An electric power steering system test bench

Abstract

The present invention belongs to the technical field of automotive steering system testing, and provides an electric power steering system test bench, which includes an installation platform; a steering fixing component, including a steering column fixing module and a steering gear fixing module arranged on the installation platform, and a first horizontal position adjusting member is arranged between the steering column fixing module and the installation platform; a steering input component, including a first column, a second horizontal position adjusting member is arranged between the first column and the installation platform, and a steering input execution mechanism is arranged on the first column through a lifting member; two groups of load loading components, including a loading box slidably connected to the installation platform, an electric drive deflection mechanism is arranged in the loading box, an installation joint is vertically slidably connected to the output end of the electric drive deflection mechanism, a reciprocating vibration mechanism is arranged in the loading box, and the reciprocating vibration mechanism drives the installation joint to reciprocate vertically. The present invention uses a servo motor for driving tests, reduces the floor area, is conducive to daily maintenance, and can reduce the running noise.

Description

Technical Field

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

[0002] With the development of society, automobiles have become the main means of transportation for people to travel, and their safety and reliability have always been highly concerned. As an important part of automobiles, the steering system plays a crucial role in the normal operation of automobiles.

[0003] The steering system test bench is used to simulate the real working conditions of the automotive steering gear during vehicle driving, so as to verify the transmission accuracy and fatigue durability of the automotive steering system. The steering system test bench plays a crucial role in the research and development process of automotive steering gears.

[0004] Currently in the automotive steering system testing industry, hydraulic drive test benches are commonly used. It uses a hydraulic actuator to convert hydraulic energy into mechanical energy to test the automotive steering gear. However, there are many problems in the use of hydraulic test benches, such as large energy loss, high noise, the need to work with a hydraulic station, complex supporting facilities, large floor space, and the risk of hydraulic oil leakage during use, and the need to regularly maintain the hydraulic system, etc. 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, achieving the purpose of fully using servo motors for driving tests, reducing the floor space, facilitating daily maintenance, and reducing the operating noise.

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

[0007] An installation platform;

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

[0009] A steering input assembly, including a first column, a second horizontal position adjusting member is arranged between the first column and the installation platform, and a steering input actuator is arranged on the first column through a lifting member;

[0010] Two sets of load loading components, and the two sets of load loading components are arranged on both sides of the steering gear fixing module. The load loading component includes a loading box slidably connected to the installation platform. An electric drive deflection mechanism is arranged in the loading box. The output end of the electric drive deflection mechanism is vertically slidably connected with a mounting joint. 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 electric drive deflection mechanism includes a spline shaft vertically rotatably connected in the loading box. One end of the spline shaft is drivingly connected with a first motor. A sliding sleeve is slidably connected to the spline shaft through splines. The mounting joint is fixedly connected to the sliding 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 drivingly connected with a second motor. A screw sleeve is drivingly connected to the ball screw. A connecting plate is fixedly connected to the screw sleeve. The side of the connecting plate away from the screw sleeve slidably penetrates through the spline shaft, and the bottom of the side of the connecting plate away from the screw sleeve is rotatably connected to the top of the sliding sleeve.

[0013] Preferably, a bidirectional screw is rotatably connected to the installation platform. The bottoms of the two loading boxes are respectively fixedly connected with sliding blocks. The two sliding blocks are respectively drivingly connected to both ends of the bidirectional screw. The bidirectional screw is used to adjust the distance between the two loading boxes and the steering gear fixing module. One end of the bidirectional screw is drivingly connected with a first driving motor, and the first driving motor is fixedly connected to the installation platform.

[0014] Preferably, the second horizontal position adjusting member includes a first sliding plate slidably connected to the top of the installation platform. The first sliding plate horizontally slides along the length direction of the steering gear. A first sliding drive member is arranged between the first sliding plate and the installation platform. A first installation tabletop is slidably connected to the first sliding plate. The first installation tabletop horizontally slides along a direction perpendicular to the length direction of the steering gear. A second sliding drive member is arranged between the first installation tabletop and the first sliding plate. The column is fixedly connected to the first installation tabletop.

[0015] Preferably, the steering input execution mechanism includes a mounting seat horizontally rotatably connected to the lifting member. An input motor is hinged to the mounting seat. The output end of the input motor is drivingly connected to the steering wheel end of the steering system. An angle adjusting member is arranged 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] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the test bench of the present invention;

[0022] Figure 2 Schematic diagram of the load loading component of the present invention;

[0023] Figure 3 Schematic diagram of the steering input component of the present invention;

[0024] Figure 4 Schematic diagram of the steering column fixing module of the present invention;

[0025] Figure 5 Schematic diagram of the steering gear fixing module of the present invention;

[0026] Figure 6 Schematic diagram of the height adjusting member of the present invention;

[0027] Among them, 1. Installation platform; 2. First column; 3. Loading box; 4. Installation joint; 5. Spline shaft; 6. First motor; 7. Sliding sleeve; 8. Ball screw; 9. Second motor; 10. Screw sleeve; 11. Connecting plate; 12. Bi-directional screw; 13. Sliding block; 14. First driving motor; 15. First sliding plate; 16. First installation tabletop; 17. Installation seat; 18. Input motor; 19. Second sliding plate; 20. Second installation tabletop; 21. Second column; 22. Bearing seat; 23. First fixed box; 24. Second fixed box; 25. Fixed fixture; 26. Fixed plate; 27. Observation window; 28. Second driving motor; 29. First screw; 30. Third driving motor; 31. Second screw; 32. Lifting platform; 33. Third screw; 34. Fourth driving motor; 35. Installation tabletop; 36. Crank; 37. Third sliding plate; 38. Handle; 39. Fifth driving motor; 40. Transfer case; 41. Telescopic rod. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall 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 Figures 1-6 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 by a certain angle, drives the mounting joint 4 to rotate by a corresponding angle through the spline shaft 5, and transmits the power to the steering gear through the tie rod of the steering system.

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

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

[0040] In a further optimized solution, as Figure 2 shown, upper and lower inner sides of the loading box 3 are respectively fixedly connected with fixing plates 26. The spline shaft 5 and the ball screw 8 are respectively rotatably connected between the two groups of fixing plates 26. The first motor 6 is drivingly connected to the spline shaft 5 through a coupling.

[0041] In 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 through the arrow and the scale.

[0042] In a further optimized solution, an observation window 27 is provided on the side wall of the loading box 3, and through the observation window 27, experimental personnel can conveniently observe the working conditions inside the loading box 3.

[0043] In a further optimized solution, a bidirectional screw 12 is rotatably connected to the mounting platform 1. Bottoms of the two groups of loading boxes 3 are respectively fixedly connected with sliding blocks 13. The two groups of sliding blocks 13 are respectively drivingly connected to both ends of the bidirectional screw 12. The bidirectional screw 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 12 is drivingly connected to a first driving motor 14, and the first driving motor 14 is fixedly connected to the mounting platform 1.

[0044] As Figure 2As shown, a chute for the sliding of the loading box 3 is provided on the installation platform 1. When it is necessary to move the two loading boxes 3 close to the steering gear fixing module, control the first driving motor 14 to rotate. The rotation of the first driving motor 14 drives the bidirectional lead screw 12 to rotate, and drives the two groups of loading boxes 3 to move closer to the middle simultaneously through the bidirectional lead screw 12. Control the first driving motor 14 to reverse, and the distance between the two loading boxes 3 can be increased.

[0045] For a further optimized solution, the second horizontal position adjusting member includes a first sliding plate 15 slidably connected to the top of the installation platform 1. The first sliding plate 15 slides horizontally along the length direction of the steering gear. A first sliding drive member is provided between the first sliding plate 15 and the installation platform 1. A first installation table 16 is slidably connected to the first sliding plate 15. The first installation table 16 slides horizontally along a direction perpendicular to the length direction of the steering gear. A second sliding drive member is provided between the first installation table 16 and the first sliding plate 15. The first column 2 is fixedly connected to the first installation table 16.

[0046] As Figure 3 shown, the first sliding drive member includes a second driving motor 28 fixedly connected to the installation platform 1. The output shaft of the second driving motor 28 is drivingly connected to a first lead screw 29, and the first lead screw 29 is drivingly connected to the first sliding plate 15. By driving the first lead screw 29 to rotate through the second driving motor 28, the left - right movement of the first sliding plate 15 can be realized.

[0047] The second sliding drive member includes a third driving motor 30 fixedly connected to the first sliding plate 15. The output shaft of the third driving motor 30 is drivingly connected to a second lead screw 31, and the second lead screw 31 is drivingly connected to the first installation table 16. By driving the second lead screw 31 to rotate through the third driving motor 30, the front - rear movement of the first installation table 16 can be realized.

[0048] For a further optimized solution, the steering input actuator includes a mounting seat 17 horizontally rotatably connected to the lifting member. An input motor 18 is hinged to the mounting seat 17. The output end of the input motor 18 is drivingly connected to the steering wheel end of the steering system. An angle adjusting member is provided between the input motor 18 and the mounting seat 17.

[0049] For a further optimized solution, the lifting member includes a lifting platform 32 slidably sleeved on the first column 2 and a third lead screw 33 vertically rotatably connected to the side wall of the first column 2. A fourth driving motor 34 is provided between the third lead screw 33 and the first installation table 16. By driving the third lead screw 33 to rotate through the fourth driving motor 34, the lifting platform 32 can be lifted by screw drive when the third lead screw 33 rotates. Control the fourth driving motor 34 to reverse, and the lowering of the lifting platform 32 can be controlled.

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

[0051] In a further optimized solution, the first horizontal adjustment member includes a second slide plate 19 slidably connected to the top of the installation 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 installation platform 1. A second installation table 20 is slidably connected to the second slide plate 19. The second installation table 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 installation table 20 and the second slide plate 19. The steering column fixing module is arranged on the second installation table 20.

[0052] As Figure 4 shown, the third sliding drive member has the same structure as the first sliding drive member. By driving the screw rod to rotate with a driving motor, the left and right movement of the second slide plate 19 is achieved.

[0053] The fourth sliding drive member has the same structure as the second sliding drive member. By driving the screw rod on the second slide plate 19 to rotate with a driving motor, the front and back movement of the second installation table 20 is achieved.

[0054] In a further optimized solution, the steering column fixing module includes a second column 21 vertically and fixedly connected to the second installation 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 fixedly connecting the steering column. An adjustment drive member is arranged between the first fixing box 23 and the bearing seat 22.

[0055] In a further optimized solution, a second lifting member is arranged between the bearing seat 22 and the second column 21. The second lifting member has the same structure as the lifting member, and both are driven by a driving motor to drive the screw rod to rotate, so as to realize the height adjustment of the bearing seat 22 on the second column 21.

[0056] As Figure 4 shown, the adjustment drive member includes a rotating shaft (not shown in the figure) horizontally and rotatably connected in the bearing seat 22. One end of the rotating shaft is fixedly connected to the first fixing box 23. A crank 36 is rotatably connected to the bearing seat 22. The rotating shaft of the crank 36 is connected to the rotating shaft through a worm and worm gear transmission.

[0057] Before the experiment, the steering column is fixedly connected to the first fixing box 23 through bolts and clamps. Then, turn the crank 36 to adjust the angle of the steering column by rotating the first fixing box 23 around the rotating shaft.

[0058] For a further optimized solution, the steering gear fixing module includes a second fixing box 24. The second fixing box 24 is vertically slidably connected to the installation platform 1, and the second fixing box 24 is located between the two loading boxes 3. A height adjusting member is provided between the second fixing box 24 and the installation platform 1. The height adjusting member is used to adjust the height between the steering gear and the installation joint 4. A fixing clamp 25 is provided inside the second fixing box 24. The fixing clamp 25 is used to fixedly connect the steering gear inside the second fixing box 24.

[0059] As Figure 5 shown, the steering gear is fixedly connected to the second fixing box 24 by the fixing clamp 25. Openings are respectively formed on two opposite side walls of the second fixing box 24, facilitating the steering tie rod to pass through and be hinged to the installation joint 4.

[0060] For a further optimized solution, a third sliding plate 37 is slidably connected to the installation platform 1 in the front-back direction. A front-back position adjusting member is provided between the third sliding plate 37 and the installation platform 1. The front-back position adjusting member is similar in structure to the second sliding driving member. The difference is that the front-back position adjusting member drives the lead screw to rotate by manually shaking the handle 38, thereby adjusting the front-back position of the third sliding plate 37 and realizing the adjustment of the front-back position of the second fixing box 24. The height adjusting member is provided between the third sliding plate 37 and the bottom of the second fixing box 24.

[0061] For a further optimized solution, the height adjusting member includes a fifth driving motor 39 fixedly connected to the third sliding plate 37. The output shaft of the fifth driving motor 39 is drivingly connected to a power divider 40. Two sets of telescopic rods 41 fixedly connected to the third sliding plate 37 are also included. The two sets of telescopic rods 41 are respectively drivingly connected to the output ends of the power divider 40. The telescopic rods 41 can adopt a lead screw transmission method inside to realize the telescopic movement of the telescopic rods 41, thereby driving the second fixing box 24 to perform height adjustment.

[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 embodiments 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, the 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), 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; 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) being drivingly connected to a first motor (6), a sliding sleeve (7) being slidably connected to the spline shaft (5) via a spline, and the mounting joint (4) being fixedly connected to the sliding sleeve (7); 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).

2. 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).

3. 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).

4. The electric drive steering system test bench according to claim 3, 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).

5. 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).

6. The electric drive steering system test bench according to claim 5, 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).

7. The electric drive steering system test bench according to claim 1, 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).

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