Six-dimensional force-torque sensor for realizing extension of measuring range

The invention discloses a six-dimensional force-torque sensor for realizing the extension of a measuring range. The six-dimensional force-torque sensor comprises a resilient body and straining plates which are arranged on the resilient body; the resilient body comprises four fixed platform, a central loading platform and four beam units, and each beam unit is arranged between two adjacent fixed platforms; each beam unit comprises an outer floating beam, an inner floating beam and a resilient beam, the outer floating beam is parallel to the inner floating beam, the outer floating beam and the inner floating beam form a pair of double-beam, two ends of the double-beam are respectively fixedly connected onto the side walls of the two fixed platforms, the resilient beam is vertical to the double-beam, one end of the resilient beam is fixedly connected onto the inner wall of the outer floating beam, and the other end of the resilient beam is fixedly connected onto one side wall of the central loading platform; the straining plates are divided into six groups and adhered onto the resilient beam; each group of straining plates form a Wheatstone bridge. By adopting the six-dimensional force-torque sensor, under the condition that the peripheral size of the sensor is not changed, the measuring range is effectively increased, and the rigidness of the sensor is improved.