CN2363113Y

CN2363113Y - Demounting-resistant nut, screw bolt and special clamp nut

Info

Publication number: CN2363113Y
Application number: CN 97236642
Authority: CN
Inventors: 李刚; 李铁
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-24
Filing date: 1997-07-24
Publication date: 2000-02-09
Anticipated expiration: 2007-07-24

Abstract

The utility model relates to an anti-disassembling nut, a screw bolt, and a special fastening nut, belonging to the technical field of fasteners in the class of machinery foundation products. The problem that in order to prevent machinery and equipment from being stolen and disassembled at present, a fastening device is too complicated and is difficult for manufacture, is solved. The anti-disassembling nut and the screw bolt head of the screw bolt are both cones. The end surfaces of small heads of the cones are oblique tooth shapes which are divided into six parts equally. The special fastening nut is hexagon. One end surface is also the oblique tooth shape which is divided into six parts equally. When the anti-disassembling nut, a screw bolt, and a special fastening nut are arranged, the end surface of the oblique tooth shape which is divided into six parts equally of the special fastening nut is inosculated with the end surface of the oblique tooth shape which is divided into six parts equally of the anti-disassembling nut or the screw bolt head so as to become a whole. The special fastening nut is disassembled after rotated by a spanner in place. The fastening effect of the special fastening nut is good.

Description

Anti-disassembling nut, bolt and special-purpose tightening nut

The utility model belongs to machine foundation product class technical field of fastening.

Known to the claimant, at present the employing spring that has of anti-theft fastening piece withstands pin, and it is fixing preventing dismounting to be stuck in bolt, screw thread or indentation, there, or locks fixing with key from the nuts and bolt junction; These structure image locks are equally complicated, and manufacturing procedure is many, the assembly manipulation difficulty, and stock utilization is low, the cost height.It is 95239306.9 rated torque anti-disassembling nut that a kind of patent No. is arranged, and it is at one a hexagon nut to be arranged above the cone, and there is a groove centre, firmly top hexagon head is twisted off during use and throws away, and Lower Half is kept fixing anti-dismounting.The shortcoming of its maximum is that median slot will guarantee to twist off, and the sectional area size requirement is very strict.The internal component of every stove steel all has fluctuation during steel-making, and adding man-hour steel has hot rolling, cold rolling, Steel Rolling number of times difference, and hardness and twisting resistance are also inequality; Both made the notch size tally in every detail, it twists off power and also can fluctuate in a bigger scope.Therefore add and be difficult to man-hour grasp.If raw material are all heat-treated before making product, must strengthen cost like this.This kind rated torque anti-disassembling nut is because differences in shape is bigger up and down, and the centre has notch again in addition, and difficulty of processing is very big, can not automatic continuous production.

The purpose of this utility model is that to make a kind of simple, anti-dismounting effective, can single forming, produce anti-disassembling nut that saves material and bolt and special-purpose tightening nut continuously.

The utility model is like this design: it by anti-disassembling nut, anti-demounting bolt, and three parts of special-purpose tightening nut form.The bolt head of anti-disassembling nut and anti-demounting bolt is cone, and cone microcephaly's end face is six five equilibrium helical teeth shapes; Special-purpose tightening nut is a hexagon, and an one end face also is six five equilibrium helical teeth shapes.During installation, six five equilibrium pitch faces of special-purpose tightening nut and six five equilibrium pitch faces of anti-disassembling nut or bolt head coincide, and screw with spanner, after putting in place, special-purpose tightening nut are taken off, and nuts and bolt just is difficult to dismantle.

Special-purpose tightening nut can use repeatedly.When needing, special-purpose tightening nut also can be installed a handle, becomes special-purpose spanner, and is more convenient when using like this.

The utility model has the advantages that: simple shape, reliability height.Littler than existing standard hex nut amount of deformation, thus the compressive strain ratio reduced, reduced the press forming tonnage.As long as change mold shape slightly, the multi-locating automatic cold forging machine single forming of promptly available production common standard fastening piece is produced continuously.Adopt few anti-disassembling nut stock utilization of not having the cutting cold upset forming to reach about 80%.The stock utilization of producing anti-demolition bolt can reach about 95 percent.Can mechanization produce in enormous quantities continuously, cost greatly reduces.

The contrast accompanying drawing is illustrated for an embodiment below.

Fig. 1 is the anti-disassembling nut generalized section.

Fig. 2 is the anti-demounting bolt schematic side view.

Fig. 3 is special-purpose tightening nut schematic perspective view.

Fig. 4 is the identical schematic representation of special-purpose tightening nut and anti-disassembling nut.

Fig. 5 is the identical schematic representation of special-purpose tightening nut and anti-demounting bolt.

Among the figure: 1. 3. special uses of anti-disassembling nut 2. anti-demounting bolts are tightening nuts

Fig. 1, Fig. 2, Fig. 3 are three assembly parties of the present utility model.

Can find out that from Fig. 1, Fig. 2 the head of anti-disassembling nut and bolt is cone, the cone microcephaly is six five equilibrium helical teeth shapes.

As can be seen from Figure 3, special-purpose tightening nut is a hexagon, and an one end face also is six five equilibrium helical teeth shapes, and it is corresponding with six five equilibrium inclined-plane teeth on anti-demolition nut and the anti-demolition bolt.

Can find out that from Fig. 4, Fig. 5 during with the fastening anti-disassembling nut of specialized nut and bolt, both coincide mutually, both sides' crown just in time stretches into the other side's tooth root, indenting is bited into an integral body.When rotating special-purpose tightening nut, drive anti-disassembling nut at an easy rate and bolt rotates together with spanner.And can only screw forward, can not unscrew backward.Because during opposite spin, the helical teeth on two sides just skids mutually.After putting in place, special-purpose tightening nut is taken off.Anti-disassembling nut and anti-demounting bolt have just pinned fastener tightly.

Because the bodily form of anti-disassembling nut and anti-demounting bolt all is a cone, all can't tightens with spanner and pipe wrench, thereby just reach the purpose of anti-dismounting.

It can also be seen that from Fig. 4, Fig. 5 the aperture greater than anti-disassembling nut and anti-demounting bolt should be sold in the aperture of special-purpose tightening nut.Be convenient to fastening screw like this.Long bolt adds man-hour, heat-treat, and anti-dismounting effect of the present utility model and working life can be better, longer.

Special-purpose tightening nut in the utility model also can add a handle in addition, makes special-purpose spanner, will be more convenient when a large amount of installation exercise.

Claims

1, anti-disassembling nut, bolt and special-purpose tightening nut, it is characterized in that: the bolt head of anti-disassembling nut and bolt is cone, and cone microcephaly's end face is six five equilibrium helical teeth shapes, and special-purpose tightening nut is a hexagon, and an one end face also is six five equilibrium helical teeth shapes; During installation, six five equilibrium helical teeth shape end faces of six five equilibrium helical teeth shape end faces of special-purpose tightening nut and anti-disassembling nut or bolt head coincide, and become as a whole, with the spanner rotation, after putting in place, special-purpose tightening nut are taken off.