| 摘要 |
The disclosure related to a rotary counterbalancing mechanism comprising a rotatable input (19, 22), a pair of aligned linearly movable outputs (24, 25), means (23) to convert rotation of said input into sinusoidal oscillation of said outputs between minimum and maximum displacement positions and 90° out of phase with each other and spring means (29) for resisting said oscillating movement of the outputs away from said minimum positions. The means to convert rotary motion of the input into linear movement of said two outputs comprise a rotatable cam (23) mounted to rotate about a fixed axis and the outputs comprise two cam followers (30) engaging the cam on opposite sides thereof and mounted for linear movement along a common line of action with each other which passes through the axis or rotation of the cam, said spring means (29) acting on the respective followers biasing the followers towards the cam to resist rotation of the cam. |
