Vehicle-mounted overload detection networking alarm device

The utility model discloses a vehicle-mounted overload detection networking alarm device, relates to the technical field of vehicle overload detection, and solves the technical problems that more dust and impurities are attached to a sliding cylinder in the prior art, the abrasion between the sliding cylinder and a cylinder sleeve is large, and the service life of the alarm device is shortened. Comprising a cylinder sleeve, a distance measuring cabin arranged on the cylinder sleeve, a sliding cylinder arranged in the cylinder sleeve, a ball sheath arranged at the end of the sliding cylinder and located in the cylinder sleeve, an alarm terminal arranged on the sliding cylinder and a laser distance measuring instrument arranged at the end of the alarm terminal and located in the distance measuring cabin. The dustproof structure comprises a dust removal ring arranged on the cylinder sleeve, a vent groove formed in the dust removal ring and a rubber sealing ring arranged on the side face of the ball sheath; due t