EP3610165A1

EP3610165A1 - Friction clutch assembly for a motor vehicle

Info

Publication number: EP3610165A1
Application number: EP18714429.0A
Authority: EP
Inventors: Martin Chambrion; Tim Schmid
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2017-04-13
Filing date: 2018-03-13
Publication date: 2020-02-19
Also published as: DE102017107986A1; WO2018188685A1; DE112018001978A5

Abstract

The invention relates to a friction clutch assembly for a motor vehicle, for transmitting a torque from an input shaft to an output shaft, which shafts have a common axis of rotation, said friction clutch assembly at least comprising an input shaft, an output shaft and a friction clutch. The friction clutch comprises at least - an outer disk carrier, which is torque-transmittingly connected to the input shaft and to at least one outer disk, - an inner disk carrier, which is torque-transmittingly connected to the output shaft and to at least one inner disk, - a diaphragm spring, and - a support spring. The diaphragm spring has a first force edge on the outside in a radial direction for connecting the disks and can be actuated by an actuating apparatus by means of diaphragm spring finger ends arranged inside in the radial direction. The diaphragm spring is fixed between the force edge and the diaphragm spring finger ends in the radial direction with respect to an axial direction by means of a diaphragm spring mount. The diaphragm spring mount is formed at least by the support spring. The support spring is preloaded by means of a threaded nut.

Description

Friction clutch arrangement for a motor vehicle

The invention relates to a friction clutch assembly for a motor vehicle, for the switchable transmission of torque from a drive shaft to an output shaft having a common axis of rotation. The friction clutch arrangement is provided in particular for coupling a crankshaft of an automobile engine with at least one transmission input shaft of a motor vehicle transmission. The friction clutch arrangement can be used in particular as a (wet, ie operated in an oil bath) friction clutch arrangement for a motorcycle.

From WO 2013/000455 A1 a friction clutch is known, in which case a disc spring bearing of a diaphragm spring is realized via a support disk. The support disk is connected via a bayonet lock with the friction clutch. For an exchange of the slats of the friction clutch, a release of the support disk is necessary. The bayonet catch can only be removed with a special tool.

Furthermore, an exact tuning of the individual parts of the friction clutch is required by the use of the support disk in order to achieve a fixation of the plate spring with respect to the axial direction. For this, tolerances of the individual parts must be strictly adhered to.

There is a continuing need to improve a friction clutch assembly and a friction clutch in terms of their function and handling.

It is the object of the invention to provide a friction clutch assembly and a friction clutch which is inexpensive to manufacture and easy to assemble or disassemble with conventional tools.

The object is achieved according to the invention by a friction coupling arrangement having the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent formulated claims. The individual features listed in the dependent claims are technologically meaningful way combined with each other and can define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

It is proposed a friction clutch assembly for a motor vehicle, for transmitting a torque from a drive shaft to an output shaft having a common axis of rotation. The friction clutch arrangement comprises at least one drive shaft and one output shaft and a friction clutch, at least

an outer plate carrier, which is connected in a torque-locking manner to the drive shaft and to at least one outer plate,

an inner plate carrier, which is connected in a torque-locking manner to the output shaft and to at least one inner plate,

a plate spring having a first end face and a second end face, which is actuated via an actuating device for forming and releasing a frictional connection between the at least one outer fin and the at least one inner fin, wherein the blades are actuated via the first end face of the disc spring; such as

a support spring

includes. The plate spring has for connecting the slats in a radial direction on the outside a first force edge and is operable via in the radial direction inwardly arranged plate spring tongue ends via the actuating device. The plate spring is fixed in the radial direction between the force edge and the plate spring tongue ends with respect to an axial direction by a disc spring bearing. The diaphragm spring bearing is formed on the second end face by the support spring. The support spring is biased by a threaded nut, wherein the threaded nut is screwed onto one end of the output shaft.

Here it is particularly proposed to form the disc spring bearing at least on one side of the plate spring by a support spring. The support spring has a spring stiffness and can be biased by a threaded nut. The spring stiffness and elasticity of the support spring make it possible to make smaller demands on tolerances of the individual parts of the friction coupling arrangement. NEN. Furthermore, a threaded nut can be fixed with conventional tools and released again. The use of special tools is therefore not required.

In particular, the friction clutch is a multi-plate clutch having a plurality of outer plates and inner plates.

In particular, a torque of an automotive engine is transmitted via the drive shaft in the friction clutch assembly. The torque can be transmitted to the output shaft via a non-positive connection of the outer plates with the inner plates.

In particular, the inner plate carrier is connected via a hub part with the output shaft torque-locking. Preferably, the output shaft extends from the drive side of the friction clutch assembly along the axial direction through the hub portion and is there connected to the threaded nut.

In particular, the support spring is centered by the inner plate carrier relative to the axis of rotation.

In particular, the support spring is supported relative to the axial direction on a stop of a support ring, wherein the support ring is fixed by the threaded nut on the output shaft.

Preferably, the support ring is centered by the support spring with respect to the axis of rotation (in the radial direction).

In particular, an actuating bearing of the actuator is centered by the support ring relative to the axis of rotation. In particular, a rotational movement of the individual parts of the friction clutch coupling arrangement is decoupled from the actuating device via the actuating bearing.

The disk spring tongue ends are moved along the axial direction via the actuating device, so that the first force edge either transmits an actuating force to the disks and thus frictionally connects the disks with one another or the first force edge is moved away from the slats, so that a frictional connection of the slats is released.

In particular, the support spring is annular and extends from the diaphragm spring bearing with a spring portion along the axial direction and following the spring portion with a second force edge along the radial direction toward an inner circumferential surface, wherein the support spring on the inner peripheral surface a plurality of Having centering tongues which extend along the radial direction through openings of the support ring, wherein the support spring is supported on the centering tongues on the stop of the support ring.

In particular, the support spring is centered over the spring portion on the inner plate carrier relative to the axis of rotation.

In particular, the support ring has an annular base body, via which the support ring with the threaded nut on the output shaft can be fastened, wherein the support ring extending from the base body along the axial direction with a wall portion; wherein the wall portion has a plurality of openings and forms the stop.

The main body can be such. B. be clamped over the threaded nut between the end of the output shaft and the threaded nut.

In particular, the wall portion extends from the base body along the axial direction to a termination, wherein the openings extend along the axial direction to the conclusion, wherein the wall portion is formed by a plurality of hook elements, which in the circumferential direction through the Openings are spaced from each other.

It is further proposed a friction clutch for the friction clutch assembly described above. The friction clutch comprises at least:

an outer plate carrier which is connected in a torque-locking manner to at least one outer plate, an inner plate carrier, which is connected in a torque-locking manner to at least one inner plate,

a support spring.

The plate spring has for connecting the slats in a radial direction on the outside a first force edge and is operable via in the radial direction inwardly arranged plate spring tongue ends via the actuating device. The plate spring is fixed in the radial direction between the force edge and the plate spring tongue ends with respect to an axial direction by a disc spring bearing. The diaphragm spring bearing is formed on the second end face by the support spring. The support spring (only) can be prestressed by means of a threaded nut, wherein the threaded nut can be screwed onto one end of the output shaft.

The comments on the friction clutch arrangement also apply to the friction clutch and vice versa.

There is further proposed a method of assembling the friction clutch assembly described above. The method comprises at least the following steps:

a) providing a drive shaft and an output shaft;

b) providing the friction clutch described above;

c) arranging the friction clutch on the drive shaft and the output shaft; d) fixing the plate spring and biasing the support spring by attaching the threaded nut to the output shaft.

The comments on the friction clutch assembly and the friction clutch also apply to the method of assembly and vice versa.

The disassembly of the friction clutch or the changing of the slats takes place by loosening the threaded nut. With the threaded nut, the support spring (and if present the support ring) and then the diaphragm spring are removed, so that the slats are accessible.

By way of precaution, it should be noted that the numerical terms used here ("first", "second",...) Primarily (only) serve to distinguish a plurality of similar objects, variables or processes, ie in particular no dependence and / or order of these objects, quantities or mandate processes to one another. If a dependency and / or order are required, this is explicitly stated here or it obviously results for the person skilled in the art when studying the concretely described embodiment.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. The same reference numerals designate the same objects, so that explanations of other figures can be used if necessary. Show it:

Fig. 1 is a perspective view of a known friction clutch assembly in section;

Fig. 2: a side view of a friction clutch assembly with dismantled

Nut;

3 is a side view of a friction clutch assembly with mounted

Nut;

4 shows a perspective view of a support ring; and

Fig. 5: perspective view of a support spring. Fig. 1 shows a perspective view of a known friction clutch assembly 1 in section. The friction clutch assembly 1 comprises a drive shaft 2 and an output shaft 3 and a friction clutch 4. The friction clutch 4 comprises an outer plate carrier 6, which is torque-locked to the drive shaft 2 and a plurality of outer plates 7, an inner plate carrier 8, with the Output shaft 3 and a plurality of inner fins 9 is torsionally connected, a plate spring 10 having a first end face 1 1 and a second end face 12, via an actuator 32 for forming and releasing a frictional connection between the outer fins 7 and the inner fins 9 is actuated or actuated, wherein the slats 7, 9 are actuated via the first end face 1 1 of the plate spring 10 and are actuated and a support spring 13. The plate spring 10 has for connecting the slats 7, 8 in a radial direction fourteenth outside a first force border 15 and is over in the radial direction 14 arranged inside plate spring tongue ends 16 via the actuator 32 operable. The plate spring 10 is fixed in the radial direction 14 between the first force edge 15 and the plate spring tongue ends 16 with respect to an axial direction 17 by a disc spring bearing 18. The disc spring bearing 18 of the plate spring 10 is realized via a support plate 37. The support disk 37 is connected via a bayonet lock 38 with the inner disk carrier 8 of the friction clutch 4. For an exchange of the fins 7, 9 of the friction clutch 4, a release of the support plate 37 is necessary. The bayonet lock 38 is solvable only with a special tool.

Fig. 2 shows a side view of a friction clutch assembly 1 with threaded nut 19 removed. Fig. 3 shows a side view of a friction clutch assembly 1 with threaded nut 19 mounted. Figs. 2 and 3 will be described together below. The friction clutch assembly 1 comprises a drive shaft 2 and an output shaft 3 and a friction clutch 4. The friction clutch 4 comprises an outer plate carrier 6, which is torque-locked to the drive shaft 2 and a plurality of outer plates 7, an inner plate carrier 8, with the Output shaft 3 and a plurality of inner plates 9 is torque-connected, a plate spring 10 having a first end face 1 1 and a second end face 12, via an actuating device 32nd for forming and releasing a frictional connection between the outer plates 7 and the inner plates 9 is actuated, wherein the blades 7, 9 on the first end face 1 1 of the plate spring 10 are actuated and a support spring 13. The plate spring 10 has to connect the slats 7, 8 in a radial direction 14 outside a first force edge 15 and is operable via in the radial direction 14 internally disposed plate spring tongue ends 16 via the actuator 32. The plate spring 10 is fixed in the radial direction 14 between the first force edge 15 and the plate spring tongue ends 16 with respect to an axial direction 17 by a disc spring bearing 18. The diaphragm spring bearing 18 is formed on the second end face 12 by the support spring 13. The support spring 13 is biased by a threaded nut 19, wherein the threaded nut 19 is screwed onto one end 20 of the output shaft 3 and is screwed.

The disc spring bearing 18 is formed on one side of the plate spring 10 by a support spring 13. The support spring 13 has a spring stiffness and is biased by the threaded nut 19. The spring stiffness and elasticity of the support spring 13 make it possible that tolerances of the individual parts of the friction clutch assembly 1 lower demands can be made. Furthermore, a threaded nut 19 can be fixed with conventional tools and released again. The use of special tools is therefore not required.

The inner plate carrier 8 is connected via a hub part 35 with the output shaft 3 torque-locking. The output shaft 3 extends from a drive side 36 of the friction clutch assembly 1 along the axial direction 17 through the hub portion 35 therethrough, where it is connectable to the threaded nut 19.

The support spring 13 is arranged centered by the inner plate carrier 8 with respect to the axis of rotation 4. The support spring 13 is supported relative to the axial direction 17 on a stop 21 of a support ring 22, wherein the support ring 22 is fixed by the threaded nut 19 on the output shaft 3. The support ring 22 is centered by the support spring 13 with respect to the rotation axis 4 (in the radial direction 14). An actuating bearing 23 of the actuating device 32 is arranged centered by the support ring 22 with respect to the axis of rotation 4. About the actuating bearing 23, a rotational movement of the individual parts of the friction clutch assembly 1 is decoupled from the actuator 32.

About the actuator 32, the plate spring tongue ends 16 are moved along the axial direction 17, so that the first force edge 15 either an actuating force on the slats 7, 9 transmits and thus the slats 7, 9 positively connects with each other or the first force edge 15 of the slats , 9 is moved away, so that a frictional connection of the slats 7, 9 is released.

The support spring 13 is annular and extends, starting from the diaphragm spring bearing 18 with a spring portion 24 along the axial direction 17 and subsequent to the spring portion 24 with a second force edge 25 along the radial direction 14 toward an inner peripheral surface 26, wherein the support spring 13 on the inner peripheral surface 26 has a plurality of centering tongues 27 which extend along the radial direction 14 through openings 28 of the support ring 22, wherein the support spring 13 is supported on the centering tongues 27 on the stop 21 of the support ring 22. The support spring 13 is centered over the spring portion 24 on the inner plate carrier 8 with respect to the axis of rotation 4.

The support ring 22 has an annular base body 29, via which the support ring 22 with the threaded nut 19 on the output shaft 3 is fastened or secured, wherein the support ring 22 extends from the base body 29 along the axial direction 4 with a wall portion 30 ; wherein the wall portion 30 has a plurality of openings 28 and forms the stop 21.

The main body 29 can be clamped over the threaded nut 19 between the end 20 of the output shaft 3 and the threaded nut 19.

In the method for assembling the friction clutch assembly 1 described above, step a) comprises providing a drive shaft 2 and an output shaft 3. Step b) comprises providing the friction clutch 5 described above. Step c) comprises arranging the friction clutch 5 at the Drive shaft 2 and the output shaft 3rd step d) includes fixing the plate spring 10 and biasing the support spring 13 by attaching the threaded nut 19 to the output shaft. 3

With the threaded nut 19, the support spring 13 and the support ring 22 and then the plate spring 10 are removed, so that the blades 7, 9 accessible are.

4 shows a perspective view of a support ring 22. The support ring 22 has an annular base body 29, via which the support ring 22 with the threaded nut 19 on the output shaft 3 is fastened or fixed (see FIGS. 2 and 3), wherein extending the support ring 22, starting from the base body 29 along the axial direction 4 with a wall portion 30; wherein the wall portion 30 has a plurality of openings 28 and forms the stop 21.

The wall portion 30 extends from the base body 29 along the axial direction 17 to a termination 31, the openings 28 extending along the axial direction 17 to the termination 31, the wall portion 30 being formed by a plurality of hook elements 33 is, which are arranged spaced apart in the circumferential direction 34 through the openings 28.

Fig. 5 shows a perspective view of a support spring 13. The support spring 13 is annular and extends from the diaphragm spring bearing 18 with a spring portion 24 along the axial direction 17. The spring portion 24 is formed by a plurality of spring tongues in the circumferential direction 34 are arranged evenly distributed. Subsequent to the spring portion 24, the support spring 13 extends with a second force edge 25 along the radial direction 14 toward an inner peripheral surface 26, wherein the support spring 13 on the inner peripheral surface 26 has a plurality of centering tongues 27 extending along the radial direction 14 extend through openings 28 of the support ring 22, wherein the support spring 13 is supported via the centering tongues 27 on the stop 21 of the support ring 22. The support spring 13 is centered on the inner disk carrier 8 with respect to the axis of rotation 4 via the spring portion 24 (see FIGS. 2 and 3).

Reference character list Friction clutch arrangement

drive shaft

output shaft

axis of rotation

friction clutch

outer plate carrier

outer lamella

inner plate carrier

inner lamella

Belleville spring

first end face

second end face

support spring

radial direction

first force border

Belleville spring tongue end

axial direction

Disk spring storage

threaded nut

The End

attack

support ring

operation seat

spring section

second force border

inner peripheral surface

centering tongue

opening

body

wall section

graduation

actuator Hook elements circumferential direction hub part

Drive side Support disk Bayonet catch

Claims

claims

1 . A friction clutch arrangement (1) for a motor vehicle, for transmitting a torque from a drive shaft (2) to an output shaft (3) having a common axis of rotation (4), at least comprising a drive shaft (2) and an output shaft (3) and a friction clutch (5), which at least

an outer plate carrier (6), which is connected in a torque-locking manner to the drive shaft (2) and to at least one outer plate (7),

an inner plate carrier (8) which is connected in a torque-locking manner to the output shaft (3) and to at least one inner plate (9),

- A plate spring (10) having a first end face (1 1) and a second

End face (12), which is actuated via an actuating device (32) for forming and releasing a frictional connection between the at least one outer fin (7) and the at least one inner fin (9), wherein the lamellae (7, 9) via the first end face (1 1) of the plate spring (10) are actuated; such as

a support spring (13)

comprising, wherein the plate spring (10) for connecting the lamellae (7, 9) in a radial direction (14) outside a first force edge (15) and in the radial direction (14) arranged inside plate spring tongue ends (16) via the actuating device (32) is operable; wherein the plate spring (10) in the radial direction (14) between the first force edge (15) and the plate spring tongue ends (16) relative to an axial direction (17) by a disc spring bearing (18) is fixed, wherein the plate spring bearing (18) on the second end face (12) is formed by the support spring (13), wherein the support spring (13) via a threaded nut (19) is biased, wherein the threaded nut (19) on one end (20) of the output shaft (3) is screwed.

Second friction clutch assembly (1) according to claim 1, wherein the support spring (13) through the inner disc carrier (8) relative to the axis of rotation (4) is arranged centered.

3. Friction clutch assembly (1) according to any one of the preceding claims, wherein the support spring (13) relative to the axial direction (17) on a stop (21) of a support ring (22) is supported, wherein the support ring (22) by the threaded nut (19 ) is attached to the output shaft (3).

4. Friction clutch assembly (1) according to claim 3, wherein the support ring (22) through the support spring (13) relative to the axis of rotation (4) is arranged centered.

5. A friction clutch assembly (1) according to any one of the preceding claims 3 and 4, wherein an actuating bearing (23) of the actuating device (32) through the support ring (22) relative to the axis of rotation (4) is arranged centered.

6. friction clutch assembly (1) according to any one of the preceding claims 3 to 5, wherein the support spring (13) is annular and extends from the diaphragm spring bearing (18) with a spring portion (24) along the axial direction (17) and in the connection to the spring portion (24) extending with a second force edge (25) along the radial direction (14) towards an inner peripheral surface (26), the support spring (13) having on the inner peripheral surface (26) a plurality of centering tongues (27 ) which extend along the radial direction (14) through openings (28) of the support ring (22), wherein the support spring (13) via the centering tongues (27) on the stop (21) of the support ring (22) is supported.

7. Friction clutch assembly (1) according to any one of the preceding claims 3 to 6, wherein the support ring (22) has an annular base body (29) via which the support ring (22) with the threaded nut (19) on the output shaft (3) can be fastened wherein the support ring (22) extends from the base body (29) along the axial direction (17) with a wall portion (30); wherein the wall portion (30) has a plurality of openings (28) and forms the stop (21).

A friction coupling arrangement (1) according to claim 7, wherein the wall portion (30) extends from the base body (29) along the axial direction (17) to a termination (31), the openings (28) extending extend along the axial direction (17) to the termination (31), the wall portion (30) being formed by a plurality of hook members (33) spaced apart in a circumferential direction (34) through the openings (28) ,

9. friction clutch (5) for a friction clutch assembly (1) according to any one of the preceding claims, comprising at least

an outer plate carrier (6), which is connected in a torque-locking manner to at least one outer plate (7),

an inner plate carrier (8) which is connected in a torque-locking manner to at least one inner plate (9),

- A plate spring (10) having a first end face (1 1) and a second end face (12) via an actuating device (32) for forming and releasing a frictional connection between the at least one outer fin (7) and the at least one inner Slat (9) can be actuated, wherein the slats (7, 9) on the first end face (1 1) of the plate spring (10) are actuated; such as

- A support spring (13);

wherein the plate spring (10) for connecting the lamellae (7, 9) in a radial direction (14) has a first force edge (15) on the outside and in the radial direction (14) arranged inside plate spring tongue ends (16) via the actuating device (32 ) is operable; wherein the plate spring (10) in the radial direction (14) between the first force edge (15) and the plate spring tongue ends (16) relative to an axial direction (17) by a disc spring bearing (18) is fixed, wherein the plate spring bearing (18) on the second end face (12) by the support spring (13) is formed, wherein the support spring (13) via a threaded nut (19) is prestressed, wherein the threaded nut (19) on one end (20) of the output shaft (3) can be screwed

10. A method of assembling a friction coupling arrangement (1) according to one of the preceding claims 1 to 8, comprising at least the following steps:

a) providing a drive shaft (2) and an output shaft (3);

b) providing a friction clutch (5) according to claim 9; c) arranging the friction clutch (5) on the drive shaft (2) and the output shaft (3);

d) fixing the plate spring (10) and biasing the support spring (13) by attaching the threaded nut (19) on the output shaft (3).