Gear transmission
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorAkira Takami
Life of this patent
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Abstract
A gear transmission employing at least one pair of non-circular gears to form the intermeshing pitch curves so that one non-circular gear can be given the periodically variable number of rotations on the basis of the exponentially functional increasing mode or the same decreasing mode with respect to the rotational speed of the other non-circular gear, thereby obtaining a gear type continuously variable transmission.
Claims5
A gear transmission being provided with a first rotary shaft, a first non-circular gear fixed thereto, a second rotary shaft, and a second non-circular gear fixed thereto, said first non-circular gear and said second non-circular gear being continuously engageably rotated, thereby transmitting a rotational driving force between said first rotary shaft and said second rotary shaft, said gear transmission characterized in that when the absolute value .vertline..omega.2/.omega.1.vertline. of a ratio of an angular velocity .omega.2 of said second rotary shaft with respect to an angular velocity .omega.1 of said first rotary shaft is represented by F(.theta.) as the function of the angular displacement .theta. of said first rotary shaft, an engageably rotary portion where a differential value K given in a differential equation as to said angular displacement .theta.K=d log F(.theta.)/d.theta. presents a positive or negative constant value in continuation is provided in the shape of intermeshing pitch curves of said first non-circular gear and said second non-circular gear.
A gear transmission being provided with a first rotary shaft, a first non-circular gear fixed thereto, a second rotary shaft, and a second non-circular gear fixed thereto, said first non-circular gear and said second non-circular gear being continuously engageably rotated, thereby transmitting a rotational driving force between said first rotary shaft and said second rotary shaft, said non-circular gear transmission characterized in that when the absolute value .omega.2/.omega.1 of a ratio of an angular velocity .omega.2 of said second non-circular gear with respect to an angular velocity .omega.1 of said first non-circular gear is represented by F(.theta.) as the function of the angular displacement .theta. of said first non-circular gear, an engageably rotary portion where a differential value K given in a differential equation as to said angular displacement .theta.K=d log F(.theta.)/d.theta. presents a constant value or an approximately constant value is provided in the shape of the intermeshing pitch curves of said first and second non-circular gears and through a range of 2.pi. radian of the value of said angular displacement .theta. of said first non-circular gear.
Dependencies are inferred from the claim text.