| 摘要 |
PURPOSE:To improve the starting performance of motor by inclining at least one of crank shaft of enclosed compressor or thrust face of bearing section where the crank shaft 1 is supported in cantilever by the bearing upwardly toward the center of axis thereby widening the contacting face of thrust face under compression stroke and reducing the frictional resistance. CONSTITUTION:Under compression stroke, the crank shaft 5 is inclined by reaction so a thrust face 5a having upward inclination of corresponding angle toward the axis is formed on the thrust face of crank shaft 5 to contact the thrust face at the opposite side of load uniformly under compression stroke. Said thrust face 5a has same angle over the entire circumference and never separate even under suction and transfer strokes but slide smoothly to cause no hitting noise. The upward inclination can be provided at the bearing 7 side or both of the crank shaft 5 and bearing 7. |
