Patent ID: 9719553
Date: 2017-08-01
CPC Classifications: B25J,F16C,F16H,Y10S

Claim:
1. A rotation drive device, comprising: a drive source; a crankshaft with one end connected to and rotated by the drive source, the crankshaft sequentially including a rotation drive portion, a shaft portion and a driven portion, the shaft portion having two ends connected to the rotation drive portion and the driven portion, respectively, the rotation drive portion including a terminal-end-surface center point formed at a center of a terminal end surface of the rotation drive portion, the driven portion including a terminal-end-surface center point formed at a center of a terminal end surface of the driven portion, the two terminal-end-surface center points are concentric with each other, wherein a circle is centered on the two terminal-end-surface center points, the two ends of the shaft portion are connected at different central angles of the circle to the rotation drive portion and the driven portion, respectively, the shaft portion sequentially includes a first connecting section connected to the rotation drive portion, a second connecting section connected to the driven portion, and an extension section connected between the first and second connecting sections, wherein a direction connected between the two terminal-end-surface center points is defined as an axial direction, and the extension section extends in a direction at an angle to the axial direction, and the angle is smaller than 45 degrees; and a driven device connected to another end of the crankshaft and driven to rotate by the crankshaft.