JPH04126041U - Pad wear thickness measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To specifically measure the pad wear thickness of a disc brake mounted in a position that is difficult to visually confirm at any time without removing the wheel, etc. [Configuration] The measuring device 1 is attached to a plate 4 with a permanent magnet 2 attached.
It consists of a cylinder 5 whose rear end serves as a wear amount indicator, and a scale bar 6 which is rotatably and slidably passed through the cylinder. A terminal 7 is provided at the tip of the scale bar 6 and can be brought into contact with the front surface of the back plate of the pads 13 and 14. plate 4
is attracted to the position reference surface of the caliper 11 (the head of the bridge bolt 15 in the figure) with the permanent magnet 2, and when the terminal 7 is applied to the front surface of the back plate of the pad, the amount of relative displacement from the initial position of the pad and the caliper ( = wear amount) can be specifically determined by reading the numerical value on the scale 9 located at the rear end position of the cylinder 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is suitable for discs installed inside vehicle wheels or in deep locations of industrial machinery. To specifically measure the amount of brake pad wear without removing the wheels, etc. This invention relates to a pad wear thickness measuring device.

0002

[Conventional technology]

For example, when a brake is installed inside the wheel of a railway vehicle or a construction vehicle, It becomes very difficult to check the wear condition of the pads because they are obstructed by the wheels. child Therefore, the wheels are fitted using wear indicators 16 and 17 as shown in Figure 3. This makes it possible to inspect the equipment as it is. The disc brake 10 shown in the figure is a caliper. Suspend pads 13 and 14 from pin 11 to It is a piston-opposed type brake that is pressed by a stone, and the indicators 16 and 17 are fixed to each pad. Pads 13 and 14 are worn out and are on the disc side. As it moves, the distance between the tips of the wear indicators 16 and 17 gradually decreases, and the situation Check whether the pad has worn to the limit by comparing it with the reference surface. Ru.

0003

[Problem that the idea aims to solve]

Wear inspection using the above method may be difficult depending on the relationship between the caliper and the wheel. The indicator itself may be difficult to see, or vibration noise may occur due to the indicator's rigidity. do.

0004 In addition, although the limit point of wear can be determined, inspection before reaching the limit can determine the specific number of millimeters of wear. It is not possible to measure what happened.

[0005] This invention attempts to provide a pad wear thickness measuring device that solves this problem. It is.

[0006]

[Means to solve the problem]

This measuring device uses its own permanent magnet to measure the position of the disc brake caliper. A plate is attached to the reference surface, and a disk shaft is attached to this plate in use. A scale bar that is slidably and rotatably installed in parallel orientation, and a plate. and a wear amount indicator provided integrally on the front side. Scale bar is at the tip Rotate the bar to the side and move the terminal to the front of the back plate of the pad, and insert the above terminal to the rear side. The position where the rate is attracted to the caliper and the above terminal is applied to the front of the back plate of the unworn pad. Use the ones that each have a scale starting from .

[0007]

[Effect]

The amount of relative displacement in the disk axial direction that occurs between the caliper and the pad is the amount of pad wear. equal. This measuring device uses a scale bar to read the relative displacement of the bar. Since it is displayed on a scale, the specific amount of wear can be determined at any time. Also, adjust the scale bar. If you make the scale long enough, you can read the scale on the outside of the caliper, making it difficult to read. Problems will disappear.

[0008]

【Example】

Figure 1 shows an example of a pad wear thickness measuring device used for piston-opposed disc brakes. shows. This measuring device 1 consists of a permanent magnet 2, a magnet case 3, a plate 4, and this plate. The cylinder 5 is fixed to the It is composed of a round bar scale bar 6 that can be freely supported. Tip of scale bar 6 A terminal 7 projecting in the direction perpendicular to the axis is provided at the rear end, and a lever 8 is provided at the rear end. Also , on the rear outer periphery of this scale bar, a pad is attached with the rear end of the cylinder 5 as an indicator. A scale 9 is carved to measure the amount of wear. Scale 9 is the scale for the inner pad and the outer pad. Separate scales are provided for the pads.

[0009] FIG. 2 shows the measuring device of FIG. 1 in use. The example measuring instrument is machined in sections. Measure the head of the bridge bolt 15 that connects the inner and outer sides of the caliper 11. It is designed to be used as a regular position reference surface, and the permanent magnet 2 is attracted to this surface. to fix the plate 4. Next, turn the lever 8 in the direction of disk rotation so that the terminal 7 Make sure that the scale bar does not get caught on the inner caliper and inner pad, and then Push in and insert terminal 7 close to the outer pad zone. And here Move the tip of the terminal 7 to the front of the back plate of the pad with the tip of the bar 8 facing toward the center of the disk. and press the scale bar until the outer surface of the terminal touches the front of the back plate of the outer pad 14. At this position, read the scale indicated by the rear end of cylinder 5. After this, lever 8 Pull back the scale bar 6 without changing the direction of the terminal 7 so that the inner pad 13 Read the scale on the inner side when it hits the front of the back plate. The scale is on the inner side, the outer side Both sides display the amount of wear from the position where terminal 7 hits the front of the back plate of the unworn pad. Since the amount of wear on the outer pad 14 is determined by the earlier reading, the amount of wear on the outer pad 14 is determined by the later reading. The amount of wear on the inner pad 13 can be determined by looking at the figure.

0010 After completing the measurement in this way, point the tip of the lever 8 in the direction of disk rotation. Pull back the scale bar 6 all the way and remove the measuring instrument while knocking down the cylinder 5. .

[0011] The scale provided on the scale bar indicates the remaining thickness of the pad, as shown in Figure 2. It is preferable to do so.

0012

[Effect of the idea]

As mentioned above, the measuring device of this invention has a relationship between the pad and caliper from their initial positions. Since the displacement amount can be read using a scale bar, it is possible to measure the amount of wear on the pad. It becomes possible to

[0013] In addition, the scale display can be pulled out to an easy-to-read position to solve the problem of difficulty in viewing. Furthermore, since it can be removed after measurement, it also helps prevent brake noise.

[Brief explanation of drawings]

[Figure 1] A perspective view showing an example of a measuring device

[Figure 2] Front view showing how the measuring instrument is used

[Figure 3] Plan view showing the wear measurement method using an indicator

[Explanation of symbols]

1 Measuring device 2 Permanent magnet 3 Magnet case 4 plate 5 cylinder 6 Scale bar 7 Terminal 8 Lever 9 scale 10 Disc brake 11 Caliper 13, 14 Pad 15 Bridge bolt

Claims (1)

[Scope of utility model registration request] [Claim 1] A plate that is attracted to a surface that serves as a position reference of a disc brake caliper using its own permanent magnet;
This plate is equipped with a scale bar that is slidably and rotatably attached to the plate in a direction parallel to the disk axis when in use, and a wear amount indicator that is integrally provided on the plate side, and the scale bar is on the tip side. A terminal is moved to the front of the back plate of the pad by rotating a bar, and a scale is provided on the rear side starting from the position where the plate is attracted to the caliper and the terminal is brought into contact with the front surface of the back plate of the unworn pad. A pad wear thickness measuring device consisting of: