| 摘要 |
A four bar linkage is interconnected between a crank and a force receiving member. The linkage links rotation of the crank to generally elliptical movement of the force receiving member. The linkage includes a first link having a first end rotatably connected to the crank; a second link having a first end rotatably connected to a second, opposite end of the first link, an intermediate portion rotatably connected to the frame, and a second, opposite end rotatably connected to an intermediate portion of a fourth link; a third link having a first end rotatably connected to an intermediate portion of the first link, and a second, opposite end rotatably connected to a first end of the fourth link; and a force receiving member connected to at least one of the first link, the second link, the third link, and the fourth link. |
