Bidirectional self-energizing drum brake

Abstract

The utility model relates to the technical field of automobile accessories, and discloses a bidirectional self-energizing drum brake which comprises a brake drum and two brake pads, a slot is formed in the rear end of the inner bottom wall of the brake drum, push blocks are connected to the two ends of the inner side of the slot in a sliding mode, and fixing rods are connected to the top ends of the two push blocks in a rotating mode. Through holes are formed in one ends of the two brake pads, one ends of the two fixing rods are slidably connected to the interiors of the through holes, fixing rings are slidably connected to the outer sides of the ends, away from the push blocks, of the two fixing rods, mounting grooves are formed in the front sides and the rear sides of the inner side walls of the two fixing rings, and fixing blocks are slidably connected to the interiors of the multiple mounting grooves. According to the brake pad fixing device, the fixing block retreats from the interior of the fixing groove, the fixing ring is taken down from the outer side of the fixing rod, then a worker can replace the brake pad, and when the brake pad needs to be fixed, the brake pad and the fixing ring can be reset, and the fixing block enters the fixing groove through the second spring.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a two-way self-energizing drum brake. Background Art

[0002] Drum brakes are a common braking system mainly used in cars, trucks and other motor vehicles. Compared with other braking systems, drum brakes have lower manufacturing costs and are suitable for most road vehicles.

[0003] After searching, the Chinese patent announcement number: CN213981739U discloses a two-way self-enhancing drum brake with an impact-type two-way lever self-adjusting mechanism. It includes a brake base assembly, a brake drum, a front shoe assembly, a rear shoe assembly, a rear wheel cylinder assembly, and a two-way lever self-adjusting mechanism. The rear wheel cylinder assembly is installed on the brake base assembly, and the front and rear shoe assemblies are installed on both sides of the brake base assembly. The front and rear shoe assemblies are connected to the shoe support pins of the brake base assembly. The lower ends of the front and rear shoe assemblies are indirectly connected to the lower end return spring and the two-way lever self-adjusting mechanism. The front and rear shoe assemblies are elastically connected to the two-way lever self-adjusting mechanism through the lower end return spring for self-adjustment of the gap; the two-way lever self-adjusting mechanism includes a center sleeve, a gap adjuster base, a gap adjustment plate mechanism, a compression spring assembly, and a ratchet rotation gap adjustment assembly. The utility model can automatically adjust the shoe-drum clearance in both directions, can adjust the shoe-drum clearance in real time and accurately, and avoids the inconvenience and inaccuracy of manual or unidirectional clearance adjustment. During the long-term use of the brake pad, the friction between the brake pad and the brake drum will often cause wear and tear, so the brake pad needs to be replaced. However, since the brake pad is directly installed inside the brake drum, it is not convenient for the staff to replace it. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a bidirectional self-energizing drum brake, which aims to improve the problem in the prior art that during the long-term use of the brake pad, the friction between the brake pad and the brake drum often causes wear and tear, so that the brake pad needs to be replaced, but because the brake pad is directly installed inside the brake drum, it is not convenient for the staff to replace it.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a two-way self-energizing drum brake, comprising a brake drum and two brake pads, the rear end of the inner bottom wall of the brake drum is provided with a groove, both ends of the inner side of the groove are slidably connected with push blocks, the tops of the two push blocks are rotatably connected with fixing rods, one end of the two brake pads is provided with a through hole, one end of the two fixing rods is slidably connected to the inside of the through hole, the outer sides of the ends of the two fixing rods away from the push blocks are slidably connected to fixing rings, the front and rear sides of the inner side walls of the two fixing rings are provided with mounting grooves, the interiors of multiple mounting grooves are slidably connected with fixing blocks, one end of multiple fixing blocks is fixedly connected with pull rods, and springs 2 are arranged on the outer sides of multiple pull rods, the front and rear sides of the ends of the two fixing rods away from the top of the push blocks are provided with fixing grooves, the ends of the multiple fixing blocks away from the pull rods are slidably connected to the inside of the fixing grooves, the middle parts of the adjacent sides of the two brake pads are fixedly connected with springs 1, and the inner bottom wall of the brake drum is provided with an adjustment mechanism.

[0006] Through the above technical solution: pull the pull rod to make the fixing block withdraw from the fixing groove, and pull the fixing ring upwards, so as to remove the fixing ring from the outside of the fixing rod.

[0007] As a further description of the above technical solution:

[0008] The adjustment mechanism comprises a scale which is fixedly connected to the middle of the inner bottom wall of the brake drum. A double-headed screw is rotatably connected inside the slot, and both ends of the double-headed screw are threadedly connected to the inside of the push block.

[0009] Through the above technical solution: the double-headed screw is rotated, the push block is pushed to move inside the slot by the rotation of the double-headed screw, and the movement of the push block drives the brake pad to move, so as to adjust the distance between the brake pad and the brake drum.

[0010] As a further description of the above technical solution:

[0011] One ends of the plurality of springs are all fixedly connected to the inner side wall of the installation groove, and the other ends of the plurality of springs are all fixedly connected to one end of the fixing block close to the pull rod.

[0012] Through the above technical solution: the new brake pad and the fixing ring are sequentially sleeved onto the outside of the fixing rod, and the fixing block is pushed into the fixing groove by the thrust of the second spring, so as to fix the brake pad.

[0013] As a further description of the above technical solution:

[0014] One side of the inner side wall of the two through holes is provided with a groove, and the inside of the two grooves is slidably connected with a positioning block, and one side of the two positioning blocks is fixedly connected to one side of the fixing rod.

[0015] Through the above technical solution: when the brake pad is sleeved onto the outer side of the fixing rod, the positioning block can be extended into the groove to preliminarily fix the brake pad.

[0016] As a further description of the above technical solution:

[0017] A mounting block is fixedly connected to the front end of the inner bottom wall of the brake drum, and a double-headed cylinder is fixedly connected to the top end of the mounting block. The double-headed cylinder is arranged at the front end of one side adjacent to two brake pads.

[0018] Through the above technical solution: the two brake pads are pushed to move to both sides by the double-headed cylinder, and are brought into contact with the inner wall of the brake drum so that the brake pads rub to brake the wheels.

[0019] As a further description of the above technical solution:

[0020] A dust cover is arranged at the top of the brake drum, a side plate is fixedly connected to the bottom of the dust cover, the other end of the side plate is arranged inside the brake drum, and limiting grooves are arranged on both sides of the side plate.

[0021] Through the above technical solution: the dust cover is placed on the top of the brake drum and the side plate is extended into the inside of the brake drum, so that the dust cover protects the parts inside the brake drum.

[0022] As a further description of the above technical solution:

[0023] Both sides of the top of the brake drum are fixedly connected with mounting seats, one side of the inner wall of the two mounting seats is fixedly connected with spring three, the other ends of the two spring three are fixedly connected with limiting blocks, and the ends of the two limiting blocks away from the spring three pass through both sides of the inner wall of the brake drum and are slidably connected inside the limiting groove.

[0024] Through the above technical solution: the limit block is pushed by spring three to pass through the two sides of the brake drum and enter the inside of the limit groove so that the dust cover is fixed.

[0025] As a further description of the above technical solution:

[0026] Slide grooves are provided on the front and rear sides of the inner side walls of the two mounting seats, and sliders are slidably connected inside the plurality of slide grooves. Adjacent sides of the two sliders are respectively fixedly connected to the front and rear ends of the limit block.

[0027] Through the above technical solution: the slider is pushed to move inside the slide groove, and the movement of the slider is used to make the limit block withdraw from the limit groove so that the staff can disassemble the dust cover.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the utility model, the pull rod is pulled to make the fixing block withdraw from the fixing groove, and the fixing ring is pulled upward, so that the fixing ring is removed from the outside of the fixing rod, so that the staff can replace the brake pad, and then the new brake pad and the fixing ring are successively sleeved onto the outside of the fixing rod, and the fixing block is pushed into the fixing groove by the thrust of the second spring, so as to fix the brake pad.

[0030] 2. In the utility model, the double-headed screw is rotated, and the push block is pushed to move inside the slot by the rotation of the double-headed screw, and the movement of the push block drives the brake pad to move, so as to adjust the distance between the brake pad and the brake drum. At the same time, the brake pad can be accurately adjusted by using the scale on the bottom wall of the brake drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a bidirectional self-energizing drum brake proposed by the utility model;

[0032] Figure 2 A schematic diagram of the structure of a brake drum of a bidirectional self-energizing drum brake proposed by the utility model;

[0033] Figure 3 A schematic diagram of the structure of a brake pad of a bidirectional self-energizing drum brake proposed by the utility model;

[0034] Figure 4 A cross-sectional view of a fixing ring of a bidirectional self-energizing drum brake proposed by the utility model;

[0035] Figure 5 A schematic diagram of the structure of a protection cover of a bidirectional self-energizing drum brake proposed by the utility model;

[0036] Figure 6 The utility model is a cross-sectional view of a mounting seat of a bidirectional self-energizing drum brake.

[0037] Legend:

[0038] 1. Brake drum; 2. Adjustment mechanism; 201. Double-headed screw; 202. Scale; 3. Mounting seat; 4. Dust cover; 5. Mounting block; 6. Double-headed cylinder; 7. Spring one; 8. Brake pad; 9. Retaining ring; 10. Push block; 11. Fixed rod; 12. Slot; 13. Groove; 14. Through hole; 15. Fixed groove; 16. Positioning block; 17. Fixed block; 18. Spring two; 19. Mounting groove; 20. Pull rod; 21. Side plate; 22. Limiting groove; 23. Slider; 24. Limiting block; 25. Spring three; 26. Slide groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Reference Figure 2 , Figure 3 and Figure 4 The utility model provides an embodiment: a two-way self-enhancing drum brake, including a brake drum 1 and two brake pads 8. The rear end of the inner bottom wall of the brake drum 1 is provided with a slot 12, and both ends of the inner side of the slot 12 are slidably connected with push blocks 10, and the tops of the two push blocks 10 are rotatably connected with fixed rods 11, one end of the two brake pads 8 is provided with a through hole 14, one end of the two fixed rods 11 is slidably connected to the inside of the through hole 14, and the outer side of the end of the two fixed rods 11 away from the push block 10 is slidably connected with a fixing ring 9, and the inner side walls of the two fixing rings 9 are provided with mounting grooves 19 on both sides, and multiple mounting The inside of the groove 19 is slidably connected with a fixed block 17, one end of the multiple fixed blocks 17 is fixedly connected with a pull rod 20, and the outer side of the multiple pull rods 20 is provided with a spring 2 18, and the front and rear sides of the ends of the two fixed rods 11 away from the top of the push block 10 are provided with a fixed groove 15, and the ends of the multiple fixed blocks 17 away from the pull rod 20 are slidably connected inside the fixed groove 15, and the middle part of the adjacent side of the two brake pads is fixedly connected with a spring 17, one end of the multiple springs 2 18 is fixedly connected to the inner wall of the installation groove 19, and the other end of the multiple springs 2 18 is fixedly connected to the end of the fixed block 17 close to the pull rod 20;

[0041] Specifically, the pull rod 20 is pulled to make the fixing block 17 withdraw from the fixing groove 15, and the fixing ring 9 is pulled upward, so that the fixing ring 9 is removed from the outside of the fixing rod 11, so that the staff can replace the brake pad 8.

[0042] Reference Figure 1 and Figure 2 The inner bottom wall of the brake drum 1 is provided with an adjustment mechanism 2, the adjustment mechanism 2 includes a scale 202, the scale 202 is fixedly connected to the middle of the inner bottom wall of the brake drum 1, and a double-headed screw 201 is rotatably connected inside the slot 12, and both ends of the double-headed screw 201 are threadedly connected to the inside of the push block 10;

[0043] Specifically, the double-headed screw 201 can be rotated to push the push block 10 to move inside the slot 12, and the movement of the push block 10 can drive the brake pad 8 to move, thereby adjusting the distance between the brake pad 8 and the brake drum 1.

[0044] Reference Figure 3A groove 13 is formed on one side of the inner wall of the two through holes 14, and positioning blocks 16 are slidably connected inside the two grooves 13, and one side of the two positioning blocks 16 is fixedly connected to one side of the fixing rod 11;

[0045] Specifically, when the brake pad is sleeved onto the outside of the fixing rod 11 , the positioning block 16 can be inserted into the groove 13 , thereby preliminarily fixing the brake pad.

[0046] Reference Figure 2 The front end of the inner bottom wall of the brake drum 1 is fixedly connected with a mounting block 5, and the top of the mounting block 5 is fixedly connected with a double-headed cylinder 6, which is arranged at the front end of one side adjacent to the two brake pads;

[0047] Specifically, the two brake pads 8 are pushed to move to both sides by the double-headed cylinder 6, and are brought into contact with the inner wall of the brake drum 1 so that the brake pads 8 rub against each other to brake the wheels.

[0048] Reference Figure 1 , Figure 5 and Figure 6 A dust cover 4 is provided at the top of the brake drum 1, and a side plate 21 is fixedly connected to the bottom of the dust cover 4. The other end of the side plate 21 is provided inside the brake drum 1. Limiting grooves 22 are provided on both sides of the side plate 21. Both sides of the top of the brake drum 1 are fixedly connected with mounting seats 3. One side of the inner side wall of the two mounting seats 3 is fixedly connected with springs three 25. The other ends of the two springs three 25 are fixedly connected with limiting blocks 24. One end of the two limiting blocks 24 away from the spring three 25 passes through both sides of the inner side wall of the brake drum 1 and is slidably connected to the inside of the limiting grooves 22.

[0049] Specifically, the dust cover 4 is placed on the top of the brake drum 1 and the side plate 21 is extended into the brake drum 1. Then, the limit block 24 is pushed through the two sides of the brake drum 1 and into the limit groove 22 by the spring three 25, so that the dust cover 4 is fixed, and then the dust cover 4 protects the parts inside the brake drum 1.

[0050] Reference Figure 5 and Figure 6 , both front and rear sides of the inner wall of the two mounting seats 3 are provided with slide grooves 26, and the slide blocks 23 are slidably connected inside the multiple slide grooves 26, and the adjacent sides of the two slide blocks 23 are fixedly connected to the front and rear ends of the limit block 24 respectively;

[0051] Specifically, when the dust cover 4 needs to be disassembled, the slider 23 can be pushed to move inside the slide groove 26, and the movement of the slider 23 can be used to make the limiting block 24 withdraw from the limiting groove 22, so that the staff can disassemble the dust cover 4.

[0052] Working principle: When it is necessary to brake the wheel, the two brake pads 8 can be pushed to move to both sides by the double-headed cylinder 6, and contact the inner wall of the brake drum 1 to make the brake pads 8 rub to brake the wheel, and after the brake pads 8 have been used for a long time, the pull rod 20 can be pulled to make the fixing block 17 withdraw from the fixing groove 15, and the fixing ring 9 can be pulled upward to remove the fixing ring 9 from the outside of the fixing rod 11, so that the staff can replace the brake pads 8. After the brake pads 8 are replaced, the new brake pads 8 and the fixing ring 9 can be successively sleeved on the outside of the fixing rod 11, and the fixing block 17 can be pushed into the fixing groove 15 by the thrust of the spring 18. The brake pad 8 is fixed. When the distance between the brake pad 8 and the brake drum 1 needs to be adjusted, the double-headed screw 201 can be rotated, and the rotation of the double-headed screw 201 can be used to push the push block 10 to move inside the slot 12, and the movement of the push block 10 can be used to drive the brake pad 8 to move, so as to adjust the distance between the brake pad 8 and the brake drum 1. At the same time, the brake pad 8 can be accurately adjusted using the scale 202 on the inner bottom wall of the brake drum 1; the dust cover 4 is placed on the top of the brake drum 1 and the side plate 21 is extended into the brake drum 1, and then the limit block 24 is pushed through the two sides of the brake drum 1 and into the limit groove 22 by the spring three 25, so that the dust cover 4 is fixed.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bidirectional self-energizing drum brake, comprising a brake drum (1) and two brake pads (8), characterized in that: The rear end of the inner bottom wall of the brake drum (1) is provided with a groove (12), and both ends of the inner side of the groove (12) are slidably connected to push blocks (10), and the top ends of the two push blocks (10) are rotatably connected to fixed rods (11), and one end of the two brake pads (8) is provided with a through hole (14), and one end of the two fixed rods (11) is slidably connected inside the through hole (14), and the outer side of the ends of the two fixed rods (11) away from the push blocks (10) is slidably connected to a fixing ring (9), and the inner side walls of the two fixing rings (9) are provided with installation grooves (19) on both sides, and a plurality of the installation grooves (19) are all slidably connected to fixed blocks (17) inside, and one end of multiple fixed blocks (17) is fixedly connected to a pull rod (20), and a spring two (18) is arranged on the outside of multiple pull rods (20). The front and rear sides of the ends of the two fixed rods (11) away from the top of the push block (10) are provided with fixed grooves (15), and the ends of multiple fixed blocks (17) away from the pull rod (20) are slidably connected inside the fixed grooves (15). The middle part of the adjacent side of the two brake pads (8) is fixedly connected to a spring one (7), and the inner bottom wall of the brake drum (1) is provided with an adjustment mechanism (2).

2. A two-way self-energizing drum brake according to claim 1, characterized in that: The adjustment mechanism (2) comprises a scale (202) which is fixedly connected to the middle of the inner bottom wall of the brake drum (1). A double-headed screw (201) is rotatably connected inside the slot (12). Both ends of the double-headed screw (201) are threadedly connected to the inside of the push block (10).

3. A two-way self-energizing drum brake according to claim 1, characterized in that: One end of each of the plurality of springs (18) is fixedly connected to the inner wall of the mounting groove (19), and the other end of each of the plurality of springs (18) is fixedly connected to one end of the fixing block (17) close to the pull rod (20).

4. A two-way self-energizing drum brake according to claim 1, characterized in that: A groove (13) is provided on one side of the inner wall of the two through holes (14), and positioning blocks (16) are slidably connected inside the two grooves (13), and one side of the two positioning blocks (16) is fixedly connected to one side of the fixing rod (11).

5. A two-way self-energizing drum brake according to claim 1, characterized in that: A mounting block (5) is fixedly connected to the front end of the inner bottom wall of the brake drum (1), and a double-headed cylinder (6) is fixedly connected to the top end of the mounting block (5). The double-headed cylinder (6) is arranged at the front end of one side adjacent to two brake pads (8).

6. A two-way self-energizing drum brake according to claim 1, characterized in that: The top of the brake drum (1) is provided with a dust cover (4), the bottom of the dust cover (4) is fixedly connected with a side plate (21), the other end of the side plate (21) is arranged inside the brake drum (1), and both sides of the side plate (21) are provided with limiting grooves (22).

7. A two-way self-energizing drum brake according to claim 1, characterized in that: Both sides of the top of the brake drum (1) are fixedly connected to mounting seats (3), one side of the inner wall of the two mounting seats (3) is fixedly connected to spring three (25), the other ends of the two spring three (25) are fixedly connected to limit blocks (24), and the ends of the two limit blocks (24) away from the spring three (25) pass through both sides of the inner wall of the brake drum (1) and are slidably connected to the inside of the limit groove (22).

8. A two-way self-energizing drum brake according to claim 7, characterized in that: Slide grooves (26) are provided on both the front and rear sides of the inner side walls of the two mounting seats (3), and a plurality of slide grooves (26) are slidably connected to the insides of the slide grooves (26), and adjacent sides of the two slide blocks (23) are fixedly connected to the front and rear ends of the limit block (24) respectively.

Images