Automobile brake pedal durability testing device

Abstract

The utility model provides a durability testing device for an automobile brake pedal. The durability testing device comprises a fixing frame, a pedal fixing seat, a brake cylinder, a limiting cylinder and a control module, a to-be-tested automobile brake pedal assembly is installed on the fixing frame through the pedal fixing seat, the brake air cylinder applies force to the pedal from the upper portion under the control of the control module to simulate the treading braking behavior, the limiting air cylinder locks the pedal from the side edge under the control of the control module, and therefore the brake air cylinder can still keep the downward pressing state of the pedal after the applied force is removed; after the limiting air cylinder retracts, the pedal rebounds naturally; the process is repeated for tens of thousands of times, the durability test of the automobile brake pedal is realized, the structure is simple, the test is convenient and accurate, the cost is low, and the device is suitable for durability tests of different models of automobile brake pedal assemblies.

Description

Technical Field

[0001] The utility model relates to automobile component testing, in particular to an automobile brake pedal durability testing device. Background Art

[0002] my country's automotive industry has developed rapidly in recent years, and automobile safety has received increasing attention. The clutch and brake pedals are important safety features of automobiles, and their reliability directly affects driving safety. Therefore, high durability performance is required for automobile brake pedals, and there is a high demand for clutch and brake pedal testing. Existing brake pedals have a complex structure and cannot accurately simulate the pedaling and stopping movements in actual use. Therefore, a simple, easy-to-test automobile brake pedal durability testing device is needed that can accurately simulate actual use. Utility Model Content

[0003] The utility model mainly protects a vehicle brake pedal durability testing device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A vehicle brake pedal durability test device comprises a fixing frame, a pedal fixing seat, a brake cylinder, a limit cylinder and a control module; the pedal fixing seat is arranged inside the fixing frame and is used to fix and install the vehicle brake pedal assembly to be tested; the brake cylinder is mounted on the top of the fixing frame and is located above the pedal of the vehicle brake pedal assembly; a brake push plate is provided at the bottom of the telescopic rod of the brake cylinder, and the brake cylinder drives the brake push plate to press down the pedal of the vehicle brake pedal assembly; the limit cylinder is mounted on the side of the fixing frame and is located beside the vehicle brake pedal assembly; the control module is connected to the brake cylinder and the limit cylinder and controls the telescopic movement of the two cylinders;

[0006] The automobile brake pedal assembly to be tested includes a pedal, a connecting rod, a brake seat, and a limit rod. The connecting rod is connected to the bottom of the pedal, the bottom end of the connecting rod is installed in the brake seat, and the limit rod is fixedly installed on the connecting rod. When the piston rod of the limit cylinder is extended, it abuts against the top of the limit rod and limits the rebound of the connecting rod and the pedal.

[0007] Preferably, the automobile brake pedal assembly to be tested is fixedly mounted on the pedal fixing seat according to the actual vehicle state.

[0008] Preferably, the pedal fixing seat is detachably mounted on the fixing frame.

[0009] Preferably, the force-applying direction extension line of the piston rod of the brake cylinder and the brake push plate when pressed downward passes through the geometric center of the pedal.

[0010] Preferably, the projected area of ​​the brake push plate on the horizontal plane is larger than the projected area of ​​the pedal on the horizontal plane, and when the brake push plate pushes the pedal, the brake push plate completely covers the pedal.

[0011] Preferably, a limiting seat with a limiting hole is provided between the limiting cylinder and the automobile brake pedal assembly to be tested, and the piston rod of the limiting cylinder passes through the limiting hole of the limiting seat and is extended and retracted.

[0012] Preferably, the size of the limiting hole is the same as the longitudinal cross-sectional size of the piston rod of the limiting cylinder.

[0013] Preferably, the limit cylinder is used to extend the piston rod to above the limit rod and lock the pedal when the pedal reaches the full stroke.

[0014] Preferably, a force sensor and / or a displacement sensor is provided at the bottom of the brake push plate to monitor the force and / or displacement changes of the automobile brake pedal assembly during the durability test.

[0015] Preferably, a force sensor is provided at the end of the piston rod of the limit cylinder to monitor the change in force value.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the durability test of the automobile brake pedal is realized through the simple structure of the dual-cylinder connection control device, the automobile brake pedal assembly to be tested is fixed on the fixing frame according to the actual vehicle state, which can more realistically simulate the usage situation; a limit rod is set on the connecting rod of the automobile brake pedal assembly to be tested, which can cooperate with the limit cylinder to lock the pedal to prevent it from rebounding, effectively simulating the situation where the pedal is continuously stepped on when the actual vehicle is used; the present invention has a simple structure, low cost, easy use and accurate test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 This is a state diagram of the automobile brake pedal durability test device with the brake cylinder and limit cylinder fully extended;

[0019] Figure 2 This is a state diagram of the automobile brake pedal durability test device with the brake cylinder retracted and the limit cylinder extended;

[0020] Figure 3 State diagram of the automobile brake pedal durability test device with the brake cylinder and limit cylinder fully retracted

[0021] Figure 4 This is a side view of the durability test of the automobile brake pedal with the brake cylinder and limit cylinder fully extended.

[0022] Among them, there are a fixing frame 1, a pedal fixing seat 2, a brake cylinder 3, a limit cylinder 4, a control module 5, a brake push plate 31, a limit seat 41; an automobile brake pedal assembly 6, a pedal 61, a connecting rod 62, a brake seat 63, and a limit rod 64. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] Please refer to Figure 1-Figure 4 A vehicle brake pedal durability test device includes a fixing frame 1, a pedal fixing seat 2, a brake cylinder 3, a limit cylinder 4 and a control module 5; the pedal fixing seat 2 is arranged inside the fixing frame 1 and is used to fix the vehicle brake pedal assembly 6 to be tested, the brake cylinder 3 is installed on the top of the fixing frame 1 and is located above the pedal 61 of the vehicle brake pedal assembly 6, the bottom of the telescopic rod of the brake cylinder 3 is provided with a brake push plate 31, the brake cylinder 3 drives the brake push plate 31 to press down the pedal 61 of the vehicle brake pedal assembly 6, the limit cylinder 4 is installed The side of the fixed frame 1 is located next to the automobile brake pedal assembly 6, and the control module 5 is connected to the brake cylinder 3 and the limit cylinder 4 and controls the telescopic movement of the two cylinders; the automobile brake pedal assembly 6 to be tested includes a pedal 61, a connecting rod 62, a brake seat 63, and a limit rod 64. The bottom of the pedal 61 is connected to the connecting rod 62, the bottom end of the connecting rod 62 is installed in the brake seat 63, and the limit rod 64 is fixedly installed on the connecting rod 62. When the piston rod of the limit cylinder 4 is extended, it abuts against the top of the limit rod 64 and limits the rebound of the connecting rod 62 and the pedal 61.

[0026] The use process of the automobile brake pedal durability test device of the present invention is as follows: the automobile brake pedal assembly 6 to be tested is mounted on the fixing frame 1 according to the actual vehicle state. The piston rod of the brake cylinder 3 extends, driving the brake push plate 31 to press the brake push plate 31 downward. The brake push plate 31 applies force through the geometric center of the pedal 61 and depresses the pedal 61. When the pedal 61 is pressed to its full stroke, the piston rod of the limit cylinder 4 extends and engages above the limit rod 64, thereby locking the entire automobile brake pedal assembly 6. After the pedal 61 is locked, the piston rod of the upper brake cylinder 3 retracts, removing the force on the pedal 61. After a few seconds, the piston rod of the limit cylinder 4 also retracts away from the limit rod 64, removing the force on the pedal 61, and the power-assisted rebound mechanism of the automobile brake pedal assembly 6 automatically rebounds the pedal 61. The above process is a complete simulated stepping process of the automobile brake pedal assembly 6. The above steps need to be repeated tens of thousands of times to complete the entire durability test.

[0027] When the durability test of the automobile brake pedal assembly 6 is completed, if the ball cage has no deformation or breakage and the pedal 61 assembly can still be used normally, it is a qualified product.

[0028] In one embodiment, the automobile brake pedal assembly 6 to be tested is fixedly mounted on the pedal fixing seat 2 according to the actual vehicle state, which can more realistically restore the four-level usage conditions of the automobile brake pedal assembly 6 to obtain the most accurate test results.

[0029] In one embodiment, the pedal mount 2 is detachably mounted on the mounting bracket 1. The pedal mount 2 may be composed of multiple combinable components, such as fixing components of different shapes. These fixing components can be combined and used according to the actual shape and fixing position of the vehicle brake pedal assembly 6 to be tested. The components are fixed to the mounting bracket 1 via screws, thereby accommodating durability testing of brake pedal assemblies 6 of different models of vehicles.

[0030] In one embodiment, the force direction extension line of the piston rod of the brake cylinder 3 and the brake push plate 31 when pressed down passes through the geometric center of the pedal 61, which can better and more easily press down the pedal 61 and is closer to the situation of the driver stepping on the pedal 61.

[0031] In one embodiment, the projected area of ​​the brake push plate 31 on the horizontal plane is larger than the projected area of ​​the pedal 61 on the horizontal plane. When the brake push plate 31 pushes the pedal 61, the brake push plate 31 completely covers the pedal 61, which can ensure that the piston rod of the brake cylinder 3 can completely push the pedal 61 each time it is extended, avoiding the situation where the push plate and the pedal 61 are intertwined, causing the pedal 61 to be skewed due to force, thereby ensuring test accuracy.

[0032] In one embodiment, a stopper seat 41 with a stopper hole is positioned between the stopper cylinder 4 and the vehicle brake pedal assembly 6 to be tested. The piston rod of the stopper cylinder 4 extends and retracts through the stopper hole in the stopper seat 41. Furthermore, the stopper hole is dimensioned to match the longitudinal cross-sectional dimensions of the piston rod of the stopper cylinder 4. The piston rod of the stopper cylinder 4 is horizontally limited so that each time it is extended or retracted, it is positioned precisely above the stopper rod 64 of the pedal 61 at full travel. This prevents the piston rod of the stopper cylinder 4 from tilting after extended use and failing to achieve its desired stopper function.

[0033] In one embodiment, the limit cylinder 4 is configured to extend the piston rod above the limit rod 64 when the pedal 61 reaches full travel, thereby locking the pedal 61. After reaching full travel, the pedal 61 is locked and remains locked for several seconds, effectively simulating the actual driving experience of stepping on the pedal 61.

[0034] In one embodiment, a force sensor and / or displacement sensor is provided at the bottom of the brake push plate 31 to monitor the force and / or displacement changes of the automobile brake pedal assembly during the durability test. The force sensor and / or displacement sensor is connected to the control module 5 and transmits the sensed force and / or displacement change signal to the control module 5, so that the control module 5 can control the start, stop and extension and retraction of the brake push plate 31 at the appropriate time point to achieve more accurate simulated force application.

[0035] In one embodiment, a force sensor is provided at the end of the piston rod of the limit cylinder 4 to monitor the change in force value. The force sensor is also connected to the control module 5 and transmits the sensed force change signal to the control module 5, so that the control module 5 can control the start, stop and extension of the limit cylinder 4 at the appropriate time point, thereby achieving more precise simulation testing and obtaining more accurate test results.

[0036] In one embodiment, the brake cylinder 3 is detachably mounted on the fixing frame 1 via a cylinder seat. When the automobile brake pedal assembly 6 to be tested is different, the installation position of the brake cylinder 3 can be changed according to actual conditions, and when the brake cylinder 3 needs to be repaired or replaced, it can be quickly disassembled.

[0037] Preferably, the limit cylinder 4 is detachably mounted on the fixing frame 1 through a cylinder seat. When the automobile brake pedal assembly 6 to be tested is different, the installation position of the limit cylinder 4 can be changed according to actual conditions, and when the limit cylinder 4 needs to be repaired or replaced, it can be quickly disassembled.

[0038] In summary, the automobile brake pedal durability testing device of the present invention has a simple structure, convenient and accurate testing, low cost and is suitable for durability testing of automobile brake pedal assemblies of different models.

[0039] 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 brake pedal durability testing device, characterized by: It comprises a fixing frame, a pedal fixing seat, a brake cylinder, a limit cylinder and a control module; the pedal fixing seat is arranged inside the fixing frame and is used to fix the automobile brake pedal assembly to be tested, the brake cylinder is installed on the top of the fixing frame and is located above the pedal of the automobile brake pedal assembly, the bottom of the telescopic rod of the brake cylinder is provided with a brake push plate, the brake cylinder drives the brake push plate to press down the pedal of the automobile brake pedal assembly, the limit cylinder is installed on the side of the fixing frame and is located next to the automobile brake pedal assembly, and the control module is connected to the brake cylinder and the limit cylinder and controls the telescopic movement of the two cylinders; The automobile brake pedal assembly to be tested includes a pedal, a connecting rod, a brake seat, and a limit rod. The connecting rod is connected to the bottom of the pedal, the bottom end of the connecting rod is installed in the brake seat, and the limit rod is fixedly installed on the connecting rod. When the piston rod of the limit cylinder is extended, it abuts against the top of the limit rod and limits the rebound of the connecting rod and the pedal.

2. The automobile brake pedal durability testing device according to claim 1, characterized in that: The automobile brake pedal assembly to be tested is fixedly mounted on the pedal fixing seat according to the actual vehicle state.

3. The automobile brake pedal durability testing device according to claim 1, characterized in that: The pedal fixing seat is detachably mounted on the fixing frame.

4. The automobile brake pedal durability testing device according to claim 1, characterized in that: The force direction extension line of the piston rod of the brake cylinder and the brake push plate when pressed downward passes through the geometric center of the pedal.

5. The automobile brake pedal durability testing device according to claim 1, characterized in that: The projected area of ​​the brake push plate on the horizontal plane is larger than the projected area of ​​the pedal on the horizontal plane. When the brake push plate pushes the pedal, the brake push plate completely covers the pedal.

6. The automobile brake pedal durability testing device according to claim 1, characterized in that: A limiting seat with a limiting hole is arranged between the limiting cylinder and the automobile brake pedal assembly to be tested, and the piston rod of the limiting cylinder passes through the limiting hole of the limiting seat and is extended and retracted.

7. The automobile brake pedal durability testing device according to claim 6, characterized in that: The size of the limiting hole is the same as the longitudinal section size of the piston rod of the limiting cylinder.

8. The automobile brake pedal durability testing device according to claim 1, characterized in that: The limiting cylinder is used to extend the piston rod to above the limiting rod and lock the pedal when the pedal reaches the full stroke.

9. The automobile brake pedal durability testing device according to claim 1, characterized in that: A force sensor and / or a displacement sensor is provided at the bottom of the brake push plate to monitor the force and / or displacement changes of the automobile brake pedal assembly during the durability test.

10. The automobile brake pedal durability testing device according to claim 1, characterized in that: A force sensor is provided at the end of the piston rod of the limit cylinder to monitor the change of force value.

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