JPH0247771Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clutch disk wear warning device that notifies the wear limit of a clutch disk.

[Prior Art] As a conventional clutch disk wear warning device, for example, a device as described in Japanese Utility Model Publication No. 17939/1983 is known.

This conventional device is equipped with a fixed electrode at the rear end of the clutch release cylinder, and when the fixed electrode comes into contact with the release piston, which moves as the clutch disc wears, a lamp is lit to notify wear of the clutch disc. It was something like that.

However, this conventional device has the following problems.

(1) Since it is installed on a release cylinder that is fixed in advance, variations in the initial set position of the with draw lever directly result in variations in the movement of the release piston, and the amount of disc wear at the time of alarm is not constant and may be inaccurate. It was hot.

(2) Taking the above-mentioned variations into account, it is necessary to issue a wear warning early, and even clutch discs that can still be used may need to be replaced.

(3) During an overstroke that exceeds the wear stroke, the fixed electrode and release piston are in contact with each other, so it is not possible to take a further stroke margin.

[Purpose of the invention] The present invention was made to solve the above-mentioned problems, and it is possible to accurately sense the wear limit of the clutch disc, and also to detect whether the clutch disc exceeds the wear limit. To provide a clutch disk wear warning device which can provide a margin for replacement even if the clutch disk wear exceeds the limit, and which can be installed independently regardless of a clutch release cylinder.

[Structure of the invention] That is, in order to achieve the above-mentioned object, the present invention has a switch rod disposed on a withro lever that moves as the clutch disc wears, and the switch rod is located at a position before the wear limit of the clutch disc. An alarm switch that is turned on by contact between the switch terminal and a conductive member, and a switch rod of the alarm switch that can be adjusted forward and backward with respect to the with-drawing lever during initial setting. a position adjustment mechanism for fixing the switch rod at a contact position; a first stopper and a second stopper spaced apart from each other at the rear of the switch rod; a conductive member loosely inserted so as to be movable toward the distal end of the switch rod; and the conductive member. and the first stopper, a second spring interposed between the second stopper and the switch cover, and a second spring protruding into the cover from the rear end side of the switch cover. The present invention is characterized in that it comprises a switch terminal provided therein, and an alarm means connected to the switch terminal and energized by the power source when the alarm switch is turned on to issue an alarm.

[Effects of the Invention] Therefore, with the clutch disk wear warning device of the present invention, the following effects can be obtained.

Since the alarm switch is configured so that the initial setting of the alarm switch can be performed by the position adjustment mechanism, the wear limit of the clutch disk can be accurately known by the alarm means.

As a result, it is possible to use the clutch disk without wasting it until it reaches its wear limit, and it also prevents the clutch from breaking when the wear limit is exceeded, and from slipping and damage to the friction partner member due to exposure of the clutch facing fixing rivet. It can prevent damage from occurring.

The conductive member loosely inserted into the switch rod is integrated with the switch rod until it contacts the switch terminal, and after that, the conductive member remains in contact with the switch terminal and a spring is provided that allows only the switch rod to overstroke.
Even if the clutch disc exceeds its wear limit, it is tolerated by overstroke of the switch rod only.

As a result, the clutch disk can be replaced as soon as possible at a convenient time, allowing more time for replacement.

Since the existing with-draw lever in the clutch device is used as the wear-following member and the device is configured with an alarm switch provided only on the fixed member side, the device can be provided independently regardless of the clutch release cylinder.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
In describing this embodiment, a clutch disk wear warning system for a hydraulically operated clutch for an automobile will be taken as an example.

First, the configuration of the embodiment shown in FIGS. 1 and 2 will be explained.

Reference numeral 1 denotes a with-drawing lever as a wear-following member, which moves in the direction of arrow A as the clutch facing 2a of the clutch disk 2 wears. One end is brought into contact with the bearing sleeve 4, and the other end is provided with a clutch release cylinder 5, which will be described later.A push rod 51 of the clutch release cylinder 5 is moved forward and backward by hydraulic pressure to disconnect and disconnect the clutch. It is a lever that does this.

Reference numeral 6 denotes an alarm switch, which is disposed relative to the with draw lever 1 and is configured to turn on before the wear limit of the clutch facing 2a is reached. A switch rod 61 of the alarm switch 6 is disposed near the connecting portion 5a with the tip of the switch rod 61 in contact with the withdrawal lever 1. As shown in FIG. 2, this alarm switch 6 consists of a first switch cover 62 and a second switch cover 63, which are screwed together so that the wear limit stroke S can be adjusted, and one of the first switch covers. A switch rod 61 serving as a movement sensing member is inserted through the opening 62a of the switch rod 62 and has its tip abutted against the with-draw lever 1, and a first stopper 64 and a second stopper 65 are integrally formed at the rear of the switch rod 61. a conductive member 66 disposed at the second stopper 65 and movably loosely inserted in the distal end direction of the switch rod 61; and a conductive member 66 interposed between the conductive member 66 and the first stopper 64. 1 spring 67 and a second switch interposed between the second stopper 65 and the second switch cover 63.
Spring 68 and the second switch cover 63
It is configured to include two switch terminals 69, 69 protruding into the cover from the rear end side.
The alarm switch 6 is installed by screwing and fixing the alarm switch 6 to a mounting bracket 7, and fixing the mounting bracket 7 to the clutch housing 8 with a lock bolt 9. 9 is the flange part 5
2 also serves to fix the clutch release cylinder 5.

Reference numeral 10 denotes a position adjustment mechanism, which is provided to bring the tip of the switch rod 61 of the alarm switch 6 into contact with the with-draw lever 1 during initial setting. The threaded portion 62b and the threaded portion 6
2b, and a lock nut 11 that is fixed at the threaded adjustment position of both threaded parts 62b and 7a.

Reference numeral 12 denotes a lamp as an alarm means, which is connected to the switch terminals 69, 69 of the alarm switch 6 via a battery 13 with wires 14, 15, 16. When the clutch facing 2a reaches the wear limit, the lamp 12 lights up and the clutch facing 2a
This is to notify you when it is time to replace the

Reference numeral 5 designates a clutch release cylinder 5, which, as shown in FIG. 2, includes a push rod 51 connected to the with-draw lever 1, and a release piston 52 provided at the rear end of the push rod 51.
A release cylinder 53 that allows the release piston 52 to move forward and backward, a spring 54 that is interposed between the release cylinder 53 and the release piston 52, and a pressure hole that is opened in the rear end of the release cylinder 53. An oil inflow hole 55, an air bleeder hole 56 formed in the release cylinder 53, and an opening 53 of the release cylinder 53.
a, and a dust cover 57 for closing a, and pressurized oil flows from the master cylinder (not shown) into the cylinder chamber 58 through the pressure oil hose 17 and the pressure oil inflow hole 55 by operating the clutch. The push rod 51 pushes the withdrawal lever 1 via the release piston 52, and the clutch is disengaged.

In addition, what is indicated by 18 in the figure is the clutch shaft,
19 is the crankshaft, 20 is the transmission shaft, 21 is the release bearing, 22
is the flywheel, 23 is the pressure plate,
24 is a retainer plate, 25 is a diaphragm spring, 26 is a thrust ring, 27 is a clutch cover, and 28 is a flywheel housing.

Next, the action will be explained.

First, the wear limit stroke S is adjusted and the alarm switch 6 is set so that it is turned on at a predetermined stroke.

Then, the alarm switch 6 is screwed onto the mounting bracket 7, and the tip of the switch rod 61 of the alarm switch 6 is adjusted so that it is in contact with the with-draw lever 1, as shown by the solid line in FIG. When finished, fix the position with the lock nut 11 and perform the initial setting.

Thereafter, as the clutch facing 2a of the clutch disk 2 gradually wears down as the clutch is used, the with draw lever 1 gradually moves in the direction of arrow A and pushes the switch rod 61. .

When the switch rod 61 is pushed to the wear limit stroke S, which corresponds to just before the wear limit of the clutch facing 2a, the conductive member 66 comes into contact with the switch terminals 69, 69, as shown in the virtual diagram in FIG. As a result, the lamp 12 lights up, giving a warning that the wear limit is near.

If the clutch disk 2 cannot be replaced immediately after the alarm is displayed, the conductive member 66 remains in contact with the switch terminals 69, 69, and only the switch rod 61 can move against the second spring 68. Therefore, there is no problem even if the clutch disk 2 becomes overstroked, and the clutch disk 2 can be replaced as soon as possible at a convenient time.

Therefore, as described above, since the clutch disk wear warning device of the embodiment allows the initial setting of the warning switch 6, the wear limit of the clutch disk 2 can be accurately known from the lamp 12.

In addition, by being able to accurately know the wear limit of the clutch disc 2, it is possible to use the clutch disc 2 without waste until it reaches the wear limit, and furthermore, it is possible to prevent problems such as clutch breakage that occur when the wear limit is exceeded. It can be prevented.

Further, in the embodiment, a margin can be provided even during overstroke, and furthermore, a device can be provided independently of the clutch release cylinder 5 of the non-adjustable type.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, although a hydraulically operated clutch has been described in the embodiment, the device of the present invention can also be applied to a mechanically operated clutch using a wire or the like.

Furthermore, the position adjustment mechanism is not limited to the mechanism in the embodiment, but other mechanisms may be used, such as a mechanism in which a long hole is drilled in the mounting bracket and the fixed position can be changed within the range of the long hole. You can.

In addition, although a lamp is shown as the warning means, it may also be a display of characters or other visual warning means, an audible warning means such as a buzzer, or even a combination of visual and auditory warning means. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a clutch equipped with a clutch disk wear warning device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing essential parts of the device according to the embodiment. 1... With drawer lever, 2... Clutch disc, 3... Alarm switch, 10... Position adjustment mechanism,
12... Lamp (alarm means), 13... Battery (power supply), 61... Switch rod, 66... Conductive member,
67...first spring, 68...second spring,
69...Switch terminal.

Claims (1)

[Scope of Claim for Utility Model Registration] It has a switch rod disposed on a with-low lever that moves as the clutch disc wears, and when the switch terminal comes into contact with a conductive member at a position before the wear limit of the clutch disc. an alarm switch that is turned on; a position adjustment mechanism that is provided on the switch rod portion of the alarm switch and that can be adjusted forward and backward relative to the with-drawing lever when initially set and is fixed at a position in contact with the with-drawing lever; a first stopper and a second stopper provided at a distance from each other at the rear of the switch rod; a conductive member loosely inserted so as to be movable toward the distal end of the switch rod; and interposed between the conductive member and the first stopper. a second spring interposed between the second stopper and the switch cover; a switch terminal protruding into the cover from the rear end side of the switch cover; 1. A clutch disk wear alarm device comprising: an alarm means that is connected to the alarm switch and is energized by a power source when an alarm switch is turned on to issue an alarm.