In accordance with an example embodiment, a work tool control system for a work vehicle, the work tool system comprising at least two hydraulic cylinders, a work tool coupled, directly or indirectly, with the at least two hydraulic cylinders, the work tool configured to move material, a controller, wherein the controller is in communication with the at least two hydraulic cylinders, an operator interface, wherein the operator interface is in communication with the controller, wherein when the controller receives a first signal from the operator interface the controller sends a second signal to the at least two hydraulic cylinders, where the first signal is a vehicle reverse signal and the second signal is a work tool lift signal.

A circle assembly for supporting implement of motor grader is provided. The circle assembly rotates relative to drawbar about rotation axis. The circle assembly includes plate and rim member coupled to plate. The plate defines front section and rear section and includes a ring gear portion defining a plurality of teeth formed integrally therein. A first skirt portion and a second skirt portion integrally and contiguously extend from ring gear portion at rear section. The first skirt portion and second skirt portion are angled relative to ring gear portion in direction of rotation axis. The rim member includes first arm member and second arm member attached to first skirt portion and second skirt portion, respectively, and a circumferential belt portion extending between the first arm member and the second arm member. The belt portion is spaced from and surrounds ring gear member at the front section of the plate.

A motor grader includes an operation apparatus, a front frame, a draw bar swingably attached to the front frame, a first actuator attached to the draw bar, the first actuator moving the draw bar in a lateral direction with respect to the front frame, a second actuator attached to the draw bar, the second actuator moving the draw bar in a direction toward the front frame and a direction away from the front frame, and a controller that causes the first actuator and the second actuator to operate. The controller causes the first actuator and the second actuator to operate based on an operation signal received from the operation apparatus such that a position of the draw bar with respect to the front frame comes closer to a neutral position of the draw bar with respect to the front frame.

A tool bit comprises a shank portion including a cylindrical configuration defining a longitudinal axis, a radial direction, and a circumferential direction, and a working portion including a cylindrical configuration that is concentric with the shank portion and a flat bottom surface.

A drawbar assembly for a motor grader is provided. The drawbar assembly defines a longitudinal axis and includes a first frame member and a second frame member. The first frame member is adapted to be movably coupled to main frame of the motor grader. The first frame member includes a first base member extending along longitudinal axis and a first mating portion bent away relative to first base member to extend transversely relative to longitudinal axis. The second frame member includes a second base member extending along longitudinal axis and a second mating portion bent away relative to second base member to extend transversely relative to longitudinal axis. The second mating portion is configured to mate with first mating portion to form a connection joint therebetween, facilitating the first frame member and second frame member to be conjoined to together support a circle assembly of the motor grader thereunder.

A grader and a blade control method wherein the grader includes: a blade mechanism including a blade; a blade adjusting mechanism including a plurality of adjusting means respectively corresponding to at least two degrees of freedom of the blade, and configured to adjust a spatial position and/or angle of the blade; a blade position detecting mechanism configured to detect a slope parameter for characterizing a spatial position of the blade; a motion trajectory library configured to store motion functions of the plurality of adjusting means respectively when different operation conditions and/or different grades are switched; a controller configured to call a corresponding motion function in the motion trajectory library according to a set operation condition and a required slope, and control at least one of the plurality of adjusting means according to a position parameter of the blade and the motion function.

A grading machine and method for grading a ground surface including a machine body, a drawbar frame coupled to the machine body, a movable grading device coupled to the drawbar frame, a drive arrangement coupled to the drawbar frame and a circle member, a pitch frame coupled to the circle member, a movable grading device coupled to the pitch frame, a right lift linkage arrangement, a left lift linkage arrangement, a circle member side shift linkage arrangement, a grading device side shift linkage, a pitch actuator, a user interface, and a control system. The control system is configured to receive an input command from the user interface for a target grading device movement and adjust one or more of the right lift actuator, the left lift actuator, the side shift actuator, and the drive arrangement to achieve the target grading device movement using a first control pattern or a second control pattern.

A grading machine include a machine body, a grading blade, at least one grading blade sensor configured to sense a position and orientation of the grading blade, a drawbar connecting the grading blade to the machine body, a drawbar centershift cylinder, a user interface, and a control system. The control system is configured to receive an input from the user interface and position and orient the grading blade and the drawbar to one of a plurality of predetermined maintenance positions based on the input.

A pin for a coupler assembly for rotatably coupling a beam of a circle assembly of a grader machine with a bracket of a moldboard assembly of the grader machine includes a body defining a head portion and a shank portion. The shank portion integrally extends from the head portion. The head portion is adapted to be seated over one or more of the beam and the bracket. The shank portion is adapted to pass through the beam and the bracket to rotatably couple the beam and the bracket about the shank portion. A grease gallery is defined through the head portion, extending into the shank portion. The body defines multiple grease passages branching out from the grease gallery up to corresponding sections of an outer surface of the shank portion where the beam and the bracket are correspondingly adapted to lie in rotatable registration with the shank portion.

A rotary frame includes a first connecting member of the rotary frame has an arc-shaped concave part. Each second connecting member is non-coplanar with the first connecting member and has a mounting hole. A first reinforcing member is connected between a first end of the first connecting member and one of the second connecting members; and another first reinforcing member is connected between a second end of the first connecting member and the other second connecting member. A second reinforcing member is connected between a middle part of a circumferential edge of the first connecting member and one of the second connecting members; and another second reinforcing member is connected between the middle part of the circumferential edge of the first connecting member and the other second connecting member. Middle regions of the first and second reinforcing members joined to the same second connecting member are separate from each other.