Boat propeller with adjustable blades for adjusting the pitch thereof

摘要

A boat propeller comprises a hub formed of a first cylindrical member and a second cylindrical member detachably joined together. The second cylindrical member comprises a plurality of insertion cavities formed in the second cylindrical member, an end of each of the insertion cavities having a plurality of receptacle members. The boat propeller also comprises a plurality of blades equal in number to the number of insertion cavities. Each blade comprises a blade piece portion and an adjustment member, a tip of the adjustment member comprising a positioning member such that the positioning member makes contact with at least one of the receptacle members when the adjustment member is inserted into the corresponding insertion cavity. The positioning member of the adjustment member is selectively matched with one or more of the receptacle members for adjusting a pitch of the blades.