Patent ID: 6074014
Filing Date: 2000-06-13
Classification: B60B,B62K

Abstract:
A tricycle front hub assembly comprising:a crank rod;a hub having a rectangular through hole; anda fastening device located in said rectangular through hole for fastening the crank rod of the tricycle;wherein said rectangular through hole is provided in an inner wall of respective ends thereof with two recesses opposite in location to each other, and two arresting protuberances;wherein said fastening device is composed of a first fastening portion and a second fastening portion, said first fastening portion and said second fastening portion each being provided with a protuberance corresponding in location to and engageable with said recesses of said rectangular through hole, and each having a depression respectively engageable with said arresting protuberances of said rectangular through hole;wherein said crank rod is put through said rectangular through hole such that said crank rod is held securely by said first fastening portion and said second fastening portion, and that said protuberances of said first fastening portion and said second fastening portion are engaged with said recesses of said rectangular through hole, and said depressions of said first fastening portion and said second fastening portion are engaged with said arresting protuberances of said rectangular through hole;wherein said first fastening portion is provided with a curved slot, and said second fastening portion is provided with a curved slot corresponding in location, size and shape to said curved slot of said first fastening portion;wherein said crank rod is provided with a curved portion; andwherein said crank rod is held securely by said first fastening portion and said second fastening portion such that said curved portion of said crank rod is located in said curved slots of said first fastening portion and said second fastening portion.