CN2283055Y

CN2283055Y - Bar bit

Info

Publication number: CN2283055Y
Application number: CN 96216764
Authority: CN
Inventors: 张锡漳
Original assignee: MAOXIN XIAMEN INDUSTRY Co Ltd
Current assignee: MAOXIN XIAMEN INDUSTRY Co Ltd
Priority date: 1996-07-05
Filing date: 1996-07-05
Publication date: 1998-06-03
Anticipated expiration: 2006-07-05

Abstract

The utility model discloses a bar bit. The utility model is mainly composed of two cast steel pipes, a connection device between the cast steel pipes and a plastic layer covered at the outer part, wherein the middle part of the cast steel pipe is integrally extended with a cylinder with a radian; a through hole and a small hole are arranged on the cylinder, and the through hole and the small hole are convenient for the welding to the connection device; the utility model has excellent fastness, and particularly, the cylinder has a supporting force function to the connection device; during the injection molding time, the strong impact force emitted plastic melt liquid leads the connection device not easy to be deformed, and thus, the plastic layer has uniform thickness; the utility model has high yield, and the safety in use is more strengthened.

Description

A kind of bar bit

The utility model relates to a kind of structure of bar bit.

By the corrosion-resistant steel steel wire rope of a suitable length, its two ends are welded with two segment iron pipes to common bar bit mostly, form long " I " type structure, coat one deck plastic layer by plastic injection-moulded technology in its appearance then, form certain shape.Because welding wire rope technology difficulty is big on iron pipe, and be difficult for welding, therefore can not on iron pipe, act on a bigger power and make steel wire rope be in tight state, when injection machine with the plastics of fusing when injecting mould because powerful application force makes steel wire rope be in deformation state, the plastic layer of the outer like this coating became uneven that can seem, steel wire rope can be given prominence to outside the plastic layer during use, thereby cause injury, so reject rate is high, thereby has strengthened the cost of product horses.

The purpose of this utility model is to provide a kind of bar bit, this structure rate of can reducing the number of rejects and seconds, and suitable radian can bring comfort to horse.

Cause above-mentioned purpose in order to reach, the utility model is by two cast-steel pipes, a corrosion-resistant steel steel wire rope and the outer plastic layer that covers constitute, wherein cast-steel pipe is a "T"-shaped pipe, two ends respectively form a terrace that is slightly less than external diameter of pipe, a cylinder is extended with a suitable radian one in middle part at pipe, which is provided with through hole, establishing an aperture on end face communicates with through hole, be provided with a circular groove with aperture opposed inside wall in the through hole, steel wire rope is penetrated in the through hole by aperture, and insert groove and fixed, with welding manner that steel wire rope and cast-steel pipe is affixed then, steel wire rope and two cast-steel pipes form long " I " shape structure like this, it is inserted in the mould of a suitable shape, by the injection moulding mode bar bit that is shaped.

Above purpose also can be reached like this, with two mutual sockets of connecting rod that have annulus, and make it that annulus is closed after socket, end with connecting rod welds with cast-steel pipe respectively then, except the connecting rod socket part, all the other are still outer covers a plastic layer, constitutes certain moulding and the connecting rod socket part can movable bar bit.

In addition, the size of cast-steel pipe pipe can determine that its extended cylindrical radian in middle part also can be determined by the radian of bar bit institute tool according to the width at bar bit two ends.

After adopting said structure, owing to extend the cylinder of the suitable radian of a tool on the cast-steel pipe, made things convenient for welding with steel wire rope or connecting rod etc., and fastness is fabulous, especially for this yielding steel wire rope, when injection moulding, the extremely strong impact force action of the plastics liquation that ejects is thereon the time, because the circular columns of tool radian has a top power effect to steel wire rope, makes steel wire rope not yielding, thereby has reduced the reject rate of product.

Below in conjunction with embodiment and accompanying drawing the utility model is done a detailed explanation.

Fig. 1 is stereoscopic figure of the present utility model;

Fig. 2 is an inner structure exploded drawings of the present utility model;

Fig. 3 is the stereoscopic figure of another embodiment of the present utility model;

Fig. 4 is the inner structure exploded drawings of another embodiment of the present utility model.

Consult Fig. 1, Fig. 2, the utility model is by cast-steel pipe 2, the plastic layer 1 of corrosion-resistant steel steel wire rope 3 and the outer certain profile of tool that coats thereof is formed, wherein cast-steel pipe 1 is a "T"-shaped pipe, its mouth of pipe 22 two ends respectively form a terrace 21 that is slightly less than external diameter of pipe, a cylinder 23 is extended with a suitable radian one in the middle part of pipe, which is provided with through hole 24, establishing an aperture 25 on end face communicates with through hole 24, be provided with a circular groove 26 with aperture 25 opposed inside walls in the through hole 24, steel wire rope 3 is penetrated in the through hole 24 by aperture 25, and insert groove 26 and fixed, with welding manner that steel wire rope 3 and cast-steel pipe 2 is affixed then, steel wire rope 3 and two cast-steel pipes 2 form long " I " shape structure like this, it is inserted in the mould of a suitable shape, by the injection moulding mode bar bit that can be shaped.

In another embodiment, consult Fig. 3, Fig. 4, connecting rod 5 mutual sockets with a band annulus 51, and make it after socket, 51 one-tenth closeds of annulus, the end with connecting rod 5 welds with cast-steel pipe 2 respectively then, except the socket part of connecting rod 5, all the other still outer plastic layers 1 that cover, the socket part of its connecting rod 5 can be movable.

In addition, the pipe range size of cast-steel pipe 2 is determined that by the width at bar bit two ends the radian of its extended cylinder 23 in middle part can be by the radian decision of the required shaping of bar bit.

Claims

1, a kind of bar bit, mainly by two cast-steel pipes, hookup mechanism between the cast-steel pipe and the outer plastic layer that covers are formed, it is characterized in that: cast-steel pipe is a "T"-shaped pipe, two ends respectively form a terrace that is slightly less than external diameter of pipe, extend a cylinder at the middle part of pipe with a suitable radian one, which is provided with through hole, on end face, establish an aperture and communicate, be provided with a circular groove with aperture opposed inside wall in the through hole with through hole.

2, a kind of bar bit according to claim 1 is characterized in that: the hookup mechanism between this cast-steel pipe is the corrosion-resistant steel steel wire rope.

3, a kind of bar bit according to claim 1 is characterized in that: the hookup mechanism between this cast-steel pipe is made up of the connecting rod that has annulus of two mutual sockets, and its annulus is closed.