Planetary gear of combustion engine, has planet gear portions that are displaced and spring-loaded in opposite direction, so that gear portions are respectively pressed to play-free engage the meshing portions to ring gear and sun gear

摘要

The gear (1) has planet gear portions (6a-6d) that are rotatably mounted between sun gear (2) and ring gear (3). The meshing portions (7,8) of gear portions are operatively combined to ring gear at radially outer region and to sun gear at radially inner region respectively. The planet gear portions are radially displaced and spring-loaded in opposite directions, so that one of the gear portions is pressed to play-free engage meshing portion (7) to ring gear and other gear portion is pressed to play-free engage the meshing portion (8) to sun gear, in stationary state.