Mounting and fixing structure of test balancing weight of test breast board truck

The utility model belongs to the field of vehicle body tests, particularly relates to a mounting and fixing structure of a test counterweight block of a fence handcart for a test, and provides the following scheme aiming at the problems that a fixing bolt is usually required to be additionally mounted and the operation is relatively troublesome when the counterweight block is fixedly mounted at present: the mounting and fixing structure comprises a carriage in which the counterweight block is placed, the pressing plate comprises two pressing plates, a balancing weight is arranged on the two pressing plates, a moving groove is formed in the top of the balancing weight, a moving plate is connected to the inner wall of the moving groove in a sliding mode, a driving motor is fixedly installedon the inner wall of the bottom of the moving groove, and a screw rod is fixedly installed on an output shaft of the driving motor. The two U-shaped plates are arranged in the compartment, the two U-shaped plates can be clamp