High-strength wear-resistant gray cast iron brake drum

Abstract

The utility model provides a high-strength wear-resistant gray cast iron brake drum which comprises a brake bottom plate fixed with an axle, two brake shoes which are oppositely arranged are hinged on the brake bottom plate, a brake drum which is braked through friction of the two brake shoes is rotatably arranged on the brake bottom plate, and a spray assembly is arranged in the brake bottom plate. The spraying assembly comprises an annular water pipe coaxial with the brake bottom plate, the annular water pipe is located between the two brake shoes, a plurality of spray nozzles are arranged on the annular water pipe at equal intervals, a water inlet pipe is installed at the water inlet end of the annular water pipe, the other end of the water inlet pipe penetrates through the back of the brake bottom plate and then is communicated into a water tank on the vehicle, and water outlets are formed in the brake shoes. The spraying assembly is arranged on the brake bottom plate, the spraying assembly is started to spray mist, water mist is dispersed in the brake drum and makes contact with the surface of the brake drum, the brake drum is cooled, air continuously enters the water outlet to accelerate air flowing, the cooling effect is improved, and meanwhile the water mist is heated, evaporated and collected into water drops to be discharged in time through the water outlet.

Description

Technical Field

[0001] This utility model relates to the field of braking system technology, specifically a high-strength wear-resistant gray cast iron brake drum. Background Technology

[0002] High-strength, wear-resistant gray cast iron brake drums are commonly used in truck braking systems. The brake drum's base plate is typically fixed to the axle flange or the corresponding structure of the suspension system by bolts or other types of fasteners. It is used to install and position the brake shoes, brake wheel cylinders, return springs, and other braking system components. The brake drum is connected to the wheel and rotates with it. When braking is required, the brake shoes on the brake base plate expand outward and contact the inner surface of the brake drum, using friction to slow down or stop the wheel's rotation. They typically possess good wear resistance and strength to meet the frequent braking needs of trucks under heavy loads.

[0003] During braking, especially on continuous downhill sections or with frequent braking, the brake drum generates a significant amount of heat due to friction with the brake pads, causing its temperature to rise. Sustained excessively high temperatures can weaken braking performance, a condition known as "heat fade," and in severe cases, may even impair the normal operation of the braking system or lead to safety accidents. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength, wear-resistant gray cast iron brake drum, which aims to solve the problem in the prior art that frequent braking can easily lead to an increase in brake drum temperature, and if cooling measures are not taken, the continuously high temperature will lead to a weakening of the braking effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength wear-resistant gray cast iron brake drum, comprising a brake base plate fixed to the axle, two opposing brake shoes hinged to the brake base plate, a brake drum rotatably mounted on the brake base plate and braked by friction between the two brake shoes, a spray assembly disposed inside the brake base plate, the spray assembly comprising an annular water pipe coaxially disposed with the brake base plate and located between the two brake shoes, a plurality of water mist nozzles equidistantly disposed on the annular water pipe, an inlet pipe installed at the inlet end of the annular water pipe, the other end of the inlet pipe passing through the back of the brake base plate and connected to the water tank on the vehicle, and a drain outlet provided on the brake shoe.

[0006] Preferably, the brake base plate is provided with a brake cylinder for controlling the two brake shoes to flip outward and contact the brake drum.

[0007] Preferably, a mounting plate is fixedly provided on the brake base plate, and a control button is provided on the mounting plate. One of the brake shoes is provided with a pressing rod. When the brake cylinder controls the brake shoe to flip, it can drive the pressing rod to press the control button. The control button is electrically connected to the water pump in the water tank.

[0008] Preferably, the water inlet pipe located inside the brake drum is made of stainless steel, and the water inlet pipe located inside the brake drum is made of PVC flexible hose, and is connected by a sleeve.

[0009] The beneficial effects of this utility model are:

[0010] 1. When in use, this utility model is installed on the brake base plate. When the spray component is activated, water mist is dispersed inside the brake drum and comes into contact with the surface of the brake drum to cool the brake drum. Air is continuously introduced into the drain outlet to accelerate the gas flow and improve the cooling effect. At the same time, the water mist is heated, evaporates and collects into water droplets, which can be discharged in time through the drain outlet.

[0011] 2. In use, this utility model has a mounting plate fixed on the brake base plate, and a control button on the mounting plate. One of the brake shoes is equipped with a pressing rod. When the brake cylinder controls the brake shoe to flip, it can drive the pressing rod to press the control button and start the water pump in the water tank. When the brake shoe resets, the pressing rod separates from the control button and can automatically shut down the water pump to save water. Attached Figure Description

[0012] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein:

[0013] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the structure after removing the brake drum in a specific embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the annular water pipe, a specific embodiment of this utility model.

[0016] In the diagram: 1. Brake base plate; 2. Brake drum; 3. Brake shoe; 4. Press lever; 5. Brake cylinder; 6. Water inlet pipe; 7. Drain outlet; 8. Circular water pipe; 9. Water mist nozzle; 10. Mounting plate; 11. Control button. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0019] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0020] like Figure 1-3 As shown, a high-strength wear-resistant gray cast iron brake drum 2 includes a brake base plate 1 fixed to the axle. Two opposing brake shoes 3 are hinged to the brake base plate 1. The brake drum 2, which is braked by friction between the two brake shoes 3, is rotatably mounted on the brake base plate 1. A spray assembly is provided inside the brake base plate 1. The spray assembly includes an annular water pipe 8 coaxially arranged with the brake base plate 1 and located between the two brake shoes 3. Multiple water mist nozzles 9 are equidistantly arranged on the annular water pipe 8. A water inlet pipe 6 is installed at the water inlet end of the annular water pipe 8. The other end of the water inlet pipe 6 passes through the back of the brake base plate 1 and connects to the water tank on the vehicle. A drain outlet 7 is provided on the brake shoes 3.

[0021] In this embodiment, a spray assembly is installed on the brake base plate 1. When the spray assembly is activated, water mist is dispersed inside the brake drum 2 and comes into contact with the surface of the brake drum 2 to cool the brake drum 2. Air continuously enters the drain outlet 7 to accelerate the gas flow and improve the cooling effect. At the same time, the water mist is heated, evaporates, and collects into water droplets before being discharged in time through the drain outlet 7.

[0022] like Figure 2 As shown, a brake cylinder 5 is provided on the brake base plate 1 to control the two brake shoes 3 to flip outward and contact the brake drum 2. A mounting plate 10 is fixedly provided on the brake base plate 1, and a control button 11 is provided on the mounting plate 10. One of the brake shoes 3 is provided with a pressing rod 4. When the brake cylinder 5 controls the brake shoe 3 to flip, it can drive the pressing rod 4 to press the control button 11. The control button 11 is electrically connected to the water pump in the water tank.

[0023] In this embodiment, when one of the brake shoes 3 expands outward, it drives the pressing rod 4 to move. The head of the pressing rod 4 presses the control button 11. The control button 11 can control the water pump in the water tank to start. When the brake shoe 3 resets, the pressing rod 4 separates from the control button 11. At this time, the water pump is turned off to save water.

[0024] like Figure 3 As shown, the water inlet pipe 6 located inside the brake drum 2 is made of stainless steel, and the water inlet pipe 6 located inside the brake drum 2 is made of PVC hose, and is connected by a sleeve.

[0025] In this embodiment, the temperature of the brake drum 2 rises instantaneously during braking. The water inlet pipe 6 located inside the brake drum 2 is made of stainless steel, which has good corrosion resistance and high strength. It will not be damaged due to temperature changes. At the same time, it has poor thermal conductivity and will not transfer heat to the PVC hose section instantly, thus preventing damage to the hose.

[0026] Working principle: When the vehicle brakes, the brake cylinder 5 controls the two brake shoes 3 to expand outward and contact the inner surface of the brake drum 2. The friction force is used to slow down or stop the rotation of the wheel. When one of the brake shoes 3 expands outward, it drives the pressing rod 4 to move. The head of the pressing rod 4 presses the control button 11. The control button 11 controls the water pump in the water tank to start, and the water in the water tank is transported into the annular water pipe 8 through the water inlet pipe 6 and sprayed out through the water mist nozzle 9. The water mist is dispersed in the brake drum 2 and contacts the surface of the brake drum 2 to cool the brake drum 2. Air is continuously introduced into the drain outlet 7 to accelerate the gas flow and improve the cooling effect. At the same time, the water mist is heated and evaporated and collected into water droplets, which can be discharged in time through the drain outlet 7.

[0027] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0029] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-strength, wear-resistant gray cast iron brake drum, comprising a brake base plate (1) fixed to an axle, two opposing brake shoes (3) hinged to the brake base plate (1), and a brake drum (2) rotatably mounted on the brake base plate (1) for braking by friction between the two brake shoes (3), characterized in that, A spray assembly is provided inside the brake base plate (1). The spray assembly includes an annular water pipe (8) coaxially arranged with the brake base plate (1) and the annular water pipe (8) is located between the two brake shoes (3). Multiple water mist nozzles (9) are equidistantly arranged on the annular water pipe (8). A water inlet pipe (6) is installed at the water inlet end of the annular water pipe (8). The other end of the water inlet pipe (6) passes through the back of the brake base plate (1) and is connected to the water tank on the vehicle. A drain outlet (7) is provided on the brake shoe (3).

2. The high-strength wear-resistant gray cast iron brake drum according to claim 1, characterized in that, The brake base plate (1) is provided with a brake cylinder (5) for controlling the two brake shoes (3) to flip outward and contact the brake drum (2).

3. A high-strength wear-resistant gray cast iron brake drum according to claim 2, characterized in that, A mounting plate (10) is fixedly installed on the brake base plate (1). A control button (11) is installed on the mounting plate (10). A pressing rod (4) is installed on one of the brake shoes (3). When the brake cylinder (5) controls the brake shoe (3) to flip, it can drive the pressing rod (4) to press the control button (11). The control button (11) is electrically connected to the water pump in the water tank.

4. A high-strength wear-resistant gray cast iron brake drum according to claim 1, characterized in that, The water inlet pipe (6) located inside the brake drum (2) is made of stainless steel, and the water inlet pipe (6) located inside the brake drum (2) is made of PVC hose and connected by a sleeve.

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