25 first portion 6 first housing part 7, 26 second housing part 8, 30 housing 9, 23 connection element 10, 24, 34 second portion, joining region 11 recess 12, 27, 31 joining aid 13 dividing line 14 extension 15 axial end 16, 32, 33 annular groove 17 bore 20 cut-out 21 spherical head A axis of symmetry F force S play