CN2211868Y

CN2211868Y - Mutifunction safety chuck

Info

Publication number: CN2211868Y
Application number: CN 93203701
Authority: CN
Inventors: 仇国璋
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-17
Filing date: 1993-02-17
Publication date: 1995-11-08
Anticipated expiration: 2003-02-17

Abstract

The utility model relates to a multifunctional safety clamping chuck which belongs to a universal accessory for machine tools. The multifunctional safety clamping chuck is composed of a taper shank which is matched with the machine tool, a dense-tooth clutching upper cover which is installed on the taper shank, a dense-tooth clutching lower body, an adjusting nut, a pressure spring and a drill bushing body. The twisting moment is adjusted with the help of the adjusting nut and the pressure spring. When the cutting load of a screw tap exceeds a certain range, the pressure spring which is compressed can cause the engaged teeth of the dense-tooth clutching upper cover and the dense-tooth clutching lower body to slide, so that the screw tap can be prevented from being broken off. The utility model can also be used as a safety clamping chuck for cutting dies and drill bits.

Description

Mutifunction safety chuck

The utility model belongs to the lathe general-purpose accessory.

The tap chuck that current China uses has composite type tap chuck and friction disk type tap chuck, the composite type tap chuck is adjusted torsional moment by clamping cap, after the screw tap cutting load surpasses certain limit, produce relatively between the friction plate and slide, can prevent that screw tap from fractureing, the friction disk type tap chuck is to utilize the strain of rubber washer and produce different moments of torsion, and the shortcoming of these two kinds of tap chucks is to be difficult to make, the expense height, torsional moment is adjusted difficulty.

The purpose of this utility model is at this deficiency of prior art, propose a kind of simple in structure, easy to use, adjust easily, safe and reliable multi-functional insurance chuck, this chuck mainly adjusts nut (4) stage clip (8) by cover (2) close tooth clutch lower body (3) in taper shank (1) that cooperates with lathe and the close tooth clutch that is installed in the adjustment torsional moment on the taper shank and drill bushing body (6) is formed, when drill bushing body (6) is loaded onto screw tap, when carrying out tapping to boring bottom outlet (blind hole), when cutting force exceeds the screw tap torsional moment and do not reach screw tap when fracture, the stressed rated pressure that surpasses stage clip (8) of close tooth interface, compression press spring, the tooth that cover (2) and close tooth clutch lower body (3) are meshed skids, taper shank (1) and the close tooth clutch lower body (3) that is fixed in the above and drill bushing body and screw tap mounted thereto skid, and so just can prevent that screw tap from fractureing.

The utility model is to realize like this, it adjusts nut (4) drill bushing body (6) by cover (2) close tooth clutch lower body (3) in the close tooth clutch of taper shank (1) and stage clip (8) is formed, taper shank (1) is the various Morse taper shanks that cooperate with lathe, its taper shank stub end has the two-stage cylinder coaxial with taper shank, at the big column afterbody screw thread that adjustment nut (4) is installed is arranged, root has keyway.

Cover (2) is cylindrical in the close tooth clutch, and an end is the plane, and the other end has the profile of tooth of circle distribution, and the centre of cylinder has and the circular hole of taper shank (1) big column cooperation, and the keyway of fitting key (7) is arranged on the circular hole.

Close tooth clutch lower body (3) is a drum-shaped structure, small sircle hole is arranged in the middle of the bottom, there is the profile of tooth of circle distribution the end, 4 screwed holes that circle distribution is arranged on the other end, the side has regulates the slotted hole of adjusting nut, be sleeved on the taper shank big column by middle small sircle hole, by stage clip (8) and adjust nut (4) with its with close tooth clutch on the profile of tooth of overlapping mesh, and adjust torsional moment.

Drill bushing body (6) is made up of the two-stage cylinder, there are 4 circular holes the big column end, is installed in by screw (5) on the end face of close tooth clutch lower body, and there is the cylindrical hole of installation taper shank (1) small column the centre, what communicate with cylindrical hole is the taper hole that screw tap is installed, and there is square hole the afterbody side of taper hole.

The utility model when tapping, particularly during the blind hole tapping, is not easy the screw tap that fractures compared with the prior art; On lathe, load onto the external threading instrument, can threading, when the torsional moment overrate, screw die and afterbody are thrown off, and with workpiece with changeing, and guarantee the not random tooth of external screw thread; Can be used for boring equally, when moment of torsion increases, just can throw off and skid, and send to jump and hit sound, can cut-off immediately.

Therefore, the utility model is not only simple in structure, makes easily, and is economic and practical, safe and reliable, and multiple functional, and it both had been applicable to general lathe, also was applicable on the transfer matic of streamline.

Brief Description Of Drawings:

Fig. 1. multi-functional safety clip header structure figure.

Fig. 2. the profile of tooth enlarged drawing.

Among the figure: 1. overlap 3. close tooth clutch lower bodies in the taper shank 2. close tooth clutches

4. adjust nut 5. screws 6. drill bushing bodies 7. keys 8. stage clips

Claims

1, a kind of multi-functional insurance chuck, by taper shank, overlap close tooth clutch lower body in the close tooth clutch, adjust nut, drill bushing body and stage clip are formed, and it is characterized in that, cover (2) is cylindrical in the close tooth clutch, the centre is a circular hole, one end has profile of tooth, is fixed with on the cylinder of taper shank (1) stub end, and close tooth clutch lower body (3) is a drum-shaped structure, one end has profile of tooth, inner chamber is made up of the two-stage concentric circles, is sleeved on the cylinder of taper shank stub end cover (2) profile of tooth engagement in profile of tooth and the close tooth clutch, inner chamber at close tooth clutch lower body, stage clip (8) is installed on the cylinder of taper shank, and fixing by adjusting nut (4), and cylinder bur body (6) is fixed on the non-increment of close tooth clutch lower body.

2, insurance chuck according to claim 1 is characterized in that, taper shank (1) is a Morse taper shank, and stub end has the two-stage cylinder coaxial with taper shank, and the big column afterbody has screw thread, and root has keyway.

3, insurance chuck according to claim 1 is characterized in that, drill bushing body (6) is made up of the two-stage cylinder, 4 circular holes of big column end circle distribution, and there is circular hole the centre, has taper hole and circular hole to communicate in the middle of the small column, and there is a square hole side.