Sealing assembly and sealing structure

Abstract

The invention relates to a sealing assembly and a sealing structure. The sealing assembly comprises a supporting body, and the supporting body comprises a first end and a second end which are opposite in the radial direction; the sealing body is attached to the supporting body and comprises a main sealing lip, the first end of the supporting body is wrapped with the main sealing lip, and the main sealing lip is provided with an axially-through oil passing hole; the secondary sealing lip wraps the second end of the supporting body, and the wear-resistant sealing layer is attached to one side or two sides of the primary sealing lip. The oil passing hole and the wear-resistant sealing layer are arranged at the same end of the sealing body, and the wear-resistant sealing layer can reduce the friction force between the sealing body and the outer ring while allowing lubrication to pass through the oil passing hole, so that the sealing assembly can rotate relative to the outer ring more conveniently, and ring running of the sealing assembly is avoided.

Description

technical field [0001] The present disclosure relates to the technical field of sealing for electric vehicles, and in particular, to a sealing assembly and a sealing structure. Background technique [0002] In the related art, an inner wheel driver (IWD) for a vehicle generally includes a first member (eg, a shaft of an electric motor) and a second member (eg, a gear) that can rotate relative to each other box), in which the shaft of the electric motor can be rotated relative to the gearbox, and a contact sealing assembly is used between the shaft of the electric motor and the gearbox to form a sealed space between the gearbox and the sealing assembly, which can prevent the inside of the gearbox. The lubricating oil enters the electric motor and at the same time prevents impurities such as dust from the external environment from entering the gear box. [0003] However, the traditional sealing components of bearings or gearboxes used in the field of electric drives are easy ...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional sealing components of bearings or gearboxes used in the field of electric drives, when the bearings or gearboxes are in operation, are prone to accumulate a large amount of charge, because the lubricating oil inside the bearing is too thin, and the lubricating oil in the gearbox cannot enter the bearing Inside, the current formed by the accumulated charge cannot be released until the charge builds up so that the raceway of the bearing generates an excessive shaft voltage

Finally, due to the excessive shaft voltage, spark discharge is generated, and the spark discharge damages the bearing raceway, and oil stains and washboard-like ridge damage appear on the raceway, which will greatly affect the bearing and other transmission systems such as gears and gearboxes. quality and longevity

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