Cutting device for high-voltage line repairing robot

By designing a cutting device for high-voltage line repair robots, dynamic clamping and mechanical linkage technology are used to solve the problem of inaccurate cutting caused by cable shaking during cutting, achieving higher cutting accuracy and stability, and extending the service life of the robot.

CN119944502APending Publication Date: 2025-05-06STATE GRID HEBEI ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202510298211.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-13
Publication Date
2025-05-06

AI Technical Summary

Technical Problem

The existing high-altitude repair robots are prone to inaccurate cutting due to cable shaking when cutting cables, and the cutting mechanism is unreasonable and the control algorithm is inaccurate, resulting in large shaking, affecting the cutting quality and the service life of the robot.

Method used

A cutting device for high-voltage line repair robots is designed, including a housing, a fixed structure and a cutting structure. The cutting structure contacts the inclined surface of the support arm and the rotor, and uses dynamic clamping and mechanical linkage to offset the shaking caused by elasticity or external force of the cable; at the same time, the push rod drives the rotary ring and the locking rod to form a closed fixing hole to ensure that the cable is locked in multiple directions before cutting, eliminating the displacement risk at the moment of cutting.

Benefits of technology

It realizes dynamic clamping of the cable during the cutting process, effectively offsets the cable shaking, improves the accuracy and stability of cutting, ensures the flat cutting surface and extends the service life of the robot.

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Abstract

The invention relates to the technical field of high-altitude cable repair, in particular to a cutting device for a high-voltage line repair robot, comprising a shell, a fixing structure mounted on the shell and a cutting structure mounted in the shell; the cutting structure comprises mounting seats fixedly mounted on the shell, a spindle is fixedly mounted on the mounting seats, a rotating disc is rotatably mounted on the spindle, the mounting seats are arranged on the two sides of the rotating disc respectively, mounting columns are mounted on the mounting seats respectively, rotating wheels are rotatably mounted on the mounting columns respectively, and the rotating wheels are rotatably mounted on the rotating columns respectively. The rotating wheels are rotationally connected with the mounting column, a motor is mounted at one end of the main shaft, a supporting arm is mounted on the rotating disc, and a tool bit is arranged on the supporting arm. Therefore, by means of the cutting device for the high-voltage line repairing robot, the technical problem that when an existing high-altitude repairing robot is used for cutting, cutting often occurs, and consequently a cable shakes seriously can be solved.
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Description

Technical Field

[0001] The present application relates to the technical field of high-altitude cable repair, and more specifically, to a cutting device for a high-voltage line repair robot. Background Art

[0002] In the power, communications and other industries, cable maintenance and repair are crucial links. Traditional cable repair methods often require manual work, which is not only inefficient, but also poses extremely high safety risks when dealing with high-voltage, large-diameter or special environment cables. Therefore, the emergence of cable repair robots has brought revolutionary changes to this field.

[0003] Existing cable repair robots are able to automatically locate the fault point, perform necessary repair operations, and cut the cable after the repair is completed. However, despite the significant progress made in automation and intelligence, there are still some problems in the cable cutting process, especially the problem of inaccurate cutting caused by cable shaking during cutting.

[0004] When cutting cables, the shaking of the cables will not only affect the cutting accuracy, but also may cause the cutting surface to be uneven, or even damage the internal structure of the cable. This is mainly due to the lack of effective fixing and stable control of the cables by the robot during the cutting process. When the robot performs the cutting action, the cables often shake due to their own weight, elasticity or external environmental factors (such as wind).

[0005] In addition, existing cable repair robots often experience large shaking during cutting. This may be due to the unreasonable design of the robot's cutting mechanism or the inaccurate control algorithm during the cutting process. Excessive shaking will not only affect the cutting quality, but may also damage the robot itself and reduce its service life. Summary of the invention

[0006] Based on the above problems, the present application proposes a cutting device for a high-voltage line repair robot, which is used to solve the technical problem that existing high-altitude repair robots often encounter large cable shaking during cutting.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A cutting device for a high-voltage line repair robot comprises a housing, a fixing structure mounted on the housing, and a cutting structure mounted in the housing;

[0009] The cutting structure includes a mounting seat fixedly mounted with the shell, a main shaft is fixedly mounted on the mounting seat, a rotating disk is rotatably mounted on the main shaft, one mounting seat is respectively provided on both sides of the rotating disk, and a lifting structure is installed on each mounting seat, the lifting structure includes a shell mounted on the mounting seat, a power motor and a block are installed on the side wall of the shell, a rotating shaft is connected to the power output end of the power motor, the rotating shaft passes through the block, a rotating gear is arranged on the rotating shaft, a driven gear is meshed on the rotating gear, the driven gear is rotatably connected with the side wall of the shell, an eccentric rotating disk is connected to the rotating shaft of the driven gear, a pull rod is connected to the eccentric rotating disk, a clamp is hinged on the pull rod, one end of the clamp is hinged to the side wall of the shell, and the other end is hinged to the rotating shaft, the rotating shaft passes through the shell, a rotating wheel is rotatably mounted on the end of the rotating shaft, a first motor is installed at one end of the main shaft, a support arm is installed on the rotating disk, and a cutter head is arranged on the support arm.

[0010] In a specific feasible implementation scheme, a mounting groove is provided on the rotating disk, the support arm is mounted on the mounting groove, one end of the support arm is hinged to the mounting groove, two support arms are provided, the cutter head is installed at the other end of the support arm, a spring is provided between the two support arms, and the two ends of the spring are respectively fixedly connected to the inner sides of the two support arms.

[0011] In a specific possible implementation manner, each of the support arms abuts against the rotating wheel, and the surface where each of the support arms abuts against the rotating wheel is an inclined surface.

[0012] In a specific possible implementation scheme, a placement groove for placing cables is provided on the rotating disk, and a limit seat is provided on the rotating disk. The limit seats are respectively located beside the two support arms, and a limit screw is threaded through the limit seat.

[0013] In a specific possible implementation manner, the housing is provided with an opening for the cable to pass through.

[0014] In a specific possible implementation scheme, the fixed structure includes a mounting platform mounted on the shell, a mounting ring is fixedly mounted on the mounting platform, a swivel is rotatably mounted on the mounting ring, a push rod for rotating the swivel is mounted on the mounting platform, and a tail end of the push rod is hinged to the mounting platform.

[0015] In a specific possible implementation mode, swivel rings are provided on both sides of the mounting ring, a swivel rod is connected between the two mounting rings, and the power output end of the push rod is hinged to the swivel rod.

[0016] In a specific feasible implementation scheme, a first sliding ring and a second sliding ring are installed on one side of the mounting ring, and the first sliding ring and the second sliding ring are rotatably connected to the mounting ring. A first fixed ring and a second fixed ring are fixedly installed on one side of the rotating ring, and two of the first sliding ring, the second sliding ring, the first fixed ring and the second fixed ring are each provided.

[0017] In a specific feasible implementation scheme, a first locking rod is arranged between each of the first sliding rings and each of the first fixed rings, and a second locking rod is arranged between each of the second sliding rings and each of the second fixed rings, one end of each of the first locking rods is slidingly connected to each of the first sliding rings, the other end of each of the first locking rods is fixedly connected to each of the second fixed rings, one end of each of the second locking rods is slidingly connected to each of the second sliding rings, and the other end of each of the second locking rods is fixedly connected to each of the second fixed rings.

[0018] In a specific feasible implementation manner, a through hole for passing the cable is provided in the middle of the mounting ring, each second locking rod is located above each first locking rod, two second locking rods are arranged in parallel, two first locking rods are arranged in parallel, two second locking rods and two second locking rods are arranged crosswise to form a fixing hole for clamping the cable, and the fixing hole corresponds to the through hole.

[0019] Positive effects of the present invention:

[0020] The contact surface between the support arm and the rotating wheel is designed as an inclined surface. When the rotating disk rotates, the rotating wheel squeezes the inclined surface of the support arm, causing the two support arms to contract inward, and the elasticity of the spring is adaptively clamped to clamp the cable. This mechanical linkage realizes dynamic clamping during the cutting process, offsetting the shaking of the cable caused by elasticity or external force.

[0021] The push rod drives the swivel, which drives the cross-arranged first and second locking rods to form a closed fixing hole, and locks the cable in multiple directions before cutting, completely eliminating the risk of displacement at the moment of cutting.

[0022] The mounting ring, swivel and push rod on the mounting table together constitute the fixed structure of the cable. Through the pushing action of the push rod, the swivel can tightly clamp the cable, effectively preventing the cable from shaking during the cutting process.

[0023] The design of the first sliding ring, the second sliding ring, the first fixing ring, the second fixing ring and the corresponding locking rod further enhances the fixing effect of the cable, making the cable more stable during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of an embodiment of the present invention without the housing;

[0027] Figure 3 is a schematic structural diagram of a rotating disk according to an embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of a rotating disk in an embodiment of the present invention with part of the structure hidden;

[0029] Figure 5 is a schematic diagram of a structure in which a fixing structure according to an embodiment of the present invention is loosened;

[0030] Figure 6 It is a schematic diagram of the structure of locking the fixed structure according to an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the lifting structure and the cooperation of the rotating disk in the embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the lifting structure retracting and the rotating disk cooperating in the embodiment of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the lifting structure of the embodiment of the present invention being retracted;

[0034] Fig.10 It is a schematic structural diagram of the lifting structure of an embodiment of the present invention;

[0035] Reference numerals

[0036] 1. Shell; 2. Mounting seat; 3. Spindle; 4. Rotating disk; 6. Rotating wheel; 7. First motor; 8. Support arm; 9. Cutter head; 10. Mounting slot; 11. Spring; 12. Placement slot; 13. Limit seat; 15. Limit screw; 16. Opening; 17. Mounting table; 18. Mounting ring; 19. Rotating ring; 20. Push rod; 21. Rotating rod; 22. First sliding ring; 23. Second sliding ring; 24. First fixed ring; 25. Second fixed ring; 26. First locking rod; 27. Second locking rod; 28. Shell; 29. ​​Power motor; 30. Block; 31. Rotating shaft; 32. Rotating gear; 33. Driven gear; 34. Eccentric rotating disk; 35. Pull rod; 36. Clamp. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Example 1

[0039] like Figure 1-5 As shown, a cutting device for a high-voltage line repair robot comprises a housing 11, and the housing 11 is provided with an opening 16 for the cable to pass through. A fixing structure installed on the housing 11 and a cutting structure installed in the housing 11;

[0040] The cutting structure includes a mounting seat 22 fixedly mounted on the shell 11, a main shaft 3 is fixedly mounted on the mounting seat 22, a rotating disk 4 is rotatably mounted on the main shaft 3, one mounting seat 22 is respectively provided on both sides of the rotating disk 4, and a lifting structure is installed on each mounting seat 22, and the lifting structure controls the rotating wheel 6 to abut against the supporting arm 8. When cutting is required, the rotating wheel 6 is raised by the lifting structure, and when cutting is not required, the rotating wheel 6 is retracted by the lifting structure. The lifting structure includes a shell 28 mounted on the mounting seat 22, a power motor 29 and a block 30 are installed on the side wall of the shell 28, and a rotating shaft 31 is connected to the power output end of the power motor 29. The rotating shaft 31 passes through the block 30, and a rotating gear 32 is provided on the rotating shaft 31, and a driven gear 33 is meshed on the rotating gear 32, and the driven gear 33 is rotatably connected to the side wall of the housing 28, and an eccentric rotating disk 34 is connected to the rotating shaft 31 of the driven gear 33, and a pull rod 35 is connected to the eccentric rotating disk 34, and a clamping claw 36 is hinged on the pull rod 35, and one end of the clamping claw 36 is hinged to the side wall of the housing 28 and the other end is hinged to the rotating shaft 31, and the rotating shaft 31 passes through the housing 28, and a rotating wheel 6 is rotatably installed at the end of the rotating shaft 31, and a first motor 7 is installed at one end of the main shaft 3, and a support arm 8 is installed on the rotating disk, and a cutter head 9 is arranged on the support arm 8. The gear set and the eccentric rotating disk 34 are driven by the power motor 29, and the linkage pull rod 35 controls the lifting of the rotating wheel 6. The mechanical linkage structure has fast response and high reliability, avoiding the risk of leakage in traditional hydraulic / pneumatic systems. At the same time, the lifting structure uses a driven gear 33 and an eccentric turntable 34 to transmit force, which can minimize the vibration of the robot and achieve a more linear power output.

[0041] The rotating disk 4 is provided with a mounting groove 10, and the support arm 8 is mounted on the mounting groove 10. One end of the support arm 8 is hinged to the mounting groove 10. Two support arms 8 are provided, and the cutter head 9 is installed at the other end of the support arm 8. A spring 11 is provided between the two support arms 8, and the two ends of the spring 11 are fixedly connected to the inner sides of the two support arms 8 respectively.

[0042] Each of the support arms 8 is in contact with the rotating wheel 6 , and the surface where each of the support arms 8 and the rotating wheel 6 are in contact is an inclined surface.

[0043] The rotating disk 4 is provided with a placement groove 12 for placing cables, and the rotating disk 4 is provided with a limit seat 13, which is respectively located beside the two supporting arms 8, and the limit screw 15 is threadedly penetrated on the limit seat 13.

[0044] Example 2

[0045] The difference between this embodiment and the above embodiment is that the power part of the cutting structure is described in more detail, and the fixed structure includes a mounting platform 17 mounted on the housing 1, a mounting ring 18 is fixedly mounted on the mounting platform 17, a swivel 19 is rotatably mounted on the mounting ring 18, a push rod 20 for rotating the swivel 19 is mounted on the mounting platform 17, and the tail of the push rod 20 is hinged to the mounting platform 17. The mounting platform 17 provides a stable support foundation for the power part of the entire fixed structure, and the mounting ring 18 serves as a rotating bracket for the swivel 19, and the two together ensure the stability and reliability of the fixed structure.

[0046] A swivel 19 is provided on both sides of the mounting ring 18, a rotating rod 21 is connected between the two mounting rings 18, and a power output end of the push rod 20 is hinged to the rotating rod 21. The push rod 20 transmits force to the swivel 19 through the rotating rod 21, thereby providing power for cable fixing.

[0047] Example 3

[0048] This embodiment describes the principle of fixing the cable in more detail. Figure 4-5 As shown, a first sliding ring 22 and a second sliding ring 23 are installed on one side of the mounting ring 18, and the first sliding ring 22 and the second sliding ring 23 are rotatably connected to the mounting ring 18. A first fixing ring 24 and a second fixing ring 25 are fixedly installed on one side of the rotating ring 19, and two of each of the first sliding ring 22, the second sliding ring 23, the first fixing ring 24 and the second fixing ring 25 are provided. The other side of the mounting ring 18 and the rotating ring 19 has a similar structure, except for the different installation positions, which will not be described in more detail here.

[0049] A first locking rod 26 is arranged between each first sliding ring 22 and each first fixed ring 24, and a second locking rod 27 is arranged between each second sliding ring 23 and each second fixed ring 25. One end of each first locking rod 26 is slidingly connected to each first sliding ring 22, and the other end of each first locking rod 26 is fixedly connected to each second fixed ring 25. One end of each second locking rod 27 is slidingly connected to each second sliding ring 23, and the other end of each second locking rod 27 is fixedly connected to each second fixed ring 25.

[0050] A through hole for passing the cable is provided in the middle of the mounting ring 18, each of the second locking rods 27 is located above each of the first locking rods 26, two of the second locking rods 27 are arranged in parallel, two of the first locking rods 26 are arranged in parallel, two of the second locking rods 27 and two of the second locking rods 27 are arranged crosswise to form a fixing hole for clamping the cable, and the fixing hole corresponds to the through hole. The two second locking rods 27 and the two first locking rods 26 are arranged crosswise to form a fixing hole for clamping the cable, and this design not only improves the firmness of the cable fixation, but also enables the fixing hole to adapt to cables of different diameters, thereby enhancing the versatility and practicality of the cutting structure.

[0051] The first locking rod 26 and the second locking rod 27 are both provided with anti-skid rubber pads to ensure that the cables are fixed while also preventing them from being scratched.

[0052] When the push rod 20 is extended, it drives the swivel 19 to rotate, and the first fixed ring 24 and the second fixed ring 25 rotate along with the swivel 19. Since the mounting ring 18 does not rotate, the distance between each first fixed ring 24 and each first sliding ring 22 becomes smaller, and the distance between each second fixed ring 25 and each second sliding ring 23 becomes smaller, so that the distance between the two first locking rods 26 is closer and the distance between the two second locking rods 27 are closer to each other, and the two first locking rods 26 and the two second locking rods 27 form a double fixation for the cable.

[0053] How it works

[0054] Working principle of fixed structure:

[0055] The push rod 20 transmits force to the swivel 19 through the rotating rod 21, driving the swivel 19 to rotate on the mounting ring 18.

[0056] The first fixed ring 24 and the second fixed ring 25 on the rotating ring 19 rotate accordingly. Since the mounting ring 18 is fixed, the distance between the first fixed ring 24 and the first sliding ring 22, and the distance between the second fixed ring 25 and the second sliding ring 23 gradually decreases.

[0057] The first locking rod 26 and the second locking rod 27 are driven by the sliding ring and the fixing ring to move closer to each other, thereby forming a double fixation for the cable.

[0058] Working principle of cutting structure:

[0059] The first motor 7 drives the main shaft 3 to rotate, and the rotating disk 4 on the main shaft 3 rotates accordingly.

[0060] The support arm 8 on the rotating disk 4 is connected to the rotating disk 4 in an articulated manner, and the elastic effect of the spring 11 is cooperated to enable the cutter head 9 to fit closely and cut the cable.

[0061] The design of the inclined surface of the rotating wheel 6 and the support arm 8 enables the rotating wheel 6 to push the support arm 8 to apply shear force to the cable during rotation, thereby achieving efficient cutting. The inclined support arm 8 and the rotating wheel 6 roll together to reduce the friction coefficient, making the unfolding action of the support arm 8 smoother.

[0062] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cutting device for a high-voltage line repair robot, characterized in that: It comprises a shell (1), a fixing structure installed on the shell (1), and a cutting structure installed in the shell (1); The cutting structure comprises a mounting seat (2) fixedly mounted on the shell (1), a main shaft (3) fixedly mounted on the mounting seat (2), a rotating disk (4) rotatably mounted on the main shaft (3), one mounting seat (2) is respectively provided on both sides of the rotating disk (4), and a lifting structure is installed on each mounting seat (2), the lifting structure comprises a shell (28) mounted on the mounting seat, a power motor (29) and a clamping block (30) are installed on the side wall of the shell (28), a rotating shaft (31) is connected to the power output end of the power motor (29), the rotating shaft (31) passes through the clamping block (30), a rotating gear (32) is provided on the rotating shaft (31), and a driven gear (33) is meshed with the rotating gear (32).

2. A cutting device for a high voltage line repair robot according to claim 1, characterized in that: The rotating disk (4) is provided with a mounting groove (10), the support arm (8) is rotatably mounted on the mounting groove (10), one end of the support arm (8) is hinged to the mounting groove (10), two support arms (8) are provided, the cutter head (9) is mounted on the other end of the support arm (8), a spring (11) is provided between the two support arms (8), and the two ends of the spring (11) are respectively fixedly connected to the inner sides of the two support arms (8).

3. The cutting device for a high-voltage line repair robot according to claim 1, characterized in that: The driven gear (33) is rotatably connected to the side wall of the housing (28); an eccentric rotating disk (34) is connected to the rotating shaft (31) of the driven gear (33); a pull rod (35) is connected to the eccentric rotating disk (34); a clamping claw (36) is hinged on the pull rod (35); one end of the clamping claw (36) is hinged to the side wall of the housing (28) and the other end is hinged to the rotating shaft (31); the rotating shaft (31) passes through the housing (28); a rotating wheel (6) is rotatably mounted on the end of the rotating shaft (28); a first motor (7) is mounted on one end of the main shaft (3); a support arm (8) is mounted on the rotating disk; a cutter head (9) is arranged on the support arm (8); each support arm (8) is in contact with the rotating wheel (6); and the surface where each support arm (8) contacts with each rotating wheel (6) is an inclined surface.

4. The cutting device for a high-voltage line repair robot according to claim 1, characterized in that: The rotating disk (4) is provided with a placement groove (12) for placing cables, and the rotating disk (4) is provided with a limit seat (13), the limit seat (13) is respectively located beside the two support arms (8), and the limit screw (15) is threadedly penetrated on the limit seat (13).

5. The cutting device for a high-voltage line repair robot according to claim 1, characterized in that: The housing (1) is provided with an opening (16) for the cable to pass through.

6. The cutting device for a high-voltage line repair robot according to claim 1, characterized in that: The fixed structure comprises a mounting platform (17) mounted on the housing (1), a mounting ring (18) being fixedly mounted on the mounting platform (17), a swivel (19) being rotatably mounted on the mounting ring (18), a push rod (20) for rotating the swivel (19) being mounted on the mounting platform (17), and a rear end of the push rod (20) being hinged to the mounting platform (17).

7. A cutting device for a high voltage line repair robot according to claim 6, characterized in that: A rotating ring (19) is provided on both sides of the mounting ring (18), a rotating rod (21) is connected between the two mounting rings (18), and a power output end of the push rod (20) is hinged to the rotating rod (21).

8. The cutting device for a high-voltage line repair robot according to claim 6, characterized in that: A first sliding ring (22) and a second sliding ring (23) are installed on one side of the mounting ring (18), and the first sliding ring (22) and the second sliding ring (23) are rotatably connected to the mounting ring (18). A first fixing ring (24) and a second fixing ring (25) are fixedly installed on one side of the rotating ring (19), and two of each of the first sliding ring (22), the second sliding ring (23), the first fixing ring (24) and the second fixing ring (25) are provided.

9. The cutting device for a high-voltage line repair robot according to claim 8, characterized in that: A first locking rod (26) is provided between each of the first sliding rings (22) and each of the first fixing rings (24), and a second locking rod (27) is provided between each of the second sliding rings (23) and each of the second fixing rings (25). One end of each of the first locking rods (26) is slidably connected to each of the first sliding rings (22), and the other end of each of the first locking rods (26) is fixedly connected to each of the second fixing rings (25). One end of each of the second locking rods (27) is slidably connected to each of the second sliding rings (23), and the other end of each of the second locking rods (27) is fixedly connected to each of the second fixing rings (25).

10. A cutting device for a high voltage line repair robot according to claim 9, characterized in that: A through hole for passing a cable is arranged in the middle of the mounting ring (18); each second locking rod (27) is located above each first locking rod (26); two second locking rods (27) are arranged in parallel with each other; two first locking rods (26) are arranged in parallel with each other; two second locking rods (27) and two second locking rods (27) are arranged crosswise to form a fixing hole for clamping a cable; and the fixing hole corresponds to the through hole.