Electric winch crank
The invention relates to an electric winch crank ( 1 ) comprising a main body ( 3 ) which includes an electric motor ( 32 ); a gripping handle ( 2 ) arranged at one end of the main body ( 3 ) and able to pivot on same with respect to said main body ( 3 ); coupling means ( 4 ) to a winch ( 100 ), arranged at the opposite end of said main body ( 3 ); a transmission mechanism driven by the output shaft of the motor ( 32 ) and enabling rotation of the coupling means ( 4 ); a mechanical reducer ( 34 ) interposed between the output shaft of the motor ( 32 ) and the coupling means ( 4 ), said crank further comprising a braking system ( 35 ) mounted on the output shaft of the motor ( 32 ); a control member ( 23 ) located on said gripping handle ( 2 ) for actuating said braking system ( 35 ) via said electronic circuit ( 31 ) and a rotating collector ( 29 ) comprising a first portion ( 291 ) rigidly attached to the gripping handle, connected to said control member, and a second portion ( 292 ) rigidly attached to the main body electrically connected to an electronic circuit.
1. An electric winch crank comprising:
a main body having an electric motor controlled by an electronic circuit;
a gripping handle positioned at one end of the main body and pivotable at the one end relative to the main body;
a coupling means to a winch, positioned at an opposite end of the main body;
a transmission mechanism driven by an output shaft of the electric motor and allowing rotation of the coupling means; and
a mechanical reducer interposed between the output shaft of the electric motor and the coupling means, wherein
the transmission mechanism comprises a bevel gear mechanism and a hollow shaft mechanical reducer;
wherein the electric winch crank further comprises a mechanism for locking the electric winch crank within a capstan of the winch, the mechanism for locking the electric winch crank comprising:
a rotary shaft passing through the bevel gear mechanism, the hollow shaft mechanical reducer and the coupling means, the rotary shaft having a first portion formed by a toothed wheel disposed at an upper end of the rotary shaft and a second portion located at the opposite end of the rotary shaft, the second portion being moveable between two positions, wherein the two positions comprise:
an open position, wherein said second portion is aligned with a set of teeth of the coupling means; and
a closed position, wherein the second portion is angularly shifted with the set of teeth of the coupling means;
a rack coupled with the first portion of the rotary shaft in order to move the second portion in the open position when the rack is actioned; and
a restoring spring configured to move the second portion in the closed position.
2. The electric winch crank of claim 1 , wherein the displacements of the rotary shaft between the open and closed positions are made with an angle of 22.5°.
3. The electric winch crank of claim 1 , wherein the electric winch crank further comprises a push button to control a displacement of the rack to move the second portion in the open position.
4. The electric winch crank of claim 3 , wherein the electric winch crank further comprises a safety system preventing the push button from being actuated as soon as the electric motor is controlled.
5. The electric winch crank of claim 4 , wherein safety system is realized by an electromagnet.
6. The electric winch crank of claim 1 , wherein the electric winch crank further comprises an electric switch controlling an electromagnet, wherein the electromagnet controls a displacement of the rack to move the second portion in the open position.
7. The electric winch crank of claim 1 , wherein the electric winch crank further comprises a first self-lubricating ring mounted between the rotary shaft and thean upper part of the bevel gear mechanism.
8. The electric winch crank of claim 1 , wherein the mechanical reducer is comprised of a planetary gearset.
9. The electric winch crank of claim 8 , wherein the mechanical reducer includes at least one of a first, a second and a third reduction level.
10. The electric winch crank of claim 9 , wherein a self-lubricating ring is mounted in the third reduction level.