Patent ID: 6196943
Filing Date: 2001-03-06
Classification: B25B

Abstract:
An electric tool knob apparatus, comprising;a base on which a sleeve is installed and on the sleeve a drive shaft with an external gear wheel is set;a compressing spring which covers on the external diameter of said sleeve with one of its ends;a cam controller including a spur cam-disk and a passive cam-disk;furthermore, on the spur cam-disk, installed a cam salient which has a plurality of circularly arranged cam-disk flange (3011) with same angle on the edge and between the cam-disk flange (3011) a cam-disk recess (3012) is formed corresponding to the cam-disk flange (3011), and a plurality of circularly arranged cylinder is installed on the spur cam-disk in the axial direction; the passive cam-disk has a shield in which a cam-disk recess 301 is created corresponding to the said cam-disk flange (3011) and a cam-disk flange 312 corresponding to the said cam-disk recess (3012) that make the said cam salient may be completely covered by the inside diameter of passive cam-disk; the passive cam-disk has a plurality of square salient installed on the flange and the said compressing spring covers the shield of passive cam-disk with the other end and makes shield pass through the inside diameter of spur cam-disk and passive cam-disk;a plurality of planet gear wheel which is installed on the cylinder of the said spur cam-disk and may unrestrainedly rotate; anda knob which is installed on the said base and covers the said cam controller, the said compressing spring and the said shield; inside the knob, a circularly inward gear is installed for making the said planet gear engage with the inward gear and external gear wheel, and in the axial direction, a plurality of sliding surface is set corresponding to the square salient of passive cam-disk; therefore, the square salient may unrestrainedly move with the sliding surface.