JPS552811A - Power transmission arrangement between two shafts with unrotatable diaphragm interposed therebetween - Google Patents

Abstract

PURPOSE: To provide a power transmission arrangement which can transmit only rotational power from an input power shaft to an output power shaft without any communication of liquid between a driving chamber in which the input power shaft is disposed and a driven chamber in which the output power shaft is disposed and which can transmit the rotation of the input power shaft to the output power shaft at a reduced speed by providing same with a diaphragm for separating the driving chamber from the driven chamber.

CONSTITUTION: An input power shaft 6 is rotatably received in a hollow chamber formed in a casing C. An eccentric rotational member 9 is rotatably mounted on an eccentric peripheral section 17 of the input power shaft 7. The eccentric rotational member 9 is fitted in a center hole of a flexible diaphragm 17 in the form of a curved plate. The diaphragm 17 has its peripheral section secured to the casing C such that it partitions the hollow chamber of the casing C to define a driving chamber a and a driven chamber b. On the other hand, an eccentric wheel section 9₃ of the eccentric rotational member 9 is located in the driven chamber b, and a planetary rotational wheel 10 which is contacted, at its outer periphery, with the cylindrical inner periphery of the casing C without any relative sliding movement therebetween is rotatably fitted around the outer periphery of the eccentric wheel section 9₃. An inner end of the output power shaft 14 located in the driven chamber b is loosely fitted in the rotational wheel 10. Thus, only rotational motion of the rotational wheel 10 around its own axis can be transmitted to the output power shaft 14.

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