Wire cutter

Abstract

The utility model provides a wire cutter, relates to the technical field of power construction tools, and solves the problem that a steel core is damaged when a steel-cored aluminum strand is cut in the prior art. The wire cutter comprises a tool rest, a fixed blade, a movable blade and a lifting mechanism, the lifting mechanism is installed on the tool rest, and the movable blade is installed at the output end of the lifting mechanism; avoiding holes are respectively formed in the fixed blade and the movable blade in a penetrating manner; a guide plate; the guide plate is arranged on the knife rest in a sliding mode, and a groove used for guiding a cut wire to gradually move towards the movable blade and fixed blade avoiding hole in the shearing process is formed in the guide plate; the steel-cored aluminum strand is pushed to move along the groove of the guide plate in the cutting process of the driven blade, meanwhile, the guide plate moves towards the movable blade, and therefore in the cutting process of the fixed blade and the blade, the center of the steel-cored aluminum strand is guided to be aligned with the two receding holes under the action of the groove.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power construction tools, in particular to a wire cutter. Background Art

[0002] Steel core has good mechanical strength, aluminum has excellent conductivity (small resistivity) and small specific gravity. Steel core aluminum stranded wire combines these advantages and is suitable for high power, high voltage, and long-distance power transmission; while steel core or steel stranded wire core, i.e., stranded steel core wire (hereinafter the same), only has high mechanical strength and strong tensile strength, but is not suitable for power transmission. The combination of the two can achieve the purpose of complementary advantages.

[0003] During the wiring process, when a certain length of steel core aluminum stranded wire is running out and another steel core aluminum stranded wire is needed to connect and continue laying out the wire, there must be a process of connecting the two adjacent steel core aluminum stranded wires end to end. If the two steel core aluminum stranded wires are to be connected end to end, it is usually necessary to strip the aluminum stranded wire wrapped around a single steel core or a twisted steel core, and then place a sleeve between the ends of the two steel cores or twisted steel core wires after the aluminum strands are stripped. Then, use a device similar to CN2626093Y (hydraulic wire crimping machine), CN2742641Y (hydraulic wire crimping machine), CN2850068Y (hydraulic wire crimping machine), CN100421315C (hydraulic wire crimping pliers with overload protection function) and CN100535453C (reversing valve of hydraulic wire crimping machine) to crimp the sleeve to the ends of the two steel cores or twisted steel core wires.

[0004] The stripping of the aluminum strands wrapped around the steel core (usually a single thick steel wire) or the stranded steel core wire (formed by twisting multiple thin steel wires) needs to be done with the help of a specific tool. Typical literature disclosures of such tools include the "steel core aluminum stranded wire stripper" recommended by CN111509626A. The patent scheme objectively reflects the technical effect described in paragraph 0016 of its specification: "Since the moving blade has a semicircular concave cavity of the moving blade steel core and the stationary blade has a semicircular concave cavity of the stationary blade steel core, the moving blade edge of the moving blade and the stationary blade edge of the stationary blade will not cut the steel core or the stranded steel core wire during stripping, and can provide good protection for the steel core or the stranded steel core wire." However, CN111509626A also has the following defects: Since the aluminum strands are wrapped layer by layer on the outside of the steel core, when the center of the steel core aluminum strand is not aligned with the semicircular concave cavity during the shearing process, the steel core is easily damaged during the cutting process.

[0005] Therefore, it is urgent to develop a kind of wire cutter to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a wire cutter to solve the technical problem that the steel core is damaged when cutting the steel core aluminum stranded wire in the prior art. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a wire cutter, comprising:

[0009] Knife holder,

[0010] A fixed blade, the fixed blade being fixedly mounted on the blade holder;

[0011] A movable blade is slidably disposed on the blade holder and moves closer to or farther from the fixed blade in a sliding direction;

[0012] A lifting mechanism, wherein the lifting mechanism is mounted on the tool holder, and the movable blade is mounted on the output end of the lifting mechanism;

[0013] The fixed blade and the movable blade are respectively provided with avoidance holes, and when the fixed blade and the movable blade are in shearing contact with each other, the two avoidance holes relatively form a complete circular hole;

[0014] The guide plate is slidably arranged on the knife holder, and a groove is provided on the guide plate for guiding the cut line to gradually move toward the avoidance hole of the movable blade and the fixed blade during the shearing process.

[0015] Furthermore, the groove of the guide plate is opened in a V shape, and two opposite side walls of the groove are provided with guide surfaces for guiding the movement of the cut wire.

[0016] Furthermore, the angle of the groove ranges from 45 degrees to 150 degrees.

[0017] Furthermore, the straight-line distance between two non-intersecting end points of the two guide surfaces is not less than the blade width of the fixed blade or the movable blade.

[0018] Furthermore, the tool holder is also provided with an elastic component for pushing the guide plate to reset.

[0019] Furthermore, an arc groove is formed through the guide plate, and the arc groove is arranged at the intersection of the two guide surfaces. During the shearing process of the steel-core aluminum stranded wire, the guide plate is pushed by the elastic component to move the steel-core aluminum stranded wire along the guide surface toward the center of the arc groove.

[0020] Furthermore, the elastic component includes a spring and a positioning shaft, the positioning shaft is fixedly connected to the tool holder, the spring is sleeved on the positioning shaft, one end of the spring abuts against the tool holder, and the other end of the spring abuts against the guide plate, the compression direction of the spring is parallel to the sliding direction of the guide plate, and the tool holder is provided with a limit member for limiting the guide plate from sliding excessively close to the lower fixed blade.

[0021] Furthermore, a guide groove is provided on the tool holder, and the guide plate is slidably arranged in the guide groove along the compression direction of the spring. The guide plate is provided with a first protrusion facing the side wall of the guide groove, and the first protrusion is arranged at the end edge of the guide plate close to the fixed blade. The first protrusion is slidably arranged in the guide groove by a limiting member away from the side of the movable blade.

[0022] Furthermore, the guide plate is provided with a second protrusion on the side wall facing the guide groove, the second protrusion is provided at the end edge of the guide plate close to the movable blade, and the limiting member is fixedly connected to the side wall of the guide groove and is located between the first protrusion and the second protrusion.

[0023] Furthermore, the tool holder includes a tool seat and a blade holder, the blade holder is detachably connected to the tool seat, the tool seat is provided with an accommodating cavity at the end facing the blade holder, the lifting mechanism is installed in the tool seat, and the movable blade slides out of the accommodating cavity and slides toward the fixed blade.

[0024] Furthermore, the lifting mechanism includes a piston, a first oil inlet pipe and a second oil inlet pipe. An oil chamber is opened through the tool holder. The piston is arranged in a T shape. The piston is slidably arranged in the oil chamber. The T-shaped tail end of the piston divides the oil chamber into an oil inlet chamber and an oil discharge chamber. The first oil pipe is connected to the oil inlet chamber, and the second oil pipe is connected to the oil discharge chamber. The end of the piston is fixedly connected to the movable blade.

[0025] Furthermore, an oil discharge chamber connected to the oil inlet chamber is provided at the center of the piston.

[0026] The preferred technical solution of the utility model can also produce at least the following technical effects:

[0027] During use, the steel-core aluminum stranded wire to be cut is placed between the moving blade and the fixed blade, and the guide plate is located above the moving blade during use, with the groove of the guide plate facing the moving blade, so that the cut steel-core aluminum stranded wire is located in the groove, and the moving blade pushes the steel-core aluminum stranded wire toward the fixed blade under the action of the lifting mechanism to achieve cutting of the aluminum stranded wire. Under the gravity of the guide plate, the cut steel-core aluminum stranded wire moves along the groove under the push of the moving blade, and the guide plate moves toward the direction of the moving blade. Therefore, during the cutting process between the fixed blade and the blade, the steel-core aluminum stranded wire will be guided by the groove to align its center with the two avoidance holes. Then, in the subsequent cutting process, the cutting of the aluminum stranded wire and the avoidance of the steel core are completed, avoiding the problem of damage to the steel core during the shearing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model;

[0030] Figure 2 It is a first angle cross-sectional view provided by an embodiment of the utility model;

[0031] Figure 3 It is a second angle cross-sectional view provided by an embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the force on the guide plate provided in the embodiment of the utility model;

[0033] Figure 5 It is a third angle sectional view provided by an embodiment of the utility model.

[0034] Explanation of the reference numerals: 100, knife seat; 110, fixing strip; 120, clamping plate; 130, side plate; 200, lifting mechanism; 210, piston; 220, oil discharge chamber; 230, oil inlet chamber; 240, oil storage chamber; 250, second oil inlet pipe; 260, first oil inlet pipe; 300, guide plate; 310, groove; 320, positioning shaft; 330, spring; 340, guide groove; 350, accommodating groove; 360, arc groove; 370, guiding surface; 400, blade assembly; 410, moving blade; 420, fixed blade; 430, avoidance hole; 440, slide groove; 450, first protrusion; 460, limit member; 470, second protrusion. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] The following is combined with Figure 1-5 The present application is further described in detail. An embodiment of the present application discloses a wire cutter.

[0039] Reference Figure 1 and Figure 2As shown, a wire cutter comprises a knife frame, a blade assembly 400, a guide plate 300, a lifting mechanism 200 and an elastic component. The blade assembly 400 comprises a movable blade 410 fixedly mounted on the knife frame and a fixed blade 420 slidably mounted on the knife frame, the fixed blade 420 is arranged opposite to the movable blade 410, and the movable blade 410 slides in a direction reciprocating in a straight line direction close to or away from the fixed blade 420. The guide plate 300 is slidably mounted on the knife frame, the sliding position of the guide plate 300 is parallel to the sliding position of the movable blade 410, and the sliding direction of the guide plate 300 is arranged in the same direction as the sliding direction of the movable blade 410. The lifting mechanism 200 is mounted on the knife frame for driving the movable blade 410 to slide, the elastic component is fixedly mounted on the knife frame, and its setting position is arranged opposite to the lifting mechanism 200, and the elastic component is installed between the knife frame and the side of the guide plate 300 facing away from the lifting mechanism 200.

[0040] Reference Figure 2 and Figure 3 As shown, the knife holder includes a knife seat 100 and a blade holder, and the blade holder is detachably connected to the knife seat 100. The knife seat 100 is arranged in a Y shape, and a receiving cavity is provided at the Y-shaped double-headed end of the knife seat 100, and the receiving cavity divides the Y-shaped end of the knife seat 100 into two V-shaped pieces. The blade holder includes a side plate 130, a clamping plate 120 and two fixing strips 110, and the side plate 130, the clamping plate 120 and the fixing strips 110 are arranged in sequence. The two fixing strips 110 are arranged on the same side of the clamping plate 120, and the two fixing strips 110 are symmetrically arranged on both sides, one end of the fixing strip 110 is fixedly connected to the knife seat 100 by a positioning bolt, and the other end of the fixing strip 110 is extended along the length extension direction of the knife seat 100.

[0041] Reference Figure 2 and Figure 3 As shown, the clamping plate 120 is arranged in a U shape, and the two ends of the clamping plate 120 face the knife seat 100 and correspond to the two fixing strips 110 respectively, and the positioning bolts fixed to the fixing strips 110 also penetrate the clamping plate 120 respectively. That is, the clamping plate 120 and the fixing strips 110 are arranged in the accommodating cavity, and the positioning bolts penetrate from one side of the knife seat 100 to the other side, so as to fix the clamping plate 120 and the fixing strips 110 between the accommodating cavity.

[0042] Each fixing strip 110 is provided with two positioning screws in the length direction. The two positioning screws are arranged along the length direction of the fixing strip 110. The positioning screws pass through the splint 120 and the fixing strip 110 in sequence to form a tight connection between the splint 120 and the fixing strip 110.

[0043] The side plate 130 is also U-shaped, with one end of the side plate 130 facing the knife seat 100, and the side plate 130 is arranged on the side of the clamping plate 120 facing away from the fixing strip 110. The positioning screws on the fixing strip 110 pass through the side plate 130 respectively, so as to form a mutual fixation between the side plate 130, the clamping plate 120, and the fixing strip 110.

[0044] The fixing strip 110 is a strip structure, and the two strip structures are connected to the clamping plate 120, which can reduce the material usage of the fixing strip 110, reduce the production cost, and reduce the overall weight of the equipment.

[0045] In the above structure, the accommodating cavity of the tool holder 100 is connected with the middle positions of the side plates 130, the clamping plates 120 and the two fixing strips 110, that is, a shearing space is formed in the middle of the tool holder.

[0046] Reference Figure 3 and Figure 5 As shown, the two fixed strips 110 have a sliding groove 440 extending along the length of the opposite side walls. The fixed blade 420 is disposed at the top of the sliding groove 440, and the fixed blade 420 is fixedly connected to the clamping plate 120 by screws. The fixed blade 420 has a semicircular avoidance hole 430 in the middle of the blade facing the blade seat 100.

[0047] The movable blade 410 is slidably disposed in the slide groove 440, that is, it reciprocates and slides from the lower end of the slide groove 440 toward the direction of the fixed blade 420, and the movable blade 410 is fixedly connected to the lifting mechanism 200. The movable blade 410 is also provided with a semicircular avoidance hole 430 in the middle of the blade of the movable blade 410. When the blade of the movable blade 410 is pushed by the lifting mechanism 200 and is attached to the blade of the fixed blade 420, the two semicircular avoidance holes 430 form a complete circular hole for accommodating the protected wire during the cutting process.

[0048] The side plate 130 is provided with a guide groove 340 on the side wall facing the clamping plate 120 , and the length extension direction of the guide groove 340 is parallel to the length extension direction of the slide groove 440 . The guide plate 300 is slidably disposed in the guide groove 340 , and the elastic component is disposed on the side of the guide plate 300 facing away from the knife seat 100 .

[0049] Reference Figure 2 and Figure 3As shown, two groups of elastic components are provided, and the two groups of elastic components are arranged in sequence along the width direction of the guide plate 300. The elastic components include a spring 330 and a positioning shaft 320. The side wall of the guide plate 300 facing away from the knife seat 100 is provided with a receiving groove 350. The positioning shaft 320 is fixedly connected to the side wall of the guide groove 340, and the positioning shaft 320 is extended along the sliding direction of the guide plate 300. The spring 330 is sleeved on the positioning shaft 320, that is, one end of the spring 330 abuts against the side plate 130, and the other end of the spring 330 is inserted into the receiving groove 350 and abuts against the bottom surface of the receiving groove 350.

[0050] The side plate 130 is provided with a stopper 460 for limiting excessive sliding of the guide plate 300. Two stoppers 460 are provided, respectively provided on both sides of the side plate 130. The stoppers 460 are fixedly mounted on the side wall of the guide groove 340, and the length extension direction of the stoppers 460 is perpendicular to the sliding direction of the guide plate 300.

[0051] Reference Figure 2 and Figure 3 As shown, the first protrusion 450 and the second protrusion 470 are fixedly arranged on the side wall of the guide plate 300 facing the guide groove 340, respectively. The first protrusion 450 is arranged at the end edge of the guide plate 300 close to the fixed blade 420, and the second protrusion 470 is arranged at the end edge of the guide plate 300 close to the movable blade 410. The stopper 460 is arranged between the first protrusion 450 and the second protrusion 470. During the sliding process of the guide plate 300, the first protrusion 450 limits the guide plate 300 from sliding excessively toward the movable blade 410. The second protrusion 470 keeps the guide plate 300 balanced and stable during the sliding process of the guide plate 300.

[0052] The guide plate 300 is provided with a V-shaped groove 310 on the end surface facing the fixed blade 420. The groove 310 is arranged through the thickness direction of the guide plate 300, and the notch of the groove 310 is arranged at the end of the guide plate 300. The two opposite side walls of the V-shaped groove 310 are guide surfaces 370 for guiding the cutting wire during the cutting process. The angular bisector of the V-shaped groove 310 coincides with the center line of the semicircular avoidance hole 430, and the angular bisector of the groove 310 is parallel to the sliding direction of the guide plate 300.

[0053] Reference Figure 3 and Figure 4As shown, during the cutting process, the steel core aluminum stranded wire to be cut passes through the shearing space between the blade holder 100 and the blade holder, and at the same time, the fixed blade 420 and the movable blade 410 are located on both sides of the steel core aluminum stranded wire, and the guide plate 300 and the fixed blade 420 are arranged on the same side. The guide surface 370 of the guide plate 300 abuts against the guide surface 370 under the action of the spring 330. During the cutting process, the movable blade 410 pushes the steel core aluminum stranded wire to approach the fixed blade 420. In this process, the movable blade 410 provides the steel core aluminum stranded wire with a force F1 in the sliding direction of its guide plate 300. When the initial placement point of the steel core aluminum stranded wire is not in the exact center of the V-shaped groove 310, the force F1 will be divided into a force F2 perpendicular to the guide surface 370 and a force F3 toward the direction of its angle bisector during the movement process of pushing the steel core aluminum stranded wire to contact the guide surface 370.

[0054] As the moving blade 410 pushes, the steel core aluminum strand will approach the center of the V-shaped groove 310 along the guide surface 370, thereby realizing the alignment of the steel core in the steel core aluminum strand and the avoidance hole 430. When the steel core aluminum strand is located at the center of the V-shaped groove 310, its force F3 and force F2 are combined into a force opposite to F1, so that the steel core aluminum strand is aligned and cut under the action of the fixed blade 420 and the moving blade 410.

[0055] When the cutting is finished, the steel core of the steel core aluminum stranded wire is just located in the avoidance hole 430, thereby completing the protection of the protected wire.

[0056] The guide plate 300 is also provided with an arc groove 360 ​​, which is arranged at the center of the V-shaped groove 310 , ie, the intersection of the two guide surfaces, so as to facilitate accommodating the steel core during the cutting process of the steel core aluminum stranded wire.

[0057] The angle of the groove 310 ranges from 45 degrees to 150 degrees. In this embodiment, the preferred angle is 120 degrees to facilitate the sliding of the steel core aluminum stranded wire on the guide surface.

[0058] The linear distance between the two guide surfaces and the end of the arc groove 360 ​​is not less than the blade width of the fixed blade 420 or the movable blade 410. The applicability of the guide plate 300 is increased, so that the steel wire aluminum stranded wire that can be cut by the wire cutter can be guided by the guide plate 300.

[0059] Reference Figure 3 and Figure 5As shown, the lifting mechanism 200 includes a piston 210, a first oil inlet pipe 260 and a second oil inlet pipe 250. An oil chamber is provided in the tool holder 100. The piston 210 is T-shaped and slidably provided in the oil chamber. The end of the T-shaped piston 210 passes through the accommodating chamber and is fixedly connected to the movable blade 410. The T-shaped piston 210 divides the oil chamber into an oil inlet chamber 230 and an oil discharge chamber 220. The first oil inlet pipe 260 is connected to the oil inlet chamber 230, and the second oil inlet pipe 250 is connected to the oil discharge chamber 220. An oil storage chamber 240 connected to the oil inlet chamber 230 is provided in the center of the piston 210.

[0060] During the extension process, the first oil inlet pipe 260 fills oil into the oil inlet chamber 230, and the piston 210 extends outward under the pressure of the hydraulic oil to push the piston 210 to slide. During the contraction process, the second oil inlet pipe 250 fills oil into the oil outlet chamber, and the piston 210 contracts under the pressure of the hydraulic oil, and the hydraulic oil in the oil inlet chamber 230 is discharged at the same time, thereby completing the extension and retraction action of the piston 210 rod.

[0061] During the process of filling the oil inlet chamber 230 with oil, the oil storage chamber 240 will be filled with oil in advance during the installation process, thereby reducing the filling time of the oil inlet chamber 230 and reducing the weight of the piston 210, thereby ensuring the flexibility of the piston 210 during operation.

[0062] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A wire cutter, characterized in that: include: Knife holder, A fixed blade (420), the fixed blade (420) being fixedly mounted on the blade holder; A movable blade (410), the movable blade (410) being slidably disposed on the blade holder and moving closer to or farther from the fixed blade (420) in a sliding direction; A lifting mechanism (200), the lifting mechanism (200) being mounted on a tool holder, and the movable blade (410) being mounted on an output end of the lifting mechanism (200); The fixed blade (420) and the movable blade (410) are respectively provided with an avoidance hole (430), and when the fixed blade (420) and the movable blade (410) are in shearing contact with each other, the two avoidance holes (430) relatively form a complete circular hole; The guide plate (300) is slidably disposed on the blade holder, and the guide plate (300) is provided with a groove (310) for guiding the cut line to gradually move toward the avoidance hole (430) of the movable blade (410) and the fixed blade (420) during the shearing process.

2. The wire cutter according to claim 1, characterized in that The groove (310) of the guide plate (300) is opened in a V-shape, and two opposite side walls of the groove (310) are provided with guide surfaces (370) for guiding the movement of the cut wire.

3. The wire cutter according to claim 2, characterized in that: The included angle of the groove (310) ranges from forty-five degrees to one hundred and fifty degrees.

4. The wire cutter according to claim 2, characterized in that: The straight-line distance between the two non-intersecting end points of the two guide surfaces (370) is not less than the blade width of the fixed blade (420) or the movable blade (410).

5. The wire cutter according to claim 2, characterized in that: The tool holder is also provided with an elastic component for pushing the guide plate (300) to reset.

6. The wire cutter according to claim 5, characterized in that The guide plate (300) is provided with an arc groove (360) extending therethrough, the arc groove (360) being arranged at the intersection of the two guide surfaces (370); during the shearing process of the steel-core aluminum stranded wire, the guide plate (300) is pushed by the elastic component so that the steel-core aluminum stranded wire moves along the guide surface (370) toward the center of the arc groove (360).

7. The wire cutter according to claim 5, characterized in that The elastic component comprises a spring (330) and a positioning shaft (320); the positioning shaft (320) is fixedly connected to the tool holder; the spring (330) is sleeved on the positioning shaft (320); one end of the spring (330) abuts against the tool holder; the other end of the spring (330) abuts against the guide plate (300); a compression direction of the spring (330) is parallel to a sliding direction of the guide plate (300); and a limiting member (460) is provided on the tool holder for limiting the guide plate (300) from excessively sliding close to the fixed blade (420).

8. The wire cutter according to claim 7, characterized in that The knife holder is provided with a guide groove (340), the guide plate (300) is slidably arranged in the guide groove (340) along the compression direction of the spring (330), the guide plate (300) is provided with a first protrusion (450) facing the side wall of the guide groove (340), the first protrusion (450) is arranged at the end edge of the guide plate (300) close to the fixed blade (420), and the first protrusion (450) is slidably arranged in the guide groove (340) by a limiting member (460) away from the side of the movable blade (410).

9. The wire cutter according to claim 8, characterized in that The guide plate (300) is provided with a second protrusion (470) on the side wall facing the guide groove (340); the second protrusion (470) is provided at the end edge of the guide plate (300) close to the movable blade (410); the limiting member (460) is fixedly connected to the side wall of the guide groove (340) and is located between the first protrusion (450) and the second protrusion (470).

10. The wire cutter according to claim 9, characterized in that The knife holder comprises a knife seat (100) and a blade holder, the blade holder being detachably connected to the knife seat (100), the knife seat (100) being provided with an accommodating cavity at an end portion facing the blade holder, the lifting mechanism (200) being installed in the knife seat (100), and the movable blade (410) sliding out of the accommodating cavity and sliding towards the fixed blade (420).

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