Torque sensor calibration rack

Abstract

The utility model provides a torque sensor calibration rack which is applied to the technical field of torque sensor calibration, an adjusting shaft piece comprises a rotor shaft and a sleeve part, the rotor shaft is fixedly sleeved with a rotor, and an adjusting plug connector is inserted into the sleeve part to enable the sleeve part to expand and deform to abut against a rotatable sleeve of a sensor to be calibrated. The coaxial connection of the rotor and the sleeve is realized; a gap exists between the exterior of the sleeve part with the recovered deformation and the sleeve, so that the rotor and the sleeve are disconnected, the convenience of switching between disconnection and connection of the rotor and the sleeve is improved, and the convenience of switching between synchronous co-rotation and independent rotation of the rotor and the sleeve is further improved; and the synchronous co-rotation precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of torque sensor calibration, and in particular to a torque sensor calibration bench. Background Art

[0002] Torque sensors sense torsional moments on various rotating or non-rotating mechanical components. They convert physical changes in torque into precise electrical signals. They are used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches. They offer high accuracy, fast frequency response, excellent reliability, and long life. Torque sensors are widely used in automotive EPS (Electric Power Steering) systems, and each sensor is calibrated before shipment.

[0003] like Figure 1 As shown, the existing torque sensor calibration rig structure consists of a support structure 21, a second rotating shaft 23, a rotor 5, a sensor body 24, a first rotating shaft 22, a test platform 25, and an angle sensor. The rotor 5 is fixed to the second rotating shaft 23, the sensor body 24 is fixed to the test platform 25, and the rotating sleeve of the sensor body 24 is fixed to the first rotating shaft 22. Angle sensors are mounted on the first and second rotating shafts 22, 23, respectively, and are equipped with digital display screens for real-time reading of changing values. However, the first and second rotating shafts 22, 23 of the torque sensor calibration rig currently use a keyed connection. With the rotor 5 and the sleeve of the sensor body 25 mounted on the first and second rotating shafts 22, 23, respectively, the key between the first and second rotating shafts 22, 23 is inconvenient to remove and install. This, in turn, makes it difficult to disconnect and connect the sleeves of the rotor 5 and the sensor body 24, i.e., to switch between synchronous co-rotation and independent rotation of the rotor 5 and the sleeve of the sensor body 24, is difficult.

[0004] Based on this, a new technical solution is needed. Utility Model Content

[0005] In view of this, the present application provides a torque sensor calibration bench.

[0006] This application provides the following technical solutions:

[0007] According to the present application, a torque sensor calibration bench is provided, comprising a rotor, an adjustment connector, an adjustment shaft, a support column, and a driver; the driver is fixed to the support column; the adjustment shaft comprises a rotor shaft and a sleeve portion fixed to one end of the rotor shaft, the other end of the rotor shaft being fixedly connected to the drive shaft of the driver; the rotor shaft is used to fix the rotor;

[0008] The sensor to be calibrated is mounted on the support column. The sensor to be calibrated has a rotatable sleeve, which is sleeved outside the sleeve portion. The adjusting connector is used to be inserted into the sleeve portion to expand and deform the sleeve portion to support the sleeve, thereby achieving a coaxial connection between the rotor and the sleeve.

[0009] There is a gap between the outside of the sleeve portion that has recovered its deformation and the sleeve, so that the rotor and the sleeve are disconnected.

[0010] Preferably, the sleeve portion includes a plurality of surrounding columns, and the adjusting connector is used to be inserted into the space surrounded by the columns, so that the columns deformed outward contact the sleeve, and gaps exist between the deformed columns.

[0011] Preferably, the adjusting connector is an adjusting bolt, and the inner side walls of the plurality of columns are threadedly engaged with the adjusting bolts, so that the adjusting bolts are screwed into the sleeve portion through threaded engagement, and the columns are deformed outward to contact the sleeve.

[0012] Preferably, the head of the adjusting bolt inserted into the sleeve portion is conical or frustum-shaped;

[0013] And / or, the outer diameter of the portion of the adjusting connector inserted into the sleeve portion gradually decreases along the insertion direction.

[0014] Preferably, the sleeve portion is provided with an elastic member for facilitating the deformation recovery of the column, and the elastic member is located above the sleeve;

[0015] An accommodating groove for accommodating the elastic member is formed around the outer side wall of the column.

[0016] Preferably, the calibration stand further comprises a sensor flange and an adjusting fastener; the sensor flange is connected to the support column via the adjusting fastener, and the adjusting fastener is used to adjust the pre-tightening force between the sensor flange and the support column to enable the sensor flange to move up and down;

[0017] The sensor to be calibrated is mounted on the sensor flange, and the rotor is located under the sensor to be calibrated, so that the relative distance between the sensor to be calibrated and the rotor can be adjusted by moving the sensor flange up and down.

[0018] Preferably, the calibration stand also includes a sensor compression sleeve, and a mounting groove for mounting the sensor to be calibrated is formed on the sensor flange. The sensor compression sleeve includes a crimping portion and a fixing portion extending downward from the crimping portion; the crimping portion presses the sensor to be calibrated, and the fixing portion is fixedly connected to the sensor flange.

[0019] Preferably, the calibration stand also includes a rotor positioning sleeve and a retaining member; the retaining member is fixedly connected to the drive shaft, the rotor positioning sleeve is sleeved on the drive shaft, and the bottom of the rotor positioning sleeve is placed on the retaining member, and the rotor is located on the top of the rotor positioning sleeve.

[0020] Preferably, the calibration stand further comprises an encoder flange and an encoder, wherein the encoder flange is mounted on the driver, the encoder is mounted on the encoder flange, and the encoder is used to read the rotation angle of the drive shaft.

[0021] Preferably, the driver is a reducer; the output shaft of the reducer is the drive shaft;

[0022] The calibration stand also includes a reducer flange, a connecting ear, a base, a brake flange, an electromagnetic brake, and a handwheel; the handwheel is connected to the input shaft of the reducer, the brake flange is fixed on the reducer, and the electromagnetic brake is fixed on the brake flange, and the electromagnetic brake is used to brake the input shaft;

[0023] The reducer flange is fixed on the support column, and the reducer is fixed on the reducer flange; the support column is arranged on the base, and the connecting ear fixedly connects the support column and the base.

[0024] Compared with the prior art, the at least one technical solution adopted in this application can achieve the following beneficial effects:

[0025] The adjusting shaft of the present application includes a rotor shaft and a sleeve portion, and the rotor shaft is fixedly sleeved with the rotor. The adjusting connector is inserted into the sleeve portion to expand the sleeve portion and deform to support the rotatable sleeve of the sensor to be calibrated, thereby realizing a coaxial connection between the rotor and the sleeve; there is a gap between the outside of the sleeve portion that has recovered its deformation and the sleeve, thereby realizing disconnection between the rotor and the sleeve, improving the convenience of switching between disconnection and connection of the rotor and the sleeve, and thereby improving the convenience of switching between synchronous corotation and independent rotation of the rotor and the sleeve. In addition, the rotor and the sleeve are coaxially connected, which improves the accuracy of synchronous corotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 is a schematic diagram of an existing torque sensor calibration bench;

[0028] Figure 2 Schematic diagram of the torque sensor calibration bench of the present application.

[0029] Figure markings: 1. Adjusting bolt; 2. Spring; 3. Sensor to be calibrated; 4. Sensor clamping sleeve; 5. Rotor; 6. Rotor positioning sleeve; 7. Lock nut; 8. Output shaft; 9. Reducer flange; 10. Reducer; 11. Encoder flange; 12. Encoder; 13. Connecting ear; 14. Base; 15. Sensor flange; 16. Brake flange; 17. Electromagnetic brake; 18. Input shaft; 19. Handwheel; 20. Support column; 21. Support structure; 22. First rotating axis; 23. Second rotating axis; 24. Sensor body; 25. Test platform. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0032] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0033] It is also necessary to note that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the drawings, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in number, shape and size, and the component layout may also be more complex.

[0034] In addition, in the following description, specific details are provided in order to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0035] The applicant found that the torque sensor calibration bench needs to have the following characteristics through in-depth research and improvement exploration on the torque sensor calibration bench: 1, the gap between the rotor and the sensor body is adjustable and locked after adjustment; 2, the rotor and the sensor body sleeve can rotate synchronously or independently.

[0036] As shown in Figure 1 The first rotating shaft 22 and the second rotating shaft 23 of the torque sensor calibration bench currently have a D-shaped shaft hole reserved at the center of the two rotating shafts, and the D-shaped shaft can be disassembled to realize whether the rotating shafts rotate together. However, 1, the first rotating shaft 22 and the second rotating shaft 23 of the torque sensor calibration bench currently adopt a key connection mode with a gap, which causes the left and right to rotate together out of sync, the synchronous rotation precision is poor, and the rotor 5 and the body sleeve cannot be disconnected and linked at any moment. 2, because the rotor 5 and the body sleeve shaft of the sensor are inserted into the sensor body 24, the sensor cannot be replaced without moving the two sides. The current scheme uses bolts to fasten the two-sided support structure, which needs to be loosened and then slid, which takes a lot of time.

[0037] Based on this, the technical solutions provided by the embodiments of the present application are described below in conjunction with the drawings.

[0038] The embodiment of the present application proposes a torque sensor calibration bench, as shown in Figure 2 The torque sensor calibration bench includes a rotor 5, an adjusting plug-in part, an adjusting shaft part, a support column 20, and a driver. The driver is fixed on the support column 20. The adjusting shaft part includes a rotor shaft and a sleeve part fixed at one end of the rotor shaft, and the other end of the rotor shaft is fixedly connected to the driving shaft of the driver. The rotor shaft is used to fixedly sleeve the rotor 5. The support column 20 can be plate-shaped. The driver can be a speed reducer 10. The rotor 5 can be a magnet. The adjusting plug-in part can be an adjusting bolt 1, and the adjusting bolt 1 is in threaded connection with the sleeve part.

[0039] The sensor 3 to be calibrated is mounted on a support column 20. It includes a rotatable sleeve that fits over the outer sleeve portion. An adjustable connector is inserted into the sleeve portion, causing the outer sleeve portion to expand and deform, abutting against the sleeve portion, thereby achieving a coaxial connection between the rotor 5 and the sleeve. A gap is created between the outer sleeve portion, which has recovered its shape, and the sleeve, allowing the rotor 5 to be disconnected from the sleeve. The sleeve portion can be made of an elastic material. The sleeve can be used to connect rotating automotive components, for example.

[0040] In one embodiment, Figure 2 As shown, the sleeve portion includes multiple columns arranged around it. The adjusting connector is inserted into the space enclosed by the columns, so that the columns that are deformed outward contact the sleeve, and there are gaps between the deformed columns. There can also be gaps between the columns that have recovered their deformation. The columns can be curved plates, with the multiple columns forming inner and outer circles. When the sleeve deforms outward, the outer diameter of the sleeve portion increases.

[0041] In one embodiment, Figure 2 As shown, the adjusting connector is an adjusting bolt 1, and the inner side walls of the multiple columns are threadedly matched with the adjusting bolt 1, so that the adjusting bolt 1 is screwed into the sleeve part through threaded matching, and the columns are deformed outward to contact the sleeve.

[0042] In one embodiment, Figure 2 As shown, the head of the adjusting bolt 1 inserted into the sleeve is conical or truncated cone-shaped, and the rotor 5 may be provided with a space for accommodating the head of the adjusting bolt 1 .

[0043] Alternatively, the outer diameter of the portion of the connector inserted into the sleeve can be adjusted to gradually decrease along the insertion direction. For example, it can be conical or truncated. The rotor 5 and the sensor body of the mechanism of this application are coaxial, resulting in better coaxiality and higher precision. Furthermore, co-rotation or non-co-rotation can be achieved by simply adjusting the position of a single conical bolt, making it quick and convenient.

[0044] In one embodiment, Figure 2 As shown, the sleeve portion is provided with an elastic member for facilitating the deformation recovery of the column, and the elastic member is located above the sleeve; the elastic member can be a spring 2 or an elastic ring. A receiving groove for receiving the elastic member is formed around the outer wall of the column.

[0045] In one embodiment, Figure 2 As shown, the calibration stand also includes a sensor flange 15 and an adjustment fastener. The sensor flange 15 is connected to the support column 20 via the adjustment fastener. The adjustment fastener is used to adjust the preload between the sensor flange 15 and the support column 20, thereby allowing the sensor flange 15 to move up and down. The adjustment fastener can be an adjustment bolt 1. For example, the sensor flange 15 has a waist-shaped hole in the vertical direction. The adjustment bolt 1 passes through the waist-shaped hole and is threadedly connected to the support column 20, securing the sensor flange 15 to the support column 20 and enabling the sensor flange 15 to move up and down.

[0046] The sensor 3 to be calibrated is mounted on the sensor flange 15, and the rotor 5 is positioned below the sensor 3. The sensor 3 to be calibrated can be adjusted relative to the rotor 5 by moving the sensor flange 15 up and down. The surface of the sensor 3 facing the rotor 5 may be formed with an insertion slot for inserting the rotor 5. This mechanism of the present application adjusts the relative position of the sensor and rotor 5 by adjusting the vertical relationship between the sensor flange 15 and the support column 20. This convenient and quick mechanism requires only adjusting the preload of the bolts securing the two components, without requiring any removal of components.

[0047] In one embodiment, Figure 2 As shown, the calibration stand also includes a sensor compression sleeve 4. A mounting groove for mounting the sensor 3 to be calibrated is formed on the sensor flange 15. The sensor compression sleeve 4 includes a crimping portion and a fixing portion extending downward from the crimping portion. The crimping portion presses the sensor 3 to be calibrated, and the fixing portion is fixedly connected to the sensor flange 15. The sensor compression sleeve 4 can be made of rubber.

[0048] In one embodiment, Figure 2 As shown, the calibration rig also includes a rotor positioning sleeve 6 and a retaining member. The retaining member is fixedly connected to the drive shaft. The rotor positioning sleeve 6 is sleeved onto the drive shaft, with the bottom of the rotor positioning sleeve 6 resting on the retaining member, and the rotor 5 is positioned on top of the rotor positioning sleeve 6. The retaining member is a retaining nut 7, which is threadedly connected to the drive shaft. The drive shaft is the output shaft 8 of the reducer 10.

[0049] In one embodiment, Figure 2 As shown, the calibration stand further includes an encoder flange 11 and an encoder 12. The encoder flange 11 is mounted on the driver, and the encoder 12 is mounted on the encoder flange 11. The encoder 12 is used to read the rotation angle of the drive shaft.

[0050] In one embodiment, Figure 2As shown, the driver is a reducer 10; the output shaft 8 of the reducer 10 serves as the drive shaft. The calibration rig also includes a reducer flange 9, connecting lugs 13, a base 14, a brake flange 16, an electromagnetic brake 17, and a handwheel 19. The handwheel 19 is connected to the input shaft 18 of the reducer 10. The brake flange 16 is fixed to the reducer 10, and the electromagnetic brake 17 is fixed to the brake flange 16. The electromagnetic brake 17 is used to brake the input shaft 18. The reducer flange 9 is fixed to a support column 20, and the reducer 10 is fixed to the reducer flange 9. The support column 20 is mounted on the base 14, and the connecting lugs 13 are fixedly connected to the support column 20 and the base 14. The reducer 10 can include a combination of a primary reducer 10 and a secondary reducer 10. The handwheel 19 drives the input shaft 18, which is reduced by the primary and secondary reducers 10 and then transferred to the output shaft 8. The connecting lugs 13 are arranged in an L-shape, one on each side of the plate-shaped support column 20. The base 14 can be plate-shaped. The brake flange 16 and the electromagnetic brake 17 can be sleeved on the input shaft 18 .

[0051] The calibration bracket is divided into three parts: the reducer input shaft, the reducer output shaft, and the support frame. 1. The reducer input shaft consists of a handwheel 19, the reducer 10 input shaft 18, an electromagnetic brake 17, a brake flange 16, and the reducer 10, which are assembled in the order in which they are assembled. Its main function is to transmit the user's rotational force to the reducer 10 output shaft 8 through the handwheel 19 via the deceleration effect of the input shaft 18 and the gears of the reducer 10. The electromagnetic brake 17 locks and unlocks the input shaft 18 as needed, preventing the input and output shafts 8 from rotating under certain circumstances and causing accuracy problems. The brake flange 16 is the connecting piece between the electromagnetic brake 17 and the reducer 10. 2. The reducer output shaft consists of an adjusting bolt 1, a spring 2, a sensor to be calibrated 3, a sensor clamping sleeve 4, a rotor 5, a rotor locating sleeve 6, a retaining nut 7, the reducer 10 output shaft 8, the reducer 10, an encoder flange 11, and an encoder 12. Assemble them sequentially. Encoder 12 reads the rotation angle of output shaft 8. Encoder flange 11 connects encoder 12 to reducer 10. Reducer 10's output shaft 8 receives torque from reducer 10 and transmits it to encoder 12, rotor 5, and sensor 3 to be calibrated. Locknut 7 rotates with a wrench, lifting rotor locating sleeve 6 and thereby removing rotor 5 due to thread action. Rotor locating sleeve 6 positions rotor 5 through its structural characteristics and, together with locknut 7, facilitates removal. Sensor clamping sleeve 4 secures sensor 3 to be calibrated. Spring 2 reduces the outer diameter of the top portion of output shaft 8. Adjusting bolt 1 increases the outer diameter of the top portion of output shaft 8 through the thread force driven by its tapered surface. 3. Support frame: Consists of base 14, connecting lugs 13, reducer flange 9, and sensor flange 15. The function of the base 14 is to ensure the stability of the test stand; the function of the connecting ear 13 is to connect the base 14 to the support column 20; the function of the reducer flange 9 is to connect the reducer 10 to the support column 20; the function of the sensor flange 15 is to connect the sensor to the support column 20, and at the same time, the relative position of the sensor and the rotor 5 is adjusted by adjusting the relative position of the sensor flange 15 and the support column 20.

[0052] Test preparation stage: open the slide lock on the rotor shaft side, move it to the left, and install the rotor shaft into it; open the slide lock on the right sleeve part and move it to the right; install the sensor on the sensor support and assemble the pressure plate; then slide the slides on both sides to the test point and lock the slides.

[0053] Dynamic Calibration: 1. Torque Signal Calibration: The sleeve remains stationary, and the rotor shaft drives the magnet to rotate the rotor 5 to a -4° position. The minimum value of T1 is calibrated to 0.5V, and the maximum value of T2 is 4.5V. Then, the rotor shaft drives the magnet to rotate to a +4° position, and the maximum value of T1 is calibrated to 4.5V, and the minimum value of T2 is calibrated to 0.5V. 2. Zero Torque Error Compensation: The sleeve and rotor 5 rotate coaxially ±360°, and the zero torque signal is collected. The error between the average value and the standard 2.5V is calculated. This deviation is compensated by adjusting the maximum and minimum values ​​of the torque signal calibration. T1 and T2 are two PWM signals (pulse width modulation signals).

[0054] For example, the torque accuracy test: 1. The sleeve and rotor 5 rotate coaxially clockwise 360°, and then rotate counterclockwise 360°. During this process, the 0 torque signal output by T1 and T2 is collected, and the deviation between the average value and the standard 2.5V is calculated; 2. The sleeve does not move, and the rotor 5 rotates ±4°. The torque signals T1 and T2 are collected, and the linearity, symmetry and other indicators of the torque signal are calculated.

[0055] The torque sensor calibration rig proposed in this application is simple to calibrate and easy to replace. Using this mechanism, the proposed method improves calibration accuracy by 3% and reduces calibration time by 30% compared to previous methods. This application enables rapid calibration of torque sensors and improves the data acquisition accuracy of the sensor calibration rig.

[0056] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0057] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A torque sensor calibration bench, characterized in that: It includes a rotor, an adjustment plug-in component, an adjustment shaft component, a support column, and a driver; the driver is fixed to the support column; the adjustment shaft component includes a rotor shaft and a sleeve portion fixed to one end of the rotor shaft, and the other end of the rotor shaft is fixedly connected to the drive shaft of the driver; the rotor shaft is used to fix the rotor; The sensor to be calibrated is mounted on the support column. The sensor to be calibrated has a rotatable sleeve, which is sleeved outside the sleeve portion. The adjusting connector is used to be inserted into the sleeve portion to expand and deform the sleeve portion to support the sleeve, thereby achieving a coaxial connection between the rotor and the sleeve. There is a gap between the outside of the sleeve portion that has recovered its deformation and the sleeve, so that the rotor and the sleeve are disconnected.

2. The torque sensor calibration bench according to claim 1, characterized in that: The sleeve portion includes a plurality of columns arranged around it, and the adjusting connector is used to be inserted into the space surrounded by the columns, so that the columns deformed outward contact the sleeve, and gaps exist between the deformed columns.

3. The torque sensor calibration bench according to claim 2, characterized in that: The adjusting connector is an adjusting bolt, and the inner side walls of the plurality of columns are threadedly engaged with the adjusting bolts so that the adjusting bolts are screwed into the sleeve portion through threaded engagement, and the columns are deformed outward to contact the sleeve.

4. The torque sensor calibration bench according to claim 3, characterized in that: The head of the adjusting bolt inserted into the sleeve portion is conical or truncated cone-shaped; And / or, the outer diameter of the portion of the adjusting connector inserted into the sleeve portion gradually decreases along the insertion direction.

5. The torque sensor calibration bench according to claim 2, characterized in that: The sleeve portion is provided with an elastic member on its outer surface to facilitate the deformation recovery of the column, and the elastic member is located above the sleeve; An accommodating groove for accommodating the elastic member is formed around the outer side wall of the column.

6. The torque sensor calibration bench according to claim 1, characterized in that: The calibration stand also includes a sensor flange and an adjusting fastener; the sensor flange is connected to the support column through the adjusting fastener, and the adjusting fastener is used to adjust the pre-tightening force between the sensor flange and the support column to enable the sensor flange to move up and down; The sensor to be calibrated is mounted on the sensor flange, and the rotor is located under the sensor to be calibrated, so that the relative distance between the sensor to be calibrated and the rotor can be adjusted by moving the sensor flange up and down.

7. The torque sensor calibration stand according to claim 6, characterized in that: The calibration stand also includes a sensor compression sleeve, and a mounting groove for mounting the sensor to be calibrated is formed on the sensor flange. The sensor compression sleeve includes a crimping portion and a fixing portion extending downward from the crimping portion; the crimping portion presses the sensor to be calibrated, and the fixing portion is fixedly connected to the sensor flange.

8. The torque sensor calibration bench according to claim 1, characterized in that: The calibration stand also includes a rotor positioning sleeve and a retaining member; the retaining member is fixedly connected to the drive shaft, the rotor positioning sleeve is sleeved on the drive shaft, and the bottom of the rotor positioning sleeve is placed on the retaining member, and the rotor is located on the top of the rotor positioning sleeve.

9. The torque sensor calibration stand according to claim 1, characterized in that: The calibration stand further includes an encoder flange and an encoder. The encoder flange is mounted on the driver, and the encoder is mounted on the encoder flange. The encoder is used to read the rotation angle of the drive shaft.

10. The torque sensor calibration bench according to claim 1, characterized in that: The driver is a reducer; the output shaft of the reducer is the drive shaft; The calibration stand also includes a reducer flange, a connecting ear, a base, a brake flange, an electromagnetic brake, and a handwheel; the handwheel is connected to the input shaft of the reducer, the brake flange is fixed on the reducer, and the electromagnetic brake is fixed on the brake flange, and the electromagnetic brake is used to brake the input shaft; The reducer flange is fixed on the support column, and the reducer is fixed on the reducer flange; the support column is arranged on the base, and the connecting ear fixedly connects the support column and the base.

Images