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AssigneeHardi International A/S
InventorLars Nejsum
Estimating the term…
The invention relates to trailer (1) for towing after a towing after a towing vehicle, said trailer (1) comprising a frame (3) configured for carrying a load and having a front end with a coupling (5) configured for connecting the trailer (1) to the towing vehicle and allowing that the trailer (1) and the towing vehicle are able to assume mutually angular positions during turning about a turning point O; and a rear end. The trailer also has a separate wheel frame (8) that is connected to the frame (3) by means (10) that allow a relative turning of the frame in relation to the wheel frame (8) during turning of the trailer about the turning point, said wheel frame (8) comprising oppositely arranged wheels (4) that support the trailer (1) during the towing and that are arranged at a distance from each other close to a respective longitudinally extending side of the frame (3); and actuator means (15) for producing said relative turning of the frame (3). The invention is characterized in that the connecting means (10) also allow a controlled transversal movement of the frame (3) in a direction towards or away from said turning point (O) simultaneously with said relative turning of the frame (3); and that the trailer (1)comprises actuator means (15) for producing said transversal movement of the frame (3).
A trailer (1) for towing after a towing vehicle, said trailer (1) comprising:
A trailer according to any one of the preceding claims, characterised in that the wheel frame (8) carries an agricultural implement, in particular a fold boom sprayer (20).
A trailer according to any one of the preceding claims, characterised in that the load is a liquid container.
A trailer according to any one of the preceding claims, characterised in that said wheels (4) are also arranged for turning about a vertical or essentially vertical axis in relation to the wheel frame (8);
A trailer according to any one of the preceding claims, characterised in that the connecting means (10) are constituted of at least two arms (10′, 10″) that are pivotally connected to the frame (3) and the wheel frame (8), respectively, and that constitute a trapezoidal mechanism for controlling the movement of the frame (3) along a curve track in relation to the wheel frame (8).
A trailer according to any one of the preceding claims, characterised in a control unit with a memory that produces, via the actuator means (15), a predetermined fixed setting of the frame (3) in relation to the wheel frame (8) in correspondence with the angle position between the towing vehicle and the wheel frame (8).
A trailer according to any one of the preceding claims, characterised in that the actuator means (15) are connected to the frame (3), to the wheel frame (8) and/or to the connecting means (10).
A method of steering a trailer (1) around a turning point (O), said trailer being towed by a towing vehicle, wherein the trailer (1) comprises:
Dependencies are inferred from the claim text.