Drum brake protective cover of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle drum brakes, in particular to an electric vehicle drum brake protective cover which comprises a brake drum and a protective cover body, the protective cover body is arranged on the brake drum, an adjusting supporting shaft used for lever installation is arranged on a bottom plate of the brake drum, and the end, away from the brake drum, of the adjusting supporting shaft is connected with an adjusting connecting rod. The adjusting supporting shaft and the adjusting connecting rod on the side, close to the outer side, of the brake drum are protected through the protective cover, external rainwater or flying stones can be effectively prevented from making contact with the brake drum, and the use stability of a return area where the adjusting connecting rod and the brake grip are connected is greatly improved. Erosion of external rainwater to an adjusting supporting shaft used for driving a parking brake lever in the drum brake to be rotationally connected is reduced, and the use stability and the service life of the electric vehicle drum brake are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle drum brakes, and particularly relates to a protective cover for an electric vehicle drum brake. Background Art

[0002] The application of electric vehicle drum brakes is extensive. Its advantages lie in large braking force and simple structure. The drum brake realizes deceleration through the friction between the brake pads inside the bottom plate and the brake drum rotating with the wheel, and is suitable for electric vehicles, especially for rear-wheel braking.

[0003] The existing adjusting support shaft and adjusting connecting rod of the electric vehicle drum brake are exposed outside for a long time, and are easily severely corroded by external rainwater, affecting the return of the adjusting support shaft and causing the problem of electric vehicle brake failure. Therefore, a protective cover for an electric vehicle drum brake is proposed to effectively prevent the contact of external rainwater or flying stones, greatly improve the use stability of the return area where the adjusting connecting rod is connected to the brake grip, reduce the erosion of the external rainwater on the adjusting support shaft used to drive the rotation connection of the parking brake lever inside the drum brake, and greatly improve the use stability and service life of the electric vehicle drum brake. Summary of the Utility Model

[0004] Aiming at the problems in the prior art, the utility model provides a protective cover for an electric vehicle drum brake to effectively prevent the contact of external rainwater or flying stones, greatly improve the use stability of the return area where the adjusting connecting rod is connected to the brake grip, reduce the erosion of the external rainwater on the adjusting support shaft used to drive the rotation connection of the parking brake lever inside the drum brake, and greatly improve the use stability and service life of the electric vehicle drum brake.

[0005] The technical solution adopted by the utility model to solve its technical problems is a protective cover for an electric vehicle drum brake, which includes a brake drum and a protective cover. The protective cover is arranged on the brake drum. An adjusting support shaft for lever installation is arranged on the bottom plate of the brake drum, and an adjusting connecting rod is connected to the end of the adjusting support shaft away from the brake drum.

[0006] By adopting the above technical solution, the protective cover protects the adjusting support shaft and the adjusting connecting rod at the outer side of the brake drum, can effectively prevent the contact of external rainwater or flying stones, greatly improve the use stability of the return area where the adjusting connecting rod is connected to the brake grip, reduce the erosion of the external rainwater on the adjusting support shaft used to drive the rotation connection of the parking brake lever inside the drum brake, and greatly improve the use stability and service life of the electric vehicle drum brake.

[0007] Specifically, the protective cover includes an annular base and an end cover. The annular base is sleeved on the outer periphery of the adjusting support shaft and is connected to the bottom plate of the brake drum.

[0008] By adopting the above technical solution, the protective cover protects the outside of the adjusting support shaft.

[0009] Specifically, an inner clamping sleeve is provided at one end of the annular base away from the brake drum. Telescopic openings are respectively formed on both sides of the inner clamping sleeve, and wedge-shaped buckles are arranged in the telescopic openings. The tail of the wedge-shaped buckle is connected to the annular base.

[0010] Specifically, bayonets corresponding to the wedge-shaped buckles are respectively formed on both sides of the end cover.

[0011] By adopting the above technical solution, the end cover buckles the inner clamping sleeve of the annular base through the buckling connection between the wedge-shaped buckle and the bayonet.

[0012] Specifically, notch openings for adjusting the rotation of the connecting rod are respectively formed at the bottoms of the end cover and the inner clamping sleeve.

[0013] Specifically, when the notch opening is used for adjusting the connecting rod during the period when the connecting rod is pulled by the return spring of the electric vehicle, the connecting rod can have sufficient rotation space.

[0014] The beneficial effects of the present utility model are as follows: The protective cover protects the adjusting support shaft and the adjusting connecting rod on the outer side close to the brake drum, which can effectively prevent the contact of external rainwater or flying stones, greatly improve the use stability of the return position area where the adjusting connecting rod is connected to the brake grip, reduce the erosion of the external rainwater on the adjusting support shaft used to drive the rotation connection of the parking brake lever inside the drum brake, greatly improve the use stability and service life of the electric vehicle drum brake, and solve the problem that the adjusting support shaft and the adjusting connecting rod of the existing electric vehicle drum brake are exposed outside for a long time, are easily corroded seriously by external rainwater, affect the return of the adjusting support shaft, and cause the brake failure of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is the overall schematic diagram of the present utility model;

[0017] Figure 2 is the schematic diagram of the annular base of the present utility model;

[0018] Figure 3 is the schematic diagram of the protective cover of the present utility model;

[0019] In the figure: 1, brake drum; 11, adjusting support shaft; 12, adjusting connecting rod; 2, protective cover; 21, annular base; 22, end cover; 23, inner clamping sleeve; 24, telescopic opening; 25, wedge-shaped buckle; 26, bayonet; 27, notch opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with the specific embodiments.

[0021] To improve the usage stability, as Figures 1-3 shown, a drum brake protection cover for an electric vehicle according to the present utility model includes a brake drum 1 and a protection cover 2. The protection cover 2 is disposed on the brake drum 1. An adjustment support shaft 11 for lever installation is provided on the bottom plate of the brake drum 1, and an adjustment connecting rod 12 is connected to one end of the adjustment support shaft 11 away from the brake drum 1.

[0022] During use, the protection cover 2 protects the adjustment support shaft 11 and the adjustment connecting rod 12 on the outer side of the brake drum 1, effectively preventing external rainwater or flying stones from contacting them, and greatly improving the usage stability of the return area where the adjustment connecting rod 12 is connected to the brake grip.

[0023] The present utility model further includes that the protection cover 2 includes an annular base 21 and an end cover 22. The annular base 21 is sleeved on the outer periphery of the adjustment support shaft 11 and is connected to the bottom plate of the brake drum 1.

[0024] For snap protection, for example, as Figures 1-3 shown, the present utility model further includes that an inner card sleeve 23 is provided at one end of the annular base 21 away from the brake drum 1. Expansion openings 24 are respectively provided on both sides of the inner card sleeve 23, and wedge-shaped fasteners 25 are provided in the expansion openings 24. The tails of the wedge-shaped fasteners 25 are connected to the annular base 21.

[0025] The present utility model further includes that bayonet openings 26 corresponding to the wedge-shaped fasteners 25 are respectively provided on both sides of the end cover 22.

[0026] During use, after aligning the slot 27 of the end cover 22 with the slot 27 of the inner card sleeve 23, the end cover 22 is pressed on the inner card sleeve 23. At this time, the bayonet openings 26 of the end cover 22 snap the wedge-shaped fasteners 25 of the inner card sleeve 23, realizing the covering protection of the connection between the adjustment support shaft 11 and the adjustment connecting rod 12.

[0027] The present utility model further includes that slots 27 for the rotation of the adjustment connecting rod 12 are respectively provided at the bottoms of the end cover 22 and the inner card sleeve 23.

[0028] When the present utility model is in use, after aligning the slot 27 of the end cover 22 with the slot 27 of the inner card sleeve 23, the end cover 22 is pressed on the inner card sleeve 23. At this time, the bayonet openings 26 of the end cover 22 snap the wedge-shaped fasteners 25 of the inner card sleeve 23, realizing the covering protection of the connection between the adjustment support shaft 11 and the adjustment connecting rod 12. When maintenance is required, the wedge-shaped fasteners 25 in the bayonet openings 26 are pushed by tools such as a screwdriver, so that the wedge-shaped fasteners 25 leave the bayonet openings 26, and then the end cover 22 can be removed, exposing the adjustment support shaft 11 and the adjustment connecting rod 12, and then the adjustment support shaft 11 and the adjustment connecting rod 12 can be operated and maintained.

[0029] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of protection required by the present utility model. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle drum brake protection cover, characterized in that, It includes a brake drum (1) and a protective cover (2). The protective cover (2) is arranged on the brake drum (1). An adjusting support shaft (11) for lever installation is arranged on the bottom plate of the brake drum (1), and an adjusting connecting rod (12) is connected to one end of the adjusting support shaft (11) away from the brake drum (1).

2. The electric vehicle drum brake protection cover according to claim 1, characterized in that, The protective cover (2) includes an annular base (21) and an end cover (22). The annular base (21) is sleeved on the outer periphery of the adjusting support shaft (11) and is connected to the bottom plate of the brake drum (1).

3. The electric vehicle drum brake protection cover according to claim 2, wherein An inner clamping sleeve (23) is arranged at one end of the annular base (21) away from the brake drum (1). Expansion openings (24) are respectively formed on both sides of the inner clamping sleeve (23), wedge-shaped buckles (25) are arranged in the expansion openings (24), and the tails of the wedge-shaped buckles (25) are connected to the annular base (21).

4. The drum brake protection cover for an electric vehicle according to claim 3, characterized in that, Bays (26) corresponding to the wedge-shaped buckles (25) are respectively formed on both sides of the end cover (22).

5. The electric vehicle drum brake protection cover according to claim 4, wherein, Notches (27) for the adjusting connecting rod (12) to rotate are formed at the bottoms of both the end cover (22) and the inner clamping sleeve (23).

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