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 gravel recapturing and sifting apparatus for attachment to a vehicle on a roadway includes a framework that includes a mounting portion selectively coupled to a front of the vehicle and a mounting boom having a proximal end attached to the mounting portion and which extends rearwardly alongside the vehicle. The apparatus includes at least one wheel assembly coupled to an outer face of the mounting boom and being outwardly offset relative to the outer face, the at least one-wheel assembly including a wheel having a plurality of tines and that is rotatable when actuated. The tines are spaced apart and radially arranged so as to kick up and urge gravel in a direction toward the mounting boom while allowing grass and weeds to pass through in an opposite direction.

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.

A method for automatically guiding a motor grader includes receiving a desired final grade for a worksite and generating a steering path for steering the motor grader across the worksite and moldboard control instructions for actuating a moldboard of the motor grader as the motor grader moves across the worksite based at least in part on the desired final grade, at least one steering performance metric of a steering system of the motor grader, and at least one moldboard performance metric of a moldboard system of the motor grader. Moreover, the method includes receiving an input indicative of a ground speed of the motor grader. Additionally, the method includes controlling the steering system according to the steering path and the moldboard system according to the moldboard control instructions when the ground speed is within a threshold speed range.

A motor grader having ride control for dampening machine bounce using a DCM assembly rotatably coupled to and suspended from a frame of the motor grader is disclosed. Each lift cylinder for the DCM may have an associated ride control circuit with an accumulator, a ride control conduit fluidly connected to a carry end of the lift cylinder and having a flow restriction element, and a ride control accumulator valve fluidly connected to the accumulator and the ride control conduit and operable to either block or allow fluid communication between the carry end and the accumulator through the flow restriction element. Each rid control circuit may also include a head end valve fluidly connected to between the head end of the lift cylinder and a low pressure fluid reservoir and operable to block or allow fluid communication between the head end and the low pressure fluid reservoir.

Detection accuracy of a device for obtaining a position of a blade is improved. A motor grader includes an antenna for reception of a satellite position determination signal arranged in a roof portion of a cab, a first IMU mounted on the cab, a second IMU mounted on a draw bar, a rotation angle sensor that detects an angle of rotation of a swing circle with respect to the draw bar, an inclination angle sensor that detects an angle of inclination of a blade with respect to the swing circle, and a controller. The controller obtains the position of the blade in a global coordinate system based on the satellite position determination signal received by the antenna and results of detection by the first IMU, the second IMU, the rotation angle sensor, and the inclination angle sensor.

A work machine is provided with grade control capability using an imaging system, e.g., rather than GPS. The work machine includes at least one work implement for working at least part of a terrain, and first sensors (e.g., cylinder sensors) generate signals corresponding to positions of the work implement. Second sensors (e.g., stereo cameras) generate signals corresponding to positions of representative features of the terrain (e.g., curbs) in a field of view. A controller receives the signals and determines in a local reference system independent of a global reference system: first position information corresponding to the work implement; and second position information corresponding to the representative features. According to a selected control mode, target parameters for the work implement are determined based on the second position information corresponding to the representative features, and output signals are generated corresponding to a difference between the first position information and the target parameters.

In a motor grader, a total drawbar position may be determined based on signals from various sensors on a drawbar-circle-moldboard (DCM) assembly. The sensors can include rotational sensors for one or both lift arm angles, and one or both yoke primary angles in combination with sensors detecting lengths of the lift cylinders. The sensor information may be used to calculate roll, pitch and yaw angles of the drawbar relative to a frame of the motor grader.

A strut assembly for coupling an implement to a frame of a machine is provided. The strut assembly includes a first elongated member configured to couple to the frame of the machine. The strut assembly further includes a second elongated member slidably disposed within the first elongated member. The second elongated member is configured to couple to the implement. The strut assembly further includes a shear system configured to engage the second elongated member with the first elongated member. The shear system includes a first shear pin configured to be inserted through a first opening defined in the first elongated member and a second opening defined in the second elongated member. The first shear pin includes a first fracture zone positioned within a gap defined between the first elongated member and the second elongated member.

A system for a grading machine includes a lift cylinder sensor to measure a position or movement of a lift cylinder, which is coupled to a drawbar. The drawbar is coupled to a circle. The circle is coupled a blade carrier assembly, and the blade carrier assembly is coupled to a blade. The system also includes a drawbar sensor to measure a position or movement of the drawbar, a circle sensor to measure a position or movement of the circle, a blade carrier assembly sensor to measure a position or movement of the blade carrier assembly, and a blade sensor to measure a position or movement of the blade. A controller receives information from the lift cylinder sensor and one or more of the aforementioned sensors and determines whether one or more wear components is in need of inspection, repair, or replacement.