A rotary and reciprocating tool comprising:
- an input shaft terminating in an input external spur gear;
- a reciprocating assembly comprising:
- a reciprocating hub positioned coaxially over the input shaft and adjacent to the input external spur gear, the reciprocating hub including a hub external spur gear;
- a planetary reduction gearing assembly including a stationary ring gear, a central sun gear, and a plurality of planet gears between the stationary ring gear and central sun gear, the sun gear coupled to the reciprocating hub;
- a cylindrical cam positioned coaxially over the input shaft and coupled to the planet gears of the planetary reduction gearing assembly;
- a follower including one or more dowels adapted and configured to travel along grooves in the cylindrical cam to translate rotation of the cylindrical cam into linear force;
- and
- a reciprocating shaft adapted and configured to transmit reciprocating force;
- an output shaft positioned coaxially in line with the input shaft, the output shaft having a first end terminating in an output external spur gear positioned adjacent to the input external spur gear and a second end terminating in a chuck;
- a reciprocating block sitting over the output shaft and adapted and configured to:
- reciprocate the output shaft axially when force is received;
- and
- permit rotation of the output shaft;
- a stroke depth adjustment mechanism comprising:
- a stroke control lever rotatable about a fixed pivot point, the stroke control lever defining a first slot;
- a stroke adjuster rotatably fixed at a first end and rotatably coupled to the reciprocating shaft at a second end, the stroke adjuster defining a second slot;
- and
- a slave link rotatably coupled to the reciprocating block at a first end, the slave link having a pin at the second end, the pin lying within both the first slot of the stroke control lever and the second slot of the stroke adjuster, such that rotation of the stroke control lever moves the pin within the second slot of the stroke adjuster and adjusts a length of a reciprocating stroke applied to the slave link;
- a shift collar having an internal spur gear complementary to the input external spur gear, the output external spur gear, and the hub external spur gear, the shift collar slidably positioned over the input external spur gear and adapted and configured to slide between:
- a first position in which the shift collar engages with the input external spur gear and the output external spur gear to rotate the output shaft;
- a second position in which the shift collar engages with the input external spur gear, the output external gear, and the hub external gear spur to rotate and reciprocate the output shaft;
- and
- a third position in which the shift collar engages with the input external gear and the hub external gear spur to reciprocate the output shaft;
- a first synchronization ring adjacent to a first end of the shift collar;
- a second synchronization ring adjacent to a second end of the shift collar;
- and
- a housing.