CN200993149Y

CN200993149Y - Eccentric self-locking nut

Info

Publication number: CN200993149Y
Application number: CN 200620168485
Authority: CN
Inventors: 魏民
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2007-12-19
Anticipated expiration: 2016-12-22

Abstract

The utility model discloses an eccentric self locking nut, including a main body with threads, which has the technical key points of that one side of the main body is provided with an eccentric cover, a self locking ring which is arranged above the main body is internally provided at an eccentric spigot which is connected with the eccentric cover, inner threads of the main body are the same with the inner threads of the self locking ring, thread central lines of the main body and the self locking ring are on the same axial central line, an outside diameter of the eccentric cover is the same with the axial central line of an inside diameter of the eccentric spigot in the self locking ring, the axial central line and the thread central line deviate on the same eccentric shaft axes. The utility model radically solves the problem of the decelerating trend deficiency which is existed in the existing nut locking, which has the advantages of a reasonable design, a convenient unloading, a repeatable use, a reliable locking and is not influenced by the condition limits, which remarkably increases the self locking property and the service life.

Description

Accentric self locking nut

Technical field

The utility model relates to a kind of fastening piece that machinery works the effect of being threaded that is used for, and particularly a kind ofly not limited by any service condition, and relies on nut itself to prevent the Accentric self locking nut of nut loosening fully.It mainly is applicable to the important scyewed joint occasion that often is in judder.

Background technique

Usually machinery utilizes fastening piece to connect; general rely on self screw thread and built-in anti-slow part between nut and screw arbor assembly locking, this mainly contains following several: the anti-slow ring type nut of built-in nylon, built-in anti-slow coil spring formula nut, change nut thread tooth form formula nut, built-in anti-slow pin (ball) self-locking nut, grooved nut and cut the anti-slow Castellated nut of elasticity etc.Other is locking to utilize nut and the combination of additional anti-release member in addition, and it has: additional springs packing ring, lock washer, utilize tackiness agent, locking or the like towards deformation point.Above anti-loose method cuts both ways, and can only satisfy certain usage requirement, and anti-slow strength deficiency is to reach locking purpose.Built-in anti-slow pin (ball) has solved the drawbacks of numerous anti-slow nuts substantially though the anti-slow intensity of self-locking nut is enough, easily makes during its self-locking to connect screw flight generation local plastic deformation, repeatedly uses and can destroy screw flight, influences screw rod working life.

The model utility content

The purpose of this utility model provides a kind of Accentric self locking nut, it has fundamentally solved the problems such as anti-slow strength deficiency that existing nut anti-looseness exists, its reasonable in design, has easy accessibility, reuse, locking reliable, be not subjected to advantages such as any service condition restriction, significantly improve its self-locking property and working life.

The purpose of this utility model is achieved in that this self-locking nut comprises threaded body, its technological points is: body one end is provided with eccentric bushing, be assembled in the built-in eccentric seam that joins with eccentric bushing of self-locking ring of body top, the internal thread of body is identical with the internal thread of self-locking ring, and its thread center's line is on same longitudinal center line, the longitudinal center line of the eccentric seam internal diameter in the external diameter of eccentric bushing and the self-locking ring is identical, and the departing from same eccentric axis of its longitudinal center line and thread center's line.

Under original state, be provided with and be less than or equal to half axial clearance of lead of screw thread between described self-locking ring lower end surface and the body upper-end surface.

Because body one end of the present utility model is provided with eccentric bushing and self-locking ring built-in and the eccentric seam that eccentric bushing joins, the internal thread of eccentric bushing and self-locking ring is identical, and its thread center's line is on same longitudinal center line, the external diameter of eccentric bushing is identical with the longitudinal center line of eccentric seam internal diameter, and departing from same eccentric axis of its longitudinal center line and thread center's line, so when needing locking, as long as self-locking ring is rotated relative to body, will make on initial concentric in it, following interior threaded hole is offset, internal thread on the self-locking ring blocks the outside thread of coupled screw rod, produce radial force and frictional force, can prevent that coupling nut is loosening.Simultaneously, self-locking ring is subjected to the internal thread anastomosis after rotating, and it is moved axially press to body.When needs dismounting self-locking nut, the relative body of self-locking ring is gone back to initial position, self-locking ring is resetted, promptly rotatable body unloads self-locking nut smoothly, and easy accessibility is not limited by any service condition.Because coupled screw rod coincide in rotation process all the time with the screw thread that connects of self-locking nut, so, not injuring intermeshing screw thread, screw rod and self-locking nut are exhausted can be reused, and significantly improves nut self-locking property and working life.Large eccentricity is apart from big more more for the self-locking ring rotation angle, and self-lock force is just big more, and anti-loosing effect is just good more.Therefore, this self-locking nut is specially adapted to often take place the important scyewed joint place of judder.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is a kind of concrete structure schematic representation of the present utility model.

Fig. 2 is the sectional view of Fig. 1 along the A-A line.

Fig. 3 is a kind of user mode schematic representation of the utility model.

Embodiment

Describe concrete structure of the present utility model in detail according to Fig. 1～3.This Accentric self locking nut is made up of body 1 and self-locking ring 2 two-part.Wherein an end of body 1 is provided with eccentric bushing 4, is assembled in the self-locking ring 2 built-in eccentric seams 3 that join with eccentric bushing 4 of body 1 top.The internal thread of body 1 is identical with the internal thread of self-locking ring 2, and its thread center's line is on same longitudinal center line.When initial mounting point, the longitudinal center line of eccentric seam 3 internal diameters that the external diameter of eccentric bushing 4 and self-locking ring 2 are interior is identical, and the departing from same eccentric axis of its longitudinal center line and thread center's line.At this moment, self-locking nut is the same with plain nut, can free-handly smoothly be screwed on the same size screw rod 8.Add man-hour, the eccentric seam 3 in the self-locking ring 2 and the connecting sleeve 4 of body 1 adopted Ying to cooperate or sticked with glue knot and fixed.Under original state, be provided with and be less than or equal to half axial clearance (as shown in Figure 1) of lead of screw thread between self-locking ring 2 lower end surfaces and body 1 upper-end surface.In order to strengthen the self-lock ability of body 1 better, between eccentric bushing 4 tops of the inner and body 1 of eccentric seam 3 that can also be in self-locking ring 2 the non-metallic gasket (not shown) is set, so that self-locking ring 2 rotates when compressing, generation prevents further that as the anti-loosing effect of built-in anti-slow spring nut self-locking ring 2 is loosening when locking state.

When utilize self-locking nut of the present utility model by packing ring with coupled 6,7 and attachment bolt 8 locking after, when needing self-locking, self-locking ring 2 relative bodies 1 are rotated an angle and get final product along screwing the nut direction, operate very simple.This moment, self-locking ring 2 internal thread centers will be offset (connecting screw rod 8 or main body 1 internal thread relatively), under this wobbler action, make self-locking ring 2 internal threads connect screw rod 8 outside threads relatively and produce very big radial force in the engagement place, according to mechanics principle, body 1 internal thread connects screw rod 8 outside threads relatively and also produces a very big radially counter-force in the engagement place, under above-mentioned two radial force effects, make self-locking nut and coupled screw rod 8 firmly locked.This self-lock force strengthens with eccentric self-locking ring 2 relative body 1 rotation angles, thereby realizes locking, anti-slow locking function.

When needs dismountings self-locking nut, as long as the opposite direction with it during along self-locking resets self-locking ring 2, the central lines of the center line of self-locking ring 2 internal threads and body 1 internal thread just can be dismantled self-locking nut smoothly, and is the same with plain nut, repeated use.

Claims

1, a kind of Accentric self locking nut, comprise the body that has internal thread, it is characterized in that: body one end is provided with eccentric bushing, be assembled in the built-in eccentric seam that joins with eccentric bushing of self-locking ring of body top, the internal thread of body is identical with the internal thread of self-locking ring, and its thread center's line is on same longitudinal center line, and the longitudinal center line of the internal diameter of the eccentric seam in the external diameter of eccentric bushing and the self-locking ring is identical, and the departing from same eccentric axis of its longitudinal center line and thread center's line.

2, Accentric self locking nut according to claim 1 is characterized in that: under original state, be provided with and be less than or equal to half axial clearance of lead of screw thread between described self-locking ring lower end surface and the body upper-end surface.