Patent ID: 8657317
Filing Date: 2014-02-25
Classification: B62J,B62K,F16B,Y10T

Abstract:
1. A quick-release fixing structure of a bicycle; comprising: a fender; a front fork; a mounting member having a top surface pressed against an abutting edge at an end of the front fork, in a bottom of the mounting member being formed a receiving cavity whose axial direction is defined as a longitudinal direction, and the mounting member being formed around its periphery with two penetrating holes which penetrate through the periphery of the mounting member to leave two cutting grooves on an inner surface of the receiving cavity, and the cutting grooves being in communication with the receiving cavity and the penetrating holes, an axial direction of the penetrating holes being defined as a transverse direction, an elastic piece extending from the mounting member, and a bolt which extends in the longitudinal direction being inserted through the receiving cavity and screwed with a tightening device, in a bottom of the receiving cavity being formed a tapered hole tapering toward the front fork, the mounting member being formed around its periphery with two opposite arc-shaped surfaces, the penetrating holes penetrating through the arc-shaped surfaces, the elastic piece extending from an end of one of the arc-shaped surfaces of the mounting member, and the bolt being inserted through the receiving cavity and screwed with the tightening device; an engaging member received in the receiving cavity of the mounting member and formed around its periphery with two arc-shaped cutting grooves for mating with the arc-shaped cutting grooves of the mounting member; and an U-shaped control member provided with a pressing section and two engaging sections at both ends of the pressing section, the engaging sections of the control member being inserted in the penetrating holes, each of the engaging sections being formed on an inner surface thereof facing the engaging member with an arc-shaped groove for mating with the cutting groove of the mounting member, the elastic piece of the mounting member being capable of pressing against the pressing section of the control member to make the arc-shaped grooves of the control member misaligned with the cutting grooves of the mounting member, so that the engaging member is engaged with the mounting member, or make the arc-shaped grooves of the control member aligned with the cutting grooves of the mounting member, so that the engaging member is disengaged from the mounting member, the pressing section being formed in the middle of the control member, each of the engaging sections being formed at an end thereof with a positioning protrusion, so that when the engaging sections are inserted in the penetrating holes, the positioning protrusions are pressed against an outer edge of the penetrating holes; and the fender being fixed to the end of the front fork, and the engaging member being disposed on the fender; wherein the tightening device is fixed by pressing against an inner surface of the front fork and comprises a clamping sleeve and a tightening member: the clamping sleeve which extends in the longitudinal direction is mounted on the top surface of the mounting member and includes an open end and a connecting end, the clamping sleeve is formed with a plurality of longitudinal slots extending from the open end, and a plurality of elastic pieces arranged between the longitudinal slots; the tightening member is inserted in the open end of the clamping sleeve and includes a big-diameter end, a small-diameter end and a conical surface between the big-diameter end and the small-diameter end, the tightening member is further provided with a locking hole penetrating from the big-diameter end to the small-diameter end, the tightening member has its small-diameter end inserted in the open end of the clamping sleeve, the bolt is inserted through the tapered hole of the mounting member, the clamping sleeve, the locking hole of the tightening member and then screwed with a nut, and the elastic pieces are pushed to press against the inner surface of the front fork by the conical surface of the tightening member.