A shaftless calibration final inspection bench for steering sensors

Abstract

This invention relates to a shaftless calibration final inspection bench for steering sensors, belonging to the field of sensor final inspection technology. It includes a main body, a centering component at one end of a base, a tensioning component inside the base, and a leveling component at the other end of the base. A pressure plate is fixed to one end of the leveling component. An adjusting component is located inside the tensioning component, and an abutment block is fixed to one side of the adjusting component. This invention employs a transmission design using a turntable with an equal-angle hinged pull plate, a track-type moving seat, and a lifting rod with limiting cooperation. Multiple sets of moving seats symmetrically and with equal force converge, forcibly constraining the coaxiality of the outer rotor from the outside. Simultaneously, a radial transmission mechanism composed of a lead screw, push plate, moving block, and rubber abutment block drives the abutment block radially outward to support the hollow inner rotor via a lead screw thread transmission. The inner support tensioning structure directly fixes the hollow inner rotor, completing calibration without assembling a customer input shaft. This breaks the shaft system limitations of traditional calibration, significantly improving versatility and adaptability.

Description

Technical Field

[0001] This invention relates to the field of sensor final inspection technology, specifically to a shaftless calibration final inspection bench for steering sensors. Background Technology

[0002] The signal generation of the steering sensor depends on the relative position of the input shaft and the output shaft. Therefore, when used by the customer, the input shaft, torsion bar, and output shaft need to be assembled and calibrated so that the output signal in the current assembly state meets the torque signal output value of zero torque state within 50%±0.5%. However, before delivery to the customer, the product must be inspected in the final stage. Using only electrical parameters as the basis for qualified products cannot fully meet the customer's requirements. Therefore, the inner rotor of the sensor is rotated at the same time as the outer rotor at the output shaft end of the sensor to achieve calibration and measurement.

[0003] However, the inner rotor of the steering sensor is a hollow structure, and the existing calibration relies on the customer's input shaft and the use of the customer's shaft. At the same time, there is an assembly gap between the outer rotor of the sensor and the housing, and manual placement is prone to tilting. If the sensor is not placed horizontally, it will cause the rotation tilt angle, introducing additional measurement errors. It must be leveled synchronously. Moreover, the hole diameter, wall thickness and material of the inner rotor are different for different models, and the clamps for a single inner rotor cannot be universal. If the tension force is too large, it will cause the inner rotor to expand and crack, and if it is too small, it will cause slippage and asynchronous rotation.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing shaftless calibration final inspection bench for steering sensors. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a shaftless calibration final inspection bench for steering sensors to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a steering sensor shaftless calibration final inspection stand, comprising a main body, a detection device for detecting the sensor is provided inside the main body, a placement platform for placing the sensor is provided inside the main body, a fixed seat is provided at a protruding position inside the main body, a base is fixed inside the fixed seat, a centering component is provided at one end of the base, and the centering component positions the outer rotor of the sensor, a tensioning component is provided inside the base, and the outer rotor clamps the inner rotor of the sensor, a connecting seat is fixed to the base, a leveling component is provided at the other end of the base, a pressure plate is fixed at one end of the leveling component, and the leveling component drives the pressure plate to move so that the sensor is horizontally placed on the top of the placement platform, an adjustment component is provided inside the tensioning component, a stop block is fixed on one side of the adjustment component, and the tensioning force of the stop block on the sensor is adjusted by the adjustment component.

[0007] Preferably, the centering component includes a rotating shaft disposed within a base, a motor fixed to one end of the rotating shaft, a turntable fixed to the outer wall of the rotating shaft, a plurality of pull plates hinged at equal angles to one end of the turntable, a movable seat hinged to the other side of the pull plates, and a track provided on the base to cooperate with the sliding of the movable seat.

[0008] Preferably, the tensioning assembly includes a lead screw fixed to one end of a rotating shaft, a slide rod connected to the outer wall of the lead screw by a thread, a movable column fixed to one end of the slide rod, a plurality of push plates hinged at equal angles to the outer wall of the movable column, and a movable block hinged to the other side of the push plate.

[0009] Preferably, the slide rod passes through the connecting seat and is slidably connected to the connecting seat, the movable column is sleeved on the outer wall of the protruding position of the connecting seat, and the connecting seat has a cavity that cooperates with the movable column, the push plate and the movable block.

[0010] Preferably, the movable block is slidably connected to the connecting seat, and the movable block has a cavity that cooperates with the movement of the abutment block. The movable block and the abutment block are slidably connected.

[0011] Preferably, the leveling component includes a rotating ring disposed within a fixed base, a gear ring fixed to the outer wall of the rotating ring, the gear ring meshing with a gear, a roller slidably connected to an inclined surface disposed at the protruding position of the rotating ring, a lifting frame rotatably connected to the roller, a lifting rod slidably connected to the lifting frame, a compression spring disposed between the lifting rod and the pressure plate, and a return spring disposed between the lifting frame and the protruding position of the fixed base.

[0012] Preferably, the lifting rod passes through the movable seat and is slidably connected to the movable seat. The lifting rod passes through the base, and the track provided on the base has a cavity that accommodates the sliding of the lifting rod.

[0013] Preferably, one end of the compression spring is fixedly connected to the lifting rod, the other end of the compression spring is fixedly connected to the pressure plate, and the pressure plate is slidably connected to the movable seat.

[0014] Preferably, the adjustment assembly includes a telescopic movable frame fixed to the outer wall of the lifting rod, with multiple inclined blocks evenly arranged on one side of the telescopic movable frame, a push block slidably connected to one side of the inclined block, and a push block fixedly connected to a contact block on one side.

[0015] Preferably, the contact surfaces of the inclined block and the push block are both inclined surfaces, the telescopic movable frame is slidably connected to the movable block, and the movable block has a cavity that cooperates with the sliding of the telescopic movable frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a transmission design that combines a turntable with an equal-angle hinged pull plate, a track-type moving seat, and a lifting rod for limiting. The turntable rotation drives the pull plate to move multiple moving seats synchronously along the base track, resulting in symmetrical and uniform radial force distribution and no off-center loading. This externally constrains the coaxiality of the outer rotor. Simultaneously, a radial transmission mechanism composed of a lead screw, slide bar, moving column, push plate, moving block, and rubber contact block drives the contact block to radially support the hollow inner rotor. The internal support clamping mechanism adapts to the sensor's hollow thin-walled structure, eliminating external clamping interference and deformation. The centering reference is pure and precise. The internal support tensioning structure directly fixes the hollow inner rotor, eliminating the need for customer input shafts, torsion bars, and output shafts for calibration. The calibration parameters reflect only the sensor's inherent characteristics, and the compensation parameters are widely adaptable to different customer shaft models, breaking the limitations of traditional calibration shaft systems and significantly improving versatility and adaptability.

[0017] 2. This invention integrates gears, a gear ring, a sloping rotating ring, rollers, a lifting frame, a return spring, a lifting rod, a compression spring, and a pressure plate. The sloping rotating ring drives the rollers to rise and fall, causing the lifting rod and pressure plate to press down synchronously. The centering and pressing actions are mechanically linked, and with the help of elastic buffering, adaptive clamping is achieved, without overpressure, compression gaps, or secondary deviations. The centering and pressing are completed synchronously, quickly calibrating the sensor to a level state that is completely in contact with the placement platform. This solves problems such as manual placement deviation, assembly gaps in the outer rotor housing, and rotation tilt angles, eliminating additional errors introduced by the installation posture. It maximizes the clamping consistency of batch calibration, and the outer rotor is centered with equal force in the circumference, while the inner rotor is centered with internal support and synchronous pressing to form triple centering, forcing the inner and outer rotors to maintain absolute coaxiality. This eliminates the problems of asynchronous rotation, angle difference, and cumulative error in traditional calibration from the root, and the measurement data is free from eccentric distortion, resulting in a qualitative improvement in calibration accuracy.

[0018] 3. The present invention consists of a retractable movable frame, an inclined block, a push block, and an abutment block, forming a motion conversion mechanism that converts the vertical lifting motion of the lifting rod into the horizontal motion of the push block. The tension force is adjusted by changing the contact thickness between the abutment block and the inner rotor. The position of the pressure plate, the centering stroke, and the tension force can all be adaptively adjusted. It can be adapted to steering sensors with different inner hole diameters, shell sizes, wall thicknesses, and materials without changing tooling, which greatly reduces equipment investment, changeover time, and tooling costs, and improves production line flexibility and production efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural diagram showing the connection between the main body of the invention and the fixed base; Figure 3 This is a three-dimensional structural schematic diagram of the tensioning component of the present invention; Figure 4This is a three-dimensional structural diagram of the centering component of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the centering component of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the tensioning component from another perspective of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the tensioning component of the present invention; Figure 8 This is a three-dimensional structural diagram of the adjustment component of the present invention.

[0020] In the diagram: 1. Main body; 2. Detection device; 3. Placement platform; 4. Fixed base; 5. Base; 601. Rotating shaft; 602. Turntable; 603. Pull plate; 604. Moving base; 701. Lead screw; 702. Slide rod; 703. Moving column; 704. Push plate; 705. Moving block; 8. Connecting base; 901. Rotating ring; 902. Roller; 903. Lifting frame; 904. Lifting rod; 905. Compression spring; 906. Return spring; 10. Pressure plate; 111. Telescopic moving frame; 112. Inclined block; 113. Push block; 12. Abutment block. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Please see Figures 1 to 8 This invention provides a technical solution: a steering sensor shaftless calibration final inspection stand, including a main body 1, a detection device 2 for detecting the sensor is provided inside the main body 1, a placement platform 3 for placing the sensor is provided inside the main body 1, a fixed seat 4 is provided at a protruding position inside the main body 1, a base 5 is fixed inside the fixed seat 4, a centering component is provided at one end of the base 5, and the centering component positions the outer rotor of the sensor through the centering component, a tensioning component is provided inside the base 5, and the outer rotor clamps the inner rotor of the sensor through the tensioning component, a connecting seat 8 is fixed to the base 5, a leveling component is provided at the other end of the base 5, a pressure plate 10 is fixed at one end of the leveling component, and the leveling component drives the pressure plate 10 to move so that the sensor is horizontally placed on the top of the placement platform 3, an adjustment component is provided inside the tensioning component, a contact block 12 is fixed on one side of the adjustment component, and the tensioning force of the contact block 12 on the sensor is adjusted by the adjustment component.

[0023] In specific implementation, the steering sensor shaftless calibration final inspection stand is based on the main body 1, and has a detection device 2 and a placement platform 3 for placing the sensor inside. The fixed seat 4 inside the main body 1 is fixed with a base 5. One end of the base 5 is equipped with a centering component for positioning the outer rotor of the sensor. At the same time, the base 5 is equipped with a tensioning component for clamping the inner rotor of the sensor. The base 5 is fixed with a connecting seat 8, and the other end is equipped with a leveling component. The end of the leveling component is fixed with a pressure plate 10, which can drive the pressure plate 10 to move and level the sensor smoothly on the top of the placement platform 3. The tensioning component is equipped with an adjustment component. One side of the adjustment component is fixed with a contact block 12. The tensioning force of the contact block 12 on the inner rotor of the sensor can be changed by adjusting the component, thereby completing the positioning, clamping, leveling and tensioning force adjustment of the sensor, realizing shaftless calibration and final inspection.

[0024] As a further embodiment of the present invention, the centering component includes a rotating shaft 601 disposed in the base 5, a motor is fixed to one end of the rotating shaft 601, a turntable 602 is fixed to the outer wall of the rotating shaft 601, a plurality of pull plates 603 are hinged at equal angles to one end of the turntable 602, a movable seat 604 is hinged to the other side of the pull plate 603, and the base 5 is provided with a track that slides in coordination with the movable seat 604.

[0025] In practice, the rotating shaft 601 inside the base 5 is driven by a motor to rotate. The rotating shaft 601 drives the turntable 602 on the outer wall to rotate synchronously. Multiple pull plates 603 hinged at equal angles on the turntable 602 move together, thereby pulling the movable seat 604 hinged to the pull plate 603 to slide along the preset track of the base 5, so as to achieve the centripetal centering positioning of the outer rotor of the sensor.

[0026] As a further embodiment of the present invention, the tensioning assembly includes a lead screw 701 fixed to one end of a rotating shaft 601, a slide rod 702 connected to the outer wall of the lead screw 701 by a thread, a movable column 703 fixed to one end of the slide rod 702, a plurality of push plates 704 hinged at equal angles to the outer wall of the movable column 703, and a movable block 705 hinged to the other side of the push plate 704.

[0027] In specific implementation, the rotating shaft 601 drives the lead screw 701 fixed thereto to rotate. The lead screw 701 drives the slide bar 702 on the outer wall to move through the threaded transmission. The slide bar 702 drives the moving column 703 fixed at one end to move, which in turn causes multiple push plates 704 hinged at equal angles on the outer wall of the moving column 703 to swing. The push plates 704 then drive the moving block 705 hinged thereto to move, thereby realizing the tensioning drive of the inner rotor.

[0028] As a further embodiment of the present invention, the slide rod 702 passes through the connecting seat 8, and the slide rod 702 and the connecting seat 8 are slidably connected. The moving column 703 is sleeved on the outer wall of the protruding position of the connecting seat 8, and the connecting seat 8 has a cavity that cooperates with the moving column 703, the push plate 704 and the moving block 705.

[0029] In practice, the slide rod 702 passes through the connecting seat 8 and slides with it in a limiting manner. The moving column 703 is sleeved on the outer wall of the protruding part of the connecting seat 8. The connecting seat 8 has a cavity inside which the moving column 703, the push plate 704 and the moving block 705 can move, providing space and guidance for the movement of each component.

[0030] As a further embodiment of the present invention, the movable block 705 is slidably connected to the connecting seat 8, and the movable block 705 has a cavity that cooperates with the movement of the abutment block 12. The movable block 705 and the abutment block 12 are slidably connected.

[0031] In practice, the movable block 705 and the connecting seat 8 maintain a limited sliding fit. The movable block 705 has a cavity inside that allows the abutment block 12 to move. At the same time, the movable block 705 and the abutment block 12 are also limited sliding connected, providing stable guidance and movement space for the abutment block 12.

[0032] As a further embodiment of the present invention, the leveling component includes a rotating ring 901 disposed in the fixed base 4. A gear ring is fixed on the outer wall of the rotating ring 901, and a gear meshes with the gear ring. A roller 902 is slidably connected to the inclined surface disposed at the protruding position of the rotating ring 901. A lifting frame 903 is rotatably connected to the roller 902. A lifting rod 904 is slidably connected to the lifting frame 903. A compression spring 905 is disposed between the lifting rod 904 and the pressure plate 10. A return spring 906 is disposed between the lifting frame 903 and the protruding position of the fixed base 4.

[0033] In specific implementation, the rotating ring 901 inside the fixed seat 4 is driven to rotate by meshing with the gear on the outer wall. The inclined surface of the protruding position of the rotating ring 901 slides with the roller 902, which drives the lifting frame 903, which is rotatably connected to the roller 902, to move. The lifting frame 903 and the lifting rod 904 are in a limited sliding fit. A compression spring 905 is provided between the lifting rod 904 and the pressure plate 10, and a return spring 906 is provided between the lifting frame 903 and the protruding position of the fixed seat 4, thereby realizing lifting drive and elastic return, and driving the pressure plate 10 to complete the leveling and pressing of the sensor.

[0034] As a further embodiment of the present invention, the lifting rod 904 passes through the movable seat 604, and the lifting rod 904 and the movable seat 604 are slidably connected. The lifting rod 904 passes through the base 5, and the track provided on the base 5 has a cavity that cooperates with the sliding of the lifting rod 904.

[0035] In practice, the lifting rod 904 passes through the movable seat 604 and is slidably connected to it. At the same time, the lifting rod 904 also passes through the base 5. A cavity is provided on the track of the base 5 for the lifting rod 904 to slide, providing guidance and movement space for the lifting rod 904, so as to realize the linkage and cooperation with the movable seat 604 and the base 5.

[0036] As a further embodiment of the present invention, one end of the compression spring 905 is fixedly connected to the lifting rod 904, the other end of the compression spring 905 is fixedly connected to the pressure plate 10, and the pressure plate 10 is slidably connected to the movable seat 604.

[0037] In specific implementation, one end of the compression spring 905 is fixedly connected to the lifting rod 904, and the other end is fixedly connected to the pressure plate 10. At the same time, the pressure plate 10 and the movable seat 604 maintain a limited sliding connection, so that the pressure plate 10 can elastically rise and fall on the movable seat 604 to achieve adaptive pressing and leveling of the sensor.

[0038] As a further embodiment of the present invention, the adjustment component includes a retractable movable frame 111 fixed to the outer wall of the lifting rod 904. A plurality of inclined blocks 112 are arranged at equal intervals on one side of the retractable movable frame 111. A push block 113 is slidably connected to one side of the inclined block 112. One side of the push block 113 is fixedly connected to the abutment block 12.

[0039] In specific implementation, the telescopic movable frame 111 fixed to the outer wall of the lifting rod 904 moves synchronously with the lifting rod 904. The telescopic movable frame 111 drives multiple inclined blocks 112 arranged at equal intervals on one side to move. The inclined blocks 112 drive the push block 113 slidably connected to them to move. The push block 113 then drives the abutment block 12 fixed to it to move, thereby realizing the linkage adjustment of the tension force.

[0040] As a further embodiment of the present invention, the contact surfaces of the inclined block 112 and the push block 113 are both inclined surfaces, the telescopic movable frame 111 is slidably connected to the movable block 705, and the movable block 705 has a cavity that cooperates with the sliding of the telescopic movable frame 111.

[0041] In specific implementation, the contact surfaces of the inclined block 112 and the push block 113 are both inclined surfaces. The telescopic movable frame 111 is slidably connected to the movable block 705, and the movable block 705 has a cavity for the telescopic movable frame 111 to slide, so that the vertical movement of the inclined block 112 can be converted into the horizontal movement of the push block 113 through the inclined surface cooperation, while providing a suitable activity space for the telescopic movable frame 111.

[0042] Working principle: When using the shaftless calibration final inspection stand for this steering sensor, the steering sensor is placed stably on the top of the placement table 3. After the control system is started, the drive mechanism drives the fixed base 4 to sink vertically. The base 5 fixed inside the fixed base 4 then moves down to the sensor calibration station, completing the initial alignment of the mechanism and the workpiece, completing the pre-positioning of the mechanism, avoiding direct impact on the sensor, ensuring the initial clamping stability, eliminating the positional offset caused by the start and stop of the mechanism, and laying a stable foundation for subsequent centering, tensioning, and leveling. Next, the motor is started, which drives the rotating shaft 601 to rotate, which in turn drives the turntable 602 fixed on its outer wall to rotate synchronously. The rotating turntable 602 drives the multiple pull plates 603 that are hinged at equal angles to rotate, so that the movable seat 604 hinged to the pull plates 603 slides on the track set on the base 5. Since the lifting rod 904 and the movable seat 604 are connected in a limited sliding manner, when the movable seat 604 moves inward, it drives the lifting rod 904 to slide horizontally within the lifting frame 903. Through multiple sets of inwardly retracting movable seats 604, the sensor's outer rotor is automatically centered with equal force in the circumferential direction. The sensor's outer rotor is prone to radial eccentricity due to placement deviation. Fixing only the inner rotor cannot guarantee that the inner and outer rotors are coaxial. Multi-directional synchronous equal force centering forces the outer rotor and the inner rotor to keep concentric, eliminating the problem of misalignment and angle difference of the calibrated rotors. When the rotating shaft 601 rotates, it simultaneously drives the lead screw 701 fixed to it to rotate synchronously. Since the lead screw 701 and the slide rod 702 are connected by threads, and the slide rod 702 is slidably connected to the connecting seat 8, the rotation of the lead screw 701 drives the slide rod 702 to slide within the connecting seat 8. The slide rod 702 is fixedly connected to the moving column 703, which is sleeved on the outer wall of the protruding part of the connecting seat 8. Thus, the movement of the slide rod 702 drives the moving column 703 to move within the connecting seat 8, thereby driving the moving column... Multiple push plates 704 hinged to the outer wall of 703 rotate, causing the movable block 705 hinged to the push plate 704 to slide within the connecting seat 8. Finally, the movable block 705 drives the internal contact block 12 to radially outward, completing the tensioning and fixing of the sensor's inner rotor. The inner rotor is a hollow thin-walled structure, and the internal support tensioning eliminates the risk of external clamping deformation. At the same time, it replaces the customer's shaft to achieve shaftless fixing. The inner rotor is subjected to uniform force without deformation, and the centering reference is accurate. There is no slippage or lateral movement during rotation, achieving stable drive under shaftless working conditions. When the rotating shaft 601 rotates, the gear is activated by the controller. The gear ring meshing with the gear drives the rotating ring 901 to rotate. The contact surface between the rotating ring 901 and the roller 902 is inclined. When the rotating ring 901 rotates, the inclined surface at its protruding position drives the roller 902 to rise and fall inside the fixed seat 4, thereby driving the lifting frame 903, which is hinged to the roller 902, to rise and fall synchronously. During this process, the return spring 906 between the lifting frame 903 and the fixed seat 4 is stretched. The elastic force of the return spring 906 stabilizes the movement posture of the lifting frame 903. The rise and fall of the lifting frame 903 drives the lifting rod 904, which is slidably connected to its limit, to rise and fall synchronously. Since the lifting rod 904 passes through the moving seat 604, the pressure plate 10 is driven to slide along the side wall of the moving seat 604 by the compression spring 905. The pressure plate 10 adapts to different sensor specifications, so that the position of the pressure plate 10 will not be compressed empty, compressed off-center, or cracked by over-pressure. Multiple sets of pressure plates 10 distributed at equal angles synchronously press down on the sensor, calibrating the sensor to be aligned with the placement platform 3. The horizontal alignment, centering and pressing are completed simultaneously to quickly level the sensor, eliminate tilting errors caused by installation and placement, further ensure the coaxiality of the inner and outer rotors, and make the calibration data more consistent with the true characteristics of the sensor. When the lifting rod 904 moves, it drives the telescopic movable frame 111 fixed on the outer wall to move synchronously. The telescopic movable frame 111 adapts to the lifting action by stretching or compressing without interfering with the independent movement of each mechanism. Since the contact surface between the inclined block 112 and the push block 113 is inclined, the inclined block 112 drives the inclined block 112 fixed to it to slide on one side of the push block 113. This allows the vertical movement of the inclined block 112 to drive the push block 113 to move horizontally. The horizontally moving push block 113 drives the abutment block 12 to slide inside the moving block 705. By changing the contact thickness between the abutment block 12 (rubber material) and the inner rotor, the tension force of the inner rotor is precisely adjusted. The tension force adapts to match the workpiece, which avoids the inner rotor being damaged and the coaxiality being destroyed by excessive tension force, and also prevents the rotation slippage and torque distortion caused by insufficient tension force. It is compatible with the calibration of multiple sensor models. After static calibration, the sensor torque output in the current zero torque state is set to 50%. Dynamic calibration and PCB compensation are performed. The inner and outer rotors are rotated 360° coaxially. The output value of the torque signal is measured and recorded by the detection device 2 set inside the main body 1 and transmitted to the compensation function of the host computer software. Then, the above steps are repeated in the reverse direction for final inspection.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A shaftless calibration final inspection stand for a steering sensor, comprising a main body (1), characterized in that: The main body (1) is provided with a detection device (2) for detecting the sensor. The main body (1) is provided with a placement platform (3) for placing the sensor. The main body (1) is provided with a fixed seat (4) at a protruding position. The fixed seat (4) is fixed with a base (5). One end of the base (5) is provided with a centering component, which positions the outer rotor of the sensor. The base (5) is provided with a tensioning component, which clamps the inner rotor of the sensor through the outer rotor. The base (5) is fixed with a connecting seat (8). The other end of the base (5) is provided with a leveling component. One end of the leveling component is fixed with a pressure plate (10), which moves the pressure plate (10) so that the sensor is placed horizontally on the top of the placement platform (3). The tensioning component is provided with an adjustment component. One side of the adjustment component is fixed with an abutment block (12), which adjusts the tensioning force of the abutment block (12) on the sensor.

2. The steering sensor shaftless calibration final inspection bench according to claim 1, characterized in that: The centering component includes a rotating shaft (601) disposed in the base (5). A motor is fixed to one end of the rotating shaft (601), and a turntable (602) is fixed to the outer wall of the rotating shaft (601). Multiple pull plates (603) are hinged at equal angles to one end of the turntable (602), and a movable seat (604) is hinged to the other side of the pull plate (603). The base (5) is provided with a track that slides in coordination with the movable seat (604).

3. The steering sensor shaftless calibration final inspection stand according to claim 2, characterized in that: The tensioning assembly includes a lead screw (701) fixed to one end of a rotating shaft (601), a slide rod (702) connected to the outer wall of the lead screw (701) by a thread, a movable column (703) fixed to one end of the slide rod (702), a plurality of push plates (704) hinged at equal angles to the outer wall of the movable column (703), and a movable block (705) hinged to the other side of the push plate (704).

4. The steering sensor shaftless calibration final inspection stand according to claim 3, characterized in that: The slide rod (702) passes through the connecting seat (8), and the slide rod (702) and the connecting seat (8) are connected in a limited sliding manner. The moving column (703) is sleeved on the outer wall of the protruding position of the connecting seat (8). The connecting seat (8) has a cavity that cooperates with the moving column (703), the push plate (704) and the moving block (705).

5. The steering sensor shaftless calibration final inspection stand according to claim 3, characterized in that: The movable block (705) is slidably connected to the connecting seat (8), and the movable block (705) has a cavity that cooperates with the movement of the abutment block (12). The movable block (705) and the abutment block (12) are slidably connected.

6. The steering sensor shaftless calibration final inspection bench according to claim 1, characterized in that: The leveling assembly includes a rotating ring (901) disposed in the fixed base (4). A gear ring is fixed on the outer wall of the rotating ring (901), and the gear ring meshes with a gear. A roller (902) is slidably connected to the inclined surface provided at the protruding position of the rotating ring (901). A lifting frame (903) is rotatably connected to the roller (902). A lifting rod (904) is slidably connected to the lifting frame (903). A compression spring (905) is provided between the lifting rod (904) and the pressure plate (10). A return spring (906) is provided between the lifting frame (903) and the protruding position of the fixed base (4).

7. A steering sensor shaftless calibration final inspection bench according to claim 6, characterized in that: The lifting rod (904) passes through the movable seat (604), and the lifting rod (904) and the movable seat (604) are connected in a limited sliding connection. The lifting rod (904) passes through the base (5), and the track provided on the base (5) has a cavity that cooperates with the sliding of the lifting rod (904).

8. A steering sensor shaftless calibration final inspection stand according to claim 6, characterized in that: One end of the compression spring (905) is fixedly connected to the lifting rod (904), and the other end of the compression spring (905) is fixedly connected to the pressure plate (10). The pressure plate (10) is slidably connected to the movable seat (604).

9. A shaftless calibration final inspection stand for a steering sensor according to claim 6, characterized in that: The adjustment assembly includes a retractable movable frame (111) fixed to the outer wall of the lifting rod (904). Multiple inclined blocks (112) are arranged at equal intervals on one side of the retractable movable frame (111). A push block (113) is slidably connected to one side of the inclined block (112). One side of the push block (113) is fixedly connected to the abutment block (12).

10. A shaftless calibration final inspection bench for a steering sensor according to claim 9, characterized in that: The contact surfaces of the inclined block (112) and the push block (113) are both inclined surfaces. The telescopic movable frame (111) is slidably connected to the movable block (705), and the movable block (705) has a cavity that cooperates with the telescopic movable frame (111) to slide.

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