Cooling fan and electronic device with the cooling fan

Abstract

A cooling fan, comprising a stator, a rotor rotatable relative to the stator, and a base supporting the stator, the base is provided with a center column, and a bottom end closure is formed in the center column The receiving hole is used to accommodate a bearing structure in it, the stator is fixed on the periphery of the central column, the rotor includes a hub, and a shaft seat is formed on the hub, and the top end of the central column is radially The ground protrudes to form an annular baffle, the bearing structure includes a bearing and an oil seal formed on the top end of the bearing, the bearing and the oil seal are integrally formed through a molding process, and the top of the oil seal is connected to the ring The baffle is fixed by hot melting, the central area of ​​the oil seal is depressed to form an inner recess, and the shaft seat extends into the inner recess to prevent lubricating oil from leaking.

Description

technical field [0001] The invention relates to a cooling fan and an electronic device with the cooling fan. Background technique [0002] With the rapid development of the computer industry, the central processing unit (CPU) pursues high-speed, multi-functional and miniaturized heat dissipation problems are becoming more and more serious. If the heat is not dissipated in a timely and effective manner, it will greatly affect The working performance of electronic components will also reduce the service life of electronic components. Therefore, the industry usually attaches a heat sink to the heat-generating electronic components and uses a heat-dissipating fan to generate forced airflow to the heat-sink to accelerate heat dissipation, or directly uses a heat-dissipating fan to air-cool the heat-generating electronic components. [0003] A traditional cooling fan includes a stator, a rotor rotatable relative to the stator, and a base plate carrying the stator and the rotor. ...

AI Technical Summary

Problems solved by technology

The metal oil seal usually needs to be riveted with the top of the center column to fix the bearing in the receiving hole. However, the riveting of the metal oil seal with the center column is difficult, resulting in a high defect rate of the cooling fan; the plastic oil seal is generally hot-melted with the The top of the center column is fixed to fix the bearing in the receiving hole. However, the characteristics of the plastic material make the gap between the shaft core and the bearing relatively large, resulting in easy leakage of lubricating oil, which affects the reliability and life of the cooling fan.

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