A HYDRO-MECHANICAL TRANSMISSION PLANETARY CARRIER SUPPORT SYSTEM

摘要

In a hydro-mechanical transmission (10) having a hydrostatic unit (20) and a mechanical gear train, the hydrostatic unit (20) is resiliently mounted in the transmission housing (12) to reduce the transmission (10) of noise and vibration to the housing (12). Movement of the hydrostatic unit (20) is facilitated by mounting the planetary carrier (50) on a ball bearing (68) instead of taper roller bearings. The ball bearing (68) allows the carrier (50) limited movement transverse to the axis of rotation of the carrier (50). To further reduce wear of the gear faces, one or more of the meshing gears (P1, P2, 48) at the point of relative movement have crowned gear faces (70) rather than straight gear faces. This avoids a single line of contact of the meshing teeth at the tooth edge.