DE102007049050A1 - Radial needle roller bearing arrangement e.g. for gearings, arranged between two rotatable parts and includes gearbox with radial needle roller bearings has bearing sleeve and bearing cage pins - Google Patents

Abstract

The radial needle roller such as a needle sleeve is arranged between two rotatable parts (2, 3, 4) and includes a gearbox (1). The radial needle roller bearings (6) have a bearing sleeve (7), and bearing cage (8) pins. The radial needle roller bearings (6) are applied as one of the parts (4) and the bearing sleeve (7) is designed so that it is formed on an axial contact surface (10, 11) for the part (2). An independent claim is included for use of the arrangement.

Description

The The invention relates to an arrangement of a radial needle bearing, in particular a needle sleeve, between two mutually rotatable Parts, in particular a transmission, wherein the radial needle roller bearings a bearing sleeve, a bearing cage and needles.

in the In general, roller bearings consist of two bearing rings integrated raceways. Between the rings are rolling elements arranged, which roll on the raceways. Be as rolling elements Balls, cylindrical rollers, needle rollers, tapered rollers and barrel rollers used. A cage usually carries the rolling elements, keeps them evenly spaced and prevents them from touching each other. at Needle bearings provides the cage additionally for the correct position of the rolling body axis.

roller bearing for predominantly radial loads are called Radial bearings. Cylindrical roller bearings, such as needle roller bearings, needle sleeves and needle rings are only radially resilient. Is there only little installation space available in the radial direction, as in gearboxes, needle rings, needle roller bearings with or without Inner ring used with low cross-sectional height.

The circular cylindrical rolling elements of these needle roller bearings have one in relation to the rolling element diameter great length. As a result, they have a very low Frame size and are therefore often in gearboxes used. Especially with needle bearings is often on one Inner ring omitted. A needle bearing without inner ring is called needle sleeve designated.

From the DE 38 05 707 A1 a radial roller bearing is known which consists of a thin-walled, in particular drawn from sheet metal bearing sleeve in the bore cylindrical rolling preferably roll bearing needles, which are housed in a cage, wherein the bearing sleeve has at its one axial end a radially inwardly angled board, against the cage can start axially. The bearing sleeve is divided at its end opposite the board into a plurality of peripheral portions, of which each successive are alternately angled radially inwardly and radially outwardly. At the radially outwardly angled peripheral portions, a ring of polymeric material is attached, which has at least one extending over the circumference, axially directed sealing lip on one of the bearing sleeve facing radial surface. Within the bearing sleeve a sealing ring made of polymeric material is used in a space between the radially inwardly angled peripheral portions on the one hand and the adjacent end of the cage verdrehtest on the smooth surface of a bearing mounted in the radial roller bearing shaft or inner ring and the at least a sealing lip slidably rests in the bore of the bearing sleeve.

From the DE 102 16 137 A1 is a thrust washer for planetary gears in a planetary gear known, which is arranged with its receiving bore in a Planetenradträger planetary pin and fixed on both sides planetary gears, which are rotatably mounted on a Wälzlageranordnung on the Planetenradbolzen. The thrust washer has a deviating from the circular shape circumferential geometry and is arranged in the planet carrier in a negative contour to this circumferential geometry.

In contrast, the object of the present invention is an arrangement of a Radial needle bearing between two mutually rotatable parts to create the simpler and cheaper to manufacture is and is also able to absorb certain axial loads.

These The object is achieved by the reproduced in claim 1 arrangement.

Thereby, that the radial needle bearing rests against one of the parts and the Bearing sleeve is designed such that the bearing sleeve forms an axial contact surface for this part, Can easily do without the usual use from thrust washers an axial thrust surface and a stop be provided by the warehouse.

at the parts can be z. B. a gear shaft, a bearing block or a transmission housing act. On the other hand it is too possible that the second part is a shoulder of the same Wave acts.

If the arrangement has a non-cutting bearing sleeve, which has an edge pointing to the other part, which is used to form the axial abutment surface is formed, the bearing can through made easy deep drawing and beading of the edge become. Another chipping or sanding post is thus no longer necessary.

Of the Edge can be either inward or outward, only be converted to the inside or only outward to the contact surface train.

is the edge can only be reshaped to the inside, by suitable assembly the axial position can be selected, for. B. by choice the Einpresstiefe that a suitable arrangement of the camp or his sleeve is guaranteed.

In an embodiment, the edge of the bearing sleeve in the axial contact surface depressions for a Have lubricant. This can be useful depending on the use to ensure adequate lubrication due to a possible Relative movement between contact surface and rotating Part to provide.

The For example, pits can be made by imprinting be formed formed pockets or waves.

There the sleeve now due to the chosen design is loaded axially and the rolling elements no longer axially fixed, z. B. by the second edge of the bearing sleeve, it makes sense if the bearing cage of the radial bearing for axial fixing of the rolling elements is formed. For this purpose, the bearing cage an at least partially reshaped Having edge, axially fixing with the bearing sleeve interacts. Thus, the bearing cage and therefore are the Rolling elements axially fixed. So the bearing cage from its side facing away from the contact surface a have circumferential groove, into which engages the bearing sleeve.

preferably, it is in the two mutually rotatable parts to a shaft and a gear or a bearing block of a transmission. Here come the advantages of the small size of the Needle roller bearings and the certain axial load capacity especially beautiful.

Especially It is advantageous if the radial needle bearing as a contact surface for a reverse gear wheel of a Motor vehicle is used, since there the load is small.

The Task is thus summarized by the use of the reshaped Edge of a non-cutting manufactured bearing sleeve of a radial needle bearing as axial contact surface for a rotating Part solved.

Further details, features and advantages of the invention will become apparent from the following description of an embodiment with reference to the single drawing, in which a section through a section of a transmission 1 a motor vehicle in the region of a reverse idler gear 5 is shown.

The gear 1 includes a housing 2 with a bearing block 3 on which a wave 4 with the thus frictionally connected Rückwärtsgangzwischenrad 5 is supported.

Between the end areas of the shaft 4 and the bearing block 3 or housing 2 each is a radial needle roller bearing 6 arranged in the form of a needle sleeve, which is a bearing sleeve 7 a storage cage 8th and needles 9 having. The warehouse 6 is in corresponding holes in the housing 2 or bearing block 3 pressed.

With his needles 9 is the camp 6 on the wave 4 on and in a reduced diameter end portion.

The non-cutting bearing sleeve 7 has a reverse gear 5 or middle section of the shaft 4 pointing edge 10 having, for the formation of the axial thrust surface 11 is transformed to the outside.

This is the radial needle roller bearing 6 with his sleeve 7 or the reshaped edge 10 so by the difference in diameter of the areas of the shaft 4 formed shoulder 12 on that the bearing sleeve 7 their axial contact surface 11 formed.

Because of its geometry, the sleeve is 7 or the warehouse 6 capable of providing low axial loads in the housing in addition to its actual task 2 or the bearing block 3 transferred to.

The sleeve 7 is used as a thrust washer and ensures that there is no relative movement between the shaft 4 , which is made of steel, and the relatively soft aluminum housing 2 can occur.

Thus, wear on the aluminum parts can be avoided. To ensure this function is the fit of bearings 6 and housing 2 or bearing block 3 so chosen that the sleeve 7 always in the case 2 or bearing block 3 is fixed, z. B. by suitable pressing (see above).

Because of the sleeve geometry of the rolling elements axially in the direction of the shaft 4 is no longer fixed, is the bearing cage 8th designed so that it assumes the axial fixation of the rolling elements or is designed for axial fixation of the rolling elements.

For this purpose, the bearing cage 8th an at least partially reshaped shoulder 12 opposite edge 13 on that with the bearing sleeve 7 interacting axially. Thus, the bearing cage and therefore the rolling elements are axially fixed.

The camp cage 8th points to it from the contact surface 11 opposite side a circumferential groove 14 on, in which the bearing sleeve 7 with its correspondingly shaped edge 15 intervenes.

1

transmission

2

casing

3

bearing block

4

wave

5

Rückwärtsgangzwischenrad

6

Radial needle bearing

7

bearing sleeve

8th

bearing cage

9

needles

10

edge

11

approach surface

12

shoulder

13

edge

14

groove

15

edge

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3805707 A1 [0005]
• DE 10216137 A1 [0006]

Claims (10)

Arrangement of a radial needle bearing ( 6 ), in particular a needle sleeve, between two mutually rotatable parts ( 2 . 3 . 4 ), in particular a transmission ( 1 ), wherein the radial needle bearing ( 6 ) a bearing sleeve ( 7 ), a bearing cage ( 8th ) and needles ( 9 ), characterized in that the radial needle bearing ( 6 ) so on one of the parts ( 4 . 12 ) and the bearing sleeve ( 7 ) is configured such that the bearing sleeve ( 7 ) an axial contact surface ( 10 . 11 ) for this part ( 12 ) trains. Arrangement according to claim 1, characterized in that the non-cutting bearing sleeve ( 7 ) one to the other part ( 12 ) pointing edge ( 10 ), which is used to form the axial contact surface ( 11 ) is transformed. Arrangement according to claim 2, characterized in that the edge ( 10 ) to the inside and to the outside, only to the inside or only to the outside is formed. Arrangement according to claim 2 or 3, characterized in that the edge ( 10 ) has recesses for a lubricant in the axial thrust surface. Arrangement according to claim 4, characterized that the depressions as formed by embossing pockets or waves are formed. Arrangement according to one of the preceding claims, characterized in that the bearing cage ( 8th ) of the radial bearing ( 6 ) is designed for axial fixation of the rolling elements. Arrangement according to claim 6, characterized in that the bearing cage ( 8th ) an at least partially reshaped edge ( 13 ), which is connected to the bearing sleeve ( 7 ) interacts axially fixing. Arrangement according to one of the preceding claims, characterized in that the parts of a shaft ( 4 ) and a gear ( 5 ) or a bearing block ( 3 ) or housing ( 2 ) of a transmission ( 1 ) are. Use of the formed edge of a non-cutting bearing sleeve ( 7 ) of a radial needle bearing ( 6 ) as axial contact surface ( 11 ) for a rotating part ( 4 . 12 ). Use according to claim 9, characterized in that the radial needle bearing as a contact surface ( 11 ) for a reverse idler gear ( 5 ) of a motor vehicle.