DE102010043599A1 - Bearing arrangement for shaft of vehicle, has fastening element for axial fixing of bearing inner ring, which is deformable clamping element with preset elastic modulus between inner ring and rotational torque transferring component - Google Patents

Abstract

The bearing arrangement has a multi-row rolling bearing (2) which comprises a split bearing inner ring (3) and a rotational torque transferring component (5) arranged on a shaft (1). A fastening element is provided for axial fixing of the bearing inner ring. The fastening element is a deformable clamping element (4) with a predetermined elastic modulus, which is provided between the inner ring and rotational torque transferring component. An independent claim is included for method for axially fixing split bearing inner ring of multi-row rolling bearing on shaft of vehicle.

Description

The present invention relates to a bearing assembly for a shaft of a vehicle and a method for axially fixing the bearing assembly according to the closer defined in the preamble of claim 1 and 5, respectively.

From vehicle technology shaft bearings are known, which can accommodate both radial loads and axial loads in both directions. Usually, multi-row roller bearings are provided with a split bearing inner ring. For clamping the bearing inner rings, a clamping nut or a Spannverschraubung be used, however, must be secured against unintentional loosening. With such a bracing, the arrangement of adjacent components requires elaborate shaft gradations and further axial securing.

For example, from the document DE 10 2008 007 780 A1 a bearing assembly is known in which a demolition nut is provided with a shear-off screw ring as a permanent and subsequently not to be opened screw. The demolition nut is tightened until the predetermined breaking point of the threaded ring shears off when screwed on, as a setpoint torque is transmitted. Due to the friction effects occurring between the demolition nut and the inner ring of the bearing, however, no exact constant clamping force is not ensured even at a constant torque in a disadvantageous manner.

Furthermore, from the document DE 102 58 515 B4 a planetary gear known, in which the planet carrier is mounted on a cross roller bearing with a split inner ring. For axial fixing two components are provided, which are clamped together by bolts. Even with this type of fixation there is the problem that no predefined bracing force can be applied.

The present invention is based on the object to propose a bearing assembly and a method of the types described above, with which as constructively as possible a defined clamping force for fixing the bearing are applied.

This object is achieved by the features of claim 1 and 5 respectively. Further advantageous embodiments will be apparent from the respective dependent claims and the drawings.

The object underlying the invention is achieved by a bearing assembly for a shaft of a vehicle with at least one multi-row rolling bearing with split bearing inner ring and with at least one torque transmitting component, wherein for axial fixing or securing the bearing inner rings a fastening member is provided. According to the invention, at least one deformable bracing element or the like with a predetermined modulus of elasticity is provided as the fastening element. The bracing is realized in an advantageous manner by the existing torque-transmitting component.

Thus, an optimized axial clamping is realized in the split bearing inner ring of the multi-row, axially loaded roller bearing. In the proposed bearing arrangement, the number of components of the simplified bearing inner ring stress is minimized by the use of only one axial tension element in an advantageous manner. On the otherwise commonly used screw release fuse can be omitted, since the bracing is supported on the existing torque-transmitting component. As a result, the manufacturing costs of the proposed bearing arrangement can be reduced and, in addition, the assembly can be simplified.

In the proposed bearing arrangement, the bracing element is preferably arranged axially between the bearing inner ring to be clamped and the torque-transmitting component. Due to the fixed axial end position of the torque transmitting component, the clamping element can be deformed accordingly due to its selected stiffness. The deformability is determined by the selected modulus of elasticity, so that a precisely defined clamping force can be applied to the bearing inner ring. In the context of an advantageous embodiment of the invention, the axial end position of the torque-transmitting component is selected on the shaft such that a desired tension of the bearing inner ring is realized by the deformed bracing.

The axial attachment or fixations or securing the torque-transmitting component can be done in any way. For example, by a snap ring, a snap ring, a retaining ring or by a screw. The axial securing of the torque-transmitting component can be used in an advantageous manner for securing the bracing element. As a result, additional components can be saved.

The object underlying the invention is also by a method for axially fixing a split bearing inner ring of a multi-row rolling bearing on a shaft of a vehicle with at least one torque-transmitting component and solved with at least one fastening member, wherein axially on the split bearing race a deformable clamping element is applied as a fastening member and then the torque transmitting component is mounted on the shaft and is axially pressed against the Verspannelement until the predetermined axial position of the torque transmitting Component is achieved.

Upon reaching the axial end position of the torque transmitting component on the shaft, the clamping element is deformed such that the predefined clamping force is applied due to the selected modulus of elasticity of the Verspannelementes on the bearing inner ring.

With the proposed method, a fixation of the split bearing inner ring of the rolling bearing is realized in the simplest way, which can be removed again when required by simply loosening the torque-transmitting component.

The present invention will be further explained with reference to the drawings. Show it:

1 a schematic view of a possible embodiment of a bearing assembly according to the invention;

2 a sectional view of the bearing assembly in the untensioned state of a Verspannelements;

3 a sectional view of the bearing assembly in the clamped state of the Verspannelements;

4 a sectional view of the bearing assembly according to 3 with fixed torque transmitting component.

In the figures, different views of a bearing arrangement according to the invention for a shaft 1 a vehicle with at least one multi-row rolling bearing 2 with split bearing inner ring 3 shown.

In 1 is a schematic representation of the bearing assembly shown, from which the operation is to be illustrated. On a wave 1 is the double row rolling bearing 2 which has a split bearing inner ring 3 having two associated inner rings. For axial fixings the bearing inner ring is located 3 on the one hand at a shoulder of the shaft 1 and on the other hand on the bracing element 4 , In this way, occurring loads in the axial direction of the rolling bearing 2 be recorded, as indicated by a double arrow.

To a predefined clamping force on the split bearing inner ring 3 to be able to apply is called Verspannelement 4 used a deformable component with a predetermined modulus of elasticity or stiffness. The tension is caused by a torque transmitting component 5 realized. The torque transmitting component 5 is for example via a flank toothing 6 with the wave 1 rotatably connected by being axially on the shaft 1 or axially to the flank toothing 6 is pushed until the axial end position of the torque transmitting component 5 on the wave 1 is reached.

This is the bracing 4 deformed so that it due to its selected stiffness the exact predefined clamping force on the bearing inner ring 3 applies. This is in the schematic representation by the wave-shaped deformation of the Verspannelements 4 indicated, with the deformability in any direction and type can be done.

For the axial fixation of the torque-transmitting component 5 on the wave 1 becomes an axial lock 7 , used for example in the form of a retaining ring or the like. As a result, not only the torque-transmitting component 5 , but also the bracing element 4 and thus also the divided bearing inner ring 3 of the rolling bearing 2 axially secured. As is apparent from the figures, results due to the inventively provided Axialverspannung a particularly simple contour of the shaft 1 because, for example, consuming wave machining can be omitted.

The also proposed method for axially fixing the split bearing inner ring 3 of the multi-row rolling bearing 2 on the shaft 1 of a vehicle is determined by the 2 to 4 clarified in more detail.

In 2 is the wave 1 with the preassembled rolling bearing 2 and the already on the shared bearing inner ring 3 adjacent clamping element 4 shown. This illustration shows the bracing element 4 in the untensioned state, since the torque transmitting component 5 not mounted yet.

According to 3 is the assembly of the torque transmitting component 4 shown, wherein the component 4 axially on the shaft 1 or on the flank toothing 6 deferred until the component 4 has reached the axial end position. This is the bracing 3 axially compressed or elastically deformed. At the elastic Deformation becomes a predefined bracing force on the adjacent bearing inner ring 3 applied.

In 4 the finished mounted bearing assembly is shown, in this illustration is the torque transmitting component 5 by means of axial securing 7 on the shaft 1 axially fixed.

LIST OF REFERENCE NUMBERS

1

wave

2

roller bearing

3

divided bearing inner ring

4

bracing

5

torque transmitting component

6

profile teeth

7

axial safety

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008007780 A1 [0003]
• DE 10258515 B4 [0004]

Claims (6)

Bearing arrangement for a shaft ( 1 ) of a vehicle, with at least one multi-row rolling bearing ( 2 ) with split bearing inner ring and with at least one on the shaft ( 1 ) arranged torque transmitting component ( 5 ), wherein for axially fixing the bearing inner ring ( 3 ) a fastening element is provided, characterized in that as a fastening member at least one by the torque transmitting component ( 5 ) deformable tensioning element ( 4 ) is provided with a predetermined modulus of elasticity. Arrangement according to claim 1, characterized in that the bracing element ( 4 ) axially between the bearing inner ring ( 3 ) and the torque transmitting component ( 5 ) is braced. Arrangement according to one of the preceding claims, characterized in that the axial end position of the torque-transmitting component ( 5 ) on the shaft ( 1 ) is selected such that by the deformed Verspannelement a predefined depending on the predetermined modulus of elasticity Verspannkraft on the bearing inner ring ( 3 ) can be applied. Arrangement according to one of the preceding claims, characterized in that the torque-transmitting component ( 5 ) on the shaft ( 1 ) positively and / or non-positively by means of an axial lock ( 7 ) is fixed. Method for axially fixing a split bearing inner ring ( 3 ) of a multi-row rolling bearing ( 2 ) on a shaft ( 1 ) of a vehicle having at least one torque-transmitting component ( 5 ) and with at least one fastening element, characterized in that axially on the split bearing inner ring ( 3 ) a deformable tensioning element ( 4 ) is applied as a fastening member and that thereafter the torque transmitting component ( 5 ) on the shaft ( 1 ) and axially to the Verspannelement ( 4 ) is pressed until the predetermined axial end position of the component ( 5 ) is achieved. A method according to claim 5, characterized in that upon reaching the axial end position of the torque transmitting component ( 5 ) on the shaft ( 1 ) the tensioning element ( 4 ) is deformed such that the predefined bracing force due to the grouted elastic modulus of the Verspannelementes ( 4 ) on the bearing inner ring ( 3 ) is applied.

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