Accelerator pedal service life detection device and test method thereof

Abstract

The invention discloses an accelerator pedal service life detection device which comprises a fixed base and a balance rod, the balance rod is arranged on the fixed base, and the fixed base is connected with a fixing clamp so that an accelerator pedal can be arranged on the fixing clamp. A movable cross beam is arranged on the balance rod in a sliding mode, an actuator is arranged on the movable cross beam, and the actuator drives a piston rod to press the accelerator pedal through a hydraulic assembly so that the accelerator pedal can do opening and closing movement; a displacement sensor is arranged on the actuator to detect the displacement amount of the accelerator pedal, and a pressure sensor is arranged on the piston rod to conveniently measure the load force applied to the accelerator pedal. According to the accelerator pedal service life detection device, the hydraulic assembly drives the actuator to replace a human foot to simulate the opening stroke of the accelerator pedal, the number of service life tests, the force applied to the accelerator pedal and the test frequency are set through the upper computer, and therefore the mechanical service life test of the accelerator pedal is completed, operation is easy, use is convenient, and safety and reliability are achieved.

Description

Technical Field

[0001] The invention belongs to the field of automobile accelerator pedal testing, and in particular relates to an accelerator pedal life detection device and a testing method thereof. Background Art

[0002] As the core component of the vehicle power control system, the performance of the car's accelerator pedal is not only related to the car's power, but also to the car's driving safety. Accelerator pedal failure will result in customer complaints.

[0003] Currently, our company conducts inspections based on visual inspection of appearance, dimensions, material, and corrosion resistance. However, the mechanical life and durability of the accelerator pedal cannot be tested, and the signal output during accelerator pedal operation cannot be monitored in real time. Furthermore, quality issues arising from the key performance of the accelerator pedal cannot be evaluated. Existing testing methods are unable to detect the mechanical life and durability of the accelerator pedal.

[0004] Therefore, it is urgent to design a throttle pedal life detection device to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an accelerator pedal life detection device and a testing method thereof, so as to solve the technical problem that the detection means mentioned in the background technology cannot detect the mechanical life and durability of the accelerator pedal.

[0006] To achieve the above objectives, the specific technical solutions of the accelerator pedal life detection device of the present invention are as follows: A device for detecting the life of an accelerator pedal comprises a fixed base and a balance bar, wherein the balance bar is arranged on the fixed base, and a fixing fixture is connected to the fixed base so that the accelerator pedal is set on the fixing fixture; a movable crossbeam is slidably arranged on the balance bar, and an actuator is provided on the movable crossbeam, and the actuator drives a piston rod to press the accelerator pedal through a hydraulic component to make the accelerator pedal open and close; a displacement sensor is provided on the actuator to detect the displacement of the accelerator pedal, and a pressure sensor is provided on the piston rod to facilitate the measurement of the load force applied to the accelerator pedal.

[0007] Furthermore, the hydraulic assembly includes a hydraulic source and a booster pump. The booster pump delivers hydraulic oil to the actuator through an oil supply pipe, and the actuator returns the hydraulic oil to the hydraulic source through an oil return pipe, so that the actuator drives the piston rod to perform reciprocating motion.

[0008] Furthermore, a servo valve is provided on the actuator, and an oil supply pipe and an oil return pipe are connected to the servo valve, and the supply amount of the hydraulic oil is controlled by the servo valve.

[0009] Furthermore, one end of the fixing fixture is connected to the fixing base through a fixing rod, and the side of the fixing fixture away from the fixing rod is connected to the fixing base through an adjusting rod, and the inclination angle of the fixing fixture is changed by the adjusting rod.

[0010] Furthermore, a rubber wheel is provided at one end of the piston rod away from the actuator, and the rubber wheel abuts against the accelerator pedal so that the accelerator pedal changes its stroke opening as the piston rod extends and contracts.

[0011] Furthermore, a plurality of balancing rods are arranged in a rectangular shape on the fixed base, so that the accelerator pedal is arranged between the plurality of balancing rods.

[0012] Furthermore, a plurality of balancing rods are sleeved with a movable crossbeam at one end away from the fixed base, and the movable crossbeam slides along the balancing rods so that the rubber wheel abuts against the accelerator pedal.

[0013] A test method for detecting the life of an accelerator pedal includes a host computer connected to a servo valve to control the oil outlet pressure of a boost pump to change the extension of a piston rod to stretch or compress the accelerator pedal; The host computer is connected to the pressure sensor and the displacement sensor to collect the load force of the pressure sensor and the displacement of the displacement sensor.

[0014] Furthermore, the host computer compares the load force measured by the pressure sensor and the displacement measured by the displacement sensor with the command signal, and outputs a control signal to the servo valve according to the comparison result to control the pressure value of the hydraulic oil.

[0015] Furthermore, an accelerator pedal sensor is provided on the accelerator pedal, and the host computer collects the signal voltage of the accelerator pedal sensor to determine the durability of the accelerator pedal.

[0016] The accelerator pedal life detection device and testing method of the present invention have the following advantages: The hydraulic assembly drives the actuator to simulate the accelerator pedal's opening travel, replacing the human foot. The host computer sets the number of life tests, the force applied to the accelerator pedal, and the test frequency, completing the mechanical life test of the accelerator pedal. When the accelerator pedal fails, analysis and improvements can be performed to improve the quality control of incoming parts inspection. This application is simple to operate, easy to use, safe and reliable, and easy to install and disassemble, significantly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the accelerator pedal life detection device of the present invention; Figure 2 It is a flow chart of the accelerator pedal life detection device of the present invention.

[0018] Description of the marks in the figure: 1. Fixed base; 2. Balance bar; 3. Fixing fixture; 4. Accelerator pedal; 5. Moving beam; 6. Actuator; 7. Piston rod; 8. Displacement sensor; 9. Pressure sensor; 10. Hydraulic source; 11. Booster pump; 12. Oil supply pipe; 13. Oil return pipe; 14. Servo valve; 15. Adjustment rod; 16. Rubber wheel; 17. Host computer; 18. Accelerator pedal sensor. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To the attached Figure 2 The accelerator pedal life detection device of the present invention is described.

[0022] like Figure 1 As shown, the accelerator pedal life detection device in the present invention includes a fixed base 1 and a balance bar 2, the balance bar 2 is arranged on the fixed base 1, and the fixed base 1 is connected to a fixing clamp 3 so that the accelerator pedal 4 is set on the fixing clamp 3; a moving beam 5 is slidably arranged on the balance bar 2, and an actuator 6 is provided on the moving beam 5. The actuator 6 drives the piston rod 7 through the hydraulic component to press the accelerator pedal 4 so that the accelerator pedal 4 opens and closes; a displacement sensor 8 is provided on the actuator 6 to detect the displacement of the accelerator pedal 4, and a pressure sensor 9 is provided on the piston rod 7 to facilitate the measurement of the load force applied to the accelerator pedal 4.

[0023] The hydraulic assembly drives the actuator 6 to simulate the opening stroke of the accelerator pedal 4, replacing the human foot. The host computer 17 sets the number of life tests, the force applied to the accelerator pedal 4, and the test frequency, thereby completing the mechanical life test of the accelerator pedal 4. When the accelerator pedal fails, analysis and improvements can be performed to improve the quality control of incoming parts inspection. This application is simple to operate, easy to use, safe and reliable, and easy to install and disassemble, significantly improving work efficiency. It also meets the test standard requirements in terms of practicality, safety, stability, and reliability.

[0024] Further, if Figure 1 As shown, the hydraulic assembly includes a hydraulic source 10 and a booster pump 11. The booster pump 11 delivers the hydraulic oil to the actuator 6 through the oil supply pipe 12. The actuator 6 returns the hydraulic oil to the hydraulic source 10 through the oil return pipe 13, so that the actuator 6 drives the piston rod 7 to perform reciprocating motion; a servo valve 14 is provided on the actuator 6, and the servo valve 14 is connected to the oil supply pipe 12 and the oil return pipe 13. The supply amount of the hydraulic oil is controlled by the servo valve 14; one end of the fixing clamp 3 is connected to the fixed base 1 through a fixing rod, and the side of the fixing clamp 3 away from the fixing rod is connected to the fixed base 1 through an adjusting rod 15, and the inclination angle of the fixing clamp 3 is changed by the adjusting rod 15.

[0025] In this embodiment, the hydraulic oil is stored in the hydraulic source 10, and the hydraulic oil is pressurized by the booster pump 11 connected to the hydraulic source 10, and is transported to the actuator 6 through the oil supply pipe 12 to provide power for the actuator 6, and then flows back to the hydraulic source 10 through the return oil pipe 13 connected to the actuator 6.

[0026] Preferably, the hydraulic oil is filtered through a precision oil filter through the oil supply pipe 12, stored in a high-pressure accumulator for pressure stabilization, and controlled by a servo valve 14 to enter the actuator 6, driving the piston movement of the actuator 6; when the hydraulic oil is recovered, the hydraulic oil is recovered to the hydraulic source 10 through the return oil pipe 13 connected to the servo valve 14 to the cooler and the return oil filter.

[0027] The fixing fixture 3 needs to clamp the accelerator pedal 4 so that the accelerator pedal 4 is in a horizontal state at the beginning of the experiment. Preferably, one end of the fixing fixture 3 is hinged on the fixing rod and connected to the fixed base 1 through the fixing rod. The fixing fixture 3 is slid away from one end of the fixing rod and connected to the adjusting rod 15, and the adjusting rod 15 is connected to the fixed base 1. The inclination angle of the fixing fixture 3 can be changed through the adjusting rod 15 so that the accelerator pedal 4 clamped on the fixing fixture 3 is in a horizontal position, that is, the accelerator pedal 4 is ensured to be perpendicular to the piston rod 7 of the actuator 6.

[0028] Further, if Figure 1 As shown, a rubber wheel 16 is provided at one end of the piston rod 7 away from the actuator 6, and the rubber wheel 16 abuts against the accelerator pedal 4 so that the accelerator pedal 4 changes its stroke opening as the piston rod 7 extends and retracts; a plurality of balancing rods 2 are arranged in a rectangular shape on the fixed base 1, so that the accelerator pedal 4 is arranged between the plurality of balancing rods 2; a movable crossbeam 5 is provided at one end of the plurality of balancing rods 2 away from the fixed base 1, and the movable crossbeam 5 slides along the balancing rods 2 so that the rubber wheel 16 abuts against the accelerator pedal 4.

[0029] In this embodiment, the hydraulic oil drives the piston rod 7 to perform telescopic movement in the vertical direction relative to the actuator 6, and a rubber wheel 16 is connected to the end of the piston rod 7 away from the actuator 6, and the rubber wheel 16 is abutted against the accelerator pedal 4, so that the piston rod 7 drives the accelerator pedal 4 to open and close, simulating the usage travel of the accelerator pedal 4.

[0030] Preferably, four balancing rods 2 are vertically connected to the fixed base 1, and the four balancing rods 2 are arranged in a rectangular shape. The fixing clamps 3 are arranged in the four balancing rods 2 distributed in a rectangular shape. Since a movable crossbeam 5 is slidingly arranged on the balancing rod 2, the movable crossbeam 5 can be adjusted up and down according to the distance between the accelerator pedal 4 and the piston rod 7, and when the preset experimental position is reached, the movable crossbeam 5 is fixed to ensure that the piston rod 7 is vertically abutted against the accelerator pedal 4 and does not apply pressure to the accelerator pedal 4, so that before the simulation experiment starts, the movable crossbeam 5 and the accelerator pedal 4 are parallel to each other.

[0031] like Figure 2 As shown, the present application also provides a testing method for an accelerator pedal life detection device, including a host computer 17, which is connected to the servo valve 14 to control the oil outlet pressure of the boost pump 11 to change the extension amount of the piston rod 7 to stretch or compress the accelerator pedal 4; the host computer 17 is connected to the pressure sensor 9 and the displacement sensor 8 to collect the load force of the pressure sensor 9 and the displacement of the displacement sensor 8.

[0032] Furthermore, the host computer 17 compares the load force measured by the pressure sensor 9 and the displacement measured by the displacement sensor 8 with the command signal respectively, and the host computer 17 outputs a control signal to the servo valve 14 according to the comparison result to control the pressure value of the hydraulic oil; an accelerator pedal sensor 18 is provided on the accelerator pedal 4, and the host computer 17 collects the signal voltage of the accelerator pedal sensor 18 to determine the endurance number of the accelerator pedal 4.

[0033] In this embodiment, host computer 17 can directly set the number of tests, test frequency, load force, and displacement. Host computer 17 is communicatively connected to accelerator pedal sensor 18, pressure sensor 9, and displacement sensor 7. It compares the feedback from accelerator pedal sensor 18, displacement sensor 8, and pressure sensor 9 with the command signal to determine the experimental state of accelerator pedal 4. If the feedback does not match the command signal, host computer 17 controls servo valve 14 to change the hydraulic oil outlet pressure, causing actuator 6 to drive piston rod 7 to move according to the preset value.

[0034] The host computer 17 simultaneously monitors the pressure of the actuator 6, the displacement of the piston rod 7, the working voltage, initial voltage, process voltage after pressing the accelerator pedal 4, and the maximum output voltage, and outputs a dynamic monitoring curve.

[0035] At the same time, the host computer 17 not only provides the required working power for the accelerator pedal sensor 18, pressure sensor 9, and displacement sensor 8, but also collects the signal voltage of the accelerator pedal sensor 18, the load force of the pressure sensor 9, and the displacement of the displacement sensor 8; and issues instructions to the servo valve 14 to control the pressure value of the hydraulic oil.

[0036] Preferably, the connecting line of the accelerator pedal sensor 18 is connected to the acquisition communication line of the host computer 17, and the host computer test software inputs the test number, test frequency, test pressure, throttle pressure and displacement protection upper and lower limits of the accelerator pedal 4; the upper and lower limits of the throttle pressure protection are set according to the starting force and ending force of the accelerator pedal 4. When the pressure exceeds the upper limit or is lower than the lower limit, the test bench will automatically stop the test and record the life endurance times.

[0037] The displacement range is calculated based on the travel angle of the accelerator pedal 4, and the upper and lower limits of the accelerator pedal 4 are set. When the displacement exceeds the upper limit or falls below the lower limit, the test bench automatically stops the test and records the life endurance times. The real-time test data and test curves of the host computer 17 can be imported into the computer through the test software for statistical analysis.

[0038] In addition, the signal voltage of the accelerator pedal sensor 18 changes with the opening of the accelerator pedal 4. The durability of the accelerator pedal 4 is monitored by collecting the signal voltage of the accelerator pedal sensor 18. After the life durability test is completed, the initial voltage and the maximum output voltage signal of the accelerator pedal 4 can be checked to see if they are abnormal.

[0039] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A device for detecting the life of an accelerator pedal, characterized in that: It includes a fixed base and a balancing rod, the balancing rod is arranged on the fixed base, and the fixed base is connected with a fixing fixture so that the accelerator pedal is arranged on the fixing fixture; A moving crossbeam is slidably provided on the balance bar, and an actuator is provided on the moving crossbeam. The actuator drives a piston rod through a hydraulic assembly to press the accelerator pedal, so that the accelerator pedal opens and closes; The actuator is provided with a displacement sensor to detect the displacement of the accelerator pedal, and the piston rod is provided with a pressure sensor to measure the load force applied to the accelerator pedal.

2. The accelerator pedal life detection device according to claim 1, characterized in that: The hydraulic assembly includes a hydraulic source and a booster pump. The booster pump delivers hydraulic oil to the actuator through an oil supply pipe. The actuator returns the hydraulic oil to the hydraulic source through an oil return pipe, so that the actuator drives the piston rod to reciprocate.

3. The accelerator pedal life detection device according to claim 2, characterized in that: The actuator is provided with a servo valve, which is connected to an oil supply pipe and an oil return pipe. The supply amount of hydraulic oil is controlled by the servo valve.

4. The accelerator pedal life detection device according to claim 1, characterized in that: One end of the fixing fixture is connected to the fixing base through a fixing rod, and the side of the fixing fixture away from the fixing rod is connected to the fixing base through an adjusting rod, and the inclination angle of the fixing fixture can be changed by the adjusting rod.

5. The accelerator pedal life detection device according to claim 2, characterized in that: A rubber wheel is provided at one end of the piston rod away from the actuator, and the rubber wheel abuts against the accelerator pedal so that the accelerator pedal changes its stroke opening as the piston rod extends and contracts.

6. The accelerator pedal life detection device according to claim 1, characterized in that: A plurality of balancing rods are arranged on a fixed base in a rectangular shape, so that the accelerator pedal is arranged between the plurality of balancing rods.

7. The accelerator pedal life detection device according to claim 6, characterized in that: A movable crossbeam is sleeved on one end of the plurality of balancing rods away from the fixed base. The movable crossbeam slides along the balancing rods so that the rubber wheel abuts against the accelerator pedal.

8. A method for testing an accelerator pedal life detection device, comprising the accelerator pedal life detection device according to claims 1 to 7, characterized in that: It includes a host computer, which is connected to the servo valve to control the oil outlet pressure of the boost pump to change the extension of the piston rod to stretch or compress the accelerator pedal; The host computer is connected to the pressure sensor and the displacement sensor to collect the load force of the pressure sensor and the displacement of the displacement sensor.

9. The testing method of the accelerator pedal life detection device according to claim 8, characterized in that: The host computer compares the load force measured by the pressure sensor and the displacement measured by the displacement sensor with the command signal respectively, and outputs a control signal to the servo valve according to the comparison result to control the pressure value of the hydraulic oil.

10. The testing method of the accelerator pedal life detection device according to claim 8, characterized in that: The accelerator pedal is provided with an accelerator pedal sensor. The host computer collects the signal voltage of the accelerator pedal sensor to determine the durability of the accelerator pedal.

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