A dispensing positioning device for a radioactive source

Abstract

The utility model provides a kind of dispensing positioning device of radioactive source, including rotary disc, dispensing work station, jacket and clamping assembly, rotary disc is set on the processing production line of radioactive source, multiple jackets are evenly distributed in the circumferential direction on rotary disc upper end, one clamping assembly is set below each jacket, clamping assembly is installed on production line, clamping assembly is used to rotate jacket and radioactive source core, jacket is used to clamp radioactive source core, external mechanical hand gripper can be transferred to the jacket in the preset position of radioactive source core, one side of rotary disc is provided with dispensing work station, and dispensing work station is used to dispense on the upper end of radioactive source core.The dispensing positioning device of radioactive source of the utility model can ensure that adhesive solution is evenly and stably coated on the specified position of source core, avoid the position deviation and uneven glue discharge of manual dispensing, ensure dispensing precision, provide reliable guarantee for the connection or sealing of subsequent source core and other components.

Description

Technical Field

[0001] This utility model belongs to the field of adhesive coating for radioactive sources, and in particular relates to an adhesive dispensing and positioning device for radioactive sources. Background Technology

[0002] A radioactive source is a substance or device that continuously emits ionizing radiation. Its core is a material containing radioactive nuclides. This radiation has penetrating power and energy, and can be applied in various fields such as industry, medicine, and scientific research. For example, in industry, it is used for non-destructive testing of metal weld defects; in medicine, it is used for tumor radiotherapy; and in scientific research, it is used for research on material irradiation modification. In the field of radioactive source processing, the core encapsulation process requires extremely high precision and uniformity in the application of the adhesive layer, which directly affects the sealing performance and long-term safety of the radioactive source. Traditional radioactive source dispensing operations mostly rely on manual positioning. Due to the radiation risks of radioactive sources, manual operation requires heavy protective equipment, which not only reduces operational flexibility and causes large positioning errors, but also poses a risk of radiation exposure to personnel. Problems such as uneven adhesive application and adhesive layer misalignment are prone to occur, which in turn lead to the risk of leakage after encapsulation. Utility Model Content

[0003] In view of this, the present invention aims to propose a dispensing and positioning device for a radioactive source, so as to solve the problem that inaccurate positioning occurs when manually applying adhesive to a radioactive source, which affects downstream processes and causes low production efficiency.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A dispensing and positioning device for a radioactive source includes a rotating disk, a dispensing station, a clamping sleeve, and a clamping assembly. The rotating disk is installed on the production line for processing radioactive sources. Multiple clamping sleeves are evenly distributed circumferentially on the upper end of the rotating disk. A clamping assembly is installed below each clamping sleeve. The clamping assembly is installed on the production line and is used to rotate the clamping sleeve and the radioactive source core. The clamping sleeve is used to clamp the radioactive source core. An external robotic gripper can transfer the radioactive source core into the clamping sleeve at a preset position. A dispensing station is installed on one side of the rotating disk and is used to apply adhesive to the upper part of the radioactive source core.

[0005] Furthermore, the dispensing station includes a mounting base, a slider, and a first servo motor. The mounting base is fixedly installed on the processing line of the radiation source. The slider is slidably connected to one side of the mounting base. The first servo motor is fixedly installed at the upper end of the mounting base. A lead screw is rotatably connected inside the mounting base. One end of the lead screw is fixedly connected to the movable end of the first servo motor. The outer thread of the lead screw is connected to the slider.

[0006] Furthermore, the dispensing station also includes a needle holder, a first cylinder, a needle tube, and a second cylinder. The second cylinder is fixedly installed on one side of the slider. The movable end of the second cylinder is fixedly connected to the needle holder. The first cylinder is fixedly installed on one end of the needle holder. The needle tube is installed on the other end of the needle holder. The needle tube contains glue. The movable end of the first cylinder is connected to the piston of the needle tube.

[0007] Furthermore, the rotating disk includes a fixed disk, a second servo motor, an indexing disk, and a cam divider. The fixed disk is fixedly installed on the production line for processing the radiation source. The indexing disk is rotatably sleeved in the middle of the fixed disk. The indexing disk is coaxial with the fixed disk. Multiple mounting slots are provided along the circumferential direction on the indexing disk. A clip is installed in each mounting slot. The cam divider is installed at the lower end of the fixed disk. The output shaft of the cam divider is fixedly connected to the indexing disk. The second servo motor is fixedly installed on one side of the cam divider. The outer periphery of the output shaft of the second servo motor and the outer periphery of the input shaft of the cam divider are connected by a synchronous belt to form a transmission structure.

[0008] Furthermore, an induction disk is fixedly sleeved around the input shaft of the cam divider, and the notch of the induction disk is used to sense the execution end of the zero-position switch. The zero-position switch is fixedly installed on the outer side wall of the cam divider.

[0009] Furthermore, the clamp includes a clamp body, a seated bearing, a pull rod, a pull block, a sleeve 46, and a second gear. The sleeve is provided around the clamp body and is rotatably mounted in the mounting groove via the seated bearing. The clamp body can move axially relative to the sleeve, and the upper outer periphery of the clamp body is snapped into the upper inner ring of the sleeve. One end of the pull rod is fixedly connected to the lower end of the clamp body, and the other end of the pull rod is rotatably connected to the pull block. The pull block can be snapped into the clamping assembly. The second gear is fixedly sleeved around the pull rod and can mesh with the clamping assembly.

[0010] Furthermore, the clamping assembly includes a pull-down base, a cylinder, and a second servo motor. The outer periphery of the second gear can mesh with the output gear of the second servo motor. The second servo motor is fixedly installed on the production line. A cylinder is fixedly installed on one side of the second servo motor. The movable end of the cylinder is connected to the closed end of the pull-down base, and the other end of the pull-down base is used to clamp the outer periphery of the pull block.

[0011] Compared with the prior art, the dispensing and positioning device for a radiation source described in this utility model has the following advantages: (1) The dispensing and positioning device for a radioactive source described in this utility model is equipped with a dispensing station, which can ensure that the adhesive is uniformly and stably coated on the designated position of the source core, avoid the position deviation and uneven dispensing of the manual dispensing, ensure the dispensing accuracy, and provide a reliable guarantee for the subsequent connection or sealing of the source core with other components.

[0012] The present invention discloses a dispensing and positioning device for a radioactive source, which includes an origin calibration component to ensure that the rotating disk returns to a fixed origin after each rotation, so that the storage tank and density source tank are always within the grasping range of the six-axis robotic arm, avoiding robotic arm grasping failure or source core collision due to positioning deviation of the rotating disk.

[0013] The present invention discloses a dispensing and positioning device for a radioactive source, which is equipped with a clamping fixture that can clamp the radioactive source core and rotate the core to cooperate with the dispensing station to apply adhesive to the periphery of the radioactive source core, thereby improving work efficiency and the automation level of the overall device. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a dispensing and positioning device for a radioactive source according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the dispensing station described in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the rotating disk described in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the lower end of the rotating disk according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the clamping assembly described in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the jacket described in an embodiment of the present utility model.

[0015] Explanation of reference numerals in the attached figures: 1-Rotating disk; 11-Fixed disk; 12-Second servo motor; 13-Indexing disk; 131-Mounting slot; 14-Cam divider; 141-Induction disk; 142-Zero switch; 2-Dispensing station; 21-Mounting base; 22-Slider; 23-First servo motor; 24-Needle holder; 25-First cylinder; 26-Needle; 27-Second cylinder; 3-Robot gripper; 4-Clamping sleeve; 41-Clamping sleeve body; 42-Bearing with seat; 43-Pull rod; 44-Pull block; 45-Gear; 46-Sleeve; 5-Clamping assembly; 51-Pull-down base; 52-Third cylinder; 53-Third servo motor. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, the assembly includes a rotating disk 1, a dispensing station 2, a clamping sleeve 4, and a clamping assembly 5. The rotating disk 1 is installed on the production line for processing the radiation source. Multiple clamping sleeves 4 are evenly distributed circumferentially on the upper end of the rotating disk 1. A clamping assembly 5 is installed below each clamping sleeve 4. The clamping assembly 5 is installed on the production line and is used to rotate the clamping sleeve 4 and the radiation source core. The clamping sleeve 4 is used to clamp the radiation source core. An external robotic gripper 3 can transfer the radiation source core into the clamping sleeve 4 at a preset position. The dispensing station 2 is installed on one side of the rotating disk 1 and is used to apply adhesive to the upper part of the radiation source core. The robotic gripper 3 is existing technology and its model number is RM01.

[0021] like Figure 2As shown, the dispensing station 2 includes a mounting base 21, a slider 22, and a first servo motor 23. The mounting base 21 is fixedly installed on the processing line of the radiation source. The slider 22 is slidably connected to one side of the mounting base 21. The first servo motor 23 is fixedly installed at the upper end of the mounting base 21. A lead screw is rotatably connected inside the mounting base 21. One end of the lead screw is fixedly connected to the movable end of the first servo motor 23. The outer thread of the lead screw is connected to the slider 22. The first servo motor 23 is existing technology, and the model of the first servo motor 23 is 01113977-wxstep. The dispensing station 2 also includes a needle holder 24, a first cylinder 25, a needle tube 26, and a second cylinder 27. The second cylinder 27 is fixedly installed on one side of the slider 22. The movable end of the second cylinder 27 is fixedly connected to the needle holder 24. The first cylinder 25 is fixedly installed at one end of the needle holder 24. The needle tube 26 is installed at the other end of the needle holder 24. The needle tube 26 contains glue. The movable end of the first cylinder 25 is connected to the piston of the needle tube 26. When dispensing station 2 is working, it first waits for the rotating disk 1 to drive the clamping body 41 of the radiation source core to be transferred to the corresponding dispensing position. The indexing disk 13 stops rotating. Then, the first servo motor 23 drives the lead screw in the mounting base 21 to rotate, causing the slider 22 to move vertically. When the slider 22 moves to align the needle tube 26 with the preset dispensing position of the source core, the second cylinder 27 pushes the needle tube seat 22 to adjust the horizontal position of the needle tube 26, ensuring that the needle tube nozzle accurately fits the dispensing point of the source core. Then, the movable end of the first cylinder 25 pushes the needle tube 26... The piston evenly squeezes the adhesive from the syringe to the designated position of the source core. After dispensing, the first cylinder 25 resets, the first servo motor 23 drives the slider 22 to lift and reset the syringe 26, the second cylinder 27 drives the syringe seat 22 back to its original position, and the rotating disk 1 transfers the source core to the next workstation. The dispensing workstation 2 is set up to ensure that the adhesive is evenly and stably coated on the designated position of the source core, avoiding the position deviation and uneven dispensing problems of manual dispensing, ensuring dispensing accuracy, and providing a reliable guarantee for the subsequent connection or sealing of the source core with other components.

[0022] like Figure 3As shown, the rotating disk 1 includes a fixed disk 11, a second servo motor 12, an indexing disk 13, and a cam divider 14. The fixed disk 11 is fixedly installed on the production line for processing radiation sources. The indexing disk 13 is rotatably sleeved in the middle of the fixed disk 11. The indexing disk 13 is coaxially arranged with the fixed disk 11. The indexing disk 13 has multiple mounting slots 131 along its circumference. A sleeve 4 is installed in each mounting slot 131. The cam divider 14 is installed at the lower end of the fixed disk 11. The output shaft of the cam divider 14 is fixedly connected to the indexing disk 13. The second servo motor 12 is fixedly installed on one side of the cam divider 14. The outer periphery of the output shaft of the second servo motor 12 and the outer periphery of the input shaft of the cam divider 14 are connected by a synchronous belt to form a transmission structure. The second servo motor 12 is existing technology, and the model of the second servo motor 12 is 01113977-wxstep. The cam divider 14 is existing technology, and the model of the cam divider 14 is 25DF. like Figure 4 As shown, the input shaft of the cam divider 14 is fixedly sleeved with an induction disk 141. The notch of the induction disk 141 is used to sense the execution end of the zero-position switch 142. The zero-position switch 142 is fixedly installed on the outer wall of the cam divider 14. The zero-position switch 142 is existing technology. The model of the zero-position switch 142 is EE-SX671. The zero-position switch 142 can cooperate with the induction disk 141 to achieve zero-position calibration, ensure that the starting position of each rotation is consistent, ensure the stability of batch operation, and improve the maintenance efficiency of the radioactive source core.

[0023] The second servo motor 12 drives the input shaft of the cam divider 14 to rotate via a synchronous belt. The notch on the induction disk 141 on the input shaft triggers the zero-position switch 142. After receiving the signal, the control system stops the motor, completing the zero-position calibration of the indexing disk 13. The six-axis robotic arm 2 places the source core into the clamp body 41 on the indexing disk 13. Then, the second servo motor 12 drives the cam divider 14, causing the indexing disk 13 to rotate step by step at a fixed angle, sending the source core to each workstation in sequence. During operation at each workstation, the fourth servo motor 115 drives the clamp 111 to rotate the source core via the gear 112. The robotic gripper 3 picks up the source core and transfers it to the next workstation. The rotating disk 1 resets and waits for the next round of operation. The rotating disk 1, in cooperation with the cam divider 14 and the second servo motor 12, enables the high-precision step-by-step rotation of the indexing disk 13, ensuring accurate alignment of the source core with each workstation and improving the assembly accuracy of multiple processes.

[0024] like Figure 4 As shown, the input shaft of the cam divider 14 is fixedly sleeved with the induction disk 141. The notch of the induction disk 141 is used to sense the execution end of the zero-position switch 142. The zero-position switch 142 is fixedly installed on the outer wall of the cam divider 14.

[0025] like Figure 5 and Figure 6As shown, the clamping sleeve 4 includes a clamping body 41, a seated bearing 42, a pull rod 43, a pull block 44, a sleeve 46, and a second gear 45. The sleeve 46 is disposed around the clamping body 41 and is rotatably mounted in the mounting groove 131 via the seated bearing 42. The clamping body 41 can move axially relative to the sleeve 46, and the upper outer periphery of the clamping body 41 is engaged with the upper inner ring of the sleeve 46. One end of the pull rod 43 is fixedly connected to the lower end of the clamping body 41, and the other end of the pull rod 43 is rotatably connected to the pull block 44. The pull block 44 can be engaged within the clamping assembly 5. The second gear 45 is fixedly sleeved around the pull rod 43 and can mesh with the clamping assembly 5. The clamping assembly 5 includes a lower... The assembly includes a pull base 51, a cylinder 22, and a third servo motor 53. The outer periphery of the second gear 45 can mesh with the output gear of the third servo motor 53. The third servo motor 53 is fixedly installed on the production line. The cylinder 22 is fixedly installed on one side of the third servo motor 53. The movable end of the cylinder 22 is connected to the closed end of the pull base 51. The other end of the pull base 51 is used to clamp the outer periphery of the pull block 44. The clamping body 41 is existing technology, and the model of the clamping body 41 is Hoffman ER13835010900. The cylinder 22 is existing technology, and the model of the cylinder 22 is MD25x20-S20. The third servo motor 53 is existing technology, and the model of the third servo motor 53 is 57CM13. The controller starts the cylinder 22, whose movable end pulls the pull-down seat 51, causing the pull-down seat 51 to clamp the pull block 44 at the end of the pull rod 43. The pull block 44 limits the pull rod 43, keeping the jacket body 41 stable. The cylinder 22 pulls the pull rod 42, causing the jacket body 41 to retract within the sleeve 46 and clamp the radiation source core. The third servo motor 53 starts, and its output gear meshes with the second gear 45 fixed on the periphery of the pull rod 43 of the jacket 2, driving the pull rod 43 and the jacket body 41 to rotate synchronously. This causes the radiation source core inside the jacket body 41 to rotate accordingly, working with the steel brush 14 of the cleaning component 1 to complete the cleaning of the outer surface. After cleaning is completed, the third servo motor 53 stops running, and the movable end of the cylinder 22 pulls back, causing the pull-down seat 51 to release the pull block 44, so that the turntable 3 can transfer it to the next process. The jacket body 41 and the internal source core rotate synchronously, and the dispensing station 2 applies glue to the periphery of the radiation source core. The jacket body 41 is set up to clamp the radiation source core and rotate the source core to cooperate with the dispensing station 2 to apply glue to the periphery of the radiation source core, thereby improving work efficiency and the automation level of the overall device.

[0026] The working process of a dispensing and positioning device for a radiation source: After the device is started, the second servo motor 12 drives the input shaft of the cam divider 14 to rotate via the synchronous belt. The notch of the induction disk 141 around the input shaft triggers the zero-position switch 142, completing the zero-position calibration of the indexing disk 13 of the rotating disk 1. The robotic gripper 3 transfers the radiation source core into the clamping body 41 on the indexing disk 13. The second servo motor 12 starts, driving the cam divider 14 to rotate the indexing disk 13 at a fixed angle, transferring the clamping body 41 holding the radiation source core to the position below the dispensing station 2. The movable end of the third cylinder 52 pulls the pull-down seat 51, which clamps the pull block 44 at the end of the pull rod 43. The pull block 44 limits the pull rod 43, allowing the clamping body 41 to move. To maintain stability, the inner ring of the jacket body 41 contracts and clamps the radioactive source core within the sleeve 46. The indexing plate 13 stops rotating. The first servo motor 23 of the dispensing station 2 drives the lead screw inside the mounting base 21 to rotate, causing the slider 22 to move vertically, aligning the needle tube 26 with the preset dispensing position on the radioactive source core. Subsequently, the second cylinder 27 pushes the needle tube seat 24 to adjust the horizontal position of the needle tube 26, ensuring that the nozzle accurately adheres to the dispensing area. The third servo motor 125 drives the gear 122 to rotate, causing the jacket body 41 and the internally clamped radioactive source core to rotate. The movable end of the first cylinder 25 pushes the piston of the needle tube 26 to extrude the adhesive. After dispensing, adhesive is applied to the upper end while the radioactive source core is rotating. After adhesive application, the first cylinder 25, the first servo motor 23, and the second cylinder 27 sequentially drive the corresponding components to reset. The rotating plate 1 continues to transport the radioactive source core to the next station. After all processes are completed, a robotic gripper 3 transfers the radioactive source core out of the device, and the rotating plate 1 resets to await the next round of operation.

[0027] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dispensing and positioning device for a radioactive source, characterized in that: The device includes a rotating disk (1), a dispensing station (2), a clamp (4), and a clamping assembly (5). The rotating disk (1) is installed on the production line for processing the radiation source. Multiple clamps (4) are evenly distributed around the upper end of the rotating disk (1). A clamping assembly (5) is installed below each clamp (4). The clamping assembly (5) is installed on the production line. The clamping assembly (5) is used to rotate the clamp (4) and the radiation source core. The clamp (4) is used to clamp the radiation source core. An external robotic gripper (3) can transfer the radiation source core into the clamp (4) at a preset position. A dispensing station (2) is installed on one side of the rotating disk (1). The dispensing station (2) is used to apply adhesive to the upper part of the radiation source core.

2. The dispensing and positioning device for a radioactive source according to claim 1, characterized in that: The dispensing station (2) includes a mounting base (21), a slider (22) and a first servo motor (23). The mounting base (21) is fixedly installed on the processing line of the radiation source. The slider (22) is slidably connected to one side of the mounting base (21). The first servo motor (23) is fixedly installed at the upper end of the mounting base (21). A lead screw is rotatably connected inside the mounting base (21). One end of the lead screw is fixedly connected to the movable end of the first servo motor (23). The outer thread of the lead screw is connected to the slider (22).

3. The dispensing and positioning device for a radioactive source according to claim 1, characterized in that: The dispensing station (2) also includes a needle holder (24), a first cylinder (25), a needle tube (26), and a second cylinder (27). The second cylinder (27) is fixedly installed on one side of the slider (22). The movable end of the second cylinder (27) is fixedly connected to the needle holder (24). The first cylinder (25) is fixedly installed on one end of the needle holder (24). The needle tube (26) is installed on the other end of the needle holder (24). The needle tube (26) is filled with glue. The movable end of the first cylinder (25) is connected to the piston of the needle tube (26).

4. The adhesive dispensing and positioning device for a radioactive source according to claim 1, characterized in that: The rotating disk (1) includes a fixed disk (11), a second servo motor (12), an indexing disk (13), and a cam divider (14). The fixed disk (11) is fixedly installed on the production line of the radiation source. The indexing disk (13) is rotated and sleeved in the middle of the fixed disk (11). The indexing disk (13) is coaxially arranged with the fixed disk (11). Multiple mounting slots (131) are provided along the circumferential direction on the indexing disk (13). A sleeve (4) is provided in each mounting slot (131). The cam divider (14) is installed at the lower end of the fixed disk (11). The output shaft of the cam divider (14) is fixedly connected to the indexing disk (13). The second servo motor (12) is fixedly installed on one side of the cam divider (14). The outer periphery of the output shaft of the second servo motor (12) and the outer periphery of the input shaft of the cam divider (14) are connected by a synchronous belt to form a transmission structure.

5. The dispensing and positioning device for a radioactive source according to claim 3, characterized in that: The input shaft of the cam divider (14) is fixedly sleeved with the induction disk (141). The notch of the induction disk (141) is used to sense the execution end of the zero-position switch (142). The zero-position switch (142) is fixedly installed on the outer wall of the cam divider (14).

6. The dispensing and positioning device for a radioactive source according to claim 1, characterized in that: The clamp (4) includes a clamp body (41), a seated bearing (42), a pull rod (43), a pull block (44), a sleeve (46), and a second gear (45). The sleeve (46) is provided around the clamp body (41). The sleeve (46) is rotatably disposed in the mounting groove (131) through the seated bearing (42). The clamp body (41) can move axially relative to the sleeve (46). The upper outer periphery of the clamp body (41) is snapped to the upper inner ring of the sleeve (46). The lower end of the clamp body (41) is fixedly connected to one end of the pull rod (43). The other end of the pull rod (43) is rotatably connected to the pull block (44). The pull block (44) can be snapped into the clamping assembly (5). The outer periphery of the pull rod (43) is fixedly sleeved with the second gear (45). The second gear (45) can mesh with the clamping assembly (5).

7. The dispensing and positioning device for a radioactive source according to claim 6, characterized in that: The clamping assembly (5) includes a pull-down seat (51), a third cylinder (52) and a third servo motor (53). The outer periphery of the second gear (45) can mesh with the output gear of the third servo motor (53). The third servo motor (53) is fixedly installed on the production line. The third cylinder (52) is fixedly installed on one side of the third servo motor (53). The movable end of the third cylinder (52) is connected to the closed end of the pull-down seat (51). The other end of the pull-down seat (51) is used to clamp the outer periphery of the pull block (44).

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