CN210623358U

CN210623358U - Inner hexagonal anti-screw-withdrawal fastening screw

Info

Publication number: CN210623358U
Application number: CN201920614547.9U
Authority: CN
Inventors: 宋标; 高艳飞; 张强; 刘怀彬
Original assignee: Xining Branch Of Spic Xi'an Solar Power Co ltd; Qinghai Huanghe Hydropower Development Co Ltd; Huanghe Hydropower Development Co Ltd; State Power Investment Corp Xian Solar Power Co Ltd
Current assignee: Huanghe hydropower Xining Solar Power Co.,Ltd.; Qinghai Huanghe Hydropower Development Co Ltd; Huanghe Hydropower Development Co Ltd; State Power Investment Corp Xian Solar Power Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-05-26
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses an inner hexagonal anti-back-threading set screw, which comprises an inner hexagonal nut, a metal screw and a polystyrene plastic rod, wherein the inner hexagonal nut is arranged at the top of the metal screw, a groove body for accommodating the polystyrene plastic rod is arranged on the metal screw, and the polystyrene plastic rod is arranged in the groove body and protrudes out of the surface of the metal screw; compared with the prior art, set up the cell body on metal screw, with the polystyrene plastic stick stopper enter the cell body in and be outstanding metal screw's state, make the outstanding position of polystyrene plastic stick and screw hole have an extrusion bulging force, thereby make the difficult silk that moves back of screw, be used for the tight of mechanical transmission axle external member decide, to the tight of the bigger external member of forward and reverse drive frequency decide, reduce the automatic abnormal conditions that moves back the silk and become flexible in the in-service use effectively, reduced the point and examined the frequency, improve mechanical equipment and operated the rate, realize the utility model aims at the same time.

Description

Inner hexagonal anti-screw-withdrawal fastening screw

Technical Field

The utility model relates to a tightly decide the screw, in particular to be applied to the frequent transmission shaft external member of positive and negative rotation and tightly decide the interior hexagonal of use and prevent moving back a tight set screw.

Background

In the prior art, a fastening screw mainly comprises a nut, a screw rod and a thread, and is a tool for fastening a machine part of an object step by utilizing the physics and mathematical principles of the inclined circular rotation and the friction of the object.

In the mechanical and automatic equipment industry, transmission shafts rotating in forward and reverse directions are widely used, the existing fastening screws are mainly made of metal materials such as iron or steel when some metal transmission shafts are fastened, but the phenomenon of wire withdrawing is easy to occur when the transmission shafts frequently rotate in forward and reverse directions, so that equipment is stopped due to failure, the operating rate of the equipment is influenced, and certain economic loss is caused.

Therefore, there is a need for a socket head screw with anti-back screw to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hexagonal screw is prevented moving back and is tightly decided screw, to prior art's not enough, has solved the frequent positive reverse rotation of transmission shaft effectively and has appeared move back a phenomenon.

The utility model provides a technical problem can adopt following technical scheme to realize:

the utility model provides an inner hexagonal prevents moving back a tight set screw, its characterized in that, it includes hexagon nut, metal screw and polystyrene plastic rod, hexagon nut sets up metal screw's top, be provided with the cell body that holds the polystyrene plastic rod on the metal screw, the polystyrene plastic rod sets up in the cell body and outstanding metal screw's surface.

In one embodiment of the present invention, the width of the groove body is 0.1-0.4mm smaller than the diameter of the polystyrene plastic rod.

In one embodiment of the present invention, the depth of the groove body is 0.1-0.8mm smaller than the diameter of the polystyrene plastic rod.

In an embodiment of the present invention, the distance between the groove body and the top of the hexagonal socket screw is 2-5 mm.

The utility model discloses a tight screw of deciding of hexagonal anti-receding screw, compared with the prior art, set up the cell body on metal screw, with the state that polystyrene plastic stick fills in the cell body and is outstanding metal screw, make the outstanding position of polystyrene plastic stick and screw hole have an extrusion expansive force, thereby make the difficult back of screw, be used for tight of mechanical transmission shaft external member decide, to the tight of the bigger external member of forward and reverse transmission frequency decide, reduce the automatic back of screw and not hard up abnormal conditions in the in-service use effectively, reduced the frequency of point inspection, improve mechanical equipment and operated the rate, realize the utility model aims at.

The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.

Drawings

FIG. 1 is a schematic structural view of the inner hexagonal anti-back screw of the present invention;

FIG. 2 is a schematic structural view of the inner hexagonal anti-back screw and nut of the present invention;

fig. 3 is a schematic structural diagram of the polystyrene rod of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Examples

As shown in fig. 1 to 3, the utility model discloses a tight set screw of setback is prevented to allen key, it includes hexagon socket cap nut 10, metal screw 20 and polystyrene plastic rod 30, and hexagon socket cap nut 10 sets up at metal screw 20's top, is provided with the cell body 21 that holds polystyrene plastic rod 30 on the metal screw 20, and polystyrene plastic rod 30 sets up in the cell body 21 and outstanding metal screw 20's surface.

Inner hexagonal nut 10 is used for the utility model discloses an inner hexagonal prevents moving back tight of tight set screw of silk, and the outside is circular inside and is regular hexagon, is located the utility model discloses an inner hexagonal prevents moving back the top of tight set screw of silk, bears inner hexagonal spanner during the fastening.

The metal screw rod 20 is provided with threads and a groove body 21 for bearing the polystyrene plastic rod 30; in this embodiment, the width of the slot body 21 is 0.1-0.4mm smaller than the diameter of the polystyrene plastic rod 30, the depth of the slot body 21 is 0.1-0.8mm smaller than the diameter of the polystyrene plastic rod 30, and the inner hexagonal anti-back screw is protruded when the polystyrene plastic rod 30 is inserted into the slot body 21.

In this embodiment, the distance between the slot 21 and the top of the hexagon socket screw is 2-5 mm.

The polystyrene plastic rod 30 is placed in the groove body 21 in a protruding state, is applied to tightening of a transmission shaft type kit, has extrusion expansion force in a screw hole after being installed, has a resistance in a protruding state due to the influence of the expansion force when being withdrawn, and plays a role in preventing the withdrawal of the screw by utilizing the friction effect of the polystyrene plastic rod 30.

The utility model discloses a hexagon socket prevents moving back tight set screw of silk, set up cell body 21 on traditional tight set screw's basis, in filling in the cell body 21 of seting up with polystyrene plastic stick 30, and polystyrene plastic stick 30 length is unanimous with the cell body 21 length of seting up, after twisting the screw hole, be equipped with polystyrene plastic stick 30 owing to be outstanding state, make polystyrene plastic stick 30 outstanding position and screw hole have an extrusion bulging force, thereby make the screw be difficult for moving back the silk, a tight set for mechanical transmission shaft external member, to the tight set of the bigger external member of positive and negative transmission frequency, can effectively reduce the automatic abnormal conditions that moves back the silk and become flexible in the in-service use, the frequency of point inspection has been reduced, improve mechanical equipment operating rate.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides an inner hexagonal prevents moving back a tight set screw, its characterized in that, it includes hexagon nut, metal screw and polystyrene plastic rod, hexagon nut sets up metal screw's top, be provided with the cell body that holds the polystyrene plastic rod on the metal screw, the polystyrene plastic rod sets up in the cell body and outstanding metal screw's surface.

2. The hexagonal socket back-proof set screw of claim 1, wherein the width of the slot is 0.1-0.4mm smaller than the diameter of the polystyrene plastic rod.

3. The hexagonal socket back-proof set screw of claim 1, wherein the depth of the groove is 0.1-0.8mm smaller than the diameter of the polystyrene plastic rod.

4. The hexagonal socket screw of claim 1, wherein the distance between the groove and the top of the hexagonal socket screw is 2-5 mm.