CN202149125U

CN202149125U - Self-locking locknut assembly

Info

Publication number: CN202149125U
Application number: CN201120281505U
Authority: CN
Inventors: 杨清立
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-04
Filing date: 2011-08-04
Publication date: 2012-02-22
Anticipated expiration: 2021-08-04

Abstract

A self-locking locknut assembly relates to a locknut assembly. The self-locking locknut assembly aims to settle the following problems in the prior-art thread anti-loosening method: restriction by structure, incapability of being recycled, unsuitability for being used at the occasion with heavy load and large vibration, radial bolt bending by fastening. A main nut and an auxiliary nut are respectively provided with a first internal threaded hole which is connected with the bolt. The auxiliary nut is sleeved on the main nut. Furthermore the main nut is connected with the auxiliary nut through screw threads and an interference fit surface. The direction of the screw threads for connecting the main nut and the auxiliary nut is opposite with that of the screw threads for connecting the main nut and the auxiliary nut with the bolt. The self-locking locknut assembly is mainly used for important screw connection occasion where strong vibration exists and a pretightening force can not be applied.

Description

The self-locking anti-loosen screw nut component

Technical field

The utility model relates to a kind of anti-loosen screw nut component.

Background technique

For the screw thread of fastening purpose, require to obtain enough big stable pretightening force, unlikely generation is become flexible under operating conditions such as vibration, varying load, and claimed structure is compact as far as possible, mounting or dismounting are convenient, reusable.The common method of existing locking thread has the frictional force anti-loose method of increasing and mechanical anti-loose method.Increase the frictional force anti-loose method; Like spring washer, double nut, metal lock pad, binding nut, Toothed Lock Washer, nylon inserts lock etc. all is locking by increasing frictional force, but using effect does not have the reliability of connection in heavy duty, the big occasion of vibration; The machinery anti-loose method; Being connected in series, sticking up shape packing ring, concave cone face lock washer etc. like slotted nut, cotter pin, lock washer, wedge pressure type, duplex lock washer, steel wire all is to lean on machinery locking; Though the mechanical proof measures that has plays good locking effect, have receive structural limitations, have can not reuse, also have structure is had certain weakening.To sum up, there are various drawbacks in existing locking thread present situation.

Also occurred the Tang Shi self-locking nut in addition, it uses positive and negative rotation direction screw thread double nuts structure, and it is more that its nut total height increases, and bolt is non-tender, moment is loaded with certain requirement, operation inconvenience.In addition, also having a kind of is Accentric self locking nut, and it is fastening to make bolt produce to radially bend.

The model utility content

The purpose of the utility model provides a kind of self-locking anti-loosen screw nut component; Receive structural limitations to solve existing locking thread method; Can not reuse, be not suitable in heavy duty, vibrate big occasion use and self-locking nut operation inconvenience, the fastening problem that makes that bolt produces and radially bends.

The utility model is to address the above problem the technological scheme of taking to be: the said self-locking anti-loosen screw nut component of the utility model is made up of mother nut and secondary nut; Said mother nut and secondary nut are respectively equipped with and bolted first interior threaded hole; Said secondary nut sleeve is contained on the mother nut; And the two connects through screw thread and interference fit face, and the two thread rotary orientation that is connected of mother nut and secondary nut and mother nut are opposite with bolted thread rotary orientation with secondary nut.

The beneficial effect of the utility model is: the self-locking anti-loosen screw nut component of the utility model is the lock nut of frictionally self-locking; And frictional force is can be because of vibration, overload etc. not former thereby reduce; Reached good using effect; And need not use nonstandard bolt, and become one structure after the assembling of self-locking anti-loosen screw nut component and be convenient to transportation, easy to operate when fastening.Therefore, the utility model has fundamentally solved many deficiencies that existing nut anti-looseness exists, its reasonable in design, have convenient disassembly, repeated use, locking reliable, screw thread is stressed evenly, not limited by any service condition; Fasteningly advantage such as make bolt not produce to radially bend, significantly improve its self-locking property and working life.The utility model is mainly used in judder and can't adds the important occasion that is threaded of pretightening force.

Description of drawings

Fig. 1 is that the master of the utility model looks half sectional view, and Fig. 2 is the plan view of Fig. 1, and Fig. 3 is the main sectional view of the user mode of the utility model; Fig. 4 is that the master of mother nut 1 looks half sectional view; Fig. 5 is the plan view of Fig. 4, and Fig. 6 is that the master of secondary nut 2 looks half sectional view, and Fig. 7 is the plan view of Fig. 6.

Embodiment

Embodiment one: combine Fig. 1～Fig. 7 explanation, the self-locking anti-loosen screw nut component of this mode of execution is made up of mother nut 1 and secondary nut 2; Said mother nut 1 is respectively equipped with first interior threaded hole 7 that is connected with bolt 4 with secondary nut 2; Said secondary nut 2 is sleeved on the mother nut 1; And the two connects through screw thread and interference fit face 3, and mother nut 1 is opposite with the thread rotary orientation that bolt 4 is connected with secondary nut 2 with mother nut 1 with secondary nut 2 the two thread rotary orientation that are connected.

Embodiment two: combine Fig. 1, Fig. 2 and Fig. 4～Fig. 7 explanation; The two processes one and forms the profile of the said mother nut 1 of this mode of execution by positive hexagonal prism and cylindrical body from the bottom to top, and the cross-section area of the positive hexagonal prism of mother nut 1 is greater than cylindrical cross-section area; The profile of said secondary nut 2 is positive hexagonal prism; The cross-section area of the positive hexagonal prism of secondary nut 2 is identical with the cross-section area of the positive hexagonal prism of mother nut 1; Secondary nut 2 is provided with second interior threaded hole 8, withdrawing annular groove 9 and unthreaded hole 11; Said withdrawing annular groove 9 is arranged between first interior threaded hole 7 and second interior threaded hole 8 on the secondary nut 2; Said second interior threaded hole 8 is arranged between withdrawing annular groove 9 and the unthreaded hole 11; First interior threaded hole 7, second interior threaded hole 8 and unthreaded hole 11 coaxial settings on the secondary nut 2, the aperture of first interior threaded hole 7 on the secondary nut 2 is less than the aperture of second interior threaded hole 8, and the aperture of said second interior threaded hole 8 is less than the aperture of unthreaded hole 11; The thread rotary orientation of second interior threaded hole 8 is opposite on the thread rotary orientation of first interior threaded hole 7 on mother nut 1 and the secondary nut 2 and the secondary nut 2; The identical outside thread 12 of thread rotary orientation of second interior threaded hole 8 on the cylindrical outer side wall of mother nut 1 on processing and the secondary nut 2, the transitional surface between the positive hexagonal prism of the root of said outside thread 12 and mother nut 1 and the side, hole of said unthreaded hole 11 are interference fit face 3, and the root of said outside thread 12 is provided with the shoulder end face; A cylindrical end of mother nut 1 is arranged in second interior threaded hole 8 on the secondary nut 2, and the two connects through screw thread and interference fit face 3.Other is identical with embodiment one.

Embodiment three: combine Fig. 1, Fig. 3, Fig. 4 and Fig. 6 explanation, the said interference fit face 3 of this mode of execution is cylndrical surface or conical surface.Other is identical with embodiment one or two.

Add man-hour; Outside the positive hexagonal prism of first interior threaded hole 7 of mother nut 1 and secondary nut 2 and mother nut 1 and secondary nut 2 is not processed; After all the other are processed into; After secondary nut 2 hot chargings were to the mother nut 1, the positive hexagonal prism (outer shape) of reprocessing mother nut 1 and secondary nut 2 reached first interior threaded hole 7 that is connected with bolt 4.This structure remains integral mechanism in transportation process, guarantee that mother nut 1 is corresponding with secondary nut 2 tooth forms, provides convenience to use.

Working principle:

As shown in Figure 3; Under the self-locking anti-loosen screw nut component original state; The shoulder end face of outside thread 12 roots on the mother nut 1 and the upper shoulder end face of the unthreaded hole 11 on the secondary nut 2 fit tightly, when the self-locking anti-loosen screw nut component through bolt 4 first link 5 is connected with second link 6 fastening after, an angle is rotated in 2 continuation of secondary nut; Because of both connecting threads of mother nut 1, secondary nut 2 opposite with bolt 4 thread rotary orientations; Make mother nut 1, secondary nut 2 axial distances strengthen, thereby increase frictional force between secondary nut 2 and the bolt 4, and then reach locking purpose; Again because of in the middle of mother nut 1, the secondary nut 2 interference fit face 3 being set; After mother nut 1, secondary nut 2 axial distances increase; Do not having under the external force effect situation; Turn round by the resistance that vibrates and other factor is not enough to make secondary nut 2 overcome interference fit face 3,, reached good anti-loosing effect so the frictional force between secondary nut 2 and the bolt 4 in use can not reduce; Because of outside tensile bolt 4, also increased the frictional force between mother nut 1 and the bolt 4 simultaneously.

When needs are dismantled, need only secondary nut 2 when self-locking opposite spin to self-locking anti-loosen screw nut component is back to original state, can take off.

Claims

1. self-locking anti-loosen screw nut component, said self-locking anti-loosen screw nut component is made up of mother nut (1) and secondary nut (2); Said mother nut (1) is respectively equipped with first interior threaded hole (7) that is connected with bolt (4) with secondary nut (2); It is characterized in that: said secondary nut (2) is sleeved on the mother nut (1); And the two connects through screw thread and interference fit face (3), and mother nut (1) is opposite with the thread rotary orientation that bolt (4) is connected with secondary nut (2) with mother nut (1) with the two thread rotary orientation that is connected of secondary nut (2).

2. self-locking anti-loosen screw nut component according to claim 1; It is characterized in that: the two processes one and forms the profile of said mother nut (1) by positive hexagonal prism and cylindrical body from the bottom to top, and the cross-section area of the positive hexagonal prism of mother nut (1) is greater than cylindrical cross-section area; The profile of said secondary nut (2) is positive hexagonal prism; The cross-section area of the positive hexagonal prism of secondary nut (2) is identical with the cross-section area of the positive hexagonal prism of mother nut (1); Secondary nut (2) is provided with second interior threaded hole (8), withdrawing annular groove (9) and unthreaded hole (11); Said withdrawing annular groove (9) is arranged between first interior threaded hole (7) and second interior threaded hole (8) on the secondary nut (2); Said second interior threaded hole (8) is arranged between withdrawing annular groove (9) and the unthreaded hole (11); First interior threaded hole (7), second interior threaded hole (8) and the coaxial setting of unthreaded hole (11) on the secondary nut (2); The aperture of first interior threaded hole (7) on the secondary nut (2) is less than the aperture of second interior threaded hole (8); The aperture of said second interior threaded hole (8) is less than the aperture of unthreaded hole (11), and the thread rotary orientation of first interior threaded hole (7) on mother nut (1) and the secondary nut (2) is opposite with the thread rotary orientation of last second interior threaded hole of secondary nut (2) (8), the identical outside thread (12) of thread rotary orientation of second interior threaded hole (8) on the cylindrical outer side wall of mother nut (1) on processing and the secondary nut (2); The side, hole of transitional surface between the positive hexagonal prism of the root of said outside thread (12) and mother nut (1) and said unthreaded hole (11) is interference fit face (3); The root of said outside thread (12) is provided with the shoulder end face, and a cylindrical end of mother nut (1) is arranged in second interior threaded hole (8) on the secondary nut (2), and the two connects through screw thread and interference fit face (3).

3. self-locking anti-loosen screw nut component according to claim 1 and 2 is characterized in that: said interference fit face (3) is cylndrical surface or conical surface.