Abstract: A power generation device capable of achieving reduction in size and compactification and further increasing a power generation amount is provided.

Abstract: A power generation device capable of achieving reduction in size and compactification, and increasing a change gear ratio is provided. In a power generation device 20 of a vehicle including a front wheel as a drive wheel and a rear wheel 13 as a driven wheel, a gear mechanism 30A as an input side gear mechanism in which a ring-shaped internal gear 37 is disposed coaxially with a sun gear 38 and a plurality of intermediate gears 36 are interposed in a ring-shaped space between the internal gear 37 and the sun gear 38 is fixed to the vehicle via a cylinder member 22 as a support shaft having an axis matched with an axis of a cup-shaped joint 51 as a rotation shaft of the rear wheel 13, the internal gear 37 of the gear mechanism 30A is formed to be integrally rotatable with the rear wheel 13, an output shaft 52 penetrating through the cylinder member 22 is fixed to the sun gear 38, and a power generator 53 is provided at the output shaft 52.

Abstract: A power generation device capable of achieving reduction in size and compactification, and increasing a change gear ratio is provided. In a power generation device 20 of a vehicle including a front wheel as a drive wheel and a rear wheel 13 as a driven wheel, a gear mechanism 30A as an input side gear mechanism in which a ring-shaped internal gear 37 is disposed coaxially with a sun gear 38 and a plurality of intermediate gears 36 are interposed in a ring-shaped space between the internal gear 37 and the sun gear 38 is fixed to the vehicle via a cylinder member 22 as a support shaft having an axis matched with an axis of a cup-shaped joint 51 as a rotation shaft of the rear wheel 13, the internal gear 37 of the gear mechanism 30A is formed to be integrally rotatable with the rear wheel 13, an output shaft 52 penetrating through the cylinder member 22 is fixed to the sun gear 38, and a power generator 53 is provided at the output shaft 52.