An agricultural work vehicle according to an aspect of the present invention, which can adaptively adjust the velocity profile of the hitch according to the weight of the work machine, is characterized by comprising: a hitch on which an work machine is mounted; a weight calculation unit that calculates the weight of the work machine when the work machine is lifted following a first lift of the hitch; and a hitch controller that firstly lifts the hitch according to a reference velocity profile comprising a constant-velocity section (T) and, when calculation of the weight of the work machine is completed, generates an updated velocity profile comprising acceleration sections (a1, a2), constant-velocity sections (b1, b2), and deceleration sections (c1, c1) according to the weight of the work machine, and secondly lifts the hitch according to the updated velocity profile.

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.

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.

Disclosed is a small-scale land prep and maintenance equipment system that includes a universal frame configured for use with multiple implements. The universal frame includes a tongue element that includes an implement connection point (such as a through-hole or threaded hole) configured for receiving a saddle and bolt aspect of an implement. Advantageously, the implement connection point of the universal frame and the saddle of the implement provide for a robust and rigid connection between the universal frame and an implement while also enabling quick changeover of landscaping implements. Moreover, because the universal frame may be used on any number of implements, the cost of an integrated frame in each implement is avoided.

Disclosed is a small-scale land prep and maintenance equipment system that includes a universal frame configured for use with multiple implements. The universal frame includes a tongue element that includes an implement connection point (such as a through-hole or threaded hole) configured for receiving a saddle and bolt aspect of an implement. Advantageously, the implement connection point of the universal frame and the saddle of the implement provide for a robust and rigid connection between the universal frame and an implement while also enabling quick changeover of landscaping implements. Moreover, because the universal frame may be used on any number of implements, the cost of an integrated frame in each implement is avoided.

A subsoil tool for ameliorating soil compaction having a shank attached to a toolbar of a tractor, wings on forward wing links pivotally engaged to the shank, and following wings on a wing rod pivotally engaged with the forward wing link. The forward wing links are positioned near the bottom of the shank in front of the rear of the shank. The wing rod is positioned behind the shank. A drive box having a hydraulic cylinder is engaged to the toolbar and pivotally engaged with the wing rod. In use, a portion of the subsoil tool may be inserted below a surface of the soil, the height of the subsoil tool may be adjusted, the subsoil tool may be rotated, and the hydraulic cylinder may be cycled to move the forward wings and following wings.

A subsoil tool for ameliorating soil compaction having a shank attached to a toolbar of a tractor, wings on forward wing links pivotally engaged to the shank, and following wings on a wing rod pivotally engaged with the forward wing link. The forward wing links are positioned near the bottom of the shank in front of the rear of the shank. The wing rod is positioned behind the shank. A drive box having a hydraulic cylinder is engaged to the toolbar and pivotally engaged with the wing rod. In use, a portion of the subsoil tool may be inserted below a surface of the soil, the height of the subsoil tool may be adjusted, the subsoil tool may be rotated, and the hydraulic cylinder may be cycled to move the forward wings and following wings.

A device for influencing vertical dynamics of an agricultural vehicle includes a mass mounted on the agricultural vehicle, a positioning system for controlling movement of the mass in vertical direction, a sensor device configured to detect a surface profile of an upcoming vehicle path segment, and an electronic control unit adapted to calculate an expected disturbance input for the upcoming vehicle path segment based on the detected surface profile. The electronic control unit operably controls the positioning system to execute a compensation movement of the vehicle that reduces the expected disturbance input by means of the mass.

A device for influencing vertical dynamics of an agricultural vehicle includes a mass mounted on the agricultural vehicle, a positioning system for controlling movement of the mass in vertical direction, a sensor device configured to detect a surface profile of an upcoming vehicle path segment, and an electronic control unit adapted to calculate an expected disturbance input for the upcoming vehicle path segment based on the detected surface profile. The electronic control unit operably controls the positioning system to execute a compensation movement of the vehicle that reduces the expected disturbance input by means of the mass.

An inner oil passage (45) is formed inside a slidable spool (22). The slidable spool (22) defines, in its circumferential face, a first opening (46), a second opening (47) and a third opening (48). The first opening (46), the second opening (47) and the third opening (48) are communicated to the inner oil passage (45). When the slidable spool (22) is switched to a floating position (F), the first the first opening (46) is aligned with a first port end portion (25a), the second opening (47) is aligned with a second port end portion (26a), and the third opening (48) is aligned with a fourth port end portion (24a), respectively, and a first cylinder port and a second cylinder port are communicated to a tank port (24) via the inner oil passage (45).