阅读说明：本技术 一种用于车辆转向性能的测试系统 (Test system for vehicle steering performance ) 是由 田胜利 孙建树 王栋 吴东军 于 2021-09-29 设计创作，主要内容包括：本发明涉及车辆测试领域,公开了一种用于车辆转向性能的测试系统,包括测试台、主机、监测电脑和方向盘传感器、底座,其中本测试系统还包括夹具组件、输入轴加载组件、转向轮传感器,转向轮传感器用于检测转向轮转角,夹具组件用于对转向轮施加负载,底座一端设有斜面,另一端上表面分别对称安装有第一防偏辊,四个第一防偏辊通过辊轴座固定于底座上表面,两个底座另一端设有夹具组件,两个夹具组件和底座通过第一横板连接定位,两个底座之间通过第二横板定位,在底座上靠近夹具组件一端上表面开有矩形槽,本发明可用于对车辆的转向系统进行传动间隙测试和传动比测试。(The invention relates to the field of vehicle testing, and discloses a system for testing the steering performance of a vehicle, which comprises a test board, a host, a monitoring computer, a steering wheel sensor and a base, wherein the test system also comprises a clamp component, an input shaft loading component and a steering wheel sensor, the steering wheel sensor is used for detecting the steering wheel angle, the clamp component is used for applying load to the steering wheel, one end of the base is provided with an inclined plane, the upper surface of the other end is respectively and symmetrically provided with first anti-deviation rollers, the four first anti-deviation rollers are fixed on the upper surface of the base through roller shaft seats, the other ends of the two bases are provided with clamp components, the two clamp components and the base are connected and positioned through first transverse plates, the two bases are positioned through second transverse plates, the upper surface of one end of the base, which is close to the clamp assembly, is provided with the rectangular groove, and the rectangular groove testing device can be used for testing the transmission clearance and the transmission ratio of a steering system of a vehicle.)

1. A test system for the steering performance of vehicles comprises a test bench, a host, a monitoring computer and a steering wheel sensor, wherein the test bench comprises a base, it is characterized by also comprising a clamp assembly, an input shaft loading assembly and a steering wheel sensor, wherein the steering wheel sensor is used for detecting the rotation angle of a steering wheel, the fixture assembly is used for applying load to a steering wheel, one end of each of the two bases is provided with an inclined surface, the upper surfaces of the other ends of the two bases are respectively and symmetrically provided with a first anti-deviation roller, the four first anti-deviation rollers are fixed on the upper surfaces of the bases through roller shaft seats, the other ends of the two bases are provided with fixture assemblies, the two fixture assemblies are connected through a first transverse plate, the two fixture assemblies are respectively connected and positioned with the two bases through limiting plates, the two bases are positioned through a second transverse plate, and the upper surface of one end, close to the fixture assemblies, of each base is provided with a rectangular groove;

the clamp assembly further comprises a bottom plate and an angle plate assembly, an electromagnetic brake is mounted on the upper portion of the bottom plate, a rotating shaft is connected to the center of the electromagnetic brake, the lower end of the rotating shaft is mounted on the bottom plate through a bearing, a first angle sensor is connected to the circumferential surface of the rotating shaft, supporting web plates are mounted on the surface of the upper end of the rotating shaft, side plate assemblies are connected to the end portions of the two supporting web plates, and the side plate assemblies and the angle plate assemblies are hinged through hinge shafts; the input shaft loading assembly comprises an adjusting frame and a servo motor, the adjusting frame comprises a first adjusting seat, a second adjusting seat and an L-shaped supporting seat, the first adjusting seat comprises a clamping sleeve and a clamping seat, the clamping sleeve is sleeved with the L-shaped supporting seat and locked and fixed through a bolt, the first adjusting seat and the clamping seat are fixedly connected through a bolt, trapezoidal notches are formed in the first adjusting seat and the clamping seat, adjusting grooves are symmetrically formed in the surface of the second adjusting seat, the second adjusting seat penetrates through the adjusting grooves through the bolt and is fixed to the upper portion of the L-shaped supporting seat, a speed reducer is fixed to the upper portion of the second adjusting seat and is driven through the servo motor, a second angle sensor and a torque sensor are sleeved on an output shaft of the speed reducer, the angle sensor and the torque sensor are fixed through a support, and the other end of the support is connected into the sliding groove of the L-shaped supporting seat in a sliding mode, the lower end of the output shaft is connected with a quick adaptive joint, and the servo motor, the second angle sensor and the torque sensor are all connected with a host.

2. The system of claim 2, wherein the side plate assembly comprises symmetrically arranged wing plates, the two wing plates comprise a flat plate and an inclined plate, the flat plate and the inclined plate are an integral mechanism, an included angle is formed between the flat plate and the inclined plate, a first rotating roller and a second rotating roller are connected between the inclined plates, a screw rod, a guide pin and a hinge shaft are connected between the flat plates, the first rotating roller and the second rotating roller are respectively wrapped by a first rubber roller and a second rubber roller, the diameter of the first rubber roller is larger than that of the second rubber roller, the second rotating roller is fixed between two lugs on the wing plates, the upper surfaces of the two flat plates are fixed with a second anti-deflection roller through shaft seats, the corner plate assembly comprises a first supporting plate and a second supporting plate, and third anti-deflection rollers are fixed on two sides of the second supporting plate through shaft seats, the lower surface of the first supporting plate is fixedly provided with a first buffer block, and the lower surface of the second supporting plate is fixedly provided with a second buffer block.

3. The system for testing the steering performance of the vehicle according to claim 3, wherein the screw rod and the guide pin are connected with clamping plates, rubber blocks are fixed on the vertical surfaces of one sides of the two clamping plates, and a hexagonal part is integrally formed at one end of the screw rod.

4. The system for testing the steering performance of a vehicle according to claim 1, the steering wheel sensor comprises a shell and a sealing cover, the shell is connected with the sealing cover in a matching way, the shell is provided with a clamping jaw, the outer surface of the shell is of a cylindrical structure, the bottom of the shell is provided with a bulge, the upper surface of the bulge is provided with a first shaft seat, a bearing is arranged in the first shaft seat, a second shaft seat is arranged at the center of the inner surface of the sealing cover, a central shaft is arranged between the shell and the sealing cover, the joint of the central shaft and the shell, and bearings are respectively arranged at the joints of the central shaft and the sealing cover, an angle gauge is arranged on the circumferential surface of the central shaft, the angle gauge is positioned in a cavity of the shell, and the steering wheel sensor is arranged in a through hole in the center of the vehicle hub through a clamping jaw on the shell.

5. The system for testing the steering performance of the vehicle according to claim 1, wherein the steering wheel sensor comprises a rotating disc and a support, the steering wheel sensor is fixed on the steering wheel of the vehicle through the support, and the steering wheel sensor are both connected with the monitoring computer.

6. The vehicle steering performance testing system according to any one of claims 1 to 5, wherein the use process thereof includes a steering system clearance test and a steering system transmission ratio test; the steering system clearance test comprises the following steps:

firstly, detecting a second supporting plate of an angle plate to ensure that the second supporting plate is in a horizontal position, and the second supporting plate is positioned in a rectangular groove of a base to ensure that vehicle wheels drive in along the central position of the base;

step two, driving the vehicle steering wheel to the upper surface of the second support plate, pressing the first support plate down on the upper end surface of the rotating shaft after continuously driving forwards, supporting the upper end surface of the rotating shaft against the first support plate, controlling the vehicle to stop forwards and applying parking brake to the vehicle at the moment, and stopping the steering wheel on the clamp assembly at the moment;

step three, placing the vehicle steering wheel in a centering manner, removing the vehicle steering wheel and the steering column decorative cover, then preliminarily fixing the input shaft loading assembly to the vehicle steering column, firmly connecting the quick adapting joint with the steering shaft of the vehicle, and then firmly fixing the first adjusting seat, the second adjusting seat and the L-shaped supporting seat in the input shaft loading assembly on the vehicle steering column;

fourthly, the electromagnetic brake works to brake the rotating shaft in the clamp assembly by operating the host; step five, controlling the servo motor to input preset torque to the vehicle steering shaft through the operation host,

because the steering wheel is fixed, after the servo motor drives the steering shaft to rotate to the extreme position, the motor drives the steering shaft to rotate reversely after the torque value on the output shaft of the servo motor is larger than the preset numerical value in the host, and after the steering shaft is driven reversely to the extreme position, the torque value on the output shaft of the servo motor is larger than the preset numerical value in the host again, the servo motor rotates reversely to rotate back to the positive state and stops driving the steering shaft;

repeating the previous operation step for multiple times, recording the clearance data of the vehicle steering shaft in the host, manually reading the clearance value data of the vehicle steering system captured in the host to compare with a standard value, and analyzing whether the clearance value of the vehicle steering system meets the standard or not;

the steering system transmission ratio test comprises the following steps:

firstly, mounting a steering wheel sensor inside a central through hole of a vehicle hub, and mounting a steering wheel sensor on a vehicle steering wheel;

step two, testing the vehicle on the road and keeping the speed constant, and capturing dynamic data of the transmission ratio between a steering wheel and a steering wheel of the vehicle in a detection computer at the moment;

changing the vehicle speed and keeping the vehicle speed constant, and capturing the transmission ratio data of the vehicle steering system again;

changing the speed of the vehicle, and repeating the previous operation for the third time to capture the transmission ratio data of the vehicle steering system;

and step five, through three groups of tests at different vehicle speeds, the monitoring computer records the dynamic data of the transmission ratio of the vehicle steering system at different vehicle speeds, manually reads the dynamic data of the transmission ratio of the vehicle steering system to compare with a standard value, and analyzes whether the data of the transmission ratio of the vehicle steering system meets the standard.

Technical Field

The invention relates to the field of vehicle testing, in particular to a vehicle steering performance testing system.

Background

The automobile steering system is an important component of the whole automobile and has the function of ensuring that the automobile can steer to run according to the intention of a driver. The performance of the automobile steering system directly influences the driving comfort, safety and energy consumption of the automobile. The steering system with good performance can not only improve the driving comfort and reduce the fatigue of the driver, but also ensure the safe driving of the automobile. Due to accident collision or fatigue wear of steering system parts of an automobile, after a steering system is overhauled and replaced, relevant data of the steering system of the automobile needs to be tested, and the automobile can be allowed to run on the road only after a test result of the steering system meets a standard requirement.

The existing vehicle steering performance test system mostly carries out measurement under the condition that no load is applied to a vehicle steering system under a static state, the measurement method has the great disadvantage, and the detected data of the vehicle steering system and the data of the vehicle steering system have great difference when the load exists. The steering performance of the vehicle can be reflected under a dynamic environment under most conditions, and the measured data is inaccurate due to the limitation of the existing measuring instrument and measuring method, so that the vehicle can not be effectively guided to be maintained, or the accurate test of the vehicle steering system data can not be effectively completed after the vehicle is maintained, and further whether the maintained vehicle steering system data is in a standard requirement range can not be determined, so that the vehicle has great potential safety hazard after driving on the road.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a test system for vehicle steering performance, which comprises a steering system transmission clearance test and a steering system transmission ratio test. When the steering system is used for testing the transmission clearance, the steering wheel is locked through the clamp assembly, the special input end loading assembly is used for inputting steering force and monitoring data, and the host is used for analyzing the data; during the transmission ratio test, dynamic data of a steering system under the running state of the vehicle are measured by respectively mounting a steering wheel sensor and a steering wheel sensor on a wheel steering wheel and a steering wheel.

In order to achieve the purpose, the invention provides the following technical scheme: the test bench comprises bases, wherein one ends of the two bases are provided with inclined planes, and the inclined planes have a guiding effect on wheels, so that the wheels can smoothly drive into the bases.

Further, two base other end upper surface is the symmetry respectively and is installed first anti-deviation roller, four first anti-deviation roller is fixed in the base upper surface through the axle bed, and base upper surface mounting's first anti-deviation roller can realize that when the wheel moves ahead along the base upper surface and deviates base axis position, the tire extrusion is first when preventing the deviation roller will cross and prevent the deviation roller, and the rotation through first anti-deviation roller lets the wheel return to the base upper surface, the effectual phenomenon of having avoided breaking away from the base because of the directive wheel that the wheel leads to.

Two the base other end respectively is equipped with the anchor clamps subassembly, two the anchor clamps subassembly is connected through first diaphragm, two the anchor clamps subassembly respectively passes through limiting plate and two base connection location, two pass through the second diaphragm location between the base it has the rectangular channel to be close to anchor clamps subassembly one end upper surface opening on the base.

Furthermore, the rectangular channel that base one end upper surface was opened has realized holding the purpose of second backup pad tip in the anchor clamps subassembly to play the supporting role when being in horizontal position to the second backup pad, steering wheel sensor and steering wheel sensor all are connected with the monitoring computer, and the detection computer is used for calculating and the analysis to the data that steering wheel sensor and steering wheel sensor caught, and can be with the audio-visual data that demonstrate the monitoring of the mode of digit and diagram.

The clamp assembly further comprises a bottom plate and an angle plate assembly, an electromagnetic brake is installed on the upper portion of the bottom plate, a rotating shaft is connected to the center of the electromagnetic brake, and the electromagnetic brake and the rotating shaft are matched to achieve the purpose of locking the rotating shaft when the electromagnetic brake is powered on, so that the scene of lateral acting force of the road surface when a vehicle steering wheel runs can be simulated, the measurement of the transmission gap of the steering system is more accurate, and the rotating shaft is in an unlocking state when the electromagnetic brake is powered off.

Further, the lower end of the rotating shaft is connected with the bottom plate through a bearing, and the rotating shaft is connected with a first angle sensor.

Furthermore, the first angle sensor arranged on the circumferential surface of the rotating shaft can accurately detect the rotating angle of the rotating shaft, so that the rotating angle of the steering wheel fixed on the clamp assembly can be monitored in real time, the transmission clearance data of the steering system can be measured when the steering wheel is at different steering angles, and the monitoring range of the transmission clearance data of the steering system by the equipment is greatly improved.

The surface mounting of pivot upper end has the support web, two support web end connection has the curb plate subassembly, curb plate subassembly and scute subassembly are articulated through the hinge, electromagnetic braking ware, first angle sensor all are connected with the host computer.

Further, the side plate assembly and the angle plate assembly are connected through a hinge shaft, the angle plate inclination angle is variable, when a second supporting plate in the angle plate is in a horizontal position, a complete channel is formed by matching the end part of the second supporting plate with a rectangular groove at the end part of the base, the steering wheel can continuously roll forwards to a first supporting plate in the angle plate through the channel, a downward force is formed on the first supporting plate, the first supporting plate is pressed downwards by the rolling steering wheel, the first supporting plate and the second supporting plate rotate around the hinge shaft synchronously at the moment, the second supporting plate is lifted when the first supporting plate falls, the steering wheel successfully rolls right above the clamp assembly, and when the second supporting plate is lifted, the purpose of clamping and limiting the steering wheel can be achieved.

The input shaft loading assembly comprises an adjusting frame and a servo motor, the adjusting frame comprises a first adjusting seat, a second adjusting seat and an L-shaped supporting seat, the first adjusting seat comprises a clamping sleeve and a clamping seat, the clamping sleeve is sleeved on the L-shaped supporting seat and fixed through a bolt, and the clamping sleeve and the clamping seat are matched to achieve the adjusting effect on the adjusting frame and can adapt to vehicle steering columns of different specifications.

Furthermore, the first adjusting seat is fixedly connected with the clamping seat through a bolt, trapezoidal notches are formed in the first adjusting seat and the clamping seat, the clamping effect on a steering column when the first adjusting seat and the clamping seat are combined is achieved through the trapezoidal notches, so that the input shaft loading assembly is preliminarily fixed on the steering column, adjusting grooves are symmetrically formed in the surface of the second adjusting seat, the second adjusting seat penetrates through the adjusting grooves through the bolt to be fixed on the upper portion of the L-shaped supporting seat, the adjusting grooves are formed in the design of the adjusting grooves, and the second adjusting seat can be adjusted on the L-shaped supporting seat along the adjusting grooves, so that the adaptability of the input shaft loading assembly is enhanced.

And a speed reducer is fixed on the upper part of the second adjusting seat, the speed reducer is driven by a servo motor, and a second angle sensor and a torque sensor are sleeved on an output shaft of the speed reducer.

Furthermore, a second angle sensor and a torque sensor which are arranged on the output shaft of the speed reducer can capture the rotation angle of the steering column and the torque generated by the steering column rotating for a certain angle, and transmit the captured data to a host computer for analysis and calculation.

The second angle sensor and the torque sensor are fixed through the support, the other end of the support is connected in the sliding groove of the L-shaped supporting seat in a sliding mode, the support and the sliding groove can be matched with the second adjusting seat, when the support is adjusted along the adjusting groove, the support slides in the sliding groove in a reciprocating mode, and the support is fixed in the sliding groove and can slide in the reciprocating mode to provide supporting force for the second angle sensor and the torque sensor.

Furthermore, the lower end of the output shaft is connected with a quick-adaptation joint, wherein the quick-adaptation joint can be matched and replaced according to the steering shaft of the detected steering column, and the servo motor, the second angle sensor and the torque sensor are all connected with the host.

The curb plate subassembly includes symmetrical arrangement's pterygoid lamina, two the pterygoid lamina includes flat board and swash plate, flat board and swash plate are an overall structure, and have an contained angle between flat board and the swash plate, be connected with first commentaries on classics roller, second commentaries on classics roller between the swash plate, be connected with screw rod, uide pin and hinge between the flat board, first commentaries on classics roller and second commentaries on classics roller parcel respectively has first rubber roller and second rubber roller, first rubber roller diameter size is greater than second rubber roller diameter size.

Further, first rubber roller and the second rubber roller of arranging between the swash plate provide spacing and the fixed action to being located the directive wheel in the anchor clamps subassembly, and first rubber roller diameter is greater than the second rubber roller diameter in addition to the second rubber roller is fixed in between two lugs on the pterygoid lamina, has realized the matching to directive wheel arc profile.

Furthermore, second deviation prevention rollers are fixed on the upper surfaces of the two flat plates through shaft seats, the corner plate assembly comprises a first supporting plate and a second supporting plate, third deviation prevention rollers are fixed on two sides of the second supporting plate through the shaft seats, a first buffer block is fixed on the lower surface of the first supporting plate, and a second buffer block is fixed on the lower surface of the second supporting plate.

The first buffer block and the second buffer block are designed to realize the buffer effect when the first support plate and the second support plate contact the support surface when moving from the inclined position to the horizontal position.

The second deviation preventing roller and the first deviation preventing roller are used for avoiding the deviation phenomenon of the steering wheel in the rolling process on the clamp assembly, and the steering wheel can automatically return to the original position after being pressed to the first deviation preventing roller and the second deviation preventing roller even if the steering wheel deviates from the positive direction in the rolling process, so that the steering wheel cannot fall off from the clamp assembly.

Further, be connected with splint, two on screw rod and the uide pin the vertical fixed surface in splint one side has the block rubber, screw rod one end integrated into one piece has six arriss portion, and splint symmetrical arrangement has two, two in the anchor clamps subassembly splint pass through under the guide effect of screw rod rotary drive and uide pin, play the clamping action to the directive wheel that lies in on the anchor clamps subassembly, let directive wheel and anchor clamps subassembly rigid connection, further strengthened directive wheel steering corner data measurement's precision.

Furthermore, the design of hexagonal portion of screw tip can realize using pneumatic tool quick rotatory to it, and it is fixed to the tight clamp of directive wheel hub's clamp to let the faster completion of splint, and the fixed rubber block of splint upper end surface is then in order to increase splint and directive wheel hub's frictional force, has avoided the phenomenon that the directive wheel hub damage that hard joint caused warp simultaneously.

The steering wheel sensor comprises a shell and a sealing cover, the shell can be connected with the sealing cover in a matched mode, clamping jaws are arranged on the shell, the outer surface of the shell is of a cylindrical structure, a protruding portion is arranged at the bottom of the shell, a first shaft seat is integrally formed on the upper surface of the protruding portion, a bearing is installed in the first shaft seat, a second shaft seat is integrally formed in the center of the inner surface of the sealing cover, the bearing is also installed in the second shaft seat, and a central shaft is fixed between the shell and the sealing cover through the bearing.

The central shaft and the bearing are matched to ensure that the angle gauge arranged on the central shaft is always in a static state when the steering wheel rotates, so that the steering wheel steering angle is accurately and dynamically captured by the angle gauge, and the captured real-time data of the steering wheel corner is transmitted to the monitoring computer for operation and analysis.

The central shaft is provided with an angle gauge which is positioned in a cavity of the shell, and the steering wheel sensor is arranged in a through hole in the central part of the vehicle hub through a clamping jaw on the shell.

The steering wheel sensing comprises a rotary table and a support, the steering wheel sensor is fixed on a steering wheel of a vehicle through the support, the steering wheel sensor and the steering wheel sensor are both connected with a monitoring computer, the steering wheel sensor can capture the steering wheel angle and the required torque when the steering wheel is rotated in real time, data captured in real time are transmitted to the monitoring computer, and analysis and operation are carried out.

A working method of the vehicle steering performance testing system specifically comprises a steering system clearance test and a steering system transmission ratio test, and specifically comprises the following steps:

firstly, steering system clearance testing:

firstly, detecting a second supporting plate of an angle plate to ensure that the second supporting plate is in a horizontal position, and the second supporting plate is positioned in a rectangular groove of a base, so that a vehicle can drive in along the base, and wheels of the vehicle can be ensured to drive in along the central position of the base;

step two, after the vehicle steering wheel drives into the upper surface of the second supporting plate, the vehicle continues to drive forwards, the first supporting plate is pressed down on the upper end surface of the rotating shaft, the upper end surface of the rotating shaft provides support for the first supporting plate, at the moment, the vehicle stops moving forwards and parking brake is applied to the vehicle, and the steering wheel stops on the clamp assembly at the moment;

step three, placing the vehicle steering wheel in a centering manner, removing the vehicle steering wheel and a steering column decorative cover, then preliminarily fixing the input shaft loading assembly to the vehicle steering column, firmly connecting the quick adapting joint with the steering shaft of the vehicle, and then firmly fixing a first adjusting seat, a second adjusting seat and an L-shaped supporting seat in the input shaft loading assembly on the vehicle steering column;

fourthly, the electromagnetic brake works to brake the rotating shaft in the clamp assembly by operating the host; step five: the servo motor is controlled to input preset torque to the vehicle steering shaft by operating the host, the steering wheel is fixed, after the servo motor drives the steering shaft to rotate to a limit position, the torque value on the output shaft of the servo motor is larger than a preset numerical value in the host, the motor drives the steering shaft in a reverse rotation mode, after the steering shaft is driven in the reverse direction to the limit position, the torque value on the output shaft of the servo motor is larger than the preset numerical value in the host again, the servo motor rotates in the reverse direction to the positive direction and stops driving of the steering shaft;

repeating the previous operation step for multiple times, recording the clearance data of the vehicle steering shaft in the host, manually reading the clearance value data of the vehicle steering system captured in the host to compare with a standard value, and analyzing whether the clearance value of the vehicle steering system meets the standard or not;

secondly, testing the transmission ratio of the steering system:

firstly, mounting a steering wheel sensor inside a central through hole of a vehicle hub, and mounting a steering wheel sensor on a vehicle steering wheel;

step two, testing the vehicle on the road and keeping the speed constant, and capturing dynamic data of the transmission ratio between a steering wheel and a steering wheel of the vehicle in a detection computer at the moment;

changing the vehicle speed and keeping the vehicle speed constant, and capturing the transmission ratio data of the vehicle steering system again;

changing the speed of the vehicle, and repeating the previous operation for the third time to capture the transmission ratio data of the vehicle steering system;

and step five, through three groups of tests at different vehicle speeds, the monitoring computer records the dynamic data of the transmission ratio of the vehicle steering system at different vehicle speeds, manually reads the dynamic data of the transmission ratio of the vehicle steering system to compare with a standard value, and analyzes whether the data of the transmission ratio of the vehicle steering system meets the standard.

The invention has the beneficial effects that: the invention realizes the purposes that the clamp assembly applies load to the steering wheel and simulates the lateral force borne by the vehicle when the vehicle runs by matching the clamp assembly, the input shaft loading assembly and the host, can position the steering wheel through the electromagnetic brake within an allowed angle range, can input the driving torque calibrated in the host to the steering shaft of the vehicle steering system, captures the steering shaft data through the first corner sensor and the torque sensor, can realize the accurate measurement of the transmission clearance of the vehicle steering system, and can display the measurement in a chart form through the host.

The invention can also dynamically test the transmission ratio of the vehicle steering system through the steering wheel sensor, the steering wheel sensor and the monitoring computer, and obtains the dynamic data of the transmission ratio of the steering system through analyzing and calculating the data transmitted by the steering wheel sensor and the steering wheel sensor through the monitoring computer.

Drawings

In order to more clearly explain the technical solutions in the embodiments, the drawings in the embodiments will be briefly described below.

FIG. 1 is a perspective view of a testing platform according to the present invention.

FIG. 2 is a view of the relative positions of the clamp assembly and base of the present invention.

FIG. 3 is a front perspective view of the clamp assembly of the present invention.

Figure 4 is a rear perspective view of the clip assembly of the present invention.

FIG. 5 is a view showing a coupling structure of the rotary shaft and the base plate in the jig assembly according to the present invention.

FIG. 6 is an exploded view of a clamp assembly corner plate of the present invention.

Fig. 7 is an overall structural view of the input shaft loading assembly of the present invention.

FIG. 8 is an internal structural view of the input shaft loading assembly of the present invention.

Fig. 9 is a sectional view showing the internal structure of the steering wheel sensor according to the present invention.

Fig. 10 is a perspective view of a steering wheel sensing structure according to the present invention.

In the figure: 1. a test bench; 2. a host; 3. monitoring a computer; 4. an input shaft loading assembly; 5. a steering wheel sensor; 6. a steering wheel sensor; 7. a base; 8. a bevel; 9. a first anti-deviation roller; 10. a clamp assembly; 11. a first transverse plate; 12. a second transverse plate; 13. a rectangular groove; 14. a base plate; 15. a gusset; 16. an electromagnetic brake; 17. a rotating shaft; 18. a first angle sensor; 19. a support web; 20. a side plate assembly; 21. a hinge shaft; 22. an adjusting bracket; 23. a servo motor; 24. a first adjusting seat; 25. a second adjusting seat; 26. an L-shaped support seat; 27. a card sleeve; 28. a card holder; 29. a trapezoidal notch; 30. an adjustment groove; 31. a speed reducer; 33. a second angle sensor; 34. a torque sensor; 35. a support; 36. a chute; 37. an output shaft; 38. a quick-fit joint; 39. a wing plate; 40. a flat plate; 41. a sloping plate; 42. a first rotating roller; 43. a second rotating roller; 44. a screw; 45. a guide pin; 46. a first rubber roller; 47. a second rubber roller; 48. a lug; 49. a second anti-deviation roller; 50. a first support plate; 51. a second support plate; 52. a third prevention deviation roller; 53. a first buffer block; 54. a second buffer block; 55. a splint; 56. a rubber block; 57. a hexagonal section; 58. a housing; 59. a sealing cover; 60. a claw; 61. a first shaft seat; 62. a second shaft base; 63. a bearing; 64. a central shaft; 65. an angle gauge; 66. a turntable; 67. a support; 68. and a limiting plate.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. The detailed structure of the present invention will be apparent from the following detailed description of the structure with reference to fig. 1 to 10, and all the structural contents mentioned in the following embodiments are referred to in the accompanying drawings of the specification.

Example 1

As shown in fig. 1 to 10, the test system for the vehicle steering performance of the embodiment includes a test bench 1, a host 2, a monitoring computer 3, an input shaft loading assembly 4, a steering wheel sensor 5 and a steering wheel sensor 6, the test bench 1 includes bases 7, one end of each of the two bases 7 is provided with an inclined surface 8, the upper surfaces of the other ends of the two bases 7 are symmetrically provided with first anti-deviation rollers 9, the four first anti-deviation rollers 9 are fixed on the upper surfaces of the bases 7 through roller shaft seats, the other ends of the two bases 7 are provided with clamp assemblies 10, the two clamp assemblies 10 are connected through a first transverse plate 11, the two clamp assemblies 10 are respectively connected and positioned with the two bases 7 through limiting plates 68, the two bases 7 are positioned through a second transverse plate 12, the upper surface of one end, close to the clamp assembly 10, of the base 7 is provided with a rectangular groove 13, and the steering wheel sensor 5 and the steering wheel sensor 6 are both connected with the monitoring computer 3. Wherein the clamp assembly 10 further comprises a bottom plate 14 and an angle plate 15 assembly, an electromagnetic brake 16 is installed on the upper portion of the bottom plate 14, and a rotating shaft 17 is connected to the center of the electromagnetic brake 16.

Specifically, electromagnetic brake 16 chooses for use industry class magnetic powder formula electromagnetic brake can, and pivot 17 lower extreme passes through bearing 63 to be connected with bottom plate 14, and wherein the bearing that connects on the bottom plate 14 needs to guarantee to have good supporting effect and stability to pivot 17, just can guarantee the holistic stability of anchor clamps subassembly 10. The circumferential surface of the rotating shaft 17 is connected with a first angle sensor 18, the upper end of the rotating shaft 17 is fixed with a supporting web plate 19, the end parts of the two supporting web plates 19 are fixed with a side plate assembly 20, the side plate assembly 20 and the angle plate 15 assembly are hinged through a hinge shaft 21, and the electromagnetic brake 16 and the first angle sensor 18 are connected with the host machine 2.

More specifically, the rigidity of the hinge shaft 21 must ensure that the hinge shaft 21 does not bend when the steerable wheel is rolled onto the clamp assembly 10, and that the hinge shaft 21 provides a stable hinging effect to the base plate 14 and the corner plate 15.

The input shaft loading assembly 4 comprises an adjusting frame 22 and a servo motor 23, the adjusting frame 22 comprises a first adjusting seat 24, a second adjusting seat 25 and an L-shaped supporting seat 26, the first adjusting seat 24 comprises a clamping sleeve 27 and a clamping seat 28, the clamping sleeve 27 is sleeved on the L-shaped supporting seat 26 and fixed through bolt locking, the first adjusting seat 24 is fixedly connected with the clamping seat 28 through a bolt, and trapezoidal notches 29 are formed in the first adjusting seat 24 and the clamping seat 28. Specifically, the inner surface of the trapezoidal notch 29 is provided with anti-slip lines to ensure the clamping force of the first adjusting seat 24 and the clamping seat 28 on the vehicle steering column when the first adjusting seat is in bolted fit.

The surface symmetry of second regulation seat 25 is opened has adjustment tank 30, second regulation seat 25 passes adjustment tank 30 through the bolt and is fixed in "L" shape supporting seat 26 upper portion, second regulation seat 25 upper portion is fixed with reduction gear 31, reduction gear 31 passes through servo motor 23 drive, second angle sensor 33 and torque sensor 34 have been cup jointed on reduction gear 31 output shaft 37 circumference surface, angle sensor and torque sensor 34 are fixed through support 35, support 35 other end sliding connection is in the spout 36 of "L" shape supporting seat 26, be connected with quick adapter 38 at output shaft 37 lower extreme, servo motor 23, second angle sensor 33 and torque sensor 34 all are connected with host computer 2. Wherein, quick adaptation connects 38 top and output shaft 37 and need be equipped with the connecting device that can realize quick assembly disassembly, specifically is square adaptation and connects, can enough guarantee output shaft 37 and quick adaptation and connect 38 connectivity, can provide the drive power of required moment of torsion to the steering column input shaft through quick adaptation joint 38 through output shaft 37 again.

Specifically, the side plate assembly 20 includes symmetrically arranged wing plates 39, the two wing plates 39 include a flat plate 40 and a sloping plate 41, the flat plate 40 and the sloping plate 41 are integrally formed, and an included angle is formed between the flat plate 40 and the sloping plate 41, wherein the included angle between the flat plate 40 and the sloping plate 41 should not be too large or too small, and the included angle range should be 120 degrees to 130 degrees. A first roller 42 and a second roller 43 are connected between the inclined plates 41, and a screw 44, a guide pin 45 and a hinge shaft 21 are connected between the flat plates 40.

Specifically, the screw 44 is fixed axially and radially at the connecting portion between the screw 44 and the plate 40 in a non-threaded manner, so that the screw 44 is prevented from moving when rotating in the plate 40, and the screw 44 can be ensured to have an axial driving force to the clamp plate 55 threaded therewith after rotating.

More specifically, the clamping plates 55 at the two ends of the screw 44 are in a positive-negative relationship with the threaded manner of the screw 44, that is, the clamping plates 55 at the two ends of the screw 44 can move toward the center of the screw 44 along the screw 44 when the screw 44 rotates, so that the steering wheel hub between the two clamping plates 55 can be clamped by the two clamping plates 55.

First roller 42 and second roller 43 have wrapped up first rubber roller 46 and second rubber roller 47 respectively, first rubber roller 46 diameter size is greater than second rubber roller 47 diameter size, second roller 43 is fixed through the lug 48 that is located pterygoid lamina 39, two dull and stereotyped 40 upper surfaces are fixed with second anti-skew roller 49 through the axle bed, scute 15 subassembly includes first backup pad 50 and second backup pad 51, it is fixed with third anti-skew roller 52 through the axle bed to be fixed in second backup pad 51 both sides, first backup pad 50 lower fixed surface has first buffer 53, second backup pad 51 lower fixed surface has second buffer 54.

Specifically, the first deviation prevention roller 9, the second deviation prevention roller 49 and the third deviation prevention roller 52 are designed and installed so that the deviation prevention and correction effects on the steering wheel can be achieved only when the outer diameter profiles of the deviation prevention rollers are higher than the fixed surface.

More specifically, the screw 44 and the guide pin 45 are connected to a clamping plate 55, a rubber block 56 is fixed to one side surface of the upper ends of the two clamping plates 55, and a hexagonal portion 57 is integrally formed at one end of the screw 44.

The steering wheel sensor 5 comprises a shell 58 and a sealing cover 59, the shell 58 can be matched and connected with the sealing cover 59, a claw 60 is integrally formed on the shell 58, the outer surface of the shell 58 is of a cylindrical structure, a protruding portion is arranged at the bottom of the shell 58, a first shaft seat 61 is integrally formed on the upper surface of the protruding portion, a bearing 63 is installed in the first shaft seat 61, a second shaft seat 62 is integrally formed in the center position of the inner surface of the sealing cover 59, the bearing 63 is also installed in the second shaft seat 62, a central shaft 64 is fixed between the shell 58 and the sealing cover 59 through the bearing 63, an angle instrument 65 is installed on the central shaft 64 and is located in a cavity of the shell 58, and the steering wheel sensor 5 is fixed in a through hole in the center position of a vehicle hub through the claw 60 on the shell 58.

More specifically, in the case where the weight of the angle gauge 65 itself is light, a counter weight needs to be added, so that it can be ensured that the angle gauge 65 is always at the lowest point position and is stationary when the steered wheels are running.

The steering wheel sensor comprises a rotating disc 66 and a support 67, the steering wheel sensor 6 is fixed on a steering wheel of the vehicle through the support 67, and the steering wheel sensor 5 and the steering wheel sensor 6 are both connected with the monitoring computer 3.

More specifically, the steering wheel sensor 6 may use a domestic WZX-1 steering wheel parameter tester for measuring the steering angle of the steering wheel and the torque applied to turn the steering wheel, and transmit the captured data to a monitoring computer for data calculation and analysis.

Example 2

A working method of the vehicle steering performance testing system specifically comprises a steering system clearance test and a steering system transmission ratio test, and specifically comprises the following steps:

firstly, steering system clearance testing:

the method comprises the following steps: firstly, detecting the second supporting plate 51 of the angle plate 15 to ensure that the second supporting plate 51 is in a horizontal position, and the second supporting plate 51 is positioned in the rectangular groove 13 of the base 7, so that a vehicle can drive in along the base 7, and the wheels of the vehicle can be ensured to drive in along the central position of the base 7;

step two: when the vehicle steering wheel drives into the upper surface of the second support plate 51 and continues to drive forwards, the first support plate 50 is pressed down on the upper end surface of the rotating shaft 17, the upper end surface of the rotating shaft 17 provides support for the first support plate 50, the vehicle stops forwards and performs parking brake on the vehicle, and the steering wheel stops on the clamp assembly 10;

step three: the method comprises the following steps of placing a vehicle steering wheel in a centering manner, removing the vehicle steering wheel and a steering column decorative cover, primarily fixing an input shaft loading assembly 4 to the vehicle steering column, firmly connecting a quick adapting joint 38 with the steering shaft of the vehicle, and then firmly fixing a first adjusting seat 24, a second adjusting seat 25 and an L-shaped supporting seat 26 in the input shaft loading assembly 4 on the wheel steering column;

step four: the electromagnetic brake 16 works to brake the rotating shaft 17 in the clamp assembly 10 by operating the main machine 2; step five: the servo motor 23 is controlled to input preset torque to the vehicle steering shaft by operating the host machine 2, the steering wheel is fixed, after the servo motor 23 drives the steering shaft to rotate to a limit position, the torque value on the output shaft 37 of the servo motor 23 is larger than a preset value in the host machine 2, the motor drives in a reverse direction, after the steering shaft is driven in the reverse direction to the limit position, the torque value on the output shaft 37 of the servo motor 23 is larger than the preset value in the host machine 2 again, the servo motor 23 operates in the reverse direction to return to the positive direction, and the driving of the steering shaft is stopped;

step six: repeating the previous operation step for many times, recording the clearance data of the vehicle steering shaft in the host machine 2, comparing the clearance data of the vehicle steering system captured in the host machine 2 with a standard value through manual reading, and analyzing whether the clearance value of the vehicle steering system meets the standard or not.

Secondly, testing the transmission ratio of the steering system:

the method comprises the following steps: mounting a steering wheel sensor 5 inside a central through hole of a hub of the vehicle, and mounting a steering wheel sensor 6 on a steering wheel of the vehicle;

step two: the road test vehicle keeps the speed constant, and at the moment, dynamic data of the transmission ratio between a steering wheel and a steering wheel of the vehicle can be captured in a detection computer;

step three: changing the vehicle speed and keeping the vehicle speed constant, and capturing the transmission ratio data of the vehicle steering system again;

step four: changing the vehicle speed, and repeating the previous operation for the third time to capture the transmission ratio data of the vehicle steering system;

step five: through three tests at different speeds, the monitoring computer 3 records the dynamic data of the transmission ratio of the vehicle steering system at different speeds, manually reads the dynamic data of the transmission ratio of the vehicle steering system to compare with a standard value, and analyzes whether the data of the transmission ratio of the vehicle steering system meets the standard.

The transmission clearance detection and transmission ratio detection principles of the vehicle steering performance test system related to the embodiment are as follows:

firstly, a transmission clearance detection principle: after the clamp assembly 10 applies braking and fixing to a steering wheel through the electromagnetic brake 16, the input shaft loading assembly 4 provides driving force of torque calibrated in the main machine 2 for a steering shaft of the steering system, when the servo motor 23 runs to a limit position at one end and the driving force is greater than the driving force calibrated in the main machine 2, the servo motor 23 runs in a reverse rotation mode immediately, when the servo motor 23 runs in a reverse rotation mode to another limit position and the servo motor 23 runs in a reverse rotation mode again to an initial position after the driving force is greater than the driving force calibrated in the main machine 2, at the moment, the main machine 2 generates a curve graph of torque values changing with angles through data captured by the second rotation angle sensor 33 and the torque sensor 34 in the input shaft loading assembly 4, and a free clearance value and a transmission clearance value of the steering system can be read from the curve graph.

II, a transmission ratio testing principle: after the steering wheel sensor 5 and the steering wheel sensor 6 are respectively installed, a monitoring computer 3 is carried to test a vehicle, a rotating disc 66 of the steering wheel sensor 6 is driven at a certain speed, the corresponding rotating angle of a steering wheel is measured, the ratio of the rotating angle of an input shaft of the steering wheel to the rotating angle of the steering wheel is obtained through calculation, the ratio is the transmission ratio of a steering system, and after the data captured by the steering wheel sensor 5 and the steering wheel sensor 6 are captured by the monitoring computer 3, a corresponding dynamic road test curve graph can be generated at the end of the detecting computer 3.

The foregoing description is further illustrative of the present invention and is not to be construed as limiting thereof, the scope of which is defined in the appended claims, and the invention may be modified in any manner without departing from the essential structure thereof.