DE102019125232A1 - Roller bearing arrangement - Google Patents

Abstract

The invention relates to a rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4), rolling elements (5) and a cage (6), the inner ring (3) having an inner ring rim (7) and an inner ring raceway (8) and the outer ring (4) has an outer ring rim (9) and an outer ring raceway (10), the rolling elements (5) between the inner ring (3) and the outer ring (4) being rotatable from one another in the cage (6) are arranged spaced apart, the rolling elements (5) rolling on the inner ring raceway (8) and the outer ring raceway (10), the rolling elements (5) being designed as rolling element rollers (11), the inner ring (3) exactly one inner ring rim (7) and the outer ring (4) has exactly one outer ring rim (9), the inner ring rim (7) and the outer ring rim (9) being arranged at axially opposite ends of the roller bearing (2).

Description

The invention relates to a rolling bearing arrangement comprising a rolling bearing with an inner ring, an outer ring, rolling elements and a cage, the inner ring having an inner ring rim and an inner ring raceway and the outer ring having an outer ring rim and an outer ring raceway, the rolling elements between the inner ring and the outer ring being rotatable in the Cage are arranged spaced from each other, wherein the rolling elements roll on the inner ring raceway and the outer ring raceway and wherein the rolling elements are designed as rolling element rollers.

Rolling bearing arrangements for mounting a crankshaft are well known. For example, the JP2014199033 A and the JP2015059622A a roller bearing arrangement for a crankshaft of an internal combustion engine of a motor vehicle, wherein on-board roller bearings are used. Furthermore, from the US9441672B as well as from the JP4320599 B2 Cages for receiving rolling elements or manufacturing processes for cages for rolling bearings are known.

In addition, roller bearing arrangements for mounting crankshafts are also known from the applicant's offer.

There is a continuing need to improve the ease of assembly of the generic rolling bearing arrangements.

It is therefore the object of the invention to provide a roller bearing arrangement with a roller bearing, as a result of which assembly in a crankshaft arrangement is further simplified. In particular, a roller bearing arrangement is to be created for mounting a crankshaft in a crankshaft housing for a motorcycle, which is simplified with regard to assembly and disassembly in the crankshaft housing.

This object is achieved by a roller bearing arrangement with the features of claim 1. The roller bearing arrangement according to the invention comprises a roller bearing with an inner ring, an outer ring, rolling elements and a cage, the inner ring having an inner ring rim and an inner ring raceway and the outer ring having an outer ring rim and an outer ring raceway , wherein the rolling elements are rotatably arranged between the inner ring and the outer ring in the cage at a distance from one another, the rolling elements rolling on the inner ring raceway and the outer ring raceway, the rolling elements being designed as rolling element rollers. According to the invention, the inner ring has exactly one inner ring rim, and the outer ring has precisely one outer ring rim, the inner ring rim and the outer ring rim being arranged at axially opposite ends of the roller bearing.

This achieves the advantage that one roller bearing arrangement, in particular a roller bearing arrangement for a crankshaft of a motorcycle, is provided, which is optimized with regard to assembly for different crankshaft types and allows simplified assembly or disassembly.

First, the individual elements of the claimed subject matter of the invention are explained in the order in which they are named in the set of claims and particularly preferred embodiments of the subject matter of the invention are described below.

Rolling bearings can in particular be used to transmit rotary movements with the lowest possible friction losses. Rolling bearings can be used in particular for positioning axles and shafts, and depending on the design, they absorb radial and / or axial forces and at the same time enable the rotation of the shaft or the components mounted on an axle in this way.

For this purpose, rolling elements are arranged between an inner ring and an outer ring of the roller bearing. Between these three main components, the inner ring, outer ring and the rolling elements, mainly rolling friction usually occurs within the rolling bearing. Since the rolling elements in the inner and outer ring can preferably roll on hardened steel surfaces with optimized lubrication, the rolling friction of such bearings is relatively low.

The inner ring can, in particular, connect the shaft receiving the roller bearings to the roller bearing or the roller bodies. In particular, the shaft can be connected to the side of the outer surface of the inner ring facing the shaft, with the rolling elements of the roller bearing rolling on the inner ring raceway opposite this outer surface. The inner ring can be formed from a metallic and / or ceramic material. It is basically conceivable to design the inner ring in one piece or in several parts, in particular in two parts.

The outer ring can in particular connect the bearing receiving the roller bearing to the roller bearing or the roller bodies. In particular, the bearing can be connected to the side of the outer ring surface facing the bearing, with the outer ring raceway opposite this outer ring rolling the rolling elements of the rolling bearing. The outer ring can be formed from a metallic and / or ceramic material. It is basically conceivable to design the outer ring in one piece or in several parts, in particular in two parts.

The rolling elements have the shape of a ball or a roller, depending on the type of rolling bearing. They roll on the raceways of the rolling bearing and have the task of transmitting the force acting on a radial rolling bearing from the outer ring to the inner ring and vice versa. In an axial rolling bearing, the rolling elements transmit the forces acting on the axial rolling bearing between the running disks. Roller-shaped rolling bodies are also referred to as roller-rolling bodies and spherical rolling bodies as bearing balls.

A roller bearing can have a cage, the cage guiding the rolling elements. The cage is designed in such a way that the rolling element balls and / or the rolling element rollers are spaced apart from one another so that, for example, the friction and heat generation of the rolling elements is kept as low as possible. Furthermore, the cage keeps the rolling element balls and / or rolling element rollers at a fixed distance from one another when they roll, whereby a uniform load distribution can be achieved. The cage can be made in one piece or in several pieces.

The rolling elements can roll within the rolling bearing, in particular on the inner ring raceway of the inner ring. For this purpose, the surface of the inner ring raceway can advantageously be made correspondingly wear-resistant, for example also by means of a corresponding surface treatment method and / or by applying a corresponding additional material layer.

The inner ring raceway can be flat or profiled. A profiled design of the inner ring raceway can be used, for example, to guide the rolling elements on the inner ring raceway. A planar shape of the inner ring raceway, on the other hand, can allow, for example, a certain axial displaceability of the rolling bodies on the inner ring raceway.

The rolling elements can roll within the rolling bearing, in particular on the outer ring raceway of the outer ring. For this purpose, the surface of the outer ring raceway can advantageously be made correspondingly wear-resistant, for example also by means of a corresponding surface treatment method and / or by applying a corresponding additional material layer.

The outer ring raceway can be flat or profiled. A profiled configuration of the outer ring raceway can be used, for example, to guide the rolling elements on the outer ring raceway. A planar formation of the outer ring raceway can, however, allow for example a certain axial displaceability of the rolling bodies on the outer ring raceway.

In comparison to bearing balls, which have point-like contact on the raceways of the outer and / or inner ring, roller rolling elements have linear contact and consequently a larger contact surface. As a result, roller rolling elements can withstand significantly higher radial loads than bearing balls with a high degree of rigidity.

According to a preferred embodiment of the invention, it can be advantageous that the cage has an M-shaped cross-sectional profile. It can thus be achieved in an advantageous manner that the assembly of the rolling bearing arrangement in a crankshaft application for a motorcycle is further simplified and the rolling element rollers are securely held by the cage in the rolling bearing in the bearing rings, which are axially open on one side.

It can furthermore be advantageous that the inner ring is designed as a shaft section of a crankshaft, in particular a crankshaft for a motorcycle.
The advantage of this embodiment is that it provides a roller bearing arrangement that is easy to assemble and inexpensive to manufacture for high-speed crankshaft applications in the motorcycle and motorcycle sector.

In a further development of the invention, it can furthermore be preferred that the inner ring and / or the outer ring are designed as a component produced by cold forming. In this way it can be achieved that the production of the roller bearing arrangement is further simplified and optimized with regard to production costs.

The invention will be explained in more detail below with reference to figures without restricting the general inventive concept. The figures are merely of a schematic nature and are used exclusively for understanding the invention. The same elements are provided with the same reference symbols. The different features of the various exemplary embodiments can also be freely combined with one another within what is technically feasible.

The only figure in the drawing 1 , shows a roller bearing arrangement according to the invention in a partial axial section in a schematic representation.

The 1 shows a roller bearing arrangement according to the invention 1 , comprising a roller bearing 2 with an inner ring 3rd , an outer ring 4th , Rolling elements 5 and a cage 6th , the inner ring 3rd an inner ring rim 7th and an inner ring raceway 8th has and the outer ring 4th an outer ring rim 9 and an outer ring raceway 10 having. As rolling element rollers 11 trained rolling elements 5 are between inner ring 3rd and outer ring 4th rotatable in the cage 6th arranged at a distance from one another and roll on the inner ring raceway 8th and the outer ring raceway 10 from. According to the invention, the inner ring 3rd exactly one inner ring rim 7th on, and has the outer ring 4th exactly one outer ring rim 9 on, with the inner ring rim 7th and the outer ring rim 9 at axially opposite ends of the roller bearing 2 are arranged.

The 1 also shows that the cage 6th has an M-shaped cross-sectional profile. The outer legs of the M-shaped profile, seen in cross section, have a radial height that is essentially the radial distance between the two free ends of the inner ring rim 7th and outer ring rim 9 corresponds to. The cage 6th has an axial width which is dimensioned such that the two outer legs of the M-shaped profile, seen in cross section, are in the area of the inner ring rim 7th and outer ring rim 9 are arranged - the cage 6th In other words, it is only slightly narrower than the rolling bearing 2 with its through inner ring 3rd and outer ring 4th defined maximum width.

The inner ring is preferred 3rd designed as a shaft section of a crankshaft, not shown, in particular a crankshaft for a motorcycle or a motorcycle. About the roller bearing designed according to the invention 2 the crankshaft is mounted in a crankshaft housing.

The invention is not limited to the embodiments shown in the figures. The above description is therefore not to be regarded as restrictive but rather as explanatory. The following patent claims are to be understood in such a way that a named feature is present in at least one embodiment of the invention. This does not exclude the presence of further features. If the patent claims and the above description define “first” and “second” features, this designation serves to distinguish between two similar features without defining an order of precedence.

List of reference symbols

1

Roller bearing arrangement

2

roller bearing

3

Inner ring

4th

Outer ring

5

Rolling elements

6th

Cage

7th

Inner ring rim

8th

Inner ring raceway

9

Outer ring rim

10

Outer ring raceway

11

Rolling element rollers

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• JP 2014199033 A [0002]
• JP 2015059622 A [0002]
• US 9441672 B [0002]
• JP 4320599 B2 [0002]

Claims (4)

Rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4), rolling elements (5) and a cage (6), the inner ring (3) having an inner ring rim (7) and an inner ring raceway ( 8) and the outer ring (4) has an outer ring rim (9) and an outer ring raceway (10), the rolling elements (5) between the inner ring (3) and the outer ring (4) being rotatably arranged in the cage (6) at a distance from one another, wherein the rolling elements (5) roll on the inner ring raceway (8) and the outer ring raceway (10), and wherein the rolling elements (5) are designed as rolling element rollers (11), characterized in that the inner ring (3) has exactly one inner ring rim (7) and the outer ring (4) has exactly one outer ring rim (9), the inner ring rim (7) and the outer ring rim (9) being arranged at axially opposite ends of the roller bearing (2). Rolling bearing arrangement (1), according to Claim 1 , characterized in that the cage (6) has an M-shaped cross-sectional profile. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the inner ring (3) is designed as a shaft section of a crankshaft, in particular a crankshaft for a motorcycle. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the inner ring (3) and / or the outer ring (4) is / are designed as a component produced by cold forming.

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