An assembly fixture and method for aligning magnetic rings of a steering torque sensor

Abstract

This invention discloses an assembly fixture and method for aligning the magnetic rings of a steering torque sensor, belonging to the field of steering torque sensor manufacturing technology. It includes a lever assembly and two coaxially opposite, adjustable-distance sensor left and right ring fixing units. The sensor left ring is fixedly connected to a torsion bar. The lever assembly includes a trapezoidal lead screw and a lever fixedly connected to the sensor right ring fixing unit. A horizontal lever is fixedly connected to the lead screw slider, and the horizontal lever and the trapezoidal lead screw are located on the same horizontal plane and axially perpendicular. An angle offset sensor is provided on the sensor right and left rings. A lever sleeve is slidably connected to the lever, and one end of the lever sleeve is fixedly connected to the horizontal lever via a spherical bearing. This invention solves the problem of magnetic pole alignment on the left and right rings during the manufacturing of the steering torque sensor, and the lever assembly provides higher angle adjustment accuracy and ease of use.

Description

Technical Field

[0001] This invention belongs to the field of steering torque sensor manufacturing technology, and relates to an assembly tool and method for aligning the magnetic ring of a steering torque sensor. Background Technology

[0002] Electro-hydraulic power steering (EHPS) systems in the commercial vehicle sector are increasingly evolving towards higher safety, higher power density, higher integration, higher efficiency, higher EMC / EMI levels, and greater intelligence. The torque sensor is a core component of the EHPS system; it is also known as a torque meter, torque force sensor, or torque gauge. A torque sensor detects the torsional torque on various rotating or non-rotating mechanical components. It converts the physical change in torque into a precise electrical signal. Torque sensors can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, offering advantages such as high accuracy, fast frequency response, high reliability, and long lifespan. The torque sensor is based on a magnetic principle, utilizing a torsion bar placed on the steering shaft to improve the magnetic bending path. The sensor has several pairs of magnetic rings evenly distributed around the torsion bar, and the alignment accuracy of each pair of magnetic rings needs to be within 0.08° (±0.04°). When assembling a torque sensor, the precision required for adjusting the angle when aligning the magnetic ring is extremely high, the product is very small, and each pair of magnetic poles cannot be attracted together. Therefore, a precise and easy-to-operate assembly tooling and method are needed.

[0003] Currently, there is no high-precision and easy-to-operate torque sensor assembly fixture for magnetic ring alignment. For example, Chinese invention patent application number 201910195435.9, "A Rapid Calibration Device for Torque Sensors," first clamps and fixes a standard torque sensor and the torque sensor to be calibrated, then applies a certain torque to the lever arm through left and right torque generating mechanisms, causing the lever arm to drive the standard torque sensor and the torque sensor to be calibrated to move synchronously. At this time, the values ​​of the standard torque sensor and the torque sensor to be calibrated are read and compared to determine whether the torque sensor to be calibrated meets the testing requirements. However, it cannot be directly used for magnetic ring alignment during the assembly of steering torque sensors. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that there is no high-precision and easy-to-operate assembly tooling for aligning magnetic rings of torque sensors in the prior art, and to provide an assembly tooling and method for aligning magnetic rings of steering torque sensors.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] In a first aspect, the present invention provides an assembly fixture for aligning the magnetic ring of a steering torque sensor, comprising a lever assembly and a sensor left ring fixing unit and a sensor right ring fixing unit coaxially opposite each other and with adjustable distance; the sensor left ring is fixedly connected to a torsion bar; the lever assembly includes a trapezoidal lead screw and a lever fixedly connected to the sensor right ring fixing unit, a lead screw slider is slidably connected to the trapezoidal lead screw, and a horizontal lever is fixedly connected to the lead screw slider, the horizontal lever and the trapezoidal lead screw being located on the same horizontal plane and perpendicular to each other axially; the trapezoidal lead screw is connected to a power source; angle offset sensors are provided on the sensor right ring and the sensor left ring, and the angle offset sensors are connected to a controller; a lever sleeve is slidably connected to the lever, one end of the lever sleeve being fixedly connected to the horizontal lever through a spherical bearing; the rotation of the trapezoidal lead screw drives the lead screw slider to move axially, the lead screw slider drives the horizontal lever to move, and the horizontal lever drives the sensor right ring fixing unit to rotate around its own axis until the controller displays that the sensor right ring and the sensor left ring are aligned.

[0007] A further improvement of the present invention is that:

[0008] It also includes a second-layer support base; the sensor left ring fixing unit includes a quick clamp and a left positioning seat fixedly connected to the second-layer support base, and the left positioning seat is provided with a fixing groove adapted to the torsion rod.

[0009] It also includes a base layer; the two ends of the trapezoidal lead screw are fixedly supported on the base layer, and the lead screw slider moves in the groove on the base layer; the second-layer support is fixedly supported above the base layer.

[0010] The sensor right ring fixing unit includes a bearing seat coaxially opposite to the left positioning seat, the bearing seat supporting a bearing, and the bearing supporting a right positioning sleeve; the right positioning sleeve is coaxial with the left positioning seat; the right positioning sleeve is provided with a clamp adapted to the sensor right ring; the right positioning sleeve is fixedly connected to the lever; a position standard line is provided on the second-layer support seat; the bearing seat is slidably fixed on the second-layer support seat by a nut, and when the position of the bearing seat is adjusted to the position standard line, the nut is tightened to fix the bearing seat.

[0011] The lever is engaged with a welding handle, and the welding handle is fixedly connected to a right positioning sleeve; the lever and the welding handle are detachable.

[0012] The non-clamping end of the gripper is connected to a push rod, which extends through the right positioning sleeve and is threadedly connected to it. A small handwheel is fixedly connected to one end of the push rod that extends through the right positioning sleeve.

[0013] One end of the trapezoidal lead screw is connected to a large handwheel, which is used to control the rotation angle of the trapezoidal lead screw.

[0014] The minimum rotation angle of the trapezoidal lead screw is 4°, and the minimum length of the lever is 171mm.

[0015] The lever assembly also includes a fine-tuning handwheel, which is fixedly connected to a push rod. The push rod is used to apply a force perpendicular to the axis of the horizontal lever to the horizontal lever.

[0016] Secondly, the present invention provides an assembly method for aligning the magnetic ring of a steering torque sensor, comprising the following steps:

[0017] Step 1: Move the bearing seat to the furthest point on the second-layer support seat from the left positioning seat. Install the torsion bar and the left sensor ring, which are already fixed together, into the left positioning seat and use quick clamps to clamp the left sensor ring. Install the right sensor ring into the right positioning sleeve and tighten the small handwheel to clamp the right sensor ring.

[0018] Step 2: Move the bearing housing to the position standard line and tighten the nut;

[0019] Step 3: First adjust the large handwheel, then adjust the fine adjustment handwheel. When the controller's display shows that the alignment angle between the right and left rings of the sensor is within the specified accuracy range, weld the right ring of the sensor onto the torsion bar.

[0020] Step 4: After welding 1-2 positions, release the lever and welding handle, release the quick clamp, rotate the welding handle, and weld the other positions of the sensor right ring and torsion bar.

[0021] Step 5: After welding is completed, loosen the nut, move the bearing seat away from the left positioning seat, and remove the welded steering torque sensor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention discloses an assembly fixture for aligning the magnetic rings of a steering torque sensor. A left and right ring fixing unit respectively fixes the left and right rings of the sensor, ensuring axial alignment. A trapezoidal lead screw rotates, causing a lead screw slider to move axially. The lead screw slider drives a horizontal lever, which in turn rotates the right ring fixing unit around its own axis until the controller displays that the right and left rings are aligned. The right ring is then welded to the sensor torsion bar. This invention solves the problem of magnetic pole alignment on the left and right rings during the manufacturing of the steering torque sensor. The lever assembly provides higher angle adjustment accuracy and is easy to use.

[0024] Furthermore, the lever and the right positioning sleeve are fixedly connected by a welding handle. The welding handle and the lever are detachable. After the magnetic poles on the left and right rings are aligned, the sensor right ring and the torsion rod are welded together at a convenient position. Then, the welding handle is removed from the lever, which drives the right positioning sleeve and the half-welded sensor to rotate. The welding of the sensor right ring and the other positions of the torsion rod continues, which is convenient for the operator and improves the welding quality.

[0025] Furthermore, a fine-tuning handle was designed using the lever principle. The push rod is used to apply a force perpendicular to the axis of the horizontal lever, which can cause the horizontal lever to drive the lever to rotate the large handwheel to adjust the angle by 1 / 4 angle, resulting in higher adjustment accuracy.

[0026] Furthermore, the minimum rotation angle of the trapezoidal lead screw is 4°, and the minimum length of the lever is 171mm. The formula for the lever rotation angle is tanα=L / H, where α is the angle of sensor movement, L is the distance the lead screw slider moves on the trapezoidal lead screw, and H is the axial distance between the torsion bar 19 and the horizontal lever 10. The pitch of the trapezoidal lead screw is P=5, meaning that for every revolution of the trapezoidal lead screw, the lead screw slider moves 5mm on the trapezoidal lead screw, i.e., L is 5mm. If an adjustment angle accuracy within ±0.02 is required, assuming the minimum adjustable angle is 4°, the minimum distance the lead screw slider moves is L=(4° / 360°)x5≈0.055mm. Therefore, the shortest length of the lever is H=L / tanα=0.055 / tan(0.02)≈159.1mm. Retaining a certain margin, H is tentatively set at 171mm. Considering that the value of the tanα function increases with the increase of the angle, the change in α decreases as L increases uniformly. This allows for angle adjustment accuracy within ±0.02. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of the overall structure of an assembly tool for aligning the magnetic ring of a steering torque sensor according to the present invention.

[0029] Figure 2 This is a top view of the overall structure of an assembly fixture for aligning the magnetic ring of a steering torque sensor according to the present invention.

[0030] Figure 3This is a partial structural diagram of the sensor right ring fixing unit in an assembly fixture for aligning the magnetic ring of a steering torque sensor according to the present invention.

[0031] Figure 4 This is a perspective view of the sensor structure assembled using an assembly fixture for aligning the magnetic ring of a steering torque sensor according to the present invention.

[0032] Figure 5 This is a schematic diagram of a lever assembly for aligning the magnetic ring of a steering torque sensor, as described in this invention.

[0033] The components are: 1-Left positioning seat; 2-Quick clamp; 3-Wing nut; 4-Deep groove ball bearing; 5-Bearing seat; 6-Right positioning sleeve; 7-Turn lever; 8-Turn lever sleeve; 9-Spherical bearing; 10-Horizontal turn lever; 11-Trapezoidal lead screw; 12-Large handwheel; 13-Gripper; 14-Top rod; 15-Small handwheel; 16-First-layer base; 17-Second-layer support seat; 18-Lead screw slider; 19-Torsion rod; 20-Left ring of sensor; 21-Right ring of sensor; 22-Fine adjustment handwheel; 23-Welding handle. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0040] The present invention will now be described in further detail with reference to the accompanying drawings:

[0041] See Figure 1 , Figure 2 and Figure 4This invention discloses an assembly fixture for aligning the magnetic ring of a steering torque sensor, including a lever assembly and a sensor left ring fixing unit and a sensor right ring fixing unit coaxially opposite each other and with adjustable distance; the sensor left ring 20 is fixedly connected to a torsion bar 19; the lever assembly includes a trapezoidal lead screw 11 and a lever 7 fixedly connected to the sensor right ring fixing unit, a lead screw slider 18 is slidably connected to the trapezoidal lead screw 11, and a horizontal lever 10 is fixedly connected to the lead screw slider 18, the horizontal lever 10 and the trapezoidal lead screw 11 being located on the same horizontal plane and perpendicular to each other axially; the trapezoidal lead screw 11... A trapezoidal lead screw 11 is connected to a power source; angle offset sensors are installed on the right and left rings of the sensor, and the angle offset sensors are connected to a controller; a lever 7 is slidably connected to a lever sleeve 8, one end of which is fixedly connected to the horizontal lever 10 via a joint bearing 9; the rotation of the trapezoidal lead screw 11 drives the lead screw slider 18 to move axially, the lead screw slider 18 drives the horizontal lever 10 to move, and the horizontal lever 10 drives the sensor right ring fixing unit to rotate around its own axis via the lever 7 until the controller displays that the sensor right ring and sensor left ring are aligned. One end of the trapezoidal lead screw 11 is connected to a large handwheel 12 for controlling the rotation angle of the trapezoidal lead screw 11. The minimum rotation angle of the trapezoidal lead screw 11 is 4°, and the minimum length of the lever 7 is 171mm. The lever 7, lever sleeve 8, and spherical bearing 9 together form the lever assembly, used to adjust the angle of the right ring of the sensor. The lever 7 can slide within the lever sleeve 8 to adapt to different angles and lengthen the lever assembly. The spherical bearing 9 can rotate with the horizontal lever 10 to adapt to the corresponding angle; otherwise, the horizontal lever 10 cannot rotate. The horizontal lever 10 can adjust smaller angles using the lever principle. The movement of the trapezoidal screw 11 can adjust the angle of the lever assembly. The rotation of the large handwheel 12 adjusts the rotation angle of the trapezoidal screw 11, thereby controlling the distance the screw slider moves on it.

[0042] See Figure 3 The non-clamping end of the gripper 13 is connected to a push rod 14. The push rod 14 extends through the right positioning sleeve 6 and is threadedly connected to the right positioning sleeve 6. A small handwheel 15 is fixedly connected to one end of the push rod 14 extending through the right positioning sleeve 6. The gripper 13 is used to clamp the right ring of the sensor, causing it to rotate with the right positioning sleeve 6, and then is controlled by the lever assembly to rotate with it. The conical surface of the push rod 14 mates with the conical surface of the gripper 13, and when it moves to the left, the gripper 13 can clamp the right ring of the sensor. The small handwheel 15 is mounted on the end face of the push rod and is used to manually rotate the push rod 14, causing it to rotate and move left and right within the threaded hole.

[0043] See Figure 2It also includes a second-layer support base 17; the sensor left ring fixing unit includes a quick clamp 2 and a left positioning seat 1 fixedly connected to the second-layer support base 17, and the left positioning seat 1 is provided with a fixing groove adapted to the torsion rod 19. It also includes a first-layer base 16; the two ends of the trapezoidal lead screw 11 are fixedly supported on the first-layer base 16, and the lead screw slider 18 moves in the sliding groove on the first-layer base 16; the second-layer support base 17 is fixedly supported above the first-layer base 16. The sensor right ring fixing unit includes a bearing seat 5 coaxially opposite to the left positioning seat 1. The bearing seat 5 supports a bearing 4, and the bearing 4 supports a right positioning sleeve 6. The right positioning sleeve 6 is coaxial with the left positioning seat 1. The right positioning sleeve 6 is provided with a clamp 13 adapted to the sensor right ring 21. The right positioning sleeve (6) is fixedly connected to the lever (7). A position standard line is provided on the second-layer support seat 17. The bearing seat 5 is slidably fixed on the second-layer support seat 17 by a nut 3. When the position of the bearing seat 5 is adjusted to the position standard line, the nut 3 is tightened to fix the bearing seat 5. The lever 7 is snapped with a welding handle 23, and the welding handle 23 is fixedly connected to the right positioning sleeve 6. The lever 7 and the welding handle 23 are detachable. The lever assembly also includes a fine-tuning handwheel 22, which is fixedly connected to a push rod. The push rod is used to apply a force perpendicular to the axial direction of the horizontal lever 10. The nut 3 is a wing nut. Bearing 4 is a deep groove ball bearing.

[0044] This invention discloses an assembly method for aligning the magnetic ring of a steering torque sensor, comprising the following steps:

[0045] Step 1: Move the bearing seat 5 to the position on the second-layer support seat 17 at the furthest distance from the left positioning seat 1. Install the torsion bar 19 and the left sensor ring 20, which are already fixed together, into the left positioning seat 1, and use the quick clamp 2 to clamp the left sensor ring 20. Install the right sensor ring 21 into the right positioning sleeve 6, and tighten the small handwheel 15 to make the clamp 13 clamp the right sensor ring 21.

[0046] Step 2: Move the bearing housing 5 to the position standard line and tighten the lock nut 3;

[0047] Step 3: First adjust the large handwheel 12, then adjust the fine adjustment handwheel 22. When the controller's display shows that the alignment angle between the right and left rings of the sensor is within the specified accuracy range, weld the right ring 21 of the sensor onto the torsion bar 19.

[0048] Step 4: After welding 1-2 positions, release the lever 7 and welding handle 23, release the quick clamp 2, rotate the welding handle 23, and weld the other positions of the sensor right ring 21 and torsion rod 19.

[0049] Step 5: After welding is completed, loosen nut 3, move bearing seat 5 to the left positioning seat, and remove the welded steering torque sensor.

[0050] The working principle of this invention is as follows:

[0051] The lever 7 can rotate, and the movement of the trapezoidal lead screw 11 can change the sensor angle, such as... Figure 5 As shown, the angle change formula is tanα = L / H, where α is the angle of sensor movement, L is the distance the lead screw slider moves on the trapezoidal lead screw, and H is the axial distance between the torsion rod 19 and the horizontal lever 10. The trapezoidal lead screw pitch P = 5, meaning that for every revolution of the trapezoidal lead screw 11, the lead screw slider moves 5mm on the trapezoidal lead screw, i.e., L is 5mm. If an angle adjustment accuracy within ±0.02 is required, assuming the minimum adjustable angle is 4°, the minimum distance the lead screw slider moves is L = (4° / 360°) x 5 ≈ 0.055mm. Therefore, the shortest length of the lever is H = L / tanα = 0.055 / tan(0.02) ≈ 159.1mm. Retaining a certain margin, H is tentatively set at 171mm. Considering that the tanα function value increases with the increase of the angle, the value of α decreases as L increases uniformly. Therefore, through calculation, this method is feasible.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An assembly fixture for aligning the magnetic ring of a steering torque sensor, characterized in that, The system includes a lever assembly and two coaxially opposed, adjustable sensor left and right ring fixing units; the sensor left ring (20) is fixedly connected to a torsion bar (19); the lever assembly includes a trapezoidal lead screw (11) and a lever (7) fixedly connected to the sensor right ring fixing unit; a lead screw slider (18) is slidably connected to the trapezoidal lead screw (11), and a horizontal lever (10) is fixedly connected to the lead screw slider (18); the horizontal lever (10) and the trapezoidal lead screw (11) are located on the same horizontal plane and are axially perpendicular; the trapezoidal lead screw (11) is connected to a power source; the transmission... An angle offset sensor is provided on the right ring and the left ring of the sensor, and the angle offset sensor is connected to the controller; the lever (7) is slidably connected to the lever sleeve (8), and one end of the lever sleeve (8) is fixedly connected to the horizontal lever (10) through the joint bearing (9); the trapezoidal screw (11) rotates and drives the screw slider (18) to move in its axial direction, the screw slider (18) drives the horizontal lever (10) to move, and the horizontal lever (10) drives the sensor right ring fixing unit to rotate around its own axis through the lever (7) until the controller displays that the sensor right ring and the sensor left ring are aligned; It also includes a second-layer support base (17); the sensor left ring fixing unit includes a quick clamp (2) and a left positioning base (1) fixedly connected to the second-layer support base (17), and the left positioning base (1) is provided with a fixing groove adapted to the torsion rod (19); The sensor right ring fixing unit includes a bearing seat (5) coaxially opposite to the left positioning seat (1), the bearing seat (5) supports a bearing (4), and the bearing (4) supports a right positioning sleeve (6); the right positioning sleeve (6) is coaxial with the left positioning seat (1); the right positioning sleeve (6) is provided with a clamp (13) adapted to the sensor right ring (21); the right positioning sleeve (6) is fixedly connected to the lever (7); a position standard line is provided on the second-layer support seat (17); the bearing seat (5) is slidably fixed on the second-layer support seat (17) by a nut (3), and when the position of the bearing seat (5) is adjusted to the position standard line, the nut (3) is tightened to fix the bearing seat (5).

2. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 1, characterized in that, It also includes a base (16); the two ends of the trapezoidal lead screw (11) are fixedly supported on the base (16), and the lead screw slider (18) moves in the groove on the base (16); the second support seat (17) is fixedly supported above the base (16).

3. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 1, characterized in that, The minimum rotation angle of the trapezoidal lead screw (11) is 4°, and the minimum length of the lever (7) is 171 mm.

4. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 1, characterized in that, The lever (7) is engaged with a welding handle (23), and the welding handle (23) is fixedly connected to a right positioning sleeve (6); the lever (7) and the welding handle (23) are detachable.

5. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 4, characterized in that, The non-clamping end of the gripper (13) is connected to a push rod (14). The push rod (14) passes through the right positioning sleeve (6) and is threadedly connected to the right positioning sleeve (6). A small handwheel (15) is fixedly connected to one end of the push rod (14) that passes through the right positioning sleeve (6).

6. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 5, characterized in that, One end of the trapezoidal lead screw (11) is connected to a large handwheel (12) for controlling the rotation angle of the trapezoidal lead screw (11).

7. The assembly fixture for aligning the magnetic ring of the steering torque sensor according to claim 6, characterized in that, The lever assembly also includes a fine-tuning handwheel (22), which is fixedly connected to a push rod. The push rod is used to apply a force perpendicular to the axial direction of the horizontal lever (10) to the horizontal lever (10).

8. An assembly method for aligning a magnetic ring of a steering torque sensor using the assembly fixture of claim 7, characterized in that, Includes the following steps: Step 1: Move the bearing seat (5) to the farthest point on the second-layer support seat (17) from the left positioning seat (1), install the torsion bar (19) and the left sensor ring (20) that have been fixed together in the left positioning seat (1), and use the quick clamp (2) to clamp the left sensor ring (20); install the right sensor ring (21) into the right positioning sleeve (6), tighten the small handwheel (15), and make the jaws (13) clamp the right sensor ring (21). Step 2: Move the bearing housing (5) to the position standard line and tighten the nut (3); Step 3: First adjust the large handwheel (12), then adjust the fine adjustment handwheel (22). When the controller's display shows that the alignment angle between the right and left rings of the sensor is within the specified accuracy range, weld the right ring (21) of the sensor onto the torsion bar (19). Step 4: After welding 1-2 positions, release the lever (7) and welding handle (23), release the quick clamp (2), rotate the welding handle (23), and weld the other positions of the sensor right ring (21) and torsion bar (19); Step 5: After welding is completed, loosen the nut (3), move the bearing seat (5) away from the left positioning seat, and remove the welded steering torque sensor.

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