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US 2025/0033941 A1Published application
Handling machine comprising a hydraulic steering system
AssigneeManitou Bf
InventorsHervé MERTEN, Grégory BIDET
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AssigneeManitou Bf
InventorsHervé MERTEN, Grégory BIDET
Estimating the term…
The invention relates to a handling machine comprising a hydraulic steering circuit (3), a first hydraulic control circuit (100), provided with a manual steering device (4), which allows steering cylinders (31-34) of the hydraulic steering circuit (3) to be supplied with power, and a second hydraulic control circuit (200) which is used to control at least one hydraulic actuation cylinder (5) for actuating a handling member of the machine. The second circuit (200) comprises a hydraulic directional control valve (210), a hydraulic connection circuit (600) which is connected to the steering circuit, and a diverter valve (220) to which the connection circuit (600), the hydraulic actuation cylinder (5) and the hydraulic directional control valve (210) are connected. The diverter valve (220) is electrically controllable by a control unit (10) to selectively control the hydraulic actuation cylinder (5) and the same steering cylinders as those which are controllable by the first control circuit (100).
A handling machine including:
The handling machine as claimed in either one of the preceding claims in which the first control circuit (100), the second control circuit (200) and the steering circuit (3) act on the same lines (L32, L300) of the steering circuit (3) so that the second control circuit (200) is adapted to act on the steering of the same wheels as those on which the first control circuit (100) is adapted to act, and vice versa.
The handling machine as claimed in any one of the preceding claims including front wheels and rear wheels, the steering circuit (3) being configured to enable steering of at least the front wheels.
The handling machine as claimed in any one of the preceding claims in which the second hydraulic control circuit (200) is connected to lines (L32, L300) of the steering circuit (3) that are connected to the first hydraulic control circuit (100).
The handling machine as claimed in any one of the preceding claims in which the steering circuit (3) includes a selector (300) for selecting the wheels to be steered.
The handling machine as claimed in any one of the preceding claims in which, the steering circuit (3) including a selector (300) for selecting the wheels to be steered, the second hydraulic control circuit (200) is connected to the steering circuit (3) between the first control circuit (100) and the selector (300).
The handling machine as claimed in any one of the preceding claims in which the steering circuit (3) includes a selector (300) configured to be able to adopt a plurality of states selectively, said states including:
The handling machine as claimed in the preceding claim in which another line (L61) of the second hydraulic control circuit (200) is connected to a line (L32) of the steering circuit (3) that extends between a steering cylinder (300), preferably a front wheel steering cylinder, and the first hydraulic control circuit (100).
The handling machine as claimed in any one of the preceding claims in which the hydraulic cylinder (5) for actuating a handling member is a cylinder for inclining a tool-holder of the handling machine.
The handling machine as claimed in any one of the preceding claims in which at least one of the first and second control circuits (100, 200) and preferably each of them includes a pressure limiter device (180, 680).
Dependencies are inferred from the claim text.