Adhesive sticker cutting equipment

Abstract

The invention discloses adhesive sticker cutting equipment, and relates to the field of adhesive sticker cutting. A conveying belt is installed on the inner sides of the two side plates, and a servo motor used for driving the conveying belt to operate is installed outside the side plates; the cold sense can be transmitted to the cutting tool through the temperature control assembly, the problem that the cutting tool is heated to expand due to the fact that the cutting tool is in a high-temperature state after long-time friction cutting with the non-setting adhesive is effectively solved, deviation between the actual cutting size and the design size is further avoided, and then the cutting precision is not affected; the refrigeration sheet is driven to work to enable the cooling liquid in the cavity to be frozen and in a solidification state, on one hand, the hardness of the cutting tool can be increased, the cutting tool is prevented from being in a hollow state to cause edge curling, the ice body can be further utilized to slowly transfer the cold feeling, and long-time refrigeration of the cutting tool is achieved; and the cold degree of the cutting tool can be utilized to ensure that glue is not easy to adhere to the cutting tool when the adhesive sticker is cut by the cavity.

Description

Technical Field

[0001] The present invention relates to the field of self-adhesive cutting, in particular to a self-adhesive cutting device. Background Art

[0002] Self-adhesive label materials, also known as self-adhesive label materials, are a composite material with paper, film or special materials as the outer surface, adhesive coated on the back, and silicone-coated protective paper as the base paper. Cutting equipment is required during its processing.

[0003] Existing cutting tools are prone to glue problems during the self-adhesive cutting process, which not only affects cutting accuracy and subsequent processing, but also triggers a series of chain reactions. From the perspective of cutting quality, the glue attached to the tool surface will reduce the fit of the blade, and burrs and misalignment are likely to occur during cutting, resulting in a lower product qualification rate. The impact of glue problems on production efficiency is also very significant. As glue continues to accumulate, operators need to frequently stop the machine to clean the cutting tools. Each cleaning time can take as little as a few minutes or as long as more than ten minutes. In mass production, this will significantly extend the total working hours. Moreover, if the cleaning process is not done properly, it may damage the blade and shorten the tool life.

[0004] Therefore design a kind of self-adhesive cutting equipment. Summary of the Invention

[0005] The present invention aims to solve the deficiencies in the prior art and provides a self-adhesive cutting device.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions: In order to achieve the above object, the present invention adopts the following technical solutions: A self-adhesive cutting device comprises: two side panels, conveyor belts are installed on the inner sides of the two side panels, and a servo motor for driving the conveyor belts is installed on the outside of the side panels; it also comprises: a bracket installed on the top of the two side panels, a telescopic cylinder is installed on the top of the bracket, a power output shaft of the telescopic cylinder is fixedly connected to a cutting tool, a temperature control component is installed on the top of the bracket, and the temperature control component is used to reduce the temperature of the cutting tool; and a pressing component installed below the bracket for positioning the self-adhesive, an intercepting component is installed on one side of the pressing component; and a wiping component installed on the outside of the bracket for cleaning residual impurities on the outside of the cutting tool and a covering component for protecting the cutting tool.

[0007] Preferably, the temperature control component includes a water tank, which is installed on the top of the bracket, and a refrigerator is installed inside the water tank. One end of a connecting pipe is fixedly connected to the inside of the water tank, and the other end of the connecting pipe is communicated with the inside of the cutting tool. A cavity is opened inside the cutting tool, and a plurality of cooling fins are symmetrically installed on the inner wall of the cavity. A water pump is installed on the outer edge of one end of the connecting pipe close to the water tank, and the connecting pipe is slidably connected to the inner wall of the bracket. The interior of the water tank is filled with coolant.

[0008] Preferably, the compression assembly includes a downward plate, which is fixedly connected to the output shaft of the telescopic cylinder. The bottom of the downward plate is symmetrically fixedly connected to one end of four downward pressure springs, and the bottom ends of the four downward pressure springs are fixedly connected to two pressure plates.

[0009] Preferably, four limiting shafts are symmetrically installed on the top of the two pressing plates, and the four limiting shafts are all slidably connected to the inner wall of the downward moving plate.

[0010] Preferably, the intercepting assembly includes a slider and a material baffle plate, the slider is fixedly connected to the outer wall of the lower plate, the inner wall of the material baffle plate is provided with a straight groove, and the inner wall of the straight groove is installed with a vertical rod, the bottom of the straight groove is fixedly connected to one end of a return spring, the other end of the return spring is fixedly connected to the slider, and the slider is slidably connected to the outside of the vertical rod and slidably connected to the inner wall of the straight groove.

[0011] Preferably, the wiping assembly includes a stepper motor, which is installed on the outside of the bracket. The power output shaft of the stepper motor is fixedly connected to a screw rod, the outer edge of the screw rod is threadedly connected to a moving block, the outer side of the moving block is fixedly connected to a V-shaped block, and a wiping plate is installed on the inner wall of the V-shaped block, and the inner side of the wiping plate fits with the outer wall of the cutting tool.

[0012] Preferably, the covering assembly includes a positioning frame, which is fixedly connected to the inner side of the bracket, one side of the positioning frame is fixedly connected to one side of the protective curtain, and the other side of the protective curtain is fixedly connected to the side of the V-shaped block close to the positioning frame, and a linkage part is installed on the outer edge of the screw rod.

[0013] Preferably, the linkage part includes a driving wheel, which is fixed to the outer edge of the screw rod, and a driven wheel is rotatably installed on the outer side of the bracket. The outer edges of the driving wheel and the driven wheel are sleeved with a transmission belt. A through hole is opened on the inner wall of the bracket, and a fan is fixedly connected to the side of the driven wheel close to the through hole. The fan is rotatably connected to the inner wall of the through hole, and a guide tube is installed on the inner side of the bracket corresponding to the position of the fan and the through hole.

[0014] Preferably, a fixing plate is fixed to the outer side of the bracket, and the driven wheel is rotatably connected to the inner side of the fixing plate.

[0015] Preferably, a limit rod is fixed on the inner wall of the bracket, the limit rod is slidably connected to the moving block, a bearing is installed on the inner wall of the bracket, and the end of the screw away from the stepping motor is rotatably connected to the inner wall of the bearing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can transmit the cooling sensation to the cutting tool through the temperature control component, effectively avoiding the problem that the cutting tool is in a high temperature state after being rubbed against the self-adhesive for a long time and causing the cutting tool to expand due to heat, further ensuring that the actual cutting size does not deviate from the designed size, thereby not affecting the cutting accuracy. The refrigeration plate is driven to operate to allow the coolant inside the cavity to freeze and be in a solidified state. On the one hand, it can increase the hardness of the cutting tool and avoid the cutting tool being in a hollow state and causing the blade to curl. Further, the ice body can be used to slowly transmit the cooling sensation to achieve long-term cooling of the cutting tool, and the coldness of the cutting tool can be used to ensure that the glue is not easily adhered to the cutting tool when the cutting tool cuts the self-adhesive.

[0017] The present invention can use the telescopic cylinder to drive the cutting tool to move downward through the compression component, and simultaneously drive the lower plate to move downward during cutting (the conveyor belt is in a stopped state at this time), so that the pressure plate can first contact the self-adhesive sticker to be cut, and further squeeze the downward pressure spring to transmit pressure to the pressure plate, to ensure that the self-adhesive sticker is stably set above the conveyor belt, and at the same time, it can ensure that the position will not be easily shifted during cutting, and the interception component is used to make the lower plate drive the bottom of the material blocking plate to contact the top of the conveyor belt first, and further the material blocking plate can be used to abut the side of the self-adhesive sticker to be cut, to ensure that it can be set at the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a schematic diagram showing the structure of the flat fixing plate of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the cutting tool of the present invention; Figure 5 It is a schematic diagram of the compression assembly structure of the present invention; Figure 6Schematic diagram of the cross-sectional structure of the baffle plate of the present invention; Figure 7 For the present invention Figure 6 A in the middle is an enlarged structural diagram; Figure 8 This is a schematic diagram of the cross section of the stent and the expanded structure of the flow guide tube of the present invention; Figure 9 It is a schematic structural diagram of the covering assembly and linkage part of the present invention.

[0020] Explanation of the figure numbers: 1. Side panel; 2. Conveyor belt; 3. Servo motor; 4. Bracket; 5. Telescopic cylinder; 6. Cutting tool; 7. Cavity; 8. Refrigeration plate; 9. Connecting pipe; 10. Water tank; 11. Refrigerator; 12. Water pump; 13. Lowering plate; 14. Downward pressure spring; 15. Pressing plate; 16. Limiting shaft; 17. Slider; 18. Baffle plate; 19. Return spring; 20. Vertical pole; 21. Stepping motor; 22. Screw; 23. Moving block; 24. V-shaped block; 25. Wiping plate; 26. Protective curtain; 27. Positioning frame; 28. Driving wheel; 29. ​​Driven wheel; 30. Transmission belt; 31. Fan; 32. Through hole; 33. Guide pipe; 34. Fixed plate; 35. Limiting rod; 36. Bearing. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings.

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limiting the present invention.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0025] See also Figure 1-9 , a self-adhesive cutting device, comprising: two side panels 1, a conveyor belt 2 is installed on the inner side of the two side panels 1, a servo motor 3 for driving the conveyor belt 2 is installed on the outside of the side panels 1; it also includes: a bracket 4 installed on the top of the two side panels 1, a telescopic cylinder 5 is installed on the top of the bracket 4, a power output shaft of the telescopic cylinder 5 is fixedly connected to a cutting tool 6, a temperature control component is installed on the top of the bracket 4, the temperature control component is used to reduce the temperature of the cutting tool 6; a pressing component is installed under the bracket 4 for positioning the self-adhesive, and an intercepting component is installed on one side of the pressing component; and a wiping component installed on the outside of the bracket 4 for cleaning residual impurities on the outside of the cutting tool 6 and a covering component for protecting the cutting tool 6; In this solution, driving the servo motor 3 to drive the conveyor belt 2 to move the self-adhesive label that needs to be cut to the designated position below the bracket 4 for cutting, and driving the telescopic cylinder 5 to drive the cutting tool 6 to move vertically downward can be used to cut the self-adhesive label above the conveyor belt 2.

[0026] For further information, see Figure 3 and Figure 4 The temperature control component includes a water tank 10, which is installed on the top of the bracket 4. A refrigerator 11 is installed inside the water tank 10. One end of a connecting pipe 9 is fixedly connected to the inside of the water tank 10. The other end of the connecting pipe 9 is connected to the inside of the cutting tool 6. A cavity 7 is opened inside the cutting tool 6. A plurality of cooling fins 8 are symmetrically installed on the inner wall of the cavity 7. A water pump 12 is installed on the outer edge of one end of the connecting pipe 9 close to the water tank 10. The connecting pipe 9 is slidably connected to the inner wall of the bracket 4. The inside of the water tank 10 is filled with coolant. In this solution, by driving the water pump 12 to operate, the coolant in the water tank 10 that has been cooled by the refrigerator 11 can be discharged to the inside of the cavity 7 through the connecting pipe 9, and the cold feeling can be further transmitted to the cutting tool 6, effectively avoiding the cutting tool 6 from being in a high temperature state after long-term friction with the self-adhesive cutting, which will cause the cutting tool 6 to expand due to heat, and further ensure that the actual cutting size and the design size will not deviate, and thus will not affect the cutting accuracy. At the same time, the refrigeration plate 8 can be driven to operate to make the coolant in the cavity 7 freeze and be in a solidified state. On the one hand, it can increase the hardness of the cutting tool 6 and avoid the cutting tool 6 being in a hollow state and causing the blade to curl. Further, the ice body can be used to slowly transmit the cold feeling to achieve long-term cooling of the cutting tool 6, and the coldness of the cutting tool 6 can be used to ensure that the glue will not stick to the cutting tool 6 when the cutting tool 6 cuts the self-adhesive. Example

[0027] For further information, see Figure 5 and Figure 6The compression assembly includes a downward plate 13, which is fixedly connected to the output shaft of the telescopic cylinder 5. The bottom of the downward plate 13 is symmetrically fixedly connected to one end of four downward pressure springs 14, and the bottom ends of the four downward pressure springs 14 are fixedly connected to two pressure plates 15; Among them: In order to prevent the downward pressure spring 14 from bending easily when the pressure plate 15 presses the adhesive label, and only receives the squeezing force of the lower plate 13, four limiting shafts 16 are symmetrically installed on the top of the two pressure plates 15, and the four limiting shafts 16 are all slidably connected to the inner wall of the lower plate 13; In this solution, the telescopic cylinder 5 is used to drive the cutting tool 6 to move downward, and the lower plate 13 is simultaneously driven downward during cutting, so that the pressure plate 15 can first contact the adhesive to be cut, and further squeeze the downward pressure spring 14 to transfer pressure to the pressure plate 15, ensuring that the adhesive is stably set above the conveyor belt 2, and at the same time ensuring that it will not easily shift its position during cutting.

[0028] For further information, see Figure 5-Figure 7 The interception assembly includes a slider 17 and a baffle plate 18. The slider 17 is fixedly connected to the outer wall of the lower plate 13. A straight groove is opened on the inner wall of the baffle plate 18, and a vertical rod 20 is installed on the inner wall of the straight groove. One end of a return spring 19 is fixedly connected to the bottom of the straight groove. The other end of the return spring 19 is fixedly connected to the slider 17. The slider 17 is slidably connected to the outside of the vertical rod 20 and the inner wall of the straight groove. In this solution, the bottom of the baffle plate 18 is driven by the lower plate 13 to contact the top of the conveyor belt 2 first, and the baffle plate 18 can be further used to abut the side of the self-adhesive label that needs to be cut to ensure that it can be set at the specified position, and the continuous downward squeezing of the lower plate 13 will push the slider 17 on the inner wall of the straight groove to slide up and down, and then squeeze the return spring 19 into a contracted state, so that the pressure will not be directly transmitted to the baffle plate 18, so that the lower plate 13 will not interfere with the baffle plate 18 when it continues to drive the lower plate 13 and the cutting tool 6 to move downward to position and cut the self-adhesive label in turn. Example

[0029] For further information, see Figure 9 The wiping assembly includes a stepper motor 21, which is mounted on the outside of the bracket 4. The power output shaft of the stepper motor 21 is fixedly connected to a screw rod 22. The outer edge of the screw rod 22 is threadedly connected to a moving block 23. The outer side of the moving block 23 is fixedly connected to a V-shaped block 24. A wiping plate 25 is installed on the inner wall of the V-shaped block 24. The inner side of the wiping plate 25 fits the outer wall of the cutting tool 6. In this solution, the stepper motor 21 is driven to drive the screw rod 22 to rotate, which in turn drives the moving block 23 to move on the outer edge of the screw rod 22, and further synchronously drives the V-shaped block 24 and the wiping plate 25 to move, so that the wiping plate 25 moves in contact with the outside of the cutting tool 6 to wipe and clean the surface of the cutting tool 6, thereby ensuring that the cutting tool 6 is always in a clean state when cutting the self-adhesive sticker.

[0030] For further information, see Figure 9 The covering assembly includes a positioning frame 27, which is fixedly connected to the inner side of the bracket 4. One side of the positioning frame 27 is fixedly connected to one side of the protective curtain 26, and the other side of the protective curtain 26 is fixedly connected to the side of the V-shaped block 24 close to the positioning frame 27. A linkage portion is installed on the outer edge of the screw rod 22; In this solution, after the cutting operation is completed, the screw rod 22 can be used to drive the moving block 23 and the V-shaped block 24 to move until the V-shaped block 24 is moved to the side of the cutting tool 6 away from the positioning frame 27, so that the protective curtain 26 can be unfolded on the outside of the cutting tool 6, thereby protecting the cutting tool 6 and ensuring that the cutting tool 6 is not directly exposed to the outside.

[0031] For further information, see Figure 8 and Figure 9 The linkage portion includes a driving wheel 28, which is fixed to the outer edge of the screw rod 22. A driven wheel 29 is rotatably mounted on the outer side of the bracket 4. A transmission belt 30 is sleeved on the outer edges of the driving wheel 28 and the driven wheel 29. A through hole 32 is opened on the inner wall of the bracket 4. A fan 31 is fixedly connected to the side of the driven wheel 29 near the through hole 32. The fan 31 is rotatably connected to the inner wall of the through hole 32. A guide pipe 33 is installed on the inner side of the bracket 4 at the position corresponding to the position of the fan 31 and the through hole 32. In this solution, the screw rod 22 is used to drive the driving wheel 28 to rotate synchronously when it rotates, and the transmission belt 30 can be further used to transmit the rotational force to the driven wheel 29 and the fan 31, so that the fan 31 generates wind force when it rotates, so that the wind force can pass through the through hole 32 and the through hole 32 to the position above the conveyor belt 2 on the lower side of the cutting tool 6, and then the debris generated during cutting can be blown away synchronously to prevent the self-adhesive stickers cut subsequently from sticking to each other.

[0032] For further information, see Figure 3 and Figure 9 , a fixing plate 34 is fixed to the outside of the bracket 4, and the driven wheel 29 is rotatably connected to the inner side of the fixing plate 34; In this solution, the fixed plate 34 can be used to position the driven wheel 29 during rotation, further ensuring the stability of the driven wheel 29 during rotation and ensuring that it can continue to rotate at the same position.

[0033] See Figure 8 and Figure 9The inner wall of the bracket 4 is fixed with a limit rod 35, the limit rod 35 is slidably connected to the moving block 23, the inner wall of the bracket 4 is installed with a bearing 36, and the end of the screw rod 22 away from the stepping motor 21 is rotatably connected to the inner wall of the bearing 36; In this solution, the limit rod 35 is used to guide the moving block 23, ensuring that it can move along the trajectory of the screw rod 22, ensuring that the moving block 23 will not rotate along with the rotation force of the screw rod 22, and the bearing 36 can be used to limit the screw rod 22 during rotation, ensuring that the screw rod 22 will not easily deviate from its position or swing during rotation.

[0034] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A self-adhesive cutting device comprising: Two side panels (1), a conveyor belt (2) being installed on the inner sides of the two side panels (1), and a servo motor (3) for driving the conveyor belt (2) to operate being installed on the outer sides of the side panels (1); It is characterized by: further comprising: A bracket (4) is mounted on the top of the two side panels (1), a telescopic cylinder (5) is mounted on the top of the bracket (4), a power output shaft of the telescopic cylinder (5) is fixedly connected to a cutting tool (6), a temperature control component is mounted on the top of the bracket (4), and the temperature control component is used to reduce the temperature of the cutting tool (6); and, A compression component is installed below the bracket (4) to position the adhesive label, and an interception component is installed on one side of the compression component; and A wiping component mounted on the outside of the bracket (4) for cleaning residual impurities on the outside of the cutting tool (6) and a covering component for protecting the cutting tool (6).

2. The self-adhesive cutting device according to claim 1, characterized in that: The temperature control component includes a water tank (10), the water tank (10) is installed on the top of the bracket (4), a refrigerator (11) is installed inside the water tank (10), one end of a connecting pipe (9) is fixedly connected to the inside of the water tank (10), the other end of the connecting pipe (9) is communicated with the inside of the cutting tool (6), a cavity (7) is opened inside the cutting tool (6), a plurality of cooling fins (8) are symmetrically installed on the inner wall of the cavity (7), a water pump (12) is installed on the outer edge of one end of the connecting pipe (9) close to the water tank (10), the connecting pipe (9) is slidably connected to the inner wall of the bracket (4), and the inside of the water tank (10) is filled with coolant.

3. The self-adhesive cutting device according to claim 1, characterized in that: The compression assembly comprises a downward moving plate (13), the downward moving plate (13) being fixedly connected to the output shaft of the telescopic cylinder (5), one end of four downward pressure springs (14) being symmetrically fixedly connected to the bottom of the downward moving plate (13), and the bottom ends of the four downward pressure springs (14) being fixedly connected to two pressure plates (15).

4. The self-adhesive cutting device according to claim 3, characterized in that: Four limiting shafts (16) are symmetrically mounted on the tops of the two pressing plates (15), and the four limiting shafts (16) are all slidably connected to the inner wall of the lower plate (13).

5. The self-adhesive label cutting device according to claim 1, characterized in that: The interception assembly includes a slider (17) and a material blocking plate (18), wherein the slider (17) is fixedly connected to the outer wall of the lower plate (13), the inner wall of the material blocking plate (18) is provided with a straight groove, and the inner wall of the straight groove is installed with a vertical rod (20), the bottom of the straight groove is fixedly connected to one end of a return spring (19), the other end of the return spring (19) is fixedly connected to the slider (17), and the slider (17) is slidably connected to the outside of the vertical rod (20) and the inner wall of the straight groove.

6. The self-adhesive label cutting device according to claim 1, characterized in that: The wiping assembly comprises a stepper motor (21), the stepper motor (21) being mounted on the outside of the bracket (4), the power output shaft of the stepper motor (21) being fixedly connected to a screw rod (22), the outer edge of the screw rod (22) being threadedly connected to a moving block (23), the outer side of the moving block (23) being fixedly connected to a V-shaped block (24), the inner wall of the V-shaped block (24) being mounted with a wiping plate (25), the inner side of the wiping plate (25) being in contact with the outer wall of the cutting tool (6).

7. The self-adhesive cutting device according to claim 6, characterized in that: The covering assembly includes a positioning frame (27), the positioning frame (27) is fixedly connected to the inner side of the bracket (4), one side of the positioning frame (27) is fixedly connected to one side of the protective curtain (26), the other side of the protective curtain (26) is fixedly connected to the side of the V-shaped block (24) close to the positioning frame (27), and a linkage portion is installed on the outer edge of the screw rod (22).

8. The self-adhesive label cutting device according to claim 7, characterized in that: The linkage portion includes a driving wheel (28), the driving wheel (28) is fixed to the outer edge of the screw rod (22), a driven wheel (29) is rotatably mounted on the outer side of the bracket (4), a transmission belt (30) is sleeved on the outer edges of the driving wheel (28) and the driven wheel (29), a through hole (32) is opened on the inner wall of the bracket (4), a fan (31) is fixedly connected to the side of the driven wheel (29) close to the through hole (32), the fan (31) is rotatably connected to the inner wall of the through hole (32), and a guide pipe (33) is mounted on the inner side of the bracket (4) at a position corresponding to the position of the fan (31) and the through hole (32).

9. The self-adhesive cutting device according to claim 8, characterized in that: A fixing plate (34) is fixed to the outer side of the bracket (4), and the driven wheel (29) is rotatably connected to the inner side of the fixing plate (34).

10. The self-adhesive cutting device according to claim 6, characterized in that: A limiting rod (35) is fixed to the inner wall of the bracket (4), and the limiting rod (35) is slidably connected to the moving block (23). A bearing (36) is installed on the inner wall of the bracket (4), and one end of the screw rod (22) away from the stepping motor (21) is rotatably connected to the inner wall of the bearing (36).

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