Bearing sealing structure and electric spindle with same

Abstract

The invention discloses a bearing sealing structure and an electric spindle with the same, and belongs to the field of machining tool equipment. The bearing sealing structure comprises a lower cover,a locking member and a protective cover, wherein the locking member is connected with the protective cover to form a rotating component; a clearance passage is formed between the lower cover and the rotating component; the lower cover is provided with a plurality of inclined passages; the inclined passages extend toward a second side face; the side, near to the second side face, of each inclined passage is provided with a first air outlet; each first air outlet communicates to the clearance passage; the rotating component is provided with a chute; the chute is provided with a notch and a sidegroove surface; the side groove surface obliquely extends toward the protective cover; the notch communicates with the clearance passage; and the electric spindle comprises the bearing sealing structure, and further comprises a shaft core, a bearing and a spindle body. By the cooperation of the inclined passages and the chute of the bearing sealing structure, the sealing effect is ensured while alubricating medium in the bearing is prevented from being dried up; and the electric spindle with the sealing structure has the advantages of stable performance and long service life.

Description

technical field [0001] The invention relates to processing machine tool equipment, in particular to a bearing sealing structure and an electric spindle including the bearing sealing structure. Background technique [0002] At present, with the development of modern machinery, the concept of Industry 4.0 has been proposed in the industrial field, and the application range of electric spindles has become wider and wider. The electric spindle is a precision component, which is widely used in high-speed, high-precision machining centers. The core component is the high-speed and precise spindle bearing. Under high-speed operation, any tiny impurities entering the spindle bearing may cause the spindle to vibrate. Even damage to the bearing will affect the working accuracy and life of the spindle. The bearing sealing structure of the electric spindle plays a vital role in the accuracy, reliability and working life of the electric spindle. [0003] However, the existing bearing sea...

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Problems solved by technology

[0004] (1) The labyrinth seal structure is adopted, and the staggered seals are used to form a zigzag or ladder-shaped sealing channel, which forms a multi-layer barrier for impurities to achieve the effect of dustproof and waterproof, but there is still a certain risk of leakage in this sealing structure , some tiny light impurities or moisture can still enter the bearing through the labyrinth sealing channel;

[0005] (2) The air curtain sealing structure is adopted, and the air sealing ring is set on the main shaft. The air sealing ring is connected to the external high-pressure gas. The air holes are evenly distributed on the air sealing ring, and the air outlet holes blow out impurities to achieve dustproof and waterproof. However, with the air curtain sealing structure, when blowing air, part of the gas will blow towards the bearing, which will not only bring impurities to the bearing; when the bearing is a grease-lubricated bearing, it will also dry the grease on the bearing; Thereby reducing the bearing performance and affecting the service life of the electric spindle

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