Brake head and brake shoe fixing mechanism

Abstract

The invention relates to the technical field of brake shoe holders, in particular to a brake shoe holder and a brake shoe fixing mechanism, the brake shoe holder comprises a brake shoe holder main body, a brake shoe main body is attached to the inner arc surface of the brake shoe holder main body, mounting plates are symmetrically and fixedly connected to the outer arc surface of the brake shoe holder main body, and a fixing mechanism and a warning mechanism are arranged on one side wall of one mounting plate. By arranging the fixing mechanism, screws and tools do not need to be used for dismounting the brake shoe, operation is convenient, and the brake shoe can be conveniently fixed and dismounted in a complex and narrow-space structure at the bottom of a railway vehicle. By arranging the warning mechanism, a worker can be more intuitively assisted to observe and judge whether the use wear degree of the brake shoe is about to exceed half, the problem that the worker observes the wear degree of the brake shoe by himself or herself to cause erroneous judgment is avoided, and the problems that the brake shoe is replaced too early and is not replaced in time are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of brake shoe supports, in particular to a brake shoe support and a brake shoe fixing mechanism. Background Art

[0002] Brake shoes are the core components of the railway vehicle braking system, which are used to contact with wheels or brake discs to slow down or stop the vehicle through friction. Brake shoe supports are components used to support and fix brake shoes, and are usually connected to brake beams or brake brackets.

[0003] After long-term use and wear, brake shoes need regular maintenance and replacement. However, the brake shoes are inserted into the inner side of the brake shoe holder and are locked and fixed by screws. The bottom structure of railway vehicles is relatively complex, and the brake shoes are located at the bottom of railway vehicles near the wheels. The operating space is relatively narrow, and it is not convenient to use tools to unscrew and tighten the screws, making the fixing and removal of brake shoes more troublesome.

[0004] At the same time, when the brake shoe is worn to 50% of its original thickness, it cannot be used anymore. The wear degree of the brake shoe is usually observed by the staff to judge whether it needs to be replaced, which is not accurate enough and is prone to problems such as premature replacement and untimely replacement of the brake shoe. For this reason, we propose a brake shoe support and brake shoe fixing mechanism. Summary of the invention

[0005] The object of the present invention is to provide a brake shoe support and a brake shoe fixing mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a brake shoe support and a brake shoe fixing mechanism, comprising a brake shoe support body, the inner arc surface of the brake shoe support body is attached to the brake shoe body, and the outer arc surface of the brake shoe support body is symmetrically fixedly connected to a mounting plate, and a fixing mechanism and a warning mechanism are respectively provided on one side wall of the mounting plate; The warning mechanism includes a rotating column rotatably connected to a side wall of the mounting plate, the rotating column is fixedly connected to a vertical plate at one end away from the mounting plate, the vertical plate is fixedly connected to a block at the side wall away from the rotating column, and a limiting mechanism is provided between the vertical plate and the mounting plate, a guide column is slidably inserted into the inner wall of the block, a splicing block is fixedly connected to the front end of the guide column, a roller is rotatably provided in front of the splicing block through an elastic component, and a second spring is fixedly connected between the splicing block and the block, the second spring is slidably sleeved on the outer wall of the guide column, and a light-emitting mechanism is provided between the rear end of the guide column and the block.

[0007] Preferably, the fixing mechanism includes a U-shaped block, which is fixedly connected to one side wall of the mounting plate near the upper edge, and the U-shaped block is close to the brake shoe body, and a pin is slidably inserted into the inner wall of the U-shaped block, and the lower end of the pin is slidably inserted into the middle inner wall of the brake shoe support body and the brake shoe body in turn, and the outer wall fixing sleeve of the pin is provided with a fixing ring, the lower end of the fixing ring is fitted with the middle outer wall of the brake shoe support body, and a spring four is rotatably connected between the fixing ring and the U-shaped block, and the spring four sliding sleeve is arranged on the outer wall of the pin, and a supporting assembly is provided between the upper end of the pin and the mounting plate.

[0008] Preferably, the supporting assembly includes a support block and a pull plate, the support block is fixedly connected to the side wall of the mounting plate and is located directly above the U-shaped block, the pull plate is fixedly connected to the upper end of the latch, and a groove is provided at the upper end of the pull plate corresponding to the support block.

[0009] Preferably, the limiting mechanism includes two limiting columns and four hole grooves, the two limiting columns are respectively slidably inserted in the inner walls at the upper and lower edges of the vertical plate, and the two limiting columns are commonly fixedly connected with a pulling column at one end away from the mounting plate, and the outer walls of the two limiting columns away from the pulling column are commonly slidably sleeved with a connecting plate, the connecting plate is fixedly sleeved on the outer wall of the rotating column, and the connecting plate and the mounting plate are fitted together, the four hole grooves are opened on one side wall of the mounting plate in a central annular array around the rotating column, the other ends of the two limiting columns are respectively slidably matched with two of the hole grooves, and elastic components are provided between the two limiting columns and the vertical plate.

[0010] Preferably, the elastic component includes a connecting ring, which is fixedly mounted on the outer wall of the limiting column, and the connecting ring is located between the vertical plate and the connecting plate, and a spring 1 is fixedly connected between the connecting ring and the vertical plate, and the spring 1 is slidably mounted on the outer wall of the limiting column.

[0011] Preferably, the elastic component includes four support columns, the four support columns are respectively slidably inserted in the inner walls at the four corners of the splicing block, and the front ends of the four support columns are commonly fixedly connected with a concave block, the axle of the roller is rotatably connected to the inner concave surface of the concave block, four springs three are fixedly connected between the concave block and the splicing block, the four springs three are respectively slidably mounted on the outer walls of the four support columns, and the rear ends of the four support columns are fixedly connected with a limiting disk, and the four limiting disks are in fit with the splicing block.

[0012] Preferably, the light-emitting mechanism includes an L-shaped plate and a touch plate, the L-shaped plate is fixedly connected to the front end of the block, and a warning light and a fixed column are respectively fixedly installed on the vertical walls of the L-shaped plate, a touch switch is fixedly connected to the end of the fixed column away from the L-shaped plate, the touch switch and the warning light are electrically connected, the touch plate is fixedly connected to the rear end of the guide column, the touch plate is in contact with the block, and the front end of the touch plate is close to the rear end of the touch switch.

[0013] Preferably, mounting holes are provided on the side walls of the two mounting plates away from the brake shoe body, a limiting plate is fixedly connected to one side wall of the brake shoe support body away from the rotating column, and the limiting plate is in close contact with the brake shoe body.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a fixing mechanism, the brake shoe can be disassembled and assembled without using screws and tools, and the operation is convenient. The brake shoe can be conveniently fixed and disassembled in the complex structure and narrow space at the bottom of the railway vehicle.

[0015] 2. By setting up a warning mechanism, it can more intuitively assist the staff to observe and judge whether the degree of wear of the brake shoe is about to exceed half, avoiding the staff to observe the degree of wear of the brake shoe by themselves and causing misjudgment, and avoiding the problem of premature replacement or untimely replacement of the brake shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of the structure at center; Figure 3 It is a structural schematic diagram of the warning mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle; Figure 5 It is a partial cross-sectional view of the brake shoe support body and the brake shoe body of the present invention; Figure 6 For the present invention Figure 5 A magnified view of the structure at C in the middle; Figure 7 It is a structural schematic diagram of the limiting plate of the present invention; Figure 8 It is a partial top view of the present invention.

[0017] In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1. Mounting hole; 2. Mounting plate; 3. Limiting plate; 4. Brake shoe support body; 5. Brake shoe body; 6. Roller; 7. Vertical plate; 8. Hole groove; 9. Rotating column; 10. Connecting plate; 11. Connecting ring; 12. Spring one; 13. Touch plate; 14. Spring two; 15. Guide column; 16. Pull column; 17. Block; 18. L-shaped plate; 19. Warning light; 20. Limiting column; 21. Touch switch; 22. Concave block; 23. Limiting plate; 24. Splicing block; 25. Support column; 26. Spring three; 27. Groove; 28. Pull plate; 29. ​​Fixed ring; 30. Spring four; 31. U-shaped block; 32. Latch; 33. Support block; 34. Fixed column. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides a technical solution: Figure 1 - Figure 8 The brake shoe support and brake shoe fixing mechanism shown in the figure include a brake shoe support body 4, the inner arc surface of the brake shoe support body 4 is fitted with a brake shoe body 5, and the outer arc surface of the brake shoe support body 4 is symmetrically fixedly connected with a mounting plate 2, and a fixing mechanism and a warning mechanism are respectively provided on one side wall of one mounting plate 2; The warning mechanism includes a rotating column 9 rotatably connected to a side wall of the mounting plate 2, and the end of the rotating column 9 away from the mounting plate 2 is fixedly connected to a vertical plate 7, and the side wall of the vertical plate 7 away from the rotating column 9 is fixedly connected to a block 17, and a limiting mechanism is provided between the vertical plate 7 and the mounting plate 2, and a guide column 15 is slidably inserted into the inner wall of the block 17, and the front end of the guide column 15 is fixedly connected to a splicing block 24, and a roller 6 is rotatably provided in front of the splicing block 24 through an elastic component, and a spring 2 14 is fixedly connected between the splicing block 24 and the block 17, and the spring 2 14 is slidably sleeved on the outer wall of the guide column 15, and a light-emitting mechanism is provided between the rear end of the guide column 15 and the block 17.

[0020] The fixing mechanism includes a U-shaped block 31, which is fixedly connected to one side wall of the mounting plate 2 near the upper edge, and the U-shaped block 31 is close to the brake shoe body 5, and a latch 32 is slidably inserted into the inner wall of the U-shaped block 31, and the lower end of the latch 32 is slidably inserted into the middle inner wall of the brake shoe support body 4 and the brake shoe body 5 in turn, and the outer wall of the latch 32 is fixedly sleeved with a fixing ring 29, the lower end of the fixing ring 29 is in contact with the middle outer wall of the brake shoe support body 4, and a spring four 30 is rotatably connected between the fixing ring 29 and the U-shaped block 31, and the spring four 30 is slidably sleeved on the outer wall of the latch 32, and a supporting assembly is provided between the upper end of the latch 32 and the mounting plate 2.

[0021] The supporting assembly includes a support block 33 and a pull plate 28. The support block 33 is fixedly connected to the side wall of the mounting plate 2 and is located directly above the U-shaped block 31. The pull plate 28 is fixedly connected to the upper end of the latch 32, and a groove 27 is provided at the upper end of the pull plate 28 corresponding to the support block 33.

[0022] The limiting mechanism includes two limiting columns 20 and four holes 8. The two limiting columns 20 are respectively slidably inserted in the inner walls at the upper and lower edges of the vertical plate 7, and the ends of the two limiting columns 20 away from the mounting plate 2 are commonly fixedly connected with the pulling column 16, and the outer walls of the two limiting columns 20 away from the pulling column 16 are commonly slidably sleeved with a connecting plate 10, the connecting plate 10 is fixedly sleeved on the outer wall of the rotating column 9, and the connecting plate 10 is fitted with the mounting plate 2. Four holes 8 are opened on one side wall of the mounting plate 2 in a central annular array around the rotating column 9, and the other ends of the two limiting columns 20 are respectively slidably matched with two of the holes 8, and elastic components are provided between the two limiting columns 20 and the vertical plate 7.

[0023] The elastic component includes a connecting ring 11 and a spring 12. The connecting ring 11 is fixedly sleeved on the outer wall of the limiting column 20, and the connecting ring 11 is located between the vertical plate 7 and the connecting plate 10. A spring 12 is fixedly connected between the connecting ring 11 and the vertical plate 7, and the spring 12 is slidably sleeved on the outer wall of the limiting column 20.

[0024] The elastic component includes four support columns 25, which are respectively slidably inserted into the inner walls at the four corners of the splicing block 24, and the front ends of the four support columns 25 are commonly fixedly connected with a concave block 22, the axle of the roller 6 is rotatably connected to the inner concave surface of the concave block 22, and four springs three 26 are fixedly connected between the concave block 22 and the splicing block 24. The four springs three 26 are respectively slidably sleeved on the outer walls of the four support columns 25, and the rear ends of the four support columns 25 are fixedly connected with a limiting disk 23, and the four limiting disks 23 are in contact with the splicing block 24.

[0025] The light-emitting mechanism includes an L-shaped plate 18 and a touch plate 13. The L-shaped plate 18 is fixedly connected to the front end of the block 17, and a warning light 19 and a fixing column 34 are fixedly installed on the vertical walls of the L-shaped plate 18 respectively. The end of the fixing column 34 away from the L-shaped plate 18 is fixedly connected to a touch switch 21, and the touch switch 21 is electrically connected to the warning light 19. The touch plate 13 is fixedly connected to the rear end of the guide column 15, and the touch plate 13 is in contact with the block 17, and the front end of the touch plate 13 is close to the rear end of the touch switch 21.

[0026] The side walls of the two mounting plates 2 are both provided with mounting holes 1 away from the brake shoe body 5 , and a limit plate 3 is fixedly connected to a side wall of the brake shoe support body 4 away from the rotating column 9 , and the limit plate 3 fits the brake shoe body 5 .

[0027] Working principle: When fixing the brake shoe body 5, first pull the pull column 16 outward, and the pull column 16 can drive the two limit columns 20 to slide in the inner wall of the connecting plate 10 and the vertical plate 7. Each limit column 20 will drive the connected connecting ring 11 to squeeze the corresponding spring 12 until the two limit columns 20 slide out of the corresponding two hole grooves 8 respectively, and then rotate the pull column 16 90 degrees clockwise, which will drive the two limit columns 20, the block 17, and the rotating column 9, the connecting plate 10, the guide column 15, the splicing block 24, the roller 6 and the spring 2 14 are rotated clockwise by 90 degrees, and then the pull column 16 is released. Under the action of the spring 12, the limit column 20 will automatically reset and be inserted into the other two corresponding hole grooves 8 respectively, thereby fixing the two limit columns 20, the block 17, the rotating column 9, the connecting plate 10, the guide column 15, the splicing block 24, the roller 6 and the spring 2 14 together, and the direction is downward.

[0028] The pull plate 28 is then held and moved upward, and the pull plate 28 will drive the latch 32 to slide upward between the U-shaped block 31 and the middle inner wall of the brake shoe support body 4, and the latch 32 will drive the fixing ring 29 to squeeze the spring four 30 connected to the U-shaped block 31, and the pull plate 28 will move upward through the groove 27 and pass over the support block 33 until the lower end surface of the pull plate 28 is higher than the upper end surface of the support block 33, and then the pull plate 28 is rotated a little so that the groove 27 and the support block 33 are staggered a little. At this time, because the spring four 30 is rotatably connected between the fixing ring 29 and the U-shaped block 31, rotating the pull plate 28 will drive the latch 32, the fixing ring 29 and the spring four 30 to rotate together, and then the pull plate 28 is released. At this time, under the action of the spring four 30, the pull plate 28 will move downward and be mounted on the upper end of the support block 33, and the lower end surface of the latch 32 will be flush with the inner side surface of the brake shoe support body 4 and remain fixed.

[0029] Then, the brake shoe body 5 can be slid and inserted into the inner arc surface of the brake shoe support body 4 without any obstruction, and the brake shoe body 5 is fitted with the limit plate 3, and then the pull plate 28 is rotated in the opposite direction until the groove 27 corresponds to the support block 33 to release the pull plate 28. At this time, the pull plate 28 is not limited by the support block 33. Under the action of the spring 430, the pin 32 will move down and be inserted into the middle inner wall of the brake shoe body 5, thereby fixing the brake shoe body 5. Figure 5 As shown, the brake shoe body 5 can be disassembled otherwise. Then, the disassembly and assembly of the brake shoe body 5 does not require the use of screws and tools, and the operation is convenient. The brake shoe body 5 can be conveniently fixed and disassembled in the complex and narrow space structure at the bottom of the railway vehicle.

[0030] Then, in the opposite way, that is, pull the pull column 16 outward and rotate it 90 degrees counterclockwise and then release the pull column 16. Similarly, the two limit columns 20, the block 17, the rotating column 9, the connecting plate 10, the guide column 15, the splicing block 24, the roller 6 and the spring 2 14 will return to the same state. Figure 1 The state shown is fixed, and the edge of the roller 6 is also at the half of the brake shoe body 5, and the edge of the roller 6 extends forward a short distance from the half of the brake shoe body 5. With the continuous use of the brake shoe body 5, the brake shoe body 5 will be worn thinner and thinner. When the brake shoe body 5 is worn to the point where its friction surface is behind the edge of the roller 6, when the brake shoe support body 4 is driven by the existing brake beam to move toward the wheel direction of the railway vehicle (the parts connected to the brake shoe support body 4 will move toward the wheel direction together), the roller 6 will first contact the wheel, and when the brake shoe body 5 is tightly fitted with the wheel, the position of the roller 6 relative to the wheel remains unchanged, and the block 17 will move on the outer wall of the guide column 15 toward the wheel direction and squeeze the spring 2 14, and the block 17 will drive the touch switch 21 to contact the contact plate 13 at the rear end of the guide column 15 (the distance between the touch switch 21 and the contact plate 13 is very small), thereby turning on the touch switch 21 and letting the warning light 19 emit a warning light.

[0031] It should be noted that since the edge of the roller 6 initially extends forward a short distance from the half of the brake shoe body 5, the wear of the brake shoe body 5 at this time has not exceeded half, and there is enough time for the staff to react, that is, when the railway vehicle stops operating, the braking system is started to drive all the brake shoe support bodies 4 to drive the brake shoe bodies 5 to fit with the corresponding wheels. Then, by observing where the warning light is emitted, it can be determined which brake shoe body 5 needs to be replaced in time, avoiding misjudgment caused by the staff observing the degree of wear of the brake shoe body 5 by themselves, and avoiding the problem of premature replacement and untimely replacement of the brake shoe body 5.

[0032] It is worth mentioning that, by setting four support columns 25 and four springs three 26, the concave block 22 and the splicing block 24 are elastically connected, and the roller 6 is rotatably connected to the inner concave surface of the concave block 22. Then, under the action of the four springs three 26, the collision between the roller 6 and the railway vehicle wheel can be buffered to a certain extent, and when the wheel continues to rotate, the roller 6 will rotate on the inner concave surface of the concave block 22, reducing the friction between the roller 6 and the railway vehicle wheel, thereby increasing the service life of the roller 6.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake shoe support and brake shoe fixing mechanism, comprising a brake shoe support body (4), characterized in that: The inner arc surface of the brake shoe support body (4) is fitted with the brake shoe body (5), and the outer arc surface of the brake shoe support body (4) is symmetrically fixedly connected with a mounting plate (2), wherein a fixing mechanism and a warning mechanism are respectively provided on one side wall of the mounting plate (2); The warning mechanism comprises a rotating column (9) rotatably connected to a side wall of the mounting plate (2); an end of the rotating column (9) away from the mounting plate (2) is fixedly connected to a vertical plate (7); a side wall of the vertical plate (7) away from the rotating column (9) is fixedly connected to a block (17); a limiting mechanism is provided between the vertical plate (7) and the mounting plate (2); a guide column (15) is slidably inserted through the inner wall of the block (17); a splicing block (24) is fixedly connected to the front end of the guide column (15); a roller (6) is rotatably provided in front of the splicing block (24) through an elastic component; a second spring (14) is fixedly connected between the splicing block (24) and the block (17); the second spring (14) is slidably sleeved on the outer wall of the guide column (15); and a light-emitting mechanism is provided between the rear end of the guide column (15) and the block (17).

2. The brake shoe support and brake shoe fixing mechanism according to claim 1, characterized in that: The fixing mechanism comprises a U-shaped block (31), the U-shaped block (31) being fixedly connected to a side wall of the mounting plate (2) near the upper edge, the U-shaped block (31) being close to the brake shoe body (5), and a latch (32) being slidably inserted through the inner wall of the U-shaped block (31), the lower end of the latch (32) being slidably inserted into the middle inner walls of the brake shoe support body (4) and the brake shoe body (5) in sequence, and a fixing ring (29) being fixedly sleeved on the outer wall of the latch (32), the lower end of the fixing ring (29) being in contact with the middle outer wall of the brake shoe support body (4), and a spring four (30) being rotatably connected between the fixing ring (29) and the U-shaped block (31), the spring four (30) being slidably sleeved on the outer wall of the latch (32), and a supporting assembly being provided between the upper end of the latch (32) and the mounting plate (2).

3. The brake shoe support and brake shoe fixing mechanism according to claim 2, characterized in that: The supporting assembly comprises a support block (33) and a pull plate (28); the support block (33) is fixedly connected to the side wall of the mounting plate (2), and the support block (33) is located directly above the U-shaped block (31); the pull plate (28) is fixedly connected to the upper end of the latch (32), and a groove (27) is provided at the upper end of the pull plate (28) corresponding to the support block (33).

4. The brake shoe support and brake shoe fixing mechanism according to claim 1, characterized in that: The limiting mechanism comprises two limiting columns (20) and four holes (8), the two limiting columns (20) are respectively slidably inserted into the inner wall at the upper and lower edges of the vertical plate (7), and the ends of the two limiting columns (20) away from the mounting plate (2) are commonly fixedly connected with a pulling column (16), and the outer walls of the two limiting columns (20) away from the pulling column (16) are commonly slidably sleeved with a connecting plate (10), the connecting plate (10) is fixedly sleeved on the outer wall of the rotating column (9), and the connecting plate (10) and the mounting plate (2) are in contact with each other, the four holes (8) are arranged on one side wall of the mounting plate (2) in a central annular array around the rotating column (9), the other ends of the two limiting columns (20) are respectively slidably matched with two of the holes (8), and elastic components are provided between the two limiting columns (20) and the vertical plate (7).

5. The brake shoe support and brake shoe fixing mechanism according to claim 4, characterized in that: The elastic component comprises a connecting ring (11), the connecting ring (11) being fixedly sleeved on the outer wall of the limiting column (20), and the connecting ring (11) being located between the vertical plate (7) and the connecting plate (10), and a spring 1 (12) being fixedly connected between the connecting ring (11) and the vertical plate (7), and the spring 1 (12) being slidably sleeved on the outer wall of the limiting column (20).

6. The brake shoe support and brake shoe fixing mechanism according to claim 1, characterized in that: The elastic component comprises four support columns (25), the four support columns (25) are respectively slidably inserted into the inner walls at the four corners of the splicing block (24), and the front ends of the four support columns (25) are commonly fixedly connected to a concave block (22), the wheel axle of the roller (6) is rotatably connected to the inner concave surface of the concave block (22), four springs (26) are fixedly connected between the concave block (22) and the splicing block (24), the four springs (26) are respectively slidably sleeved on the outer walls of the four support columns (25), and the rear ends of the four support columns (25) are all fixedly connected to a limiting disk (23), and the four limiting disks (23) are in contact with the splicing block (24).

7. The brake shoe support and brake shoe fixing mechanism according to claim 1, characterized in that: The light-emitting mechanism comprises an L-shaped plate (18) and a touch plate (13); the L-shaped plate (18) is fixedly connected to the front end of the block (17); a warning light (19) and a fixing column (34) are fixedly mounted on the vertical walls of the L-shaped plate (18); an end of the fixing column (34) away from the L-shaped plate (18) is fixedly connected to a touch switch (21); the touch switch (21) and the warning light (19) are electrically connected; the touch plate (13) is fixedly connected to the rear end of the guide column (15); the touch plate (13) and the block (17) are in close contact with each other; and the front end of the touch plate (13) is close to the rear end of the touch switch (21).

8. The brake shoe support and brake shoe fixing mechanism according to claim 1, characterized in that: The side walls of the two mounting plates (2) are provided with mounting holes (1) at locations away from the brake shoe body (5), and a limiting plate (3) is fixedly connected to a side wall of the brake shoe support body (4) away from the rotating column (9), and the limiting plate (3) is in close contact with the brake shoe body (5).

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