Hydraulic clamping and releasing device for Hopkinson torsion bar

The invention discloses a hydraulic clamping and releasing device for a Hopkinson torsion bar, belongs to the field of material dynamic mechanical property experiment equipment, and aims to solve the problems that the clamping force of the conventional Hopkinson torsion bar clamping and releasing mechanism cannot be accurately controlled, the releasing process is slow and the repeatability is poor. The device comprises a cylinder body, a piston, a guide bolt, a pushing sleeve, an elastic chuck, a cylinder body gland, a belleville spring, a hydraulic oil pump and an electromagnetic quick pressure release valve, during clamping operation, oil is rapidly injected into the oil injection hole through the hydraulic oil pump, the piston is pushed to move rightwards in the axial direction, the pushing and pressing sleeve is pushed to move rightwards to apply pressure, the belleville spring and the elastic chuck are pressed and deformed at the same time, and the elastic chuck clamps an input rod of the Hopkinson torsi