Adjustable drawbar and circle support assembly for a motor grader
AssigneeCaterpillar Inc.
InventorJeff Slunder
Life of this patent
Estimating the term…
Abstract
A motor grader is provided with an adjustable drawbar and circle support assembly. The assembly includes a circle support for mounting a moldboard or blade for rotation about an upright axis, and an extensible and retractable drawbar having one end associated with the circle support and another end adapted for pivotal connection to the main frame of the motor grader. The drawbar is preferably hydraulically actuatable to move the circle support fore and aft along the longitudinal length of the motor grader main frame to provide longitudinal adjustment of the grader blade.
Claims15
An adjustable drawbar and circle support assembly for a motor grader, comprising:
- a circle support adapted for mounting a blade thereto for rotation about an upright axis;
- and
- a hydraulically extensible and retractable drawbar having one end associated with said circle support and another end adapted for pivotal connection to a main frame of a motor grader, said drawbar being extensible and retractable along its longitudinal axis,
- whereby said circle support is adapted for fore and aft movement along a longitudinal axis of the motor grader main frame by hydraulic extension and retraction of said drawbar.
An adjustable drawbar and circle assembly for a motor grader, comprising:
- a circle support adapted for mounting a blade thereto for rotation about an upright axis;
- an extensible and retractable drawbar having one end associated with said circle support and another end adapted for pivotal connection to a main frame of a motor grader, said drawbar being extensible and retractable along its longitudinal axis;
- and
- a manually operable actuator located remote from said drawbar and circle support to provide operator selected extension and retraction of said drawbar,
- whereby said circle support is adapted for fore and aft movement along a longitudinal axis of the motor grader main frame by remote operator selected extension and retraction of said drawbar.
A motor grader, comprising:
- a moveable main frame including steering wheels proximate a front end thereof and power drive wheels, a traction chassis and a power plant proximate a rear end thereof;
- an operator's cab supported on said main frame forward of said traction chassis;
- a circle support mounted for movement relative to said main frame and adapted for mounting a blade thereto for rotation about an upright axis;
- an extensible and retractable drawbar having one end associated with said circle support and another end pivotally connected to said main frame, said drawbar being extensible and retractable along its longitudinal axis;
- and
- a manually operable actuator located within said operator's cab to provide operator selected extension and retraction of said drawbar,
- whereby said circle support is adapted for fore and aft movement along a longitudinal axis of said motor grader main frame by operator selected extension and retraction of said drawbar from within said operator's cab.
A method of adjusting a drawbar and circle support assembly of a motor grader, comprising:
- mounting a drawbar and circle support assembly for movement relative to a main frame of a motor grader;
- moving said circle support fore and aft along a longitudinal axis of the motor grader main frame by remote operator selected extension and retraction of said drawbar along its longitudinal axis.
Dependencies are inferred from the claim text.