Symmetrical double-tool-bit screw-in type automatic wire peeler

Abstract

The invention discloses a symmetrical double-tool-bit screw-in type automatic wire stripper which comprises a turnover emergency unlocking module, the turnover emergency unlocking module comprises a turnover fixing plate I and a turnover fixing plate II which are fixedly connected, and a cavity is formed between the turnover fixing plate I and the turnover fixing plate II. A turnover motor is fixedly connected to the exterior of the first turnover fixing plate, the turnover motor is sleeved with a turnover motor cover, and an output shaft of the turnover motor extends into the cavity and is provided with a turnover gear transmission assembly; the clamping and tool adjusting module comprises a clamping structure and a tool adjusting structure; the clamping structure comprises a first clamping flange and a second clamping flange. The device has the advantages that the double-stripping-knife design is adopted, the stripping problem of a thick insulating layer is solved, the fault and maintenance cost is reduced, the hot-line work efficiency is improved, the operation safety is improved through multiple structures, and remarkable benefit improvement is brought to electric power work.

Description

Technical Field

[0001] The invention relates to the technical field of electric power operation, in particular to a symmetrical double-blade screw-in type automatic wire stripper. Background Art

[0002] At present, in the field of power operations, especially in the process of stripping the insulation layer of overhead insulated wires, commonly used wire stripping devices include handheld wire strippers, manual insulation rod wire strippers, and automatic wire strippers. Among them, the automatic wire stripper is the most convenient to use.

[0003] In order to meet different power transmission requirements, the power sector uses different insulated overhead cables. Currently, the commonly used insulated overhead cables are divided into 35mm 2 , 50mm 2 , 70mm 2 、95mm 2 , 120mm 2 , 150mm 2 、185mm 2 and 240mm 2 Each specification of insulated overhead cable has a variety of thicknesses of insulation layer. Usually, when the thickness of the insulation layer exceeds 5mm, the current automatic wire stripping cannot be used for power operations. The reason is that the resistance of the stripping knife of the automatic wire stripper increases exponentially with the thickness of the insulation layer. When the automatic wire stripper strips the insulation layer of the insulated overhead cable with a thickness of more than 5mm, the resistance is too large. In the least, the stripping blade is damaged. In the worst case, the automatic wire stripper is damaged and cannot be removed from the wire or the insulated overhead cable is twisted off, affecting work efficiency and wasting manpower and material resources.

[0004] Therefore, we propose a symmetrical double-blade screw-in automatic wire stripper to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a symmetrical double-blade screw-in type automatic wire stripper.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A symmetrical double-blade screw-in automatic wire stripper, comprising:

[0008] A flip emergency unlocking module, the flip emergency unlocking module comprises a flip fixing plate 1 and a flip fixing plate 2 which are fixedly connected, a cavity is formed between the flip fixing plate 1 and the flip fixing plate 2, a flip motor is fixedly connected to the outside of the flip fixing plate 1, a flip motor cover is provided on the outer cover of the flip motor, an output shaft of the flip motor extends into the cavity and is installed with a flip gear transmission assembly;

[0009] A clamping and tool-adjusting module, wherein the clamping and tool-adjusting module comprises a clamping structure and a tool-adjusting structure;

[0010] The clamping structure includes a clamping rib 1 and a clamping rib 2, a fixed clamping shaft and a clamping screw are installed between the clamping rib 1 and the clamping rib 2, a clamping block 1 and a clamping block 2 are symmetrically installed on the clamping screw, a clamping motor is installed on the clamping rib 1, and the output shaft of the clamping motor drives the clamping screw to rotate through the clamping gear transmission assembly, thereby controlling the clamping block 1 and the clamping block 2 to move toward each other.

[0011] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, the knife adjustment structure includes a knife adjustment rib, a knife adjustment shaft and a knife adjustment screw are fixedly installed on both sides of the clamping block and the knife adjustment rib, a knife feed movable part is installed on the knife adjustment screw, and a set of the knife feed movable part is arranged on the knife adjustment shaft, a knife seat is fixedly connected to the knife feed movable part, and a stripping knife, an infrared sensor and a knife adjustment limit sensor are installed on the knife seat;

[0012] A knife adjusting motor fixing part 1 is fixedly connected to the knife adjusting retaining edge 1, a knife adjusting motor 1 is installed on the knife adjusting motor fixing part 1, and the knife adjusting motor 1 is connected to the knife adjusting screw rod 1.

[0013] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, the knife adjustment structure includes two knife adjustment ribs, two knife adjustment shafts and two knife adjustment screws are fixedly installed on both sides of the clamping block one and the knife adjustment rib two, two knife feed movable parts are installed on the two knife adjustment screws, and the two knife feed movable parts are sleeved on the two knife adjustment shafts, the two knife feed movable parts are fixedly connected to the two knife seats, and the two knife seats are installed with two stripping knives, two infrared sensors and two knife adjustment limit sensors;

[0014] The second knife adjusting retaining edge is fixedly connected with the second knife adjusting motor fixing part, the second knife adjusting motor is installed on the second knife adjusting motor fixing part, and the second knife adjusting motor is connected with the second knife adjusting screw rod.

[0015] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, the flip gear transmission assembly includes a flip driven gear and two transmission gears, and the flip driven gear and the two transmission gears are installed in the cavity, and the transmission gear and the flip driven gear are meshed, and the flip driven gear is connected to a gear bridge, the output shaft of the flip motor extends into the cavity and is installed with a flip driving gear, and the flip driven gear and the gear bridge are both meshed with the flip driving gear.

[0016] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, two ratchets are symmetrically installed on the end face of the flip driven gear, a ratchet is opened on the second flip fixed plate, and each ratchet is engaged with the ratchet, and an emergency unlocking pull ring is installed on the flip driven gear.

[0017] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, the clamping gear transmission assembly includes a clamping driving gear, and the clamping driving gear is installed on the output shaft of the clamping motor, and a clamping driven gear is installed on the clamping screw rod, and the clamping driving gear is meshed with the clamping driven gear.

[0018] In the above-mentioned symmetrical double-blade screw-in automatic wire stripper, a clamping limit sensor is fixedly connected to the clamping rib one, and a clamping trigger member is fixedly connected to the clamping block one. When the clamping trigger member triggers the clamping limit sensor, the clamping block one and the clamping block two open to the maximum angle, a trigger steel sheet and a clamping state sensor are fixedly connected to the clamping block two. The trigger steel sheet triggers the clamping state sensor, and the clamping block one and the clamping block two clamp the wire.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The clamping knife module of this device adopts a unique double stripping knife design. One knife opens upward and the other knife opens downward to strip at the same time, which can divide the thickness of the wire insulation layer into two. The thickness of the insulation layer stripped by the double knife is half of that of the single knife, which greatly reduces the resistance of the stripping knife during stripping, so that when the stripping operation of the wire insulation layer thickness of 5mm and above is carried out, the task can be completed smoothly, effectively solving the problem that the existing stripper cannot work.

[0021] 2. It overcomes the obstacle of stripping thick insulation layer, avoids the frequent damage of stripping knife and stripper body due to too thick insulation layer, greatly reduces the failure rate of stripper, and accordingly reduces the manpower, material and financial costs caused by repairing or replacing damaged parts, extends the service life of stripper, and improves the overall economy of equipment.

[0022] 3. The double-blade screw-in automatic stripping device cooperates with the clamping structure to quickly and stably clamp the wire, the flip unit to flexibly adjust the stripping position, and the blade adjustment structure to accurately control the stripping depth. All links work closely together, greatly shortening the time required for stripping operations and significantly improving the work efficiency of live operations, so that power operations can be carried out more smoothly, reducing power outages and ensuring the stability of power supply.

[0023] 4. The double stripping knife structure reduces the force on the stripping knife, reducing the risk of injury due to excessive force on the knife blade. At the same time, the clamping structure ensures that the wire is firmly fixed during the stripping process to avoid accidents caused by wire shaking. In addition, the precise control of the flip unit and the knife adjustment structure prevents safety hazards such as line short circuit caused by excessive stripping and damage to the wire core, and comprehensively guarantees the personal safety of operators and the safe operation of the power system.

[0024] In summary, the present invention adopts a double stripping knife design to solve the problem of stripping thick insulation layers, reduce failure and maintenance costs, improve the efficiency of live operations, and also improve operational safety through a variety of structures, bringing significant benefit improvements to power operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a symmetrical double-blade screw-in type automatic wire stripper and an insulating rod in connection with each other;

[0026] Figure 2 This is a schematic diagram of the structure of a symmetrical double-blade screw-in type automatic wire stripper proposed by the present invention;

[0027] Figure 3 for Figure 2 The main view;

[0028] Figure 4 This is a partial structural schematic diagram of a flip emergency unlocking module in a symmetrical double-blade screw-in type automatic wire stripper proposed by the present invention;

[0029] Figure 5 This is a structural schematic diagram of a second flip fixing plate in a symmetrical double-blade screw-in type automatic wire stripping device proposed by the present invention;

[0030] Figure 6 It is a structural schematic diagram of a clamping structure in a clamping and adjusting knife module in a symmetrical double-knife head screw-in type automatic wire stripping device proposed by the present invention;

[0031] Figure 7 The present invention provides a schematic structural diagram of a knife adjusting structure in a clamping knife adjusting module of a symmetrical double-knife head screw-in type automatic wire stripper.

[0032] In the figure: 1 insulating rod, 2 insulating rod fixing part, 3 battery, 4 battery holder, 5 electric board box, 6 switch, 7 flip motor, 8 flip motor cover, 9 flip fixing plate 1, 10 flip fixing plate 2, 11 flip driving gear, 12 flip driven gear, 13 gear bridge, 14 ratchet, 15 emergency unlocking pull ring, 16 transmission gear, 17 clamping block 1, 18 clamping block 2, 19 clamping screw, 20 clamping screw nut, 21 clamping shaft, 22 clamping rib 1, 23 clamping rib 2, 24 clamping motor, 25 clamping driving gear, 26 clamping driven gear, 27 clamping limit sensor , 28 clamping trigger, 29 trigger steel sheet, 30 clamping state sensor, 31 feed movable part 1, 32 feed movable part 2, 33 knife adjusting screw rod 1, 34 knife adjusting screw rod 2, 35 knife holder 1, 36 knife holder 2, 37 peeling knife 1, 38 peeling knife 2, 39 infrared sensor 1, 40 infrared sensor 2, 41 knife adjusting limit sensor 1, 42 knife adjusting limit sensor 2, 43 knife adjusting shaft 1, 44 knife adjusting shaft 2, 45 knife adjusting side guard 1, 46 knife adjusting side guard 2, 47 knife adjusting motor 1, 48 knife adjusting motor 2, 49 knife adjusting motor fixing part 1, 50 knife adjusting motor fixing part 2. DETAILED DESCRIPTION

[0033] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0034] Example

[0035] Reference Figure 1-7 , a symmetrical double-blade screw-in automatic wire stripper, comprising

[0036] The flip emergency unlocking module comprises a flip fixing plate 1 9 and a flip fixing plate 2 10 which are fixedly connected. An insulating rod fixing piece 2 is installed on the flip fixing plate 2 10. An insulating rod 1 is inserted into the insulating rod fixing piece 2. A cavity is formed between the flip fixing plate 1 9 and the flip fixing plate 2 10. A flip motor 7 is fixedly connected to the outside of the flip fixing plate 1 9. A flip motor cover 8 is provided on the outer cover of the flip motor 7. The output shaft of the flip motor 7 extends into the cavity and is installed with a flip gear transmission assembly. The flip gear transmission assembly comprises a flip driven gear 12 and two transmission gears 16. The flip driven gear 12 and the two transmission gears 16 are installed in the cavity. The transmission gear 16 is meshed with the flip driven gear 12. The flip driven gear 12 is connected to the flip driven gear 12. There is a gear bridge 13, the output shaft of the flip motor 7 extends into the cavity and is installed with a flip driving gear 11, and the flip driven gear 12 and the gear bridge 13 are meshed with the flip driving gear 11, and two ratchets 14 are symmetrically installed on the end face of the flip driven gear 12, and a ratchet is provided on the flip fixing plate 10, and each ratchet 14 is meshed with the ratchet, and an emergency unlocking pull ring 15 is installed on the flip driven gear 12. By pulling the emergency unlocking pull ring 15, the two ratchets 14 installed on the flip driven wheel 12 can be meshed between the ratchets on the flip fixing plate 10, and then the flip fixing plate 10 can be rotated, so as to realize the function that the flip module can also operate when the flip motor 7 is not working, so as to cope with special situations and ensure the emergency operation needs of the peeler.

[0037] A clamping and tool-adjusting module, which includes a clamping structure and a tool-adjusting structure;

[0038] The clamping structure includes a clamping rib 1 22 and a clamping rib 23, a fixed clamping shaft 21 and a clamping screw 19 are installed between the clamping rib 1 22 and the clamping rib 23, a clamping block 17 and a clamping block 2 18 are symmetrically installed on the clamping screw 19, a clamping motor 24 is installed on the clamping rib 1 22, the output shaft of the clamping motor 24 drives the clamping screw 19 to rotate through the clamping gear transmission assembly to control the clamping block 17 and the clamping block 2 18 to move toward each other, the clamping gear transmission assembly includes a clamping driving gear 25, and the clamping driving gear 25 is installed on the output shaft of the clamping motor 24, a clamping driven gear 26 is installed on the clamping screw 19, and the clamping driving gear 25 is meshed with the clamping driven gear 26;

[0039] A clamping limit sensor 27 is fixedly connected to the clamping rib 22, and a clamping trigger member 28 is fixedly connected to the clamping block 17. When the clamping trigger member 28 triggers the clamping limit sensor 27, the clamping block 17 and the clamping block 2 18 open to the maximum angle, a trigger steel sheet 29 and a clamping state sensor 30 are fixedly connected to the clamping block 2 18. The trigger steel sheet 29 triggers the clamping state sensor 30, and the clamping block 17 and the clamping block 2 18 clamp the wire.

[0040] The knife adjusting structure comprises a knife adjusting rib 45, a knife adjusting shaft 43 and a knife adjusting screw rod 33 are fixedly installed on both sides of the clamping block 18 and the knife adjusting rib 45, a knife feed movable part 31 is installed on the knife adjusting screw rod 33, and the knife feed movable part 31 is sleeved on the knife adjusting rib 43, a knife seat 35 is fixedly connected to the knife feed movable part 31, and a peeling knife 37, an infrared sensor 39 and a knife adjusting limit sensor 41 are installed on the knife seat 35; a knife adjusting motor fixing part 49 is fixedly connected to the knife adjusting rib 45, a knife adjusting motor 47 is installed on the knife adjusting motor fixing part 49, and the knife adjusting motor 47 is connected to the knife adjusting screw rod 33;

[0041] The knife adjusting structure includes a knife adjusting rib 46, a knife adjusting shaft 44 and a knife adjusting screw rod 34 are fixedly installed on both sides of the clamping block 17 and the knife adjusting rib 46, a knife feeding movable part 32 is installed on the knife adjusting screw rod 34, and the knife feeding movable part 32 is sleeved on the knife adjusting shaft 44, a knife seat 36 is fixedly connected to the knife feeding movable part 32, and a peeling knife 38, an infrared sensor 40 and a knife adjusting limit sensor 42 are installed on the knife seat 36;

[0042] The knife adjusting retaining edge 46 is fixedly connected with a knife adjusting motor fixing part 50, and the knife adjusting motor fixing part 50 is installed with a knife adjusting motor 48, and the knife adjusting motor 48 is connected with the knife adjusting screw rod 34.

[0043] When the double-blade screw-in automatic wire stripper is in the non-working state, the clamping trigger 28 triggers the clamping limit sensor 27. At this time, the clamping block 17 and the clamping block 2 18 are at the maximum opening distance to facilitate the placement of the wire into the stripper. At the same time, the knife adjusting baffle 1 45 and the knife adjusting baffle 2 46 trigger the knife adjusting limit sensor 1 41 and the knife adjusting limit sensor 2 42. The stripping knife 1 37 and the stripping knife 2 38 are in the initial position, away from the wire, ready for the subsequent stripping operation.

[0044] First, install the insulating rod 1 and the insulating rod fixing 2, open the gear bridge 13, and put the wire to be stripped into the stripper. Then start the clamping motor 24, and the output shaft of the clamping motor 24 drives the clamping screw 19 to rotate through the clamping gear transmission assembly. Since the clamping block 17 and the clamping block 2 18 are symmetrically installed on the clamping screw 19, the rotation of the clamping screw 19 will cause the clamping block 17 and the clamping block 2 18 to move toward each other, and they move along the clamping shaft 21 to clamp the wire. When the trigger steel sheet 29 on the clamping block 2 18 triggers the clamping state sensor 30, it indicates that the wire has been firmly clamped, providing stable support for the subsequent stripping operation.

[0045] After the wire is clamped, the flip motor 7 is started, and its output shaft drives the flip unit to rotate through the flip gear transmission assembly to adjust the stripper to a suitable position and angle, and at the same time, the knife adjusting motor 47 and the knife adjusting motor 48 are started. The knife adjusting motor 47 is installed on the knife adjusting motor fixing part 49 and is connected to the knife adjusting screw rod 33, and the knife adjusting motor 48 is installed on the knife adjusting motor fixing part 50 and is connected to the knife adjusting screw rod 34. The knife adjusting motor 47 controls the knife adjusting screw rod 33 to rotate, so that the feed movable part 31 moves along the knife adjusting shaft 43, and then drives the knife seat 35 to move toward the direction of the wire, so that the stripping knife 37 gradually approaches the insulating layer; similarly, the knife adjusting motor 48 controls the knife adjusting screw rod 34 to rotate, so that the feed movable part 32 moves along the knife adjusting shaft 44, drives the knife seat 36 to move, and the stripping knife 38 also gradually approaches the insulating layer.

[0046] With the continuous operation of the knife adjusting motor 1 47 and the knife adjusting motor 2 48, the stripping knife 1 37 and the stripping knife 2 38 continuously approach the insulating layer and cut into the insulating layer to start the stripping operation. During the stripping process, the infrared sensor 1 39 and the infrared sensor 2 40 play a role. They are respectively installed on the knife holder 1 35 and the knife holder 2 36 to detect the distance between the stripping knife 1 37 and the stripping knife 2 38 and the wire core. When the infrared sensor 1 39 or the infrared sensor 2 40 detects the fluctuation of the wire core, it indicates that the stripping knife has approached the wire core. At this time, the knife adjusting motor 1 47 or the knife adjusting motor 2 48 stops rotating to avoid damaging the wire core, thereby accurately controlling the stripping depth and completing the stripping operation.

[0047] This symmetrical double-blade screw-in automatic wire stripper achieves efficient and accurate stripping of the wire insulation layer through the above-mentioned working process. It uses a double stripping knife structure (stripping knife 1 37 and stripping knife 2 38) to divide the thickness of the wire insulation layer into two, reducing the resistance of the stripping knife and improving the stripping efficiency and safety. At the same time, the flip unit can flexibly adjust the position and angle of the stripper, the clamping structure ensures the stability of the wire during the stripping process, and the sensor ensures the accurate control of the stripping operation. All components work together to complete the entire stripping process.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A symmetrical double-blade screw-in automatic wire stripper, characterized in that: The invention comprises a flip emergency unlocking module, wherein the flip emergency unlocking module comprises a flip fixing plate 1 (9) and a flip fixing plate 2 (10) which are fixedly connected, a cavity is formed between the flip fixing plate 1 (9) and the flip fixing plate 2 (10), a flip motor (7) is fixedly connected to the outside of the flip fixing plate 1 (9), a flip motor cover (8) is provided on the outer cover of the flip motor (7), an output shaft of the flip motor (7) extends into the cavity and is provided with a flip gear transmission assembly; A clamping and tool-adjusting module, wherein the clamping and tool-adjusting module comprises a clamping structure and a tool-adjusting structure; The clamping structure comprises a clamping rib 1 (22) and a clamping rib 2 (23), a fixed clamping shaft (21) and a clamping screw (19) are installed between the clamping rib 1 (22) and the clamping rib 2 (23), a clamping block 1 (17) and a clamping block 2 (18) are symmetrically installed on the clamping screw (19), a clamping motor (24) is installed on the clamping rib 1 (22), and the output shaft of the clamping motor (24) drives the clamping screw (19) to rotate through a clamping gear transmission assembly, thereby controlling the clamping block 1 (17) and the clamping block 2 (18) to move toward each other.

2. A symmetrical double-blade screw-in automatic wire stripper according to claim 1, characterized in that: The knife adjusting structure comprises a knife adjusting retaining edge (45), a knife adjusting shaft (43) and a knife adjusting screw rod (33) are fixedly installed on both sides of the clamping block (18) and the knife adjusting retaining edge (45), a knife feeding movable part (31) is installed on the knife adjusting screw rod (33), and the knife feeding movable part (31) is sleeved on the knife adjusting shaft (43), a knife seat (35) is fixedly connected to the knife feeding movable part (31), and a peeling knife (37), an infrared sensor (39) and a knife adjusting limit sensor (41) are installed on the knife seat (35); A knife adjusting motor fixing part (49) is fixedly connected to the knife adjusting retaining edge (45), a knife adjusting motor (47) is installed on the knife adjusting motor fixing part (49), and the knife adjusting motor (47) is connected to a knife adjusting screw rod (33).

3. The symmetrical double-blade screw-in automatic wire stripper according to claim 1, characterized in that: The knife adjusting structure comprises a knife adjusting rib (46), a knife adjusting shaft (44) and a knife adjusting screw (34) are fixedly mounted on both sides of the clamping block (17) and the knife adjusting rib (46), a knife adjusting screw (34) is mounted with a knife feed movable part (32), and the knife feed movable part (32) is sleeved on the knife adjusting shaft (44), a knife seat (36) is fixedly connected to the knife feed movable part (32), and a peeling knife (38), an infrared sensor (40) and a knife adjusting limit sensor (42) are mounted on the knife seat (36); The second knife adjusting retaining edge (46) is fixedly connected with a second knife adjusting motor fixing part (50), the second knife adjusting motor (48) is installed on the second knife adjusting motor fixing part (50), and the second knife adjusting motor (48) is connected with the second knife adjusting screw rod (34).

4. The symmetrical double-blade screw-in automatic wire stripper according to claim 1, characterized in that: The flip gear transmission assembly comprises a flip driven gear (12) and two transmission gears (16), wherein the flip driven gear (12) and the two transmission gears (16) are installed in a cavity, and the transmission gear (16) and the flip driven gear (12) are meshed, and the flip driven gear (12) is connected to a gear bridge (13), and the output shaft of the flip motor (7) extends into the cavity and is installed with a flip driving gear (11), and the flip driven gear (12) and the gear bridge (13) are both meshed with the flip driving gear (11).

5. A symmetrical double-blade screw-in automatic wire stripper according to claim 4, characterized in that: Two ratchet pawls (14) are symmetrically mounted on the end surface of the flip driven gear (12), ratchet teeth are provided on the flip fixed plate (10), and each ratchet pawl (14) is meshed with the ratchet teeth, and an emergency unlocking pull ring (15) is mounted on the flip driven gear (12).

6. The symmetrical double-blade screw-in automatic wire stripper according to claim 1, characterized in that: The clamping gear transmission assembly comprises a clamping driving gear (25), and the clamping driving gear (25) is mounted on the output shaft of the clamping motor (24), and a clamping driven gear (26) is mounted on the clamping screw rod (19), and the clamping driving gear (25) is meshed with the clamping driven gear (26).

7. The symmetrical double-blade screw-in automatic wire stripper according to claim 1, characterized in that: The clamping rib 1 (22) is fixedly connected with a clamping limit sensor (27), and the clamping block 1 (17) is fixedly connected with a clamping trigger member (28). When the clamping trigger member (28) triggers the clamping limit sensor (27), the clamping block 1 (17) and the clamping block 2 (18) open to a maximum angle, the clamping block 2 (18) is fixedly connected with a trigger steel sheet (29) and a clamping state sensor (30). The trigger steel sheet (29) triggers the clamping state sensor (30), and the clamping block 1 (17) and the clamping block 2 (18) clamp the wire.

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