CN102615626A - Bolt disassembly tool - Google Patents

Abstract

The invention belongs to the assembly technology and relates to a bolt disassembly tool. The bolt disassembly tool is characterized by being composed of a clamping body and a locking nut [4]. The clamping body is composed of a handle [1], a screw [2] and an elastic three-claw head [3], the right end face of the handle [1] is coaxially integrated with the left end of the screw [2] in connection mode, the right end of the screw [2] is integrated with the root portion of each clamping claw of the three-claw head [3] in connection mode, and the locking nut [4] is screwed on the screw [2] of a clamping body. The bolt disassembly tool can firmly clamp a bolt to be disassembled, so that bolt disassembly work can be conveniently conducted, and unnecessary damage to the equipment caused by welding of a process rod is avoided.

Description

A bolt removal tool

technical field

The invention belongs to assembly technology, and relates to a bolt removal tool.

Background technique

The disassembly of bolts is often used in the field of mechanical assembly. Some bolts cannot be disassembled after the outer hexagonal head or inner hexagonal hole is worn out. It is necessary to weld a craft rod on the bolt to disassemble the bolt. Unnecessary damage to equipment may be caused when soldering. Welding cannot be carried out in some occasions with narrow spaces, and the disassembly of bolts becomes a difficult problem for equipment maintenance.

Contents of the invention

The object of the present invention is to provide a bolt dismounting tool for convenient bolt disassembly.

The technical solution of the present invention is: a bolt removal tool, characterized in that it is composed of a clamping body and a lock nut 4, the clamping body is composed of a handle 1, a screw rod 2 and an elastic three-jaw chuck 3, the handle 1 There is knurling on the outer cylindrical surface, the right end surface of the handle 1 is coaxially connected with the left end of the screw 2 as a whole, the right end of the screw 2 is connected with the root of each jaw of the three-jaw chuck 3 as a whole, and the three-jaw chuck 3 The three jaws are evenly distributed along the circumference, and the angle between the length direction of each jaw and the axis of the clamping body is α=15°～45°, and the outer surfaces 3a of the three jaws are located on the same conical surface. The surface is coaxial with the screw rod 2, and there are teeth 3b on the inner surface of the three jaws; the lock nut 4 is a cylinder with internal threads, and the lock nut 4 is screwed on the screw rod 2 of the clamping body. The right port of the tight nut 4 has an inner cone surface with a cone angle of 2α. When the three jaws clamp the bolt 5 to be disassembled, the cone surface fits with the outer surface 3a of the three jaws, locking The internal thread of tight nut 4 and the external thread of screw rod 2 are reverse thread.

The invention has the advantages that the bolts to be dismantled can be firmly clamped, so that the bolts can be disassembled conveniently, and unnecessary damage to the equipment caused by the welding process bar can be avoided.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed ways

The present invention will be described in further detail below. Referring to Fig. 1, a bolt removal tool is characterized in that it consists of a clamping body and a lock nut 4, the clamping body is composed of a handle 1, a screw rod 2 and an elastic three-jaw chuck 3, and the outer cylindrical surface of the handle 1 There are knurls on it, the right end surface of the handle 1 is coaxially connected with the left end of the screw 2 as a whole, the right end of the screw 2 is connected with the root of each jaw of the three-jaw chuck 3 as a whole, and the three clamps of the three-jaw chuck 3 The claws are evenly distributed along the circumference, and the angle between the length direction of each claw and the axis of the clamping body is α=15°～45°. The outer surfaces 3a of the three claws are located on the same conical surface, and the conical surface and the screw rod 2 are coaxial, and there are teeth 3b on the inner surface of the 3 jaws; the lock nut 4 is a cylinder with internal threads, and the lock nut 4 is screwed on the screw rod 2 of the clamping body, and the lock nut 4 There is an inner cone at the right port of the cone, and the cone angle of the cone is 2a. When the three jaws clamp the bolt 5 to be disassembled, the cone fits with the outer surface 3a of the three jaws, and the lock nut 4 The internal thread of 2 and the external thread of the screw rod 2 are reverse thread.

In order to increase the rotational moment, there is a font or a cross-shaped booster rod on the handle 1 .

The working principle of the present invention is as follows: first, the three jaws of the three-jaw chuck 3 uniformly distributed along the circumference are stuck on the bolt 5 to be dismantled, and then the lock nut 4 is rotated counterclockwise to make it move towards the bolt 5 to be dismantled. direction movement, the inner conical surface of the right port of the lock nut 4 squeezes the outer conical surfaces of the three jaws, so that the jaws are tightened to clamp the bolt 5 to be dismantled. Then turn the handle 1 counterclockwise to remove the bolt 5 to be removed. Since the threads of the screw rod 2 and the lock nut 4 are reverse threads, and there are teeth on the inner surfaces of the three jaws, the bolt 5 to be disassembled will not loosen during disassembly.

In one embodiment of the present invention, the angle α between the length direction of each jaw of the three-jaw chuck 3 and the axis of the clamping body is 30°. The taper angle of the inner taper surface of the right port of the lock nut is processed to 60°.

Claims (2)

1. A bolt removal tool, characterized in that it consists of a clamping body and a lock nut [4], the clamping body consists of a handle [1], a screw [2] and an elastic three-jaw chuck [3], There is knurling on the outer cylindrical surface of the handle [1], the right end surface of the handle [1] is coaxially connected with the left end of the screw [2] as a whole, and the right end of the screw [2] is connected with each clamp of the three-jaw chuck [3]. The roots of the jaws are connected as a whole, and the three jaws of the three-jaw chuck [3] are evenly distributed along the circumference, and the angle between the length direction of each jaw and the axis of the clamping body is α = 15° ~ 45°, 3 The outer surfaces [3a] of the jaws are located on the same conical surface, which is coaxial with the screw [2], and there are teeth [3b] on the inner surfaces of the three jaws; the lock nut [4] is a belt There is a cylinder with internal thread, the lock nut [4] is screwed on the screw [2] of the clamping body, there is an inner cone surface at the right port of the lock nut [4], the cone angle of the cone surface is 2α, When the three jaws clamp the bolt [5] to be removed, the tapered surface fits the outer surface [3a] of the three jaws, and the inner thread of the lock nut [4] and the outer thread of the screw [2] are Reversed thread. 2. The bolt removal tool according to claim 1, characterized in that: there is a font or cross-shaped booster rod on the handle [1].

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