Heat shrinkage protection pipe cutting device

Abstract

The invention discloses a thermal shrinkage protection tube cutting device which is characterized in that a mounting block with a shaft rod at the top is arranged below a connecting seat, the shaft rod is positioned in a containing groove and slides up and down in the vertical direction, an elastic piece is arranged between the top of the shaft rod and the top wall of the containing groove, and an adjusting gap is formed between the connecting seat and the mounting block; two bearings are coaxially mounted on the mounting block at intervals, a tool rest with an annular tool bit is arranged on one side of the mounting block, a connecting rod is arranged on the side, opposite to the mounting block, of the tool rest, and the end, away from the tool rest, of the connecting rod penetrates through the two bearings and is matched with a fastener. The surfaces of the two side walls of the connecting base are each provided with a strip-shaped through hole in the vertical direction, and each strip-shaped through hole is in through connection with the corresponding containing groove through a strip-shaped through groove. On the basis that the annular tool bit makes elastic contact with a workpiece, deflection of the annular tool bit can be prevented, the position precision of the annular tool bit is further improved, and the cutting effect is improved.

Description

Technical Field

[0001] This invention relates to a heat shrinkable protective tube cutting device, belonging to the field of heat shrinkable sleeve cutting technology. Background Technology

[0002] Heat shrink tubing, also known as heat shrink sleeve, is a specially made polyolefin heat shrink sleeve. Heat shrink tubing offers advantages such as high-temperature shrinkage, flexibility, flame retardancy, insulation, and corrosion resistance, and is widely used for insulation protection of various wire harnesses, solder joints, and inductors, as well as rust and corrosion prevention of metal pipes and rods. Common heat shrink tubing includes PVC heat shrink tubing, PET heat shrink tubing, and adhesive-impregnated heat shrink tubing. Furthermore, to protect workpieces, heat shrink tubing is sometimes applied to the surface of certain parts of the workpiece. For example, in radiofrequency ablation needles used in radiofrequency therapy, heat shrink tubing is pre-shrunk and fitted onto the needle. The length of this portion of the heat shrink tubing is generally longer than the length of the ablation needle, and the excess tubing needs to be removed from the workpiece afterward.

[0003] In existing technologies, the annular cutter head on the drive cutting device is rotated, and then the rotating annular cutter head cuts the heat shrink tubing on the surface of the needle body to remove excess heat shrink tubing. However, in existing technologies, the annular cutter head makes hard contact with the workpiece, and it is difficult to ensure that the rotation center of the annular cutter head is aligned with the center of the drive shaft during installation. This causes the annular cutter head to wobble during rotation, resulting in offset cutting kerf or excessively wide cutting kerf and poor cutting effect. Summary of the Invention

[0004] The purpose of this invention is to provide a heat shrinkable protective tube cutting device. This device, while achieving elastic contact between the annular cutter head and the workpiece, can prevent the annular cutter head from wobbling, improve the positional accuracy of the annular cutter head, and enhance the cutting effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a heat shrinkable protective tube cutting device, comprising: a support base, a top plate provided on one side of the support base on which a vertical drive mechanism is installed, the movable end of the vertical drive mechanism being connected to the top plate; at least two connecting seats are connected to the lower surface of the top plate, the interior of the connecting seat is provided with a vertically arranged receiving groove, and the receiving groove is connected to the bottom surface of the connecting seat; a mounting block with a shaft on the top is provided below the connecting seat, the shaft is located inside the receiving groove and slides up and down vertically, an elastic element is provided between the top of the shaft and the top wall of the receiving groove, and an adjustment gap is provided between the connecting seat and the mounting block; Two bearings are coaxially spaced on the mounting block. A tool holder with an annular cutter head is provided on one side of the mounting block. A connecting rod is provided on the side of the tool holder opposite to the mounting block. The end of the connecting rod away from the tool holder passes through the two bearings and engages with a fastener. The connecting seat has a strip-shaped through hole on each of its two side wall surfaces in the vertical direction. This strip-shaped through hole is connected to the receiving groove by a strip-shaped through groove. The two strip-shaped through grooves, which are symmetrically distributed about the shaft, are arranged parallel to the axis of the annular cutter head. A fixing rod connected to the shaft is provided inside the strip-shaped through groove. When the fixing rod is located at the lower end of the strip-shaped through hole, the elastic element is in a compressed state.

[0006] The following are further improvements to the above technical solution: 1. In the above scheme, a first fixed seat and a second fixed seat are provided on the lower surface of the top plate, and a fixed sleeve is provided between the two first fixed seats and the second fixed seat. Several connecting seats are slidably installed on the circumferential outer wall of the fixed sleeve along the length direction.

[0007] 2. In the above solution, a second mounting hole is provided on one side surface of the connecting seat in a direction perpendicular to the fixed sleeve, and a locking screw that cooperates with the fixed sleeve is provided inside the second mounting hole.

[0008] 3. In the above scheme, a rotary handle with an adjusting screw is provided on the first fixed base and parallel to the fixed sleeve, and the end of the adjusting screw away from the rotary handle can pass through the first fixed base and connect to a connecting seat.

[0009] 4. In the above solution, a mounting hole is formed through the two side walls of the mounting block, and a stop ring is provided on the inner wall of the mounting hole, thereby dividing the internal space of the mounting hole into a first mounting groove and a second mounting groove, and the bearing is installed inside both the first mounting groove and the second mounting groove.

[0010] 5. In the above scheme, the axis of the mounting hole is coaxial with the axis of the annular cutter head.

[0011] 6. In the above scheme, a bushing is provided between the inner wall of the receiving groove and the circumferential outer wall of the shaft, and the shaft can slide up and down along the inner wall of the bushing.

[0012] 7. In the above scheme, the length of the strip-shaped through hole is greater than the length of the adjustment gap.

[0013] 8. In the above scheme, the top of the shaft has a second guide rod, and the elastic element is sleeved on the circumferential outer wall of the second guide rod.

[0014] 9. In the above scheme, the diameter of the shaft is 2 to 4 times the diameter of the second guide rod.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The heat shrinkable protective tube cutting device of the present invention has an elastic element provided between the top of the shaft and the top wall of the receiving groove, and an adjustable gap between the connecting seat and the mounting block. Two bearings are coaxially spaced on the mounting block. A tool holder with an annular cutter head is provided on one side of the mounting block. A connecting rod is provided on the side of the tool holder opposite to the mounting block and at the center of rotation. The end of the connecting rod away from the tool holder passes through the two bearings and cooperates with the fastener. While achieving elastic contact between the cutter head and the workpiece, it avoids the situation where the cutter head and the workpiece are in hard contact, which would cause damage to the workpiece. The connection between the connecting rod of the tool holder and the fastener through the two bearings is beneficial to improving the cutting efficiency of the tool holder. The improved positioning accuracy reduces the offset of the annular cutter head's rotation center, preventing cutter head wobbling and improving cutting performance. Furthermore, the connecting seat has vertically oriented strip-shaped through holes on both sidewalls, which are connected to the receiving groove via these slots. Two symmetrically distributed strip-shaped through slots about the shaft are parallel to the axis of the annular cutter head. A fixing rod connected to the shaft is installed inside each slot. As the shaft slides up and down within the receiving groove, the fixing rod moves up and down along the slot, preventing the annular cutter head from rotating and shifting during movement. This improves the positioning accuracy of the annular cutter head and ensures cutting precision.

[0016] 2. The heat shrinkable protective tube cutting device of the present invention has a second mounting hole through one side surface of the connecting seat in a direction perpendicular to the fixed sleeve. A fixing screw that mates with the fixed sleeve is provided inside this second mounting hole. The position of the connecting seat can be adjusted by moving the connecting seat along the fixed sleeve, and the fixing screw secures the connecting seat to the fixed sleeve. This adapts to workpieces of different lengths, meeting the cutting requirements of different length dimensions, expanding the applicability of the device. Furthermore, it has a simple structure and is easy to operate. Additionally, a rotating handle with an adjusting screw is located on the first fixed seat and parallel to the fixed sleeve. The end of the adjusting screw away from the rotating handle can pass through the first fixed seat and connect to a connecting seat. Using the connecting seat connected to the adjusting screw as the zero point, the distance between different connecting seats can be adjusted by pushing other connecting seats to slide along the fixed sleeve, thereby adapting to the cutting of workpieces of different lengths. The distance between the connecting seat and the first fixed seat can also be adjusted by rotating the handle, further improving the accuracy of the distance adjustment between the connecting seats and contributing to improved processing precision. Attached Figure Description

[0017] Appendix Figure 1This is a schematic diagram of the overall structure of the heat shrinkable protective tube cutting device of the present invention; Appendix Figure 2 This is a first-view schematic diagram of a partial structure of the heat shrinkable protective tube cutting device of the present invention; Appendix Figure 3 Appendix to this invention Figure 2 Schematic diagram of the cross section at point AA; Appendix Figure 4 This is a second-view schematic diagram of a partial structure of the heat shrinkable protective tube cutting device of the present invention; Appendix Figure 5 Appendix to this invention Figure 4 Schematic diagram of the cross section at BB; Appendix Figure 6 Appendix to this invention Figure 5 Enlarged diagram of point C.

[0018] In the attached diagrams: 1. Tool holder; 2. Top plate; 3. Support base; 4. Vertical drive mechanism; 5. Second mounting hole; 6. Fixing screw; 7. Rotating handle; 71. Adjusting screw; 81. First fixed seat; 82. Second fixed seat; 9. Fixing sleeve; 10. Annular cutter head; 11. Connecting seat; 111. Receiving groove; 12. Connecting rod; 13. Fastener; 14. Bearing; 15. Connecting plate; 16. Mounting block; 17. Shaft; 171. Second guide rod; 18. Bushing; 19. Elastic element; 20. Fixing rod; 21. Strip-shaped through hole; 22. Strip-shaped through groove; 23. Mounting hole; 241. First mounting groove; 242. Second mounting groove; 25. Stop ring. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A heat shrinkable protective tube cutting device includes: a support base 3, a top plate 2 on one side of the support base 3 on which a vertical drive mechanism 4 is installed, the movable end of the vertical drive mechanism 4 being connected to the top plate 2; at least two connecting seats 11 are connected to the lower surface of the top plate 2, the interior of each connecting seat 11 is provided with a vertically arranged receiving groove 111, and the receiving groove 111 is connected to the bottom surface of the connecting seat 11; a mounting block 16 with a shaft 17 at the top is provided below the connecting seat 11, the shaft 17 is located inside the receiving groove 111 and slides vertically up and down, an elastic element 19 is provided between the top of the shaft 17 and the top wall of the receiving groove 111, and an adjustment gap is provided between the connecting seat 11 and the mounting block 16; The top plate is lowered by the vertical drive mechanism, so that the annular cutter head and the heat shrink sleeve on the surface of the needle body are pressed into contact. The reaction force of the heat shrink sleeve on the annular cutter head drives the mounting block to move closer to the connecting seat, and the shaft moves up along the inner wall of the bushing. Two bearings 14 are coaxially spaced on the mounting block 16. A tool holder 1 with an annular cutter head 10 is provided on one side of the mounting block 16. A connecting rod 12 is provided on the side of the tool holder 1 opposite to the mounting block 16. The end of the connecting rod 12 away from the tool holder 1 passes through the two bearings 14 and cooperates with the fastener 13. At the same time, it drives the two fixed rods to slide along the inner wall of the strip groove, which compresses the elastic element between the shaft and the inner wall of the receiving groove, thus preventing the shaft from shifting during the upward movement. The connecting seat 11 has two sidewall surfaces with a vertically oriented through hole 21. The through hole 21 and the receiving groove 111 are connected by a through groove 22. The two through grooves 22, which are symmetrically distributed about the shaft 17, are parallel to the axis of the annular cutter head 10. A fixing rod 20 connected to the shaft 17 is provided inside the through groove 22. When the fixing rod 20 is located at the lower end of the through hole 21, the elastic element 19 is in a compressed state.

[0021] By connecting the connecting rod of the tool holder through two bearings and then connecting it to the fastener, the tool holder with the ring cutter head can be quickly disassembled and installed. The connecting rod is limited by the two bearings, which greatly improves the positional accuracy of the rotation center of the tool holder and avoids the ring cutter head from swaying during rotation, which is conducive to achieving neat and beautiful cuts. A first fixing seat 81 and a second fixing seat 82 are provided on the lower surface of the top plate 2, and a fixing sleeve 9 is provided between the two first fixing seats 81 and the second fixing seat 82. Several connecting seats 1 are slidably installed on the circumferential outer wall of the fixing sleeve 9 along the length direction.

[0022] After cutting, the annular cutter head separates from the heat shrink tubing and loses its pressure on the mounting block. Under the elastic force of the elastic element, it pushes the shaft downward and drives the two fixed rods to move downward along the strip groove, which avoids the position displacement of the annular cutter head, improves the positional accuracy of the annular cutter head, and also ensures the consistency of the position of the annular cutter head during multiple cutting processes. A second mounting hole 5 is provided on one side surface of the connecting seat 11 and in a direction perpendicular to the fixed sleeve 9, and a locking screw 6 that cooperates with the fixed sleeve 9 is provided inside the second mounting hole 5. The position of the connecting seat can be adjusted by moving it along the fixed sleeve, and the connecting seat can be fixed to the fixed sleeve by the fixing screw. It can adapt to workpieces of different lengths and meet the cutting needs of different length dimensions, thus expanding the applicability of the device. It also has a simple structure and is easy to operate.

[0023] A rotary handle 7 with an adjusting screw 71 is provided on the first fixed seat 81 and parallel to the fixed sleeve 9, and the end of the adjusting screw 71 away from the rotary handle 7 can pass through the first fixed seat 81 and connect to a connecting seat 11. Using the connecting seat with the adjusting screw as the zero point, the distance between different connecting seats can be adjusted by pushing other connecting seats to slide along the fixed sleeve to adapt to the cutting of workpieces of different lengths. The distance between the connecting seat and the first fixed seat can also be adjusted by rotating the handle, which further improves the accuracy of the distance adjustment between the connecting seats and helps to improve the processing accuracy.

[0024] A mounting hole 23 is formed between the two side walls of the mounting block 16, and a stop ring 25 is provided on the inner wall of the mounting hole 23, thereby dividing the internal space of the mounting hole 23 into a first mounting groove 241 and a second mounting groove 242, and the bearing 14 is installed inside both the first mounting groove 241 and the second mounting groove 242.

[0025] The axis of the mounting hole 23 is coaxial with the axis of the annular cutter head 10.

[0026] A bushing 18 is provided between the inner wall of the accommodating groove 111 and the circumferential outer wall of the shaft 17, and the shaft 17 can slide up and down along the inner wall of the bushing 18.

[0027] The top of the aforementioned shaft 17 has a second guide rod 171, and the aforementioned elastic member 19 is sleeved on the circumferential outer wall of the aforementioned second guide rod 171.

[0028] The diameter of the aforementioned shaft 17 is 2.5 times the diameter of the second guide rod 171.

[0029] Example 2: A heat shrinkable protective tube cutting device, comprising: a support base 3, a top plate 2 provided on one side of the support base 3 on which a vertical drive mechanism 4 is installed, the movable end of the vertical drive mechanism 4 being connected to the top plate 2; and at least two connecting seats 11 connected to the lower surface of the top plate 2. While achieving elastic contact between the cutter head and the workpiece, the situation of workpiece damage caused by hard contact between the cutter head and the workpiece is avoided. The connecting rod of the cutter holder passes through two bearings and is connected to the fastener, which helps to improve the positional accuracy of the cutter holder, reduces the offset of the rotation center of the ring cutter head, prevents the cutter head from wobble, and improves the cutting effect. The connecting seat 11 has a vertically arranged receiving groove 111 inside, and this receiving groove 111 is connected to the bottom surface of the connecting seat 11. A mounting block 16 with a shaft 17 on the top is arranged below the connecting seat 11. The shaft 17 is located inside the receiving groove 111 and slides up and down vertically. An elastic element 19 is arranged between the top of the shaft 17 and the top wall of the receiving groove 111. There is an adjustment gap between the connecting seat 11 and the mounting block 16. During the process of the shaft sliding up and down in the receiving groove, the fixed rod can move up and down along the strip groove, which avoids the situation where the ring cutter head rotates during the up and down movement, causing the cutter head to deviate, thus improving the positional accuracy of the ring cutter head and ensuring the cutting accuracy. Two bearings 14 are coaxially spaced on the mounting block 16. A tool holder 1 with an annular cutter head 10 is provided on one side of the mounting block 16. A connecting rod 12 is provided on the side of the tool holder 1 opposite to the mounting block 16. The end of the connecting rod 12 away from the tool holder 1 passes through the two bearings 14 and cooperates with the fastener 13. After cutting, the annular cutter head separates from the heat shrink tubing and loses its pressure on the mounting block. Under the elastic force of the elastic element, it pushes the shaft downward and drives the two fixed rods to move downward along the strip groove, which avoids the position displacement of the annular cutter head, improves the positional accuracy of the annular cutter head, and also ensures the consistency of the position of the annular cutter head during multiple cutting processes. The connecting seat 11 has two sidewall surfaces with a vertically oriented through hole 21. The through hole 21 and the receiving groove 111 are connected by a through groove 22. The two through grooves 22, which are symmetrically distributed about the shaft 17, are parallel to the axis of the annular cutter head 10. A fixing rod 20 connected to the shaft 17 is provided inside the through groove 22. When the fixing rod 20 is located at the lower end of the through hole 21, the elastic element 19 is in a compressed state.

[0030] A first fixing seat 81 and a second fixing seat 82 are provided on the lower surface of the top plate 2, and a fixing sleeve 9 is provided between the two first fixing seats 81 and the second fixing seat 82. Several connecting seats 1 are slidably installed on the circumferential outer wall of the fixing sleeve 9 along the length direction.

[0031] During the processing, depending on the actual size of the needle body, the operator turns the stop screw in reverse so that the connecting seat can slide along the outer wall of the fixed sleeve. According to the actual needs, the operator drives the adjusting screw to rotate by turning the rotating handle so that the connecting seat close to the first fixed seat moves. After adjusting to the appropriate position, the operator turns the stop screw in the forward direction to fix the connecting seat. A second mounting hole 5 is provided on one side surface of the connecting seat 11 and in a direction perpendicular to the fixed sleeve 9, and a locking screw 6 that cooperates with the fixed sleeve 9 is provided inside the second mounting hole 5.

[0032] Taking the connecting seat closest to the first fixed seat as the zero point, the distance between adjacent connecting seats is adjusted by tightening the stop screws of other connecting seats and using the connecting seat closest to the first fixed seat as a reference, in order to meet the cutting requirements of workpieces of different sizes or different cutting positions. The connecting seats are then fixed to the fixed sleeve by the stop screws. Then, the vertical mechanism is driven to move the top plate down to cut the workpiece.

[0033] At least two connecting seats 11 are provided. A rotary handle 7 with an adjusting screw 71 is provided on the first fixed seat 81 and parallel to the fixed sleeve 9. The end of the adjusting screw 71 away from the rotary handle 7 can pass through the first fixed seat 81 and connect to a connecting seat 11.

[0034] A mounting hole 23 is formed between the two side walls of the mounting block 16, and a stop ring 25 is provided on the inner wall of the mounting hole 23, thereby dividing the internal space of the mounting hole 23 into a first mounting groove 241 and a second mounting groove 242, and the bearing 14 is installed inside both the first mounting groove 241 and the second mounting groove 242.

[0035] The axis of the mounting hole 23 is coaxial with the axis of the annular cutter head 10.

[0036] The length of the aforementioned strip-shaped through hole 21 is greater than the length of the adjustment gap.

[0037] The diameter of the aforementioned shaft 17 is 3.5 times the diameter of the second guide rod 171.

[0038] A connecting plate 15 is provided between the movable end of the aforementioned vertical drive mechanism 4 and the top plate 2.

[0039] Both of the aforementioned fixed rods 20 are round rods.

[0040] The connecting rod 12 has a threaded outer wall at the end away from the tool holder 1, and the fastener 13 is a nut.

[0041] The working principle of this invention is as follows: In use, the connecting rod of the tool holder passes through two bearings in sequence and is connected to the fastener. This facilitates the quick disassembly and installation of the tool holder with the ring cutter head. The connecting rod is limited by the two bearings, which greatly improves the positional accuracy of the rotation center of the tool holder and avoids the ring cutter head from wobbling during rotation. This helps to achieve neat and beautiful cuts. Next, the top plate is driven to descend by the vertical drive mechanism, so that the annular cutter head and the heat shrink sleeve on the surface of the needle body are pressed into contact. The reaction force of the heat shrink sleeve on the annular cutter head drives the mounting block to approach the connecting seat. The shaft moves upward along the inner wall of the bushing, while driving the two fixed rods to slide along the inner wall of the strip groove, so that the elastic element between the shaft and the inner wall of the receiving groove is compressed, thus preventing the shaft from shifting during the upward movement. After cutting, the annular cutter head separates from the heat shrink tubing and loses its pressure on the mounting block. Under the elastic force of the elastic element, it pushes the shaft downward and drives the two fixed rods to move downward along the strip groove, which avoids the position displacement of the annular cutter head, improves the positional accuracy of the annular cutter head, and also ensures the consistency of the position of the annular cutter head during multiple cutting processes. During processing, depending on the actual size of the needle body, the operator rotates the stop screw in reverse to allow the connecting seat to slide along the outer wall of the fixed sleeve. According to actual needs, the operator drives the adjusting screw to rotate by turning the rotary handle, causing the connecting seat near the first fixed seat to move. After adjusting to the appropriate position, the operator rotates the stop screw in the forward direction to fix the connecting seat. Using this connecting seat as the zero point, the operator then rotates the stop screws of other connecting seats and uses the connecting seat near the first fixed seat as a reference to adjust the distance between adjacent connecting seats to meet the cutting requirements of workpieces of different sizes or different cutting positions. The operator then fixes the connecting seat to the fixed sleeve with the stop screws. Finally, the operator drives the vertical mechanism to move the top plate down to cut the workpiece.

[0042] When using the above-mentioned heat shrinkable protective tube cutting device, it avoids damage to the workpiece caused by hard contact between the cutter head and the workpiece while achieving elastic contact between the cutter head and the workpiece. The connecting rod of the cutter holder passes through two bearings and is connected to the fastener, which helps to improve the positional accuracy of the cutter holder, reduces the offset of the rotation center of the ring cutter head, prevents the cutter head from wobbling, and improves the cutting effect. Furthermore, as the shaft slides up and down within the receiving groove, the fixing rod can move up and down along the strip groove, preventing the annular cutter head from rotating and shifting during its up and down movement, thus improving the positional accuracy of the annular cutter head and ensuring cutting accuracy. Furthermore, the position of the connecting seat can be adjusted by moving the connecting seat along the fixed sleeve, and the connecting seat can be fixed on the fixed sleeve by the fixing screw. This allows it to adapt to workpieces of different lengths and meet the cutting requirements of different lengths, thus expanding the applicability of the device. It also has a simple structure and is easy to operate. Furthermore, by using the connecting seat with the adjusting screw as the zero point, other connecting seats can be pushed to slide along the fixed sleeve, thereby adjusting the distance between different connecting seats to adapt to workpieces of different lengths for cutting. The distance between the connecting seat and the first fixed seat can also be adjusted by rotating the handle, further improving the accuracy of the distance adjustment between the connecting seats and helping to improve the processing accuracy.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heat shrinkable protective tube cutting device, comprising: The support base (3) is characterized in that: a top plate (2) is provided on one side of the support base (3) on which a vertical drive mechanism (4) is installed, and the movable end of the vertical drive mechanism (4) is connected to the top plate (2); at least two connecting seats (11) are connected to the lower surface of the top plate (2), and a receiving groove (111) is provided in the interior of the connecting seat (11) in a vertical manner, and the receiving groove (111) is connected to the bottom surface of the connecting seat (11), and a mounting block (16) with a shaft (17) on the top is provided below the connecting seat (11), the shaft (17) is located inside the receiving groove (111) and slides up and down in the vertical direction, and an elastic element (19) is provided between the top of the shaft (17) and the top wall of the receiving groove (111), and there is an adjustment gap between the connecting seat (11) and the mounting block (16); Two bearings (14) are coaxially spaced on the mounting block (16). A tool holder (1) with an annular cutter head (10) is provided on one side of the mounting block (16). A connecting rod (12) is provided on the side of the tool holder (1) opposite to the mounting block (16). The end of the connecting rod (12) away from the tool holder (1) passes through the two bearings (14) and cooperates with the fastener (13). The two sidewall surfaces of the connecting seat (11) are provided with a strip-shaped through hole (21) in the vertical direction. The strip-shaped through hole (21) and the receiving groove (111) are connected by a strip-shaped through groove (22). The two strip-shaped through grooves (22) are symmetrically distributed about the shaft (17) and are arranged parallel to the axis of the annular cutter head (10). A fixing rod (20) connected to the shaft (17) is provided inside the strip-shaped through groove (22). When the fixing rod (20) is located at the lower end of the strip-shaped through hole (21), the elastic element (19) is in a compressed state.

2. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: A first fixing seat (81) and a second fixing seat (82) are provided on the lower surface of the top plate (2), and a fixing sleeve (9) is provided between the two first fixing seats (81) and the second fixing seat (82). Several connecting seats (1) are slidably installed on the circumferential outer wall of the fixing sleeve (9) along the length direction.

3. The heat shrinkable protective tube cutting device according to claim 2, characterized in that: A second mounting hole (5) is provided on one side surface of the connecting seat (11) and through it in a direction perpendicular to the fixed sleeve (9), and a stop screw (6) that cooperates with the fixed sleeve (9) is provided inside the second mounting hole (5).

4. The heat shrinkable protective tube cutting device according to claim 2, characterized in that: A rotary handle (7) with an adjusting screw (71) is provided on the first fixed seat (81) and parallel to the fixed sleeve (9), and the end of the adjusting screw (71) away from the rotary handle (7) can pass through the first fixed seat (81) and connect to a connecting seat (11).

5. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: A mounting hole (23) is provided between the two side walls of the mounting block (16), and a stop ring (25) is provided on the inner wall of the mounting hole (23), thereby dividing the internal space of the mounting hole (23) into a first mounting groove (241) and a second mounting groove (242), and the bearing (14) is installed inside both the first mounting groove (241) and the second mounting groove (242).

6. The heat shrinkable protective tube cutting device according to claim 5, characterized in that: The axis of the mounting hole (23) is coaxial with the axis of the annular cutter head (10).

7. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: A bushing (18) is provided between the inner wall of the receiving groove (111) and the circumferential outer wall of the shaft (17), and the shaft (17) can slide up and down along the inner wall of the bushing (18).

8. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: The length of the strip-shaped through hole (21) is greater than the length of the adjustment gap.

9. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: The top of the shaft (17) has a second guide rod (171), and the elastic element (19) is sleeved on the circumferential outer wall of the second guide rod (171).

10. The heat shrinkable protective tube cutting device according to claim 1, characterized in that: The diameter of the shaft (17) is 2 to 4 times the diameter of the second guide rod (171).

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