A steering column dynamic pressure bearing performance testing device

Abstract

The invention discloses a steering column dynamic pressure bearing performance test device, which relates to the field of test equipment, including an active component, a passive component and a clamping component, wherein the active component includes a detection unit, a driving unit and an adjustment unit, wherein the driving unit includes a driving rod, a driving inner gear ring and a clamping screw, wherein the driving rod can drive the driving inner gear ring and the clamping screw to rotate, and the clamping screw can lock the end of the steering column on the driving inner gear ring; the detection unit includes a torque sensor and an angle sensor, and the torque sensor and the angle sensor are both installed on the driving rod. When the steering column is tested, the steering column is more efficiently fixed and has a better fixing effect. The torque sensor applies a torque to the steering column, and when the angle sensor detects the torsion value of the steering column, the steering column will not slide between the fixing part to cause abnormal anti-torsion data, thereby improving the detection accuracy of the steering column.

Description

Technical Field

[0001] The invention relates to the field of testing equipment, and in particular to a steering column dynamic pressure bearing performance testing device. Background Art

[0002] The steering column is a key component in the car's steering system. It is responsible for connecting the steering wheel and the steering gear, transmitting the steering instructions applied by the driver through the steering wheel, and ensuring that the car can change the driving direction according to the driver's intention. The steering column is usually located at the front of the vehicle and is the connecting component between the steering wheel and the steering gearbox.

[0003] The structure of the steering column usually includes steering shaft, switch fixing plate, steering lock sleeve, deep groove ball bearing, column bracket, positioning bracket, fixing seat, dust cover, universal joint fork, transmission shaft, sleeve and other components. The steering shaft is the core component for transmitting the driver's steering torque. Its upper part is fixedly connected to the steering wheel and its lower part is connected to the steering gear. The universal joint fork is used to achieve variable angle power transmission, allowing the steering shaft to rotate in the sleeve.

[0004] The dynamic pressure bearing performance test of the steering column is an important means to evaluate the safety and reliability of the automobile steering system when subjected to external force impact. The test data can help engineers understand the behavior of the steering column when subjected to pressure, including the magnitude of the force it can withstand, the crushing distance and the degree of deformation of the material. The upper end of the steering column is connected to the steering wheel, which often has an external gear and a screw hole. The steering wheel is inserted into the external gear and locked in the screw hole with bolts. The lower end of the steering column is connected to the steering gear through a universal joint. The universal joint is provided with an inner gear ring and a gap. The inner gear ring on the universal joint is mounted on the gear of the steering gear, and the gap on the universal joint is locked with bolts.

[0005] Chinese patent application CN105387832A discloses a steering column lower transmission shaft rotation clearance test bench and test method. The bench is composed of a base plate, a support frame, a clamping frame, a secondary clamping frame and a displacement measuring device. The core component is a T-shaped test rod, one end of which is equipped with a chuck and the other end is equipped with a hook. By hanging a heavy object on the hook, the load condition under the actual working state can be simulated, and the rotation clearance of the transmission shaft can be accurately measured. The test method is not only low-cost, but also has high measurement accuracy. It is suitable for the detection of various steering columns and can quickly and accurately identify the problem.

[0006] Chinese patent application CN115753153A discloses a comprehensive performance test device for a steering column assembly, which integrates a variety of precision components such as a base plate, a dynamometer, a servo electric cylinder, a tension and compression test connection, a torque sensor, a tension and compression sensor, and a servo motor. Through the coordinated work of these components, the device can perform a full range of performance tests on the steering column, including but not limited to torque transmission, tension and compression bearing and other key indicators. In particular, the combination of the servo motor and the dynamometer enables the inner shaft of the steering column to be accurately tested under simulated real working conditions. In addition, the introduction of torque sensors and tension and compression sensors further improves the accuracy and reliability of test data, greatly improving the efficiency and comprehensiveness of steering column testing.

[0007] The above patents and prior art also have the following defects:

[0008] The existing steering column detection equipment needs to clamp the steering column, clamp and fix one end of the steering column, and drive it to rotate after the other end is fixed, so as to detect the deformation of the steering column when torque is applied to the steering column. The clamping force of the clamping assembly of the prior art on the steering column is small, and the torque required to be applied when detecting the steering column is large, which makes it easy for the clamping assembly and the steering assembly to rotate, resulting in inaccurate detection data.

[0009] Therefore, the present application provides a steering column dynamic pressure bearing performance testing device to meet the needs. Summary of the invention

[0010] The purpose of the present application is to provide a dynamic pressure-bearing performance testing device for a steering column, which fixes and limits the steering column through the structure of the steering column itself. When the steering column is tested, the fixing efficiency of the steering column is higher and the fixing effect of the steering column is better. When a torque sensor applies a torque to the steering column and an angle sensor detects the torsion value of the steering column, the steering column will not slide between the fixing part to cause abnormal anti-torsion data, thereby improving the detection accuracy of the steering column.

[0011] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a steering column dynamic pressure bearing performance test device, comprising an active component, a passive component and a clamping component, wherein the active component comprises a detection unit, a driving unit and an adjustment unit, wherein the driving unit comprises a driving rod, a driving inner gear ring and a clamping screw, wherein the driving rod can drive the driving inner gear ring and the clamping screw to rotate, and the clamping screw can lock the end of the steering column on the driving inner gear ring;

[0012] The detection unit includes a torque sensor and an angle sensor, and the torque sensor and the angle sensor are both installed on the driving rod;

[0013] The adjustment unit can drive the detection unit and the driving unit to move vertically;

[0014] The passive component includes a limit unit and a locking unit, the limit unit includes a limit spline shaft, and the locking unit includes two locking blocks and two moving blocks. When the two moving blocks move, they first drive the limit spline shaft to move in the direction of the locking block, and then drive the two locking blocks to move toward each other.

[0015] The clamping assembly is capable of clamping a steering column.

[0016] Preferably, the locking unit also includes a locking motor, a locking screw, two locking springs and two locking cylinders, the threads at both ends of the locking screw have opposite directions, the two moving blocks are both sleeved on the locking screw and threadedly cooperate with the locking screw, the locking screw is fixedly mounted on the output end of the locking motor, the two locking blocks are both sleeved on the locking screw and slidingly cooperate with the locking screw, the two locking cylinders are respectively fixedly mounted on the corresponding moving blocks and sleeved on the locking screw, the middle part of the locking screw is rotatably connected to a support block, one end of the two locking springs are both fixedly mounted on both sides of the support block, and the other end of the two locking springs are fixedly mounted on the corresponding locking blocks.

[0017] Preferably, the limiting unit also includes a fixed block, a supporting wedge block, a limiting frame and two pushing wedge blocks, the fixed block is fixedly mounted on the limiting spline shaft, the cross-section of the fixed block is rectangular, the fixed block is arranged in the limiting frame and cooperates with the limiting frame, a fixed plate is fixedly mounted on the fixed block, the supporting wedge block is fixedly mounted on the fixed plate, both sides of the supporting wedge block are inclined, the two pushing wedge blocks are respectively fixedly mounted on the corresponding moving blocks, and one end of the pushing wedge block corresponding to the supporting wedge block is inclined.

[0018] Preferably, the passive component also includes a fixed shell, the locking motor is fixedly mounted on the fixed shell, the locking screw is rotatably connected to the fixed shell, and the limiting unit also includes a connecting block, a connecting rod and a limiting spring, the connecting block is fixedly mounted on the fixed shell, the connecting rod is fixedly mounted on a fixed plate, the connecting rod passes through the connecting block and slidably cooperates with the connecting block, one end of the limiting spring is fixedly mounted on the fixed plate, and the other end of the limiting spring is fixedly mounted on the connecting block.

[0019] Preferably, the clamping assembly includes two clamping blocks, two pushing blocks, a clamping motor, a clamping screw and a clamping base, the clamping motor is fixedly mounted on the clamping base, the clamping screw is rotatably connected to the clamping base, the two pushing blocks are respectively fixedly mounted on the corresponding clamping blocks, the two pushing blocks are both slidably fitted on the clamping base, the thread directions at both ends of the clamping screw are opposite, the clamping screw is fixedly mounted on the output end of the clamping motor, and the pushing blocks are both sleeved on the clamping screw and threadedly connected to the clamping screw.

[0020] Preferably, the driving unit also includes a driving motor, a rotating plate and a driving frame, the torque sensor is fixedly mounted on the output end of the driving motor, the driving frame is fixedly mounted on the driving rod, the driving motor is fixedly mounted on the rotating plate, a connecting plate is fixedly mounted on the rotating plate, and the driving frame is rotatably connected to the connecting plate.

[0021] Preferably, the driving unit also includes a clamping motor, which is fixedly mounted in the driving frame, the clamping screw is rotatably connected to the driving frame, the clamping screw is fixedly mounted on the output end of the locking motor, and the driving inner gear ring is fixedly mounted on the driving frame.

[0022] Preferably, the adjustment unit includes a lifting motor, a lifting belt member, two lifting screws, two lifting blocks, a lifting plate and a rotating motor, the lifting belt member includes two transmission pulleys and a transmission belt, the two transmission pulleys are respectively fixedly mounted on the corresponding lifting screws, the transmission belt is connected to the two transmission pulleys, the output end of the lifting motor is fixedly mounted on one of the lifting screws, the two lifting blocks are respectively sleeved on the corresponding lifting screws and threadedly connected to the lifting screws, the lifting plate is fixedly mounted on the two lifting blocks, the rotating motor is fixedly mounted on the lifting plate, and the output end of the rotating motor is fixedly mounted on the rotating plate.

[0023] Preferably, the active component, passive component and clamping component are all installed on the workbench, the limit frame is fixedly installed on the workbench, the fixed shell is fixedly installed on the workbench, the locking block passes through the workbench and slides with the workbench, the clamping base is fixedly installed on the workbench, the lifting screw is rotatably connected to the workbench, a working top plate is fixedly installed on the workbench, and the lifting motor is fixedly installed on the working top plate.

[0024] Preferably, a control single chip microcomputer is provided in the workbench, and the locking motor, clamping motor, pressing motor, driving motor, lifting motor, torque sensor and angle sensor are all electrically connected to the control single chip microcomputer. A start button and a display are also installed on the workbench, and the start button and the display are all electrically connected to the control single chip microcomputer.

[0025] In summary, the technical effects and advantages of the present invention are as follows:

[0026] 1. In the present invention, the passive component is inserted into the end of the steering column through the limit spline shaft, and cooperates with the inner gear ring at the end of the steering column. The two locking blocks lock the lower end of the steering column, so that the inner gear ring at the lower end of the steering column is engaged with the limit spline shaft, and the limit spline shaft cooperates more closely with the steering column, and the lower end of the steering column will not rotate. The upper end of the steering column is inserted into the driving inner gear ring, and the driving inner gear ring is engaged with the spline at the upper end of the steering column. The pressing screw is rotated and threadedly connected in the steering column, and the steering column is pressed in the driving inner gear ring. The driving rod drives the upper end of the steering column to rotate through the driving inner gear ring. The steering column is fixed and limited by the structure of the steering column itself. When the steering column is tested, the steering column is more efficient in fixing and has a better fixing effect. When the torque sensor applies a torque to the steering column, and the angle sensor detects the torsion value of the steering column, the steering column will not slide between the fixing member to cause abnormal anti-torsion data, thereby improving the detection accuracy of the steering column.

[0027] 2. The lifting motor drives a transmission pulley to rotate, and the transmission pulley rotates another transmission pulley through the transmission belt. The two transmission pulleys drive the lifting screw to rotate, and the lifting block moves on the lifting screw. The lifting block drives the lifting plate to move vertically, and the lifting plate drives the active component to move vertically. At the same time, the rotating motor drives the rotating plate to rotate, adjusts the angle of the active component, and enables the active component to adapt to steering columns of different lengths, with stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application 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 some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the active component, the passive component and the clamping component in the present invention;

[0030] Figure 2 It is a structural schematic diagram of the adjustment unit, the clamping assembly and the workbench of the present invention;

[0031] Figure 3 For the present invention Figure 2 A magnified view of part A;

[0032] Figure 4 For the present invention Figure 2 A magnified view of part B;

[0033] Figure 5 The schematic diagram of the structure of the lifting screw, lifting block, lifting plate and rotating motor in the present invention is

[0034] Figure 6 It is a schematic diagram of the structure of the lifting motor, the lifting belt and the lifting screw in the present invention;

[0035] Figure 7 For the present invention Figure 6 Enlarged view of part C;

[0036] Figure 8 It is a schematic diagram of the structure of the driving inner gear ring, the pressing screw and the driving motor in the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the torque sensor, the drive frame and the clamping motor in the present invention;

[0038] Fig.10 It is a schematic diagram of the structure of the limiting unit, the locking unit and the fixing shell in the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the limited spline shaft, the fixed block and the locking block in the present invention;

[0040] Fig.12 It is a schematic diagram of the structure of the clamping block, the pushing block, the clamping motor, the clamping screw and the clamping base in the present invention;

[0041] Fig.13 It is a structural schematic diagram of a steering column in the prior art.

[0042] In the figure: 1. Active component; 11. Detection unit; 111. Torque sensor; 112. Angle sensor; 12. Driving unit; 121. Driving rod; 122. Driving inner gear ring; 123. Pressing screw; 124. Driving motor; 125. Rotating plate; 126. Driving frame; 127. Pressing motor; 13. Adjusting unit; 131. Lifting motor; 132. Lifting belt; 133. Lifting screw; 134. Lifting block; 135. Lifting plate; 136. Rotating motor; 2. Passive component; 21. Limiting unit; 211. Limiting spline shaft; 212. Fixing block; 2 13. Support wedge; 214. Limit frame; 215. Push wedge; 216. Connecting block; 217. Connecting rod; 218. Limit spring; 22. Locking unit; 221. Locking block; 222. Moving block; 223. Locking motor; 224. Locking screw; 225. Locking spring; 226. Locking cylinder; 23. Fixed shell; 3. Clamping assembly; 31. Clamping block; 32. Pushing block; 33. Clamping motor; 34. Clamping screw; 35. Clamping base; 4. Workbench; 5. Work top plate; 7. Control single chip microcomputer; 8. Start button; 9. Display; 10. Steering column. DETAILED DESCRIPTION

[0043] 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.

[0044] Example: Reference Figure 1-Figure 13 A steering column dynamic pressure bearing performance test device shown in the figure comprises an active component 1, a passive component 2 and a clamping component 3, wherein the active component 1 comprises a detection unit 11, a driving unit 12 and an adjustment unit 13, the driving unit 12 comprises a driving rod 121, a driving inner gear ring 122 and a clamping screw 123, the driving rod 121 can drive the driving inner gear ring 122 and the clamping screw 123 to rotate, and the clamping screw 123 can lock the end of the steering column 10 on the driving inner gear ring 122;

[0045] The detection unit 11 includes a torque sensor 111 and an angle sensor 112, and the torque sensor 111 and the angle sensor 112 are both mounted on a driving rod 121;

[0046] The adjustment unit 13 can drive the detection unit 11 and the driving unit 12 to move vertically;

[0047] The passive component 2 includes a limit unit 21 and a locking unit 22. The limit unit 21 includes a limit spline shaft 211. The locking unit 22 includes two locking blocks 221 and two moving blocks 222. When the two moving blocks 222 move, they first drive the limit spline shaft 211 to move toward the locking block 221, and then drive the two locking blocks 221 to move toward each other.

[0048] The clamp assembly 3 can clamp the steering column 10 .

[0049] The end of the steering column 10 close to the steering gear is the lower end, and the end of the steering column 10 close to the steering wheel is the upper end. The lower end of the steering column 10 corresponds to the passive component 2, and the upper end of the steering column 10 corresponds to the active component 1. The steering column 10 is first clamped by the clamping motor 33, and the lower end of the steering column 10 corresponds to the locking screw 224. The two moving blocks 222 move, first driving the limit spline shaft 211 to move toward the locking block 221, and the limit spline shaft 211 moves toward the steering column The lower end of the steering column 10 moves, and the limiting spline shaft 211 moves into the inner gear ring at the lower end of the steering column 10. The limiting spline shaft 211 cooperates with the inner gear ring at the lower end of the steering column 10. Then the moving block 222 drives the two locking blocks 221 to move toward each other. The two locking blocks 221 clamp the lower end of the steering column 10. The inner gear ring at the lower end of the steering column 10 has a notch. The two locking blocks 221 squeeze the inner gear ring to deform and press the inner gear ring onto the limiting spline shaft 211. The shaft 211 limits one end of the steering column 10, and the upper end of the steering column 10, that is, the end close to the steering wheel, is inserted into the driving inner gear ring 122. The other end of the steering column 10 has a spline that engages with the driving inner gear ring 122. When the steering column 10 is inserted into the driving inner gear ring 122, the pressing screw 123 rotates. The upper end of the steering column 10 is provided with a screw hole. The pressing screw 123 is screwed into the screw hole at the upper end of the steering column 10 and is threadedly connected with the steering column 10. The steering column 10 is locked in the driving inner gear ring 122, the driving rod 121 rotates, the driving rod 121 transmits the torque to the torque sensor 111, the torque sensor 111 transmits the torque to the driving inner gear ring 122, the driving inner gear ring 122 applies torque to the upper end of the steering column 10, and the lower end of the steering column 10 is locked by the passive component 2, the angle sensor 112 detects the torsional deformation value of the steering column 10 under a certain torque, thereby detecting the torsional strength of the steering column 10.

[0050] The passive component 2 is inserted into the end of the steering column 10 through the limit spline shaft 211, and cooperates with the inner gear ring at the end of the steering column 10. The two locking blocks 221 lock the lower end of the steering column 10, so that the inner gear ring at the lower end of the steering column 10 is engaged with the limit spline shaft 211. The limit spline shaft 211 cooperates more tightly with the steering column 10, and the lower end of the steering column 10 does not rotate. The upper end of the steering column 10 is inserted into the driving inner gear ring 122, and the driving inner gear ring 122 is engaged with the spline at the upper end of the steering column 10. The compression screw 123 is rotated and threadedly connected in the steering column 10, and the steering column The column 10 is pressed tightly in the driving inner gear ring 122, and the driving rod 121 drives the upper end of the steering column 10 to rotate by driving the inner gear ring 122. The steering column 10 is fixed and limited by the structure of the steering column 10 itself. When the steering column 10 is tested, the fixing efficiency of the steering column 10 is higher and the fixing effect of the steering column 10 is better. When the torque sensor 111 applies a torque to the steering column 10 and the angle sensor 112 detects the torsion value of the steering column 10, the steering column 10 will not slide between the fixing part to cause abnormal anti-torsion data, thereby improving the detection accuracy of the steering column 10.

[0051] Further, refer to Figure 1-Figure 13 The locking unit 22 also includes a locking motor 223, a locking screw 224, two locking springs 225 and two locking cylinders 226. The thread directions of the two ends of the locking screw 224 are opposite. The two moving blocks 222 are both sleeved on the locking screw 224 and threadedly matched with the locking screw 224. The locking screw 224 is fixedly installed at the output end of the locking motor 223. The two locking blocks 221 are both sleeved on the locking screw 224 and slidingly matched with the locking screw 224. The two locking cylinders 226 are respectively fixedly installed on the corresponding moving blocks 222 and sleeved on the locking screw 224. The middle part of the locking screw 224 is rotatably connected to a support block. One end of the two locking springs 225 is fixedly installed on both sides of the support block, and the other end of the two locking springs 225 is fixedly installed on the corresponding locking block 221.

[0052] The locking motor 223 drives the locking screw 224 to rotate, and the moving block 222 moves on the locking screw 224. The moving block 222 drives the locking cylinder 226 to move. The locking cylinder 226 moves and pushes the locking block 221 to move. The two locking blocks 221 clamp the lower end of the steering column 10. Conversely, the locking motor 223 rotates in the opposite direction, and the moving block 222 drives the locking cylinder 226 to move. The locking spring 225 resets and pushes the locking block 221 to move. The locking block 221 releases the clamping of the steering column 10.

[0053] Further, refer to Figure 1-Figure 13The limiting unit 21 also includes a fixed block 212, a supporting wedge block 213, a limiting frame 214 and two pushing wedge blocks 215. The fixed block 212 is fixedly installed on the limiting spline shaft 211. The cross-section of the fixed block 212 is a rectangular setting. The fixed block 212 is set in the limiting frame 214 and cooperates with the limiting frame 214. A fixed plate is fixedly installed on the fixed block 212. The supporting wedge block 213 is fixedly installed on the fixed plate. The two sides of the supporting wedge block 213 are inclined. The two pushing wedge blocks 215 are respectively fixedly installed on the corresponding moving blocks 222, and one end of the pushing wedge block 215 corresponding to the supporting wedge block 213 is inclined.

[0054] When the moving block 222 moves, it drives the pushing wedge block 215 to move, and the pushing wedge block 215 squeezes the supporting wedge block 213 to move, and the supporting wedge block 213 drives the fixed block 212 to move, and the fixed block 212 drives the limiting spline shaft 211 to move, and the limiting spline shaft 211 moves out of the limiting frame 214, and the limiting spline shaft 211 is inserted into the inner gear ring at the lower end of the steering column 10. The limiting spline shaft 211 can be retracted into the limiting frame 214, which is convenient for adjusting the position of the lower end of the steering column 10, so that the lower end of the steering column 10 is aligned with the limiting spline shaft 211, and then the limiting spline shaft 211 moves and extends into the inner gear ring at the lower end of the rotating column.

[0055] When the moving block 222 initially moves, the moving block 222 drives the pushing wedge block 215 to move. At this time, the moving block 222 drives the locking cylinder 226 to move. At this time, the locking cylinder 226 will not push the locking block 221 to move. When the pushing wedge block 215 moves to the plane and is released from the supporting wedge block 213, the pushing wedge block 215 will not continue to push the supporting wedge block 213 to move, so that the supporting wedge block 213 stops driving the limiting spline shaft 211 to move, first drives the limiting spline shaft 211 to move, and makes the limiting spline shaft 211 insert into the inner gear ring of the lower end of the steering column 10 and then stops, and then pushes the locking block 221 to clamp the lower end of the steering column 10.

[0056] Further, refer to Figure 1-Figure 13 The passive component 2 also includes a fixed shell 23, a locking motor 223 is fixedly mounted on the fixed shell 23, a locking screw 224 is rotatably connected to the fixed shell 23, and the limiting unit 21 also includes a connecting block 216, a connecting rod 217 and a limiting spring 218, the connecting block 216 is fixedly mounted on the fixed shell 23, the connecting rod 217 is fixedly mounted on the fixed plate, the connecting rod 217 passes through the connecting block 216 and slidably cooperates with the connecting block 216, one end of the limiting spring 218 is fixedly mounted on the fixed plate, and the other end of the limiting spring 218 is fixedly mounted on the connecting block 216.

[0057] When the moving block 222 is reset, the moving block 222 drives the pushing wedge block 215 to reset, the limiting spring 218 drives the fixed plate to move, the fixed plate drives the fixed block 212 to move, and the fixed block 212 drives the limiting spline shaft 211 to move, so that the limiting spline shaft 211 moves into the limiting frame 214.

[0058] Further, refer to Figure 1-Figure 13 The clamping assembly 3 includes two clamping blocks 31, two pushing blocks 32, a clamping motor 33, a clamping screw 34 and a clamping base 35. The clamping motor 33 is fixedly mounted on the clamping base 35. The clamping screw 34 is rotatably connected to the clamping base 35. The two pushing blocks 32 are respectively fixedly mounted on the corresponding clamping blocks 31. The two pushing blocks 32 are both slidably fitted on the clamping base 35. The thread directions at both ends of the clamping screw 34 are opposite. The clamping screw 34 is fixedly mounted on the output end of the clamping motor 33. The pushing blocks 32 are all sleeved on the clamping screw 34 and threadedly connected with the clamping screw 34.

[0059] The steering column 10 is placed between two clamping blocks 31 , the clamping motor 33 drives the clamping screw 34 to rotate, the clamping screw 34 drives the pushing block 32 to move, the pushing block 32 drives the clamping block 31 to move, and the two clamping blocks 31 clamp the steering column 10 .

[0060] It should be noted that the steering column 10 in the prior art has a shell for fixing and installing, and the clamping block 31 is clamped on the shell. When the steering column 10 to be detected does not have a shell, the steering column 10 is clamped by the clamping assembly 3, and then the upper end of the steering column 10 is fixed by the active assembly 1, and the lower end of the steering column 10 is fixed by the passive assembly 2. Then, the clamping assembly 3 needs to release the clamping of the steering column 10 to prevent interference with the detection of the steering column 10.

[0061] Further, refer to Figure 1-Figure 13 The driving unit 12 also includes a driving motor 124, a rotating plate 125 and a driving frame 126. The torque sensor 111 is fixedly mounted on the output end of the driving motor 124. The driving frame 126 is fixedly mounted on the driving rod 121. The driving motor 124 is fixedly mounted on the rotating plate 125. A connecting plate is fixedly mounted on the rotating plate 125. The driving frame 126 is rotatably connected to the connecting plate.

[0062] The driving motor 124 drives the driving rod 121 to rotate through the torque sensor 111 , the driving rod 121 drives the driving frame 126 to rotate, the driving frame 126 drives the driving inner gear ring 122 to rotate, and the driving inner gear ring 122 drives the upper end of the steering column 10 to twist.

[0063] Further, refer to Figure 1-Figure 13The driving unit 12 also includes a clamping motor 127, which is fixedly installed in the driving frame 126. The clamping screw 123 is rotatably connected to the driving frame 126. The clamping screw 123 is fixedly installed at the output end of the locking motor 223, and the driving inner gear ring 122 is fixedly installed on the driving frame 126.

[0064] The clamping motor 127 can drive the clamping screw 123 to rotate, so that the clamping screw 123 can be rotated and screwed into the screw hole at the upper end of the steering column 10, and the upper end of the steering column 10 is fixed in the driving inner gear ring 122.

[0065] Further, refer to Figure 1-Figure 13 The adjustment unit 13 includes a lifting motor 131, a lifting belt member 132, two lifting screws 133, two lifting blocks 134, a lifting plate 135 and a rotating motor 136. The lifting belt member 132 includes two transmission pulleys and a transmission belt. The two transmission pulleys are respectively fixedly mounted on the corresponding lifting screws 133. The transmission belt is connected to the two transmission pulleys. The output end of the lifting motor 131 is fixedly mounted on one of the lifting screws 133. The two lifting blocks 134 are respectively sleeved on the corresponding lifting screws 133 and are threadedly connected with the lifting screws 133. The lifting plate 135 is fixedly mounted on the two lifting blocks 134. The rotating motor 136 is fixedly mounted on the lifting plate 135. The output end of the rotating motor 136 is fixedly mounted on the rotating plate 125.

[0066] The lifting motor 131 drives a transmission pulley to rotate, and the transmission pulley rotates another transmission pulley through the transmission belt. The two transmission pulleys drive the lifting screw 133 to rotate, and the lifting block 134 moves on the lifting screw 133. The lifting block 134 drives the lifting plate 135 to move vertically, and the lifting plate 135 drives the active component 1 to move vertically. At the same time, the rotating motor 136 drives the rotating plate 125 to rotate, adjusts the angle of the active component 1, and enables the active component 1 to adapt to steering columns 10 of different lengths, with stronger adaptability.

[0067] The lower end of the steering column 10 is fixed to the passive component 2 in a horizontal state, and the upper end of the steering column 10 is fixed to the active component 1 in an inclined state. A universal joint is connected between the upper and lower ends of the steering column 10.

[0068] Further, refer to Figure 1-Figure 13The active component 1, the passive component 2 and the clamping component 3 are all installed on the workbench 4, the limit frame 214 is fixedly installed on the workbench 4, the fixed shell 23 is fixedly installed on the workbench 4, the locking block 221 passes through the workbench 4 and slides with the workbench 4, the clamping base 35 is fixedly installed on the workbench 4, the lifting screw 133 is rotatably connected to the workbench 4, the workbench 4 is fixedly installed with a working top plate 5, and the lifting motor 131 is fixedly installed on the working top plate 5.

[0069] The locking block 221 passes through the workbench 4 , so that the locking block 221 can be stable.

[0070] Further, refer to Figure 1-Figure 13 A control single chip microcomputer 7 is provided in the workbench 4, and the locking motor 223, the clamping motor 33, the pressing motor 127, the driving motor 124, the lifting motor 131, the torque sensor 111 and the angle sensor 112 are all electrically connected to the control single chip microcomputer 7. A start button 8 and a display 9 are also installed on the workbench 4, and the start button 8 and the display 9 are all electrically connected to the control single chip microcomputer 7.

[0071] The data of the torque sensor 111 and the angle sensor 112 are collected by controlling the single chip microcomputer 7 and the data are calculated.

[0072] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering column dynamic pressure bearing performance test device, comprising an active component, a passive component and a clamping component, characterized in that: The active component includes a detection unit, a driving unit and an adjustment unit. The driving unit includes a driving rod, a driving inner gear ring and a clamping screw. The driving rod can drive the driving inner gear ring and the clamping screw to rotate. The clamping screw can lock the end of the steering column on the driving inner gear ring. The detection unit includes a torque sensor and an angle sensor, and the torque sensor and the angle sensor are both installed on the driving rod; The adjustment unit can drive the detection unit and the driving unit to move vertically; The passive component includes a limit unit and a locking unit, the limit unit includes a limit spline shaft, and the locking unit includes two locking blocks and two moving blocks. When the two moving blocks move, they first drive the limit spline shaft to move in the direction of the locking block, and then drive the two locking blocks to move toward each other. The clamping assembly is capable of clamping the steering column; The limiting unit also includes a fixed block, a supporting wedge block, a limiting frame and two pushing wedge blocks. The fixed block is fixedly mounted on the limiting spline shaft. The cross-section of the fixed block is rectangular. The fixed block is arranged in the limiting frame and cooperates with the limiting frame. A fixed plate is fixedly mounted on the fixed block. The supporting wedge block is fixedly mounted on the fixed plate. Both sides of the supporting wedge block are inclined. The two pushing wedge blocks are respectively fixedly mounted on the corresponding moving blocks. One end of the pushing wedge block corresponding to the supporting wedge block is inclined.

2. A steering column dynamic pressure bearing performance testing device according to claim 1, characterized in that: The locking unit also includes a locking motor, a locking screw, two locking springs and two locking cylinders. The thread directions of the two ends of the locking screw are opposite. The two moving blocks are both sleeved on the locking screw and matched with the locking screw thread. The locking screw is fixedly installed on the output end of the locking motor. The two locking blocks are both sleeved on the locking screw and slidably matched with the locking screw. The two locking cylinders are respectively fixedly installed on the corresponding moving blocks and sleeved on the locking screw. The middle part of the locking screw is rotatably connected with a support block. One end of the two locking springs is fixedly installed on both sides of the support block, and the other end of the two locking springs is fixedly installed on the corresponding locking blocks.

3. A steering column dynamic pressure bearing performance testing device according to claim 2, characterized in that: The passive component also includes a fixed shell, the locking motor is fixedly mounted on the fixed shell, the locking screw is rotatably connected to the fixed shell, the limiting unit also includes a connecting block, a connecting rod and a limiting spring, the connecting block is fixedly mounted on the fixed shell, the connecting rod is fixedly mounted on the fixed plate, the connecting rod passes through the connecting block and slidably cooperates with the connecting block, one end of the limiting spring is fixedly mounted on the fixed plate, and the other end of the limiting spring is fixedly mounted on the connecting block.

4. A steering column dynamic pressure bearing performance testing device according to claim 3, characterized in that: The clamping assembly includes two clamping blocks, two pushing blocks, a clamping motor, a clamping screw and a clamping base. The clamping motor is fixedly mounted on the clamping base, and the clamping screw is rotatably connected to the clamping base. The two pushing blocks are respectively fixedly mounted on the corresponding clamping blocks. Both pushing blocks are slidably fitted on the clamping base. The thread directions of the two ends of the clamping screw are opposite. The clamping screw is fixedly mounted on the output end of the clamping motor. The pushing blocks are sleeved on the clamping screw and threadedly connected to the clamping screw.

5. The dynamic pressure bearing performance testing device for a steering column according to claim 4, characterized in that: The driving unit also includes a driving motor, a rotating plate and a driving frame. The torque sensor is fixedly mounted on the output end of the driving motor. The driving frame is fixedly mounted on the driving rod. The driving motor is fixedly mounted on the rotating plate. A connecting plate is fixedly mounted on the rotating plate. The driving frame is rotatably connected to the connecting plate.

6. The steering column dynamic pressure bearing performance testing device according to claim 5, characterized in that: The driving unit also includes a clamping motor, which is fixedly installed in the driving frame. The clamping screw is rotatably connected to the driving frame. The clamping screw is fixedly installed at the output end of the locking motor, and the driving inner gear ring is fixedly installed on the driving frame.

7. The steering column dynamic pressure bearing performance testing device according to claim 5, characterized in that: The adjustment unit includes a lifting motor, a lifting belt member, two lifting screws, two lifting blocks, a lifting plate and a rotating motor. The lifting belt member includes two transmission pulleys and a transmission belt. The two transmission pulleys are respectively fixedly mounted on the corresponding lifting screws. The transmission belt is connected to the two transmission pulleys. The output end of the lifting motor is fixedly mounted on one of the lifting screws. The two lifting blocks are respectively sleeved on the corresponding lifting screws and are threadedly connected to the lifting screws. The lifting plate is fixedly mounted on the two lifting blocks. The rotating motor is fixedly mounted on the lifting plate. The output end of the rotating motor is fixedly mounted on the rotating plate.

8. The steering column dynamic pressure bearing performance testing device according to claim 7, characterized in that: The active component, passive component and clamping component are all installed on the workbench, the limit frame is fixedly installed on the workbench, the fixed shell is fixedly installed on the workbench, the locking block passes through the workbench and slides with the workbench, the clamping base is fixedly installed on the workbench, the lifting screw is rotatably connected to the workbench, a working top plate is fixedly installed on the workbench, and the lifting motor is fixedly installed on the working top plate.

9. The steering column dynamic pressure bearing performance testing device according to claim 8, characterized in that: A control single chip microcomputer is arranged in the workbench, and the locking motor, clamping motor, pressing motor, driving motor, lifting motor, torque sensor and angle sensor are all electrically connected to the control single chip microcomputer. A start button and a display are also installed on the workbench, and the start button and the display are all electrically connected to the control single chip microcomputer.

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