Title:
TOROIDAL GEARBOX WITH A HYDRAULIC PRESSURE DEVICE
Document Type and Number:
WIPO Patent Application WO2005045284
Kind Code:
A3
Abstract:
The invention relates to a toroidal gearbox, comprising an annular central disc (31) with a toroidal friction surface (63) and an annular main cylinder (4) of a hydraulic pressure device, each fixed concentrically to a central shaft. The main cylinder, supported on an axial counter-bearing, is provided with a radial partition wall (5) to form two working pressure chambers, in each of which an axial pressure piston is arranged, the pressurisation of which results in an axial operation of the central disc arranged to be axially displaced relative to the central shaft, such that pressure forces may be brought to bear on the friction surface. The main pressure piston (9), lying on the front face of the partition wall facing away from the central disc, comprises an axial projection (11) as mechanical operating means, effectively bypassing the partition wall and which acts on the central disc, in addition to the operation thereof by the second pressure piston, lying on the side of the partition wall facing the central disc. An even distribution of the operating force in the circumferential direction, as exerted on the central disc, by the main pressure piston, may be achieved, whereby the axial projection of the main pressure piston has an annular embodiment coaxial to the pressure piston and also projects through the central opening of the partition wall (fig. 1) or radially overlaps the partition wall.
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Inventors:
HENZLER STEFFEN (DE)
Application Number:
PCT/EP2004/012424
Publication Date:
August 18, 2005
Filing Date:
November 03, 2004
Export Citation:
Assignee:
DAIMLER CHRYSLER AG (DE)
HENZLER STEFFEN (DE)
HENZLER STEFFEN (DE)
International Classes:
F15B15/14; F16D25/063; F16H15/38; F16H61/662; F16H61/664; (IPC1-7): F16H61/00; F16H15/38; F15B15/14
Domestic Patent References:
| WO2002053945A1 | 2002-07-11 |
Foreign References:
| US4272999A | 1981-06-16 | |||
| US6740001B1 | 2004-05-25 | |||
| US20030078133A1 | 2003-04-24 | |||
| US4186616A | 1980-02-05 | |||
| GB1146322A | 1969-03-26 | |||
| US4252033A | 1981-02-24 | |||
| US3008337A | 1961-11-14 | |||
| EP1148270A1 | 2001-10-24 |
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