上车钩主销 商用拖车和半挂车

[中文适用范围]： 本SAE标准适用于商用拖车和半挂车在空载状态下的上耦合器主销。参见图1。一个90度±1度的角度从主销的中心线延伸到上耦合器板表面，在48.26厘米（19英寸）半径范围内。上耦合器板表面在48.26厘米（19英寸）半径范围内不应向下凸起超过0.635厘米（1/4英寸），或在25.4厘米（10英寸）半径范围内超过0.3175厘米（1/8英寸）。上耦合器板表面在48.26厘米（19英寸）半径范围内不应向上凹起超过0.15875厘米（1/16英寸）。参见图2。 注：关于推荐性能，请参考SAE J133。 [外文原描述]： This SAE Standard applies to upper coupler kingpins for commercial trailers and semitrailers in the unladen condition. See Figure 1 . A 90 degree ± 1 degree angle extends (in all directions) from the centerline of the kingpin to the upper coupler plate surface within a 48.26 cm (19 inch) radius. The upper coupler plate surface should not bow downward (convex) more than 0.635 cm (1/4 inch) within a 48.26 cm (19 inch) radius or more than 0.3175 cm (1/8 inch) at a radius of 25.4 cm (10 inches) from the kingpin. The upper coupler plate surface should not bow upward (concave) more than 0.15875 cm (1/16 inch) within a 48.26 cm (19 inch) radius. (See Figure 2 .)Cross Reference: J133