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 grasping apparatus that can be miniaturized and compacted to be mountable in small-size equipment or the like and reduced in weight, and a construction machine in which the grasping apparatus is mounted. The grasping apparatus has a gear mechanism 30 in which an annular inner gear 71 is disposed concentrically with a sun gear 73, plural intermediate gears 68 are interposed in an annular space between the inner gear 71 and the sun gear 73, the plural intermediate gears 68 are freely rotatably supported by a bracket secured to a construction machine or the like, a grasping apparatus swing cylinder 23 rotated by the sun gear 73 or the inner gear 71 is equipped to the construction machine or the like as equipment, an upper fork 36 is secured to the inner gear 71, a lower fork 32 that grasps a conveyance target object 90 or the like in cooperation with the upper fork 36 is secured to the sun gear 73 to which rotating force is transmitted from the inner gear 71 through the intermediate gears 68.