| 摘要 |
A sealed compressor is provided to improve the long-term reliability by reducing the abrasion generated on the inner spherical surface and the outer spherical surface of a ball joint structure. A sealed compressor includes a compressing device, a motor, a crank shaft, a piston(4), and a connecting bar(2). The compressing device and the motor are received in a sealed vessel. The crank shaft and the piston are driving by the motor, and are connected in a ball joint structure by the connecting bar. The ball joint structure comprises an inner spherical surface placed at the piston, and a spherical unit placed at the connecting bar. The inner spherical surface and the spherical unit are ferrous sintered materials sealed by an oxide film.
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