CN205823887U

CN205823887U - Simple theftproof nut

Info

Publication number: CN205823887U
Application number: CN201620161628.4U
Authority: CN
Inventors: 彭飞鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-03
Filing date: 2016-03-03
Publication date: 2016-12-21
Anticipated expiration: 2026-03-03

Abstract

This utility model provides a kind of Simple theftproof nut, belongs to field of mechanical technique.It solve the non-anti-theft quick detachable problem of existing nut.It is made up of inner core and overcoat.Inner core has the through hole regular screw threads mated with bolt；The outside one end of inner core is provided with the screw thread reversely and coordinated with through hole whorl with overcoat；The other end is provided with and allows it rotarily drive the boss of lower synchronous rotary at overcoat；Overcoat profile is conventional hexagonal type；Similarly, in overcoat, two ends are provided with the mechanism coordinated with inner core.This utility model has simple in construction, without advantages such as specific purpose tools.

Description

Simple theftproof nut

Technical field

This utility model belongs to field of mechanical technique, relates to a kind of securing member, particularly a kind of anti-theft nut.

Background technology

Existing anti-theft nut has a disadvantage in that or is because structure complexity and causes manufacturing cost higher；It is to change to make Need by special spanner by custom.

Utility model content

The purpose of this utility model is to provide for a kind of simple in construction, antitheft spiral shell that is with low cost and that operate by common wrench Female.

Anti-theft nut described in the utility model, is to be made up of inner core and overcoat.Inner core profile is stepped cylindrical, system There is the regular screw threads through hole mated with bolt；It is shaped with locking boss by locking face one end；Other end periphery is shaped with one section with logical The screw thread that hole screw thread reversely and coordinates with overcoat.Overcoat profile is conventional hexagonal shape；Correspondingly in overcoat, two ends are provided with and inner core The mechanism of cooperation.Specifically, being a step through hole in overcoat, dynamic cooperation is made in described step one end with the boss of inner core； The other end is shaped with one section of screw thread coordinated with inner core external screw thread.Inner core screws into overcoat with reverse with self through hole whorl In thus form described anti-theft nut.

Described inner core and overcoat " one section " reverse thread, its effective length determines according to following principle: its yield strength pair The moment answered is suitable with the locking torque needing locking member.

After described anti-theft nut inner core is completely screwed into overcoat, at the bottom of inner core boss, blocked the most non-lock by overcoat step protuberance Tight one end, face is concordant, and inner core boss Shen from overcoat of locking face one end goes out a conjunction slightly larger than reverse thread effective length Suitable length.

Compared with prior art, the beneficial effects of the utility model are: (1) because of simple in construction, so manufacturing process is simple With low cost；(2) profile is conventional hexagonal shape, it is not necessary to special spanner, does not change the use habit of people.

Accompanying drawing explanation

Fig. 1 is that this utility model overcoat partly cuts open front view.

Fig. 2 is overcoat A direction view.

Fig. 3 is inner core front view.

Fig. 4 is inner core top view.

Wherein, 1 overcoat；2 reverse overcoat female threads；3 overcoat step protuberances；4 step through holes；5 Stepwise inner core；6 reverse inner core external screw threads；At the bottom of 7 boss；8 locking boss；9 inner core through hole regular screw threads.

Detailed description of the invention

Below in conjunction with drawings and Examples, this utility model is described further.

A kind of Simple theftproof nut, is made up of overcoat 1 and step inner core 5.Described overcoat 1 profile is conventional hexagonal shape, Inside open a step through hole 4, be shaped with in step through hole 4 coordinate with step inner core 5 and with inner core through hole regular screw threads 9 rotation direction Contrary reverse overcoat female thread 2 and overcoat step protuberance 3；Described step inner core 5 profile is stepped cylindrical, is shaped with Coordinate with overcoat and the reverse inner core external screw thread 6 oppositely oriented with inner core through hole regular screw threads 9, be the most also shaped with locking boss 8； The axial dimension of described locking boss 8 i.e. locks boss top to the having slightly larger than reverse inner core external screw thread 6 of the length of 7 at the bottom of boss Effect length and overcoat step protuberance 3 thickness sum；The thickness of described overcoat step protuberance 3 is produced can offset coupling mechanism force Shear stress be advisable.Step inner core 5 forms Simple theftproof nut after being completely screwed into overcoat 1.

The reverse inner core external screw thread 6 of described step inner core 5 and the reverse overcoat female thread 2 of overcoat 1, its effective length is Determine according to the principle that the moment of its yield strength correspondence is suitable with the locking torque needing locking member.

When tightening operation to be carried out, as long as normally rotating nut.When the disassembling section of nut to be carried out, due to The height i.e. boss top of locking boss 8 is more than the effective length of reverse inner core external screw thread 6 to the axial dimension of 7 at the bottom of boss, outward First on step inner core 5, the reverse thread on step inner core 5 is to the motion of locking direction, after screw thread is covered, outward for set 1 Set 1 just dallies on step inner core 5, thus reaches the non-removable purpose of securing member.

Claims

1. a Simple theftproof nut, it is characterised in that: being made up of overcoat (1) and step inner core (5), described overcoat (1) is outward Shape is conventional hexagonal shape, inside opens a step through hole (4), be shaped with in step through hole (4) coordinate with step inner core (5) and with Reverse overcoat female thread (2) that inner core through hole regular screw threads (9) is oppositely oriented and overcoat step protuberance (3)；Described step Inner core (5) profile is stepped cylindrical, is shaped with and coordinates with overcoat (1) and oppositely oriented with inner core through hole regular screw threads (9) Reversely inner core external screw thread (6), is the most also shaped with locking boss (8)；The axial dimension of described locking boss (8) i.e. locks boss top End to (7) at the bottom of boss length slightly larger than the effective length of reverse inner core external screw thread (6) and overcoat step protuberance (3) thickness it With.

Simple theftproof nut the most according to claim 1, it is characterised in that: reversely overcoat female thread (2) and reverse inner core The screw thread effective length of external screw thread (6) determines according to the principle that the moment of its yield strength correspondence is suitable with locking torque.