Torque limiter

A torque limiter, comprising:

• a mounting seat;
• an input shaft rotatably mounted on the mounting seat and configured for connecting to a driving source, and the input shaft comprising a positioning post;
• an output shaft rotatably mounted on the mounting seat, spaced from the input shaft and configured for connecting to a driven load, the output shaft comprising a resisting post;
• a shaft sleeve comprising a cam end and a resisting end opposite to the cam end, an end surface of the cam end defining a cam surface, an end surface of the resisting end defining a resisting surface, a cam groove being defined in a periphery of the shaft sleeve adjacent to the resisting end;
• and
• an adjustment mechanism placed on the input shaft and resisting against the resisting surface;
• wherein the cam surface comprises a concave portion and a top portion connected to the concave portion;
• the cam groove comprises a sliding groove and a positioning slot communicating with the sliding groove, the positioning slot is defined in a side of the sliding groove adjacent to the resisting end;
• the output shaft is inserted into the cam end, the resisting post resists against the concave portion;
• the input shaft is inserted into the resisting end, and the positioning post is engaged in the positioning slot;
• a distance from a bottom of the positioning slot to a side surface of the sliding groove adjacent to the positioning slot is greater than a distance from the concave portion to one top portion along an axial direction of the shaft sleeve;
• when the driven load is reached a predetermined torque range, the output shaft is rotated by the input shaft and drives the driven load;
• when the driven load is reached an overload torque amount, the cam surface moves relative to the resisting post to the top portion of the cam surface, the cam surface is separated from the resisting post, such that the input shaft is uncoupled with the output shaft.