CN201009217Y - Broken screw taking-out device - Google Patents

Abstract

The utility model discloses a disconnected screw takes out device, including moving back the screw main part, move back and be provided with the screw thread in the screw main part, the screw opposite direction of its screw thread direction and screw moves back the screw main part and keeps away from the screw thread and serve an organic whole injection moulding have the interface end of being connected with pneumatic tool port, move back the screw thread in the screw main part, its thread depth degree by dark to shallow toward the interface end direction degressive. The utility model discloses disconnected screw takes out device has simple structure, high-efficient practical advantage, can use with the cooperation of conventional pneumatic tool and spanner, swiftly takes out disconnected bolt or screw rapidly, does not influence the screw thread in nut (the hole) simultaneously, when solving among the current actual operation earlier with the electric drill hole, must beat the technological problem at the center.

Description

A device for taking out a broken screw

technical field

The utility model relates to a maintenance tool, in particular to a device for taking out broken bolts or screws.

Background technique

At present, in the field of machine or automobile maintenance, due to quality problems of bolts or screws or excessive installation force, bolts or screws often break directly. Take it out, the most troublesome thing is that the bolt or screw is broken in the nut (hole). The methods for taking out the bolt or screw in the nut (hole) in the existing scheme are as follows: 1. directly chisel out the broken screw. If the thread in the screw hole is damaged, the screw hole must be re-opened; 2. Use a sharp blade to carve a groove on the section, and then use a flat-head screwdriver to twist the broken screw out. This method has a small force, difficult torsion, and low efficiency. ;3. First, open a few holes on the surface of the broken screw, and then follow the direction of twisting the screw, and twist it out with a sharp cone and a hammer. The above three methods require a lot of energy for the operator, and at the same time work efficiency very low.

At present, there is also a method of using a torx screwdriver to take out a broken bolt or screw. When using this method, a hole must be made on the end face of the broken bolt or screw, and the requirements for the hole are very high. Only then can the maximum efficiency of the rotation force be exerted so as to unscrew the broken bolt or screw. This method requires very precise drilling, which brings great difficulties in actual operation.

Utility model content

The problem to be solved by the utility model is to provide a device for taking out broken bolts or screws that has a simple structure, can be used in conjunction with conventional pneumatic tools, and can quickly and quickly take out broken bolts or screws without affecting the threads in the nuts (holes). When drilling a hole with an electric drill in actual operation, it is necessary to hit the technical problem in the center.

According to the above-mentioned problems to be solved, a broken screw removal device is designed, including a screw removal body. The screw removal body is provided with threads, and its thread direction is opposite to that of the screw thread. The end of the screw removal body away from the thread is integrated. Injection molding has an interface end connected with the port of the pneumatic tool, and the screw thread on the main body of the screw back has a thread depth that decreases from deep to shallow toward the interface end. When using the broken screw of the utility model to take out the device, first use an electric drill to drill a hole on the section of the broken screw, as long as the hole is not too close to the side, and then install the broken screw of the utility model on the port of the conventional pneumatic tool. , extend the threaded end of the main body of the screw back into the hole, as the main body of the screw back goes deeper, the thread at the end part also plays the role of threading in the hole, because the thread depth on the main body is from deep to shallow , the frictional resistance between the shallower thread and the thread in the hole increases, and the broken screw is slowly twisted out.

In order to make it easier for the main body of the screw to be pushed into the hole, the diameter of the threaded end on the main body of the screw is made smaller than the diameter of the main body of the screw. The cross-section of the interface end connected with the conventional pneumatic tool port is a regular hexagon.

The device for taking out broken screws of the utility model is suitable for taking out failed screws and bolts broken in holes, and can be made into different specifications according to the sizes of different screws or bolts. In actual operation, the requirements for drilling holes are not high. By increasing the friction resistance between the thread on the main body of the screw and the thread that is opened out of the hole, it is easy to take out the broken screw or bolt without slipping and being ejected. An efficient, simple and practical wire withdrawal device.

Description of drawings

Accompanying drawing 1 is the plan view of taking out device of broken screw of the present utility model;

Accompanying drawing 2 is A--A sectional view among Fig. 1.

Detailed ways

The specific embodiment of the present utility model is described in detail below with reference to accompanying drawing:

As shown in Fig. 1 and Fig. 2, the device for taking out the broken screw of the present utility model includes a screw back main body 1, and the screw back main body is provided with a thread 3, and the direction of the thread 3 is opposite to that of the screw thread, and the screw back main body 1 The end far away from the thread is integrally injection-molded with an interface end 2 connected to the port of the pneumatic tool. The thread 3 on the main body 1 of the screw thread 3 has a depth that decreases from deep to shallow toward the interface end. The cross section of the connected interface end 2 is a regular hexagon.

The preferred embodiment of the utility model is: the diameter of the end of the threaded 2 ends on the screw main body 1 is made 1-3 millimeters smaller than the diameter of the screw main body. When in use, first use an electric drill to drill a hole near the center of the end face of the broken screw, then extend the threaded end of the threaded body 1 into the hole, connect the interface end 2 to the port of the pneumatic tool, and start the pneumatic tool to make The threads 2 on the main body 1 of the thread unwinding are threaded on the inner wall of the hole while twisting out the broken screw. Since the threads 2 on the main body 1 of the thread unwinding decrease from deep to shallow, the upper thread 2 is in the shape of "匚". , It has a large contact area with the thread on the hole, and its resistance is large, so it is easier to twist out the broken screw. In addition, a broken screw or bolt can also be removed by twisting the interface end 2 with a conventional wrench.

Claims (3)

1. a disconnected screw takes out device, comprise and move back the screw main body, the described screw main body of moving back is provided with screw thread, its hand of spiral is opposite with the hand of spiral of screw, move back the screw main body and the interface end that is connected with the pneumatic tool port is arranged away from integrated injection molding on the end of screw thread, it is characterized in that: the described screw thread that moves back on the screw main body, its depth of thread is successively decreased by being deep to shallow past interface end direction.

2. disconnected screw according to claim 1 takes out device, and it is characterized in that: the termination diameter that moves back threaded end on the screw main body is less than the diameter that moves back the screw main body.

3. disconnected screw according to claim 1 takes out device, and it is characterized in that: the cross section of described interface end is a regular hexagon.

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