A method and system for determining working heights independent of the type of coupling of a plurality of agricultural attachments using a sensor assembly is disclosed. The sensor assembly includes at least one sensor for recording measured data and a control assembly. The attachments may be coupled to an agricultural production machine by an equipment interface using different types of coupling. The attachments are temporarily coupled to the agricultural production machine using the different types of coupling. The control assembly determines the working heights independent of the type of coupling of the differently coupled attachments when in a coupled state by using the same sensor. The control assembly displays the working heights determined independent of the type of coupling by means of the agricultural production machine, and/or uses them to control and/or regulate the agricultural production machine.

A work vehicle includes a travelling vehicle body; a work machine mounted on a rear portion of the travelling vehicle body to be capable of being lifted and lowered; a control unit for controlling lifting and lowering of the work machine; and a rear sensor provided on the rear portion of the travelling vehicle body and configured to detect an object present behind the travelling vehicle body. The control unit may be configured to set a regulation height based on a height where the rear sensor detects the work machine while the work machine is lifted and then regulate lifting of the work machine during work in such a manner that a height of the work machine is kept less than or equal to the regulation height.

A spring is combined between the chassis and the pair of links arms. An electric actuator is combined between the chassis and the pair of links arms for compressing the spring with the assistance of gravity on a downward stroke of the electric actuator while lowering the pair of link arms, and wherein the pair of link arms are raised by an outward stroke of both the electric actuator and the spring.

A cultivator function is coupled with a scraper function in a single implement such that the cultivator portion and the scraper portion of the combination farming implement, when attached to a vehicle, can be mechanically and remotely changed out at any time. The cultivator portion and the scraper portion of the combination farming implement are positioned on opposite sides of a rotating framework, such that the combination farming implement can be mechanically and remotely rotated during use in the field, thus enabling the performance of both the cultivator function and the scraper function without a vehicle operator ever leaving the vehicle.

A tractor includes a three-point link mechanism to which a work apparatus to be attached so as to be able to move upward and downward, a hydraulic drive to perform a swing operation to swing the three-point link mechanism, a load receiver to swing in response to a tow load being applied from the work apparatus when the work apparatus performs ground work while being towed by the vehicle body, and a link mechanism to transmit an amount of operation for the swing operation to the hydraulic drive according to an amount of swing of the load receiver. The link mechanism includes, at a most upstream position, an interlocking swing arm to swing in conjunction with the swing of the load receiver about a swing axis that is different from a swing axis of the load receiver, the load receiver includes a first portion to press the interlocking swing arm that includes a second portion contactable with the first portion so to be pressed by the first portion, and a contact position of the first and the second portions.

A three-point hitch for an agricultural tractor includes a lift arm, a lower link arm, and a lift spindle disposed between the lift arm and link arm for transmitting a pivoting movement performed on the lift arm to the link arm. The lift spindle includes a first fastening section on the lift arm and a second fastening section on the link arm. An elongated hole is formed in the second fastening section along a longitudinal direction of the lift spindle, and a mounting pin extends through a fastening opening in the link arm and is mounted in the elongated hole. At least two spaced apart locking regions are formed along the elongated hole for receiving a shaped feature on the mounting pin. A movement of the link arm along the elongated hole is blocked when the shaped feature is received in one of the locking regions.

A coupling device for attaching a power lift of a tractor to an attachment includes a link mounting region having coupling units for the articulation of an upper link and two lower links of the power lift, and an apparatus mounting region for fixing the attachment. A coupling unit assigned to the upper link is movable in a translatory manner in a vertical direction running perpendicular to a transverse direction. The coupling units are movably disposed on a device base of the coupling device, and the coupling units assigned to the two lower links are movable in a translatory manner in the transverse direction.

A traveling vehicle includes a controller to control a posture of a work machine via a connector. The controller observes whether a farm field surface on which the traveling vehicle travels and the work machine maintain a predetermined positional relationship therebetween, and controls the posture of the work machine when a positional relationship between the farm field surface and the work machine changes from the predetermined positional relationship, so that the positional relationship thus changed is reset to the predetermined positional relationship.

The present invention relates to mobile machinery such as an agricultural tractor comprising a three-point hitch 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. The disclosed invention modifies and improves the conventional three-point hitch in use today. The disclosed invention modifies the three-point hitch 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.

A tow head for agricultural implements, particularly those intended for the distribution of seeds, composts, fertilizers, herbicides, pesticides, or fungicides in the field, is designed to promote a structural reinforcement that heightens resistance and, accordingly, improve the conditions of operation of these agricultural equipment. More particularly, a tow head for agricultural implements is formed by a telescopic center bar from which angularly designed sidebars are projected from the coupling end, and which are connected to the respective side wings of the structural chassis of the agricultural implement, and the sidebars are endowed with a reinforcement that is fixed along at least part of the longitudinal length of each sidebar.