Rotation transmitting device and hydraulic drive unit

Abstract

A hydraulic drive device, comprising a hydraulic motor ( 10 ), a rotating body ( 20 ) connected to the drive shaft ( 11 ) of the hydraulic motor( 10 ), functioning, by itself as a flywheel, and having an internal gear ( 21 ) formed on the output side thereof, a rotation transmitting device ( 1 ) having a gear mechanism for transmitting the rotating force of the rotating body ( 20 ) to an output shaft gear ( 50 ) by allowing counter gears ( 30 ) to mesh with the internal gear ( 21 ) and the outer shaft gear ( 50 ) to mesh with the counter gears ( 30 ), and an output shaft connected to the output shaft gear ( 50 ). Whereby, since a variation in rotating speed of the hydraulic motor ( 10 ) can be absorbed by the rotation transmitting device ( 1 ), the hydraulic motor ( 10 ) can be used directly as the drive source of a vehicle such as a car and a truck.

1 . A rotation transmitting device characterized by comprising:
 a rotating body that is connected to an input shaft driven by a motor and functions by itself as a flywheel, and on the output side of which an internal gear is formed; and   a gear mechanism for transmitting rotating force of said rotating body to an output shaft formed on an output shaft gear by allowing the output shaft gear to mesh with said internal gear.   
   
   
       2 . A hydraulic drive unit characterized by comprising:
 a hydraulic motor;   a rotation transmitting device including a rotating body that is connected to a drive shaft of said hydraulic motor and functions by itself as a flywheel, and on the output side of which an internal gear is formed; and a gear mechanism for transmitting rotating force of said rotating body to an output shaft formed on an output shaft gear by allowing the output shaft gear to mesh with said internal gear; and   an output shaft connected to said output shaft gear.