CN2221679Y

CN2221679Y - Rust and corrosion preventing inner hexagonal screw

Info

Publication number: CN2221679Y
Application number: CN 95208405
Authority: CN
Inventors: 陈家隆
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-31
Filing date: 1995-03-31
Publication date: 1996-03-06
Anticipated expiration: 2005-03-31

Abstract

The utility model discloses a rust and corrosion preventing inner hexagonal screw, which comprises a body and a rust and corrosion preventing cap; the body has a spiral head and a spiral body; the shape of the cap is accommodated with the spiral head and the cap is cooperated to be nested on the spiral head, and the cap and the spiral head are tightly combined into integration; the top faces of the cap and the spiral head are integrally formed into a cupped inner hexagon spanner hole, thereby, the rust and corrosion preventing inner hexagonal screw can be easily dismounted, and the service life of the rust and corrosion preventing inner hexagonal screw is increased.

Description

But the hexagon socket head cap screw of anti-corrosion

But the utility model relates to a kind of hexagon socket head cap screw of anti-corrosion, the cap of an anti-corrosion but it is combined closely on the spiral shell head of hexagon socket head cap screw, thus increase its working life.

The winding of at present general object and object, be used as compound mode with widely generally employing of people institute with its utilization screw, wherein, it is a lot of in conjunction with the person to be also must to rely on screw in the part combination of bicycle, and traditional hexagon socket head cap screw 1 is (as Fig. 1, shown in the 1A), it is made up of a spiral shell head 11 and a spiral shell body 12, directly make the blank body of this spiral shell head 11 and spiral shell body 12 in the cold forging mode, and the rim surface of its spiral shell head 11 directly make and produce one the depression Allen wrench hole 13, spiral shell body 12 parts then treat to make screw tooth end in the future, to make a hexagon socket head cap screw 1, yet, after being used as combining of article and article with screw, its because of the screw of spiral shell after solid usually in its spiral shell head 11 parts because of being exposed to for a long time in the air, be easy to oxidation, more can more will post driving hole 13 positions in spiral shell head 11 rim surface of screw 1 have been invaded (rust) erosion because of the rainy acid rain phenomenon that causes; When disassembling in the driving hole 13 of the spiral shell head 11 of desiring to be placed in oxidated and corrosion and with screw 1 with hexagon wrench, driving hole 13 places of its spiral shell head 11 phenomenon of then can bursting apart, and make screw removal smoothly, and the generation dilemma, and making us producing security concerns aspect the safety of structure in fact for whole article, directly threaten the safety of people's life, full road with its improvement of providing food for thought.

In view of this, but the purpose of this utility model is to provide a kind of hexagon socket head cap screw of anti-corrosion, the cap of an anti-corrosion but it is combined closely on the spiral shell head of hexagon socket head cap screw, thus make its easy removal, and increase its working life.

For achieving the above object, but the hexagon socket head cap screw of the anti-corrosion that the utility model provides comprises the cap of a body and an anti-corrosion; This body has spiral shell head and spiral shell body, and the shape of this cap adapts with the spiral shell head and cooperates and is nested on this spiral shell head, and closely is combined as a whole with it; The one-body molded inner hexagon spanner hole that a depression is arranged on the end face of this cap and spiral shell head.

The body of this screw is that metal material is made, make and cap is the material with anti-corrosion, and the spiral shell head of this body and cap is after the die stamping moulding, and both are, and to combine closely be one, and can not produce obscission.

Now again with regard to structure characteristic of the present utility model etc., the mode of conjunction with figs. explanation, detailed row record and narrate in after.

Fig. 1,1A: for practising the stereogram and the structure sectional view of formula structure.

Fig. 2,2A: be the stereogram and the structure sectional view thereof of ready-made blank body of the utility model and cap.

Fig. 3: be the first step embodiment schematic representation of the utility model when making.

Fig. 4: be the second step embodiment schematic representation of the utility model when making.

Fig. 5: be the third step embodiment schematic representation of the utility model when making.

Fig. 6: be structure sectional view of the present utility model.

See also shown in each accompanying drawing, the utility model utilizes a hexagon socket head cap screw blank body 2 via cold-forge forming, this body 2 is made up of spiral shell head 21 and spiral shell body 22, and the end face of this spiral shell head 21 is made plane (shown in Fig. 2,2A), but the metal cap 3 of an anti-corrosion is made to cooperate and is inserted on spiral shell head 21; One mould 5 is made predetermined size dimension, when producing, then this body 2 firmly is placed on the master mold 51 of mould 5, and make simultaneously this cap 3 can with spiral shell head 21 fit mutually, afterwards via male model 52 and master mold 51 matched moulds punching presses, and by the hexagonal on the male model 52 towards body 53, make the inner hexagon spanner hole 23 of the integrally formed depression of these spiral shell head 21 end faces, and this spiral shell head 21 is tight shape with 3 of caps and is combined as a whole, spiral shell body 22 parts are then treated to make screw tooth end in the future and are formed a screw finished product, thereby prevent that spiral shell head 21 is because of suffering corrosion and cause puzzlement that can't the removal screw and can increase the working life of screw.

Claims

But a kind of hexagon socket head cap screw of anti-corrosion is characterized in that comprising the cap of a body and an anti-corrosion; This body has spiral shell head and spiral shell body, and the shape of this cap adapts with the spiral shell head and cooperates and is nested on this spiral shell head, and closely is combined as a whole with it; The one-body molded inner hexagon spanner hole that a depression is arranged on the end face of this cap and spiral shell head.