Plunger body, plunger assembly and elevator buffer

The utility model belongs to the technical field of elevator accessories, and particularly relates to a plunger body, a plunger assembly and an elevator buffer. The plunger body is of a cylindrical structure formed by spinning a flat plate, one end of the plunger body is a closed end, and the other end of the plunger body is an open end; the plunger body comprises an equal-diameter section and a variable-diameter section which are distributed in the axial direction of the plunger body, the closed end is located on the equal-diameter section, the open end is located on the variable-diameter section, and the variable-diameter section is of a horn mouth structure. The end face of the closed end is provided with a groove formed through spinning. The horn mouth structure design of the reducing section of the plunger body is used as a spring cover, which is equivalent to the structure design of a spring cover of an existing plunger barrel, so that the difficulty of a spinning process is effectively reduced, and the