| 摘要 |
PROBLEM TO BE SOLVED: To provide a new structure which suppresses positional deviation to an axial direction between a crank shaft having an eccentric body and an external gear.SOLUTION: A gear transmission 10 includes: a case 20 having an internal gear 21; a carrier 30 supported by a case; a crank shaft 40 having two pieces of eccentric bodies 42a, 42b; two pieces of external gears 50a, 50b rotatable with respect to the case while being engaged with the internal gear by the engagement with the eccentric bodies; and a regulation disk 60 held between the two pieces of eccentric bodies and for regulating relative movement of the crank shaft with respect to the external gear in an axial direction by coming into contact with the external gear. In the regulation disc, a through-hole 61 in which the eccentric body can pass through is formed. In the regulation disc, the center of the through-hole is arranged so as to be deviated from axis lines of the two eccentric bodies, and the movement with respect to the crank shaft along the axial direction between the two eccentric bodies 42 is regulated.SELECTED DRAWING: Figure 1 |
