JPH04210127A - Peak-cut clutch cover - Google Patents

Abstract

PURPOSE:To hold a return spring certainly with a minimum necessary number of parts, without use of any resilient member and rivet or the like by furnishing an energizing means to energize a diaphragm spring between a folded part and the diaphragm spring. CONSTITUTION:A slit 3a is formed outermore the radial direction of a diaphragm spring 3, and a hole 3b is provided at one end of this slit 3a. Folded parts 1a, 1b of a cover 1 are inserted in this hole 3b, and a return spring 6 to energize the diaphragm spring 3 is installed between it and the folded parts 1a, 1b. Thereby the return spring 6 can be supported certainly without use of any resilient member and a rivet or the like to serve as turn stopper.

Description

[Detailed description of the invention]

[00011

[Industrial Field of Application] The present invention relates to a clutch cover using a diaphragm spring, and particularly to a peak cut clutch cover in which the load characteristics of the diaphragm spring are made flat in order to reduce changes in pedal force over time. . [0002] Conventionally, various peak cut clutch covers have been proposed in which the load characteristics of a diaphragm spring are flat. [0003] For example, in Utility Model Application Publication No. 1-169620, a diaphragm spring is supported by a clutch cover, and an annular cone spring is disposed between the clutch cover and the diaphragm spring. The spring applies a reaction force to the urging force of the diaphragm spring. In addition, in order to support the cone spring against the clutch cover without wobbling, radially outward protrusions are provided at multiple locations on the outer periphery of the cone spring, and these protrusions are connected to radially inward protrusions provided on the inner periphery of the clutch cover. It is riveted to the protruding piece in the opposite direction via an elastic body and is fixed in a non-rotatable manner. [0004]

[Problems to be Solved by the Invention] However, since the cone spring is prevented from rotating relative to the clutch cover, the protrusions facing radially outward provided at multiple locations on the outer circumference of the cone spring are The structure is such that it is riveted to a radially inward protruding piece provided on the body via an elastic body, which has the drawback that it requires a large number of parts such as rivets and takes a long time to assemble. [0005]

[Means for Solving the Problems] The present invention provides a diaphragm spring that is bored outside in the radial direction in order to reliably support the biasing means without using an elastic body or rivet for preventing rotation. A hole is provided at one end of the slit, and a biasing means for applying a biasing force to the diaphragm spring is provided between the bent portion of the cover that is inserted into the chain hole and the diaphragm spring. In this way, the biasing means can be reliably supported with a minimum number of parts. [0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of an embodiment of the apparatus of the present invention, and FIG. 2 is a view taken along the X arrow in FIG. [0007] 1 is a cover that is connected and fixed to a flywheel (not shown); 2 is a pressure plate that is included in the cover 1 and whose outer periphery is connected and fixed to the cover 1 via a rivet 5; 3 is a pressure plate 2 and the cover 1;
This is a diaphragm spring placed between the [0008] The diaphragm spring 3 has a projection piece 2a provided on the outer periphery of the pressure plate 2 that is in contact with one side thereof as an internal fulcrum, and is located radially outward from the projection piece 2a, and the cover 1 and the diaphragm spring 3 It is supported using a pivot ring 4 disposed between it as an external fulcrum. [00091 In FIG. 2, diaphragm spring 3
A hole 3 is provided at the outer end of a slit 3a that is bored radially outward.
b is provided, and the bent portions 1a and lb of the cover 1 are provided with the holes 3.
b. The bent portions 1a and lb have different lengths inward in the radial direction (la>lb) and are formed alternately in the circumferential direction. A return spring 7 is disposed between the bent portions 1a, lb and the diaphragm spring 3. [00101 Furthermore, a snap ring 8 is provided inward in the radial direction on the bent portions 1a and lb. One end of the return spring 7 is supported in contact with this snap ring 8 . Further, at a position opposite to the snap ring 8, a bent portion 1b having a larger radial length than the bent portion 1a.
A return spring 7 is supported in contact with the tip of the spring. Therefore, since the return spring 7 is fixed immovably in the axial direction, it is possible to eliminate rattling of the return spring. Therefore, in addition to reducing the pressing force of the clutch pedal over time, even if variations in the load occur when the diaphragm spring is installed, the variations can be absorbed by the return spring without wobbling. [00111 Another embodiment for fixing the return spring is shown in FIGS. 3 and 4. [00121 In FIG. 3, the tip ICs of the bent portions 1a and lb are further bent radially inward to provide the same function as the snap ring 8 in FIG. 1. In FIG. 4, instead of making the shape of the bent part the same, a recessed part 1d is formed in the bent part by pressing, and the return spring 8 is fitted into this recessed part 1d. In the case of FIGS. 3 and 4, the tip IC is bent after the return spring 7 is inserted. [0013] The operation of the above embodiment will be explained below. [0014] When the clutch pedal is depressed, the inner diameter side of the diaphragm spring 3 is pushed toward the pressure plate 2 via a release device (not shown). As a result, Figure 1
At this point, the pressure plate 2 moves to the right and the clutch becomes disengaged. As wear of the clutch facing (not shown) progresses, the pressure plate 2 is moved to the left by the diaphragm spring 3 in FIG. 1, but the load on the diaphragm spring 3 is reduced by the reaction force of the return spring 7. The depression force on the clutch pedal is kept constant over time. [0015]

As explained above, the peak cut clutch cover of the present invention can securely hold a return spring with a minimum number of parts without using elastic bodies, rivets, or the like.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a peak cut clutch cover of the present invention.

FIG. 2 is a view taken along the X arrow in FIG. 1;

FIG. 3 is an enlarged view of main parts of another embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of another embodiment of the present invention.

[Explanation of symbols]

1 Cover la, lb bent part 2 Pressure plate 2a Projection piece (supporting means) 3 Diaphragm spring 3a slit 3b hole 4 Pivot ring (supporting means) 6 Return spring (biasing means)

Claims (1)

[Claims] Claim 1: A pressure plate included in the cover;
A diaphragm spring disposed between the pressure plate and the cover, a support means for supporting the diaphragm spring between the cover and the pressure plate, and a hole bored at one end of the diaphragm spring. A peak cut clutch cover comprising a slit, a bent portion of the cover that is fitted into the hole of the slit, and a biasing means disposed between the bent portion and the diaphragm spring to apply biasing force to the diaphragm spring.