Novel drum brake

Abstract

The novel drum brake comprises a brake drum, a brake shoe and a brake pad, a reset spring and mounting rods are arranged at the upper end of the interior of the brake drum, the mounting rods are fixedly connected to the upper end and the lower end of the inner side of the brake pad respectively, and the outer surfaces of the mounting rods are in threaded connection with mounting caps used for limiting. The mounting rod and the mounting cap drive the brake pad and the brake shoe to form a dismounting structure, the connecting mechanisms are symmetrically arranged at the left end and the right end of the reset spring, and each connecting mechanism is composed of a connecting rod, a connecting column, a connecting block and a connecting ring. According to the novel drum brake, the brake pad can be detached and replaced very conveniently, in the long-term use process of the reset spring, when the elastic performance of the reset spring is weakened, the reset spring can be stretched and adjusted through the arrangement of the connecting mechanism, the tension of the reset spring is changed, and therefore it is guaranteed that the brake shoe and the brake pad can reset in time.

Description

Technical Field

[0001] The utility model relates to the technical field related to drum brakes, in particular to a novel drum brake. Background Art

[0002] Drum brakes are a type of brake that utilizes a brake transmission mechanism to cause the brake shoe to press the brake friction pad against the inner side of the brake drum, thereby generating braking force to decelerate the vehicle wheels or stop the vehicle in a short time and distance. They ensure driving safety and have the advantages of high braking efficiency, low cost, and easy installation, making them widely used.

[0003] For example, Publication No. CN206874705U discloses a novel drum brake comprising a piston, a rubber pad, a piston shoe cross plate, a rotation pin through hole, a piston shoe vertical plate, a wheel cylinder, a friction plate, a rotation pin, and a brake drum. The brake drum is characterized in that a piston is fixedly mounted on the top of the piston shoe cross plate, a rubber pad is sleeved on the lower portion of the piston, and a piston shoe vertical plate is fixedly mounted on the side of the piston shoe cross plate. The piston, the piston shoe cross plate, and the piston shoe vertical plate constitute a piston shoe, and a rotation pin through hole is provided on the lower portion of the piston shoe cross plate. A piston shoe and a friction plate are respectively mounted on both sides of the wheel cylinder. The friction plate is fixedly mounted on the side of the piston shoe vertical plate of the piston shoe and is located on the inner side of the brake drum. The piston on the piston shoe is mounted in the cylinder barrel of the wheel cylinder.

[0004] However, the prior art has problems such as the brake pads being worn out and requiring replacement during long-term use, which is inconvenient to replace. In addition, the elasticity of the return spring decreases during long-term use, making it inconvenient to adjust the tension of the return spring. For example, the comparative patents listed above have such problems.

[0005] For this reason, we propose a new type of drum brake to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a new drum brake to solve the problems in the prior art proposed in the above background technology, such as the brake pads will wear out during long-term use and need to be replaced, but the replacement operation of the brake pads is relatively inconvenient, and the elastic performance of the return spring will decrease during long-term use, making it inconvenient to adjust the tension of the return spring.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a novel drum brake, comprising a brake drum, a brake shoe and a brake pad;

[0008] Wherein, a return spring is provided at the upper end inside the brake drum;

[0009] Also includes:

[0010] Mounting rods, the mounting rods are fixedly connected to the upper and lower ends of the inner side of the brake pad, and the outer surface of the mounting rods is threadedly connected to a mounting cap for limiting position, and the mounting rods together with the mounting caps drive the brake pad and the brake shoe to form a disassembly structure;

[0011] The connecting mechanism is symmetrically arranged at the left and right ends of the return spring, and the connecting mechanism consists of a connecting rod, a connecting column, a connecting block and a connecting ring.

[0012] Preferably, a plurality of mounting holes are provided in the middle of the brake drum.

[0013] Preferably, a wear-resistant plate is fixedly connected to the inner wall of the brake drum, and brake shoes are hingedly connected to the left and right sides of the lower end of the brake drum. A torsion spring is provided at the connection between the brake shoe and the brake drum, and the upper end of the brake shoe is connected to the output end of the brake cylinder.

[0014] Preferably, the outer side of the brake shoe is fitted with the brake pad, and the brake pad drives the mounting rod to be respectively engaged with the upper and lower ends of the brake shoe, and the upper and lower ends of the inner side of the brake shoe are provided with mounting grooves for limiting.

[0015] Preferably, the mounting cap is snap-connected in the mounting groove.

[0016] Preferably, the connecting rod is fixedly connected to the inner side of the upper end of the brake shoe, and the outer side of the connecting rod is threadedly connected to a connecting column for adjustment. The connecting column is rotatably connected to a connecting block on the side close to the return spring, and the inner side of the connecting block is fixedly connected to a connecting ring.

[0017] Preferably, the connecting ring is connected to the movable end of the return spring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: when the brake pads of the new drum brake are worn and need to be replaced, the brake pads can be easily disassembled and replaced by means of the mounting rod and the mounting cap. Moreover, when the elastic performance of the return spring weakens during long-term use, the connection mechanism can be used to stretch and adjust the return spring to change the tension, thereby ensuring that the brake shoe and the brake pad can be reset in time.

[0019] 1. Equipped with wear-resistant plates, brake shoes and brake pads. The brake shoes rotate on the brake drum, driving the brake pads and brake shoes to contact and generate friction to achieve the braking effect;

[0020] 2. A mounting rod and a mounting cap are provided. The mounting cap is threadedly connected to the outer surface of the mounting rod. The arrangement of the mounting rod and the mounting cap facilitates the disassembly and replacement of the brake pads.

[0021] 3. A connecting mechanism is provided, which includes a connecting rod, a connecting column, a connecting block and a connecting ring. Through the setting of the connecting mechanism, when the elastic performance of the reset spring decreases, it can be stretched and adjusted, thereby ensuring that the reset spring can drive the brake shoe to reset normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0024] Figure 3 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the brake shoe, brake pad, mounting rod and mounting cap of the utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the return spring, connecting block and connecting column of the utility model;

[0027] Figure 6 This is a schematic diagram of the overall structure of the connecting mechanism of the utility model.

[0028] In the figure: 1. Brake drum; 2. Mounting hole; 3. Wear-resistant plate; 4. Brake shoe; 5. Brake pad; 6. Mounting rod; 7. Mounting cap; 8. Mounting slot; 9. Brake cylinder; 10. Return spring; 11. Connecting mechanism; 12. Connecting rod; 13. Connecting column; 14. Connecting block; 15. Connecting ring. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figures 1-6 , the utility model provides the following technical solutions.

[0031] Embodiment 1: In order to solve the problem in the prior art that the brake pad 5 will wear out during long-term use and needs to be replaced, and the replacement operation of the brake pad 5 is relatively inconvenient, this embodiment adopts the following technical scheme: a new drum brake is provided with a brake drum 1, a mounting hole 2, a wear-resistant pad 3, a brake shoe 4, a brake pad 5, a mounting rod 6, a mounting cap 7, a mounting groove 8, a brake cylinder 9 and a return spring 10. A plurality of mounting holes 2 are opened in the middle of the brake drum 1, and a return spring 10 is provided at the upper end of the interior of the brake drum 1. The mounting rod 6 is fixedly connected to the upper and lower ends of the inner side of the brake pad 5, and the outer surface of the mounting rod 6 is threadedly connected with a thread for limiting The mounting cap 7 is in the position, and the mounting rod 6 together with the mounting cap 7 drives the brake pad 5 and the brake shoe 4 to form a disassembly structure. The inner wall of the brake drum 1 is fixedly connected with a wear-resistant plate 3, and the left and right sides of the lower end of the brake drum 1 are hinged with brake shoes 4. The connection between the brake shoe 4 and the brake drum 1 is provided with a torsion spring. The upper end of the brake shoe 4 is connected to the output end of the brake cylinder 9. The outer side of the brake shoe 4 is fitted with the brake pad 5, and the brake pad 5 drives the mounting rod 6 to be respectively engaged and connected to the upper and lower ends of the brake shoe 4. The upper and lower ends of the inner side of the brake shoe 4 are provided with mounting grooves 8 for limiting. The mounting cap 7 is engaged and connected in the mounting groove 8. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, during use, the automobile braking system drives the brake cylinder 9 to start, so that the brake cylinder 9 pushes the brake shoe 4 to rotate at the bottom of the brake drum 1, and the brake shoe 4 drives the brake pad 5 to flip, so that the brake pad 5 contacts the brake shoe 4, thereby braking the wheel together with the brake drum 1 to achieve the braking effect. At the same time, during the flipping process of the brake shoe 4, the torsion spring at the connection between the brake shoe 4 and the brake drum 1 undergoes elastic deformation, and the brake shoe 4 drives the return spring 10 to stretch, so that the return spring 10 undergoes elastic deformation. When the brake is released, due to the return spring The spring 10 and the torsion spring restore their elastic deformation, driving the brake shoe 4 and the brake pad 5 to reset, releasing the brake on the brake drum 1 and the wheel. At this time, when the brake pad 5 is worn, the mounting cap 7 threadedly connected to the outer surface of the mounting rod 6 can be rotated, and the mounting cap 7 can be removed from the mounting groove 8, and the mounting cap 7 can be disengaged from the mounting rod 6, thereby releasing the limit between the brake pad 5 and the brake shoe 4, and then directly pulling the mounting rod 6, the mounting rod 6 together with the brake pad 5 and the brake shoe 4 can be disengaged, so that the mounting rod 6 can be disassembled and replaced very quickly and conveniently.

[0032] Example 2: In order to solve the problem in the prior art that the elastic performance of the return spring 10 will decrease during long-term use, and it is inconvenient to adjust the tension of the return spring 10, this embodiment adopts the following technical solution: a new drum brake is provided with a connecting mechanism 11, and the connecting mechanism 11 is symmetrically arranged at the left and right ends of the return spring 10, and the connecting mechanism 11 is composed of a connecting rod 12, a connecting column 13, a connecting block 14 and a connecting ring 15. The connecting rod 12 is fixedly connected to the inner side of the upper end of the brake shoe 4, and the outer side of the connecting rod 12 is threadedly connected to the connecting column 13 for adjustment. The connecting column 13 is rotatably connected to the connecting block 14 on the side close to the return spring 10, and the inner side of the connecting block 14 is fixedly connected to the connecting ring 15, and the connecting ring 15 is connected to the movable end of the return spring 10, as shown in FIG. Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, when the elastic performance of the return spring 10 weakens during long-term use, the connecting column 13 threadedly connected to the outer surface of the connecting rod 12 can be rotated, and the connecting column 13 can be moved to the side close to the brake shoe 4. The connecting column 13 and the connecting block 14 are rotated, and the connecting column 13 together with the connecting block 14 and the connecting ring 15 perform a stretching operation on the return spring 10, thereby being able to stretch and adjust the return spring 10 to prevent the normal reset of the brake shoe 4 from being affected due to the decline in elastic performance due to long-term use.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel drum brake comprising a brake drum (1), a brake shoe (4) and a brake pad (5); in, A return spring (10) is provided at the upper end inside the brake drum (1); It is characterized by further comprising: A mounting rod (6), wherein the mounting rod (6) is fixedly connected to the upper and lower ends of the inner side of the brake pad (5), and the outer surface of the mounting rod (6) is threadedly connected to a mounting cap (7) for limiting the position, and the mounting rod (6) together with the mounting cap (7) drives the brake pad (5) and the brake shoe (4) to form a disassembly structure; A connecting mechanism (11) is symmetrically arranged at the left and right ends of the return spring (10), and the connecting mechanism (11) is composed of a connecting rod (12), a connecting column (13), a connecting block (14) and a connecting ring (15).

2. A novel drum brake according to claim 1, characterized in that: A plurality of mounting holes (2) are provided in the middle of the brake drum (1).

3. A novel drum brake according to claim 1, characterized in that: A wear-resistant plate (3) is fixedly connected to the inner wall of the brake drum (1), and brake shoes (4) are hingedly connected to the left and right sides of the lower end of the brake drum (1). A torsion spring is provided at the connection between the brake shoe (4) and the brake drum (1), and the upper end of the brake shoe (4) is connected to the output end of the brake cylinder (9).

4. A novel drum brake according to claim 3, characterized in that: The outer side of the brake shoe (4) is fitted with the brake pad (5), and the brake pad (5) drives the mounting rod (6) to be respectively engaged with the upper and lower ends of the brake shoe (4), and the upper and lower ends of the inner side of the brake shoe (4) are both provided with mounting grooves (8) for limiting.

5. A novel drum brake according to claim 4, characterized in that: The mounting cap (7) is snap-connected in the mounting groove (8).

6. A novel drum brake according to claim 1, characterized in that: The connecting rod (12) is fixedly connected to the inner side of the upper end of the brake shoe (4), and the outer side of the connecting rod (12) is threadedly connected to a connecting column (13) for adjustment. The connecting column (13) is rotatably connected to a connecting block (14) on a side close to the return spring (10), and the inner side of the connecting block (14) is fixedly connected to a connecting ring (15).

7. A novel drum brake according to claim 6, characterized in that: The connecting ring (15) is connected to the movable end of the return spring (10).

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