Device for testing anti-road interference performance of steering gear

Abstract

The utility model discloses a device for testing the anti-road interference performance of a steering gear, which relates to the technical field of automobile part testing and comprises a test board and a test system, and the test system comprises a data acquisition module and a data analysis module. The test board comprises a base for supporting a steering system, a supporting seat for supporting tires and a driving device for driving the supporting seat to lift, and further comprises a torque sensor for detecting the torque of a steering wheel, and the torque sensor is electrically connected with the data acquisition module. According to the scheme, a bumpy road surface is simulated through the supporting seats arranged on the two sides of the base in a lifting mode, specific upward or downward road surface excitation is provided for tires, the torque of a steering wheel is collected, and the road surface interference resistance of the steering gear is analyzed by comparing the torque of the steering wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile component testing, in particular to a steering gear anti-road interference performance testing device. Background Art

[0002] With the development of the automobile industry, users have higher and higher requirements for vehicle driving experience and pay more attention to driving feel. When the vehicle is driving on a bumpy road, the tire contacts the ground and vibrates. The tire transmits the oscillation force caused by road excitation to the driver's hands step by step through the steering gear, steering column, and steering wheel, making the driver feel the steering wheel oscillation and the driving feel worse. The oscillation torque generated by road excitation can be suppressed by the steering gear, thereby improving the driver's feel experience; the steering gear has a torque sensor, which can identify the size and frequency of the oscillation torque and offset the oscillation torque by reverse superposition of anti-interference torque.

[0003] At present, the anti-road interference function of the steering gear can only be evaluated subjectively by the driver through the feel of the hand, and it is impossible to achieve quantitative evaluation. The existing test equipment cannot simulate the actual bumpy road surface of the steering system, and cannot reflect the performance of the steering gear in suppressing road interference.

[0004] For example, Chinese patent publication number CN105043736A, published on November 11, 2015, is titled "Spring testing device and testing method for motor vehicles", which includes a base and a vibration frame installed on the base, the base is provided with a first fixing part, and the vibration frame is provided with a second fixing part; the excitation source of the vibration frame is connected to a control unit, and the control unit pre-stores road spectrum data or is provided with a mechanism that can read road spectrum data. The motor vehicle spring testing method includes the following steps: A: obtaining road spectrum data; B: fixing the two ends of the spring to be tested by using the first fixing part and the second fixing part; C: the control unit controls the excitation source according to the road spectrum data, so that the vibration of the vibration frame is consistent with the road spectrum data.

[0005] The disadvantages of the existing patents are that the existing testing devices cannot actually simulate the bumpy road surface of the steering system and cannot reflect the performance of the steering gear in suppressing road interference. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that the existing test device cannot actually simulate the bumpy road surface of the steering system and cannot reflect the performance of the steering gear in suppressing road interference. A steering gear anti-road interference performance test device is provided, which simulates the bumpy road surface and detects and analyzes the steering gear suppression performance.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A steering gear anti-road interference performance test device, including a test bench and a test system, the test system including a data acquisition module and a data analysis module, the test bench including a base supporting the steering system, a support seat supporting the tire, and a driving device driving the support seat to rise and fall, and also including a torque sensor for detecting the steering wheel torque, the torque sensor being electrically connected to the data acquisition module. The steering gear anti-road interference performance test device described in this scheme simulates a bumpy road surface by lifting and lowering the support seats set on both sides of the base, providing the tire with specific upward or downward road excitation, and the driving device can adjust the force loading and loading frequency according to actual needs. The steering system includes a steering gear, a steering column and a steering wheel, etc. The steering gear is provided with a torque sensor and a power-assisted motor, and the oscillation torque is offset by reverse superposition of anti-interference torque. The torque sensor collects the torque of the steering wheel, and analyzes the anti-road interference performance of the steering gear by comparing the torque of the steering wheel. This solution realizes the simulation of external road excitation torque with specific frequency and characteristic amplitude through the drive device and the support seat. It is suitable for excitation simulation of different road surfaces and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications. The control parameters of the steering gear can be modified to control the reverse superimposed anti-interference torque. By collecting and analyzing the torque of the steering wheel, the optimal control parameters can be selected in turn for directional quantitative parameter optimization, which has stronger functionality.

[0009] Preferably, there are two support seats, which are lifted and lowered on both sides of the base by a driving device. The support seats are located at both ends of the base and are used to support tires on both sides of the steering system to achieve road excitation simulation under vehicle working conditions.

[0010] Preferably, the base is slidably connected to the support seat via a guide rail assembly, the guide rail assembly comprises a guide rail vertically arranged on the side wall of the base and a guide groove matched with the guide rail, a support frame is arranged at the lower end of the support seat, and the guide groove is arranged on the support frame. The guide rail and the guide groove cooperate to make the support seat rise and fall in the vertical direction, providing upward or downward road excitation for the tire.

[0011] Preferably, the driving device is a hydraulic linear actuator, which includes an output shaft connected to the support seat. The hydraulic linear actuator is used to vertically load the tires on both sides with a maximum force of 20KN and a loading frequency of 20Hz, which can basically cover the force range and frequency range of the steering gear tie rod of small and medium-sized vehicles.

[0012] Preferably, the output end of the output shaft is provided with a ball bearing, the ball bearing comprises an outer ring fixed to the output end of the output shaft and an inner ring matched with the outer spherical surface, the lower end of the support seat is provided with a connecting seat and a connecting rod arranged on the connecting seat, the connecting rod passes through the inner ring. The spherical surface matching has the advantages of corrosion resistance, impact resistance and wear resistance.

[0013] Preferably, a connecting hole is provided on the inner ring, and the inner diameter of the connecting hole is larger than the outer diameter of the connecting rod.

[0014] Preferably, the output end of the output shaft is provided with a clamp, and the clamp locks the outer ring of the ball bearing by bolts. The clamp is sleeved on the outer side of the ball bearing, and the clamp locks the ball bearing by bolts.

[0015] Preferably, the central axis of the output shaft is perpendicular to the central axis of the connecting rod, and the central axis of the connecting hole is perpendicular to the central axis of the output shaft.

[0016] Preferably, there are two support frames on any one support seat, and there are two guide rails on the side wall on any side of the base. The support frames correspond to the guide rails one by one, and the two support frames on any one support seat are respectively located on both sides of the driving device.

[0017] Preferably, the vehicle further comprises a counterweight disposed on the sub-frame assembly, and the steering gear performance test under different load conditions can be achieved by adjusting the counterweight.

[0018] During operation, the mechanical system to be measured, the load system and the control system are set on the test bench. The mechanical system includes mechanical structures such as the steering gear, steering gear column, steering wheel, and subframe. The load system uses the tires of the actual vehicle as the main simulation device, and adjusts the load force by adjusting the pressure or weight on the subframe. The control system includes a power supply, a sensor, a data acquisition module, a data analysis module, etc. Change one or more combinations of the load size, the road excitation torque size, and the size of the steering gear control parameters, analyze the anti-road interference performance of the steering gear and the optimal control parameters of the steering gear through the change of the steering wheel torque, achieve the optimal reverse superposition anti-interference torque, and optimize the design parameters of the steering gear. The data acquisition module collects data such as the steering wheel torque, the road excitation torque, and the control parameters of the steering gear. The data analysis device analyzes the changes in the steering wheel torque under any variable to analyze the anti-road interference performance of the steering gear.

[0019] The test device in this scheme has a simple structure and adopts a semi-simulation test device, which is more purposeful and greatly reduces the cost of the test equipment.

[0020] Therefore, the utility model has the following beneficial effects: by lifting the support seats arranged on both sides of the base to simulate bumpy roads, specific upward or downward road excitation is provided to the tires, the steering wheel torque is collected, and the steering gear's anti-road interference performance is analyzed by comparing the steering wheel torque; the external road excitation torque simulation of specific frequency and characteristic amplitude is realized through the drive device and the support seat, which is suitable for excitation simulation of different road surfaces and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; it has a strong purpose and greatly reduces the cost of test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the connection between the output shaft and the connecting seat in the utility model.

[0023] Figure 3 It is a structural schematic diagram of the output end of the output shaft in the utility model.

[0024] Figure 4 It is a sectional view of the output end of the output shaft in the utility model.

[0025] As shown in the figure:

[0026] Base 1,

[0027] Support seat 2, support frame 2.1, connecting seat 2.2, connecting rod 2.3,

[0028] Driving device 3, output shaft 3.1, clamp 3.2,

[0029] Guide rail assembly 4, guide rail 4.1, guide groove 4.2,

[0030] Ball bearing 5, outer ring 5.1, inner ring 5.2, connecting hole 5.3. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the technical solution embodiments of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Embodiment 1, as Figure 1 A steering gear anti-road interference performance test device shown in the figure includes a test bench and a test system. The test system includes a data acquisition module and a data analysis module. The test bench includes a base 1 for supporting the steering system, a support seat 2 for supporting the tire, and a driving device 3 for driving the support seat 2 to rise and fall. It also includes a torque sensor for detecting the steering wheel torque. The torque sensor is electrically connected to the data acquisition module.

[0033] In the above embodiment, a steering gear anti-road interference performance test device simulates a bumpy road by lifting the support seat 2 set on both sides of the base 1, providing a specific upward or downward road excitation to the tire, and the driving device 3 can adjust the force loading and loading frequency according to actual needs. The steering system includes a steering gear, a steering column and a steering wheel, etc. The steering gear is provided with a torque sensor and a power motor, and the oscillation torque is offset by reverse superposition of anti-interference torque. The torque sensor collects the torque of the steering wheel, and the anti-road interference performance of the steering gear is analyzed by comparing the torque of the steering wheel. This scheme realizes the external road excitation torque simulation of specific frequency and characteristic amplitude through the driving device 3 and the support seat 2, which is suitable for excitation simulation of different road surfaces, and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; the control parameters of the steering gear can be modified to control the reverse superposition of anti-interference torque, and the optimal control parameters can be selected in turn by collecting and analyzing the torque of the steering wheel. Targeted quantitative parameter optimization has stronger functionality.

[0034] Due to the development of the automobile industry, users have higher and higher requirements for vehicle driving experience and pay more attention to driving feel. When the vehicle is driving on a bumpy road, the tire contacts the ground and vibrates. The tire transmits the oscillation force caused by road excitation to the driver's hand step by step through the steering gear, steering column, and steering wheel, so that the driver feels the steering wheel oscillation and the driving feel deteriorates. The oscillation torque generated by road excitation can be suppressed by the steering gear, thereby improving the driver's hand feeling experience; the steering gear has its own torque sensor, which can identify the size and frequency of the oscillation torque and offset the oscillation torque by reverse superposition of anti-interference torque. This solution simulates road excitation, analyzes the steering gear's anti-road interference performance by collecting, analyzing and comparing the changes in steering wheel torque, and solves the problem that the anti-road interference function of the steering gear can suppress the oscillation torque from road excitation. At present, it can only be evaluated subjectively by the driver through the feel, and quantitative evaluation cannot be achieved. It solves the problem that the existing test device cannot actually simulate the bumpy road surface of the steering system and cannot reflect the performance of the steering gear in suppressing road interference.

[0035] The utility model has the following beneficial effects: by lifting the support base 2 arranged on both sides of the base 1, a bumpy road is simulated, specific upward or downward road excitation is provided to the tire, the steering wheel torque is collected, and the steering gear's anti-road interference performance is analyzed by comparing the steering wheel torque; the external road excitation torque simulation of specific frequency and characteristic amplitude is realized through the drive device 3 and the support base 2, which is suitable for excitation simulation of different road surfaces, and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; it has a strong purpose and greatly reduces the cost of test equipment.

[0036] Embodiment 2, as Figure 1 , Figure 2 , Figure 3 , Figure 4 A steering gear anti-road interference performance test device shown in the figure includes a test bench and a test system. The test system includes a data acquisition module and a data analysis module. The test bench includes a base 1 for supporting the steering system, a support seat 2 for supporting the tire, and a driving device 3 for driving the support seat 2 to rise and fall. It also includes a torque sensor for detecting the steering wheel torque. The torque sensor is electrically connected to the data acquisition module.

[0037] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, there are two support seats 2, and the support seats 2 are set on both sides of the base 1 by the driving device 3. The base 1 and the support seat 2 are slidably connected by the guide rail assembly 4, and the guide rail assembly 4 includes a guide rail 4.1 vertically arranged on the side wall of the base 1 and a guide groove 4.2 matched with the guide rail 4.1. The lower end of the support seat 2 is provided with a support frame 2.1, and the guide groove 4.2 is arranged on the support frame 2.1. The problem that the anti-road interference function of the steering gear can specifically suppress the oscillation torque from the road excitation can only be subjectively evaluated by the driver through the feel, and quantitative evaluation cannot be achieved. The problem that the existing test device cannot actually simulate the bumpy road surface of the steering system and cannot reflect the performance of the steering gear in suppressing road interference.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the support seat 2 set on both sides of the base 1 is lifted to simulate the bumpy road surface, providing the tire with specific upward or downward road excitation, and the driving device 3 can adjust the force loading and loading frequency according to actual needs. The steering system includes a steering gear, a steering column and a steering wheel, etc. The steering gear is provided with a torque sensor and a power motor, and the oscillation torque is offset by reverse superposition of anti-interference torque. The torque sensor collects the torque of the steering wheel, and the anti-road interference performance of the steering gear is analyzed by comparing the torque of the steering wheel. This scheme realizes the external road excitation torque simulation of specific frequency and characteristic amplitude through the driving device 3 and the support seat 2, which is suitable for excitation simulation of different road surfaces, and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; the control parameters of the steering gear can be modified to control the reverse superposition of anti-interference torque, and the optimal control parameters can be selected in turn by collecting and analyzing the torque of the steering wheel. Directional quantitative parameter optimization has stronger functionality. The support seat 2 is located at both ends of the base 1, which is used to support the tires located on both sides of the steering system to realize road excitation simulation under vehicle working conditions. The guide rail 4.1 and the guide groove 4.2 cooperate to enable the support seat 2 to rise and fall in the vertical direction, providing upward or downward road excitation for the tire.

[0039] On the basis of the second embodiment, the driving device 3 is further optimized, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the specific scheme is a steering gear anti-road interference performance test device, including a test bench and a test system, the test system includes a data acquisition module and a data analysis module, the test bench includes a base 1 supporting the steering system, a support seat 2 supporting the tire, and a driving device 3 driving the support seat 2 to rise and fall, and also includes a torque sensor for detecting the steering wheel torque, and the torque sensor is electrically connected to the data acquisition module. There are two support seats 2, and the support seats 2 are set on both sides of the base 1 through the driving device 3. The base 1 and the support seat 2 are slidably connected through a guide rail assembly 4, and the guide rail assembly 4 includes a guide rail 4.1 vertically arranged on the side wall of the base 1 and a guide groove 4.2 matched with the guide rail 4.1. The lower end of the support seat 2 is provided with a support frame 2.1, and the guide groove 4.2 is arranged on the support frame 2.1.

[0040] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the driving device 3 is a hydraulic linear actuator, which includes an output shaft 3.1, and the output shaft 3.1 is connected to the support seat 2. The hydraulic linear actuator is used to vertically load the tires on both sides, and a maximum force of 20KN is achieved, and a loading frequency of 20Hz is achieved, which can basically cover the force range and frequency range of the steering gear tie rod of small and medium-sized vehicles. A ball bearing 5 is provided at the output end of the output shaft 3.1, and the ball bearing 5 includes an outer ring 5.1 fixed to the output end of the output shaft 3.1 and an inner ring 5.2 spherically matched with the outer ring 5.1. A connecting seat 2.2 and a connecting rod 2.3 arranged on the connecting seat are provided at the lower end of the support seat 2, and the connecting rod 2.3 passes through the inner ring 5.2. The spherical fit has the advantages of corrosion resistance, impact resistance, and wear resistance. A connecting hole 5.3 is provided on the inner ring 5.2, and the inner diameter of the connecting hole 5.3 is larger than the outer diameter of the connecting rod 2.3. The output end of the output shaft 3.1 is provided with a clamp 3.2, and the clamp 3.2 is bolted to the outer ring 5.1 of the ball bearing 5. The clamp 3.2 is sleeved on the outside of the ball bearing 5, and the clamp 3.2 is bolted to the ball bearing 5. The central axis of the output shaft 3.1 is perpendicular to the central axis of the connecting rod 2.3, and the central axis of the connecting hole 5.3 is perpendicular to the central axis of the output shaft 3.1. The number of support frames 2.1 on any one of the support seats 2 is two, and the number of guide rails 4.1 on the side wall on any side of the base 1 is two, and the support frames 2.1 correspond to the guide rails 4.1 one by one, and the two support frames 2.1 on any one of the support seats 2 are respectively located on both sides of the drive device 3.

[0041] Further optimization also includes a counterweight installed on the subframe assembly. The steering gear performance test under different load conditions can be achieved by adjusting the counterweight.

[0042] In the above embodiment, a steering gear anti-road interference performance test device simulates a bumpy road by lifting the support seat 2 set on both sides of the base 1, providing a specific upward or downward road excitation to the tire, and the driving device 3 can adjust the force loading and loading frequency according to actual needs. The steering system includes a steering gear, a steering column and a steering wheel, etc. The steering gear is provided with a torque sensor and a power motor, and the oscillation torque is offset by reverse superposition of anti-interference torque. The torque sensor collects the torque of the steering wheel, and the anti-road interference performance of the steering gear is analyzed by comparing the torque of the steering wheel. This scheme realizes the external road excitation torque simulation of specific frequency and characteristic amplitude through the driving device 3 and the support seat 2, which is suitable for excitation simulation of different road surfaces, and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; the control parameters of the steering gear can be modified to control the reverse superposition of anti-interference torque, and the optimal control parameters can be selected in turn by collecting and analyzing the torque of the steering wheel. Targeted quantitative parameter optimization has stronger functionality.

[0043] The problem that the anti-road interference function of the steering gear can suppress the oscillation torque from road excitation can only be evaluated subjectively by the driver through the feel of the hand, and quantitative evaluation cannot be achieved. The problem that the existing test device cannot simulate the bumpy road surface of the steering system and cannot reflect the performance of the steering gear in suppressing road interference can be solved.

[0044] During operation, the mechanical system to be measured, the load system and the control system are set on the test bench. The mechanical system includes mechanical structures such as the steering gear, steering gear column, steering wheel, and subframe. The load system uses the tires of the actual vehicle as the main simulation device, and adjusts the load force by adjusting the pressure or weight on the subframe. The control system includes a power supply, a sensor, a data acquisition module, a data analysis module, etc. Change one or more combinations of the load size, the road excitation torque size, and the size of the steering gear control parameters, and analyze the steering gear's anti-road interference performance and the steering gear's optimal control parameters through the change of the steering wheel torque, so as to achieve the optimal reverse superposition anti-interference torque and optimize the design parameters of the steering gear. The data acquisition module collects data such as the steering wheel torque, the road excitation torque, and the control parameters of the steering gear. The data analysis device analyzes the change of the steering wheel torque under any variable to analyze the steering gear's anti-road interference performance.

[0045] The test device in this scheme has a simple structure and adopts a semi-simulation test device, which is more purposeful and greatly reduces the cost of the test equipment.

[0046] The utility model has the following beneficial effects: by lifting the support base 2 arranged on both sides of the base 1, a bumpy road is simulated, specific upward or downward road excitation is provided to the tire, the steering wheel torque is collected, and the steering gear's anti-road interference performance is analyzed by comparing the steering wheel torque; the external road excitation torque simulation of specific frequency and characteristic amplitude is realized through the drive device 3 and the support base 2, which is suitable for excitation simulation of different road surfaces, and can be used for C-EPS, DP-EPS, R-EPS, etc., with a wider range of applications; it has a strong purpose and greatly reduces the cost of test equipment.

[0047] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation scope of the present invention. All equivalent changes made in accordance with the shape and structure of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering gear anti-road interference performance testing device, characterized in that: The invention comprises a test bench and a test system, wherein the test system comprises a data acquisition module and a data analysis module, the test bench comprises a base for supporting a steering system, a support seat for supporting a tire, and a driving device for driving the support seat to rise and fall, and also comprises a torque sensor for detecting the steering wheel torque, wherein the torque sensor is electrically connected to the data acquisition module.

2. A steering gear anti-road interference performance testing device according to claim 1, characterized in that: The number of the support seats is two, and the support seats are lifted and lowered on both sides of the base by a driving device.

3. A steering gear anti-road interference performance testing device according to claim 2, characterized in that: The base is slidably connected to the support seat via a guide rail assembly, which includes a guide rail vertically arranged on the side wall of the base and a guide groove cooperating with the guide rail. A support frame is provided at the lower end of the support seat, and the guide groove is arranged on the support frame.

4. A steering gear anti-road interference performance testing device according to claim 1, 2 or 3, characterized in that: The driving device is a hydraulic linear actuator, and the hydraulic linear actuator comprises an output shaft, and the output shaft is connected to the support seat.

5. A steering gear anti-road interference performance testing device according to claim 4, characterized in that: A ball bearing is provided at the output end of the output shaft, and the ball bearing includes an outer ring fixed to the output end of the output shaft and an inner ring matched with the outer spherical surface. A connecting seat and a connecting rod arranged on the connecting seat are provided at the lower end of the support seat, and the connecting rod passes through the inner ring.

6. A steering gear anti-road interference performance testing device according to claim 5, characterized in that: The inner ring is provided with a connecting hole, and the inner diameter of the connecting hole is larger than the outer diameter of the connecting rod.

7. A steering gear anti-road interference performance testing device according to claim 6, characterized in that: The output end of the output shaft is provided with a clamp, and the clamp is used to lock the outer ring of the ball bearing through bolts.

8. A steering gear anti-road interference performance testing device according to claim 7, characterized in that: The central axis of the output shaft is arranged perpendicularly to the central axis of the connecting rod, and the central axis of the connecting hole is arranged perpendicularly to the central axis of the output shaft.

9. The device for testing the anti-road interference performance of a steering gear according to claim 3, characterized in that: There are two support frames on any one support seat, and there are two guide rails on the side wall on any side of the base. The support frames correspond to the guide rails one by one, and the two support frames on any one support seat are respectively located on both sides of the driving device.

10. A steering gear anti-road interference performance testing device according to claim 1, 2 or 3, characterized in that: Also included is a counterweight component arranged on the sub-frame assembly.

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