Title:
Continuation variable toroidal gearbox
Document Type and Number:
Japanese Patent JP6240614
Kind Code:
B2
Abstract:
A variator is disclosed that has an input surface and an output surface coaxially mounted for rotation about a variator axis, and a toroidal cavity being defined between the working surfaces. A plurality of rolling elements are disposed between and being in driving engagement through a traction fluid with the input and the output surfaces at respective contact regions. Each rolling element is mounted on a carriage assembly for rotation about a rolling axis, and is being free to pivot about a tilt axis, the tilt axis passing through the rolling element perpendicular to the rolling axis, and intersecting the rolling axis at a roller centre, whereby a change in the tilt axis causes a change in the variator ratio being the ratio of rotational speeds of the races. Each carriage assembly can cause pivotal movement, about a pitch axis, that results in a change of a pitch angle of the rolling element. The pitch axis passes through the roller centre and through the contact regions. The variator further comprises a control member to cause a respective carriage assembly to undertake the said pivotal movement thereby changing the pitch angle, so urging the plurality of rolling elements to pivot about their tilt axes and thereby provide a change in variator ratio.
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Inventors:
De Freitas Andrew
Datson brian
Datson brian
Application Number:
JP2014551618A
Publication Date:
November 29, 2017
Filing Date:
January 10, 2013
Export Citation:
Assignee:
Torotrak (Development) Limited
International Classes:
F16H15/38
Domestic Patent References:
| JP2007502393A | ||||
| JP2011153638A | ||||
| JP4121567U | ||||
| JP2008249117A | ||||
| JP2010144743A |
Foreign References:
| US3394617 | ||||
| US3267756 |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Disciple Maru Ken
Mitsuru Matsushita
Ichiro Kurasawa
Sadao Kumakura
Disciple Maru Ken
Mitsuru Matsushita
Ichiro Kurasawa