CN201230164Y - Live operation tong - Google Patents

Abstract

The utility model relates to a live working pliers for power transmission line maintenance, which includes inner and outer insulating rods equipped with return springs, a pliers body arranged at the front end of the insulating rods and a handle connected to the rear end of the insulating rods, and a handle at the rear of the inner insulating rods. A section of the threaded rod which is set to be relatively rotatable, and matched with the threaded rod is provided with a guide sleeve, a locking pin which is placed in the upper end of the guide sleeve with a pull ring and a lower end which is set as a straight edge, and a locking pin which is placed on the locking pin. Self-locking fixing device composed of spring and spring stop ring. The technical solution of the utility model also includes: a pull ring inserting groove matched with the pull ring is arranged on the upper end of the guide sleeve. The utility model solves the problem that the operator needs to always apply the clamping force after clamping the object, which can effectively reduce the labor intensity of the operation and improve the work efficiency; and the jaws can be fine-tuned by rotating the threaded rod, which is convenient for operation; The configuration of the pull ring slot can realize the use or non-use of the self-locking function, which increases the flexibility of the use of the working tongs.

Description

live working pliers

technical field

The utility model relates to a live working tongs used for the inspection and maintenance of power transmission lines.

Background technique

Live working pliers are a common tool for power transmission line maintenance. Present live working pliers are composed of inner and outer insulating rods with a front end assembly pliers body and a rear end with handles respectively. In the non-use state, the inner insulating rod is stretched forward by the return spring assembled in the outer insulating rod to keep the jaws of the pliers in an open state; when the pliers are in use, pull the handle of the inner insulating rod relatively backward to make the jaws Closed for forceps operation. The existing problem is: when using the working pliers to operate the pliers, it is necessary to always overcome the force of the return spring to keep the inner insulating rod in a retracted state. Holding the inner and outer insulating rod handles will cause hand numbness and increase labor intensity. And it is easy to cause the object to be clamped to come off, which affects the operation effect and prolongs the operation time.

Contents of the invention

The purpose of this utility model is to solve the above problems and provide a live working tongs with self-locking function to facilitate the use of live working tongs, reduce labor intensity, improve working effect and save working time.

The technical solution to achieve the above purpose is: a live working pliers, which includes inner and outer insulating rods, a pair of opening and closing connecting rods are hinged at the front end of the inner insulating rods, and a pliers body is installed at the front end of the outer insulating rods. The pliers handle of the body is hingedly connected with the opening and closing connecting rod, and the rear ends of the inner and outer insulating rods are respectively fixedly connected with inner and outer insulating rod handles, and a return spring is arranged in the outer insulating rod to cooperate with the inner insulating rod. A section of the connecting handle at the rear of the insulating rod is set as a threaded rod, and the front end of the threaded rod is relatively rotatable connected with the inner insulating rod, and a self-locking fixing device is arranged in cooperation with the threaded rod; the self-locking fixing device has a vertical fixed connection The guide sleeve at the rear end of the outer insulation rod is provided with a locking pin whose upper end is connected to the draw ring and the lower end is arranged as a straight edge in the guide sleeve, and a locking spring and a spring retaining ring are arranged on the locking pin.

The technical solution of the present invention also includes: a ring slot cooperating with the pull ring is arranged on the upper end of the guide sleeve.

The utility model can automatically lock the pliers after clamping objects through the configured self-locking fixing device, thereby solving the problem that the operator needs to always apply clamping force after clamping objects, which can effectively reduce the labor intensity of operation and improve work efficiency. In addition, by turning the threaded rod, the degree of opening and closing of the jaws of the pliers can be fine-tuned, which is convenient for operation.

The utility model is provided with a draw ring slot on the upper end of the guide sleeve, and by adjusting the draw ring to be placed in the slot or on the slot, so as to realize the use or non-use of the self-locking function of the working tongs, and improve the Flexible use of live working clamps.

Description of drawings

Fig. 1 is the front view of the live working tongs structure;

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Detailed ways

The specific embodiment of the utility model will be described in conjunction with the accompanying drawings.

As shown in Figure 1, the live working pliers include inner and outer insulating rods 1 and 2, a pair of opening and closing connecting rods 3 are hinged at the front end of the inner insulating rod, and a pliers body 4 is assembled at the front end of the outer insulating rod. The pliers handle is hingedly connected with the opening and closing connecting rod, and the rear ends of the inner and outer insulating rods are respectively fixedly connected with inner and outer insulating rod handles 5 and 6, and a return spring 7 is arranged in the outer insulating rod to cooperate with the inner insulating rod A section of the connecting handle at the rear part of the inner insulating rod is set as a threaded rod 8, and the front end of the threaded rod is arranged as a convex structure, which cooperates with the ferrule at the connecting end of the inner insulating rod to form a relatively rotatable connection. Cooperate with the threaded rod to be provided with a self-locking fixing device 9, as shown in Figure 2, the self-locking fixing device has a guide sleeve 10 vertically fixedly connected to the rear end of the outer insulating rod, and the upper end is connected to the lower end of the pull ring 11 in the guide sleeve. The locking pin 12 that is arranged as the inline cutting edge is sleeved on the locking pin and has a locking spring 13 and a spring retaining ring 14.

When the utility model is actually implemented, the upper end of the guide sleeve 10 is provided with a draw ring slot 15 that cooperates with the draw ring 11 .

Claims (2)

1, a kind of live line working pincers, in including, external insulation bar (1) and (2), front end hinge at interior insulating bar is connected to a pair of folding connecting rod (3), the front end of insulating bar is equipped with caliper (4) outside, the pincers handle and the folding connecting rod of its caliper are hinged, interior, in the rear end of external insulation bar is fixedly connected with respectively, external insulation bar handle (5) and (6), interior the matching with interior insulating bar of insulating bar is provided with return spring (7) outside, it is characterized in that: be arranged to threaded rod (8) for one section of interior insulating bar (1) rear portion connection handle (5), the front end of its threaded rod can relatively rotate with interior insulating bar one-tenth and be connected, and matching with threaded rod is provided with self-locking fixture (9); Its self-locking fixture has the perpendicular fairlead (10) that is fixedly connected on external insulation bar (2) rear end of putting, be provided with the upper end and connect the stop pin (12) that the in-line cutting edge is arranged in draw ring (11) lower end in fairlead, being placed on has locking spring (13) and spring shelves ring (14) on the stop pin.

2, live line working pincers according to claim 1 is characterized in that: be provided with the draw ring caulking groove (15) that cooperates with draw ring (11) in the upper end of fairlead (10).

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