Adjustable pulley with improved support structure
First Claim
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1. An adjustable pulley, comprising:
- a pulley shaft;
two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft, and wherein said axially movable disc is supported radially outward from said shaft, said support being provided eccentrically with respect to said pulley shaft.
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Abstract
In a continuously variable transmission with a pulley having discs (1, 2) wherebetween a driving belt (12) runs, at least one of the discs is movable for influencing the transmission ratio of the transmission. The moveable disc (1; 2) being mounted on a shaft (3), by support members (5; 7; 16, 18; 20, 21) possibly formed eccentrically relative to the shaft (3).
The support members take up the forces exerted by the driving belt (12) close to the point of application of the forces, so that in particular the movable pulley disc may be constructed less rigid, with a smaller mass and at a reduced cost price.
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Citations
25 Claims
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1. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft, and wherein said axially movable disc is supported radially outward from said shaft, said support being provided eccentrically with respect to said pulley shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 25)
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8. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft, and wherein said axially movable disc is supported radially outward from said shaft; a cylinder structure fixed to said axially movable disc defining a cylinder chamber; a piston member fixed on said shaft and disposed in said cylinder chamber; and a pin member extending from said axially movable disc in a direction opposite from said other disc and extending slidably through said piston member, said pin being disposed radially outward of said shaft in parallel thereto thus providing said radially outward support.
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9. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft and wherein said axially movable disc is supported radially outward from said shaft, wherein said radially outward support is provided by a bellows construction extending parallel to the shaft. - View Dependent Claims (10, 11, 12)
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13. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft and wherein said axially movable disc is supported radially outward from said shaft, and a cylinder assembly comprising a first cylinder member closed on a first end by slidable engagement with said axially movable disc said first cylinder member communicating with and overlapping a second cylinder member on a second end, said first and second cylinder members being radially fixed relative to each other and defining a cylinder chamber, whereby a change of pressure in said cylinder chamber provides axial movement of said axially movable disc. - View Dependent Claims (14, 15, 16)
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17. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft and wherein said axially movable disc is supported radially outward from said shaft by at least one fluid bearing provided as a fluid limiter, whereby fluid is provided between said discs and said fluid limiter. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An adjustable pulley, comprising:
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a pulley shaft; two discs disposed on said pulley shaft, said discs fixed against rotation relative to said shaft with one of said discs being axially movable on said shaft and wherein said axially movable disc is supported radially outward from said shaft; a cylinder structure fixed relative to said discs and defining a cylinder chamber; a piston member disposed in said cylinder chamber; and at least one bearing disposed on said piston member providing said radial outward support of said axially movable disc, whereby the axial position of said bearing supporting said axially movable disc may be varied by changing pressure in said cylinder chamber.
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Specification