Cable protection pipe cut-off machine and cut-off method

Abstract

The invention provides a cable protection pipe cut-off machine and cut-off method.The cable protection pipe cut-off machine comprises a cutting assembly, a first driving part used for driving the cutting assembly to rotate around a protection pipe in the circumferential direction and a feeding device used for conveying the protection pipe into a cutting box, and the cutting box comprises a first circumferential clamp and a second circumferential clamp which are used for clamping the protection pipe; the device further comprises a lifting assembly used for adjusting the position of the cutting box and enabling the axis of the first circumferential clamp, the axis of the second circumferential clamp and the axis of the protection pipe to coincide. According to the scheme, the mode of clamping, pushing and cutting is adopted, precise measurement of the pipe diameter and the pipe length is achieved, the mode of manual measurement is replaced, and the cutting efficiency of the protection pipe is improved; and meanwhile, a cutting knife and a saw blade in the cutting mechanism can be used for cutting according to the material of the protective tube, so that the cutting range of the protective tube is expanded, and the production cost is saved.

Description

Technical Field

[0001] The present disclosure relates to the field of cutting machines, and in particular to a cable protection tube cutting machine and a cutting method. Background Art

[0002] Cable protection tubes are mainly installed in areas where communication cables and power lines intersect to prevent power line disconnection and short circuit accidents, and also play a certain role in isolating the magnetic field interference of the power lines.

[0003] With the development of the times, composite materials made of cement or other non-metallic materials are gradually replaced by fiberglass, PVC (polyvinyl chloride), and MPP (modified polypropylene). In order to achieve the purpose of cable protection, the cable protection tube needs to be cut into protection tube sections of different lengths according to usage requirements.

[0004] Due to the different materials of cable protection tubes, different cutting methods are required for cable protection tubes; MPP and softer material protection tubes need to be cut with unpowered tools, and PVC and FRP material protection tubes need to be sawed with powered rolling cutters; under normal circumstances, the cable length needs to be measured during the manual or auxiliary machine sawing process, and different material protection tubes also need to be cut with different equipment. The selection of equipment and the measurement of the protection tube length affect the sawing efficiency of the cable protection tube. Summary of the invention

[0005] The present disclosure provides a cable protection tube cutting machine and a cutting method to at least solve the above technical problems existing in the prior art.

[0006] According to a first aspect of the present disclosure, there is provided a cable protection tube cutting machine, a cutting box; A cutting assembly and a first driving member, wherein the cutting assembly is rotatably mounted in the cutting box and is located on the peripheral side of the protection tube, and the first driving member is used to drive the cutting assembly to rotate around the peripheral direction of the protection tube; The cutting assembly comprises a cutting mechanism and a second driving member, wherein the cutting mechanism is mounted on the first driving member, and the second driving member is used to drive the cutting mechanism to move radially along the protective tube; The cutting mechanism includes a saw blade, a cutting knife, and a driving source for driving the saw blade to rotate or driving the cutting knife to switch between a first state and a second state; The feeding device includes a clamping plate assembly and a third driving member for driving the clamping plate assembly to move along the axial direction of the protection tube. The clamping plate assembly is used to clamp the protection tube and feed it into the cutting box. The clamping plate assembly is provided with a distance measuring mechanism for measuring the diameter of the protection tube. The circumferential clamp comprises a first circumferential clamp and a second circumferential clamp installed on both sides of the cutting box, and the first circumferential clamp and the second circumferential clamp are arranged along the axial direction of the protection tube; A lifting assembly is fixedly mounted on a frame outside the cutting box, and a lifting end of the lifting assembly is connected to the cutting box to adjust the first circumferential fixture, the second circumferential fixture, and the protective tube axis to coincide with each other; During initial positioning, the end wall of the protection tube abuts against the end wall of the circumferential fixture away from the feeding device.

[0007] In one embodiment, the cutting assembly further comprises: A rotating plate, the rotating plate is rotatably mounted in the inner cavity of the cutting box, a through hole is provided on the rotating plate for the protection tube to pass through, and a first driving member is connected to the rotating plate to drive the rotating plate to rotate around the axis of the protection tube; The slide rail is fixedly mounted on one side of the perforation of the rotating plate; The counterweight mechanism and the cutting mechanism are both slidably connected to the slide rail, and the counterweight mechanism and the cutting mechanism are symmetrically arranged relative to the axis of the perforation; The second driving member is respectively connected to the counterweight mechanism and the cutting mechanism for driving the counterweight mechanism and the cutting mechanism to synchronously move toward or away from the axis of the protection tube.

[0008] In one embodiment, the cutting mechanism further comprises: A spline shaft, the spline shaft is fixedly connected to the output shaft of the driving source, and the saw blade is fixed on the end wall of the spline shaft away from the driving source; A spline sleeve, which is sleeved on the spline shaft to form a spline connection; A mounting seat, the mounting seat sleeve is arranged outside the spline sleeve and is rotatably connected to the spline sleeve, and the cutting knife is fixedly mounted on the mounting seat; A locking member is installed between the mounting seat and the spline sleeve to realize switching between a locked state and an unlocked state of the mounting seat and the spline sleeve.

[0009] In one embodiment, the locking member includes: A mounting hole, the mounting hole being arranged on the inner wall of the mounting seat; A lock tongue, wherein the lock tongue is slidably mounted in the mounting hole; A locking groove, a plurality of which are provided and located on the peripheral wall of the spline sleeve; A first spring, the first spring is installed in the installation hole, one end of the first spring abuts against the inner wall of the installation hole, and the other end of the first spring abuts against the end wall of the lock tongue; In the locked state, the lock tongue is inserted into the locking groove, and in the unlocked state, the lock tongue is separated from the locking groove.

[0010] In one possible implementation, the mounting seat is provided with a plug hole, and when the cutting knife is installed in the plug hole, the projection of the cutting portion of the cutting knife on the saw blade along the axial direction of the output shaft of the driving source is located outside the saw blade; In the first state, the cutting knife is arranged away from the protection tube. In the second state, the cutting knife abuts against the protection tube and forms an angle α with the first direction. The first direction is the direction of the line connecting the center of the saw blade and the axis of the protection tube.

[0011] In one possible implementation, the cutting mechanism further includes a positioning plate; The positioning plate is slidably connected to the slide rail via a slider; The limit seat is fixedly mounted on the positioning plate, and the limit seat is rotatably connected with the mounting seat through a bearing; A rotation groove coaxial with the mounting seat is recessed on the limit seat, and a first end wall and a second end wall are provided in the rotation groove. A limit block inserted into the rotation groove is fixedly provided on the mounting seat. In the first state, the side wall of the limit block abuts against the first end wall, and in the second state, the side wall of the limit block abuts against the second end wall.

[0012] In one embodiment, the cutting mechanism further comprises an avoidance ring groove arranged on the peripheral wall of the spline sleeve, and the avoidance ring groove and the locking groove are distributed along the axial direction of the spline sleeve; The electromagnetic component is sleeved on the outer side of the output shaft of the driving source to realize the axial movement of the spline sleeve along the output shaft of the driving source. In the first state, the electromagnetic component is powered off and the lock tongue is inserted into the avoidance ring groove. In the second state, the electromagnetic component is powered on and the lock tongue is inserted into the locking groove.

[0013] In one possible embodiment, the electromagnetic component includes, The first seat body is fixedly mounted on the positioning plate, and an electromagnetic coil is fixedly mounted on the first seat body; A second seat body, the second seat body is slidably connected to the first seat body along the axial direction of the output shaft of the driving source, the second seat body is connected to the spline sleeve through a bearing, and an armature ring adapted to the electromagnetic coil is fixed on the second seat body; A second spring, the second spring is arranged between the first seat body and the second seat body, one end of the second spring is connected to the first seat body, and the other end of the second spring is connected to the second seat body; A limiting column, which is fixedly mounted on the second seat body, passes through the positioning plate and extends vertically upward; In the first state, the peripheral wall of the limiting column abuts against the outer wall of the mounting seat to limit the mounting seat from switching to the second state. In the second state, the limiting column releases the abutment against the outer wall of the mounting seat.

[0014] In one embodiment, the circumferential fixture comprises a positioning plate, The positioning disc is fixedly mounted on the cutting box, and a plurality of clamping claws evenly distributed along the circumference of the positioning disc are rotatably connected to the positioning disc through a first screw, and a clamping roller is rotatably connected to one end of the clamping claw close to the axis of the positioning disc, and a second screw and a third screw are arranged at one end of the clamping claw away from the axis of the positioning disc, and the second screw and the third screw on two adjacent clamping claws are rotatably connected through a synchronous connecting rod; One of the clamping claws is provided with a driving rod extending to the outside of the positioning plate, and the cutting box is rotatably connected with a clamping electric cylinder, and the output end of the clamping electric cylinder is rotatably connected with the driving rod.

[0015] The clamping plate assembly includes a first clamping plate and a second clamping plate located on both sides of the protection tube, and a fourth driving member driving the first clamping plate and the second clamping plate to move; The fourth driving member includes a double-ended reverse screw and a fourth servo motor driving the double-ended reverse screw to rotate, the first clamping plate and the second clamping plate are both threadedly connected to the double-ended reverse screw, and a zero point for resetting the first clamping plate and the second clamping plate to an original state is arranged inside the fourth servo motor; The third driving member includes a rack, a driving gear and a third servo motor, the rack is arranged on the frame along the axial direction of the protection tube, the output shaft of the third servo motor is fixedly connected to the driving gear, the driving gear and the rack are meshed with each other, and the third servo motor is fixedly installed on the clamping plate assembly; The first circumferential clamp is located at a side far away from the feeding device, and the second circumferential clamp is located at a side close to the feeding device.

[0016] According to a second aspect of the present disclosure, there is provided a cable protection tube cutting method, comprising the above-mentioned cable protection tube cutting machine; The cable protection tube is cut as follows: S1: placing the protective tube on the frame between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are at zero position, and the distance between the first clamping plate and the second clamping plate is D1; S2: The fourth servo motor drives the double-headed reverse screw to rotate, so that the first clamping plate and the second clamping plate move toward the protection tube synchronously. When the torque of the fourth servo motor increases instantaneously, the fourth servo motor stops running to achieve the clamping of the protection tube; S3: According to the number of revolutions of the fourth servo motor, the distance D2 traveled by the first clamping plate and the second clamping plate is calculated, and the diameter of the protection tube D3=D1-2×D2 is calculated; S4: Using the lifting assembly to adjust the position of the cutting box so that the axes of the first circumferential fixture and the second circumferential fixture are coaxial with the axis of the protection tube; S5: Using the clamping electric cylinder to close the first circumferential clamp and open the second circumferential clamp, and using the second driving member to drive the cutting mechanism to move radially outward along the protection tube to remove the obstacle of the protection tube entering the inner cavity of the cutting box; S6: The cutting mechanism selects a suitable saw blade or cutting knife according to the model of the protection tube; when the cutting knife is selected, the cutting knife switches to the second state; S7: Using the third servo motor to drive the driving gear to rotate, so that the clamping plate assembly and the protection tube can move along the axial direction of the protection tube into the inner cavity of the cutting box, so that the end wall of the protection tube abuts against the side wall of the clamping claw in the first circumferential clamp, thereby achieving preliminary positioning of the protection tube; S8: The clamping electric cylinder closes the second circumferential clamp and clamps the protective tube, and the clamping electric cylinder drives the first circumferential clamp to open; S9: The clamping plate assembly drives the first clamping plate and the second clamping plate to reset to the zero position under the action of the fourth servo motor, and releases the clamping of the protective tube. The third servo motor drives the clamping plate assembly to move away from the circumferential clamp by driving the gear and the rack; S10: The clamping plate assembly re-clamps the protection tube, the clamping electric cylinder opens the first circumferential clamp and the second circumferential clamp, releases the clamping of the protection tube, and the feeding device continues to feed the protection tube, and then the first circumferential clamp and the second circumferential clamp are used to re-clamp the protection tube, and the above steps S9-S10 are repeated to achieve accurate measurement of the length of the protection tube; S11: The first circumferential clamp and the second circumferential clamp clamp the protection tube, the first driving member drives the cutting assembly to rotate around the axis of the protection tube, and the second driving member drives the cutting mechanism and the counterweight mechanism to move radially inward along the protection tube synchronously to cut off the protection tube; S12: The clamp assembly re-clamps the protective tube, and then the first circumferential clamp and the second circumferential clamp are opened, and the feeding device transports the protective tube into the inner cavity of the cutting box, and the cut protective tube is pushed out of the first circumferential clamp and falls off. After the protective tube to be cut reaches the set length, the first circumferential clamp and the second circumferential clamp re-clamp the protective tube, and steps S11-S12 are repeated to achieve uninterrupted cutting of the specified length of the protective tube.

[0017] Compared with the prior art, the cable protection tube cutting machine disclosed in the present invention has the following beneficial effects: During the cutting process of the protective tube, the protective tube is placed on the feeding device, the protective tube is clamped by the clamping plate assembly, and the diameter of the protective tube is measured by the distance measuring mechanism. Then, the position of the cutting box is adjusted by the lifting assembly, so that the axes of the first circumferential clamp, the second circumferential clamp and the protective tube coincide. The clamping plate assembly is driven by the third driving member to move and feed the protective tube into the cutting box, so that the protective tube abuts against the end wall of the circumferential clamp on the side away from the feeding device. The other circumferential clamp clamps the protective tube to achieve the preliminary positioning of the protective tube. Then, the cutting knife is selected according to the material of the protective tube. or saw blade, the clamping plate assembly releases the clamping of the protective tube, and the third driving member drives the clamping plate assembly to reset, and then the protective tube is clamped again, the first circumferential clamp and the second circumferential clamp are both opened, and the protective tube continues to be transported into the cutting box, so as to accurately determine the cutting length of the protective tube. During cutting, the first circumferential clamp and the second circumferential clamp clamp the protective tube at the same time, and the first driving member drives the cutting assembly to rotate around the circumference of the protective tube, and then the second driving member is used to drive the cutting mechanism to move radially along the protective tube, so as to realize the relative movement of the cutting knife or saw blade and the protective tube, and realize the cutting of the protective tube; The solution disclosed in the present application adopts a clamping-pushing-cutting method to achieve accurate measurement of the tube diameter and tube length, replacing the manual measurement method and improving the cutting efficiency of the protective tube; at the same time, the cutting knife and saw blade in the cutting mechanism can be cut according to the material of the protective tube. The cutting machine expands the cutting range of the protective tube and saves production costs.

[0018] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0020] Figure 1 A schematic diagram of the overall structure of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 2 A schematic diagram of the internal structure of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 3 A cross-sectional view of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 4A schematic diagram of a first angle of a cutting assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 5 A second angle schematic diagram of a cutting assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 6 A schematic structural diagram of a circumferential clamp for a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 7 A front view of a circumferential clamp of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Figure 8 A schematic structural diagram of a cutting assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig. 9 A schematic structural diagram of a feeding device for a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.10 A cross-sectional view of a feeding device of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.11 A schematic diagram of a first state of a cutting mechanism of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.12 A schematic diagram of a second state of a cutting mechanism of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.13 A schematic diagram of the internal structure of a cutting box of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.14 A schematic diagram showing the deployment of a cutting mechanism of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.15 A schematic diagram of a first state of an electromagnetic assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.16 A schematic diagram of a second state of an electromagnetic assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.17 A schematic diagram of the expansion of an electromagnetic assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown; Fig.18 A schematic diagram of installing a cable protection tube cutting machine mounting base according to an embodiment of the present disclosure is shown; Fig.19 A schematic diagram of another angle of a cable protection tube cutting machine mounting base according to an embodiment of the present disclosure is shown; Fig. 20 A cable protection tube cutting machine according to an embodiment of the present disclosure is shown. Fig.15 A is an enlarged schematic diagram; Fig.21 A top view of a cable protection tube cutting machine mounting base according to an embodiment of the present disclosure is shown; Fig. 22 A cross-sectional view of a locking tongue and a locking groove of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown.

[0021] Description of the numbers in the figure: 1. cutting box; 100. frame; 1001. guide rod; 1002. frame; 1003. guide wheel; 10. Rotating plate; 101. Punching; 11. Cutting components; 111. Cutting mechanism; 1111, saw blade; 11111, positioning hole; 1112, cutting knife; 1113, driving source; 1114, spline shaft; 1115, mounting plate; 11151, limiting protrusion; 1116, spline sleeve; 11161, avoidance ring groove; 111611, guide bevel; 1117, mounting seat; 11171, connecting outer edge; 11172, limiting block; 1118, limit seat; 11181, first mounting ring groove; 11182, rotation groove; 111821, first end wall; 111822, second end wall; 1119, electromagnetic assembly; 11191, first seat body; 111911, first protective retaining ring; 11192, second seat body; 111921, second protective retaining ring; 111922, second mounting ring groove; 1119221, limiting slot; 1119222, limiting rubber column; 111923, limiting column; 11193, second spring; 11194, electromagnetic coil; 11195, armature ring; 112. Counterweight mechanism; 113. A second driving member; 1131, second servo motor; 1132, lead screw; 1133, transmission block; 114. Slide rail; 115, positioning plate; 1151, through hole; 116. Positioning seat; 12. first driving member; 121. first servo motor; 122. gear; 123. gear ring; 2. Feeding device; 21. Clamp assembly; 211, first clamping plate; 212, second clamping plate; 20, rubber pad; 201, fourth driving member; 2011, fourth servo motor; 2012, double-ended reverse screw rod; 2013, pulley assembly 22. a third driving member; 221, a third servo motor; 222, a driving gear; 223, a rack; 23. Sliding plate; 231. First linear guide rail; 232. Support roller; 24. Second linear guide rail; 25. Opposite photoelectric; 3. Circumferential fixture; 31. First circumferential fixture; 32. Second circumferential fixture; 311, positioning plate; 312, clamping claw; 313, clamping roller; 314, synchronous connecting rod; 315, driving rod; 316, clamping electric cylinder; 3111, first slot; 3112, second slot; 3121, first screw; 3122, second screw; 3123, third screw; 3124, fourth screw; 4. Lifting components; 41. Elevator; 42. Elevator screw; 5. Locking parts; 51. Mounting hole; 52. Lock tongue; 521. Guide slope; 522. Locking surface; 53. Locking groove; 531. Sliding surface; 532. Cut-off surface; 533. Limiting surface; 54. First spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0023] like Figure 1 and Figure 2 As shown, the cable protection tube cutting machine includes a cutting box 1 and a feeding device 2 for conveying the cable protection tube into the cutting box 1, wherein a cutting assembly 11 is arranged inside the cutting box 1, a circumferential clamp 3 arranged along the axial direction of the protection tube is arranged on the cutting box 1, a frame 100 is arranged on the outer side of the cutting box 1, and a lifting assembly 4 is arranged on the frame 100 for realizing the lifting and lowering of the cutting box 1.

[0024] Specifically, the circumferential clamp 3 includes a first circumferential clamp 31 and a second circumferential clamp 32 , wherein the first circumferential clamp 31 and the second circumferential clamp 32 are distributed along the axial direction of the protection tube.

[0025] When the cable protection tube is cut, after the protection tube is placed on the feeding device 2, the lifting assembly 4 is used to adjust the position of the cutting box 1 so that the axes of the first circumferential clamp 31 and the second circumferential clamp 32 coincide with the axes of the protection tube, and then the feeding device 2 is used to transport the protection tube into the inner cavity of the cutting box 1, and then the first circumferential clamp 31 and the second circumferential clamp 32 are used to clamp the protection tube, and finally the cutting assembly 11 is used to cut the clamped protection tube.

[0026] It is worth noting that, since the protective tube is relatively long before being cut, the protective tube is prone to bending. However, in the present disclosure, the cutting machine is provided with a first circumferential clamp 31 and a second circumferential clamp 32 to synchronously clamp the protective tube. Figure 3 As shown, the distance between the first circumferential clamp 31 and the second circumferential clamp 32 is the thickness of the cutting box 1. In actual equipment, the thickness of the cutting box 1 is relatively small, and the first circumferential clamp 31 and the second circumferential clamp 32 are coaxially arranged. At this time, the protective tube between the first circumferential clamp 31 and the second circumferential clamp 32 will be corrected, and then the cutting assembly 11 inside the cutting box 1 will be used to cut the protective tube, so as to ensure the flatness of the cross section.

[0027] like Figure 3 As shown, it also includes a rack 1002, wherein the rack 1002 is welded with the frame 100 and is used for installing the feeding device 2, so that the feeding device 2 is installed on the rack 1002, so that the protective tube can be conveniently clamped and transported.

[0028] Specifically, Fig. 9 and Fig.10 As shown, after the protective tube is placed on the feeding device 2, the protective tube can be clamped and fixed by the clamping plate assembly 21. In order to transport the protective tube into the inner cavity of the cutting box 1, the feeding device 2 also includes a third driving member 22 that drives the clamping plate assembly 21 to move along the axis of the protective tube.

[0029] Among them, the third driving member 22 includes two second linear guide rails 24 fixedly installed on the frame 1002, and a sliding plate 23 is slidably installed on the second linear guide rails 24, and also includes a rack 223 arranged along the axial direction of the protective tube, and a third servo motor 221 is fixedly installed on the sliding plate 23, and a driving gear 222 is fixedly installed on the output shaft of the third servo motor 221, and the driving gear 222 and the rack 223 are meshed with each other, wherein the clamping plate assembly 21 is installed on the sliding plate 23.

[0030] It is worth mentioning here that since the third servo motor 221 is used to drive the sliding plate 23 to move along the axial direction of the protective tube, the moving distance of the sliding plate 23 can be accurately controlled. When the clamping plate assembly 21 completes the clamping and fixing of the protective tube, a protective tube of precise length can be fed into the cutting box 1.

[0031] In order to clamp and fix the protection tube, in this embodiment, Fig. 9 and Fig.10 As shown, the clamping plate assembly 21 includes a first clamping plate 211, a second clamping plate 212 and a fourth driving member 201 for driving the first clamping plate 211 and the second clamping plate 212 to clamp the protective tube, wherein the first clamping plate 211 and the second clamping plate 212 are respectively located on both sides of the protective tube, and when the protective tube is placed on the frame 1002, the protective tube is located between the first clamping plate 211 and the second clamping plate 212, and then the fourth driving member 201 is used to drive the first clamping plate 211 and the second clamping plate 212 to move closer to the protective tube, thereby completing the clamping of the protective tube.

[0032] Specifically, Fig.10 As shown, the fourth driving member 201 includes a fourth servo motor 2011, a double-ended reverse screw 2012, and a transmission assembly for transmitting power from the fourth servo motor 2011 to the double-ended reverse screw 2012, wherein the first clamping plate 211 and the second clamping plate 212 are respectively threadedly connected to the threaded segments at both ends of the double-ended reverse screw 2012, wherein the threaded rotation directions of the two threaded segments are opposite, and when the fourth servo motor 2011 drives the double-ended reverse screw 2012 to rotate, the first clamping plate 211 and the second clamping plate 212 move synchronously in a direction of approaching or moving away from each other. It is worth noting that the approaching and moving away from each other here are in terms of the axial direction of the double-ended reverse screw 2012.

[0033] In order to ensure the stable movement of the first clamping plate 211 and the second clamping plate 212, in this embodiment, Fig. 9 As shown, a first linear guide rail 231 perpendicular to the protection tube is fixedly mounted on the sliding plate 23 , wherein the first clamping plate 211 and the second clamping plate 212 are both slidably connected to the first linear guide rail 231 .

[0034] In this embodiment, if Fig.10 As shown, the transmission assembly adopts a pulley assembly 2013, the input end of the pulley assembly 2013 is connected to the output shaft of the fourth servo motor 2011, and the output end of the pulley assembly 2013 is connected to the double-headed reverse screw 2012. Specifically, the pulley assembly 2013 uses a synchronous pulley so that the number of revolutions of the double-headed reverse screw 2012 can be accurately controlled, thereby facilitating the calculation of the travel distance of the first clamping plate 211 and the second clamping plate 212.

[0035] The first clamping plate 211 and the second clamping plate 212 are both provided with rubber pads 20. When the first clamping plate 211 and the second clamping plate 212 clamp the protection tube, the rubber pads 20 are in contact with the protection tube. The use of the rubber pads 20 can reduce the risk of damage to the protection tube.

[0036] It is worth noting that the fourth servo motor 2011 is also provided with a zero point for maintaining the first clamping plate 211 and the second clamping plate 212 in an initial state, wherein the initial state here refers to the position where the first clamping plate 211 and the second clamping plate 212 are away from the protective tube, or it can be said that the clamping plate assembly 21 is in an open state, referring to Fig.10 As shown, the dotted line in the figure represents the zero point position, at this time, the distance between the first clamping plate 211 and the second clamping plate 212 is a constant value D1, when the fourth servo motor 2011 drives the double-headed reverse screw 2012 to rotate, driving the first clamping plate 211 and the second clamping plate 212 to clamp the protective tube, when the first clamping plate 211 and the second clamping plate 212 touch the protective tube, the torque of the fourth servo motor 2011 increases instantaneously, indicating that the protective tube has been clamped. Here, the distance D2 traveled by the first clamping plate 211 or the second clamping plate 212 can be calculated according to the number of turns of the double-headed reverse screw 2012 and the pitch on the threaded section of the double-headed reverse screw 2012. It is worth noting here that the pitch of the threaded sections at both ends of the double-headed reverse screw 2012 is the same, which can ensure that the first clamping plate 211 and the second clamping plate 212 move synchronously, so that the diameter D3 of the protective tube can be calculated, and the diameter D3 of the protective tube here is D3=D1-2×D2.

[0037] After the clamping plate assembly 21 completes the clamping of the protection tube, in order to reduce the friction between the protection tube and the frame 1002, the third driving member 22 is used to transport the protection tube. Fig.10 As shown, a supporting roller 232 for supporting the protective tube is rotatably installed on the frame 1002, wherein the highest point of the supporting roller 232 is higher than the highest point of the double-headed reverse screw 2012. The supporting roller 232 is used to support the protective tube to prevent the protective tube from contacting the double-headed reverse screw 2012 and the frame 1002, thereby reducing the friction during the movement of the protective tube.

[0038] After the protective tube is placed on the frame 1002 and fixed by the clamp assembly 21, the axis of the protective tube is on the same vertical plane as the axes of the first circumferential clamp 31 and the second circumferential clamp 32, but the axis of the protective tube does not necessarily coincide with the axes of the first circumferential clamp 31 and the second circumferential clamp 32. When the axes of the three do not coincide, the protective tube passes into the inner cavity of the cutting box 1 and is then clamped by the first circumferential clamp 31 and the second circumferential clamp 32. At this time, the protective tube will be uneven in the axial direction, affecting the cutting of the protective tube by the cutting assembly 11.

[0039] When the clamping plate assembly 21 completes the clamping of the protection tube, the diameter of the protection tube can be detected. In order to make the axes of the first circumferential clamp 31 and the second circumferential clamp 32 coincide with the axis of the protection tube, as shown in FIG. Figure 3 As shown, the lifting assembly 4 includes a lifter 41 and a lifting screw 42, wherein the lifter 41 is fixed on the frame 100, the output end of the lifter 41 is connected to the lifting screw 42 by power, and the end of the lifting screw 42 is hinged to the top wall of the cutting box 1. The lifter 41 can determine the number of turns of the lifting screw 42 according to the diameter of the protective tube and the original height of the cutting box 1, so as to adjust the position of the cutting box 1 again, so that the axes of the first circumferential clamp 31, the second circumferential clamp 32 and the protective tube coincide. The height adjustment here can be controlled by the position sensor and the central control unit to control the lifter 41. Since this control method is a conventional method, the installation position and control mechanism of the position sensor and the central control unit will not be described in detail here.

[0040] Through the above-mentioned arrangement, when the clamping plate assembly 21 completes the clamping of the protective tube, the diameter D3 of the protective tube is calculated according to the zero point position and the travel distance of the first clamping plate 211 and the second clamping plate 212, so that the lifting screw 42 can be driven to rotate by the lifting machine 41, thereby realizing the rising or falling of the cutting box 1, so that the axis of the protective tube coincides with the axis of the first circumferential clamp 31 and the second circumferential clamp 32, which facilitates the clamping of the protective tube by the first circumferential clamp 31 and the second circumferential clamp 32.

[0041] It is worth noting that, since the lifting screw rod 42 needs to be rotated, the end of the lifting screw rod 42 can be rotatably connected to a hinge block, and then hinged to the top of the cutting box 1 by using the hinge block.

[0042] In order to achieve stable lifting of the cutting box 1 and improve the stability of the cutting box 1, in this embodiment, Figure 2 , Figure 4 and Figure 5 As shown, longitudinally arranged guide rods 1001 are fixedly provided on both sides of the frame 100, and the side walls of the cutting box 1 are rotatably provided with guide wheels 1003 located on both sides of the guide rods 1001, wherein the guide wheels 1003 are rollingly connected to the guide rods 1001; at least two groups of guide wheels 1003 on one side of the guide rod 1001 can be provided and distributed along the longitudinal direction.

[0043] In order to be able to clamp the protective tube using the first circumferential clamp 31 and the second circumferential clamp 32, wherein the structures of the first circumferential clamp 31 and the second circumferential clamp 32 are consistent, the first circumferential clamp 31 and the second circumferential clamp 32 are respectively installed on both sides of the cutting box 1, the first circumferential clamp 31 is located on the side away from the feeding device 2, and the second circumferential clamp 32 is located on the side close to the feeding device 2. The following will describe one set of structures of the first circumferential clamp 31 or the second circumferential clamp 32 in detail.

[0044] like Figure 6 and Figure 7 As shown, it includes two relatively arranged positioning disks 311, wherein the axes of the two positioning disks 311 coincide with each other, and the positioning disks 311 are fixedly mounted on the outer wall of the cutting box 1, wherein the positioning disks 311 are ring-shaped so that the protective tube can pass therethrough, and a plurality of clamping claws 312 are included between the two positioning disks 311, wherein the plurality of clamping claws 312 are rotatably connected to the positioning disks 311 through a first screw 3121, and the plurality of clamping claws 312 are evenly distributed along the circumference of the positioning disks 311. In this embodiment, the number of the clamping claws 312 is six as an example. Specifically, one end of the clamping claw 312 away from the first screw 3121 is rotatably connected to a clamping roller 313 through a fourth screw 3124, wherein the clamping roller 313 is made of polyurethane material, and when the protective tube is clamped, the peripheral wall of the clamping roller 313 contacts the outer wall of the protective tube to achieve clamping of the protective tube.

[0045] In order to adjust the state of the clamping claw 312, in this embodiment, Figure 6 and Figure 7 As shown, the end of the clamping claw 312 away from the clamping roller 313 is provided with a second screw 3122 and a third screw 3123. In the clockwise direction, the second screw 3122 on the clamping claw 312 is rotatably connected with the third screw 3123 on the next clamping claw 312 through a synchronous connecting rod 314. A driving rod 315 is provided on one of the six clamping claws 312. Figure 5 As shown, a clamping electric cylinder 316 is rotatably connected to the outer wall of the cutting box 1 , wherein the output end of the clamping electric cylinder 316 is rotatably connected to the driving pull rod 315 .

[0046] It is worth pointing out here that Figure 7 As shown, the first screw 3121 , the second screw 3122 , and the third screw 3123 are distributed in a triangle.

[0047] Through the above arrangement, when the output shaft of the clamping electric cylinder 316 extends outward, it will push the driving rod 315 to rotate around the first screw 3121 of the clamping claw 312, so that the clamping claw 312 moves toward the axis of the positioning plate 311, so that the clamping roller 313 can clamp the protective tube. When the driving rod 315 drives the clamping claw to rotate, the clamping claw 312 drives the adjacent clamping claws 312 to rotate synchronously through the synchronous connecting rod 314. As the synchronous connecting rod 314 transmits power, all the clamping claws 312 can clamp the protective tube synchronously. When the output shaft of the clamping electric cylinder 316 retracts inward, the clamping claw 312 is driven to rotate by the driving rod 315 and the synchronous connecting rod 314, so that the circular clamp 3 can be opened to release the clamping of the protective tube.

[0048] In this embodiment, if Figure 6 and Figure 7 As shown, a plurality of first slots 3111 are provided on the inner side of the positioning plate 311, specifically, six first slots 3111 are provided and correspond to the fourth screws 3124 one by one, and the first slots 3111 are located at the intersection of the inner wall of the positioning plate 311 with the first screw 3121 as the center and the distance between the first screw 3121 and the fourth screw 3124 as the radius. When the circumferential clamp 3 is opened, the fourth screw 3124 is engaged in the first slot 3111 to limit the clamping claw 31 2; a second slot 3112 corresponding to the third screw 3123 is provided on the outer side of the positioning disk 311, wherein the second slot 3112 is located at the intersection of the outer wall of the positioning disk 311 with the first screw 3121 as the center and the distance between the first screw 3121 and the third screw 3123 as the radius. When the circular clamp 3 is closed, the third screw 3123 is engaged in the second slot 3112, thereby limiting the clamping claw 312 from continuously moving toward the axis of the positioning disk 311.

[0049] When the protection tube is clamped by the clamping plate assembly 21 in the feeding device 2, the protection tube is fixed. In order to cut the protection tube, in this embodiment, Figure 8 and Fig.11 As shown, a rotating plate 10 is rotatably installed in the inner cavity of the cutting box 1, wherein the rotating plate 10 is provided with a through hole 101 for the protective tube to pass through, and after the cutting box 1 is adjusted in position by the lifting assembly 4, the axis of the through hole 101 coincides with the axis of the protective tube, wherein the cutting assembly 11 includes a cutting mechanism 111 installed on the rotating plate 10, and the rotating plate 10 is also provided with a second driving member 113 for driving the cutting mechanism 111 to move radially along the protective tube, wherein the cutting assembly 11 is also provided with a first driving member 12 for driving the rotating plate 10 to rotate around the axis of the protective tube.

[0050] Through the above arrangement, when the protective tube is clamped by the feeding device, the first driving member 12 is used to drive the rotating plate 10 and the cutting mechanism installed on the rotating plate 10 to rotate around the axis of the protective tube, and then the second driving member 113 is used to drive the cutting mechanism 111 to move toward one side of the protective tube along the radial direction of the protective tube, thereby realizing the cutting of the protective tube.

[0051] Specifically, in order to realize the rotation of the rotating plate 10, in this embodiment, as shown in FIG. Figure 8 As shown, the first driving member 12 includes a first servo motor 121, a gear 122 and a ring gear 123, wherein the ring gear 123 is fixedly mounted on the rotating plate 10, and the axis of the ring gear 123 coincides with the axis of the through hole 101, the first servo motor 121 is fixedly mounted on the outer wall of the cutting box 1, the gear 122 is fixedly mounted on the output shaft of the first servo motor 121, and the gear 122 and the ring gear 123 are meshed with each other.

[0052] Through the above arrangement, the first servo motor 121 is used to drive the gear 122 to rotate, and then the rotating plate 10 can be driven to rotate through the mutually meshing gear rings 123, so that the cutting mechanism 111 can rotate around the axis of the protection tube.

[0053] In order to make the cutting mechanism 111 move along the radial direction of the protection tube to cut off the protection tube, in this embodiment, Figure 8 and Fig.11 As shown, a slide rail 114 located on one side of the perforation 101 is fixedly provided on the rotating plate 10, and the cutting mechanism 111 is slidably installed on the slide rail 114, and also includes a counterweight mechanism 112, wherein the counterweight mechanism 112 and the cutting mechanism 111 are symmetrically arranged about the axis of the protective tube, and the second driving member 113 is simultaneously connected to the counterweight mechanism 112 and the cutting mechanism 111 for driving the counterweight mechanism 112 and the cutting mechanism 111 to move synchronously. It is worth noting that the synchronous movement here refers to the counterweight mechanism 112 and the cutting mechanism 111 moving toward the axis of the protective tube at the same time, or moving to the side away from the protective tube at the same time, and the feed speeds of the counterweight mechanism 112 and the cutting mechanism 111 are consistent to maintain the balance of the rotating plate 10.

[0054] It is worth mentioning here that if there is no counterweight mechanism 112, when the protective tube is cut, the second driving member 113 will drive the cutting mechanism 111 to move radially toward one side of the protective tube, thereby cutting the protective tube. During this process, the position of the cutting mechanism 111 on the rotating plate 10 changes. At this time, the entire cutting assembly 11 and the rotating plate 10 rotate around the axis of the protective tube under the drive of the first driving member 12. At this time, the center of gravity of the rotating plate 10 is unstable, which makes the rotating plate 10 tend to polarize, and easily causes damage to the first driving member 12. In the present disclosure, the use of the counterweight mechanism 112 solves the above-mentioned problem.

[0055] In this embodiment, if Fig.11 As shown, the second driving member 113 includes a second servo motor 1131, a screw rod 1132 and a transmission block 1133, wherein the screw rod 1132 is rotatably set on the rotating plate 10 and is parallel to the slide rail 114, the output shaft of the second servo motor 1131 is fixedly connected to the screw rod 1132, and the transmission block 1133 is provided with two groups and is threadedly connected to the screw rod 1132, wherein the screw rod 1132 is provided with two sections of reverse thread segments, and each transmission block 1133 is respectively installed on the corresponding thread segment, and then the counterweight mechanism 112 and the cutting mechanism 111 are respectively fixedly installed on the corresponding transmission block 1133.

[0056] Through the above arrangement, when the protective tube is in the process of being cut, the rotating plate 10 will rotate around the axis of the protective tube. In order to cut the protective tube, the second servo motor 1131 drives the screw rod 1132 to rotate, and then the counterweight mechanism 112 and the cutting mechanism 111 can be driven by the transmission block 1133 to move synchronously to one side of the protective tube, and then the cutting mechanism 111 is used to cut the protective tube.

[0057] Specifically, in this embodiment, Fig.11 and Fig.12 As shown, a positioning plate 115 is also included, wherein the positioning plate 115 is installed on the slide rail 114 , and the cutting mechanism 111 is installed on the positioning plate 115 .

[0058] Nowadays, cable protection tubes are made of PVC, MPP or fiberglass. Different cutting tools are required for protection tubes of different materials. Conventional cutting equipment has a single functionality and can only cut protection tubes of one material. However, this embodiment solves the problem of the single functionality of the above-mentioned cutting equipment.

[0059] In this embodiment, if Fig.14 As shown, the cutting mechanism 111 includes a saw blade 1111, a cutting knife 1112, and a driving source 1113 for driving the saw blade 1111 or the cutting knife 1112 to switch between a first state and a second state.

[0060] Among them, when cutting the protective tube of fiberglass and PVC materials, it is necessary to use the saw blade 1111 to cut the protective tube. At this time, the driving source 1113 is used to drive the saw blade 1111 to rotate at a high speed to complete the cutting of the protective tube. At this time, the cutting knife 1112 is driven by the driving source 1113 and is in the first state. In this state, the cutting knife 1112 cannot touch the protective tube, so as to prevent the cutting knife 1112 from affecting the cutting of the protective tube by the saw blade 1111; when it is necessary to cut the protective tube of MPP material, the driving source 1113 is used to switch the cutting knife 1112 from the first state to the second state, wherein, Fig.11The cutting knife 1112 in the embodiment is in the first state, Fig.12 The cutting knife 1112 is in the second state, and the cutting knife 1112 can be used to cut the protective tube.

[0061] It is worth noting here that after the cutting knife 1112 is installed, the projection of the cutting portion of the cutting knife 1112 along the output shaft of the driving source 1113 on the saw blade 1111 exceeds the saw blade 1111. Therefore, in the second state, the cutting knife 1112 can be used to cut the protective tube, wherein the portion of the cutting knife 1112 that exceeds the saw blade 1111 is the upper limit of the thickness of the protective tube cut by the cutting knife 1112.

[0062] Specifically, in this embodiment, the driving source 1113 is fixedly mounted on the positioning plate 115 via a positioning seat 116 , wherein the positioning seat 116 is U-shaped and fixedly mounted on the bottom wall of the positioning plate 115 , and the saw blade 1111 is fixedly mounted on the output shaft of the driving source 1113 .

[0063] In order to improve the stability of the saw blade 1111, in this embodiment, Fig.14 and Fig.16 As shown, a mounting disk 1115 is fixedly installed on the output shaft of the driving source 1113, and a threaded hole is provided on the mounting disk 1115. The saw blade 1111 is placed on the mounting disk 1115 to increase the contact area between the saw blade 1111 and the mounting disk 1115. Then, bolts are used to thread the threaded holes to fix the saw blade 1111 on the mounting disk 1115, thereby improving the strength of the saw blade 1111 and reducing the risk of the saw blade 1111 breaking during the cutting process of the protective tube.

[0064] Specifically, in order to prevent the saw blade 1111 and the mounting plate 1115 from rotating relative to each other, in this embodiment, Fig.14 As shown, a positioning hole 11111 is provided on the saw blade 1111, and a limiting protrusion 11151 is fixedly provided on the mounting plate 1115. When the saw blade 1111 is installed, the limiting protrusion 11151 is inserted into the positioning hole 11111, and then the saw blade 1111 is fixed by utilizing the cooperation of the bolt and the threaded hole, thereby solving the problem of relative rotation between the saw blade 1111 and the mounting plate 1115.

[0065] Since the rotation of the saw blade 1111 and the power source for switching the cutting knife 1112 from the first state to the second state are both the driving source, when the saw blade 1111 is in a high-speed rotating processing state, the cutting knife 1112 needs to be kept in the first state to reduce the interference of the cutting knife 1112 on the cutting of the protection tube. Therefore, in the first state, the output of the driving source 1113 power needs to be controlled. In this embodiment, Fig.14As shown, it also includes a spline shaft 1114, a spline sleeve 1116, a mounting seat 1117 and a locking member 5, wherein the spline shaft 1114 is fixedly mounted on the output shaft of the driving source 1113, the mounting plate 1115 is mounted on the spline shaft 1114, the spline sleeve 1116 is sleeved on the outer side of the spline shaft 1114 to form a spline connection, the mounting seat 1117 is sleeved on the outer side of the spline sleeve 1116 and is rotatably mounted on the positioning plate 115, and the locking member 5 is installed between the mounting seat 1117 and the spline sleeve 1116, so that the mounting seat 1117 and the spline sleeve 1116 can switch between a locked state and an unlocked state.

[0066] Among them, in the first state, the locking member 5 releases the locking of the mounting seat 1117 and the spline sleeve 1116, and in the second state, the locking member 5 realizes the locking of the mounting seat 1117 and the spline sleeve 1116, so that the power of the driving source 1113 can be transmitted to the mounting seat 1117, thereby realizing the switching of the state of the mounting seat 1117.

[0067] The mounting seat 1117 is provided with a plug-in hole, and the cutting knife 1112 is installed in the plug-in hole and fixed on the mounting seat 1117 .

[0068] In order to switch the mounting base 1117 between the two states, in this embodiment, as shown in FIG. Fig.16 and Fig. 20 As shown, the locking member 5 includes a mounting hole 51, a locking tongue 52 and a locking groove 53. The mounting hole 51 is arranged on the inner wall of the mounting seat 1117, and the locking groove 53 is arranged on the outer wall of the spline sleeve 1116. The locking tongue 52 is slidably installed in the mounting hole 51, and the locking tongue 52 can move along the radial direction of the spline sleeve 1116. When the mounting seat 1117 and the spline sleeve 1116 are in a locked state, the locking tongue 52 is inserted into the locking groove 53. When the mounting seat 1117 and the spline sleeve 1116 are unlocked, the locking tongue 52 is disengaged from the locking groove 53.

[0069] The locking member 5 further includes a first spring 54 , which is installed in the mounting hole 51 , one end of the first spring 54 abuts against the inner wall of the mounting hole 51 , and the other end of the first spring 54 abuts against the locking tongue 52 , so as to push the locking tongue 52 into the locking groove 53 .

[0070] It is worth mentioning here that, under normal circumstances, the mounting hole 51 can be installed on the spline sleeve 1116, the locking groove 53 is arranged on the mounting seat 1117, and the locking tongue 52 is also installed inside the mounting hole 51. However, in the first state, the driving source 1113 will drive the spline sleeve 1116 to rotate at high speed through the spline shaft 1114. Therefore, at this time, the locking tongue 52 inside the spline sleeve 1116 will extend radially into the locking groove 53 under the action of centrifugal force, thereby driving the mounting seat 1117 to rotate. When the mounting seat 1117 rotates, it will drive the cutting knife 1112 to move. During this process, the change in the position of the cutting knife 1112 will affect the cutting of the protective tube. Therefore, the mounting hole 51 and the locking tongue 52 are only installed on the mounting seat 1117.

[0071] In order to improve the stability of the mounting seat 1117 and the spline sleeve 1116 after being locked, in the present embodiment, at least two groups of locking members 5 are provided and are evenly distributed along the circumference of the spline sleeve 1116 .

[0072] Since the lock tongue 52 is pushed outward by the first spring 54 and is used to be inserted into the locking groove 53, under normal circumstances, the lock tongue 52 will abut against the outer wall of the spline sleeve 1116. During the first state, as the spline shaft 1114 drives the spline sleeve 1116 to rotate, friction is likely to occur at the contact position between the lock tongue 52 and the spline sleeve 1116, which will affect the service life of the spline sleeve 1116. If an electromagnet or other structure is installed in the mounting hole 51, at this time, although the electromagnet will attract the lock tongue 52 to remain inside the mounting hole 51, solving the problem of friction between the lock tongue 52 and the outer wall of the spline sleeve 1116, it is a technical difficulty to energize the electromagnet inside the mounting hole 51.

[0073] In this embodiment, in order to solve the problem of friction between the lock tongue 52 and the outer wall of the spline sleeve 1116, the spline sleeve 1116 is further provided with an avoidance ring groove 11161, wherein the avoidance ring groove 11161 and the locking groove 53 are distributed along the axial direction of the spline sleeve 1116. It is worth noting here that Fig. 20 and Fig. 22 As shown, the avoidance ring groove 11161 is located on the side close to the driving source 1113, and the locking groove 53 is located on the side away from the driving source 1113. In the first state, the locking tongue 52 extends into the avoidance ring groove 11161 under the action of the first spring 54. In the second state, the locking tongue 52 is inserted into the locking groove 53.

[0074] In order to enable the locking member 5 to switch between the first state and the second state, the present embodiment also includes an electromagnetic component 1119 that drives the spline sleeve 1116 to move axially along the driving source 1113. When the electromagnetic component 1119 is not energized, the lock tongue 52 is inserted into the avoidance ring groove 11161. When the electromagnetic component 1119 is energized, the lock tongue 52 is inserted into the locking groove 53.

[0075] Specifically, in this embodiment, Fig.17 As shown, the electromagnetic assembly 1119 includes a first seat body 11191, a second seat body 11192, a second spring 11193, an electromagnetic coil 11194 and an armature ring 11195, wherein Fig.15 and Fig.16 As shown, Fig.15 In the embodiment, the electromagnetic assembly 1119 is in a non-powered state. Fig.16 In the embodiment, the electromagnetic assembly 1119 is in a power-on state, specifically, the first seat body 11191 is sleeved on the outer side of the output shaft of the driving source 1113 and is fixedly mounted on the positioning seat 116, the second seat body 11192 is sleeved on the outer side of the output shaft of the driving source 1113 and is slidably connected to the first seat body 11191 along the output shaft direction of the driving source 1113, the electromagnetic coil 11194 is fixedly mounted on the first seat body 11191, the armature ring 11195 is fixedly mounted on the second seat body 11192, the second spring 11193 is sleeved on the outer side of the output shaft of the driving source 1113, one end of the second spring 11193 is fixedly connected to the first seat body 11191, and the second end of the second spring 11193 is fixedly connected to the second seat body 11192, wherein the second seat body 11192 is connected to the spline sleeve 1116 through a bearing.

[0076] Specifically, Fig.16 and Fig.17 As shown, a first protective retaining ring 111911 is provided on the first seat body 11191, and a second protective retaining ring 111921 is provided on the second seat body 11192. The first protective retaining ring 111911 and the second protective retaining ring 111921 are slidably connected and sleeved on the outer side of the output shaft of the driving source 1113, wherein the second spring 11193 is sleeved on the outer sides of the first protective retaining ring 111911 and the second protective retaining ring 111921, and the first protective retaining ring 111911 and the second protective retaining ring 111921 are utilized to prevent the second spring 11193 from contacting the output shaft of the driving source 1113.

[0077] Specifically, a second mounting ring groove 111922 extending upward is fixedly provided on the second seat body 11192, wherein a bearing is installed in the second mounting ring groove 111922, and the inner ring of the bearing is interference fit with the outer wall of the spline sleeve 1116, and the outer ring of the bearing is interference fit with the inner wall of the second mounting ring groove 111922.

[0078] In order to facilitate the installation of the bearing in the second mounting ring groove 111922, as shown in FIG. Fig.17 As shown, the inner wall of the second mounting ring groove 111922 is provided with a plurality of limit slots 1119221, wherein a limit rubber column 1119222 is installed in the limit slot 1119221, wherein the limit rubber column 1119222 is interference fit with the outer wall of the bearing outer ring.

[0079] In order to realize the installation of the mounting seat 1117, in this embodiment, as shown in FIG. Fig.18 and Fig. 20 As shown, it includes a limit seat 1118, wherein the limit seat 1118 is fixedly mounted on the positioning plate 115 by bolts, the limit seat 1118 is provided with a first mounting ring groove 11181, and the mounting seat 1117 is provided with a connecting outer edge 11171 inserted into the first mounting ring groove 11181, wherein the inner wall of the first mounting ring groove 11181 is connected to the connecting outer edge 11171 through a bearing.

[0080] The limiting seat 1118 is provided with a rotation groove 11182, wherein the rotation groove 11182 is coaxial with the first mounting ring groove 11181. Fig.18 and Fig.21 As shown, a limit block 11172 is fixedly provided on the mounting seat 1117 and inserted into the rotating groove 11182, wherein the rotating groove 11182 is provided with a first end wall 111821 and a second end wall 111822, and when the cutting knife 1112 is in the first state, the side wall of the limit block 11172 abuts against the first end wall 111821, and when the cutting knife 1112 is in the second state, the side wall of the limit block 11172 abuts against the second end wall 111822.

[0081] It is worth noting that in the first state, the cutting portion of the cutting knife 1112 is away from the protective tube and does not contact the peripheral wall of the protective tube. In the second state, the cutting portion of the cutting knife 1112 abuts against the outer wall of the protective tube to achieve cutting of the protective tube. In the second state, Fig.12 As shown, the cutting knife 1112 forms an angle α with the first direction, where the first direction refers to the direction of the line connecting the center of the saw blade 1111 and the axis of the perforation 101. When the cutting knife 1112 switches from the first state to the second state, the angle of rotation of the cutting knife 1112 is greater than ninety degrees, where the angle α is between 1°-5°. In the present embodiment, the angle is 3°.

[0082] like Fig.12 As shown in this figure, the rotating plate 10 rotates in a counterclockwise direction, and the dotted line in the perforation 101 represents the protective tube. At this time, the cutting portion of the cutting knife 1112 abuts against the peripheral wall of the protective tube. Since the cutting portion of the cutting knife 1112 does not directly point to the axis of the protective tube, when the rotating plate 10 rotates, the protective tube will apply a vertical force F to the cutting portion of the cutting knife 1112. Here, the force F will cause the cutting knife 1112 to continue to rotate in the opposite direction around the output shaft of the driving source. Since the limit block 11172 abuts against the second end wall 111822, the movement of the cutting knife 1112 is limited, thereby ensuring the stability of the cutting knife 1112 during the cutting process.

[0083] If the cutting part of the cutting knife 1112 is directly directed toward the axis of the protective tube, the tip of the cutting knife 1112 will be tangent to the peripheral wall of the protective tube. As the protective tube is cut, the cutting knife 1112 will easily shake, thereby affecting the roughness of the cross-section of the protective tube after cutting, resulting in burrs and uneven cross-section.

[0084] When the cutting knife 1112 is in the first state, the saw blade 1111 cuts the protection tube. As the rotating plate 10 rotates, the cutting knife 1112 is at risk of returning to the second state. Fig.17 and Fig.21 As shown, a through hole 1151 is provided on the positioning plate 115, wherein a limiting column 111923 extending upward through the through hole 1151 is fixedly provided on the second seat body 11192. In the first state, the electromagnetic assembly 1119 is not energized, and the limiting column 111923 abuts against the outer wall of the mounting seat 1117 to limit the mounting seat 1117 from switching from the first state to the second state. When the electromagnetic assembly 1119 is energized, the electromagnetic coil 11194 attracts the armature ring 11195 to move downward and presses the second spring 11193. Compression, at this time, the limit column 111923 moves downward with the second seat body 11192, and the limit column 111923 releases the limit on the mounting seat 1117. Here, the locking tongue 52 and the locking groove 53 are located in the same plane, and the driving source 1113 drives the spline sleeve 1116 to rotate through the spline shaft 1114. As the spline sleeve 1116 rotates, the locking tongue 52 will be inserted into the locking groove 53, and then the mounting seat 1117 is driven to rotate through the locking tongue 52, thereby switching the cutting knife 1112 from the first state to the second state.

[0085] It is worth noting that in order to enable the lock tongue 52 inserted into the avoidance ring groove 11161 to switch to the locking groove 53, as shown in FIG. Fig. 22 As shown, the locking end of the lock tongue 52 is in the shape of a right-angled trapezoid, a locking surface 522 is provided on the side of the lock tongue 52 close to the locking groove 53, and a guide inclined surface 521 is provided on the side of the lock tongue 52 close to the driving source 1113, wherein the avoidance ring groove 11161 is formed by being recessed radially inwardly of the spline sleeve 1116, and the interface of the avoidance ring groove 11161 is in the shape of an isosceles trapezoid, wherein the avoidance ring groove 11161 is provided with a guide inclined surface 111611 on the side close to the locking groove 53 The cross section of the locking groove 53 is a right-angled trapezoid, and a cut-off surface 532 corresponding to the locking surface 522 is provided in the locking groove 53, and also includes a sliding surface 531 corresponding to the guide inclined surface 521, wherein a limiting surface 533 abutting against the side wall of the locking tongue 52 is also provided in the locking groove 53. When the locking tongue 52 is inserted into the locking groove 53, the side wall of the locking tongue 52 abuts against the limiting surface 533 of the locking groove 53, thereby enabling the mounting seat 1117 and the spline sleeve 1116 to rotate synchronously.

[0086] Through the above arrangement, in the initial state, the lock tongue 52 is located in the avoidance ring groove 11161, the electromagnetic coil 11194 is energized, and the spline sleeve 1116 slides toward the side of the driving source 1113. At this time, the lock tongue 52 abuts against the guide inclined surface 111611, and then the lock tongue 52 is pushed into the mounting hole 51 and the first spring 54 is compressed. Thereafter, the second seat body 11192 moves closer to the first seat body 11191, and the lock tongue 52 and the locking groove 53 are locked. On the same plane as the locking groove 53, as the driving source 1113 drives the spline sleeve 1116 to rotate, the locking tongue 52 is inserted into the locking groove 53, thereby realizing the switching of the status of the mounting seat 1117 and the spline sleeve 1116. It is worth noting here that when the locking tongue 52 is inserted into the locking groove 53, the locking surface 522 of the locking tongue will abut against the cut-off surface 532, thereby restricting the spline sleeve 1116 from continuing to move toward the side of the driving source 1113.

[0087] When the electromagnetic coil 11194 is powered off, the second spring 11193 pushes the spline sleeve 1116 to move toward the saw blade 1111. Since the guide bevel 521 abuts against the sliding surface 531, the spline sleeve 1116 moves to push the lock tongue 52 into the mounting hole 51 and squeeze the first spring 54. When the lock tongue 52 and the avoidance ring groove 11161 are on the same surface, the lock tongue 52 is inserted into the avoidance ring groove 11161.

[0088] The above-mentioned design can solve the problem of mutual friction between the locking tongue 52 and the spline sleeve 1116. At the same time, the movement of the second seat body 11192 in the electromagnetic assembly 1119 can be used to drive the switching of the position of the limiting column 111923, so as to further limit the mounting seat 1117, prevent the rotation of the rotating plate 10, and switch the mounting seat 1117 from the first state to the second state.

[0089] It is worth pointing out here that Fig. 9 As shown, the clamping plate assembly 21 is also equipped with a photoelectric device 25 for detecting the protective tube, wherein the transmitter of the photoelectric device 25 is installed on one side of the first clamping plate 211, and the receiver of the photoelectric device 25 is installed on one side of the second clamping plate 212. When there is no protective tube between the first clamping plate 211 and the second clamping plate 212, the cutting machine will sound an alarm to allow the operator to reload the material so that the protective tube can be cut again.

[0090] During the operation of a conventional protective tube cutting machine, an operator is required to manually measure the length of the protective tube to be cut, make a cutting mark on the protective tube, and then use a cutting tool to cut along the cutting mark, resulting in low cutting efficiency.

[0091] The cutting machine disclosed in this embodiment has the ability to measure the length of the protective tube. When a conventional protective tube is initially cut, due to various factors, for example, after the protective tube is placed on the cutting machine, the distance between the end of the protective tube and the cutting tool cannot be measured. Usually, the cutting tool is used to cut off a part of the end of the protective tube (the cut end is discarded as waste), and then the feeding device on the cutting machine is used to feed the protective tube to the cutting tool position. The length of the protective tube to be cut can then be measured based on the length delivered by the feeding device. This cutting method will result in the problem of waste of material at the end.

[0092] The cutting device in this embodiment can measure the length of the end portion of the protective tube that is initially cut, thereby improving the use efficiency of the protective tube.

[0093] The cutting method of the protective tube is as follows: Figures 1 to 13 As shown, the cutting steps of the protective tube are as follows: In the initial state, the clamp assembly 21 is in the zero position (open) to facilitate the insertion of the protective tube. Since the saw blade 1111 and the cutting knife 1112 are installed on the driving source 1113, and the positions of the saw blade 1111 and the cutting knife 1112 are fixed, the distance L1 between the saw blade 1111 and the side wall of the first circular clamp 31, and the distance L2 between the cutting knife 1112 and the side wall of the first circular clamp 31 are at a constant value.

[0094] S1: Place the protective tube between the clamping plate assemblies 21 of the frame 1002; S2: the through-photoelectric device 25 detects the protective tube placed between the clamping plate assemblies 21, and uses the fourth driving member 201 to drive the first clamping plate 211 and the second clamping plate 212 to move closer to the protective tube, thereby clamping the protective tube; S3: According to the number of revolutions of the double-ended reverse screw 2012 in the fourth driving member 201 and the size of the pitch in the threaded segment, the distance 2×D2 moved by the first clamping plate 211 and the second clamping plate 212 is calculated; since the distance D1 between the first clamping plate 211 and the second clamping plate 212 is a constant value when they are at the zero position, the diameter D3 of the protective tube can be calculated as D1-2×D2; S4: According to the material of the protection tube in S1, a suitable sawing tool blade 1111 or a cutting knife 1112 is selected by using the driving source 1113, and then the cutting mechanism 111 is moved away from the perforation 101 by using the second driving member 113 to reduce interference in the process of feeding the protection tube into the inner cavity of the cutting box 1; S5: according to the diameter D3 of the protection tube calculated in S3, the cutting box 1 is driven by the lifting assembly 4 to adjust up and down, so that the axis of the first circumferential fixture 31 and the second circumferential fixture 32 and the axis of the protection tube coincide with each other; S6: The clamping electric cylinder 316 on the first circumferential clamp 31 drives the first circumferential clamp 31 to close, and the clamping electric cylinder 316 on the second circumferential clamp 32 drives the second circumferential clamp 32 to open; S7: Based on S6, the clamping plate assembly 21 and the protection tube are transported into the inner cavity of the cutting box 1 by the third driving member 22, and then the end wall of the protection tube is abutted against the end wall of the first circumferential clamp 31. At this time, the end wall of the protection tube exceeds the saw blade 1111 by a length L1, and the end wall of the protection tube exceeds the cutting knife by a length L2; S8: The clamping electric cylinder 316 in the second circumferential clamp 32 enables the clamping roller 313 of the second circumferential clamp 32 to clamp the protective tube, and the clamping electric cylinder 316 in the first circumferential clamp 31 enables the first circumferential clamp 31 to open so that the subsequent protective tube can pass through. S9: using the fourth driving member 201 to reset the first clamping plate 211 and the second clamping plate 212 in the clamping plate assembly 21 to the zero position, releasing the clamping of the protection tube, and then using the third driving member 22 to drive the clamping plate assembly 21 to move away from the circumferential clamp 3; S10: on the basis of S9, the clamping plate assembly 21 clamps the protection tube again, and then the second circumferential clamp 32 releases the clamping of the protection tube; S11: Using the third driving member 22 to drive the clamping plate assembly 21 to continue to transport the protective tube into the inner cavity of the cutting box 1, and then using the first circumferential clamp 31 and the second circumferential clamp 32 to clamp the protective tube at the same time; repeating the above steps S9-S11 until the length of the first section of the protective tube to be cut is reached; S12: The first circumferential clamp 31 and the second circumferential clamp 32 clamp the protective tube, and the first driving member 12 drives the rotating plate 10 to rotate, thereby driving the cutting mechanism 111 to rotate around the axis of the protective tube, and then the second driving member 113 drives the cutting mechanism 111 and the counterweight mechanism 112 to move synchronously to one side of the protective tube, so as to cut the protective tube; S13: After the protection tube is cut, the second driving member 113 drives the cutting mechanism 111 and the counterweight mechanism 112 to move away from the protection tube, and then the clamping plate assembly 21 is used to clamp the protection tube, and the first circumferential clamp 31 and the second circumferential clamp 32 release the clamping of the protection tube; S14: The third driving member 22 is used to drive the protective tube to move into the inner cavity of the cutting box 1. At this time, the cut protective tube is pushed out of the first circumferential clamp 31, and the length of the next section of the protective tube to be cut is re-determined according to steps S9-S11, and then the protective tube is cut again according to steps S12-S13; S15: When the photoelectric transmission device 25 detects that there is no protective tube between the clamping plate components 21, the cutting machine will sound an alarm to remind the operator to load the material in time.

[0095] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document is not limited here.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A cable protection tube cutting machine, It is characterized in that include, Cutting box; A cutting assembly and a first driving member, wherein the cutting assembly is rotatably mounted in the cutting box and is located on the peripheral side of the protection tube, and the first driving member is used to drive the cutting assembly to rotate around the peripheral direction of the protection tube; The cutting assembly comprises a cutting mechanism and a second driving member, wherein the cutting mechanism is mounted on the first driving member, and the second driving member is used to drive the cutting mechanism to move radially along the protective tube; The cutting mechanism includes a saw blade, a cutting knife, and a driving source for driving the saw blade to rotate or driving the cutting knife to switch between a first state and a second state; The feeding device includes a clamping plate assembly and a third driving member for driving the clamping plate assembly to move along the axial direction of the protection tube. The clamping plate assembly is used to clamp the protection tube and feed it into the cutting box. The clamping plate assembly is provided with a distance measuring mechanism for measuring the diameter of the protection tube. The circumferential clamp comprises a first circumferential clamp and a second circumferential clamp installed on both sides of the cutting box, and the first circumferential clamp and the second circumferential clamp are arranged along the axial direction of the protection tube; A lifting assembly is fixedly mounted on a frame outside the cutting box, and a lifting end of the lifting assembly is connected to the cutting box to adjust the first circumferential fixture, the second circumferential fixture, and the protective tube axis to coincide with each other; During initial positioning, the end wall of the protection tube abuts against the end wall of the circumferential fixture away from the feeding device.

2. The cable protection tube cutting machine according to claim 1, It is characterized in that The cutting mechanism also includes, A spline shaft, the spline shaft is fixedly connected to the output shaft of the driving source, and the saw blade is fixed on the end wall of the spline shaft away from the driving source; A spline sleeve, which is sleeved on the spline shaft to form a spline connection; A mounting seat, the mounting seat sleeve is arranged outside the spline sleeve and is rotatably connected to the spline sleeve, and the cutting knife is fixedly mounted on the mounting seat; A locking member is installed between the mounting seat and the spline sleeve to realize switching between a locked state and an unlocked state of the mounting seat and the spline sleeve.

3. The cable protection tube cutting machine according to claim 2, It is characterized in that The locking parts include: A mounting hole, the mounting hole being arranged on the inner wall of the mounting seat; A lock tongue, wherein the lock tongue is slidably mounted in the mounting hole; A locking groove, a plurality of which are provided and located on the peripheral wall of the spline sleeve; A first spring, the first spring is installed in the installation hole, one end of the first spring abuts against the inner wall of the installation hole, and the other end of the first spring abuts against the end wall of the lock tongue; In the locked state, the lock tongue is inserted into the locking groove, and in the unlocked state, the lock tongue is separated from the locking groove.

4. The cable protection tube cutting machine according to claim 3, It is characterized in that The mounting seat is provided with a plug hole, and when the cutting knife is installed in the plug hole, the projection of the cutting part of the cutting knife on the saw blade along the axial direction of the output shaft of the driving source is located outside the saw blade; In the first state, the cutting knife is arranged away from the protection tube. In the second state, the cutting knife abuts against the protection tube and forms an angle α with the first direction. The first direction is the direction of the line connecting the center of the saw blade and the axis of the protection tube.

5. The cable protection tube cutting machine according to claim 4, It is characterized in that The cutting mechanism also includes a positioning plate; The positioning plate is connected to the second driving member; The limit seat is fixedly mounted on the positioning plate, and the limit seat is rotatably connected with the mounting seat through a bearing; A rotation groove coaxial with the mounting seat is recessed on the limit seat, and a first end wall and a second end wall are provided in the rotation groove. A limit block inserted into the rotation groove is fixedly provided on the mounting seat. In the first state, the side wall of the limit block abuts against the first end wall, and in the second state, the side wall of the limit block abuts against the second end wall.

6. The cable protection tube cutting machine according to claim 3 or 5, It is characterized in that The cutting mechanism also includes an avoidance ring groove arranged on the peripheral wall of the spline sleeve, and the avoidance ring groove and the locking groove are distributed along the axial direction of the spline sleeve; The electromagnetic component is sleeved on the outer side of the output shaft of the driving source to realize the axial movement of the spline sleeve along the output shaft of the driving source. In the first state, the electromagnetic component is powered off and the lock tongue is inserted into the avoidance ring groove. In the second state, the electromagnetic component is powered on and the lock tongue is inserted into the locking groove.

7. The cable protection tube cutting machine according to claim 6, It is characterized in that The electromagnetic components include, The first seat body is fixedly mounted on the positioning plate, and an electromagnetic coil is fixedly mounted on the first seat body; A second seat body, the second seat body is slidably connected to the first seat body along the axial direction of the output shaft of the driving source, the second seat body is connected to the spline sleeve through a bearing, and an armature ring adapted to the electromagnetic coil is fixed on the second seat body; A second spring, the second spring is arranged between the first seat body and the second seat body, one end of the second spring is connected to the first seat body, and the other end of the second spring is connected to the second seat body; A limiting column, which is fixedly mounted on the second seat body, passes through the positioning plate and extends vertically upward; In the first state, the peripheral wall of the limiting column abuts against the outer wall of the mounting seat to limit the mounting seat from switching to the second state. In the second state, the limiting column releases the abutment against the outer wall of the mounting seat.

8. The cable protection tube cutting machine according to claim 1, It is characterized in that The circumferential fixture includes a positioning plate, The positioning disc is fixedly mounted on the cutting box, and a plurality of clamping claws evenly distributed along the circumference of the positioning disc are rotatably connected to the positioning disc through a first screw, and a clamping roller is rotatably connected to one end of the clamping claw close to the axis of the positioning disc, and a second screw and a third screw are arranged at one end of the clamping claw away from the axis of the positioning disc, and the second screw and the third screw on two adjacent clamping claws are rotatably connected through a synchronous connecting rod; One of the clamping claws is provided with a driving rod extending to the outside of the positioning plate, and the cutting box is rotatably connected with a clamping electric cylinder, and the output end of the clamping electric cylinder is rotatably connected with the driving rod.

9. The cable protection tube cutting machine according to claim 1, It is characterized in that The clamping plate assembly includes a first clamping plate and a second clamping plate located on both sides of the protection tube, and a fourth driving member driving the first clamping plate and the second clamping plate to move; The fourth driving member includes a double-ended reverse screw and a fourth servo motor driving the double-ended reverse screw to rotate, the first clamping plate and the second clamping plate are both threadedly connected to the double-ended reverse screw, and a zero point for resetting the first clamping plate and the second clamping plate to an original state is arranged inside the fourth servo motor; The third driving member includes a rack, a driving gear and a third servo motor, the rack is arranged on the frame along the axial direction of the protection tube, the output shaft of the third servo motor is fixedly connected to the driving gear, the driving gear and the rack are meshed with each other, and the third servo motor is fixedly mounted on the clamping plate assembly; The first circumferential clamp is located at a side far away from the feeding device, and the second circumferential clamp is located at a side close to the feeding device.

10. A method for cutting a cable protection tube, using the cable protection tube cutting machine according to any one of claims 1 to 9, Features: The cutting method including the cable protection tube is as follows: S1: placing the protective tube on the frame between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are at zero position, and the distance between the first clamping plate and the second clamping plate is D1; S2: The fourth servo motor drives the double-headed reverse screw to rotate, so that the first clamping plate and the second clamping plate move toward the protection tube synchronously. When the torque of the fourth servo motor increases instantaneously, the fourth servo motor stops running to achieve the clamping of the protection tube; S3: According to the number of revolutions of the fourth servo motor, the distance D2 traveled by the first clamping plate and the second clamping plate is calculated, and the diameter of the protection tube D3=D1-2×D2 is calculated; S4: Using the lifting assembly to adjust the position of the cutting box so that the axes of the first circumferential fixture and the second circumferential fixture are coaxial with the axis of the protection tube; S5: Using the clamping electric cylinder to close the first circumferential clamp, opening the second circumferential clamp, and using the second driving member to drive the cutting mechanism to move radially outward along the protection tube to remove the obstacle of the protection tube entering the inner cavity of the cutting box; S6: The cutting mechanism selects a suitable saw blade or cutting knife according to the model of the protection tube; when the cutting knife is selected, the cutting knife switches to the second state; S7: Using the third servo motor to drive the driving gear to rotate, so that the clamping plate assembly and the protection tube can move along the axial direction of the protection tube into the inner cavity of the cutting box, so that the end wall of the protection tube abuts against the side wall of the clamping claw in the first circumferential clamp, thereby achieving preliminary positioning of the protection tube; S8: The clamping electric cylinder closes the second circumferential clamp and clamps the protective tube, and the clamping electric cylinder drives the first circumferential clamp to open; S9: The clamping plate assembly drives the first clamping plate and the second clamping plate to reset to the zero position under the action of the fourth servo motor, and releases the clamping of the protective tube. The third servo motor drives the clamping plate assembly to move away from the circumferential clamp by driving the gear and the rack; S10: The clamping plate assembly re-clamps the protection tube, the clamping electric cylinder opens the first circumferential clamp and the second circumferential clamp, releases the clamping of the protection tube, and the feeding device continues to feed the protection tube, and then the first circumferential clamp and the second circumferential clamp are used to re-clamp the protection tube, and the above steps S9-S10 are repeated to achieve accurate measurement of the length of the protection tube; S11: The first circumferential clamp and the second circumferential clamp clamp the protection tube, the first driving member drives the cutting assembly to rotate around the axis of the protection tube, and the second driving member drives the cutting mechanism to move radially inward along the protection tube to cut off the protection tube; S12: The clamp assembly re-clamps the protective tube, and then the first circumferential clamp and the second circumferential clamp are opened, and the feeding device transports the protective tube into the inner cavity of the cutting box, and the cut protective tube is pushed out of the first circumferential clamp and falls off. After the protective tube to be cut reaches the set length, the first circumferential clamp and the second circumferential clamp re-clamp the protective tube, and steps S11-S12 are repeated to achieve uninterrupted cutting of the specified length of the protective tube.

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