Wire pulling pliers for secondary cable maintenance

Abstract

The utility model discloses a pair of wire pulling pliers for secondary cable maintenance, and relates to the technical field of power system equipment maintenance. The clamp structurally comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body each comprise a clamp handle and a clamp handle, and rectangular notches perpendicular to the direction of the first pin shaft are formed in the tip ends of the two clamp handles of the first clamp body and the second clamp body. Pin holes are formed in two side walls of the rectangular notch; and a cam chuck is rotationally mounted in the pin hole through a second pin shaft. According to the utility model, the cam chuck is arranged at the end part of the wire pulling pliers and is made of a rubber material, so that the damage to the surface of a cable in the operation process can be effectively avoided, and meanwhile, the rubber has good insulating property, so that the risk of electric shock of operators is reduced; the design of the cam chuck increases the surface area in contact with the cable, and the cam chuck can further extrude the cable along with the swinging of the cable during force application, thereby increasing the friction force between the wire pulling pliers and the cable, and effectively preventing the slippage phenomenon.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric power system equipment overhauling technical field, especially, relate to a wire pulling pliers for secondary cable overhauling. BACKGROUND

[0002] In the stable operation process of electric power system, electrical secondary equipment plays a vital role, and the reliability of the wiring of secondary cable as the key link connecting these devices is directly related to the safety and stability of electric power system. The maintenance regulations clearly require that the cable wiring reliability check must be carried out during equipment maintenance, and the wire pulling is the most effective method to test whether the secondary cable wiring is reliable. However, in actual operation, there is no special tool for secondary cable wire pulling, so the operators generally use the method of pulling wire by hand or using pointed pliers. Pulling wire by hand not only has the risk of electric shock, but also easily hurts hands; and using pointed pliers to pull wire, because the sharp head is front serrated, it is easy to damage the cable, and the static friction coefficient between the existing iron pointed pliers and the cable surface is relatively small, the static friction coefficient between the rubber and the cable surface is relatively small, so it is easy to slip in the process of pulling wire, which affects the pulling effect and safety. Therefore, it has become an urgent problem to develop a special tool for secondary cable wire pulling which can ensure safe and reliable operation, effectively protect the cable from damage and improve work efficiency. SUMMARY

[0003] The utility model aims at providing a wire pulling pliers for secondary cable overhauling, which realizes safer, more efficient and more reliable secondary cable wire pulling operation by setting cam chuck.

[0004] To solve the above technical problems, the utility model is realized by the following technical scheme:

[0005] The utility model relates to a wire pulling pliers for secondary cable overhauling, which comprises a first pliers body and a second pliers body, the first pliers body and the second pliers body each comprise a pliers handle and a pliers handle, the connection between the pliers handle and the pliers handle is a hinge point, the first pliers body and the second pliers body are hinged through a first pin shaft, the two pliers handle tip portions of the first pliers body and the second pliers body are each provided with a rectangular notch perpendicular to the direction of the first pin shaft, the two side walls of the rectangular notch are provided with pin holes, and the pin holes are rotationally installed with a cam chuck through a second pin shaft.

[0006] As a preferred technical scheme of the utility model, the cam chuck comprises a single-ear portion connected with the second pin shaft; a clamping portion is integrally formed on the upper middle portion to the bottom point of one side of the single-ear portion; the connecting surface of the clamping portion and the single-ear portion is a flat surface matched with the occlusal inner wall of the handle; the side surface of the clamping portion away from the single-ear portion is provided with a circular arc surface from the middle portion to the bottom; a plurality of anti-skid grooves are formed on the outer wall of the circular arc surface along the arc direction; and a semicircular arc end surface is arranged on the upper end of the clamping portion.

[0007] As a preferred technical scheme of the utility model, the swing range between the cam chuck and the occlusal inner wall of the handle is 0-30°.

[0008] As a preferred technical scheme of the utility model, the outer wall of the handle is wrapped with an insulating sleeve.

[0009] As a preferred technical scheme of the utility model, the material of the cam chuck is rubber; and an iron pipe matched with the second pin shaft is embedded and fixed in the ear hole of the single-ear portion.

[0010] The utility model has the following beneficial effects:

[0011] The utility model installs the cam chuck at the end of the wire stripper, adopts the rubber material, this design can effectively avoid the damage to the surface of the cable in the operation process, meanwhile, the rubber has good insulation performance, reduces the risk of electric shock of the operator.

[0012] The design of the cam chuck of the utility model increases the surface area in contact with the cable, and when the force is applied, the cable can be further pressed to the cable, thereby increasing the friction between the wire stripper and the cable, and effectively preventing the occurrence of the slipping phenomenon.

[0013] The utility model embeds and fixes the iron pipe matched with the second pin shaft in the ear hole of the single-ear portion, such design can reduce the direct friction between the cam chuck and the second pin shaft, prolongs the service life of the tool.

[0014] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Figure 1The utility model is used for the structure schematic drawing of wire stripper for secondary cable maintenance.

[0017] Figure 2 It is the end part local schematic drawing of wire stripper closed state.

[0018] Figure 3 It is the local schematic drawing of the maximum opening angle state between cam chuck and handle.

[0019] Figure 4 It is the local schematic drawing of handle end part.

[0020] Figure 5 It is the structure schematic drawing of cam chuck.

[0021] In the drawing, the component list represented by each sign is as follows:

[0022] 1-first handle body, 2-second handle body, 3-handle, 4-handle, 5-first pin shaft, 6-insulating sleeve, 7-second pin shaft, 8-cam chuck, 31-rectangular notch, 32-pin hole, 81-single ear part, 82-clamping part, 83-anti-skid groove. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. Specific embodiment one:

[0025] Please refer to Figures 1-5 As shown in the figure, the utility model is a wire stripper for secondary cable maintenance, which comprises a first handle body 1 and a second handle body 2. The first handle body 1 and the second handle body 2 both comprise a handle 3 and a handle 4, and the connection between the handle 3 and the handle 4 is a hinge point. The first handle body 1 and the second handle body 2 are hinged through a first pin shaft 5, and the two handle 3 tip parts of the first handle body 1 and the second handle body 2 are both provided with a rectangular notch 31 perpendicular to the direction of the first pin shaft 5. The two side walls of the rectangular notch 31 are provided with pin holes 32. The pin holes 32 are rotatably installed with a cam chuck 8 through a second pin shaft 7. The outer wall of the handle 4 is wrapped with an insulating sleeve 6.

[0026] The cam chuck 8 comprises a single-ear portion 81 matched with the second pin shaft 7, and the width of the single-ear portion 81 matches the width of the rectangular notch 31. The single-ear portion 81 is integrally formed with a clamping portion 82 at the upper middle portion to the bottom of one side. The connecting surface of the clamping portion 82 and the single-ear portion 81 is a flat surface matched with the inner wall of the jaw 3. The side surface of the clamping portion 82 away from the single-ear portion 81 is set as a circular arc surface from the middle portion to the bottom. The outer wall of the circular arc surface is provided with a plurality of anti-skid grooves 83 along the arc direction. The upper end of the clamping portion 82 is provided with a semicircular arc end surface. The width of the clamping portion 82 is greater than the width of the end portion of the jaw 3. In order to insulate and increase the friction between the cam chuck 8 and the wire, the material of the cam chuck 8 is selected as rubber. According to the swing angle range between the clamping portion 82 and the jaw 3 and the inner wall of the jaw 3, the swing angle range between the cam chuck 8 and the jaw 3 is 0-30°.

[0027] The two cam chucks 8 of the wire stripper directly contact the cable in the wire pulling operation, and do not cause damage to the surface of the cable. In addition, when force is applied in the wire pulling operation, the cable has a tendency to drive the cam chucks 8 to swing, the swinging of the cam chucks 8 further presses the cable, and the friction between the wire stripper and the cable is increased again, so that the slipping of the cable in the clamping process of the wire stripper is effectively avoided.

[0028] In order to reduce the wear between the cam chuck 8 and the second pin shaft 7, an iron pipe matched with the second pin shaft 7 is embedded and fixed in the ear hole of the single-ear portion 81.

[0029] In the description of the specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation manner described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A wire pulling pliers for secondary cable maintenance, comprising a first plier body (1) and a second plier body (2); the first plier body (1) and the second plier body (2) each comprise a plier handle (3) and a plier grip (4), the connection between the plier handle (3) and the plier grip (4) is a hinge point, the first plier body (1) and the second plier body (2) are hinged through a first pin shaft (5), characterized in that: the two plier handle (3) tip portions of the first plier body (1) and the second plier body (2) are each provided with a rectangular notch (31) perpendicular to the direction of the first pin shaft (5); the two side walls of the rectangular notch (31) are provided with pin holes (32); the pin holes (32) are rotatably installed with a cam chuck (8) through a second pin shaft (7). The cam chuck (8) comprises a single-ear portion (81) connected with the second pin shaft (7); the single-ear portion (81) is integrally formed with a clamping portion (82) on one side from the middle upper portion to the bottom point; the connecting surface of the clamping portion (82) and the single-ear portion (81) is a flat surface matched with the occlusal inner wall of the plier handle (3); the side surface of the clamping portion (82) away from the single-ear portion (81) is set as a circular arc surface from the middle portion to the bottom portion; the outer wall of the circular arc surface is provided with a plurality of anti-skid grooves (83) along the arc direction thereof; the upper end of the clamping portion (82) is provided with a semicircular arc end face.

2. The wire pulling pliers for secondary cable maintenance according to claim 1, characterized by, The swinging range between the cam chuck (8) and the occlusal inner wall of the plier handle (3) is 0-30°.

3. Wire pulling pliers for secondary cable repair according to claim 1 or 2, characterized in that The outer wall of the plier grip (4) is wrapped with an insulating sleeve (6).

4. The tool according to claim 1, wherein, The material of the cam chuck (8) is rubber; an iron pipe matched with the second pin shaft (7) is embedded and fixed in the ear hole of the single-ear portion (81).

5. The wire pulling pliers for secondary cable maintenance according to claim 2, characterized by, ​

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