RU2574306C2 - Block of wheel bearing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to the block of wheel bearing with two mirror located conical roller bearings (02) with internal ring (04) and external ring (03). Connection of internal rings (04) is made using the connecting device. The block of the wheel bearing contains external distance ring (07) and internal distance ring (08), that in axial direction are located between the external rings (03), correspondingly between internal rings (04). The internal distance ring (08) is made as connecting device. The external distance ring (07) at their end surface has profile of the distance ring, that correspondingly enters in contact with the additionally formed profile of the external ring at the end side of the external rings in connection weld (12).

EFFECT: creation of block of wheel bearing that is easily installed, and has very high service life.

9 cl, 8 dwg

Description

FIELD OF THE INVENTION

The invention relates to a wheel bearing unit, in particular for trucks with two mirror-mounted tapered roller bearings according to the preamble of paragraph 1 of the claims.

State of the art

Wheel bearings and wheel hubs are, as you know, highly loaded elements for suspension of wheels in the undercarriage of a truck, which, especially in trucks, must withstand various loads. At the same time, a long service life and the use of bearings and wheel hubs free of maintenance are decisive competitive advantages of such trucks. Despite the very long service life and lack of maintenance, repair of defective bearings is often necessary and more expensive than buying a new one. Therefore, wheel bearing blocks are offered as spare parts in the spare parts market sector.

In the wheel bearing blocks for trucks, the so-called insert blocks of tapered roller bearings are predominantly used.

The so-called insert bearing is also known from DE 10 2006 017 162 A1. The wheel bearing insert unit described here is a replaceable unit that can be mounted without special knowledge and without special tools using the simple auxiliary tools available in repair shops without any special requirements for cleanliness during installation. The bearing block includes two tapered roller bearings with an outer ring and an inner ring, respectively, between which a row of taper rollers is located. Tapered roller bearings are located in the wheel hub mirror to each other and are fixed by a thrust ring. During installation, individual wheel bearings are axially pressed into the wheel hub, with a protrusion in the wheel hub correspondingly serving as a stop. Thanks to the axial installation of the thrust ring in the corresponding grooves of the inner rings, the inner rings are connected to each other and the bearing is fixed.

From DE 69409511 T2, a connecting ring is known for holding the inner sections of the raceway of adjacent bearings. The connecting ring has high strength and allows easy assembly of two bearings to form, for example, one wheel bearing. The connecting ring is made of a spring material and has two opposite, extending outwardly extending elastic tongues located opposite the perimeter. Thanks to the elastic tongues, the connecting ring can be easily inserted into the inner race of the bearing. When the connecting ring is in its final position, the tabs bounce outward to lock the ring in place. In this case, the inner race of the second bearing can be pressed against the open half of the connecting ring until it is fixed by the tongues of the second row around the perimeter. Outer rings are introduced from respectively different sides into the wheel hub until they reach the stop. The inner rings of the bearings abut against each other with their end surfaces, i.e. inner rings should be made wider than outer rings. This means significant use of the material, in particular expensive bearing steel.

A design group of rolling bearings is known from DE 10 2004 018 901 B3, which can be mounted on a truncated cone-shaped hub. The structural group of rolling bearings includes an inner ring formed by a single outer ring and consisting of at least two parts. Rolling bodies are conical rollers. In the same place in which both inner rings are abutted against each other, both inner rings are designed to fit one into the other in the axial direction. To this end, each of the inner rings, respectively, in the end region towards said side is provided with an annular groove, which in the axial direction, in cooperation with the annular region located in front of the groove in the direction of the said side, is designed as an undercut. The lateral surfaces of the annular regions facing each other are threaded, as a result of which, during the first installation, the inner rings are screwed into one another to protect against loss. In the installed state, the thread is unscrewed. The connection is detachable and may be axially loaded. The overall width of the inner and outer rings must correspond to the overall width of the bearing block.

DE 19858973 C1 describes a multi-row rolling bearing with at least two separate inner and / or outer rings. Both axially adjacent inner or outer rings in the area of a common mounting seam are connected to each other by means of a connecting element. In the axial cylindrical section of the junction there is a groove into which the connecting element shaped like a wire is laid.

A rolling bearing with two inner rings and a sealing system for sealing the joint between the inner rings is known from DE 102006026443 A1.

From DE 19961712 B4 a multi-row rolling bearing with at least two separate inner and / or outer rings directly connected to each other is known. The inner rings have a correspondingly elongated region with a groove, and accordingly the outer contour of the inner ring is fixed in the groove of the other inner ring. This bearing has a single integral outer ring. Also, there are no high costs for materials, in particular expensive bearing steel.

Known insert bearing blocks, depending on the total width of the bearing block, have long and yet expensive inner rings. Bearing blocks with a solid outer ring with significant use of materials on rolling bearings in the manufacture.

Disclosure of invention

The objective of the invention is to create a low-cost in the manufacture of the wheel bearing unit, which is easy to install and has a very high service life.

According to the invention, the problem is solved in the wheel bearing unit by the features of paragraph 1 of the claims.

The wheel bearing unit proposed in accordance with the invention includes two tapered roller bearings mirrored to each other with an inner ring and an outer ring, respectively. Between the inner ring and the outer ring are conical rollers as rolling elements, mainly in a cage.

According to the invention, the wheel bearing unit further includes an inner and an outer lining ring, which are axially disposed between the inner rings, respectively, between the outer rings of the tapered roller bearing.

The connection of both, as a rule, single-wide tapered roller bearings with the formation of the wheel bearing block is carried out using the inner lining ring, which works as a distance lock and connecting means. The connection is made predominantly by means of a locking connection between the spacer ring and both inner rings, with fully pre-mounted tapered roller bearings.

The advantages of the invention should be seen, in particular, in that an alternative may be offered to more expensive and more expensive known solutions. At the same time, it is possible to switch from bearings in the catalog to simply assembled integral blocks of bearings that are simply mounted by customers to ensure a service life.

Other advantages lie primarily in the use of materials. Due to the small width of the rings of individual tapered roller bearings, blanks for columns can be used. Due to this, significantly less use of expensive bearing steel is achieved. Lining rings are made predominantly from normal, inexpensive structural steel, so that overall cost reduction is achieved.

In a preferred embodiment of the wheel bearing block according to the invention, the outer lining ring has a lining ring profile on its end surfaces that comes into contact with an additionally formed outer ring profile on the end face of the outer rings.

Mostly profiles are represented by a step profile, respectively. It can simply be made, for example, by boring on the appropriate parts. By selecting the dimensions of these profiles, bearing clearance can be adjusted in a simple way.

Due to the design proposed in accordance with the invention, a closed, non-separable bearing block is provided. Other preferred embodiments are provided in the dependent claims.

Brief Description of the Drawings

Preferred embodiments of the invention are explained below with reference to the figures. Where show:

figure 1 - image of a section of a block of a wheel bearing mounted on the hub;

figure 2 - pre-assembled block of the wheel bearing according to figure 1;

figure 3 - a possible profile of the outer rings and the spacer ring in the preferred form of the invention;

4 is a preferred embodiment of a fixing compound;

5 is an alternative form of implementation shown in figure 4 connection options;

6 is a detailed image of the inner cushioning ring;

7 is a connection between the inner ring and the inner gasket ring with a seal;

Fig. 8 is an alternative embodiment of the embodiment shown in Fig. 7.

The implementation of the invention

Figure 1 shows a sectional view of a wheel bearing unit mounted on the hub 01. The wheel bearing unit includes two tapered roller bearings 02 with an outer ring 03, an inner ring 04, and taper rollers 06 located between them as rolling bodies.

An outer spacer ring 07 is located between the outer rings 03. An inner spacer ring 08 is provided between the inner rings 04. Using the inner spacer ring 08 and the inner rings 04, the bearing block is connected as a unit (see FIGS. 4 and 5). Seal 09 protects the inside of the bearing from contamination.

The wheel bearing block in a pre-assembled state is pushed / pressed on one side of the wheel hub 01 to the stop 10 on one side and then locked on the hub 01 with a thrust ring 11. Installation can be carried out on a simple hub form using simple tools without special knowledge.

Figure 2 shows the wheel bearing unit in a pre-assembled state, as it may be offered, for example, in the spare parts market. The parts of the wheel bearing unit are identical to the parts previously described.

A connecting seam 12 is formed between the outer rings 03 and the outer gasket ring 07 in a substantially stepped form. The outer ring 03 and the outer gasket ring 07 have an additionally formed profile 13, 14 on their end side (see also figure 3), which is mainly formed boring on the outer gasket ring 07 in the form of a stepped profile. By means of the connecting seam 12 on the outer spacer ring, the play of the bearing can be adjusted, i.e. the size by which the bearing ring can shift relative to the other in the radial direction (radial play) or in the axial direction (axial play) without a working load from one boundary position to another.

Through the inner gasket ring 08, the bearing block is connected mainly using a locking connection (not shown in FIG. 2). Also between the inner rings 04 and the inner spacer ring 08 is a connecting seam 15, generally having a stepped shape. The locking connection in the preferred forms of implementation is shown in figures 4 and 5. It can be carried out both on the outer diameter of the inner gasket ring 08 and the inner ring 03 (figure 4), and on the inner diameter (figure 5).

In the embodiment shown in FIG. 4, a radial groove 16 is cut into the outer contour of the inner ring 04 in the region of the connecting seam 15, while the radial groove 17 is selected in the inner contour of the inner gasket ring 08.

In the embodiment shown in FIG. 5, the radial groove 16 is selected in the inner contour of the inner ring 04, while the radial groove 17 is provided in the outer contour of the inner spacer ring 08.

In both of the aforementioned forms of implementation, radially extending locking elements 18, 19 are connected to the grooves in the axial direction, which, when the connection is fixed, respectively pop into the groove of the other part.

If necessary, to facilitate mounting of the wheel bearing block in the inner spacer ring 08, axially extending slots 20 can be arranged with a distribution along the perimeter, as shown in FIG. 6. This ensures the springy action of the locking elements 19 when connecting the inner rings 04 with the inner spacer ring 08. The execution of such locking joints is known to the specialist, therefore, other details are omitted here.

Figures 7 and 8 show the use of an additional seal 21. It is preferably used in the bearings of the rear axle. The seal 21 is located in the groove 22, which is formed between the inner ring 04 and the inner gasket ring 08 with the closed joint 15 in the radial direction. The surface 23 of the base of the groove 22 is larger than the radial hole of the groove 22. Such a seal is described, for example, in DE 102006026443 A1.

List of items

01. Hub

02. Tapered roller bearing

03. Outer ring

04. Inner ring

05. -

06. Cone roller

07. Outer lining ring

08. Inner lining ring

09. Seal

10. Emphasis

11. A persistent ring

12. Connecting seam

13. Inner groove

14. Inner groove

15. Connecting seam

16. groove

17. Groove

18. The locking element

19. The locking element

20. Slot

21. Seal

22. Groove

23. The surface of the base

Claims (9)

1. Wheel bearing unit with two mirror-mounted tapered roller bearings (02) with respectively an inner ring (04) and an outer ring (03), wherein the connection of the inner rings (04) is made using connecting means, characterized in that the wheel bearing block contains an outer a spacer ring (07) and an inner spacer ring (08), which are axially located between the outer rings (03), respectively, between the inner rings (04) of the tapered roller bearings (02), and the inner spacer The e-ring (08) is made in the form of connecting means, while the outer cushioning ring (07) has a profile of the cushioning ring on its end surfaces, which accordingly comes into contact with the additionally formed profile of the outer ring on the end side of the outer rings in the connecting seam (12) . 2. The wheel bearing unit according to claim 1, characterized in that the profile of the spacer ring is made in the form of a stepped profile. 3. The wheel bearing block according to claim 1, characterized in that the inner rings (04) are connected to the inner spacer ring (08) by means of a fixing connection (16, 17, 18, 19). 4. The wheel bearing block according to claim 3, characterized in that the locking connection is formed on the inner rings (04) and the inner spacer ring (08) using a radial groove (16, 17) and one locking grip axially connected to the groove (18, 19), moreover, the locking grip (18, 19) of the inner ring (04), respectively, of the inner gasket ring (08) is made with the possibility of fixing in the groove (16, 17) of the gasket ring (08), respectively, of the inner ring (04) for mounting wheel bearing block. 5. The wheel bearing unit according to claim 4, characterized in that the groove (16) and the locking grip (18) of the inner rings (04) are provided on the outer perimeter of the inner rings (04), and the groove (17) and the locking grip (19) an inner spacer ring (08) is provided on the inner perimeter of the inner spacer ring (08). 6. The wheel bearing unit according to claim 4, characterized in that the groove (16) and the locking grip (18) of the inner rings (04) are provided on the inner perimeter of the inner rings (04), and the groove (17) and the locking grip (19) an inner spacer ring (08) is provided on the outer perimeter of the inner spacer ring (08). 7. Wheel bearing unit according to one of paragraphs. 3-6, characterized in that the inner gasket ring (07) on its end faces has at least one slot (20) extending along the axis. 8. The wheel bearing unit according to claim 1, characterized in that it has a seal (21) located respectively between the inner ring (04) and the inner spacer ring. 9. The wheel bearing unit according to claim 1, characterized in that it comprises an outer seal, which is located respectively between the outer rings and the outer spacer ring.

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