JPH058051U - Diaphragm spring - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the rigidity of the claws of diaphragm springs used in friction clutches. [Structure] The claw portion 5a of the diaphragm spring 5 is subjected to burring processing or drawing processing to form the processed portions 11 and 12, and the rigidity is increased by increasing the sectional modulus of the claw portion 5a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a diaphragm spring used for a friction clutch.

[0002]

[Prior Art]

 FIG. 3 shows a dry type single plate clutch as an example of the friction clutch. Reference numeral 1 is a flywheel connected to the engine crankshaft, and 2 is a clutch disk provided on a clutch shaft 3 located coaxially with the crankshaft. The pressure plate 4 is located on the side of the clutch disc 2 opposite to the flywheel 1, and the spring force is applied to the pressure plate 4 by the diaphragm spring 5 so that the pressure plate 4 is pressed against the flywheel 3 side. The clutch disk 2 is sandwiched between the flywheel 3 and the pressure plate 4, and the driving force is transmitted from the flywheel 1 to the clutch shaft 3 by the frictional force.

To disengage the clutch, the clutch pedal 10 is depressed. That is, when the clutch pedal 10 is stepped on, the link 6 moves to the right in the figure, the release fork 7 connected to the link 6 rotates, the release bearing 8 moves to the left, and the center side portion of the diaphragm spring 5 is moved. Press the (claw) 5a. The peripheral portion (spring portion) 5b of the diaphragm spring 5 moves to the right with the pivot ring 9 as a fulcrum, and releases the pressing force on the pressure plate 4. As a result, the clutch disc 2 and the pressure plate 4 are separated from each other, and the driving force is cut off.

[0004]

[Problems to be solved by the device]

 However, in the above clutch, since the diaphragm spring 5 has the flat claw portion 5a as shown in FIG. 4, this portion bends when pushed by the release bearing 8 and the stroke of the release bearing 8 is reduced. There was a waste.

[0005]

[Means for Solving the Problems]

 In order to solve the above problem, in the present invention, in order to increase the rigidity of the claw portion of the diaphragm spring, the claw portion is processed to change its cross-sectional shape.

[0006]

[Action]

 Since the claw is processed so that its cross-sectional shape changes, the claw has a large section modulus and rigidity is improved.

[0007]

【Example】

 FIG. 1 shows a front surface of a diaphragm spring according to an embodiment, and FIG. 2 shows a cross section taken along the line AA of FIG.

The diaphragm spring 5 is composed of a claw portion 5a on the center side and a spring portion 5b on the periphery. The claw portion 5a is divided and formed by radially inserting a large number of slits 13.

In order to increase the rigidity of the claw portion 5a pushed by the release bearing, the claw portion 5a is subjected to a burring process (piercing process) in the radial direction as shown in FIG. 2 (a) or the same figure (b). As shown in FIG. In the figure, 11 is a burring part and 12 is a drawing part.

As described above, the number of cross-sections is increased by subjecting the claw portion 5a to the processing whose cross-sectional shape is changed, and the rigidity of the claw portion 5a is improved. Therefore, when it is used for a clutch, the stroke of the release bearing is reflected as the stroke of separation of the spring portion 5b of the diaphragm spring 5 without waste. In other words, the responsiveness of the clutch is improved.

The processing provided on the claw portion 5a is not limited to burring processing and drawing processing, and any processing that changes the cross-sectional shape may be performed.

[0012]

[Effect of the device]

 According to the diaphragm spring of the present invention, since the claw portion is retroactively processed, the rigidity is improved, and when used in the clutch, the stroke of the release bearing is not wasted and the response is improved.

[Brief description of drawings]

FIG. 1 is a front view of a diaphragm spring according to an embodiment.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view of a friction clutch.

FIG. 4 is a front view of a conventional diaphragm spring.

5 (a) is a sectional view taken along the line BB in FIG.
(B) is CC sectional view taken on the arrow.

[Explanation of symbols]

 5 Diaphragm spring 5a Claw part 5b Spring part 11 Burring part 12 Drawing part

Claims (1)

[Claims for utility model registration] [Claim 1] A diaphragm spring, characterized in that in order to increase the rigidity of the claw portion of the diaphragm spring, the claw portion is processed to change its cross-sectional shape.