JPH0152609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a diaphragm spring clutch, comprising two
The clutch has two clutch parts, namely a pressure plate and a flywheel which holds the pressure plate in an axially movable manner, and an axially movable clutch is provided between the flywheel and the pressure plate. A disc is arranged, and a diaphragm spring is provided on one side of the pressure plate, ie opposite the flywheel, which diaphragm spring engages the flywheel in its radially outer edge region. carried on the wheel and provided with a spring finger in the radially inner edge region and spring-elastically supported on said pressure plate in the region between the radially inner edge and the outer edge; The diaphragm spring is separated from the pressure plate and flywheel when the clutch is released.

BACKGROUND OF THE INVENTION A tension-release diaphragm spring clutch of this type is known, for example, from DE 21 21 920 A1. The two clutch parts are non-rotatably connected to each other.
It is formed by a flywheel and a normal pressure plate. The flywheel is fixed to the engine crankshaft, while the clutch disc is connected to the transmission. The diaphragm spring is mounted in a separate casing that engages the diaphragm spring from behind on the side opposite the clutch section. Such an arrangement increases construction and clutch installation costs due to the need for a separate casing.

OBJECT OF THE INVENTION It is therefore an object of the present invention to make a tension-release diaphragm spring clutch of the known type simpler in construction and thus cheaper to manufacture.

According to the invention, which solves this problem, the diaphragm spring is fastened directly to the flywheel in the area of its outer edge.

Advantages This design eliminates the additional housing required in known tension release clutches.

so that when the clutch is operated, the diaphragm spring is deflected against its spring force.
The diaphragm spring must be flexibly fixed to the flywheel. this is,
The diaphragm spring is rigidly fixed to the flywheel along its outer edge by a plurality of spaced fixing parts, and a notch is formed between the fixing parts. It was then resolved. The recesses form tongues integrally formed on the diaphragm spring between the recesses, the free ends of these tongues being screwed or riveted to the flywheel. This does not impair the flexibility of the diaphragm spring. The tongues are configured to be narrower than the spacing between the tongues when viewed in the circumferential direction of the diaphragm spring, or the spacing between the fixed portions is formed by these fixed portions when viewed in the circumferential direction. As long as the radius does not correspond approximately to the radius of the circle, flexibility will not be particularly impaired.

The recess is designed as a gap with closed edges, but is preferably open towards the outer edge of the diaphragm spring.

Insofar as the flywheel is generally pot-shaped, the diaphragm spring, including the tongues, is generally flat. On the other hand, if the flywheel is formed substantially flat, the diaphragm spring may be formed in the shape of a pot.

Embodiment Next, the structure of the present invention will be specifically described with respect to an embodiment shown in the drawings.

The tension disengageable diaphragm spring clutch shown in FIGS. 1 to 3 has a pot-shaped flywheel 1 surrounding a clutch disk 3 and a pressure plate 5. . The pressure plate 5 is connected to the flywheel 1 via tangential straps 7 in a non-rotatable but axially movable manner. The tangential strap 7 is screwed directly to the clutch disc 3 on the one hand and to the pressure plate 5 via a projection 9 on the other hand. A substantially flat disk-shaped diaphragm spring 11 is fixed to the flywheel 1 on its outer periphery with screws 13. The diaphragm spring 11 is preloaded against the pressure plate 5 at an intermediate portion 15 between the radially inner edge stop and the outer edge;
Spring finger 1 protruding radially inward
7. This spring finger 17
is formed by a radially inner slit 19. The diaphragm spring 11 at the same time forms the casing of the clutch. The screw 13 is inserted into a hole formed in a tongue 21 that projects radially inward of the diaphragm spring 11. A notch 23 is formed between each tongue-like piece 21. The tongue 21 forms a flexible hinge, so that the diaphragm spring 11 can be flexibly deformed even though the tongue 21 is rigidly fixed to the flywheel 1. A starting gear 24 is arranged further outside the flywheel 1. It is also possible to permanently screw the tangential strap 7 to the diaphragm spring 11 instead of to the flywheel 1.

This tension release clutch operates as follows.

In the connected state, the clutch disk 3 is tightened between the pressure plate 5 and the flywheel 1 under the preload of the diaphragm spring 11. Thereby, forces from the internal combustion engine (not shown) are transmitted to the flywheel 1, the pressure plate 5, the clutch disk 3 and the drive shaft (also not shown). To release the connection, the spring fingers 17 are pulled away from the clutch by a disengaging mechanism (not shown), so that the diaphragm spring 11 is deformed into a conical shape and its middle part 15 is pulled together with the pressure plate 5. Dissociated in the axial direction. This causes the clutch disk 3 to be loosened between the pressure plate 5 and the flywheel 1.

4 to 6 show variations of the embodiment according to FIGS. 1 to 3. In FIGS. In this variation, the flywheel 25 is formed flat,
In contrast, the diaphragm spring 27 surrounds the pressure plate 29 and the clutch disk 31 in a pot-like manner. The diaphragm spring 27 is screwed to the flywheel 25 by a screw 35 via a tongue 33. There are notches 3 between the tongues 33 when viewed in the circumferential direction.
7 is formed, and this notch 37 extends over substantially the entire axial direction of the diaphragm spring 27. The remaining construction of this tension release clutch is the same as that of FIGS. 1-3. The effect is also the same. The pressure plate 29 is directly and fixedly attached to the tongue 41 of the diaphragm spring 27 via a tangential strap 39, as in the previous embodiment.
The tangential strap 39 may also be secured directly to the flywheel 25.

The diaphragm spring 43 shown in FIG. 7 differs from the embodiment shown in FIGS. 1 to 3 in that it has an arcuate notch 47 between the tongues 45 arranged side by side in the circumferential direction. The radius of curvature of this recess 47 is advantageously large enough to correspond to half the outer diameter of the diaphragm spring 43. According to Figure 7,
Also shown is the intermediate part 49 for abutment against the pressure plate, as well as the spring fingers 53 formed by the radial slots 51. The shape of the notch 47 shown in FIG. 7 can of course be applied to the pot-shaped diaphragm spring 27 shown in FIGS. 4 to 7.

[Brief explanation of drawings]

FIG. 1 is a plan view of a tension release type diaphragm spring clutch according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG.
3 is a partial view of the diaphragm spring clutch shown in FIG. 1 as seen in the direction of the arrow, FIG. 4 is a plan view of the diaphragm spring clutch according to the second embodiment, and FIG. 5 is a cross section taken along the line - in FIG. 4. Figure 6 is a partial view of the diaphragm spring clutch according to Figure 4, seen in the direction of the arrow;
The figure is a plan view of a diaphragm spring according to another embodiment. 1...Flywheel, 3...Clutch disk,
5... Pressure plate, 7... Tangential strap, 9... Protrusion, 11... Diaphragm spring, 13... Same, 15... Middle part, 17... Spring finger, 19... Slit, 21... Tongue piece,
23...Notch, 24...Starting gear, 25...Flywheel, 27...Diaphragm spring, 29...
Pressure plate, 31...clutch disk,
33...tongue, 35...screw, 37...notch, 39
...Tangential strap, 41... Tongue, 43... Diaphragm spring, 45... Tongue, 47... Notch, 49... Diameter.

Claims (1)

[Claims] 1. A diaphragm spring clutch, comprising:
Two clutch parts or pressure plates 5, 29 rotating about a common axis of rotation
and a flywheel 1, 25 that holds the pressure plates 5, 29 movably in the axial direction, and is movable in the axial direction between the flywheels 1, 25 and the pressure plates 5, 29. Clutch discs 3, 31 are arranged, and diaphragm springs 11, 27, 43 are provided on one side of the pressure plates 5, 29, that is, on the opposite side from the flywheels 1, 25, The diaphragm springs 11, 27, 43
is held on said flywheel 1, 25 in its radially outer edge region and is provided with spring fingers 17, 53 in its radially inner edge region, with the radially inner and outer edges The diaphragm springs 11, 27, 43 are resiliently supported by the pressure plates 5, 29 in the range between the pressure plates 5, 29 and the flywheel 1, when the clutch is released. In the type that is separated from 25,
Diaphragm spring clutch, characterized in that the outer edge areas of the diaphragm springs 11, 27, 43 are fastened directly to the flywheel 1, 25. 2 Diaphragm spring 11, 27, 43
The flywheels 1 and 2 are connected to each other by a plurality of fixed parts spaced apart from each other along the outer edges of the flywheels 1 and 2.
The diaphragm spring clutch according to claim 1, wherein the diaphragm spring clutch is rigidly fixed to the diaphragm spring clutch 5 and has cutouts 23, 37, 47 formed between the plurality of fixing parts. 3. The diaphragm spring clutch according to claim 2, wherein the fixing portion is located radially outward from the radially innermost edge of the notch 23, 37, 47. 4. A tongue-like piece 2 in which the notches 23, 37, 47 are open towards the outer edges of the diaphragm springs 11, 27, 43 and form the fixing part.
1 and 33 are provided.
Diaphragm spring clutch as described in section. 5. The diaphragm spring clutch according to claim 4, wherein the tongue-shaped piece 21 projects radially outwardly of the diaphragm spring. 6 The tongue-shaped piece 33 is the diaphragm spring 2
The flywheel 25 projects axially from the outer edge of 7 and is spaced axially from the outer edge.
A diaphragm spring clutch according to claim 4, wherein the diaphragm spring clutch is fixed to a diaphragm spring clutch. 7. The diaphragm spring clutch according to claim 4, wherein the tongue-like pieces 21, 33 are formed narrower than the spacing between the tongue-like pieces when viewed from the circumferential side of the diaphragm springs 11, 27. . 8. A diaphragm spring clutch according to claim 7, wherein the spacing between the fixing parts in the circumferential direction of the diaphragm spring corresponds approximately to the radius of a circle passing through these fixing parts. 9. The diaphragm spring clutch according to claim 4, wherein the notches 47 formed between the plurality of fixing parts have a substantially concave arc shape. 10. A diaphragm spring clutch according to claim 9, wherein the radius of curvature of the notch 47 approximately corresponds to the radius of a circle passing through the fixed part. 11 Diaphragm spring 11, 27, 43
are attached to the flywheels 1 and 2 by screws 13 and 35.
5. A diaphragm spring clutch according to claim 2, wherein the diaphragm spring clutch is screwed to the diaphragm spring clutch 5. 12 The flywheel 1 is provided with a flange which reaches the clutch disk 3 in the semi-circular direction and which reaches the pressure plate 5 in the axial direction, and the diaphragm spring 11 is substantially flat and extends in the area of its outer edge. 2. A diaphragm spring clutch according to claim 1, wherein the diaphragm spring clutch is fixed to an axially oriented end face of the flange. 13 The diaphragm spring 27 is designed as a bending section, the radially outer edge of which extends at least partially radially into the pressure plate 29 and axially into the clutch disk 31. The diaphragm spring according to claim 1, wherein the diaphragm spring is fixed to the flywheel 25, and the notch 37 extends over substantially the entire axial length of the diaphragm spring 27. Clutch. 14. Diaphragm spring clutch according to claim 13, wherein the side of the flywheel 25 facing the diaphragm spring 27 is substantially flat.