초록 ▼

A drill attachment (10) for decreasing the rotational speed/increasing the output torque of a cutting accessory (14) that is attached to a drill such as a surgical drill (10). The drill attachment has an input drive shaft (34) that is coupled to the drive shaft (16) of the drill to rotate in unison

A drill attachment (10) for decreasing the rotational speed/increasing the output torque of a cutting accessory (14) that is attached to a drill such as a surgical drill (10). The drill attachment has an input drive shaft (34) that is coupled to the drive shaft (16) of the drill to rotate in unison with the drill drive shaft. The input drive shaft rotates a set of axially fixed input planet gears (58). The input planet gears rotate a ring gear (66) that is fitted around the input planet gears. The ring gear rotates a set of axially fixed output planet gears (70). The planet gears rotate an output drive shaft (84). By the selective dimensioning of the drive shaft and gears the output speed/torque can be reduced and increased as desired.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A drill attachment comprising:a housing having first and second opposed ends, said housing first end having a means for releasably coupling said housing to a drill;an input drive s

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A drill attachment comprising:a housing having first and second opposed ends, said housing first end having a means for releasably coupling said housing to a drill;an input drive shaft rotatably coupled to said housing, said input drive shaft having a first end located adjacent said housing first end and a second end distal from said first end, said first end having a coupling mechanism for mating said input drive shaft to a drill shaft, said second end shaped to form an input sun gear;a plurality of input planet gears that are rotatably mounted to a plurality of first axial pins that are fixedly fitted to said housing, said input planet gears being positioned to engage said input sun gear so as to rotate with the rotation of said input drive shaft;a ring gear rotatably disposed in said housing and fitted around said input planet gears, said ring gear having an outer surface and an inner surface, said inner surface being formed with teeth for engaging said input planet gears so that said ring gear rotates with the rotation of said input planet gears;a plurality of output planet gears that are rotatably mounted to a plurality of second axial pins that are fixedly fitted to said housing, said output planet gears being positioned to engage said teeth of said ring gear so that said output planet gears rotate with said rotation of said ring gear;an output drive shaft rotatably coupled to said housing, said output drive shaft having first and second spaced apart ends, said output drive shaft first end having an output sun gear positioned to engage said output planet gears so that said output drive shaft rotates with the rotation of said output planet gears, said output drive shaft second end being located adjacent said housing second end; anda coupling assembly fitted to said output drive shaft second end for releasably coupling a cutting accessory to said output drive shaft so that the cutting accessory rotates in unison with said output drive shaft.