Patent ID: 8641022
Filing Date: 2014-02-04
Classification: B62K,F16F

Abstract:
1. A front fork comprising: an inner tube in a vehicle body side being slidably inserted into an outer tube in a wheel side; a hollow pipe having a partition wall portion coming into slidable contact with an inner periphery of the inner tube being provided in a rising manner in a bottom portion within the outer tube; an oil chamber in which a piston provided in an inner periphery of a leading end portion of the inner tube moves back and forth being provided in an outer periphery of the hollow pipe, and the oil chamber being comparted into an upper oil chamber above the piston and a lower oil chamber below the piston by the piston; an oil reservoir chamber running into an upper portion of the inner tube being defined in an inner periphery of the hollow pipe, and an upper portion of the oil reservoir chamber being formed as an air chamber; a volumetric capacity compensating flow path provided in the hollow pipe to communicate the oil chamber in the outer periphery of the hollow pipe with the oil reservoir chamber in the inner periphery of the hollow pipe for compensating an oil at a volumetric capacity at which the inner tube goes into and out of the oil chamber in the outer periphery of the hollow pipe; and an annular gap chamber sandwiched by a slide guide fixed to an inner periphery of the outer tube and a slide guide fixed to an outer periphery of the inner tube, the annular gap chamber being provided between the outer tube and the inner tube, and the inner tube being provided with at least one hole which communicates the annular gap chamber with the oil chamber in the outer periphery of the hollow pipe, wherein a throttle flow path is provided between the hole which is provided in the inner tube and is communicated with the annular gap chamber, and the lower oil chamber in the outer periphery of the hollow pipe.