Automobile brake drum gap adjusting mechanism

Abstract

The utility model provides an automobile brake drum clearance adjusting mechanism, which relates to the technical field of automobile braking, and comprises a brake cover, a brake pad and a shoe, one end of the brake pad and one end of the shoe are both rotatably connected on the brake cover, a driving component is fixedly connected in the brake cover, an adjusting component is fixedly connected in the shoe, and the adjusting component is fixedly connected in the brake cover. The bottom end of the driving assembly is rotationally connected with a power assembly. The adjusting assembly comprises a worm wheel. By means of the design, automatic adjustment of the gap between the brake drum and the brake shoe is achieved, and it is guaranteed that the gap is always kept within a proper range. Along with abrasion of the brake pad, the adjusting assembly can automatically conduct compensation adjustment, the optimal contact state of the brake shoe and the brake drum is kept, the problem that due to gradual abrasion of the brake pad, a gap is enlarged is solved, and the situation that due to the fact that the contact area between the brake shoe and the brake drum is reduced, braking force is reduced is avoided. Therefore, the braking performance of the vehicle is effectively maintained, the braking distance is reduced, and the driving safety is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile braking, in particular to an automobile brake drum clearance adjustment mechanism. Background Art

[0002] Drum brake is a kind of automobile braking system, which mainly consists of a cylindrical drum and two brake shoes made of friction material. When the driver steps on the brake pedal, the brake shoes are pushed against the drum, generating friction to slow down or stop the car.

[0003] In some existing brake systems, the gap between the brake drum and brake shoe can't be automatically adjusted to maintain an appropriate range. Consequently, as the brake shoe wears, the gap gradually increases. This increased gap reduces the contact area between the brake shoe and the brake drum, which in turn reduces braking force. This directly impacts the vehicle's braking performance, increasing stopping distances and weakening braking effectiveness, increasing driving safety risks.

[0004] Therefore, the utility model provides a vehicle brake drum clearance adjustment mechanism. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and provide a vehicle brake drum clearance adjustment mechanism.

[0006] In order to achieve the above object, the utility model adopts the following technical solution: a vehicle brake drum clearance adjustment mechanism, comprising a brake cover, a brake pad and a shoe, wherein one end of the brake pad and the shoe are both rotatably connected to the brake cover, a driving assembly is fixedly connected to the interior of the brake cover, an adjusting assembly is fixedly connected to the interior of the shoe, and the bottom end of the driving assembly is rotatably connected to the power assembly;

[0007] The adjusting assembly includes a worm gear, both ends of the worm gear are fixedly connected to a screw rod, the outer side of the screw rod is threadedly connected to a moving column, the end of the moving column away from the screw rod is fixedly connected to a connecting disk, the outer side of the connecting disk is fixedly connected to a telescopic block, and the end of the connecting disk away from the moving column is fixedly connected to a return spring.

[0008] As a preferred embodiment, the drive assembly includes a mounting plate, the outer side of the mounting plate is fixedly connected to the brake cover, a cylinder is installed inside the mounting plate, the driving end of the cylinder is fixedly connected to a push block, and one end of the push block is fixedly connected to an eccentric wheel.

[0009] The technical effect of adopting the above technical solution is that the gap between the brake shoe and the drum can be automatically adjusted to ensure that the gap remains in an optimal state after the brake shoe is worn.

[0010] As a preferred embodiment, the power assembly includes a rotating shaft, the outer side of the rotating shaft is rotatably connected to the eccentric wheel, the outer side of the rotating shaft is fixedly connected to a telescopic rotating column, the end of the telescopic rotating column away from the rotating shaft is fixedly connected to a worm, and the end of the worm away from the telescopic rotating column is fixedly connected to a positioning rotating column.

[0011] The technical effect of adopting the above technical solution is: realizing the transmission and conversion of power, thereby driving the adjustment component to perform precise displacement adjustment.

[0012] As a preferred embodiment, both ends of the return spring are fixedly connected to the shoe.

[0013] The technical effect of adopting the above technical solution is to ensure that the brake shoe can return to its original position quickly when not in operation, thereby reducing the response time of the brake system.

[0014] As a preferred embodiment, the top end of the telescopic block is slidably connected to the mounting plate, and the outer side of the eccentric wheel is in contact with one end of the shoe.

[0015] The technical effect of adopting the above technical solution is to achieve automatic adjustment of the gap between the brake drum and the brake shoe.

[0016] As a preferred embodiment, the worm and the worm wheel are meshingly connected, and the end of the positioning column away from the worm is rotatably connected to the brake cover.

[0017] The technical effect of adopting the above technical solution is to ensure stable rotation during power transmission without reverse transmission.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] The eccentric wheel is designed to automatically adjust the gap between the brake drum and the brake shoe, thereby ensuring that the gap is always maintained within an appropriate range. As the brake shoe wears, the adjusting assembly can automatically compensate and adjust to maintain the optimal contact state between the brake shoe and the brake drum, thereby solving the problem of increased gap caused by gradual wear of the brake shoe and avoiding a decrease in braking force caused by a reduction in the contact area between the shoe and the brake drum. This effectively maintains the braking performance of the vehicle, reduces the braking distance and enhances driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a vehicle brake drum clearance adjustment mechanism provided by the utility model;

[0021] Figure 2 for Figure 1 A magnified view of point A in the figure;

[0022] Figure 3 This is a schematic diagram of the structure of a driving component of a vehicle brake drum clearance adjustment mechanism provided by the utility model;

[0023] Figure 4 The utility model provides a schematic structural diagram of an adjustment component of a vehicle brake drum clearance adjustment mechanism.

[0024] Legend:

[0025] 1. Brake cover;

[0026] 2. Drive assembly; 21. Mounting plate; 22. Cylinder; 23. Push block; 24. Eccentric wheel;

[0027] 3. Adjustment assembly; 31. Worm gear; 32. Screw; 33. Moving column; 34. Connecting plate; 35. Telescopic block; 36. Return spring;

[0028] 4. Power assembly; 41. Rotating shaft; 42. Telescopic rotating column; 43. Worm; 44. Positioning rotating column;

[0029] 5. Brake pads; 6. Brake shoes. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 1 - Figure 4 As shown, this embodiment provides a technical solution: a vehicle brake drum clearance adjustment mechanism, comprising a brake cover 1, a brake pad 5 and a shoe 6, one end of the brake pad 5 and the shoe 6 are both rotatably connected to the brake cover 1, the interior of the brake cover 1 is fixedly connected to a drive assembly 2, the interior of the shoe 6 is fixedly connected to an adjustment assembly 3, and the bottom end of the drive assembly 2 is rotatably connected to a power assembly 4;

[0032] One end of the brake pad 5 and the shoe 6 are both rotatably connected to the brake cover 1. This design can ensure that the brake pad 5 and the shoe 6 maintain a stable fulcrum during the braking process, ensuring smooth movement and force transmission during braking;

[0033] The adjusting assembly 3 includes a worm gear 31, both ends of the worm gear 31 are fixedly connected to a screw rod 32, the outer side of the screw rod 32 is threadedly connected to a moving column 33, the end of the moving column 33 away from the screw rod 32 is fixedly connected to a connecting disk 34, the outer side of the connecting disk 34 is fixedly connected to a telescopic block 35, and the end of the connecting disk 34 away from the moving column 33 is fixedly connected to a return spring 36, and both ends of the return spring 36 are fixedly connected to the shoe 6;

[0034] The worm gear 31 realizes automatic adjustment of the gap through the rotation of the screw rod 32. The outer side of the screw rod 32 is threadedly connected to a movable column 33. This threaded connection method ensures that the movable column 33 can move accurately when the screw rod 32 rotates, driving subtle changes in the gap adjustment. The connecting plate 34 serves as the hub of the transmission structure and is responsible for installing the return spring 36 while also ensuring the transmission of power. The design of the telescopic block 35 can enable the adjustment component 3 to remain on a stable motion trajectory during the movement and adjustment process. Both ends of the return spring 36 are fixedly connected to the shoe 6. The presence of the return spring 36 can ensure that the brake pad 5 and the shoe 6 can return to their original position quickly after the gap is adjusted, avoiding gap changes caused by long-term work, thereby ensuring the consistency and safety of the braking performance.

[0035] Furthermore, Figure 1 - Figure 3 As shown: the driving assembly 2 includes a mounting plate 21, the top of the telescopic block 35 is slidably connected to the mounting plate 21, the outer side of the mounting plate 21 is fixedly connected to the brake cover 1, the interior of the mounting plate 21 is equipped with a cylinder 22, the driving end of the cylinder 22 is fixedly connected to the pushing block 23, one end of the pushing block 23 is fixedly connected to the eccentric wheel 24, and the outer side of the eccentric wheel 24 is in contact with one end of the shoe 6;

[0036] The outer side of the mounting plate 21 is fixedly connected to the brake cover 1. Through this fixed connection method, the structure of the entire drive assembly 2 is more stable, avoiding position displacement due to mechanical vibration or external force during braking. The cylinder 22 provides a stable and controllable driving force. Through the action of the cylinder 22, the pushing block 23 can be realized. The pushing block 23 receives the thrust of the cylinder 22 and transmits it to the eccentric wheel 24. The design of the eccentric wheel 24 can convert the linear motion of the pushing block 23 into the torsional motion of the shoe 6, so that the brake pad 5 is in contact to achieve the braking effect.

[0037] The power assembly 4 includes a rotating shaft 41, the outer side of the rotating shaft 41 is rotatably connected to the eccentric wheel 24, the outer side of the rotating shaft 41 is fixedly connected to a telescopic rotating column 42, the end of the telescopic rotating column 42 away from the rotating shaft 41 is fixedly connected to a worm 43, the worm 43 is meshed with the worm wheel 31, the end of the worm 43 away from the telescopic rotating column 42 is fixedly connected to a positioning rotating column 44, and the end of the positioning rotating column 44 away from the worm 43 is rotatably connected to the brake cover 1;

[0038] The outer side of the rotating shaft 41 is connected to the eccentric wheel 24 in rotation, so that the power can be transmitted to the rotating shaft 41 through the rotation of the eccentric wheel 24. The telescopic rotating column 42 makes the entire system smoother during power transmission and avoids jamming. The worm 43 converts linear power into rotational power, and through the transmission structure of the worm 43 and worm wheel 31, it ensures that the worm 43 can drive the worm wheel 31 to make more precise adjustments when rotating, and the meshing connection between the worm wheel 31 and the worm 43 has a self-locking function, thereby maintaining a stable gap state after each adjustment. The design of the positioning rotating column 44 enables the worm 43 to maintain a precise positioning state while transmitting power, and will not be offset by external forces, ensuring the stability and precision of the entire power transmission system.

[0039] Working principle:

[0040] like Figure 1 - Figure 4 As shown:

[0041] When in use: when braking, the cylinder 22 will be started, which will drive the pushing block 23 to rotate. Due to the design of the eccentric wheel 24, the shoe 6 in contact with the eccentric wheel 24 will drive the brake pad 5 to rotate on the brake cover 1, and contact braking is performed through the brake pad 5. When the brake pad 5 is worn and thin, the arc of the shoe 6 moving outward will drive the adjusting component 3 to move to the top in a small range, meshing the worm gear 31 with the worm 43. When the worm gear 31 rotates, it drives the screw rod 32 to rotate on the moving column 33, so that the distance between the screw rod 32 and the moving column 33 is adjusted, and the telescopic block 35 will slide on the mounting plate 21 to ensure the stable adjustment of the adjusting component 3, realize the stable adjustment of the return spring 36, ensure the tension balance between the return spring 36 and the shoe 6, and always keep the position of the brake pad 5 within the appropriate braking range.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A brake drum clearance adjustment mechanism for an automobile, comprising a brake cover (1), a brake pad (5) and a shoe (6), wherein one end of each of the brake pad (5) and the shoe (6) is rotatably connected to the brake cover (1), and characterized in that: The brake cover (1) is fixedly connected to a driving assembly (2) inside, the shoe (6) is fixedly connected to an adjusting assembly (3) inside, and the bottom end of the driving assembly (2) is rotatably connected to a power assembly (4); The adjusting assembly (3) comprises a worm wheel (31), both ends of the worm wheel (31) are fixedly connected to a screw rod (32), the outer side of the screw rod (32) is threadedly connected to a moving column (33), the end of the moving column (33) away from the screw rod (32) is fixedly connected to a connecting disk (34), the outer side of the connecting disk (34) is fixedly connected to a telescopic block (35), and the end of the connecting disk (34) away from the moving column (33) is fixedly connected to a return spring (36).

2. The automobile brake drum clearance adjustment mechanism according to claim 1, characterized in that: The driving assembly (2) comprises a mounting plate (21), the outer side of the mounting plate (21) is fixedly connected to the brake cover (1), a cylinder (22) is installed inside the mounting plate (21), a driving end of the cylinder (22) is fixedly connected to a push block (23), and one end of the push block (23) is fixedly connected to an eccentric wheel (24).

3. The automobile brake drum clearance adjustment mechanism according to claim 2, characterized in that: The power assembly (4) comprises a rotating shaft (41), the outer side of the rotating shaft (41) is rotatably connected to the eccentric wheel (24), the outer side of the rotating shaft (41) is fixedly connected to a telescopic rotating column (42), the end of the telescopic rotating column (42) away from the rotating shaft (41) is fixedly connected to a worm (43), and the end of the worm (43) away from the telescopic rotating column (42) is fixedly connected to a positioning rotating column (44).

4. The automobile brake drum clearance adjustment mechanism according to claim 1, characterized in that: Both ends of the return spring (36) are fixedly connected to the shoe (6).

5. The automobile brake drum clearance adjustment mechanism according to claim 2, characterized in that: The top end of the telescopic block (35) is slidably connected to the mounting plate (21), and the outer side of the eccentric wheel (24) is in contact with one end of the shoe (6).

6. The automobile brake drum clearance adjustment mechanism according to claim 3, characterized in that: The worm (43) is meshingly connected to the worm wheel (31), and the end of the positioning column (44) away from the worm (43) is rotatably connected to the brake cover (1).

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