JPH09144788A - Lining wear detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily judge that a lining reaches its allowable wear limit from the outside of a disk brake device by fitting a lining wear detecting device. SOLUTION: In a lining wear detecting device, detection pins 24 of the same material as that of a lining material are implanted on each end part in the longitudinal direction of a lining fitting plate 16, and a through hole 26 is provided in the detection pin 24. The lining fitting plate 16 is provided with a spring fixing rivet 22 to turnably hold a V-shaped spring 18 and an inflection point part of the spring 18, and a display board 20 is provided on an outer end part of the spring 18. The end part of the spring 18 is pulled toward the detection pin 24, and a wire 28 is passed through the through hole 26 and fixed thereto. When the wear of the lining 11 reaches its limit, a wire 28 is detached from the through hole 26 in the detection pin 24, and the end part of the spring 18 is exposed outside of the outer edge of the lining fitting plate 16 by the releasing force. The display board 20 provided on the end part of the spring 18 is also exposed out of the outer edge of the lining fitting plate 16, enabling to know the replacement timing due to the wear of the lining 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining wear detecting device used in a disc brake device for a railway vehicle, and more particularly to a wear detecting device in which the wear detection can be visually recognized from the outside of the disc brake device.

[0002]

2. Description of the Related Art A vehicle disk brake device used in a railway vehicle is generally constructed as follows. That is, the caliper is provided so as to straddle the disc mounted on the wheel side, and the caliper is connected to the vehicle side by the support frame. Further, a brake shoe consisting of a lining that comes into contact with the disc and a lining mounting plate that fixes the lining is attached to the tip of the caliper, and a hydraulic device including a piston and a cylinder acts on the brake shoe. By introducing the brake fluid into the hydraulic device, the piston can press the brake shoe against the disc. By this operation, the brake shoe facing the disc sandwiches the disc and generates a braking force to decelerate or stop the vehicle. At this time, the braking torque generated in the brake shoe is supported by the torque pin provided on the brake shoe attachment surface of the caliper.

In the disc brake device constructed as described above, since the brake shoe is worn by the braking operation, the brake shoe is replaced when the wear limit is reached. For this reason, it is important to judge whether the brake shoe has reached the wear limit, and regular inspections are performed. In connection with the wear inspection of the brake shoe, there is known a lining wear detection device used in automobiles and the like. The lining wear detection device used in automobiles and the like is an acoustic type that informs the friction pad replacement time by the sound generated by the leaf spring contacting the disk when the friction pad corresponding to the brake shoe wears, and the electric wire. It is an electric type that is covered with an insulator, and when it wears, it is grounded to the disk or the electric wire is cut off so that an alarm informs when it is time to replace the friction pad.

However, when these systems are used in a railroad vehicle, the sound generated by the leaf springs is mixed with other sounds during traveling because the distance between the wheels and the driver's seat is large in the acoustic system, and should be replaced. It is difficult to identify and identify the brake shoe. Also, during the inspection, unless the vehicle is moved and the lining wear detection device does not generate a sound, the replacement portion of the brake shoe cannot be found, so the inspection requires a large space and a lot of labor. In the electric brake wear detection device, there are problems that the circuit for wear detection becomes complicated due to the large number of wheels in the vehicle itself, the cost increases, and the maintenance of the wear detection circuit is newly required. .

For the above-mentioned reason, in the conventional wear inspection of the brake shoe in the railroad vehicle, the minimum thickness of the lining is regularly measured by the maintenance worker, and the replacement timing of the brake shoe is judged by the degree of progress of the wear. ing.

[0006]

By the way, in the disc brake device for a railway vehicle of this type, the lining is arranged between the disc and the caliper. Therefore, when a repair worker measures the minimum thickness of the lining,
It is necessary to perform measurement while inserting a measuring tool for inspection from outside the caliper into the gap between the disc and the caliper,
In addition, the operator had to go under the floor of the vehicle due to the location of the disk in the vehicle, and the measurement was accompanied by poor workability.

Further, in the case of an integral type caliper in which the linings arranged on both sides of the wheel are held by straddling the disc, since the portion straddling the disc partially covers the lining from the outside, the minimum lining is required. Measuring thickness is becoming more difficult. For this reason, it takes a long time and a great deal of labor to measure the minimum thickness of the lining, and improvements to these have been required.

The present invention has been made by paying attention to the above points, and it can be easily judged from the outside of the disc brake device that the lining has reached the allowable wear limit, and the inspection time and labor can be shortened. An object of the present invention is to provide a lining wear detection device including a means.

[0009]

DISCLOSURE OF THE INVENTION The present invention provides a display body which is normally stored on the side of a brake shoe, particularly on the side of a lining mounting plate, and is swung out of the brake shoe when lining wear reaches an allowable limit. It was made based on the finding that the storage and holding of the display body should be released by utilizing the brake shoe wear phenomenon.

From such knowledge, the lining wear detecting device according to the present invention is composed of the lining and the lining mounting plate, and can be swayed outward along the plate surface of the lining mounting plate. A wear indicator is provided. The wear indicating body is held on the plate surface side of the lining mounting plate to provide a stop portion for stopping the shaking, and when the wear of the lining reaches a predetermined value, the holding of the detecting body by the stop portion is released. The above-mentioned object is achieved by the configuration.

Secondly, the stop portion is constituted by a holding portion provided for a detection pin that is worn in accordance with the lining wear so that the wear indicator can be held, and the holding portion has a wear allowable limit range. The height is set so that the holding of the holding portion can be released by the wear of the detection pin.

Thirdly, the wear indicator can be swayed to the outside of the lining mounting plate by spring bias.

Fourthly, the wear indicator can be swayed to the outside of the lining mounting plate by its own weight.

Fifth, the stop portion of the wear indicating body is constituted by a holding plate and held on the surface of the lining mounting plate, and the wear indicating body has a tongue piece having a height corresponding to the lining wear allowable limit. In addition, when the lining wear allowable limit is reached, the pressing plate is deformed by the contact between the tongue piece and the disk so that the wear indicating body can be swung outside the lining mounting plate.

Sixthly, a holding portion is formed on the lining itself so that the stop portion is set in correspondence with the wear allowable limit region of the lining so that the wear indicating body can be held.

[0016]

In the present invention constructed as described above, the detection pin forming the stop portion wears in accordance with the lining wear. Then, when the lining reaches the wear allowable limit, the wear indicating body is swung out to the outside of the lining mounting plate by spring bias or its own weight. Alternatively, when the disc and the tongue piece of the wear indicator contact each other and the frictional force thereof reaches the wear allowable limit, the bearing force of the pressing plate constituting the stop portion is overcome, and the wear indicator is swung out to the outside of the lining. Alternatively, when the wear allowable limit is reached, the insertion hole formed in the lining itself is scraped by wear, so that the holding of the display body is released, and the wear display body is swung out of the lining.
This makes it possible to display the replacement time of the lining due to wear, and the lining wear inspection can be visually discriminated from the outside of the disc brake device, and the inspection time and labor can be shortened.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the lining wear detection device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a lining wear detection device according to the first embodiment. FIG. 1 (1) is a front view of a brake shoe 3 provided with the lining wear detection device, and FIG.
FIG. Brake 3 used for braking railway vehicles
Has a lining mounting plate 16 and is constructed by integrally mounting a lining 11 having a constant thickness on one surface thereof. The lining 11 has a structure of three sheets in the illustrated example, and the linings 11 are arranged along the rotation direction of the disk 10. Then, a mounting space for the lining wear detection device of the embodiment is formed at least on the side end portions (the turn-in side end portion and the turn-out side end portion of the disc 1) of the lining mounting plate 16.

In the lining wear detecting apparatus of the first embodiment, on the plate surface side of the lining mounting plate 16, there is provided a cylindrical detection pin 24 in the mounting space at both end portions, particularly in the outer peripheral edge portion of the disk. The detection pin 24 is
Since it is required to have heat resistance and strength, it is made of a lining material (sintered metal, copper alloy or synthetic friction material) and the like, and the detection pin 24 and the disk 1, the detection pin 24 and a spring material described later,
The detection pin 24 and a wire for connecting the spring material, which will be described later, are different materials and prevent welding of the materials. Further, the thickness of the detection pin 24 is formed to be smaller than the thickness of the lining 11, and when the wear progresses, the detection pin 24 becomes equal to the lining 11 because the brake shoe 3 frictionally brakes the disc 1. It is set to wear. Further, such a detection pin 24 is provided with a through hole 26, and this through hole 26 is used as a stop portion of a wear indicator described later. Therefore, the drilling height of the through hole 26 is set to match the wear allowable limit height of the lining 11, and the wear indicating body is released when the lining 11 reaches the wear allowable limit, which will be described below. The wear display can be operated by the spring force.

A V-shaped spring 18, which is a wear indicator, is provided near the detection pin 24, and the bent portion of the spring 18 is fixed by a rivet 22 to the lining mounting plate 16.
It is rotatably held on the inner peripheral edge side of the disc in the mounting space. As a result, the spring 18 is arranged with the open leg side facing the detection pin 24, the display plate 20 is provided at the end of the release spring portion 18a that is the outer side of the lining 11, and the other end is at the lining 11 side. The pressing spring portion 18b is a pressing spring portion that can be pressed, and the spring fixing rivet 22 is the center of rotation, and the other release spring portion 18a is swayed to the outside of the lining mounting plate 16 by the reaction force of the pressing spring portion 18b. It is like this. in this case,
In the free shape of the spring 18 in the unloaded state, the display plate 20 projects from the outer edge of the lining mounting portion 16, and the display plate 20 can be visually confirmed from the outside of the disc brake device.

The spring 18 serving as the wear indicator is held by the detection pin 24, and this assembly is carried out as follows. The V-shaped spring 18 is operated to close the legs, and a load is applied to the end of the spring 18 on the side where the display plate 20 is provided, while the neighboring detection pin 2
Move closer to 4. Then, as shown in FIG. 2A, the spring 1
The wire 28 is inserted through the through hole 26 to fix the eight ends to the detection pin 24, and the ends of the detection pin 24 and the spring 18 are connected to the wire 28.
Hold through. In this state, the display plate 20 enters inside the outer edge of the lining mounting portion 16, and the display plate 20 cannot be visually confirmed from the outside of the disc brake device.

In the lining wear detecting device set as described above, since the lining 11 has a sufficient thickness when it is new as shown in FIG. However, as the wear of the lining 11 progresses, the thickness of the lining 11 itself becomes thin, and the disk 1 starts to rub not only the lining 11 but also the tip of the detection pin 24 in the vicinity. Then, the wear of the lining 11 and the detection pin 24 progresses, and the through hole 26 provided in the detection pin 24 is also worn away. When the wear further advances and reaches the wear allowable limit of the lining 11, the wire 28 inserted into the through hole 26 is held in the through hole 26 opened by the abrasion of the detection pin 24 as shown in FIG. 2C. It disappears and comes off the detection pin 24. Therefore, the end portion of the release spring portion 18a attached to the display plate 20 is swung out of the lining 11 by the accumulated spring force. As a result, the display plate 20 also projects from the outer edge of the lining mounting plate 16,
The time to replace the lining 11 due to wear can be visually determined from outside the disc brake device.

FIG. 9 shows a form in which the above-described lining wear detection device is incorporated into a disc brake device of a railway vehicle. FIG. 9 is a plan view of a disc brake device for a railway vehicle. The disc brake device for a railway vehicle is provided with a caliper 2 so as to straddle a disc 1 attached to a wheel side. Support frame 5
Is connected to the vehicle side by. At the tip of the caliper 2, a brake shoe 3 made up of a lining that comes into contact with the disc 1 and a lining mounting plate that fixes the lining is attached, and the brake shoe 3 is actuated by a hydraulic device including a piston and a cylinder. By introducing the brake fluid into the hydraulic device, the piston can press the brake shoe 3 against the disc 1. By this operation, the brake shoe 3 facing the disc 1 sandwiches the disc 1 and generates a braking force to decelerate or stop the vehicle. At this time, the braking torque generated in the brake shoe 3 is supported by the torque pin 4 provided on the brake shoe 3 mounting surface of the caliper 2. The lining wear detection device is attached to the side end of the lining mounting plate, and when the lining wear reaches the allowable limit, the wear indicator of the lining wear detection device moves to the outside of the lining mounting plate, and the disc brake. It can be confirmed visually from outside the device.

Further, in FIG. 3, which is an application example of the shape of the detection pin, it is also possible to change it as shown in (1), (2) and (3) of the same figure. That is, the detection pin 24A is set slightly higher than the allowable maximum height of the lining wear, and the groove 26A is formed on the upper end surface thereof. In addition, the perforated portion 27 is located below it.
The wire 28 is wound around the groove 26A and the perforated portion 27, and the release spring portion 18a of the spring 18 is held by the wire 28. In this case, as shown in FIG. 3 (4), the height of the wire 28 positioned in the groove 26A is adjusted to the wear allowable upper limit of the lining 11, and when the lining 11 reaches the wear allowable limit, the disc It is set so that 1 and the wire 28 rub and the wire 28 is cut. With this setting, when the wire 28 is cut due to friction with the disk 1, the accumulated spring force is released, and the release spring portion 18a swings out to the outside of the lining mounting plate. As a result, the display plate 20 attached to the tip of the end projects from the outer edge of the lining attachment plate 16, so that the replacement time of the lining 11 due to wear can be visually confirmed.

Further, in the above-described embodiment and application example, the detection pin 24 and the release spring portion 18a are connected via the wire 28 and the end portion of the release spring portion 18a is held.
As shown in the application example in (1), it is also possible to directly insert the end of the spring 18 into the through hole 26 of the detection pin 24 and hold it without using a wire. In this case, FIG.
As shown in (3), the through hole 26 is arranged so as to have an allowable wear height of the lining 11, and the display plate 20 is provided in the middle of the release spring portion 18a. When brake braking is repeated in this state, wear of the lining 11 starts to progress, and then the disc 1 also contacts the end portion of the detection pin 24, and the detection pin 24 wears together with the lining 11. When the wear allowable limit of the lining 11 is reached, the through hole 26 provided in the detection pin 24 is also scraped, and the end of the release spring portion 18a inserted into the through hole 26 is stored by the stored spring force. It sticks out from the detection pin 24 and protrudes from the outer edge of the lining mounting plate 16 together with the display plate 20.

5 (1), (2), and (3) are application examples in which the mechanism of the lining wear detection device is configured without using the detection pin 24. The lining 11 arranged at the end of the lining mounting plate 16 as shown in this figure
Is provided with a hole 30 (or groove) so that the end of the release spring portion 18a can be inserted, and the height of this hole 30 is set to the wear allowable upper limit of the lining 11. Further, the release spring portion 18a to be inserted into the lining 11
A display plate 20 is provided on the middle side of the release spring 1
By bending the tip of 8a in a U shape and engaging with the hole 30, the release spring 18a is held in the hole 30 while maintaining the spring force. When the lining 11 reaches the wear allowable limit due to wear from this state, the release spring portion 18a
Is exposed to the outside from the side of the disk 1 and is released by the stored spring force to swing out from the lining 11 and project together with the display plate 20 from the outer edge of the lining mounting plate 16.

In the first embodiment and its application example, the replacement time of the lining 11 is displayed by the restoring force of the spring. However, as shown in the second embodiment in FIG. It is also possible to configure the lining wear detection device by utilizing the force generated at the time. As shown in (1) and (2) of the figure, the detection plate 32 is arranged in the detection device mounting space formed in the lining mounting plate 16,
One end of the detection plate 32 is rotatably fixed to the lining mounting plate 16 with a screw 34. Further, the other end of the detection plate 32 has an L-shaped bent portion 32a that serves as a tongue piece in the thickness direction of the lining 11, and the bending height is set to a height that is a wear allowable limit of the lining. There is. Further, as the material of the detection plate 32, a material different from the material of the disk 1 (for example, aluminum material) is selected so that the surface of the disk 1 is not damaged even if the disk 1 and the detection plate 32 contact and rub against each other during wear detection. . The detection plate 32 is held on the lining mounting plate 16 by a thin deformable pressing plate 36 provided on the lining mounting plate 16. At this time, the detection plate 32 is arranged so as to rotate around the screw 34 by its own weight and swing out to the outside of the lining mounting plate 16 when the pressing plate 36 does not have a stopping function.

The operation of the lining wear detection device having such a structure is such that when the disc 1 and the lining 11 repeat friction, and when the thickness of the lining 11 reaches the height at which the wear is allowed, the disc 1 only has the lining 11. Instead, the rubbing is also generated on the L-shaped bent portion 32a of the detection plate 32 described above. As a result, a rotational force due to friction with the disk 1 is generated on the detection plate 32 about the position of the screw 34. When this rotational force exceeds the holding force of the holding plate 36 holding the detecting plate 32, the detecting plate 32 kicks the holding plate 36 to rotate, and as shown in FIG. The bent portion 32a projects from the outer edge of the lining mounting plate 16. At this time, the pressing plate 36 holding the detection plate 32 is deformed by the kicking of the detection plate 32, and the holding of the detection plate 32 is released. From this, it becomes possible to easily visually determine the replacement timing of the lining 11 due to wear from the outside of the disc brake device.

FIG. 7 is a structural explanatory view of a lining wear detecting device according to the third embodiment. This has a structure suitable when the longitudinal direction of the brake shoe is vertically arranged. That is, a detection pin 24 made of a lining material is formed so as to project in the thickness direction of the lining 11 at the end of the lining mounting plate 16 in the lower direction in the longitudinal direction. 26 are provided. The through hole 26 is arranged so as to have a position height at which the wear indicator operates at the lining wear allowable limit described later. Further, a display rod 38 serving as a wear indicator is arranged near the detection pin 24, and one end of the display rod 38 is rotatably held on the lining mounting plate 16 by a fixed rivet 39. In this state, the display rod 38 hangs down from the fixed rivet 22 by its own weight, and the head portion of the display rod projects from below the outer edge of the lining mounting plate 16. Then, the above-mentioned display rod 38 is rotated around the fixed rivet 39, and the tip of the display rod 38 is detected by the detection pin 24.
Move to near. In this state, the wire 28 is used to insert one end of the wire 28 into the through hole 26 to detect the detection pin 24.
The display bar 38 is held.

In the lining wear detecting device set as described above, since the lining 11 has a sufficient thickness when it is new, the disc 1 rubs only against the lining 11 to perform braking. However, as the wear of the lining 11 progresses, the thickness of the lining 11 itself becomes thinner, and the disc 1 starts to rub not only the lining 11 but also the tip of the detection pin 24 in the vicinity. The wear of the lining 11 and the detection pin 24 progresses, and the detection pin 2
The through-hole 26 provided in No. 4 is also worn away. When the wear further progresses and the wear limit of the lining 11 is reached, the wire 28 inserted through the through-hole 26 becomes
6 is no longer held and comes off the detection pin 24. As a result, the end portion of the display rod 38 is swung out to the lower side of the lining mounting plate 16 by its own weight. As a result, the display rod 38 projects from below the outer edge of the lining mounting plate 16, and the lining replacement time can be visually confirmed.

In contrast to the above-mentioned embodiment, FIG. 8 (1)
Shown in FIG. 7 is an application example in which the display rod 38 is replaced with the display rod 38 and the connecting rod 40 connected to the display rod 38 in a link shape. In this case, when the end portion of the connecting rod 40 is rotatably held by the fixed rivet 39, and the display rod 38 is held by the detection pin 24 via the wire 28, the display rod 38 and the connecting rod 40 are joined to each other. Bend it so that it fits within the outer edge of the lining mounting plate 16. When the wear allowable limit of the lining 11 is displayed, the display rod 38 and the connecting rod 40 are fully extended by their own weight, so that the display rod 38 can be projected further outward from the lining mounting plate 16. From this, even if there is an obstacle around the disc brake device during the inspection, the display rod 38 is easily projected because of the large protrusion amount of the display rod 38, and the reduction of the inspection efficiency can be prevented.

Further, FIG. 8 (2) shows an application example in which the mechanism of the lining wear detection device is constructed without using a wire. As shown in this drawing, a detection pin 24 made of a lining material is formed in the height direction of the lining 11 below the end of the lining mounting plate 16 in the longitudinal direction. A through hole 26 is provided so that 38 can be inserted. Further, the through hole 26 is arranged so as to have a position height at which the wear indicating body operates at the lining wear allowable limit described later. A fixed rivet 39 is provided in the vicinity of the detection pin 24, and the fixed rivet 39 rotatably holds the end of the connecting rod 40, which is a wear indicator. The other end of the connecting rod 40 is linked with another indicator rod 38, which is a wear indicator, in a link shape. A bent portion is formed on the other side of the end portion connected to the connecting rod 40 by the display rod 38, and the bent portion is inserted into the through hole 26 to hold the display rod 38.

In the lining wear detecting device constructed as described above, when the wear advances and reaches the wear allowable limit of the lining 11, the display rod 38 inserted into the through hole 26 is not held in the through hole 26 and is detected by the detection pin 24. Come off. For this reason, the display rod 38 and the connecting rod 40 are swung out to the lower side of the lining mounting plate 16 by their own weight. As a result, the display rod 38 and the connecting rod 40 project from below the outer edge of the lining mounting plate 16, so that the replacement time of the lining 11 can be visually confirmed.

FIG. 8C shows an application example in which the lining wear detecting device is constructed without using the detecting pin 24. As shown in this figure, the lining 11 arranged at the end of the lining mounting plate 16 is provided with a hole 30 (or groove) so that the end of the display rod 38 can be inserted therein. The height of the lining 11 is set to the maximum allowable height of wear of the lining 11. Then, the display rod 38 connected to the connection rod 40 in the form of a link is inserted into and held in the hole 30.

In the lining wear detecting device constructed as described above, when the wear advances and reaches the wear allowable limit of the lining 11, the end portion of the display rod 38 is exposed from the disk 1 side,
It is pushed out from the fixed rivet 39 to the lower side of the lining mounting plate by its own weight and protrudes from the outer edge of the lining mounting plate 16. This makes it possible to visually confirm the replacement time of the lining 11.

In the disc brake device, the lining 11 is closer to the longitudinal end of the lining mounting plate 16.
Therefore, the lining wear detection device described above is arranged at the end of the lining mounting plate 16 in the longitudinal direction in order to detect the wear of the end of the lining 11. However, in the first and second embodiments, it is possible to attach the lining attachment plate 16 to any place if visual confirmation can be made, and also in the third embodiment, in a place where wear detection can be displayed by its own weight. If there is, it can be arranged freely. As a result, a plurality of lining wear detection devices can be arranged around the brake shoe 12, and the wear condition of the brake shoe 12 can be inspected in more detail.

[0036]

As described above, according to the present invention, the wear indicator which is normally stored and retained on the side of the brake shoe is worn, and the storage and retaining portion of this indicator is worn in the same manner as the lining or the lining. It is formed by a detection pin or a pressing plate, and the holding portion is released due to the phenomenon that the lining and the detection pin wear due to contact with the disk,
Since the display can be swung out to the outside of the brake, it is possible to externally display the lining replacement time due to wear, and the lining wear inspection can be visually inspected from the outside of the disc brake device, shortening the inspection time and labor Can be reduced.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a lining wear detection device according to a first embodiment.

FIG. 2 is an operation explanatory view of the lining wear detection device according to the first embodiment.

FIG. 3 is an explanatory diagram of an application example of a detection pin of the lining wear detection device according to the first embodiment.

FIG. 4 is a diagram showing V of the lining wear detection device according to the first embodiment.
It is an application example explanatory view in character spring maintenance.

FIG. 5: V of the lining wear detection device according to the first embodiment
It is an application example explanatory view in character spring maintenance.

FIG. 6 is a structural explanatory view of a lining wear detection device according to a second embodiment.

FIG. 7 is a structural explanatory view of a lining wear detection device according to a third embodiment.

FIG. 8 is an explanatory diagram of an application example of the lining wear detection device according to the third embodiment.

FIG. 9 is a side view of a railway vehicle disc brake device to which the first embodiment is applied.

[Explanation of symbols]

 1 Disc 2 Caliper 3 Bracket 4 Torque Pin 5 Support Frame 11 Lining 16 Lining Mounting Plate 18 Spring 18a Release Spring Part 18b Pressing Spring Part 20 Display Plate 22 Spring Fixing Rivet 24 Detecting Pin 24A Detecting Pin 26 Through Hole 26A Groove 27 Drilling Part 28 Wire 30 Hole 32 Detection plate 32a Bending part 34 Screw 36 Holding plate 38 Display rod 39 Fixed rivet 40 Connection rod

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ichiro Suwa 19-5 Nihombashi Koamicho, Chuo-ku, Tokyo Inside Akebono Break Industry Co., Ltd. (72) Inventor Shinji Mochida 19th, Nihombashi Koamicho, Chuo-ku, Tokyo No. 5 In Akebono Break Industry Co., Ltd. (72) Inventor Kaname Demura 19-5 Nihombashi Koamicho, Chuo-ku, Tokyo No. 5 In Akebono Break Industry Co., Ltd. (72) Inventor Toshihiko Sugiyama Nakamura-ku, Aichi Prefecture Station 1-4-1 Tokai Passenger Railway Co., Ltd. (72) Inventor Hirose Kuya Nakamura-ku, Aichi Prefecture Nagoya City 1-4-1-4 Tokai Passenger Railway Co., Ltd. (72) Inventor Satoshi Suzuki Aichi Tokai Passenger Railway Co., Ltd. 1-4-1, Mei Station, Nakamura-ku, Nagoya

Claims (6)

[Claims] 1. A lining wear detection device for a brake shoe comprising a lining and a lining mounting plate, comprising a wear indicator which can be swayed outward along the plate surface of the lining mounting plate. The wear indicator is held on the plate surface side of the lining mounting plate to provide a stop portion for stopping vibration, so that when the wear of the lining reaches a predetermined value, the holding of the detector by the stop portion is released. A lining wear detection device characterized by the above. 2. The stop portion is configured by a holding portion provided for a detection pin that wears in accordance with lining wear so that the wear indicating body can be held, and the holding portion is set to an allowable wear limit height. However, the holding of the holding portion can be released by the wear of the detection pin.
The lining wear detection device according to. 3. The lining wear detection device according to claim 1, wherein the wear indicator is swingable to the outside of the lining mounting plate by a spring bias. 4. The lining wear detecting device according to claim 1, wherein the wear indicator is swingable to the outside of the lining mounting plate by its own weight. 5. The stop portion of the wear indicating body is constituted by a holding plate and is held on the surface portion of the lining mounting plate, and the wear indicating body is provided with a tongue piece having a height corresponding to a lining wear allowable limit. The lining wear according to claim 1, wherein when the tolerable lining wear limit is reached, the pressing plate is deformed by the contact between the tongue piece and the disk, and the wear indicator is shaken out of the lining mounting plate. Detection device. 6. The wear indicator can be held by forming a holding portion on the lining itself, the holding portion being set so as to correspond to the wear allowable limit area of the lining. The lining wear detection device described.