Agricultural combine

An agricultural combine, comprising:

• a power source;
• a left and a right propulsion track;
• a power transmission control for controlling energy transfer from said power source to each of said left and right propulsion tracks;
• a shaft supported in a housing mounted in said working vehicle;
• a lever for rotating said shaft;
• a left and a right slider, each designed to slide on said shaft along said shaft's axial line;
• a left and a right speed and direction changing means linked respectively to said left and right sliders for controlling the speed and direction of said crawler assemblies, characterized in that said shaft and said left and right sliders are moved as one body by said lever whereby said left and right speed and direction changing means are moved at the same time;
• a main slider on said shaft within said housing;
• a rotatable steering control member;
• means for moving said main slider in response to rotation of said steering control member for moving said left and right sliders so they affect said left and right speed and direction changing means differently in response to rotation of said shaft for controlling the relative speed and direction of said left and right crawler assemblies independently for turning said working vehicle;
• an hydraulic power transmission for each of said left and right propulsion tracks characterized in that movement of said power transmission control results in an equal change in motion for each of said left and right propulsion tracks;
• a belt for transmitting the driving force of said power source to a working section;
• a tension roller on a pivoted support arm for pressing on said belt midway between said power source and said working section;
• a clutch motor for moving said pivoted support arm to move said tension roller into and out of engagement with said belt;
• and
• a mechanical linkage between said clutch motor and said pivoted support arm for causing the movement of said pivoted support arm in response to said clutch motor to be fast until said tension roller touches said belt and said movement becoming gradually slower after said tension roller touches said belt.

An agricultural combine, comprising:

• a working section including a hulling machine mounted on a floor of said combine, a cylindrical screw crop transport and a grain sorter;
• said grain sorter comprising a front grain sorting plate and a rear grain sorting plate;
• and
• said rear grain sorting plate includes a first grain flowing plate to take out sorted grains;
• a power source;
• a left and a right propulsion track;
• a power transmission control for controlling energy transfer from said power source to each of said left and right propulsion tracks;
• a shaft supported in a housing mounted in said working vehicle;
• a lever for rotating said shaft;
• a left and a right slider, each designed to slide on said shaft along said shaft's axial line;
• a left and a right speed and direction changing means linked respectively to said left and right sliders for controlling the speed and direction of said crawler assemblies, characterized in that said shaft and said left and right sliders are moved as one body by said lever whereby said left and right speed and direction changing means are moved at the same time;
• a main slider on said shaft within said housing;
• a rotatable steering control member;
• means for moving said main slider in response to rotation of said steering control for moving said left and right sliders so they affect said left and right speed and direction changing means differently in response to rotation of said shaft for controlling the relative speed and direction of said left and right crawler assemblies independently for turning said agricultural combine.