Positioning calibration tool of torque sensor
By designing an automated torque sensor positioning and calibration tool, the precise positioning and rotation of the stator and rotor is achieved by using lifting devices and driving motors, the problem of errors easily caused by manual calibration is solved and the reliability and production efficiency of the sensor are improved.
Patent Information
- Application Number
- CN202421677702.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the prior art, manual calibration torque sensors are prone to errors, resulting in the direction of the sensor opposite to the actual direction, causing the reverse direction to assist and scrap.
A torque sensor positioning calibration tool including a bracket, a positioning plate, a lifting device and a drive motor is designed to accurately position and rotate the stator and rotor through an automated lifting device and a drive motor to reduce manual operation errors.
Through the automated calibration process, the error caused by human operation is reduced, the reliability and stability of the sensor is improved, and labor costs and production time are reduced.
Smart Images
Figure CN222964795U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of torque sensor manufacturing, in particular to a positioning and calibration tooling for a torque sensor. Background Art
[0002] The torque sensor adopts the Hall principle to realize the electric power assist function of the vehicle steering system. Therefore, strict requirements are imposed on the alignment positions of the magnetic poles of the rotor and the toothed ring of the stator. In the prior art, usually, an operator operates a calibration device to rotate the rotor to make the magnetic poles of the rotor correspond to the toothed ring of the stator, and then the calibration is carried out through the calibration device. During the calibration process, if the operator is a little inattentive, the magnetic field of the rotor may be calibrated between the wrong toothed rings, causing the direction of the torque sensor to be opposite to the actual direction, resulting in reverse power assist and scrapping. Content of the Utility Model
[0003] The utility model provides a positioning and calibration tooling for a torque sensor, which solves the problem of easy error caused by manual calibration in the prior art.
[0004] The technical solution of the utility model is realized as follows:
[0005] A positioning and calibration tooling for a torque sensor includes a bracket. A positioning plate is arranged on the bracket. The positioning plate can fix a housing. A stator rotates inside the housing. A positioning hole is penetrated through the positioning plate. The positioning hole corresponds to the small end of the stator. A first positioning groove is arranged at the bottom end of the stator. The stator can accommodate a rotor. A second positioning groove is arranged at the top end of the rotor. A lower positioning tooling is arranged below the positioning hole. A lifting device is arranged above the bracket. An upper positioning tooling is fixed at the bottom end of the lifting device. The lower positioning tooling can be clamped with the first positioning groove, and the upper positioning tooling can be clamped with the second positioning groove. Both the lower positioning tooling and the upper positioning tooling rotate through drive motors.
[0006] Further, the lower positioning tooling and the upper positioning tooling have the same structure, and both include a rotating disk. A positioning bin is arranged inside the rotating disk. A spring telescopic rod is arranged inside the positioning bin. The telescopic end of the spring telescopic rod can penetrate through the positioning bin and be placed inside the first positioning groove or the second positioning groove. A pressure sensor is arranged between the spring telescopic rod and the rotating disk. By arranging the spring telescopic rod and the pressure sensor, automatic positioning of the stator and the rotor is realized, the manual operation links are reduced, and the labor cost is lowered.
[0007] Further, a clamping jaw is arranged on the lifting device. The lifting device slides along a driving frame through a linear motor group. The driving frame enables the lifting device to pass through a conveyor belt, a magnetization device and the bracket in sequence. By driving the lifting device and the clamping jaw through the linear motor group, rapid and accurate grasping and moving of the rotor are realized, the manual operation time and labor intensity are reduced, and the overall production efficiency is improved.
[0008] Further, the lifting device includes a driving telescopic rod. A baffle is circumferentially fixed on the driving telescopic rod. An isosceles trapezoidal telescopic block is fixed at the telescopic end of the driving telescopic rod. The large end of the telescopic block is close to the positioning plate. A limiting plate is slidably mounted on the side wall of the telescopic end of the driving telescopic rod. A sliding rod is fixed at the top end of the limiting plate. The other end of the sliding rod penetrates through the baffle, and a limiting block is fixed at the end of the sliding rod that penetrates through the baffle. A vertical plate is provided on one side of the limiting plate. A horizontal slideway is provided on the side of the vertical plate close to the telescopic block. Clamping blocks are slidably connected to both inclined sides of the telescopic block. The side walls of the clamping blocks are slidably connected to the vertical plate through the horizontal slideway. An arc plate is fixed at the bottom end of the clamping block. The arc plates correspond to form clamping claws. During the process of clamping the rotor, only by controlling the telescoping of the driving telescopic rod can the opening and closing and lifting of the clamping claws be realized, reducing the number of driving devices and simplifying the equipment structure.
[0009] Further, a chute is provided in the radial direction of the rotating disk. The chute is fixedly and slidably connected to the positioning bin. By providing the chute in the radial direction of the rotating disk, the positioning bin is allowed to freely slide in the chute, so as to adjust its position, and thus can adapt to stators and rotors of different radius specifications.
[0010] Further, a plurality of screw holes are provided on the positioning plate. Studs are screwed into the screw holes. Sleeves are screwed onto the studs. The sleeves abut against the side wall of the housing. By means of the studs, sleeves of different diameters can be replaced, and then the position of the housing can be finely adjusted. The operation is simple and intuitive, facilitating quick replacement and setting.
[0011] The beneficial effects that can be produced by this technical solution.
[0012] By means of the automatic lifting device and the driving motor of the present utility model, the stator and the rotor can be accurately positioned and rotated, realizing an automatic calibration process, which helps to reduce the errors caused by manual operation and improve the reliability and stability of the sensor. The driving motor can not only drive the rotor to rotate, but also apply a known torque value to the rotor, providing an accurate reference for calibration. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;
[0015] Figure 2 It is a three-dimensional structural schematic diagram of the bracket of the present utility model;
[0016] Figure 3 Is a sectional isometric schematic view of the lifting device of the present utility model;
[0017] Figure 4 Is a three-dimensional structure schematic view of the positioning plate of the present utility model;
[0018] Figure 5 Is a sectional isometric schematic view of the lower positioning tooling of the present utility model;
[0019] Figure 6 Is Figure 5 The partial enlarged schematic view at position A in
[0020] Wherein: 1. Bracket, 2. Positioning plate, 3. Housing, 4. Stator, 6. First positioning groove, 7. Rotor, 8. Second positioning groove, 9. Lower positioning tooling, 10. Lifting device, 11. Upper positioning tooling, 12. Driving motor, 13. Rotating disc, 14. Positioning bin, 15. Claw, 16. Driving frame, 17. Linear motor group, 18. Conveyor belt, 19. Magnetizing device, 20. Baffle, 21. Telescopic block, 22. Limiting plate, 23. Sliding rod, 24. Limiting block, 25. Vertical plate, 26. Horizontal slideway, 27. Clamping block, 28. Arc plate, 29. Chute, 30. Screw hole, 31. Sleeve, 32. Spring telescopic rod, 33. Driving telescopic rod. Specific embodiments
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] As Figure 1-2 As shown in FIGS.
[0023] During the production and manufacturing process, the rotor 7 and the stator 4 are respectively assembled and produced through a unified mold, reducing the errors in the production process and improving the product quality. This makes the positions of the first positioning groove 6 and the second positioning groove 8 unified. During use, the upper positioning tooling 11 is clamped with the second positioning groove 8, and the housing 3 and the stator 4 are fixed through the positioning plate 2 and the positioning holes. Through the clamping of the lower positioning tooling 9 and the first positioning groove 6, and the clamping of the upper positioning tooling 11 and the second positioning groove 8, after mutual clamping, the driving motor 12 is started. The driving motor 12 drives the first positioning groove 6 and the second positioning groove 8 to rotate to corresponding angles through clamping, so that the positions of the tooth ring of the stator 4 and the magnetic poles of the rotor 7 are relatively fixed. The driving motor 12 and the upper positioning tooling 11 drive the rotor 7 to rotate. The driving motor 12 can also gradually apply a known torque value to the rotor 7 and serve as a reference for calibration. At the same time, the output signal of the sensor is recorded, a calibration curve is drawn, and the calibration work is carried out. Through precise calibration, the consistency of the torque sensor in the production process can be ensured, and the defective rate caused by inaccurate calibration can be reduced. By adjusting the relative positions of the tooth ring and the magnetic poles, it is converted into the position adjustment of the first positioning groove 6 and the second positioning groove 8, making the calibration process more intuitive and fast. The lifting device 10 can facilitate providing space for placing the rotor 7.
[0024] As Figure 1 、 5 As shown in Fig. -6, the lower positioning tooling 9 and the upper positioning tooling 11 have the same structure, and both include a rotating disk 13. A positioning chamber 14 is provided inside the rotating disk 13. A spring telescopic rod 32 is provided inside the positioning chamber 14. The telescopic end of the spring telescopic rod 32 can penetrate through the positioning chamber 14 and be placed inside the first positioning groove 6 or the second positioning groove 8. A pressure sensor is provided between the spring telescopic rod 32 and the rotating disk 13. The width of the positioning groove is the same as the width of the telescopic end of the spring telescopic rod 32, and the smaller the gap between the positioning groove and the spring telescopic rod 32, the more accurate the positioning. The pressure sensor is a prior art. The spring telescopic rod 32 includes an outer cylinder and an inner rod. The inner rod slides inside the outer cylinder. A spring is provided inside the outer cylinder. The axis of the spring coincides with the outer cylinder. One end of the inner rod placed inside the outer cylinder abuts against the spring.
[0025] During use, after the stator 4 is placed in the positioning hole, the weight of the stator 4 itself will compress the spring telescopic rod 32, and the compression will cause the pressure of the spring to increase. After the pressure sensor detects the increase in the pressure of the spring, the drive motor 12 is started and the drive motor 12 drives the rotating disk 13 to rotate. The rotating disk 13 drives the spring telescopic rod 32 to rotate along the end face of the rotor 7 or the stator 4. When the telescopic end of the spring telescopic rod 32 corresponds to the first positioning groove 6, the spring returns to its original state under the action of its own elastic force and inserts into the first positioning groove 6, so that the side wall of the spring telescopic rod 32 abuts against the side wall of the first positioning groove 6, realizing the clamping connection between the telescopic end of the spring telescopic rod 32 and the first positioning groove 6. After the spring returns to its original state, the pressure exerted on the pressure sensor will decrease accordingly. After the pressure sensor detects the decrease in pressure, it controls the drive motor 12 to drive the rotating disk 13 to rotate again. The rotating disk 13 rotates the stator 4 to a fixed position under the clamping action of the spring telescopic rod 32 and the first positioning groove 6, realizing the automatic adjustment function and improving the operation convenience. Similarly, the upper positioning tooling 11 drives the rotor 7 to a fixed position through the clamping action with the second positioning groove 8, making the angles of the rotor 7 and the stator 4 relatively fixed and ensuring the accuracy of the calibration process. During the process of the rotating disk 13 rotating to make the spring telescopic rod 32 engage with the positioning groove, a certain gap can be set between the rotating disk 13 and the rotor 7 and the stator 4, which can ensure that the spring telescopic rod 32 is compressed, preventing the situation that the rotor 7 and the stator 4 rotate following the rotating disk 13 due to the large friction between the rotating disk 13 and the rotor 7 and the stator 4. By setting the spring telescopic rod 32, the lower positioning tooling 9 and the upper positioning tooling 11 can accurately engage with the first positioning groove 6 and the second positioning groove 8. Through the pressure sensor, it is convenient to control the rotation of the drive motor 12, thereby realizing the precise positioning of the stator 4 and the rotor 7.
[0026] As Figure 1-3 shown, the lifting device 10 is provided with a jaw 15. The lifting device 10 slides along the drive frame 16 through a linear motor group 17. The drive frame 16 enables the lifting device 10 to pass through a conveyor belt 18, a magnetization device 19 and a bracket 1 in sequence. The linear motor group 17 can also be a linear drive device such as a gear chain or a ball screw. The linear motor group 17, the magnetization device 19 and the conveyor belt 18 are all prior arts. The linear motor group 17 drives the jaw 15 to move through the lifting device 10. The conveyor belt 18 can move the unmagnetized rotor 7 to a fixed position. The lifting device 10 positions the rotor 7 on the conveyor belt 18 and moves the rotor 7 into the magnetization device 19 through the jaw 15. The magnet ring of the rotor 7 is magnetized through the magnetization device 19, so that the magnetic poles of each rotor 7 are always in the same position as the second positioning groove 8. Then, the linear motor group 17 moves the magnetized rotor 7 into the stator 4 of the bracket 1, reducing the manual operation during the magnetization and installation of the rotor 7, reducing the labor intensity and operation error, and improving the production quality.
[0027] As Figure 3 shown, the lifting device 10 includes a driving telescopic rod 33. A baffle 20 is circumferentially fixed on the driving telescopic rod 33. An isosceles trapezoidal telescopic block 21 is fixed at the telescopic end of the driving telescopic rod 33. The large end of the telescopic block 21 is close to the positioning plate 2. A limiting plate 22 is slidably mounted on the side wall of the telescopic end of the driving telescopic rod 33. A sliding rod 23 is fixed at the top end of the limiting plate 22. The other end of the sliding rod 23 penetrates through the baffle 20, and a limiting block 24 is fixed at the end of the sliding rod 23 that penetrates through the baffle 20. A vertical plate 25 is provided on one side of the limiting plate 22. A horizontal slideway 26 is provided on the side of the vertical plate 25 close to the telescopic block 21. Clamping blocks 27 are slidably connected to both inclined sides of the telescopic block 21. The side walls of the clamping blocks 27 are slidably connected to the vertical plate 25 through the horizontal slideway 26. An arc-shaped plate 28 is fixed at the bottom end of the clamping block 27. The arc-shaped plates 28 form a clamping jaw 15 correspondingly. A second spring is provided on the side wall of the sliding rod 23. The second spring can provide a thrust for the limiting plate 22, effectively preventing the limiting plate 22 from shaking during operation and ensuring the stability of the operation. The driving telescopic rod 33 is an existing telescopic rod structure such as an electric push rod or a hydraulic rod.
[0028] During the process of gripping the rotor 7, the driving telescopic rod 33 drives the upper positioning tooling 11 to move downward through the telescopic block 21. The driving telescopic rod 33 extends. At this time, under the action of gravity, the limiting plate 22 drives the sliding rod 23 and the limiting block 24 to approach the baffle 20. When the limiting block 24 abuts against the baffle 20, the telescopic block 21 drives the clamping blocks 27 to approach each other along the horizontal slideway 26 through two hypotenuses. The mutual approach of the horizontal slideways 26 causes the clamping jaws 15 to approach the rotor 7. When the upper positioning tooling 11 completely abuts against the top end of the rotor 7, the clamping jaws 15 formed by the arc-shaped plates 28 fix the rotor 7. When it is necessary to engage the second positioning groove 8 with the upper positioning tooling 11, a gap is set between the upper positioning tooling 11 and the rotor 7 so that the telescopic end of the spring telescopic rod 32 can be placed in the second positioning groove 8. At this time, a gap is also formed between the arc-shaped plate 28 and the side wall of the rotor 7 to ensure the rotatability of the rotor 7. When it is necessary to place the rotor 7 into the magnetizing device 19 or the stator 4, the driving telescopic rod 33 contracts, and the telescopic block 21 drives the clamping blocks 27 to move away from each other, increasing the distance between the arc-shaped plates 28. After the telescopic block 21 approaches the limiting plate 22, the driving telescopic rod 33 drives the limiting plate 22 to move upward through the telescopic block 21, and the limiting plate 22 drives the limiting block 24 of the sliding rod 23 away from the baffle 20, realizing the lifting of the clamping jaws 15. The isosceles trapezoidal telescopic block 21 enables the clamping blocks 27 to move relative to each other synchronously along the horizontal slideway 26. By setting the clamping jaws 15 formed by the arc-shaped plates 28, the clamping jaws 15 can better fix the rotor 7, improving the stability of the gripping process. By a single driving telescopic rod 33, the opening and closing control of the clamping jaws 15 and the overall lifting of the lifting device 10 are realized, simplifying the complex structure that may require multiple drivers in the traditional design, reducing the manufacturing cost and the maintenance difficulty. The telescopic block 21 drives the clamping blocks 27 to approach or move away from each other along the horizontal slideway 26 through the hypotenuse, realizing the reliable clamping and release of the clamping jaws 15.
[0029] As Figure 5-6 shown, a chute 29 is provided in the radial direction of the rotating disk 13, and the chute 29 is fixedly slidably connected to the positioning bin 14. A long circular hole is provided at the bottom of the chute 29, and a threaded hole is provided at the bottom of the positioning bin 14. The small end of the bolt passes through the long circular hole and is fixedly connected to the threaded hole. The sliding and fixing of the positioning bin 14 are realized through the bolt, facilitating the adjustment of the position of the positioning bin 14. By setting the chute 29 and the positioning bin 14, the spring telescopic rod 32 can slide along the radial direction of the rotating disk 13, adapting to stators 4 and rotors 7 of different radius specifications, expanding the application range of the equipment, reducing the time for replacing tools or adjusting the equipment, and improving the flexibility and efficiency of the production line.
[0030] As Figure 2 、 4As shown in the figure, a plurality of screw holes 30 are provided on the positioning plate 2. The screw holes 30 are screwed with studs, and the studs are screwed with sleeves 31. The sleeves 31 are abutted against the side wall of the housing 3. Compared with the traditional fixing method, the design of the screw holes 30, studs and sleeves 31 simplifies the installation process of the housing 3. The operator only needs to select the appropriate screw holes 30 according to the specifications and position requirements of the housing 3 and install the studs and sleeves 31, without complex adjustment and calibration work. The studs and sleeves 31 are tightly abutted against the side wall of the housing 3, forming a stable support structure, which helps to reduce the vibration and displacement of the housing 3 during operation and improve the overall stability and reliability of the equipment. The sleeves 31 are abutted against the side wall of the housing 3, providing stable support, reducing the shaking during work, and ensuring the stability and repeated accuracy of positioning.
[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A torque sensor positioning and calibration tool, comprising a bracket (1), characterized in that: A positioning plate (2) is provided on the bracket (1), the positioning plate (2) can fix the housing (3), a stator (4) is rotatably arranged in the housing (3), a positioning hole is formed on the positioning plate (2), the positioning hole corresponds to the small end of the stator (4), a first positioning groove (6) is provided at the bottom end of the stator (4), the stator (4) can accommodate the rotor (7), a second positioning groove (8) is provided at the top end of the rotor (7), a lower positioning tool (9) is provided below the positioning hole, a lifting device (10) is provided above the bracket (1), an upper positioning tool (11) is fixed at the bottom end of the lifting device (10), the lower positioning tool (9) can be clamped with the first positioning groove (6), the upper positioning tool (11) can be clamped with the second positioning groove (8), and both the lower positioning tool (9) and the upper positioning tool (11) are rotated by a driving motor (12).
2. The positioning and calibration tool for a torque sensor according to claim 1, characterized in that: The lower positioning tool (9) and the upper positioning tool (11) have the same structure, and both include a rotating disk (13). A positioning chamber (14) is provided in the rotating disk (13). A spring telescopic rod (32) is provided in the positioning chamber (14). The telescopic end of the spring telescopic rod (32) can pass through the positioning chamber (14) and be placed in the first positioning groove (6) or the second positioning groove (8). A pressure sensor is provided between the spring telescopic rod (32) and the rotating disk (13).
3. The positioning and calibration tool for a torque sensor according to claim 1, characterized in that: The lifting device (10) is provided with a clamping claw (15). The lifting device (10) slides along a driving frame (16) via a linear motor group (17). The driving frame (16) causes the lifting device (10) to pass through a conveyor belt (18), a magnetizing device (19) and a bracket (1) in sequence.
4. The positioning and calibration tool for a torque sensor according to claim 3, characterized in that: The lifting device (10) comprises a driving telescopic rod (33), a baffle (20) is fixed to the circumference of the driving telescopic rod (33), an isosceles trapezoidal telescopic block (21) is fixed to the telescopic end of the driving telescopic rod (33), the large end of the telescopic block (21) is close to the positioning plate (2), a limit plate (22) is slidably disposed on the side wall of the telescopic end of the driving telescopic rod (33), a sliding rod (23) is fixed to the top end of the limit plate (22), the other end of the sliding rod (23) passes through the baffle (20), and the sliding rod (23) passes through the positioning plate (22). A limit block (24) is fixed at one end of the baffle plate (20), a vertical plate (25) is provided on one side of the limit plate (22), a horizontal slideway (26) is provided on the side of the vertical plate (25) close to the telescopic block (21), both oblique sides of the telescopic block (21) are slidably connected with clamping blocks (27), the side walls of the clamping blocks (27) are slidably connected with the vertical plate (25) via the horizontal slideway (26), and the bottom ends of the clamping blocks (27) are fixed with arc plates (28), and the arc plates (28) form clamping claws (15) correspondingly.
5. The positioning and calibration tool for a torque sensor according to claim 2, characterized in that: A sliding groove (29) is provided in the radial direction of the rotating disk (13), and the sliding groove (29) is fixedly slidably connected to the positioning bin (14).
6. The positioning and calibration tool for a torque sensor according to claim 1, characterized in that: The positioning plate (2) is provided with a plurality of screw holes (30), the screw holes (30) are screwed with studs, the studs are screwed with sleeves (31), and the sleeves (31) abut against the side wall of the housing (3).