Self-adjusting drum brake of electric vehicle

Abstract

The self-adjusting drum brake of the electric vehicle comprises a cover plate, the top of the front face of the cover plate is rotationally connected with a rotating rod through a bearing seat, brake discs are fixedly connected to the two sides of the surface of the rotating rod, and brake pads are bonded to the outer surfaces of the brake discs. And the corresponding tops and bottoms of the two brake discs are fixedly connected with connecting blocks. When a gap between a brake pad connected with the surface of the brake disc and a rotating brake drum is too large, a certain angle is formed between the adjusting piece and the connecting piece by loosening the limiting bolt, the adjusting piece is shifted to a proper angle, and then the guide wheel is attached to the opposite face and the proper position of the brake disc. The connecting piece and the adjusting piece are fixed through the limiting bolt, then during braking, the surface of the brake disc is connected with the brake pad to be attached to the brake drum, and the adjusting structure is convenient to disassemble and assemble through threaded connection between the hollow threaded cylinder and the threaded sleeve.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle drum brakes, in particular to a self-adjusting drum brake for an electric vehicle. Background Art

[0002] Electric vehicle drum brakes are a relatively simple and traditional braking method, commonly found on rear wheels. The braking principle is to reduce the vehicle speed until it reaches a standstill through the friction between the stationary brake pads in the brake drum and the rotating brake drum.

[0003] The most important component of drum brake is brake pad. Due to long-term use, brake pad will wear out, resulting in too large a gap between the brake pad and the rotating brake drum, thereby reducing the braking effect. For this reason, we propose a self-adjusting drum brake for electric vehicles to solve the above-mentioned shortcomings. Utility Model Content

[0004] The utility model aims to provide a self-adjusting drum brake for an electric vehicle, which can adjust the gap between the brake pad and the brake drum, thereby improving the braking effect, so as to solve the above-mentioned background technical problems.

[0005] The utility model solves the above technical problems with the following technical solutions: a self-adjusting drum brake for an electric vehicle, comprising a cover plate, the top of the front face of the cover plate is rotatably connected to a rotating rod through a bearing seat, both sides of the surface of the rotating rod are fixedly connected to brake discs, the outer surface of the brake disc is bonded with a brake pad, the top and bottom corresponding to the two brake discs are fixedly connected to connecting blocks, the opposite sides of each two connecting blocks are hung by a tension spring, and an adjusting structure is arranged at the axis of the front face of the cover plate and between the two brake discs;

[0006] The adjustment structure includes a hollow threaded barrel fixedly connected to the axis center of the front side of the cover plate, and is connected to and welded with the cover plate. A threaded sleeve is threadedly connected to the surface of the hollow threaded barrel, and connecting plates are fixedly connected on both sides of the surface of the threaded sleeve. The front side of the connecting plate is threadedly connected to an adjustment plate via a limit bolt, and the side of the adjustment plate away from the connecting plate is movably connected to a guide wheel via a rotating shaft.

[0007] Preferably, a driving rod passes through the bottom of the front side of the cover plate, a protrusion 1 is fixedly connected to the surface of the driving rod, and a protrusion 2 that fits and slides with the driving rod is fixedly connected to the bottom of the opposite side of the two brake discs.

[0008] Preferably, the two protrusions 2 are centrally symmetrically arranged with the driving rod as the center point, and the driving rod is driven by an external driving source.

[0009] Preferably, a slideway is provided on one side opposite to the two brake discs and at a position corresponding to the guide wheel, and the inner surface of the slideway is in contact with the guide wheel.

[0010] Preferably, threaded holes threadedly connected to the limiting bolts are provided inside the connecting plate and corresponding to the adjusting plate.

[0011] 1. The beneficial effect of the utility model is that when the gap between the brake pad connected to the surface of the brake disc and the rotating brake drum is too large, it is only necessary to loosen the limiting bolt to form a certain angle between the adjusting plate and the connecting plate, so that the adjusting plate is moved to an appropriate angle, so that the guide wheel is fitted to the opposite side of the brake disc. After the appropriate position, the connecting plate and the adjusting plate are fixed by the limiting bolt, and then during braking, the brake pad connected to the surface of the brake disc is fitted to the brake drum, and the threaded connection between the hollow threaded cylinder and the threaded sleeve facilitates the disassembly and assembly of the adjustment structure. By setting the above structure, the gap between the brake pad and the brake drum can be adjusted, thereby improving the braking effect.

[0012] 2. The utility model drives the first protrusion through the driving rod, so that the second protrusion is lifted by the cooperation of the convex shape, so that the brake disc is pushed open, and then the brake pad is driven to open to both sides and reset by the tension spring.

[0013] 3. The utility model provides a slideway to guide the guide wheel so that the guide wheel can be fitted in an appropriate position.

[0014] 4. The utility model provides a threaded hole, and uses a limiting bolt to make a threaded connection between the adjusting plate and the threaded hole, thereby facilitating loosening so that the guide wheel fits in an appropriate position on the slideway. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] in:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the adjustment structure of the utility model;

[0018] Figure 3 It is a front view of the brake disc structure of the utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Cover plate; 2. Turning rod; 3. Brake disc; 4. Brake pad; 5. Connecting block; 6. Tension spring; 7. Hollow threaded cylinder; 8. Threaded sleeve; 9. Connecting plate; 10. Limit bolt; 11. Adjusting plate; 12. Guide wheel; 13. Driving rod; 14. Bump 1; 15. Bump 2; 16. Slideway; 17. Threaded hole. DETAILED DESCRIPTION

[0021] Hereinafter, an embodiment of the self-adjusting drum brake of an electric vehicle of the present invention will be described with reference to the accompanying drawings.

[0022] Embodiment 1:

[0023] Figure 1-3 The utility model shows a self-adjusting drum brake for an electric vehicle according to an embodiment of the present invention, comprising a cover plate 1, a rotating rod 2 is rotatably connected to the top of the front of the cover plate 1 through a bearing seat, brake discs 3 are fixedly connected to both sides of the surface of the rotating rod 2, brake pads 4 are bonded to the outer surface of the brake disc 3, and connecting blocks 5 are fixedly connected to the corresponding tops and bottoms of the two brake discs 3, and the opposite sides of each two connecting blocks 5 are hung by tension springs 6, a driving rod 13 is passed through the bottom of the front of the cover plate 1, a protrusion 14 is fixedly connected to the surface of the driving rod 13, and a protrusion 2 15 that fits and slides with the driving rod 13 is fixedly connected to the bottom of the opposite side of the two brake discs 3, and the two protrusions 2 15 are symmetrically arranged with the driving rod 13 as the center point, the driving rod 13 is driven by an external driving source, and the protrusion 1 14 is driven by the driving rod 13, so that the protrusion 2 15 is lifted by the cooperation of the convex shape, so that the brake disc 3 is pushed open, and then the brake pads 4 are driven to open to both sides and reset by the tension spring 6, and an adjustment structure is arranged at the axis of the front of the cover plate 1 and between the two brake discs 3;

[0024] The adjustment structure includes a hollow threaded cylinder 7 fixedly connected to the axis of the front side of the cover plate 1, and the cover plate 1 is penetrated and welded. The surface of the hollow threaded cylinder 7 is threadedly connected with a threaded sleeve 8. Both sides of the surface of the threaded sleeve 8 are fixedly connected with connecting pieces 9. The front side of the connecting piece 9 is threadedly connected with an adjusting piece 11 through a limiting bolt 10. The side of the adjusting piece 11 away from the connecting piece 9 is movably connected with a guide wheel 12 through a rotating shaft. When the gap between the brake pad 4 connected to the surface of the brake disc 3 and the rotating brake drum is too large, the limiting bolt 10 can be loosened to make the adjusting piece 1 1 and the connecting piece 9 form a certain angle, so that the adjusting piece 11 is moved to an appropriate angle, so that the guide wheel 12 is fitted on the opposite side of the brake disc 3. After the appropriate position, the connecting piece 9 and the adjusting piece 11 are fixed by the limit bolt 10, and then during braking, the surface of the brake disc 3 is connected to the brake pad 4 and the brake drum, and the threaded connection between the hollow threaded tube 7 and the threaded sleeve 8 facilitates the disassembly and assembly of the adjustment structure. By setting the above structure, the gap between the brake pad and the brake drum can be adjusted, thereby improving the braking effect.

[0025] Embodiment 2:

[0026] Figure 1-3The utility model shows a self-adjusting drum brake for an electric vehicle according to an embodiment of the present invention, comprising a cover plate 1, a rotating rod 2 is rotatably connected to the top of the front side of the cover plate 1 through a bearing seat, brake discs 3 are fixedly connected to both sides of the surface of the rotating rod 2, brake pads 4 are bonded to the outer surface of the brake disc 3, connecting blocks 5 are fixedly connected to the corresponding tops and bottoms of the two brake discs 3, and the opposite sides of each two connecting blocks 5 are hung by a tension spring 6, and an adjusting structure is arranged at the axis of the front side of the cover plate 1 and between the two brake discs 3;

[0027] The adjusting structure includes a hollow threaded cylinder 7 fixedly connected to the axis center of the front face of the cover plate 1, and the cover plate 1 is penetrated and welded. A threaded sleeve 8 is threadedly connected to the surface of the hollow threaded cylinder 7, and connecting pieces 9 are fixedly connected to the two sides of the surface of the threaded sleeve 8. The front face of the connecting piece 9 is threadedly connected to an adjusting piece 11 through a limiting bolt 10. A threaded hole 17 threadedly connected to the limiting bolt 10 is provided in the connecting piece 9 corresponding to the adjusting piece 11. By providing the threaded hole 17, the limiting bolt 10 makes the adjusting piece 11 and the threaded hole 17 threadedly connected, thereby facilitating loosening, so that the guide wheel 12 fits in the appropriate position of the slideway 16. The side of the adjusting piece 11 away from the connecting piece 9 is movably connected to the guide wheel 12 through a rotating shaft. A slideway 16 is provided on the side opposite to the brake disc 3 and corresponding to the guide wheel 12. By providing the slideway 16, the guide wheel 12 is guided and fitted, so that the guide wheel 12 fits in the appropriate position, and the inner surface of the slideway 16 fits with the guide wheel 12.

[0028] Working principle: When the utility model is used, when the gap between the brake pad 4 connected to the surface of the brake disc 3 and the rotating brake drum is too large, it is only necessary to loosen the limit bolt 10, and the limit bolt 10 will be threadedly rotated on the inner surface of the threaded hole 17, so that a certain angle is formed between the adjusting plate 11 and the connecting plate 9, so that the adjusting plate 11 is moved to an appropriate angle, and then the guide wheel 12 is fitted into the slideway 16 opened on the opposite side of the brake disc 3. After fitting into the appropriate position of the slideway 16, the connecting plate 9 and the adjusting plate 11 are fixed by the limit bolt 10, and then during braking, the brake pad 4 connected to the surface of the brake disc 3 is fitted with the brake drum, and the threaded connection between the hollow threaded tube 7 and the threaded sleeve 8 facilitates the disassembly and assembly of the adjustment structure. Through the arrangement of the above structure, the gap between the brake pad and the brake drum can be adjusted, thereby improving the braking effect.

[0029] During adjustment, the driving rod 13 can be coordinated at the same time, so that the driving rod 13 drives the convex block 14. The convex design is used to make the convex block 2 15 select the position where the guide wheel 12 fits when it is lifted up.

Claims

1. A self-adjusting drum brake for an electric vehicle, comprising a cover plate (1), the top of the front side of the cover plate (1) being rotatably connected to a rotating rod (2) via a bearing seat, both sides of the surface of the rotating rod (2) being fixedly connected to a brake disc (3), the outer surface of the brake disc (3) being bonded to a brake pad (4), characterized in that: The corresponding tops and bottoms of the two brake discs (3) are fixedly connected with connecting blocks (5), and the opposite sides of each of the two connecting blocks (5) are connected by tension springs (6). An adjustment structure is provided at the axis center of the front side of the cover plate (1) and between the two brake discs (3); The adjustment structure comprises a hollow threaded barrel (7) fixedly connected to the axis center of the front face of the cover plate (1), and penetrating and welded to the cover plate (1); a threaded sleeve (8) is threadedly connected to the surface of the hollow threaded barrel (7); connecting pieces (9) are fixedly connected to both sides of the surface of the threaded sleeve (8); an adjustment piece (11) is threadedly connected to the front face of the connecting piece (9) via a limiting bolt (10); and a guide wheel (12) is movably connected to the side of the adjustment piece (11) away from the connecting piece (9) via a rotating shaft.

2. The self-adjusting drum brake of an electric vehicle according to claim 1, characterized in that: A driving rod (13) passes through the bottom of the front side of the cover plate (1), a protrusion 1 (14) is fixedly connected to the surface of the driving rod (13), and a protrusion 2 (15) which fits and slides with the driving rod (13) is fixedly connected to the bottom of the opposite side of the two brake discs (3).

3. The self-adjusting drum brake of an electric vehicle according to claim 2, characterized in that: The two second protrusions (15) are centrally symmetrically arranged with the driving rod (13) as the center point, and the driving rod (13) is driven by an external driving source.

4. The self-adjusting drum brake of an electric vehicle according to claim 1, characterized in that: A slideway (16) is provided on one side opposite to the two brake discs (3) and at a position corresponding to the guide wheel (12), and the inner surface of the slideway (16) is in contact with the guide wheel (12).

5. The self-adjusting drum brake of an electric vehicle according to claim 1, characterized in that: The connecting piece (9) and the adjusting piece (11) are provided with threaded holes (17) threadedly connected to the limiting bolts (10) in their interiors corresponding to the adjusting piece (11).

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