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AssigneeEtacarinae S.R.L.
InventorsPierangelo Vercellino, Valerio Raganelli
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Disclosed herein is a vehicle (1)—preferably a tractor—with a trailer (2) operatively connected thereto with a cardan (3), said cardan (3) comprising a power take-off, said power take-off being switched off when said cardan (3) builds with said vehicle (1) and/or with said trailer (2) an angle (ε) smaller than a first threshold value (a) and/or larger than a second threshold value (β) and being switched on when said angle (ε) exceeds again said first threshold value (β) thanks to suitable actuators, including detection means of the angle formed between the cardan (3) and said vehicle and/or trailer. According to the present invention, said angle (ε) is detected by a detector consisting of a magnetic device (4) placed on the trailer (2) or the vehicle (1) and an electronic compass (5) placed on the vehicle (1) or on the trailer (2). Preferably, the angle (ε) insisting on the cardan (3) is obtained according to the formula: ε=180−Y−arcsen (l/m sen y) (3) where y is the angle the compass (5) forms with respect to the straight travel with the magnet (4), I is the distance between the cardan (3) and the compass (5), m is the distance between the cardan (3) and the magnet (4).
A system for disconnecting a power take-off in a vehicle which is operatively connected to a trailer via a cardan, said system comprising a detection means for disconnecting said power take-off when said cardan forms with said vehicle and/or with said trailer an angle ε smaller than a first threshold value α and/or greater than a second threshold value β, and connects the power take-off when said angle ε exceeds said first threshold value again and/or goes below said second threshold value β via one or more actuators, said one or more actuators cooperating with said detection means for detecting the angle formed between the cardan and said vehicle and/or trailer, wherein said detection means includes a magnetic device placed on the trailer or vehicle and an electronic compass arranged on the vehicle or on the trailer such that the detection means detects measurements corresponding to said angle ε.
Dependencies are inferred from the claim text.