Patent ID: 8302504
Filing Date: 2012-11-06
Classification: B62M,Y10T

Abstract:
1. Bicycle bottom bracket assembly, comprising: a shaft having a longitudinal axis extending along a predetermined direction and comprising a first end portion and a second end portion; a first crank arm coupled with said first end portion of said shaft; a second crank arm coupled with said second end portion of said shaft; a first bearing having a first ring inserted on said shaft in a position adjacent to said first end portion and a second ring coupled with a first adapter adapted to be associated with a first end of a housing box of the bottom bracket assembly in a bicycle frame; a second bearing having a first ring inserted on said shaft in a position adjacent to said second end portion and a second ring coupled with a second adapter adapted to be associated with a second end of said housing box; and first locking means of said first rings of said first bearing and said second bearing acting on said first rings to prevent the movement of said first rings along said predetermined direction, wherein at least one adapter of said first adapter and said second adapter comprises a first abutment surface adapted to operate in abutment against a front end surface of said housing box and a second abutment surface adapted to operate in abutment against the second ring of at least one bearing between said first bearing and second bearing and wherein the second ring of the other bearing is free to move with respect to the other adapter in both ways of said predetermined direction, and wherein said first locking means includes a shoulder formed on said shaft and arranged between one of said first bearing and said second bearing and an adjacent one of said first crank arm and said second crank arm, said shoulder having an annular side wall that faces towards said one of said first bearing and said second bearing, wherein a first sealing element is arranged axially outwardly of one of said first bearing and second bearing and supported between a corresponding one of said first adapter and second adapter and said shaft, one end of said first sealing element being received in an annular throat formed on said shoulder of said shaft.