| 摘要 |
A power storage type direct driving system is provided to reduce a cost of a bicycle by facilitating speed change through only the controlling of flow quantity with a valve without a complicated transmission. A driving force storage unit(10) includes a piston(12) and a spring(11). The piston has a piston ring(13) for preventing outflow of a fluid inside a cylinder(14). The spring supplies the piston with elastic force. A valve(20) controls hydraulic pressure generated from the driving storage unit. A hydraulic pressure power conversion unit(30) converts the hydraulic pressure into rotary force. A tank(40) has a plug(41) to insert the fluid for the hydraulic pressure. A driving force extraction unit(50) has a cylinder(54) including a piston(52) with a piston ring(53) for converting rotary force generated through a pedal side connection gear(51) connected to a pedal side gear into hydraulic pressure. A counter flow preventing device(60) guides the fluid to flow in a one-way direction. A hydraulic pressure hose(70) helps the fluid to flow in the one-way direction by connecting the components. |
