CN2200720Y

CN2200720Y - Double-locking anti-loose combined nut

Info

Publication number: CN2200720Y
Application number: CN 94211411
Authority: CN
Inventors: 韦林
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-10
Filing date: 1994-05-10
Publication date: 1995-06-14
Anticipated expiration: 2004-05-10

Abstract

The double locking and anti-loose combined nut is used in solving the problem of automatic loosening of nut in screw connection and fastening occasion in mechanical field. A plurality of axial grooves or small holes are processed on a nut, a plurality of slender pins which can be bent are processed on a spring washer, and the slender pins of the washer are correspondingly penetrated or welded into the axial grooves or the small holes of the nut, so that the nut is formed into a combined nut which can be directly used for threaded connection and fastening. When the nut is installed, the combined nut is sleeved on the anti-loosening bolt and screwed, and the spring washer is elastically deformed to generate frictional resistance to lock the nut. The slender pin of the washer is buckled into the radial small hole or the concave at the tail end of the anti-loose bolt rod for locking, so that the nut and the bolt are prevented from loosening and rotating, and the aim of double locking and anti-loose is fulfilled.

Description

Combined nut with double locking and anti-loose

The utility model relates to a kind of scyewed joint and fastening locking device in the mechanical field.

Many scyewed joint and fastening occasion all need additional locking device in mechanical field, prevent under dynamic load or fierce vibrational state the phenomenon that nut gets loose automatically.Locking device has varied, can be summed up as two big class ways usually.First method is to reach locking purpose by the frictional force that increases between the nuts and bolt.For example: in scyewed joint with when fastening, increase spring washer under nut, behind the fastening nut, the pressure that utilizes packing ring generation resiliently deformable to produce makes often to keep certain surface friction drag to get loose to prevent nut between the nuts and bolt.But this method reliability is lower, under judder, still can occur the nut phenomenon that gets loose after working long hours, and the wedge angle of spring washer can scratch the supporting surface of part.Simultaneously, owing to increased the quantity of part, install more loaded down with trivial detailsly, packing ring appears in regular meeting loses problems such as neglected loading.

Second method is to utilize mechanical structure that the nuts and bolt of tightening is fused, and eliminates between them may reach locking purpose in relative rotation.For example: cotter pin, be exactly behind fastening nut, the radial groove of slotted nut and the radial direction through hole of bolt shank end are passed in cotter pin, they are fused, afterbody with cotter pin separates fastening then, and what pine changeed between the elimination nuts and bolt may prevent that nut from getting loose.Though this method reliability height requires highly to the manufacturing of part, installation precision, using scope is restricted, and number of spare parts is many, exists cotter pin to lose easily or neglected loading, and problem such as perhaps fracture.

The purpose of this utility model provides a kind of in scyewed joint with when fastening, utilizes the assembled nut of surface friction drag and the dual locking of mechanical structure.It can prevent effectively that nut from getting loose.

The purpose of this utility model is achieved in that on nut thread hole circle periphery or the edge, outer ring is processed with several axial notches or aperture, on spring washer, be processed with some bent elongated pin, elongated pin on the packing ring is penetrated or is welded direct in the axial notch or aperture of nut, make both be combined into one and can be directly used in scyewed joint and fastening assembled nut, being inserted in chek bolt then tightens, the end of chek bolt bar is processed with some radial grooves or small through hole, behind the nut screwing clamping, spring washer generation resiliently deformable produces pressure, makes the certain surface friction drag locking nut of maintenance between the nuts and bolt.The elongated pin bending that to pass or be welded on the spring washer in nut axial notch or the aperture at last buckles into the radial groove or the interior also locking of aperture of chek bolt, after being tightened, spring washer, nuts and bolt fuse, eliminate the possibility that pine changes between them, thereby realize that surface friction drag and the dual locking of mechanical structure prevent that nut from getting loose, improve the purpose of scyewed joint and fastening reliability.

The utility model is by improving the structure of nut and spring washer, both are combined into an assembled nut that can use separately, pin, spring washer, nut three in present scyewed joint and the fastening locking device are combined into one, locking and the mechanical locking advantage of performance friction, overcome its shortcoming, realize the two-bolt lock jack panel, and when wherein a certain locking function lost efficacy, an other locking function works equally, thereby improves scyewed joint and fastening reliability.Simultaneously, owing to reduced the quantity of part, enlarged the Applicable scope of locking device, improved mechanical efficiency of assembling, solved when installing, pin, packing ring small part are lost easily, the problem of neglected loading.So in machinery production, have easy realization and simple and practical practical significance.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.Accompanying drawing is the sectional view according to the locking assembled nut of dual locking that the utility model proposes.Below in conjunction with its details of description of drawings and working condition.

This scyewed joint comprises that 1, one of a chek bolt is processed with the nut 2 of axial notch or aperture, and a spring washer 3 that is processed with elongated pin, and scyewed joint is in dual locking state in the accompanying drawing.Part 4 is coupled and fastening workpiece.

During installation, the elongated pin of spring washer 3 is penetrated or is welded in the axial notch or aperture of nut 2, make it to become an assembled nut, and then be inserted in the chek bolt 1 and tighten, after tightening, again the bending of the elongated pin of spring washer 3 is buckled in the radial hole of chek bolt 1 or the groove and lock, thereby realize dual locking, prevent that nut 2 from getting loose.

Claims

1, the locking assembled nut of dual locking, it is characterized in that on the tapped hole circle edge of nut or the edge, outer ring is processed with several axial notches or aperture, on spring washer, be processed with some bent elongated pin, the elongated pin of packing ring is penetrated or is welded direct in the axial notch or aperture of nut, make both be combined into one and can be directly used in scyewed joint and fastening, have the locking assembled nut of dual locking.

2, the locking assembled nut of dual locking according to claim 1, it is characterized in that on the tapped hole circle edge of nut or the edge, outer ring is processed with several axial notches or aperture, the section configuration of the elongated pin on the section configuration of groove or aperture and size and the spring washer and big or small corresponding makes the elongated pin of packing ring penetrate or to be welded in nut axial notch or the aperture.

3, the locking assembled nut of dual locking according to claim 1, it is characterized in that being processed with on the spring washer some the elongated pin that can bend, the quantity of the elongated pin on the packing ring and position are corresponding with axial notch or aperture on the nut, guarantee in the corresponding axial notch or aperture that penetrate or be welded on the nut of elongated pin energy of packing ring.

4, dual locking assembled nut according to claim 1, it is characterized in that the elongated pin of spring washer is penetrated or is welded in the axial notch or aperture of nut, between the two can be movable or integrally welded relatively, be combined into one and can be directly used in scyewed joint and fastening assembled nut.

5, dual locking assembled nut according to claim 1, it is characterized in that with assembled nut be inserted in tighten on the chek bolt after, spring washer generation resiliently deformable produces the surface friction drag locking nut, after the elongated pin of spring washer is passed in the axial notch of nut or the aperture, bending buckles into the radial groove or the interior locking of aperture of chek bolt bar end again, stop the possibility that pine changes between the nuts and bolt, realize the purpose that dual locking is locking, and when a certain locking function lost efficacy, another locking function works equally, thereby improves scyewed joint and fastening reliability.