Needle Calibration Device

Abstract

The present invention provides a needle winding calibration device, comprising a fixed seat, a sleeve, a driving unit and a calibration shaft, wherein the fixed seat is provided with a mounting hole and a measuring position group, wherein the measuring position group comprises more than two measuring positions, wherein the more than two measuring positions are distributed in a direction parallel to the axial direction of the mounting hole, wherein each measuring position is provided with a locking unit, wherein the locking unit is used to clamp a measuring tool, wherein the sleeve is slidably mounted on the fixed seat along its own axial direction, wherein the sleeve is coaxially arranged with the mounting hole, wherein the driving unit is mounted on the fixed seat, wherein the output end of the driving unit is connected with the sleeve, wherein the driving unit drives the sleeve to move toward or away from the mounting hole, and wherein the two ends of the calibration shaft are detachably connected with the mounting hole and the sleeve, respectively. The needle winding calibration device can assist the needle winding in calibration.

Description

Technical Field

[0001] The invention relates to the technical field of calibration instruments, in particular to a winding needle calibration device. Background Art

[0002] At present, the battery cell winding is generally completed by the cell winding machine, which forms the cell by stacking, winding and affixing the termination glue on the positive electrode sheet, negative electrode sheet and separator in a certain order. Since the coaxiality of the cell is one of the important indicators for judging the quality of the cell, and the winding needle is the main component for winding the positive electrode sheet, negative electrode sheet and separator, the coaxiality of the cell winding is mainly affected by the winding needle. Whether the coaxiality of the winding needle meets the winding requirements will directly determine whether the wound cell meets the standards.

[0003] In addition, since a battery cell winding machine can usually meet the winding processing of battery cells of various specifications, a battery cell winding machine may be equipped with a variety of winding needles of different diameters, and each winding needle needs to be tested for coaxiality before use. For winding needles with small diameters, micrometers can be used for measurement, but since the telescopic range of the micrometer is generally only 25 mm, when the diameter of the winding needle is greater than 25 mm, the micrometer cannot be used for measurement. Since there is currently no special instrument for measuring the coaxiality of the winding needle, when the diameter of the winding needle is greater than 25 mm, a three-dimensional coordinate measuring machine is generally used to measure the diameter of the winding needle. Although the three-dimensional coordinate measuring machine has the advantages of high measurement accuracy and high intelligence, it usually takes a long time to measure parts using a three-dimensional measuring machine, resulting in low measurement efficiency, and it needs to be operated by experienced professional engineers, which is inconvenient to use. Summary of the invention

[0004] In order to solve the above problems, the main purpose of the present invention is to provide a winding needle calibration device for assisting the winding needle in calibration.

[0005] In order to achieve the main purpose of the present invention, the present invention provides a winding needle calibration device, which includes a fixed seat, a sliding sleeve, a driving unit and a calibration shaft. The fixed seat is provided with a mounting hole and a measuring position group. The measuring position group includes more than two measuring positions, and the more than two measuring positions are distributed in a direction parallel to the axial direction of the mounting hole. A locking unit is provided on each measuring position, and the locking unit is used to install a measuring tool. The sliding sleeve is slidably mounted on the fixed seat along its own axial direction, and the sliding sleeve is coaxially arranged with the mounting hole. The driving unit is mounted on the fixed seat, and the output end of the driving unit is connected to the sliding sleeve. The driving unit drives the sliding sleeve to move toward or away from the mounting hole, and the two ends of the calibration shaft are respectively detachably connected to the mounting hole and the sliding sleeve.

[0006] As can be seen from the above, the mounting holes on the drive unit, the sleeve and the fixed seat cooperate to achieve clamping of the calibration shaft or the winding needle to be measured, and the measuring position is used to provide a measurement reference for the measuring tool, and the measuring tool is locked and fixed through the locking unit, so that the measuring tool can calibrate its own zero point through the calibration shaft, and the measuring tool can measure the winding needle to be measured. Among them, setting more than two measuring positions allows the winding needle calibration device to measure at least two or more parts of the winding needle to be measured, meeting the calibration requirements of the winding needle to be measured. In addition, the measuring tool can be configured by the winding needle calibration device itself, or an existing measuring tool can be used, and the measuring tool can use a depth micrometer, a vernier calibrator, etc.

[0007] A preferred solution is that the winding needle calibration device also includes a measuring tool, which is a depth micrometer. The depth micrometer is detachably mounted at the measuring position, and a measuring rod of the depth micrometer is arranged perpendicular to the axis of the mounting hole.

[0008] It can be seen from the above that the winding needle calibration device can better improve the placement accuracy of the measuring tool on the measuring position by configuring the measuring tool by itself, thereby improving the measurement accuracy of the winding needle calibration device.

[0009] A further solution is that the locking unit includes a stopper and a locking assembly, the stopper is detachably engaged with a first end of a base of the depth micrometer, and the locking assembly can fix a second end of the base on a fixing seat.

[0010] As can be seen from the above, the stopper is used to position one end of the base of the depth micrometer, and the locking assembly is used to cooperate with the stopper to fix the depth micrometer on the fixed seat. The depth micrometer is displaced during use, thereby ensuring the measurement accuracy of the winding needle calibration device.

[0011] A further solution is that the locking assembly includes a first bracket and a locking rod, the first bracket is fixedly mounted on a fixed seat, the locking rod is slidably connected to the first bracket along its own axial direction, the locking rod is parallel to the measuring rod, and the locking rod is detachably abutted against the second end of the base.

[0012] As can be seen from the above, the structural design of the locking assembly is conducive to the rapid disassembly and assembly of the depth micrometer.

[0013] A further solution is that the number of the measurement position groups is two, and the two measurement position groups are respectively located on two opposite sides of the axis of the mounting hole.

[0014] As can be seen from the above, setting the number of measurement groups to two groups enables the winding needle calibration device to measure two different parts of the winding needle under test in the same circumferential direction, so as to obtain multiple groups of measurement data in one measurement, thereby improving the measurement accuracy of the winding needle calibration device.

[0015] A further solution is that the depth micrometer includes a plurality of measuring rods, the plurality of measuring rods are detachably connected to the measuring mechanism of the depth micrometer, and the plurality of measuring rods have different lengths.

[0016] As can be seen from the above, the depth micrometer is equipped with multiple detachable measuring rods, so that the depth micrometer can select a suitable measuring rod according to the different diameters of the winding needle to be measured, thereby improving the application range of the winding needle calibration device.

[0017] Another preferred solution is that more than two calibration disks are provided on the calibration shaft, the more than two calibration disks are distributed along the axial direction of the calibration shaft, and the more than two calibration disks correspond one-to-one to the more than two measuring positions.

[0018] As can be seen from the above, since the calibration shaft is used to assist the measuring tool in zero point calibration, a high surface accuracy needs to be maintained. By providing a calibration disk on the calibration shaft, the finishing area of ​​the calibration shaft can be effectively reduced, thereby reducing the production cost of the winding needle calibration device.

[0019] Another preferred solution is that a shaft sleeve is provided on the mounting hole, and a linear bearing, a copper sleeve or a boundary lubrication bearing is provided between the sliding sleeve and the fixed seat.

[0020] As can be seen from the above, the arrangement of the sleeve in the mounting hole can not only ensure the assembly accuracy between the calibration shaft, the winding needle to be measured and the fixed seat, but also prevent the body of the fixed seat from being directly worn, thereby reducing the use cost of the winding needle calibration device and increasing the service life of the winding needle calibration device. Similarly, the arrangement of a linear bearing, a copper sleeve or a boundary lubrication bearing between the sliding sleeve and the fixed seat can not only ensure the assembly accuracy between the sliding sleeve and the fixed seat, but also prevent the body of the fixed seat from being directly worn, and the linear bearing, the copper sleeve or the boundary lubrication bearing can also reduce the friction force on the sliding sleeve when it slides relative to the fixed seat.

[0021] A further solution is that a first bearing is arranged between the sleeve and the fixed seat, a second bearing is arranged between the linear bearing and the fixed seat, a second bearing is arranged between the copper sleeve and the fixed seat, or a second bearing is arranged between the boundary lubrication bearing and the fixed seat, and a one-way bearing is arranged between the sliding sleeve and the output end of the drive unit.

[0022] As can be seen from the above, the above structural design allows the measured winding needle to rotate relative to the fixed seat after being installed on the fixed seat, thereby realizing full-circumferential dynamic detection of the specific part of the measured winding needle, and can better and more freely measure any circumferential position of the specific part.

[0023] A further solution is that the drive unit includes a second bracket and a screw, the second bracket is fixedly mounted on the fixed seat, the screw is threadedly connected to the second bracket, the screw and the sleeve are coaxially arranged, and the screw and the sleeve are connected; or the drive unit includes a third bracket, a motor and a ball screw, the third bracket is fixedly mounted on the fixed seat, the motor is mounted on the third bracket, the screw end of the ball screw is connected to the motor shaft of the motor, and the nut of the ball screw is connected to the sleeve.

[0024] As can be seen from the above, the drive unit is used to drive the sleeve to move relative to the mounting hole to achieve clamping or loosening of the calibration shaft or the measured winding needle, and the drive unit can be designed to drive the sleeve manually or electrically as required. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the first embodiment of the winding needle calibration device of the present invention.

[0026] Figure 2 It is a structural schematic diagram of a depth micrometer of the first embodiment of the needle winding calibration device of the present invention.

[0027] Figure 3 It is a structural diagram of the calibration shaft of the first embodiment of the needle winding calibration device of the present invention.

[0028] Figure 4 1 is a diagram showing the use status of the first embodiment of the needle winding calibration device of the present invention.

[0029] Figure 5 It is a schematic cross-sectional view of the local structure of the second embodiment of the needle winding calibration device of the present invention.

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0031] The first embodiment of the needle winding calibration device:

[0032] Reference Figure 1 The winding needle calibration device 100 includes a fixing seat 1, a sliding sleeve 2, a driving unit 3, a calibration shaft 4 and a measuring tool.

[0033] The fixed seat 1 includes a frame 11 and a base 12. The frame 11 is installed on the base 12. A mounting hole is provided on the side of the frame 11 close to the base 12. The mounting hole is used to accommodate, position and support the first end of the calibration shaft 4 or the measured winding needle 10. In order to better ensure the assembly accuracy between the calibration shaft 4 or the measured winding needle 10 and the fixed seat 1 and reduce the finishing area of ​​the fixed seat 1, a shaft sleeve 111 is provided on the mounting hole. The shaft sleeve 111 is used to cooperate with the first end of the calibration shaft 4 or the measured winding needle 10 and play the above-mentioned accommodation, positioning and support effects. In addition, the shaft sleeve 111 is provided on the mounting hole to prevent the frame 11 of the fixed seat 1 from directly contacting the calibration shaft 4 or the measured winding needle 10, avoiding direct wear of the frame 11, thereby reducing the use cost of the winding needle calibration device 100 and increasing the service life of the winding needle calibration device 100.

[0034] The frame 11 is also provided with two groups of measuring positions 112, which are respectively located on opposite sides of the axis of the mounting hole, that is, one group of measuring positions 112 is provided on one side of the frame 11. Each group of measuring positions 112 includes two measuring positions 1121, which are distributed along a direction parallel to the axial direction of the mounting hole. The measuring positions 1121 are used to accommodate a measuring tool and provide a first mounting reference surface for the measuring tool, that is, to provide a mounting reference for the measuring tool. Each measuring position 1121 is provided with a through slot 113, which passes through the side of the frame 11 where the measuring position 1121 is located in the vertical direction of the axis of the mounting hole, and the through slot 113 is used for the measuring rod 53 of the measuring tool to pass through.

[0035] In addition, each measuring position 1121 is provided with a locking unit 13, which is used to install and clamp the measuring tool, so that the measuring tool can be fixed on the measuring position 1121, and the measuring tool does not loosen or fall off during the measurement process, thereby ensuring the accuracy and reliability of the measurement of the measuring tool. In this embodiment, the measuring tool is a depth micrometer 5, and preferably, the depth micrometer 5 is a digital depth micrometer, so that the user can more intuitively obtain the data measured by the depth micrometer 5.

[0036] Specifically, combined Figure 2The depth micrometer 5 includes a measuring mechanism 51, a base 52 and a plurality of measuring rods 53. The measuring mechanism 51 is mounted on the base 52. The base 52 has a second mounting reference surface. When the depth micrometer 5 is placed at the measuring position 1121, the second reference surface of the base 52 is adjacent to the first reference surface of the measuring position 1121. The measuring rods 53 pass through the through slot 113, and the measuring rods 53 are perpendicular to the axis of the mounting hole. The lengths of the plurality of measuring rods 53 are different, and each measuring rod 53 can be detachably connected to the measuring mechanism 51 separately, so that the measuring mechanism 51 can measure through the measuring rod 53 and display the measured data on the display panel. In this embodiment, there are four depth micrometers 5, and the four depth micrometers 5 correspond to the four measuring positions 1121 one by one. Each depth micrometer 5 has four measuring rods 53, and the measuring specifications corresponding to the four measuring rods 53 are 0-25 mm, 25-50 mm, 50-75 mm and 75-100 mm, respectively. Through the above four measuring rods 53, the depth micrometer 5 cooperates with the fixing seat 1 to achieve the purpose of measuring and calibrating the winding needles of different diameters. Among them, the detachable connection between the measuring rod 53 and the measuring mechanism 51 is preferably a threaded connection, a clamping connection or a magnetic connection.

[0037] The locking unit 13 includes a stopper 131 and a locking assembly 132. The stopper 131 is fixedly mounted on the frame 11, and a slot is formed between the stopper 131 and the frame 11. The first end of the base 52 of the depth micrometer 5 is detachably engaged in the slot. The locking assembly 132 includes a first bracket 1321 and a locking rod 1322. The first bracket 1321 is mounted on the frame 11. The locking rod 1322 is threadedly connected to the first bracket 1321 along its own axial direction, so that the locking rod 1322 moves relative to the first bracket 1321 along its own axial direction. In addition, the locking rod 1322 is parallel to the measuring rod 53 of the depth micrometer 5. The locking rod 1322 is used to abut against the second end of the base 52 of the depth micrometer 5 to cooperate with the stopper 131 to fix the depth micrometer 5 on the frame 11. The threaded connection structure between the locking rod 1322 and the first bracket 1321 enables the locking rod 1322 to have a locking function, thereby preventing the locking rod 1322 from loosening the clamping of the depth micrometer 5 due to vibration during the needle winding calibration device 100, thereby ensuring the reliability and measurement accuracy of the depth micrometer 5.

[0038] The sleeve 2 is slidably mounted on the frame 11 along its own axial direction, and the sleeve 2 is arranged on the side of the frame 11 opposite to the sleeve 111. The sleeve 2 is coaxially arranged with the mounting hole, and the sleeve 2 is used to cooperate with the sleeve 111 to clamp and position the calibration shaft 4 or the winding needle 10 to be measured, so as to ensure that the calibration shaft 4 or the winding needle 10 to be measured can be perpendicular to the measuring rod 53 of the depth micrometer 5. In order to reduce the friction force on the sleeve 2 when it is transferred relative to the frame 11 and improve the smoothness of the sliding of the sleeve 2, a copper sleeve 21 is arranged between the sleeve 2 and the frame 11. The copper sleeve 21 can not only ensure the assembly accuracy between the sleeve 2 and the frame 11, but also ensure the position accuracy of the sleeve 2, and can also prevent the frame 11 from being directly worn, thereby reducing the use cost of the winding needle calibration device 100 and improving the service life of the winding needle calibration device 100. As an alternative, the copper sleeve 21 may be replaced by a linear bearing or a boundary lubricated bearing. The functions and effects of the linear bearing or the boundary lubricated bearing are the same as those of the copper sleeve 21, so they will not be described in detail here.

[0039] The driving unit 3 is used to drive the sleeve 2 to move toward or away from the sleeve 111, so as to clamp or release the calibration shaft 4 or the measured winding needle 10. The driving unit 3 includes a second bracket 31 and a screw 32. The second bracket 31 is fixedly mounted on the frame 11. The screw 32 is threadedly connected to the second bracket 31. The end of the screw 32 is fixedly connected to the sleeve 2. The screw 32 is coaxially arranged with the sleeve 2. The screw 32 moves relative to the second bracket 31 along its own axial direction through its own rotation, thereby controlling the sleeve 2 to move toward or away from the sleeve 111.

[0040] Combination Figure 3 The calibration shaft 4 is used to calibrate the auxiliary depth micrometer 5 at zero point, and cooperate with the first reference surface of the measuring position 1121 to determine a measurement reference for the depth micrometer 5. The two ends of the calibration shaft 4 are detachably connected to the sleeve 111 and the sliding sleeve 2, respectively, so that when the depth micrometer 5 needs to be calibrated at zero point, the calibration shaft 4 is installed between the sleeve 111 and the sliding sleeve 2, and when the measured winding needle 10 needs to be measured, the calibration shaft 4 is taken out from between the sleeve 111 and the sliding sleeve 2 to replace the measured winding needle 10. Two calibration disks 41 are arranged on the calibration shaft 4, and the two calibration disks 41 are distributed along the axial direction of the calibration shaft 4, and one calibration disk 41 is arranged corresponding to one measuring position 1121, that is, one calibration disk 41 is located at one measuring position 1121, so that when the depth micrometer 5 is installed at the measuring position 1121, the measuring rod 53 of the depth micrometer 5 can move toward the calibration disk 41 and abut against the peripheral wall of the calibration disk 41. Since the calibration shaft 4 is used to assist the depth micrometer 5 in zero point calibration, it is required to have a higher surface accuracy. By providing a calibration disk 41 on the calibration shaft 4, the finishing area of ​​the calibration shaft 4 can be effectively reduced, thereby reducing the production cost of the winding needle calibration device 100.

[0041] The following combination Figure 4 The working principle of the needle winding calibration device 100 is described as follows:

[0042] When the winding needle needs to be measured and calibrated, first, insert the first end of the calibration shaft 4 into the sleeve 111, and rotate the screw 32 so that the screw 32 drives the sleeve 2 to move toward the second end of the calibration shaft 4 until the sleeve 2 is sleeved on the second end of the calibration shaft 4 and fixes the calibration shaft 4 between the sleeve 111 and the sleeve 2.

[0043] Next, install a depth micrometer 5 on each measuring position 1121. During installation, the first end of the base 52 of the depth micrometer 5 is clamped on the stopper 131, and then the locking rod 1322 of the locking assembly 132 is twisted to make the locking rod 1322 abut against the second end of the base 52 until the base 52 fits with the frame 11 without looseness.

[0044] Next, the measuring mechanism 51 of the depth micrometer 5 is adjusted so that the measuring mechanism 51 drives the measuring rod 53 to move toward the calibration disk 41 of the calibration shaft 4. When the measuring rod 53 contacts a corresponding calibration disk 41, the current operation of adjusting the measuring mechanism 51 is continued until the twisting ring of the depth micrometer 5 sounds three times, and then the depth micrometer 5 is reset to zero so that the depth micrometer 5 records the position as the zero point. Each depth micrometer 5 performs this step.

[0045] Next, the measuring mechanism 51 and the screw 32 of the depth micrometer 5 are adjusted in reverse to remove the calibration shaft 4 from between the sleeve 111 and the sliding sleeve 2, and then the first end of the measured winding needle 10 is installed into the sleeve 111, and the screw 32 is adjusted so that the screw 32 drives the sliding sleeve 2 to move toward the second end of the measured winding needle 10 until the sliding sleeve 2 is mounted on the second end of the measured winding needle 10 and fixes the measured winding needle 10 between the sleeve 111 and the sliding sleeve 2.

[0046] Next, the winding needle 10 to be measured is controlled so that the outer winding needle of the winding needle 10 to be measured is opened and the inner winding needle is closed. Subsequently, the measuring mechanism 51 of each depth micrometer 5 is adjusted so that the measuring mechanism 51 drives the measuring rod 53 to move toward the winding needle 10 to be measured until the measuring rod 53 contacts the outer winding needle of the winding needle 10 to be measured, and the data measured by each depth micrometer 5 is recorded, and it is determined whether the winding needle 10 to be measured meets the production requirements based on the measured data. If not, the winding needle 10 to be measured is calibrated and measured again. If it still does not meet the production requirements, the calibration and measurement steps are repeated until the winding needle 10 to be measured meets the production requirements. Among them, if the diameter of the calibration disk 41 is d mm and the diameter of the outer winding needle of the winding needle 10 to be measured is D mm, the data measured by the depth micrometer 5 is (Dd) / 2 mm.

[0047] It should be noted that if the winding needle calibration device 100 does not have its own measuring tool, the existing measuring tool can be used in conjunction with the winding needle calibration device 100 to measure the winding needle. The measuring tool can be a depth micrometer 5, a vernier caliper, or other measuring tools with the same function.

[0048] In summary, the present invention, through the structural design of the winding needle calibration device 100, enables the winding needle calibration device 100 to meet the calibration requirements of winding needles of different diameters and to measure winding needles with a diameter greater than 25 mm.

[0049] Second embodiment of the needle winding calibration device:

[0050] Reference Figure 5 The difference between this embodiment and the first embodiment of the needle winding calibration device lies in the different structure of the driving unit. Specifically, in this embodiment, the driving unit 6 includes a third bracket 61, a motor 62 and a ball screw 63. The third bracket 61 is mounted on the frame 71, and the motor 62 is mounted on the third bracket 61. The end of the screw 631 of the ball screw 63 is fixedly connected to the motor shaft of the motor 62, and the nut 632 of the ball screw 63 is fixedly connected to the sleeve 72, so that the motor 62 can drive the sleeve 72 to move toward or away from the sleeve through the ball screw 63, and this structural design can realize the automatic control of the sleeve 72 by the driving unit 6.

[0051] The third embodiment of the needle winding calibration device:

[0052] The difference between this embodiment and the first embodiment or the second embodiment of the needle winding calibration device is that:

[0053] A first bearing is arranged between the shaft sleeve and the frame, a second bearing is arranged between the copper sleeve and the frame, and a one-way bearing is arranged between the sliding sleeve and the output end of the driving unit. This structural design enables the measured winding needle to rotate relative to the fixed seat after being installed between the shaft sleeve and the sliding sleeve, thereby realizing full-circumferential dynamic detection of a specific part of the measured winding needle, and any circumferential position of the specific part can be measured better and more freely.

[0054] If a linear bearing is used to replace the copper sleeve, the second bearing is arranged between the linear bearing and the frame; if a boundary lubrication bearing is used to replace the copper sleeve, the second bearing is arranged between the boundary lubrication bearing and the frame.

[0055] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The needle winding calibration device is characterized in that: include: A fixing seat, wherein the fixing seat is provided with a mounting hole and a measuring position group, wherein the measuring position group includes more than two measuring positions, and the more than two measuring positions are distributed along a direction parallel to the axial direction of the mounting hole, and each measuring position is provided with a locking unit, and the locking unit is used to install a measuring tool; A sliding sleeve, wherein the sliding sleeve is slidably mounted on the fixing seat along its axial direction, and the sliding sleeve is coaxially arranged with the mounting hole; A driving unit, wherein the driving unit is mounted on the fixing seat, an output end of the driving unit is connected to the sliding sleeve, and the driving unit drives the sliding sleeve to move toward or away from the mounting hole; A calibration shaft, two ends of which are detachably connected to the mounting hole and the sliding sleeve respectively; The winding needle calibration device also includes the measuring tool, which is a depth micrometer, which is detachably mounted at the measuring position, and a measuring rod of the depth micrometer is arranged vertically to the axis of the mounting hole; The number of the measurement position groups is two, and the two measurement position groups are respectively located on two opposite sides of the axis of the mounting hole; The calibration shaft is provided with more than two calibration disks, the more than two calibration disks are distributed along the axial direction of the calibration shaft, and the more than two calibration disks correspond to the more than two measuring positions one by one; A shaft sleeve is arranged on the mounting hole, and a linear bearing, a copper sleeve or a boundary lubrication bearing is arranged between the sliding sleeve and the fixing seat; The driving unit comprises a second bracket and a screw, the second bracket is fixedly mounted on the fixing seat, the screw is threadedly connected to the second bracket, the screw is coaxially arranged with the sliding sleeve, and the screw is connected to the sliding sleeve; or The driving unit includes a third bracket, a motor and a ball screw. The third bracket is fixedly mounted on the fixing seat. The motor is mounted on the third bracket. The screw end of the ball screw is connected to the motor shaft of the motor. The nut of the ball screw is connected to the sleeve.

2. The needle winding calibration device according to claim 1, characterized in that: The locking unit comprises a stopper and a locking assembly. The stopper is detachably engaged with a first end of a base of the depth micrometer, and the locking assembly can fix a second end of the base on the fixing seat.

3. The needle winding calibration device according to claim 2, characterized in that: The locking assembly includes a first bracket and a locking rod. The first bracket is fixedly mounted on a fixing seat. The locking rod is slidably connected to the first bracket along its axial direction. The locking rod is parallel to the measuring rod. The locking rod is detachably abutted against the second end of the base.

4. The winding needle calibration device according to any one of claims 1 to 3, characterized in that: The depth micrometer comprises a plurality of measuring rods, which are respectively detachably connected to the measuring mechanism of the depth micrometer, and the lengths of the plurality of measuring rods are different.

5. The winding needle calibration device according to claim 1, characterized in that: A first bearing is arranged between the shaft sleeve and the fixing seat; A second bearing is provided between the linear bearing and the fixed seat, a second bearing is provided between the copper sleeve and the fixed seat, or a second bearing is provided between the boundary lubrication bearing and the fixed seat; A one-way bearing is arranged between the sliding sleeve and the output end of the driving unit.

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