CN201687837U

CN201687837U - Lock nut

Info

Publication number: CN201687837U
Application number: CN2010202176405U
Authority: CN
Inventors: 黎应泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2010-12-29
Anticipated expiration: 2020-06-01

Abstract

The utility model discloses a lock nut which comprises a nut body, wherein a retaining groove is formed in the nut body; a rubber ring and a compression ring are arranged in the retaining groove; the compression ring is arranged on the outer side of the rubber ring; a first guiding inclined surface is arranged in the nut body; a second guiding inclined surface is arranged on the compression ring; the upper end surface and the lower end surface of the rubber ring are matched with the first and the second guiding inclined surfaces respectively; when the nut body is in use, the rubber ring is in interference fit with the inner side of the retaining groove and the compression ring as well as the rubber ring is in interference fit with a screw rod. The nut is screwed without other special tools, so that the use is convenient; and the screwed nut can't be loosened due to vibration.

Description

A kind of lock nut

Technical field

The utility model relates to a kind of Component that are used to be fastenedly connected, particularly a kind of lock nut.

Background technique

Need use a large amount of nuts in fields such as railway, bridge, airport, aviations and carry out the fastening of equipment, but under the violent vibration environment that various mechanical motion produce, common nut tends to be shaken pine and the inefficacy that comes off, and leads to major accident.Therefore usually the nut outside of screw threads for fastening parts around on a few circle iron wires, carry out locking.In fact this locking measure can only prevent that nut from coming off, and can not make nut anti-looseness, but when nut unclamps, has existed huge potential safety hazard, therefore develops a kind of can the repeated use, and the good special-purpose lock nut of effect just seems very necessary.

In order to solve the locking problem of nut, a large amount of scientific experimentations and research have been done by lot of domestic and international enterprise.They adopt locking plate, ratchet, inserted sheet, pin, distortion screw thread, nylon embedded piece and chemical gluing method, even with the method for a plurality of nuts stack, solve the locking problem of nut.Facts have proved above measure owing to there is the shortcoming that can't overcome, for example need special-purpose instrument, nut fastener corrosion special tool is over a long time used inefficacy, can't regulate to cause equipment to be scrapped, the high low temperature of chemical material, damp and hot inefficacy can disposablely be used to the greatest extent etc.Therefore to a certain extent, the locking problem of nut does not obtain satisfied solution to a certain extent over a long time.

Summary of the invention

In order to address the above problem, the purpose of this utility model be to provide a kind of need not be extra special tool and can be behind the nut screwing clamping because of the loosening lock nut of vibrations.

The technological scheme that the invention for solving the technical problem adopted is: a kind of lock nut, comprise nut body, be provided with an antiratchetting groove in the described nut body, be provided with a glue ring and a pressure ring in the described antiratchetting groove, pressure ring is positioned at the glue ring outside, be provided with first guiding surface in the nut body, pressure ring is provided with second guiding surface, the upper-end surface of glue ring and lower end surface are suitable with first and second guiding surface respectively, when nut body is in user mode, between the inboard of described glue ring and antiratchetting groove and the pressure ring and and screw rod between be interference fit.

Technique scheme also can have following improvement project: the outside of described antiratchetting groove is provided with a fastening step.

The beneficial effects of the utility model are: owing to be provided with an antiratchetting groove in the described nut body, be provided with a glue ring and a pressure ring in the described antiratchetting groove, fastening nut need not be extra special tool, easy to use, behind nut screwing clamping, between the inboard of described glue ring and antiratchetting groove and the pressure ring and and screw rod between be interference fit, the glue ring produces horizontal and vertical pressure to nut body, thereby the glue ring produces pressure to the nut body internal surface, in vibrations, can not become flexible after making nut screwing clamping, so the utility model need not extra special tool come nutting and can not become flexible because of vibrations behind the nut screwing clamping.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is an axial section structural representation of the present utility model;

Fig. 2 is the structure sectional view of user mode of the present utility model.

Embodiment

With reference to Fig. 1, Fig. 2, a kind of lock nut of the utility model, comprise nut body 1, be provided with an antiratchetting groove 2 in the described nut body 1, be provided with a glue ring 3 and a pressure ring 4 in the described antiratchetting groove 2, pressure ring 4 is positioned at glue ring 3 outsides, be provided with first guiding surface 11 in the nut body 1, pressure ring 4 is provided with second guiding surface 41, the upper-end surface of glue ring 3 and lower end surface are respectively with first, two guiding

surfaces

11,41 is suitable, when nut body is in user mode, between the inboard of described glue ring 3 and antiratchetting groove 2 and the pressure ring 4 and and screw rod 5 between be interference fit, glue ring 3 is extruded distortion and part is clamp-oned between the thread of screw rod 5 and between the thread of nut body 1, as shown in Figure 2, make cooperating between nut body 1 and the screw rod 5 produce very strong compressing power and frictional force, play locking effect.

Technique scheme also can have following improvement project: the outside of described antiratchetting groove 2 is provided with a fastening step 21.

Pressure ring 4 of the present utility model is generally metallic material and makes, and glue ring 3 is generally nylon material and makes.The utility model is thickeied on the basis of original plain nut, at thickened portion, has carried out locking design, is not suffering a loss aspect effective mechanical strength to guarantee that this nut is compared with common nut.Pressure ring produces a pressure to the glue ring and forces the glue annular strain fastening nut time when we construct, we have designed the deformation direction that the glue ring is controlled on two 60 ° inclined-plane for the distortion of controlling the glue ring, the angle of inclination that is first and second guiding

surface

11,41 is 60 degree, guiding by these two inclined-planes, the direction of glue annular strain is controlled in the direction towards internal diameter, the glue annular strain stops when pressure ring stops the pressure of glue ring, and the glue ring produced horizontal and vertical pressure to nut body 1 when the glue annular strain stopped.Simultaneously the nut body internal surface is produced comprehensive pressure, by producing extruding force and frictional force between internal strain of glue ring and the screw rod, produce extruding force and frictional force between outer distortion and the nut, thereby reach locking effect, in vibrations, can not become flexible after making nut screwing clamping.The angle of inclination of above-mentioned 60 degree is general design, also can be 40 degree, 30 degree, 75 degree etc.

In addition, the utility model is not limited to above-mentioned mode of execution, as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection domain of the present utility model.

Claims

1. lock nut, comprise nut body (1), it is characterized in that: be provided with an antiratchetting groove (2) in the described nut body (1), be provided with a glue ring (3) and a pressure ring (4) in the described antiratchetting groove (2), pressure ring (4) is positioned at glue ring (3) outside, be provided with first guiding surface (11) in the nut body (1), pressure ring (4) is provided with second guiding surface (41), the upper-end surface of glue ring (3) and lower end surface are respectively with first, two guiding surfaces (11,41) suitable, when nut body is in user mode, between the inboard of described glue ring (3) and antiratchetting groove (2) and the pressure ring (4) and and screw rod between be interference fit.

2. lock nut according to claim 1 is characterized in that: the outside of described antiratchetting groove (2) is provided with a fastening step (21).