A tool for cutting and stripping the outer sheath of small-sized cables and its usage method

Abstract

This invention discloses a small-diameter cable sheath stripping tool, comprising a reset blade holder, an operating frame, and a cable guide tube for radially limiting the cable. The reset blade holder is hinged to the operating frame, which controls the tilting and rotation of the reset blade holder. The cable guide tube is detachably connected to the operating frame. A blade for cutting the cable inside the cable guide tube is mounted on the reset blade holder. This invention also discloses a method for using this small-diameter cable sheath stripping tool. Using this invention, the cutting path can be stably, accurately, and conveniently controlled, thereby completing the longitudinal stripping operation of small cable sheaths conveniently, efficiently, safely, and labor-savingly.

Description

Technical Field

[0001] This invention relates to the field of electrical tools, and more specifically, to a tool and method for stripping the outer sheath of small-diameter cables. Background Technology

[0002] In electrical installations such as cable laying and connection, an indispensable step is longitudinal stripping of the cable sheath. Commonly used tools for this include electrician's knives, utility knives, and a few homemade tools with hooks. However, these tools do not restrict the cable's freedom of movement or limit the tool's direction. Because the outer surface of a conventional cable is cylindrical, controlling the cutting direction is extremely difficult when longitudinally stripping the cable without reliable support. Therefore, during longitudinal stripping, someone needs to hold the cable steady and assist the operator. The operator must also maintain firm control over the cutting direction and depth, leading to low efficiency. Furthermore, the uneven force applied during stripping due to the lack of support can damage the cable's insulation and even injure the operator. For small cables with an outer diameter of less than 25mm, especially small-diameter cables of 6-15mm, longitudinal stripping is even more challenging. While a widely used type of wire stripper exists in the industry, consisting of a pair of handles hinged on both sides, with a blade for stripping cable sheaths mounted on one side and an arc-shaped groove for holding the cable on the other, this type of wire stripper can only be used for circumferential stripping of cables, not for longitudinal stripping of cable sheaths. Therefore, safely, smoothly, efficiently, and effectively stripping cable sheaths longitudinally using existing tools is a challenging task. Developing a safe, efficient, convenient, and labor-saving tool for longitudinally stripping cable sheaths is therefore essential. Summary of the Invention

[0003] Using ordinary wire stripping tools to longitudinally strip the outer sheath of cables is cumbersome, inconvenient, inefficient, and prone to damaging the insulation layer of the cable core, resulting in poor safety. To overcome these shortcomings, this invention provides a small-sized cable outer sheath stripping tool and method that is stable and convenient to operate, thereby enabling convenient, efficient, safe, and labor-saving longitudinal stripping of cable outer sheaths.

[0004] The technical solution of this invention is: a small-specification cable sheathing cutting and stripping tool, comprising a reset blade holder, an operating frame, and a cable guide tube for radially limiting the cable. The reset blade holder is hinged to the operating frame, which controls the tilting and rotation of the reset blade holder. The cable guide tube is detachably connected to the operating frame. A blade for cutting the cable inside the cable guide tube is mounted on the reset blade holder. In this invention, the operating frame cooperates with the reset blade holder to control the tilt of the reset blade holder, thereby obtaining a suitable cable sheathing cutting depth. The cable guide tube has both cable fixing and guiding functions, allowing the cylindrical cable inserted into the cable guide tube to be fixed radially, and also providing a certain degree of restriction in the circumferential direction due to friction. This prevents the cable inside the cable guide tube from shifting or twisting laterally, making the cutting and stripping area easier to control precisely. This small-diameter cable sheath stripping tool is developed based on the concept of "static limiting and cutting along with the blade." This means that it reliably controls small-diameter cables of different specifications and placement states to be stripped, keeping them in a static position. The stripping point and stripping path of the small-diameter cable sheath are firmly limited to the cutting position of the tool's blade, reliably achieving "longitudinal cutting following the movement of the blade." This ensures that the cable is completely confined to the cable sheath stripping point set by the operator, and the tool is controlled according to the set stripping depth to smoothly complete the longitudinal stripping work. Therefore, using this invention overcomes the shortcomings of existing stripping tools, which lack constraint and guidance functions and rely heavily on the operator's experience and skills, thus enabling convenient, efficient, safe, and labor-saving longitudinal stripping of cable sheaths.

[0005] Preferably, the cable guide tube includes a hollow straight tube and a longitudinally grooved cable limiting platform. The longitudinally grooved cable limiting platform is located at the end of the hollow straight tube, and the end of the hollow straight tube also has a cable stripping groove that radially penetrates the tube wall and can accommodate the insertion of a blade. The longitudinally grooved cable limiting platform has a groove for accommodating the cable. The cable is inserted into the hollow straight tube, with one side contacting the arc-shaped inner wall of the hollow straight tube and the other side contacting the groove surface. The distance between the inner wall of the hollow straight tube and the groove is controlled within a suitable range to generate a suitable clamping force, so that the cable is reliably limited within the cable guide tube, with a large degree of freedom only in the axial direction, making it easy to slide longitudinally.

[0006] Preferably, the longitudinal trough-shaped cable limiting platform includes an inner section and an outer section. The inner section is located inside a hollow straight pipe, while the outer section extends out from the inner wall of the hollow straight pipe and is connected to the outer wall of the hollow straight pipe. The outer wall of the hollow straight pipe is equipped with cable cutting adjustment bolts corresponding to the inner section, which abut against the longitudinal trough-shaped cable limiting platform. The inner section is used for direct contact with the cable, constraining and guiding it, while the outer section extends out of the hollow straight pipe, facilitating a reliable connection. Adjusting the cable cutting adjustment bolts allows for a better fit between the longitudinal trough-shaped cable limiting platform and the inner wall of the hollow straight pipe, thus enabling the limiting and cutting of small-diameter cables.

[0007] Preferably, the inner section extends beyond the hollow straight pipe port, and the exposed end of the inner section has a tongue-shaped outward-flaring structure. This design facilitates the smooth insertion of the cable into the guide pipe.

[0008] Preferably, both ends of the hollow straight pipe are equipped with longitudinal grooved cable limiting platforms. This allows for the integration of more functions within a limited structural space. In actual use, two different specifications of longitudinal grooved cable limiting platforms can be installed according to work requirements, or the cutting height of two different cable specifications can be adjusted. During operation, one specification of cable is cut and stripped first. After completion, the cable guide tube is removed, swapped, and reinstalled on the operating frame to cut and strip another specification of cable. This design significantly improves work efficiency when cutting and stripping two or more specifications of cables. The order of use should be "fine to coarse," meaning that the smaller cables with finer outer diameters are cut and stripped first. Then, the corresponding longitudinal grooved cable limiting platform is returned to its initial position, and the guide tube is reversed to cut and strip the slightly larger cables.

[0009] Preferably, the connection between the cable guide tube and the operating frame is equipped with a keyway joint structure. Since longitudinal stripping of cables of different specifications is frequently required, the cable guide tube and the operating frame are often disassembled and reassembled. The keyway joint structure facilitates quick alignment during installation, improving work efficiency.

[0010] Preferably, the reset tool holder includes a tool holder and a tool holder fixing base. The tool holder fixing base is connected to the operating frame, and the blade is slidably connected to the tool holder. The blade has a blade extension / retraction adjustment knob, and a tool holder reset spring is provided between the tool holder and the operating frame. The tool holder provides reliable mounting support for the blade, and the tool holder is connected to the operating frame through the tool holder fixing base. The blade extension / retraction adjustment knob is used to maintain the extended length after the blade is extended, and the tool holder reset spring enables the tool holder to have an automatic reset function.

[0011] Preferably, the operating frame includes a frame body and a lifting rod, with the lifting rod hinged to the frame body. One end of the lifting rod presses against the reset blade holder, and a return spring connects the frame body and the lifting rod. During operation, both the frame body and the lifting rod are held simultaneously. By tightening the fingers, the lifting rod rotates, pressing against the rear of the reset blade holder. Based on the lever principle, the front of the blade mounted on the blade holder dips downwards, thus cutting the blade head into the designated cable sheath stripping position. After the cable sheath stripping is completed, the user releases the grip. Under the traction of the blade holder return spring and the lifting rod return spring, this small-specification cable sheath stripping tool returns to its initial state. At this point, the blade head leaves the stripping position, and the cable is successfully separated from the tool.

[0012] Preferably, the frame is equipped with a lifting limit rod that can abut against the lifting rod, and the lifting limit rod is threaded onto the frame. The cutting depth needs to be adjusted according to the thickness of the cable sheath. The lifting limit rod can more conveniently and accurately limit the pressure of the lifting rod on the reset blade holder, which can not only easily complete the longitudinal cutting of the cable sheath, but also control the cutting depth and effectively prevent the insulation layer and conductive core of the core wire from being scratched by the blade.

[0013] A method for using the aforementioned small-gauge cable sheathing cutting tool includes the following steps:

[0014] Step 1. Insert the cable guide tube of the required specifications into the operating frame and securely fix the cable guide tube on the operating frame to form a small cable sheath cutting and stripping tool;

[0015] Step 2. Insert the small cable to be stripped into the installed cable guide tube;

[0016] Step 3. Based on the specifications and outer sheath thickness of the small cable, rotate the lifting limit rod to adjust and determine the cutting depth of the blade into the cable sheath; use the cable feeding adjustment bolt to lift the longitudinal grooved cable limiting platform to an appropriate height in the cable guide tube, so that the small cable slightly touches the upper wall of the cable guide tube.

[0017] Step 4. Apply force to the lifting rod so that it presses against the reset tool holder. The end of the lifting rod presses against the bottom of the reset tool holder, using the lever principle to make the tail end of the tool holder tilt upward while the head end, i.e. the end where the blade tip is located, sinks downward.

[0018] Step 5. Move the small cable axially relative to the small cable sheath stripping tool to complete the longitudinal stripping of the sheath.

[0019] After the above steps are completed, the operator can adjust the small cable sheath stripping tool properly and perform longitudinal stripping of various small cables according to work requirements.

[0020] The beneficial effects of this invention are:

[0021] This invention greatly simplifies the longitudinal stripping of small cables. Using this invention, the stripping path can be controlled stably, accurately, and conveniently, thus enabling convenient, efficient, safe, and labor-saving longitudinal stripping of small cable sheaths. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention after the cable guide tube has been removed;

[0024] Figure 3 This is a schematic diagram of the structure of the present invention after the cable guide tube and baffle have been removed;

[0025] Figure 4 This is a schematic diagram of the structural state of the operating frame in this invention;

[0026] Figure 5 This is a schematic diagram showing the cooperation between the reset tool holder and the lifting rod during the use of this invention;

[0027] Figure 6 This is a schematic diagram of one structure of the cable guide tube in this invention;

[0028] Figure 7 This is a partial cross-sectional view of the cable guide tube in this invention;

[0029] Figure 8 This is a top view of the longitudinal grooved cable limiting platform in this invention;

[0030] Figure 9 This is a side view of the longitudinal grooved cable limiting platform in this invention;

[0031] Figure 10 This is a schematic diagram showing the mating state of the small cable and the cable guide tube in this invention;

[0032] Figure 11 This is an axial view showing the mating state of the small cable and the cable guide tube in this invention.

[0033] In the diagram, 1-Reset tool holder, 101-Blade, 102-Tool holder, 103-Tool holder fixing base, 104-Blade telescopic adjustment knob, 105-Tool holder reset spring, 2-Operating frame, 201-Frame body, 2011-Lifting limit rod, 2012-Hand handle, 2013-Hand grip anti-slip block, 2014-Base plate, 202-Lifting rod, 2021-Hand grip anti-slip auxiliary handle, 203-Lifting rod reset spring, 3-Cable guide tube, 301-Hollow straight tube, 3011-Cable cutting and stripping groove, 3012-Cable cutting adjustment bolt, 302-Longitudinal grooved cable limiting platform, 3021-Groove, 4-Small cable. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1:

[0036] like Figures 1 to 5 , Figures 8 to 11As shown, a small-sized cable sheathing cutting tool includes a reset blade holder 1, an operating frame 2, and a cable guide tube 3 for radially limiting the cable. The reset blade holder 1 is hinged to the operating frame 2, which controls the tilting and rotation of the reset blade holder 1. The cable guide tube 3 is detachably connected to the operating frame 2. A blade 101 for cutting the cable inside the cable guide tube 3 is mounted on the reset blade holder 1. The cable guide tube 3 includes a hollow straight tube 301 and a longitudinal grooved cable limiting platform 302. The longitudinal grooved cable limiting platform 302 is located at the front end of the hollow straight tube 301. The front end of the hollow straight tube 301 also has a cable stripping groove 3011 that radially penetrates the wall of the hollow straight tube 301 and allows the tip of the blade 101 to be inserted. The longitudinal grooved cable limiting platform 302 has a groove 3021 for accommodating the cable. A longitudinally oriented cable limiting platform 302 is located inside a hollow straight pipe 301, with its rear end extending through the pipe wall of the hollow straight pipe 301. The front end of the longitudinally oriented cable limiting platform 302 is located at the front port of the hollow straight pipe 301, thus forming an inner section and an outer section. The outer section is connected to the outer wall of the hollow straight pipe 301 by screws. A cable feeding and cutting adjusting bolt 3012 corresponding to the inner section is provided on the outer wall of the hollow straight pipe 301. The cable feeding and cutting adjusting bolt 3012 is equipped with a matching fastening nut, and it abuts against the longitudinally oriented cable limiting platform 302. The inner section extends to the outside of the port of the hollow straight pipe 301, and its exposed end has a tongue-shaped outward-flaring structure. The operating frame 2 includes a frame body 201 and a lifting rod 202. The frame body 201 includes a handle 2012, a grip force anti-slip block 2013, and a base plate 2014. The handle 2012 is located at the top of the frame body 201, and the base plate 2014 is located at the bottom of the frame body 201. The handle 2012 is connected to the base plate 2014 through a diagonal rod and two pairs of vertical rods. The diagonal rod is located at the front end of the frame body 201. The hinge point between the reset tool holder 1 and the operating frame 2 is located on the diagonal rod. The handle 2012, the diagonal rod, the vertical rods, and the base plate 2014 form a cavity, and a baffle is provided on the side of the cavity. The reset tool holder 1 includes a tool holder 102 and a tool holder fixing base 103. The tool holder fixing base 103 is connected to the operating frame 2 through a rotating shaft. The blade 101 is slidably connected in a groove on the tool holder 102. The cross-section of the groove is T-shaped, with a larger bottom and a smaller opening. The blade 101 is equipped with a blade extension adjustment knob 104. A screw is fixed to the blade extension adjustment knob 104, passing through the tail of the blade 101 and connected to a pressure plate via a thread. The pressure plate is located at the bottom of the blade groove. When the blade extension adjustment knob 104 is tightened, the pressure plate moves closer to the inner wall of the top of the blade groove, pressing the blade 101 together with the inner wall of the top of the blade groove, thus positioning the blade 101 through static friction. A blade holder return spring 105 is provided between the blade holder 102 and the base plate 2014 of the operating frame 2. A grip anti-slip stop 2013 is fixed to the tail of the grip handle 2012 by screws.A lifting rod 202 is provided, with one end hinged to the longitudinal bar of the frame 201 via a pivot, and the other end being a free end that is slightly upturned and presses against the bottom of the tool holder 102 of the reset tool holder 1. A hand grip anti-slip auxiliary handle 2021 is fixed to the hinged end of the lifting rod 202 with screws. The bottom of the hand grip anti-slip auxiliary handle 2021 has a slope to prevent the hand from sliding towards the hinged end of the lifting rod 202. A lifting rod reset spring 203 connects the bottom plate 2014 of the frame 201 to the lifting rod 202. The connection between the cable guide tube 3 and the operating frame 2 is provided with a keyway fit structure. This keyway fit structure includes a trapezoidal columnar protruding key integrally located on the top of the cable guide tube 3 and a trapezoidal groove opened at the bottom of the bottom plate 2014 of the operating frame 2. The protruding key and the trapezoidal groove are adapted to each other. The key has bolt holes, and a connecting bolt passes through the bottom of the operating frame 2. The connecting bolt engages with the thread in the bolt hole, allowing the cable guide tube 3 to be detachably connected to the operating frame 2. The handle 2012 of the frame 201 is equipped with a lifting limit rod 2011 that can abut against the lifting rod 202. The lifting limit rod 2011 is threadedly connected to the frame 201, and a matching fastening nut is provided on the lifting limit rod 2011.

[0037] A method for using the aforementioned small-gauge cable sheathing cutting tool includes the following steps:

[0038] Step 1. Insert the key of the cable guide tube 3 of the required specification into the trapezoidal groove of the frame 201 so that it fits into the operating frame 2 and is roughly positioned. After the cable guide tube 3 is inserted into place, tighten the guide tube positioning bolt to reliably fix the cable guide tube 3 on the operating frame 2 and assemble it into a small cable sheath cutting and stripping tool.

[0039] Step 2. Insert the small cable 4 that needs to be stripped into the installed cable guide tube 3;

[0040] Step 3. Based on the specifications and outer sheath thickness of the small cable 4, rotate the lifting limit rod 2011 to adjust and determine the cutting depth of the blade into the cable sheath. After adjustment, tighten the fastening nut on the lifting limit rod 2011. Use the cable cutting adjustment bolt 3012 to lift the longitudinal trough-shaped cable limiting platform 302 to an appropriate height in the cable guide tube 3, so that the small cable 4 slightly touches the upper wall of the cable guide tube 3. Tighten the fastening nut on the cable cutting adjustment bolt 3012.

[0041] Step 4. Hold the handle 2012 with your thumb and the lifting rod 202 with your other four fingers, and squeeze hard so that the lifting rod 202 presses against the reset tool holder 1. The end of the lifting rod 202 presses against the bottom of the tool holder 102 of the reset tool holder 1. Using the lever principle, the tail end of the tool holder 102 is raised while the head end, that is, the end where the blade tip of the blade 101 is located, is lowered.

[0042] Step 5. Keep the small cable 4 stationary and pull the small cable sheath stripping tool, or keep the small cable sheath stripping tool stationary and pull the small cable 4 to move the small cable 4 axially relative to the small cable sheath stripping tool to complete the longitudinal stripping of the sheath.

[0043] Example 2:

[0044] like Figure 6 , Figure 7 As shown, both ends of the hollow straight tube 301 are provided with longitudinal groove-shaped cable limiting platforms 302. The rest is the same as in Embodiment 1.

[0045] Example 3:

[0046] The key-groove mating structure includes a trapezoidal columnar convex key integrally disposed at the bottom of the operating frame 2, and a trapezoidal groove opened at the top of the cable guide tube 3, wherein the convex key and the trapezoidal groove are adapted to each other. The rest is the same as in Embodiment 1.

Claims

1. A small gauge small cable jacket stripping tool characterized by The reset tool holder is hinged to the operating frame, the operating frame is used to control the turning and tilting of the reset tool holder, the cable guide tube is detachably connected to the operating frame, the reset tool holder is provided with a blade capable of cutting the cable in the cable guide tube, the cable guide tube comprises a hollow straight tube and a longitudinal groove-shaped cable limiting platform, the longitudinal groove-shaped cable limiting platform comprises an inner-tube segment located in the hollow straight tube and an outer-tube segment extending through the wall of the hollow straight tube and connected to the outer wall of the hollow straight tube, and the outer wall of the hollow straight tube is provided with cable feeding and cutting adjusting bolts corresponding to the inner-tube segment and abutting against the longitudinal groove-shaped cable limiting platform.

2. A small gauge small cable sheath stripping tool according to claim 1 characterised in that, The longitudinal groove-shaped cable limiting platform is arranged at the end of the hollow straight tube, and the end of the hollow straight tube is further provided with a cable cutting and stripping groove penetrating through the wall of the hollow straight tube and capable of accommodating the blade, and the longitudinal groove-shaped cable limiting platform is provided with a groove for accommodating the cable.

3. The small gauge small cable sheath stripping tool of claim 1, wherein The inner-tube segment extends to the outside of the end of the hollow straight tube, and the exposed end of the inner-tube segment has a tongue-shaped outward structure.

4. The small gauge small cable sheath stripping tool of claim 1, wherein The longitudinal groove-shaped cable limiting platforms are arranged at both ends of the hollow straight tube.

5. The small gauge small cable sheath stripping tool of claim 1, wherein The key-and-groove matching structure is arranged at the connecting part of the cable guide tube and the operating frame.

6. The small gauge small cable sheath stripping tool of claim 1, wherein The reset tool holder comprises a tool holder and a tool holder fixing base, the tool holder fixing base is connected to the operating frame, the blade is slidingly connected to the tool holder, the blade is provided with a blade extension and contraction adjusting knob, and the tool holder is provided with a tool holder reset spring between the tool holder and the operating frame.

7. A small gauge small cable sheath stripping tool according to any one of claims 1 to 6, characterised in that The operating frame comprises a frame body and a jacking rod, the jacking rod is hinged to the frame body, one end of the jacking rod is pressed against the reset tool holder, and the frame body is connected with the jacking rod reset spring.

8. A small gauge small cable sheath stripping tool according to claim 7, characterised in that The jacking limiting rod is arranged on the frame body and capable of abutting against the jacking rod, and the jacking limiting rod is threadedly connected to the frame body.

9. A method of using the small gauge small cable jacket stripping tool of claim 8, characterized by The method comprises the following steps: Step one: embed and insert the cable guide tube of the required specification into the operating frame to reliably fix the cable guide tube on the operating frame and combine to form a small cable outer skin cutting and stripping tool; Step two: insert the small cable to be cut and stripped into the installed cable guide tube; Step three: according to the specification and the thickness of the outer skin of the small cable, rotate the jacking limiting rod to adjust and determine the depth of the blade cutting into the outer skin of the cable; Lift the longitudinal groove-shaped cable limiting platform to the appropriate height of the cable guide tube through the cable feeding and cutting adjusting bolts, so that the small cable slightly touches the upper wall of the cable guide tube; Step four: press the jacking rod of the operating frame to make the jacking rod press against the reset tool holder, the end of the jacking rod is pressed against the bottom of the tool holder of the reset tool holder, and the tail end of the tool holder is raised and the head end, i.e. the blade tip end, is lowered by using the principle of lever; Step five: move the small cable axially relative to the small cable outer skin cutting and stripping tool to complete the longitudinal cutting and stripping of the outer skin.

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