Automobile hand brake multi-force value durability test device

Abstract

The utility model provides an automobile hand brake multi-force value durability test device, which is characterized in that a simulation seat is arranged on a test board to simulate an automobile entity metal plate, an automobile hand brake to be tested is fixedly arranged on the simulation seat, a mechanical arm is used for grasping a handle of the hand brake and lifting the handle, and a button controller is used for simulating a driver to press a control button at the front end of the handle. A hand brake screw at the tail end of the hand brake is connected with a force sensor, a force value digital display is arranged outside the force sensor, the force sensor is connected with an adjusting screw, the adjusting screw penetrates through the fixed seat and a tension spring and is fixed on a rear end piece of the tension spring, the tension spring is located in the fixed seat, and a front end piece of the tension spring abuts against the inner wall of the fixed seat; an automobile hand brake is controlled by a mechanical arm to lift a handle, a hand brake screw moves forwards along with lifting of the handle, a force sensor, an adjusting screw and the tail end of a tension spring move forwards synchronously along with the hand brake screw, and the tension spring is compressed; when the handle is lifted to a designated position, the button controller presses down the control button and enables the handle to fall back, and the tension spring stretches.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts durability testing, in particular to an automobile handbrake multi-force value durability testing device. Background Art

[0002] my country's automotive industry has experienced rapid growth in recent years, and cars have become a primary means of transportation for everyday use. The handbrake is a crucial component of a vehicle's braking system, providing resistance to the vehicle during parking and preventing it from rolling away. Unlike brakes, the handbrake utilizes a brake lever to rotate a ratchet, which in turn drives a cable bracket to pull a cable, which is connected to the rear brake to apply the brakes. The handbrake also utilizes a return spring. When the handbrake is applied, the spring stretches; when the handbrake is released, the spring returns to its original length, releasing the ratchet's one-way rotational motion. Consequently, prolonged use of the handbrake causes both the cable and spring to deform. This deformation is irreversible, reducing braking effectiveness and increasing the travel of the parking brake. Therefore, durability testing of a vehicle's handbrake is a crucial performance test, the quality of which directly impacts the safety of the driver and passengers.

[0003] The current test equipment for the durability of automobile handbrakes simulates the pulling of the handle during daily use and conducts tens of thousands of repeated simulation tests. Ultimately, the qualification is determined by the status of the handbrake. However, the handbrake is usually just pulled up, and there is no precise limit on the force applied to the handbrake. There is no accurate durability test for the handbrake under different load conditions. Summary of the Invention

[0004] In order to solve the problem that the current durability test of automobile handbrake cannot accurately test different loads and simulate different force conditions, the utility model proposes a multi-force value durability test device for automobile handbrake.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A multi-force durability test device for a vehicle handbrake. The vehicle handbrake to be tested includes a handle, a control button, a handbrake spring, and a handbrake screw. The control button is located at the front end of the handle, and the handbrake spring and the handbrake screw are located at the inner rear end of the vehicle handbrake. The compression of the handbrake spring is controlled by adjusting the handbrake screw. The test device includes a test bench, a simulation seat, a mechanical arm, a button controller, a force sensor, a force value digital display, an adjustment screw, a tension spring, and a fixing seat.

[0007] The simulation seat simulates the material and shape of the interior of the car and is fixedly installed on the table of the test bench. The handbrake of the car to be tested is installed on the simulation seat to simulate the actual situation inside the car. The working end of the robotic arm is gripped and fixed on the handle. The button controller is installed on the handle. The button controller moves synchronously with the car handle and is used to press the control button of the car handle.

[0008] The tension spring is located in the fixing seat, the front end of the tension spring is provided with a front end piece, the rear end of the tension spring is provided with a rear end piece, the front end piece is against the inner side wall of the fixing seat, the tail end of the adjusting screw passes through the fixing seat and the tension spring and is directly fixed on the rear end piece, the head end of the adjusting screw is located outside the fixing seat and connected to the force sensor, the head end of the force sensor is connected to the handbrake screw, the force sensor is externally connected to the force value digital display, and the force value digital display is used to display the measured force value in real time;

[0009] The car handbrake is controlled by the mechanical arm to lift the handle, and the handbrake screw moves forward as the handle is lifted. The force sensor, the adjusting screw and the tail end of the tension spring move forward synchronously with the handbrake screw, and the tension spring is compressed; when the handle is lifted to a specified position, the button controller presses the control button and causes the handle to fall back, and the tension spring extends.

[0010] Preferably, the robotic arm is fixedly mounted on the test bench, or fixedly mounted on other fixed walls outside the test bench.

[0011] Preferably, the robotic arm is provided with a pivot joint, and the pivot joint is used to adapt to the angle change of the handle when it swings.

[0012] Preferably, a connecting plate is provided at the tail end of the adjusting screw, and the force sensor is fixedly connected to the connecting plate.

[0013] Preferably, the inner and outer sides of the front end piece and the rear end piece, that is, the side in contact with the tension spring and the side away from the tension spring are both flat side surfaces, and the front end piece is in close contact with the inner side wall of the fixing seat.

[0014] Preferably, the adjusting screw is detachably connected and fixed to the rear end piece.

[0015] Preferably, the adjusting screw is located on the central axis of the tension spring.

[0016] Preferably, the fixing seat is fixedly installed on the ground, or fixedly connected to the side of the test bench.

[0017] Preferably, different types of tension springs are selected according to different load force values.

[0018] Preferably, the button controller includes a mounting base, a cylinder and a presser. The cylinder is fixedly mounted on the side of the handle through the mounting base. The presser is mounted on the piston rod of the cylinder and faces the control button. When the cylinder is extended and retracted once, the presser moves back and forth with the piston rod and presses the control button once.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. It can simulate the installation method of the handle in the real car and simulate the actual use of the car handbrake, with a high degree of automation and accurate test results;

[0021] 2. The tightness of the handbrake can be adjusted by adjusting the handbrake screw and the handbrake spring. At the same time, by replacing the tension spring, different load conditions of the car handbrake can be simulated, which can achieve accurate simulation testing of the handbrake's multi-force load. The force value is detected and displayed by the force sensor and the force digital display, which makes it convenient for testers to accurately adjust the load force value and monitor the force value changes in real time during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of a handle-returning state of a vehicle handbrake multi-force value durability testing device;

[0024] Figure 2 A schematic diagram of a handle-lifting state of a vehicle handbrake multi-force value durability testing device;

[0025] Figure 3 This is a schematic diagram of the structure of a car handbrake and the button controller thereon;

[0026] Among them, there are car handbrake, handle 101, control button 102, handbrake screw 103, connecting plate 104; test bench 1, simulation seat 2, robotic arm 3, button controller 4, force sensor 5, force value digital display 6, adjustment screw 7, tension spring 8, fixing seat 9; front end piece 81, rear end piece 82; mounting seat 41, cylinder 42, presser 43. DETAILED DESCRIPTION

[0027] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] Please refer to Figure 1-Figure 3 The automobile handbrake to be tested in the present invention includes a handle 101, a control button 102, a handbrake spring, and a handbrake screw 103. The control button 102 is located at the front end of the handle 101, and the handbrake spring and the handbrake screw 103 are located at the inner tail end of the automobile handbrake. The compression of the handbrake spring is controlled by adjusting the handbrake screw 103. In actual operation, pulling up the handbrake is the braking state, at which time the handle 101 is lifted and the handbrake screw 103 moves forward; pressing the control button 102 to lower the handbrake is the non-braking state, at which time the handle 101 is lowered and the handbrake screw 103 moves backward. When the handbrake screw 103 is adjusted to different positions or different states, the compression of the handbrake spring also changes, and the tightness of the handbrake changes. However, the current durability test for automobile handbrakes lacks accurate simulation of the handbrake under different loads, resulting in a lack of accuracy in the test results.

[0030] The present invention provides a vehicle handbrake multi-force value durability test device, comprising a test bench 1, a simulation seat 2, a mechanical arm 3, a button controller 4, a force sensor 5, a force value digital display 6, an adjusting screw 7, a tension spring 8, and a fixing seat 9;

[0031] The simulation seat 2 simulates the material and shape of the interior of the car and is fixedly installed on the table of the test bench 1. The handbrake of the car to be tested is installed on the simulation seat 2 to simulate the actual situation inside the car. The working end of the robotic arm 3 is gripped and fixed on the handle 101. The button controller 4 is installed on the handle 101. The button controller 4 moves synchronously with the car handle 101 and is used to press the control button 102 of the car handle 101;

[0032] The tension spring 8 is located in the fixed seat 9, the front end of the tension spring 8 is provided with a front end piece 81, and the rear end of the tension spring 8 is provided with a rear end piece 82. The front end piece 81 is against the inner wall of the fixed seat 9, and the tail end of the adjusting screw 7 passes through the fixed seat 9 and the tension spring 8 and is directly fixed on the rear end piece 82. The head end of the adjusting screw 7 is located on the outside of the fixed seat 9 and is connected to the force sensor 5. The head end of the force sensor 5 is connected to the handbrake screw 103. The force sensor 5 is externally connected to the force value digital display 6, and the force value digital display 6 is used to display the measured force value in real time.

[0033] The actual use of the vehicle handbrake multi-force durability tester of the present invention is as follows: A simulated vehicle handbrake to be tested is mounted on a simulation base 2, and the handbrake screw 103 at the rear end of the handbrake is connected to the force sensor 5. Handbrake screw 103 is adjusted so that the operating force of the fifth tooth of the handbrake is 250 ± 10 N. This is the correct setting, and subsequent load increases on the handbrake will use this as the reference point. The control robot arm 3 grasps the handle 101 and lifts it upward. During the upward swing of the handle 101, the handbrake spring is compressed and the handbrake screw 103 moves forward. At the same time, the power sensor 5, the adjusting screw 7, and the rear end piece 82 of the tension spring 8 move forward, and the front end piece 81 of the tension spring 8 always rests on the inner wall of the fixing seat 9, so the tension spring 8 is compressed; the handle 101 rises to the specified position, completing the action simulation of "pulling up the handbrake", the robot arm 3 no longer applies force to the handle 101, and the button controller 4 presses the control button 102 at the front end of the handle 101, so that the handbrake releases the braking state, the compressed tension spring 8 stretches and recovers, and the adjusting screw 7 and the force sensor 5 move backward, driving the handle 101 screw to move backward, and the handle 101 of the car handbrake falls back until it falls back to the initial position. During this falling process of the handle 101, the robot arm 3 does not apply force to the handle 101 at all times. Pulling the parking brake lever to the specified travel, pressing the travel button, and returning the parking brake lever to the initial position constitutes a complete handbrake simulation operation, which can be repeated multiple times as a cycle. After testing under a load of 250N, the handbrake screw 103 can be adjusted to change the load value and repeatedly test the durability of the vehicle handbrake under multiple force values. The force sensor 5 and the force value digital display 6 can accurately display real-time force value data. When adjusting the load value of the vehicle handbrake, the data of the force value digital display 6 can be observed to make precise adjustments to obtain more accurate test results.

[0034] In some embodiments, the multi-force durability test is as follows: load 250N, test cycle number 100,000; load 300N, test cycle number 30,000; load 400N, test cycle number 10,000; load 500N, test cycle number 10,000; in the above durability test, each complete single operation cycle process lasts 5±0.5s.

[0035] In some embodiments, the robotic arm 3 is fixedly mounted on the test bench 1 or on another fixed wall outside the test bench 1; one end of the robotic arm 3 is fixed, and the other end, i.e., the working end, grasps the handle 101 to simulate the action of lifting the handle 101. The robotic arm 3 is fixed so as not to affect the movement of the handle 101. Preferably, the force applied by the robotic arm 3 and the swing direction of the handle 101 are in the same plane, preferably the same, to avoid interference with the movement of the handle 101.

[0036] In some embodiments, the robot arm 3 is provided with a pivot joint, which is used to adapt to the angle change when the handle 101 swings, so that the robot arm 3 simulates the lifting action of the handle 101 to be more in line with the real force situation, and simulates the force exerted by the human arm in the process of lifting the handle 101. Figure 1 and Figure 2 The working state and angle between the robotic arm 3 and the handle 101 in the figure are only examples of one case. In fact, if different robotic arms 3 are selected, the angles between the robotic arm 3 and the handle 101 will be different during the process of applying force to lift the handle 101.

[0037] In some embodiments, a connecting plate 104 is provided at the tail end of the adjusting screw 7, and the force sensor 5 is fixedly connected to the connecting plate 104. On the one hand, the adjusting screw 7 and the force sensor 5 are connected through the connecting plate 104, making the connection between the two more convenient. On the other hand, the force sensor 5 is directly connected to the connecting plate 104, and the connecting plate 104 can act as an equalizer, so that the force value detected by the force sensor 5 is more stable and accurate.

[0038] In some embodiments, the inner and outer sides of the front end piece 81 and the rear end piece 82, i.e., the side in contact with the tension spring 8 and the side facing away from the tension spring 8, are both flat sides, and the front end piece 81 is in close contact with the inner wall of the fixing seat 9. This structure can ensure that during the lifting and swinging of the handle 101 and the extension and retraction of the tension spring 8, the front end of the tension spring 8 is always in close contact with the inner wall of the fixing seat 9, preventing the tension spring 8 from shaking, shifting, or even breaking free during the extension and retraction process, thereby ensuring the stability of the durability test process. Preferably, the front end piece 81 of the tension spring 8 can also be fixed to the inner wall of the fixing seat 9. More preferably, a detachable fixing method is selected, such as screw fixing, snap fixing, magnetic fixing, etc.

[0039] In some embodiments, the adjusting screw 7 is detachably connected and fixed to the rear end piece 82. As long as the adjusting screw 7 and the rear end piece 82 are disassembled, the tension spring 8 can be removed from the entire adjusting screw 7, thereby realizing the replacement of the tension spring 8.

[0040] In some embodiments, the adjusting screw 7 is located on the central axis of the tension spring 8. When the adjusting screw 7 moves back and forth and drives the tension spring 8 to expand and contract, it can be ensured that the tension spring 8 expands and contracts along its own central axis. Therefore, the tension spring 8 will not be detached or even broken due to the skewness or misalignment of the elastic coil of the tension spring 8 itself.

[0041] In some embodiments, the fixing seat 9 is fixedly installed on the ground or fixedly connected to the side of the test bench 1, and the front end of the tension spring 8 is against the inner wall of the fixing seat 9. Therefore, the position of the fixing seat 9 is fixed, which can further ensure the stability of the extension and contraction of the tension spring 8.

[0042] In some embodiments, different types of tension springs 8 are selected based on different load values. When the load on the parking brake exceeds the maximum elastic force range of the tension spring 8, a larger type of tension spring 8 can be selected based on actual conditions to match the current test conditions. Similarly, when the load on the parking brake falls below the minimum elastic force range of the tension spring 8, a smaller type of tension spring 8 can be selected based on the actual conditions. Selecting the appropriate type of tension spring 8 as described above can ensure smoother simulated operation of the handle 101 and more accurate test results.

[0043] In some embodiments, please refer to Figure 3 The button controller 4 includes a mounting base 41, a cylinder 42, and a presser 43. The cylinder 42 is fixedly mounted on the side of the handle 101 via the mounting base 41. The presser 43 is mounted on the piston rod of the cylinder 42 and faces the control button 102. When the cylinder 42 retracts and contracts once, the presser 43 moves back and forth with the piston rod and presses the control button 102 once. The button controller 4 is directly mounted on the handle 101 and is only responsible for pressing the control button 102 at the front end of the handle 101. The presser 43 can be a rod-shaped object fixed to the piston rod of the cylinder 42. By moving back and forth, it presses / releases the control button 102 to simulate a human hand pressing the control button 102. Preferably, the button controller 4 and the robotic arm 3 do not interfere with each other.

[0044] In the present invention, the robotic arm 3, button controller 4, force sensor 5, and force value digital display 6 can be connected to a central control system, which can be a PC or an industrial computer, etc. The central control system sends unified instructions for control and performs corresponding actions to ensure the automation and accuracy of the durability test.

[0045] The automobile handbrake multi-force value durability testing device of the present invention is easy to install and has a high degree of automation. It can realize the durability simulation test of the handbrake multi-force value load, and can display the force value in real time through the force value digital display, thereby helping to improve the test accuracy.

[0046] The present invention has been described with reference to the above embodiments. However, these embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A vehicle handbrake multi-force durability test device, wherein the vehicle handbrake to be tested comprises a handle, a control button, a handbrake spring, and a handbrake screw. The control button is located at the front end of the handle, and the handbrake spring and the handbrake screw are located at the inner rear end of the vehicle handbrake. The compression of the handbrake spring is controlled by adjusting the handbrake screw. The device is characterized by: The testing device includes a test bench, a simulation seat, a robotic arm, a button controller, a force sensor, a force value digital display, an adjusting screw, a tension spring, and a fixing seat; The simulation seat simulates the material and shape of the interior of the car and is fixedly installed on the table of the test bench. The handbrake of the car to be tested is installed on the simulation seat to simulate the actual situation inside the car. The working end of the robotic arm is gripped and fixed on the handle. The button controller is installed on the handle. The button controller moves synchronously with the handle and is used to press the control button of the handle. The tension spring is located in the fixing seat, the front end of the tension spring is provided with a front end piece, the rear end of the tension spring is provided with a rear end piece, the front end piece is against the inner side wall of the fixing seat, the tail end of the adjusting screw passes through the fixing seat and the tension spring and is directly fixed on the rear end piece, the head end of the adjusting screw is located outside the fixing seat and connected to the force sensor, the head end of the force sensor is connected to the handbrake screw, the force sensor is externally connected to the force value digital display, and the force value digital display is used to display the measured force value in real time; The car handbrake is controlled by the mechanical arm to lift the handle, and the handbrake screw moves forward as the handle is lifted. The force sensor, the adjusting screw and the tail end of the tension spring move forward synchronously with the handbrake screw, and the tension spring is compressed; when the handle is lifted to a specified position, the button controller presses the control button and causes the handle to fall back, and the tension spring extends.

2. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: The robotic arm is fixedly mounted on the test bench, or fixedly mounted on a fixed wall outside the test bench.

3. The automobile handbrake multi-force durability testing device according to claim 2, characterized in that: The mechanical arm is provided with a rotating shaft joint, and the rotating shaft joint is used to adapt to the angle change when the handle is swung.

4. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: A connecting plate is provided at the tail end of the adjusting screw, and the force sensor is fixedly connected to the connecting plate.

5. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: The inner and outer sides of the front end piece and the rear end piece, that is, the side in contact with the tension spring and the side away from the tension spring are both flat side surfaces, and the front end piece is in close contact with the inner side wall of the fixing seat.

6. The automobile handbrake multi-force durability testing device according to claim 5, characterized in that: The adjusting screw is detachably connected and fixed to the rear end piece.

7. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: The adjusting screw is located on the central axis of the tension spring.

8. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: The fixing seat is fixedly installed on the ground, or fixedly connected to the side of the test bench.

9. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: Choose different types of tension springs according to different load values.

10. The automobile handbrake multi-force durability testing device according to claim 1, characterized in that: The button controller includes a mounting base, a cylinder and a presser. The cylinder is fixedly mounted on the side of the handle through the mounting base. The presser is mounted on the piston rod of the cylinder and faces the control button. When the cylinder is extended and retracted once, the presser moves back and forth with the piston rod and presses the control button once.

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