The disclosure relates to a method for adjusting an orientation angle of an agricultural implement. The method comprising arranging a hitch such that an upper link and at least one lower link is articulated to a support structure of the utility vehicle; and adjusting the orientation angle based on a target length of the upper link, wherein the target length of the upper link is determined as a function of the orientation angle and as a function of a lower link angle.

A method for determining a physical parameter of an adjustable upper link of a three-point hitch during a working operation thereof includes providing a lower link of the three-point hitch and an implement attachable to the upper and lower links of the three-point hitch. The method includes generating calibration data prior to the working operation of the three-point hitch, where the calibration data defines a relationship of a length of the upper link to an upper link angle defined between the upper link and a reference line. Moreover, the calibration data is used to determine a physical parameter of the adjustable upper link during the working operation.

A work vehicle (1) comprises a coupling apparatus (18) for coupling an attachment to the forward end (8) of the work vehicle (1). The coupling apparatus (18) comprises a three point linkage mechanism having a pair of lower coupling elements (19) and an upper coupling element (25). A first carrier element (22) is pivotally coupled to a forward chassis part (14) of the work vehicle (1) by a pair of main transverse pivot shafts (35) which define a main transverse pivot axis (33). A second carrier element (23) carries the lower coupling elements (19) and is pivotally coupled to the forward chassis part (14) about the main transverse pivot axis (33) and about a main longitudinal pivot axis (45). A main longitudinal pivot shaft (46) extending rigidly from the second carrier element (23) pivotally engages the first carrier element (22) and terminates in a swivel bearing (50) which pivotally and swivelably couples the main longitudinal pivot shaft (46) to an intermediate transverse pivot shaft (54) which also defines the main transverse pivot axis (33), so that the second carrier element (23) and the first carrier element (22) are pivotal about the main transverse pivot axis (33), and the second carrier element (23) is pivotal about the main longitudinal pivot axis (45) to facilitate upward and downward movement of an attachment coupled to the coupling apparatus (18) about the main transverse pivot axis (33) and tilting movement of the attachment about the main longitudinal pivot axis (45).

A work vehicle, comprises: an operation section occupiable by an operator; a cabin accommodating the operation section; left and right suspension mechanisms via which a body of the work vehicle supports a left portion and a right portion of the cabin; and left and right lateral rods configured to allow the cabin to move upward and downward relative to the body and restrain the cabin from moving leftward and rightward relative to the body.

An autonomous agricultural system comprising an implement configured to perform an agricultural operation. The system additionally comprises an autonomous power unit for autonomously propelling the implement. The system further comprises a coupling assembly configured to connect the implement to the power unit. The coupling assembly provides at least six degrees of freedom of movement between the implement and the power unit.

A coupling device includes: a first connector that connects to a work vehicle; a second connector that connects to a work device; an actuator that changes a connecting position of at least one of the first connector and the second connector; and a control device that controls the actuator.

Disclosed is a device for hitching and lifting an agricultural tool, including a frame fastened to the agricultural machine, a first arm articulated on the frame with a first tool hitch at one end, at least one first jack, the cylinder or rod being connected to the frame, the other connected to the arm, the jack enabling moving the arm so the extent of the travel of the jack allows the end of the arm bearing the hitch to successively pass through a first (minimum low) position, a second (maximum high) position, and a third (retracted) position, of the supply of the jack, a unit for detecting the position of the end of the arm to deactivate the supply of the jack when the end reaches the second position, and a bypass controller for bypassing the controller of the detection unit, to reactivate the supply of the jack.

Coupling apparatus (80) for coupling a mower (3) to a front three-point linkage of a tractor comprises a mounting element (17) for coupling to the three-point linkage and a carrier element (19) to which the mower (3) is coupled. A linkage mechanism (20) comprising upper link members (81) and a lower link member (23) couples the carrier element (19) to the mounting element (17). The lower link member (23) is pivotally coupled to the mounting element (17) about a first lower pivot axis (30). A pair of take-up springs (45) act between the lower link member (23) and the mounting element (17) to take up a portion of the weight of the mower (3). The take-up springs (45) are coupled between corresponding anchor elements (60) and corresponding anchor brackets (49) on the lower link member (23). The anchor elements (60) are carried on respective compensating arms (88), which in turn are pivotal on pivot shafts (53) carried on the mounting element (17). Actuator arms (89) acting between the lower link member (23) and the compensating arms (88) urge the anchor element (60) upwardly and downwardly as the carrier element (19) moves upwardly and downwardly for controlling the turning moment induced by the take-up springs (45) in the linkage mechanism (20), in order to maintain the effective weight of the mower (3) bearing on the ground substantially constant.

A method is provided for determining a weight of a payload carried by a support structure of an agricultural utility vehicle via a hitch. The hitch includes at least one upper link and at least one lower link. The method includes determining the weight based on at least one of (1) an angle between the upper link and a vehicle horizontal, and (2) a holding force that arises at a connection between the upper link and the payload and is effective along the upper link.

A conventional three point hitch of an agricultural tractor for the connection and use of working implements cultivating or excavating the earth and other duties involved in the industry of farming or grading excavation is modified by adding extending and retracting implement-actuators attachable to the existing bottom-lift-arms, therefore supplanting, but still using the existing bottom-lift-arms on the three-point hitch. The implement-actuators assist the implement in correcting the implements centerline when the tractor centerline is off a predetermined centerline path. In addition, the extending of the implement-actuators proportionally, inversely and simultaneously can correct the pivot point of the implement to match the pivot point of the tractor while the tractor performs turns during the working use of the implement.