FR3054623A1 - MOUNTING A BEARING BEARING IN A HOUSING OF A CARTER - Google Patents

Abstract

The invention relates to a mounting in which the bearing comprises a fixed outer member (3) which is immobilized in the housing (1) and an inner member, said members each being provided with an annular race (3a) between which are arranged cylindrical rollers (4), the outer race (3a) having an axial bearing (7), said outer member having a collar (8) having a radial bearing (8a) on which the rollers (4) abut axial through one of their lateral faces (4a), said assembly further comprising a stop ring (10) which is dissociated from the outer member (3) while being immobilized on the casing (2), said stop ring having a radial bearing surface (10a) on which the rollers (4) are axially abutted through the other of their lateral faces (4b) so as to be held axially on the outer raceway (3a).

Description

® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(only to be used for reproduction orders) © National registration number

054 623

57310

COURBEVOIE © Int Cl ⁸ : F16 C 35/067 (2017.01)

PATENT INVENTION APPLICATION

A1

©) Date of filing: 07.28.16. © Applicant (s): NTN-SNR ROULEMENTS - FR. (30) Priority: @ Inventor (s): BONNAUDET AURELIEN and LE MAR- REC THOMAS. (43) Date of public availability of the request: 02.02.18 Bulletin 18/05. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): NTN-SNR ROULEMENTS. related: ©) Extension request (s): (© Agent (s): STRATO-IP Limited liability company.

MOUNTING OF A ROLLING BEARING IN A HOUSING OF A CRANKCASE.

FR 3 054 623 - A1 _ The invention relates to an assembly in which the bearing comprises a fixed external member (3) which is immobilized in the housing (1) and an internal member, said members each being provided with an annular track ( 3a) of rolling between which are arranged cylindrical rollers (4), the external rolling track (3a) having an axial bearing (7), said external member having a collar (8) having a radial bearing (8a) on which the rollers (4) are in axial abutment via one of their lateral faces (4a), said assembly further comprising a stop ring (10) which is dissociated from the external member (3) while being immobilized on the casing (2), said stop ring having a radial bearing surface (10a) on which the rollers (4) are in axial abutment via the other of their lateral faces (4b) in order to be held axially on the outer raceway (3a).

8a, 4a

3a, 7

The invention relates to an assembly of a rolling bearing in a housing of a housing, said bearing comprising a fixed external member which is immobilized in said housing and a rotating internal member.

In a particular application, the internal member allows the rotational mounting of a shaft in a casing of a motor vehicle gearbox.

To do this, it is known that each of the members is provided with an annular rolling track between which are arranged cylindrical rollers so as to allow the rotation of the internal member around an axis.

In particular, the outer raceway has an axial reach on which the rollers are supported by means of their cylindrical periphery. Furthermore, the external member has two collars formed, in particular by machining, respectively on one side of the axial surface.

Each of the collars has a radial seat on which the rollers are in axial abutment by means of respectively one of their lateral faces. Thus, due to the U-shaped geometry imparted by the collars, the rollers are held on the axial bearing surface, in particular with respect to the axial loads that the external member may have to undergo.

After placing the rolling bearing in the housing, a stop ring can be mounted in said housing to form an axial stop at the interface between said housing and the external member. In particular, the external member may have a peripheral surface which is fitted into a complementary surface delimiting the housing, the stop ring being placed in abutment on the external side of the external collar to make the axial maintenance of the bearing in said housing more reliable.

However, this embodiment requires axially stacking the external collar and the stop ring. This results in an assembly whose axial size is increased, in particular at the level of the length of the housing which is necessary for the provision of the stop ring, or having a reduction in the bearing load capacity by reducing the length of the rollers to maintain a housing of reduced axial dimension.

The invention aims to perfect the prior art by proposing in particular an assembly in which the maintenance of the rolling bearing in the housing of a casing can be made reliable, and this without negatively impacting on its axial size and / or on the capacity of charge of his bearing.

To this end, the invention proposes mounting a rolling bearing in a housing of a casing, said bearing comprising a fixed external member which is immobilized in said housing and an internal member, said members each being provided with a annular raceway between which cylindrical rollers are arranged so as to allow the rotation of said internal member about an axis, the external raceway having an axial bearing on which the rollers are supported by means of their cylindrical periphery , said outer member having a collar formed on one side of said axial bearing, said collar having a radial bearing on which the rollers are in axial abutment via one of their lateral faces, said assembly further comprising a ring d stop which is separated from the external member by being immobilized on the casing, said stop ring being t disposed on the other side of the axial bearing surface and having a radial bearing surface on which the rollers are in axial abutment via the other of their lateral faces in order to be held axially on the outer raceway.

Other objects and advantages of the invention will appear in the following description, made with reference to the attached figures, in which:

- Figure 1 is a partial representation in front view of an assembly according to an embodiment of the invention, Figure 1a being a sectional view along the line AA of Figure 1;

- Figure 2 is a view similar to Figure 1a showing an alternative embodiment;

- Figure 3 is a partial representation in front view of an assembly according to an embodiment of the invention, Figure 3a being a sectional view along the line AA of Figure 3 and Figure 3b being a view in perspective of the stop ring of Figure 3;

- Figure 4 is a partial representation in front view of an assembly according to an embodiment of the invention, Figure 4a being a sectional view along the line AA of Figure 4.

In relation to the figures, an assembly of a rolling bearing is described below in a housing 1 of a casing 2, said bearing comprising a fixed external member 3 which is immobilized in said housing and a rotating internal member (not shown in the figures) around an X axis.

In the description, the terms "exterior" and "interior" are defined with respect to the axis X of rotation of the interior member, respectively for a location distant and close to said axis. The terms "axial" and "radial" are also defined with respect to this axis X, respectively for a direction along this axis and moving away from or approaching it.

In a particular application, the internal member allows the rotational mounting of a shaft in a casing 2 of a motor vehicle gearbox. To do this, the members 3 are each in the form of a ring, said rings being arranged concentrically around the axis X of rotation, the inner ring having a bore in which the shaft can be secured. However, the invention is not limited to a particular structure of the members 3, nor to a particular application for mounting.

In the embodiments shown, the external member 3 has a peripheral surface which is fitted into a complementary surface delimiting the housing 1. In particular, the complementary surface has an annular geometry around the axis X of rotation, and a diameter substantially equal to that of the peripheral surface of the external member 3. In a variant not shown, other types of mounting of the external member 3 in the housing can be provided, for example by using means attached to their interface.

The members 3 are each provided with an annular rolling track 3a between which are arranged cylindrical rollers 4 so as to allow the rotation of the internal member. Conventionally, a row of rollers 4 is disposed between the rolling tracks 3a while being held relative to one another by means of a cage 5.

In particular, the cage 5 has two crowns 5a, 5b and a plurality of bridges 6 extending between said crowns so as to form between two adjacent bridges 6 and a segment of each of said crowns a housing in which a roller 4 is retained in the row.

The outer raceway 3a has an axial bearing surface 7 on which the rollers 4 are supported by means of their cylindrical periphery. Similarly, the inner raceway has such an axial bearing allowing the rotation of the rollers 4 around their own axis during the rotation of the bearing.

The external member 3 has a collar 8 formed on one side of the axial surface 7. Advantageously, the collar 8 is formed in the mass of the external member 3, in particular by machining. In the embodiments shown, the housing 1 has a shoulder 9 against which the collar 8 is in axial abutment, thus defining the end of the fitting of the bearing in the housing 1 and preventing any subsequent axial movements of said bearing in the direction fitting.

The collar 8 has a radial surface 8a on which the rollers 4 are in axial abutment by means of one of their lateral faces 4a. In particular, the axial 7 and radial 8a bearing surfaces can be adjusted to give them the expected rolling properties.

The presence of the collar 8 makes it possible to maintain the row of rollers 4 on the external raceway 3a relative to the axial forces applied to the external member 3 opposite to said collar, that is to say in the direction d '' fitting. Likewise, if the inner member has to undergo such efforts, the inner raceway can be equipped with a similar collar.

The assembly further comprises a stop ring 10 which is dissociated from the external member 3, that is to say made in a separate part, by being immobilized on the casing 2, said stop ring being arranged the other side of the axial bearing 7. In particular, the bearing is fitted into the housing 1 and then the stop ring 10 is placed on the casing 2.

In the embodiments shown, the stop ring 10 is arranged in radial interference with the external member 3 so, in combination with the shoulder 9, to make the axial immobilization of the external member 3 more reliable in the housing 1.

The stop ring 10 has a radial bearing surface 10a on which the rollers 4 are in axial abutment via the other of their lateral faces 4b so as to be held axially on the outer raceway 3a. Thus, the stop ring 10 fulfills the function of a collar described above, without presenting its bulk.

In connection with FIG. 1a, the assembly can then provide a housing 1 whose axial dimension is reduced compared to that necessary for the provision of an additional collar, so as to be able to limit the axial size of the assembly.

In connection with FIG. 2, the invention can be used to increase the load capacity of the rolling bearing, without increasing the axial size of the assembly. Indeed, the space required for the provision of the additional collar can be used to increase the length of the cylindrical rollers 4, and therefore their resistance to the load.

In connection with FIGS. 1 to 3, an embodiment is described below in which the stop ring 10 has an outer ring 11 which is disposed in a groove 12 in the housing 1 to axially immobilize said stop ring. In particular, the outer ring 11 extends radially out of the groove 12 to form an axial stop for the outer member 3.

In the embodiment shown, the crown 11 has a rectangular section. As a variant, a chamfer can be provided at the rear of the crown 11 to facilitate its arrangement in the groove 12, said groove possibly also having a chamfer of complementary geometry. According to another variant, the section of the crown 11 can be trapezoidal.

Furthermore, the radial bearing surface 10a of the stop ring 10 extends inside the ring 11, projecting from the groove 12 to form an axial stop for the rollers 4. In particular, the ring stop 10 is arranged around the crown 5b of the cage 5 so as to form a stop for the rollers 4 without interfering with the rotation of said cage.

In the embodiment shown, the stop ring 10 has a split annular geometry to allow the arrangement of its outer ring 11 in the groove 12 by reversible tightening of its diameter.

In relation to FIGS. 3, the outer ring 11 of the stop ring 10 has discontinuous angular slots 13 which are distributed circumferentially, the radial range 10a extending continuously inside said slots. Thus, it is possible to use a ring 10 of large radial dimension relative to its stop functions, while being able to easily tighten it because of the bridges of reduced material 14 between the slots 13.

In relation to FIGS. 4, an embodiment is described below in which the axial surface 7 opens into a side wall 15 of the casing 2 which surrounds the housing 1. In particular, the shoulder 9 is arranged so that the opposite face of the external member 3 is disposed in the radial extension of the side wall 15 of the casing 2.

In this embodiment, the stop ring 10 can be fixed to the side wall 15 5 providing that it has at least one flange 16 for fixing to the side wall and a central bore around which the radial bearing 10a extends .

In particular, the flange 16 has an orifice through which a fixing device 17 is engaged in the side wall 15, in particular three flanges 16 and three fixing screws 17 in the embodiment shown.

Claims (9)

1. Assembly of a rolling bearing in a housing (1) of a housing (2), said bearing comprising a fixed external member (3) which is immobilized in said housing and an internal member, said members each being provided with '' an annular track (3a) between which are arranged cylindrical rollers (4) so as to allow the rotation of said inner member about an axis (X), the outer track (3a) having an axial bearing ( 7) on which the rollers (4) are supported by means of their cylindrical periphery, said external member having a collar (8) formed on one side of said axial bearing, said collar having a radial bearing (8a) on which the rollers (4) are in axial abutment via one of their lateral faces (4a), said assembly being characterized in that it further comprises a stop ring (10) which is dissociated from the external organ (3) in being immobilized on the casing (2), said stop ring being disposed on the other side of the axial bearing (7) and having a radial bearing (10a) on which the rollers (4) are in axial abutment by the intermediate of the other of their lateral faces (4b) in order to be held axially on the outer raceway (3a). 2. Assembly according to claim 1, characterized in that the external member (3) has a peripheral surface which is fitted into a complementary surface delimiting the housing (1). 3. Installation according to one of claims 1 or 2, characterized in that the housing (1) has a shoulder (9) against which the collar (8) is in axial abutment. 4. Installation according to any one of claims 1 to 3, characterized in that the housing (1) has a groove (12) in which an outer ring (11) of the stop ring (10) is arranged for immobilizing said stop ring axially, the radial bearing surface (10a) of said ring extending inside said ring projecting from said groove. 5. Assembly according to claim 4, characterized in that the stop ring (10) has a split annular geometry to allow the arrangement of its outer ring (11) in the groove (12) by reversible tightening of its 5 diameter. 6. Installation according to one of claims 4 or 5, characterized in that the outer ring (11) of the stop ring (10) has discontinuous angular slots (13) which are distributed circumferentially. 7. Installation according to any one of claims 1 to 3, characterized in that the axial bearing (7) opens into a side wall (15) of the housing (2) which surrounds the housing (1), the ring of stop (10) being fixed on said side wall. 15 8. Assembly according to claim 7, characterized in that the stop ring (10) has at least one flange (16) for fixing on the side wall (15) and a central bore around which the radial bearing (10a) stretches. 9. Installation according to claim 8, characterized in that the flange (16) 20 has an orifice through which a fixing device (17) is engaged in the side wall (15). σι 1/3 A — H