JPS5947537A - Clearance adjusting device - Google Patents

Abstract

PURPOSE:To aim at simplification in a device structure, by using this device for a cam brake or the like to be attached to vehicles, while rotating a clearance adjusting worm wheel in a way of interlocking a body being overrotated when a brake clearance goes beyond the setting value, via a link member. CONSTITUTION:When the whole body of a device 1 is rotated clockwise with the center of a worm wheel 6 as an axis by an actuator via a push rod 23, if the clearance between a friction member and a rotor (unillustrated herein either) is larger than the setting value in case of a cam brake producing braking force, rotation of a body 5 toward a clockwise direction takes place so excessively in time of braking. If so, after engagement between a leg part 13 and a claw 11 comes off through link members 17 and 14, the next claw 11 and the leg part 13 are linked together. And, when braking is suspended, a star wheel is rotated via the engagement between the leg part 13 and the claw 11 in time of turning return to the original position of the body 5, thus a brake clearance is adjusted via a worm 7 and the worm wheel 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gap adjusting device I/y for a cam brake installed in a vehicle.

Conventionally, as this divine thing, a worm wheel that can rotate integrally with the camshaft of a cam brake, a worm shaft that has a worm anastomosed with the worm shaft, and a rotation +1 rotation of the worm wheel and the worm shaft. A main body that supports lIr1J function, and a main body that is provided on one part of the main body, and one that is pivoted on the first vagina and is pressed by fluid pressure.
+1i11 work! It is known that the brake is equipped with a connector that communicates with the pusher and rod of the HJI device, and that the gap between the friction phase of the cam brake and the rotary body is adjusted to 17 by the rotation of the worm shaft.

However, in the conventional equipment, when the gap between the rotary material and the rotary body develops, in order to automatically reduce the gap, the main body is rotated against the vehicle body (by rotating the worm shaft at the same time). 7 force, and for this reason, as a means to rotate the worm shaft,
A complex rotating device (iQυ) is attached to the worm shaft, and a base block for operating this rotating device (P) is also attached to the vehicle body, which makes the device extremely large and makes it difficult to There are problems in that the installation work is complicated and the installation structure is complex.

The present invention has been made in consideration of the above-mentioned problems, and aims to provide a gap adjustment device that has a simple structure and is easy to attach to a vehicle body. The star wheel is provided on a protrusion to the outside of the main body, and has a large number of claws formed on the outer periphery, and has legs that can be locked in one direction with the claws of the star wheel, and rotates in the tangential direction of the outer periphery of the star wheel. ME 1 link member movably supported on the main body and + Bd f
;A1 The second link member is provided between the link member and the connecting tool, and has a second link member that interlocks the two members with a play of a predetermined gap.

Therefore, in response to excessive rotation of the main body, the link structure consisting of the first and second link members, the main body, and the suction
By rotating the first link member and thereby rotating the worm shaft, the gap is automatically reduced to within a predetermined range.
Not only can inspection be performed, but there is no need to install any device on a special part of the vehicle body, and the installation of the entire device requires only rt8 work and structure.

Hereinafter, the 16-jump circumference adjusting device of the present invention will be explained in detail based on the illustrated examples.

Fig. 1.2 is a diagram showing a gap adjustment device which is an embodiment of the present invention, Fig. 1 is a front view partially shown in cross section, and Fig. 2 is a left side view partially shown in cross section. In one figure, the gap adjusting device is designated as a whole by 1, and the device 1 has a large circular hole 2 and an increasing diameter portion 3 communicating with the upper part of the hole 2. It has a main body 5 provided with a hole 4.

A worm wheel 6 that is connected to a camshaft of a cam brake (not shown) through serrations is rotatably inserted into the hole 2, and a worm 7 that is anastomosed with the worm wheel 6 is integrally inserted into the hole 4. Worm shaft with 8
is rotatably inserted, and the hole 2 and the increased diameter portion 8 are tightly covered by a cover member 9 welded to the main body 5, and the cover member 9 is provided with a hole 10 through which the camshaft passes. be.

In addition, a lubricant 41 such as grease is sealed in the hole 2.4 in the remaining space after each member is inserted.

The left end of the worm shaft 8 protrudes to the outside of the hole 4, and a star wheel 12 having a number of claws 11 formed on the outer periphery is fixed thereto. A first link member 14 having a leg portion 13 that can be attached to the claw 11 of the star wheel 12 from below is rotatably supported by a pin 15 fixed to the main body 5, and is rotatably supported by a pin 150 head. The link member 14 is pressed so as to be friction-bonded to the main body 5 by a disc spring 16 disposed between the link members 14 and 16.
4 in the tangential direction of the star wheel 12 so that rotation 1) is possible. Note that the disc spring 16 has a link portion +4
14 displacements in all directions are allowed.

In this (-) link member 14, the 20th link part vJl 7 is rotatably connected to each other by the pin 18 at the +!4. Play I9 is provided.Second link name-b material 17
Further, the main body 5 is rotated via the pin 20 + 'J' H
e. The connecting tool 21 supported by the K tunnel 11 is rotatably supported via a pin 22 at a pivot 612.

The connecting portion 21 is connected to an actuator (not shown) K bushing rod 23 that is operated by being supplied with fluid pressure such as compressed air.

In such a device M1/ri, mL, although the whole unit rotates clockwise around the center of the worm wheel 6, the brake is applied, and in FIG. When the worm wheel 6 is rotated in the clockwise direction, the worm wheel 6 is rotated in the clockwise direction in FIG. i. When the main body 5 rotates clockwise from the non-operating position, the gap between the friction body and the rotating body is the set value, and when this gap is closed and the friction body and the rotating body come into contact, at the same time This link 19 is set to -1,1 so that both links f'Lls A'A' 14.17 are engaged.

(The action of device M: 1 is as follows. When the brake is not applied, the main body 5 is in the state t1! and the play 19 between the second link member 17 and the bottle 18
is located on the upper side of the bin 18, and both link members 14, 17 are in a non-interlocking state.

Assume that the brake is applied in this state, and that the gap between the sMt$ phase and the rotating body is smaller than the set value.

Then, the main body 5 is rotated excessively in the clockwise direction, and both link members 14 and 17, the connecting tool 21, and the four parts of the main body 5 are
If the relative shape of the link mechanism formed by the person changes and becomes erect, the connecting tool 21 will move approximately to the right,
By rotating around the bin 20, the angle formed between the connector 21 and the main body 5 decreases, and the distance between the bins 20 and 15 becomes shorter, and in this process, the link member 17 of 2g2
approaches the first link member 14 and moves around. As the second link member 17 approaches, the top of the bottle 18 is +1!
11:II/J: and 19 gradually decrease, and finally, the bottle 18 and the second link portion 17 come into contact with each other. Since the main body is moved 50 times, it is excessive ;, fi 2 link t'tl<
The material 17 is further transferred to the first link member 14 +1111.
ed) l,, the first link member 14 is rotated ti+IJ around the bottle 15i, and this first link member 141) is rotated 1lIJlnf F9r 5t f
At K, the leg part 18 is engaged with the agile claw 11, which has been disengaged from the one leg part 13 and the claw 11.

If you stop applying the brakes in this condition, the main body 5
is rotated excessively in the counterclockwise direction by the biasing force of the return spring (not shown) in the cam brake. iD+ 1.
The same amount of times as when the txt is sent.

This time 1jlI increases the distance between the bin 202 and the bin 15, so from the first link member 14 li+lj
The second link member 17 moves in the direction in which the second link member 17 moves. This second
Since the link member 17 moves in the direction away from the first link member 14, the link member 17 moves in the direction away from the first link member 14. The link member 14 rotates in the opposite direction to the above case and rotates the worm wheel 8! i・9i can be made.

Therefore, the distance between the friction material and the condylar body is set as follows.

According to the above embodiment, the following effects can be obtained. +i.e., for coordination, links ts#, ji'
6 is aged across the connector 21 and the main body 5,
In addition, since there is no need to install special blocks etc. on the vehicle body, the structure is f/+"itl14 and installation is easy. Also, each part 14, 17 is supported by a shaft, which is a simple Lumi system. The pickup is at the horizontal edge and does not reduce production efficiency.

Although the above-mentioned embodiments have been very effective, the present invention shown in Fig. 1d? Q K k+4 without being determined
It is J-Noh. In other words, the shape of each member can be changed arbitrarily, and the direction of rotation of each member can also be changed (++i
Various aspects can be mentioned, and changes can be considered depending on the model of the vehicle to which the tf! The gap adjustment device ~6 is provided, which has only a small amount of danger and is easy to attach to the vehicle body.

4. The i+i1M'L 19 Ming 1.2 diagram in Figure 1111 is part of the present invention 1j! ! Gap day that is +1313...“
d In the diagram showing the tense situation, % ”) 4'l Figure 1 shows a part of Fi
The front view shown in the ji song, Figure 2 shows one part [the left i! UI If! Figure 1 l... Gap adjustment device 5
...Main body 8...Worm shaft 11...Claw 12...Star wheel 13...+! II ('+1114・
...t■1 link F! lS material 17...Second link i (1% material 19...Play 21...Connector patent issue pII
Figure 2

Claims (1)

[Claims] A worm wheel capable of braking integrally with a camshaft of a cam brake, a worm shaft having a worm that meshes with the worm wheel, a main body rotatably supporting the worm wheel and the worm shaft, and one end of the main body. The arm Gunkichi provided in the arm is pivoted on the arm,
The gap between the friction material of the cam brake and the rotating body is adjusted by adjusting the gap between the friction material of the cam brake and the rotary body by rotating the worm shaft by connecting the bushing rod of the actuator that is suppressed and driven by fluid pressure to the connecting tool. In the device r (with N t
ff, a star wheel with a large number of pawls formed on the outer periphery, a leg portion that can be locked in one direction with the pawls of the star wheel, and rotatable in the tangential direction of the outer periphery of the star wheel, njl M12 a first link 86 material pivotally supported on the main body;
A second link member is provided between the first link member and the connecting tool, and is configured to interlock internal positioning by adjusting the ljib during pruning.
Jj'1. while l<tF,
'11!・″4 Mausoleum Device rE.