CN201794877U

CN201794877U - Elastic self-lock pin

Info

Publication number: CN201794877U
Application number: CN2010202970461U
Authority: CN
Inventors: 徐鸥; 沈康; 王海斌
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baosteel Special Steel Co Ltd
Priority date: 2010-08-19
Filing date: 2010-08-19
Publication date: 2011-04-13
Anticipated expiration: 2020-08-19

Abstract

The utility model discloses an elastic self-lock pin, which is classified as a split pin. The split pin comprises an elastic clamping section, an elastic ring section and an elastic straight section, which are connected in sequence, and the elastic clamping section is circular arc-shaped. The elastic self-lock pin provided by the utility model meets the requirement for axial positioning of the pin shaft, meanwhile, achieves a self axial fixing effect, is convenient to dismount, has a simple structure, and can be used repeatedly.

Description

A kind of elasticity self-lock pin

Technical field

The utility model relates to a kind of fixing device, relates in particular to a kind of self-lock pin.

Background technique

At mechanical field; usually can use 1 pair of plural object of bearing pin as shown in Figure 1 to connect,, generally can adopt a end to bore a through hole 11 at bearing pin simultaneously in order to make bearing pin 1 can realize axial restraint; installation code self-lock pin in through hole then, thus bearing pin 1 can not come off.

Standard openings pin 2 as shown in Figure 2 is a kind of mechanical parts commonly used, and national correlation department stipulates also that to the various parameters of cotter pin the concrete NBS of carrying out is GB91-86.Standard openings pin 2 is to be that semicircular bearing pin bending forms by sectional shape, is made up of annulus 21, short cotter pilotage 22, long cotter pilotage 23 3 parts, lacks cotter pilotage 22 and is combined into circular cylinder with long cotter pilotage 23.After cotter pin 2 is by the through hole on the bearing pin 1, more respectively will long cotter pilotage 23 and short cotter pilotage 22 outwardly-bent, just can play the effect of fixed pin shaft.When dismounting cotter pin 2, bandy long cotter pilotage 23 is curved inwardly with short cotter pilotage 22 resets earlier, is that cotter pin 2 reverts to original cylindrical shape, and then cotter pin is taken out from through hole 11.

Because the standard openings pin is when mounting and dismounting, all will carry out bending to long cotter pilotage and short cotter pilotage, the intensity of cotter pin itself is not again very high, because if the intensity higher position is not flexible, therefore the standard openings pin is cut off easily, does not reach the effect of carrying out axial restraint.Simultaneously because cotter pin is in when installation and removal, repeatedly to long cotter pilotage and short cotter pilotage carry out outwardly-bent with curve inwardly, the crooked position of cotter pin is fractureed, the working life of cotter pin is not long.In addition, the reset cylindrical body that forms of used long cotter pilotage and short cotter pilotage is not a rounding very, therefore can make troubles to rising to reuse, and therefore existing standard openings pin belongs to and one-time fixes part, is applicable to the occasion of non-frequent dismounting.

Summary of the invention

The purpose of this utility model provides a kind of elasticity self-lock pin; it can satisfy the requirement of bearing pin being carried out axial restraint, and it also will possess the function of self-axial restraint simultaneously, but also should be convenient to installation and removal; can use repeatedly, it is simple so that standardization and large-scale production that structure is wanted.

In order to realize the foregoing invention purpose, the utility model provides a kind of elasticity self-lock pin, and it is a cotter pin, and described cotter pin comprises: an elasticity clamp segment of Xian Jieing, an elastic ring section and an elasticity straight section successively, described elasticity clamp segment is circular arc.

Preferably, described elasticity self-lock pin is a spring steel self-lock pin.

Preferably, described elasticity self-lock pin also comprises an elastic guide section, and it is located at the front end of described elasticity clamp segment, and the front end end of described elastic guide section is upturned and described elasticity straight section forms an acute angle angle.

Preferably, along the axial direction of elasticity self-lock pin, stretch out forward than the front end end of elastic guide section the front end end of described elasticity straight section.This design is to be installed in the bearing pin for the ease of the elasticity self-lock pin.

Preferably, the radial cross section of described elasticity self-lock pin is circular.

When using this elasticity self-lock pin, at first the elasticity straight section is inserted in the pin shaft hole of bearing pin, realize axially locating, because this self-lock pin is the elasticity self-lock pin, so the angle that elasticity clamp segment and elasticity straight section form can open under the effect of external force, this moment, the elastic ring section produced inside clamping force, and this clamping force is clamped bearing pin, makes the elasticity self-lock pin can not come off.

Elasticity self-lock pin described in the utility model both can satisfy the axially locating to bearing pin, can also realize self-axial restraint simultaneously.It is for convenience detach, and is simple in structure, can use repeatedly.

Description of drawings

Come elasticity self-lock pin described in the utility model is described further below in conjunction with the drawings and specific embodiments.

Fig. 1 is existing pin shaft structure schematic representation.

Fig. 2 is existing standard openings pin structure schematic representation.

Fig. 3 is the structural representation of elasticity self-lock pin in a kind of exemplary embodiment described in the utility model.

Fig. 4 is the using process figure of elasticity self-lock pin shown in Figure 3.

Embodiment

As shown in Figure 3, the radial cross section of present embodiment medi-spring steel self-lock pin 3 is circular, and it comprises: the straight section 31 of Xian Jieing, ring sections 32, clamp segment 33 and guide section 34 successively.Clamp segment 33 is circular arc, is complementary with the excircle configuration of bearing pin.The front end end of guide section 34 is upturned and straight section 31 forms an acute angle angle.Along the axial direction of spring steel self-lock pin 3, stretch out forward than the front end end of guide section 34 the front end end of straight section 31.

As shown in Figure 4, during use straight section 31 is installed in the pin shaft hole 22, is used for bearing pin 2 is carried out axially locating.After straightway 31 entered pin shaft hole 22, guide section 34 just contacted bearing pin.As the thrust F that acts on straight section 31 during along the axial-movement of pin shaft hole 22, because the axis of guide section 34 is certain angle of inclination rather than parallel with the axis of straight section 31, so the Normal direction along guide section 34 and bearing pin 2 just produces a normal component of force f, this normal component of force f promotes guide section 33 and clamp segment 32 is opened, and finally make clamp segment 32 cover the outer surface of bearing pin fully, straight section 31 and clamp segment 33 are subjected to external force and when opening, because the loop configuration of ring section 33, produce the internal force that inwardly shrinks, clamp segment 33 is inwardly clamped.Clamp segment 33 is circular arc simultaneously, its circular arc matches with the outer surface circular arc of the bearing pin 2 that is cooperated, under the cooperation of ring section 32 clamping forces that produce and arc surface, make the clamp segment 33 and the fitting surface of bearing pin 2 produce bigger frictional force, make spring steel self-lock pin 3 can not come off.

During dismounting, oppositely knock straight section 31, make along guide section 34 normal component of force f of Normal direction generation with bearing pin 2, this normal component of force f promotes guide section 33 and clamp segment 32 is opened, and makes spring steel self-lock pin 3 separate with bearing pin 2.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.

Claims

1. an elasticity self-lock pin is a cotter pin, it is characterized in that, described cotter pin comprises:

An elasticity clamp segment of Xian Jieing, an elastic ring section and an elasticity straight section successively, described elasticity clamp segment is circular arc.

2. elasticity self-lock pin as claimed in claim 1 is characterized in that, it is a spring steel self-lock pin.

3. elasticity self-lock pin as claimed in claim 1 or 2 is characterized in that, also comprises an elastic guide section, and it is located at the front end of described elasticity clamp segment, and the front end end of described elastic guide section is upturned and described elasticity straight section forms an acute angle angle.

4. elasticity self-lock pin as claimed in claim 3 is characterized in that, along its axial direction, stretch out forward than the front end end of elastic guide section the front end end of described elasticity straight section.

5. elasticity self-lock pin as claimed in claim 3 is characterized in that, its radial cross section is circular.