초록 ▼

Mechanism to generate the end load for a toroidal race rolling friction transmission. A chamber connected to a source of high-pressure fluid is formed by two parts, one of which is connected to the input disc of the transmission and the other to the contra-rotating output disc. The gap between the t

Mechanism to generate the end load for a toroidal race rolling friction transmission. A chamber connected to a source of high-pressure fluid is formed by two parts, one of which is connected to the input disc of the transmission and the other to the contra-rotating output disc. The gap between the two parts is sealed by a member, for instance a sleeve or ring, fixed to some part of the transmission or associated structure that is stationary or that rotates only slowly, so that the speed of rotation of the sealing member is intermediate to those of the two discs. The specification describes how the pressure within the chamber may be related to the torque transmitted between the discs, how means other than chamber pressure may be used to generate a pre-load force to hold the discs in engagement when the unit is at rest, and how the rise in pressure within the chamber upon the unit coming into operation may relieve the thrust race that withstands the reaction of one disc against the other due to the pre-load when at rest.

대표청구항 ▼

A toroidal race rolling traction transmission having structural parts including an input disc and an output disc mounted to rotate in opposite directions about a common axis and rollers providing a driving connection between said disc, and also including: hydraulic actuation means including a variab

A toroidal race rolling traction transmission having structural parts including an input disc and an output disc mounted to rotate in opposite directions about a common axis and rollers providing a driving connection between said disc, and also including: hydraulic actuation means including a variable capacity chamber and operable in use to urge said input and output discs towards each other, said chamber comprising first and second defining parts; said first part of said chamber being connected to said input disc so as to rotate about said common axis in the same direction as said input disc; said second part of said chamber being connected to said output disc so as to rotate about said common axis in the same direction as said output disc and thus in contra-rotation to said first part; said first and second parts of said chamber being separated by a gap a dimension of which lies parallel to said common axis, and having elements capable of limited movement in a direction also parallel to said common axis; an annular rubbing sealing member coaxial with said common axis which seals said gap, said sealing member being fixed to a structural part of said transmission other than said input disc and said output disc, whereby, in use, said sealing member rotates about said common axis at a speed, including zero absolute speed, intermediate that of said first and second parts of said chamber.