Hub reduction gear combined sealing structure

Abstract

The invention relates to a hub reduction gear combined sealing structure, and belongs to the technical field of vehicle transmission. The sealing structure comprises a static ring and a movable ring,wherein the static ring is fixed to a frame; the movable ring is opposite to the static ring, and is fixedly connected to a torsion shaft; the end face of the static ring is provided with at least three rings from outside to inside along the radial direction; the outer circle of the ring on the innermost layer is provided with a clamping groove embedded with a packing; the inner circle of the ringon the innermost layer is in tight fit with a throttling ring and a framework oil seal; the throttling ring is provided with a group of radial extension combs which are arranged at intervals along the axial direction; the end face of the movable ring is provided with a circular lug and a lower edge inner ring which are embedded between adjacent rings to construct a radial labyrinth seal from outside to inside along the radial direction; the inner circumferential surface, opposite to the clamping groove, of the circular lug is in contact with the packing to construct a packing seal; the outercircle of the lower edge inner ring is in contact with the framework oil seal to seal the framework oil seal; and a throttling ring seal is formed at a position opposite to the throttling ring. The quadruple sealing structures perform own functions. Through organic combination, the lip edge of the framework oil seal is always in a stable and reliable sealing state, so that the fatigue failure is avoided effectively, and oil leakage after long-term use is avoided.

Description

technical field [0001] The invention relates to a combined sealing structure, in particular to a combined sealing structure of a wheel-side reducer, which belongs to the technical field of vehicle transmission. Background technique [0002] According to the applicant's knowledge, the drive tires of vehicles such as electric transmission mining dump trucks in mining and other industries are equipped with wheel-side reducers, which are used to bear the weight of the entire vehicle distributed on the rear axle and transmit torque to drive the mining dump truck. Since a certain amount of lubricating oil is injected inside the wheel reducer to lubricate internal gears and bearings and other components, it is necessary to use the static seal at the power input end and the dynamic seal device at the power output end to isolate from the outside world to achieve reliable sealing. [0003] However, the power output end is directly in contact with the atmosphere above the wheel surface...

AI Technical Summary

Problems solved by technology

However, practice has shown that oil leakage is prone to occur after the seal realized by this technical solution has been in operation for a long time

Images