DE102016219404A1 - Tripod roller, constant velocity joint with the tripod roller and method for mounting the tripod roller - Google Patents

Abstract

One type of constant velocity joints are tripod joints, which often have a tripod star with pins as a joint partner, wherein the pins are aligned in the radial direction to the joint partner and each carry a Tripodenrolle. The tripod star with the tripod rollers engages in a joint bell, which has three elongated recesses extending in the axial direction to the second joint partner, in which the three tripod rollers can move axially to the second joint partner. There is a tripod roller 9 for a constant velocity joint 1 with an inner ring 11 and with an outer ring 12 as rings, wherein the rings are arranged coaxially to a tripod roller axis T, with a plurality of rollers 13, wherein the rollers 13 are arranged rolling between the rings, wherein the one ring is formed as a mounting ring and the other ring is formed as a shoulder ring with a shoulder 22, wherein the end shoulder 22 forms a run-up for the rollers 13 proposed, wherein the mounting ring is formed with a shoulder side 17, wherein the shoulder side 17 forms another start for the rollers 13 on the end shoulder 22.

Description

The invention relates to a tripod roller for a constant velocity joint having the features of the preamble of claim 1. The invention also relates to a constant velocity joint with at least one of these tripod rollers and a method for mounting the tripod roller.

Constant velocity joints are joints for uniform angular velocity and torque transmission from a shaft to an angularly mounted shaft. For example, constant velocity joints are used to transmit drive torque from an engine to the wheels of a steered axle of a vehicle.

One type of constant velocity joints are tripod joints, which often have a tripod star with bolts as a joint partner, wherein the bolts are aligned in the radial direction to the joint partner and each carry a Tripodenrolle. The tripod star with the tripod rollers engages in a joint bell, which has three elongated recesses extending in the axial direction to the second joint partner, in which the three tripod rollers can move axially to the second joint partner.

An example of such a constant velocity joint is in the published patent application DE 44 39 965 A1 shown, which is probably the closest prior art. The document discloses a tripod unit in which a positive coupling directly between an outer ring of a tripod roller and an inner ring of the tripod roller and the inner ring has an annular shoulder which rests on the front side of the outer ring of the tripod roller.

It is an object of the invention to provide an easy to manufacture Tripodenrolle and a constant velocity joint with the Tripodenrolle and a method for mounting the Tripodenrolle. This object is achieved by a tripod roller with the features of claim 1, a constant velocity joint having the features of claim 9 and by a method having the features of claim 10. Preferred or advantageous embodiment of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

The invention thus provides a tripod roller for a constant velocity joint. The constant velocity joint is designed in particular as a synchronized Verschegelegelenk. In particular, the constant velocity joint is formed as a homokinetic joint for uniform angular velocity and torque transmission from a shaft to an angularly attached second shaft. Particularly preferably, the constant velocity joint is formed as a transmission joint for transmitting a driving torque from a motor to steered wheels of a vehicle. In particular, the constant velocity joint between an axle and a drive shaft is arranged. The constant velocity joint has, as a first joint partner, a tripod star with three pins extending in the radial direction to an axis of the tripod star. On the pin a tripod roller is placed in each case. The tripod star engages in a joint bell as a second joint partner, wherein the joint bell has three in the axial direction to the second joint partner extending, elongated recesses into which the three tripod rollers can move axially to the second joint partner.

The tripod roller has an inner ring for placement on the tripod star, in particular on one of the pins of the tripod star. Further, the tripod roller has an outer ring, wherein the outer ring is arranged coaxially with the inner ring. Hereinafter, inner ring and outer ring are collectively referred to as rings. The rings are also arranged coaxially to a tripod roller axle. Preferably, the outer ring has a spherical and / or spherical segment-like outer side in a longitudinal section along the tripod roller axis.

The tripod roller has a plurality of rollers, in particular cylindrical rollers, in particular needles, with the rollers being arranged in a rolling manner between the rings. In particular, the rollers are rectified and / or oriented parallel to the tripod roller axle. Particularly preferably, the rollers are arranged in a single row.

The one ring is designed as a mounting ring. The other ring, in contrast, is designed as a shoulder ring with a closing shoulder side. The end shoulder side is a start for the roles. In particular, the end shoulder side has a shelf and / or a contact surface for the rollers. The contact surface is preferably in a radial plane to the tripod roller axis.

In the context of the invention it is proposed that the mounting ring is formed with a shoulder side, wherein the shoulder side forms a start-up for the rollers. In particular, the shoulder side has a shelf and / or a contact surface for the rollers. The contact surface is preferably in a radial plane to the tripod roller axis.

It is a consideration of the invention that the rollers on the axial side of the end shoulder not start exclusively against the end shoulder side, but also against the shoulder side of the mounting ring. hereby It is achieved that the relative position in the axial direction between the rings can be adjusted automatically.

In a preferred embodiment of the invention it is provided that the end shoulder side engages over the shoulder side of the mounting ring in the axial direction at least in sections and secures positively. Thus, the mounting ring is secured relative to the shoulder ring in an axial direction by the shoulder side and in the other axial direction by the positive locking. In particular, the end shoulder side encompasses the shoulder side, in particular the board on the shoulder side on one side with its own start-up and on the other side with the positive-locking. Thus, the shoulder side takes a double function for axial securing, being secured on one side against the rollers and on the other side against the positive locking.

In a preferred embodiment of the invention, the mounting ring viewed in the axial direction on a raceway side. The raceway side is designed to run free in the axial direction for the rollers. Thus, the roles are not positively held on the raceway side by the mounting ring. In particular, the raceway side of the mounting ring against a raceway of the mounting ring is either flush or reset. Thus, this axial side of the mounting ring forms an assembly option for inserting the rollers.

In an advantageous embodiment of the invention, the shoulder ring has a further shoulder side, wherein the further shoulder side forms a start for the rollers. In particular, the shoulder side has a shelf and / or a contact surface for the rollers. The contact surface is preferably in a radial plane to the tripod roller axis.

Thus, the rollers are held on one axial side exclusively by the shoulder side of the shoulder ring and on the other side together by the shoulder side of the shoulder ring and by the end shoulder side of the mounting ring form-fitting in the axial direction. In addition, it is provided that the end shoulder side of the shoulder ring engages over the shoulder side of the race in the axial direction and secures positively. This design of the sides of the rings ensures that the tripod roller is designed to be self-holding and can therefore be manufactured and assembled in a particularly simple manner. In one axial direction, the tripod roller is secured against axial collapse by the two adjacent shoulder sides of the rings. In the other axial direction, however, the falling apart is achieved by the axial overlap and positive locking of the shoulder end shoulder on the shoulder side of the mounting ring. Thus, the tripod roller is implemented as a self-holding module with a very small number and consequently low production costs.

In a preferred embodiment of the invention, the form-fitting securing is performed by a caulking and / or embossment of the end shoulder side as a backup area. In particular, it is possible to dispense with a separating or exciting method for producing the securing region, with the result that the form-fitting securing is implemented in a particularly cost-effective manner.

In a preferred constructional realization of the invention, the securing area is produced by a forming tool which is pressed with a direction of action in the axial direction against the end shoulder area. Such a reshaping of the end shoulder region achieves that the material of the end shoulder region flows in the radial direction and thereby forms the securing region.

In a possible structural realization of the invention, the securing area is formed as a continuous and / or continuous area around the tripod roller axle. This embodiment has the advantage that a rotational symmetry is maintained in the shoulder ring.

In an alternative embodiment of the invention, the securing area is designed as a plurality of partial areas which surround the tripod roller axis but are interrupted. For example, it may be sufficient that such embossing or caulking is implemented only in a limited number of partial regions, such as less than five partial regions, in particular fewer than four partial regions and especially precisely three partial regions, in order to form the securing region. In this embodiment, the securing area can be made particularly cost-effective on the shoulder ring, since the force required for forming and the resulting load on the shoulder ring is comparatively small.

Looking more closely at the securing area, it can be seen that in preferred embodiments of the invention, the end shoulder side has a partial area with a coaxially arranged cylinder jacket surface, wherein this partial area adjoins directly to the start for the rollers. This subarea transitions into the security area, with the security area projecting beyond the subarea in the radial direction. In the event that the shoulder ring as an outer ring is formed, the securing area is in the radial direction inwardly over the portion over. In the event that the shoulder ring is formed as an inner ring, the securing area projects in the radial direction outwards over the partial area. In particular, the portion extends at least over the axial extent of the shoulder side of the mounting ring, so that in a relative rotation of the ring of the fuse area no interference contour is formed.

In a preferred embodiment of the invention, the shoulder region of the mounting ring has a circumferential throat area, the throat area facing the securing area. It is particularly preferred that the throat region is arranged overlapping with the securing region, in particular in the radial direction. The throat area is designed as a franking or omission. By the throat area is implemented that makes the mounting ring a diameter jump, so that the positive locking when moving the rings relative to each other also intermittently engages and does not lead to a jam. In particular, can be reduced by the throat area, the axial width of the shoulder ring.

In principle, it is possible that the mounting ring is designed as an outer ring and the shoulder ring as an inner ring. In a preferred embodiment of the invention, however, the shoulder ring is designed as an outer ring and / or the mounting ring as an inner ring.

Another object of the invention relates to a constant velocity joint, which has at least one tripod roller, as described above or according to one of the preceding claims. The constant velocity joint has as a joint partner on a tripod star, which has three aligned in the radial direction to the joint partner pin, on each of which a tripod roller is arranged, as described above or according to one of the preceding claims. The other joint partner, however, is formed as a bell, which has three elongated recesses into which the tripod rollers are retracted. In particular, the constant velocity joint is formed as previously described.

Another object of the invention relates to a method for mounting the Tripodenrolle, as described above or according to one of the preceding claims. In the process, it is proposed that, in a first step, the rollers are arranged between the rings and in a later step the shoulder ring is caulked and / or embossed in order to create the securing region. Thus, a simple mounting of the tripod roller is possible, wherein a captive and / or the transition to a self-holding assembly is implemented in the partially assembled or fully assembled state. This is achieved by embossing and / or caulking the end shoulder side only after assembly in order to create the securing area.

Further features, advantages and effects of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. Showing:

1 a highly schematic representation of a constant velocity joint with a tripod roller as an embodiment of the invention;

2 a schematic longitudinal sectional view of the tripod roller in the 1 ;

3 a detail from the Tripodenrolle in the 2 ,

The 1 shows a highly schematic representation of a constant velocity joint 1 for a vehicle 2 , which is shown as a block only, as an embodiment of the invention.

The constant velocity joint 1 is in the drive train between a transmission output 3 , in particular a differential gear, and an intermediate shaft 4 , in particular wheel drive shaft or propeller shaft arranged. The transmission output 3 defines an output axis 5 , the intermediate shaft 4 defines a shaft axis 6 , The constant velocity joint 1 is formed, a rotation and thus a driving torque from the output 3 on the intermediate shaft 4 to transmit and at the same time a tilt or angle change between the output axis 5 and the shaft axis 6 to allow, as for example at a compression of the intermediate shaft 4 connected, driven wheels can be done. The intermediate shaft 4 has a stub shaft portion 7 on which a plurality of cones 8th , in this embodiment, three pins 8th , which are arranged radially to the shaft axis 6 extend. The cones 8th are in the direction of rotation about the shaft axis 6 arranged regularly so that they form a tripod star. In the 1 is just one of the cones 8th shown graphically. On the cones 8th is in each case a Tripodenrolle 9 arranged, which has a tripod roller axis T as a rotation axis, which is radial to the shaft axis 6 is arranged.

The constant velocity joint 1 also has a bell section 10 on which rotates with the output 3 is coupled and which tracks for the tripod rollers 9 provides.

While in the 1 an embodiment is shown, wherein the bell section 10 non-rotatable with the exit 3 coupled and the stub shaft portion 7 rotatably with the intermediate shaft 4 coupled, it is also possible in other embodiments that the stub shaft portion 7 with the exit 3 rotatably coupled and the bell section 10 with the intermediate shaft 4 is coupled. Furthermore, it is possible that the bell section 10 formed circumferentially closed or has free areas.

The 2 shows a schematic representation of the tripod roller 9 of the 1 , The tripod roll 9 has an inner ring 11 as well as an outer ring 12 on, which are arranged coaxially to the tripod roller axis T. Between the inner ring 11 and the outer ring 12 are arranged a plurality of rolling elements, wherein the rolling elements as rollers 13 and in particular as needles, are formed. The roles 13 are aligned parallel to the tripod roller axis T. The inner ring 11 represents an inner career 14 , the outer ring 12 represents an outer career 15 for the roles 13 available, with the rollers 13 on the inner raceway 14 or outer career 15 roll off. At the radial outside is the outer ring 12 curved so that they to the bell section 10 is adjusted.

In particular, the outer ring 12 in the longitudinal section shown a circular contour.

The inner ring 11 has a recording 16 for the stub shaft section 7 on.

The inner ring 11 is as a mounting ring with the inner raceway 14 formed and has a shoulder side 17 on, with the shoulder side 17 how a board is formed and an axial start for the rollers 13 forms. In particular, the shoulder side 17 a running in a radial plane to the tripod roller axis T starting surface 18 on. The contact surface 18 however, does not extend over the full radial extent of the roll 13 but runs only to the middle of the roll 13 ,

On the opposite axial side is the inner ring 11 with a runway side 19 formed, with the raceway side 19 opposite the inner raceway 14 either set back slightly or at least maximally in the same radial diameter. In principle, therefore, the rolling elements 13 over the raceway side 19 in the inner ring 11 be inserted.

The outer ring 12 On the other hand, it is designed as a shoulder ring, which has two shoulders 20a , b. Each shoulder side 20a , b is designed as a board and forms a start for the rolling elements 13 , Each of the sides has a contact surface 21a , b on, which also lies in a radial plane to the tripod roller axis T.

Looking at the shoulder sides 17 . 20a , b is the tripod roll 9 against a relative displacement of the outer ring 12 opposite the inner ring 11 positively secured in one direction. It is possible, however, that the outer ring 12 in the 2 to the right, in the direction of the raceway side 19 of the inner ring 11 can be moved so that the tripod roll 9 can fall apart during assembly.

However, this is prevented by a positive locking, as related to the 3 is explained. The 3 shows a detail of the Tripodenrolle 9 in the area of the shoulders 17 . 20a , It can be seen that the shoulder side 20a of the outer ring 12 as a graduation shoulder 22 is formed, which can be decomposed in axial division into two areas.

A subarea 23 , which is located directly on the rolling element 13 connects has a cylinder jacket surface which is arranged coaxially to the tripod roller axis T. Furthermore, this subarea is 23 opposite to the shoulder side 17 the mounting ring and / or inner ring 11 positioned. At the subarea 23 closes a backup area 24 which is formed by a caulking and / or embossment area. The backup area 24 stands opposite the subarea 23 a supernatant 25 in the radial direction over, as indicated by the two straight lines in the 3 is visualized. The supernatant 25 is sized so that the inner ring 11 not in the direction of the final page 22 can be moved out and thus positively secured in this direction. The supernatant 25 can be continuously formed circumferentially. However, it is also possible - especially as it is in the 3 is shown - that the supernatant 25 is provided only a few, for example, regularly spaced in the circumferential direction positions. The supernatant 25 in particular by a forming tool 26 , which in the axial direction with its direction of action W against the outer ring 12 pressed or pressed, generated.

On the shoulder side 17 the mounting ring and / or inner ring 11 is a throat area 27 introduced as a franking. The throat area 27 can be introduced, for example, separating. The throat area 27 is open to the outside axially and / or the security area 24 facing. Without the throat area 27 would have the shoulder ring and / or outer ring 12 in the area of the graduation shoulder 22 Run wider to make sure the shoulder side 17 of Mounting rings and / or inner ring 11 in normal operation not in contact with the graduation shoulder 22 occurs. Through the throat area 27 will the stability of the shoulder side 17 not significantly affected, however, the hedging area 24 and the shoulder side 17 be placed close together in the axial direction.

For a possible production of the tripod roller 9 become inner ring in a first step 11 , Outer ring 12 as well as rolling elements 13 mounted and subsequently the fuse area 24 produced by forming.

LIST OF REFERENCE NUMBERS

1

 Constant velocity joint

2

 vehicle

3

 transmission output

4

 intermediate shaft

5

 output axis

6

 shaft axis

7

 Stub shaft section

8th

 spigot

9

 Tripodenrolle

10

 chime

11

 inner ring

12

 outer ring

13

 rolling elements

14

 Inner raceway

15

 Outer race

16

 admission

17

 shoulder side

18

 approach surface

19

 Career Page

20

 shoulder pages

21

 contact surfaces

22

 Statements shoulder side

23

 subregion

24

 security area

25

 Got over

26

 forming tool

27

 Kehlbereich

T

 Tripodenrollenachse

W

 effective axis

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

• DE 4439965 A1 [0004]

Claims (10)

Tripod roller ( 9 ) for a constant velocity joint ( 1 ) with an inner ring ( 11 ) and with an outer ring ( 12 ) as rings, wherein the rings are arranged coaxially to a tripod roller axle (T), with a plurality of rollers ( 13 ), where the roles ( 13 ) are arranged rollingly between the rings, wherein the one ring is formed as a mounting ring and the other ring as a shoulder ring with a closing shoulder side ( 22 ), the end shoulder side ( 22 ) a start for the roles ( 13 ), characterized in that the mounting ring with a shoulder side ( 17 ), wherein the shoulder side ( 17 ) another start for the roles ( 13 ) on the graduation shoulder ( 22 ). Tripod roller ( 9 ) according to claim 1, characterized in that the end shoulder side ( 22 ) the shoulder side ( 17 ) overlaps in the axial direction and secures with a positive locking. Tripod roller ( 9 ) according to claim 1 or 2, characterized in that the mounting ring is a raceway side ( 19 ), wherein the raceway side ( 19 ) in the axial direction for the rollers ( 13 ) is designed without run-up. Tripod roller ( 9 ) according to one of the preceding claims, characterized in that the shoulder ring has a further shoulder side ( 20b ), wherein the further shoulder side ( 20b ) another start for the roles ( 13 ). Tripod roller ( 9 ) according to one of the preceding claims 2 to 4, characterized in that the positive locking by a caulking and / or embossment area of the end shoulder side ( 22 ) as a backup area ( 24 ) is executed. Tripod roller ( 9 ) according to claim 5, characterized in that the security area ( 24 ) by a forming tool ( 26 ) with a direction of action (W) in the axial direction against the end shoulder side ( 22 ) is generated. Tripod roller ( 9 ) according to one of the preceding claims, characterized in that the end shoulder ( 22 ) a subarea ( 23 ) with a coaxially arranged cylinder jacket surface, which in the security area ( 24 ), whereby the security area ( 24 ) in the radial direction over the subregion ( 23 ) survives. Tripod roller ( 9 ) according to one of the preceding claims, characterized in that the shoulder ring as an outer ring ( 12 ) and / or the mounting ring as an inner ring ( 11 ) is trained. Constant velocity joint ( 1 ), characterized by at least one tripod roller ( 9 ) according to any one of the preceding claims. Method for mounting the tripod roller ( 9 ) according to one of the preceding claims 3 to 9, characterized in that in a first step the rollers ( 13 ) are arranged between the rings and in a later step, the shoulder ring caulked and / or embossed to the security area ( 24 ) to accomplish.

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