DE102011017198A1 - Connection assembly has shaft part with driving collar part, which are connected to each other through pair of elastic force transmission elements, where relative rotation is enabled between shaft part and driving collar part - Google Patents

Abstract

The connection assembly (10) has a shaft part (12) with a driving collar part (14), which are connected to each other through a pair of elastic force transmission elements (22). A relative rotation is enabled between the shaft part and the driving collar part by the elastic deformation of the force transmission elements, where the force transmission element is provided with a receiving part. The shaft part and the driving collar part are connected in a circumferential direction (28) through an outer peripheral portion of shaft part and an inner peripheral portion of the driving collar part.

Description

The invention relates to a connection arrangement of a shaft part with a hub part specified in the preamble of claim 1. Art.

The DE 10 2006 048 653 A1 discloses a coupling device for transmitting a torque between a drive element and a clutch having a first shaft and a second shaft surrounding it, wherein the two shafts are coupled together by means of a form-fitting connection in the circumferential direction. In this case, an elastic element for generating a bias in the positive connection is provided. It has been shown that problems can occur with this type of connection of the two shafts.

It is therefore an object of the present invention to provide a connection arrangement of a shaft part with a hub part, in which the shaft part and the hub part are coupled together in an improved manner.

This object is achieved by a connection arrangement of a shaft part with a hub part with the features of patent claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the remaining claims.

In such a connection arrangement of a shaft part with a hub part, the shaft part and the hub part are connected to one another in the circumferential direction via an outer peripheral region of the shaft part and an inner peripheral region of the hub part at least in a form-fitting manner.

According to the invention, it is provided that the shaft part and the hub part are connected to one another by transmitting at least one pair at least in the circumferential direction of elastic force transmission elements for transmitting torques. By means of the force transmission elements, a relative rotation between the shaft part and the hub part is made possible with elastic deformation of the force transmission elements. Due to the connection arrangement according to the invention, in which the shaft part and the hub part are connected to each other in particular exclusively via the at least one pair of elastic force transmission elements, a shaft-hub connection is created, which is torsionally elastic as a result of the elastic design of the force transmission elements. In addition, it allows compensation of radial misalignment and angular errors between shaft and hub.

Thus, in the connection arrangement according to the invention, torques can be transmitted between the hub part and the shaft part, however, the shaft part and the hub part are rotatable relative to each other within the framework of the elastic deformability of the force transmission elements and are therefore at least substantially motionless and, in particular, vibration-decoupled from one another. In other words, in particular a vibration decoupling between the shaft part and the hub part is created by the elastic design of the power transmission part, so that swelling and / or changing torques are at least substantially attenuated during transmission of this between the shaft part and the hub part. As a result, the load on the connection of the shaft part to the hub part can be kept low. The connection arrangement according to the invention thus enables an improved connection of the shaft part and the secondary part, in which a connection for transmitting high torques between the shaft part and the hub part is ensured over a long service life.

Characterized in that the shaft part and the hub part in the outer peripheral region and in the inner peripheral region are not connected at least substantially directly, but in particular exclusively via the force transmission elements, that is mediated by, and under mutual radial spacing, for transmitting torques in the circumferential direction, allows the connection arrangement according to the invention also a compensation of a radial offset and / or an axial offset of the shaft part and the secondary part.

In addition to the elastic deformability of the decoupling element torsionally elastic connection of the shaft part and the secondary part, it is possible in the connection arrangement according to the invention, if necessary, a backlash between the shaft part and the hub part or on the one hand between the shaft part and the power transmission elements and on the other hand between the power transmission elements and the Hub part represent. For example, the emergence of unwanted noise, for example due to a tooth flank change can be avoided.

Another advantage is that the described advantages of the connection arrangement are realized in a simple and therefore cost-effective manner. The connection arrangement according to the invention makes it possible with relatively simple and thus cost-effective means the representation of a torsionally elastic, play compensating and, if necessary, backlash-free connection of the hub part with the shaft part. It can be provided that the hub part and / or the Shaft part and / or in particular the force transmission elements are made of plastic. This keeps the weight of the connection arrangement according to the invention low. Likewise it can be provided that the hub part and / or the shaft part and / or in particular the force transmission elements are made of steel. As a result, the connection arrangement according to the invention has a particularly high degree of robustness and ensures a secure connection of the shaft part to the hub part even under harsh environmental conditions.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

The drawing shows in:

1 a schematic perspective view of a shaft-hub connection in which a shaft portion and a gear as a hub part over an outer peripheral portion of the shaft portion and an inner peripheral portion of the gear for transmitting torque in the circumferential direction are positively and torsionally connected to each other;

2 a schematic perspective view of the shaft-hub connection according to 1 with a clamping washer and a clamping screw for mutual clamping of the shaft part and the gear;

3 a schematic front view of a spring washer of the shaft-hub connection according to the 1 and 2 ;

4 a schematic sectional view along the section line AA of the spring washer according to 3 ;

5 a schematic perspective view of the shaft portion of the shaft-hub connection according to the 1 and 2 ;

6 a schematic perspective view of the shaft part according to 5 on which a plurality of spring washers according to 3 and 4 is arranged;

7 a schematic perspective view of the clamping disk of the shaft-hub connection according to the 1 and 2 ;

8th a detail of a schematic perspective view of the shaft part with the spring washers according to 6 ;

9 a fragmentary schematic longitudinal sectional view of the shaft-hub connection according to 2 ; and

10 a schematic side view of the shaft part according to 6 with the clamping disc according to 7 and the clamping screw according to 2 ,

The 1 shows a shaft-hub connection 10 in which a shaft part 12 as well as a gear 14 are provided as a hub part. The shaft part 12 and the gear 14 are over an outer peripheral area 16 of the shaft part 12 and over an inner peripheral area 18 of the gear 14 in the circumferential direction for transmitting torque indirectly positively connected to each other.

As in synopsis, especially with the 3 . 4 and 6 is recognizable, is the indirect positive connection of the shaft part 12 with the gear 14 a spring washer package 20 with a plurality of spring washers 22 intended. The spring washers 22 are at least substantially annular and have teeth on the inside 24 on which in the radial direction of the shaft-hub connection 10 according to a directional arrow 26 protrude inward. The teeth 24 are in the circumferential direction of the shaft-hub connection 10 according to a directional arrow 28 arranged at least substantially evenly distributed.

On the outside, the spring washers 22 at least substantially finger-shaped, resilient, that is elastically deformable, spring fingers 30 on, which in the circumferential direction over the circumference of the respective spring washer 22 at least substantially evenly distributed. The teeth are connected 24 and the spring fingers 30 with a respective ring body 32 the spring washers 22 , This allows the spring washers 22 particularly easy to be mounted.

How the particular 3 can be seen, have the spring fingers 30 in each case one, at least substantially in the radial direction extending length range 34 and an obliquely, in particular at least substantially perpendicular, extending to the longitudinal region 36 which adjoins the length range 34 followed. A transition area between the length ranges 34 and 36 is at least substantially arcuate educated. Again 3 it can be seen, are the spring fingers 30 thereby curved in the circumferential direction.

For connecting the shaft part 12 and the gear 14 has the shaft part 12 Outer peripheral side a plurality of grooves 38 on, which in the circumferential direction over the circumference of the shaft part 12 at least substantially evenly distributed. How the particular 6 it can be seen, serve the grooves 38 in addition, the corresponding teeth 24 take.

Analogously, the gearwheel 14 inside peripheral grooves 40 on, which are arranged in the circumferential direction on the inner circumference side at least substantially uniformly distributed. As in particular the 1 and 2 it can be seen, serve the grooves 40 to that, the spring fingers 30 at least in some areas.

Because the spring washers 22 and in particular the spring fingers 30 resilient (elastically deformable) are formed, thereby the shaft part 12 and the gear 14 in the circumferential direction indirectly via the spring disk package 20 positively connected with each other, so that between them torques can be transmitted. At the same time it is between the shaft part 12 and the gear 14 one within the elastic deformability of the spring washers 22 torsionally elastic connection between the shaft part and the hub part 14 created. Thus, vibrations, in particular torsional vibrations, between the shaft part 12 and the gear 14 be steamed. Such torsional vibrations result, for example, in particular from swelling and / or changing torques, which between the shaft part 12 and the gear 14 to be transferred.

In this torsionally flexible (torsionally elastic) connection of the shaft part 12 and the gear 14 be in the radial direction at least partially between the shaft part 12 and the gear 14 between these arranged spring washers 22 braced by mutual twisting, so that the shaft part 12 and the gear 14 are mutually strained. As a result, a backlash between the shaft part 12 and the gear 14 given. In particular, due to the curved shape of the spring fingers 30 This is also a radial misalignment between the gear 14 and the shaft part 12 compensate.

Again 6 and in particular the 8th it can be seen, are the spring washers 22 of the spring disk package 20 in the axial direction of the shaft-hub connection 10 according to a directional arrow 42 arranged alternately reversed to pairs. In other words, the spring washers 22 of the spring disk package 20 are all at least substantially the same education (apart from production-related tolerances and the resulting production-related deviations). The at least substantially the same spring washers 22 are now arranged so alternately and reversed to pairs, that the spring fingers 30 a first of the spring washers 22 opposite to the spring fingers 30 a second, immediately following the first spring washer second of the spring washers 22 run. Relative to the picture plane of the 3 in conjunction with the 6 This means that the spring fingers 30 the first of the spring washers 22 curved left, while the spring fingers 30 the second of the spring washers 22 curved to the right. The spring fingers 30 a third, immediately on the second of the spring washers 22 following the spring washers 22 are again left curved and so on.

Due to this structure of the spring disk package 20 can the spring fingers 30 deformed differently from each other both radially and axially, so that thereby offset an angular offset. For this purpose, the spring fingers 30 , again 4 it can be seen, an extension in the axial direction according to the directional arrow 42 which is smaller than the axial extent of the annular body 32 , In other words, the spring fingers 30 in the axial direction by the amount s + s narrower than the ring body 32 ,

The described bracing is done by a in the 7 illustrated clamping disk 44 containing a plurality of sharpened pins 46 includes. The pencils 46 are arranged distributed in the circumferential direction at least substantially uniformly and with an at least substantially annular ring body 48 connected. For clamping the spring washers 22 and thus the shaft part 12 and the gear 14 be the pins 46 by means of a clamping screw 50 in respective free cross sections 52 between the teeth 24 and the grooves 38 driven.

In other words, the grooves 38 have in the circumferential direction a greater extent than the corresponding teeth 24 , Are the teeth 24 in the grooves 38 arranged, so are first between the teeth 24 and the grooves 38 delimiting walls of the shaft part 12 given respective distances or free spaces. In these distances or clearances are the pins 46 driven. In order to realize this driving and the associated bracing in a simple manner and at the same time be able to apply a certain amount of force for clamping, the clamping screw is used 50 ,

The clamping screw 50 has a screw shaft 54 on, which at least partially with an external thread 55 is provided. The clamping screw 50 further comprises a screw head 56 , which rotatably with the screw shaft 54 connected is. For clamping the spring washers 22 becomes the clamping screw 50 about her external thread 55 in a corresponding internal thread 58 screwed in while the clamping screw 50 over her screw head 56 on the ring body 48 the clamping disc 44 supported. By further screwing in the clamping screw 50 in the internal thread 58 the clamping screw moves 50 in the axial direction according to the directional arrow 42 further into the internal thread 58 into it. This is the clamping disc 44 in the direction of the shaft part 12 and the gear 14 emotional. Furthermore, thereby the spring washers 22 a first orientation, that is, for example, the spring washers with the left-curved or with the right-curved spring fingers twisted so that they in support system with respective, the grooves 40 of the gear 14 in the circumferential direction on the one hand limiting first walls (flanks) of the gear 14 reach. This is accompanied by a rotation of the gear 14 , causing the spring washers 22 a second, opposite to the first orientation orientation, that is, the spring washers 22 with the appropriately differently curved spring fingers 30 , in support system with respective, the first walls opposite and the grooves 40 of the gear 14 in the circumferential direction on the other hand limiting second walls of the gear 14 come.

The pencils 46 twist the spring washers 22 but even further, causing it to strain the spring washers 22 and thus the shaft part 12 and the gear 14 comes. As a result, a circumferentially play-free and positive connection between the shaft part 12 and the gear 14 realized so that torques between the shaft part 12 and the gear 14 can be transmitted and at the same time in the circumferential direction a torsionally soft, that is torsionally elastic, connection between the shaft part 12 and the gear 14 is created. The shaft part 12 and the gear 14 can thus within the elastic deformability of the spring fingers 30 rotate in the circumferential direction relative to each other and between the shaft part 12 and the gear 14 Torques can be transmitted.

As in the tension and a torque change and the at least substantially annular ring body 32 the spring washers 22 deformed, in the area in which the spring washers 22 by means of the clamping disc 44 pressed against each other, there is a damping of movements and thus any vibrations by friction instead.

Again 9 can be seen, includes the shaft part 12 a start-up bond 60 , which for supporting the spring washer package 20 in the axial direction. In the axial direction between the spring disk package 20 and the startup association 60 is a filling disc 62 provided on the one hand on the last of the spring washers 22 of the spring disk package 20 and on the other hand at the start-up collar 60 is applied.

The shaft-hub connection 10 thus enables the torsionally elastic and if necessary backlash-free connection for transmitting torques and / or rotational speeds between the shaft part 12 and the gear 14 and in a particularly cost-effective way. In particular, the requirements for the manufacturing accuracy of the grooves 38 and 40 be kept low, resulting in very low production costs for the shaft-hub connection 10 goes hand in hand.

The spring fingers are preferred 30 , the teeth 24 and the ring body 32 formed integrally with each other. Likewise, the pins are preferred 46 and the ring body 48 formed integrally with each other. It can be provided that the spring washers 22 and / or the clamping disk 44 and / or the shaft part 12 and / or the gear 14 and / or the filling disc 62 at least substantially formed of a plastic. Equally possible is the corresponding training of a steel, which with a particularly high robustness of the shaft-hub connection 10 goes hand in hand. The spring washers 22 can be designed both in one piece and in several parts as spring packs.

Like that 1 to 10 it can be seen, are the shaft part 12 and the gear 14 at least in the outer peripheral area 16 or in the inner peripheral area 18 spaced apart in the radial direction and exclusively via the spring disk package 20 with the spring washers 22 in the circumferential direction positively connected or coupled to each other, so that between them torques can be transmitted. Through this exclusive connection via the spring washer package 20 are the wave part 12 and the gear 14 in particular in the circumferential direction and in the context of the elastic deformability of the spring fingers 30 connected together vibration-decoupled. As a result, in particular torsional vibrations due to swelling and / or changing torques can be damped, wherein the spring washers 22 as power transmission elements for transmitting torques between the shaft part 12 and the gear 14 act.

LIST OF REFERENCE NUMBERS

10

The shaft-hub-connection

12

shaft part

14

gear

16

Outer peripheral region

18

Inner perimeter

20

Spring washer package

22

spring washer

24

tooth

26

arrow

28

arrow

30

spring fingers

32

ring body

34

length range

36

length range

38

groove

40

groove

42

arrow

44

tensioning pulley

46

pen

48

ring body

50

clamping screw

52

cross-section

54

screw shaft

55

external thread

56

screw head

58

inner thread

60

stop collar

62

filling disk

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 102006048653 A1 [0002]

Claims (10)

Connection arrangement ( 10 ) of a shaft part ( 12 ) with a secondary part ( 14 ), in which the shaft part ( 12 ) and the secondary part ( 14 ) in the circumferential direction ( 28 ) over an outer peripheral area ( 16 ) of the shaft part ( 12 ) and an inner peripheral area ( 18 ) of the secondary part ( 14 ) are at least positively connected to each other, characterized in that the shaft part ( 12 ) and the hub part ( 14 ) mediating at least one pair of elastic force transmission elements ( 22 ) are interconnected, by means of which under elastic deformation of the force transmission elements ( 22 ) a relative rotation between the shaft part ( 12 ) and the hub part ( 14 ) is possible. Connection arrangement ( 10 ) according to claim 1, characterized in that the force transmission element ( 22 ) at least a first receiving part ( 24 ), which at least partially in a corresponding groove ( 38 ) of the shaft part ( 12 ) is recorded. Connection arrangement ( 10 ) according to one of claims 1 or 2, characterized in that the force transmission element ( 22 ) at least one second receiving part ( 30 ), which at least partially in a corresponding groove ( 40 ) of the secondary part ( 14 ) is recorded. Connection arrangement ( 10 ) according to one of claims 2 or 3, characterized in that the force transmission element ( 22 ) a carrier part ( 32 ), on which the first and / or the second receiving part ( 24 . 30 ) are held. Connection arrangement ( 10 ) according to claim 4, characterized in that the first and / or the second receiving part ( 24 . 30 ) have a smaller, in the axial (42) direction extending thickness than the carrier part. Connection arrangement ( 10 ) according to one of claims 2 to 5, characterized in that the first and / or the second receiving part ( 24 . 30 ) at least one, at least substantially in the circumferential direction ( 28 ) obliquely to the radial direction ( 26 ) extending length range ( 36 ) having. Connection arrangement ( 10 ) according to one of the preceding claims, characterized in that the shaft part ( 12 ) and the hub part ( 14 ) in the radial direction ( 26 ) with mutual spacing in the circumferential direction ( 28 ) are interconnected. Connection arrangement ( 10 ) according to one of the preceding claims, characterized in that the shaft part ( 12 ) at least one stop ( 60 ), on which the force transmission element ( 22 ) in the axial direction ( 42 ) at least indirectly on the shaft part ( 12 ) is supported. Connection arrangement ( 10 ) according to one of the preceding claims, characterized in that at least one spacer element ( 62 ) is provided, by means of which the power transmission element ( 22 ) on the shaft part ( 12 ) is supported. Connection arrangement ( 10 ) according to one of the preceding claims, characterized in that at least one tensioning element ( 44 ) is provided, by means of which the shaft part ( 12 ) and the hub part ( 14 ) in the circumferential direction ( 28 ) via the force transmission element ( 22 ) are braced against each other.

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