| 摘要 |
A fluid pressure device of the inner gearing type comprising an outer gear having circumferentially arranged external teeth, and an inner gear eccentrically disposed relative to the outer gear and having circumferentially arranged internal teeth in meshing engagement with the external teeth of the outer gear, so that one of the gears makes an orbital movement around the axis of the other gear while rotating around its own axis. The inner gear is mounted in a stationary ring member in inner gearing relation so as to be able to make orbital movement relative to the stationary ring. Alternatively, the outer gear is mounted in an inner gearing relation around a rotary member which is adapted to rotate in unison with the input/output shaft of the device so as to be able to make an orbital movement around the rotary member. The inner gearing relation is realized by a plurality of cylindrical axially extending pins circumferentially disposed on one of the associated members and a plurality of dents having an arcuate profile in meshing engagement with each pin and circumferentially formed on the other of the associated members, the number of the dents being equal to that of the pins. According to this arrangement, it is possible to attain a highly efficient transmission of only the rotation, while cancelling the orbital movement, between the input/output shaft and the inner gear or outer gear which makes both of the orbital movement and rotation simultaneously within the fluid pressure device. |
