KR980009992A - Coupling structure of relief fork and push rod of automotive clutch - Google Patents

Abstract

In order to prevent the release of the push rod in the connection portion between the push rod subjected to the forward and backward movement of the piston of the release cylinder and the relief fork which moves the release bearing in response to the operation of the push rod,

The end of the push rod has a convexly protruding head portion having a large circumference, a groove into which the head portion is inserted is formed at one side of the relief fork, a ring groove is formed in the inner circumferential direction of the groove, Wherein the retaining fork of the clutch for a vehicle and the push rod are engaged with each other to prevent detachment of the push rod.

Description

Coupling structure of relief fork and push rod of automotive clutch

FIG. 1 is a sectional view showing a state in which a clutch release fork according to the present invention is connected to a push rod of a release cylinder; FIG.

FIG. 2 is an enlarged cross-sectional view of a portion A of FIG. 1 for explaining a clutch release fork engagement state according to the present invention in detail; FIG.

FIG. 3 is an enlarged cross-sectional view of a portion A of FIG. 1 showing the engaged state of the clutch release fork according to the prior art;

[Industrial Applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling structure of a push rod and a relief fork of a relief cylinder of an automotive clutch. More specifically, the present invention relates to a coupling structure of a relief fork, To a coupling structure of a relief fork that prevents the push rod from being released during operation.

[0003]

Generally, an automotive clutch controls the power of an engine transmitted to a drive wheel as needed, and temporarily stops the power of the engine at the start of the engine or at the time of shifting of the transmission gear. Such a clutch may be a mechanical type using a rod or a wire and a hydraulic type using hydraulic pressure according to an operation force transmission method.

The hydraulic clutch includes a master cylinder that generates hydraulic pressure when the pedal is depressed, and all relief cylinders that receive the hydraulic pressure to operate the relief fork.

In the above-mentioned release cylinder, the cylinder receiving the hydraulic pressure of the master cylinder pushes the push rod connected thereto, and the push rod pushes the release fork again.

FIG. 3 is a partial cross-sectional view showing the structure of a push rod 102 and a releasing fork 104 connecting portion used at present.

The push rod 102 is a member for connecting the piston (not shown) of the relief cylinder and the relief fork 104. One end connected to the relief fork 104 has a round end have.

The releasing fork 104 is a member serving as a lever for transmitting the action of the push rod 102 to the relief bearing. The connection part to the push rod 102 includes a groove 106 into which the push rod 102 can be inserted, Respectively.

The push rod 102 is inserted into the lower end groove 106 of the relief fork 104 to transmit a force. The connection portion is formed by connecting a return spring, which is built in the release silyler, 102 by a resilient force.

[Problems to be solved by the present invention]

However, when the clutch pedal is operated suddenly, the push rod of the release cylinder is disengaged from the groove of the relief fork so that the on-off operation of the clutch can not be performed.

[MEANS FOR SOLVING THE PROBLEM]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a retaining fork which is provided with a snap ring in a connection groove of the release fork, a protrusion formed at an end of the push rod, And to provide a coupling structure that can prevent the push rod from being detached even in an excessive operation of the clutch.

In order to realize the object of the present invention as described above, in the connecting portion between the push rod subjected to the advancing and retreating operation of the piston of the relief cylinder and the relief fork that moves the relief bearing in response to the operation of the push rod, The end of the rod is formed with a convexly protruding head having a large circumference. A groove into which the head is inserted is formed at one side of the relief fork. A ring groove is formed in the inner circumferential direction of the groove. Wherein the retaining fork and the push rod of the vehicle clutch are provided with a snap ring which is once opened to prevent the push rod from being inserted.

[Action]

Such a coupling structure pushes the head of the push rod into the snap ring mounted on the release fork, and then the snap ring is hooked to the neck of the push rod so that the push rod does not retract, so that the push rod is disassembled with the release fork Do not.

[Example]

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

1 is a sectional view showing a state of engagement between a release fork 2 and a push rod 4 according to the present invention in which the push rod 4 is connected between a release cylinder 6 and a release fork 2 have.

The release cylinder 6 functions to push the release fork 2 by the hydraulic pressure pumped from a master cylinder (not shown). A push rod 4 is inserted into the release cylinder body 10, A return spring 12 for contacting the relief fork 2 and a piston 8 for pushing the push rod 4 by hydraulic pressure and a push rod 4 connected to the piston 8 are built in have.

The push rod 4 is connected between the piston 8 and the relief fork 2 and pushes the relief fork 2 by the piston 8.

The release fork 2 receives the pushing force of the push rod 4 and transmits the pushing force to the release bearing 14. The releasing fork 2 is connected to the push rod 4 at one end, The other end of which is in contact with the relief bearing 14. The hinge portion 16 is formed at the other end.

FIG. 2 is an enlarged sectional view of part A of FIG. 1, showing the connection structure of the release fork 2 and the push rod 4 in more detail.

The push rod 4 is formed with a head 18 having a protruding portion connected to the relief fork 2 at an end.

A groove 20 into which the push rod 2 can be inserted is formed in the release fork 2 and a groove 24 is formed in the inner circumference of the groove 20 for fitting the snap ring 22. [ Respectively.

The snap ring 22 is provided in order to prevent the push rod 4 inserted into the round elastic ring with one end from being pulled out.

When the head portion 18 of the push rod 4 is inserted into the groove 20 of the release fork 2 at the connection portion of the push rod 4 and the release fork 2 thus constructed, The snap ring 22 is hooked on the neck of the head 18 to prevent the push rod 4 from being pulled out.

[effect]

INDUSTRIAL APPLICABILITY As described above, since the coupling structure of the present invention provides the engagement means at the contact portion of the release fork and the push rod, even if the clutch operation is abrupt, these components are not separated.

Claims (1)

The push rod has a push rod which is moved forward and backward of the release cylinder piston and a release fork which moves the release bearing in response to the movement of the push rod. The end of the push rod is convexly protruded Wherein a groove into which the head is inserted is formed on one side of the relief fork, a ring groove is formed in the inner circumferential direction of the groove, and a snap ring having one end opened in the ring groove is inserted And a push rod coupling structure of the release fork of the vehicle clutch. ※ Note: It is disclosed by the contents of the first application.