JPH04121546U - Band type brake lining wear determination device - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to know the degree of wear on the lining of a band type brake without directly looking at the lining. [Structure] A small rod is fixed to the tip of the rod that transmits the braking force, and the adjustment nut screwed onto the rod is made hollow and attached. The distance between the tip of the small rod and the hollow end of the adjusting nut changes depending on the wear of the lining, so by knowing this distance, the state of wear of the lining can be ascertained. The lining can also be designed such that when this distance becomes zero, the lining reaches its wear limit.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a band type brake, and in detail, it is concerned with the wear and tear of the lining used. The present invention relates to a state determination device.

0002

[Conventional technology]

FIG. 2 is a block diagram of a conventional band type brake. 51 is a cylindrical door The ram is fixed to a part of the shaft that transmits the rotational power of the prime mover to the driven part. There is no communication between the lining 53 fixed to the inside of the band 52 and the drum 51. There is always a slight gap.

0003 Brackets 52a and 52b are fixed to both ends of the band 52, and the lever 7 7 in the direction of arrow C, the band 52 is tightened and the linen is tightened. The ring 53 is pressed against the drum 51 to apply the brake.

0004 3, FIG. 4, and FIG. 5 are views taken along arrows AA, BB, and DD in FIG. 2, respectively. Moreover, FIG. 6 is a three-dimensional illustration of parts related to FIGS. 3, 4, and 5. The operating system will be explained below with reference to these figures.

[0005] In FIG. 4, the rotational force of the lever 77 that is pulled in the C direction is applied to the lever by the shaft 76. 75. Note that the levers 77 and 75 are fixed to the shaft 76. Ma 73 is a link, and 81 is a housing.

[0006] In FIG. 2, 71 is a brake lever, and one end has two links 73 and a pin 72. , 74 to the lever 75, and the other end is bifurcated and connected to the pins 64 and 6. 5 is pivotally mounted as shown. These pins 64 and 65 have S-shaped grooves. It is fitted into a bracket 63 as shown.

[0007] The pin 64 also has a hole in its center that allows the rod 61 to freely pass through. One end of the rod 61 passes through the hole and an adjustment nut 61c is screwed thereto. Ru. These conditions are illustrated in cross section in FIG. The other end of the rod 61 is a joint, and a pin 62 connects the bracket 52. It is pivoted to b. Also, one end of the push rod 56 is fitted into the pin 65, and The other end of the push rod 56 is attached to the bracket 52a in a pressed manner.

[0008] Now, by pulling lever 77 in the direction of arrow C, lever 75 will rotate in the same direction. Therefore, the brake lever 71 is pulled via the link 73. brake lever When 71 is pulled, the pin 65 moves the push rod 56 to the bracket 52 using the pin 64 as a fulcrum. a, and using the pin 65 as a fulcrum, the pin 64 is inserted through the adjustment nut 61c. By pulling the rod 61, the bracket 52b is pulled toward the bracket 52a. Therefore, the band 52 tightens the drum 51 together with the lining 53, and the drum A brake is applied to the ram 51.

[0009] When pulling the lever 77, the gap between the drum 51 and the lining 53 is not appropriate. If not, the pulling amount of the lever 77 will become too large, or the lining 5 may become too small. 3 gets hot, so adjust the adjustment nut 61 to adjust the gap between the drum 51 and the lining. Adjust in advance.

0010 However, if you use this brake, the lining 53 will gradually wear out over a long period of time. As the gap between the drum 51 and the lining 53 becomes larger due to wear, degree adjustment is required. This adjustment is normally performed by removing a lid 82 provided on the housing 81.

[0011]

[Problem that the idea aims to solve]

The problem we are trying to solve is that the band type brake mentioned above is usually located under the driver's seat. Because it is difficult to visually see the gap between the drum and the lining, The problem was that it was difficult to understand the extent of wear on the plugs.

0012

[Means to solve the problem]

This invention makes it possible to check the wear condition of the lining at the adjustment nut. The adjusting nut is hollow, and the adjusting nut is screwed onto the tip of the rod. Fix the small rod and place the ring at the tip of the small rod in the hollow part of the adjustment nut. This allows you to see the degree of wear on the innings.

[0013]

【Example】

FIG. 1 is a cross-sectional view of one embodiment of the device of the present invention, which is compared to the conventional technology shown in FIG. It is compared. In FIG. 1, 1 is a rod, one end of which is pivotally connected to the bracket 52b with a pin 62. A male thread 1a is cut at the other end, and a hollow adjustment nut 2 is screwed onto it. Furthermore, a small rod 1b is fixed to the tip of the rod 1, and the small rod 1b can be adjusted. It is inserted into the hollow part of the nut 2.

[0014] In FIG. 2, the lining 53 is worn out and the gap between it and the drum 51 becomes large. At this time, adjust the gap by tightening the adjustment nut 2 shown in Fig. 1, so By measuring the distance L between the tip 1c and the end of the adjustment nut 2, the wear of the lining 53 can be determined. You can know the extent. Furthermore, the tip 1c of the small rod 1b and the adjustment nut 2 The lining should be designed so that it reaches its usable limit when the distance L from the end of the line becomes 0. This makes it easy to know when to replace the lining.

[0015]

[Effect of the idea]

As explained above, the band type brake lining wear determination device of the present invention is , the degree of wear on the lining can be determined simply by knowing the position of the tip of the small rod and the adjustment nut. This makes maintenance of the brake equipment easier, and its practical value is extremely high. It is.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention.

FIG. 2 is a sectional view of a band type brake according to the prior art.

FIG. 3 is a view taken along the line AA in FIG. 2;

FIG. 4 is a view taken along the line BB in FIG. 2;

FIG. 5 is a view taken along the line DD in FIG. 2;

FIG. 6 is a three-dimensional view of parts related to FIGS. 3, 4 and 5;

[Explanation of symbols]

1 rod 1b small rod 1c End of small rod 2 Adjustment nut 2a End of adjustment nut 51 Drum 52 band 53 Lining

Claims (2)

[Scope of utility model registration request] Claim 1: A cylindrical drum, a band that tightens the drum from the outer periphery, a lining attached to the inside of the band, a rod that pulls the lining to tighten the drum, and a band that tightens the drum from the outer periphery. In a band type brake device consisting of an adjustment nut etc. screwed onto the end of the rod to adjust the gap with the lining, the adjustment nut is made hollow and a small rod is fixed to the tip of the rod. A lining wear determination device for a band type brake, characterized in that the state of wear of the lining can be determined by the positional relationship between the small rod and the hollow adjusting nut. 2. The band type brake according to claim 1, wherein the lining is adjusted so that when the end of the hollow adjustment nut and the end of the small rod coincide, the lining reaches its wear limit. Lining wear determination device.