| 摘要 |
Electric tool knob control apparatus comprises a compressing spring and a cam controller, which are set consequently on the sleeve of drive shaft base. Compressing spring is set between cam controller and base. On the sleeve, an external gearwheel is installed. Cam controller includes a spur cam-disk and a passive cam-disk. On spur cam-disk and passive cam-disk, a cam-disk flange and a cam-disk recess are circularly arranged and oppositely set up; therefore, cam-disk flange and cam-disk recess may engage to each other. On spur cam-disk, a plurality of planet gearwheel is set pivotally. By covering the outside of cam controller and sleeve with a knob with inward gear set inside diameter, planet gear wheel may engage with inward gear and external gear wheel in the same time. Also, passive cam-disk, which engages with knob, may rotate with knob and move in axial direction of knob. Passive cam-disk and spur cam-disk may be driven to rotate while knob is moved to rotate. Therefore, passive cam-disk moves along axial direction to relax and compress the compressing spring for regulating drive shaft torque. By the rotational speed difference, knob may regulate torque and be homed in 360°. |
