Vehicle-mounted trolley lower longitudinal beam positioning device capable of quickly positioning

The utility model relates to a vehicle-mounted trolley lower longitudinal beam positioning device capable of quickly positioning, which comprises a front lower longitudinal beam and a rear lower longitudinal beam which are adjacent, a positioning mechanism and a locking mechanism, the positioning mechanism comprises a guide cylinder, a pull arm cylinder and a fixing plate, the guide cylinder and the pull arm cylinder extend outwards and are provided with through holes for mounting the locking mechanism, and the fixing plate is fixed on the guide cylinder and the pull arm cylinder. And after the guide cylinder is inserted into the hollow cavity of the pull arm cylinder, the two front and back adjacent lower longitudinal beams are fixedly connected by mounting a locking mechanism. The lining trolley is ingenious in design, simple in structure, easy to operate and capable of rapidly and accurately achieving mutual connection between the trolleys, reducing labor intensity of workers, achieving rapid transition in