US 2003/0154811 A1 · Vehicle power unit

Abstract

In a vehicle power unit, a main shaft and a counter shaft of a transmission are placed in and taken out through an opening formed on the crankcase. The main shaft and the counter shaft are rotatably held by a single transmission cover fastened to the crankcase and a cylinder block for covering the opening. In addition, the output shaft is provided with an input gear engaged with an output gear provided on a counter shaft 1 and is rotatably supported on the transmission cover by a bearing holding portion formed on the transmission cover via a ball bearing. The counter shaft and the output shaft are connected via a pair of gears, wherein the necessity of increasing the fastening rigidity with respect to the transmission cover is reduced and the accuracy of the position and the size of the mounting positions of the counter shaft and the output shaft is easily secured with the aforementioned power unit.

Claims20

Dependent claims

A vehicle power unit comprising:

a transmission having a single transmission cover;
an engine;
an opening being formed on a storage member for storing the transmission, wherein power of the engine is transmitted to the transmission;
a main shaft and a counter shaft of said transmission that is capable of being taken out and placed in through the opening, said main shaft and said counter shaft being secured on said storage member and rotatably supported by the single transmission cover for covering said opening;
an output shaft being connected to said counter shaft, wherein said output shaft is rotatably held by a holding portion formed on said transmission cover;
an output gear being provided on said counter shaft;
and
an input gear being provided on said output shaft, said output gear operatively engaging said input gear.

5 more elements

Dependencies are inferred from the claim text.

Vehicle power unit

Life of this patent

Vehicle power unit

Life of this patent

Abstract

Claims20