Electrically-driven steering system test board

Abstract

The invention belongs to the technical field of automobile steering system testing, and provides an electric drive steering system test board which comprises an installation platform. The steering fixing assembly comprises a steering column fixing module and a steering gear fixing module which are arranged on the mounting platform, and a first horizontal position adjusting piece is arranged between the steering column fixing module and the mounting platform; the steering input assembly comprises a first stand column, a second horizontal position adjusting piece is arranged between the first stand column and the mounting platform, and a steering input executing mechanism is arranged on the first stand column through a lifting piece; the two groups of load loading assemblies comprise loading boxes connected to the mounting platform in a sliding mode, electric drive deflection mechanisms are arranged in the loading boxes, mounting connectors are vertically connected to the output ends of the electric drive deflection mechanisms in a sliding mode, reciprocating vibration mechanisms are arranged in the loading boxes, and the reciprocating vibration mechanisms drive the mounting connectors to vertically vibrate in a reciprocating mode. The servo motor is used for driving test, the occupied area is reduced, daily maintenance is facilitated, and operation noise can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile steering system testing, and in particular relates to an electric drive steering system test bench. Background Art

[0002] With the development of society, cars have become the main means of transportation for people, and their safety and reliability have always been a focus of attention. As an important part of the car, the steering system plays a key role in the normal operation of the car.

[0003] The steering system test bench is used to simulate the actual working conditions of the automobile steering gear when the car is driving, so as to verify the transmission accuracy and fatigue durability of the automobile steering system. The steering system test bench plays a vital role in the research and development of automobile steering gears.

[0004] At present, the hydraulic drive test bench is widely used in the automotive steering system testing industry. It uses a hydraulic actuator to convert hydraulic energy into mechanical energy to test the automotive steering gear. However, there are many problems with the use of hydraulic test benches, such as large energy loss, high noise, the need to work with a hydraulic station, complex matching, large floor space, and the risk of hydraulic oil leakage during use, and the need for regular maintenance of the hydraulic system. Summary of the invention

[0005] The purpose of the present invention is to provide an electric drive steering system test bench to solve the above problems, so as to achieve the purpose of completely using servo motors for drive tests, reducing the floor space, facilitating daily maintenance, and reducing operating noise.

[0006] To achieve the above object, the present invention provides the following solution: an electric drive steering system test bench, comprising:

[0007] Installation platform;

[0008] A steering fixing assembly, comprising a steering column fixing module and a steering gear fixing module arranged on the mounting platform, wherein a first horizontal position adjusting member is arranged between the steering column fixing module and the mounting platform;

[0009] The steering input assembly comprises a first column, a second horizontal position adjusting member is arranged between the first column and the mounting platform, and a steering input actuator is arranged on the first column via a lifting member;

[0010] Two groups of load loading components are arranged on both sides of the steering gear fixing module, and the load loading components include a loading box slidably connected to the mounting platform, an electric drive deflection mechanism is arranged in the loading box, and the output end of the electric drive deflection mechanism is vertically slidably connected to the mounting joint, and a reciprocating vibration mechanism is also arranged in the loading box, and the reciprocating vibration mechanism is used to drive the mounting joint to perform vertical reciprocating vibration.

[0011] Preferably, the electrically driven deflection mechanism includes a spline shaft vertically rotatably connected to the loading box, one end of the spline shaft is drivingly connected to the first motor, a sleeve is slidably connected to the spline shaft via a spline, and the mounting joint is fixedly connected to the sleeve.

[0012] Preferably, the reciprocating vibration mechanism includes a ball screw vertically rotatably connected to the loading box, one end of the ball screw is transmission-connected to the second motor, the ball screw is transmission-connected to a screw sleeve, a connecting plate is fixedly connected to the screw sleeve, the connecting plate slides through the spline shaft on a side away from the screw sleeve, and the bottom of the connecting plate on a side away from the screw sleeve is rotationally connected to the top of the sliding sleeve.

[0013] Preferably, a bidirectional screw rod is rotatably connected to the mounting platform, and sliding blocks are fixedly connected to the bottoms of the two groups of loading boxes respectively. The two groups of sliding blocks are transmission-connected to the two ends of the bidirectional screw rod respectively. The bidirectional screw rod is used to adjust the distance between the two groups of loading boxes and the steering gear fixing module. One end of the bidirectional screw rod is transmission-connected to a first drive motor, and the first drive motor is fixedly connected to the mounting platform.

[0014] Preferably, the second horizontal position adjustment member includes a first slide plate slidably connected to the top of the mounting platform, the first slide plate slides horizontally along the length direction of the diverter, a first sliding drive member is arranged between the first slide plate and the mounting platform, a first mounting table surface is slidably connected to the first slide plate, the first mounting table surface slides horizontally in a direction perpendicular to the length direction of the diverter, a second sliding drive member is arranged between the first mounting table surface and the first slide plate, and the column is fixedly connected to the first mounting table surface.

[0015] Preferably, the steering input actuator includes a mounting seat horizontally rotatably connected to the lifting member, an input motor is hinged on the mounting seat, the output end of the input motor is transmission-connected to the steering wheel end of the steering system, and an angle adjustment member is provided between the input motor and the mounting seat.

[0016] Preferably, the first horizontal adjustment member includes a second slide plate slidably connected to the top of the mounting platform, the second slide plate slides horizontally along the length direction of the steering gear, a third sliding drive member is arranged between the second slide plate and the mounting platform, a second mounting table surface is slidably connected to the second slide plate, the second mounting table surface slides horizontally in a direction perpendicular to the length direction of the steering gear, a fourth sliding drive member is arranged between the second mounting table surface and the second slide plate, and the steering column fixing module is arranged on the second mounting table surface.

[0017] Preferably, the steering column fixing module includes a second column vertically fixedly connected to the second mounting table, a bearing seat is slidably connected to the second column, a first fixing box is horizontally rotatably connected to the bearing seat, the first fixing box is used to fix the steering column, and an adjusting drive member is arranged between the first fixing box and the second column.

[0018] Preferably, the steering gear fixing module includes a second fixing box, which is vertically slidably connected to the mounting platform, and the second fixing box is located between the two loading boxes. A height adjustment member is provided between the second fixing box and the mounting platform, and the height adjustment member is used to adjust the height between the steering gear and the mounting joint. A fixing clamp is provided in the second fixing box, and the fixing clamp is used to fix the steering gear in the second fixing box.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects: the main function of the steering column fixing module is to fix the steering column of the steering system; the main function of the steering gear fixing module is to fix the steering gear of the steering system; the main function of the first horizontal adjustment member is to adjust the position of the steering column fixing module on the mounting platform to adapt to steering systems of different sizes and structures; the main function of the mounting joint is to connect the end of the steering gear tie rod; the main function of the electric drive deflection mechanism is to provide a certain resistance for the generation of the steering gear tie rod; the main function of the reciprocating vibration mechanism is to drive the mounting joint to move up and down, simulating the influence of the tire's bouncing on the steering system during the experiment. On the whole, the present invention uses a rotary servo motor to drive the steering system to test the steering system. Compared with the traditional hydraulic drive test bench, it is more efficient, simple to match, can work by connecting the cable, occupies a smaller area, and is simple to maintain daily, saving a lot of manpower and material resources, and has low operating noise, which can create a relatively quiet test environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a test bench of the present invention;

[0022] Figure 2 A schematic diagram of a load loading assembly of the present invention;

[0023] Figure 3 is a schematic diagram of a steering input assembly of the present invention;

[0024] Figure 4 is a schematic diagram of a steering column fixing module of the present invention;

[0025] Figure 5 It is a schematic diagram of a steering gear fixing module of the present invention;

[0026] Figure 6 is a schematic diagram of a height adjustment member of the present invention;

[0027] Among them, 1. mounting platform; 2. first column; 3. loading box; 4. mounting joint; 5. spline shaft; 6. first motor; 7. sleeve; 8. ball screw; 9. second motor; 10. screw sleeve; 11. connecting plate; 12. bidirectional screw; 13. sliding block; 14. first drive motor; 15. first slide plate; 16. first mounting table; 17. mounting seat; 18. input motor; 19. second slide plate; 20. second mounting table; 21. second column ; 22. Bearing seat; 23. First fixed box; 24. Second fixed box; 25. Fixing fixture; 26. Fixing plate; 27. Observation window; 28. Second drive motor; 29. ​​First screw rod; 30. Third drive motor; 31. Second screw rod; 32. Lifting platform; 33. Third screw rod; 34. Fourth drive motor; 35. Mounting table; 36. Crank handle; 37. Third slide plate; 38. Grip; 39. Fifth drive motor; 40. Transfer case; 41. Telescopic rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-Figure 6 The present invention provides an electric drive steering system test bench, comprising:

[0031] Installation platform 1;

[0032] A steering fixing assembly, comprising a steering column fixing module and a steering gear fixing module arranged on the mounting platform 1, wherein a first horizontal position adjusting member is arranged between the steering column fixing module and the mounting platform 1;

[0033] The steering input assembly comprises a first column 2, a second horizontal position adjusting member is arranged between the first column 2 and the mounting platform 1, and a steering input actuator is arranged on the first column 2 via a lifting member;

[0034] Two groups of load loading components are arranged on both sides of the steering gear fixing module. The load loading components include a loading box 3 slidably connected to the mounting platform 1. An electric drive deflection mechanism is arranged in the loading box 3. The output end of the electric drive deflection mechanism is vertically slidably connected to the mounting joint 4. A reciprocating vibration mechanism is also arranged in the loading box 3. The reciprocating vibration mechanism is used to drive the mounting joint 4 to perform vertical reciprocating vibration.

[0035] The main function of the steering column fixing module is to fix the steering column of the steering system; the main function of the steering gear fixing module is to fix the steering gear of the steering system; the main function of the first horizontal adjustment member is to adjust the position of the steering column fixing module on the mounting platform 1 to adapt to steering systems of different sizes and structures; the main function of the mounting joint 4 is to connect the end of the steering gear tie rod; the main function of the electric drive deflection mechanism is to provide a certain resistance for the generation of the steering gear tie rod; the main function of the reciprocating vibration mechanism is to drive the mounting joint 4 to move up and down, simulating the impact of the tire's bouncing on the steering system during the experiment. On the whole, the present invention uses a rotary servo motor to drive the steering system to test the steering system. Compared with the traditional hydraulic drive test bench, it is more efficient, simple to match, can work by connecting the cable, occupies a smaller area, and is simple to maintain daily, saving a lot of manpower and material resources, and has low operating noise, which can create a quieter test environment.

[0036] A further optimized solution is that the electrically driven deflection mechanism includes a spline shaft 5 vertically rotatably connected to the loading box 3, one end of the spline shaft 5 is transmission-connected to a first motor 6, a sleeve 7 is slidingly connected to the spline shaft 5 via a spline, and the mounting joint 4 is fixedly connected to the sleeve 7.

[0037] like Figure 2As shown, the first motor 6 is a servo motor. During the test, the first motor 6 rotates a certain angle, drives the mounting joint 4 to rotate a corresponding angle through the spline shaft 5, and transmits power to the steering gear through the pull rod of the steering system.

[0038] A further optimized solution is that the reciprocating vibration mechanism includes a ball screw 8 that is vertically rotatably connected to the loading box 3, one end of the ball screw 8 is transmission-connected to the second motor 9, the ball screw 8 is transmission-connected to the screw sleeve 10, the screw sleeve 10 is fixedly connected to a connecting plate 11, the side of the connecting plate 11 away from the screw sleeve 10 slides through the spline shaft 5, and the bottom of the side of the connecting plate 11 away from the screw sleeve 10 is rotationally connected to the top of the sliding sleeve 7.

[0039] like Figure 2 As shown, the second motor 9 is controlled to rotate forward and reverse within a certain angle range, thereby driving the ball screw 8 to rotate back and forth, and then driving the screw sleeve 10 to move up and down in the vertical direction. When the screw sleeve 10 moves back and forth, it will drive the sliding sleeve 7 to move up and down through the connecting plate 11, thereby driving the mounting joint 4 to reciprocate, achieving the effect of simulating road bumps on the steering gear.

[0040] Further optimization scheme, such as Figure 2 As shown, the upper and lower inner parts of the loading box 3 are respectively fixedly connected with fixed plates 26, and the spline shaft 5 and the ball screw 8 are respectively rotatably connected between the two sets of fixed plates 26. The first motor 6 is drivingly connected to the spline shaft 5 through a coupling.

[0041] According to a further optimized solution, an arrow is provided on the connecting plate 11 and a scale is engraved on the side wall of the sliding sleeve 7. The deflection angle of the sliding sleeve 7 can be recorded by the arrow and the scale.

[0042] To further optimize the solution, an observation window 27 is provided on the side wall of the loading box 3 , through which the experimenter can conveniently observe the working conditions inside the loading box 3 .

[0043] A further optimized solution is that a bidirectional screw rod 12 is rotatably connected to the mounting platform 1, and sliding blocks 13 are fixedly connected to the bottoms of the two groups of loading boxes 3 respectively. The two groups of sliding blocks 13 are transmission-connected to the two ends of the bidirectional screw rod 12 respectively. The bidirectional screw rod 12 is used to adjust the distance between the two groups of loading boxes 3 and the steering gear fixing module. One end of the bidirectional screw rod 12 is transmission-connected to the first drive motor 14, and the first drive motor 14 is fixedly connected to the mounting platform 1.

[0044] like Figure 2As shown, the mounting platform 1 is provided with a slideway for the loading boxes 3 to slide. When the two loading boxes 3 need to be brought close to the steering gear fixing module, the first drive motor 14 is controlled to rotate, and the rotation of the first drive motor 14 drives the bidirectional screw rod 12 to rotate, and the two groups of loading boxes 3 are driven to move closer to the middle at the same time through the bidirectional screw rod 12. The first drive motor 14 is controlled to reverse, so that the distance between the two loading boxes 3 can be increased.

[0045] A further optimized solution is that the second horizontal position adjustment member includes a first slide plate 15 slidably connected to the top of the mounting platform 1, the first slide plate 15 slides horizontally along the length direction of the steering gear, a first sliding drive member is arranged between the first slide plate 15 and the mounting platform 1, a first mounting table surface 16 is slidably connected to the first slide plate 15, the first mounting table surface 16 slides horizontally in a direction perpendicular to the length direction of the steering gear, a second sliding drive member is arranged between the first mounting table surface 16 and the first slide plate 15, and the first column 2 is fixedly connected to the first mounting table surface 16.

[0046] like Figure 3 As shown, the first sliding drive member includes a second driving motor 28 fixedly connected to the mounting platform 1, and the output shaft of the second driving motor 28 is drivingly connected to the first screw rod 29, and the first screw rod 29 is drivingly connected to the first slide plate 15. The second driving motor 28 drives the first screw rod 29 to rotate, so that the first slide plate 15 can be moved left and right.

[0047] The second sliding drive member includes a third driving motor 30 fixedly connected to the first slide plate 15, the output shaft of the third driving motor 30 is drivingly connected to the second screw rod 31, and the second screw rod 31 is drivingly connected to the first mounting table 16. The third driving motor 30 drives the second screw rod 31 to rotate, so that the first mounting table 16 can be moved forward and backward.

[0048] A further optimized solution is that the steering input actuator includes a mounting base 17 horizontally rotatably connected to the lifting member, an input motor 18 is hinged on the mounting base 17, the output end of the input motor 18 is transmission-connected to the steering wheel end of the steering system, and an angle adjustment member is provided between the input motor 18 and the mounting base 17.

[0049] In a further optimized solution, the lifting member includes a lifting platform 32 slidably sleeved on the first column 2 and a third screw rod 33 vertically rotatably connected to the side wall of the first column 2, and a fourth drive motor 34 is arranged between the third screw rod 33 and the first mounting table 16. The third screw rod 33 is driven to rotate by the fourth drive motor 34, and when the third screw rod 33 rotates, the lifting platform 32 can be lifted up through the thread transmission, and the lifting platform 32 can be controlled to descend by controlling the fourth drive motor 34 to reverse.

[0050] The mounting seat 17 is hinged with a mounting table 35, and the input motor 18 is fixedly connected to the mounting table 35. Figure 3 As shown, the angle adjustment member can be an electric telescopic cylinder, a jack or other equipment to achieve the angle adjustment between the mounting table 35 and the mounting seat 17.

[0051] A further optimized solution is that the first horizontal adjustment member includes a second slide plate 19 slidably connected to the top of the mounting platform 1, the second slide plate 19 slides horizontally along the length direction of the steering gear, a third sliding drive member is arranged between the second slide plate 19 and the mounting platform 1, a second mounting table 20 is slidably connected to the second slide plate 19, the second mounting table 20 slides horizontally in a direction perpendicular to the length direction of the steering gear, a fourth sliding drive member is arranged between the second mounting table 20 and the second slide plate 19, and the steering column fixing module is arranged on the second mounting table 20.

[0052] like Figure 4 As shown, the third sliding driving member has the same structure as the first sliding driving member, and the second sliding plate 19 is moved left and right by driving the lead screw to rotate through the driving motor.

[0053] The fourth sliding driving member has the same structure as the second sliding driving member, and drives the screw on the second slide plate 19 to rotate through the driving motor, so as to realize the forward and backward movement of the second mounting table 20 .

[0054] A further optimized solution is that the steering column fixing module includes a second column 21 vertically fixedly connected to the second mounting table 20, a bearing seat 22 is slidably connected to the second column 21, a first fixed box 23 is horizontally rotatably connected to the bearing seat 22, the first fixed box 23 is used to fix the steering column, and an adjusting drive member is arranged between the first fixed box 23 and the bearing seat 22.

[0055] As a further optimization scheme, a second lifting member is provided between the bearing seat 22 and the second column 21 . The second lifting member has the same structure as the lifting member, and both of them drive the screw rod to rotate through a driving motor, thereby achieving height adjustment of the bearing seat 22 on the second column 21 .

[0056] like Figure 4 As shown, the adjusting drive member includes a rotating shaft (not shown in the figure) horizontally connected to the supporting seat 22, one end of the rotating shaft is fixedly connected to the first fixed box 23, and a crank 36 is rotatably connected to the supporting seat 22, and the rotating shaft of the crank 36 is connected to the rotating shaft through a worm gear transmission.

[0057] Before the experiment, the steering column is fixedly connected to the first fixing box 23 by bolts and clamps, and then the crank 36 is shaken to adjust the angle of the steering column by rotating the first fixing box 23 around the rotation axis.

[0058] A further optimized solution is that the steering gear fixing module includes a second fixing box 24, which is vertically slidably connected to the mounting platform 1, and the second fixing box 24 is located between the two loading boxes 3. A height adjustment member is provided between the second fixing box 24 and the mounting platform 1, and the height adjustment member is used to adjust the height between the steering gear and the mounting joint 4. A fixing clamp 25 is provided in the second fixing box 24, and the fixing clamp 25 is used to fix the steering gear in the second fixing box 24.

[0059] like Figure 5 As shown, the steering gear is fixedly connected in the second fixing box 24 by the fixing fixture 25. Two opposite side walls of the second fixing box 24 are respectively provided with openings to facilitate the steering tie rod to pass through and be hinged with the mounting joint 4.

[0060] In a further optimized solution, a third slide plate 37 is slidably connected to the mounting platform 1 along the front-to-back direction, and a front-to-back position adjustment member is provided between the third slide plate 37 and the mounting platform 1. The front-to-back position adjustment member is similar in structure to the second sliding drive member, but the difference is that the front-to-back position adjustment member drives the screw rod to rotate by manually shaking the handle 38, thereby adjusting the front-to-back position of the third slide plate 37, thereby adjusting the front-to-back position of the second fixed box 24. The height adjustment member is provided between the third slide plate 37 and the bottom of the second fixed box 24.

[0061] In a further optimized solution, the height adjustment member includes a fifth drive motor 39 fixedly connected to the third slide plate 37, and the output shaft of the fifth drive motor 39 is drivingly connected to the transfer case 40. It also includes two sets of telescopic rods 41 fixedly connected to the third slide plate 37, and the two sets of telescopic rods 41 are respectively drivingly connected to the output ends of the transfer case 40. The telescopic rods 41 can be driven by a screw rod to achieve the telescopic action of the telescopic rods 41, thereby driving the second fixed box 24 to adjust the height.

[0062] The working process of this embodiment is as follows: open the second fixed box 24, fix the steering gear of the steering system on the fixing fixture 25, then install the steering column in the first fixed box 23, adjust the horizontal position of the first fixed box 23 by moving the second slide plate 19 and the second mounting table 20, then adjust the height of the bearing seat 22 and the angle of the first fixed box 23 by the crank 36, so that the steering column of the steering system and the steering gear can be smoothly connected, then adjust the horizontal position of the lifting platform 32 by adjusting the position of the first slide plate 15 and the first mounting table 16, and make the input motor 18 and the steering column transmission connection by adjusting the height of the lifting platform 32 and the angle of the mounting table 35. Finally, by adjusting the distance between the two loading boxes 3, the steering rod can be smoothly connected with the mounting joint 4. During the experiment, the first motor 6 and the second motor 9 are used to load the left and right wheel fixed ends and the left and right wheel fixed ends are subjected to up and down vibration loading, and the input motor 18 is used to rotate the input end of the steering wheel to realize the five-axis loading experiment of the automobile steering system specimen, which more realistically simulates the working condition of the automobile steering system.

[0063] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An electric drive steering system test bench, characterized in that ,include: Mounting platform (1); A steering fixing assembly, comprising a steering column fixing module and a steering gear fixing module arranged on the mounting platform (1), wherein a first horizontal position adjusting member is arranged between the steering column fixing module and the mounting platform (1); A steering input assembly comprises a first column (2), a second horizontal position adjustment member is arranged between the first column (2) and the mounting platform (1), and a steering input actuator is arranged on the first column (2) via a lifting member; Two groups of load loading components are arranged on both sides of the steering gear fixing module, and the load loading components include a loading box (3) slidably connected to the mounting platform (1), an electrically driven deflection mechanism is arranged in the loading box (3), and the output end of the electrically driven deflection mechanism is vertically slidably connected to the mounting joint (4), and a reciprocating vibration mechanism is also arranged in the loading box (3), and the reciprocating vibration mechanism is used to drive the mounting joint (4) to perform vertical reciprocating vibration.

2. The electric drive steering system test bench according to claim 1, characterized in that: The electrically driven deflection mechanism comprises a spline shaft (5) vertically rotatably connected to the loading box (3); one end of the spline shaft (5) is drivingly connected to a first motor (6); a sleeve (7) is slidably connected to the spline shaft (5) via a spline; and the mounting joint (4) is fixedly connected to the sleeve (7).

3. The electric drive steering system test bench according to claim 2, characterized in that: The reciprocating vibration mechanism comprises a ball screw (8) vertically rotatably connected to the loading box (3); one end of the ball screw (8) is transmission-connected to a second motor (9); the ball screw (8) is transmission-connected to a screw sleeve (10); a connecting plate (11) is fixedly connected to the screw sleeve (10); a side of the connecting plate (11) away from the screw sleeve (10) slides through the spline shaft (5); and a bottom side of the connecting plate (11) away from the screw sleeve (10) is rotationally connected to the top of the sliding sleeve (7).

4. The electric drive steering system test bench according to claim 1, characterized in that: A bidirectional screw rod (12) is rotatably connected to the mounting platform (1); sliding blocks (13) are fixedly connected to the bottoms of the two groups of loading boxes (3); the two groups of sliding blocks (13) are respectively transmission-connected to the two ends of the bidirectional screw rod (12); the bidirectional screw rod (12) is used to adjust the distance between the two groups of loading boxes (3) and the steering gear fixing module; one end of the bidirectional screw rod (12) is transmission-connected to a first drive motor (14); the first drive motor (14) is fixedly connected to the mounting platform (1).

5. The electric drive steering system test bench according to claim 1, characterized in that: The second horizontal position adjustment member comprises a first slide plate (15) slidably connected to the top of the mounting platform (1), the first slide plate (15) slides horizontally along the length direction of the steering gear, a first sliding drive member is arranged between the first slide plate (15) and the mounting platform (1), a first mounting table surface (16) is slidably connected to the first slide plate (15), the first mounting table surface (16) slides horizontally along a direction perpendicular to the length direction of the steering gear, a second sliding drive member is arranged between the first mounting table surface (16) and the first slide plate (15), and the column (2) is fixedly connected to the first mounting table surface (16).

6. The electric drive steering system test bench according to claim 5, characterized in that: The steering input actuator comprises a mounting seat (17) horizontally rotatably connected to the lifting member, an input motor (18) is hingedly connected to the mounting seat (17), an output end of the input motor (18) is transmission-connected to a steering wheel end of a steering system, and an angle adjustment member is provided between the input motor (18) and the mounting seat (17).

7. The electric drive steering system test bench according to claim 1, characterized in that: The first horizontal position adjustment member comprises a second slide plate (19) slidably connected to the top of the mounting platform (1), the second slide plate (19) slides horizontally along the length direction of the steering gear, a third sliding drive member is arranged between the second slide plate (19) and the mounting platform (1), a second mounting table surface (20) is slidably connected to the second slide plate (19), the second mounting table surface (20) slides horizontally along a direction perpendicular to the length direction of the steering gear, a fourth sliding drive member is arranged between the second mounting table surface (20) and the second slide plate (19), and the steering column fixing module is arranged on the second mounting table surface (20).

8. The electric drive steering system test bench according to claim 7, characterized in that: The steering column fixing module comprises a second column (21) vertically fixedly connected to the second mounting table (20); a bearing seat (22) is slidably connected to the second column (21); a first fixing box (23) is horizontally rotatably connected to the bearing seat (22); the first fixing box (23) is used for fixing the steering column; an adjusting drive member is arranged between the first fixing box (23) and the second column (21).

9. The electric drive steering system test bench according to claim 2, characterized in that: The steering gear fixing module comprises a second fixing box (24), the second fixing box (24) is vertically slidably connected to the mounting platform (1), and the second fixing box (24) is located between the two loading boxes (3), a height adjustment member is provided between the second fixing box (24) and the mounting platform (1), and the height adjustment member is used to adjust the height between the steering gear and the mounting joint (4), and a fixing fixture (25) is provided in the second fixing box (24), and the fixing fixture (25) is used to fix the steering gear in the second fixing box (24).

Images