Electromechanical type force source device allowing bi-directional loading

The invention discloses an electromechanical type force source device allowing bi-directional loading. The electromechanical type force source device is a loading device which exerts force on a loaded object by the utilization of displacement changes. The electromechanical type force source device comprises a drive component, a guide component, a monitoring element and a precise force transmission component. The drive component is composed of a servo motor and a spiral lifting machine and is in charge of driving the force transmission component to move in an orientation mode. The guide component is used for guaranteeing that the direction of loading force is in the direction needing loading. The monitoring element can monitor an output force value in real time. The precise force transmission component is composed of a force transmission rod, a connecting flange and flexible beams which are symmetrically arranged at the two ends of the flange. The precise force transmission component can eliminate force interference in other directions and achieve loading of pull force and pressure in the two directions. The electromechanical type force source device is compact in structure and high in response speed, the defects that a traditional force source device is huge in mechanism, low in loading efficiency and troublesome in later-period maintaining are overcome, and the electromechanical type force source device can be widely applied to in-situ calibration of a large-size and six-component balance and automatic loading systems of other balances.