CN116085390A

CN116085390A - Bearing assembly

Info

Publication number: CN116085390A
Application number: CN202211345955.1A
Authority: CN
Inventors: 沃克尔·温特; 克里斯蒂安·克诺奇
Original assignee: SKF AB
Current assignee: SKF AB
Priority date: 2021-11-05
Filing date: 2022-10-31
Publication date: 2023-05-09
Also published as: DE102021212462A1

Abstract

Bearing assembly (1), in particular for a bearing assembly (1) of a truck, the bearing assembly (1) comprising a bearing unit (2) and a measuring ring (8), in particular an encoder ring, of a rotational speed measuring device, the bearing unit (2) having a first bearing ring (4), a second bearing ring and a plurality of rolling elements arranged between the first bearing ring and the second bearing ring, wherein the first bearing ring (4) comprises a shoulder (6), the shoulder (6) being configured to carry the measuring ring (8), wherein a recess (16) is formed between a radially outer surface (18) of the first bearing ring (4) and the shoulder (6), the recess (16) forming a receiving surface (20) for the measuring ring (8), wherein the receiving surface (20) has a first outer diameter (D1) and a second outer diameter (D2), wherein the first outer diameter (D1) is larger than the second outer diameter (D2).

Description

Bearing assembly

Technical Field

The present invention relates to a bearing assembly according to the preamble of patent claim 1.

Background

In wheel bearing assemblies, particularly trucks, bearing assemblies are commonly used to provide a connection between an axle element and a wheel. Here, such bearing assemblies generally comprise a bearing unit, in particular a multi-row bearing unit. The braking element and the at least one wheel are connected (via the rim) directly or indirectly to one of the bearing rings of the bearing unit. For determining the rotation of the wheel, in particular the rotational speed of the wheel, a cylindrical receiving surface for a measuring ring of a rotational speed measuring device, such as for example an encoder of an ABS system, which is part of a brake system, is provided on one of the bearing rings of the bearing unit.

Typically, the measuring ring is pushed onto the cylindrical receiving surface in the axial direction and is held by a press fit (press fit). However, in operation (operation), for example during manoeuvres of a truck and/or trailer, the bearing ring carrying the measuring ring may be deformed such that the measuring ring may be moved in axial direction on its receiving surface and even be released from its receiving surface and possibly damage the sensor unit reading the measuring ring.

Disclosure of Invention

It is therefore an object of the present invention to provide a bearing assembly which improves the fixation of a measuring ring on a receiving surface.

This object is achieved by a bearing assembly according to patent claim 1.

In the following, a bearing assembly, in particular for a truck, is provided, comprising a bearing unit having a first bearing ring, a second bearing ring and a plurality of rolling elements arranged between the first bearing ring and the second bearing ring, and which bearing assembly is provided with a measuring ring, in particular an encoder ring, of a rotational speed measuring device. For example, the rolling elements may be tapered rollers. However, other rolling element types are also conceivable, such as for example balls. Furthermore, the bearing unit may be a preassembled bearing unit. Alternatively, at least two separate bearings may also form a bearing unit. Furthermore, the first bearing ring may be a rotating bearing ring. Preferably, the first bearing ring is an outer ring. Alternatively, the first bearing ring may be an inner ring.

Furthermore, the first bearing ring comprises a shoulder configured to carry the measuring ring, wherein a recess is formed between a radially outer surface of the first bearing ring and the shoulder, the recess forming a receiving surface (receiving surface) for the measuring ring. Here, the surface having a larger diameter is designated as an outer surface. In the case of an outer race, the outer surface may also coincide with the outer surface of the bearing; however, in the case of an inner race, the outer surface will be the surface of the race on which the inner race is formed in the sense of the present application. In particular, the bearing assembly may be part of a wheel bearing assembly of a vehicle. The measuring ring is preferably at least partially made of sheet metal. For example, the first bearing ring may be formed by forging. Furthermore, the receiving surface may be turned and/or ground.

In order to improve the fixing of the measuring ring on the receiving surface, the receiving surface has a first outer diameter and a second outer diameter, wherein the first outer diameter is larger than the second outer diameter. This makes it possible for the measuring ring (which as usual is pressed against the first outer diameter) to be at least partially against the smaller second diameter and thereby be better fixed on the receiving surface.

Preferably, the first outer diameter is arranged in the axial direction on a side of the shoulder facing away from the rolling elements, and the second outer diameter is arranged in the axial direction on a side of the shoulder facing towards the rolling elements. Thus, the smaller second outer diameter is axially more inward and the fixation of the measuring ring on the receiving surface can be further improved as the sliding-off of the measuring ring from the shoulder is prevented by the larger first diameter of the receiving surface.

According to another embodiment, the receiving surface comprises a first region having the first outer diameter and a second region having the second outer diameter, wherein a transition between the first region and the second region is configured in the form of a step. Advantageously, the step between the first region and the second region may reduce the movement (/ movement) of the measuring ring in the axial direction and/or prevent the measuring ring from loosening from the shoulder of the first bearing ring. Further damage to, for example, the rotational speed measuring device, the bearing unit and/or the wheel bearing assembly can thereby be prevented.

According to another embodiment, the receiving surface is inclined and tapers from the first outer diameter to the second outer diameter. Preferably, the receiving surface has an inclination angle of 1 ° or less. Particularly preferably, the inclination angle is equal to 0.8 °. Advantageously, the inclination between the first region and the second region may reduce movement in the axial direction and/or prevent loosening of the measuring ring from the shoulder of the first bearing ring in the axial direction. This makes it possible to prevent further damage, in particular to the sensor unit.

According to another preferred embodiment, the measuring ring comprises an axial region and a radial region, wherein the axial region cooperates with the second outer diameter of the receiving surface, and wherein at an end of the axial region cooperating with the second outer diameter the axial region comprises a reinforcement, wherein in particular the reinforcement supports the measuring ring to a second diameter of relaxation. Thereby, a more secure attachment of the measuring ring to the receiving surface can be achieved.

Furthermore, the reinforcement may be configured as a flange that is bent radially outwards. Preferably, the reinforcement can be configured as a spring element acting radially inwards, in particular as a ring spring (ring spring). Advantageously, this makes it possible for the measuring ring to relax to a smaller outer diameter after attachment to the receiving surface and thereby to be fixed on the shoulder of the first bearing ring.

Additional advantages and advantageous embodiments are specified in the description, the drawings and the claims. Here, in particular, the combinations of features specified in the description and the drawings are merely exemplary, so that features may also be present alone or in other combinations.

Hereinafter, the present invention will be described in more detail using exemplary embodiments depicted in the accompanying drawings. Here, the exemplary embodiments and combinations shown in the exemplary embodiments are merely exemplary and are not intended to limit the scope of the present invention. This scope is limited only by the pending claims.

Drawings

FIG. 1 shows a bearing assembly according to a first embodiment, and

fig. 2 shows a bearing assembly according to a second embodiment.

In the following, identical or functionally equivalent elements are designated by identical reference numerals.

List of reference numerals

1. Bearing assembly

2. Bearing unit

4. First bearing ring

6. Shoulder part

8. Measuring ring

10. Axial region

12. Radial region

14. Encoder region

16. Concave part

18. Radially outer surface

20. Receiving surface

22. Flange

24. Step

26. Inclination angle

Detailed Description

Fig. 1 shows a bearing assembly 1 according to a first embodiment. In particular, the bearing assembly 1 may be used in a truck. The bearing assembly 1 comprises a bearing unit 2, the bearing unit 2 comprising a rotating first bearing ring 4, a stationary second bearing ring (not shown) and a plurality of rolling elements (not shown). The rolling elements are arranged between the first bearing ring and the second bearing ring.

The first bearing ring 1 comprises a shoulder 6, the shoulder 6 being configured as a carrier (carry) measuring ring 8. Preferably, the measuring ring is at least partially made of sheet metal. The measuring ring 8 comprises an axial region 10 and a radial region 12. In particular, an encoder region 14 is arranged in the radial region 12 of the measuring ring 8, wherein the encoder region is configured to be read from a sensor unit of the rotational speed measuring device in order to determine the rotational speed of the bearing unit 2. For example, the rotational speed measuring device may be part of a braking system and/or an anti-lock braking system (anti-lock braking system).

Furthermore, on the shoulder 6, a recess 16 is formed between the radially outer surface 18 of the first bearing ring 4 and the shoulder 6, which recess 16 forms a receiving surface 20 for the measuring ring 8. The receiving surface 20 has a first outer diameter D1 and a second outer diameter D2, wherein the first outer diameter D1 is greater than the second outer diameter D2. Preferably, the receiving surface 20 is turned (turned) and/or ground.

The first outer diameter D1 is arranged in the axial direction on the side of the shoulder 6 facing away from the rolling elements, and the second outer diameter D2 is arranged in the axial direction on the side of the shoulder 6 facing the rolling elements. Thus, the smaller second outer diameter D2 is axially further inward, which may further improve the fixation of the measuring ring 8 on the receiving surface 20.

In addition, the measuring ring 8 shown in fig. 1 is provided with an outwardly curved flange 22 in its axial region 10, the flange 22 acting as a reinforcement, so that the axial region 10 of the measuring ring is configured to cooperate with the second outer diameter D2 of the receiving surface 20. As a further alternative, the measuring ring may also comprise a different reinforcement adapted to cooperate with the second outer diameter over its axial region 10. For example, the reinforcement can be configured as a spring element, in particular as a ring spring, acting radially inwards. Advantageously, this allows the measuring ring 8 (measuring ring 8 can rest against the first outer diameter D1 as usual with a press seat) to relax over the smaller outer diameter D2 and thereby be fixed on the shoulder 6 of the first bearing ring 4. Here, in particular, the outwardly curved flange 22 or reinforcement supports the measuring ring 8 resting on the second diameter D2.

In fig. 1, the receiving surface 20 comprises a first region having a first outer diameter D1 and a second region having a second outer diameter D2, wherein the transition between the first region and the second region is provided with a step 24. In addition, the measuring ring 6 may also comprise a protrusion on the side opposite the receiving surface, which protrusion is configured to be received in the second area. For example, the protrusion may be formed complementary to the step 24 and/or snap into the step of the transition region between the first region and the second region.

Fig. 2 shows a bearing assembly 1 according to a second embodiment. The bearing assembly of fig. 2 differs from the bearing assembly 1 of fig. 1 in that the receiving surface is inclined and tapers (/ tapers) (gradually tapering) from a first outer diameter D1 to a second outer diameter D2. Preferably, the receiving surface 20 has an inclination angle 26 of 1 ° or less. Particularly preferably, the angle of inclination is 0.8 °.

In summary, since the receiving surface 20 has a first outer diameter D1 and a second outer diameter D2 smaller than the first outer diameter D1, a better fixing of the measuring ring 8 on the shoulder 6 of the first bearing ring 4 can be achieved. Advantageously, this fixing is achieved by: after the measuring ring 8 has been applied to the shoulder 6 of the first bearing ring, the measuring ring 8 is pressed against the first outer diameter D1 as usual with a press fit. In the region of the smaller second outer diameter, in particular, the measuring ring 8 may relax in the axial region 10, and the diameter of the measuring ring 8 may be reduced to the smaller second outer diameter D2 of the receiving surface 20, such that the larger first diameter D1 reduces the movement of the measuring ring 8 in the axial direction, and/or may prevent the measuring ring 8 from loosening from the shoulder 6 of the first bearing ring. Further damage to, for example, the rotational speed measuring device, the bearing unit and/or the wheel bearing assembly can thereby be prevented.

Claims

1. Bearing assembly (1), in particular for a truck, the bearing assembly (1) comprising a bearing unit (2) and a measuring ring (8) of a rotational speed measuring device, in particular the measuring ring (8) being an encoder ring, the bearing unit (2) having a first bearing ring (4), a second bearing ring and a plurality of rolling elements arranged between the first bearing ring and the second bearing ring, wherein the first bearing ring (4) comprises a shoulder (6), the shoulder (6) being configured to carry the measuring ring (8), a recess (16) being formed between a radially outer surface (18) of the first bearing ring (4) and the shoulder (6), the recess (16) forming a receiving surface (20) for the measuring ring (8), characterized in that the receiving surface (20) has a first outer diameter (D1) and a second outer diameter (D2), the first outer diameter (D1) being larger than the second outer diameter (D2).

2. Bearing assembly (1) according to claim 1, wherein the first outer diameter (D1) is arranged in the axial direction on a side of the shoulder (6) facing away from the rolling elements, and the second outer diameter (D2) is arranged in the axial direction on a side of the shoulder (6) facing towards the rolling elements.

3. Bearing assembly (1) according to claim 1 or 2, wherein the receiving surface (20) comprises a first region with the first outer diameter (D1) and a second region with the second outer diameter (D2), a transition between the first and second regions being configured in the form of a step (24).

4. Bearing assembly (1) according to claim 1 or 2, wherein the receiving surface (20) is inclined and tapers from the first outer diameter (D1) to the second outer diameter (D2).

5. Bearing assembly (1) according to claim 4, wherein the receiving surface (20) has an inclination angle of 1 ° or less.

6. Bearing assembly (1) according to any of the preceding claims, wherein the measuring ring (8) comprises an axial region (10) and a radial region (12), the axial region (10) cooperating with the second outer diameter (D2) of the receiving surface (20), and the axial region (10) has a reinforcement at its end cooperating with the second outer diameter (D2).

7. Bearing assembly (1) according to claim 6, wherein the reinforcement is configured as a flange (22) bent radially outwards.

8. Bearing assembly (1) according to claim 6 or 7, wherein the reinforcement is configured as a spring element acting radially inwards, in particular the spring element is a ring spring.

9. Bearing assembly (1) according to any of the preceding claims, wherein the measuring ring (8) is at least partly made of sheet metal.

10. Bearing assembly (1) according to any of the preceding claims, wherein the receiving surface (20) is turned and/or ground.