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clutch release device

A technology of clutch device and release device, which is applied in clutches, fluid-driven clutches, mechanical-driven clutches, etc., can solve problems such as large frictional resistance, pressure difference, and hindrance to piston sliding, and achieve the effect of smooth release operation

Active Publication Date: 2021-06-29
EXEDY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in order to install the bellows cover as in Patent Document 1, a space in the radial direction is required.
In addition, in the dust cap of Patent Document 2, since the dust cap is in close contact with the outer peripheral surface of the sleeve having the piston, when the piston slides, the frictional resistance increases.
In addition, if a space is provided between the sleeve with the piston and the dust cover, a positive or negative pressure difference will be generated in the space, which may hinder the sliding of the piston.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach -

[0043] [overall composition]

[0044] figure 1 is a sectional view of the clutch release device 1 according to one embodiment of the present invention. exist figure 1 Among them, the clutch device is arranged on the left side, and the transmission is arranged on the right side. The release device 1 is a device for performing a release operation on a clutch device arranged between an engine and a transmission. That is, the release device 1 releases the pressing force of the diaphragm spring (not shown) constituting the clutch device, whereby the power transmission state in the clutch device is released.

[0045] It should be noted that, in figure 1 Among them, the upper side of the rotation center line represents the state in which the release device 1 is activated and the clutch device is disconnected (power transmission disengaged state), and the lower side represents the connected state of the clutch device when the clutch disc wears at the maximum allowable amount (powe...

no. 2 approach -

[0077] exist Figure 4 A second embodiment is shown in . In this second embodiment, compared with the first embodiment, only the structure for restricting the movement of the piston in the axial direction and the structure for fixing the dust cover 5 are different.

[0078] Specifically, in the piston 30 of the second embodiment, a recess 140 a for a stopper is formed on the inner peripheral surface of the front end portion of the sliding portion 140 . The recessed portion 140a is formed to be recessed from the front end face of the piston 30 toward the transmission side. Then, when the end surface in the axial direction which is the bottom surface of the concave portion 140 a abuts against the end surface of the stop ring 7 , movement of the piston 30 in the axial direction is restricted.

[0079] The structure of the dustproof cover 5 is the same as that of 1st Embodiment, and has the main-body part 5a, the end part 5b, and the fixing part 5c. Furthermore, a resin press-f...

no. 3 approach -

[0081] exist Figure 5 A third embodiment is shown in . In this third embodiment, only the configuration of the dust cap and the configuration of the dust seal are different from the second embodiment.

[0082] Specifically, the dustproof cap 50 is basically the same as the dustproof cap 5 of the second embodiment, and has a main body portion 50a, an end portion 50b, and a fixing portion 50c having the same shapes as those of the second embodiment. Moreover, the resin-made press-fit member 29 similar to 2nd Embodiment is attached to the fixing|fixed part 50c. The structure for fixing the dust cover 50 to the cylinder 2 is also the same. A portion different from the second embodiment is that a breathing port 50d penetrating in the radial direction is provided in a part of the main body portion 50a on the transmission side.

[0083] The dust seal 60 is made of rubber or resin, and is fixed to the inner peripheral surface of the front end portion (transmission-side end portion...

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PUM

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Abstract

The present invention provides a clutch release device having a dust-proof structure capable of reducing the occupied area in the radial direction and realizing a smooth release operation. The device includes a cylinder (2), a piston (3), a release bearing (4), a cylindrical dust cover (5) and a dust seal (6). The air cylinder (2) is arranged coaxially with the input shaft on the outer periphery of the input shaft of the transmission, and has a sliding surface. The piston (3) can move freely in the axial direction along the sliding surface of the cylinder (2). The release bearing (4) moves axially together with the piston (3) to release the clutch device. One end of the dust cover (5) is supported on the cylinder (2), and the piston (3) can slide inside the dust cover (5), and the dust cover (5) is separated from the outer peripheral surface of the piston (3) by a gap configure. The dust-proof seal (6) is arranged between the outer peripheral surface of the piston (3) and the inner peripheral surface of the dust-proof cover (5), and prevents foreign matter from entering the inner peripheral side of the piston (3).

Description

technical field [0001] The present invention relates to a clutch release device, especially a clutch release device for performing a release operation on a clutch device arranged between an engine and a transmission. Background technique [0002] A clutch release device (hereinafter, sometimes simply referred to as a "release device") is provided to release the clutch device for a vehicle (operation to release the power transmission state in the clutch device). In the release device, for example, by operating the clutch pedal, the slave cylinder is operated by oil pressure to move the release bearing in the axial direction. As the release bearing moves, the central portion of the diaphragm spring constituting the clutch device is pressed, and the pressing force applied to the clutch disc by the pressure plate is released. That is, the power transmission state in the clutch device is released. [0003] In addition, in order to reduce the pedaling force during the release op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D25/08
CPCF16D25/08F16D25/083F16D25/12F16D2300/08F16D23/148
Inventor 桥本一树江口康彦森广树
Owner EXEDY CORP