CN2076893U - Hand threading machine - Google Patents

Abstract

The utility model relates to a hand threading machine composed of a motor, an umbrella-shaped driving wheel, a clockwise rotating driving wheel, an anticlockwise rotating driving wheel and a main shaft assembled with a screw tap. The upper part of the clockwise rotating driving wheel and the anticlockwise rotating driving wheel is provided with a steel ball and a spring tab, and the lower part of the clockwise rotating driving wheel and the anticlockwise rotating driving wheel is provided with a ball bearing and a handle. Under general condition, the upper part of the clockwise rotating driving wheel and the anticlockwise rotating driving wheel contacts with the umbrella-shaped driving wheel to cause the main shaft to rotate inversely under the action of the spring tab. When the handle is tightly grasped, the lower part of the clockwise rotating driving wheel and the anticlockwise rotating driving wheel contacts with the umbrella-shaped driving wheel to cause the main shaft to work for threading. A positioning sleeve is arranged out of the main shaft assembled with the screw tap to ensure the vertical accuracy of threading.

Description

Hand threading machine

The utility model belong to a kind of on workpiece the instrument of tapping.

In the prior art on workpiece hole the most frequently used instrument of tapping be set tap, although the existing now special purpose machine tool that supplies tapping to use, but this class special purpose machine tool all is a permanent plant, workpiece there is certain limitation, the span of tapping lathe horn does not reach the position that needs tapping on the workpiece and just can't use, and still can only make tapping by hand.Especially in the maintenance of some already installed equipment or large-scale parts, just more can't use the special-purpose tapper of this class in the prior art.

The purpose of this utility model is the portable appliance of a kind of similar electric hand drill of the prior art of invention, and can be implemented in the effect that the workpiece hole previous generation takes the place of worker's tapping.

Use because this kind equipment of electric hand drill is only limited to a direction rotation, and the screw tap of tapping is wanted just commentaries on classics, stall and counter-rotating deftly repeatedly at short notice when work.If frequent at short notice reversing rotation of motors certainly will increase power consumption and damage motor.The key of enforcement means of the present utility model is a kind of transmission mechanisms of the dexterous just commentaries on classics of conversion main shaft, stall and counter-rotating direction of rotation at short notice of design, and in whole use, motor remains a direction rotation.

The utility model has the advantages that provides a kind of simple in structure, hand held, electric tapping tool easy to use, solved under the situation that existing tapper cannot use at some position of some workpiece and some equipment and still needed the problem of screw tap by hand, replaced hand labour effectively.

Accompanying drawing drawing of the present utility model is described as follows:

Portable tapping machine structural representation

The 1-motor, 2-umbrella shape drive, 3-rotating drive, 4-main shaft, 5-spring leaf, 6-handgrip, 7-spring, 8-orienting cover, 9-screw tap, 10-drill point, the long copper sheathing of 11-, 12-housing, 13-plane ball bearing, 14-steel ball, the short copper sheathing of 15-.

Accompanying drawing is an embodiment of the present utility model, and it is by motor 1, by be installed in the housing 12 umbrella shape drive 2 and with the rotating drive 3 of its coupling, contact and drive main shaft 4 rotations.The top of main shaft 4 is with short copper sheathing 15, and the middle part is with long copper sheathing 11, and plane ball bearing 13 is housed, the endoporus tight fit of the shell of plane ball bearing 13 and rotating drive 3, and cover contacts with handgrip 6 in it, thereby handgrip can not rotate with main shaft.The endoporus of rotating drive 3 and plane ball bearing 13 can be in axial sliding along main shaft 4.In the ordinary course of things, because the effect of spring leaf 5, main shaft is depressed, the upper wheels of rotating drive 3 contact with umbrella shape drive 2 and main shaft 4 is rotated by counter clockwise direction by steel ball 14.When grasping handgrip 6, handgrip 6 is made axial translation as shift fork along main shaft 4, lifts rotating drive 3 and moves up and itself and umbrella shape drive 2 are disengaged, thereby make main shaft 4 stalls.When further when holding tight handgrip 6, handgrip 6 further lifts rotating drive 3, thereby and its lower wheel is contacted with umbrella shape drive 2 main shaft 4 is rotated in the direction of the clock, main shaft 4 relies on drill points 10 to drive screw taps 9 rotations and carries out tapping work.When tapping owing to spring 7 has compressed the perpendicularity that orienting cover 8 has guaranteed screw thread.When hand loosens handgrip 6, main shaft 4 stalls, when further all unclamping handgrip 6, the screw thread that main shaft 4 withdraws from screw tap by rotation counterclockwise to have attacked.The rotating speed of main shaft 4 is 300 rev/mins, the oil groove grease lubrication in the length copper sheathing 11 and 15.

Claims (1)

1, a kind of portable tapping machine, it is characterized in that: rotating drive of assembling on the main shaft that can adorn screw tap, on the top of rotating drive steel ball and spring leaf are housed, in the endoporus bottom of rotating drive and the shell tight fit of a ball bearing, rotating drive and ball bearing can move axially along main shaft by stirring up and down of handgrip.In the lower end of main shaft spring and orienting cover are housed, the same umbrella shape drive with motor linkage of rotating drive mates, and does driven rotation.

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