Automatic adjustment device and automatic adjustment method

Abstract

The invention discloses an automatic adjustment device and an automatic adjustment method, and the device comprises a verification head which is provided with an internal tooth structure matched with a gear on a crank arm box; the first driving assembly is connected with the verification head and is used for driving the verification head to rotate; the second driving assembly is connected with the first driving assembly and is used for driving the first driving assembly and the verification head to reciprocate along a set direction; the detection unit is used for detecting the moving stroke of a moving contact in the circuit breaker; the marking assembly is arranged on the first driving assembly; and the marking assembly is used for drawing a line at a preset position of the crank arm box when the moving stroke of the moving contact in the circuit breaker reaches a set stroke. According to the invention, the detection efficiency and the detection precision can be improved, a line can be drawn at the preset position of the crank arm box through the marking assembly when the moving stroke of the moving contact reaches the set stroke, and the reference state of the moving side of the circuit breaker can be accurately marked while the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of isolating switch manufacturing equipment, in particular to an automatic adjustment device and an automatic adjustment method. BACKGROUND

[0002] A circuit breaker is a kind of switch device capable of connecting, carrying and breaking current under normal and fault conditions. After the circuit breaker is assembled, the moving contact in the moving side of the circuit breaker can be moved by the gear on the crank arm box, so as to realize the on-off of the moving contact in the moving side of the circuit breaker and the stationary contact in the stationary side of the circuit breaker. During assembly, the moving side of the circuit breaker is generally assembled with the crank arm box first, and then the two are assembled with the stationary side of the circuit breaker. After the moving side of the circuit breaker and the crank arm box are assembled, in order to avoid problems in assembly causing the moving contact to fail to operate normally, the gear in the crank arm box is generally rotated to detect the assembly result.

[0003] In the prior art, the gear on the crank arm box is generally rotated by manual checking to move the moving contact in the moving side of the circuit breaker, and whether there is a jamming problem is judged by hand feeling, and the moving stroke of the moving contact (the moving stroke of the moving contact is a key parameter, which is directly related to whether the circuit breaker can reliably cut off the fault current within the specified time to achieve effective protection of the power system) is measured by manual measurement. Due to the limitations of manual operation and the subjectivity of manual observation, the measurement and judgment accuracy of the moving process of the moving contact is poor, and the detection efficiency and accuracy are poor. At the same time, after the above manual detection is completed, the moving side of the circuit breaker and the crank arm box assembled together are sent to the next assembly link, and the moving contact in the moving side of the circuit breaker still needs to adjust the extension length in the next link, which affects the overall assembly efficiency of the circuit breaker. SUMMARY

[0004] The present application aims to solve one of the technical problems in the related art to some extent. To this end, the present application provides an automatic adjustment device and an automatic adjustment method.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: an automatic adjustment device, comprising:

[0006] a detection head provided with an internal tooth structure for cooperating with the gear on the crank arm box;

[0007] a first driving assembly connected with the detection head and used for driving the detection head to rotate;

[0008] a second driving assembly connected with the first driving assembly and used for driving the first driving assembly and the detection head to move back and forth along a set direction;

[0009] a detection unit for detecting the moving stroke of the moving contact in the circuit breaker; and,

[0010] a marking assembly arranged on the first driving assembly;

[0011] The marking assembly is used to draw a line on the predetermined position of the crankcase when the moving stroke of the movable contact in the circuit breaker reaches the set stroke.

[0012] The application has the following beneficial effects: the first driving assembly and the testing head can be driven by the second driving assembly to move in the set direction to make the testing head abut against the gear on the crankcase, then the testing head can be driven by the first driving assembly to rotate at the first set rotating speed until the testing head meshes with the gear, thereby realizing the automatic meshing of the testing head and the gear. Then the testing head can be driven by the first driving assembly to rotate at the second set rotating speed, and the moving stroke of the movable contact can be detected by the detection unit, and the testing head can be controlled to stop rotating when the moving stroke of the movable contact reaches the set stroke. Finally, the marking assembly is used to draw a line on the predetermined position of the crankcase. Through the above operations, the automatic detection of the assembly condition of the movable side of the circuit breaker and the crankcase can be realized, and the detection efficiency and accuracy can be improved compared with the manual detection in the prior art. In addition, the marking assembly can draw a line on the predetermined position of the crankcase when the moving stroke of the movable contact reaches the set stroke, and the state can be kept to directly enter the next assembly link, and the crank can be directly installed at the gear, thereby improving the assembly efficiency and accurately marking the reference state of the movable side of the circuit breaker.

[0013] Optionally, the marking assembly comprises a driving unit and a marking pen driven by the driving unit to act, and the driving unit is used to drive the marking pen to act to draw a line on the crankcase.

[0014] Optionally, the driving unit comprises a first linear driver and a second linear driver, the marking pen is arranged on the output end of the first linear driver and can reciprocate along the set direction under the driving of the first linear driver; the output end of the second linear driver is connected with the first linear driver and is used to drive the first linear driver and the marking pen to reciprocate along the predetermined direction, and the predetermined direction is perpendicular to the set direction.

[0015] Optionally, the marking assembly further comprises a mounting seat and a mounting frame, the second linear driver is fixedly arranged on the first driving assembly through the mounting seat, and the marking pen is fixedly mounted on the output end of the first linear driver through the mounting frame.

[0016] Optionally, the detection unit comprises a laser sensor, and the emitting end of the laser sensor is aligned with the end of the movable contact of the circuit breaker.

[0017] Optionally, the first driving assembly comprises a driving motor and a transmission mechanism driven by the driving motor, and the testing head is arranged at one end of the transmission mechanism away from the driving motor; the second driving assembly comprises a sliding table and a bearing seat driven by the sliding table, and the first driving assembly is arranged on the bearing seat.

[0018] Optionally, the transmission mechanism comprises:

[0019] a limiting cylinder arranged on the bearing seat;

[0020] a driving shaft connected with the driving motor and extending into the limiting cylinder;

[0021] a transmission shaft extending into the limiting cylinder and being in spline cooperation with the driving shaft; and

[0022] a resilient member arranged between the driving shaft and the transmission shaft and pressing the transmission shaft so that the transmission shaft has a tendency to be separated from the limiting cylinder;

[0023] wherein a limiting structure for limiting the transmission shaft from being separated from the limiting cylinder is arranged between the limiting cylinder and the transmission shaft, and the testing head is arranged at one end of the transmission shaft extending out of the limiting cylinder.

[0024] Optionally, one end of the transmission shaft extending into the limiting cylinder is provided with a spline groove, the driving shaft extends into the spline groove and is in spline cooperation with the transmission shaft, the resilient member is a compression spring, and two ends of the compression spring are respectively in abutment with a bottom wall of the spline groove and an end portion of the driving shaft.

[0025] Optionally, the first driving assembly further comprises a torque sensor arranged between an output shaft of the driving motor and the transmission mechanism, and the torque sensor is used for detecting a torque difference when the testing head idles and when the testing head drives the load to rotate.

[0026] In addition, the application further provides an automatic calibration method, which is realized by using the automatic calibration device according to any one of the above technical solutions, and the automatic calibration method comprises the following steps:

[0027] S100: moving the first driving assembly and the testing head in a set direction to abut the testing head with the gear on the crankcase by the second driving assembly;

[0028] S200: driving the testing head to rotate at a first set rotating speed by the first driving assembly until the testing head is engaged with the gear;

[0029] S300: detecting a moving stroke of the moving contact by the detection unit, and driving the testing head to rotate at a second set rotating speed by the first driving assembly until the moving stroke of the moving contact reaches a set stroke;

[0030] S400: Draw lines at predetermined positions on the crank arm box using the marking component.

[0031] The automatic calibration method provided in this application is similar to the reasoning process of the beneficial effects of the aforementioned automatic calibration device, and will not be repeated here.

[0032] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0033] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0034] Figure 1 This is a schematic diagram of the structure of an automatic calibration device provided in an embodiment of this application;

[0035] Figure 2 Schematic diagram of the application of the automatic calibration device Figure 1 ;

[0036] Figure 3 Schematic diagram of the application of the automatic calibration device Figure 2 ;

[0037] Figure 4 Schematic diagram of the application of the automatic calibration device Figure 3 ;

[0038] Figure 5 This is a schematic diagram of the marking component in the automatic calibration device;

[0039] Figure 6 An exploded view of the labeled components;

[0040] Figure 7 A schematic diagram showing the marked components on the crank arm box after lines have been drawn.

[0041] Figure 8 Exploded views of the first and second drive components;

[0042] Figure 9 This is an exploded view of the transmission mechanism;

[0043] Figure 10 This is a sectional view of the transmission mechanism.

[0044] The components include: 1. First drive assembly; 10. Drive motor; 11. Reducer; 12. Torque sensor; 13. Coupling; 14. Transmission mechanism; 140. Limiting cylinder; 1400. Limiting flange; 141. Drive shaft; 142. Transmission shaft; 1420. Spline groove; 1421. Limiting flange; 143. Elastic element; 2. Second drive assembly; 20. Slide table; 21. Bearing seat; 22. Limit switch; 3. Calibration head; 30. Internal gear structure; 4. Detection unit; 5. Marking assembly; 50. Marking pen; 51. First linear actuator; 52. Second linear actuator; 53. Mounting seat; 54. Mounting bracket; 55. Mounting plate; 56. Marking line; 6. Base; 60. Assembly table; 61. Base; 62. Extension frame; 7. Circuit breaker moving side; 70. Moving contact; 8. Crank arm box; 80. Gear. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0046] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0047] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] This embodiment provides an automatic calibration device, such asFigure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the automatic calibration device includes a calibration head 3, a first drive assembly 1, a second drive assembly 2, a detection unit 4, and a marking assembly 5. The calibration head 3 is equipped with an internal gear structure 30 for engaging with a gear 80 on the crank arm housing 8. The first drive assembly 1 is connected to the calibration head 3 and drives it to rotate. The second drive assembly 2 is connected to the first drive assembly 1 and drives both the first drive assembly 1 and the calibration head 3 to reciprocate along a predetermined direction. Thus, the second drive assembly 2 can drive the first drive assembly 1 and the calibration head 3 to move along the predetermined direction until the calibration head 3 abuts against the gear 80 on the crank arm housing 8. Then, the first drive assembly 1 can drive the calibration head 3 to rotate at a first predetermined speed until the calibration head 3 meshes with the gear 80, thereby achieving automated meshing between the calibration head 3 and the gear 80.

[0050] In this embodiment, the detection unit 4 is used to detect the travel distance of the moving contact 70 in the circuit breaker. It can drive the verification head 3 to rotate at a second set speed via the first drive assembly 1. The moving contact 70 is moved by the gear 80 meshing with the verification head 3. The detection unit 4 can detect the travel distance of the moving contact 70. When the travel distance of the moving contact 70 reaches the set distance, the verification head 3 is controlled to stop rotating. Through the above operation, automated detection of the assembly status of the moving side 7 and the crank arm box 8 of the circuit breaker can be achieved. Compared with the manual verification operation in the prior art, this application can improve detection efficiency and accuracy.

[0051] In this embodiment, the marking component 5 is disposed on the first drive component 1. The marking component 5 is used to draw a line at a predetermined position on the crank arm box 8 when the moving contact 70 in the circuit breaker reaches a set stroke. By marking the predetermined position on the crank arm box 8 with the marking component 5 and maintaining this state to directly enter the next assembly stage, the crank arm can be directly installed at the gear 80, improving assembly efficiency while also accurately marking the reference state of the moving side 7 of the circuit breaker.

[0052] Combination Figure 5 and Figure 6As shown, the marking component 5 in this embodiment includes a driving unit and a marking pen 50 driven by the driving unit. The driving unit is used to drive the marking pen 50 to draw lines on the crank arm box 8. Specifically, the driving unit in this embodiment includes a first linear driver 51 and a second linear driver 52. The marking pen 50 is disposed at the output end of the first linear driver 51 and can reciprocate along a set direction under the drive of the first linear driver 51. The output end of the second linear driver 52 is connected to the first linear driver 51 and is used to drive the first linear driver 51 and the marking pen 50 to reciprocate along a predetermined direction, which is perpendicular to the set direction. By setting the first linear driver 51 to drive the marking pen 50 to move along the set direction, the marking pen 50 can be driven to move away from the gear 80 before the connector meshes with the gear 80, ensuring that the marking pen 50 does not interfere with the end face structure of the crank arm box 8; it can also be driven to move closer to the gear 80 after the moving contact 70 moves to the set stroke, so that the marking pen 50 can contact the end face of the crank arm box 8, so that lines can be drawn on the crank arm box 8. By setting the second linear driver 52, the marker pen 50 can be moved in a predetermined direction to complete the line drawing action.

[0053] Furthermore, the marking component 5 in this embodiment also includes a mounting base 53 and a mounting bracket 54. The second linear driver 52 is fixedly mounted to the first drive component 1 via the mounting base 53, and the marking pen 50 is fixedly mounted to the output end of the first linear driver 51 via the mounting bracket 54. Specifically, the mounting base 53 in this embodiment is a clamp, and the first drive component 1 includes a shaft structure for driving the coupling joint. The mounting base 53 is sleeved and fixed outside the aforementioned shaft structure, so that the marking component 5 is mounted on the first drive component 1 via the mounting base 53 and can move and rotate synchronously with the coupling joint. In addition, in this embodiment, a mounting plate 55 is also provided at the output end of the second linear driver 52, and the first linear driver 51 is fixedly mounted on the mounting plate 55.

[0054] Combination Figures 1 to 7 As shown, the automatic calibration method using the automatic calibration device provided in this embodiment will be described. The automatic calibration method includes the following steps:

[0055] Step S100: Drive the first drive assembly 1 and the calibration head 3 along the set direction by the second drive assembly 2 so that the calibration head 3 abuts against the gear 80 on the crank arm box 8;

[0056] Step S200: The first drive assembly 1 drives the calibration head 3 to rotate at a first set speed until the calibration head 3 meshes with the gear 80, thus obtaining... Figure 3 The state shown;

[0057] Step S300: The movement stroke of the moving contact 70 is detected by the detection unit 4, and the first drive assembly 1 drives the calibration head 3 to rotate at a second set speed until the movement stroke of the moving contact 70 reaches the set stroke, thus obtaining... Figure 4 The state shown;

[0058] Step S400: Draw a line at a predetermined position on the crank arm box 8 using the marking component 5 to obtain... Figure 7 The state shown is marked with line 56 on the crank arm box 8.

[0059] It should be noted that the first set rotational speed described in this embodiment is a selected value between 0.5 r / min and 2.5 r / min. It is easy to understand that the first set rotational speed is a relatively small value to ensure that the calibration head 3 can smoothly mesh with the gear 80. The second set rotational speed does not need to be particularly limited, as long as it allows the moving contact 70 to move at a speed approximately equal to the actual moving speed under working conditions.

[0060] The detection unit 4 in this embodiment includes a laser sensor, the emitting end of which is aligned with the end of the moving contact 70 of the circuit breaker. The laser sensor can accurately measure the extension and retraction stroke of the circuit breaker.

[0061] Combination Figure 8 , Figure 9 and Figure 10 As shown, the first drive assembly 1 in this embodiment includes a drive motor 10 and a transmission mechanism 14 driven by the drive motor 10. The calibration head 3 is disposed on the transmission mechanism 14 at the end away from the drive motor 10. With this structural design, the power of the drive motor 10 can be transmitted to the calibration head 3 through the transmission mechanism 14, causing the calibration head 3 to rotate. The second drive assembly 2 in this embodiment includes a slide 20 and a support base 21 driven by the slide 20. The first drive assembly 1 is disposed on the support base 21. Combined with... Figure 1 and Figure 2 As shown, before using the automatic calibration device provided in this embodiment, the circuit breaker moving side 7 and the crank arm box 8 are first assembled using assembly equipment. After the circuit breaker moving side 7 and the crank arm box 8 are assembled, the automatic calibration device is used for calibration. The assembly equipment includes a base 6, which includes an assembly table 60, a base 61, and an extension frame 62. The circuit breaker moving side 7 and the crank arm box 8 are assembled on the assembly table 60. The detection unit 4 is disposed on the base 61, and the bearing seat 21 is disposed on the extension frame 62.

[0062] In this embodiment, the slide 20 is an electric slide 20, which can be controlled by turning the power on and off. In order to accurately control the movement stroke of the support 21, a limit switch 22 is also provided on the extension frame 62 in this embodiment. When the support 21 moves to contact the limit switch 22, a control signal can be fed back to the electric slide 20 and the electric slide 20 can be stopped.

[0063] Furthermore, the transmission mechanism 14 in this embodiment includes a limiting cylinder 140, a drive shaft 141, a transmission shaft 142, and an elastic element 143. The limiting cylinder 140 is disposed on the support base 21. The drive shaft 141 is connected to the drive motor 10 and extends into the limiting cylinder 140. The transmission shaft 142 extends into the limiting cylinder 140 and is splinedly engaged with the drive shaft 141. This splined engagement allows the transmission shaft 142 to not only rotate under the drive of the drive shaft 141 but also to move axially relative to the drive shaft 141. The elastic element 143 is disposed between the drive shaft 141 and the transmission shaft 142 and applies pressure to the transmission shaft 142 to induce a tendency for the transmission shaft 142 to disengage from the limiting cylinder 140. A limiting structure is provided between the limiting cylinder 140 and the transmission shaft 142 to prevent the transmission shaft 142 from disengaging from the limiting cylinder 140. The inspection head 3 is disposed at the end of the transmission shaft 142 extending out of the limiting cylinder 140.

[0064] It is easy to understand that when the inspection head 3 rotates to the point where the teeth in its internal gear structure 30 are misaligned with the teeth in the gear 80, the second drive assembly 2 can apply a thrust to the inspection head 3 to move it until it engages with the gear 80. However, the magnitude of this thrust is difficult to control and may cause impact damage between the inspection head 3 and the gear 80. In this embodiment, the transmission mechanism 14 is further designed so that it can not only transmit the rotational torque of the drive motor 10 to the inspection head 3, but also prevent impact damage between the inspection head 3 and the gear 80 through its internal elastic element 143. Specifically, when the second drive assembly 2 drives the inspection head 3 to move to abut against the gear 80, the elastic element 143 can further compress to prevent a rigid impact between the inspection head 3 and the gear 80. Then, when the inspection head 3 rotates to the point where it can engage with the gear 80, the elastic element 143 can apply pressure to the inspection head 3 to complete the engagement between the inspection head 3 and the gear 80.

[0065] like Figure 9 and Figure 10 As shown, the limiting structure in this embodiment includes a limiting flange 1400 and a limiting edge 1421. The limiting flange 1400 is disposed on the inner wall of the limiting cylinder 140, and the limiting edge 1421 is disposed at the edge of the transmission shaft 142. The limiting edge 1421 and the limiting flange 1400 abut against each other before the inspection head 3 abuts against the gear 80 to prevent the transmission shaft 142 from separating from the drive shaft 141.

[0066] In addition, in this embodiment, the end of the drive shaft 142 that extends into the limiting cylinder 140 is provided with a spline groove 1420, and the drive shaft 141 extends into the spline groove 1420 and is splinedly engaged with the drive shaft 142. The elastic element 143 is a compression spring, and the two ends of the compression spring abut against the bottom wall of the spline groove 1420 and the end of the drive shaft 141, respectively. Optionally, a positioning protrusion can also be provided at the end of the drive shaft 141, and one end of the compression spring can be sleeved over the positioning protrusion to improve the stability of the compression spring and prevent the compression spring from shaking.

[0067] In this embodiment, the first drive assembly 1 further includes a torque sensor 12 disposed between the output shaft of the drive motor 10 and the transmission mechanism 14. The torque sensor 12 is used to detect the torque difference between the oscillating head 3 and the oscillating head 3 driving the load to rotate. This torque difference can be used to determine whether the connection between the moving side 7 of the circuit breaker and the crank arm box 8 is qualified. Specifically, the torque difference between the oscillating head 3 and the oscillating head 3 driving the load to rotate can characterize the torque value required to drive the gear 80 to rotate. If this torque value is too large, it indicates that there is a jam in the transmission between the gear 80 and the moving contact 70.

[0068] like Figure 8 As shown, in this embodiment, a reducer 11 is provided at the output end of the drive motor 10, and a torque sensor 12 is provided between the reducer 11 and the transmission mechanism 14. The reducer 11 allows for more precise control of speed and torque. Couplings 13 are provided on both sides of the torque sensor 12 for connection. Specifically, connecting shafts are provided on both sides of the torque sensor 12. One connecting shaft is connected to the output shaft of the reducer 11 via a corresponding coupling 13, and the other connecting shaft is connected to the drive shaft 141 via a corresponding coupling 13.

[0069] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. An automatic tuning device, characterized in that, The automatic calibration device comprises: a testing head provided with an internal tooth structure for cooperating with a gear on the bell crank box; a first driving assembly connected with the testing head and used for driving the testing head to rotate; a second driving assembly connected with the first driving assembly and used for driving the first driving assembly and the testing head to reciprocate in a set direction; a detection unit used for detecting the moving stroke of the movable contact in the circuit breaker; and a marking assembly arranged on the first driving assembly; wherein the marking assembly is used for drawing a line on a predetermined position of the bell crank box when the moving stroke of the movable contact in the circuit breaker reaches a set stroke.

2. The automatic alignment device of claim 1, wherein The marking assembly comprises a driving unit and a marking pen driven by the driving unit to act, and the driving unit is used for driving the marking pen to act to draw a line on the bell crank box.

3. The automatic alignment device of claim 2, wherein The driving unit comprises a first linear driver and a second linear driver, the marking pen is arranged on the output end of the first linear driver and can reciprocate in the set direction under the driving of the first linear driver; the output end of the second linear driver is connected with the first linear driver and is used for driving the first linear driver and the marking pen to reciprocate in a predetermined direction perpendicular to the set direction.

4. The automatic alignment device of claim 3, wherein The marking assembly further comprises a mounting seat and a mounting frame, the second linear driver is fixedly arranged on the first driving assembly through the mounting seat, and the marking pen is fixedly mounted on the output end of the first linear driver through the mounting frame.

5. The automatic alignment device of any one of claims 1 to 4, wherein, The detection unit comprises a laser sensor, and the emitting end of the laser sensor is aligned with the end of the movable contact of the circuit breaker.

6. The automatic alignment device of any one of claims 1 to 4, wherein, The first driving assembly comprises a driving motor and a transmission mechanism driven by the driving motor to act, and the testing head is arranged on one end of the transmission mechanism away from the driving motor; The second driving assembly comprises a sliding table and a bearing seat driven by the sliding table to move, and the first driving assembly is arranged on the bearing seat.

7. The automatic alignment device of claim 6, wherein The transmission mechanism comprises: a limiting cylinder arranged on the bearing seat; a driving shaft connected with the driving motor and extending into the limiting cylinder; a transmission shaft extending into the limiting cylinder and spline-fitted with the driving shaft; and a resilient member arranged between the driving shaft and the transmission shaft and pressing the transmission shaft so that the transmission shaft has a tendency to be separated from the limiting cylinder; wherein a limiting structure for limiting the transmission shaft from being separated from the limiting cylinder is arranged between the limiting cylinder and the transmission shaft, and the testing head is arranged on one end of the transmission shaft extending out of the limiting cylinder.

8. The automatic calibration device as described in claim 7, characterized in that, One end of the transmission shaft extending into the limiting cylinder is provided with a spline groove, the driving shaft extends into the spline groove and is spline-fitted with the transmission shaft, the resilient member is a compression spring, and the two ends of the compression spring are respectively abutted with the bottom wall of the spline groove and the end of the driving shaft.

9. The automatic alignment device of claim 6, wherein, The first driving assembly further comprises a torque sensor arranged between the output shaft of the driving motor and the transmission mechanism, and the torque sensor is used for detecting the torque difference when the testing head idles and when the testing head drives the load to rotate.

10. A method of automatic tuning, implemented using the automatic tuning device according to any one of claims 1 to 9, characterized in that, The automatic calibration method comprises the following steps: S100: driving the first driving assembly and the testing head to move in a set direction until the testing head abuts against the gear on the bell crank box through the second driving assembly; S200: driving the testing head to rotate at a first set rotating speed by the first driving assembly until the testing head engages with the gear; S300: detecting the moving stroke of the moving contact by the detecting unit, and driving the testing head to rotate at a second set rotating speed by the first driving assembly until the moving stroke of the moving contact reaches a set stroke; S400: drawing a line at a predetermined position of the toggle box by the marking assembly.

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