Limiting adjusting mechanism for wedge brake
By designing a limit adjustment mechanism for wedge brakes, including push rod assembly and brake self-adjustment assembly, the locking problem caused by the reduction of the wedge brakes after returning to position is solved, and the reliability and safety of the brakes are improved.
Patent Information
- Application Number
- CN202421954919.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-11-22
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The deformation of the existing wedge brake collar hoof is greater than that of the subordinate hoof, which leads to the need to adjust the gap after returning to position, the gap becomes smaller, and locking occurs, which is a certain risk.
A limit adjustment mechanism for a wedge brake is designed, including a push rod assembly and a brake self-adjustment assembly. Through the pushing and return spring of the push rod assembly, the movement of the wedge block and the adjustment piston are realized, and the position of the screw is adjusted, thereby realizing the complete steps of brake braking and release.
Through this limit adjustment mechanism, wear of the collar hooves is reduced, locking situations caused by the decrease in gap are avoided, and the reliability and safety of the brakes are improved.
Smart Images
Figure CN222836122U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of limit adjustment of brakes, in particular to a limit adjustment mechanism for wedge-type brakes. Background Art
[0002] The limit adjustment mechanism of the wedge brake is used to control the position and clearance of the brake wedge to ensure the normal operation and safety performance of the brake. It is usually composed of a wedge, an adjustment bolt and an adjustment rod. The adjustment bolt is a key part connecting the wedge and the adjustment rod. The position and clearance of the wedge can be adjusted by rotating the adjustment bolt. The adjustment bolt is generally threaded, which can be fine-tuned and precisely controlled. The adjustment bolt is also usually equipped with a locking device to fix the position of the bolt to prevent misadjustment during use. It should be noted that when making limit adjustments, the position and clearance of the wedge should be correctly adjusted according to the guidance and requirements of the brake manufacturer to ensure that the performance of the brake meets the design requirements and ensure the driving safety of the vehicle.
[0003] The existing wedge brake structure is to push out the brake and adjust the gap when returning. The wedge brake also adopts the leading shoe structure. After braking, the wedge cylinder pushes out the leading shoe and the following shoe directly contacts the drum. The wedge cylinder is a floating structure. Due to the characteristics of the car in driving, the wedge brake often works on the leading shoe when it is pushed out. The rigidity of the drum causes the deformation of the leading shoe to be greater than the deformation of the following shoe. After returning, the leading shoe continuously adjusts the gap between the leading shoe and the following shoe to become smaller and smaller, causing locking.
[0004] Therefore, there is an urgent need to provide a limit adjustment mechanism for a wedge brake to solve the above problems. Utility Model Content
[0005] The technical problem to be solved by the utility model is that the deformation of the leading shoe of the existing wedge-type brake is greater than that of the trailing shoe, so that the gap needs to be adjusted after returning to the original position, resulting in a smaller gap and a locking situation, which is dangerous.
[0006] To solve the above technical problems, a technical solution adopted by the utility model is: to provide a limit adjustment mechanism for a wedge brake, including a push rod assembly, a wedge cylinder is installed at the bottom of the push rod assembly, and a brake self-adjusting assembly is installed inside the wedge cylinder.
[0007] The utility model is further configured as follows: the push rod assembly includes a push rod fixedly connected to the top of the wedge-type cylinder, a retaining spring movably connected to the outer wall of the push rod, a spring baffle fixedly connected to the top of the retaining spring, a return spring fixedly connected to the top of the spring baffle, a first dust cover fixedly connected to the bottom of the return spring, a retaining ring fixedly connected to the bottom of the first dust cover, a retaining ring fixedly connected to the bottom of a retaining frame, rollers rollingly connected to both sides of the retaining frame, and a limit screw is provided inside the wedge-type cylinder.
[0008] Through the above technical solution, under the push of the external air chamber, the push rod is pushed downward, driving the roller to move from top to bottom. Since the roller moves from top to bottom, the roller moves along the lowest point of the inclined block on the wedge block to the highest point, acting on the brake self-adjusting component to push it to both sides, thereby realizing braking.
[0009] The utility model is further configured as follows: the return spring surrounds the outer wall of the push rod.
[0010] Through the above technical solution, under the external push, the transmission to the inside can make the roller inside the wedge cylinder move, and the corresponding changes can be achieved in the extrusion of the return spring, thereby completing the basic function of the limiting mechanism.
[0011] The utility model is further configured as follows: the wedge cylinder includes a wedge block, the wedge block is located on the other side of the entire mechanism, one side of the wedge block is fixedly connected to a flat steel wire retaining spring, one side of the flat steel wire retaining spring is fixedly connected to a rectangular spring, one side of the rectangular spring is fixedly connected to a limiting sleeve, one side of the limiting sleeve is fixedly connected to a steel wire retaining ring for a hole, one side of the steel wire retaining ring for the hole is fixedly connected to an adjusting piston, one side of the adjusting piston is movably connected to an adjusting ring, one side of the adjusting ring is fixedly connected to a compression spring, and one side of the compression spring is fixedly connected to a butterfly retaining spring.
[0012] Through the above technical solution, the push rod assembly pushes the wedge block, and the brake self-adjusting assembly is pushed out to both sides respectively. The wedge block inside the brake self-adjusting assembly drives the adjusting piston, adjusting screw and anti-rotation clamp to be pushed out. The adjusting piston is pushed out and drives the adjusting ring. The adjusting ring compresses the compression spring and rotates along the helical teeth of the adjusting piston, so that the brake can be braked.
[0013] The utility model is further configured as follows: the compression spring is located inside the butterfly retaining spring.
[0014] Through the above technical solution, the components in the wedge cylinder are linked so that the peripheral components are pushed, and after the corresponding adjustment is made on the adjustment piston, the adjustment ring will be driven to move accordingly, thereby realizing the complete movement of the brake.
[0015] The utility model is further configured as follows: the brake self-adjusting component includes a second dust cover arranged on one side of the butterfly spring, one side of the second dust cover is fixedly connected to an anti-rotation clamp, and one side of the anti-rotation clamp is provided with an adjusting screw.
[0016] Through the above technical scheme, the roller returns to its original position driven by the return spring, and the brake self-adjusting assembly returns to the middle from both sides under the action of the lead shoe return spring. The wedge adjustment piston, the adjustment screw and the anti-rotation clamp return from both sides to the middle, and the adjustment piston drives the adjustment ring when returning. The adjustment ring returns to the inclined surface of the cylinder body under the elastic force of the compression spring. Since the adjustment ring is in hard contact with the inclined surface, the adjustment ring does not rotate, the adjusting piston rotates r degrees along the bevel teeth, the adjusting screw does not move, the adjusting piston rotates, and the adjusting screw is pushed out by / °×rmm, thereby achieving the self-adjusting function and realizing the complete steps of brake release.
[0017] The utility model is further configured as follows: the inner wall of the second dust cover is fixedly connected to the outer wall of the wedge-type cylinder.
[0018] Through the above technical solution, during the braking process, the adjustment ring in the wedge cylinder remains in a non-moving state in the compression spring, and the piston is adjusted to rotate to a corresponding angle, and the function is completed according to the corresponding calculation formula.
[0019] The beneficial effects of the utility model are as follows:
[0020] 1. The utility model adopts a simple design of a wedge-shaped cylinder and a brake self-adjusting assembly, so that when the wedge-shaped cylinder is braking, after a part of the brake is transmitted to the leading shoe, it will be dispersed to other parts, thereby reducing the phenomenon that the leading shoe is worn out and the following shoe is not worn out;
[0021] 2. The utility model designs a simple push rod assembly, which can be transmitted downward when braking, so that the screw pushes the slave shoe to perfectly achieve braking. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is the front view of the utility model;
[0023] Figure 2 It is a cross-sectional view of the utility model;
[0024] Figure 3 It is a partial structural schematic diagram of the utility model.
[0025] In the figure: 1. Push rod assembly; 11. Push rod; 12. Circlip; 13. Spring stopper; 14. Return spring; 15. First dust cover; 16. Circlip; 17. Retaining frame; 18. Roller; 19. Limit screw; 2. Wedge cylinder; 21. Wedge block; 22. Flat steel wire circlip; 23. Rectangular spring; 24. Limit sleeve; 25. Steel wire circlip for hole; 26. Adjusting piston; 27. Adjusting ring; 28. Compression spring; 29. Butterfly circlip; 3. Brake self-adjusting assembly; 31. Second dust cover; 32. Anti-rotation clamp; 33. Adjusting screw. DETAILED DESCRIPTION
[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0027] See also Figure 1-Figure 3 A limit adjustment mechanism for a wedge brake comprises a push rod assembly 1, the push rod assembly 1 comprises a push rod 11 fixedly connected to the top of a wedge cylinder 2, a retaining ring 12 is movably connected to the outer wall of the push rod 11, a spring stopper 13 is fixedly connected to the top of the retaining ring 12, a return spring 14 is fixedly connected to the top of the spring stopper 13, a first dust cover 15 is fixedly connected to the bottom of the return spring 14, a retaining ring 16 is fixedly connected to the bottom of the first dust cover 15, a retaining frame 17 is fixedly connected to the bottom of the retaining ring 16, and the retaining frame 17 is fixedly connected to the bottom of the retaining frame 17. Rollers 18 are connected in a rolling manner on both sides, and a limit screw 19 is arranged inside the wedge-type cylinder 2. Under the push of the external air chamber, the push rod 11 is pushed downward, driving the roller 18 to move from top to bottom. As the roller 18 moves from top to bottom, the roller 18 moves along the lowest point of the inclined block on the wedge block 21 to the highest point, and acts on the brake self-adjusting component 3 to push out to both sides, thereby achieving braking. The return spring 14 surrounds the outer wall of the push rod 11. Under the push of the outside, the transfer to the inside can make the roller 18 inside the wedge-type cylinder 2 move, and the corresponding changes can be achieved in the squeezing of the return spring 14, thereby completing the basic function of the limit mechanism;
[0028] like Figure 3 As shown, a wedge cylinder 2 is installed at the bottom of the push rod assembly 1, and the wedge cylinder 2 includes a wedge block 21. The wedge block 21 is located on the other side of the entire mechanism. A flat steel wire retaining spring 22 is fixedly connected to one side of the wedge block 21, and a rectangular spring 23 is fixedly connected to one side of the flat steel wire retaining spring 22. A limited sleeve 24 is fixedly connected to one side of the rectangular spring 23, and a hole wire retaining ring 25 is fixedly connected to one side of the limited sleeve 24. An adjusting piston 26 is fixedly connected to one side of the hole wire retaining ring 25. An adjusting ring 27 is movably connected to one side of the adjusting piston 26. A compression spring 28 is fixedly connected to one side of the adjusting ring 27, and a butterfly retaining spring 29 is fixedly connected to one side of the compression spring 28. The push rod assembly 1 pushes The wedge block 21 is moved, and the brake self-adjusting assembly 3 is pushed out to both sides respectively. The wedge block 21 inside the brake self-adjusting assembly 3 drives the adjusting piston 26, the adjusting screw 33, and the anti-rotation clamp 32 to be pushed out. The adjusting piston 26 is pushed out and drives the adjusting ring 27. The adjusting ring 27 compresses the compression spring 28. The adjusting ring 27 rotates along the helical teeth of the adjusting piston 26, so that the brake can be braked. The compression spring 28 is located inside the butterfly retaining spring 29. The linkage between the components in the wedge cylinder 2 makes the peripheral components push, and after the corresponding adjustment is made on the adjusting piston 26, it will drive the adjusting ring 27 to move accordingly, thereby realizing the complete movement of the brake.
[0029] like Figure 3As shown, a brake self-adjusting assembly 3 is installed inside the wedge cylinder 2, and the brake self-adjusting assembly 3 includes a second dust cover 31 arranged on one side of the butterfly spring 29, and an anti-rotation clamp 32 is fixedly connected to one side of the second dust cover 31, and an adjusting screw 33 is arranged on one side of the anti-rotation clamp 32. The roller 18 returns to its original position under the drive of the return spring 14. Under the action of the return spring 14 of the collar shoe, the brake self-adjusting assembly 3, the wedge block 21 adjusts the piston 26, the adjusting screw 33, and the anti-rotation clamp 32 returns from both sides to the middle. When the adjusting piston 26 returns, it drives the adjusting ring 27, and the adjusting ring 27 returns to the cylinder under the elastic force of the compression spring 28. On the inclined surface of the body, because the adjusting ring 27 is in hard contact with the inclined surface, the adjusting ring 27 does not rotate, the adjusting piston 26 rotates r degrees along the bevel teeth, the adjusting screw 33 does not move, the adjusting piston 26 rotates, and the adjusting screw 33 is pushed out 1 / 360°×rmm, achieving the self-adjusting function and realizing the complete steps of brake release. The inner wall of the second dust cover 31 is fixedly connected to the outer wall of the wedge cylinder 2. During the braking process, the adjusting ring 27 in the wedge cylinder 2 remains in a non-moving state in the compression spring 28, and the adjusting piston 26 rotates a corresponding angle to complete the function according to the corresponding calculation formula.
[0030] When the utility model is in use, under the push of the external air chamber, the push rod 11 is pushed downward, driving the roller 18 to move from top to bottom. Since the roller 18 moves from top to bottom, the roller 18 moves along the lowest point of the inclined block on the wedge block 21 to the highest point, acting on the brake self-adjusting component 3 to push out to both sides, the push rod component 1 pushes the wedge block 21, and the brake self-adjusting component 3 is pushed out to both sides respectively. The wedge block 21 inside the brake self-adjusting component 3 drives the adjusting piston 26, the adjusting screw 33, and the anti-rotation clamp 32 to be pushed out. The adjusting piston 26 is pushed out and drives the adjusting ring 27. The adjusting ring 27 compresses the compression spring 28, and the adjusting ring 27 rotates along the helical teeth of the adjusting piston 26.
[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A limit adjustment mechanism for a wedge brake, comprising a push rod assembly (1), characterized in that: A wedge-type cylinder (2) is installed at the bottom of the push rod assembly (1), and a brake self-adjusting assembly (3) is installed inside the wedge-type cylinder (2).
2. A limit adjustment mechanism for a wedge brake according to claim 1, characterized in that: The push rod assembly (1) comprises a push rod (11) fixedly connected to the top of a wedge-shaped cylinder (2); a retaining spring (12) is movably connected to the outer wall of the push rod (11); a spring baffle (13) is fixedly connected to the top of the retaining spring (12); a return spring (14) is fixedly connected to the top of the spring baffle (13); a first dust cover (15) is fixedly connected to the bottom of the return spring (14); a retaining ring (16) is fixedly connected to the bottom of the first dust cover (15); a retaining frame (17) is fixedly connected to the bottom of the retaining ring (16); rollers (18) are rotatably connected to both sides of the retaining frame (17); and a limit screw (19) is provided inside the wedge-shaped cylinder (2).
3. A limit adjustment mechanism for a wedge brake according to claim 2, characterized in that: The return spring (14) surrounds the outer wall of the push rod (11).
4. The limit adjustment mechanism for a wedge brake according to claim 1, characterized in that: The wedge-type cylinder (2) comprises a wedge block (21), wherein the wedge block (21) is located at the other side of the entire mechanism, one side of the wedge block (21) is fixedly connected to a flat steel wire retaining spring (22), one side of the flat steel wire retaining spring (22) is fixedly connected to a rectangular spring (23), one side of the rectangular spring (23) is fixedly connected to a limiting sleeve (24), one side of the limiting sleeve (24) is fixedly connected to a hole steel wire retaining ring (25), one side of the hole steel wire retaining ring (25) is fixedly connected to an adjustment piston (26), one side of the adjustment piston (26) is movably connected to an adjustment ring (27), one side of the adjustment ring (27) is fixedly connected to a compression spring (28), and one side of the compression spring (28) is fixedly connected to a butterfly retaining spring (29).
5. A limit adjustment mechanism for a wedge brake according to claim 4, characterized in that: The compression spring (28) is located inside the butterfly circlip (29).
6. A limit adjustment mechanism for a wedge brake according to claim 5, characterized in that: The brake self-adjusting assembly (3) comprises a second dust cover (31) arranged on one side of the butterfly spring (29), an anti-rotation clamp (32) being fixedly connected to one side of the second dust cover (31), and an adjustment screw (33) being provided on one side of the anti-rotation clamp (32).
7. A limit adjustment mechanism for a wedge brake according to claim 6, characterized in that: The inner wall of the second dust cover (31) is fixedly connected to the outer wall of the wedge-shaped cylinder (2).