CN2585726Y

CN2585726Y - Drill base without needing electrical drill key for fastening drill

Info

Publication number: CN2585726Y
Application number: CN 02290846
Authority: CN
Inventors: 唐兴元
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-10
Filing date: 2002-12-10
Publication date: 2003-11-12
Anticipated expiration: 2012-12-10

Abstract

The utility model relates to a drill bit seat without needing an electric drill key for fastening a drill bit, which is composed of a coniform inserting hole, a circular outer casing, a prismatic cone inserting hole, screw threads, a top cap, and a prismatic cone rod drill bit. Due to the adoption of the top cap with the screw threads for fastening the drill bit, and the cancellation of three blocks of sliding iron used for clamping the drill bit at the inner part, the disadvantages that a drill is provided with a key and the drill bit is fastened by the key are avoided. The utility model causes the structure of an electric drill to be simpler, the cost to be lower, and the processing to be easier. Because the outer edge angle surface of a prismatic cone rod arranged on the bottom of the drill bit is closely cooperated with the inner edge angle surface arranged in the prismatic cone inserting hole, a drill rod can not slide in the drill bit seat or separate from the drill bit seat when the drill bits drill holes.

Description

A kind of drill headstock of exempting from the fastening drill bit of electric drill key

Technical field

The utility model relates to a kind of drill headstock of exempting from the fastening drill bit of electric drill key, relates to the electric tool technical field.

Background technology

At present, the electric drill of the common use of people, its drill bit all are by using a kind of traditional electric drill key to screw three blocks of interior sliding iron of drill bit folder hole, reaching the purpose of clamping drilling rod.Its shortcoming, one, electric drill when rotating at a high speed, loosening phenomenon of skidding often appears in drill bit in drill jig, yet time-consuming effort again with the fastening drill bit of key the time, sometimes give a Workpiece boring, drill bit will fastening repeatedly several, and this drawback shows particularly outstanding on electric hand drill.Two, rely on the drill jig of the next fastening drill bit of electric drill key turn slide block, its complex structure, difficulty of processing is big, and the cost height is fragile, and every handle (platform) electric drill is also essential to be equipped with a key, even (platform) electric hand drill will be changed 2-3 drill jig.Three, the electric drill key is very easily lost, and make troubles for fastening drill bit, and key bit weares and teares easily.

Summary of the invention

The purpose of this utility model is achieved in that it, and bar drill is first-class forms by conical jack, circle overcoat, prismatic awl jack, screw thread, top cover, prismatic awl, the active axostylus axostyle of electric drill is inserted in the conical jack, its other end has prismatic awl jack, in the time of in drill bit shaft bottom prismatic wimble fraction inserts prismatic awl jack, two parts can close fit, tighten top cover, the fixed drill bit position.Because what the utility model adopted is the interior male and fomale(M﹠F) of prismatic awl jack and the corner angle face close fit of drill bit bottom, top cover is once tightening, just fixed the position of drill bit in drill headstock, so, both avoided that the drill bit key is easily lost, easy to wear, shortcoming that the drill jig difficulty of processing is big, simplified the structure of drill jig again greatly, drill bit can not skid in drill headstock yet simultaneously, more can from drill headstock, not deviate from, thereby made things convenient for the user, reduce the electric drill cost, improved fastening performance of drill bit and drilling efficiency.

Description of drawings

Fig. 1 is a cutaway view of the present utility model;

Shown in the figure, 1, conical jack, 2, the circle overcoat, 3, prismatic awl jack, 4, screw thread, 5, top cover, 6, prismatic awl rod bit.

The specific embodiment

Embodiment is described in further detail below in conjunction with (accompanying drawing): the prismatic wimble fraction of prismatic being bored rod bit (6) bottom inserts in the prismatic awl jack (3), use top cover (5) to rely on screw thread (4) that it is tightened then, the prismatic awl bar part of prismatic awl rod bit (6) bottom is closely cooperated, again with in the conical jack (1) in the active axostylus axostyle insertion circle overcoat (2) of electric drill with prismatic awl jack (3).

Claims

1, a kind of drill headstock of exempting from the fastening drill bit of electric drill key is made up of conical jack, circle overcoat, prismatic awl jack, screw thread, top cover, prismatic awl rod bit, and it is characterized in that: an end is provided with prismatic awl jack in the circle overcoat.

2, according to claims 1 described a kind of drill headstock of exempting from the fastening drill bit of electric drill key, it is characterized in that: the drill bit bottom is prismatic awl bar, inserts during use in the prismatic awl jack, is tightened with threaded top cover.