| 摘要 |
The invention relates to a loading-monitor and safety device for a hydraulic circuit for controlling, for example, the movements of a crane (7) on the loading surface (1) of a motor vehicle.
<??>Pressure switches (23, 24) are set to different response pressures but both are connected in parallel to the working chamber (20) of large cross-section of the power cylinder (18) of the jib (12). A programmed, electronic arithmetic unit (26) receives the signals from the pressure switches (23, 24) to permit or block the movements selected by the operator when the operator actuates the hydraulic control levers (32). The arithmetic unit (26) can block a movement by actuating a hydraulic solenoid valve (29).
<??>Use: blocking the dangerous movements of the crane (7), which could, for example, otherwise cause the lorry to overturn.
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