Cable protection tube cutting machine and cutting method

Abstract

The present disclosure provides a cable protection tube cutting machine and a cutting method, comprising a cutting assembly, a first driving member for driving the cutting assembly to rotate circumferentially around the protective tube, a feeding device for conveying the protective tube to the interior of a cutting box, the cutting box comprising a first circumferential clamp and a second circumferential clamp for clamping the protective tube, and a lifting assembly for adjusting the position of the cutting box so that the first circumferential clamp, the second circumferential clamp and the axis of the protective tube coincide. The solution disclosed in the present application adopts a one-clamp-one-push-one-cutting method to achieve accurate measurement of the tube diameter and tube length, replacing manual measurement 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 present cutting machine expands the cutting range of the protective tube and saves production costs.

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 power line magnetic field interference.

[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 MPP and softer material protection tubes, they need to be cut with unpowered tools, and for PVC and fiberglass protection tubes, they need to be sawed with powered rolling cutters. Under normal circumstances, when cable protection tubes are sawed manually or with auxiliary machines, the length of the cable needs to be measured. Different materials of protection tubes also require different equipment for cutting. 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;

[0007] A cutting assembly and a first driving member, wherein the cutting assembly is rotatably mounted in the cutting box and is located around the protective tube, and the first driving member is used to drive the cutting assembly to rotate around the protective tube;

[0008] The cutting assembly includes a cutting mechanism and a second driving member. 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.

[0009] 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;

[0010] The feeding device includes a clamping plate assembly and a third driving member that drives the clamping plate assembly to move axially along the protective tube. The clamping plate assembly is used to clamp the protective 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 protective tube.

[0011] The circumferential clamp comprises a first circumferential clamp and a second circumferential clamp installed on both sides of the cutting box, wherein the first circumferential clamp and the second circumferential clamp are arranged along the axial direction of the protective tube;

[0012] 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;

[0013] During initial positioning, the end wall of the protection tube abuts against the end wall of the circumferential fixture away from the feeding device.

[0014] In one embodiment, the cutting assembly further comprises:

[0015] A rotating plate is rotatably mounted in the inner cavity of the cutting box, and is provided with a through hole for the protective tube to pass through. A first driving member is connected to the rotating plate to drive the rotating plate to rotate around the axis of the protective tube;

[0016] The slide rail is fixedly mounted on one side of the perforation of the rotating plate;

[0017] The counterweight mechanism and the cutting mechanism are all slidably connected to the slide rail, and the counterweight mechanism and the cutting mechanism are symmetrically arranged relative to the axis of the perforation;

[0018] 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 move synchronously toward or away from the axis of the protection tube.

[0019] In one embodiment, the cutting mechanism further comprises:

[0020] A spline shaft, the spline shaft is fixedly connected to the output shaft of the driving source, and the saw blade is fixed to the end wall of the spline shaft on the side away from the driving source;

[0021] A spline sleeve, which is sleeved on the spline shaft to form a spline connection;

[0022] A mounting seat, the mounting seat is arranged on the outside of the spline sleeve and is rotatably connected to the spline sleeve, and the cutting knife is fixedly installed on the mounting seat;

[0023] The locking piece is installed between the mounting seat and the spline sleeve to realize the switching of the mounting seat and the spline sleeve between the locked state and the unlocked state.

[0024] In one embodiment, the locking member includes:

[0025] A mounting hole, the mounting hole being arranged on the inner wall of the mounting seat;

[0026] A lock tongue is slidably mounted in the mounting hole;

[0027] Locking grooves, a plurality of which are provided and located on the peripheral wall of the spline sleeve;

[0028] a first spring, the first spring being installed in the mounting hole, one end of the first spring being in contact with the inner wall of the mounting hole, and the other end of the first spring being in contact with the end wall of the lock tongue;

[0029] In the locked state, the lock tongue is inserted into the locking groove, and in the unlocked state, the lock tongue is disengaged from the locking groove.

[0030] In one embodiment, the mounting seat is provided with an inserting hole, and when the cutting knife is installed in the inserting 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;

[0031] In the first state, the cutting blade is set away from the protection tube. In the second state, the cutting blade abuts 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.

[0032] In one embodiment, the cutting mechanism further includes a positioning plate;

[0033] The positioning plate is slidably connected to the slide rail via a slider;

[0034] The limit seat is fixedly mounted on the positioning plate and is rotatably connected to the mounting seat through a bearing;

[0035] 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 is fixedly provided on the mounting seat and inserted into the rotation groove. 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.

[0036] In one embodiment, the cutting mechanism further comprises an avoidance ring groove provided on the peripheral wall of the spline sleeve, wherein the avoidance ring groove and the locking groove are distributed along the axial direction of the spline sleeve;

[0037] The electromagnetic component is sleeved on the outside 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.

[0038] In one embodiment, the electromagnetic assembly includes,

[0039] The first base body is fixedly mounted on the positioning plate, and an electromagnetic coil is fixedly mounted on the first base body;

[0040] A second seat body is connected to the first seat body in an axially sliding manner along 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;

[0041] A second spring is provided between the first base and the second base, one end of the second spring is connected to the first base, and the other end of the second spring is connected to the second base;

[0042] A limiting column, which is fixedly mounted on the second base body, passes through the positioning plate and extends vertically upward;

[0043] 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.

[0044] In one embodiment, the circumferential fixture comprises a positioning plate,

[0045] The positioning disc is fixedly mounted on the cutting box. The positioning disc is rotatably connected to a plurality of clamping claws evenly distributed along the circumference of the positioning disc via a first screw. The clamping claws are rotatably connected to a clamping roller at one end close to the axis of the positioning disc. The clamping claws are provided with a second screw and a third screw at one end away from the axis of the positioning disc. The second screw and the third screw on two adjacent clamping claws are rotatably connected via a synchronous connecting rod.

[0046] One of the clamping claws is provided with a driving rod extending to the outside of the positioning plate. The cutting box is rotatably connected to a clamping electric cylinder, and the output end of the clamping electric cylinder is rotatably connected to the driving rod.

[0047] 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 for driving the first clamping plate and the second clamping plate to move;

[0048] The fourth driving member includes a double-ended reverse screw and a fourth servo motor for 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 the fourth servo motor is internally provided with a zero point for resetting the first clamping plate and the second clamping plate to their original state;

[0049] 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 protective 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. The third servo motor is fixedly mounted on the clamping plate assembly.

[0050] The first circumferential clamp is located at a side away from the feeding device, and the second circumferential clamp is located at a side close to the feeding device.

[0051] 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;

[0052] The cable protection tube is cut as follows:

[0053] S1: placing the protective tube on the rack 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;

[0054] S2: The fourth servo motor drives the double-ended reverse screw to rotate, so that the first clamping plate and the second clamping plate move synchronously toward the protective tube. When the torque of the fourth servo motor increases instantaneously, the fourth servo motor stops running, thereby clamping the protective tube;

[0055] S3: Calculate the distance D2 traveled by the first and second clamping plates according to the number of revolutions of the fourth servo motor, and calculate the diameter of the protective tube D3 = D1 - 2 × D2;

[0056] S4: Using the lifting assembly to adjust the position of the cutting box so that the axes of the first circumferential clamp and the second circumferential clamp are coaxial with the axis of the protective tube;

[0057] 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 protective tube to remove the obstacle of the protective tube entering the inner cavity of the cutting box;

[0058] S6: The cutting mechanism selects a suitable saw blade or cutting knife according to the model of the protective tube; when the cutting knife is selected, the cutting knife switches to the second state;

[0059] S7: Using the third servo motor to drive the drive gear to rotate, thereby enabling the clamping plate assembly and the protective tube to move along the axial direction of the protective tube into the inner cavity of the cutting box, so that the end wall of the protective tube abuts against the side wall of the clamping claw in the first circumferential clamp, thereby achieving preliminary positioning of the protective tube;

[0060] 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;

[0061] 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, loosening the clamping of the protective tube, and the third servo motor drives the clamping plate assembly to move away from the circumferential clamp by driving the gear and the rack;

[0062] S10: The clamping plate assembly re-clamps the protective tube, the clamping electric cylinder opens the first circumferential clamp and the second circumferential clamp, releases the clamping of the protective tube, and the feeding device continues to feed the protective tube. Then, the first circumferential clamp and the second circumferential clamp are used to re-clamp the protective tube, and the above steps S9-S10 are repeated to achieve accurate measurement of the length of the protective tube;

[0063] S11: The first circumferential clamp and the second circumferential clamp clamp the protective tube, the first driving member drives the cutting assembly to rotate around the axis of the protective tube, and the second driving member drives the cutting mechanism and the counterweight mechanism to move radially inward along the protective tube to cut the protective tube;

[0064] S12: The clamp assembly re-clamps the protective tube, and then the first circumferential clamp and the second circumferential clamp are opened. The feeding device transports the protective tube into the inner cavity of the cutting box. 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.

[0065] Compared with the prior art, the cable protection tube cutting machine disclosed in the present invention has the following beneficial effects:

[0066] 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 is continued to be conveyed 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 uses the second driving member to drive the cutting mechanism to move along the radial direction of the protective tube, thereby realizing the relative movement of the cutting knife or saw blade and the protective tube, and realizing the cutting of the protective tube;

[0067] The solution disclosed in the present application adopts a clamping, pushing and cutting method to achieve accurate measurement of the pipe diameter and pipe length, replacing the manual measurement method and improving the cutting efficiency of the protective pipe; at the same time, the cutting knife and saw blade in the cutting mechanism can be cut according to the material of the protective pipe. The cutting machine expands the cutting range of the protective pipe and saves production costs.

[0068] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] 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 which several embodiments of the present disclosure are shown by way of example and not limitation, wherein:

[0070] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0071] Figure 1 The figure shows the overall structure of a cable protection tube cutting machine according to an embodiment of the present disclosure;

[0072] 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;

[0073] Figure 3 A cross-sectional view of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown;

[0074] Figure 4 A schematic diagram of a cutting assembly of a cable protection tube cutter according to an embodiment of the present disclosure at a first angle is shown;

[0075] Figure 5 A schematic diagram of a cutting assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure from a second angle is shown;

[0076] 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;

[0077] 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;

[0078] 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;

[0079] Figure 9 A schematic structural diagram of a feeding device of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown;

[0080] Figure 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;

[0081] Figure 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;

[0082] Figure 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;

[0083] Figure 13A 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;

[0084] Figure 14 A schematic diagram of the expansion of a cutting mechanism of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown;

[0085] Figure 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;

[0086] Figure 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;

[0087] Figure 17 A schematic diagram of an expanded electromagnetic assembly of a cable protection tube cutting machine according to an embodiment of the present disclosure is shown;

[0088] Figure 18 A schematic diagram of the installation of a cable protection tube cutting machine mounting base according to an embodiment of the present disclosure is shown;

[0089] Figure 19 A schematic diagram of a cable protection tube cutting machine mounting base according to an embodiment of the present disclosure is shown from another angle;

[0090] Figure 20 A cable protection tube cutting machine according to an embodiment of the present disclosure is shown. Figure 15 A is an enlarged schematic diagram;

[0091] Figure 21 A top view of a mounting base for a cable protection tube cutting machine according to an embodiment of the present disclosure is shown;

[0092] Figure 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.

[0093] Description of the numbers in the figure:

[0094] 1. Cutting box; 100. Frame; 1001. Guide rod; 1002. Frame; 1003. Guide wheel;

[0095] 10. Rotating plate; 101. Perforating;

[0096] 11. Cutting components;

[0097] 111. Cutting mechanism;

[0098] 1111, saw blade; 11111, positioning hole; 1112, cutting blade; 1113, driving source; 1114, spline shaft; 1115, mounting plate; 11151, limiting protrusion; 1116, spline sleeve; 11161, avoidance ring groove; 111611, guide bevel;

[0099] 1117, mounting seat; 11171, connecting outer edge; 11172, limiting block;

[0100] 1118, limit seat; 11181, first mounting ring groove; 11182, rotation groove; 111821, first end wall; 111822, second end wall;

[0101] 1119, electromagnetic assembly; 11191, first seat; 111911, first protective retaining ring; 11192, second seat; 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;

[0102] 112. Counterweight mechanism;

[0103] 113. Second driving member;

[0104] 1131, second servo motor; 1132, lead screw; 1133, transmission block;

[0105] 114, slide rail;

[0106] 115, positioning plate; 1151, through hole;

[0107] 116. Positioning seat;

[0108] 12. First driving member; 121. First servo motor; 122. Gear; 123. Ring gear;

[0109] 2. Feeding device;

[0110] 21. Clamp assembly;

[0111] 211, first plywood; 212, second plywood; 20, rubber pad;

[0112] 201, fourth driving member; 2011, fourth servo motor; 2012, double-ended reverse screw; 2013, pulley assembly

[0113] 22. Third driving member;

[0114] 221, third servo motor; 222, driving gear; 223, rack;

[0115] 23. Sliding plate; 231. First linear guide rail; 232. Support roller; 24. Second linear guide rail; 25. Optical beam;

[0116] 3. Circumferential fixture;

[0117] 31. First circumferential fixture; 32. Second circumferential fixture;

[0118] 311, positioning plate; 312, clamping claw; 313, clamping roller; 314, synchronous connecting rod; 315, driving rod; 316, clamping cylinder; 3111, first slot; 3112, second slot; 3121, first screw; 3122, second screw; 3123, third screw; 3124, fourth screw;

[0119] 4. Lifting components;

[0120] 41. Elevator; 42. Lifting screw;

[0121] 5. Locking parts;

[0122] 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

[0123] To make the purposes, features, and advantages of the present disclosure more apparent and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative work shall fall within the scope of protection of the present disclosure.

[0124] 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 provided inside the cutting box 1, a circumferential clamp 3 is provided on the cutting box 1 along the axial direction of the protection tube, a frame 100 is provided on the outside of the cutting box 1, and a lifting assembly 4 is provided on the frame 100 for realizing the lifting of the cutting box 1.

[0125] 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.

[0126] 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 axis 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.

[0127] It is worth mentioning that, since the protective tube is long before being cut, it is easy to bend. 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.

[0128] like Figure 3 As shown, a rack 1002 is also included, wherein the rack 1002 is welded to the frame 100 and is used for installing the feeding device 2. The feeding device 2 is installed on the rack 1002, so that the protective tube can be conveniently clamped and transported.

[0129] Specifically, such as Figure 9 and Figure 10 As shown, after the protective tube is placed on the feeding device 2, the protective tube can be clamped and fixed by using the clamping plate assembly 21. In order to be able 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.

[0130] 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, wherein it 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 engaged with each other, wherein the splint assembly 21 is installed on the sliding plate 23.

[0131] It is worth noting 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 protection, a protective tube of precise length can be fed into the cutting box 1.

[0132] In order to clamp and fix the protection tube, in this embodiment, Figure 9 and Figure 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. 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.

[0133] Specifically, such as Figure 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 a first clamping plate 211 and a second clamping plate 212 are respectively threadedly connected to the threaded segments at the two ends of the double-ended reverse screw 2012, wherein the threads of the two threaded segments have opposite rotation directions. 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 toward or away from each other. It is worth noting that the approach to or distance from each other here refers to the axial direction of the double-ended reverse screw 2012.

[0134] In order to ensure the stable movement of the first clamping plate 211 and the second clamping plate 212, in this embodiment, as shown in FIG. Figure 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 .

[0135] In this embodiment, if Figure 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 as to accurately control the number of rotations of the double-headed reverse screw 2012, thereby facilitating the calculation of the distance traveled by the first clamping plate 211 and the second clamping plate 212.

[0136] The first and second clamping plates 211 and 212 are both provided with rubber pads 20. When the first and second clamping plates 211 and 212 clamp the protective tube, the rubber pads 20 come into contact with the protective tube. The use of the rubber pads 20 can reduce the risk of damage to the protective tube.

[0137] 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 the 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 the open state, Figure 10 As shown, the dotted line in the figure represents the zero 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 based on the number of turns of the double-headed reverse screw 2012 and the pitch of 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, where the diameter of the protective tube D3=D1-2×D2.

[0138] 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. In this embodiment, Figure 10 As shown, a supporting roller 232 is rotatably installed on the frame 1002 to support the protective tube, 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.

[0139] 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. However, 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 through 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 its axial direction, affecting the cutting of the protective tube by the cutting assembly 11.

[0140] 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 axis 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 an elevator 41 and a lifting screw 42, wherein the elevator 41 is fixed to the frame 100, the output end of the elevator 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 elevator 41 can determine the number of rotations of the lifting screw 42 based on the diameter of the protective tube and the original height of the cutting box 1, thereby readjusting the position of the cutting box 1 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 elevator 41. Since this control method is conventional, the installation location and control mechanism of the position sensor and the central control unit will not be elaborated here.

[0141] Through the above-mentioned setting, 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 distance traveled by the first clamping plate 211 and the second clamping plate 212, so that the lifting screw 42 can be driven to rotate by the elevator 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.

[0142] It is worth noting here 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 using the hinge block.

[0143] In order to achieve stable lifting of the cutting box 1 and improve the stability of the cutting box 1, in this embodiment, as shown in FIG. 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.

[0144] In order to be able to clamp the protective tube using the first circumferential clamp 31 and the second circumferential clamp 32, 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, and 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.

[0145] like Figure 6 and Figure 7 As shown, it includes two relatively arranged positioning plates 311, wherein the axes of the two positioning plates 311 coincide with each other, and the positioning plates 311 are fixedly installed on the outer wall of the cutting box 1, wherein the positioning plates 311 are annular so that the protective tube can pass through them, and the two positioning plates 311 also include a plurality of clamping claws 312 between them, wherein the plurality of clamping claws 312 are rotatably connected to the positioning plates 311 through a first screw 3121, and the plurality of clamping claws 312 are evenly distributed along the circumference of the positioning plates 311. In this embodiment, the number of the clamping claws 312 is six as an example. Specifically, the 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. 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.

[0146] In order to adjust the state of the clamping claw 312, in this embodiment, as shown in FIG. 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 link 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 rod 315 .

[0147] It is worth mentioning here that Figure 7 As shown, the first screw 3121 , the second screw 3122 , and the third screw 3123 are distributed in a triangle.

[0148] 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, thereby causing the clamping claw 312 to move 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 link 314. As the synchronous link 314 transmits power, all clamping claws 312 can clamp the protective tube synchronously; when the output shaft of the clamping electric cylinder 316 retracts inward, at this time, the clamping claw 312 is driven to rotate by the driving rod 315 and the synchronous link 314, so that the circumferential clamp 3 can be opened and the clamping of the protective tube can be released.

[0149] 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, there are six first slots 3111 and they correspond one to one with the fourth screws 3124. 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 opening; the outer side of the positioning plate 311 is provided with a second slot 3112 corresponding to the third screw 3123, wherein the second slot 3112 is located at the intersection of the outer wall of the positioning plate 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 continuing to move toward the axis of the positioning plate 311.

[0150] 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 be able to cut the protection tube, in this embodiment, as shown in FIG. Figure 8 and Figure 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. 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.

[0151] 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 along the radial direction of the protective tube toward one side of the protective tube, thereby realizing the cutting of the protective tube.

[0152] 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 engaged with each other.

[0153] With the above arrangement, the first servo motor 121 drives the gear 122 to rotate, and the mutually meshing gear rings 123 drive the rotating plate 10 to rotate, thereby enabling the cutting mechanism 111 to rotate around the axis of the protective tube.

[0154] 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, as shown in FIG. Figure 8 and Figure 11 As shown, the rotating plate 10 is fixed with a slide rail 114 located on one side of the perforation 101, 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.

[0155] 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, which 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.

[0156] In this embodiment, if Figure 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 arranged 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, 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.

[0157] Through the above-mentioned arrangement, when the protective tube is being cut, the rotating plate 10 will rotate around the axis of the protective tube. In order to be able to cut the protective tube, the second servo motor 1131 drives the screw rod 1132 to rotate, and then drives the counterweight mechanism 112 and the cutting mechanism 111 to move synchronously toward one side of the protective tube through the transmission block 1133, and then the protective tube is cut using the cutting mechanism 111.

[0158] Specifically, in this embodiment, Figure 11 and Figure 12 As shown, a positioning plate 115 is further 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 .

[0159] 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 function of the above-mentioned cutting equipment.

[0160] In this embodiment, if Figure 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.

[0161] Among them, when cutting the protective tube of fiberglass and PVC, 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 high speed to complete the cutting of the protective tube. At this time, the cutting knife 1112 is in the first state under the drive of the driving source 1113. In this state, the cutting knife 1112 cannot touch the protective tube, thereby preventing 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, Figure 11The cutting knife 1112 is in the first state, Figure 12 The cutting knife 1112 is in the second state, and the cutting knife 1112 can be used to cut the protective tube.

[0162] It is worth noting here that after the cutting knife 1112 is installed, the cutting part of the cutting knife 1112 is projected onto the saw blade 1111 along the output shaft of the driving source 1113 and exceeds the saw blade 1111. Therefore, in the second state, the cutting knife 1112 can be used to cut the protective tube, wherein the part 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.

[0163] 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 .

[0164] In order to improve the stability of the saw blade 1111, in this embodiment, as Figure 14 and Figure 16 As shown, a mounting disk 1115 is fixedly mounted 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, a bolt is threadedly connected to the threaded hole 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.

[0165] Specifically, in order to prevent the saw blade 1111 and the mounting plate 1115 from rotating relative to each other, in this embodiment, Figure 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.

[0166] 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 the high-speed rotating processing state, the cutting knife 1112 needs to be kept in the first state to reduce the interference caused by the cutting knife 1112 on the cutting of the protective tube. Therefore, in the first state, the output of the driving source 1113 power needs to be controlled. In this embodiment, Figure 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 outside of the spline shaft 1114 to form a spline connection, the mounting seat 1117 is sleeved on the outside 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.

[0167] Among them, in the first state, the locking member 5 releases the lock of the mounting seat 1117 and the spline sleeve 1116, and in the second state, the locking member 5 realizes the lock 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.

[0168] The mounting seat 1117 is provided with a plug hole, and the cutting knife 1112 is installed in the plug hole and fixed on the mounting seat 1117 .

[0169] In order to switch the mounting base 1117 between the two states, in this embodiment, as shown in FIG. Figure 16 and Figure 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 released from the locked state, the locking tongue 52 is disengaged from the locking groove 53.

[0170] Among them, the locking member 5 also 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 lock tongue 52 to push the lock tongue 52 into the locking groove 53.

[0171] It is worth noting here that, under normal circumstances, the mounting hole 51 can be installed on the spline sleeve 1116, the locking groove 53 is set 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.

[0172] In order to improve the stability of the mounting seat 1117 and the spline sleeve 1116 after being locked, in this embodiment, at least two groups of locking members 5 are provided and are evenly distributed along the circumference of the spline sleeve 1116 .

[0173] 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.

[0174] 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 Figure 20 and Figure 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.

[0175] In order to enable the locking member 5 to switch between the first state and the second state, the present embodiment further 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.

[0176] Specifically, in this embodiment, Figure 17 As shown, the electromagnetic assembly 1119 includes a first base 11191, a second base 11192, a second spring 11193, an electromagnetic coil 11194 and an armature ring 11195, wherein Figure 15 and Figure 16 As shown, Figure 15 In the embodiment, the electromagnetic assembly 1119 is in an unpowered state. Figure 16 In the embodiment, the electromagnetic assembly 1119 is in an energized state. Specifically, the first seat body 11191 is sleeved on the outside 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 outside of the output shaft of the driving source 1113 and is slidingly connected to the first seat body 11191 along the direction of the output shaft 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 outside 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. The second end of the second spring 11193 is fixedly connected to the second seat body 11192. The second seat body 11192 is connected to the spline sleeve 1116 through a bearing.

[0177] Specifically, such as Figure 16 and Figure 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 outside of the output shaft of the driving source 1113, wherein the second spring 11193 is sleeved on the outside 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 used to prevent the second spring 11193 from contacting the output shaft of the driving source 1113.

[0178] 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, 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.

[0179] In order to facilitate the installation of the bearing in the second mounting ring groove 111922, as shown in FIG. Figure 17 As shown, the inner wall of the second mounting ring groove 111922 is provided with a plurality of limiting slots 1119221, wherein limiting rubber columns 1119222 are installed in the limiting slots 1119221, wherein the limiting rubber columns 1119222 are interference fit with the outer wall of the bearing outer ring.

[0180] In order to realize the installation of the mounting base 1117, in this embodiment, as shown in FIG. Figure 18 and Figure 20 As shown, it includes a limit seat 1118, wherein the limit seat 1118 is fixedly mounted on the positioning plate 115 by bolts, a first mounting ring groove 11181 is provided on the limit seat 1118, and a connecting outer edge 11171 is provided on the mounting seat 1117 which is 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.

[0181] 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. Figure 18 and Figure 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. 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. 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.

[0182] 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, Figure 12 As shown, the cutting knife 1112 forms an angle α with the first direction. The first direction here 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. The angle α here is between 1°-5°. In this embodiment, the angle is 3°.

[0183] like Figure 12 As shown in this figure, the rotating plate 10 rotates in a counterclockwise direction, and the dotted line in the through-hole 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 restricted, thereby ensuring the stability of the cutting knife 1112 during the cutting process.

[0184] If the cutting part of the cutting knife 1112 is directly pointed at 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.

[0185] When the cutting knife 1112 is in the first state, the saw blade 1111 cuts the protective tube. As the rotating plate 10 rotates, the cutting knife 1112 is at risk of returning to the second state. Therefore, in this embodiment, Figure 17 and Figure 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 fixed 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.

[0186] 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. Figure 22 As shown, the locking end of the lock tongue 52 is in the shape of a right-angled trapezoid, and 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 recessed toward the radial inner side 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. , wherein 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 is also provided in the locking groove 53 to abut against the side wall of the lock tongue 52. When the lock tongue 52 is inserted into the locking groove 53, the side wall of the lock 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.

[0187] 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 driving source 1113. At this time, the lock tongue 52 abuts against the guide inclined surface 111611, and then pushes the lock tongue 52 into the mounting hole 51 and compresses the first spring 54. After that, 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.

[0188] When the electromagnetic coil 11194 is powered off, the second spring 11193 pushes the spline sleeve 1116 to move toward the side close to the saw blade 1111. Since the guide bevel 521 abuts 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.

[0189] The above design can solve the problem of mutual friction between the lock tongue 52 and the spline sleeve 1116. At the same time, it can utilize the movement of the second seat body 11192 in the electromagnetic assembly 1119 to drive the switching of the position of the limit column 111923, thereby further limiting the mounting seat 1117, preventing the rotation of the rotating plate 10, and switching the mounting seat 1117 from the first state to the second state.

[0190] It is worth mentioning here that Figure 9 As shown, the clamping plate assembly 21 is also equipped with a photoelectric device 25 for detecting the protective tube, wherein the emitter 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 enable the operator to reload the material so that the protective tube can be cut again.

[0191] 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.

[0192] 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 first cut off a part of the end of the protective tube (the cut end here 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.

[0193] 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.

[0194] The cutting method of the protective tube is as follows: Figures 1 to 13 As shown, the steps for cutting the protective tube are as follows:

[0195] In the initial state, the clamp assembly 21 is placed in the zero position (open) for 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 circumferential clamp 31 and the distance L2 between the cutting knife 1112 and the side wall of the first circumferential clamp 31 are at a constant value.

[0196] S1: Place the protective tube between the clamping plate assemblies 21 of the frame 1002;

[0197] S2: The through-beam 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;

[0198] S3: Based on the number of revolutions of the double-ended reverse screw 2012 in the fourth driving member 201 and the pitch of the threaded segment, calculate the distance 2×D2 moved by the first clamping plate 211 and the second clamping plate 212. Since the distance D1 between the first clamping plate 211 and the second clamping plate 212 is constant when they are at the zero position, the diameter of the protective tube can be calculated as D3 = D1 - 2×D2.

[0199] S4: Based on the material of the protective tube in S1, a suitable sawing tool, a saw blade 1111 or a cutting knife 1112, is selected using the driving source 1113. Then, the cutting mechanism 111 is moved away from the perforation 101 using the second driving member 113 to reduce interference in the process of feeding the protective tube into the inner cavity of the cutting box 1.

[0200] S5: Based on the diameter D3 of the protective tube calculated in S3, the cutting box 1 is driven up and down by the lifting assembly 4 so that the axes of the first circumferential clamp 31 and the second circumferential clamp 32 and the axis of the protective tube coincide with each other;

[0201] 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;

[0202] S7: Based on S6, the clamping plate assembly 21 and the protective tube are conveyed into the inner cavity of the cutting box 1 by the third driving member 22, and then the end wall of the protective tube is brought into contact with the end wall of the first circumferential clamp 31. At this time, the end wall of the protective tube extends beyond the saw blade 1111 by a length L1, and the end wall of the protective tube extends beyond the cutting blade by a length L2.

[0203] S8: The clamping electric cylinder 316 in the second circumferential clamp 32 causes 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 opens the first circumferential clamp 31 to allow the subsequent protective tube to pass through.

[0204] 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 protective tube, and then using the third driving member 22 to drive the clamping plate assembly 21 to move away from the circumferential clamp 3;

[0205] S10: Based on S9, the clamping plate assembly 21 clamps the protective tube again, and then the second circumferential clamp 32 releases the clamping of the protective tube;

[0206] S11: The third driving member 22 drives the clamping plate assembly 21 to continue conveying the protective 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 protective tube simultaneously; the above steps S9-S11 are repeated until the length of the first section of the protective tube to be cut is reached;

[0207] 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. Then, the second driving member 113 drives the cutting mechanism 111 and the counterweight mechanism 112 to move synchronously toward one side of the protective tube, thereby cutting the protective tube.

[0208] S13: After the protective tube is cut, the second driving member 113 drives the cutting mechanism 111 and the counterweight mechanism 112 to move away from the protective tube. Then, the clamping plate assembly 21 is used to clamp the protective tube, and the first circumferential clamp 31 and the second circumferential clamp 32 release their grip on the protective tube.

[0209] S14: The protective tube is driven by the third driving member 22 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. The length of the next section of the protective tube to be cut is re-determined according to steps S9-S11, and the protective tube is cut again according to steps S12-S13.

[0210] S15: When the photoelectric device 25 detects that there is no protective tube between the clamping plate assemblies 21, the cutting machine will sound an alarm to remind the operator to load the material in time.

[0211] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of this disclosure can be achieved. This is not a limitation herein.

[0212] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0213] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A cable protection tube cutting machine, 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 around the protective tube, and the first driving member is used to drive the cutting assembly to rotate around the protective tube; The cutting assembly includes a cutting mechanism and a second driving member. The cutting mechanism is mounted on the second 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 that drives the clamping plate assembly to move axially along the protective tube. The clamping plate assembly is used to clamp the protective 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 protective tube. The circumferential clamp comprises a first circumferential clamp and a second circumferential clamp installed on both sides of the cutting box, wherein the first circumferential clamp and the second circumferential clamp are arranged along the axial direction of the protective 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; The device further comprises a counterweight mechanism, wherein the counterweight mechanism and the cutting mechanism are symmetrically arranged about the axis of the protective tube, and a second driving member is dynamically connected to both the counterweight mechanism and the cutting mechanism to drive the counterweight mechanism and the cutting mechanism to move synchronously; 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 to the end wall of the spline shaft on the side 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 is arranged on the outside of the spline sleeve and is rotatably connected to the spline sleeve, and the cutting knife is fixedly installed on the mounting seat; A locking member is installed between the mounting seat and the spline sleeve to switch the mounting seat and the spline sleeve between a locked state and an unlocked state; The locking parts include: A mounting hole, the mounting hole being provided on the inner wall of the mounting seat; A lock tongue is slidably mounted in the mounting hole; Locking grooves, a plurality of which are provided and located on the peripheral wall of the spline sleeve; a first spring, the first spring being installed in the mounting hole, one end of the first spring being in contact with the inner wall of the mounting hole, and the other end of the first spring being in contact with 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 disengaged from the locking groove; The cutting mechanism further comprises an avoidance ring groove provided on the peripheral wall of the spline sleeve, wherein 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 outside 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.

2. The cable protection tube cutting machine according to claim 1, characterized in that: The mounting seat is provided with a plug hole. 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 blade is set away from the protection tube. In the second state, the cutting blade abuts 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.

3. The cable protection tube cutting machine according to claim 2, characterized in that: The cutting mechanism further 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 is rotatably connected to 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 is fixedly provided on the mounting seat and inserted into the rotation groove. 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.

4. The cable protection tube cutting machine according to claim 1, characterized in that: The electromagnetic components include, The first base body is fixedly mounted on the positioning plate, and an electromagnetic coil is fixedly mounted on the first base body; A second seat body is connected to the first seat body in an axially sliding manner along 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 is provided between the first base and the second base, one end of the second spring is connected to the first base, and the other end of the second spring is connected to the second base; A limiting column, which is fixedly mounted on the second base 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.

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

6. The cable protection tube cutting machine according to claim 1, 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 for 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 for 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 the fourth servo motor is internally provided with a zero point for resetting the first clamping plate and the second clamping plate to their original state; 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 protective 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. The third servo motor is fixedly mounted on the clamping plate assembly. The first circumferential clamp is located at a side away from the feeding device, and the second circumferential clamp is located at a side close to the feeding device.

7. A method for cutting a cable protection tube, using the cable protection tube cutting machine according to claim 6, characterized in that: The cutting method including the cable protection tube is as follows: S1: placing the protective tube on the rack 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-ended reverse screw to rotate, so that the first clamping plate and the second clamping plate move synchronously toward the protective tube. When the torque of the fourth servo motor increases instantaneously, the fourth servo motor stops running, thereby clamping the protective tube; S3: Calculate the distance D2 traveled by the first and second clamping plates according to the number of revolutions of the fourth servo motor, and calculate the diameter of the protective tube D3 = D1 - 2 × D2; S4: Using the lifting assembly to adjust the position of the cutting box so that the axes of the first circumferential clamp and the second circumferential clamp are coaxial with the axis of the protective 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 protective tube to remove the obstacle of the protective 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 protective tube; when the cutting knife is selected, the cutting knife switches to the second state; S7: Using the third servo motor to drive the drive gear to rotate, thereby enabling the clamping plate assembly and the protective tube to move along the axial direction of the protective tube into the inner cavity of the cutting box, so that the end wall of the protective tube abuts against the side wall of the clamping claw in the first circumferential clamp, thereby achieving preliminary positioning of the protective 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, loosening the clamping of the protective tube, and 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 protective tube, the clamping electric cylinder opens the first circumferential clamp and the second circumferential clamp, releases the clamping of the protective tube, and the feeding device continues to feed the protective tube. Then, the first circumferential clamp and the second circumferential clamp are used to re-clamp the protective tube, and the above steps S9-S10 are repeated to achieve accurate measurement of the length of the protective tube; S11: The first circumferential clamp and the second circumferential clamp clamp the protective tube, the first driving member drives the cutting assembly to rotate around the axis of the protective tube, and the second driving member drives the cutting mechanism to move radially inward along the protective tube to cut the protective tube; S12: The clamp assembly re-clamps the protective tube, and then the first circumferential clamp and the second circumferential clamp are opened. The feeding device transports the protective tube into the inner cavity of the cutting box. 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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