Axial piston machine having a device for the electrically proportional adjustment of the volumetric displacement
US7299738B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2005 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | May 30, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial piston machine having a swashplate or an oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement. The adjustment unit comprises proportional magnets which can be activated electrically, and a control piston for controlling the oil pressure which moves the servopistons. The proportional magnets act on the control piston along a common tappet axis, a feedback device for feeding back the current swashplate or oblique-axis valve-segment position to the control piston being provided. The feedback device comprises spring levers 6, 6′ which can pivot about an axis, the spring levers 6, 6′ each being mounted on the pivot axis 5 with a bearing shell 15, which are each composed of two component shells which support the spring lever 6, 6′ at separate locations on the pivot axis 5, and which each essentially enclose a half-space about the pivot axis 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.