Light-weight drum brake bottom plate

Abstract

The utility model relates to the technical field of brake structures, in particular to a lightweight drum brake bottom plate which comprises a main body, a bottom plate assembly is fixedly connected in the main body, a brake assembly is fixedly connected to the side face of the main body, and a power assisting assembly is fixedly connected in the bottom plate assembly. The drum brake bottom plate made of a series of light-weight materials such as the magnesium alloy plate, the aluminum alloy outer ring, the composite metal outer lining and the engineering plastic inner lining is beneficial to reducing the self weight of a vehicle body, so that better fuel economy is brought, after the weight is reduced, the internal single-piece cost of a company is reduced, and after the weight of the whole vehicle is light, the cost is reduced. A driver can carry more goods, and the oil cost loss is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake structures, in particular to a lightweight drum brake bottom plate. Background Art

[0002] Drum brakes use a brake transmission mechanism to make the brake shoe press the brake pad against the inner side of the brake drum, thereby generating braking force. The brake drum rotates with the wheel, and the two ends of the brake shoe are set on the bottom plate. The cam on the bottom plate and the roller at the end of the brake shoe drive the brake pad to press against the brake drum. The bottom plate is an important part of the brake and provides support for the entire brake.

[0003] Authorization announcement number CN213235867U discloses a lightweight drum brake. This patented technology is connected to the cam and the brake shoe respectively by the mounting seat 1 and the mounting seat 2 protruding from the bottom plate, which is conducive to reducing the volume and weight of the bottom plate. The thinner middle part of the bottom plate is also conducive to reducing the weight of the bottom plate. The tendon of the brake shoe is arranged into two parallel flat plate structures, and connecting ears 1 and 2 are arranged at both ends of the tendon. Connecting ears 1 and 2 are on the same plane as the tendon, and both are flat plate structures, which is conducive to the molding of the brake shoe. The molding of connecting ears 1 and 2 does not require the setting of a separate core, which simplifies the casting process and facilitates the molding of the brake shoe.

[0004] At present, national laws and regulations require that blue-plate light trucks are not allowed to be overloaded. According to the configuration of the existing vehicle, the weight before loading is basically close to the full load of the vehicle. In order not to violate laws and regulations, to allow drivers to carry more goods and save fuel consumption, the vehicle needs to be reduced in weight. The original brake base plate weighs 4.8 Kg, and the purpose is to reduce the weight by 15%-20% on the original basis; weight reduction mainly involves reducing materials. For parts that are not subject to stress, materials are reduced, and for parts that are subject to stress, materials are increased. Therefore, a lightweight drum brake base plate is needed to improve the above problems. Utility Model Content

[0005] In order to solve the current national regulations that blue-plate light trucks are not allowed to be overloaded, according to the existing configuration of the whole vehicle, the weight before loading is basically close to the full load of the whole vehicle. In order not to violate laws and regulations, to allow drivers to carry more goods and save fuel consumption, etc., it is necessary to reduce the weight of the whole vehicle. The original weight of the brake base plate is 4.8 Kg, and the purpose is to reduce the weight by 15%-20% on the original basis; the weight reduction is mainly to reduce materials, for the parts without stress, reduce materials, for the parts with stress, increase materials. The purpose of the utility model is to provide a lightweight drum brake base plate to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lightweight drum brake base plate comprises a main body, a base plate assembly is fixedly connected inside the main body, a brake assembly is fixedly connected to the side of the main body, and a power assist assembly is fixedly connected inside the base plate assembly;

[0008] The main body includes a metal ring;

[0009] The bottom plate assembly comprises a magnesium alloy plate, a composite metal outer lining is fixedly connected to the side of the magnesium alloy plate, an engineering plastic inner lining is fixedly connected to the inside of the magnesium alloy plate, and an aluminum alloy outer ring is fixedly connected to the top of the engineering plastic inner lining;

[0010] The brake assembly includes a mounting frame, a brake hydraulic cylinder is arranged on the side of the mounting frame, an oil pipe is fixedly connected to the top of the brake hydraulic cylinder, a brake caliper is arranged on the side of the mounting frame, a brake frame is arranged at the bottom of the mounting frame, and a brake disc is arranged at the bottom of the brake frame.

[0011] As a preferred solution of the present invention, a first mounting hole is opened inside the magnesium alloy plate, and a second mounting hole is opened on the side of the magnesium alloy plate.

[0012] As a preferred solution of the utility model, a positioning hole is provided on the top of the magnesium alloy plate, and a circular groove is provided inside the engineering plastic lining.

[0013] As a preferred solution of the utility model, a corrosion-resistant plate is fixedly connected to the side surface of the aluminum alloy outer ring, and a shock-proof plate is fixedly connected to the side surface of the magnesium alloy plate.

[0014] As a preferred solution of the utility model, a protective support plate is fixedly connected to the top of the mounting frame, and a brake master cylinder is arranged inside the protective support plate.

[0015] As a preferred solution of the utility model, a pull rod is fixedly connected to the side of the brake caliper, and a brake friction pad is arranged at the bottom of the brake caliper.

[0016] As a preferred solution of the utility model, the power-boosting assembly includes a vacuum booster, and a support rod is fixedly connected to the top of the vacuum booster.

[0017] As a preferred solution of the utility model, a brake warning light is fixedly connected to the top of the support rod, and a plurality of the support rods and brake warning lights are provided.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. In the utility model, the drum brake base plate made of a series of lightweight materials such as magnesium alloy plate, aluminum alloy outer ring, composite metal outer lining, and engineering plastic lining helps to reduce the weight of the vehicle body, thereby bringing better fuel economy. After the weight is reduced, the unit cost within the company is reduced. After the weight of the whole vehicle is light, the driver can carry more goods and the fuel cost loss is also reduced.

[0020] 2. In the utility model, the brake assembly is composed of a brake disc, a brake hydraulic cylinder, a brake caliper and an oil pipe. When braking, the oil is pressed into the inner and outer wheel cylinders, and the pistons thereof press the two brake pads against the brake disc under the action of the hydraulic pressure, thereby generating a friction moment to brake. This type of braking does not require transmission parts such as brake arms, so that it has a simple structure, a small mass and a high mechanical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the brake base plate assembly of the utility model;

[0023] Figure 3 This is a schematic diagram of the brake assembly structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the power assist component of the utility model.

[0025] In the figure: 1. main body; 101. metal ring; 2. bottom plate assembly; 201. magnesium alloy plate; 202. first mounting hole; 203. aluminum alloy outer ring; 204. shockproof plate; 205. composite metal outer lining; 206. second mounting hole; 207. corrosion-resistant plate; 208. circular groove; 209. positioning hole; 210. engineering plastic lining; 3. brake assembly; 301. mounting frame; 302. brake hydraulic cylinder; 303. oil pipe; 304. brake master cylinder; 305. protective support plate; 306. pulling rod; 307. brake caliper; 308. brake friction pad; 309. brake disc; 310. brake frame; 4. power-assist assembly; 401. vacuum booster; 402. support rod; 403. brake warning light. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] Example: See Figure 1-Figure 4A lightweight drum brake base plate shown in the figure comprises a main body 1, a base plate assembly 2 is fixedly connected inside the main body 1, a brake assembly 3 is fixedly connected to the side of the main body 1, and a booster assembly 4 is fixedly connected inside the base plate assembly 2;

[0028] In this embodiment, refer to Figure 1 , Figure 2 and Figure 3 As shown, the main body 1 includes a metal ring 101, the bottom plate assembly 2 includes a magnesium alloy plate 201, the side of the magnesium alloy plate 201 is fixedly connected with a composite metal outer lining 205, the interior of the magnesium alloy plate 201 is fixedly connected with an engineering plastic lining 210, the top of the engineering plastic lining 210 is fixedly connected with an aluminum alloy outer ring 203, the brake assembly 3 includes a mounting frame 301, the side of the mounting frame 301 is provided with a brake hydraulic cylinder 302, the top of the brake hydraulic cylinder 302 is fixedly connected with an oil pipe 303, and the side of the mounting frame 301 is fixedly connected with a composite metal outer lining 205. A brake caliper 307 is arranged on the surface, a brake frame 310 is arranged at the bottom of the mounting frame 301, and a brake disc 309 is arranged at the bottom of the brake frame 310. The drum brake base plate made of a series of lightweight materials such as magnesium alloy plate 201, aluminum alloy outer ring 203, composite metal outer lining 205, and engineering plastic lining 210 helps to reduce the weight of the vehicle body, thereby bringing better fuel economy. After the weight is reduced, the unit cost within the company is reduced. After the weight of the whole vehicle is light, the driver can carry more goods and the fuel cost loss is also reduced.

[0029] The magnesium alloy plate 201 is provided with a first mounting hole 202, the side of the magnesium alloy plate 201 is provided with a second mounting hole 206, the top of the magnesium alloy plate 201 is provided with a positioning hole 209, the inside of the engineering plastic lining 210 is provided with a circular groove 208, the side of the aluminum alloy outer ring 203 is fixedly connected with a corrosion-resistant plate 207, the side of the magnesium alloy plate 201 is fixedly connected with a shockproof plate 204, the top of the mounting frame 301 is fixedly connected with a protective support plate 305, and the inside of the protective support plate 305 is provided with a brake The master cylinder 304 and the side of the brake caliper 307 are fixedly connected with a pulling rod 306, and the bottom of the brake caliper 307 is provided with a brake friction pad 308. The brake assembly 3 is composed of a brake disc 309, a brake hydraulic cylinder 302, a brake caliper 307 and an oil pipe 303. When braking, the oil is pressed into the inner and outer wheel cylinders, and the pistons thereof press the two brake pads against the brake disc 309 under the action of the hydraulic pressure, thereby generating a friction torque to brake. This type of braking does not require transmission parts such as brake arms, so that it has a simple structure, a small mass and a high mechanical efficiency.

[0030] In this embodiment, refer to Figure 1 and Figure 4As shown, the booster assembly 4 includes a vacuum booster 401, the top of the vacuum booster 401 is fixedly connected to a support rod 402, the top of the support rod 402 is fixedly connected to a brake warning light 403, and the support rod 402 and the brake warning light 403 are provided with a plurality of vacuum boosters 401, which greatly improves the efficiency of the brake and enables the driver to brake more easily.

[0031] In the present solution, a lightweight drum brake base plate is made of a series of lightweight materials such as magnesium alloy plate 201, aluminum alloy outer ring 203, composite metal outer lining 205, and engineering plastic inner lining 210 as the main materials of the drum brake base plate. The magnesium alloy plate 201 has good toughness and strong shock absorption. When subjected to external force, it is easy to produce large deformation, but when subjected to impact load, the energy absorbed is twice that of aluminum. Therefore, it is very suitable for parts subjected to impact. The magnesium alloy plate 201 has a high damping capacity and is an ideal material for avoiding worker fatigue caused by vibration and noise. The aluminum alloy outer ring 203 has high strength, fracture toughness, fatigue strength and corrosion resistance stability. The lightweight drum brake base plate brings better fuel economy.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightweight drum brake base plate, comprising a main body (1), characterized in that: A base plate assembly (2) is fixedly connected inside the main body (1), a brake assembly (3) is fixedly connected to the side of the main body (1), and a power assist assembly (4) is fixedly connected inside the base plate assembly (2); The main body (1) comprises a metal ring (101); The bottom plate assembly (2) comprises a magnesium alloy plate (201), a composite metal outer liner (205) being fixedly connected to the side of the magnesium alloy plate (201), an engineering plastic inner liner (210) being fixedly connected to the inside of the magnesium alloy plate (201), and an aluminum alloy outer ring (203) being fixedly connected to the top of the engineering plastic inner liner (210); The brake assembly (3) comprises a mounting frame (301), a brake hydraulic cylinder (302) is arranged on the side of the mounting frame (301), an oil pipe (303) is fixedly connected to the top of the brake hydraulic cylinder (302), a brake caliper (307) is arranged on the side of the mounting frame (301), a brake frame (310) is arranged at the bottom of the mounting frame (301), and a brake disc (309) is arranged at the bottom of the brake frame (310).

2. A lightweight drum brake base plate according to claim 1, characterized in that: A first mounting hole (202) is provided inside the magnesium alloy plate (201), and a second mounting hole (206) is provided on the side surface of the magnesium alloy plate (201).

3. The lightweight drum brake base plate according to claim 1, characterized in that: A positioning hole (209) is provided on the top of the magnesium alloy plate (201), and a circular groove (208) is provided inside the engineering plastic liner (210).

4. The lightweight drum brake base plate according to claim 1, characterized in that: A corrosion-resistant plate (207) is fixedly connected to the side surface of the aluminum alloy outer ring (203), and a shock-proof plate (204) is fixedly connected to the side surface of the magnesium alloy plate (201).

5. The lightweight drum brake base plate according to claim 1, characterized in that: A protective support plate (305) is fixedly connected to the top of the mounting frame (301), and a brake master cylinder (304) is arranged inside the protective support plate (305).

6. The lightweight drum brake base plate according to claim 1, characterized in that: A pulling rod (306) is fixedly connected to the side of the brake caliper (307), and a brake friction pad (308) is arranged at the bottom of the brake caliper (307).

7. The lightweight drum brake base plate according to claim 1, characterized in that: The boosting assembly (4) comprises a vacuum booster (401), and a support rod (402) is fixedly connected to the top of the vacuum booster (401).

8. The lightweight drum brake base plate according to claim 7, characterized in that: A brake warning light (403) is fixedly connected to the top of the support rod (402), and a plurality of the support rod (402) and the brake warning light (403) are provided.

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