DE102020111507A1 - Rolling bearing arrangement and gear 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), and with rolling elements (5) arranged between the inner ring (3) and the outer ring (4), the inner ring ( 3) has an inner ring raceway and the outer ring (4) has an outer ring raceway between which the rolling elements (5) roll, and wherein the roller bearing (2) is arranged on a shaft (8), the inner ring (3) of the roller bearing (2 ) has first form-locking means (9) on its side facing the shaft (8), and that the shaft (8) has second form-locking means (10) corresponding to the first form-locking means (9), which in an assembled state of the roller bearing (2) the shaft (8) interact in such a way that an axially non-slip connection between the inner ring (3) and the shaft (8) is ensured.

Description

The invention relates to a rolling bearing arrangement, comprising a rolling bearing with an inner ring, an outer ring, and with rolling elements arranged between the inner ring and the outer ring, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway between which the rolling elements roll, and the rolling bearing on one Shaft is arranged. In addition, the present invention relates to a transmission arrangement comprising such a roller bearing arrangement.

In the DE 10 2017 120 761 A1 a roller bearing designed as a needle bearing is described, which is provided for mounting a gear shaft of a motor vehicle transmission, with a sleeve, in particular an outer ring, rolling on the sleeve and a cage rotatably receiving the rollers, the sleeve forming an axial stop for the cage Has collar. The collar has at least one lubricating opening for supplying a lubricant. The lubrication opening in the collar of the sleeve enables sufficient lubrication even at a low delivery pressure, so that sufficient lubrication of bearings in a motor vehicle transmission is made possible.

Further roller or needle bearings are, for example, in the U.S. 3,572,860 A and the US 2005 252328 A described.

In light of the previously known prior art, it is therefore the object of the subject matter of the invention to provide a roller bearing arrangement in which the fixed seat of the roller bearing on a shaft is improved. An axial displaceability of the roller bearing on the shaft should advantageously be reliably prevented.

This object is achieved by a roller bearing arrangement with the features of claim 1 and by a gear arrangement with the features of claim 6 Has inner ring raceway and the outer ring has an outer ring raceway between which the rolling elements roll, and wherein the roller bearing is arranged on a shaft. According to the invention, the inner ring of the roller bearing has first form-locking means on its inner ring surface facing the shaft, and the shaft has second form-locking means corresponding to the first form-locking means. The form-locking means are designed in such a way that an axially non-slip connection between the inner ring and the shaft is ensured when the roller bearing is mounted on the shaft. This has the advantage that a roller bearing fixedly mounted on a shaft is fixed in place in the axial position.

The roller bearing of the roller bearing arrangement according to the invention is preferably configured with roller bodies configured as rollers. The roller bearing is particularly preferably designed as a needle roller bearing.

Needle rollers of roller bearings are geometrically designed as circular cylinders, which have a very large length in relation to the rolling element diameter. As a rule, when the length / diameter ratio of a circular cylindrical rolling element roller is> 2.5, one speaks of a needle roller. Particularly compact roller bearings, the so-called needle roller bearings, can be realized by means of needle rollers.

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 to fix axles and shafts, and depending on the design, they absorb radial and / or axial forces and at the same time enable the shaft or the components mounted on an axle to rotate.

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 that receives 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 transferring 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. The rolling elements can roll inside 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.

According to a preferred embodiment of the invention, it can be advantageous that the first form-locking means have at least one spring element projecting radially inward in the direction of the axis of rotation, and that the second form-locking means have at least one spring element that cooperates with the spring element according to the tongue-and-groove principle as a groove have formed groove element. It can thus be achieved in an advantageous manner that an axially fixed positioning of a roller bearing on a shaft is realized with structurally simple means.

It can furthermore be advantageous that the groove element is designed as an L-shaped groove on the outer circumferential surface of the shaft. The advantage of this embodiment is that a structurally simple solution for the secure positioning of a roller bearing on a shaft is provided with regard to the assembly of the roller bearing on the shaft. An inner ring with its spring element can be pushed onto the shaft via the long L-leg extending parallel to the axis of rotation of the shaft and rotated at the end of the long leg into the short L-leg of the groove so that it is secured against further axial movement . In a further development of the invention, it can furthermore be preferred that the spring element is designed as a hemispherical extension.

Furthermore, it can be advantageous that the shaft is designed as a shaft of a gear arrangement, the shaft being able to be arranged on a free axial end via the roller bearing in the housing of the gear arrangement.

In addition, the object on which the invention is based is achieved by a gear arrangement comprising a shaft with a plurality of gear wheels arranged in a rotationally fixed manner on this, the shaft being rotatably mounted on at least one of its two free axial ends via a roller bearing arrangement in the housing of the gear arrangement and wherein the roller bearing arrangement is formed by a roller bearing arrangement according to the invention.

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.

• 1 eine Getriebeanordnung mit einer über ein Wälzlager im Getriebegehäuse gelagerten Welle in einer schematischen Schnittdarstellung,
• 2 einen Teilausschnitt eines freien axialen Endes einer Welle mit nutartig ausgebildeten Formschlussmitteln in einer schematischen Darstellung,
• 3 eine Schnittdarstellung eines Innenrings einer erfindungsgemäß ausgebildeten Wälzlageranordnung in schematischer Darstellung, und
• 4 eine Schnittdarstellung eines auf einer Welle angeordneten Innenrings in schematischer Darstellung mit einer möglichen Ausgestaltung einer Formschlussverbindung zwischen Innenring und Welle.

Show it:

• 1 a gear arrangement with a shaft mounted in the gear housing via a roller bearing in a schematic sectional view,
• 2 a partial section of a free axial end of a shaft with groove-like form-locking means in a schematic representation,
• 3 a sectional representation of an inner ring of a roller bearing arrangement designed according to the invention in a schematic representation, and
• 4th a sectional illustration of an inner ring arranged on a shaft in a schematic illustration with a possible configuration of a form-fit connection between the inner ring and the shaft.

1 shows a gear arrangement 13th with one over a rolling bearing arrangement 1 with roller bearings 2 shaft mounted in the gear housing 8th in a schematic sectional view. The gear arrangement 13th includes a shaft 8th with a plurality of transmission gears connected to it in a rotationally fixed manner, the shaft 8th at least one of its two free axial ends via a Roller bearing arrangement 1 in the housing of the gear assembly 13th is arranged rotatably mounted and wherein the roller bearing assembly 1 is designed according to the invention. This illustration clearly shows that the rolling bearing 2 as needle roller bearings with roller bodies designed as needles 5 is formed, which over its inner ring 3 with the wave 8th connected and with its outer ring 4th is arranged in the transmission housing.

the 2 shows a partial section of a free axial end of a shaft 8th with as a groove element 12th trained positive locking means 10 in a schematic representation. The groove element 12th is an L-shaped groove on the outer surface of the shaft 8th designed such that one on the shaft 8th Fixed inner ring to be attached 3 of a rolling bearing 2 with a spring element 11 in the manner of a bayonet lock against axial displacement on the shaft 8th is secured.

the 3 shows a sectional view of an inner ring 3 a roller bearing arrangement designed according to the invention 1 in a schematic representation. It can be clearly seen that the spring element 11 than in the inner surface of the, the shaft 8th facing wall is formed embedded spherical element which protrudes with a hemispherical extension from the annular surface in the manner of a spring.

the 4th shows a roller bearing arrangement 1 , comprising a roller bearing 2 with an inner ring 3 , an outer ring 4th , and with between the inner ring 3 and outer ring 4th arranged rolling elements 5 , the inner ring 3 has an inner ring raceway and the outer ring 4th has an outer ring raceway between which the rolling elements 5 roll off, and with the rolling bearing 2 on a wave 8th is arranged, the inner ring 3 of the rolling bearing 2 on its the wave 8th facing side first form-fitting means 9 has, and that the shaft 8th with the first form-fitting means 9 corresponding second form-fitting means 10 having, in an assembled state of the rolling bearing 2 on the wave 8th cooperate in such a way that an axially non-slip connection between the inner ring 3 and wave 8th is guaranteed.

the 4th shows a schematic sectional view of a on a shaft 8th arranged inner ring 3 of a rolling bearing 2 in a schematic representation with a possible configuration of a form-fit connection between the inner ring and the shaft. The inner ring 3 has form-locking means as the first 9 a hemispherical spring element protruding radially inward in the direction of the axis of rotation 11 on. The hemispherical spring element 11 is formed by a ball that goes into that of the shaft 8th facing inner surface of the inner ring 3 is introduced and protrudes hemispherically from this. The second in the wave 8th trained form-fit means 10 have at least one with the spring element 11 groove element cooperating according to the tongue and groove principle 12th on. It is easy to see here that the inner ring 3 up to the end of the long L-leg on the shaft 8th is postponed. Combined with 2 is illustrated that the inner ring 3 at the end of the long L-leg rotated by approximately 90 ° and with its spring element 11 in the short L-legs of the groove element 12th screwed in and so against axial displacement on the shaft 8th is secured.

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

8th

wave

9

first form-fit means

10

second form-fit means

11

Spring element

12th

Groove element

13th

Gear arrangement

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

• DE 102017120761 A1 [0002]
• US 3572860 A [0003]
• US 2005252328 A [0003]

Claims (6)

Rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4), and with rolling elements (5) arranged between the inner ring (3) and the outer ring (4), the inner ring (3) having an inner ring raceway and the outer ring (4) has an outer ring raceway between which the rolling elements (5) roll, and wherein the rolling bearing (2) is arranged on a shaft (8), characterized in that the inner ring (3) of the rolling bearing (2) has first form-locking means (9) on its side facing the shaft (8), and that the shaft (8) has second form-locking means (10) corresponding to the first form-locking means (9), which in a mounted state of the roller bearing (2) on the Shaft (8) interact in such a way that an axially non-slip connection between the inner ring (3) and shaft (8) is guaranteed. Rolling bearing arrangement (1) according to Claim 1 , characterized in that the first form-locking means (9) have at least one spring element (11) protruding radially inwards in the direction of the axis of rotation, and that the second form-locking means (10) have at least one which interacts with the spring element (11) according to the tongue and groove principle Have groove element (12). Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the groove element (12) is designed as an L-shaped groove on the outer circumferential surface of the shaft (8). Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the spring element (11) is designed as a hemispherical extension. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the shaft (8) is designed as a shaft of a gear arrangement (13), the shaft (8) at a free axial end over the rolling bearing (2) in the housing of the gear arrangement (13) stored can be arranged. Gear arrangement (13), comprising a shaft (8) with a plurality of gear wheels arranged in a rotationally fixed manner on this, the shaft (8) being rotatably supported at at least one of its two free axial ends via a roller bearing arrangement (1) in the housing of the gear arrangement (13) is arranged, wherein the roller bearing arrangement (1) is designed according to one of the preceding claims.

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