CN2672354Y

CN2672354Y - Automatic locking nut

Info

Publication number: CN2672354Y
Application number: CN 200420001671
Authority: CN
Inventors: 陆志国
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-01
Filing date: 2004-02-01
Publication date: 2005-01-19
Anticipated expiration: 2014-02-01

Abstract

The utility model provides an automatic locking nut, comprising two parts of a nut main body and a locking torsion spring. A working thread is arranged on the inner wall of the nut main body, and the section shapes of the working thread and the locking torsion spring are consistent. The provided position of the working thread is one axial part of the inner wall of the nut main body, and the rest part to the opening margin of the nut main body is a locking torsion spring seat. The locking torsion spring is arranged in the locking torsion spring seat, and one end of the locking torsion spring is positioned inside the torsion spring fixing slot of the end part of the opening margin. An annular locking torsion spring rotating slot is arranged on the inner wall of the nut main body of the base portion of the locking torsion spring seat in a radial direction, and a locking torsion spring rotating head extends out the locking torsion spring rotating slot. When the automatic locking nut is particularly implemented, the section of the locking torsion spring is in a triangle, and is matched with a screw outer thread. After the utility model changes a telescopic through hole on the wall of the existing nut main body into a radial annular slot, the problems that the locking torsion spring easily collides the wall, is easily deformed, and is inconvenient to be operated are effectively solved.

Description

The auto lock nut

Affiliated technical field

The utility model belongs to a kind of fastening piece, relates in particular to a kind of the use also with the screw rod coupling and can prevent the nut assembly that screw rod comes off voluntarily.

Background technique

03232016.7 Chinese patent " auto lock nut assembly " of my application provides a kind of turn easy and convenient to the Consumer, anti-loosening effective nut.This auto lock nut assembly comprises nut main body and torsion spring two-part, the inwall of nut main body is provided with interior working thread, and have a torsion spring telescopic hole, the direction in this hole is consistent with interior working thread direction, interior working thread offer the axial part that the position only limits to the nut main body inwall, to the remaining part of nut main body peristoma be the torsion spring seat; Torsion spring places the torsion spring seat, and the one end is positioned in the torsion spring fixed groove of peristoma end, and the other end stretches in the torsion spring telescopic hole.During operation, when nut when tightening direction rotates, also with screw rod sense of rotation motion, in the torsion spring afterbody retraction telescopic hole, at this moment, the diameter of torsion spring is in the state of expanding to torsion spring; When nut when rotational direction rotates, also with screw rod sense of rotation motion, the torsion spring afterbody then stretches out outside the telescopic hole torsion spring, at this moment, the diameter of torsion spring is in deflated state, relies on this reposition force of torsion spring to tighten screw rod, thereby solves the nut loosening problem.But this nut is when reality is used, and exists locking torsion spring shape yielding, and assembling and operation are not defectives very easily.

Summary of the invention

For overcoming the deficiency of above-mentioned nut, the utility model provides a kind of improved auto lock nut, and this nut has better work practicability.

This auto lock nut, comprise nut main body and locking torsion spring two-part, the inwall of nut main body is provided with working thread, the sectional shape of working thread and locking torsion spring is consistent, working thread offer the axial part that the position is the nut main body inwall, be locking torsion spring seat to the remaining part of nut main body peristoma; The locking torsion spring places locking torsion spring seat, the one end is positioned in the torsion spring fixed groove of peristoma end, its main points are: on the inwall of locking torsion spring seat base portion nut main body, radially have an annular locking torsion spring swivelling chute, locking torsion spring swivel head stretches out outside the locking torsion spring swivelling chute.

During concrete enforcement, the cross section of locking torsion spring is triangular in shape, matches with the screw rod outside thread.

Beneficial effect: the utility model is with the original flexible through hole on the nut main body wall, after making radial ringed groove into, the locking torsion spring easily is rebuffed when efficiently solving operation, yielding problem, moreover, with torsion spring Cross section Design triangularity, match with the screw rod outside thread, therefore, torsion spring can not damage screw flight in operating process.

Description of drawings

Fig. 1 is the nut main body vertical section structure schematic representation after torsion spring is taken out;

Fig. 2 is the torsion spring structural representation.

Embodiment

Referring to Fig. 1, Fig. 2.By nut main body 1 and locking torsion spring 4 this auto lock nuts dimerous, the profile of nut main body 1 can be multiple shape, then is hexagon usually.Nut main body 1 inwall from end beginning to the middle part or 2/3rds be provided with working thread 2, the remaining part to the other end peristoma is locking torsion spring seat 3 again; Stop on the wall of position nut main body 1 at working thread 2, have a locking torsion spring swivelling chute 8, the offering the position and should meet the outer wall that locking torsion spring swivel head 6 just in time stretches out nut main body 1 from the center, the principle that locking torsion spring swivel head about 6 is bumped less than the groove two ends of this groove.Locking torsion spring 4 (steel wire torsion spring) places locking torsion spring seat 3, one end 5 embeds the locking torsion spring fixed groove 7 interior riveted fixing of peristoma end, the other end is promptly locked 6 outer walls that stretch out nut main body 1 through locking torsion spring swivelling chute 8 of torsion spring swivel head, and have certain length, so that release socket wrench specially adapted for it operation.

The cross section of torsion spring 4 is triangular in shape, matches with the screw rod outside thread, and be the plane towards the inwall of the nut main body 1 of torsion spring seat 3, make both planes and plane contact.Certainly the cross section of torsion spring 4 also can be other shape, when mainly being consideration work so that the protection screw thread.

During operation, when nut when tightening direction rotates, also with screw rod sense of rotation motion, at this moment, the diameter of torsion spring 4 is in the state of expanding to torsion spring 4; When nut main body 1 when rotational direction rotates, also with screw rod sense of rotation motion, at this moment, the diameter of torsion spring 4 is in deflated state to torsion spring 4, relies on this reposition force of torsion spring 4 to tighten screw rod, thereby solves the nut loosening problem.If nut need be reused, can adopt to head into locking torsion spring swivel head 6 and make the diameter of torsion spring 4 be in the method for revolving screw rod under the state of expanding again, screw rod is screwed out.

According to above principle, can produce all size that matches with regular screw threads, inch screw thread, the auto lock nut of shape, the protection domain of this patent power is not confined on the hexagon nut yet.

Claims

1. auto lock nut, comprise nut main body (1) and locking torsion spring (4) two-part, the inwall of nut main body (1) is provided with working thread (2), the sectional shape of working thread (2) and locking torsion spring (4) is consistent, working thread (2) offer the axial part that the position is nut main body (a 1) inwall, be locking torsion spring seat (3) to the remaining part of nut main body (1) peristoma; Locking torsion spring (4) places locking torsion spring seat (3), one end (5) is positioned in the torsion spring fixed groove (7) of peristoma end, it is characterized in that: on the inwall of locking torsion spring seat (3) base portion nut main body (1), radially have an annular locking torsion spring swivelling chute (8), locking torsion spring swivel head (6) stretches out outside the locking torsion spring swivelling chute (8).

2. a kind of auto lock nut according to claim 1 is characterized in that: the cross section of locking torsion spring (4) is triangular in shape, matches with the screw rod outside thread.