Alternating stress fatigue testing equipment

An alternating stress fatigue test equipment, comprising:

• a base (200) on which linear guide rails are provided;
• a deflection loading device (100) being arranged on the base and used to drive a clamped object to be measured to slide to a first position, so that the to-be-measured object is bent to a target degree and maintained, and the deflection loading device (100) is rotationally connected with the to-be-measured object;
• two hinge shaft supports (300) being arranged on the linear guide rails, wherein the hinge shaft supports (300) are symmetrically arranged along the longitudinal central line of the deflection loading device (100), the hinge shaft supports (300) are used to being connected with two ends of the to-be-measured object, respectively, and the hinge shaft supports (300) are configured to be capable of being obliquely adjusted, so as to adapt to the bending of the to-be-measured object to the target degree;
• a power device (400) being arranged on the linear guide rail, and the power device (400) is in transmission connection with one of the hinge shaft support (300), so that the power device (400) can drive the to-be-measured object to rotate, wherein:
• the deflection loading device (100) comprises:
• a supporting mechanism (11), wherein the supporting mechanism (11) is provided with a slideway (19), and the slideway (19) is arranged in a height direction of the supporting mechanism (11);
• a loading connection mechanism being connected with the supporting mechanism (11) and used to rotationally clamp the to-be-measured object, wherein the loading connection mechanism comprises a first sliding block (104), the first sliding block (104) is connected with the sliding way (19) in a sliding fit manner, and when the loading connection mechanism slides to a first position relative to the supporting mechanism, so that the to-be-measured object is bent to the target degree;
• a first driving mechanism being connected with the loading connection mechanism and used to drive the loading connection mechanism to slide relative to the supporting mechanism;
• a locking mechanism being arranged on the supporting mechanism (11), and the locking mechanism is used to limit the loading connection mechanism, so that the loading connection mechanism is kept at the first position relative to the supporting mechanism;
• wherein:
• the locking mechanism comprises a leading screw locking assembly, wherein the leading screw locking assembly comprises a screw rod (12) and a screw nut (17), the screw rod (12) is arranged in the slideway, two ends of the screw rod (12) are rotationally connected with the supporting mechanism (11), the screw nut (17) is connected with the screw rod (12) in a fit manner, and the screw nut (17) moves in the slideway;
• and
• the first sliding block has a first hole for enabling the screw rod (12) to pass through, when the first driving mechanism drives the loading connection mechanism to move to the first position, the screw rod drives the screw nut (17) to tightly abut against the first sliding block to overcome elastic force generated by the bending of the to-be-measured object, so that the loading connection mechanism is kept at the first position relative to the supporting mechanism (11).