A tensioning device for a cutting thread

Abstract

The utility model belongs to the technical field of machining equipment, and disclose a kind of tensioning device for cutting line, including device ontology, the inner chamber one side of device ontology is equipped with U-shaped connecting plate, the one side of U-shaped connecting plate is equipped with U-shaped output plate, the one side of U-shaped output plate is penetrated and is equipped with tensioning groove. In the utility model, opening motor drives screw rod to rotate, and the rotation of screw rod will drive connecting block to slide down in installation groove, and U-shaped output plate is slid down by connecting block to cut single crystal silicon square bar by cutting line, and cutting line first contacts single crystal silicon square bar to enter into cutting-in section when U-shaped output plate slides down, and the cutting line is in relaxed state to cut single crystal silicon square bar, avoid that tensioning degree is too high, and cutting line will exert excessive pressure on the surface of single crystal silicon square bar, resulting in surface crack or irregular cutting mark when cutting line cuts into material.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining equipment, and specifically relates to a tensioning device for cutting wire. BACKGROUND

[0002] A wire cutting device is used for cutting single crystal silicon square rods in a processing factory, and the device cuts the single crystal silicon square rods into thin slices or required shapes by pulling a diamond wire along a predetermined track on the surface of the silicon square rods under precise control. The high hardness and sharpness of the diamond wire enable the wire to effectively cut the single crystal silicon material with high hardness. The grinding force generated during the cutting process is small, thereby reducing thermal damage and mechanical stress of the material and ensuring that the surface of the silicon wafer is smooth and has high precision.

[0003] In the traditional square cutting process, a fixed cutting speed and a fixed tension are usually used, and the tension of the cutting wire cannot be adjusted during the cutting process. When the cutting wire cuts the material, the entry segment is the area where the cutting wire first contacts the material. If the tension is too high, the cutting wire will exert excessive pressure on the surface of the material, and excessive entry force may cause surface cracks or irregular cutting marks when the cutting wire cuts into the material, affecting the cutting quality and even damaging the structure of the material. At the same time, after the cutting wire successfully cuts into the material and enters the cutting segment, the cutting process needs to maintain appropriate tension to ensure stable cutting effect. The cutting wire in the cutting segment needs to maintain a certain tension to continuously and uniformly apply cutting pressure to the material. If the tension is too loose, the cutting wire cannot effectively cut into the material, affecting the cutting effect. In addition, during the return phase, the cutting wire is usually in a low load state. If the tension is continuously maintained, the cutting wire may accidentally contact the surface of the single crystal silicon square rod, causing secondary damage. SUMMARY

[0004] To solve the problems of the prior art, the utility model provides a tensioning device for cutting wire.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of tensioning device for cutting line, the inner chamber one side of the device body is equipped with U-shaped connecting plate, the one side of the U-shaped connecting plate is equipped with U-shaped output plate, the one side of the U-shaped output plate is penetrated and is equipped with tensioning groove, the inner chamber top of the tensioning groove is equipped with limit slot one, the inner chamber of the tensioning groove is slidably connected with mounting block, the top of the mounting block is fixedly connected with limit block one, and limit block one slides in limit slot one, the one side of the limit block one is penetrated tensioning groove and is rotatably connected with connecting rod, the one side of the connecting rod away from limit block one is rotatably connected with tensioning wheel, the one side inside of the U-shaped output plate located tensioning groove is equipped with output slot one;

[0006] The bottom of the output slot one and the tensioning groove is equipped with toothed plate groove, the inside of the toothed plate groove is slidably connected with sliding plate, the top one side of the sliding plate is fixedly connected with rack one, the top one side of the sliding plate away from rack one is fixedly connected with push plate, and push plate cooperates with sliding plate, the one side of the U-shaped output plate is penetrated and is rotatably connected with rotating rod, one end of the rotating rod is fixedly connected with gear one, and gear one is engagedly connected with rack one, the outer wall of the one side of the rotating rod away from gear one is fixedly connected with gear two, and the end of the rotating rod away from gear one is rotatably connected with limit block two.

[0007] Preferably, the top of the sliding plate is equipped with tooth block groove at both ends of the rack one, the inside of the tooth block groove is slidably connected with tooth block, the inner chamber of the one side of the tooth block groove is fixedly connected with two sliding rods, and the sliding rod penetrates the tooth block, and the outer wall of the two tooth blocks is sleeved with spring and cooperates with the tooth block.

[0008] Preferably, the one side of the U-shaped connecting plate is equipped with connecting groove, the inner chamber one side of the connecting groove is fixedly connected with rack two, and rack two is engagedly connected with gear two.

[0009] Preferably, the inner chamber of the connecting groove is equipped with limit slot two near the one side of the rack two, and limit slot two cooperates with limit block two.

[0010] Preferably, the both sides of the U-shaped connecting plate are penetrated and are equipped with mounting groove, the inner chamber of two mounting grooves is rotatably connected with threaded rod, the outer wall of two threaded rods is threadedly connected with connecting block, and the one side of the connecting block is fixedly connected with the U-shaped output plate, the top inside of the U-shaped connecting plate is equipped with output slot two.

[0011] Preferably, the top of two threaded rods is penetrated and rotatably connected with output slot two, the outer wall of two threaded rods inside output slot two is fixedly connected with synchronous wheel, and the outer wall of two synchronous wheels is sleeved with synchronous belt.

[0012] Preferably, the top side of the U-shaped connecting plate is penetrated and mounted with a motor, the output end of the motor is fixedly connected with an output rod, and the end of the output rod away from the motor is fixedly connected with a threaded rod on one side.

[0013] Preferably, the inner cavity of the device body is rotatably connected with a discharging rotating disc on the side away from the U-shaped connecting plate, and the front side of the device body is penetrated and provided with two visual windows for observing the inside of the device body.

[0014] Preferably, the U-shaped output plate is mounted with four wire wheels on the side away from the limiting block two, and the inside of the four wire wheels is mounted with cutting wires.

[0015] Preferably, the edge part of the U-shaped output plate on the side close to the wire wheel is fixedly connected with a U-shaped baffle for blocking the cutting wire to avoid the cutting wire from being thrown out when the cutting wire fails.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a motor and the cooperation of U-shaped output plate and other structures are set up, avoid the tension degree excessively high, cutting wire will exert too big pressure to the surface of monocrystalline silicon square bar, cause the cutting wire to cut into the material when causing surface crack or irregular cutting trace, open motor drive screw rod rotation, the rotation of screw rod will drive the connecting block to slide down in the installation groove, drive the U-shaped output plate to slide down through the connecting block and cut monocrystalline silicon square bar, when the U-shaped output plate slides down, cutting wire first contacts monocrystalline silicon square bar and enters into the cutting-in section, and the cutting wire is in the relaxed state to cut monocrystalline silicon square bar at this time, avoid the tension degree excessively high, cutting wire will exert too big pressure to the surface of monocrystalline silicon square bar, cause the cutting wire to cut into the material when causing surface crack or irregular cutting trace.

[0018] The utility model discloses a motor and the cooperation of U-shaped output plate and other structures are set up, avoid the tension degree excessively high, cutting wire will exert too big pressure to the surface of monocrystalline silicon square bar, cause the cutting wire to cut into the material when causing surface crack or irregular cutting trace, open motor drive screw rod rotation, the rotation of screw rod will drive the connecting block to slide down in the installation groove, drive the U-shaped output plate to slide down through the connecting block and cut monocrystalline silicon square bar, when the U-shaped output plate slides down, cutting wire first contacts monocrystalline silicon square bar and enters into the cutting-in section, and the cutting wire is in the relaxed state to cut monocrystalline silicon square bar at this time, avoid the tension degree excessively high, cutting wire will exert too big pressure to the surface of monocrystalline silicon square bar, cause the cutting wire to cut into the material when causing surface crack or irregular cutting trace.

[0019] The utility model discloses a structure which is simple in structure, convenient to use and low in cost, and the sliding plate and the mounting block are cooperated to avoid that the cutting line is too tight in the wire returning section and may accidentally contact the surface of the monocrystalline silicon square rod, causing secondary damage, the motor is started to make the output rod reverse and drive the two threaded rods to reverse, the connecting block drives the U-shaped output plate to move up at the moment, gear no. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0021] Figure 2 It is the inside schematic diagram of the device body of the utility model;

[0022] Figure 3 It is the side sectional view of the device body of the utility model;

[0023] Figure 4 It is the rear view of the U-shaped output plate of the utility model;

[0024] Figure 5 It is the side sectional view of the U-shaped output plate of the utility model;

[0025] Figure 6 It is the utility model Figure 5 It is the enlarged view of A in the utility model;

[0026] Figure 7 It is the schematic diagram of the tension pulley and the push plate of the utility model;

[0027] Figure 8 It is the sectional view of the sliding plate of the utility model;

[0028] Figure 9 It is the partial sectional view of the U-shaped connecting plate of the utility model;

[0029] Figure 10 It is the utility model Figure 9 It is the enlarged view of B in the utility model;

[0030] Figure 11 It is the side sectional view of the U-shaped connecting plate of the utility model.

[0031] In the diagram: 1. Device body; 2. U-shaped connecting plate; 3. U-shaped output plate; 4. Tensioning groove; 5. Limiting groove one; 6. Mounting block; 7. Limiting block one; 8. Connecting rod; 9. Tensioning wheel; 10. Output groove one; 11. Gear plate groove; 12. Sliding plate; 13. Rack one; 14. Push plate; 15. Rotating rod; 16. Gear one; 17. Gear two; 18. Limiting block two; 19. Gear block groove; 20. Sliding rod; 21. Spring; 22. Gear block; 23. Connecting groove; 24. Rack two; 25. Limiting groove two; 26. Mounting groove; 27. Threaded rod; 28. Connecting block; 29. ​​Output groove two; 30. Motor; 31. Output rod; 32. Synchronous pulley; 33. Synchronous belt; 34. Threaded wheel; 35. Cutting line; 36. Feeding rotary table; 37. Viewing window; 38. U-shaped baffle. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 11 As shown, this utility model provides a tensioning device for cutting wire, including a device body 1. A U-shaped connecting plate 2 is installed on one side of the inner cavity of the device body 1. A U-shaped output plate 3 is installed on one side of the U-shaped connecting plate 2. A tensioning groove 4 is provided through one side of the U-shaped output plate 3. A limiting groove 5 is provided at the top of the inner cavity of the tensioning groove 4. An installation block 6 is slidably connected to the inner cavity of the tensioning groove 4. A limiting block 7 is fixedly connected to the top of the installation block 6 and slides in the limiting groove 5. A connecting rod 8 is rotatably connected through the tensioning groove 4 on one side of the limiting block 7. A tensioning wheel 9 is rotatably connected to the side of the connecting rod 8 away from the limiting block 7. An output groove 10 is provided inside the U-shaped output plate 3 located on one side of the tensioning groove 4.

[0034] The bottom of the output groove 10 and the tension groove 4 are provided with toothed groove 11. A sliding plate 12 is slidably connected inside the toothed groove 11. A rack 13 is fixedly connected to one side of the top of the sliding plate 12. A push plate 14 is fixedly connected to the side of the top of the sliding plate 12 away from the rack 13. The push plate 14 cooperates with the sliding plate 12. A rotating rod 15 is rotatably connected through one side of the U-shaped output plate 3. A gear 16 is fixedly connected to one end of the rotating rod 15. The gear 16 meshes with the rack 13. A gear 2 17 is fixedly connected to the outer wall of the side of the rotating rod 15 away from the gear 16. A limit block 2 18 is rotatably connected to the end of the rotating rod 15 away from the gear 16.

[0035] The top of the sliding plate 12 is provided with a tooth block groove 19 at both ends of the rack 13, the tooth block groove 19 is slidably connected with a tooth block 22, the inner cavity of the tooth block groove 19 at one side is fixedly connected with two sliding rods 20, the sliding rods 20 penetrate through the tooth blocks 22, the outer walls of the two tooth blocks 22 are sleeved with springs 21 which are matched with the tooth blocks 22;

[0036] The U-shaped connecting plate 2 is provided with a connecting groove 23 at one side, the inner cavity of the connecting groove 23 is fixedly connected with a rack two 24 at one side, and the rack two 24 is meshingly connected with the gear two 17;

[0037] The inner cavity of the connecting groove 23 is provided with a limiting groove two 25 at one side close to the rack two 24, and the limiting groove two 25 is matched with the limiting block two 18;

[0038] The U-shaped connecting plate 2 is provided with a mounting groove 26 penetrating through both sides, the inner cavities of the two mounting grooves 26 are rotatably connected with threaded rods 27, the outer walls of the two threaded rods 27 are threadedly connected with connecting blocks 28, one side of the connecting block 28 is fixedly connected with the U-shaped output plate 3, and the top of the U-shaped connecting plate 2 is provided with an output groove two 29;

[0039] The top of the two threaded rods 27 penetrates through the output groove two 29 and is rotatably connected, the outer walls of the two threaded rods 27 in the inner part of the output groove two 29 are fixedly connected with synchronous wheels 32, and the outer walls of the two synchronous wheels 32 are sleeved with a synchronous belt 33;

[0040] The top of the U-shaped connecting plate 2 is provided with a motor 30 penetrating through and mounted at one side, the output end of the motor 30 is fixedly connected with an output rod 31, and one end of the output rod 31 away from the motor 30 is fixedly connected with the threaded rod 27 at one side.

[0041] By adopting the above scheme, when the U-shaped output plate 3 slides downward, the cutting line 35 first contacts the single crystal silicon square rod and enters the cutting-in section, at this time, the cutting line 35 is in a relaxed state, the single crystal silicon square rod is cut, the tension is not too high, the cutting line will exert excessive pressure on the surface of the single crystal silicon square rod, and surface cracks or irregular cutting marks will be caused when the cutting line cuts into the material;

[0042] Meanwhile, the limiting block two 18 slides downward in the limiting groove two 25 while the gear two 17 meshes with the gear rack two 24 to rotate the rotating rod 15, which drives the gear one 16 to rotate, so that the gear one 16 meshes with the gear rack one 13 to drive the sliding plate 12 to slide in the toothed plate groove 11; when the sliding plate 12 moves, the mounting block 6 slides in the tensioning groove 4 through the push plate 14, and the limiting block one 7 slides in the limiting groove one 5; when the mounting block 6 slides in the tensioning groove 4, the connecting rod 8 and the tensioning wheel 9 are driven to move, and the movement of the tensioning wheel 9 can drive the cutting line 35 to be taut; at this time, the cutting line 35 has just entered the cutting section from the entering knife section, and the cutting line 35 is taut in the cutting section to cut the single crystal silicon square rod, which can avoid that the cutting line 35 is too loose to effectively cut into the material, thereby affecting the cutting effect.

[0043] When the cutting is completed and enters the wire returning stage, the cutting line 35 is in a taut state, the motor 30 is started to reverse the output rod 31, which drives the two threaded rods 27 to reverse; at this time, the connecting block 28 drives the U-shaped output plate 3 to move upward, the gear two 17 meshes with the limiting block two 18 to drive the rotating rod 15 to reverse, and the gear one 16 reverses at the same time; the gear one 16 reverses to mesh with the gear rack one 13 to reset the sliding plate 12, and the mounting block 6, the limiting block one 7, the connecting rod 8 and the tensioning wheel 9 are reset through the sliding plate 12; the tensioning wheel 9 is reset to cancel the extrusion of the tensioning wheel 9 on the cutting line 35, so that the cutting line 35 is released from the taut state, which avoids that the cutting line 35 is too taut in the wire returning section and may accidentally contact the surface of the single crystal silicon square rod, thereby causing secondary damage.

[0044] When the gear one 16 meshes with the gear rack one 13 to drive the sliding plate 12 to a certain position during the cutting, the gear one 16 meshes with the toothed block 22 to drive the toothed block 22 to slide in the toothed block groove 19 while compressing the spring 21; at this time, the gear one 16 is idling to avoid that the tensioning force is too large to cause the cutting line 35 to break;

[0045] When the gear one 16 meshes with the gear rack one 13 to drive the sliding plate 12 to reset to a certain position during the resetting, the gear one 16 meshes with the toothed block 22 to drive the toothed block 22 to slide in the toothed block groove 19 while compressing the spring 21; at this time, the gear one 16 is idling to avoid the problem that the gear one 16 and the gear rack one 13 are clamped;

[0046] When the motor 30 is started, the output rod 31 drives the threaded rod 27 to rotate, which drives the synchronous wheel 32 and the synchronous belt 33 to rotate, drives the threaded rod 27 at the other end and the synchronous wheel 32 to rotate through the synchronous belt 33, drives the connecting block 28 to slide downward in the mounting groove 26 through the rotation of the threaded rod 27, and drives the U-shaped output plate 3 to slide downward through the cutting line 35 to cut the single crystal silicon square rod.

[0047] As shown in Figures 1 to 11 The inner cavity of the device body 1 is rotationally connected with a discharging rotating disc 36 away from one side of the U-shaped connecting plate 2, two visual windows 37 are provided through the front side of the device body 1, and the inside of the device body 1 can be observed through the visual windows 37.

[0048] Four wire wheels 34 are mounted on the side of the U-shaped output plate 3 away from the limiting block two 18, and the cutting line 35 is mounted in the four wire wheels 34.

[0049] The edge part of the side of the U-shaped output plate 3 close to the wire wheel 34 is fixedly connected with a U-shaped baffle 38, and the cutting line 35 can be blocked by the U-shaped baffle 38 to avoid being thrown out when the cutting line 35 fails.

[0050] The above scheme is adopted: the single crystal silicon square rod is placed on the discharging rotating disc 36, the single crystal silicon square rod is adjusted to rotate to adjust the cutting position through the discharging rotating disc 36, the cutting condition of the single crystal silicon square rod can be observed through the visual window 37, and the cutting line 35 can be blocked by the U-shaped baffle 38 to avoid being thrown out when the cutting line 35 fails, thereby avoiding the problem of safety.

[0051] The working principle and use process of the utility model are as follows:

[0052] When the single crystal silicon square rod needs to be cut, the single crystal silicon square rod is first placed on the discharging rotating disc 36, and then the output rod 31 drives the threaded rod 27 to rotate when the motor 30 is started, which drives the synchronous wheel 32 and the synchronous belt 33 to rotate, drives the threaded rod 27 at the other end and the synchronous wheel 32 to rotate through the synchronous belt 33, drives the connecting block 28 to slide downward in the mounting groove 26 through the rotation of the threaded rod 27, and drives the U-shaped output plate 3 to slide downward through the cutting line 35 to cut the single crystal silicon square rod, the cutting line 35 first contacts the single crystal silicon square rod to enter the cutting-in section when the U-shaped output plate 3 slides downward, the cutting line 35 is in a relaxed state to cut the single crystal silicon square rod, the tension is not too high, the cutting line will not exert excessive pressure on the surface of the single crystal silicon square rod, and surface cracks or irregular cutting marks will not be caused when the cutting line cuts into the material.

[0053] Meanwhile in U-shaped output plate 3 downwardly moving cutting, limit block two 18 will slide down in limit groove two 25, and gear two 17 meshes with rack two 24 to make rotating rod 15 rotate, which will drive gear one 16 to rotate, making gear one 16 mesh with rack one 13 to make sliding plate 12 slide in toothed plate slot 11, when sliding plate 12 moves, it pushes mounting block 6 to slide in tension slot 4 through push plate 14, and limit block one 7 slides in limit slot one 5, when mounting block 6 slides in tension slot 4, it drives connecting rod 8 and tension wheel 9 to move, which can drive cutting line 35 to be taut, at this time cutting line 35 just enters cutting section from cutting-in section, and cutting line 35 is taut in cutting section to cut single crystal silicon square rod, which can avoid that cutting line 35 is too loose to effectively cut into the material, affecting the cutting effect, when gear one 16 meshes with rack one 13 to drive sliding plate 12 to a certain position, gear one 16 will mesh with toothed block 22 to drive toothed block 22 to slide in toothed block slot 19, and spring 21 is compressed at the same time, at this time gear one 16 is idle, avoiding that the tension is too large to cause the rupture of cutting line 35.

[0054] When cutting is completed and enters the wire returning stage, cutting line 35 is in a taut state at this time, start motor 30 to make output rod 31 reverse, and drive two threaded rods 27 to reverse at the same time, connecting block 28 will drive U-shaped output plate 3 to move upward at this time, when U-shaped output plate 3 moves upward, gear two 17 meshes with limit block two 18 to drive rotating rod 15 to reverse, and gear one 16 is reversed at the same time, when gear one 16 reverses, it meshes with rack one 13 to reset sliding plate 12, and mounting block 6, limit block one 7, connecting rod 8 and tension wheel 9 are reset through sliding plate 12, the extrusion of cutting line 35 by tension wheel 9 is cancelled through the resetting of tension wheel 9, so that cutting line 35 is released from the taut state, avoiding that cutting line 35 is too taut in the wire returning section, which may accidentally contact the surface of single crystal silicon square rod, causing secondary damage, when gear one 16 meshes with rack one 13 to drive sliding plate 12 to reset to a certain position, gear one 16 will mesh with toothed block 22 to drive toothed block 22 to slide in toothed block slot 19, and spring 21 is compressed at the same time, at this time gear one 16 is idle, avoiding the problem that gear one 16 meshes with rack one 13.

[0055] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0056] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A tensioning device for cutting thread, comprising a device body (1), characterized in that: The inner cavity side of the device body (1) is provided with a U-shaped connecting plate (2), one side of the U-shaped connecting plate (2) is provided with a U-shaped output plate (3), one side of the U-shaped output plate (3) penetrates and is provided with a tensioning groove (4), the inner cavity top of the tensioning groove (4) is provided with a limiting groove (5), the inner cavity of the tensioning groove (4) is slidably connected with a mounting block (6), the top of the mounting block (6) is fixedly connected with a limiting block (7), and the limiting block (7) slides in the limiting groove (5), one side of the limiting block (7) penetrates the tensioning groove (4) and is fixedly connected with a connecting rod (8), and the side away from the limiting block (7) of the connecting rod (8) is rotatably connected with a tensioning wheel (9), and the inside of one side of the U-shaped output plate (3) located in the tensioning groove (4) is provided with an output groove (10). The bottom of the output groove (10) and the tensioning groove (4) is provided with a toothed plate groove (11), the inside of the toothed plate groove (11) is slidably connected with a sliding plate (12), one side of the top of the sliding plate (12) is fixedly connected with a rack (13), the top of the sliding plate (12) is fixedly connected with a push plate (14) away from the rack (13), and the push plate (14) is matched with the sliding plate (12), one side of the U-shaped output plate (3) penetrates and is rotatably connected with a rotating rod (15), one end of the rotating rod (15) is fixedly connected with a gear (16), and the gear (16) is meshingly connected with the rack (13), the outer wall of the side away from the gear (16) of the rotating rod (15) is fixedly connected with a gear (17), and the end away from the gear (16) of the rotating rod (15) is rotatably connected with a limiting block (18).

2. The tensioning device for a cutting thread according to claim 1, characterized in that: The top of the sliding plate (12) is provided with a tooth block groove (19) at both ends of the rack (13), the inside of the tooth block groove (19) is slidably connected with a tooth block (22), the inner cavity of one side of the tooth block groove (19) is fixedly connected with two sliding rods (20), and the sliding rods (20) penetrate the tooth block (22), the outer walls of the two tooth blocks (22) are sleeved with springs (21) and the springs (21) are matched with the tooth blocks (22).

3. The tensioning device for a cutting thread according to claim 1, characterized in that: One side of the U-shaped connecting plate (2) is provided with a connecting groove (23), the inner cavity of the connecting groove (23) is fixedly connected with a rack (24) on one side, and the rack (24) is meshingly connected with the gear (17).

4. The tensioning device for a cutting thread according to claim 3, characterized in that: The inner cavity of the connecting groove (23) is provided with a limiting groove (25) on one side close to the rack (24), and the limiting groove (25) is matched with the limiting block (18).

5. The tensioning device for a cutting thread according to claim 1, characterized in that: Both sides of the U-shaped connecting plate (2) penetrate and are provided with a mounting groove (26), the inner cavities of the two mounting grooves (26) are rotatably connected with threaded rods (27), the outer walls of the two threaded rods (27) are threadedly connected with connecting blocks (28), one side of the connecting block (28) is fixedly connected with the U-shaped output plate (3), and the top of the U-shaped connecting plate (2) is provided with an output groove (29) inside.

6. The tensioning device for a cutting thread according to claim 5, characterized in that: The top of two threaded rods (27) penetrates and is rotatably connected with the output slot two (29), the outer wall of the inside of the output slot two (29) is fixedly connected with a synchronous wheel (32), the outer wall of two synchronous wheels (32) is sleeved with a synchronous belt (33).

7. The tensioning device for a cutting thread according to claim 1, characterized in that: The top of the U-shaped connecting plate (2) penetrates and is installed with a motor (30), the output end of the motor (30) is fixedly connected with an output rod (31), and the end, away from the motor (30), of the output rod (31) is fixedly connected with a threaded rod (27) on one side.

8. The tensioning device for a cutting thread according to claim 1, characterized in that: The inner cavity of the device body (1), away from the U-shaped connecting plate (2), is rotatably connected with a discharging rotating disc (36), and the front side of the device body (1) penetrates and is provided with two visual windows (37), so that the inside of the device body (1) can be observed through the visual windows (37).

9. The tensioning device for a cutting thread according to claim 1, characterized in that: The U-shaped output plate (3), away from the limiting block two (18), is installed with four wire wheels (34), and the inside of the four wire wheels (34) is installed with cutting wires (35).

10. The tensioning device for a cutting thread according to claim 1, characterized in that: The edge part of the U-shaped output plate (3), close to the wire wheel (34), is fixedly connected with a U-shaped baffle (38), so that the cutting wire (35) can be blocked, and the cutting wire (35) can be prevented from being thrown out when it fails.

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