CN218093810U

CN218093810U - Combined screw

Info

Publication number: CN218093810U
Application number: CN202221308442.9U
Authority: CN
Inventors: 刘地印
Original assignee: Guizhou Hengtai Precision Machinery Co ltd
Current assignee: Guizhou Hengtai Precision Machinery Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-12-20
Anticipated expiration: 2032-05-27

Abstract

The application discloses a combined screw in the technical field of fasteners, which comprises a screw head and a screw rod, wherein a pin hole is reserved at the central shaft of the screw rod, and two opposite inner walls in the pin hole are respectively provided with a limiting hole; the lower surface of the screw head is fixedly connected with a pin pipe, the pin pipe is movably connected in the pin hole, the pipe wall of the pin pipe is provided with a through hole, the through hole is internally and slidably connected with limiting blocks, the two limiting blocks are rotatably connected with supporting rods, the supporting rods are mutually and vertically and rotatably connected, the rotating connection part of the supporting rods is provided with a torsional spring, and one end of each limiting block, which is far away from the supporting rods, is inserted into the limiting hole; swing joint has the pin pole in the cotter pipe, the vertical push rod of bottom fixedly connected with of pin pole, the bottom of push rod and the rotation junction contact of two spinal branch poles, and the top of pin pole extends to the tank bottom of cross recess, and the cotter overcoat has the spring, the top of spring and the inner wall fixed connection of cotter pipe, the top and the cotter pole fixed connection of spring. The problem that the screw can not be taken out after the screw head is damaged is solved in this scheme.

Description

Combined screw

Technical Field

The utility model relates to a fastener technical field, concretely relates to combined screw.

Background

Screws are a common fastener and are widely used in machinery, electrical appliances and buildings. Generally, the material is metal or plastic, and the cylindrical groove with the concave and convex carved on the surface is called as a screw. Screws are tools that utilize the oblique circular rotation of an object and frictional forces to tighten an object work in a progressive manner.

The screw mainly comprises a screw head and a screw rod, wherein a cross groove matched with a screwdriver in use is formed in the screw head, the screw rod is fixed on the screw head, and the screw head of the conventional screw is twisted by the screwdriver for multiple times, so that the cross groove in the screw head is possibly damaged, and further, the screw is prevented from being installed or taken out due to the slipping phenomenon when the screwdriver is used, so that the screw still can be continuously installed or taken out after the cross groove in the screw head is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combined screw to solve present screwhead and probably lead to the problem that the screw can't continue to install or take out after damaging.

In order to solve the technical problem, the utility model provides a following technical scheme: a combined screw comprises a screw head and a screw rod, wherein a pin hole is reserved at the central shaft of the screw rod, two opposite inner walls in the pin hole are respectively provided with a limiting hole, and the top of the pin hole extends to the upper surface of the screw rod;

the upper surface of the screw head is provided with a cross-shaped groove, the lower surface of the screw head is fixedly connected with a pin pipe, the pin pipe is movably connected in the pin hole, the pipe walls of two opposite sides of the pin pipe are respectively provided with a through hole, the through holes are communicated with the limiting holes and correspond to the limiting holes one by one, each through hole is internally and slidably connected with a limiting block, one side of each limiting block, which faces to the central shaft of the pin pipe, is rotatably connected with a support rod, the two support rods are mutually and vertically and rotatably connected, the rotating connection part of the two support rods is provided with a torsion spring, and one end, away from the support rods, of each limiting block is inserted into the limiting hole;

swing joint has the pin pole in the cotter pipe, the vertical push rod of bottom fixedly connected with of pin pole, the bottom of push rod and the rotation junction contact of two spinal branch poles, and the top of pin pole extends to the tank bottom of cross recess, the cotter overcoat has the spring, the top of spring and the inner wall fixed connection of cotter pipe, the top and the cotter pole fixed connection of spring.

The utility model discloses the theory of operation: when the screw is in an initial state, the two support rods are in a horizontal state, and at the moment, the two limiting blocks are inserted into the two limiting holes to fix the screw head on the screw rod through the pin tube. When the cross-shaped groove on the screw head is damaged and cannot be screwed by a screwdriver, a tool is inserted into the cross-shaped groove and pushes the pin rod downwards, the push rod is pushed to move downwards when the pin rod moves downwards, the bottom end of the push rod is in contact with the rotating connection part of the two supporting rods, the supporting rods are in rotating connection with the limiting block, and the limiting block is in sliding connection with the through hole.

The utility model has the advantages that: through combined screw in this scheme, the impaired back of cross recess on the screwhead, directly use the instrument to promote the round pin pole in the cotter pipe and can let screwhead and screw pole separate, oneself upwards spur the screwhead this moment and can will realize the separation of screwhead and screw pole, the work of taking out of completion screw that can be normal after changing the screwhead this moment.

Furthermore, the bottom of push rod is equipped with the draw-in groove, and the width of draw-in groove is greater than the width of branch. The push rod can be prevented from slipping in the moving process after being contacted with the rotating connection part of the support rod through the arrangement.

Further, the pin pipe is connected with the pin hole spline. The purpose is that the pin tube can vertically move up and down in the pin hole and cannot rotate through the arrangement, so that when the screw head is rotated by the screwdriver, the screw rod can also rotate along with the rotation of the screw head.

Furthermore, one side of the limiting block facing the limiting hole is hemispherical, and the diameter of the limiting hole is the same as that of the limiting block. The purpose is to enable the limiting block to be easily inserted into the limiting hole through the arrangement.

Furthermore, the inner wall of the pin pipe is provided with threads, the pin rod is in threaded connection with the pin pipe, and the top of the pin rod is also provided with a cross groove. When the limiting block is used, a screwdriver is inserted into the cross-shaped groove, then the screwdriver rotates the screw, the pin rod is driven to rotate through the screwdriver, the pin rod gradually moves downwards in the pin pipe when rotating, the push rod is driven to move downwards when the pin rod moves downwards, the supporting rod is further pushed through the push rod, and then the limiting block is driven to move out of the limiting hole.

Drawings

FIG. 1 is a schematic view of a combination screw according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a combination screw according to embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a cross-shaped groove 1, a screw head 2, a pin tube 3, a spring 4, a pin rod 5, a push rod 6, a support rod 7, a limiting block 8 and a screw rod 9.

The embodiment is basically as shown in the attached figure 1:

a combined screw comprises a screw head 2 and a screw rod 9, wherein a pin hole is reserved at the central shaft of the screw rod 9, two opposite inner walls in the pin hole are respectively provided with a hemispherical limiting hole, and the top of the pin hole extends to the upper surface of the screw rod 9;

the upper surface of the screw head 2 is provided with a cross-shaped groove 1, the lower surface of the screw head 2 is fixedly connected with a pin pipe 3, the pin pipe 3 is movably connected in a pin hole, pipe walls on two opposite sides of the pin pipe 3 are respectively provided with a through hole, the through holes are communicated with limiting holes and correspond to the limiting holes one by one, a limiting block 8 is connected in each through hole in a sliding manner, one side of each limiting block 8, which faces towards the central shaft of the pin pipe 3, is rotatably connected with a supporting rod 7, one ends of the two supporting rods 7, which are far away from the limiting blocks 8, are vertically and rotatably connected with each other, the rotating connection part of the two supporting rods 7 is provided with a torsion spring, one end of each limiting block 8, which is far away from the supporting rod 7, is hemispherical, and the end of the limiting block 8 is inserted into the limiting hole;

spline connection has pin 5 in the round pin pipe 3, the vertical push rod 6 of bottom fixedly connected with of pin 5, the bottom of push rod 6 and the contact of the rotation junction of two spinal branch poles 7, the bottom of push rod 6 is equipped with the draw-in groove, the width of draw-in groove is greater than the width of branch 7, the top of pin 5 extends to the tank bottom of

cross recess

1, 5 overcoat joints of pin have spring 4, the top of spring 4 and the inner wall fixed connection of round pin pipe 3, the top and the 5 fixed connection of pin of spring 4.

The specific implementation process is as follows:

in the initial state, the two support rods 7 are in a horizontal state, and at the moment, the two limiting blocks 8 are inserted into the two limiting holes to fix the screw head 2 on the screw rod 9 through the pin tube 3. When the cross-shaped groove 1 on the screw head 2 is damaged and cannot be screwed by a screwdriver, a tool is inserted into the cross-shaped groove 1 and pushes the pin rod 5 downwards, the push rod 6 is pushed to move downwards when the pin rod 5 moves downwards, the support rod 7 is rotationally connected with the limiting block 8 due to the fact that the bottom end of the push rod 6 is in contact with the rotational connection part of the two support rods 7, and the limiting block 8 is slidably connected with the through hole, so that the rotational connection part of the support rod 7 is pushed to move downwards when the push rod 6 moves downwards, the limiting block 8 is pulled to slide in the through hole when the support rod 7 moves downwards, the limiting block 8 is separated from the limiting hole when the rotational connection part of the two support rods 7 moves downwards, the screw head 2 can be pulled out of the screw rod 9 by pulling the upwards, and then the pin tube 3 of a new screw head 2 is inserted into the pin tube 3.

In the case of the example 2, the following examples are given,

example 2 differs from example 1 in that as shown in figure 2: the inner wall of the pin pipe 3 is provided with threads, the pin rod 5 is in threaded connection with the pin pipe 3, and the top of the pin rod 5 is also provided with a cross-shaped groove 1.

When the limiting device is used, a screwdriver is inserted into the cross-shaped groove 1, then the screwdriver is rotated, the pin rod 5 is driven to rotate through the screwdriver, the pin rod 5 gradually moves downwards in the pin pipe 3 when rotating, the push rod 6 is driven to move downwards when the pin rod 5 moves downwards, the support rod 7 is further driven through the push rod 6, and the limiting block 8 is further driven to move out of the limiting hole.

Claims

1. A combination screw, comprising: the screw comprises a screw head and a screw rod, wherein a pin hole is reserved at the central shaft of the screw rod, two opposite inner walls in the pin hole are respectively provided with a limiting hole, and the top of the pin hole extends to the upper surface of the screw rod;

2. The combination screw of claim 1, wherein: the bottom of push rod is equipped with the draw-in groove, and the width of draw-in groove is greater than the width of branch.

3. The combination screw of claim 2, wherein: the pin pipe is connected with the pin hole spline.

4. The combination screw of claim 3, wherein: one side of the limiting block, which faces the limiting hole, is hemispherical, the limiting hole is hemispherical, and the diameter of the limiting hole is the same as that of the limiting block.

5. The combination screw of claim 4, wherein: the inner wall of the pin pipe is provided with threads, the pin rod is in threaded connection with the pin pipe, and the top of the pin rod is also provided with a cross-shaped groove.