CN2875740Y

CN2875740Y - Ball handle awl

Info

Publication number: CN2875740Y
Application number: CN 200620101974
Authority: CN
Inventors: 徐云根
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-24
Filing date: 2006-03-24
Publication date: 2007-03-07
Anticipated expiration: 2016-03-24

Abstract

The utility model provides a ball handle awl consisting of an awl haft and an awl, the awl including a screw stem (4) which splits and has the bottom end with a round table (4.1) and a pipe sleeve (5) coupling with the round table, the upper end of the screw stem (4) fitting the awl haft thread, the awl haft being hollow and ball-headed shape, and composed of interference fit locking of the opposite terrace provided with a semi-spherical cap (1) and a handle seat (2); the top in the semi-spherical cap (1) is provided with a nut body (1.1) matched with the screw thread of the upper end of the screw stem (4). The utility model is convenient to be produced and reduces the manufacturing cost.

Description

A kind of ball handle bradawl

Technical field:

The utility model relates to a kind of instrument of hand drill, particularly such as the used bradawl of cobbler.

Background technology:

Traditional bradawl, by the copper taper shank and can clamping the copper cone of awl forms, the screw rod that cone comprises distinguish and has a truncated cone-shaped bottom reaches the pipe box that cooperates with round table surface, taper shank is the hollow ball head, the lower end is shaped on the screw that cooperates with screw flight.When casting hollow ball nose cone handle, need in the bulb cavity, to preset fine sand class filler, again fine sand slowly to be turned from reserving in the through hole of making screw after the moulding, work efficiency is low, the cost height.The applicant once designed the bulb taper shank of split screw connection structure, and can avoid presetting fine sand and fill the low problem of the work efficiency of being brought, but the inevitable requirement wall thickness increase that is threaded, and the copper high price is expensive now, still has expensive problem; Be threaded in addition and also have the problem that gets loose unintentionally.

Summary of the invention:

The purpose of this utility model provides a kind of easy to make, ball handle bradawl bradawl that cost is low.

The utility model is made up of taper shank and cone, cone comprises distinguish and has the screw rod of round table surface bottom and the pipe box that cooperates with this round table surface, screw rod upper end and taper shank threaded engagement, taper shank is the hollow ball head, it is characterized in that this taper shank is made of the interference fit of the step in opposite directions fastening that hemisphere cover and handle seat are shaped on.

The hemisphere cover inner roof can be shaped on and screw rod upper end screw thread nut engaged body.

Above-mentioned pipe box is threaded by last sleeve pipe and setting of casing and constitutes, or is made of the interference fit of the step in opposite directions fastening that last sleeve pipe and setting of casing was shaped on.

The utility model makes original taper shank that is threaded into be shaped on by hemisphere cover and handle seat the interference fit of step in opposite directions and fastens and constitute, and wall thickness can attenuate; Material cost can be reduced, will hemisphere cover and possible the getting loose of handle seat can be prevented in the hemisphere cover inner roof with screw thread nut engaged system on the screw rod; To be threaded by last sleeve pipe and setting of casing constitutes pipe box, can adopt machined into and need not in the past cast operation, reduces production costs.

Description of drawings:

Fig. 1 is the utility model example structure schematic diagram.

Fig. 2 is another example structure schematic diagram.

Fig. 3 is the enlarged drawing of looking up of Fig. 1.

The specific embodiment:

With reference to Fig. 1, hemisphere cover 1 and handle seat 2 respectively are shaped on the step of concavo-convex cooperation in opposite directions, and both are fastened and connected into the hollow taper shank by interference pressure, make both strong bonded., can not separate just in case both break away from voluntarily, and the inner roof that original nut body 1.1 built in handle seat 2 is formed on hemisphere cover 1 is threaded with screw rod 4 for preventing even hemisphere cover 1 becomes flexible with handle seat 2 junction A yet.

With reference to Fig. 2, because cast cost height, pipe box 5 changes the interference fit of the step in opposite directions pressure fastening that is shaped on by last sleeve pipe 5.1 and setting of casing 5.2 and constitutes, or be threaded by last sleeve pipe 5.1 and setting of casing 5.2 and constitute, all can directly be processed by lathe, B is last sleeve pipe 5.1 and setting of casing 5.2 junctions among the figure.The distinguish round platform with round table surface 4.1 is made in screw rod 4 bottoms, and the lobe center is folder pin hole 6, as shown in Figure 3; Setting of casing 5.2 bottom diameters are less than screw rod 4 bottom external diameters.Handle seat 2 centers are shaped on nut body 2.1.During installation, at first hemisphere cover 1 and handle seat 2 are fastened in opposite directions with press, the concave surface of handle seat 2 is stretched in pipe box 5 upper ends, again screw rod 4 is penetrated from pipe box 5 bottoms and screw with nut body 2.1 or 1.1, can be by the round platform ramp effect with the awl firm grip in the folder pin hole 6.Mark 3 is a spring washer.

Claims

1, a kind of ball handle bradawl, form by taper shank and cone, cone comprises distinguish and has the screw rod (4) of round table surface (4.1) bottom and the pipe box (5) that cooperates with this round table surface, screw rod (4) upper end and taper shank threaded engagement, taper shank is the hollow ball head, it is characterized in that this taper shank fastens formation by the interference fit of step in opposite directions that hemisphere cover (1) and handle seat (2) are shaped on.

2, ball handle bradawl according to claim 1 is characterized in that hemisphere cover (1) inner roof is shaped on and screw rod (4) upper end screw thread nut engaged body (1.1).

3, ball handle bradawl according to claim 1 is characterized in that pipe box (5) is by last sleeve pipe (5.1) and setting of casing (5.2) formation that is threaded.

4, ball handle bradawl according to claim 1 is characterized in that pipe box (5) fastens formation by the interference fit of step in opposite directions that last sleeve pipe (5.1) and setting of casing (5.2) are shaped on.