Wind power blade lifting mechanism

The invention relates to a wind power blade lifting mechanism, which comprises a four-bar mechanism, wherein the four-bar mechanism comprises a rotary platform, a front side link, a rear side link and a connecting rod assembly; by setting the initial position of the four-bar mechanism and the length of each bar, when the connecting rod assembly is driven by the driving element to move, the point A on the extension line of the connecting rod assembly can move along the track B approximate to the plumb line; when transporting the blade, the blade is installed on the transition disc at the rear end of the connecting rod assembly, and the blade counterweight is arranged on the swinging frame at the front end of the connecting rod assembly to form a pitching assembly, so that the gravity center of the pitching assembly coincides with a point A on the extension line of the connecting rod assembly. Because the blade lifting mechanism is a four-bar mechanism, only one set of driving element is needed, and the problem of matching of two sets of executing mechanisms does not exist; because the slewing bearing is arranged under the gravity centers of the pitching assembly and the slewing platform, the gravity center of the upper mounting part is positioned on the axis of the slewing bearing at any lifting and slewing position, and the slewing platform can perform 360-degree slewing at any lifting angle of the blade.