WO2019110038A1

WO2019110038A1 - Clutch actuation device

Info

Publication number: WO2019110038A1
Application number: PCT/DE2018/100923
Authority: WO
Inventors: Marc Finkenzeller
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2017-12-04
Filing date: 2018-11-13
Publication date: 2019-06-13
Also published as: DE102017128653A1

Abstract

The invention relates to a clutch actuation device (8), in particular for a semi-automatic clutch of a motorbike, comprising at least one housing part (9), a swivel element (10), a torsion element (14) and a force transmission element (19), wherein the swivel element (10) can be rotationally fixed to a shifting shaft (6) of a transmission (4), the torsion element (14) is rotatably mounted on a housing part (9), the torsion element (14) is coupled to the swivel element (10) on one side and can be connected to the clutch (3) via the force transmission element (19) on the other side, and wherein a swivel movement of the swivel element (10) can be converted via the torsion element (14) into a translational movement of the force transmission element (19).

Description

Kupplunqsbetätiqunqsvorrichtunq

The invention relates to a clutch actuating device for a clutch of a motorcycle with at least one housing part, a pivoting element, a torsion element and a force transmission element.

From the general state of the art, various actuators for a clutch of a motorcycle are known. Usually, the operation of the clutch is independent of the gearshift. For this purpose, a clutch lever is provided, which can be arranged, for example, on the handlebar of a motorcycle. In addition to the interruption of the power flow during the switching process, the speed conversion during the start-up process is also controlled via the clutch lever.

Furthermore, semi-automatic clutches for motorcycles are known. In such clutches, the function of the clutch lever for interrupting the power flow during the gear selection is integrated in the shift lever. The starting process can here, as known for example from DE 10 2016 204 111 A1, be carried out by the use of a friction clutch with centrifugal force. This eliminates the clutch lever on the handlebar.

Semi-automatic couplings and their actuators are known, for example, from WO 2011/039767 A2 or described in the unpublished DE 10 2016 216 571.

Thus, WO 2011/039767 A2 discloses an actuating device for a semi-automatic clutch in which the rotation of the shift lever causes a translatory movement of an actuating rod for actuating the clutch out of the shifting plane.

A disadvantage of such an actuator, however, is the great need for space required for the Kupplungsaktuierung, the complex structure and the associated costs. It is therefore an object of the invention to further develop the known from the prior art clutch actuation devices, to remedy the disadvantages mentioned and in particular to provide a clutch actuator available, which should have a compact design possible.

The object is achieved by a clutch actuator of the type mentioned above, wherein the pivot member rotatably connected to a switching shaft of a transmission is connected, the torsion rotatably mounted on a housing part, the torsion coupled on the one hand with the pivot member and on the other hand via the power transmission element with the Clutch is connectable, and wherein a pivoting movement of the pivot member via the turning element in a translational movement of the power transmission element is umwan delbar.

Such a clutch actuating device makes it possible to use the movement of a shift lever, in particular the rotation of the shift shaft, in addition to the actual switching of the gears also for actuating the clutch.

Particularly advantageously, the switching axis of the switching shaft and the axis of rotation of the rotating element can be arranged parallel to each other. Thus, the swivel movement of the pivoting element initiated by the shift lever and the translation movement of the force transmission element can take place in mutually parallel planes, preferably in one plane, whereby a compact construction is made possible. Furthermore, as a result of this arrangement, ie as a preassembled assembly, the clutch actuating device can be connected directly to the selector shaft, so that assembly is also simplified. Also, it is thereby possible to test the clutch actuator as an assembly before final assembly and regardless of the operation of the shift lever.

Further advantageous embodiments are claimed in the subclaims and are explained in more detail below. The pivoting element and the torsion element can be positively or frictionally coupled with each other. The coupling can take place, for example, via toothed wheel or friction wheel connections.

Furthermore, the torsion element can have a first section for coupling to the

Have pivoting element and a second portion having a receptacle for receiving an end portion of the force transmission element. For this purpose, the first and the second section of the torsion element are arranged parallel to one another, preferably parallel to the plane of the pivoting movement.

Furthermore, it is desirable for the second section of the torsion element to have a first region and a second region, the first region being designed for the radial guidance of the force transmission element and the second region for laterally guiding the force transmission element. For this purpose, the second area is radially raised in relation to the first area. Also, the second area may be executed as an edge area facing the first section.

Preferably, the first region for radial guidance of the power transmission element is designed as an outer contour on the circumference of the torsion element.

In addition, it may be advantageous to rotatably support the torsion element about an axis of rotation and to arrange the receptacle for the force transmission element eccentrically to the axis of rotation on the rotating element. By the lying outside the axis of rotation of the United drehelements receiving the Flub of the power transmission element and thereby the operation of the clutch is realized.

Furthermore, the receptacle for the end portion of the power transmission element may be formed as a suspension lug. Thus, in a simple and secure manner, a positive and releasable connection of the power transmission element to the Twisting done. In case of wear, for example, the power transmission element can be easily replaced.

According to a preferred embodiment, the second portion of the Verdrehele- ment is designed as a cam. By using a cam can be created with minimal space a simple functional relationship between the pivotal movement of the pivot lever and the translational movement of the power transmission element.

Preferably, the force transmission element is designed in the form of a rope and the cam disc interacts with the force transmission element in such a way that when the cam disk rotates about the axis of rotation, the force transmission element conforms to the outer contour of the cam disk.

Furthermore, the cam disc may have a first cam portion and a second cam portion, wherein the first cam portion is configured such that the clutch is fully opened before shifting into a next gear and the second cam portion is configured such that the clutch during the gearshift held in its open position. Also, the second curve portion is selected so that the force to hold open the clutch is low and thereby the required shift lever force can be reduced to a minimum.

It is also possible to carry out the geometries of the cam sections of the cam for switching the gears up and down in the same way or differently. Due to the adapted contour of the geometry of the curve sections, the force or lifting conditions for upshifting and downshifting can be easily adjusted.

Advantageously, the force transmission element may be formed as a Bowden cable, rope or rod. Also, the clutch actuator can be used as a preassembled unit and be connected via additional connecting means with the frame of the motorcycle.

An embodiment of the invention, to which the invention is not limited and from which further features according to the invention may result, is explained in more detail below with reference to figures. Show it:

1 shows a block diagram of a drive train,

2 is a side view of a clutch actuator,

3 shows a longitudinal section of the clutch actuating device shown in FIG. 2,

4 shows the clutch actuating device shown in FIG. 2 and FIG. 3 without a housing connection in 3D, FIG.

5a and 5b: the clutch actuating device shown in FIGS. 2-4 in the actuated state.

FIG. 1 shows schematically a drive train 1 of a motorcycle on the basis of a block diagram. The drive train has a drive motor 2, which is shown here as an internal combustion engine, but can also be designed as an electric motor. About a clutch 3, a gear 4 and a drive shaft 5, the wheels of the motorcycle, not shown here are driven.

The transmission 4 is designed switchable and connected via a switching shaft 6 with a lever 7. In addition, the shift shaft 6 is provided with a clutch actuation device 8 is connected, which serves to actuate the here semi-automatically executed coupling 3.

Thus, if the shift lever 7 is actuated due to a shift request, both the transmission ratio in the transmission 4 is changed via the shift shaft 6 and the clutch 3 is actuated via the clutch actuating device 8. It is important to ensure that the power flow is interrupted by the operation of the clutch 3 before the desired change in the transmission ratio of the transmission 4.

FIG. 2 shows a side view of a clutch actuating device 8 according to one exemplary embodiment. The illustrated Kupplungsbetätigungsvorrich- device 8 has a housing part 9, in which a pivot member 10 is arranged. The pivoting element 10 is connected on the one hand to the switching shaft 6 and on the other hand to a torsion element 14 and is designed in two parts in the exemplary embodiment shown. However, it is also conceivable to carry out the pivoting element 10 in one piece or with more than two parts. The two-part embodiment shown here consists of a lever portion 11 connected to the switching shaft 6 and a toothed portion 12 connected to the lever portion 11 via rivets 13. Other pin-type connections, but also cohesive and other positive or positive connections are conceivable here.

By way of the toothed section 12, the positive-locking coupling with the torsion element 14 takes place here. Instead of the toothed section 12, however, a frictional coupling, such as, for example, is also used. in the form of a friction wheel between Schwenkele- element 10 and torque element 14 conceivable.

The torsion element 14 is rotatably supported via a rotation axis 17 with respect to the housing part 9 and a housing cover 21, not shown. For coupling of the pivoting element 10 and the rotating element 14, a gear wheel 15 shown in FIG. 4 is provided on the rotating element 14 as the first section. In addition, the turning element 14 has a cam 16 as a second section, which is a receptacle 18 for an end portion 35 of a Bowden cable 19 provides, which is arranged eccentrically to the axis of rotation 17. In addition to the receptacle 18, the Bowden cable 19 is guided via a guide 20 in the housing part 9. For a sheath 28 of the Bowden cable 19 is screwed in the housing. This additional guidance of the Bowden cable 19 allows a purely translational movement of the Bowden cable 19 for actuating the clutch 3. In addition, by changing the depth of engagement of the Bowden cable 19 and thus the operation of the clutch 3 can be adjusted.

FIG. 3 shows a longitudinal section through the clutch actuating device 8. For connecting the two-part pivoting element 10, a hub 23 is provided, which may be integral or multi-part with the pivoting element 10 and can be positively connected to the control shaft 6 via a profile connection 24 , In addition to a positive shaft-hub connection, non-positive connections, such as, for example, conical or shrink-fit connections, are also conceivable. In order to minimize the friction and to position the torsion element 14 with respect to the rotation axis 17 arranged in the housing part 9, needle bearings 25, 26 are provided between the rotation axis 17 and the rotation element 14. Alternatively, a sliding bearing is conceivable. To connect the Bowden cable 19 to the twisting element 14, the receptacle 18 is provided as a suspension eye 27. The suspension eye 27 is integrated into the cam 16 of the torsion element 14. In addition, the cam plate 16 has a designed as an outer contour first region 29 for radial guidance of the Bowden cable 19 and a second portion 30 for lateral guidance of the Bowden cable 19 on the rotating element 14, wherein the second region 30 is radially raised with respect to the outer contour. Also, the first region 29 and the second region 30 in the direction of the rotation axis 17 are arranged axially offset from one another.

For protection against dirt, salt or water, a housing cover 21 is provided, which is connected by means of screws 22 with the housing part 9.

Various operating states can be seen in FIGS. 4, 5a and 5b. While FIG. 4 shows the clutch actuating device 8 in a non-actuated position. shows the respective desired end positions in the flip-flop and downshift are shown in Figures 5a and 5b.

FIG. 4 illustrates the coupling of the toothed section 12 of the pivoting element 10 with the first section of the torsion element 14 designed as a gear 15. The gear is rotatably connected to the cam 16.

If, as shown in Figures 5a and 5b, the switching shaft 6 is rotated via the shift lever 7, the pivot member 10 of the rotation of the switching shaft 6 is correspondingly pivoted and the rotation element 14 connected to the pivot member 10 rotates about the rotation axis 17. As a result of the receptacle 18 arranged eccentrically with respect to the axis of rotation 17, the rotational movement of the switching shaft 6 is converted via the pivoting of the pivoting element 10 into a translational movement of the Bowden cable 19. The Bowden cable 19 thereby snuggles radially against the first region 29 and axially against the second region 30 of the cam 16 and is thereby guided. The first region 29 of the cam disc 16 has a first cam portion 31, 33, which is selected so that the clutch 3 is fully opened before the gearshift into a next gear and a second cam portion 32, 34 of the so is chosen that the clutch is held in its open position during the switching operation. In the exemplary embodiment shown in FIGS. 5a and 5b, the geometries of the curve sections for upshifting the gears (31, 32 from FIG. 5a) and the geometries of the curve sections for shifting down the gears (33, 34 from FIG. 5b ) executed the same. However, it is also conceivable to carry out these geometries differently. The first curve section 31 merges into the second curve section 32 and can have a different radius from the second curve section 32. The first curve section 33 also merges into the second curve section 34 and may have a different radius from the second curve section 34.

The preceding embodiments relate to a clutch actuation device 8, for a clutch 3 of a motorcycle, having at least one housing part 9, a pivoting element 10, a torsion element 14 and a power transmission device. element 19, wherein the pivoting element 10 is preferably rotatably connected to a switching shaft 6 of a transmission 4, the torsion element 14 is rotatably mounted on a housing part 9, the torsion element 14 coupled on the one hand with the Schwenkele- element 10 and on the other hand via the power transmission element 19 with the coupling 3 is connectable, and wherein a pivoting movement of the pivoting element 10 via the torsion element 14 in a translational movement of the power transmission elements19 is convertible.

LIST OF REFERENCES

1 powertrain

2 drive motor

3 clutch

4 gears

5 drive shaft

6 switching shaft

7 shifter

8 clutch actuator

9 housing part

10 pivoting element

11 Leverage

12 toothing section

13 rivets

14 twisting element

15 gear

16 cam

17 axis of rotation

18 recording

19 Bowden cable

20 leadership

21 housing cover

22 screws

23 hub

24 profile connection

25 first needle roller bearing

26 second needle bearing

27 suspension eye

28 Bowden cable cover

29 first area

30 second area

31 first curve section - upshift second curve section - upshift first curve section - downshift second curve section - downshift end section

Claims

claims

A clutch actuating device (8) for a clutch (3) of a motorcycle, comprising at least one housing part (9), a pivoting element (10), a torsion element (14) and a power transmission element (19),

in which

the pivoting element (10), preferably non-rotatably, with a switching shaft (6) of a transmission (4) is connectable,

the torsion element (14) is rotatably mounted on a housing part (9), the torsion element (14) is coupled on the one hand to the pivot element (10) and on the other hand can be connected to the coupling (3) via the force transmission element (19),

and wherein a pivoting movement of the pivoting element (10) via the torsion element (14) into a translational movement of the force transmission element (19) is convertible.

2. clutch actuating device (8) according to claim 1, characterized in that the pivoting element (10) and the torsion element (14) are positively or frictionally coupled together.

3. clutch actuating device (8) according to claim 1 or 2, characterized in that the torsion element (14) has a first portion (15) for coupling with the pivoting element (10) and a second portion (16) with a receptacle ( 18) for receiving an end portion (35) of the force transmission element (19).

4. clutch actuating device (8) according to claim 3, characterized in that the torsion element (14) about a rotational axis (17) is rotatably mounted, and the receptacle for the force transmission element (19) is arranged eccentrically to the rotation axis (17) on the rotation element (14).

5. clutch actuating device (8) according to claim 3 or 4, characterized in that the receptacle for the end portion (35) of the Kraftübertragungsele- element (19) is designed as a suspension eye (18).

6. clutch actuating device (8) according to claim 3, 4 or 5, characterized in that the second portion (16) of the Verdrehelements (14) as a cam disc (16) is formed.

7. clutch actuating device (8) according to claim 6, characterized in that the force transmission element (19) is designed rope-shaped, and the cam disc (16) in interaction with the force transmission element (19) is such that upon rotation of the cam disc (16) around the axis of rotation (17) the force transmission element (19) conforms to the outer contour of the cam disc (16).

8. A clutch operating device (8) according to claim 7, characterized in that the cam disc (16) has a first cam portion (31, 33) and a second cam portion (32, 34), wherein the first cam portion (31, 33) is formed in that the clutch (3) is fully opened before shifting to a next gear, and the second cam portion (32, 34) is arranged to hold the clutch (3) in its open position during the shifting operation.

9. A clutch operating device (8) according to claim 8, characterized in that the geometries of the curve sections for upshifting the gears (31, 32) and the geometries of the curve sections for downshifting the gears (33, 34) are identical or different.

10. clutch actuating device (8) according to any one of the preceding claims, characterized in that the force transmission element (19) is designed as a Bowden cable, rope or rod.