Device for reducing torque variations for use in drive apparatus
AssigneeShikoku Kakoki Co., Ltd.
InventorsKiyomi Yoshida, Fumiyuki Iwano, Michio Ueda
Life of this patent
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Abstract
A device for reducing torque variations for use in a drive apparatus which has a drive shaft for causing a lift unit to perform one cycle of up-and-down movement for each of at least two lift units to perform one cycle of up-and-down movement at a specified interval by one turn of rotation of the drive shaft. The device comprises elastic means and transmission means for transmitting an elastic force of the elastic means to the drive shaft as a rotational torque.
Claims7
In a drive apparatus having a drive shaft for causing n lift units to each perform one cycle of up-and-down movement at a specified interval by one rotation of the drive shaft, where n is an integer greater than zero, a device for reducing torque variations comprising:
- elastic means for providing an elastic force;
- and
- transmission means for transmitting the elastic force of said elastic means to the drive shaft as a rotational torque,
- wherein the transmission means comprises a main gear fixed to the drive shaft, a driven gear coupled to the main gear for power transmission therebetween, a driven shaft having the driven gear fixed thereto, and an arm fixed to the driven shaft and having a forward end for the elastic force of the elastic means to act upon, and when the number of cycles of torque variations involved in one turn of rotation of the drive shaft is n, the gear ratio of the main gear to the driven gear is n:1.
Dependencies are inferred from the claim text.