An electric drive mower includes an electric traction drive as well as electric drive to the cutting units carried on the mower. A hybrid electric drive system supplies electric power to these motors. The electric drive system includes a genset (an internal combustion engine driving an electrical power generating device such as an alternator) and a battery pack which supply the electric power to the electric motors either individually or jointly. A switch may be provided to permit all battery operation of the mower. A steering system having a non-powered pump is used to effect steering of the steerable wheel(s) of the mower to avoid having a heated oil damage the turf in the event of a leak. A crankshaft driven by a single electric drive motor is linked to all the cutting units through various crankarm and connecting rod linkages to lift and lower the cutting units in a timed manner.
申请公布号
WO9728681(A3)
申请公布日期
1997.11.20
申请号
WO1997US01853
申请日期
1997.02.07
申请人
THE TORO COMPANY;GUST, JACKIE, R.;METHENY, ERIC, A.;LONN, DANA, R.;TETZLAFF, HEINRICH, F.;PAVLIK, DENNIS, J.;ANDERSON, MARK, S.
发明人
GUST, JACKIE, R.;METHENY, ERIC, A.;LONN, DANA, R.;TETZLAFF, HEINRICH, F.;PAVLIK, DENNIS, J.;ANDERSON, MARK, S.