| 摘要 |
A shock absorbing fork for a bicycle or other two-wheeled vehicle of the type having a pair of telescoping struts, with upper tubes which are interconnected by an upper crown to a steerer tube at an upper end portion thereof and lower tubes which are which mount a wheel axle at a bottom end thereof. Within at least one of the telescoping struts a spring arrangement and/or a hydraulic damping arrangement is provided which is acted upon as the upper tube and the lower tube move toward each other for absorbing impact shocks experienced by the wheel of the bicycle. For shock absorbing forks in which no hydraulic damping arrangement is provided or it is contained within a separate cylinder or cartridge which isolates its hydraulic damping fluid from walls of the telescoping tubes, so that damping fluid cannot be used as a source of lubricant for the telescopic tubes, according to the invention, a predetermined free quantity of liquid lubricant is provided in the bottom of the lower tube in a volume that small enough so as not to be directly acted upon by the upper tube even during maximum (inward) compressive telescoping of the strut, but which is sufficient to migrate along the length of the lower tube without being directly acted upon by the reciprocating motion of the tubes relative to each other. |
