Vehicle waterproof vent valve

Abstract

The invention relates to the technical field of vehicle spare parts and discloses a vehicle waterproof vent valve. The vehicle waterproof vent valve comprises a valve body installed on a rear axle assembly, a valve hood and two or more floating bodies. An annular end cap is connected to the upper end of the valve body, the valve hood is connected to the exterior of the valve body, a gap is left between the valve hood and the valve body, and a plurality of strip-shaped holes distributed evenly are formed in the valve hood in the vertical direction; each floating body is provided with a sliding block which is matched in the corresponding strip-shaped hole, the floating bodies are of a hollow structure, the upper ends of all sliding blocks are connected with an annular fixing block in a bolt mode together, and the upper end of the fixing block is bonded with an annular sealing ring. According to the technical scheme, the exhausting requirements of the vehicle rear axle assembly in normal driving states can be met, when a vehicle wades into water, a air gap can be automatically closed, the water can be prevented from entering the vent valve, and the water wading requirement of the vehicle can be met; and the structure is simple, leakage of gear oil in the rear axle assembly can be reduced, and practicality is good.

Description

technical field [0001] The invention relates to the technical field of auto parts. Background technique [0002] On the automobile rear axle assembly, the breather valve assembly is used as a ventilation device to balance the internal and external pressure of the rear axle assembly and prevent external muddy water and dust from entering the interior of the rear axle assembly. The existing vent valve structure is mostly composed of vent valve body, vent valve cap, rubber gasket and spring. The vent valve cap is set on the vent valve body and connected with the vent valve body by riveting. The rubber gasket is compressed by the spring. On the breather valve body, when the operating temperature of the rear axle assembly reaches about 90°, the gear oil forms oil vapor and then generates air pressure. When the internal air pressure of the rear axle assembly is greater than the spring pressure, the rubber gasket is lifted up and opened upward, and the oil Steam leaks out from the...

AI Technical Summary

Problems solved by technology

Since automobiles generally have requirements for wading depth, and the deeper the wading depth, the better, and the structure of the existing vent valve adopts a spring force to control the opening pressure. When driving, the rear axle assembly often has water ingress, which will cause the cleanliness of the gear oil to be out of tolerance, resulting in oil leakage from the oil seal in the rear axle assembly, premature damage to bearings, oil seals, and gears, and abnormal noise from the rear axle. A series of problems; increasing the spring force and adjusting it to meet the wading depth requirements does not meet the opening pressure requirements, which will easily cause the internal air pressure of the rear axle assembly to be too large, and the lip of the oil seal will expand under the internal pressure, and then Oil leakage problem, so the existing vent valve structure restricts the wading performance of the car

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