Patent ID: 9726152
Date: 2017-08-08
CPC Classifications: F03D,F05B,F16H,Y02E

Claim:
1. A rotation driving mechanism for windmill for use in a windmill including a base-side structure and a rotation-side structure that is rotatable with respect to the base-side structure, so as to rotate the rotation-side structure with respect to the base-side structure, the rotation driving mechanism for windmill comprising: an annular track part provided in one structure of the base-side structure and the rotation-side structure, the annular track part having a circumferential wall part, and first teeth that are arranged along a circumferential direction of the circumferential wall part such that a facewidth direction of each first tooth extends along a direction in parallel with a central axis direction of the circumferential wall part; a rotation driving part having a rotatable rotating shaft, the rotation driving part being fixed on the other structure of the base-side structure and the rotation-side structure; and a swinging unit including swinging parts each having a meshing part to be meshed with a part of the first teeth, and a swinging part body provided with the meshing part, wherein the swinging parts are arranged along the facewidth direction of the first teeth, and the swinging unit is configured to be relatively moved with respect to the annular track part in a circumferential direction of the annular track part, when the rotating shaft is rotated so that the swinging parts are swung with maintaining a predetermined phase difference thereamong, wherein the meshing part includes second teeth to be meshed with the first teeth.