JPS62209226A - Clutch cover assembly - Google Patents

Abstract

PURPOSE:To make it possible to prevent incomplete disengagement of a clutch, by reinforcing the inner peripheral section of a clutch cover with a reinforcing plate to hold the fulcrum of a diaphragm spring. CONSTITUTION:A diaphragm spring 16 expands and retracts with respect wire rings 17, 18 as fulcrums, and therefore, exerts a load upon the inner peripheral edge section of a clutch cover body 12. However, the inner peripheral surface of the clutch cover 12 is reinforced by a reinforcing plate 26, and therefore, the deflection thereof is small. Accordingly, the fulcrums of the diaphragm spring 16 are surely held at predetermined positions, thereby it is possible to prevent incomplete disengagement of the clutch.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a clutch cover assembly used in friction clutches for automobiles and the like.

(Prior art) A plurality of tabs are integrally provided at intervals in the circumferential direction on the inner peripheral edge of a clutch cover body having a large diameter hole in the center, and a pair of fulcrum wires are placed on both sides of a diaphragm spring. Clutch cover assemblies in which a ring is supported by the tabs are already known.

This configuration has the advantage of eliminating the need to use the conventional stud bin, but since the position of the tab is limited by the radius of the wire ring, the radius of the hole in the center of the clutch cover body has to be large. .

(Problems to be Solved by the Invention) The above configuration has the problem that the radius of the hole in the center of the clutch cover body must be increased, resulting in a decrease in the rigidity of the clutch cover body. .

As a result, when the conventional clutch cover assembly is assembled to a clutch, the clutch may not be properly disengaged, or the levers on the inner circumference of the diaphragm spring may become misaligned, causing mechanical shudder.

The present invention attempts to solve the above problems.

(Means for solving the problem) A plurality of tabs are integrally provided at intervals in the circumferential direction on the inner peripheral edge of the clutch cover body having a large diameter hole in the center, and one tab is placed on both sides of the diaphragm spring. A clutch cover assembly in which a pair of fulcrum wire rings are supported by the tabs, characterized in that an annular reinforcing plate is fixed concentrically to the inner peripheral edge of the clutch cover body.

(Operation) The diaphragm spring compresses and expands using a pair of wire rings as fulcrums. At this point, the diaphragm spring flexes the inner circumference of the clutch cover body via the tab.

However, in the present invention, since the inner circumferential portion of the clutch cover is reinforced by the reinforcing plate, the period of deflection is reduced, and the fulcrum position of the diaphragm spring is reliably held at a predetermined position. As a result, faulty clutch disengagement is prevented, the positions of the levers on the inner periphery of the die 17 flamm spring are aligned, and no mechanical force sag occurs.

(Embodiment) In FIG. 1, the outer circumference of a clutch cover main body 12 having a generally annular shape is concentrically fixed to a flywheel 11 driven by an engine (not shown). A concentric clutch disc 13 is disposed in a space formed by the flywheel 11 and the clutch cover main body 12, and an output shaft (not shown) is connected to the center of the clutch disc 13 in a J shape. Further, a pressure plate 14 for pressing the clutch disc 13 toward the flywheel 11 is also arranged concentrically within the space.

The pressure plate 14 is provided with a protrusion 15 on the back surface, and the outer circumference of an annular diaphragm spring 16 is in contact with the protrusion 15.

A pair of wire rings 17 and 18 are in contact with both sides of the outer periphery of the diaphragm spring 16.

Wire ring 17.18 is diaphragm spring 1
6, and both are supported by tabs 19 of the clutch cover main body 12. Tab 19
The clutch cover body 12 has a large diameter hole 21 in the center.
A plurality of them are integrally provided at equal intervals in the circumferential direction on the inner peripheral edge of the. Further, a release bearing 20 faces the inner peripheral portion of the diaphragm spring 16 from the side opposite to the plate 14 of the prefix 11. Release bearing 2
0 is slidably provided around an output shaft (not shown), and is connected to a clutch pedal via a link mechanism (not shown).

As shown in FIG. 2, the diaphragm spring 16 has a radial slit 2 extending from the inner periphery to the outer periphery.
2, and only the portion on the outer peripheral side of the slit 22 is continuous in an annular shape. The wire rings 17, 18 abut against the inner periphery of the annular portion of the diaphragm spring 16.

The radially outer end of the slit 22 is widened in the circumferential direction of the cover to form a tab opening 24. A tab 19 integrally provided on the inner peripheral edge of the clutch cover body 12
extend to the left in the figure (towards the pressure plate 14 in FIG. 1) through the tab openings 24, respectively. Tab 19
The distal end portion is curved in a U-shape toward the outer circumferential side of the cover, thereby holding the wire rings 17, 18 in a position generally concentric with the clutch cover main body 12.

As shown in the lower half of FIG. 1, a rectangular plate-shaped tongue piece 25 is arranged between adjacent tabs 19. As shown in the lower half of FIG. Tongue piece 25
is integrally formed in the large diameter hole 21 portion of the clutch cover main body 12. Further, a reinforcing plate 2 is attached to the inner peripheral edge of the clutch cover body 12 from the outside of the clutch cover body 12.
6 are arranged concentrically. The reinforcing plate 26 is a plate-shaped annular member, and has a circumferentially long slit-shaped hole 27 at a position corresponding to the tongue piece 25. Tongue piece 25
is inserted into the hole 27 and then bent toward the outer periphery, whereby the reinforcing plate 26 is integrally fixed to the clutch cover main body 12. The inner circumferential portion of the reinforcing plate 26 extends toward the inner circumferential side of the cover, and its tip is bent at a right angle to integrally form an annular edging portion 28.

Next, the assembly work will be explained. The taradzugi force bar 12 is formed by press molding, and at that time the tongue piece 25 is formed as shown by the imaginary line in the lower half of FIG. Conventionally, adjacent tabs 1 on the inner peripheral edge of the clutch cover main body 12
9 minutes had been cut off. The tongue piece 25 is easily formed by leaving that part in a rectangular shape without cutting it off.

The reinforcing plate 26 is attached after the tab 19 is shaped into a substantially U-shape using a jig and the diaphragm spring 16 is placed in the illustrated position using wire rings 17 and 18. With the tongue piece 25 in the position of the imaginary line, insert the hole 27 of the reinforcing plate 26 into the tongue piece 25, and bend the tip of the tongue piece 25 toward the outer circumference of the cover. 12 and is firmly and integrally fixed thereto.

Next, the operation will be explained. In FIG. 1, when the clutch is connected, the diaphragm spring 16 uses the wire rings 17 and 18 as fulcrums to push the pressure plate 14 toward the flywheel 11 due to its own elasticity, and the pressure plate 14 and flywheel 11 move the clutch disc 13 is held between the two. When a clutch pedal (not shown) is depressed to disengage the clutch, the release bearing 20 pushes the inner circumference of the diaphragm spring 16 toward the flywheel 11. As a result, the diaphragm spring 16 releases its pressing force against the pressure plate 14, and the clutch disc 13 is released from being held by the flywheel 11 and the pressure plate 14.

Diaphragm spring 16 is wire ring 17.1
8 as a fulcrum, a load is applied to the inner peripheral edge of the clutch cover body 12 by the diamond slam spring 16. However, since the inner peripheral edge of the clutch cover main body 12 is reinforced by the reinforcement plate 26, there is little bending. Therefore, the fulcrum position 6 of the diaphragm spring 16 is reliably held at a predetermined position, and defective clutch disengagement is prevented. Furthermore, the positions of the levers on the inner circumference of the dart flam spring 16 are aligned, and mechanical shudder no longer occurs. That is, since the fulcrum position of the diaphragm spring 16 is constant, the operating characteristics are stabilized. This also contributes to quality stability between products.

(Another Embodiment) (a) The means for fixing the reinforcing plate 26 to the clutch cover main body 12 is not limited to the structure of the tongue piece 25 and the hole 27, and may be arc welding, spot welding, or the like.

Alternatively, as shown in FIG. 3, a rivet projecting portion 30 may be integrally formed on the inner peripheral edge of the clutch cover main body 12, and a corresponding hole may be provided in the reinforcing plate 26 (FIG. 1). In this case, after inserting the reinforcing plate 26 (FIG. 1) into the rivet projecting part 30,
By squeezing the tip of the clutch cover body 12
sticks to.

(b) The edging portion 28 may also be provided on the outer periphery of the reinforcing plate 26.

(Effects of the Invention) A plurality of tabs 19 are integrally provided on the inner peripheral edge of the clutch cover body 12 having a large diameter hole 21 in the center at intervals in the circumferential direction, and a pair of tabs 19 are arranged on both sides of the diaphragm spring 16. Connect the fulcrum wire ring 17 and 18 to the tab 1 above.
In the clutch cover assembly supported by 9, the annular reinforcing plate 26 is fixed concentrically to the inner peripheral edge of the clutch cover main body 12, so the following effects can be expected.

(a) The rigidity of the clutch cover main body 12 can be easily improved.

(b) Therefore, when the clutch cover assembly is assembled to the clutch, poor clutch disengagement and mechanical shudder can be prevented. That is, the operating characteristics of the clutch are stabilized.

(C) Also, the levers on the inner circumference of the diaphragm spring 1°6 are aligned, and the quality of each product is stabilized.

[Brief explanation of drawings]

Claims (1)

[Claims] A plurality of tabs are integrally provided at intervals in the circumferential direction on the inner peripheral edge of the clutch cover body which has a large diameter hole in the center, and a pair of fulcrum wire rings placed on both sides of the diaphragm spring are attached to the tabs. A clutch cover assembly supported by the clutch cover assembly, characterized in that an annular reinforcing plate is fixed concentrically to the inner peripheral edge of the clutch cover body.