Anti-stripping crank pin assembly for beam-pumping unit

A pumping unit run resistance crank pin assembly comprises an observation bolt, a cotter pin, a cap, a crown nut, a cover board, an asbestos gasket, a gasket, a fixed bolt, a double row spherical roller bearing, a bearing seat, a large taper sleeve, a small taper sleeve and a crank pin, in which the middle is a cube in which four corners are arc-shaped. An inner thread mounting hole is respectively arranged inside four corners. The left end is a convex conical platform, and the right end is a T-shaped cylinder. The left tip is provided with a fixed through-hole. A rectangular opening arranged on the axial direction of the large taper sleeve is installed inside the left tip. The small taper sleeve is inside the large taper sleeve. The double row spherical roller bearing is installed inside the bearing seat. The crank pin passes through the bearing seat and the double row spherical roller bearing. The left end of the crank pin is provided in sequence with the gasket, the crown nut with reversed thread, the cap and the cotter pin. The bearing seat left is the asbestos gasket and the cover board. The bearing seat, the asbestos gasket and the cover board are linked through the fixed bolt. The observation bolt is disposed on the edge of the cover board head face, in which the inside is provided with a 270 degree rotated L-shaped through-hole.