Walk-behind agricultural working machine

摘要

Connection mechanism includes upper and lower links pivotably connected at one end to a machine body and connected at the other end to a working device, and a control unit for controlling a lower limit position of the device. When the device is in a soil-contacting position prior to initiation of desired work, an end portion of the links adjacent the device is located higher than another end portion adjacent the body. The mechanism further includes a base member connected to the body, an arm vertically pivotably connected to the base member, and a connection member connected to the other end of the links for connecting the device. The device is vertically movable by the arm being vertically pivoted with an engaging member guided along an edge of a window formed in the base member.