A height-adjusting road height-limiting gantry and its adjustment method

Abstract

The invention discloses a height-adjusting road height-limiting gantry and an adjustment method, which belong to the field of urban road and road safety protection, and in particular relate to a height-limiting device capable of changing the height to limit the passage of super-high vehicles. The gantry consists of a fixed lower structure and a foldable height-adjustable upper structure. The columns and beams of the upper structure are fixed on the lower structure through the rotating shaft. The rotating upper structure is equipped with a balance device, which can be rotated manually without power. Rotate the upper structure to change the position of the beam to realize the height change of the height-limited gantry. The set self-locking mechanism can automatically lock when the mast is adjusted in place. Compared with the lift-type height-limiting gantry in the prior art, the complex driving mechanism is omitted, the beam and the counterweight are balanced, the conversion structure is simple, the manufacturing cost is low, no electricity is required, and the adaptability is good.

Description

Technical field [0001] The present invention relates to an adjustment method for adjusting a high-level high gantry and adjustment method. Background technique [0002] The bridges and tunnels of urban roads and roads have certain speeds to ensure the safety of vehicles. Regulations on the Implementation of the Road Traffic Safety Law of the People's Republic of China stipulate that "motor vehicles must not exceed the quality of the carrier, load length, and the width should not exceed the carriage, and should abide by the following provisions: heavy, medium-sized trucks Half-hanging car, the height does not exceed 4M from the ground, the vehicle carries the container must not exceed 4.2m; other cargo motor vehicles must not exceed 2.5m from the ground. "Urban Road Engineering Design Specification" CJJ37- 2012, the smallest net highway is high, the motor vehicle limit is 4.5m, the passenger car 3.5m. "Highway Engineering Technical Standard" JTG B01-2014 stipulates that the highwa...

AI Technical Summary

Problems solved by technology

Lifting height limit mast, if it is adjusted from a small car with a height limit of 3.0m to a large vehicle with a height limit of 4.5m, the beam of the mast needs to be lifted by 1.5m, and the hydraulic lift requires a hydraulic cylinder with a stroke of 1.5m, and a screw screw to lift up to 1.5m , the lifting mechanism requires a larger size, and the lifting-type height-limiting mast is compared with the ordinary fixed mast, which adds a complex mechanical transmission mechanism and high manufacturing cost

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