CN2818889Y

CN2818889Y - Anti-loosening bolt sleeve member

Info

Publication number: CN2818889Y
Application number: CN 200520051318
Authority: CN
Inventors: 谭智远
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-08
Filing date: 2005-07-08
Publication date: 2006-09-20
Anticipated expiration: 2015-07-08

Abstract

An anti-loosening bolt sleeve member is formed by connecting a bolt, a fastening nut, an anti-loosening nut, a chuck and a spring, wherein the fastening nut and the anti-loosening nut are respectively connected to two screw thread groups which are opposite to each other, while the spring and the chuck are respectively covered on a chuck loop bar which presents non-circular bar shape at one end of the fastening nut. The chuck is meshed with the anti-loosening nut by zigzag skewed teeth. The utility model is like present bolt and nut assembly that can be fixedly connected to required fastening element, so keeps the advantage that the present bolt and nut assembly are used as a fasten part. After fastened, the bolt and the fastening nut do not get loose even the working parts under vibration environment for a long time, except on artificial loosing. Thus, the member ensures normal operation of equipment and workpiece, avoids eventual accident and ensures safe operation of production and work.

Description

The chek bolt external member

Technical field

The utility model relates to a kind of securing means that adopts screw thread, specifically, relates to a kind of chek bolt external member of getting loose between the bolts and nuts of preventing.

Background technique

As everyone knows, the bolt and nut external member is a kind of fastenings commonly used, but the shortcoming of common bolt and nut external member is, when its place parts or equipment are in when working under the vibration environment for a long time, just be easy to generate between the bolts and nuts and get loose, thereby the proper functioning of equipment is affected, even also causes security incident.In order to address this problem, though also in known designs with install some measures of having taked, but still the situation that can not avoid bolt to get loose fully takes place.

Summary of the invention

Automatically produce the problem that gets loose between the bolts and nuts that existing bolt and nut external member exists easily in order to solve, the purpose of this utility model, though be provide a kind of be under the long-term vibration environment also can be fastening as usual and chek bolt external member that can not take place to get loose automatically.

Solution of the present utility model is as follows.It still has a bolt and a tightening nut, and its feature part structurally is, bar portion at bolt is processed with two groups of opposite each other screw threads of hand of spiral, tightening nut be screwed in by bolt head one side this group screw thread on, on another group screw thread, then be connected with a lock nut by bolt tail one side, by be processed with on lock nut one side's tightening nut one end one section bore less be non-circular shaft-like chuck loop bar, suitable ground sliding sleeve has one can move axially but not rotatable chuck last on this section chuck loop bar, go back on the inboard side's of chuck the chuck loop bar sliding sleeve have one with the chuck inner side surface spring of apical grafting mutually, the lateral part of chuck is processed with the saw shape helical teeth that a circle radial distributes, the inside portion of lock nut be processed with that a circle radial distributes and with the saw shape helical teeth of the suitable engagement of saw shape helical teeth of chuck lateral part.

The utility model with said structure is when installing and using, its bolt is passed the corresponding screw that needs fixed component, tighten with tightening nut earlier and need fixed component, then its spring and chuck are passed bolt tail successively and be socketed on the chuck loop bar of tightening nut outer end, again lock nut is screwed in bolt tail, make the saw shape helical teeth of lock nut be meshed with the saw shape helical teeth of chuck, and it is tight to be fitted in the exterior edge face of the interior edge face of lock nut and tightening nut, thereby tightening nut is compressed.If the tightening nut place uses is plus thread and the lock nut place uses is left-hand thread, then externally take place under the vibration environment improper when loosening when tightening nut, it will produce counterclockwise and rotate, can not relatively rotate owing to can only move to axial between chuck and the tightening nut, therefore rotating counterclockwise of tightening nut also rotates counterclockwise the drive chuck, and then the lock nut that is meshed by the drive of the saw shape helical teeth on the chuck also rotates counterclockwise, but because the lock nut place uses is left-hand thread, what therefore lock nut produced at this moment rotates counterclockwise, its effect can only be further to compress tightening nut, and according to as can be known aforementioned, lock nut has compressed tightening nut when mounted, so final effect is that tightening nut can't be become flexible.

The beneficial effects of the utility model are, it had both kept the advantage of existing bolt and nut external member as fastenings, simultaneously again after bolton, if not the people for unscrewing, even workpiece is under the vibration environment for a long time, also can never get loose automatically between bolt and the tightening nut, therefore can guarantee the proper functioning of equipment of living in and workpiece, stop contingent accident, guarantee to produce and the safety of working is carried out.

Description of drawings

Fig. 1 and Fig. 2 are respectively the front view and the right elevation of a kind of concrete structure of the present utility model;

Fig. 3 is Fig. 1 forward partial sectional view of the present utility model;

Fig. 4 and Fig. 5 are respectively A-A and the B-B sectional view of Fig. 3;

Fig. 6 changes into the shaft-like embodiment of incomplete ellipse for the chuck loop bar on the tightening nut of the present utility model by the shaft-like embodiment of Hexagon among Fig. 5.

Embodiment

Referring to Fig. 1 to Fig. 6.The utlity model has bolt 1 and tightening nut 2, bar portion at bolt 1 is processed with two groups of opposite each other screw threads of hand of spiral, tightening nut 2 be screwed in by bolt 1 head one side this group screw thread on, on another group screw thread, then be connected with a lock nut 3 by bolt 1 afterbody one side, by be processed with on lock nut 3 one sides' tightening nut 2 one ends one section bore less be non-circular shaft-like chuck loop bar 21, suitable ground sliding sleeve has one can move axially but not rotatable chuck 4 last on this chuck loop bar 21, go back on chuck 4 an inboard sides' the chuck loop bar 21 sliding sleeve have one with the inner side surface of chuck 4 spring 5 of apical grafting mutually, the lateral part of chuck 4 is processed with the saw shape helical teeth 41 that a circle radial distributes, the inside portion of lock nut 3 be processed with that a circle radial distributes and with the saw shape helical teeth 31 of the saw shape helical teeth 41 suitable engagements of chuck 4 lateral parts.

Referring to Fig. 5, the processing of described tightening nut 2 one ends be non-circular shaft-like chuck loop bar 21, embodiment is that to be processed into Hexagon shaft-like in the drawings, obvious like this can reaching can move axially chuck 4 but purpose in relative rotation not on chuck loop bar 21.Referring to Fig. 6, in this embodiment,, equally also can reach chuck 4 to be moved axially but rotatable purpose on chuck loop bar 21 when chuck loop bar 21 is processed into as shown in the figure incomplete ellipse when shaft-like.Certainly, also can enumerate numerous embodiments and reach above-mentioned same purpose.

The utility model prevents to produce between bolt 1 and the tightening nut 2 principle that gets loose and repeats as described above and no longer.And as will unclamp the parts of being fixed the time, only need earlier chuck 4 to be pressed towards the cephalad direction of bolt 1 with spanner, the saw shape helical teeth 41 and the saw shape helical teeth on the lock nut 3 31 of chuck 4 are broken away from,, then back out tightening nut 2 again keeping backing out lock nut 3 under the situation about breaking away from.

Claims

1, a kind of chek bolt external member, have a bolt and a tightening nut, it is characterized in that, bar portion at bolt is processed with two groups of opposite each other screw threads of hand of spiral, tightening nut be screwed in by bolt head one side this group screw thread on, on another group screw thread, then be connected with a lock nut by bolt tail one side, by be processed with on lock nut one side's tightening nut one end one section bore less be non-circular shaft-like chuck loop bar, suitable ground sliding sleeve has one can move axially but not rotatable chuck last on this section chuck loop bar, go back on the inboard side's of chuck the chuck loop bar sliding sleeve have one with the chuck inner side surface spring of apical grafting mutually, the lateral part of chuck is processed with the saw shape helical teeth that a circle radial distributes, the inside portion of lock nut be processed with that a circle radial distributes and with the saw shape helical teeth of the suitable engagement of saw shape helical teeth of chuck lateral part.