EPS no-load test and sensor calibration machine

Abstract

The present invention relates to an EPS no-load test and sensor calibration machine, including a touch screen controller, an electric control box, a frame, an experimental unit, a positioning fixture and a locking mechanism; the frame includes an experimental platform frame and a control frame; the electric control box is electrically connected to the touch screen controller; the experimental unit includes a support seat and a performance detection experimental instrument vertically arranged on the support seat; the support seat, the positioning fixture, and the locking machine are arranged on the experimental platform frame at the same time; the beneficial effects of the present invention are: it is suitable for carrying and testing EPS systems, and the detection items are relatively comprehensive. The automatic locking of the EPS system can be achieved through the locking device, and the experimental instrument and the limit mechanism can automatically fix the input and output ends of the EPS system. The overall matching automation degree is high, which improves the efficiency of the flow detection operation and ensures the loading and matching reliability of the EPS system; each unit has a degree of free adjustment to meet the requirements of the mounting and testing of different EPS systems.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment detection, and in particular to an EPS no-load test and sensor calibration machine. Background Art

[0002] Electric Power Steering (EPS) is a power steering system that directly relies on the motor to provide auxiliary torque. Compared with the traditional hydraulic power steering system HPS (Hydraulic Power Steering), EPS has many advantages. EPS is mainly composed of torque sensor, vehicle speed sensor, motor, reduction mechanism and electronic control unit (ECU).

[0003] The working stability and handling characteristics of the electric power steering system are related to driving safety and vehicle performance. Therefore, it is necessary to effectively detect the various performance of the steering gear and calibrate the torque sensor.

[0004] However, the existing testing equipment has poor overall stability, cannot meet the needs of rapid product changeovers, has a low degree of automation, and has low operating efficiency. Summary of the invention

[0005] In view of this, the present invention provides an EPS no-load test and sensor calibration machine which has good stability, can meet the needs of rapid replacement of different products, has a high degree of automation and high operating efficiency.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme EPS no-load test and sensor calibration machine, including a touch screen controller, an electric control box, a rack, an experimental unit, a positioning fixture and a locking mechanism;

[0007] The rack includes an experimental platform rack and a control console rack, and the control console rack is fixed to the upper part of the experimental platform rack;

[0008] The touch screen controller is fixed to one side of the console frame;

[0009] The electric control box is electrically connected to the touch screen controller, and the electric control box is fixed to the other side of the control console;

[0010] The experimental unit comprises a support seat and a performance testing experimental instrument vertically arranged on the support seat; the support seat is fixed on the experimental platform frame and is located inside the control console frame; the performance testing experimental instrument is electrically connected to the electric control box;

[0011] The positioning fixture comprises a fixture quick-change plate and a positioning clamp vertically arranged on the fixture quick-change plate for fixing the workpiece; the fixture quick-change plate is fixed to the support seat, and the positioning clamp is electrically connected to the electric control box; a through hole is provided at a position corresponding to the axis of the fixture quick-change plate and the support seat and the performance testing instrument;

[0012] The locking mechanism comprises a fixing frame and a locking device vertically arranged on the fixing frame for locking the workpiece; the fixing frame is fixed below the supporting seat, the locking device is provided with a floating head, and the floating head is arranged in the through hole.

[0013] The present invention can place the experimental equipment to be tested on the present invention through the experimental unit, the positioning fixture and the locking mechanism. The present invention is suitable for carrying and testing the EPS system, and the test items are relatively comprehensive. The present invention adopts a floating head, which can avoid damaging the spline when connected to the product to be tested; the equipment spline head adopts a fixture quick-change plate quick-change design, which can meet the rapid change of different products; the touch screen is used as the manual interface, which simplifies the operation while making the setting of the operation data more flexible, so that it can meet the testing requirements of different products. The lower part of the equipment stand adopts frame welding to ensure the stability of the equipment during the test. The upper part of the stand adopts a profile support structure, which is both beautiful and reduces the overall weight of the equipment. The overall matching has a high degree of automation, which improves the efficiency of the flow detection operation and ensures the loading and matching reliability of the EPS system. Each unit has a degree of free adjustment to meet the mounting and testing of different EPS systems.

[0014] Furthermore, the performance detection test instrument comprises a test instrument and a moving mechanism for driving the test instrument to move up and down in a vertical direction;

[0015] A ball screw is vertically fixed on the support seat, and the moving mechanism is slidably connected to the ball screw;

[0016] The experimental instrument comprises a power device and a rotating shaft, a torque sensor, a transition shaft, a universal joint and an extension head connected to the power output end of the power device in sequence from top to bottom;

[0017] The rotating shaft, the torque sensor, the transition shaft, the universal joint and the extension head are all fixed on the moving mechanism through a fixing frame.

[0018] Furthermore, the moving mechanism includes:

[0019] Upper and lower guide rails, the upper and lower guide rails are vertically arranged on the ball screw;

[0020] A movable plate, the movable plate being slidably connected to the upper and lower guide rails;

[0021] A motor mounting plate, the motor mounting plate being fixed on the ball screw and located on a corresponding surface of the moving plate;

[0022] An upper and lower servo motor, wherein the upper and lower servo motor is fixed to the lower end of the motor mounting plate, and a power output end thereof extends to the upper end of the motor mounting plate, and the upper and lower servo motor is electrically connected to the electric control box;

[0023] Synchronous pulley II, the synchronous pulley II is connected to the power output end of the upper and lower servo motors;

[0024] Synchronous pulley I, the synchronous pulley I is arranged between the movable plate and the supporting seat, and the synchronous pulley I is connected to the synchronous pulley II through a synchronous belt;

[0025] A ball screw, one end of which is fixedly connected to the lower end of the synchronous pulley I, and the other end of which is drivingly connected to the movable plate.

[0026] It also includes a motor tensioning plate, which is arranged between the motor mounting plate and the upper and lower servo motors, and the motor tensioning plate is fixedly connected to the upper and lower servo motors and detachably connected to the motor tensioning plate.

[0027] Furthermore, the power device comprises

[0028] A rotating shaft support frame, the rotating shaft support frame is fixed on the movable plate and is located at the upper end of the movable plate;

[0029] A torque servo motor, the torque servo motor is fixed on the rotating shaft support frame, and the torque servo motor is electrically connected to the electric control box;

[0030] A synchronous pulley III, wherein the synchronous pulley III is connected to an output end of the torque servo motor;

[0031] The synchronous pulley IV is arranged on one side of the synchronous pulley III and has the same height as the synchronous pulley III. The synchronous pulley IV is connected to the synchronous pulley III through a synchronous belt.

[0032] Furthermore, it also includes a limiting device, which includes a fixed clamping claw arranged around the protruding head and a clamping claw block fixed on the fixed clamping claw for setting the position of the protruding head.

[0033] Further, the positioning clamp includes a quick clamp fixing frame, a cylinder fixing plate, a workpiece support column, a quick clamp, a positioning cylinder and a workpiece support;

[0034] The quick clamp fixing frame is fixed to the fixture quick-change plate; the cylinder fixing plate fixes one side end of the quick clamp fixing frame; the positioning cylinder is fixed to the cylinder fixing plate, the quick clamp is arranged on the quick clamp fixing frame, the opening of which corresponds to the through hole and is transmission-connected to the positioning cylinder, the workpiece support column is arranged around the through hole and is fixedly connected to the fixture quick-change plate, and the workpiece support is arranged on one side of the quick clamp and is fixedly connected to the fixture quick-change plate.

[0035] The present invention adopts the above technical solution to realize the quick-change design of the equipment spline head through the positioning clamp, which can meet the rapid changeover of different products and meet the testing requirements of different products.

[0036] Furthermore, the locking device also includes a locking cylinder, a lifting base plate and a floating seat; the outer shell of the locking cylinder is fixed on the fixing frame, the output end of the locking cylinder passes through the fixing frame and is fixedly connected to the lifting base plate, the floating seat is fixed on the lifting base plate and is located on the side opposite to the connection with the locking cylinder, the floating head is arranged on the floating seat, and the locking cylinder is electrically connected to the electrical control box.

[0037] The present invention adopts the above-mentioned technical scheme to control the electric control box through the touch screen controller and then control the up and down movement of the locking cylinder. It has strong controllability and can drive the floating head to move up and down through the locking cylinder. The floating head can avoid damage to the spline when connected to the product under test, and will not cause detection damage later.

[0038] Furthermore, the locking device also includes a guide shaft, and the guide shaft is a plurality of guide shafts respectively arranged on the sides of the locking cylinder, one end of any one of the guide shafts is fixedly connected to the lifting base plate, and the other end is arranged on the fixing frame and slidably connected to the fixing frame.

[0039] The present invention adopts the above-mentioned technical scheme to stabilize the locking cylinder by utilizing the guide shaft, so that the locking cylinder can stably support the up and down movement of the lifting base plate under the action of the guide shaft, prevent the lateral displacement of the lifting base plate, the floating seat and the floating head, and effectively prevent the deviation of the monitored equipment and the inaccuracy of the experimental data.

[0040] The beneficial effects of the present invention are:

[0041] 1. Suitable for installation and testing of EPS system, with comprehensive testing items.

[0042] 2. The locking device can realize automatic locking of the EPS system, while the test instrument and the limit mechanism can automatically fix the input and output ends of the EPS system. The overall connection has a high degree of automation, which improves the efficiency of the flow detection operation and ensures the loading connection reliability of the EPS system.

[0043] 3. Each unit has a degree of freedom of adjustment to meet the installation and testing of different EPS systems.

[0044] 4. The detection device is highly integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1 It is a schematic diagram of the overall structure of the EPS no-load test and sensor calibration machine of the present invention;

[0047] Figure 2 It is a schematic diagram of the experimental unit structure of the EPS no-load test and sensor calibration machine of the present invention;

[0048] Figure 3 It is a schematic diagram of the positioning fixture structure of the EPS no-load test and sensor calibration machine of the present invention;

[0049] Figure 4 It is a schematic diagram of the locking mechanism structure of the EPS no-load test and sensor calibration machine of the present invention;

[0050] Among them, in the figure: 1 is a touch screen controller, 2 is an electric control box, 3 is a rack, 31 is an experimental platform, 32 is a control rack, 4 is an experimental unit, 4-1 is a support seat, 4-01 is a mounting plate, 4-2 is an upper and lower guide rail, 4-3 is a moving plate, 4-4 is an upper and lower servo motor, 4-5 is a motor tensioning plate, 4-6 is a motor mounting plate, 4-7 is a synchronous pulley II, 4-8 is a synchronous pulley I, 4-9 is a ball screw, 4-11 is a synchronous pulley III, 4-12 is a torque servo motor, 4-13 is a synchronous pulley IV, 4-14 is a rotating shaft, 4-15 is a rotating shaft support frame. 4-16 is a torque sensor, 4-17 is a transition shaft, 4-18 is a universal joint, 4-19 is a fixed frame, and 4-20 is a fixed clamp. 4-21 is a clamping claw block, 4-22 is an extension head, 5 is a positioning fixture, 5-1 is a fixture quick-change plate, 5-2 is a workpiece support column, 5-3 is a quick clamp fixing frame, 5-4 is a quick clamp, 5-5 is a cylinder fixing plate, 5-6 is a positioning cylinder, 5-7 is a workpiece support, 6 is a locking mechanism, 6-1 is a fixing frame, 6-2 is a guide shaft, 6-3 is a locking cylinder, 6-4 is a lifting base plate, 6-5 is a floating seat, and 6-6 is a floating head. DETAILED DESCRIPTION

[0051] 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.

[0052] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] like Figure 1 and Figure 4As shown: The present invention adopts the following technical solution EPS no-load test and sensor calibration machine, including a touch screen controller 1, an electric control box 2, a frame 3, an experimental unit 4, a positioning fixture 5 and a locking mechanism 6;

[0057] The rack 3 includes an experimental platform rack 31 and a control rack 32, and the control rack 32 is fixed on the upper part of the experimental platform rack 31;

[0058] The touch screen controller 1 is fixed to one side of the console stand 32;

[0059] The electric control box 2 is electrically connected to the touch screen controller 1, and the electric control box 2 is fixed to the other side of the console frame 32;

[0060] The experimental unit 4 includes a support base 4-1 and a performance detection experimental instrument vertically arranged on the support base 4-1; the support base 4-1 is fixed on the experimental platform frame 31 and is located inside the control frame 32; the performance detection experimental instrument 42 is electrically connected to the electric control box 2;

[0061] The positioning fixture 5 includes a fixture quick-change plate 5-1 and a positioning clamp vertically arranged on the fixture quick-change plate 5-1 for fixing the workpiece; the fixture quick-change plate 5-1 is fixed to the support seat 4-1, and the positioning clamp is electrically connected to the electric control box 2; a through hole is provided at a position corresponding to the axis of the fixture quick-change plate 5-1 and the support seat 4-1 and the performance testing instrument;

[0062] The locking mechanism 6 includes a fixing frame 6-1 and a locking device vertically disposed on the fixing frame 6-1 for locking the workpiece; the fixing frame 6-1 is fixed below the supporting seat 4-1, and a floating head 6-6 is disposed on the locking device, and the floating head 6-6 is disposed in the through hole.

[0063] like Figure 1 As shown, in order to better display the locking mechanism 6, the locking mechanism 6 is deliberately moved to the edge of the overall device in this embodiment so that it can be clearly seen.

[0064] In this embodiment, the experimental equipment to be tested can be placed on the present invention through the experimental unit 4, the positioning fixture 5 and the locking mechanism 6. The present invention is suitable for carrying and testing EPS systems, and the test items are relatively comprehensive. The present invention adopts a floating head 6-6, which can avoid damaging the spline when connected to the product under test; the equipment spline head adopts a fixture quick-change plate 5-1 quick-change design, which can meet the rapid changeover of different products; the touch screen is used as the manual interface, which simplifies the operation while making the setting of the operation data more flexible, so that it can meet the testing requirements of different products. The lower part of the equipment stand adopts frame welding to ensure the stability of the equipment during the test. The upper part of the stand adopts a profile support structure, which is both beautiful and reduces the overall weight of the equipment. The overall matching has a high degree of automation, which improves the efficiency of the flow detection operation and ensures the loading and matching reliability of the EPS system. Each unit has a degree of free adjustment to meet the mounting and testing of different EPS systems.

[0065] In this embodiment, the performance detection test instrument includes a test instrument and a moving mechanism for driving the test instrument to move up and down in a vertical direction;

[0066] A ball screw 4-01 is vertically fixed on the support seat 4-1, and the moving mechanism is slidably connected to the ball screw 4-01;

[0067] The experimental instrument includes a power device and a rotating shaft 4-14, a torque sensor 4-16, a transition shaft 4-17, a universal joint 4-18 and an extension head 4-22 connected to the power output end of the power device in sequence from top to bottom;

[0068] The rotating shaft 4-14, the torque sensor 4-16, the transition shaft 4-17, the universal joint 4-18 and the extension head 4-22 are all fixed on the moving mechanism through the fixing frame 4-19.

[0069] In this embodiment, the moving mechanism includes upper and lower guide rails 4-2, a moving plate 4-3, a motor mounting plate 4-6, upper and lower servo motors 4-4, synchronous pulleys II 4-7, synchronous pulleys I 4-8, and a ball screw 4-9.

[0070] The upper and lower guide rails 4-2 are vertically arranged on the ball screw 4-01;

[0071] The movable plate 4-3 is slidably connected with the upper and lower guide rails 4-2;

[0072] The motor mounting plate 4-6 is fixed on the ball screw 4-01 and is located on the corresponding surface of the moving plate 4-3;

[0073] The upper and lower servo motors 4-4 are fixed to the lower end of the motor mounting plate 4-6, and the power output end thereof extends to the upper end of the motor mounting plate 4-6. The upper and lower servo motors 4-4 are electrically connected to the electric control box 2;

[0074] The synchronous pulley II 4-7 is connected to the power output end of the upper and lower servo motors 4-4;

[0075] The synchronous pulley I4-8 is arranged between the moving plate 4-3 and the supporting seat 4-1, and the synchronous pulley I4-8 is connected to the synchronous pulley II4-7 through the synchronous belt;

[0076] One end of the ball screw 4-9 is fixedly connected to the lower end of the synchronous pulley I4-8, and the other end is transmission-connected to the movable plate 4-3.

[0077] The power device includes a rotating shaft support frame 4-15, a torque servo motor 4-12, a synchronous pulley III 4-11, and a synchronous pulley IV 4-13;

[0078] The shaft support frame 4-15 is fixed on the moving plate 4-3 and is located at the upper end of the moving plate 4-3;

[0079] The torque servo motor 4-12 is fixed on the shaft support frame 4-15, and the torque servo motor 4-12 is electrically connected to the electric control box 2;

[0080] The synchronous pulley III 4-11 is connected to the output end of the torque servo motor 4-12;

[0081] The synchronous pulley IV4-13 is arranged on one side of the synchronous pulley III4-11 and has the same height. The synchronous pulley IV4-13 is connected to the synchronous pulley III4-11 through a synchronous belt.

[0082] It also includes a limiting device, which includes a fixed clamping jaw 4-20 arranged around the protruding head 4-22 and a clamping jaw block 4-21 fixed on the fixed clamping jaw 4-20 for setting the position of the protruding head 4-22.

[0083] When this embodiment is in use, the upper and lower servo motors 4-4 drive the synchronous pulley II 4-7 to rotate, which in turn drives the synchronous pulley I 4-8 to rotate through the synchronous belt, thereby causing the ball screw 4-9 to drive the movable plate 4-3 to move up and down. The upper and lower guide rails 4-2 on both sides of the movable plate 4-3 make the overall up and down movement more stable.

[0084] The present embodiment also includes a motor tensioning plate 4-5, which is disposed between the motor mounting plate 4-6 and the upper and lower servo motors 4-4, and the motor tensioning plate 4-5 is fixedly connected to the upper and lower servo motors 4-4 and detachably connected to the motor tensioning plate 4-5.

[0085] The motor tensioning plate 4-5 can adjust the position relationship on the motor mounting plate 4-6 to achieve the tensioning of the synchronous belts of the upper and lower servo motors 4-4, making their operation more stable, the synchronous belts achieving synchronous movement, and high control performance.

[0086] In this embodiment, the positioning clamp includes a quick clamp fixing frame 5-3, a cylinder fixing plate 5-5, a workpiece support column 5-2, a quick clamp 5-4, a positioning cylinder 5-6 and a workpiece support 5-7;

[0087] The quick clamp fixing frame 5-3 is fixed on the fixture quick change plate 5-1; the cylinder fixing plate 5-5 fixes one side end of the quick clamp fixing frame 5-3; the positioning cylinder 5-6 is fixed on the cylinder fixing plate 5-5, the quick clamp 5-4 is arranged on the quick clamp fixing frame 5-3, its opening corresponds to the through hole and is transmission connected with the positioning cylinder 5-6, the workpiece support column 5-2 is arranged around the through hole and is fixedly connected with the fixture quick change plate 5-1, and the workpiece support 5-7 is arranged on one side of the quick clamp 5-4 and is fixedly connected with the fixture quick change plate 5-1.

[0088] In this embodiment, there are three workpiece support columns 5 - 2 , which are evenly arranged around the through hole, so that the workpiece support columns 5 - 2 can play a better supporting role.

[0089] The present invention adopts the above technical solution to realize the quick-change design of the equipment spline head through the positioning clamp, which can meet the rapid changeover of different products and meet the testing requirements of different products.

[0090] In this embodiment, the locking device also includes a locking cylinder 6-3, a lifting base plate 6-4 and a floating seat 6-5; the outer shell of the locking cylinder 6-3 is fixed on the fixed frame 6-1, the output end of the locking cylinder 6-3 passes through the fixed frame 6-1 and is fixedly connected to the lifting base plate 6-4, the floating seat 6-5 is fixed on the lifting base plate 6-4 and is located on the side opposite to the connection with the locking cylinder 6-3, the floating head 6-6 is arranged on the floating seat 6-5, and the locking cylinder 6-3 is electrically connected to the electrical control box 2.

[0091] The present invention adopts the above technical scheme to control the electric control box 2 through the touch screen controller 1 and then control the up and down movement of the locking cylinder 6-3. It has strong controllability and can drive the floating head 6-6 to move up and down through the locking cylinder 6-3. The floating head can avoid damaging the spline when connected to the product under test, and will not cause detection damage.

[0092] Furthermore, the locking device also includes a guide shaft 6-2, which is a plurality of guide shafts 6-2 respectively arranged on the sides of the locking cylinder 6-3, and one end of any guide shaft 6-2 is fixedly connected to the lifting base plate 6-4, and the other end is arranged on the fixed frame 6-1 and slidably connected to the fixed frame 6-1.

[0093] The present invention adopts the above-mentioned technical scheme and can utilize the guide shaft 6-2 to stabilize the locking cylinder 6-3, so that the locking cylinder 6-3 can stably support the lifting base plate 6-4 to move up and down under the action of the guide shaft 6-2, prevent the skew displacement of the lifting base plate 6-4, the floating seat 6-5 and the floating head 6-6, and effectively prevent the deviation of the monitored equipment and the inaccuracy of the experimental data.

[0094] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. EPS no-load test and sensor calibration machine, characterized by: include A frame (3), the frame (3) comprising an experimental platform frame (31) and a control frame (32), the control frame (32) being fixed on the upper part of the experimental platform frame (31); A touch screen controller (1), wherein the touch screen controller (1) is fixed on one side of the console frame (32); An electric control box (2), the electric control box (2) being electrically connected to the touch screen controller (1), and the electric control box (2) being fixed on the other side of the control console frame (32); The experimental unit (4) comprises a support seat (4-1) and a performance detection experimental instrument vertically arranged on the support seat (4-1); the support seat (4-1) is fixed on the experimental platform frame (31) and is located inside the control console frame (32); the performance detection experimental instrument (42) is electrically connected to the electric control box (2); the performance detection experimental instrument comprises an experimental instrument and a moving mechanism for driving the experimental instrument to move up and down in a vertical direction; a ball screw (4-01) is vertically fixed on the support seat (4-1), The moving mechanism is slidably connected to the ball screw (4-01); the experimental instrument comprises a power device and a rotating shaft (4-14), a torque sensor (4-16), a transition shaft (4-17), a universal joint (4-18) and an extension head (4-22) connected to the power output end of the power device from top to bottom in sequence; the rotating shaft (4-14), the torque sensor (4-16), the transition shaft (4-17), the universal joint (4-18) and the extension head (4-22) are all fixed to the moving mechanism via a fixing frame (4-19); The moving mechanism comprises upper and lower guide rails (4-2), the upper and lower guide rails (4-2) being vertically arranged on the ball screw (4-01); a moving plate (4-3), the moving plate (4-3) being slidably connected to the upper and lower guide rails (4-2); a motor mounting plate (4-6), the motor mounting plate (4-6) being fixed on the ball screw (4-01) and being located on the corresponding surface of the moving plate (4-3); and upper and lower servo motors (4-4), the upper and lower servo motors (4-4) being arranged at the lower end of the motor mounting plate (4-6), the power output end of the upper and lower servo motors (4-4) extending to the upper end of the motor mounting plate (4-6), the upper and lower servo motors (4-4) being arranged at the lower end of the motor mounting plate (4-6), the power output end of the upper and lower servo motors (4-4) extending to the upper end of the motor mounting plate (4-6), and the upper and lower servo motors (4-4) being arranged at the upper end of the motor mounting plate (4-6). The machine (4-4) is electrically connected to the electric control box (2); a synchronous pulley II (4-7), the synchronous pulley II (4-7) is connected to the power output end of the upper and lower servo motors (4-4); a synchronous pulley I (4-8), the synchronous pulley I (4-8) is arranged between the movable plate (4-3) and the support seat (4-1), and the synchronous pulley I (4-8) is transmission-connected to the synchronous pulley II (4-7) through a synchronous belt; a ball screw (4-9), one end of the ball screw (4-9) is fixedly connected to the lower end of the synchronous pulley I (4-8), and the other end is transmission-connected to the movable plate (4-3); A positioning fixture (5), the positioning fixture (5) comprising a fixture quick-change plate (5-1) and a positioning clamp vertically arranged on the fixture quick-change plate (5-1) for fixing a workpiece; the fixture quick-change plate (5-1) is fixed to the support seat (4-1), and the positioning clamp is electrically connected to the electric control box (2); a through hole is provided at a position corresponding to the axis of the performance testing instrument on the fixture quick-change plate (5-1) and the support seat (4-1); the positioning clamp comprises a quick clamp fixing frame (5-3), a cylinder fixing plate (5-5), a workpiece support column (5-2), a quick clamp (5-4), a positioning cylinder (5-6) and a workpiece support member (5-7); the quick clamp The clamp fixing frame (5-3) is fixed on the clamp quick-change plate (5-1); the cylinder fixing plate (5-5) fixes one side end of the quick clamp fixing frame (5-3); the positioning cylinder (5-6) is fixed on the cylinder fixing plate (5-5); the quick clamp (5-4) is arranged on the quick clamp fixing frame (5-3), the opening of which corresponds to the through hole and is drivingly connected to the positioning cylinder (5-6); the workpiece supporting column (5-2) is arranged around the through hole and is fixedly connected to the clamp quick-change plate (5-1); the workpiece supporting member (5-7) is arranged on one side of the quick clamp (5-4) and is fixedly connected to the clamp quick-change plate (5-1); A locking mechanism (6), the locking mechanism (6) comprising a fixed frame (6-1) and a locking device vertically arranged on the fixed frame (6-1) for locking a workpiece; the fixed frame (6-1) is fixed below the support seat (4-1), the locking device is provided with a floating head (6-6), and the floating head (6-6) is arranged in the through hole; the locking device also comprises a locking cylinder (6-3), a lifting base plate (6-4) and a floating seat (6-5); the outer shell of the locking cylinder (6-3) is fixed on the fixed frame (6-1), and the output end of the locking cylinder (6-3) passes through the fixed frame (6-1) and the lifting base plate (6-4). The plate (6-4) is fixedly connected, the floating seat (6-5) is fixed on the lifting base plate (6-4) and is located on the side opposite to the connection with the locking cylinder (6-3), the floating head (6-6) is arranged on the floating seat (6-5), and the locking cylinder (6-3) is electrically connected to the electric control box (2); the locking device also includes a guide shaft (6-2), and the guide shaft (6-2) is respectively arranged on the side of the locking cylinder (6-3), one end of any one of the guide shafts (6-2) is fixedly connected to the lifting base plate (6-4), and the other end is arranged on the fixed frame (6-1) and is slidably connected to the fixed frame (6-1).

2. The EPS no-load test and sensor calibration machine according to claim 1, characterized in that: It also includes a motor tensioning plate (4-5), which is arranged between the motor mounting plate (4-6) and the upper and lower servo motors (4-4), and the motor tensioning plate (4-5) is fixedly connected to the upper and lower servo motors (4-4) and detachably connected to the motor mounting plate (4-6).

3. The EPS no-load test and sensor calibration machine according to claim 1, characterized in that: The power device comprises A rotating shaft support frame (4-15), wherein the rotating shaft support frame (4-15) is fixed on the movable plate (4-3) and is located at the upper end of the movable plate (4-3); A torque servo motor (4-12), wherein the torque servo motor (4-12) is fixed on the rotating shaft support frame (4-15), and the torque servo motor (4-12) is electrically connected to the electric control box (2); A synchronous pulley III (4-11), the synchronous pulley III (4-11) is connected to the output end of the torque servo motor (4-12); a synchronous pulley IV (4-13), the synchronous pulley IV (4-13) is arranged on one side of the synchronous pulley III (4-11) and has the same height, and the synchronous pulley IV (4-13) is connected to the synchronous pulley III (4-11) through a synchronous belt.

4. The EPS no-load test and sensor calibration machine according to claim 1 or 3, characterized in that: It also includes a limiting device, which includes a fixed clamping claw (4-20) arranged around the protruding head (4-22) and a clamping claw block (4-21) fixed on the fixed clamping claw (4-20) and used for setting the position of the protruding head (4-22).

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