Patent ID: 8322691
Filing Date: 2012-12-04
Classification: B66D

Abstract:
1. A winch for pulling a cable (C), said winch ( 1 ) being intended to be associated with a reel for storing said cable, wherein said pulling winch ( 1 ) is composed of two motorized drums ( 3 ), placed opposite to each other, each comprising an active cylindrical peripheral drum surface ( 5 ) provided with several annular grooves ( 6 ), juxtaposed and coaxial to each other, said cable (C) being intended to be wound around said two drums ( 3 ) according to an arrangement of the helical type, strands of said cable passing successively from one of the annular grooves ( 6 ) of a drum ( 3 ) to one of the annular grooves ( 6 ) of the other drum ( 3 ), wherein said motorized drums ( 3 ) are each formed of at least three pulleys ( 11 ), which each comprise a cylindrical peripheral pulley surface ( 12 ) provided with at least one of said grooves ( 6 ) so as to each form a portion of said active cylindrical peripheral drum surface ( 5 ) of drum, i.e. two outer pulleys ( 11 a , 11 d ), between which is arranged at least one central pulley ( 11 b , 11 c ), wherein the pulleys ( 11 ) are each rotationally mounted on a fixed axial bearing shaft ( 9 ), around a common central axis ( 10 ), and each cooperate with their own dedicated motor means ( 4 ), wherein said at least one central pulley ( 11 b , 11 c ) comprises at least one axial extension ( 15 ), generally tubular in shape, so that said at least one central pulley ( 11 b , 11 c ) has a rotational central cylindrical surface ( 13 b , 13 c ) adapted to cooperate with a complementary cylindrical surface ( 17 ) forming a bearing, and so that a cylindrical peripheral extension surface ( 17 ) of said at least one axial extension ( 15 ) forms a rotation bearing for the rotational central cylindrical surface ( 13 ) of at least one of said other pulleys ( 11 ), characterized in that a first central pulley ( 11 b ) comprises two axial tubular extensions ( 15 b 1 , 15 b 2 ) arranged on either side of its cylindrical peripheral pulley surface ( 12 b ) that is provided with a single groove ( 6 b ), and each forming a rotation bearing for the rotational central cylindrical surface ( 13 ) of at least one of said other pulleys ( 11 ).