A rotary torque converter

Abstract

This utility model belongs to the field of hardware component pitch adjustment and packaging technology, and particularly relates to a rotary pitch adjustment device. A rotary pitch adjustment device includes a support frame with a calibration plate mounted on it. Two sets of sliders slide on the calibration plate, each slider having a first positioning claw and a second positioning claw. A positioning block is fixedly connected to the calibration plate inside the sliders. Two pitch adjustment blocks are slidably mounted opposite each other in the middle of the positioning blocks. Compression springs are fixedly connected to the outer surfaces of the two pitch adjustment blocks and the end faces of the opposite positioning blocks. A guide block is mounted on the second positioning claw, which can slide within the positioning block. The device also includes a slider driving assembly, which drives the first and second positioning claws to open and close inwards. This utility model can efficiently and accurately adjust the pitch of hardware components such as mobile phone gaskets.

Description

Technical Field

[0001] This utility model belongs to the field of hardware pitch change and packaging technology, and particularly relates to a rotary correction pitch change device. Background Technology

[0002] In the production process of mobile phone components, mobile phone gaskets (see [reference]) Figure 11 After the metal parts (as shown) are electroplated on the strip, they need to be cut and packaged, that is, the parts cut from the strip are placed into the slots on the packaging carrier. Currently, the strip and the packaging carrier usually adopt a double-row structure, that is, the existing vacuum adsorption assembly places two parts cut from the strip into two slots on the packaging carrier at a time. In actual production, the spacing between the two parts on the strip and the spacing between the two slots are often inconsistent.

[0003] Existing processing methods mostly rely on variable-pitch mechanical structures or manual intervention to correct the position and adjust the spacing of the cut products. When using a variable-pitch mechanical structure, for example, Chinese utility model patent application number 202323071526.2 discloses a variable-pitch pick-and-place device, including: a driving component; a fixed plate connected to the output end of the driving component; a mounting base disposed on the upper surface of the fixed plate; a first variable-pitch mechanism disposed in the mounting base and extending downward; a first sliding component connected to the first variable-pitch mechanism; a plurality of first vacuum nozzles respectively disposed on the first sliding component; a support plate connected to the bottom of the fixed plate and near the front end; a second sliding component disposed at the front end of the support plate; a plurality of second vacuum nozzles respectively disposed on the second sliding component; and a second variable-pitch mechanism disposed on the support plate away from the second sliding component and respectively connected to the plurality of second vacuum nozzles.

[0004] Although the aforementioned existing patented technologies can achieve the variable pitch function, the product 1 in this application is a hardware component such as a mobile phone pad, which is small in size and difficult to apply. Furthermore, the existing variable pitch structure has limited precision control capabilities, making it difficult to accurately adjust the product's pitch to match the carrier tape cavity pitch. In addition, it is impossible to perform position correction on the product 1, which can easily lead to deviations when the product is placed into the carrier tape cavity, affecting packaging efficiency and quality.

[0005] While manual intervention can ensure accuracy to a certain extent, its efficiency is extremely low and cannot meet the demands of mass production of modern mobile phone components. With the rapid development of the mobile phone market, the requirements for production efficiency and quality of mobile phone components are becoming increasingly stringent. Existing technologies are no longer able to adapt to this development trend, and there is an urgent need for a device that can efficiently and accurately correct the orientation and pitch of hardware products such as mobile phone gaskets. Utility Model Content

[0006] To address the technical problems existing in the prior art, this application provides a rotary calibration and pitch changing device that can efficiently and accurately calibrate and change the pitch of hardware products such as mobile phone pads.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rotary torque converter includes a support frame with a horizontally mounted torque converter. Two sets of sliders slide opposite each other on the torque converter, with a first positioning claw and a second positioning claw fixedly connected to each set of sliders. A positioning block is fixedly connected to the torque converter inside the sliders. Two torque converter blocks slide opposite each other in the middle of the positioning blocks, and compression springs are fixedly connected to the outer surfaces of the two torque converter blocks and the end faces of the opposing positioning blocks. A guide block is mounted on the second positioning claw and can slide within the positioning block. The device also includes a slider driving assembly that drives the first and second positioning claws to open and close inwards. When the second positioning claw opens, the guide block disengages from between the two torque converter blocks. When the second positioning claw closes inwards, the guide block is inserted between the two torque converter blocks.

[0009] Preferably, a limiting block is fixedly connected to the upper end face of the calibration disk inside the slider, and the positioning block is fixedly connected to the upper end face of the limiting block. After the first positioning claw and the second positioning claw move inward, the inner end face of the slider abuts against the outer side of the limiting block.

[0010] Preferably, the slider driving assembly includes a tension spring embedded in the outer circumference of the calibration disk, a stepper motor vertically arranged below the calibration disk, and a four-axis rotary assembly arranged on the output shaft of the stepper motor; the four-axis rotary assembly includes a sleeve fixedly sleeved on the output shaft of the stepper motor, four vertically arranged fixed shafts evenly distributed on the sleeve, and rotary bearings arranged on the fixed shafts; the sleeve and each rotary bearing are rotatably arranged inside the calibration disk, and when each rotary bearing is located in the gap between two sliders, the first positioning claw and the second positioning claw move inward; when each rotary bearing abuts against the inner side of the corresponding slider, the first positioning claw and the second positioning claw open.

[0011] Preferably, a clearance groove is provided on the lower end face of the calibration plate, and a sliding groove is provided on the upper end face of the calibration plate. The clearance groove connects each sliding groove. The sleeve and the rotary bearing are rotatably disposed in the clearance groove, and each slider is slidably embedded in the corresponding sliding groove. An annular groove is provided on the outer circumference of the calibration plate, and the tension spring is embedded in the annular groove.

[0012] Preferably, the support frame includes a horizontal plate, a vertical plate fixedly connected to the horizontal plate, and a motor base fixedly connected horizontally to the vertical plate. The stepper motor is fixedly connected to the lower end of the motor base, and the calibration plate is fixedly connected to the upper end of the motor base.

[0013] Preferably, an oblong adjustment hole is provided on the upper part of the upright plate along its length, and a fastening bolt is horizontally inserted into the adjustment hole and threaded into the motor base to fix the motor base to the upright plate.

[0014] Preferably, waist-shaped positioning claw adjustment holes are respectively provided on the first positioning claw and the second positioning claw along their length direction, and fastening bolts are inserted into the positioning claw adjustment holes and threaded into the slider.

[0015] Preferably, a first groove is formed on the upper end face of the positioning block along the moving direction of the second positioning claw, and the guide block is slidably disposed in the first groove; a second groove is formed on the upper end face of the positioning block along the length direction perpendicular to the first groove, and the pitch block is slidably embedded in the second groove; and compression springs are fixedly connected to the outer sides of the two pitch blocks and the opposite end faces of the positioning blocks.

[0016] Preferably, the pitch block includes a pitch base and a stop block disposed on the pitch base. A third groove is formed on the positioning block below the second groove. The pitch base is slidably embedded in the third groove. The upper end of the stop block extends above the positioning block. Pitch block grooves are formed on the opposite end faces of the two pitch blocks. A compression spring is fixedly embedded in the pitch block groove. Guide slopes are respectively provided on the opposite end faces of the two pitch bases.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model uses a slider drive assembly to drive the first positioning claw, the second positioning claw, and the pitch block to open outward and move inward, thereby achieving precise correction and pitch adjustment for hardware products such as mobile phone pads. Combined with a double suction nozzle structure, it can automatically place two products cut off from the material strip into the packaging carrier after correction and pitch adjustment.

[0019] 2. The slider drive assembly of this utility model adopts a stepper motor, a four-axis rotary assembly and a tension spring working together. The stepper motor can accurately control the rotation angle and speed of the four-axis rotary assembly, providing a stable and accurate power source for the calibration and pitch change process. The four-axis rotary assembly and the calibration and pitch change assembly work together to achieve precise adjustment of product spacing and orientation correction.

[0020] This invention effectively solves the problem of inconsistent spacing between the product strip and the carrier tape cavity spacing. The device can quickly and accurately adjust the product spacing to match the carrier tape cavity spacing during the cutting and packaging process of metal parts such as mobile phone gaskets after electroplating, and perform product positioning correction. The process of product correction and spacing adjustment is highly automated, reducing reliance on manual labor, minimizing errors and uncertainties caused by manual operation, improving the stability and reliability of the production process, and meeting the efficiency and precision requirements of mass production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of this utility model after removing the support frame and the stepper motor.

[0024] Figure 4 for Figure 3 A schematic diagram of the structure after removing the positioning block and part of the first and second positioning claws.

[0025] Figure 5 A schematic diagram of the structure of the calibration disc of this utility model.

[0026] Figure 6 This is a schematic diagram of the connection structure of the positioning block and the correction block from the first and second perspectives of this utility model.

[0027] Figure 7 This is a schematic diagram of the connection structure of the pitch block and the return spring of this utility model.

[0028] Figure 8 This is a schematic diagram of the structure of the second positioning claw of this utility model.

[0029] Figure 9 This is a schematic diagram of the structure of the four-axis rotating assembly of this utility model.

[0030] Figure 10 This is a schematic diagram of the structure of the present invention when the first positioning claw and the second positioning claw move inward and open.

[0031] Figure 11 These are schematic diagrams of the product before and after the product's pitch is changed using this invention.

[0032] In the image: 1. Product

[0033] 2. Support frame; 21. Horizontal plate; 22. Vertical plate; 221. Vertical plate adjustment hole; 23. Motor base.

[0034] 3. Calibration plate; 31. Clearance groove; 32. Slide groove; 33. Annular groove.

[0035] 4. Pitch Adjustment Assembly; 41. Slider; 411. Guide Notch; 42. First Positioning Claw; 421. Positioning Claw Adjustment Hole; 43. Second Positioning Claw; 431. Guide Block; 44. Limiting Block; 45. Positioning Block; 451. First Groove; 452. Second Groove; 453. Third Groove; 46. Pitch Adjustment Block; 461. Pitch Adjustment Seat; 4611. Guide Inclined Surface; 462. Stop Block; 463. Pitch Adjustment Block Groove; 47. Compression Spring.

[0036] 5. Slider drive assembly; 51. Tension spring; 52. Stepper motor; 53. Sleeve; 54. Fixed shaft; 55. Rotary bearing.

[0037] 6. Vacuum adsorption assembly; 61. Suction nozzle. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. Example

[0040] See appendix Figure 1 , 2 As shown, a rotary torque converter includes a support frame 2, a torque converter 3 horizontally arranged on the support frame 2, a torque converter 4 arranged on the torque converter 3, and a slider drive assembly 5.

[0041] Specifically, the support frame 2 includes a horizontal plate 21, an upright plate 22 fixedly connected to the horizontal plate 21 by bolts, and a motor base 23 fixedly connected to the upright plate 22 horizontally. The calibration disc 3 is a disc-shaped structure and is fixedly connected to the upper end face of the motor base 23 by bolts.

[0042] Furthermore, in order to facilitate the adjustment of the position of the motor base 23 on the upright plate 22 and thus adjust the height of the motor base 23, an oblong upright plate adjustment hole 221 is provided on the upper part of the upright plate 22 along its length direction. The fastening bolt is horizontally inserted into the upright plate adjustment hole 221 and threaded into the motor base 23 to fix the motor base 23 on the upright plate 22.

[0043] See Figure 3 , 4 As shown, a calibration pitch-changing assembly 4 is provided on the calibration disk 3. The calibration pitch-changing assembly 4 includes a slider 41, a first positioning claw 42 and a second positioning claw 43, a limiting block 44, a positioning block 45, a pitch-changing block 46, and a compression spring 47. Two sets of four sliders 41 are slidably arranged opposite each other on the calibration disk 3. A first positioning claw 42 and a second positioning claw 43 are fixedly connected to each set of sliders 41. A limiting block 44 is fixedly connected to the upper end face of the calibration disk 3 inside the slider 41. A positioning block 45 is fixedly connected to the upper end face of the limiting block 43. Two pitch-changing blocks 46 are slidably arranged opposite each other in the middle of the positioning block 45. A compression spring 47 is fixedly connected to the outer side of the two pitch-changing blocks 46 and the end face of the opposite positioning block 45.

[0044] See Figure 5 As shown, a circular clearance groove 31 is provided on the lower end face of the calibration disk 3. The clearance groove 31 does not penetrate the upper end face of the calibration disk 3. A sliding groove 32 is provided on the upper end face of the calibration disk 3. The sliding grooves 32 are arranged in a cross shape. In order to improve the stability of the slider 41 sliding in the sliding groove 32, the sliding groove 32 and the slider 41 are correspondingly arranged convex structures. The clearance groove 31 connects all the sliding grooves 32. In addition, an annular groove 33 is provided on the outer circumference of the calibration disk 3.

[0045] See Figure 3 , 4 As shown, two first positioning claws 42 are disposed on two opposing sliders 41, and two second positioning claws 43 are disposed on two other opposing sliders 41. The sliding directions of the first positioning claws 42 and the second positioning claws 43 are perpendicular to each other. In this embodiment, in order to limit the first positioning claws 42 and the second positioning claws 43 when they move inward, a limiting block 44 is fixedly installed on the upper end face of the correction disc 3 inside each slider 41 by bolts. When the first positioning claws 42 and the second positioning claws 43 move inward, each slider 41 can abut against the outer end face of the limiting block 44 to limit the slider 41 and position the first positioning claws 42 and the second positioning claws 43.

[0046] Furthermore, in order to adjust the first positioning claw 42 and the second positioning claw 43 to improve the accuracy of product calibration and pitch change, waist-shaped positioning claw adjustment holes 421 are respectively opened on the first positioning claw 42 and the second positioning claw 43 along their length direction. Fastening bolts are inserted into the positioning claw adjustment holes 421 and threaded into the slider 41.

[0047] See Figure 6 , 7 As shown, a first groove 451 is provided on the upper end face of the positioning block 45 along the moving direction of the second positioning claw 43, and a second groove 452 is provided on the upper end face of the positioning block 45 along the length direction perpendicular to the first groove 451. The pitch block 46 is slidably embedded in the second groove 452, and a compression spring 47 is fixedly connected to the outer side of the two pitch blocks 46 and the end face of the opposite positioning block 45.

[0048] Specifically, in order to improve the smoothness and accuracy of the sliding of the pitch block 46, a third groove 453 is provided on the positioning block 45 below the second groove 452, and the third groove 453 is provided along the length direction of the second groove 452.

[0049] Specifically, the pitch block 46 includes a pitch base 461 located at the lower part and a stop block 462 disposed on the pitch base 461. The pitch base 461 and the stop block 462 can be integrally formed, and the width of the stop block 462 is smaller than the width of the pitch base 461. The pitch base 461 is slidably embedded in the third groove 453 and the second groove 452, and the upper end of the stop block 462 extends above the positioning block 45 to adjust the pitch of the product 1. Pitch block grooves 463 are formed on the end faces of the pitch bases 461 that are opposite to each other. A compression spring 47 is fixedly embedded in the pitch block groove 463, and one end of the compression spring 47 outside the pitch block groove 463 abuts against the groove wall of the third groove 453, and the compression spring 47 is in a compressed state.

[0050] In order to facilitate the insertion of the second positioning claw 43 between the two pitch blocks 46 so that the two pitch blocks 46 can move away from each other and thus the outer end faces of the two pitch blocks 46 can abut against the product 1 to realize the pitch change of the product 1, guide slopes 4611 are respectively provided on the opposite end faces of the two pitch seats 461.

[0051] See Figure 8 The second positioning claw 43 is integrally formed with a guide block 431. The guide block 431 is arranged along the moving direction of the second positioning claw 43. The guide block 431 can slide in the first groove 451 on the positioning block 45 and can be inserted between the two pitch blocks 46.

[0052] See Figure 2 , 9 As shown in Figures 1 and 10, in order to drive the first positioning claw 42 and the second positioning claw 43 to open and move inward, this correction pitch device also includes a slider drive assembly 5.

[0053] Specifically, the slider drive assembly 5 includes an annular tension spring 51 embedded in the annular groove 33 on the calibration plate 3, a stepper motor 52 vertically fixed to the lower end face of the motor base 23 below the calibration plate 3 by bolts, and a four-axis rotation assembly set on the output shaft of the stepper motor 52.

[0054] The four-axis rotary assembly includes a sleeve 53 fixedly mounted on the output shaft of a stepper motor 52, four vertically fixed shafts 54 evenly distributed on the sleeve 53, and rotary bearings 55 mounted on the fixed shafts 54. The sleeve 53 is coaxially mounted with the output shaft of the stepper motor 52 and the calibration disk 3. The inner ring of the rotary bearing 55 is fixedly mounted on the fixed shaft 54, and its outer ring is rotatable and can abut against the slider 41.

[0055] Sleeve 53, fixed shaft 54, and each rotary bearing 55 are rotatably mounted in the clearance groove 31 of the calibration disk 3. When each rotary bearing 55 is located within the gap between two sliders 41, see [reference needed]. Figure 10 In the left-hand view, the first positioning claw 42 and the second positioning claw 43 move inward under the elastic action of the tension spring 51. The guide block 431 is inserted between the two pitch blocks 46, and the two pitch blocks 46 move in opposite directions. At this time, the pitch change and correction of product 1 can be completed. When each rotary bearing 55 is driven by the stepper motor 52 to rotate around the output shaft driven by the stepper motor 52, it abuts against the inner end face of the corresponding slider 41, and the first positioning claw 42 and the second positioning claw 43 open. (See...) Figure 10 In the right-side view, the guide block 431 disengages from the two pitch blocks 46, and the two pitch blocks 46 move towards each other under the compression spring 47. At this time, the product 1 can be placed in the space enclosed by the first positioning claw 42, the two second positioning claws 43 and the pitch blocks 46.

[0056] Furthermore, in order to facilitate the rotation of the rotary bearing 55 from the gap between the two sliders 41 to the inner end face of the slider 41, so that each slider 41 moves away from the other, a guide notch 411 is provided on the inner end face of each slider near the rotary bearing 55, and the rotary bearing 55 rotates from the guide notch 411 to the inner end face of the slider 41.

[0057] The working principle and process of this embodiment are as follows:

[0058] 1. When it is necessary to correct the orientation and adjust the distance of the two cut products 1, the two products 1 are first picked up by the double suction nozzles 61 of the existing vacuum adsorption component 6 and moved above the adjustment and distance component 4. At this time, the positions of the two products 1 on the suction nozzles 61 are as follows: Figure 11 The left-side view above shows the nozzle 61 adsorbed in the middle of the two products 1;

[0059] 2. When the stepper motor 52 rotates clockwise, it drives the four-axis rotary assembly to rotate clockwise. The rotary bearing 55 on the four-axis rotary assembly rotates accordingly, pushing the four sliders 41 to move outward along the slide groove 32, thereby causing the two first grippers 42 and the two second grippers 43 to open. At this time, the guide block 431 disengages from the two pitch blocks 46, and the two pitch blocks 46 move to their initial position under the action of the compression spring 47. In this embodiment, the two pitch blocks 46 can abut against each other under the action of the compression spring 47. Figure 10 In the middle, the slider 41 changes from the inward closing state in the left view of the figure to the open state in the right view of the figure; then, the double suction nozzle 61 of the vacuum adsorption component 6 puts the product 1 into the two spaces formed by the first positioning claw 42, the second positioning claw 43 and the variable distance block 46.

[0060] 3. When the stepper motor 52 reverses (rotates counterclockwise), the four-axis rotary assembly rotates counterclockwise, and the rotary bearing 55 on the four-axis rotary assembly rotates accordingly. At this time, the rotary bearing 55 rotates back into the gap between the two sliders 41. The rotary bearing 55 no longer pushes the sliders 41. At this time, relying on the elastic force of the tension spring 51, the four sliders 41 move towards each other until the inner end face of the slider 41 abuts against the limiting block 44. The retraction of the slider 41 drives the first positioning claw 42 and the second positioning claw 43 to move inward. The guide block 4 on the second positioning claw 43... 31 is re-inserted between the two pitch blocks 46, causing the two pitch blocks 46 to move away from each other; during the inward movement of the first positioning claw 42 and the second positioning claw 43 and the movement of the two pitch blocks 46, the outer end faces of the stops 462 of the two pitch blocks 46 and the inner end faces of the first positioning claw 42 and the second positioning claw 43 respectively abut against the product 1, thereby realizing the correction and pitch change of the two products 1. During the correction and pitch change process, the product 1 is always adsorbed by the suction nozzle 61 of the vacuum adsorption component 6. The position of the product 1 on the suction nozzle 61 after the pitch change is shown in the figure. Figure 11 The right-side view shows that the distance between the two products 1 increases, making the distance between the two products 1 the same as the distance between the carrier belt acupoints.

[0061] Repeating the above process can automatically and in batches achieve the correction and pitch change of two products 1. It should be noted that this utility model also involves a control device. The connection method and control principle of the control device and each component are existing technologies. Anything not described in this specification is existing technology and will not be elaborated here. As long as the above working process can be met, it is acceptable.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary correction variable pitch device comprising a support frame, characterised in that: A calibration disc is horizontally arranged on the support frame; Two sets of sliders are arranged opposite each other on the calibration plate, and a first positioning claw and a second positioning claw are fixedly connected to each set of sliders. A positioning block is fixedly connected to the calibration plate inside the slider. Two opposing variable pitch blocks are slidably arranged in the middle of the positioning block. Compression springs are fixedly connected to the outer surfaces of the two variable pitch blocks and the end faces of the opposing positioning blocks. A guide block is provided on the second positioning claw, and the guide block can slide inside the positioning block; It also includes a slider driving assembly, which can drive each of the first positioning claws and the second positioning claws to open and move inward; when the second positioning claw opens, the guide block disengages from between the two pitch blocks; When the second positioning claw moves inward, the guide block is inserted between the two pitch blocks.

2. A rotary correction variable pitch device according to claim 1, wherein: A limiting block is fixedly connected to the upper end face of the calibration disk inside the slider. The positioning block is fixedly connected to the upper end face of the limiting block. After the first positioning claw and the second positioning claw move inward, the inner end face of the slider abuts against the outer side of the limiting block.

3. A rotary correction variable pitch device according to claim 2, wherein: The slider driving assembly includes a tension spring embedded in the outer circumference of the calibration disk, a stepper motor vertically arranged below the calibration disk, and a four-axis rotary assembly arranged on the output shaft of the stepper motor. The four-axis rotary assembly includes a sleeve fixedly sleeved on the output shaft of the stepper motor, four vertically arranged fixed shafts evenly distributed on the sleeve, and rotary bearings arranged on the fixed shafts. The sleeve and each rotary bearing are rotatably arranged inside the calibration disk. When each rotary bearing is located in the gap between two sliders, the first positioning claw and the second positioning claw move inward. When each rotary bearing abuts against the inner side of the corresponding slider, the first positioning claw and the second positioning claw open.

4. The rotary correction pitch device according to claim 3, characterized in that: A clearance groove is provided on the lower end face of the calibration plate, and a sliding groove is provided on the upper end face of the calibration plate. The clearance groove connects each sliding groove. The sleeve and the rotary bearing are rotatably disposed in the clearance groove, and each slider is slidably embedded in the corresponding sliding groove. An annular groove is provided on the outer circumference of the calibration plate, and the tension spring is embedded in the annular groove.

5. The rotary correction variable pitch device of claim 1, wherein: The support frame includes a horizontal plate, a vertical plate fixedly connected to the horizontal plate, and a motor base fixedly connected horizontally to the vertical plate. The stepper motor is fixedly connected to the lower end of the motor base, and the calibration plate is fixedly connected to the upper end of the motor base.

6. A rotary correction variable pitch device according to claim 5, wherein: An oblong adjustment hole is provided on the upper part of the upright plate along its length. A fastening bolt is horizontally inserted into the adjustment hole and threaded into the motor base to fix the motor base to the upright plate.

7. The rotary correction variable pitch device of claim 1, wherein: Waist-shaped positioning claw adjustment holes are respectively opened on the first positioning claw and the second positioning claw along their length direction. Fastening bolts are inserted into the positioning claw adjustment holes and threaded into the slider.

8. The rotary correction pitch device according to claim 1, characterized in that: A first groove is formed on the upper end face of the positioning block along the moving direction of the second positioning claw, and the guide block is slidably disposed in the first groove; a second groove is formed on the upper end face of the positioning block along the length direction perpendicular to the first groove, and the pitch block is slidably embedded in the second groove; a compression spring is fixedly connected to the outer side surface of the two pitch blocks and the end face of the opposite positioning block.

9. A rotary correction variable pitch device according to claim 8, wherein: The pitch block includes a pitch base and a stop block disposed on the pitch base. A third groove is provided on the positioning block below the second groove. The pitch base is slidably embedded in the third groove. The upper end of the stop block extends above the positioning block. Pitch block grooves are provided on the opposite end faces of the two pitch blocks. A compression spring is fixedly embedded in the pitch block groove. Guide slopes are provided on the opposite end faces of the two pitch bases.

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