KR100552736B1 - Clutch release cylinder - Google Patents

Abstract

The present invention relates to a clutch release cylinder provided in a manual transmission vehicle, comprising: a cylinder body in which hydraulic pressure acts according to an operation of a clutch pedal; A piston linearly moved according to the hydraulic pressure in the cylinder body; It is composed of a compensable push rod configured to transfer the action force to the release fork while moving by the piston, and to compensate the amount of movement due to the clutch disc wear in the middle part, thereby eliminating the need for a space considering the piston position variation. The size can be reduced, and the pedal pedal of the clutch pedal and the variation of the stroke allowance can be minimized, thereby improving the operator's feeling and convenience.

Clutch, Clutch Disc, Release Fork, Push Rod

Description

Clutch release cylinder {CLUTCH RELEASE CYLINDER}

1 is a perspective view showing a general clutch operation mechanism,

Figure 2 is a side cross-sectional view of a clutch using a conventional clutch release cylinder, a state diagram before the clutch disk is worn,

3 is a side cross-sectional view of a clutch in which a conventional clutch release cylinder is used, and a state diagram when the clutch disc is worn,

4 is a side cross-sectional view of a clutch using a clutch release cylinder according to the present invention;

5 is a detailed cross-sectional view showing a clutch release cylinder according to the present invention;

6 and 7 are flowcharts showing the operating state of the clutch release cylinder according to the present invention.

<Explanation of symbols for the main parts of the drawings>

50: clutch disc 54: release fork

60: release cylinder 61: cylinder body

61a: stopper 62: piston

63: piston spring 64: protective boot

65: compensable push rod 66: inner push rod

67: wedge 68: outer push rod

69: cylinder 70: compensation plate

71: Reward Spring 73: Reward Ball

74: stopper rod 75: engaging portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch release cylinder provided in a manual shift vehicle. In particular, the present invention relates to a clutch release cylinder including a mechanism for compensating a movement amount according to wear of a clutch disc. It is about a release cylinder.

In general, the clutch of the manual transmission is installed between the flywheel and the input shaft of the transmission to control the power of the engine transmitted to the transmission as necessary, and connects to the engine when starting the engine or shifting the gear of the transmission. When you cut off and oscillate, it serves to connect the power of the engine slowly.

1 is a perspective view showing a clutch operating structure including a clutch release cylinder of the prior art.

The clutch operating structure shown in FIG. 1 is provided with a master cylinder 13 connected by a clutch pedal 11 and a push rod 12 so that the release cylinder 20 is driven by hydraulic pressure acting on the master cylinder 13 during clutch operation. The release cylinder 20 pushes the release bearing 15 while operating the release fork 14.

The release bearing 15 moves the pressure plate backward through the diaphragm spring 16 so that the clutch disc 18 is spaced apart from the flywheel to shut off power to the engine.

On the other hand, Figure 2 is a cross-sectional view showing the clutch when the clutch disk is not worn, Figure 3 is a cross-sectional view showing the clutch state when the clutch disk is worn.

In Fig. 2, reference numeral 14 is a release fork, 15 is a release bearing, 16 is a diaphragm spring, 17 is a pressure plate and 18 is a clutch disc. And 5 is a flywheel and 20 is a release cylinder.

As shown in FIG. 2, the angle between the release fork 14 and the release cylinder 20 is almost perpendicular before the clutch disc 18 wears.

However, when the clutch disc 18 wears, as shown in FIG. 3, the pressure plate 17 moves forward toward the flywheel 5 as the clutch disc 18 wears, thereby changing the position of the diaphragm spring 16. The release bearing 15 is moved toward the rear derailleur. At the same time, the release fork 14 is also moved, so that the release cylinder 20 moves the piston 22 inside the body 21 to the rear.

Therefore, after the clutch disk 18 is worn, the piston 22 is moved to the rear, and the stroke neutral state is moved to the rear. Therefore, the cylinder body which is the rear of the piston is considered in consideration of the amount of movement of the piston 22 due to wear from the initial design. Free space must be provided within (21).

As a result, the release cylinder of the prior art as described above always needs a free space in consideration of the amount of clutch wear, the size of the body 21 as a whole increases, and also the push rod 23 according to the neutral state movement of the release fork 14 There is a problem that the stroke of the clutch pedal and the clutch operation efficiency are reduced by changing the contact point of operation with a larger angle from vertical.

The present invention has been made to solve the above problems, by installing a mechanism for compensating the amount of movement due to clutch wear on the push rod can minimize the size of the cylinder and at the same time reduce the reduction in clutch operation force and operation efficiency The purpose is to provide a clutch release cylinder.

Clutch release cylinder according to the present invention for realizing the above object, the cylinder body which the hydraulic pressure acts according to the operation of the clutch pedal; A piston linearly moved according to the hydraulic pressure in the cylinder body; And a compensable push rod configured to transfer the action force to the release fork while moving by the piston, and to compensate the movement amount due to clutch disc wear in the middle portion.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

4 is a side cross-sectional view of a clutch using a clutch release cylinder according to the present invention, and FIG. 5 is a detailed cross-sectional view showing the clutch release cylinder according to the present invention.

As shown in FIG. 5, the clutch release cylinder according to the present invention is connected to a master cylinder, and includes a cylinder body 61 in which hydraulic pressure acts according to the operation of the clutch pedal, and is provided in the cylinder body 61 to control the hydraulic pressure. A piston 62 linearly moved along with it, a piston spring 63 providing an elastic force to the piston 62 in the cylinder body 61, and a release fork 54 moving by the piston 62; A compensable push rod 65 configured to transmit an acting force and compensate the amount of movement due to the wear of the clutch disc 50 in the middle portion, and the compensable push rod 65 in front of the cylinder body 61. It is composed of a protective boot 64 is coupled to the protection to prevent foreign matter from penetrating inside.

The compensable push rod 65 has an inner push rod 66 connected to the piston 62 and a cylindrical portion 69 into which the inner push rod 66 is inserted and acts on the release fork 54. The outer push rod 68 and the inner push rod 66 in the cylindrical portion 69 of the outer push rod 68 is coupled to the inner push rod 66 in the wedge action to compensate for the movement amount due to the clutch disk wear Means are provided.

The compensation means includes a wedge portion 67 provided at an end of the inner push rod 66, a correction plate 70 positioned to correspond to the wedge portion 67 in the outer push rod 68, and A correction spring 71 providing elastic force to the correction plate 70 in the cylindrical portion 69, and wedge coupling means positioned in front of the correction plate 70 to which the wedge portion 67 is coupled or separated; And stopper means for limiting the amount of movement when the outer push rod 68 returns to its original position, that is, when the driver does not operate the clutch.

The wedge engaging means is a cylindrical stopper rod 74 to prevent the correction ball 73 and the wedge portion 67 from deviating from the correction ball 73 arranged in the circumferential direction from the front of the correction plate 70. It is composed of

The stopper means includes a locking portion 75 protruding in a flange shape in a circumferential direction from an end of the stopper rod 74, and installed on the cylinder body 61 so as to be caught by the locking portion 75 and the stopper rod 74. It consists of a stopper 61a which limits the movement of.

Referring to Figures 6 and 7, the operation of the clutch release cylinder according to the present invention configured as described above are as follows.

When the driver presses the clutch pedal, the driving force is transmitted in the order of the clutch release cylinder 60, the release fork 54, the release bearing 55, the diaphragm spring 56, and the pressure plate 57 as shown in FIG. As the 50 is spaced apart from the flywheel 58, the power transmitted from the engine to the transmission is interrupted.

At this time, as shown in (A) of FIG. 6, the inner push rod 66 and the outer push rod 68 of the compensable push rod 65 maintain contact between the wedge portion 67 and the correction ball 73. And the inner push rod 66 is moved by the X distance, and the outer push rod 68 and the release fork 54 are moved by the Y distance smaller than the X distance, which is the correction spring ( 73) is possible because it is compressed.

When the driver releases the clutch pedal in such a state, the inner push rod 66 and the outer push rod 68 move backward as shown in FIG. 6B, and the outer push rod ( 68 and the stopper rod 74 are caught in the stopper 61a to be in a stopped state, and the inner push rod 66 continues to move to the hydraulic release area. Thus, as shown in FIG. 6C, the wedge 67 of the inner push rod 66 is spaced apart from the compensation ball 73, and the inner push rod 66 has moved to the initial operation start position. Stop.

In this state, when the clutch disc 50 is worn and the release fork 54 moves as much as the amount of wear of the clutch disc as shown in FIG. 7D, the outer push rod 68 is also the release fork. Compensation according to the amount of wear is made while moving by the amount of movement (Z 'to Z) of 54, which is released by the cylindrical portion 69 of the outer push rod 68 by the restoring force of the correction spring 73. This is possible because it is pushed to the fork 54 side.

Subsequently, when the driver presses the clutch pedal, the wedge portion 67 is integrally coupled to the compensation ball 73 while the inner push rod 66 moves forward as shown in FIG. 7E. As shown in 7F, the inner push rod 66 and the outer push rod 68 move forward together to move the release fork 54 such that the clutch disc 50 is spaced apart from the fly wheel 58.

Here, as shown in (F) of FIG. 7, even when the clutch disc 50 is worn with X as the movement amount of the inner push rod 66, no change occurs in the operating distance X compared to the initial stage. In addition, the outer push rod 68 is also moved forward by the same distance as the initial distance through the restoring force of the compensating spring 73 while the clutch disc is moved backward by the worn distance, so that the initial working distance Y is unchanged. do.

The clutch release cylinder according to the present invention constructed and operated as described above has a compensation mechanism installed on the push rod to compensate for the amount of movement due to the wear of the clutch disk. Since the retraction is suppressed by touching the stopper on the body side, there is no fluctuation, and as a result, there is no need to separately form a free space on the cylinder body side in consideration of the positional change of the piston due to the wear of the clutch disc, thereby reducing the overall size of the release cylinder. It is possible to reduce, and to minimize the stepping force and the stroke stroke variation of the clutch pedal has the advantage that can improve the operating feeling and convenience of the driver.

Claims (5)

A cylinder body in which hydraulic pressure acts according to the operation of the clutch pedal; A piston linearly moved according to the hydraulic pressure in the cylinder body; A compensable push rod configured to transfer the action force to the release fork while moving by the piston, and to compensate the movement amount due to clutch disc wear in the middle portion; The compensable push rod includes an inner push rod connected to the piston, an outer push rod for transmitting an action force to the release fork having a cylindrical portion into which the inner push rod is inserted, and an inner push rod in the cylindrical portion of the outer push rod. A compensation means coupled to the push rod and wedge action to compensate for the movement amount due to the clutch disc wear; The compensation means includes a wedge portion provided at an end of the inner push rod, a correction plate positioned to correspond to the wedge portion in the outer push rod, a correction spring for providing elastic force to the correction plate, and a front of the correction plate. A clutch release cylinder, characterized in that it comprises a wedge engaging means positioned in the wedge portion is coupled or separated, and the stopper means for limiting the amount of movement when the outer push rod is returned to its original position. delete delete The method of claim 1, The wedge engaging means includes a correction ball arranged in the circumferential direction in front of the correction plate; Clutch release cylinder, characterized in that consisting of a cylindrical stopper rod to prevent the correction ball is separated from the wedge portion. The method of claim 4, wherein The stopper means is a clutch release cylinder, characterized in that consisting of a stopper protruding in the circumferential direction from the end of the stopper rod, and a stopper provided on the cylinder body to limit the movement of the stopper rod.

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