Automobile scale top plate fixing and limiting device

The utility model discloses a motor truck scale top plate fixing and limiting device in the technical field of motor truck scales, which comprises a lower plate, a pressure sensor is fixedly mounted at the top of the lower plate, and an upper plate is fixedly mounted at the top of the pressure sensor. The upper plate does not displace on the surface of the lower plate, the purpose of protecting the pressure sensor is achieved, the limiting assembly does not limit the longitudinal moving position of the upper plate so as to ensure that the pressure sensor can conduct normal weighing, the supporting mechanism is further arranged in the device, a lot of acting force can be generated when a truck walks on the upper plate, and the pressure sensor can be protected. And the upper plate is completely supported through the supporting mechanism, so that the vibration acting force is completely conducted to the supporting mechanism, the acting force is prevented from directly acting on the pressure sensor, the purpose o