CN201086140Y

CN201086140Y - Fast pre-fastening drill chuck

Info

Publication number: CN201086140Y
Application number: CNU2007201846323U
Authority: CN
Inventors: 邱清盈; 王朝霞; 冯培恩; 张惠
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2007-10-16
Filing date: 2007-10-16
Publication date: 2008-07-16
Anticipated expiration: 2017-10-16

Abstract

The utility model discloses a rapid-pretension drill clamp which comprises a drill body, three clamping claws, screws, an axial hole provided at the back end of the drill body and connected with the driving shaft of a driver, axial holes provided at the front end of the drill body to store the handle part of a drill head. The three clamping claws are respectively arranged inside three equally-divided slant holes inside the drill body. The screws are engaged with the three clamping claws inside the slant holes. Three leaf springs are uniformly arranged inside the axial holes at the front end of the drill body and each is distributed at 60 degrees included angle to the central line of the three clamping claws respectively. The centers of the three leaf springs are positioned in the central axis of the axial holes. The front ends of the three leaf springs are in naturally closed state. When installing the drill head, the three leaf springs can rapidly pre-clamp the drill head. When releasing the drill head, the drill head doesn't fall. The utility model has the advantages of easy operation, safe use and simple structure, and is suitable for the clamping of various tools.

Description

A kind of drill chuck of rapid pretension

Technical field

The utility model relates to clamping device, especially relates to a kind of drill chuck of rapid pretension.

Background technology

In the prior art, drill chuck mainly is made up of drill body, screw, jaw, protheca, back cover etc.When clamp operation, need hold drill bit with one, the guiding drill bit is put into drill body front end axial hole, the another hand-screw changes drill chuck protheca outer surface or spanner drives the screw rotation, moves down jaw, just can unclamp the hand of holding drill bit after jaw is run into the drill bit outer surface and applied certain force, when bit size less, when jaw displacement was big, the operator needed the long period to grip drill bit with hand, and is very inconvenient.When unclamping drill bit, with hand reverse rotation drill chuck protheca or spanner, when moment acquires a certain degree, drive the screw backward rotation, the jaw that moves up makes jaw break away from bit face, in the drill bit release process, if the untimely drill bit that grasps very easily makes drill bit fall on the ground or on the workpiece, causes danger and damage.

Summary of the invention

The purpose of this utility model is exactly in order to overcome above-mentioned the deficiencies in the prior art, provides rational in infrastructure, has the rapid pretension function, and is easy to operate, the drill chuck of a kind of rapid pretension safe in utilization.

For achieving the above object, the technical solution adopted in the utility model is as follows:

Comprise drill body, three jaws and screw, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, front end is provided with the axial hole of placing drill handle part, and three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and three jaw engagements that are installed in the drill body inclined hole.Three reeds evenly have been installed in the drill body front end axial hole, and to differ 60 degree spaced apart with three jaw center lines respectively for three reeds, three reeds be centered close to the axial hole central axis, the front end of three reeds is the nature closed form.

Be provided with sleeve in the described drill body front end axial hole, sleeve is fixedlyed connected with axial hole, and three reeds are fixed on barrel forward end, perhaps are fabricated to integral body with sleeve.

The beneficial effect that the utlity model has is:

When drill bit is installed, can pass through three reed rapid pretension drill bits; When pine was unloaded drill bit, drill bit can not come off automatically, have easy to operate, safe in utilization, advantages of simple structure and simple, the utility model also is applicable to the clamping of various tool.

Description of drawings

Fig. 1 is the structural principle schematic diagram of the utility model drill chuck.

Fig. 2 is an A-A profile among Fig. 1.

Fig. 3 is the structural front view of cutting ferrule.

Fig. 4 is the structure vertical view of Fig. 3 cutting ferrule.

Among the figure: 1, drill body, 2, back cover, 3, protheca, 4, jaw, 5, rolling element, 6, sleeve, 7, reed, 8, screw, 9, nut sleeve, 10, protecgulum, 11, drill bit.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1 and Figure 2, the utility model comprises that drill body 1 rear end is provided with the axial hole that engages with the driving shaft of driven tool, front end is provided with the axial hole of placing drill bit 11 shanks, three jaws 4 are installed in respectively in the inclined hole of three five equilibriums in the drill body 1, screw 8 and three jaws, 4 engagements that are installed in drill body 1 inclined hole; Rolling element 5 is between screw and drill body, and nut sleeve 9 is fixed as integral body with screw 8, with protheca 3 interference fit, interference fit is adopted with back cover 2 in drill body 1 rear end, be provided with protecgulum 10 on drill body 1 front end workpiece hole top, protecgulum 10 and drill body 1 tight fit are in order to axial location protheca 3.Evenly arranged three reeds 7 in the drill body 1 front end axial hole, spaced apart with three jaws 4, three reeds 7 be centered close to the axial hole central axis, as shown in Figure 3, Figure 4, three reed 7 front ends are the nature closure state.Be provided with sleeve 6 in the drill body 1 front end axial hole, sleeve 6 cylindricals and axial hole inwall interference fit, three reeds are that the center evenly is fixed on sleeve 6 front ends with the axis, also can be fabricated to integral body with sleeve 6.

During the utility model work, at first grasp drill bit 11 and put into drill body 1 front end axial hole, by upwards strutting three reeds 7 with hand-power, reed 7 relies on elastic force to clamp drill bit 11 shanks, and the rapid pretension drill bit is as Fig. 1, can unclamp the hand of holding drill bit 11 this moment, rotate protheca 3 then by hand, drive screw 8 and rotate, move down jaw 4 and further accurately locate and clamp drill bit 11.When unclamping drill bit 11, by hand reverse rotation protheca 3, drive screw 8 backward rotation, the jaw 4 that moves up when jaw 4 breaks away from drill bit 11 shanks surface, takes off drill bit 11 with hand.

Claims

1. the drill chuck of a rapid pretension, comprise drill body (1), three jaws (4) and screw (8), drill body (1) rear end is provided with the axial hole that engages with the driving shaft of driven tool, front end is provided with the axial hole of placing drill handle part, three jaws (4) are installed in respectively in the inclined hole of three five equilibriums in the drill body (1), screw (8) and three jaws (4) engagement that is installed in drill body (1) inclined hole; It is characterized in that: in drill body (1) the front end axial hole three reeds (7) have been installed evenly, three reeds (7) respectively with three jaws (4) center line differ 60 the degree spaced apart, three reeds (7) be centered close to the axial hole central axis, the front end of three reeds (7) is the nature closed form.

2. the drill chuck of a kind of rapid pretension according to claim 1, it is characterized in that being: be provided with sleeve (6) in described drill body (1) the front end axial hole, sleeve (6) is fixedlyed connected with axial hole, and three reeds (7) are fixed on sleeve (6) front end, perhaps is fabricated to integral body with sleeve (6).