Power transmission line insulator replacing tongs with anti-skid positioning claws

Abstract

The utility model relates to transmission line maintenance tool technical field discloses a transmission line insulator replacement pincers with antiskid positioning claw, device includes two pincing arms connected through hinged axle, and pincing arm lower extreme connects handle. The operating end of pincing arm is fixed with antiskid positioning mechanism, and the mechanism includes installation base, wedge slide, reset spring and wedge clamping jaw main body, the wedge clamping jaw main body is slidably fitted in the inclined plane of wedge slide and is connected through spring elasticity, its clamping surface is equipped with the positioning camber surface with antiskid tooth, and the handle end is equipped with the installation column, and the pincing arm is equipped with the installation groove, and both constitute the dismounting mechanism and realize separable connection. The utility model utilizes wedge force increasing principle to make the pincing mouth force self -lock, solves the problem that insulator clamping slips, through the modularization of handle dismounting, solves the problem that traditional long handle tool is inconvenient to carry, and remarkably improves operation safety and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of transmission line maintenance tools, and in particular to a transmission line insulator replacement pliers with anti-slip positioning claws. Background Technology

[0002] Transmission lines, as the lifeblood of power systems, are crucial for safe and stable operation. Insulators, as key components of transmission lines, are exposed to the outdoor environment for extended periods and are prone to aging, damage, or even zero voltage, requiring regular replacement and maintenance. During live-line or de-energized insulator replacement work, workers typically use specialized replacement pliers to grip the insulator's steel cap to remove pins, rotate, or disconnect the insulator string.

[0003] Currently, most existing insulator replacement clamps employ a simple flat-jaw or fixed arc-jaw structure. This structure primarily relies on the operator's hand grip strength amplified through leverage to generate friction and clamp the insulator. However, the insulator cap is typically a smooth cylindrical or frustum-shaped metal surface, and during outdoor operation, this surface often accumulates oil or dust, significantly reducing the coefficient of friction at the contact surface. In actual operation, especially when applying significant axial tensile force or rotational torque to the insulator, traditional fixed jaws are prone to slippage. This not only leads to replacement failure but, in severe cases, can even cause the insulator string to detach, threatening line safety and the personal safety of the operators.

[0004] In addition, to ensure sufficient insulation safety distance and operating torque, insulator replacement pliers are usually equipped with long insulated handles. This one-piece long handle structure makes the tool bulky, while the working space on transmission towers is often narrow and the climbing path is complex. It is extremely inconvenient for operators to carry such a long and thin tool up the tower, and it is also difficult to store it during work breaks or transportation, which brings additional burden to on-site maintenance work.

[0005] Therefore, this utility model proposes a transmission line insulator replacement clamp with anti-slip positioning claws to overcome the shortcomings of the prior art. Utility Model Content

[0006] In existing technologies, transmission line insulator replacement tools often suffer from slippage, insufficient clamping force, or even detachment when clamping smooth or dirty round insulator caps due to the reliance on simple flat or fixed arc-shaped friction surfaces. Furthermore, traditional long-handled tools are often one-piece structures, resulting in bulky designs that are inconvenient for workers to carry up towers and difficult to store in confined spaces. This invention aims to provide a modified transmission line insulator replacement pliers with a wedge-shaped self-locking anti-slip function, a detachable modular handle, and anti-slip positioning claws to effectively solve these problems.

[0007] This utility model provides a transmission line insulator replacement clamp with anti-slip positioning claws, comprising: two clamp arms that are hinged to each other by a hinge shaft, and a handle connected to the lower end of the clamp arms.

[0008] The clamp arm has a bolt mounting hole at its working end, through which a fastening bolt passes. The clamp arm is fixedly connected to a mounting base for an anti-slip positioning mechanism via the fastening bolt. The anti-slip positioning mechanism includes the mounting base, a wedge-shaped slide, a return spring, and a wedge-shaped gripper body. The wedge-shaped gripper body slides on the inclined surface of the wedge-shaped slide, and is elastically connected to the wedge-shaped slide via the return spring. The gripping surface of the wedge-shaped gripper body has a concave positioning arc surface, and the surface of the positioning arc surface is integrated with several anti-slip teeth.

[0009] Furthermore, a disassembly mechanism is provided between the handle and the clamp arm. The disassembly mechanism includes a mounting post at the end of the handle and a mounting groove on the clamp arm. The handle is detachably connected through the cooperation of the mounting post and the mounting groove, thereby realizing the modular assembly and disassembly of the tool.

[0010] Preferably, the side wall of the mounting post is provided with a limiting block, and a limiting groove is formed at the entrance of the mounting groove. The limiting block is constructed to enter the interior of the mounting groove through the limiting groove and to rotate within the mounting groove, so that the limiting block and the limiting groove are misaligned to lock the axial position of the handle and prevent the handle from directly dislodging under axial force.

[0011] Preferably, the disassembly mechanism further includes a locking assembly disposed on the surface of the clamp arm. The locking assembly includes a resilient latch, a locking block, and a slider. The resilient latch is connected to the slider, the locking block is used to limit the displacement of the resilient latch, and the resilient latch is used to limit the rotation of the handle, ensuring that the handle will not rotate accidentally when locked.

[0012] Preferably, the slider is slidably connected to the upper surface of the clamp arm located below the hinge shaft. The slider is used to drive the elastic buckle to slide on the surface of the clamp arm, so that the operator can control the release of the lock by pushing the slider with their fingers.

[0013] Preferably, the locking block is elastic and is used to release the restriction on the elastic buckle when force is applied, so that the elastic buckle can pass over the locking block under the drive of the slider and be locked by the locking block, thereby maintaining the unlocked state or the locked state.

[0014] Preferably, the wedge-shaped gripper body is designed to overcome the elastic force of the return spring and slide along the inclined surface of the wedge-shaped slide when subjected to force. During the sliding process, the wedge-shaped gripper body can drive the positioning arc surface and the anti-slip teeth to close inward, thereby achieving a self-locking effect that becomes tighter as it is pulled by the wedge force-increasing principle.

[0015] Preferably, the positioning arc surface is shaped to wrap around the insulator cap to increase the contact area, and the anti-slip teeth are distributed on the positioning arc surface and are used to pierce the dirt layer during clamping to increase the pressure on the surface of the insulator cap.

[0016] Preferably, the reset spring is built into the anti-slip positioning mechanism and drives the wedge-shaped gripper body to reset to the initial state when the clamp arm is released, so as to facilitate the next clamping operation.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing transmission line insulator replacement tools are prone to slippage and fall off when clamping round insulator steel caps due to insufficient friction by setting an anti-slip positioning mechanism with a wedge-shaped self-locking structure at the front end of the clamp arm. It achieves the technical effect of high stability and high reliability of self-locking clamping of insulator steel caps by using the wedge-shaped force-increasing principle to make the clamp jaws tighten more and more during the force process, and by using the positioning arc surface and anti-slip teeth.

[0018] 2. This utility model solves the problems of traditional long-handled replacement pliers being bulky, inconvenient for operators to carry on towers, and difficult to store in confined spaces by setting a rotary snap-on disassembly mechanism based on the cooperation of the mounting post and mounting groove between the handle and the pliers arm. It achieves the technical effect of quickly separating the handle and the pliers head, realizing modular disassembly and assembly of the tool, and significantly improving the portability of the tool and the efficiency of on-site operations.

[0019] 3. This utility model solves the problems of inaccurate positioning of the gripper in the initial contact stage and easy lateral slippage under complex force by setting an anti-slip tooth array perpendicular to the sliding direction on the wedge-shaped gripper body and cooperating with the pre-tightening effect of the return spring. It achieves the technical effect of accurately fitting the insulator steel cap in the initial stage of clamping and automatically resetting after the operation is completed, thus improving the accuracy of operation and the convenience of repeated use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a transmission line insulator replacement pliers with anti-slip positioning claws proposed in this utility model. Figure 2 This is a schematic diagram of the mounting post of a transmission line insulator replacement clamp with anti-slip positioning claws proposed in this utility model; Figure 3This is a schematic diagram of the main body of the wedge-shaped gripper of a transmission line insulator replacement clamp with anti-slip positioning claws proposed in this utility model. Figure 4 This is a schematic diagram of the mounting groove for a transmission line insulator replacement clamp with anti-slip positioning claws proposed in this utility model.

[0021] Legend: 1. Handle; 2. Hinge shaft; 3. Clamp arm; 4. Anti-slip positioning mechanism; 41. Wedge-shaped gripper body; 42. Return spring; 43. Wedge-shaped slide; 44. Positioning arc surface; 45. Anti-slip teeth; 46. Bolt mounting hole; 47. Mounting base; 48. Fastening bolt; 5. Disassembly mechanism; 51. Elastic buckle; 52. Locking block; 53. Slider; 54. Mounting post; 55. Limiting block; 56. Limiting groove; 57. Mounting groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example: Reference Figures 1 to 4 This utility model provides a transmission line insulator replacement clamp with anti-slip positioning claws, which aims to solve the structural defects of existing transmission line insulator replacement tools, such as easy slippage and detachment when clamping round insulators, and the large size of traditional long-handled tools that are inconvenient to carry and store on towers.

[0024] The transmission line insulator replacement clamp with anti-slip positioning claw mainly includes two intersecting clamp arms 3 and a hinge shaft 2 located in the middle of the two clamp arms 3 and rotatably connected together. The two clamp arms 3 form a lever structure around the hinge shaft 2 to amplify the clamping force at the end. The lower end of each clamp arm 3 extends with a handle 1 for the operator to hold. The other end of the clamp arm 3, i.e. the working end, has a bolt mounting hole 46. The fastening bolt 48 passes through the bolt mounting hole 46 to firmly fix the mounting base 47 of the anti-slip positioning mechanism 4 to the end of the clamp arm 3. The anti-slip positioning mechanism 4 is the core functional component of this device and is used to realize the self-locking and anti-slip clamping of the insulator steel cap.

[0025] The anti-slip positioning mechanism 4 specifically includes a mounting base 47, a wedge-shaped slide 43, a return spring 42, and a wedge-shaped gripper body 41. The wedge-shaped slide 43 is set inside the mechanism as a guide component. The wedge-shaped gripper body 41 slides on the inclined surface of the wedge-shaped slide 43. The return spring 42 is connected between the wedge-shaped gripper body 41 and the wedge-shaped slide 43 to drive the gripper to return to its original position when released. The wedge-shaped gripper body 41 integrates a key positioning arc surface 44 and anti-slip teeth 45 for direct contact and engagement with the insulator steel cap.

[0026] The handle 1 is detachably connected to the clamp arm 3 via a disassembly mechanism 5. The disassembly mechanism 5 includes a mounting post 54 integrally formed on the end of the handle 1 and a mounting groove 57 formed at the root of the rear end of the clamp arm 3. The handle 1 is fixed by inserting the mounting post 54 into the mounting groove 57, and the axial disengagement and radial rotation of the handle 1 are restricted by a specific locking component, so that the handle 1 can be replaced separately when damaged and is easy to store. The wedge-shaped gripper body 41 in the anti-slip positioning mechanism 4 has a special geometric structure. A wedge-shaped surface extending along its length is formed on the side facing away from the clamping center. This wedge-shaped surface matches a pre-set wedge-shaped slide 43 within the head cavity of the clamp arm 3. The wedge-shaped slide 43 serves as a guide reference, and its tilt angle is precisely calculated to ensure sufficient self-locking force is generated under load, while preventing jamming. A concave positioning arc surface 44 is provided on the side of the wedge-shaped gripper body 41 facing the clamping center. The radius of curvature of the positioning arc surface 44 matches the outer diameter of a standard insulator steel cap. Along the arc direction on the surface of the positioning arc surface 44… A plurality of anti-slip teeth 45 are evenly protruding, with the tips of the anti-slip teeth 45 facing the center of the insulator steel cap. They are used to pierce the dirt layer on the surface of the insulator and embed into its surface to increase friction. The return spring 42 is installed between the wedge-shaped gripper body 41 and the mounting base 47. Specifically, the return spring 42 is sleeved on the guide rod or bolt structure connecting the two. Its two ends abut against the front end face of the mounting base 47 and the rear end face of the wedge-shaped gripper body 41, respectively. The return spring 42 is always in a pre-compressed state and is used to provide a forward thrust to the wedge-shaped gripper body 41 so that it always remains in the initial extended position when not clamped by external force.

[0027] In the assembled state, the wedge-shaped surface on the back of the wedge-shaped jaw body 41 is tightly fitted and slidably engaged with the guide ramp of the wedge-shaped slide 43. This ramp engagement structure ensures that when the jaws clamp the insulator and the insulator attempts to slip outward, the wedge-shaped jaw body 41 will be subjected to a backward frictional force and overcome the elastic force of the return spring 42 to move backward. Under the action of the wedge-shaped slide 43, the wedge-shaped jaw body 41 will irreversibly retract inward while retracting, thereby drastically increasing the clamping force of the anti-slip teeth 45 on both sides on the insulator steel cap, achieving a self-locking anti-slip effect that tightens as it is pulled. In a preferred embodiment, the working end sidewall of the clamp arm 3 is provided with a bolt mounting hole 46 that connects to the internal receiving cavity. The fastening bolt 48 passes through the bolt mounting hole 46 and is screwed into the threaded hole of the mounting base 47. By tightening the fastening bolt 48, the entire anti-slip positioning mechanism 4 is locked inside the clamp arm 3. This connection method facilitates the replacement of the entire mechanism after the anti-slip teeth 45 wear. Several anti-slip teeth 45 are arranged in a circumferential array along the arc direction of the positioning arc surface 44, and the length extension direction of each anti-slip tooth 45 is perpendicular to the sliding direction of the wedge-shaped gripper body 41. This vertical arrangement design makes the most of the friction generated by sliding to drive the wedge self-locking action, preventing the anti-slip teeth 45 from sliding sideways along the tooth groove direction when under force. The disassembly mechanism 5 adopts a unique rotating buckle design. Specifically, the mounting column 54 is cylindrical and the side wall is provided with a limiting block 55. The entrance of the mounting groove 57 is provided with a notch for the axial passage of the limiting block 55 and an annular groove for the circumferential rotation of the limiting block 55. A limiting groove 56 is provided in the annular groove. When the limiting block 55 rotates to a specific angle and falls into the limiting groove 56, the axial position of the handle 1 is locked. An installation window is opened on the outer wall of the handle 1, and an elastic buckle 51 is installed inside it. The elastic buckle 51 is connected to a slider 53 and extends out to a locking block 52. When the handle 1 is installed in place, under the elastic force of the elastic buckle 51, the locking block 52 will automatically engage with the corresponding groove on the clamp arm 3 or abut against the side of the limit block 55, thereby restricting the rotation of the handle 1 relative to the clamp arm 3. The handle 1 can only be rotated and disassembled when the slider 53 is manually pushed to make the locking block 52 exit the locked position. The cross-section of the mounting post 54 can also be designed as a non-circular anti-rotation geometry, such as a square, hexagon, or a D-shaped structure with a flat keyway. In this case, the inner hole shape of the handle 1 is adapted to the cross-sectional shape of the mounting post 54. This shape fit can directly withstand a larger rotational torque and help to share the force of the limit block 55.

[0028] The implementation principle of this embodiment is as follows: The device mainly consists of two clamp arms 3 connected by a core hinge shaft 2, and a handle 1 is installed at the lower end of each clamp arm 3. At the working end of the clamp arm 3, the mounting base 47 of the anti-slip positioning mechanism 4 is firmly fixed to it through bolt mounting holes 46 and fastening bolts 48. The anti-slip positioning mechanism 4 is the core function. Its wedge-shaped gripper body 41 integrates the key positioning arc surface 44 and anti-slip teeth 45, and is connected to the wedge-shaped slide 43 through the built-in return spring 42 to jointly realize the inclined surface self-tightening function. In addition, in order to realize the modularization of the tool, the handle 1 is detachably connected to the clamp body through the disassembly mechanism 5.

[0029] When the operator begins to replace the insulator, the operator first holds the handle 1, aligns the open jaws with the steel cap of the healthy insulator adjacent to the insulator to be replaced, and sends the tool to the working position through the clamp arm 3, so that the positioning arc surface 44 of the anti-slip positioning mechanism 4 initially wraps around the steel cap of the insulator.

[0030] Secondly, during the clamping process, when the operator applies gripping force to the handle 1, this force is amplified through the hinge shaft 2 as a fulcrum, driving the two clamp arms 3 to close the entire anti-slip positioning mechanism 4. During the closing process, the positioning arc surface 44 on the wedge-shaped jaw body 41 ensures that the steel cap is accurately centered and wrapped. When the jaws contact the steel cap and begin to bear force, the force attempting to slip outward will act on the wedge-shaped jaw body 41 with anti-slip teeth 45, and cause the wedge-shaped jaw body 41 to overcome the force of the return spring 42 and slide along the inclined surface of the wedge-shaped slide table 43. During the sliding process, the wedge-shaped jaw bodies 41 on both sides that are in contact with the insulator steel cap will gradually move closer to each other, making the anti-slip teeth 45 on the wedge-shaped jaw body 41 clamp the steel cap tighter and tighter, that is, the pressure of the anti-slip teeth 45 on the surface of the steel cap increases, achieving a stable clamping and anti-slip positioning effect on the insulator steel cap.

[0031] Afterwards, the operator pulls the healthy insulator with the steel cap held by the handle 1 toward the insulator to be replaced, so that the transmission line is loosened. Then the operator removes the spring pin on the insulator to be replaced and replaces the insulator. After the replacement is completed, the operator uses the handle 1 to release the clamp arm 3 and end the clamping of the insulator steel cap. At this time, the wedge-shaped jaw body 41 will return to the initial state under the action of the return spring 42.

[0032] When handle 1 is damaged and needs to be replaced, the operator uses their fingers to push the locking block 52 forcefully, causing the elastic buckle 51 on the elastic locking block 52 to disengage under the pushing force. This causes the slider 53 to slide the elastic buckle 51 on the upper surface below the hinge of the clamp arm 3, thus releasing the restriction on the rotation of handle 1. Then, the operator rotates handle 1, causing the mounting post 54 connected to the end of handle 1 to rotate along with the limiting block 55. When the limiting block 55 rotates within the mounting groove 57 to the connection point with the limiting groove 56, the operator pulls handle 1 outward, thus completing the disassembly of handle 1. When the operator replaces handle 1 with a new one... During installation, the operator inserts the limiting block 55 into the limiting groove 56, allowing the limiting block 55 to pass through the limiting groove 56 and enter the mounting groove 57. At this time, the operator rotates the handle 1 180°, causing the limiting block 55 to be rotated below the limiting groove 56, making it difficult to pull out the mounting post 54 through the handle 1. Finally, the operator pushes the slider 53 forcefully, causing the elastic buckle 51 to pass over the locking block 52 and be locked by it, making it difficult to rotate the handle 1. This achieves the effect of quickly replacing the handle 1, so that when the handle 1 is damaged, only the handle 1 needs to be replaced instead of replacing the entire replacement pliers. At the same time, the detachable handle 1 makes it easy to store the replacement pliers as a whole.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transmission line insulator replacement clamp with anti-slip positioning claw, comprising two clamp arms (3) hinged to each other by a hinge shaft (2), and a handle (1) connected to the lower end of the clamp arms (3); Its features are, The working end of the clamp arm (3) is provided with a bolt mounting hole (46), and a fastening bolt (48) is inserted in the bolt mounting hole (46). The clamp arm (3) is fixedly connected to the mounting base (47) of the anti-slip positioning mechanism (4) through the fastening bolt (48). The anti-slip positioning mechanism (4) includes the mounting base (47), the wedge-shaped slide (43), the return spring (42), and the wedge-shaped gripper body (41). The wedge-shaped gripper body (41) is slidably fitted on the inclined surface of the wedge-shaped slide (43). The wedge-shaped gripper body (41) is elastically connected to the wedge-shaped slide (43) through the return spring (42). The clamping surface of the wedge-shaped gripper body (41) forms a concave positioning arc surface (44). The surface of the positioning arc surface (44) is integrated with a plurality of anti-slip teeth (45).

2. The transmission line insulator replacement pliers with anti-slip positioning claws according to claim 1, characterized in that, A disassembly mechanism (5) is provided between the handle (1) and the clamp arm (3). The disassembly mechanism (5) includes a mounting post (54) provided at the end of the handle (1) and a mounting groove (57) provided on the clamp arm (3). The handle (1) is detachably connected through the cooperation of the mounting post (54) and the mounting groove (57). The side wall of the mounting post (54) is provided with a limiting block (55), and a limiting groove (56) is opened at the entrance of the mounting groove (57). The limiting block (55) can enter the interior of the mounting groove (57) through the limiting groove (56) and can rotate in the mounting groove (57), so that the limiting block (55) and the limiting groove (56) are misaligned to lock the axial position of the handle (1).

3. A transmission line insulator replacement pliers with anti-slip positioning claws according to claim 2, characterized in that, The disassembly mechanism (5) further includes a locking component disposed on the surface of the clamp arm (3). The locking component includes an elastic buckle (51), a locking block (52), and a slider (53). The elastic buckle (51) is connected to the slider (53). The locking block (52) is used to limit the displacement of the elastic buckle (51). The elastic buckle (51) is used to limit the rotation of the handle (1).

4. A transmission line insulator replacement pliers with anti-slip positioning claws according to claim 3, characterized in that, The slider (53) is slidably connected to the upper surface of the clamp arm (3) located below the hinge shaft (2), and the slider (53) is used to drive the elastic buckle (51) to slide on the surface of the clamp arm (3).

5. A transmission line insulator replacement pliers with anti-slip positioning claws according to claim 3, characterized in that, The locking block (52) is elastic and is used to release the restriction on the elastic buckle (51) when force is applied, so that the elastic buckle (51) can pass over the locking block (52) and be locked by the locking block (52) under the drive of the slider (53).

6. A transmission line insulator replacement pliers with anti-slip positioning claws according to claim 1, characterized in that, The wedge-shaped gripper body (41) is constructed to overcome the elastic force of the return spring (42) and slide along the inclined surface of the wedge-shaped slide (43) when subjected to force, and the wedge-shaped gripper body (41) can drive the positioning arc surface (44) and the anti-slip teeth (45) to close inward during the sliding process.

7. A transmission line insulator replacement clamp with anti-slip positioning claws according to claim 1, characterized in that, The positioning arc surface (44) is configured to wrap around the insulator steel cap, and the anti-slip teeth (45) are distributed on the positioning arc surface (44) and are used to increase the pressure on the surface of the insulator steel cap when clamped.

8. A transmission line insulator replacement pliers with anti-slip positioning claws according to claim 1, characterized in that, The reset spring (42) is built into the anti-slip positioning mechanism (4) and drives the wedge-shaped gripper body (41) to reset to the initial state when the clamp arm (3) is released.

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