Human-powered driving mechanism

a technology of driving mechanism and human-powered vehicle, which is applied in the direction of vehicle components, rider propulsion, gearing, etc., can solve the problems of reducing the speed increasing ratio below a certain level meaningless, the driving mechanism of a human-powered vehicle has not changed at all in principle, and the speed changing mechanism does not improve energy conversion efficiency. , to achieve the effect of reducing the pedal stroke, increasing the power input, and increasing the speed and torqu
USRE40127E1Inactive Publication Date: 2008-03-04ODA NORIYUKI
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
ODA NORIYUKI
Publication Date
2008-03-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A human powered drive units each including a pair of a rotatable member having a sprocket and a supporting member having a sprocket, which are arranged up and down, and including a chain extended around the rotatable member and the supporting member, are disposed at left and right sides, respectively. The left and right rotatable members 1, 100 are fixed on a driving shaft 15. A chain ring 6 on which the load is applied is mounted on the driving shaft between upper rotatable member 1 and rotatable member 100. In each of the units, constraining means including a free crank (10 for the right-hand unit, and 1000 for the left-hand unit) and arm (11 for the right-hand unit, and 1100 for the left-hand unit), is provided so as to maintain perpendicularity of a shaft of the pedal relative to the plane in which the chain moves. By the rider kicking the pedal along the closed orbit including a linear orbit portion, the force transmitted to the pedal from the foot of the rider is efficiently converted to a rotational force in a longer period of time, thus increasing the power input.
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Description

[0001] This application is a National Stage under 35 U.S.C. § 371 of International Application No. PCT / JP99 / 05147, filed Sep. 21, 1999, published in Japanese (not English) as International Publication No. WO 00 / 17039 on Mar. 30, 2000, which claims the benefit of Japanese Patent Application Nos. 268476 / 1998, filed Sep. 22, 1998, and 266391 / 1999, filed Sep. 20, 1999.TECHNICAL FIELD

[0002] The present invention primarily relates to a driving mechanism for a human-powered vehicle such as a bicycle, a wheelchair, a boat, or a human-powered airplane, or a human-powered machine comparable to a human-powered vehicle, for example, a muscle training machine.BACKGROUND ART

[0003] The driving mechanism for a bicycle and the driving mechanism for a leisure recreational pedal boot are identical in principle. Both driving mechanisms comprise a rotational axle, two cranks, or the left and right cranks, and a pair of pedals. More specifically, the two cranks are rendered different in rotational phase by ...

Claims

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