CN218031029U

CN218031029U - Inner hexagonal anti-screw-withdrawal fastening screw

Info

Publication number: CN218031029U
Application number: CN202222026933.0U
Authority: CN
Inventors: 张兰; 吴海应; 张小荛
Original assignee: Jiaxing Dali Precision Fastener Co ltd
Current assignee: Jiaxing Dali Precision Fastener Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-12-13
Anticipated expiration: 2032-08-03

Abstract

The utility model discloses a tight set screw of screw is prevented moving back by interior hexagonal relates to screw technical field, including the screw rod, the outside of screw rod is provided with the screw thread arch, and the bottom of screw rod sets up most advanced, the swivelling chute has been seted up to the intermediate position department on screw rod top, and the inside bottom of swivelling chute has seted up the inside groove, the top of screw rod is provided with spacing piece, and has the inserted bar through welded connection in the bottom of spacing piece, the bottom of inserted bar runs through the inside bottom of swivelling chute and extends to inside the groove. The utility model discloses an utilize the existence of inserted bar, can make spacing piece and screw rod connect through the inserted bar after this device is to fixed parts position, then utilize the locating hole in the spacing piece outside and parts to be connected for spacing relative parts remain stable, thereby alright restrict with the position to the screw rod, avoid the protruding cause of screw thread vibrations to appear the phenomenon of moving back the silk, increase the stability that this device is connected.

Description

Inner hexagonal anti-screw-withdrawal fastening screw

Technical Field

The utility model relates to a screw technical field specifically is a screw is tightly decided to hexagonal of moving back prevention.

Background

The fastening screw is a screw specially used for fixing the relative position of a machine element, and is fastened step by utilizing the rotary friction of a thread bulge on the outer side of the screw, but in the using process of the fastening screw, the phenomenon of thread withdrawal of the fastening screw is caused by vibration or other factors, so that the fixing connection effect of the fastening screw is weakened, and further loosening and connection disconnection phenomena are possibly caused;

through retrieval, chinese patent No. CN 210623358U, 26.05.26.2020, discloses an automatic stirring device for polypropylene granules for woven bag production, which indicates that "a groove is provided on a metal screw, a polystyrene plastic rod is inserted into the groove and is in a state of protruding out of the metal screw, so that the protruding part of the polystyrene plastic rod and a screw hole have an extrusion expansion force, thereby the screw is not easy to be withdrawn, and the screw is used for tightening a mechanical transmission shaft kit, and for tightening the kit with a relatively high forward and reverse transmission frequency, thereby effectively reducing the abnormal situations of automatic withdrawal and loosening in actual use, reducing the frequency of point inspection, improving the operating rate of mechanical equipment, and achieving the purpose of the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inner hexagonal prevents moving back tight set screw to the problem of the easy appearance of moving back the silk phenomenon that proposes in solving above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an inner hexagonal prevents moving back tight set screw, includes the screw rod, the outside of screw rod is provided with the screw thread arch, and the bottom of screw rod sets up most advanced, the swivelling chute has been seted up to the intermediate position department on screw rod top, and the inside bottom of swivelling chute has seted up the inside groove, the top of screw rod is provided with spacing piece, and the bottom of spacing piece has the inserted bar through welded connection, the bottom of inserted bar runs through the inside bottom of swivelling chute and extends to inside the inside groove, a plurality of locating holes have been seted up in the outside of spacing piece.

Preferably, the number of the positioning holes is four, and the four positioning holes are arranged on the outer side of the limiting piece at equal angles.

Preferably, the rotary tank has a regular hexagonal shape, the inner tank has a cylindrical shape, and the inner tank is disposed at a central position of an inner bottom end of the rotary tank.

Preferably, the outer side of the inserted bar is provided with an external thread, and the inner wall of the inner groove is provided with an internal thread matched with the outer side of the inserted bar.

Preferably, the tip is in a truncated cone shape, and the tip and the screw are integrally manufactured.

Compared with the prior art, the utility model provides a pair of screw is tightly decided to hexagonal prevent moving back silk has following beneficial effect:

the utility model provides a have spacing piece and inserted bar, through the existence that utilizes the inserted bar, can make spacing piece and screw rod connect through the inserted bar after this device is to fixed parts position, then utilize the locating hole in the spacing piece outside and parts to be connected for spacing relative parts remain stable, thereby alright restrict with the position to the screw rod, avoid the protruding cause of screw thread vibrations to appear the phenomenon of moving back the silk, increase the stability that this device is connected.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic front view of the cross-sectional structure of the present invention;

fig. 3 is a schematic top view of the cross-sectional structure of the present invention.

In the figure: 1. a tip; 2. a screw; 3. a limiting sheet; 4. positioning holes; 5. a threaded boss; 6. an inner tank; 7. a rotating tank; 8. and (4) inserting the rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1: referring to fig. 1-3, an inner hexagonal anti-back-threading set screw includes a screw rod 2, a thread protrusion 5 is disposed on an outer side of the screw rod 2, a tip 1 is disposed at a bottom end of the screw rod 2, a rotating groove 7 is disposed at a middle position of a top end of the screw rod 2, an inner groove 6 is disposed at a bottom end inside the rotating groove 7, a limiting piece 3 is disposed at a top end of the screw rod 2, a bottom end of the limiting piece 3 is connected with an inserting rod 8 through welding, a bottom end of the inserting rod 8 penetrates through the bottom end inside the rotating groove 7 and extends into the inner groove 6, and a plurality of positioning holes 4 are disposed on an outer side of the limiting piece 3;

the tip 1 is in a circular truncated cone shape, and the tip 1 and the screw rod 2 are integrally manufactured;

specifically, as shown in fig. 1, 2 and 3, when the device is used, the device is firstly clamped into the inside of the rotary groove 7 by using a corresponding tool through the existence of the rotary groove 7, such as an L-shaped rotary rod, and is rotatably inserted into the hole of a corresponding fixed machine part through the existence of the thread bulge 5, so that the device realizes a connection fastening function, and then in order to avoid the phenomenon of thread slipping, the screw 2 and the limiting plate 3 are connected through the existence of the limiting plate 3 and by utilizing the threaded connection relationship between the inner groove 6 and the inserting rod 8 and inserting the inserting rod 8 into the inner groove 6 by rotating the limiting plate 3, so that the machine part can be fixed and limited by the positioning hole 4 outside the limiting plate 3, so that the limiting plate 3 can be fixed and limited, and the phenomenon of thread withdrawing of the thread bulge 5 can be prevented under the limitation of the limiting plate 3.

The number of the positioning holes 4 is four, and the four positioning holes 4 are arranged on the outer side of the limiting sheet 3 at equal angles;

specifically, as shown in fig. 1, 2, and 3, by utilizing the presence of the positioning hole 4, the connection of the stopper piece 3 and the fixing member can be facilitated, so that the stopper piece 3 is in a stable state.

The rotary groove 7 is in a regular hexagon shape, the inner groove 6 is in a cylindrical shape, and the inner groove 6 is arranged at the central position of the bottom end in the rotary groove 7;

the outer side of the inserted rod 8 is provided with an external thread, and the inner wall of the inner groove 6 is provided with an internal thread matched with the outer side of the inserted rod 8;

specifically, as shown in fig. 1, 2 and 3, the rotation of the device is facilitated by the presence of the rotation groove 7, and then the connection between the device and the stopper piece 3 is facilitated by the presence of the inner groove 6.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an inner hexagonal prevents drawing back tight set screw, includes screw rod (2), its characterized in that: the outer side of the screw rod (2) is provided with a thread bulge (5), the bottom of the screw rod (2) is provided with a tip (1), a rotary groove (7) is formed in the middle position of the top end of the screw rod (2), an inner groove (6) is formed in the bottom end of the inner part of the rotary groove (7), a limiting piece (3) is arranged on the top end of the screw rod (2), an inserting rod (8) is connected to the bottom end of the limiting piece (3) through welding, the bottom end of the inserting rod (8) penetrates through the bottom end of the inner part of the rotary groove (7) and extends into the inner groove (6), and a plurality of positioning holes (4) are formed in the outer side of the limiting piece (3).

2. The hexagonal socket screw of claim 1, wherein: the number of the positioning holes (4) is four, and the four positioning holes (4) are arranged on the outer side of the limiting sheet (3) at equal angles.

3. The hexagonal socket screw of claim 1, wherein: the shape of the rotary groove (7) is regular hexagon, the shape of the inner groove (6) is cylindrical, and the inner groove (6) is arranged at the central position of the bottom end in the rotary groove (7).

4. The hexagonal socket screw of claim 1, wherein: the outer side of the inserted bar (8) is provided with external threads, and the inner wall of the inner groove (6) is provided with internal threads matched with the outer side of the inserted bar (8).

5. The hexagonal socket screw of claim 1, wherein: the tip (1) is in a circular truncated cone shape, and the tip (1) and the screw (2) are integrally manufactured.