| 摘要 |
<p>A gear case comprises three parts: upper and lower sections of heavy duty castings or fabricated steel, the lower section having an open bottom, and a light gauge sheet metal pan enclosing the bottom of the lower section. Alternatively, the upper and lower sections comprise a one piece rigid housing open at the bottom. The pan is wider than the upper and lower sections to afford extra lubricant capacity. A molded baffle resides in the pan to separate active from reserve volumes of lubricant. The heavy duty sections have machined openings to receive seals and afford dimensional stability. The sheet metal pan is collapsible to take the consequences of impact in case of minor derailment and is easily repaired or replaced.</p> |
