| 摘要 |
PROBLEM TO BE SOLVED: To attain a gear device capable of excellently keeping the rotational balance of a crankshaft.SOLUTION: A gear device 100 includes an internal teeth member 6, a carrier 2 (a support member 2X and a support member 2Y), a crankshaft 50 and an external gear 16. An internal gear is formed on an inner circumference of the internal teeth member 6. The carrier 2 is arranged coaxially with an axis line CL1 of the internal gear. The carrier 2 is also rotatably supported by the internal teeth member 6. The crankshaft 50 is arranged coaxially with the axis line CL1 of the internal gear, and is rotatably supported in the carrier 2 by a pair of bearings 28. An eccentric body 20 and a first gear 32 are fixed to the crankshaft 50 between the pair of bearings 28. The external gear 16 meshes with the internal gear. The external gear 16 also engages with the eccentric body 20. The external gear 16 eccentrically rotates around the axis line CL1 of the internal gear in response to rotation of the crankshaft 50. |
