In a hydraulic adjustment device, preferably for transverse adjustment of the lower links of a three-point power lift on an agricultural machine, with two selectively controllable hydraulic cylinders and a hydraulic control circuit for actuating them, a control circuit with a pressure control device for generating an adjustable control pressure in dependence on an electrical control signal is provided, and a pressure-controlled changeover valve is connected to the pressure control device and, when a first control pressure value is applied, assumes a first switching position in which a first cylinder is connected to a pressure sink and the second cylinder is connected to a pressure source, and, when a second control pressure value is applied which is higher than the first control pressure value, assumes a second switching position in which the first cylinder is connected to the pressure source and the second cylinder is connected to the pressure sink.

An agricultural vehicle combination including an agricultural tractor, which is operated using a main drive unit, and an ancillary drive unit, which is attached removably to the agricultural tractor by a three-point hitch, and which has an auxiliary axle that can be driven by an ancillary unit including at least one of a combustion engine and an electric motor.

An agricultural vehicle combination including an agricultural tractor, which is operated using a main drive unit, and an ancillary drive unit, which is attached removably to the agricultural tractor by a three-point hitch, and which has an auxiliary axle that can be driven by an ancillary unit including at least one of a combustion engine and an electric motor.

A multi-coupling assembly includes a first female coupler and a second female coupler whereby the female couplers are independently operable. Rotation of a rotational lever moves one of the female couplers from the coupling position to the release position without affecting a connection state of the other of the female couplers. Such independent operation of the female couplers is achieved by rotating cams that are configured such that when one of the cams rotates to interact against its respective female coupler, the other of the cams does not act on its respective female coupler. Pressure relief valves are operated such that internal pressure within a female coupler is released prior to the female coupler reaching the release position during a disconnection operation of the male coupler, and prior to the female coupler reaching the coupling position during a connection operation of a male coupler.

An apparatus for connecting an implement to a three point hitch of mobile machinery comprises two frameworks, a first framework and a second framework. The first framework is disposed in a first plane and comprises at least two parallel, vertically-spaced apart, laterally extending rails. There are three attachments supported by the first framework for attachment to the three-point hitch. The second framework is slidable generally in the plane of the first framework and is mounted on the rails to slide laterally along the rails. At least two connectors are supported by the slidable second framework for connecting the second framework to an implement that can be pulled or pushed by the mobile machinery. A driver is connected to the first framework and connected to the second framework for driving the second framework laterally back and forth along the rails of the first framework.

An apparatus for connecting an implement to a three point hitch of mobile machinery comprises two frameworks, a first framework and a second framework. The first framework is disposed in a first plane and comprises at least two parallel, vertically-spaced apart, laterally extending rails. There are three attachments supported by the first framework for attachment to the three-point hitch. The second framework is slidable generally in the plane of the first framework and is mounted on the rails to slide laterally along the rails. At least two connectors are supported by the slidable second framework for connecting the second framework to an implement that can be pulled or pushed by the mobile machinery. A driver is connected to the first framework and connected to the second framework for driving the second framework laterally back and forth along the rails of the first framework.

A system includes a tractor comprising a lifting hitch, and an implement comprising an implement frame carried by the lifting hitch. The implement frame has an integrated elongate toolbar carrying at least one row unit. A sensor is configured to sense a position of the at least one row unit relative to the ground. A control system is configured to receive a signal related to the sensed position of the at least one row unit relative to the ground and cause the lifting hitch to raise or lower a portion of the implement frame connected to the lifting hitch relative to the tractor based at least in part on the signal. Control systems and related methods are also disclosed.

A working machine coupler device includes a top linkage, a lower linkage, a detachable frame including a second upper coupler to be coupled to a first upper coupler, and a second lower coupler to be coupled to a first lower coupler, and a top linkage controller. The second upper coupler is coupled to the first upper coupler when the lower linkage is pivoted upward, and the first lower coupler moves toward and be coupled to the second lower coupler when a front portion of the working machine is moved upward, and the top linkage controller regulates the stretching and shortening of the top linkage to hold the detachable frame inclining backward, and allows the top linkage to be shortened until the working machine takes a working posture after the lower linkage is pivoted downward from a state where the front portion of the working machine is lifted.

A working machine coupler device includes a top linkage, a lower linkage, a detachable frame including a second upper coupler to be coupled to a first upper coupler, and a second lower coupler to be coupled to a first lower coupler, and a top linkage controller. The second upper coupler is coupled to the first upper coupler when the lower linkage is pivoted upward, and the first lower coupler moves toward and be coupled to the second lower coupler when a front portion of the working machine is moved upward, and the top linkage controller regulates the stretching and shortening of the top linkage to hold the detachable frame inclining backward, and allows the top linkage to be shortened until the working machine takes a working posture after the lower linkage is pivoted downward from a state where the front portion of the working machine is lifted.

An attachment (1) for attaching to a towbar (3) of a towable apparatus (5), for example, a mower for hitching the towable apparatus (5) to either an agricultural tractor or a road vehicle comprises a mounting shaft (10) for securing to the towbar (3), and carrying a first gearbox (12). A second gearbox (14) is pivotally coupled to the first gearbox (12) about a vertical pivot axis (15) through which drive is transmitted from the second gearbox (14) to the first gearbox (12). A carrier housing (24) is rigidly secured to the second gearbox (14) and carries a first hitch (30) for hitching to a complementary hitch mechanism of a road vehicle, and a second hitch (38) for coupling a tractor (7). The second gearbox (14) is pivotal relative to the first gearbox (14) about the main pivot axis (15) between a first state with the first hitch (30) ready for hitching to the road vehicle, and a second state with the second hitch (38) ready for hitching to the tractor (7).