CN101975213A

CN101975213A - Anti-loose method of nut

Info

Publication number: CN101975213A
Application number: CN 201010527364
Authority: CN
Inventors: 魏征宇; 赵国栋
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-02-16

Abstract

The invention discloses an anti-loose method of a nut, relating to fasteners and solving the anti-loose problem of the nut. The invention is characterized in that the anti-loose method comprises the following steps: 1, boring a pinhole on the nut in the radial direction; 2, assembling a bolt, a disc spring, a pressing plate and the nut together, and screwing down the nut and the bolt; 3, manufacturing a pinhole on the bolt for matching; and 4, putting an elastic straight pin into the pinholes of the nut and the bolt, wherein the straight pin is locked in the pinholes by the elastic deformation thereof. The invention preferably solves the anti-loose problem of the nut, and is particularly suitable for the conditions with bad working condition, limited room and high requirement to the anti-loose safety factor.

Description

A kind of anti-loose method of nut

Technical field

The present invention relates to fastening piece, particularly a kind of anti-loose method of nut.

Background technique

Nut is common fastening piece, is widely used in mechanical industry.Under static load, the energy self-locking conditions satisfied is threaded; The friction at nut pressure-bearing surface place also has the effect of loosening.But under impact, vibration or varying load, or when temperature variation is big, is connected with and becomes flexible, even unclamp.This just is prone to accidents.So when design is threaded, must consider locking problem.Locking root problem is to prevent relatively rotating of screw pair.Anti-loose method commonly used has:

1. increase frictional force (as shown in Figure 1 and Figure 2):, be used for the connection of of such little moment because the elastic force inequality is very unreliable more.

2. destroy screw pair (as shown in Figure 3, Figure 4): dismounting back union piece can not be used again.

3. utilize metallic member directly to pin (as shown in Figure 5): can only be used for to hold the operating mode restriction of this metallic member.

Summary of the invention

The objective of the invention is to overcome the shortcoming of prior art, a kind of anti-loose method of nut is provided, solved the locking problem of nut well.It is abominable to be specially adapted to operating mode, and the space is limited, and the demanding occasion of locking safety factor.

The present invention is achieved by the following technical solutions:

A kind of anti-loose method of nut comprises: nut, bolt, dish spring, pressing plate is characterized in that: the step of described anti-loose method is:

1. earlier nut is radially beaten pin-and-hole;

2. successively bolt, dish spring, pressing plate, nut are fitted together, and nuts and bolt is tightened then;

3. on bolt, join and make pin-and-hole;

4. then an elastic cylindrical pin is packed in the pin-and-hole of nuts and bolt, elastic cylindrical pin rises by self resiliently deformable and is locked in the pin-and-hole.

Described step elastic cylindrical pin 4. is the hollow cylinder that will make of elastic material, vertically opens the straight pin of elasticity breach along it.

After 2. described step is fitted together bolt, dish spring, pressing plate, nut, more on request with the nut pretension.

The present invention compared with prior art has the following advantages and beneficial effect:

1, the present invention does not increase the nuts and bolt overall volume, is applicable to the occasion that the space is limited.

2, vi have high safety of the present invention, be specially adapted at impact shock big, bad working environments such as temperature variation is big.

3, the present invention does not need to destroy screw pair.

4, easy installation and removal, operation is simple, and applicability is good.

Description of drawings

Fig. 1 is the Relaxation Methods that the elastic force after the back cushion circle flattens vertically compresses screw pair;

Fig. 2 acts on the Relaxation Methods that screw pair is vertically compressed to the top after utilizing two nut screwing clampings;

Fig. 3 loosens with the method for welding;

Fig. 4 loosens with the method for dashing point;

Fig. 5 utilizes lock washer that nut is pinned;

Fig. 6 is a typical application example schematic representation of the present invention;

Fig. 7 is nut structure schematic representation (plan view);

Fig. 8 is the plan view of Fig. 7;

Fig. 9 is elastic cylindrical pin structural representation (plan view);

Figure 10 is the left view of Fig. 9.

Embodiment

The invention will be further described by embodiment below in conjunction with accompanying drawing.

Shown in Fig. 6,7,8,9,10, a kind of anti-loose method of nut, its step is as follows:

1. earlier nut 1 (standard piece or self-control) is radially beaten pin-and-hole 1-1;

2. successively bolt 3, dish spring 4, pressing plate 5, nut 1 are fitted together then, and nut 1 and bolt 3 are tightened;

3. on bolt, join and make pin-and-hole 1-1;

4. then an elastic cylindrical pin 2 is packed among the pin-and-hole 1-1 of nut 1 and bolt 3, elastic cylindrical pin 2 rises by self resiliently deformable and is locked in the pin-and-hole.Nut 1 and bolt 3 are fixed together by elastic cylindrical pin 2, play locking effect.

Described step elastic cylindrical pin 2 4. is the hollow cylinders that will make of elastic material, vertically opens the straight pin of elasticity breach 2-1 along it.

After 2. described step is fitted together bolt 3, dish spring 4, pressing plate 5, nut 1, more on request with nut 1 pretension (some occasion needs pretension).

When nut 1 and bolt 3 dismountings, elastic cylindrical pin 2 is ejected, promptly detachable.

Claims

1. the anti-loose method of a nut comprises: nut (1), bolt (3), dish spring (4), pressing plate 5, and it is characterized in that: the step of described anti-loose method is:

1. earlier nut (1) is radially beaten pin-and-hole (1-1);

2. successively bolt (3), dish spring (4), pressing plate (5), nut (1) are fitted together then, and nut (1) and bolt (3) are tightened;

3. on bolt (3), join and make pin-and-hole (1-1);

4. then an elastic cylindrical pin (2) is packed in the pin-and-hole (1-1) of nut (1) and bolt (3), elastic cylindrical pin (2) rises by self resiliently deformable and is locked in the pin-and-hole.

2. according to the anti-loose method of the described nut of claim 1, it is characterized in that: described step elastic cylindrical pin (2) 4. is the hollow cylinder that will make of elastic material, vertically opens the straight pin of elasticity breach (2-1) along it.

3. according to the anti-loose method of the described nut of claim 1, it is characterized in that: after 2. described step is fitted together bolt (3), dish spring (4), pressing plate (5), nut (1), more on request with nut (1) pretension.