Safety device for agricultural machines

A safety device for an agricultural machine provided with at least one rotating working shaft, the safety device comprising:

• a stop element and a complementary stop element both associated functionally with a kinematic transmission chain connected to control the working shaft, wherein the stop element is movable on command from a passive configuration, in which the stop element is spaced from the complementary stop element to allow free rotation of the working shaft, to an active configuration, in which the stop element is arranged so as to interfere with the trajectory of the complementary stop element thereby locking of the complementary stop element and of the working shaft;
• a damping unit associated with at least one of the stop element and the complementary stop element, wherein the damping unit is actuated automatically upon impact of the stop element against the complementary stop element;
• and
• an actuation element activated by an operator for the controlled transition of the stop element from the passive configuration to the active configuration,
• wherein the actuation element comprises a bar which oscillates between a first limit position and a second limit position and is arranged in front of the working shaft and parallel thereto, the bar being functionally associated, by way of respective transmission means, with the arm, wherein pressing of the bar oscillates the bar from the first limit position to the second position, causing the arm to transition from the passive configuration to the active configuration, and
• wherein the transmission means comprise a cable associated with the bar and inserted in a containment sheath, the cable being inserted in a slot which is provided in a protrusion that protrudes at right angles from the supporting plate, the sheath being fixed, at the opposite end, to a second end portion of the arm, which is opposite to the first end.

A safety device for an agricultural machine provided with at least one rotating working shaft, the safety device comprising:

• a stop element and a complementary stop element both associated functionally with a kinematic transmission chain connected to control the working shaft, wherein the stop element is movable on command from a passive configuration, in which the stop element is spaced from the complementary stop element to allow free rotation of the working shaft, to an active configuration, in which the stop element is arranged so as to interfere with the trajectory of the complementary stop element thereby locking of the complementary stop element and of the working shaft;
• a damping unit associated with at least one of the stop element and the complementary stop element, wherein the damping unit is actuated automatically upon impact of the stop element against the complementary stop element,
• wherein the stop element comprises an arm which is articulated to a supporting late about a first pivot for oscillation from the passive configuration in which the arm is spaced from the complementary stop element, to the active configuration, and vice versa, wherein in the active configuration, a first end portion of the arm, which is substantially opposite to the first pivot, is arranged along the stroke of at least one shoulder, which protrudes externally from a rotating disk, which substantially constitutes the complementary stop element and is keyed on the output shaft of the power take-off of the agricultural machine, the output shaft being designed to transmit motion to the working shaft;
• and
• a lever, which protrudes transversely from the arm through a contoured guiding slot for the arm, which is provided along the supporting plate, the lever being able to be gripped manually by an operator for the transition of the arm, when the motor assembly of the agricultural machine is deactivated, from the active configuration to the passive configuration.