JPH0447451Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a clutch facing wear indicating device for indicating the wear state of a clutch facing.

[Conventional technology]

Generally, in order to know the wear limit of the clutch facing, a clutch booster without an adjustment mechanism for the wear of the clutch facing is constructed as shown in FIG. 3, for example. With this clutch booster, adjustment when the clutch facing wears out can be done by loosening the nut 32 and shortening the effective length of the threaded portion of the push rod 31, eliminating the need for adjustment of the adjustment screw. The structure is such that the wear limit of the clutch facing can be determined by the wear of the clutch facing.

Various clutch boosters have also been disclosed that are equipped with an adjustment mechanism for wear of the clutch facing.

By the way, various structures of clutch facing wear indicating devices for indicating the wear limit of the clutch facing have been disclosed. For example, there are those described in Japanese Utility Model Application Publication No. 58-31434 and Japanese Utility Model Application Publication No. 57-174824.

Referring to FIG. 4, the clutch facing wear indicating device described in the above-mentioned Japanese Utility Model Publication No. 58-31434 will be outlined. When the amount of movement of the release bearing due to wear of the clutch facing reaches a predetermined amount, the member 45 that interlocks with the release bearing moves rearward (to the left in the figure), and the switch operating arm 44 moves to the left in the figure. Move and switch 43
Close the contacts. Since the contact of the switch 43 is set at the wear limit position of the clutch facing, when the contact closes and the circuit 42 becomes conductive, the indicator light 41 lights up and the driver knows the wear limit state of the clutch facing. be able to. In the figure,
Reference numeral 46 indicates an operating arm.

Next, referring to FIG.
The clutch facing wear detection device described in Japanese Patent No. 174824 will be summarized. flywheel 5
1 rotatably supports an intermediate portion 54 of a wear indicating lever 53. One end 59 of the wear instruction lever 53 comes into contact with the operating portion 58 of the pressure plate 52,
A scale 56 is provided on the outer periphery of the flywheel 51 in order to measure the amount of movement, that is, the amount of operation of the other end 55 of the wear indicating lever 53.

[Problem that the invention attempts to solve]

However, the clutch booster shown in Fig. 3, which is not equipped with an adjustment mechanism for clutch facing wear, is constructed so that the wear limit of the clutch facing can be known by eliminating the adjustment allowance for the adjustment screw. However, it often relies on the feel of the adjuster, which poses a problem in accurately determining the wear limit.

Additionally, with regard to non-adjustable clutch boosters, that is, clutch boosters with an automatic adjustment mechanism, the driver cannot check the wear limit of the clutch facing from the outside because the clutch booster automatically adjusts according to the amount of wear on the clutch facing. There are problems.

Furthermore, when assembling a clutch booster with an automatic play adjustment mechanism, it is necessary to first measure the length of the automatic play adjustment mechanism device and adjust it to a predetermined length. However, if there are many types of structures, it is necessary to memorize the numerical values or measure them each time, which is extremely inconvenient.

The clutch facing wear indicating device shown in Figure 4 uses an electric circuit, and considering that the wear limit will be reached after long-term use, maintenance is required because it uses electrical means. , structural problems, etc. are not necessarily satisfactory.

Although the clutch facing wear detection device shown in FIG. 5 can easily detect wear, the detection position, the mounting position of the scale, etc. are different from the purpose of this invention.

The purpose of this invention is to solve the above problems.The wear limit of the clutch facing can be detected very easily from the outside, and there is no need to measure the amount of wear each time. It is an object of the present invention to provide a clutch facing wear indicating device that is structurally and practical.

[Means for solving problems]

In order to achieve the above object, this invention is constructed as follows. That is, this invention includes a push rod that reciprocates with respect to the cylinder of a clutch booster, a wear indicating member having an indicator ring surrounding the cylinder at one end and a mounting band for attaching to the push rod at the other end, and A clutch facing wear indicating device comprising: a wear indicating mark provided on the outer surface of the cylinder to indicate an initial setting position where the indicating wheel is aligned to set the indicating member and a wear limit position of the clutch facing. Regarding.

Further, in this clutch facing wear indicating device, a hole is formed in the wear indicating member, the hole is set to correspond to the end face of the stopper of the clutch booster, and the wear indicating member is fixed to the push rod. be.

[Effect]

The clutch facing wear indicating device according to this invention is constructed as described above and operates as follows. That is, a wear indicator is attached to the push rod, and a wear indicator is provided on the clutch booster to indicate the initial setting position and wear limit position of the clutch facing. In particular, the wear indicator is engraved on the outer surface of the cylinder of the clutch booster. Since the wear indicating member is provided with a ring surrounding the cylinder and the wear indicating member and the wear indicating mark are aligned, the wear limit of the clutch facing is extremely easy to see from the outside.

Further, since a hole is formed in the wear indicating member, and the hole corresponds to the end face of the stopper in the clutch booster, there is no need to measure the length of the play adjustment mechanism.

〔Example〕

Hereinafter, one embodiment of the clutch facing wear indicating device according to this invention will be described in detail with reference to the drawings.

In FIG. 1, a clutch facing wear indicating device according to the present invention is indicated generally by the numeral 15. The clutch facing wear indicating device 15 is installed in a portion of the cylinder 12 in which the hydraulic piston 17 of the clutch booster 16 slides and a push rod that reciprocates with respect to the cylinder 12.
The push rod mainly consists of a push rod body 2, an inner lock 13, a spring, a ball,
It consists of an outer lock 18 and a stopper 11.

One end of the inner lock 13 abuts against the piston 17, and the other end of the inner lock 13 fits inside the push rod body 2 and abuts through a spring. The inner lock 13 and the outer lock 18 are configured to be fixed or released relative to each other via a ball. A stopper 11 is fitted on the outer periphery of the outer lock 18.
The end of the stopper 11 abuts against the end of the cylinder 12 to restrict leftward movement of the outer lock 18 and therefore the push rod.

A rubber boot 3 is attached to the connecting portion between the cylinder 12 and the push rod so as to cover the outer periphery. The other end of the push rod body 2 is fitted into a clevis 9, and a nut 8 restricts relative movement between the push rod body 2 and the clevis 9. Return spring 6 is clevis 9
is pressed in the direction of the push rod body 2, which functions to return the lever 7 to its original position.

The clutch facing wear indicating device 15 according to this invention has a wear indicating member 1, which has a mounting band 5 at one end and an indicating wheel 1 at the other end.
This is a wear indicator plate having a value of 0. Further, a hole 4 as a viewing window is formed in the wear indicating member 1. The wear indicating member 1 is fastened and fixed to the push rod main body 2 by a mounting band 5.

In this case, the wear indicating member 1 is set parallel to the push rod, and the hole 4 of the wear indicating member 1 is set at a position corresponding to the stopper 11. The indicator wheel 10 of the wear indicator 1 is set to be located on the cylinder 12. An initial setting position 20 and a wear limit position 19 are engraved on the cylinder 12 of the clutch booster 16. The distance between the initial setting position 20 and the wear limit position 19 is designated by l.

As described above, the clutch facing wear indicating device 15 according to this invention is constructed, and the wear indicating member 1 is connected to the clutch booster 1 in the following manner.
6 and the clutch facing wear indicator is functional. The wear indicator 1 is fixed to the push rod body 2 by the mounting band 5 so that the indicator ring 10 of the wear indicator 1 is positioned at an initial setting position 20 stamped on the cylinder 12.

When the clutch facing wears out, the lever 7 rotates counterclockwise and the push rod moves to the left (FIG. 1). Wear indicator member 1
Since it is attached to the push rod main body 2, it similarly moves to the left together with the push rod. The wear indicating member 1 is moved simultaneously by the indicating wheel 10.
will be moved. When the indicator wheel 10 reaches the wear limit position 19, that is, when the indicator wheel 10 reaches the position 14, the wear limit is reached, and this can be clearly confirmed from the outside. Then, the clutch facing may be replaced.

In addition, regarding the adjustment of the length of the play adjustment mechanism,
In particular, the description will be made with reference to FIG. 2, which is a view taken from the arrow in FIG. The push rod body 2 and the clevis 9 are set so that the end face of the stopper 11 is aligned with the edge of the hole 4 of the wear indicating member 1 while being restricted by the nut 8. For example, the distance between the pivot point 21 of the lever 7 of the clevis 9 and the end surface 22 of the stopper 11 is set to a predetermined distance L. If this is determined, there will be no need to measure dimensions at all.

[Effect of idea]

The clutch facing wear indicating device according to this invention is constructed as described above, and has the following effects. That is, a wear indicator is attached to the push rod, a wear indicator is provided on the clutch booster, especially the cylinder part that is easily visible from the outside, to indicate the initial setting position and the wear limit position of the clutch facing, and the wear indicator and the wear indicator are provided on the clutch booster, especially on the cylinder part that is easily visible from the outside. Since the wear limit marks on the clutch facing are made to coincide with each other, it is extremely easy to see from the outside.

Further, the wear indicating member is provided with a ring surrounding the cylinder, and the ring allows easy confirmation.

Furthermore, since a hole is formed in the wear indicating member and the hole corresponds to the end surface of the stopper in the clutch booster, there is no need to measure the length of the play adjustment mechanism. It's extremely simple.

Moreover, the clutch facing wear indicating device according to this invention has a simple structure and is extremely practical.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the clutch facing wear indicating device according to this invention, Fig. 2 is a plan view of the main part as seen from the arrow in Fig. 1, and Fig. 3 is a diagram showing a conventional clutch booster. FIG. 4 is a schematic diagram showing a conventional clutch facing wear indicating device, and FIG. 5 is a schematic diagram showing a conventional clutch facing wear indicating device. 1... Wear indicator member, 2... Push rod body, 3... Rubber boot, 4... Hole, 5... Mounting band, 6... Return spring, 8... Nut, 10... Indicator wheel, 11... Stoppa, 12...
...Cylinder, 15...Clutch facing wear indicator, 16...Clutch booster, 19...
Wear limit position, 20... Initial setting position, 21...
Pivot point, 22... End face of the stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A wear indicator comprising a push rod that reciprocates with respect to the cylinder of the clutch booster, an indicator ring surrounding the cylinder at one end, and a mounting band for attaching to the push rod at the other end. and a wear indicator mark provided on the outer surface of the cylinder to indicate an initial setting position in which the indicator wheel is brought into alignment to set the wear indicator member and a wear limit position of the clutch facing. Facing wear indicator. (2) A utility model characterized in that a hole is formed in the wear indicating member, the hole is set to correspond to an end surface of a stopper of the push rod in the clutch booster, and the wear indicating member is fixed to the push rod. A clutch facing wear indicating device according to claim 1.