Fixed-distance cutting equipment for power cable

Abstract

The invention relates to the technical field of cable cutting, and discloses power cable fixed-distance cutting equipment which comprises a clamping part, the clamping part comprises a base, a clamping piece and a cutting part are arranged above the base, the clamping piece can be used for clamping the outer surface of the circumference of an external cable, and the cutting part comprises a rack. The bottom of the machine frame is fixedly connected with the upper surface of the base, and the top of the machine frame is fixedly connected with a cutting piece which can be used for conducting fixed-length cutting on the outer surface of the circumference of an external cable. The fixed-distance cutting equipment for the power cable can effectively solve the problems that in the prior art, cable shears can cause damage to an insulating layer, in addition, a cable is prone to abrasion at a leading-out part, the failure rate of the cable is increased, the cutting speed and angle of the cable shears are not easy to control, the extrusion force of a blade can cause serious deformation of a cable notch, and the cutting efficiency is poor. The internal structure may be damaged, and then signal output deformation is caused.

Description

Technical Field

[0001] The invention relates to the technical field of cable cutting, and in particular to a fixed-distance cutting device for power cables. Background Art

[0002] Cable cutters are pliers specially used for cutting cables. They have two staggered blades that can be opened and closed. This tool is designed using the principle of leverage and the principle that pressure is inversely proportional to area. It is suitable for cutting high-voltage PE, IV cables, telephone cables, etc. The blades of cable cutters are usually made of high-carbon steel or tungsten alloy steel, which is strong and durable.

[0003] During use, conventional cable cutters will not only damage the insulation layer, but also easily cause wear and tear at the lead-out part of the cable, thereby increasing the failure rate of the cable. Moreover, the cutting speed and angle of the cable cutters are difficult to control, and the squeezing force of the blades will cause serious deformation of the cable cut, and its internal structure may be damaged, thereby causing deformation of the signal output. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a fixed-distance cutting device for power cables, which can effectively solve the problem in the prior art that the cable cutter not only causes damage to the insulation layer, but also the cable line is easily worn at the lead-out part, thereby increasing the failure rate of the cable, and the cutting speed and angle of the cable cutter are not easy to control, and the squeezing force of the blade will cause serious deformation of the cable incision, and its internal structure may be damaged, thereby causing signal output deformation. Technical Solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a fixed-distance cutting device for power cables, comprising: A clamping part, the clamping part comprises a base, and a clamping piece which can be used for clamping the outer circumference of the external cable is arranged above the base; A cutting part, the cutting part comprising a frame, the bottom of the frame is fixedly connected to the upper surface of the base, and the top of the frame is fixedly connected with a cutting piece that can be used to cut the outer surface of the circumference of the external cable to a fixed length; Wherein, the cutting piece comprises a gear ring, the circumferential outer surface of the gear ring is fixedly connected to the top of the frame, a planetary gear is meshingly mounted on the inner side of the gear ring, and the outer end of the planetary gear is fixedly connected to the cutter via a connecting rod.

[0006] Furthermore, the clamping member includes a cylinder, which is fixedly connected to the upper surface of the base through a bracket arranged on its circumferential outer surface. A cylinder is installed on the circumferential outer surface of the cylinder, and a clamp is fixedly connected to the output end of the cylinder, and the clamp is located in the working cavity of the cylinder.

[0007] Furthermore, there are three groups of planetary gears in total. A planetary gear frame is rotatably installed at one end of the planetary gear away from the cutter, a sun gear meshing with the planetary gear is arranged on the side of the planetary gear frame close to the cutter, and a material guide pipe rotatably connected to the inside of the planetary gear frame is fixedly connected to the side of the sun gear close to the cylinder.

[0008] Furthermore, the central axis of the circular space surrounded by the cylinder and the clamping plate coincides with the central axis of the material guide tube, and the material guide tube has an arc edge design at one end close to the cylinder.

[0009] Furthermore, a limiting ring close to the outer surface of the planetary gear carrier is sleeved on the circumferential outer surface of the material guide tube, and the limiting ring and the sun gear are respectively located on both sides of the planetary gear carrier.

[0010] Furthermore, the outer circumferential surface of the guide tube is fixedly connected to a gear ring via an inner support rod, a driving unit transmission-connected to the gear ring is arranged above the base, and a slider rotatably mounted to the outer circumferential surface of the gear ring is arranged on the outer side of the planetary gear frame.

[0011] Furthermore, the cutter includes a counterweight plate, the outer surface of which is fixedly connected to the connecting rod at the outer end of the planetary gear, a built-in groove is provided on the side of the counterweight plate away from the planetary gear, the inner wall of the built-in groove is connected to a built-in block for damping sliding, a blade is fixedly connected to the outer side of the built-in block, and a strong spring connected to the inner wall of the built-in groove is provided on the side of the built-in block.

[0012] Furthermore, a limiting plate close to the outer surface of the blade is fixedly connected to the side of the counterweight plate close to the built-in groove, and the blade adopts an arc-edge blade type design. Beneficial Effects

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a cutting part. Planetary gears refer to a gear system whose rotation axis can rotate around its own rotation axis like a "fixed axis gear", and whose rotation axis can also rotate around the axis of the ring gear along with the planetary gear frame; the rotation around its own axis is called "autorotation", and the rotation around the axis of the ring gear is called "revolution". The planetary gear drives the cutter to rotate while revolving and rotating rapidly. The blade on the cutter does not contact the outer surface of the cable. With the rotation of the planetary gear, the counterweight plate is driven to rotate rapidly, and the built-in block and the blade are driven to rotate synchronously. When the counterweight plate reaches the initial set speed, under the action of centrifugal force, the built-in block slides outward along the inner wall of the built-in groove, and the strong spring is compressed to undergo elastic deformation until the two reach a balanced state. As the counterweight plate speeds up slowly and continuously, under the action of centrifugal force, the blade begins to slowly move closer to one side of the cable. At the same time, the cutting depth of the blade on the cable continues to increase until the counterweight plate reaches the rated speed. The limiting boss inside the built-in groove limits the built-in block, and the blade completes the cutting of the cable. The cutting angle is neat and consistent, and no extrusion occurs near the cut, which greatly improves the cutting accuracy of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 It is a schematic diagram of a three-dimensional multi-angle structure of an embodiment of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of a clamping member according to an embodiment of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of a cutting piece according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the three-dimensional partial separation of the cutting piece according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the blade and the built-in groove being three-dimensionally separated according to an embodiment of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of a planetary gear, a cutter and a planetary gear carrier according to an embodiment of the present invention.

[0016] The numbers in the figure represent respectively: 1, clamping part; 11, base; 111, driving unit; 12, clamping piece; 121, cylinder; 122, bracket; 123, cylinder; 124, clamping plate; 2, cutting part; 21, frame; 22, cutting piece; 221, ring gear; 222, planetary gear; 223, cutter; 2231, counterweight plate; 2232, built-in groove; 2233, built-in block; 2234, blade; 2235, strong spring; 2236, limit plate; 224, planetary gear frame; 2241, slider; 225, sun gear; 226, guide pipe; 2261, limit ring; 2262, ring gear. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments. Example

[0019] See also Figure 1-Figure 7 The present invention provides a technical solution: a fixed-distance cutting device for power cables, comprising: The clamping part 1 comprises a base 11, and a clamping member 12 is arranged above the base 11 for clamping the outer surface of the circumference of the external cable; The cutting part 2 includes a frame 21, the bottom of the frame 21 is fixedly connected to the upper surface of the base 11, and the top of the frame 21 is fixedly connected with a cutting piece 22 that can be used to cut the outer surface of the circumference of the external cable to a fixed length; The cutting piece 22 includes a gear ring 221, the outer circumferential surface of the gear ring 221 is fixedly connected to the top of the frame 21, a planetary gear 222 is meshedly mounted on the inner side of the gear ring 221, and the outer end of the planetary gear 222 is fixedly connected to the cutter 223 via a connecting rod.

[0020] The clamping member 12 includes a cylinder 121, which is fixedly connected to the upper surface of the base 11 through a bracket 122 arranged on the outer surface of the cylinder 121. A cylinder 123 is installed on the outer surface of the cylinder 121. The output end of the cylinder 123 is fixedly connected to a clamping plate 124, and the clamping plate 124 is located in the working chamber of the cylinder 121. When the cylinder 123 on the clamping member 12 is started, the output end drives the clamping plate 124 to move downward for a short distance, driving the clamping plate 124 to press the outer surface of the cable, so that the cable and the clamping member 12 are combined into a whole, thereby improving the cutting accuracy.

[0021] There are three groups of planetary gears 222. A planetary gear frame 224 is rotatably installed at one end of the planetary gear 222 away from the cutter 223. A sun gear 225 meshing with the planetary gear 222 is provided on the side of the planetary gear frame 224 close to the cutter 223. The ring gear 221, the planetary gear 222, the sun gear 225, etc. cooperate to enable the cutter 223 to revolve and rotate while rotating rapidly on its own axis. The rotation around its own axis is called "rotation", and the rotation around the axis of the ring gear 221 is called "revolution". The sun gear 225 is fixedly connected to a material guide pipe 226 rotatably connected to the inside of the planetary gear frame 224 on the side close to the cylinder 121.

[0022] The central axis of the circular space enclosed by the cylinder 121 and the clamping plate 124 coincides with the central axis of the material guide tube 226 , and the end of the material guide tube 226 close to the cylinder 121 adopts an arc edge design.

[0023] A limiting ring 2261 close to the outer surface of the planetary gear carrier 224 is sleeved on the circumferential outer surface of the guide tube 226 , and the limiting ring 2261 and the sun gear 225 are respectively located on both sides of the planetary gear carrier 224 .

[0024] The outer circumferential surface of the guide tube 226 is fixedly connected to the gear ring 2262 through an inner support rod, a driving unit 111 is arranged above the base 11, and a slider 2241 is arranged on the outer side of the planetary gear carrier 224 and is rotatably mounted on the outer circumferential surface of the gear ring 221 to ensure smooth rotation of the planetary gear carrier 224.

[0025] The cutter 223 includes a counterweight plate 2231, which maintains stable movement and provides sufficiently large inertia. The outer surface of the counterweight plate 2231 is fixedly connected to the connecting rod at the outer end of the planetary gear 222. A built-in groove 2232 is provided on the side of the counterweight plate 2231 away from the planetary gear 222. The inner wall of the built-in groove 2232 is connected to a built-in block 2233 in a damping sliding manner. A blade 2234 is fixedly connected to the outer side of the built-in block 2233. A strong spring 2235 connected to the inner wall of the built-in groove 2232 is provided on the side of the built-in block 2233.

[0026] The counterweight plate 2231 is fixedly connected to a limit plate 2236 close to the outer surface of the blade 2234 near the built-in groove 2232 to prevent the blade 2234 from vibrating violently during the cutting process and damaging the blade 2234. The blade 2234 adopts an arc-edge blade design to facilitate the switching of the blade 2234. During the switching process of the blade 2234, the cable will be cut.

[0027] refer to Figure 1-7 Conventional cable cutters will not only damage the insulation layer during use, but also easily wear the cable at the lead-out part, thereby increasing the failure rate of the cable. Moreover, the cutting speed and angle of the cable cutter are difficult to control, and the extrusion force of the blade will cause serious deformation of the cable cut, and its internal structure may be damaged, thereby causing signal output deformation. In order to overcome the above-mentioned defects, the present invention designs a fixed-distance cutting device for power cables.

[0028] Cable loading: In practical applications, mark points are made on the outer surface of the cable to be cut, and measuring tools such as rulers and tape measures can be used to mark the distances. Then, one end of the marked cable is passed through the space surrounded by the cylinder 121 and the clamping plate 124, and then through the guide tube 226 on the cutting piece 22, through the sun gear 225 and extended to the outside until the mark point on the outer surface of the cable corresponds to the cutting point of the cutter 223. The cylinder 123 on the clamping piece 12 is started, and its output end drives the clamping plate 124 to move downward for a short distance, driving the clamping plate 124 to press the circumferential outer surface of the cable, and the cable and the clamping piece 12 are combined into a whole, thereby improving the cutting accuracy.

[0029] Cable cutting: The driving unit 111 is started, and its output end drives the gear ring 2262 to perform circular motion through the gear, driving the guide tube 226 to rotate around the inside of the planetary gear frame 224 (the limit ring 2261 and the sun gear 225 are respectively located on both sides of the planetary gear frame 224, and the planetary gear frame 224 acts as a "support" for the guide tube 226), driving the sun gear 225 to rotate, and the sun gear 225 drives the three sets of planetary gears 222 to rotate synchronously around the inside of the gear ring 221 (the planetary gears 222 refer to a gear system that can rotate around their own rotation axes like "fixed axis gears", and their rotation axes also rotate around the axis of the gear ring 221 with the planetary gear frame 224; the rotation around its own axis is called "autorotation", and the rotation around the axis of the gear ring 221 is called "revolution"). The planetary gears 222 drive the cutter 223 to rotate while orbiting and rotating rapidly, so as to cut the marked points on the outer surface of the cable.

[0030] Initially, the blade 2234 on the cutter 223 does not contact the outer surface of the cable. As the planetary gear 222 rotates, the counterweight plate 2231 rotates rapidly, driving the built-in block 2233 and the blade 2234 to rotate synchronously. When the counterweight plate 2231 reaches the initial set speed, under the action of centrifugal force, the built-in block 2233 slides outward along the inner wall of the built-in groove 2232, and the strong spring 2235 is compressed and elastically deformed until the two reach a balanced state. At this time, the blade 2234 begins to contact the outer surface of the cable and performs a preliminary cutting on the outer surface of the wire. As the counterweight plate 2231 is continuously and slowly accelerated, under the action of centrifugal force, the blade 2234 begins to slowly move toward one side of the cable. At the same time, the cutting depth of the cable by the blade 2234 continues to increase until the counterweight plate 2231 reaches the rated speed. The limiting boss inside the built-in groove 2232 limits the built-in block 2233 (to avoid collision between the blades 2234), and the blade 2234 completes the cutting of the cable. The cutting angle is neat and consistent, and no extrusion occurs near the incision, thereby greatly improving the cutting accuracy of the cable.

[0031] The present application adopts the cutting piece 22, which has the following advantages: Advantage 1: The ring gear 221, the planetary gear 222, the sun gear 225 and the like cooperate to realize that the cutter 223 can rotate and revolve while rotating rapidly (rotation around its own axis is called "rotation", and rotation around the axis of the ring gear 221 is called "revolution"). At the same time, the centrifugal force and the strong spring 2235 work together to realize the "gradual" circular cutting of the blade 2234.

[0032] Advantage 2: There are three groups of cutters 223 in total. The three groups of cutters 223 rotate and cut synchronously around the outer surface of the cable. Compared with the traditional single flywheel cutting, the cutting part of the cable is subjected to more uniform force (simultaneous pressure in three directions), the cutting speed is faster, the accuracy is higher, and the deviation of the cutting part is avoided.

[0033] Advantage three: during the circular cutting process of the cutter 223, the cutter 223 itself also rotates, and the blade 2234 is continuously rotated to switch. The blade 2234 adopts an arc-edge blade design, so that the cutting part of the cable line continuously maintains a "double cutting" mode, and the cutting speed is faster and the precision is higher (multiple sets of blades 2234 work synchronously).

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixed-length cutting device for power cables, characterized in that: include: A clamping portion (1), the clamping portion (1) comprising a base (11), a clamping piece (12) being arranged above the base (11) and being used for clamping the circumferential outer surface of an external cable; A cutting section (2), the cutting section (2) comprising a frame (21), the bottom of the frame (21) being fixedly connected to the upper surface of the base (11), and the top of the frame (21) being fixedly connected with a cutting piece (22) that can be used to cut the outer surface of the circumference of the external cable to a fixed length; The cutting piece (22) comprises a gear ring (221), the circumferential outer surface of the gear ring (221) is fixedly connected to the top of the frame (21), a planetary gear (222) is meshingly mounted on the inner side of the gear ring (221), and the outer end of the planetary gear (222) is fixedly connected to the cutter (223) via a connecting rod; The clamping member (12) comprises a cylinder (121), the cylinder (121) being fixedly connected to the upper surface of the base (11) via a bracket (122) arranged on the outer circumferential surface of the cylinder (121), a cylinder (123) being mounted on the outer circumferential surface of the cylinder (121), a clamping plate (124) being fixedly connected to the output end of the cylinder (123), and the clamping plate (124) being located in the working chamber of the cylinder (121); The planetary gears (222) are provided with three groups in total. A planetary gear frame (224) is rotatably mounted on one end of the planetary gears (222) away from the cutter (223). A sun gear (225) meshing with the planetary gears (222) is provided on the side of the planetary gear frame (224) close to the cutter (223). A material guide pipe (226) rotatably connected to the inside of the planetary gear frame (224) is fixedly connected to the side of the sun gear (225) close to the barrel (121). The outer circumferential surface of the guide tube (226) is fixedly connected to a gear ring (2262) via an inner support rod; a driving unit (111) drivingly connected to the gear ring (2262) is provided above the base (11); and a sliding block (2241) rotatably mounted to the outer circumferential surface of the gear ring (221) is provided on the outer side of the planetary gear carrier (224); The cutter (223) comprises a counterweight plate (2231), the outer surface of the counterweight plate (2231) being fixedly connected to a connecting rod at the outer end of the planetary gear (222), a built-in groove (2232) being provided on a side of the counterweight plate (2231) away from the planetary gear (222), a built-in block (2233) being connected to the inner wall of the built-in groove (2232) in a damping sliding manner, a blade (2234) being fixedly connected to the outer side of the built-in block (2233), and a strong spring (2235) connected to the inner wall of the built-in groove (2232) being provided on the side surface of the built-in block (2233); A limiting plate (2236) close to the outer surface of the blade (2234) is fixedly connected to the side of the counterweight plate (2231) close to the built-in groove (2232), and the blade (2234) adopts an arc-edge blade type design.

2. The central axis of the circular space enclosed by the cylinder (121) and the clamping plate (124) coincides with the central axis of the material guide tube (226), and the end of the material guide tube (226) close to the cylinder (121) adopts an arc edge design.

3. The fixed-distance cutting device for power cables according to claim 1, characterized in that: The circumferential outer surface of the material guide tube (226) is sleeved with a limiting ring (2261) that is close to the outer surface of the planetary gear carrier (224); the limiting ring (2261) and the sun gear (225) are respectively located on both sides of the planetary gear carrier (224).

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