Electric vehicle disc brake clamping force testing equipment

Abstract

This utility model relates to an electric vehicle disc brake clamping force testing device. The device includes a protective housing, a bracket fixedly connected to the bottom wall of the inner cavity of the protective housing, a rotating shaft rotatably connected to the top of the bracket, a brake disc fixedly connected to the middle section of the rotating shaft, a drive device for rotating the brake disc on one side of the protective housing, and a speed sensor for detecting the rotational speed of the brake disc mounted on the bracket. In use, the brake caliper is placed on top of the brake disc, and a fixed clamping plate and a movable clamping plate are used to fix the brake caliper. Then, a servo motor is started to drive the brake disc mounted on the rotating shaft to rotate. The speed sensor detects the rotational speed of the brake disc when the brake caliper is in the open and closed states, and the difference in speed is used to determine the clamping force of the disc brake. The clamping force is tested by simulating the normal working conditions of the disc brake device, which greatly improves the accuracy of the test data.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment, specifically relating to a device for testing the clamping force of electric vehicle disc brakes. Background Technology

[0002] Disc brakes use a metal disc instead of a drum. There is a flat brake shoe on both sides of the brake disc. When the master cylinder delivers oil to the slave cylinder, the brake shoe clamps the brake disc to achieve a braking effect. It is now widely used on the front wheels. Its advantages are that it is sensitive, has good heat dissipation, does not require adjustment of brake clearance, and is easy to maintain.

[0003] Because disc brakes have a delicate structure, problems with materials and processing during manufacturing can lead to serious traffic accidents. Therefore, it is necessary to test their reliability and prevent quality issues. Current methods generally involve mounting a pressure sensor on the brake caliper. When the brake caliper pushes the metal disc to clamp, the pressure sensor detects the clamping force of the disc brake. However, during braking, the metal disc rotates relative to the brake disc, and relying solely on the pressure sensor for detection may result in inaccurate data. Utility Model Content

[0004] The purpose of this utility model is to provide a simple and reasonably designed electric vehicle disc brake clamping force testing device to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] An electric vehicle disc brake clamping force testing device includes a protective housing. A bracket is fixedly connected to the bottom wall of the inner cavity of the protective housing. A rotating shaft is rotatably connected to the top of the bracket. A brake disc is fixedly connected to the middle section of the rotating shaft. A drive device for driving the brake disc to rotate is installed on one side of the protective housing. A speed sensor for detecting the rotation speed of the brake disc is installed on the bracket. A display is installed on the side of the protective housing away from the drive device. The speed sensor is electrically connected to the display via a wire. A support structure is installed on the protective housing. A fixed clamping plate is fixedly connected to the support structure. A cylinder is fixedly inserted through the top of the fixed clamping plate. A piston rod is installed on the output end of the cylinder. A movable clamping plate is fixedly connected to the end of the piston rod away from the cylinder. A brake caliper is sleeved on the top of the brake disc. An oil injection pipe is connected to the brake caliper. The brake caliper is clamped and fixed by the cooperation of the fixed clamping plate and the movable clamping plate.

[0007] As a further optimization of this utility model, clamping plates are welded on the rotating shafts on both sides of the brake disc. The adjacent sides of the two clamping plates are in contact with the brake disc. Multiple bolts threadedly connected to the clamping plates are provided around the two clamping plates. The middle section of the bolts passes through the brake disc and is slidably connected to the brake disc.

[0008] As a further optimization of this utility model, the driving device includes a servo motor fixedly installed on the outer wall of the protective box. The output end of the servo motor passes through the side wall of the protective box and is rotatably connected to the protective box. A coupling is fixedly connected to one end of the rotating shaft near the servo motor, and the rotating shaft is fixed to the output end of the servo motor through the coupling.

[0009] As a further optimization of this utility model, the support structure includes two support plates fixedly connected to both ends of the protective box, a crossbeam fixedly connected between the top ends of the two support plates, and a fixing clamp fixedly connected to the bottom wall of the crossbeam.

[0010] As a further optimization of this utility model, the top of the movable clamping plate extends outward to form a slider, and a guide groove is provided on the lower surface of the crossbeam to be aligned with the slider. The top of the slider is located in the guide groove and is slidably connected to the crossbeam through the guide groove.

[0011] As a further optimization of this utility model, both the fixed clamping plate and the movable clamping plate are fixedly connected with positioning plates for positioning the brake caliper.

[0012] The beneficial effects of this utility model are as follows: In use, after the brake caliper is placed on top of the brake disc, the brake caliper is fixed by a fixed clamping plate and a movable clamping plate. Then, the servo motor is started to drive the brake disc mounted on the rotating shaft to rotate. The rotation speed of the brake disc is detected by a speed sensor when the brake caliper is in the open and closed state, and the clamping force of the disc brake is determined by the speed difference. During the detection process, the clamping force is detected by simulating the normal working condition of the disc brake device, which can greatly improve the accuracy of the detection data. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one side of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the other side of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the installation structure of the bracket, brake disc and brake caliper of this utility model;

[0016] Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0017] In the diagram: 1. Protective housing; 2. Brake; 3. Shaft; 4. Brake disc; 5. Coupling; 6. Servo motor; 7. Speed ​​sensor; 8. Display; 9. Support plate; 10. Crossbeam; 11. Fixed clamping plate; 12. Cylinder; 13. Piston rod; 14. Movable clamping plate; 15. Positioning plate; 16. Brake caliper; 17. Oil injection pipe. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example

[0020] like Figure 1 - Figure 4 As shown, an electric vehicle disc brake clamping force testing device includes a protective housing 1. The protective housing 1 is set to improve the safety of the overall testing device during use. A bracket 2 is fixedly connected to the bottom wall of the inner cavity of the protective housing 1. A rotating shaft 3 is rotatably connected to the top of the bracket 2. A brake disc 4 is fixedly connected to the middle section of the rotating shaft 3. Clamping plates are welded on the rotating shaft 3 on both sides of the brake disc 4. The adjacent sides of the two clamping plates are in contact with the brake disc 4. Multiple bolts threadedly connected to the clamping plates are passed through the periphery of the two clamping plates. The middle section of the bolts passes through the brake disc 4 and is slidably connected to the brake disc 4. The two clamping plates and bolts are used to further fix the brake disc 4, so as to improve the stability of the installation of the brake disc 4 and the rotating shaft 3 and minimize the problem of relative rotation between the brake disc 4 and the rotating shaft 3 during the testing process, which would affect the test results.

[0021] A drive device for rotating the brake disc 4 is installed on one side of the protective housing 1. The drive device includes a servo motor 6 fixedly installed on the outer wall of the protective housing 1. The output end of the servo motor 6 passes through the side wall of the protective housing 1 and is rotatably connected to the protective housing 1. A coupling 5 is fixedly connected to one end of the rotating shaft 3 near the servo motor 6. The rotating shaft 3 is fixed to the output end of the servo motor 6 through the coupling 5. When the servo motor 6 is started, the rotating shaft 3 is driven to rotate through the connecting shaft 5, thereby driving the brake disc 4 installed on the middle section of the rotating shaft 3 to rotate. At the same time, the user can adjust the speed of the servo motor 6 and perform testing under different speed conditions.

[0022] A speed sensor 7 for detecting the rotational speed of the brake disc 4 is installed on the bracket 2. A display 8 is installed on the side of the protective housing 1 away from the drive unit. The speed sensor 7 is electrically connected to the display 8 through a wire. The detection end of the speed sensor 7 faces the side wall of the brake disc 4 and is used to detect the rotational speed of the brake disc 4 in real time and transmit the detection information to the display 8 for intuitive display to the operator.

[0023] A support structure is installed on the protective enclosure 1, and a fixing clamp 11 is fixedly connected to the support structure. The support structure includes two support plates 9 fixedly connected to both ends of the protective enclosure 1, and a crossbeam 10 is fixedly connected between the top ends of the two support plates 9. The fixing clamp 11 is fixedly connected to the bottom wall of the crossbeam 10.

[0024] A cylinder 12 is fixedly inserted through the top of the fixed clamping plate 11. A piston rod 13 is installed on the output end of the cylinder 12. A movable clamping plate 14 is fixedly connected to the end of the piston rod 13 away from the cylinder 12. A brake caliper 16 is fitted on the top of the brake disc 4. An oil injection pipe 17 is connected to the brake caliper 16. The brake caliper 16 is clamped and fixed by the cooperation of the fixed clamping plate 11 and the movable clamping plate 14, which makes it convenient for the user to fix the brake caliper 16 after fitting it on the brake disc 4.

[0025] The top of the movable clamping plate 14 extends outward to form a slider. The lower surface of the crossbeam 10 is provided with a guide groove that is aligned with the slider. The top of the slider is located in the guide groove and is slidably connected to the crossbeam 10 through the guide groove. By using the slider at the top of the movable clamping plate 15 to cooperate with the guide groove on the lower surface of the crossbeam 10, the sliding path of the movable clamping plate 14 is guided, so as to avoid the movable clamping plate 14 from shifting during the sliding process and affecting the stability of clamping the brake caliper 16.

[0026] The fixed clamping plate 11 and the movable clamping plate 14 are both fixedly connected to a positioning plate 15 for positioning the brake caliper 16. By installing the positioning plate 15, the user only needs to place the top of the brake caliper 16 against the lower surface of the positioning plate 15 when clamping the brake caliper 16 to achieve quick positioning of the brake caliper 16, thereby improving the fixing efficiency of the brake caliper 16.

[0027] It should be noted that, in use, this electric vehicle disc brake clamping force testing device first places the brake caliper 16 on top of the brake disc 4, and slides the brake caliper 16 so that its end and top wall are respectively in contact with the fixed clamping plate 11 and the positioning plate 15, achieving rapid positioning of the brake caliper 16. Then, the cylinder 12 is activated, which drives the piston rod 13 to retract, thereby causing the movable clamping plate 14 to slide towards the fixed clamping plate 11, cooperating with the fixed clamping plate 11 to fix the brake caliper 16 above the brake disc 4. At this point, the device can be started. The servo motor 6 drives the brake disc 4 mounted on the rotating shaft 3 to rotate via the coupling 5. The rotational speed of the brake disc 4 is detected by the speed sensor 7 when the brake caliper 16 is not clamping the brake disc 4. Then, the user injects hydraulic oil into the brake caliper 16 through the oil injection pipe 17. The hydraulic oil pushes the metal disc to move and clamp the brake disc 4. The speed sensor 7 detects the rotational speed of the brake disc 4 at this time. The clamping force of the brake caliper 16 is judged by the speed difference. By simulating the working condition of the disc brake, the clamping force is detected, which greatly improves the accuracy of the detection data.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An electric vehicle disc brake clamping force detection device, comprising a protective box body (1), a support (2) is fixedly connected to the bottom wall of the inner cavity of the protective box body (1), characterized in that: The top of the bracket (2) is rotatably connected to a rotating shaft (3), and a brake disc (4) is fixedly connected to the middle section of the rotating shaft (3). A drive device for driving the brake disc (4) to rotate is installed on one side of the protective housing (1). A speed sensor (7) for detecting the rotation speed of the brake disc (4) is installed on the bracket (2). A display (8) is installed on the side of the protective housing (1) away from the drive device. The speed sensor (7) is electrically connected to the display (8) through a wire. A support structure is installed on the protective housing (1). A fixed clamping plate (11) is fixedly connected to the support structure. A cylinder (12) is fixedly inserted through the top of the fixed clamping plate (11). A piston rod (13) is installed on the output end of the cylinder (12). A movable clamping plate (14) is fixedly connected to the end of the piston rod (13) away from the cylinder (12). A brake caliper (16) is sleeved on the top of the brake disc (4). An oil injection pipe (17) is connected to the brake caliper (16). The brake caliper (16) is clamped and fixed by the cooperation of the fixed clamping plate (11) and the movable clamping plate (14).

2. The disc brake clamping force detection device for an electric vehicle according to claim 1, characterized by: Clamping plates are welded on the rotating shafts (3) on both sides of the brake disc (4). The adjacent sides of the two clamping plates are in contact with the brake disc (4). Multiple bolts threadedly connected to the clamping plates are provided around the two clamping plates. The middle section of the bolts passes through the brake disc (4) and is slidably connected to the brake disc (4).

3. The disc brake clamping force detection device for an electric vehicle according to claim 1, characterized by: The drive device includes a servo motor (6) fixedly installed on the outer wall of the protective housing (1). The output end of the servo motor (6) passes through the side wall of the protective housing (1) and is rotatably connected to the protective housing (1). A coupling (5) is fixedly connected to one end of the rotating shaft (3) near the servo motor (6). The rotating shaft (3) is fixed to the output end of the servo motor (6) through the coupling (5).

4. The disc brake clamping force detection device for an electric vehicle according to claim 1, characterized by: The support structure includes two support plates (9) fixedly connected to both ends of the protective box (1), a crossbeam (10) fixedly connected between the top ends of the two support plates (9), and a fixed clamping plate (11) fixedly connected to the bottom wall of the crossbeam (10).

5. The disc brake clamping force detection device for an electric vehicle according to claim 4, characterized by: The top of the movable clamp (14) extends outward to form a slider. The lower surface of the crossbeam (10) is provided with a guide groove that is aligned with the slider. The top of the slider is located in the guide groove and is slidably connected to the crossbeam (10) through the guide groove.

6. The disc brake clamping force detection device for an electric vehicle according to claim 1, characterized by: The fixed clamping plate (11) and the movable clamping plate (14) are both fixedly connected to a positioning plate (15) for positioning the brake caliper (16).

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