A portable insulation piercing wire clamp

Abstract

The present invention discloses a portable insulating piercing clamp, which relates to the technical field of piercing clamps. The conductive arc plate is slidably connected in the middle of the second housing along the radial direction of the wire groove. A first elastic member is arranged between the conductive arc plate and the bridge rod fixedly connected to the outside of the second housing. The sliding block is slidably connected to the conductive arc plate along the axial direction of the wire groove. A second elastic member is arranged between the sliding block and the conductive arc plate. There are two relatively distributed peeling assemblies, and each peeling assembly includes a tool rest, a U-shaped blade and an inclined guide member. The U-shaped blade and the inclined guide member are both fixedly connected to the tool rest. The tool rest is slidably connected to the second housing along the guide groove. The double-wedge surface block is slidably connected to the two inclined guide members. The bolt is threadedly connected to the bridge rod, and its end is rotatably connected to the double-wedge surface block. In the present invention, the conductive arc plate connecting the branch cable and the main cable core are conductively connected in a surface contact manner, the connection is firm and reliable, the contact resistance is greatly reduced, and the risk of heat generation at the connection and even causing a fire can be significantly reduced or even eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of puncture wire clamps, in particular to a portable insulation puncture wire clamp. Background Art

[0002] The insulation piercing wire clamp is mainly composed of a reinforced shell, a piercing blade (or spike), a terminal, a sealing gasket, a high-strength bolt, etc. When the cable needs to be branched or connected, determine the branch position of the main line and use a socket wrench to tighten the torque nut on the wire clamp. During the process, the piercing blade or spike will pierce the cable insulation layer and contact the conductor, and the main line and branch line will be connected.

[0003] The patent with announcement number CN210957035U discloses a puncture wire clamp, which includes a base, an upper cover, a puncture blade, a bolt, and a torque nut, characterized in that: the base and the upper cover are respectively provided with a receiving groove for placing the puncture blade, one end of the puncture blade is inserted in the receiving groove, and an arc-shaped convex limiting portion is provided on one end of the puncture blade, the arc-shaped convex limiting portion is engaged in the receiving groove, and constitutes the limiting cooperation between the puncture blade and the base and the upper cover respectively, the other end of the puncture blade is respectively provided with a plurality of puncture teeth extending in the wire pressing groove of the base and the upper cover, and each puncture tooth is provided with silicone grease, and the bolt passes through the base and the upper cover in sequence and is tightened with a torque nut. It has the advantages of simple structure, stable performance, reliable connection, and convenient installation.

[0004] In the prior art such as the above-mentioned patent, the cable connection method using the puncture wire clamp is compared with the traditional cable connection method. The installation of the puncture wire clamp does not require cutting off the main cable and can be directly installed on site, which greatly saves installation time and cost. However, the limitations of the use of the puncture wire clamp are mainly concentrated in the point contact or line contact connection between the puncture wire clamp and the cable, which has the problems of poor contact and increased resistance causing heating. In addition, the contact resistance between the puncture wire clamp and the cable may gradually increase over time. This is caused by factors such as oxidation, corrosion or mechanical vibration. The increase in contact resistance will lead to increased heating, which may damage the cable insulation layer and even cause a fire. Summary of the invention

[0005] The purpose of the present invention is to provide a portable insulation piercing wire clamp to solve the deficiencies in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A portable insulating piercing clamp, comprising a first housing and a second housing that can be joined together to form a wire groove, and a plurality of spikes fixedly connected to the first housing. The second housing is provided with: a conductive arc plate that is slidably connected to the middle of the second housing along the radial direction of the wire groove, and a first elastic member is provided between the conductive arc plate and a bridge rod fixedly connected to the outside of the second housing; a sliding block that is slidably connected to the conductive arc plate along the axial direction of the wire groove, and a second elastic member is provided between the sliding block and the conductive arc plate; two oppositely distributed peeling assemblies, each peeling assembly includes a tool holder, a U-shaped blade and an inclined guide member. The U-shaped blade and the inclined guide member are both fixedly connected to the tool holder, and the tool holder is slidably connected to the second housing along a guide groove. The guide groove includes a connected first section groove, a second section groove and a third section groove. The first section groove and the third section groove are both parallel to the sliding direction of the conductive arc plate, and the second section groove is perpendicular to the first section groove; a double wedge surface block, the two wedge surfaces of which are slidably connected to the inclined guide members of the two peeling assemblies respectively; a bolt that is threadedly connected to the bridge rod, and the end of which is rotatably connected to the double wedge surface block.

[0007] Further, the U-shaped blade includes a straight blade and two parallel arc blades. The arc cutting edges of the two arc blades are coaxial with the wire groove, and the straight blade is perpendicularly connected between the aligned ends of the two arc blades.

[0008] Further, the first elastic member includes a first compression spring, one end of which abuts against the bridge rod and the other end abuts against the conductive arc plate. The elastic force of the first compression spring acts on the conductive arc plate in the direction of sliding the conductive arc plate closer to the wire groove.

[0009] Further, the second elastic member includes a second compression spring, one end of which abuts against the sliding block and the other end abuts against a baffle at the end of the conductive arc plate. The elastic force of the second compression spring acts on the sliding block in the direction of sliding the sliding block closer to the double wedge surface block.

[0010] Further, the side of the conductive arc plate facing the wire groove is an arc surface, and the axis of the arc surface is parallel to the axis of the wire groove.

[0011] Further, a sealing gasket is provided between the nut of the bolt and the bridge rod.

[0012] Further, a sealing strip is provided between the mating surfaces of the first housing and the second housing.

[0013] Further, sealing rings are provided at the mouths at both ends of the wire groove.

[0014] Further, the bolt is a torque bolt.

[0015] Further, a terminal is provided on the first housing or the second housing, and the conductive arc plate and each spike are electrically connected to the terminal.

[0016] In the above technical solution, for a portable insulation piercing wire clamp provided by the present invention, after the first housing and the second housing clamp the main cable together, the bolt is screwed to move the double wedge-shaped block towards the center of the wire groove. The double wedge-shaped block synchronously presses the inclined guides of the two stripping components, so that the two stripping components synchronously move along the first section of the guide groove. The two C-shaped blades that are attached back to back cut open the insulation cortex of the main cable, and the incision is in the shape of a Chinese character '工' (gong). Then, the double wedge-shaped block continues to press the two inclined guides to make the two stripping components move and separate along the second section of the groove. Thus, the two C-shaped blades pry the cut insulation cortex to both sides. The elastic force of the first elastic member is released, causing the conductive arc plate to fit onto the surface of the main cable core between the two C-shaped blades. The elastic force of the second elastic member is released, causing the sliding block to slide between the conductive arc plate and the double wedge-shaped block. Then, the double wedge-shaped block continues to press the two inclined guides to make the two stripping components move along the third section of the groove. At the same time, the double wedge-shaped block contacts and presses the sliding block, and the sliding block presses the conductive arc plate, so that the conductive arc plate is pressed tightly onto the surface of the main cable core and is in close electrical connection with the main cable core.

[0017] For a portable insulation piercing wire clamp provided by the present invention, the conductive arc plate connecting the branch cable is in surface-contact electrical connection with the main cable core. The connection is firm and reliable, greatly reducing the contact resistance, and can significantly reduce or even eliminate the risk of heat generation at the connection and even causing a fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram provided by an embodiment of the present invention;

[0020] Figure 2 It is a top view of the structure provided by an embodiment of the present invention;

[0021] Figure 3 It is a cross-sectional view taken along line A-A before piercing provided by an embodiment of the present invention;

[0022] Figure 4 It is a cross-sectional view taken along line B-B before piercing provided by an embodiment of the present invention;

[0023] Figure 5 It is a cross-sectional view taken along line A-A after piercing provided by an embodiment of the present invention;

[0024] Figure 6 It is a cross-sectional view taken along line B-B after piercing provided by an embodiment of the present invention;

[0025] Figure 7Schematic diagram of the internal structure before puncture provided by an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the internal structure after puncture provided by an embodiment of the present invention;

[0027] Fig. 9 Schematic diagram of the structure of the second housing and the guide groove provided by an embodiment of the present invention;

[0028] Fig.10 Schematic diagram of the structure of the peeling assembly provided by an embodiment of the present invention;

[0029] Fig.11 Schematic diagram of the structure of the C-shaped blade provided by an embodiment of the present invention.

[0030] Explanation of reference numerals:

[0031] 1. First housing; 2. Second housing; 2.1 Bridge rod; 3. Spike; 4. Conductive arc plate; 5. Slide block; 6. First compression spring; 7. Second compression spring; 8. Peeling assembly; 8.1 Tool holder; 8.11 Slide pin; 8.2 C-shaped blade; 8.21 Straight blade; 8.22 Arc blade; 8.3 Inclined guide; 8.4 Guide groove; 8.41 First section groove; 8.42 Second section groove; 8.43 Third section groove; 9. Double-wedge surface block; 10. Bolt; 11. Sealing gasket; 12. Sealing ring; 13. Sealing strip; 14. Terminal. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Please refer to Figure 1-11 , a portable insulating puncture wire clamp provided by an embodiment of the present invention includes a first housing 1 and a second housing 2 that can be joined together to form a wire groove. The first housings 1 are hinged or can be completely separated. After the first housing 1 and the second housing 2 clamp the main cable together, the main cable is located in the wire groove. A sealing strip 13 is provided between the mating surfaces of the first housing 1 and the second housing 2 to form a waterproof seal between the first housing 1 and the second housing 2. Sealing rings 12 are provided at the openings at both ends of the wire groove to form a waterproof seal between the openings at both ends of the wire groove and the main cable. A plurality of spikes 3 are fixedly connected inside the first housing 1. The spikes 3 have the functions of conducting electricity and positioning and anti-slip. A terminal 14 is fixedly provided on the first housing 1 or the second housing 2. Each spike 3 is electrically connected to the terminal 14. The first housing 1, the second housing 2 and the bridge rod 2.1 are all made of insulating materials.

[0034] The portable insulated piercing clamp further includes a conductive arc plate 4, a sliding block 5, two oppositely distributed peeling assemblies 8, a double-wedge surface block 9, and a torque bolt 10. Among them, the conductive arc plate 4 is slidably connected to the middle of the second housing 2 along the radial direction of the wire groove. Specifically, it is realized by the sliding fit between the first convex block provided on the conductive arc plate 4 and the first sliding groove opened on the inner wall of the second housing 2. The latter can be realized by other sliding structures in the prior art. The conductive arc plate 4 is electrically connected to the terminal 14. The side of the conductive arc plate 4 facing the wire groove is an arc surface, and the axis of the arc surface is parallel to the axis of the wire groove. A first elastic member is provided between the conductive arc plate 4 and the bridge rod 2.1 on the second housing 2. The bridge rod 2.1 is fixedly connected to the outside of the second housing 2. The first elastic member is preferably a first compression spring 6, one end of which abuts on the bridge rod 2.1 and the other end abuts on the conductive arc plate 4. The elastic force of the first compression spring 6 acts on the conductive arc plate 4 in the direction of sliding the conductive arc plate 4 closer to the wire groove.

[0035] The sliding block 5 is slidably connected to the conductive arc plate 4 along the axial direction of the wire groove. Specifically, it is realized by the sliding fit between the second convex block provided on the sliding block 5 and the second sliding groove opened on the conductive arc plate 4. Of course, other sliding structures in the prior art can also be used. A second elastic member is provided between the sliding block 5 and the conductive arc plate 4. The second elastic member is preferably a second compression spring 7, one end of which abuts on the sliding block 5 and the other end abuts on the baffle at the end of the conductive arc plate 4. The elastic force of the second compression spring 7 acts on the sliding block 5 in the direction of sliding the sliding block 5 closer to the double-wedge surface block 9.

[0036] Two oppositely distributed peeling assemblies 8, refer to Figure 10-11 , each peeling assembly 8 includes a tool holder 8.1, a U-shaped blade 8.2 and an inclined guide 8.3. The tool holder 8.1 and the inclined guide 8.3 are preferably made of insulating materials. The U-shaped blade 8.2 and the inclined guide 8.3 are both fixedly connected to the tool holder 8.1. The U-shaped blade 8.2 includes a straight blade 8.21 and two parallel arc blades 8.22. The arc cutting edges of the two arc blades 8.22 are coaxial with the wire groove. The straight blade 8.21 is perpendicularly connected between the aligned ends of the two arc blades 8.22. The tool holder 8.1 is slidably connected to the second housing 2 along the guide groove 8.4, that is, the sliding pin 8.11 fixedly connected to the end of the tool holder 8.1 is slidably connected in the guide groove 8.4, refer to Fig. 9 , the guide groove 8.4 includes a first section groove 8.41, a second section groove 8.42 and a third section groove 8.43 connected in sequence. Both the first section groove 8.41 and the third section groove 8.43 are parallel to the sliding direction of the conductive arc plate 4, and both the first section groove 8.41 and the third section groove 8.43 are perpendicular to the second section groove 8.42.

[0037] The double-wedge surface block 9 is also made of insulating material and has two symmetrically distributed wedge surfaces. The two wedge surfaces of the double-wedge surface block 9 are slidably connected to the inclined surfaces of the inclined guides 8.3 of the two stripping assemblies 8 in a one-to-one correspondence. The torque bolt 10 or other ordinary bolt 10 is threadedly connected to the bridge rod 2.1, and its end is rotatably connected to the double-wedge surface block 9. A gasket 11 is provided between the nut of the torque bolt 10 and the bridge rod 2.1.

[0038] When the present invention is in use, the first housing 1 and the second housing 2 clamp the main cable together and are locked by screws. Refer to Figure 3-4 , Figure 7 , at this time, the U-shaped blades 8.2 of the two stripping assemblies 8 are attached back to back, that is, the straight blades 8.21 are attached together. The two U-shaped blades 8.2 are in an overall I-shape. The sliding pin 8.11 is located at one end of the first section 8.41 of the corresponding guide groove 8.4 away from the second section 8.42. The conductive arc plate 4 abuts against the two juxtaposed tool holders 8.1 under the elastic force of the first compression spring 6. The sliding block 5 abuts against the side surface of the double-wedge surface block 9 under the elastic force of the second compression spring 7. Then, continuously screw the outer nut of the torque bolt 10. The threaded action between the torque bolt 10 and the bridge rod 2.1 enables the torque bolt 10 to move along its axial direction. Thus, the torque bolt 10 moves the double-wedge surface block 9 towards the center of the wire groove. The two wedge surfaces of the double-wedge surface block 9 synchronously squeeze the inclined guides 8.3 of the two stripping assemblies 8, causing the two stripping assemblies 8 to move synchronously along the first section 8.41 of the guide groove 8.4. The two U-shaped blades 8.2 attached back to back cut the insulating cortex of the main cable, and the incision of the insulating cortex is in an I-shape. Then, the double-wedge surface block 9 continues to squeeze the two inclined guides 8.3 to cause the two stripping assemblies 8 to move along the second section 8.42 and separate. Thus, the two U-shaped blades 8.2 pry the cut insulating cortex to both sides. At the same time, the two tool holders 8.1 no longer block the conductive arc plate 4, and the elastic force of the first elastic member is released, causing the conductive arc plate 4 and the sliding block 5 on the conductive arc plate 4 to move from between the two U-shaped blades 8.2 towards the main cable core. Thus, the conductive arc plate 4 fits onto the surface of the stripped main cable core, and the sliding block 5 is disengaged from the abutment with the double-wedge surface block 9. Thus, the elastic force of the second elastic member is released, causing the sliding block 5 to slide between the conductive arc plate 4 and the double-wedge surface block 9. Then, the double-wedge surface block 9 continues to squeeze the two inclined guides 8.3 to cause the two stripping assemblies 8 to move along the third section 8.43. At the same time, the side of the double-wedge surface block 9 away from the torque bolt 10 contacts and squeezes the sliding block 5, and the sliding block 5 transmits the pressure to the conductive arc plate 4, thereby pressing the conductive arc plate 4 tightly onto the surface of the main cable core and making a tight conductive connection with the main cable core until the outer nut of the torque bolt 10 is broken. Refer to Figure 5-6 , Figure 8 , at this time, the inner end face of the inner nut of the torque bolt 10 is pressed against the surface of the bridge rod 2.1 through the gasket 11, so as to perform waterproof sealing between the threaded hole on the bridge rod 2.1 and the torque bolt 10.

[0039] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A portable insulation piercing wire clamp, comprising a first shell and a second shell that can be combined to form a wire groove, and a plurality of spikes fixedly connected to the first shell, characterized in that: The following are provided on the second housing: A conductive arc plate, which is slidably connected to the middle of the second housing along the radial direction of the wire groove. A first elastic member is provided between the conductive arc plate and the bridge rod fixedly connected to the outside of the second housing; A sliding block, which is slidably connected to the conductive arc plate along the axial direction of the wire groove. A second elastic member is provided between the sliding block and the conductive arc plate; Two oppositely distributed peeling assemblies, each peeling assembly includes a tool holder, a U-shaped blade and an inclined guide member. Both the U-shaped blade and the inclined guide member are fixedly connected to the tool holder. The tool holder is slidably connected to the second housing along the guide groove. The guide groove includes a connected first section groove, a second section groove and a third section groove. Both the first section groove and the third section groove are parallel to the sliding direction of the conductive arc plate, and the second section groove is perpendicular to the first section groove; A double wedge surface block, the two wedge surfaces of which are slidably connected to the inclined guide members of the two peeling assemblies respectively; A bolt, which is threadedly connected to the bridge rod, and the end thereof is rotatably connected to the double wedge surface block; The first elastic member includes a first compression spring, one end of which abuts against the bridge rod, and the other end abuts against the conductive arc plate. The elastic force of the first compression spring acts on the conductive arc plate in the direction of sliding the conductive arc plate closer to the wire groove; The second elastic member includes a second compression spring, one end of which abuts against the sliding block, and the other end abuts against the baffle at the end of the conductive arc plate. The elastic force of the second compression spring acts on the sliding block along the direction of sliding the sliding block closer to the double wedge surface block; 2. A portable insulation piercing clamp according to claim 1, characterized in that: The U-shaped blade includes a straight blade and two parallel arc blades. The arc cutting edges of the two arc blades are coaxial with the wire groove, and the straight blade is vertically connected between the aligned ends of the two arc blades; 3. A portable insulation piercing clamp according to claim 1, characterized in that: The side of the conductive arc plate facing the wire groove is an arc surface, and the axis of the arc surface is parallel to the axis of the wire groove; 4. A portable insulation piercing clamp according to claim 1, characterized in that: A gasket is provided between the nut of the bolt and the bridge rod; 5. The portable insulation piercing clamp according to claim 1, characterized in that: A sealing strip is provided between the mating surfaces of the first housing and the second housing; 6. A portable insulation piercing clamp according to claim 1, characterized in that: Sealing rings are provided at the openings at both ends of the wire groove; 7. A portable insulation piercing clamp according to claim 1, characterized in that: The bolt is a torque bolt; 8. The portable insulation piercing clamp according to claim 1, characterized in that: A terminal is provided on the first housing or the second housing, and the conductive arc plate and each spike are electrically connected to the terminal.

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