DE102016214933A1 - Arrangement for axially fixing a fixed bearing - Google Patents

Abstract

The invention relates to an arrangement for fixing a fixed bearing in an axial direction, at least comprising a gear with a gear housing, in which at least a first shaft is rotatably disposed, wherein the first shaft is rotatably supported via rolling bearings; wherein at least one rolling bearing of the first shaft is a fixed bearing and an inner bearing ring, which is arranged on a shaft, and an outer bearing ring having a first end face, an outer peripheral surface and a second end face comprises; wherein a disc-shaped bearing plate is disposed with a first abutment surface at the first end side and extending outwardly from the abutment surface in a radial direction, the bearing plate in the radial direction outside the outer bearing ring has at least one connecting portion through which the bearing plate with the Gear housing for fixing the fixed bearing is connectable; wherein the bearing plate has at least one clamping region which extends in the axial direction to the outer peripheral surface and there forms a frictional connection with the outer bearing ring.

Description

The invention relates to an arrangement for clamping / fixing a fixed bearing in an axial direction. The fixed bearing is in particular a fixed bearing of a shaft of a transmission, in particular a conical-pulley belt transmission, preferably a CVT transmission (continuously variable transmission), particularly preferred for a motor vehicle. In particular, the (cone pulley wrap) gear is used in conjunction with an internal combustion engine or other drive unit for driving a motor vehicle.

Such a conical-pulley belt transmission regularly comprises at least a first conical pulley pair and a second conical pulley pair each having a first conical disk displaceable in an axial direction and a second conical disk fixed in the axial direction and a belting means arranged for transmitting torque between the conical pulley pairs. The first conical disk pair is arranged on a first shaft and the second conical disk pair is arranged on a second shaft. The shafts are rotatably mounted in each case via roller bearings with respect to a gear housing enclosing said components.

Such a conical pulley is z. B. from the WO 2011/148474 A1 known. The fixed or clamped in the axial direction arrangement of designed as a bearing bearings is here to ensure within the gear housing. In this case, to determine the fixed bearing on the gear housing here is a bearing plate is used, which extends from connection points with the gear housing in the radial direction inwardly, so that at least the outer bearing ring is fixed in the axial direction. The bearing plate is already arranged together with the bearing on the shaft and is then positioned together with the shaft on the gear housing. The connection between the bearing plate and the gear housing takes place from outside the gear housing via screws. In order to allow engagement of the screw thread in a thread on the bearing plate, the bearing plate against the bearing must have a certain amount of play.

But this game also complicates the positioning of the bearing plate within the gear housing.

On this basis, the present invention has the object, at least partially overcome the known from the prior art disadvantages. In particular, the fixed or tensioned in the axial direction arrangement of a bearing designed as a bearing roller bearing should be made possible within the gear housing, the assembly should be simplified and the determination of the fixed bearing can be ensured.

The object is solved by the features of the independent claim. Advantageous developments are the subject of the dependent claims. The features listed individually in the claims can be combined in a technologically meaningful manner and can be supplemented by explanatory facts from the description and details of the figures, with further embodiments of the invention are shown.

The invention relates to an arrangement for fixing a fixed bearing in an axial direction, at least comprising a gear with a gear housing, in which at least a first shaft is rotatably disposed, wherein the first shaft is rotatably supported via rolling bearings; wherein at least one rolling bearing of the first shaft is a fixed bearing and an inner bearing ring disposed on the first shaft, and an outer bearing ring having a first end face, an outer peripheral surface and a second end face comprises; wherein a disc-shaped bearing plate is disposed with a first abutment surface at the first end side and extending outwardly from the abutment surface in a radial direction, the bearing plate in the radial direction outside the outer bearing ring has at least one connecting portion through which the bearing plate with the Gear housing for fixing the fixed bearing is connectable; wherein the bearing plate has at least one clamping region which extends in the axial direction to the outer peripheral surface and there forms a frictional connection with the outer bearing ring.

Positive connections require a normal force on the surfaces to be joined together. Their mutual displacement is prevented, as long as the counter-force caused by the static friction is not exceeded.

The end faces each face in the axial direction and are spaced from each other by the outer circumferential surface in the axial direction. The disc-shaped bearing plate is designed in particular ring-shaped and extends fully around the first shaft. The fixed bearing is arranged in particular in the axial direction between the gear housing and the bearing plate, so that is determined by the attachment of the bearing plate to the transmission housing fixed bearing on the outer bearing ring to the transmission housing or arranged clamped.

In a rolling bearing, a distinction is made between a fixed bearing and a floating bearing. The fixed bearing transmits forces acting in all directions. In a floating bearing, there is no connection in one or two of the three directions in space. It is used if the static certainty is to be maintained when storing a body several times.

The fixed bearing at one end of a shaft serves as a radial support and at the same time fixes the shaft axially in both axial directions. It must therefore be mounted both on the shaft and on a housing. Suitable bearings are especially radial bearings that can accommodate combined loads, eg. B. deep groove ball bearings, double row or mating single row angular contact ball bearings, self-aligning ball bearings, spherical roller bearings or tapered roller bearings. Combinations of a radial bearing that can only absorb radial loads, eg. As a cylindrical roller bearing with a ring without rims, with a deep groove ball bearing, four-point or double-sided thrust bearing, can also be used as a fixed bearing (unit). The second bearing then takes over the axial preload in both directions, but must be installed with radial play. d. H. it must be ensured in the housing a bearing clearance.

Such fixed bearing units (also the mentioned combinations of rolling bearings) are referred to below as a fixed bearing.

In particular, the transmission is a conical pulley, wherein in the gear housing at least the first shaft with a first conical disk pair and a second shaft with a second pair of conical disks each having a first conical disk displaceable in the axial direction and a second conical disk fixed in the axial direction and a Torque transmission between the cone pulley pairs arranged wrapping means are arranged; wherein the shafts are rotatably supported respectively via rolling bearings.

Preferably, the bearing plate has a plurality of clamping regions, which are distributed uniformly along a circumferential direction and each form a non-positive connection with the outer bearing ring.

In particular, the bearing plate has a plurality of connecting portions, which are uniformly distributed along a circumferential direction, wherein the bearing plate via each connecting portion with the gear housing for fixing the fixed bearing is connectable. In particular, each connecting portion has a thread, via which the respective connecting portion can be fastened with a screw to the transmission housing.

In particular, the at least one clamping region and the at least one connecting section are arranged spaced apart in the circumferential direction.

According to a preferred embodiment, the bearing plate has a plurality of clamping regions and a plurality of connecting portions; wherein the clamping portions and connecting portions are alternately and uniformly spaced from each other in the circumferential direction.

In particular, the bearing plate has exactly three clamping region and three connecting sections.

According to a further preferred embodiment, the at least one clamping region is arranged on a, at least in the radial direction elastically deformable support arm extending from a base body of the bearing plate, starting at least in a circumferential direction to the clamping region. The support arm is elastically deformed outwardly in the radial direction, in particular during assembly of the bearing plate on the outer bearing ring, so that the retaining arm exerts a clamping force on the outer bearing ring via the clamping region. The support arm has a much better elastic deformability than the main body of the bearing plate.

The outer bearing ring can also be arranged on the bearing plate in the course of a pre-assembly via the at least one clamping region, whereby positioning of the bearing plate on the fixed bearing is ensured by the clamping action. Thus, the bearing plate can be arranged together with the fixed bearing (and possibly together with the first shaft) in the transmission housing and connected from outside the transmission housing via the connecting portions with the transmission housing. Due to the clamping action between the clamping area and outer bearing ring, the bearing plate relative to the outer bearing ring z. B. in the circumferential direction, so that a connecting means (eg., A screw) is correctly positioned on the connecting portion. Next allows z. B. an elastically deformable support arm and a displacement of the bearing plate in the radial direction, so that connecting means are as simple as possible connected to the connecting portion.

In particular, the holding arm extends in addition (to the circumferential direction), starting from the base body, along the axial direction to the clamping area. The clamping area is on the Outer peripheral surface of the outer bearing ring arranged. The holding arm thus extends from a base body, which also includes the contact surface of the bearing plate on the first end face of the outer bearing ring, in the axial direction over the outer peripheral surface of the outer bearing ring to the clamping region.

Preferably, the bearing plate is a sheet metal part, wherein the at least one clamping region is arranged in the axial direction spaced from the contact surface, wherein the clamping region is made by bending. In particular, the bearing plate is additionally produced by punching and / or by machining.

It is further proposed an assembly for the arrangement described here, comprising a bearing designed as a bearing and a rolling bearing located on the disc-shaped bearing plate; wherein the bearing plate has a plurality of clamping regions elastically deformable at least in the radial direction, wherein the non-deformed clamping regions are arranged on a first diameter, wherein the first diameter is smaller than a second diameter of an outer peripheral surface of an outer bearing ring of the rolling bearing, on which Disc-shaped bearing plate is to be arranged.

Before the assembly of the bearing plate and roller bearings, the clamping regions of the bearing plate are therefore not deformed elastically in particular. Only by the assembly of the bearing plate and roller bearings, the elastically deformable clamping portions are bent so that they are arranged on the second diameter of the outer peripheral surface.

Furthermore, a motor vehicle is proposed in which an arrangement according to the invention comprising a (conical pulley wrapping) transmission transmits a torque of a drive unit to the wheels of the motor vehicle.

The present invention enables a fixed bearing can be fixed in a simple and reproducible manner to a transmission housing. In this case, even a "blind" mounting of the fixed bearing (ie without visual contact with the fixed bearing) is possible because the bearing plate can be positioned with the connecting portions in an adjustable fixed position to the first shaft. Connecting means can thus be easily connected to the connecting portions of the bearing plate.

The comments on the arrangement apply equally to the assembly and the motor vehicle and vice versa.

The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments, to which the invention is not limited. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. Like reference numerals designate like objects. Show it:

1 : an arrangement in a side view;

2 : a detail of the arrangement according to 1 according to a side view in section;

3 a section of an assembly in a perspective view in section;

4 : the assembly according to 3 in a perspective view;

5 : the bearing plate according to 3 and 4 in a plan view along the axis of rotation; and

6 : the bearing plate according to 5 in a perspective view.

1 shows an arrangement 1 in a side view. The order 1 includes a (cone pulley wrapping) gear 4 with a transmission housing 5 in which a first wave 6 with a first cone pulley pair 7 and a second wave 8th with a second cone pulley pair 9 each with one in an axial direction 3 displaceable first cone pulley 10 and one in the axial direction 3 fixed second cone pulley 11 and one for torque transmission between the conical disk pairs 7 . 9 arranged belting 12 are arranged. The waves 6 . 8th are each about rolling bearings 13 in a circumferential direction 25 around a rotation axis 29 rotatably mounted. The first wave 6 is here about a camp 2 opposite the gearbox 5 rotatably mounted.

2 shows a detail of the arrangement 1 according to 1 in a side view in section. The order 1 establishing a fixed camp 2 in an axial direction 3 includes a gearbox 4 with a transmission housing 5 in which a first wave 6 is rotatably disposed, wherein the first shaft 6 over rolling bearings 13 is rotatably mounted. A rolling bearing 13 the first wave 6 is a permanent camp 2 and includes an inner bearing ring 14 who is on the first wave 6 is arranged, and an outer bearing ring 15 who has a first frontal 16 , an outer peripheral surface 17 and a second end face 18 , A disc-shaped bearing plate 19 is with a first contact surface 20 at the first end 16 arranged and extends starting from the contact surface 20 in a radial direction 21 outward. The bearing plate 19 points in the radial direction 21 outside the outer bearing ring 15 a connection section 22 (here with a hole 32 ), over which the bearing plate 19 with the gearbox 5 for the determination of the fixed camp 2 is connectable.

The front ends 16 . 18 each point in the axial direction 3 and are through the outer peripheral surface 17 in the axial direction 3 spaced apart. The disc-shaped bearing plate 19 is annular and extends fully around the first shaft 6 , The camp 2 is in the axial direction 3 between the gearbox 5 and the bearing plate 19 arranged so that by fixing the bearing plate 19 on the gearbox 5 the camp 2 over the outer bearing ring 15 on the gearbox 5 is arranged or clamped.

3 shows a section of an assembly 28 in a perspective view in section. The assembly 28 for the arrangement described here 1 includes one as a fixed bearing 2 executed rolling bearing 13 and one on the rolling bearing 13 can be arranged disc-shaped bearing plate 19 , The bearing plate 19 has a plurality of, at least in the radial direction 21 elastically deformable clamping areas 23 on, with the clamping area 23 in the axial direction 3 to the outer peripheral surface 17 extends and there a non-positive connection 24 with the outer bearing ring 15 formed.

4 shows the assembly 28 according to 3 in a perspective view. Here you can see that the bearing plate 19 a plurality of clamping areas 23 which is along a circumferential direction 25 are evenly distributed and each a positive connection 24 with the outer bearing ring 15 form.

Next, the bearing plate 19 a plurality of connecting sections 22 on that along a circumferential direction 25 are evenly distributed, with the bearing plate 19 over each connection section 22 with the gearbox 5 for the determination of the fixed camp 2 is connectable. Here, each connection section 22 at least one hole 32 (possibly with a thread), over which the respective connecting portion 22 with a screw on the gearbox 5 is fastened.

The clamping area 23 and the connecting sections 22 are in the circumferential direction 25 spaced apart. Here are the clamping areas 23 and connecting sections 22 in the circumferential direction 25 arranged alternately and evenly spaced from each other.

Each clamping area 23 is at one, at least in the radial direction 21 elastically deformable holding arm 26 arranged, extending from a main body 27 the bearing plate 19 starting at least in a circumferential direction 25 up to the clamping area 23 extends. The holding arm 26 is when mounting the bearing plate 19 on the outer bearing ring 15 in the radial direction 21 outwardly elastically deformed, so that the holding arm 26 over the clamping area 23 a clamping force on the outer bearing ring 15 exercises. The holding arm 26 has a much better elastic deformability than the main body 27 the bearing plate 19 on.

About the clamping areas 23 is the outer bearing ring 15 on the bearing plate 19 can also be arranged as part of a pre-assembly, wherein by the clamping action positioning of the bearing plate 19 at the camp 2 is guaranteed. Thus, the bearing plate 19 together with the camp 2 (and possibly together with the first wave 6 ) in the transmission housing 5 arranged and from outside the gearbox 5 over the connecting sections 22 with the gearbox 5 get connected. Due to the clamping effect between clamping area 23 and outer bearing ring 15 can the bearing plate 19 opposite the outer bearing ring 15 z. B. in the circumferential direction 25 be moved so that a connecting means (eg a screw) at the connecting portion 22 is correctly positioned. Next allows z. B. an elastically deformable support arm 26 also a shift of the bearing plate 19 in the radial direction 21 , so that connecting means as simple as possible with the connecting sections 22 are connectable.

Visible extends the support arm 26 additionally (to the circumferential direction 25 ), starting from the main body 27 , along the axial direction 3 up to the clamping area 23 , The clamping area 23 is on the outer peripheral surface 17 of the outer bearing ring 15 arranged. The holding arm 26 So it extends from a body 27 who also has the contact surface 20 the bearing plate 19 at the first end 16 of the outer bearing ring 15 includes, in the axial direction 3 over the outer peripheral surface 17 of the outer bearing ring 15 up to the clamping area 23 ,

5 shows the bearing plate 19 according to 3 and 4 in a plan view along the axis of rotation 29 , 6 shows the bearing plate 19 according to 5 in a perspective view. The 5 and 6 are described together below, referring to the comments on 3 and 4 Reference is made. The non-deformed clamping areas 23 the bearing plate 19 are on a first diameter 30 arranged, the first diameter 30 smaller than a second diameter 31 (please refer 2 ) an outer peripheral surface 17 an outer bearing ring 15 of the rolling bearing 13 , at the disc-shaped bearing plate 19 is to be arranged. Before assembling bearing plate 19 and roller bearing 13 are the clamping areas 23 the bearing plate 19 so not elastically deformed. Only through the assembly of bearing plate 19 and rolling bearings 13 (please refer 2 to 4 ) become the elastically deformable clamping areas 23 in the radial direction 21 bent up so that they are on the second diameter 31 the outer peripheral surface 17 are arranged.

LIST OF REFERENCE NUMBERS

1

 arrangement

2

 fixed bearing

3

 axial direction

4

 cone pulley

5

 gearbox

6

 First wave

7

 first conical disk pair

8th

 second wave

9

 second cone pulley pair

10

 first cone pulley

11

 second cone pulley

12

 endless

13

 roller bearing

14

 inner bearing ring

15

 outer bearing ring

16

 first end face

17

 Outer circumferential surface

18

 second end face

19

 bearing plate

20

 contact surface

21

 radial direction

22

 connecting portion

23

 clamping range

24

 connection

25

 circumferentially

26

 holding arm

27

 body

28

 module

29

 axis of rotation

30

 first diameter

31

 second diameter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• WO 2011/148474 A1 [0003]

Claims (10)

Arrangement ( 1 ) establishing a permanent camp ( 2 ) in an axial direction ( 3 ), at least comprising a transmission ( 4 ) with a transmission housing ( 5 ), in which at least a first wave ( 6 ) is rotatably disposed, wherein the first shaft ( 6 ) via rolling bearings ( 13 ) is rotatably mounted; wherein at least one rolling bearing ( 13 ) of the first wave ( 6 ) a fixed warehouse ( 2 ) and an inner bearing ring ( 14 ) standing on a wave ( 6 ), and an outer bearing ring ( 15 ), which has a first face ( 16 ), an outer peripheral surface ( 17 ) and a second end face ( 18 ) comprises; wherein a disc-shaped bearing plate ( 19 ) with a first contact surface ( 20 ) at the first end face ( 16 ) is arranged and starting from the contact surface ( 20 ) in a radial direction ( 21 ) extends to the outside, wherein the bearing plate ( 19 ) in the radial direction ( 21 ) outside the outer bearing ring ( 15 ) at least one connecting section ( 22 ), over which the bearing plate ( 19 ) with the transmission housing ( 5 ) determining the fixed camp ( 2 ) is connectable; the bearing plate ( 19 ) at least one clamping area ( 23 ) which extends in the axial direction ( 3 ) to the outer peripheral surface ( 17 ) and there a non-positive connection ( 24 ) with the outer bearing ring ( 15 ) trains. Arrangement ( 1 ) according to claim 1, wherein the transmission ( 4 ) is a conical pulley, wherein in the transmission housing ( 5 ) at least the first wave ( 6 ) with a first cone pulley pair ( 7 ) and a second wave ( 8th ) with a second cone pulley pair ( 9 ) each with one in the axial direction ( 3 ) displaceable first cone pulley ( 10 ) and one in the axial direction ( 3 ) fixed second cone pulley ( 11 ) and one for torque transmission between the conical disk pairs ( 7 . 9 ) arranged around ( 12 ) are arranged; where the waves ( 6 . 8th ) each via rolling bearings ( 13 ) are rotatably mounted. Arrangement ( 1 ) according to one of the preceding claims, wherein the bearing plate ( 19 ) a plurality of clamping areas ( 23 ), which along a circumferential direction ( 25 ) are evenly distributed and in each case a non-positive connection ( 24 ) with the outer bearing ring ( 15 ) train. Arrangement ( 1 ) according to one of the preceding claims, wherein the bearing plate ( 19 ) a plurality of connection sections ( 22 ), which along a circumferential direction ( 25 ) are evenly distributed, wherein the bearing plate ( 19 ) over each connecting section ( 22 ) with the transmission housing ( 5 ) determining the fixed camp ( 2 ) is connectable. Arrangement ( 1 ) according to one of the preceding claims, wherein the at least one clamping region ( 23 ) and the at least one connecting section ( 22 ) in a circumferential direction ( 25 ) are spaced from each other. Arrangement ( 1 ) according to one of the preceding claims, wherein the bearing plate ( 19 ) a plurality of clamping areas ( 23 ) and a plurality of connection sections ( 22 ) having; the clamping areas ( 23 ) and connecting sections ( 22 ) in a circumferential direction ( 25 ) are arranged alternately and evenly spaced from each other. Arrangement ( 1 ) according to one of the preceding claims, wherein the at least one clamping region ( 23 ) at one, at least in the radial direction ( 21 ) elastically deformable holding arm ( 26 ) is arranged, which differs from a basic body ( 27 ) of the bearing plate ( 19 ) starting at least in a circumferential direction ( 25 ) to the clamping area ( 23 ). Arrangement ( 1 ) according to claim 7, wherein the holding arm ( 26 ) additionally, starting from the main body ( 27 ), along the axial direction ( 3 ) to the clamping area ( 23 ). Arrangement ( 1 ) according to claim 8, wherein the bearing plate ( 19 ) is a sheet metal part, wherein the at least one clamping region ( 23 ) in the axial direction ( 3 ) from the contact surface ( 20 ) is arranged at a distance, wherein the clamping region ( 23 ) is made by bending. Assembly ( 28 ) for an arrangement ( 1 ) according to one of the preceding claims, comprising as a fixed bearing ( 2 ) executed rolling bearing ( 13 ) and one on the rolling bearing ( 13 ) can be arranged disc-shaped bearing plate ( 19 ); the bearing plate ( 19 ) a plurality of, at least in the radial direction ( 21 ) elastically deformable clamping areas ( 23 ), wherein the non-deformed clamping areas ( 23 ) on a first diameter ( 29 ), wherein the first diameter ( 29 ) is smaller than a second diameter ( 30 ) an outer peripheral surface ( 17 ) of an outer bearing ring ( 15 ) of the rolling bearing ( 13 ), at which the disc-shaped bearing plate ( 19 ) is to be arranged.

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