Parallel hydromechanical underdrive transmission
US6530855B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2001 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | May 23, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2039/005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A parallel hydromechanical continuously variable transmission has a housing (107) that holds a make-up pump (52), and has internal cavities for holding operating assemblies of the transmission, including an axial piston pump (50) and an axial piston motor (60). The pump (50) and motor (60) each has a rotating element (206) and a non-rotating element (258). Each non-rotating pump element is mounted for tilting movement on trunnions (258P) in its own respective pair of mounting journals in the housing (107). The tilting axes of the non-rotating elements (258) lie transverse to the axes of rotation of the rotating elements (206). The pump (50) and the motor (60) are disposed side-by-side in the housing (107) with the axes of rotation approximately parallel to each other. A stationary manifold (70), fixed to the housing (107), has one surface in contact with the rotating pump element (206P) and a second surface in contact with the rotating motor element (206M). Fluid passages (149, 208) open in the two surfaces in fluid communication with the pump and motor cylinders (206) through a pump/manifold interface. Internal fluid passages (149, 208) in the stationary manifold (70) convey fluid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.