Wedge bearing

Abstract

The invention relates to a wedge bearing (1) for the vibration-damping connection of two components, comprising a first bearing part (2) designed for detachable attachment to a first component, which has a mounting surface (9) to a contact surface of a first component and comprises a recess with a substantially trapezoidal cross-section, and a second bearing part (3) arranged in this recess, wherein an elastomer (4) is inserted in an intermediate space between the second bearing part (2) and the recess, and wherein the second bearing part (3) comprises a receptacle (8) for a second component, wherein the first bearing part (2) has a shaping (5) protruding from the mounting surface (9), which penetrates the contact surface of the first component in the mounting position of the wedge bearing (1), wherein the shaping (5) has a bore (10) through which a blocking device can be introduced, which connects the first bearing part (1) to the first component in a form-fitting manner.

Description

[0001] Description

[0002] Wedge bearing

[0003] Technical area

[0004] The invention relates to a wedge bearing.

[0005] State of the art

[0006] Wedge bearings are machine elements for the vibration-damped connection of components. They are used, for example, to mount engines and gearboxes on the body of a motor vehicle or to mount assemblies on the body of a rail vehicle. A wedge bearing consists of a first bearing part, which is for attachment to a first component, and a second bearing part, which is for attachment to a second component. The first bearing part has a recess with an essentially trapezoidal cross-section. The second bearing part is arranged in this recess, with an intermediate space existing between the second bearing part and the recess, into which an elastomer is inserted. A second component can therefore be attached to the second bearing part, which is thereby mounted in a vibration-damping manner relative to the first bearing part and thus to the first component.In practical applications, particularly in rail vehicle construction, very heavy assemblies such as transformers are often arranged beneath a car body using wedge bearings. These assemblies are typically designed with rod-shaped formations which penetrate the tubular second bearing parts of the wedge bearings. Since the fastening of these so-called underfloor devices is subject to very high safety requirements, a fall protection device must generally be provided. If, for example, such an underfloor device is fastened to a car body using four wedge bearings, the failure of one of the wedge bearings can overload the remaining wedge bearings, which could subsequently also fail. The first bearing parts of such wedge bearings are usually fastened using screw connections which can work loose in rare exceptional cases despite correct dimensioning.Therefore, additional measures are taken to prevent the adverse effects of a failing wedge bearing. For example, welded tabs can be installed on the car body to prevent the underfloor unit from falling off in the event of a wedge bearing failure. However, this changes the force path between the underfloor unit and the car body, which introduces a number of additional problems.

[0007] Description of the invention

[0008] The invention is therefore based on the object of specifying a wedge bearing with a drop-out protection which avoids the disadvantages of the prior art.

[0009] The object is achieved by a wedge bearing having the features of claim 1 and a vehicle according to claim 7. Advantageous embodiments are the subject of subordinate claims.

[0010] According to the basic idea of ​​the invention, a wedge bearing for the vibration-damping connection of two components is described, which comprises a first bearing part designed for detachable fastening to a first component, which first bearing part has a mounting surface to a contact surface of a first component and a recess with a substantially trapezoidal cross-section and a second bearing part arranged in this recess, wherein an elastomer is inserted in a space between the second bearing part and the recess and wherein the second bearing part comprises a receptacle for a second component, wherein the first bearing part has a formation protruding from the mounting surface, which in the mounting position of the wedge bearing penetrates the contact surface of the first component, wherein the formation has a bore through which a blocking device can be introduced,which connects the first bearing part with the first component in a form-fitting manner.

[0011] This provides the advantage of being able to create a wedge bearing which cannot fall off from the first component connected to the wedge bearing even if all connecting elements to the first component fail.

[0012] According to the invention, the wedge bearing is constructed from a first bearing part and a second bearing part. The first bearing part is designed for detachable fastening to a first component, for example an underframe of a vehicle, and for this purpose has corresponding provisions, in particular bores for screw connections. The first bearing part is furthermore equipped with a mounting surface, via which it bears against the first component in a mounting position. The first bearing part comprises a recess with a substantially trapezoidal cross-section. A second bearing part is arranged in this recess, with an elastomer being arranged between the second bearing part and the recess. The second bearing part comprises a receptacle for a second component. A bore is typically provided as the receptacle.

[0013] The first bearing part is equipped with a formation which, in the assembly position of the wedge bearing, penetrates the first component to which the first bearing part is fastened and connects the first bearing part to the first component in a form-fitting manner by means of a blocking device. For this purpose, the formation is provided on the assembly surface and is shaped such that it penetrates the first component through a corresponding recess in the corresponding surface (contact surface) of the first component. The blocking device can be implemented in different ways. According to a first embodiment, the blocking device comprises a bore in the formation of the first bearing part, through which bore a bolt can be inserted which prevents the formation from being withdrawn from the first component.

[0014] A further preferred embodiment of the invention provides for the blocking device to be constructed from a bore in the formation of the first bearing part and a bolt which can be introduced into this bore, wherein the bolt, however, cannot itself come into contact with the first component, but rather creates the positive connection with the first component via a fork.

[0015] This provides the advantage of being able to reduce the surface pressure between the first component and the locking device, since the contact surface on the fork can be made significantly larger than that on a bolt. Furthermore, assembly is made significantly easier, since the bolt is spaced apart from the contact surface and is therefore easier to insert. The bolt itself is preferably cylindrical with a shoulder at one end. It is particularly advantageous to lock the bolt in its assembly position with a positive fit, in particular by means of a retaining ring.

[0016] The fork is preferably provided with a recess through which the formation of the first bearing part penetrates when the wedge bearing is in the assembled position, with the bolt penetrating the fork at two points. Such a fork can, for example, be U-shaped, with the recess for the formation of the first bearing part to penetrate being provided at the bottom of the fork. The two legs of the U-shaped fork are provided with concentric bores which, when the fork is in the assembled position, are aligned with the bore in the formation of the first bearing part, so that the bolt can be inserted into these three bores.

[0017] The components of the wedge bearing according to the invention can be made from any suitable material. Since such a wedge bearing is particularly suitable for assembling heavy components, manufacturing it from steel is particularly advantageous. However, if the strength requirements are lower, for example, for lighter components such as air conditioning systems, a wedge bearing made from a light metal alloy can also be used.

[0018] A particularly advantageous application of the present invention is the assembly of heavy components on the undercarriage of a vehicle, in particular a rail vehicle. In such an application, the component, for example a transformer, is to be secured beneath the vehicle body by means of at least one wedge bearing according to the invention.

[0019] The present invention offers the significant advantage that the point of force introduction between a car body and a component remains intact in the event of a fastening failure. The drop-off protection of a wedge bearing according to the invention introduces these forces into the car body at the same point, which is not necessarily the case with known drop-off protection devices, and the force introduction points of such drop-off protection devices must be designed to be correspondingly stable, which leads to additional design and construction costs.

[0020] Brief description of the drawings

[0021] Examples include:

[0022] Fig. l Wedge bearing.

[0023] Fig . 2 First bearing part .

[0024] Fig. 3 Fork.

[0025] Fig. 4 Wedge bearing in assembly position.

[0026] Embodiment of the invention Fig. 1 shows a wedge bearing by way of example and schematically. A wedge bearing 1 is shown in the mounted position on a car body 12, the car body 12 being able to be part of a rail vehicle. In the exemplary embodiment shown, a bracket 13 is fastened to the car body 12 and serves as a receiving point for the wedge bearing 1. This bracket 12 comprises a mounting plate and bores for screwing the wedge bearing 1. The wedge bearing 1 is constructed from a first bearing part 2 and a second bearing part 3, the second bearing part 3 being arranged in a trapezoidal recess in the first bearing part 2. In an intermediate space between the second bearing part 3 and the recess, two components made of elastomer 4 are arranged, for example, which are each connected to the first bearing part 2 and the second bearing part 3. The second bearing part 3 is thus mounted in the first bearing part 2 in a vibration-damping manner.The second bearing part 3 is equipped with a receptacle 8 which enables the detachable mounting of an assembly, for example a transformer of a rail vehicle. This assembly is not shown in Fig. 1; in practical designs it would have a rod-shaped connection which engages in the receptacle 8. The wedge bearing 1 is detachably fastened to the bracket 13 by means of four screw connections 15 and two double nuts 14. The wedge bearing 1 is further equipped with a fall-off protection device which comprises a formation 5 which projects from the first bearing part 1 in the direction of the mounting plate of the bracket 13 and penetrates this mounting plate through a recess in the mounting plate. This formation 5 is secured with a blocking device so that a positive connection between the formation 5 and thus the entire wedge bearing 1 and the car body 12 is produced.In the illustrated embodiment, the blocking device is constructed in a more complex manner, in accordance with the stringent requirements of rail vehicle construction, than a simple bolt through the bore 10 of the recess 5, which could also create a positive connection, but would have certain disadvantages. Therefore, the blocking device is constructed with a fork 6, which is secured with a bolt 7 through the bore 10 of the recess 5. In the event of failure of the screw connections 15, this fork 6 distributes the force acting between the bracket 13 and the wedge bearing 1 over a specific area, so that deformation of the bracket can be ruled out and repairs to the car body are not necessary after failure of the screw connections 15. Securing the bolt 7, for example by means of a retaining ring, is not shown in Fig. 1 to simplify the illustration.

[0027] Fig. 2 shows a schematic, exemplary first bearing part. It depicts the first bearing part 2 from the embodiment shown in Fig. 1, without any additional components. In addition to the trapezoidal recess, the protrusion 5 with the bore 10 protruding from the mounting surface 9 is clearly visible.

[0028] Fig. 3 shows a fork by way of example and schematically. It shows the fork 6 from the embodiment shown in Fig. 1, without any additional components. The fork 6 is essentially U-shaped and has an opening (recess) at the base of the U-shaped structure through which a formation 5 of a first bearing part 2 can be passed. In the legs of this U-shaped structure, aligned bores 11 are provided, by means of which the fork 6 can be connected to a formation 5 by means of a bolt 7.

[0029] Fig. 4 shows, by way of example and schematically, a wedge bearing in the assembled position. It shows the wedge bearing 1 from Figs. 1-3 in its assembled position on a bracket 13 of a car body 12, with the second bearing part 3 and the elastomer 4, as well as the blocking device, omitted. In this way, the penetration of the formation 5 through the mounting plate of the bracket 13 is particularly clearly visible.

[0030] List of names

[0031] 1 wedge bearing

[0032] 2 First part of the bearing

[0033] 3 Second part of the warehouse

[0034] 4 Elastomer

[0035] 5 Forming

[0036] 6 forks

[0037] 7 bolts

[0038] 8 Recording

[0039] 9 Mounting area

[0040] 10 Hole

[0041] 11 Hole in fork

[0042] 12 car body

[0043] 13 Console

[0044] 14 double nut

[0045] 15 screw connection

Claims

Patent claims 1. Wedge bearing (1) for the vibration-damping connection of two components, comprising a first bearing part (2) designed for releasable fastening to a first component, which first bearing part has a mounting surface (9) to a contact surface of a first component and comprises a recess with a substantially trapezoidal cross-section, and a second bearing part (3) arranged in this recess, wherein an elastomer (4) is inserted in a space between the second bearing part (2) and the recess, and wherein the second bearing part (3) comprises a receptacle (8) for a second component, characterized in that the first bearing part (2) has a protrusion (5) protruding from the mounting surface (9), which, in the mounted position of the wedge bearing (1), penetrates the contact surface of the first component, wherein the protrusion (5) has a bore (10) through which a blocking device can be introduced,which connects the first bearing part (1) with the first component in a form-fitting manner., 2. Wedge bearing (1) according to claim 1, characterized in that the blocking device is constructed from a bolt (7) which can be inserted into the bore (10) of the recess (5) and a fork (6).

3. Wedge bearing (1) according to claim 2, characterized in that the fork (6) comprises a recess through which, in the assembly position of the wedge bearing (1), the formation (5) of the first bearing part (1), whereby the bolt (7) penetrates the fork (6) at two points.

4. Wedge bearing (1) according to claim 3, characterized in that the bolt (7) is blocked in its mounting position in a form-fitting manner, in particular by a retaining ring.

5. Wedge bearing (1) according to one of claims 1 to 4, characterized in that the first bearing part (2) has four bores for receiving screw connections (15) to a contact surface of a first component.

6. Wedge bearing (1) according to one of claims 1 to 5, characterized in that the first bearing part (2), the second bearing part (3) and the blocking device are made of steel.

7. Vehicle, in particular a rail vehicle, comprising a car body (12), in which a component is fastened below the car body (12) by means of at least one wedge bearing (1) according to one of claims 1 to 6.

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