Patent ID: 6349544
Filing Date: 2002-02-26
Classification: B60K,F16H

Abstract:
An axle driving apparatus comprising:a housing, an inner space of said housing serving as a fluid sump; a center section disposed in said housing, said center section forming therein a pair of fluid passages serving as a closed circuit fluidly connecting a hydraulic pump and a hydraulic motor with each other; a movable swash plate disposed in said housing for adjusting an amount of fluid discharged from said hydraulic pump; a pivotal control arm disposed in said housing for operating said swash plate, said control arm including a fluid groove in constant communication with said fluid sump; a pair of orifices, wherein either of said orifices is brought into communication with said fluid groove of said control arm when said control arm is located in a certain range, and a pair of check valves, each of said check valves being interposed between each of said orifices and each of said fluid passages, wherein said check valves allow fluid to flow from said pair of oil passages to said pair of orifices, and stop flow of fluid from said pair of orifices to said pair of oil passages.