Patent ID: 7434645
Filing Date: 2008-10-14
Classification: B62K

Abstract:
1. A structure for supporting a swing arm in a motorcycle, in which a power unit mounted on a vehicle body frame swingably supports a front portion of a swing arm via a first pivot member of a cylindrical shape coaxial with an output shaft and a second pivot member coaxial with the first pivot, a rear portion of the swing arm journals a rear wheel, the power unit including an engine and a reduction transmission apparatus that includes the output shaft for supplying a driving force to the rear wheel, the reduction transmission apparatus is provided for transmitting an output of the engine through speed reduction, comprising: an outer end portion of said output shaft projecting outwardly from the swing arm and being operatively connected to a final transmission member of the reduction transmission and being capable of removal or insertion in an axial direction, while being incapable of relative rotation about an axis; said first pivot member being removably mounted on the power unit; and said second pivot member being removably secured to the power unit or the swing arm, wherein the second pivot member is coaxial with the first pivot member and the first and second pivot members are disposed coaxially with the output shaft, and wherein an end portion of the first pivot member adjacent to the gear case includes a flange portion that is removable joined to the transmission apparatus such that the first pivot member can be removed by removing the flange portion and sliding the first pivot member in the axial direction.