Cooling cover of drum brake and drum brake

Abstract

The cooling cover of the drum brake comprises a cooling cover body, the cooling cover body is of a hollow structure, the cooling cover body is used for being arranged on a brake drum in a sleeved mode, a certain distance is reserved between the inner side wall of the cooling cover body and the outer side face of the brake drum, and a hollow cooling liquid cavity is formed. A sealing end plate is arranged on the end face of the cooling cover body, a sealing ring is arranged between the cooling cover body and the sealing end plate, a water inlet hole and an exhaust hole are formed in the upper end portion of the sealing end plate, and the water inlet hole is used for being connected with a cooling liquid box. 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 a cooling cover of a drum brake and a drum brake. Background Art

[0002] Large trucks mostly use drum brakes because they provide relatively high friction braking force. Drum brakes primarily consist of components such as the brake drum, brake shoes, friction pads, and wheel cylinders. However, existing brake drums generate significant heat during braking. If this heat is not dissipated promptly, the friction pads and drum can overheat, potentially damaging them over time. Therefore, brake drums require heat dissipation, and three existing heat dissipation methods exist: air cooling, water cooling, and oil cooling.

[0003] For water-cooling heat dissipation, some use water spray pipes and nozzles to directly spray the brake pad metal backing plate and brake drum to cool them down. Cooling oil is directly sprayed on the outer surface of the brake drum. Since the cooling water falls directly to the ground, when driving on cold and icy roads, the sprayed cooling water will freeze on the ground, which may cause the vehicle to slip and affect braking performance. Some are equipped with cooling devices, such as the one with publication number: CN 216659856 The heat dissipation device of U comprises a drum brake device with a heat dissipation structure, comprising a drum brake body and a sleeve, a heat conductive sleeve is provided on the outside of the drum brake body, the heat conductive sleeve is fixedly connected with heat dissipation fins, the heat dissipation fins are in contact with the drum brake body, the sleeve is provided with heat dissipation holes, the inner surface of the sleeve is provided with a temperature sensor, the outside of the sleeve is fixedly connected with two symmetrically distributed fixing brackets, the two fixing brackets are fixedly connected with a waste liquid treatment box at one end away from the sleeve, the waste liquid treatment box is fixedly connected with a coolant tank, a water pump is provided on the top of the coolant tank, the water pump is electrically connected to the temperature sensor, an input end and an output end are provided on the water pump, the input end is connected to the coolant tank, the output end is fixedly connected with a liquid outlet pipe, the liquid outlet pipe passes through the sleeve and is connected to the sleeve, a waste liquid recovery pipe is fixedly connected to the bottom of the sleeve, the waste liquid recovery pipe is connected to the waste liquid treatment box, a filter sleeve is provided in the waste liquid treatment box, a docking pipe is provided on the waste liquid treatment box, and the docking pipe is connected to the coolant tank. Since this structure uses a heat-conducting sleeve to be set on the outside of the brake drum body, and then the entire sleeve is wrapped around the heat-conducting sleeve, the sleeve pumps the coolant into the sleeve through a water pump. The structure is complicated to set up, and a sealed environment is formed by wrapping the entire brake drum by the sleeve. It is not convenient for the heat dissipation of the heat dissipating fins in the heat-conducting sleeve, and more electrical components are set up, which is costly. Summary of the Invention

[0004] The purpose of the utility model is to provide a drum brake cooling cover and a drum brake in view of the deficiencies in the prior art, which have simple structure, are easy to install and have low cooling cost.

[0005] One of the purposes of this utility model is to adopt a technical solution:

[0006] A cooling cover for a drum brake, characterized in that it includes a cooling cover body, the cooling cover body being a hollow structure, the cooling cover body being used to be sleeved on the brake drum, a certain distance being left between the inner side wall of the cooling cover body and the outer side surface of the brake drum to form a hollow coolant chamber, the end face of the cooling cover body being provided with a sealing end plate, a sealing ring being provided between the cooling cover body and the sealing end plate, the upper end portion of the sealing end plate being provided with a water inlet hole and an exhaust hole, the water inlet hole being used to be connected to a coolant tank.

[0007] Furthermore, a sealing ring positioning groove is provided on the sealing end plate, and the sealing ring is arranged in the sealing ring positioning groove.

[0008] Furthermore, the sealing ring is an oil seal.

[0009] Furthermore, the cooling cover body is made of aluminum alloy.

[0010] Furthermore, the position of the water inlet is lower than the position of the air exhaust hole.

[0011] One of the purposes of this utility model is to adopt a technical solution:

[0012] A drum brake comprises a brake drum body and a brake base plate, and also comprises a coolant tank and a cooling cover. The cooling cover adopts the cooling cover of any of the above-mentioned drum brakes, and a certain distance is left between the inner side wall of the cooling cover and the outer side surface of the brake drum body to form a hollow coolant cavity; the coolant tank is connected to the water inlet hole of the cooling cover through a water inlet pipe.

[0013] Furthermore, the brake base plate is provided with an outwardly extending extension portion, and the extension portion forms a sealing end plate of the cooling cover.

[0014] Furthermore, the coolant tank is mounted on the vehicle frame.

[0015] Furthermore, a liquid level gauge is provided on the coolant tank, or a liquid level sensor is provided on the coolant tank.

[0016] Furthermore, the coolant tank is higher than the water inlet hole of the cooling cover body.

[0017] The above technical solution has the following beneficial effects:

[0018] The present invention has a simple structure and is easy to install. The cooling cover body is simply placed on the outer side of an existing brake drum. A hollow cooling liquid cavity is formed by the gap between the inner sidewall of the cooling cover body and the outer side of the brake drum body. Coolant is then filled into the cooling liquid cavity, transferring heat generated by braking directly to the cooling liquid cavity of the cooling cover. The heat is then cooled by the coolant in the cooling cover. This eliminates the need to modify the existing brake drum structure, reduces brake modifications compared to existing brake cooling structures, and facilitates installation of the cooling cover on existing brake drums. Furthermore, the coolant does not drop directly to the ground, and vapor evaporated by the coolant is discharged through the exhaust port. This eliminates the need for recycling the coolant, reduces the need for circulating pumps and other electrical components, and reduces cooling costs.

[0019] The cooling cover body is made of aluminum alloy, which has good thermal conductivity to ensure that the heat of the brake drum can be quickly transferred to the outer surface of the cooling cover for cooling.

[0020] The following is a further description with reference to the accompanying drawings and specific implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of this specific example 1;

[0022] Figure 2 for Figure 1 Middle CC section view;

[0023] Figure 3 for Figure 1 Right view of;

[0024] Figure 4 This is a schematic structural diagram of this specific example 2;

[0025] Figure 5 for Figure 4 AA cross-sectional diagram;

[0026] Figure 6 of Figure 5 Enlarged view of point B in the middle.

[0027] In the accompanying drawings, 1 is the brake drum body, 2 is the bolt hole, 3 is the cooling cover body, 4 is the sealing end plate, 5 is the water inlet hole, 6 is the exhaust hole, 7 is the axle, 8 is the first sealing ring, and 9 is the second sealing ring. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in illustrating 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 illustrative features used to illustrate certain principles of the present invention in the drawings in the specification may also be drawn in a slightly simplified manner. The specific design features of the present invention disclosed herein include, for example, specific dimensions, directions, positions and shapes, which will be determined in part by the specific environment in which they are to be applied and used. In addition, in the embodiments described below, the same figure mark is sometimes used in common between different drawings to represent the same part or a part with the same function, and its repeated description is omitted. In this specification, similar numbers 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 embodiments

[0029] See also Figures 1 to 3 As shown, a drum brake cooling hood includes a cooling hood body 3. The cooling hood body 3 is a hollow structure designed to be mounted on the brake drum. A certain distance is left between the inner sidewall of the cooling hood body 3 and the outer side of the brake drum, forming a hollow coolant chamber. The distance between the inner sidewall of the cooling hood body 3 and the outer side of the brake drum is 20-35 mm. The cooling hood body 3 is made of aluminum alloy and its shape corresponds to the outer shape of the brake drum. In this specific embodiment, the distance between the inner sidewall of the cooling hood body 3 and the outer side of the brake drum is 25 mm. A sealing end plate 4 is provided on the end face of the cooling hood body 3. A sealing ring is provided between the cooling hood body 3 and the sealing end plate 4. The sealing end plate 4 is provided with bolt holes 2 for connecting to the brake, facilitating bolt installation on the brake. The sealing end plate is provided with a sealing ring positioning groove, in which the sealing ring is positioned. The sealing ring is an oil seal. In this specific embodiment, a first sealing ring 8 and a second sealing ring 9 are provided between the cooling cover body 3 and the sealing end plate.

[0030] Alternatively, a brake base plate may be used in place of sealing end plate 4. The brake base plate of the brake can be extended outward, with the extended portion forming the sealing end plate of the cooling hood. The brake base plate is provided with water inlet and exhaust holes. This not only seals the coolant chamber of the cooling hood but also provides dust protection compared to the existing brake base plate, thereby reducing costs. In this specific embodiment, a brake base plate is used in place of sealing end plate 4.

[0031] The upper end of the sealing end plate 4 is provided with a water inlet 5 and an exhaust hole 6. The water inlet 5 is positioned lower than the exhaust hole 6. The water inlet 5 is connected to the coolant tank to ensure that the liquid entering the cooling cover does not flow out of the exhaust hole 6. The coolant filled in the cooling liquid cavity of the cooling cover body 3 can be antifreeze, cooling water, or cooling oil, without limitation, thereby expanding the scope of use. Specific embodiments

[0032] See also Figures 1 to 6 As shown, a drum brake comprises a brake drum body 1, a brake base plate, brake shoes, a coolant tank, and a cooling hood. The drum brake is mounted on an axle 7. The cooling hood is the cooling hood of the drum brake described in Specific Example 1. A certain distance is left between the inner side wall of the cooling hood and the outer side surface of the brake drum body 1, forming a hollow coolant chamber. The coolant tank is mounted on the vehicle frame to facilitate the addition of coolant to the coolant tank. A liquid level gauge is provided on the coolant tank to facilitate direct observation of the amount of coolant in the coolant tank. Alternatively, a liquid level sensor is provided on the coolant tank, which is electrically connected to the vehicle controller and displays the liquid level information on the vehicle controller's display screen. The coolant tank is higher than the water inlet of the cooling hood and is connected to the water inlet 5 of the cooling hood via an inlet pipe to ensure automatic refilling of the cooling hood.

[0033] Optionally, the brake base plate may be provided with an outwardly extending extension, which forms the sealing end plate 3 of the cooling hood. The brake base plate may be provided with a water inlet and exhaust holes, replacing the sealing end plate. In this embodiment, the brake base plate replaces the sealing end plate. Other features are identical to those in Embodiment 1 and are therefore omitted here.

[0034] The working principle of the utility model is as follows: a cooling cover is sleeved on the surface of the brake drum body, one end of the cooling cover is bonded to the brake drum body with an adhesive, and the other end is installed on the brake through the bolts of the sealing end plate. The sealing end plate does not rotate, and a water inlet hole and an exhaust hole are opened on the sealing end plate. The coolant contained in the coolant tank automatically flows into the cooling cover, and the coolant cavity between the cooling cover and the brake drum body is utilized to cool the coolant in the cooling cover, and the water vapor after the coolant evaporates is discharged through the exhaust hole.

Claims

1. A cooling cover for a drum brake, characterized in that: It includes a cooling cover body, which is a hollow structure. The cooling cover body is used to be mounted on the brake drum. A certain distance is left between the inner side wall of the cooling cover body and the outer side surface of the brake drum to form a hollow coolant cavity. The end face of the cooling cover body is provided with a sealing end plate. A sealing ring is provided between the cooling cover body and the sealing end plate. The upper end of the sealing end plate is provided with a water inlet hole and an exhaust hole. The water inlet hole is used to connect to the coolant tank.

2. The cooling cover of the drum brake according to claim 1, characterized in that: A sealing ring positioning groove is provided on the sealing end plate, and the sealing ring is arranged in the sealing ring positioning groove.

3. The cooling cover of a drum brake according to claim 1 or 2, characterized in that: The sealing ring is an oil seal.

4. The cooling cover of a drum brake according to claim 1, characterized in that: The cooling cover body is made of aluminum alloy.

5. The cooling cover of the drum brake according to claim 1, characterized in that: The position of the water inlet is lower than that of the air outlet.

6. A drum brake comprising a brake drum body and a brake base plate, characterized in that: It also includes a coolant tank and a cooling cover, wherein the cooling cover adopts the cooling cover of the drum brake described in any one of claims 1 to 5, and a certain distance is left between the inner side wall of the cooling cover and the outer side surface of the brake drum body to form a hollow coolant cavity; the coolant tank is connected to the water inlet hole of the cooling cover through a water inlet pipe.

7. The drum brake according to claim 6, characterized in that: The brake base plate is provided with an outwardly extending extension portion, which forms a sealing end plate of the cooling cover.

8. The drum brake according to claim 6, characterized in that: The coolant tank is mounted on the vehicle frame.

9. The drum brake according to claim 6, characterized in that: The coolant tank is provided with a liquid level gauge, or the coolant tank is provided with a liquid level sensor.

10. The drum brake according to claim 6, characterized in that: The coolant tank is higher than the water inlet hole of the cooling cover body.

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