Combined balance beam mechanism of crane

The invention belongs to the technical field of hoisting machinery and in particular relates to a combined balance beam mechanism of a crane. The combined balance beam mechanism of the crane comprises a balance beam, limit switches, a support, a hinge pin I, a pressure type load sensor, a lever, a hinge pin II, a connector, a hinge pin III, a mounting platform and steel wire rope fixing joints, wherein the balance beam is connected with the connector by the hinge pin III and can rotate around the hinge pin III; the two steel wire rope fixing joints are symmetrically connected at the lower end of the balance beam, and steel wire ropes are respectively fixed on the steel wire rope fixing joints; the limit switches are arranged at two sides of the balance beam, the connector is connected with one end of the lever by the hinge pin II, the other end of the lever is connected with the support by the hinge pin I, and the middle point of the lever is pressed on a sensing point of the pressure type load sensor, and the pressure type load sensor and the support are fixed on the mounting platform. According to the combined balance beam mechanism of the crane, the load sensor and the balance beam mechanism are combined by the lever principle, and the safety reliability of the load detection mechanism can be improved.