RATCHET BICYCLE HUB ASSEMBLY

摘要

A bicycle hub assembly includes a hub with an axle extending therethrough. A socket is connected to the hub and has a base connected thereto. The base has multiple pawl recesses and each pawl recess has two receiving portions. A ratchet unit has multiple pawls, multiple resilient members and a toothed ring. The pawls each have a first protrusion and a second protrusion respectively extending from one end thereof. A restriction slot is defined in one side of the pawl. The two ends of the resilient member are respectively received in the two ends of the pawl recess. Each resilient member has a curved contact portion which contacts the restriction slot. The toothed ring is located in the hub and the pawls are engaged with the toothed ring. When the first protrusion is worn out, the second protrusion is engaged with the ratchet teeth and the hub assembly works normally.

主权项

1. A bicycle hub assembly comprising:
a hub being a hollow member and an axle extending centrally through the hub, a reception recess defined in one end of the hub; a socket having gear cluster connected thereto, a stepped portion formed on an outer periphery of the socket and a base connected to the stepped portion, the base having multiple pawls recesses and each pawl recess having a first receiving portion and a second receiving portion in two ends thereof, and a ratchet unit having multiple pawls, multiple resilient members and a toothed ring, the pawls each having a connection end at a first end thereof, a first protrusion and a second protrusion respectively extending from a second end of each pawl, a restriction slot defined in a side of the pawl and located in opposite to the first and second protrusions, the connection ends of the pawls being respectively engaged with the first receiving portions, the resilient members each having a first end a second end, the first end of each resilient member located in the second receiving portion and the second end of each resilient member having a curved contact portion which contacts the restriction slot, the base having a fixing member which stops the pawls, the toothed ring located in the reception recess and having multiple ratchet teeth, the socket connected to one end of the hub and mounted to the axle, the pawls engaged with the ratchet teeth.