Air cooling cover of brake drum and air cooling type drum brake

Abstract

The air cooling cover comprises an air cooling cover body, the air cooling cover body is of a hollow structure, the air cooling cover body is arranged in the circumferential direction of the brake drum, and the inner side wall of the air cooling cover body and the outer side face of the brake drum are the same in shape. The air cooling cover body is used for being arranged on a brake drum in a sleeving mode, the inner side wall of the air cooling cover body is attached to the outer side face of the brake drum, and a plurality of cooling fins are distributed on the outer side face of the air cooling cover body in the circumferential direction. The cooling device is simple in structure and convenient to install, and the cooling cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motor vehicles, in particular to an air-cooling cover for a drum brake and an air-cooled drum brake. Background Art

[0002] Since the brake drum can provide relatively large frictional braking force, most large trucks use drum brakes for braking. The drum brake mainly consists of components such as a brake drum, brake shoes, friction linings, and brake wheel cylinders. However, when the existing brake drum brakes, it generates a large amount of heat. If the heat cannot be dissipated in time, it is easy to cause the temperature of the friction linings and the brake drum to be too high, and long-term use will damage the friction linings and the brake drum. Therefore, it is necessary to dissipate heat from the brake drum. There are three existing heat dissipation methods, namely air cooling, water cooling, and oil cooling.

[0003] For the air-cooling heat dissipation method, such as the drum brake device with a heat dissipation structure with the publication number: CN 216659856 U, which includes a drum brake body and a casing. A heat conduction sleeve is arranged outside the drum brake body, and heat dissipation fins are fixedly connected inside the heat conduction sleeve. The heat dissipation fins are in contact with the drum brake body. Heat dissipation holes are provided on the casing, and a temperature sensor is arranged on the inner surface of the casing. Two symmetrically distributed fixing frames are fixedly connected to the outside of the casing. The ends of the two fixing frames away from the casing are jointly fixedly connected to a waste liquid treatment tank. A coolant tank is fixedly connected to the waste liquid treatment tank. A water pump is arranged on the top of the coolant tank. The water pump is electrically connected to the temperature sensor. The water pump is provided with an input end and an output end. The input end is connected to the inside of the coolant tank, and a liquid outlet pipe is fixedly connected to the output end. The liquid outlet pipe penetrates through the casing and is connected to the inside of the casing. A waste liquid recovery pipe is fixedly connected to the bottom of the casing, and the waste liquid recovery pipe is connected to the waste liquid treatment tank. A filter sleeve is arranged inside the waste liquid treatment tank, and a docking pipe is arranged on the waste liquid treatment tank. The docking pipe is connected to the coolant tank. Since this structure uses a heat conduction sleeve arranged outside the brake drum body, heat dissipation fins are arranged outside the heat conduction sleeve, and then the entire casing is wrapped outside the heat conduction sleeve. The casing pumps the coolant into the casing through the water pump. This structure is complex. Due to the small space distance between the brake drum and the wheel hub, it is not convenient for installation and use, and the cost is high. By wrapping the entire brake drum with the casing to form a sealed environment, it is not convenient for the heat dissipation fins inside the heat conduction sleeve to dissipate heat. Summary of the Invention

[0004] The purpose of the utility model is to provide an air-cooling cover for a drum brake and an air-cooled drum brake, which have a simple structure, are convenient for installation, and have a low cooling cost, aiming at the deficiencies of the existing technology.

[0005] One of the purposes of the utility model adopts the following technical solution:

[0006] An air-cooling cover for a brake drum, comprising an air-cooling cover body. The air-cooling cover body is of a hollow structure and is arranged circumferentially along the brake drum. The inner side wall of the air-cooling cover body has the same shape as the outer side surface of the brake drum. The air-cooling cover body is used to be sleeved on the brake drum, and the inner side wall of the air-cooling cover body is in contact with the outer side surface of the brake drum. A plurality of heat dissipation fins are distributed circumferentially on the outer side surface of the air-cooling cover body.

[0007] Further, the heat dissipation fins are spirally distributed on the air-cooling cover.

[0008] Further, the air-cooling cover body is made of aluminum alloy.

[0009] Further, one side of the air-cooling cover body is provided with a mounting portion for mounting on the brake drum.

[0010] One of the technical solutions adopted for the purpose of the present utility model is:

[0011] An air-cooled drum brake, comprising a brake drum and further comprising an air-cooling cover. The air-cooling cover adopts the air-cooling cover of any one of the above-mentioned brake drums. The air-cooling cover is sleeved on the brake drum, and the inner side wall of the air-cooling cover is in contact with the outer side surface of the brake drum.

[0012] Further, it further comprises a blower. The blower is arranged on the vehicle frame and is located on one side of the air-cooling cover.

[0013] Further, the blower is connected with a main air duct, and a plurality of branch air ducts are connected to the main air duct. A plurality of spray holes are opened on the branch air ducts.

[0014] Adopting the above technical solution has the following beneficial effects:

[0015] The structure of the present utility model is simple and convenient for installation. Only need to directly sleeve the air-cooling cover on the outer side surface of the existing brake drum, and utilize the inner side wall of the air-cooling cover to be in contact with the outer side surface of the brake drum body, so as to directly transfer the temperature of the brake drum to the air-cooling cover. The heat dissipation fins on the air-cooling cover rotate with the brake drum to realize air-cooling and temperature reduction. Without changing the structural settings of the existing brake drum, compared with the cooling structure of the existing brake, the change of the brake is reduced, and it is convenient to install the air-cooling cover on the existing brake drum. The setting of a water tank, a circulation pump and other electrical components is reduced, and the cost is lowered.

[0016] The air-cooling cover is made of aluminum alloy. By utilizing the good heat conduction performance of aluminum alloy, it is ensured that the heat of the brake drum can be quickly transferred to the outer surface of the air-cooling cover for temperature reduction.

[0017] The air-cooled drum brake is additionally provided with a blower to further improve the air-cooling effect through the blower.

[0018] The following is further described in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of Specific Example 1;

[0020] Figure 2 It is a schematic structural diagram of Specific Embodiment 1 sleeved on the brake drum;

[0021] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0022] Figure 4 It is a schematic structural diagram of Specific Example 2;

[0023] Figure 5 It is a schematic structural diagram of the branch air duct in Specific Embodiment 2.

[0024] In the drawings, 1 is the air-cooling cover body, 2 is the brake drum, 3 is the heat sink, 4 is the installation part, 5 is the main air duct, 6 is the branch air duct, and 6-1 is the spray hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will describe the specific embodiments of the present invention in more detail with reference to the schematic diagrams. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention. It should be understood that the drawings in the specification do not necessarily show the specific structure of the present invention in proportion, and the schematic features used to illustrate certain principles of the present invention in the drawings of the specification will also adopt a slightly simplified drawing method. The specific design features disclosed herein, such as specific dimensions, directions, positions, and shapes, will be partially determined by the specific application and use environment. Also, in the following described embodiments, sometimes the same reference numerals are used commonly between different drawings to represent the same parts or parts with the same functions, and the repeated description thereof is omitted. In this specification, similar reference numerals and letters are used to represent similar items. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. Specific Embodiment 1:

[0027] Refer to Figures 1 to 3As shown in the figure, an air-cooled cover for a brake drum includes an air-cooled cover body 1. The air-cooled cover body 1 is a hollow structure and is made of aluminum alloy. The air-cooled cover body 1 is arranged circumferentially along the brake drum. The inner side wall of the air-cooled cover body 1 has the same shape as the outer side surface of the brake drum 2. The air-cooled cover body 1 is used to be sleeved on the brake drum 2, and the inner side wall of the air-cooled cover body 1 is in contact with the outer side surface of the brake drum 2. One side of the air-cooled cover body 1 is provided with a mounting part 4 for mounting on the brake drum, and it is bonded to the brake drum through the mounting part 4. A plurality of heat dissipation fins 3 are distributed circumferentially on the outer side surface of the air-cooled cover body 1. By making use of the good heat transfer performance of aluminum alloy, the heat of the brake drum is quickly transferred to the air-cooled cover body, and heat dissipation is carried out quickly through the heat dissipation fins. The heat dissipation fins 3 are distributed in a spiral shape on the air-cooled cover body 1, and the heat dissipation effect is improved through the spiral structure. Specific Embodiment 2:

[0029] See Figures 4 to 5 As shown in the figure, an air-cooled drum brake includes a brake drum, a brake backplate and an air-cooled cover. The air-cooled cover adopts the air-cooled cover of the brake drum described in Specific Embodiment 1. The air-cooled cover is sleeved on the brake drum, and the inner side wall of the air-cooled cover is in contact with the outer side surface of the brake drum 2.

[0030] Possibly, it further includes a blower. The blower is fixed on the crossbeam of the vehicle frame. The blower is connected to a main air duct 5. A plurality of branch air ducts 6 are connected to the main air duct 5. A plurality of spray holes 6-1 are opened on the branch air ducts 6. The branch air ducts 6 are located on one side of the air-cooled cover 1. The blower sprays onto the air-cooled cover through the main air duct and the branch air ducts, further accelerating the cooling effect. Other features are the same as those in Specific Embodiment 1, so this specific embodiment is omitted here.

[0031] The working principle of the present utility model: The air-cooled cover is sleeved on the surface of the brake drum body. The mounting part of the air-cooled cover is coated with an adhesive and bonded to the brake drum body. Through the contact between the air-cooled cover and the surface of the brake drum body, the heat of the brake drum is directly transferred to the air-cooled cover. The heat dissipation fins on the air-cooled cover rotate to dissipate heat, cooling the brake drum. The structure is simple, the installation is convenient and fast, and the existing brake drum structure does not need to be changed, ensuring the cooling of existing vehicles and expanding the scope of use.

Claims

1. An air-cooling cover for a brake drum, characterized in that: It includes an air-cooling cover body which is of a hollow structure. The air-cooling cover body is arranged circumferentially along the brake drum. The inner side wall of the air-cooling cover body has the same shape as the outer side surface of the brake drum. The air-cooling cover body is used to be sleeved on the brake drum, and the inner side wall of the air-cooling cover body is in contact with the outer side surface of the brake drum. A number of heat dissipation fins are distributed circumferentially on the outer side surface of the air-cooling cover body.

2. The air-cooling cover of the brake drum according to claim 1, characterized in that: The heat dissipation fins are spirally distributed on the air-cooling cover.

3. The air-cooling cover of the brake drum according to claim 1, characterized in that: The air-cooling cover body is made of aluminum alloy.

4. The air-cooling cover of the brake drum according to claim 1, characterized in that: One side of the air-cooling cover body is provided with a mounting portion for mounting on the brake drum.

5. An air-cooled drum brake, comprising a brake drum, characterized in that: It further includes an air-cooling cover which is the air-cooling cover of the brake drum according to any one of claims 1 to 4. The air-cooling cover is sleeved on the brake drum, and the inner side wall of the air-cooling cover is in contact with the outer side surface of the brake drum.

6. The air-cooled drum brake according to claim 5, wherein: It further includes a blower which is arranged on the vehicle frame and is located on one side of the air-cooling cover.

7. The air-cooled drum brake according to claim 6, characterized in that: The blower is connected with a main air duct, and a plurality of branch air ducts are connected to the main air duct. A number of spray holes are opened on the branch air ducts.

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