Brake high-frequency fatigue loading test bench based on servo motor direct drive

Abstract

The invention relates to the technical field of brake production, in particular to a servo motor direct drive-based brake high-frequency fatigue loading test board, which comprises a servo motor, a servo motor is fixedly connected to the inner side of the cylinder; a connecting frame is fixedly connected to the inner side of the cylinder; a gearbox is fixedly connected to the connecting frame, and an output shaft of the gearbox is fixedly connected with an input shaft of the servo motor; a bearing is fixedly connected to the connecting frame; a connecting shaft rod is connected to the inner side of the bearing and fixedly connected with an input shaft of the gearbox. Mineral lubricating oil leaked from the bearing is intercepted through the circular ring and prevented from spreading to a high-temperature area on the left portion of the connecting shaft rod, so that the spontaneous combustion risk in the testing process is reduced, safety is improved, meanwhile, air used for cooling the brake disc is guided through the baffle, the air flows through the surface of the connecting shaft rod at a high speed, and the service life of the brake disc is prolonged. In addition, the part of air flow can also be used for heat dissipation of the gearbox and the servo motor, and practicability is high.

Description

Technical Field

[0001] This invention relates to the technical field of brake manufacturing. More specifically, this invention relates to a high-frequency fatigue loading test bench for brakes based on servo motor direct drive. Background Technology

[0002] During actual brake operation, the friction between the brake pads and brake disc continuously generates a large amount of heat. Especially under high-frequency, high-intensity continuous braking conditions, the heat generated often far exceeds the system's heat dissipation capacity, causing the brake temperature to rise rapidly to 600℃–800℃ or even higher. Under such extreme high-temperature environments, braking materials are prone to thermal degradation, manifested as a significant decrease in the coefficient of friction, which in turn leads to a sharp reduction in braking performance, the so-called "thermal fade" phenomenon. Therefore, it is necessary to test the high-frequency braking performance of the brake. However, after long-term use, the bearing seal lips of existing test benches will show wear, causing lubricating oil leakage from the bearing area and adhering to the shaft surface. If the lubricating oil is close to the high-temperature brake disc, there is a risk of ignition, posing a serious safety hazard. Summary of the Invention

[0003] To overcome the shortcomings of existing test benches where lubricating oil may leak from the bearings and adhere to the shaft surface after long-term use, posing a risk of ignition if the lubricating oil is near the high-temperature brake disc, thus creating a serious safety hazard, this invention provides a high-frequency fatigue loading test bench for brakes based on direct drive of a servo motor.

[0004] The technical solution is as follows: A high-frequency fatigue loading test bench for brakes based on direct drive of a servo motor includes a cylinder and several bases fixed to the cylinder; it also includes a servo motor; the servo motor is fixed to the inner side of the cylinder; a connecting frame is fixed to the inner side of the cylinder; a gearbox is fixed to the connecting frame, and the output shaft of the gearbox is fixed to the input shaft of the servo motor; a bearing is fixed to the connecting frame; a connecting shaft is connected to the inner side of the bearing, and the connecting shaft is fixed to the input shaft of the gearbox; a speed sensor is installed on the connecting shaft; a ring is fixed to the connecting shaft; a baffle is connected to the inner side of the cylinder; an air supply assembly is installed on the cylinder; the air supply assembly is used to supply air to the inner side of the cylinder.

[0005] As a further preferred option, a temperature sensor and a smoke sensor are installed inside the cylinder on the side near the brake disc mounting position.

[0006] As a further preferred option, it also includes electric push rods; several electric push rods are fixedly connected to the inside of the cylinder, and the concave end of the electric push rods is fixedly connected to the baffle.

[0007] As a further preferred embodiment, the air supply assembly includes a side cover, a duct, a first connecting block, a second connecting block, and a pin; the side cover is rotatably connected to the cylinder; the duct passes through the side cover; the first connecting block is fixedly connected to the side cover; the second connecting block is fixedly connected to the cylinder, and the second connecting block is in contact with the first connecting block; the first connecting block and the second connecting block are connected by a pin that can be inserted and removed together.

[0008] As a further preferred option, it also includes a handle; a handle is fixed to the side cover.

[0009] As a further preferred option, it also includes fins; several fins are fixed to the connecting shaft.

[0010] As a further preferred option, the side of the ring closest to the baffle is made of a heat-conducting material, and the side of the ring furthest from the baffle is made of a heat-insulating material; the side of the ring closest to the baffle is fixedly connected to the corresponding fin.

[0011] As a further preferred option, the baffle is cone-shaped.

[0012] As a further preferred option, a dustproof net is also included; a dustproof net is fixed to the cylinder.

[0013] As a further preferred option, the pin is chamfered.

[0014] The beneficial effects are as follows: First, the ring intercepts the mineral lubricating oil leaking from the bearing, preventing it from spreading to the high-temperature area on the left side of the connecting shaft, thereby reducing the risk of spontaneous combustion during testing and improving safety. At the same time, the baffle guides the air used to cool the brake disc, allowing it to flow at high speed across the surface of the connecting shaft, cooling the left side of the connecting shaft and further reducing the risk of spontaneous combustion. In addition, this airflow can also be used for cooling the gearbox and servo motor, making it highly practical. 2. The rings and baffles used to intercept mineral lubricating oil can also be used to isolate the inner side of the cylinder to prevent open flames from spreading to the right side of the cylinder and igniting electrical components such as servo motors and gearboxes, thereby further improving safety performance. Third, when air passes through the gap between the connecting shaft and the baffle, it will come into contact with the fins and the left side of the ring, thereby improving the heat dissipation effect on the connecting shaft. At the same time, during the test, the connecting shaft will drive the fins to make circular motion, causing the side of the fins to collide with the air flowing to the left, which is conducive to improving the contact effect between the air and the fins, thereby improving the heat dissipation effect, further reducing the risk of spontaneous combustion, and ensuring strong safety. Fourth, the baffle is set in a conical shape. The baffle's inclined surface guides the airflow, allowing the air on the right side of the inner side of the cylinder to flow more smoothly to the left, thus ensuring the heat dissipation effect on the connecting shaft and brake disc. Attached Figure Description

[0015] Figure 1 This invention presents a schematic diagram of the high-frequency fatigue loading test bench for brakes based on direct drive of a servo motor. Figure 2 A schematic diagram of the inner side of the cylinder of the present invention is shown; Figure 3 This shows a first-view structural schematic diagram of the air supply assembly of the present invention; Figure 4 This diagram illustrates a second perspective view of the air supply assembly of the present invention. Figure 5 A schematic diagram of the structure of the fin of the present invention is shown; Figure 6 A schematic diagram of the structure of the ring of the present invention is shown.

[0016] The labels in the diagram are as follows: 1-Cylinder, 2-Base, 3-Servo motor, 4-Connecting frame, 5-Gearbox, 6-Bearing, 7-Connecting shaft, 8-Brake disc, 9-Brake, 10-Ring, 11-Baffle, 200-Electric push rod, 201-Side cover, 202-Pipe, 203-Connecting block one, 204-Connecting block two, 205-Pin, 206-Handle, 207-Fin, 208-Dustproof net. Detailed Implementation

[0017] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used in this document refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, terms such as "connection" and "linkage" in this application include both direct and indirect connections (linkages).

[0018] Example 1: A high-frequency fatigue loading test bench for brakes based on direct drive of a servo motor, such as... Figures 1-6 As shown, the assembly includes a cylinder 1 and a base 2; two bases 2 are bolted to the cylinder 1; it also includes a servo motor 3, a connecting frame 4, a gearbox 5, a bearing 6, a connecting shaft 7, a ring 10, a baffle 11, and an air supply assembly; the servo motor 3 is bolted to the inner side of the cylinder 1; the connecting frame 4 is bolted to the inner side of the cylinder 1, and the connecting frame 4 is made of alloy material; the gearbox 5 is bolted to the connecting frame 4, and the output shaft of the gearbox 5 is fixedly connected to the input shaft of the servo motor 3; the bearing 6 is fixedly connected to the connecting frame 4; the connecting shaft 7 is connected to the inner side of the bearing 6, and the connecting shaft 7 is fixedly connected to the input shaft of the gearbox 5, and the servo motor 3 drives the connecting shaft 7 to rotate through the gearbox 5; a speed sensor is installed on the connecting shaft 7; a ring 10 is fixedly connected to the connecting shaft 7; a baffle 11 is connected to the inner side of the cylinder 1; and an air supply assembly is installed on the cylinder 1.

[0019] A temperature sensor and a smoke sensor are installed inside the cylinder 1 on the side near the mounting position of the brake disc 8 to monitor the temperature and combustion status of the brake disc 8.

[0020] It also includes an electric push rod 200; two electric push rods 200 are fixedly connected to the inner side of the cylinder 1, and the concave end of the electric push rod 200 is fixedly connected to the baffle 11, and the baffle 11 is moved by the electric push rod 200.

[0021] The air supply assembly includes a side cover 201, a pipe 202, a first connecting block 203, a second connecting block 204, and a pin 205. The side cover 201 is rotatably connected to the cylinder 1 and is made of alloy material. The pipe 202 passes through the side cover 201 and supplies air into the cylinder 1 through the pipe 202 to cool the brake disc 8. The first connecting block 203 is welded to the side cover 201. The second connecting block 204 is welded to the cylinder 1 and contacts the first connecting block 203. The first connecting block 203 and the second connecting block 204 are connected by a pin 205.

[0022] It also includes a handle 206; the handle 206 is bolted to the side cover 201, and the side cover 201 can be rotated manually by the handle 206, making it more convenient to apply force.

[0023] First, manually pull the pin 205 out of connecting block 1 203 and connecting block 204. Then, rotate the side cover 201 using the handle 206 to open it. Next, install the brake disc 8 to be tested on the connecting shaft 7, placing the brake 9 to be tested inside the cylinder 1. Then, close the side cover 201 and reinsert the pin 205 into connecting block 1 203 and connecting block 204 to fix the side cover 201 to the cylinder 1. Then, connect the external air pump to the pipe 202 via a hose to complete the preparation. During testing, start the servo motor 3. The servo motor 3 drives the connecting shaft 7 to rotate via the gearbox 5. The connecting shaft 7 drives the brake disc 8 to rotate, and the brake 9 applies high-frequency braking to the brake disc 8. The speed sensor on the connecting shaft 7 monitors the speed decay of the connecting shaft 7 to determine the braking effect. In the process, an external air pump draws air into pipe 202 through a hose, allowing outside air to flow in from the right end of cylinder 1, i.e., the end closest to servo motor 3. The air then flows to the left within pipe 202, and then flows into the external air pump through pipe 202 and hose in sequence. During this process, the air flows over the surface of brake disc 8, dissipating heat from the brake disc 8. With prolonged use, the lip of the seal on bearing 6 will wear, causing the mineral lubricating oil inside bearing 6 to leak and spread to the surface of connecting shaft 7. In addition, during the test, the heat generated by braking of brake disc 8 is conducted to connecting shaft 7, causing connecting shaft 7 to be in a high-temperature state. The temperature of connecting shaft 7 is higher the closer it is to brake disc 8. If left uncontrolled, the heat will be conducted along connecting shaft 7 to bearing 6, which can easily accelerate the aging of the seal lip. In a confined space, there is even a probability of igniting the spilled mineral lubricating oil.

[0024] To avoid the above phenomenon, on the one hand, the mineral lubricating oil on the surface of the connecting shaft 7 is intercepted by the ring 10, suppressing the overflow range of the mineral lubricating oil and preventing it from continuing to spread to the left and approaching the high-temperature area near the left end of the connecting shaft 7. On the other hand, when the air in the right side of the inner side of the cylinder 1 flows through the middle of the baffle 11 to the left side of the inner side of the cylinder 1, the air velocity will increase significantly at this point because the gap width between the baffle 11 and the connecting shaft 7 is much smaller than the inner diameter of the cylinder 1. This causes the air to adhere to the surface of the connecting shaft 7 and flow to the left at high speed, improving the air pressure on the connecting shaft 7. The cooling effect on the left side of the connecting shaft 7 also reduces the risk of spontaneous combustion. During use, the ring 10 intercepts the mineral lubricating oil leaking from the bearing 6, preventing it from spreading to the high-temperature area on the left side of the connecting shaft 7, thereby reducing the risk of spontaneous combustion during testing and improving safety. At the same time, the baffle 11 guides the air used to dissipate heat from the brake disc 8, allowing it to flow at high speed across the surface of the connecting shaft 7, cooling the left side of the connecting shaft 7 and further reducing the risk of spontaneous combustion. In addition, this airflow can also be used to dissipate heat from the gearbox 5 and the servo motor 3, making it highly practical. During the test, the brake 9 is prone to leakage due to high-frequency overload operation. The hydraulic oil in the brake 9 dripping onto the high-temperature brake disc 8 can cause spontaneous combustion. When the brake disc 8 spontaneously combusts, the temperature sensor and smoke sensor installed on the side of the cylinder 1 near the mounting position of the brake disc 8 can detect abnormally high temperatures on the surface of the brake disc 8, accompanied by smoke products from the combustion of hydraulic oil, indicating that the surface of the brake disc 8 is burning. At this time, the servo motor 3 needs to be turned off, the brake 9 stops braking, and the electric push rod... 200 drives the baffle 11 to move to the left, causing the baffle 11 to contact the ring 10. At this time, the ring 10 and the baffle 11 cooperate to isolate the inner side of the cylinder 1, thereby preventing the open flame from spreading to the right side of the cylinder 1 and igniting the servo motor 3 and gearbox 5 and other electrical components, further improving safety performance. In use, the ring 10 and the baffle 11, which are used to intercept mineral lubricating oil, can also be used to isolate the inner side of the cylinder 1 to prevent the open flame from spreading to the right side of the cylinder 1 and igniting the servo motor 3 and gearbox 5 and other electrical components, further improving safety performance.

[0025] It also includes fins 207; twelve fins 207 are fixedly connected to the connecting shaft 7.

[0026] The side of the ring 10 closest to the baffle 11 is made of a heat-conducting material, and the side of the ring 10 furthest from the baffle 11 is made of a heat-insulating material; the side of the ring 10 closest to the baffle 11 is fixedly connected to the corresponding fin 207.

[0027] During the test, the heat from the brake disc 8 is conducted to the connecting shaft 7, and then through the connecting shaft 7 to the left side of the fins 207 and the ring 10. When air passes through the gap between the connecting shaft 7 and the baffle 11, it comes into contact with the left side of the fins 207 and the ring 10. At this time, the heat on the fins 207 and the ring 10 is conducted into the air, which helps to improve the heat dissipation effect on the connecting shaft 7. At the same time, the connecting shaft 7 drives the fins 207 to perform a circular motion, causing the side of the fins 207 to collide with the air flowing to the left, which helps to improve the air's ability to dissipate heat. The contact effect of fins 207 improves heat dissipation and further reduces the risk of spontaneous combustion. During use, when air passes through the gap between the connecting shaft 7 and the baffle 11, it will contact fins 207 and the left side of the ring 10, thereby improving the heat dissipation effect on the connecting shaft 7. At the same time, during the test, the connecting shaft 7 will drive fins 207 to perform circumferential motion, causing the side of fins 207 to collide with the air flowing to the left, which helps to improve the contact effect between air and fins 207, thereby improving heat dissipation and further reducing the risk of spontaneous combustion, resulting in strong safety.

[0028] Example 2, based on Example 1, such as Figure 2 and Figure 5 As shown, the baffle 11 is conical.

[0029] It also includes a dustproof net 208; the dustproof net 208 is bolted to the cylinder 1, and the dustproof net 208 intercepts the dust.

[0030] The pin 205 has a chamfer, which makes it easier to insert the pin 205 into the connecting block 1 203 and the connecting block 204.

[0031] During the test, the baffle 11 is set in a conical shape. The air is guided by the inclined surface of the baffle 11, so that the air on the right side of the inner side of the cylinder 1 can flow more smoothly to the left, so as to ensure the heat dissipation effect on the connecting shaft 7 and the brake disc 8.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-frequency fatigue loading test bench for brakes based on servo motor direct drive, characterized in that, It includes a cylinder (1) and several bases (2) fixed to the cylinder (1); it also includes a servo motor (3); the servo motor (3) is fixed to the inside of the cylinder (1); a connecting frame (4) is fixed to the inside of the cylinder (1); a gearbox (5) is fixed to the connecting frame (4), and the output shaft of the gearbox (5) is fixed to the input shaft of the servo motor (3); a bearing (6) is fixed to the connecting frame (4); a connecting shaft (7) is connected to the inside of the bearing (6), and the connecting shaft (7) is fixed to the input shaft of the gearbox (5); a speed sensor is provided on the connecting shaft (7); a ring (10) is fixed to the connecting shaft (7); a baffle (11) is connected to the inside of the cylinder (1); an air supply assembly is installed on the cylinder (1); the air supply assembly is used to supply air to the inside of the cylinder (1).

2. The high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 1, characterized in that, A temperature sensor and a flue gas sensor are installed on the side of the cylinder (1) near the mounting position of the brake disc (8).

3. The high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 2, characterized in that, It also includes an electric push rod (200); several electric push rods (200) are fixedly connected to the inner side of the cylinder (1), and the concave end of the electric push rod (200) is fixedly connected to the baffle (11).

4. The high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 3, characterized in that, The air supply assembly includes a side cover (201), a pipe (202), a connecting block one (203), a connecting block two (204), and a pin (205); the side cover (201) is rotatably connected to the cylinder (1); the pipe (202) passes through the side cover (201); the connecting block one (203) is fixedly connected to the side cover (201); the connecting block two (204) is fixedly connected to the cylinder (1), and the connecting block two (204) is in contact with the connecting block one (203); the connecting block one (203) and the connecting block two (204) are connected by a pin (205).

5. The high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 4, characterized in that, It also includes a handle (206); a handle (206) is fixedly attached to the side cover (201).

6. The high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 4, characterized in that, It also includes fins (207); several fins (207) are fixed on the connecting shaft (7).

7. A high-frequency fatigue loading test bench for brakes based on servo motor direct drive according to claim 6, characterized in that, The side of the ring (10) near the baffle (11) is made of heat-conducting material, and the side of the ring (10) away from the baffle (11) is made of heat-insulating material; the side of the ring (10) near the baffle (11) is fixedly connected to the corresponding fin (207).

8. A high-frequency fatigue loading test bench for a brake based on direct drive of a servo motor according to claim 7, characterized in that, The baffle (11) is conical.

9. A high-frequency fatigue loading test bench for a brake based on direct drive of a servo motor as described in claim 8, characterized in that, It also includes a dustproof net (208); a dustproof net (208) is fixedly attached to the cylinder (1).

10. A high-frequency fatigue loading test bench for brakes based on direct drive of a servo motor according to any one of claims 4-9, characterized in that, The pin (205) has a chamfer.

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