Locking device for clamp of motor vehicle steering wheel tester

The utility model discloses a locking device for a clamp of a motor vehicle steering wheel tester. The locking device for the clamp of the motor vehicle steering wheel tester is formed by combining a shell (2), a side panel (1), a clamp loosening trigger (3), an ejector rod (4) and a clamping set arranged inside, the locking device is arranged in one end of an inner hole of a main rod (G) in a sleeved mode, a rectangular inner hole (D) of the shell (2) and a push-and-pull rod (L) are arranged in a matched and sleeved mode, the push-and-pull rod (L) is clamped and locked by the clamping set when the push-and-pull rod (L) is pulled out backwards, the clamp loosening trigger (3) is pulled inwards, and then the push-and-pull rod (L) can be pushed rightwards. An oblique groove (X) is formed in the inner side of the side panel (1), the front end of the oblique groove (X) is connected with an ejector rod hole (K), the rear end of the oblique groove (X) is connected with a pin spring hole (F), a pin roller (6) of the clamping set is arranged in the oblique groove (X) in the transverse direction, the front side of the pin roller (6) abuts against the ejector rod (4), the rear side of the pin roller (6) abuts against a movable pin (7), and the rear end of the movable pin (7) abuts against a reset spring (8) at the inner end of the pin spring hole (F). The locking device for the clamp of the motor vehicle steering wheel tester is compact in structure, convenient to use, flexible in motion, reliable in locking and high in matching performance, the clamp can be fixed firmly, the service life is long, cost is low, and efficiency is high.