Simple double-torsional spring tension strength testing device

The utility model discloses a simple double-torsional spring tension strength testing device which is characterized by comprising a first guide rod, a first moving block, a fixed block, a locking screw, a second moving block, a pressing plate, a screw rod and a limiting screw, wherein the first moving block and the second moving block are respectively positioned on two sides of the fixed block; the first moving block and the second moving block are connected with the fixed block through the screw rod and the first guide rod; the first guide rod and the fixed block are matched and in transitional connection for limiting axial displacement; the first guide rod, the first moving block and the second moving block are connected and in clearance fit; the screw rod and the fixed block are in clearance fit and rotational connection for limiting axial displacement; left-hand threads are formed in one end of the screw; right-hand threads are formed in the other end of the screw rod; the screw rod are matched and in left-hand thread and right-hand thread fixed connection with the first moving block and the second moving block respectively; clamping holes which are matched with a pressing plate and used for clamping a torsion arm are respectively formed above the first moving block, the second moving block and the fixed block. The simple double-torsional spring tension strength testing device is used for converting tension strength testing into tensile elongation testing and is simple to operate.