V-belt type automatically variable transmission
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorJyoji Tamura
Life of this patent
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Abstract
V-belt type variable transmission including primary and secondary sheave assemblies which are connected together by an endless V-belt, the primary sheave assembly having a centrifugal device for biasing it so that the effective diameter of the primary sheave assembly is increased in accordance with an increase in drive shaft. The secondary sheave assembly has a cam device for biasing it in a direction wherein the effective diameter thereof is increased under the force applied by the cam device. In addition, the secondary sheave assembly is provided with a centrifugal device which centrifugally biases it to assist the action of the cam device.
Claims7
V-belt type automatically variable transmission comprising a primary sheave assembly having an effective diameter and mounted on a drive shaft adapted to be driven by a primemover, centrifugal means associated with the primary sheave assembly for biasing it so that the effective diameter is increased in accordance with an increase in rotating speed of the drive shaft, a secondary sheave assembly having an effective diameter and provided on a driven shaft, cam means associated with said secondary sheave assembly for biasing it so that the effective diameter is increased in accordance with an increase in torque load on the driven shaft, V-belt means stretched between the primary and secondary sheave assemblies for interconnecting the assemblies, second centrifugal means adapted to be rotated together with the driven shaft, said second centrifugal means being associated with said secondary sheave assembly so that it is centrifugally biased in a direction wherein the effective diameter of the secondary sheave assembly is increased.
Dependencies are inferred from the claim text.