CN113078579A

CN113078579A - Wire cutter

Info

Publication number: CN113078579A
Application number: CN202110359405.4A
Authority: CN
Inventors: 程敏; 刘久晨; 张大伟; 黄志康; 胡立鸥
Original assignee: Yijiahe Technology Co Ltd
Current assignee: Yijiahe Technology Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-07-06
Anticipated expiration: 2041-04-02
Also published as: CN113078579B

Abstract

The invention discloses a wire breaker, comprising: a cutting assembly for cutting the cable; the butt joint assembly is butted with the tail end of the mechanical arm; and the driving assembly is respectively connected with the butt joint assembly and the shearing assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm when the butt joint assembly is in butt joint with the tail end of the mechanical arm so as to transmit torque and drive the shearing assembly to shear the cable. The wire breaker is suitable for live working of a robot, and is simple in structure and easy to install; the wire cutter is provided with the clamping mechanism, so that the wire cutter is suitable for shearing, clamping and discarding the leads with different wire diameters in various lead overlapping scenes, and the working efficiency and the safety are greatly improved.

Description

Wire cutter

Technical Field

The invention relates to the field of electric power operation, in particular to a wire breaker.

Background

The drainage wire breaking is the most common operation flow in the power industry, and at present, the main mode of the drainage wire breaking operation is an insulating rod operation method using an insulating rod wire cutting shear or an insulating glove operation method using a ratchet wheel cable cutter. After the insulation shielding is finished, an operator firstly fixes the lead to be broken by using an insulation lock rod, then cuts the lead at the joint of the branch line lead and the main lead by using an insulation rod wire cutting shear or a ratchet wheel cable cutter, and finally cuts and takes down the lead at the strain clamp of the branch line. The whole operation in-process needs to use multiple insulating protective tool and insulating tool, needs manual operation in addition, has the problem such as complex operation, safe risk height. With the development of robots in special industries, aiming at the defects existing in the current live-line drainage wire breaking, in order to improve the working efficiency, a robot tail end execution tool needs to be developed, and the robot can complete the operation task of the drainage wire.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the defects of safety risk, complicated operation process and the like of manual drainage wire breaking operation by using insulating rod wire clippers or ratchet wheel cable cutters, the invention provides the wire breaker for the grabbing operation of the trial-matching robot.

The technical scheme is as follows:

a wire cutter comprising:

a cutting assembly for cutting the cable;

the butt joint assembly is butted with the tail end of the mechanical arm;

and the driving assembly is respectively connected with the butt joint assembly and the shearing assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm when the butt joint assembly is in butt joint with the tail end of the mechanical arm so as to transmit torque and drive the shearing assembly to shear the cable.

The butt joint assembly comprises a guiding positioning disc and a tool disc which are fixedly connected with each other, and a butt joint groove in butt joint with the tail end of the mechanical arm is formed in the center of the tool disc.

The shearing assembly comprises a movable cutter and a fixed cutter, the cutting edges of the movable cutter and the fixed cutter are in shearing fit, the fixed cutter is fixedly arranged on the driving assembly, and the middle part of the movable cutter is rotatably connected with a fixed cutter handle to form shearing fit; the driving assembly comprises a reciprocating motion mechanism which is connected with the tail end of the movable cutter and drives the movable cutter to rotate around the rotary connection part of the movable cutter and the fixed cutter; the reciprocating mechanism is in butt joint with the insulating rod at the tail end of the mechanical arm and is driven by the insulating rod at the tail end of the mechanical arm to do reciprocating motion.

The reciprocating mechanism comprises a screw rod, a screw rod nut is arranged on the screw rod in a matching mode, a support frame is fixedly arranged on the butt joint assembly, two ends of the screw rod are rotatably arranged on the support frame through bearings, a connecting rod is rotatably connected to the screw rod nut, and the tail end of the connecting rod is rotatably connected with the tail end of the movable cutter; the screw rod penetrates through the butt joint assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm through a transmission pin.

The sum of the length from the joint of the movable knife and the fixed knife handle to the end of the movable knife and the length of the connecting rod is greater than the distance from the joint of the movable knife and the fixed knife to the joint of the connecting rod and the screw nut.

A nut seat is fixedly arranged on the feed screw nut, and the connecting rod is rotationally connected with the nut seat; guide rods are respectively and fixedly arranged on the support frame at two sides of the screw rod, and corresponding guide holes are respectively arranged at corresponding positions on the nut seat; the nut seat is matched with the guide rod through the guide hole to realize the motion guide of the nut seat.

The clamping assembly comprises an upper clamping block and a lower clamping block, and the upper clamping block is fixedly arranged on the side surface of the moving knife body; the lower clamping block is fixedly arranged on the driving assembly and is positioned below the upper clamping block.

The driving assembly is fixedly provided with a triangular seat at a position below the upper clamping block, the bottom of the triangular seat is fixedly provided with at least one guide pillar, a rectangular spring is sleeved outside the guide pillar, and the lower clamping block is fixedly arranged at the tail end of the guide pillar.

The driving assembly further comprises a transition mechanism, the transition mechanism comprises a transition support frame fixedly connected with the butt joint assembly, a transmission shaft is rotatably mounted in the transition support frame through a bearing, and the transmission shaft penetrates through the butt joint assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm through a transmission pin; the tail end of the transmission shaft drives the reciprocating motion mechanism to reciprocate through the matching of a gear.

The reciprocating mechanism comprises a screw rod, and the base is a screw rod nut; a bracket seat is fixedly arranged on the transition support frame, two ends of the screw rod are rotatably arranged on the bracket seat through bearings, the screw rod nut is arranged on the screw rod in a matched manner, and the connecting rod is rotatably connected with the screw rod nut;

and a first bevel gear is fixedly arranged on the transmission shaft, and a second bevel gear meshed with the first bevel gear is fixedly arranged on the screw rod.

The clamping assembly comprises an upper clamping block and a lower clamping block, and the upper clamping block is fixedly arranged on the side surface of the fixed cutter body; the lower clamping block is fixedly arranged on the side surface of the movable knife body and at the position corresponding to the upper clamping block.

The movable knife comprises a movable knife body and a lower clamping block, wherein a triangular seat is fixedly arranged at the position, corresponding to the upper clamping block, of the side face of the movable knife body, at least one guide pillar is fixedly arranged at the bottom of the triangular seat, a rectangular spring is sleeved outside the guide pillar, and the lower clamping block is fixedly arranged at the tail end of the guide pillar.

The clamping surfaces of the upper clamping block and the lower clamping block are both V-shaped.

The movable knife body is characterized by further comprising a clamping block, wherein a clamping groove is formed in the clamping block, the lower portion of the clamping groove is fixedly installed at the tail end of the movable knife body, and the upper portion of the clamping groove is matched with the tail end of the fixed knife body when the movable knife is sheared and attached to the fixed knife.

Has the advantages that: the wire breaker is suitable for live working of a robot, and is simple in structure and easy to install; the wire cutter is provided with the clamping mechanism, so that the wire cutter is suitable for shearing, clamping and discarding the leads with different wire diameters in various lead overlapping scenes, and the working efficiency and the safety are greatly improved.

Drawings

Fig. 1 is an overall schematic view of a vertical wire breaker according to a first embodiment of the present invention.

Fig. 2 is a sectional view of a vertical wire cutter according to a first embodiment of the present invention.

Fig. 3 is a schematic view of a clamping mechanism of the vertical wire cutter according to the first embodiment of the invention.

Fig. 4 is a schematic diagram of a wire breaking operation of the vertical wire breaker according to the first embodiment of the present invention.

Fig. 5 is an overall schematic view of a transverse wire cutter according to a second embodiment of the present invention.

Fig. 6 is a sectional view of a transverse wire cutter according to a second embodiment of the present invention.

Fig. 7 is an axial view of a transverse wire cutter according to a second embodiment of the present invention.

Fig. 8 is a schematic diagram of the wire cutting operation of the transverse wire cutter according to the second embodiment of the present invention.

Wherein, 1 is a clamping component, 2 is a shearing component, 3 is a driving component, 4 is a butt joint component, and 5 is a cable;

11 is an upper clamping block, 12 is a lower clamping block, 13 is a clamping block, 14 is a triangular seat, 15 is a first bushing, 16 is a guide post, and 17 is a rectangular spring;

21 is a moving knife, 22 is a fixed knife, 23 is a first locknut, and 24 is a second locknut;

301 is a transition support frame, 302 is a support frame base, 303 is a transmission pin, 304 is a transmission shaft, 305 is a deep groove ball bearing, 306 is a small bevel gear, 307 is a first support end, 308 is a second support end, 309 is a screw rod, 310 is a second bushing, 311 is a thrust ball bearing, 312 is a screw rod nut, 313 is a nut base, 314 is a connecting rod, 315 is a large bevel gear, 316 is a guide hole, 317 is a third bushing, 318 is a guide rod, 319 is a bearing, 320 is an elastic retainer ring for a shaft, 321 is a shaft shoulder screw, 322 is a first flat key, and 323 is a second flat key; the tool tray 41, the guiding positioning tray 42, the inclined plane block 43, the locking rod 44 and the spring 45 are respectively arranged on the upper surface of the tool tray and the lower surface of the tool tray.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

The first embodiment is as follows:

fig. 1 is an overall schematic view of a vertical wire breaker according to a first embodiment of the present invention. As shown in fig. 1, the vertical wire cutter according to the first embodiment of the present invention includes a clamping assembly 1, a shearing assembly 2, a driving assembly 3, and a butt assembly 4.

As shown in fig. 2, the docking assembly 4 includes a tool tray 41 and a guiding and positioning tray 42, the guiding and positioning tray 42 is fixedly connected with the tool tray 41 through screws, and both are hollow structures; the center of the tool tray 41 is provided with a butt joint groove, the lower surface of the tool tray 41 is provided with a mounting groove corresponding to a roller bearing column at the tail end of the mechanical arm, and at least three inclined surface blocks 43 are uniformly and inversely mounted in the mounting groove; the lower surface of the inclined plane block 43 is of a spiral structure, the terminal end of the spiral structure is fixedly arranged in the mounting groove through a screw, and the starting point of the spiral structure of the inclined plane block 43 is provided with a butt joint groove corresponding to the roller at the tail end of the roller support column and used for butt joint with the roller; the side wall of the mounting groove in the tool tray 41 is attached to the end of the spiral structure of the inclined plane block 43 to limit the movement of the roller at the end of the roller support column.

A locking groove is formed in the outer side wall of the tool disc 41 along the circumferential direction, a cylindrical pin mounting hole is formed in the upper surface of the tool disc 41 at a position corresponding to the locking groove, a cylindrical pin penetrates through the cylindrical pin mounting hole to mount the upper lock rod 44 in the locking groove, and the upper lock rod 44 can be vertically mounted in a rotating mode by taking the cylindrical pin as a fulcrum; the tail end of the upper lock rod 44 is arranged at the end point of the spiral structure of the inclined plane block 43, and abuts against the roller at the lower end of the roller support column when the tail end of the mechanical arm is in butt joint with the tool disc 41, so that the rotation of the roller is limited, and the rotation between the tail end of the mechanical arm and the tool disc 41 is further limited; a pressing block is provided at the tip of the upper lock lever 44, and a spring 45 is attached between the inner arm of the pressing block of the upper lock lever 44 and the cylindrical surface of the tool tray 41 at a position corresponding to the pressing block of the upper lock lever 44.

As shown in fig. 1 and 2, the driving assembly 3 of the vertical wire cutter of this embodiment includes a transition support frame 301, a lead screw 309, a lead screw nut 312 and a connecting rod 314, wherein the transition support frame 301 and the guide positioning plate 42 are fixedly connected by screws, the upper and lower ends of the transition support frame 301 are respectively provided with a first support end 307 and a second support end 308, the lead screw 309 is inserted into the transition support frame 301, the two ends of the lead screw are respectively installed at the first support end 307 and the second support end 308 by a bearing 319, and two end surfaces of the bearing 319 are respectively provided with a shaft elastic collar 320 and a collar.

The lower end of the screw 309 passes through the guiding positioning plate 42 and the tool plate 41 of the docking assembly 4, and the lower end thereof is fixedly provided with a transmission pin 303, and the transmission pin 303 is docked with an insulating rod at the end of the mechanical arm so as to transmit torque. In the present invention, a transmission shaft 304 may also be inserted into the guiding and positioning plate 42 and the tool plate 41, a transmission pin 303 is fixedly installed at the end of the transmission shaft 304, and the other end thereof is fixedly connected with a screw rod 309. A feed screw nut 312 is fittingly installed on the feed screw 309, a nut seat 313 is fixedly installed on the feed screw nut 312, and the nut seat 313 can move on the feed screw 309 along with the feed screw nut 312; the nut holder 313 is rotatably mounted with a connecting rod 314 by a shoulder screw 321.

In this embodiment, guide rods 318 are further fixedly mounted on the transition support frame 301 at two sides of the lead screw 309, corresponding guide holes 316 are respectively formed at corresponding positions on the nut seat 313, a third bushing 217 is disposed in the guide hole 316, the guide rod 318 is fitted in the guide hole 316 of the nut seat 313, and the nut seat 313 realizes the movement guidance of the nut seat 313 through the fitting of the guide hole 316 and the guide rod 318.

As shown in fig. 1, 2 and 3, the shearing assembly 2 includes a movable knife 21 and a fixed knife 22, wherein the fixed knife 22 is fixedly mounted on the first supporting end 307 through a screw, the middle part of the movable knife 21 is rotatably mounted on a handle of the fixed knife 22 through a first locknut 23, and the cutting edges of the movable knife 21 and the fixed knife 22 are matched in opposite directions to form a shearing structure; the end part of the movable knife 21 is connected with the tail end of the connecting rod 314 in a rotating fit mode through a second locknut 24. When the nut seat 313 moves on the lead screw 309 along with the lead screw nut 312, the connecting rod 314 moves along with the nut seat, and at the moment, the movable knife 21 rotates through the rotating fit with the tail end of the connecting rod 314, so that the shearing motion between the movable knife 21 and the fixed knife 22 is realized through the rotating fit of the movable knife 21 and the handle of the fixed knife 22, and the cable is sheared.

In the invention, the sum of the length from the joint of the movable knife 21 and the fixed knife 22 to the end of the movable knife 21 and the length of the connecting rod 314 is greater than the distance from the joint of the movable knife 21 and the fixed knife 22 to the joint of the connecting rod 314 and the nut seat 313.

As shown in fig. 1, 2 and 3, the clamping assembly 1 includes an upper clamping block 11 and a lower clamping block 12, the upper clamping block 11 is fixedly mounted at the side of the moving blade 21 through screws, and is provided with a clamping surface, the clamping surface is flush with the superposed surface of the moving blade 21 and the fixed blade 22 when shearing, and the clamping surface is in a V shape; a triangular seat 14 is fixedly arranged below the upper clamping block 11 on the side of the first supporting end 307 through a screw, at least two guide posts 16 are fixedly arranged at the bottom of the triangular seat 14, rectangular springs 17 are sleeved outside the guide posts 16, the lower clamping block 12 is fixedly arranged at the tail ends of the guide posts 16 through screws, and the lower clamping block 12 is provided with a clamping surface which is V-shaped; the lower clamping block 12 is matched with the upper clamping block 11 for clamping the cable.

In the embodiment, a clamping block 13 is fixedly mounted at the end of the movable blade 21 body by a screw, the clamping block 13 is provided with a clamping groove, the lower part of the clamping groove is fixedly connected with the end of the movable blade 21 body by a screw, and the upper part of the clamping groove is matched with the end of the fixed blade 22 body when the movable blade 21 is sheared and jointed with the fixed blade 22, so as to be pressed by the movable blade 21 and the fixed blade 22 when the movable blade 21 and the fixed blade 22 are sheared and jointed.

Fig. 4 is a schematic diagram of the wire cutting operation of the vertical wire cutter according to the present embodiment. As shown in fig. 4, the working process of the present invention is as follows:

the first step is as follows: the robot takes out the vertical wire cutter tool, drives the screw rod 309 to rotate reversely, and drives the connecting rod 314 to move through the driving component 3, so that the movable knife 22 connected with the connecting rod 314 is driven to move, and the movable knife 22 is driven to move to the maximum opening limit of the fixed knife 21.

The second step is that: the robot sends the vertical wire cutter tool to the operation area and compares the wire cutting position. After the line shearing position is determined, the mechanical arm moves to enable the vertical line breaker to gradually approach the lead to be broken. And after the lead completely enters the working area of the shearing assembly of the vertical wire cutter, the robot stops moving.

The third step: the inner rod of the mechanical arm is driven to rotate to drive the screw rod 309 to rotate forwards, the driving component 3 drives the connecting rod 314 to move, so that the movable knife 22 connected with the connecting rod 314 is driven to move, the movable knife 22 is gradually closed with the fixed knife 21, and the wire breaking task is completed. Meanwhile, the upper clamping block 11 of the clamping assembly 1 is driven by the movable knife 22 to press down the lead, and the lower clamping block 12 and the upper clamping block 11 act together due to the reaction force of the rectangular spring 17 to press the lead to be broken, so that the clamping action is completed.

The fourth step: and the other mechanical arm repeats the second step and the third step to finish the shearing and clamping actions of the other end of the lead.

The fifth step: the two mechanical arms move together to bring the cut lead to a safe release area, the screw rod 309 is driven to rotate reversely, the clamping mechanism is loosened and the lead is discarded, and the operation of cutting off the drainage wire is completed.

Example two:

fig. 5 is an overall schematic view of a transverse wire cutter according to a second embodiment of the present invention. As shown in fig. 5, the transverse wire cutter according to the second embodiment of the present invention also includes a clamping assembly 1, a shearing assembly 2, a driving assembly 3, and a butt-joint assembly 4.

As shown in fig. 5, 6, 7 and 8, the clamping assembly 1, the shearing assembly 2 and the butting assembly 4 of the transverse wire cutter according to the second embodiment of the present invention are identical to the corresponding structures of the vertical wire cutter according to the first embodiment of the present invention, and the transverse wire cutter according to the second embodiment of the present invention is different from the transverse wire cutter according to the second embodiment of the present invention in the driving assembly 3.

As shown in fig. 5, 6, and 7, the driving assembly 3 of the transverse wire cutter according to the second embodiment of the present invention includes a transition support frame 301, a support base 302, a transmission shaft 304, a lead screw 309, a lead screw nut 312, and a connecting rod 314, wherein the transition support frame 301 is fixedly connected to the guide positioning plate 42 through a screw, the transmission shaft 304 is inserted into the transition support frame 301, two ends of the transmission shaft 304 are respectively installed in the transition support frame 301 through a deep groove ball bearing 305, the deep groove ball bearing 305 at the lower end of the transmission shaft 304 is attached to a shaft shoulder of the transmission shaft 304, and the deep groove ball bearing 305 is pressed tightly by the guide positioning plate 42; the lower end of the transmission shaft 304 passes through the guiding positioning plate 42 and the tool plate 41 and then is fixedly connected with a transmission pin 303, and the transmission pin 303 is butted with an insulating rod at the tail end of the mechanical arm so as to transmit torque.

The bracket base 302 is fixedly arranged on the transition support frame 301 through a screw, an opening is formed in the position of the bracket base corresponding to the transition support frame 301, the upper end of the transmission shaft 304 penetrates through the opening of the bracket base 302, and a small bevel gear 306 is fixedly arranged at the upper end of the transmission shaft 304 through a second flat key 323; a first supporting end 307 and a second supporting end 308 are fixedly installed at two ends of the bracket base 302 through screws respectively, second bushings 310 are arranged in the first supporting end 307 and the second supporting end 308, and two ends of a screw rod 309 are installed in the second bushings 310 through thrust ball bearings 311 respectively; a large bevel gear 315 is fixedly mounted on the screw rod 309 through a first flat key 322, the large bevel gear 315 is meshed with the small bevel gear 306, the torque of an insulating rod at the tail end of the mechanical arm is transmitted through the transmission pin 303, and the screw rod 309 is driven to rotate through the meshing matching of the small bevel gear 306 and the large bevel gear 315.

The feed screw nut 312 is arranged on the feed screw 309 in a matching way, a nut seat 313 is fixedly arranged on the feed screw nut 312, the feed screw nut 312 moves on the feed screw 309 along with the rotation of the feed screw 309, and therefore the nut seat 313 can move on the feed screw 309 along with the feed screw nut 312; the nut holder 313 is rotatably mounted with a connecting rod 314 by a shoulder screw 321.

In the present invention, guide rods 318 are respectively and fixedly mounted on the bracket holder 302 at both sides of the lead screw 309, guide holes 316 are respectively formed at corresponding positions on the nut holder 313, a third bushing 217 is arranged in the guide holes 316, the guide rods 318 are fitted in the guide holes 316 formed in the nut holder 313, and the nut holder 313 realizes the movement guide of the nut holder 313 by the fitting of the guide holes 316 and the guide rods 318.

As shown in fig. 5, the clamping assembly 1 includes an upper clamping block 11 and a lower clamping block 12, the upper clamping block 11 is fixedly mounted at the side of the blade of the stationary knife 22 by screws, a triangular seat 14 is fixedly mounted at the position of the side of the blade of the movable knife 21 corresponding to the upper clamping block 11 by screws, at least two guide posts 16 are fixedly mounted at the bottom of the triangular seat 14, rectangular springs 17 are sleeved outside the guide posts 16, the lower clamping block 12 is fixedly mounted at the tail ends of the guide posts 16 by screws, the lower clamping block 12 is provided with a clamping surface, and the clamping surface is in a V shape; the lower portion 12 is engaged with the upper clamp 11 to clamp the cable.

As shown in fig. 7, in the present embodiment, a clamping block 13 is fixedly mounted at the end of the movable blade 21 by screws, the clamping block 13 is provided with a clamping groove, the lower part of the clamping groove is fixedly connected with the end of the movable blade 21 by screws, and the upper part of the clamping groove is matched with the end of the fixed blade 22 when the movable blade 21 and the fixed blade 22 are sheared and attached, so as to press the movable blade 21 and the fixed blade 22 when they are sheared and overlapped.

Fig. 8 is a schematic diagram of a wire cutting operation of a transverse wire cutter according to a second embodiment of the present invention, as shown in fig. 8, the working process of the present invention is as follows:

the first step is as follows: the robot takes out the transverse wire cutter tool, drives the transmission shaft 304 to rotate reversely, drives the screw rod 309 to rotate reversely, and drives the connecting rod 314 to move through the driving assembly 3, so that the movable knife 22 connected with the connecting rod 314 is driven to move, and the movable knife 22 is driven to move to the maximum opening limit of the fixed knife 21.

The second step is that: the robot sends the transverse wire cutter tool to the operation area and compares the wire cutting position. After the line shearing position is determined, the mechanical arm moves to enable the transverse line cutter to gradually approach the lead to be cut. And after the lead completely enters the working area of the transverse wire cutter shearing assembly, the robot stops moving.

The third step: the inner rod of the mechanical arm is driven to rotate, the transmission shaft 304 is driven to rotate forwards, the screw rod 309 is driven to rotate forwards, and the connecting rod 314 moves through the driving component 3, so that the movable knife 22 connected with the connecting rod 314 is driven to move, the movable knife 22 is gradually closed with the fixed knife 21, and the wire breaking task is completed. The connecting rod 314 moves to drive the movable knife 22 connected with the connecting rod 314 to move, so that the movable knife 22 is gradually closed with the fixed knife 21 to complete the wire breaking task. Meanwhile, the lower clamping block 12 of the clamping assembly 1 moves along with the knife 22 to press the lead upwards. Due to the counterforce of the rectangular spring 17, the rectangular spring and the upper clamping block 11 act together to press the lead to be broken, and the clamping action is completed.

The fifth step: the two mechanical arms move together to bring the cut lead to a safe release area, the transmission shaft 304 is driven to rotate reversely, the screw rod 309 is driven to rotate reversely, and the clamping mechanism loosens and discards the lead. And finishing the operation of cutting the drainage wire.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are all within the protection scope of the present invention.

Claims

1. A wire breaker is characterized in that: the method comprises the following steps:

a cutting assembly for cutting the cable;

the butt joint assembly is butted with the tail end of the mechanical arm;

2. The wire breaker of claim 1, wherein: the butt joint assembly comprises a guiding positioning disc and a tool disc which are fixedly connected with each other, and a butt joint groove in butt joint with the tail end of the mechanical arm is formed in the center of the tool disc.

3. The wire breaker of claim 1, wherein: the shearing assembly comprises a movable cutter and a fixed cutter, the cutting edges of the movable cutter and the fixed cutter are in shearing fit, the fixed cutter is fixedly arranged on the driving assembly, and the middle part of the movable cutter is rotatably connected with a fixed cutter handle to form shearing fit; the driving assembly comprises a reciprocating motion mechanism which is connected with the tail end of the movable cutter and drives the movable cutter to rotate around the rotary connection part of the movable cutter and the fixed cutter; the reciprocating mechanism is in butt joint with the insulating rod at the tail end of the mechanical arm and is driven by the insulating rod at the tail end of the mechanical arm to do reciprocating motion.

4. The wire breaker of claim 3, wherein: the reciprocating mechanism comprises a screw rod, a screw rod nut is arranged on the screw rod in a matching mode, a support frame is fixedly arranged on the butt joint assembly, two ends of the screw rod are rotatably arranged on the support frame through bearings, a connecting rod is rotatably connected to the screw rod nut, and the tail end of the connecting rod is rotatably connected with the tail end of the movable cutter; the screw rod penetrates through the butt joint assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm through a transmission pin.

5. The wire breaker of claim 4, wherein: the sum of the length from the joint of the movable knife and the fixed knife handle to the end of the movable knife and the length of the connecting rod is greater than the distance from the joint of the movable knife and the fixed knife to the joint of the connecting rod and the screw nut.

6. The wire breaker of claim 4, wherein: a nut seat is fixedly arranged on the feed screw nut, and the connecting rod is rotationally connected with the nut seat; guide rods are respectively and fixedly arranged on the support frame at two sides of the screw rod, and corresponding guide holes are respectively arranged at corresponding positions on the nut seat; the nut seat is matched with the guide rod through the guide hole to realize the motion guide of the nut seat.

7. The wire breaker of claim 3, wherein: the clamping assembly comprises an upper clamping block and a lower clamping block, and the upper clamping block is fixedly arranged on the side surface of the moving knife body; the lower clamping block is fixedly arranged on the driving assembly and is positioned below the upper clamping block.

8. The wire breaker of claim 7, wherein: the driving assembly is fixedly provided with a triangular seat at a position below the upper clamping block, the bottom of the triangular seat is fixedly provided with at least two guide pillars, rectangular springs are sleeved outside the guide pillars, and the lower clamping block is fixedly arranged at the tail ends of the guide pillars.

9. The wire breaker of claim 3, wherein: the driving assembly further comprises a transition mechanism, the transition mechanism comprises a transition support frame fixedly connected with the butt joint assembly, a transmission shaft is rotatably mounted in the transition support frame through a bearing, and the transmission shaft penetrates through the butt joint assembly and is in butt joint with the insulating rod at the tail end of the mechanical arm through a transmission pin; the tail end of the transmission shaft drives the reciprocating motion mechanism to reciprocate through the matching of a gear.

10. The wire breaker of claim 9, wherein: the reciprocating mechanism comprises a screw rod, and the base is a screw rod nut; a bracket seat is fixedly arranged on the transition support frame, two ends of the screw rod are rotatably arranged on the bracket seat through bearings, the screw rod nut is arranged on the screw rod in a matched manner, and the connecting rod is rotatably connected with the screw rod nut;

11. The wire breaker of claim 9, wherein: the clamping assembly comprises an upper clamping block and a lower clamping block, and the upper clamping block is fixedly arranged on the side surface of the fixed cutter body; the lower clamping block is fixedly arranged on the side surface of the movable knife body and at the position corresponding to the upper clamping block.

12. The wire breaker of claim 11, wherein: the movable knife comprises a movable knife body and a lower clamping block, wherein a triangular seat is fixedly installed at a position, corresponding to the upper clamping block, on the side face of the movable knife body, at least two guide pillars are fixedly installed at the bottom of the triangular seat, rectangular springs are sleeved outside the guide pillars, and the lower clamping block is fixedly installed at the tail ends of the guide pillars.

13. The wire breaker according to claim 7 or 11, wherein: the clamping surfaces of the upper clamping block and the lower clamping block are both V-shaped.

14. The wire breaker of claim 3, wherein: the movable knife body is characterized by further comprising a clamping block, wherein a clamping groove is formed in the clamping block, the lower portion of the clamping groove is fixedly installed at the tail end of the movable knife body, and the upper portion of the clamping groove is matched with the tail end of the fixed knife body when the movable knife is sheared and attached to the fixed knife.