JP2001012504A - Release device for automotive clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve maintainability of a clutch pedal for adjusting a margin rate of the clutch pedal. SOLUTION: The piston 55 of a release cylinder 54 is moved by operating a clutch pedal 51. The movement of the piston 55 is transmitted to a release lever 43 through a connection member. A clutch 10 can be disconnected by the oscillation of the release lever 43. In such a release device 40 for the clutch 10 of an automobile, a connection member 60 outside the release cylinder 54 is plurally divided, while a spring 63 is arranged between divided bodies 61 and 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clutch release device for an automobile.

[0002]

2. Description of the Related Art Conventionally, as a clutch for an automobile, a piston of a release cylinder is moved by depressing a clutch pedal, the movement of the piston is transmitted to a release lever by a connecting member, and the clutch can be disengaged by swinging the release lever. There is something that becomes.

In the prior art, a piston of a release cylinder is divided into two parts, and a coil spring is interposed between the two divided pistons in order to secure a play amount of a stepping operation of a clutch pedal. Kaihei 8-61392
No.).

[0004]

However, the prior art has the following problems. The play amount of the clutch pedal can be adjusted by changing the spring constant and the like of the coil spring. However, since the coil spring is interposed between the two pistons in the release cylinder, different coil springs with different spring constants and the like can be used. In order to replace the release cylinder, it is necessary to disassemble and maintain the release cylinder and its hydraulic system, resulting in poor maintainability.

[0005] The play operation time (the time from the start of the depression of the clutch pedal to the end of the play amount), which is the operation feeling of the clutch pedal, can be adjusted by changing the spring constant of the coil spring or the like. In order to increase the spring constant, the wire diameter of the coil spring is large, and the coil diameter is large, making it difficult to incorporate the coil into the release cylinder.

An object of the present invention is to improve maintainability for adjusting the play amount of a clutch pedal.

Another object of the present invention is to make it possible to easily adjust the idle operation time of the clutch pedal while making the operation system of the clutch compact.

[0008]

According to the first aspect of the present invention, a piston of a release cylinder is moved by depressing a clutch pedal, and the movement of the piston is transmitted to a release lever by a connecting member. In a release device for an automobile clutch, which can disengage a clutch by swinging, the connecting member is divided into a plurality of parts, and a spring is interposed between the divided members.

According to a second aspect of the present invention, in the first aspect of the present invention, the spring is a disc spring.

[0010]

According to the first aspect of the present invention, the following operations are provided. The amount of play of the clutch pedal is made by changing the spring constant of the spring, etc., but the spring is interposed between the divided members of the connecting member, and without disassembling and maintaining the release cylinder and its hydraulic system, the spring constant, etc. Can be replaced with a different one, improving the maintainability.

According to the second aspect of the present invention, the following operations are provided. By using a disc spring as the above-mentioned spring, the spring constant can be adjusted by changing the combination of disc springs of the same diameter, and the same space (diameter x length)
Then, a spring constant larger than that of the coil spring can be formed by the disc spring. Therefore, the spring constant of the spring formed of the disc spring is increased while the operation system of the clutch is made compact, and the idle operation time of the clutch pedal can be easily increased.

[0012]

FIG. 1 is a schematic view showing a clutch for an automobile, and FIG. 2 is a schematic view showing a connecting member and a spring.

As shown in FIG. 1, an automotive multi-plate clutch 10 transmits the rotational force of an engine to an input shaft 12 of a transmission, and is provided between a flywheel 11 and an input shaft 12 connected to the engine. Interposed.

A clutch cover 14 is fixed to columns 13 at a plurality of positions on the outer peripheral portion of the flywheel 11 at equal circumferential intervals. That is, the flywheel 11 and the support 1
The clutch cover 3 and the clutch cover 14 are fixed so as to be integrally rotatable by bolts 15. A diaphragm spring 17 for generating a pressurizing force on the flywheel 11 side is attached to the clutch cover 14 by an attaching member 16, and a retainer 44 of a release device 40, which will be described later, is mounted on an inner peripheral end face 17 </ b> A of the diaphragm spring 17. Wheel 11
, A pivot ring 16A of the mounting member 16 contacts the outer peripheral end face 17B on the transmission side, and a pressure plate 21 described later contacts an intermediate portion near the outer periphery. As a result, the diaphragm spring 17 moves the pressure plate 21 to the flywheel 1.
1 can be pressurized.

Inside the clutch cover 14, there is provided a pressure plate 21 having a projection which comes into contact with the outer peripheral end face 17B of the diaphragm spring 17. The pressure plate 21 has recesses at a plurality of positions on the outer periphery in the circumferential direction,
This concave portion can be engaged with the column 13 movably in the axial direction of the column 13.

Inside the clutch cover 14, intermediate plates 22 and 23 are arranged on the flywheel 11 side from the pressure plate 21. Intermediate plate 22,
Like the pressure plate 21, the recess 23 is provided with a concave portion at a plurality of positions on the outer periphery in the circumferential direction, and the concave portion can be engaged with the support 13 so as to be movable in the axial direction of the support shaft 13.

The transmission input shaft 12 extends into the clutch cover 14 and the flywheel 11
The inner peripheral boss of the clutch hub 30 is spline-coupled to the input shaft 12 between the diaphragm spring 17 and the input shaft 12. The outer peripheral boss portion of the clutch hub 30 is provided with external teeth with which a plurality of clutch disks 31, 32, 33 described later are movably engaged in the axial direction.

Inside the clutch cover 14, between the pressure plate 21 and the intermediate plate 22, the intermediate plate 2
Between 2 and 23, intermediate plate 23 and flywheel 11
The clutch discs 31, 32, 3
3 are provided. Clutch discs 31, 32, 3
3 is spline-coupled to the external teeth of the clutch hub 30, and as a result, engages with the input shaft 12 so as to be movable in the axial direction and rotatable integrally with the input shaft 12. Clutch disc 31
(The same applies to 32 and 33).

However, the release device 40 includes a collar 41 coaxially covered with the input shaft 12 of the transmission.
To the cover of the transmission.
1, an outer race of a release bearing 42 is slidably coupled in the axial direction, and a release lever 43 is engaged with the outer race. The release bearing 42 has an inner race around the collar 41 with a gap therebetween, and the diaphragm spring 17 is connected to the inner race via a retainer 44.

When the clutch pedal 51 is depressed, the release device 40 causes the hydraulic pressure generated in the master cylinder 52 to flow through the line 53 to the release cylinder 54.
The piston 55 of the release cylinder 54 is moved, and the movement of the piston 55 is transmitted to the above-mentioned release lever 43 by the connecting member 60, and the release lever 43 is swung around the support shaft 43A. Therefore, when the release lever 43 swings by depressing the clutch pedal 51 and the release bearing 42 moves in a direction away from the flywheel 11, the diaphragm spring 17 is pulled toward the transmission via the retainer 44, and the diaphragm spring 17 Performs a clutch disengagement operation for releasing the pressing force applied to the pressure plate 21. On the other hand, when the depression of the clutch pedal 51 is released,
The pressing force of the diaphragm spring 17 performs a clutch connection operation for pressing the pressure plate 21 toward the flywheel 11.

In the inside of the release cylinder 54, a piston 55 is pressurized, and the piston 55 and the release lever 43 are pressed.
A preload spring 57 composed of a coil spring for holding the connecting member 60 is stored between the preload spring 57 and the preload spring 57. The preload spring 57 absorbs displacement of the release lever 43 and the like due to wear of the clutch discs 31 to 33 and positions the piston 55.

However, in the release device 40, the connecting member 60 is divided into first and second divided rods 61 and 62, and a spring 63 formed of a disc spring is interposed between the divided rods 61 and 62. ing. The spring constant of the spring 63 must be set larger than the spring constant of the preload spring 57.

At this time, the end portion 61 of the first split rod 61
A abuts the piston 55 in the release cylinder 54, and the end 62 A of the second split rod 62 abuts the release lever 43. End 61 of both split rods 61, 62
A and 62A have a spherical shape and come into contact with the piston 55 and the release lever 43, and the pressing force transmitted from the piston 55 to the release lever 43 is changed by the connecting member 60 (the split rod 6).
1, 62) on the central axis.

Further, the first split rod 61 is formed by cutting the spring receiving portion 61B, the rod receiving portion 61C,
A ring groove 61D for the round retaining ring 64 is provided. Second
The split rod 62 includes a flange 62B for supporting the spring 63 and a mounting portion 62C for the boot cover 65. A bush 66 is press-fitted into the rod receiving portion 61C of the first split rod 61, and a distal end portion 62 of the second split rod 62.
Let D be slidable. Ring groove 6 of first split rod 61
1D, a round retaining ring 64 is engaged, and the first split rod 6
The flange 62B of the second split rod 62 attached to the first split rod 62
With a retaining ring 64. The boot cover 65 includes a mounting portion 62 for the release cylinder 54 and the second divided rod 62.
C and dust-sealed for the sliding portion between the release cylinder 54 and the piston 55 and the assembly portion of the first split rod 61 and the second split rod 62,
The connecting member 60 (divided rods 61, 62) is held coaxially with the release cylinder 54.

The spring 63 has the first split rod 61 housed in the spring housing 61B and the spring housing 6B.
1B and the flange 62B of the second split rod 62. The spring 63 has a set of a plurality of disc springs, and has a spring constant twice as large as that of a single disc spring by contacting the concave and convex surfaces of the two disc springs. And by bringing the convex surfaces of the two disc springs into contact with each other (or with the concave surface and the concave surface),
A double bending stroke can be obtained with a spring constant that is not different from the spring constant of a single disc spring.

The operation of the connecting member 60 during the clutch disconnection operation using the release device 40 is as follows (FIG. 2).

(1) When the clutch pedal 51 is not depressed, the connecting member 60 is in the most extended state in FIG. 2A, and the clutch 10 is in the connected state.

(2) When the clutch pedal 51 is depressed to disconnect the clutch 10, the master cylinder 52
The hydraulic pressure generated by the piston 5 of the release cylinder 54
5. The first split rod 61 is moved to apply a pressing force to the spring 63. As a result, the spring 63 transmits the pressing force to the second divided rod 62 while flexing and deforming.

(3) When the clutch pedal 51 is further depressed, the connecting member 60 is in the most compressed state shown in FIG. 2B, and the end face of the rod receiving portion 61C of the first divided rod 61 is moved to the second divided rod. The pressing force is transmitted directly from the first split rod 61 to the second split rod 62 while abutting against the distal end 62D of the release lever 62, and the release lever 43 is swung as described above.

In the above steps (2) to (3), during the process from when the clutch pedal 51 is depressed until the release lever 43 moves and the release bearing 42 moves, the clutch pedal 51 is subjected to an amount corresponding to the bending of the spring 63. Of play.

When the spring constant of the diaphragm spring 17 is made equal to the spring constant of the spring 63 in the clutch 10 in consideration of the lever ratio of the release lever 43, the spring is depressed by depressing the clutch pedal 51. At the same time as the flexure 63 is deformed, the diaphragm spring 17 is also displaced toward the transmission, and as a result, the pedal stroke (movement distance) of the half clutch can be increased.

Therefore, according to the present embodiment, the following operations are provided. The play amount of the clutch pedal 51 is changed by changing the spring constant of the disc spring of the spring 63, the number of disc springs, and the like.
2, the release cylinder and its hydraulic system can be replaced with one having a different spring constant without disassembling and maintaining the release cylinder and its hydraulic system, thereby improving maintainability.

By using a disc spring as the above-mentioned spring 63, the spring 63 can adjust the spring constant and the like by changing the combination of the disc springs having the same diameter. A spring constant larger than a coil spring can be formed. Accordingly, while making the operation system of the clutch 10 compact, the spring constant of the spring 63 formed of a disc spring is increased, and the idle operation time of the clutch pedal can be easily increased.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, in the embodiment of the present invention, the release device moves the release bearing to the flywheel side by the release lever, thereby moving the diaphragm spring to the flywheel side, whereby the pressure applied by the diaphragm spring to the pressure plate is increased. May be configured as a push-type clutch that eliminates the problem.

[0035]

As described above, according to the present invention, the maintainability for adjusting the play amount of the clutch pedal can be improved.

Further, according to the present invention, it is possible to easily adjust the idle operation time of the clutch pedal while making the operation system of the clutch compact.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an automobile clutch.

FIG. 2 is a schematic view showing a connecting member and a spring.

[Explanation of symbols]

 Reference Signs List 10 multi-plate clutch 40 release device 43 release lever 51 clutch pedal 54 release cylinder 55 piston 60 connecting member 61, 62 split rod (split body) 63 spring

[Procedure amendment]

[Submission date] May 25, 2000 (2005.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

According to the first aspect of the present invention, a piston of a release cylinder is moved by depressing a clutch pedal, and the movement of the piston is transmitted to a release lever by a connecting member. A release device for a vehicle clutch, wherein the clutch can be disengaged by swinging, wherein the connecting member is divided into a plurality of parts, and a spring is interposed in a space between the divided bodies in which hydraulic oil is not stored. It is.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

According to the first aspect of the present invention, the following operations are provided. The amount of play of the clutch pedal is made by changing the spring constant and the like of the spring, but the spring is interposed in a space in which hydraulic oil is not accommodated between the divided bodies of the connecting member,
The release cylinder and its hydraulic system can be replaced with those having different spring constants without disassembling and maintaining the cylinder, thereby improving maintainability. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 29, 2000 (2009.2)
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

According to the first aspect of the present invention, a piston of a release cylinder is moved by a depression operation of a clutch pedal, and the movement of the piston is transmitted to a release lever by a connecting member. in the release of a motor vehicle clutch comprising a cleavable clutch by swinging, the coupling member Lely
Release cylinder without being housed in a
Parts that can be linked to the piston inside the cylinder
And a spring is interposed in a space between the divided bodies in which hydraulic oil is not stored.

Claims (2)

[Claims] A release of a clutch for an automobile in which a piston of a release cylinder is moved by a depression operation of a clutch pedal, the movement of the piston is transmitted to a release lever by a connecting member, and the clutch can be disengaged by swinging of the release lever. The release device for a vehicle clutch, wherein the connecting member is divided into a plurality of parts, and a spring is interposed between the divided members. 2. The spring according to claim 1, wherein said spring is a disc spring.
A release device for an automotive clutch as described in the above.