DE102018127903A1 - Bearing arrangement and gear device with the bearing arrangement - Google Patents

Abstract

To accommodate radial and axial loads between two bearing partners, it is known to combine a radial bearing with an axial bearing. The invention has for its object to propose a combined radial-axial bearing, which is characterized by a simple and quick assembly.
For this purpose, a bearing arrangement 2 with a ball bearing 7, the ball bearing 7 having an inner ring 8 and an outer ring 9 and a plurality of balls 10 arranged between the inner ring 7 and the outer ring 9, with an axial bearing 6, the axial bearing 6 with respect to a Axis of rotation D is arranged coaxially on an axial end face of the ball bearing 7, proposed, the axial bearing 6 being captively connected to the ball bearing 7 via a snap connection 16, so that the ball bearing 7 and the axial bearing 6 form a common structural unit.

Description

The invention relates to a bearing arrangement with the features of the preamble of claim 1. Furthermore, the invention relates to a gear device with the bearing arrangement.

To accommodate radial and axial loads between two bearing partners, it is known to combine a radial bearing with an axial bearing. The radial bearing and the axial bearing can be designed as two separate bearing units. Alternatively, however, it is also known to integrate the thrust bearing into the radial bearing, so that the thrust bearing and the radial bearing form a common structural unit. For this purpose, the inner ring of the axial bearing can at the same time form a contact surface for the axial bearing, so that the rolling bodies can start the axial bearing directly on the inner ring.

The publication JP 2005 249 189 A , which is probably the closest state of the art, describes a pair of load-bearing roller bearings consisting of an axial bearing, which only absorbs the axial load, and a radial bearing, which only absorbs the radial load, the axial bearing and the radial bearing sharing a bearing ring.

Furthermore, the document WO 2008 088 801 A1 known which has a double clutch transmission with a first and a second drive gearwheels which are rotatable about a first axis, a first drive shaft which has a plurality of gearwheels defining a gear stage which are rotatable about a second axis which lies parallel to the first axis, disclosed. The first drive shaft is torsionally connected to the first drive gear via a first clutch that is rotatable about the second axis. The dual clutch transmission has a second drive shaft which has a plurality of gearwheels which define a gear stage and are rotatable about the second axis, the second drive shaft being connected torsionally to the second drive gearwheel via a second clutch which is rotatable about the second axis. Furthermore, the double clutch transmission has an output shaft with gear wheels which mesh with the gear wheels defining a gear stage of the first and the second drive shaft.

It is an object of the present invention to propose a combined radial-axial bearing which is characterized by simple and quick assembly.

This object is achieved by a bearing arrangement with the features of claim 1 and by a gear device with the features of claim 10. Preferred or advantageous embodiments of the invention result from the subclaims, the description below and the attached figures.

The invention relates to a bearing arrangement, which is designed and / or suitable in particular for a transmission device, preferably a vehicle transmission. The bearing arrangement is preferably used to accommodate radial and axial loads. The bearing arrangement is particularly preferably designed as a combined axial-radial bearing.

The bearing arrangement has a ball bearing, as a radial bearing, which is used in particular to absorb the radial load. The ball bearing is preferably designed as a deep groove ball bearing. The ball bearing has an inner ring and an outer ring and a plurality of balls arranged to roll between the inner ring and the outer ring. The balls are preferably received in a ball bearing cage and are guided at a distance from one another in a circumferential direction. The ball bearing cage can preferably be designed as a snap cage or alternatively as a window cage.

The bearing arrangement has an axial bearing, which is used in particular to absorb the axial load. The axial bearing is arranged coaxially to the ball bearing with respect to an axis of rotation, the axis of rotation being defined in particular by an axis of rotation of the ball bearing. The axial bearing is arranged on an axial end face of the ball bearing, in particular the inner ring and / or the outer ring. For this purpose, the axial bearing is preferably supported in the axial direction with respect to the axis of rotation on an axial end face of the inner ring and / or the outer ring.

In the context of the invention, it is proposed that the axial bearing be captively connected to the ball bearing via a snap connection, so that the ball bearing and the axial bearing form a common structural unit. The axial bearing and the ball bearing preferably each form an independently functional bearing unit. The axial bearing is preferably detachably connected to the ball bearing via the snap connection. In particular, the axial bearing is positively connected to the ball bearing in the axial and / or radial direction with respect to the axis of rotation.

The advantage of the invention is that a particularly simple and inexpensive assembly of the bearing arrangement is implemented by fastening the axial bearing via a snap connection to the ball bearing. In addition, the storage unit can be delivered as a pre-assembled unit, so that the handling of the storage arrangement during the delivery process and during final assembly is significantly improved. Through the simple design, the bearing arrangement can also be manufactured inexpensively.

In a preferred embodiment, it is provided that the axial bearing has an inner running disk, an outer running disk and a plurality of rolling bodies arranged to roll between the inner and the outer running disk. The outer race is arranged on a side of the axial bearing facing away from the ball bearing and the inner race is arranged on a side of the axial bearing facing the ball bearing. It is particularly preferred for the inner running disk to rest in sections on the end face of the ball bearing, in particular the end face of the inner and / or the outer ring. Specifically, the inner race can contact the end face of the inner and / or outer ring over the entire surface, in particular over the entire surface. The rolling elements are in particular guided in an axial bearing cage, which is arranged captively between the inner race and the outer race.

The inner race is connected to the inner ring or the outer ring of the ball bearing via the snap connection. In particular, the inner race is releasably clipped onto the inner or outer ring via the snap connection. The snap connection can be implemented by a snap hook connection or a ring snap connection. The inner running disk is preferably held in the axial and / or radial direction via the snap connection on the inner or outer ring. The inner race and / or the outer race can each be designed as a sheet metal component.

A further specification provides that the inner ring or the outer ring has a circumferential snap groove. In particular, the snap groove is designed as a continuous annular groove. The snap groove is preferably made at the edge of the inner or outer ring. The inner running disk has a snap section corresponding to the snap groove, which engages with the snap groove at least in sections to form the snap connection. Preferably, at least or exactly the snap portion for mounting the inner race on the inner or outer ring is elastically deformable. In principle, the snap section can have a continuous latching lug, so that the snap connection is designed as the ring snap connection. However, the snap section preferably has a plurality of latching lugs which are evenly spaced apart from one another in the circumferential direction, so that the snap connection is designed as a segmented ring snap connection or the snap hook connection.

In a further specific constructive embodiment it is provided that the inner running disk, viewed in cross-section, is formed in a Z-shape, a first cross leg forming the snap section and a second cross leg forming a support section for the axial bearing cage for guiding the rolling elements of the axial bearing. In particular, the snap section and the support section, viewed in a rough form, are each designed as a cylindrical extension. In particular, the axial bearing cage is supported on the support section in the radial direction and / or is held captively in the axial direction with respect to the axis of rotation, in particular in a form-fitting manner, by the support section. A longitudinal leg connecting the two cross legs forms an inner run-up section, the rolling bodies rolling on the inner run-up section. In particular, the inner run-up section extends in a radial plane with respect to the axis of rotation, the inner run-up section preferably being designed in the form of a ring. In particular, the inner run-on section forms a run-up surface for the rolling elements, in particular a ring surface.

In a specific development, it is provided that the outer running disk, viewed in cross section, is L-shaped, with one longitudinal leg forming an outer run-up section, the rolling elements rolling on the outer run-up section. The outer run-up section extends in a further radial plane with respect to the axis of rotation and / or parallel to the inner run-up section.

A further transverse leg adjoining the further longitudinal leg forms a further support section for the axial bearing cage. In particular, the axial bearing cage is supported on the one hand in the radial direction on the one support section and in the radial opposite direction on the other support section. The axial bearing cage is preferably arranged captively between the two support sections. In particular, the inner and outer running disks are each connected to the axial bearing cage via a further snap connection. In particular, the inner race and the outer race are each positively connected to the axial bearing cage in the axial and / or radial direction, a relative rotation of the inner race to the outer race in the circumferential direction with respect to the axis of rotation being permissible at the same time.

In a constructive implementation it is provided that the inner ring has at least or exactly one inner rim. The inner ring preferably has an inner rim on both sides. In particular, the inner rim forms the part of the inner ring which is adjacent to a raceway, in particular a raceway, of the inner ring and / or for guidance the ball bearing cage. The snap groove is made in the inboard or in one of the two inboard. The snap section is thus arranged between the inner ring and the outer ring and / or on a radial outer side of the inner ring. Alternatively, the snap groove is made in an inner circumference of the inner ring. The snap section is thus arranged outside the ball bearing on a radial inside of the inner ring.

In a further constructive implementation it is provided that the outer ring has at least or exactly one outboard. The outer ring preferably has an outboard on both sides. In particular, the outboard forms the part of the outer ring which is adjacent to a raceway, in particular a raceway, of the outer ring and / or is used to guide the ball bearing cage. Alternatively, the snap groove is made in the outboard or in one of the two outboards. The snap section is thus arranged between the inner ring and the outer ring and / or on a radial inside of the outer ring. Alternatively, the snap groove is made in an outer circumference of the outer ring. The snap section is thus arranged outside the ball bearing on a radial outside of the outer ring.

The inboard or outboard provided with the snap groove can be extended in the axial direction with respect to the axis of rotation, so that the snap section is spaced in the axial direction from the ball bearing cage and a collision of the snap section with the ball bearing cage is excluded. Alternatively or optionally additionally, the inboard or outboard provided with the snap groove can be offset radially at least in sections, so that the snap section is sunk and a collision of the snap section with the ball bearing cage is excluded.

In a further implementation of the invention it is provided that the inner ring has a radially inward shaft shoulder. In particular, the inner ring can bear against the shaft shoulder in the radial direction on an outer circumference of a shaft and / or in the axial direction on a shaft shoulder of a shaft. An inner diameter of the shaft shoulder is greater than or equal to an inner diameter of the axial bearing. This ensures that the axial bearing, in particular the inner and / or the outer running disk, does not protrude into the bore of the inner ring in the radial direction with respect to the axis of rotation and that the inner ring can be pushed onto the shaft completely or unhindered.

Alternatively or optionally additionally, the outer ring has a radially outwardly directed housing shoulder. In particular, the outer ring can bear against the inner shoulder of a housing and / or another gear component, for example a further bearing device, in the radial and / or in the axial direction via the housing shoulder. An outer diameter of the housing shoulder is greater than or equal to an outer diameter of the thrust bearing. This ensures that the axial bearing, in particular the inner and / or the outer running disk, does not protrude beyond the outer ring in the radial direction with respect to the axis of rotation and that the outer ring can be inserted completely or unhindered into the housing.

In a preferred embodiment it is provided that the axial bearing is designed as an axial needle bearing. The rolling elements are preferably designed as cylindrical rollers, in particular as needle rollers. In particular, the rolling elements have a length in the radial direction that is at least twice as large as the diameter of the respective rolling element. The radial bearing cage is designed in particular as a sheet metal cage, preferably as a window cage.

Another object of the invention relates to a gear device with the bearing arrangement according to one of the preceding claims or as has already been described above. In particular, the transmission device is designed and / or suitable for a vehicle. The transmission device is preferably designed as a gear transmission. The transmission device has at least one transmission component and at least one transmission shaft. The gear component can be designed as the gear housing or the bearing device.

Furthermore, the gear device has at least one gear wheel, the gear wheel being arranged coaxially and / or concentrically with the gear shaft. In particular, the gear wheel can be rotated relative to the gear shaft. For this purpose, the gear wheel can be designed as a ring gear, the gear shaft being guided through the gear wheel. The gearwheel is preferably designed as a gearwheel. The bearing arrangement is supported in the radial direction with respect to the axis of rotation on the gear shaft and / or on the gear component. The bearing arrangement, in particular the ball bearing, is preferably supported on the one hand with the inner ring on the transmission shaft and on the other hand with the outer ring on the at least one transmission component, in particular on the transmission housing and / or the bearing device. Alternatively or optionally additionally, the bearing arrangement is supported on the gear wheel in the axial direction. The bearing arrangement, in particular the axial bearing, is preferably supported on the one hand with the outer running disk on the gear wheel and on the other hand with the inner running disk on the ball bearing, in particular the inner and / or outer ring.

• 1 in einer stark schematisierten Darstellung einen Teilausschnitt einer Getriebevorrichtung mit einer Lageranordnung;
• 2 in einer Schnittdarstellung die Lageranordnung aus 1 als ein Ausführungsbeispiel der Erfindung.

Further features, advantages and effects of the invention result from the following description of preferred exemplary embodiments of the invention and the attached figures. Show:

• 1 in a highly schematic representation, a partial section of a transmission device with a bearing arrangement;
• 2nd in a sectional view of the bearing arrangement 1 as an embodiment of the invention.

1 shows in a highly schematic representation a partial view of a transmission device 1 , which can be designed, for example, as an automated manual transmission for a motor vehicle. The gear device 1 has a bearing arrangement 2nd , a transmission component 3rd , a gear shaft 4th as well as a gear wheel 5 on.

The gear wheel 5 is designed, for example, as a spur gear and can be engaged with a further gear wheel, not shown, to form a gear stage. The gear wheel 5 can be designed as a ring gear, the gear shaft 4th through the gear wheel 5 passed through and relative to the gear 5 about an axis of rotation D can rotate. The axis of rotation D can thereby through a longitudinal axis of the gear shaft 4th be defined, the gear 5 coaxial to the axis of rotation D is arranged.

The gear component 3rd is designed, for example, as a gear housing, the gear components, in particular the bearing arrangement 2nd and the gear wheel 5 , are arranged in the gear housing. The bearing arrangement 2nd serves to accommodate a radial and an axial load and is designed as a combined axial-radial bearing. For this purpose, the bearing arrangement 2nd a thrust bearing 6 to accommodate an axial load and a ball bearing 7 , as a radial bearing, to accommodate a radial load. The bearing arrangement 2nd is coaxial to the axis of rotation D arranged, the ball bearing 7 in the radial direction on the one hand on a radial inside of the transmission component 3rd and on the other hand in a radial opposite direction on an outer circumference of the transmission shaft 4th is supported. In the axial direction with respect to the axis of rotation D is the thrust bearing 6 on the one hand on the gear wheel 5 and in an axial opposite direction on the other hand on the ball bearing 7 supported.

2nd shows in a sectional view along the axis of rotation D an exemplary embodiment of the bearing arrangement 2nd out 1 as an embodiment of the invention. The ball bearing 7 is designed as a deep groove ball bearing and has an inner ring 8th , an outer ring 9 as well as several between the inner ring 8th and the outer ring 9 rolling balls 10th on. The balls 10th are in a ball bearing cage 11 guided and rotating around the axis of rotation D evenly spaced from each other in the ball bearing cage 11 added. The ball bearing cage 11 is designed as a plastic cage, in particular a snap cage, the ball bearing cage 11 towards the thrust bearing 6 is open. The inner ring 8th has an inboard on both sides 8a , b and the outer ring 9 has an outboard on both sides 9a , b on. The two inner and outer shelves 8a , b ; 9a , b form the part of the inner and outer ring 8th , 9 , which is arranged outside the respective raceway, in particular the raceway, and delimit a rolling space in the radial direction and for guiding the ball bearing cage 11 can serve.

The thrust bearing 6 is designed as an axial needle bearing and has an inner race 12th , an outer race 13 as well as several between the inner and outer runner 12th , 13 Rolling rolling elements 14 on. The rolling elements 14 are designed as cylindrical rollers, the rolling elements 14 in a thrust bearing cage 15 guided and rotating around the axis of rotation D evenly spaced from each other in the thrust bearing cage 15 are included. The thrust bearing cage 15 is designed, for example, as a sheet metal cage, in particular a window cage. The inner race 12th is on one of the ball bearings 7 facing side and the outer race 13 on one of the ball bearings 7 opposite side of the thrust bearing 6 arranged. The inner race 12th lies in the axial direction on an axial end face of the inner ring 8th and in the radial direction on an outer circumference of the inner ring 8th at.

The thrust bearing 6 is captive on the inner ring 8th of the ball bearing 7 via a snap connection 16 fixed. For this purpose, the inner race disc 12th a snap section 12a and the ball bearing 7 one in the inner shelves 8a of the inner ring 8th introduced snap groove 17th on. The snap groove 17th is designed as a circumferential annular groove, the snap portion 12a at least in sections with the snap groove 17th is engaged. The the snap groove 17th with inboard 8a is in the axial direction with respect to the axis of rotation D extended. This ensures that the snap section 12a to the ball bearing cage 11 is spaced and a collision of the ball bearing cage 11 with the snap section 12a is prevented.

The snap section 12a is formed by several snap-in lugs, which are made in the direction of rotation in relation to the axis of rotation D are regularly spaced from each other. The axial bearing is used for assembly 6 with the inner race 12th on the inner ring 8th attached, the locking lugs are elastically deformed and then into the snap groove 17th click into place.

The inner race 12th is Z-shaped when viewed in cross-section, with a first cross leg forming the snap section 12a , a second cross leg a support section 12c for the thrust bearing cage 15 and a longitudinal leg connecting the two transverse legs has an inner run-on section 12b for the rolling elements 14 forms. The inner startup section 12b is designed as an annular disc and extends with respect to the axis of rotation D in a radial plane, one of the rolling elements 14 facing ring surface an inner contact surface for the rolling elements 14 forms. The snap section 12a and the support section 12c are at least approximately cylindrical, with the snap section 12a in the axial direction with respect to the axis of rotation D to an outer diameter and the support portion 12c in an axial opposite direction to an inner diameter of the inner run-up section 12b connects.

The outer race 13 is L-shaped when viewed in cross-section, with a cross leg a further support section 13a and a longitudinal leg an outer run-up section 13b for the rolling elements 14 forms. The further support section 13a is at least approximately cylindrical and coaxial and / or concentric with the support section 12c the inner race 12th arranged. The outer startup section 13b is also designed as an annular disc and extends parallel to the inner run-up section 12b in a further radial plane, one of the rolling elements 14 facing ring surface an outer contact surface for the rolling elements 14 is trained.

The thrust bearing cage 15 is supported in the radial direction on the support section 12c the inner race 12th and in a radial opposite direction on the further support section 13a the outer race 13 from. One is the inner race 12th over the support section 12c and on the other hand the outer race 13 over the further support section 13a captive with the thrust bearing cage 15 connected so that the outer race 13 in the axial and radial direction with respect to the axis of rotation D fixed and in the direction of rotation relative to the inner race 12th is rotatable.

Reference symbol list

1

Gear device

2nd

Bearing arrangement

3rd

Gear component

4th

Gear shaft

5

Gear wheel

6

Thrust bearing

7

ball-bearing

8th

Inner ring

8a, b

Inner shelves

9

Outer ring

9a, b

Outboards

10th

Bullets

11

Ball bearing cage

12

Inner race

12a

Snap section

12b

inner startup section

12c

Support section

13

Outer race

13a

further support section

13b

outer start section

14

Rolling elements

15

Thrust bearing cage

16

Snap connection

17th

Snap groove

D

Axis of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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 2005249189 A [0003]
• WO 2008088801 A1 [0004]

Claims (10)

Bearing arrangement (2) with a ball bearing (7), the ball bearing (7) having an inner ring (8) and an outer ring (9) and a plurality of balls (10) arranged to roll between the inner ring (7) and the outer ring (9), With an axial bearing (6), the axial bearing (6) being arranged coaxially with respect to an axis of rotation (D) on an axial end face of the ball bearing (7), characterized in that the axial bearing (6) is captively secured by a snap connection (16) is connected to the ball bearing (7) so that the ball bearing (7) and the thrust bearing (6) form a common structural unit. Bearing arrangement (2) after Claim 1 , characterized in that the axial bearing (6) has an inner race (12), an outer race (13) and a plurality of rolling elements (15) arranged to roll between the inner and the outer race (12, 13), the inner race (12) over the snap connection (16) is connected to the inner ring (8) or the outer ring (9) of the ball bearing (7). Bearing arrangement (2) after Claim 2 , characterized in that the inner ring (8) or the outer ring (9) has a circumferential snap groove (17), the inner race (12) having a snap portion (12a) corresponding to the snap groove (17), which is connected to the snap groove (17 ) is engaged at least in sections. Bearing arrangement (2) after Claim 3 , characterized in that, viewed in cross-section, the inner running disk (12) is Z-shaped, a first cross leg the snap section (12a) and a second cross leg a support section (12c) for an axial bearing cage (15) of the axial bearing (6) forms, and wherein a longitudinal leg connecting the two transverse legs forms an inner run-up section (12b) for the rolling elements (14). Bearing arrangement (2) after Claim 4 , characterized in that the outer running disk (13) is L-shaped when viewed in cross-section, one longitudinal leg forming an outer run-on section (13b) for the rolling elements (14) and a transverse leg adjoining the longitudinal leg forming a further supporting section (12a) for the thrust bearing cage (15). Bearing arrangement (2) according to one of the Claims 3 to 5 , characterized in that the snap groove (17) is made in an inner rim (8a, b) of the inner ring (8), or in that the snap groove (17) is made in an inner circumference of the inner ring (8). Bearing arrangement (2) according to one of the Claims 3 to 5 , characterized in that the snap groove (17) is made in an outer rim (9a, b) of the outer ring (9), or in that the snap groove (17) is made in an outer periphery of the outer ring (9). Bearing arrangement (2) according to one of the preceding claims, characterized in that the inner ring (8) has a radially inwardly directed shaft shoulder, wherein an inner diameter of the shaft shoulder is greater than or equal to an inner diameter of the axial bearing (6), and / or that Outer ring (9) has a radially outwardly directed housing shoulder, an outer diameter of the housing shoulder being greater than or equal to an outer diameter of the axial bearing (6). Bearing arrangement (2) according to one of the preceding claims, characterized in that the axial bearing (6) is designed as an axial needle bearing. Gear device (1) with the bearing arrangement (2) according to one of the preceding claims, characterized in that the gear device (1) has at least one gear component (3), at least one gear shaft (4) and at least one gear wheel (5), the bearing arrangement (2) is supported in the radial direction with respect to the axis of rotation (D) on the gear shaft (4) and / or on the at least one gear component (3) and / or is supported on the gear wheel (5) in the axial direction.

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