Toroidal continuously variable transmission for preventing the loosening of a loading nut
First Claim
1. A toroidal continuously variable transmission comprising:
- a main shaft having a step section;
an input disc drivably supported on the main shaft and movable axially along an axis of the main shaft;
an output disc rotatably supported on the main shaft and located facing said input disc;
a power roller disposed between and in frictional engagement with said input disc and said output disc so as to make transmission of power from said input disc to said output disc;
belleville springs each having a center opening, said belleville springs being disposed around the main shaft and located at an opposite side of said input disc with respect to said output disc so as to press said input disc toward said output disc;
a loading nut screwed on the main shaft to restrict an expansion amount of the belleville springs, said loading nut axially facing the step section of said main shaft; and
a sleeve disposed between said loading nut and the step section of the main shaft, said sleeve being separable from said loading nut, said sleeve being disposed around the main shaft and having a major part clear of the main shaft, said belleville springs abutting said sleeve in a manner that said sleeve passes through the central opening of each belleville spring.
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Accused Products
Abstract
A toroidal continuously variable transmission comprises a main shaft having a step section. An input disc is drivably supported on the main shaft and axially movable along the axis of the main shaft. An output disc is rotatably supported on the main shaft and located facing the input disc. A power roller is disposed between and in frictional engagement with the input disc and the output disc so as to make transmission of power from the input disc to the output disc. Belleville springs (each having a center opening) are disposed around the main shaft and located at an opposite side of the input disc with respect to the output disc so as to press the input disc toward the output disc. A loading nut is screwed on the main shaft to restrict an expansion amount of the Belleville springs. The loading nut axially faces the step section of the main shaft. A sleeve is disposed between the loading nut and the step section of the main shaft. The sleeve is separable from the loading nut. The Belleville springs are mounted on the sleeve in a manner that the sleeve passes through the central opening of each Belleville spring.
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Citations
13 Claims
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1. A toroidal continuously variable transmission comprising:
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a main shaft having a step section; an input disc drivably supported on the main shaft and movable axially along an axis of the main shaft; an output disc rotatably supported on the main shaft and located facing said input disc; a power roller disposed between and in frictional engagement with said input disc and said output disc so as to make transmission of power from said input disc to said output disc; belleville springs each having a center opening, said belleville springs being disposed around the main shaft and located at an opposite side of said input disc with respect to said output disc so as to press said input disc toward said output disc; a loading nut screwed on the main shaft to restrict an expansion amount of the belleville springs, said loading nut axially facing the step section of said main shaft; and a sleeve disposed between said loading nut and the step section of the main shaft, said sleeve being separable from said loading nut, said sleeve being disposed around the main shaft and having a major part clear of the main shaft, said belleville springs abutting said sleeve in a manner that said sleeve passes through the central opening of each belleville spring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A toroidal continuously variable transmission comprising:
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a main shaft having a step section; an input disc drivably supported on the main shaft and movable axially along an axis of the main shaft; an output disc rotatably supported on the main shaft and located facing said input disc; a power roller disposed between and in frictional engagement with said input disc and said output disc so as to make transmission of power from said input disc to said output disc; belleville springs each having a center opening, said belleville springs being disposed around the main shaft and located at an opposite side of said input disc with respect to said output disc so as to press said input disc toward said output disc; a loading nut screwed on the main shaft to restrict an expansion amount of the belleville springs, said loading nut axially facing the step section of said main shaft; and a sleeve disposed between said loading nut and the step section of the main shaft and disposed around said main shaft, said sleeve being separable from said loading nut, said belleville springs abutting said sleeve in a manner that said sleeve passes through the central opening of each belleville spring, said sleeve having a flange section located around said main shaft and extending radially inward toward an outer peripheral surface of said main shaft, said flange section being in contact with the step section of said main shaft, and a cylindrical section integral and coaxial with said flange section, said cylindrical section being larger in axial length than said flange section and radially clear of the outer peripheral surface of said main shaft, said cylindrical section being in contact with said loading nut.
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Specification