CN2084858U

CN2084858U - Drill bit chuck integrated with fastening device

Info

Publication number: CN2084858U
Application number: CN 90226425
Authority: CN
Inventors: 李云生
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-18
Filing date: 1990-12-18
Publication date: 1991-09-18

Abstract

AThe utility model relates to a drill bit chuck which is integrated with a fastening device. The outside of the drill chuck which is arranged above a rotating outer sleeve is sheathed with an additional rotating outer sleeve, and the inside of each outer sleeve is respectively inserted with a circular ring. The two circular rings grind mutually and form a spiral end cam pair. The drill bit chuck which is integrated with the fastening device causes the cam pair to grind mutually to change the axial distance through the additional rotating outer sleeve, and so the purpose of tightening or loosening the drill bit chuck is achieved. The utility model has the advantages of convenient operation and integration of the drill bit chuck and the fastening device.

Description

Drill bit chuck integrated with fastening device

The utility model relates to a kind of and the drill chuck fastening device one, belongs to the mechanical clamp device.It comprises the drill chuck body, three the screwed claws of outer surface, collar nut and rotary sleeves.

At present, the various drill chucks that are used for clamping cylindrical handle drill bit or cutter in the mechanical field, all be to come rotary drilling chuck overcoat to realize the clamping of the drill bit of clamping or cutter or unclamp with having the small conical gear spanner, but because spanner and drill chuck are choristas, lose phenomenon so spanner often occurs, the result brings inconvenience to work.

The utility model purpose is: overcome the deficiency of prior art, provide a kind of application easily with the drill chuck of fastening device one.

Implementation of the present utility model is as follows: the same with prior art, it also comprises drill chuck body 1, three screwed claws 2 of outer surface, collar nut 3 and rotary sleeve 4, collar nut 3 bodies tightly are embedded in the overcoat 4, the threaded engagement of its internal thread and three claws 2, different is: its fastening device is that drill chuck body 1 overcoat above rotary sleeve 4 is followed an additional rotary sleeve 5, an annulus 6 and the annulus 7 end faces break-in mutually that tightly is embedded in overcoat 4 upper ends in tight embedding in the overcoat 5, the mutual break-in end face of two annulus is the inclined-plane in the shape of a spiral, it is right to constitute the spiral end face cam, has annular groove on the end face of the drill chuck body 1 of collar nut 3 lower surface correspondences, next wave ring spring in it.

Fig. 1 is the utility model structural representation.

Fig. 2 tightens rotating cam to structural representation for the utility model.

Fig. 3 tightens rotating cam to structural representation for the big model of the utility model.

Below in conjunction with accompanying drawing the utility model embodiment is done an into narration:

With reference to Fig. 1, when rotary sleeve 4, tight embedding collar nut 3 within it also rotates thereupon synchronously, so the just relative nut 3 of three claws 2 that is meshed with this nut inner thread and make progress simultaneously or move down, be and unclamp or close up trend.Be when closing up clamped condition at drill chuck, in order to clamp gripped object fully, but positive direction rotation outer wrapper attached 5, tight embedding annulus 6 within it is also forward rotation thereupon just.Annulus 6 is right with the annulus 7 formation spiral end face cams that tightly are embedded on the overcoat 4, and the two fit structure as shown in Figure 2.Because the screw inclined plane that the two break-in face adopts, so the two must change axial distance between the two relative to friction when rotating.Like this, the forward rotation of annulus 6 just will make annulus 7 and overcoat 4 stressed and move down until the lower surface of annulus nut 3 and oppress wavy ring spring 8 gradually, make three claws 2 receive tightlyer.If will unclamp, only need counter-rotating overcoat 5, can remove the pressure of 6 pairs of annulus 7 of annulus, then annulus 7 under spring 8 effects again will on move and claw 2 unclamped.To the relatively large drill chuck, need chucking power bigger, so present embodiment can adopt rotating cam shown in Figure 3 to structure, promptly suspending between

cam annulus

6,7 connects a middle annulus 10 to increase spiral axially-displaceable distance.

Claims

1, drill chuck with the fastening device one, comprise drill chuck body 1, three screwed claws 2 of outer surface, collar nut 3 and rotary sleeve 4, collar nut 3 bodies tightly are embedded in the overcoat 4, the threaded engagement of its internal thread and three claws 2, it is characterized in that: additional rotary sleeve 5 of socket outside the drill chuck body 1 above rotary sleeve 4, an annulus 6 and the annulus 7 end faces break-in mutually that tightly is embedded in overcoat 4 upper ends in tight embedding in the overcoat 5, the mutual break-in end face of two annulus is the inclined-plane in the shape of a spiral, it is right to constitute the spiral end face cam, has annular groove on the end face of the drill chuck body 1 of collar nut 3 lower surface correspondences, next wavy ring spring in the groove.