商用车辆鼓式制动器应用中完整轮毂的尺寸兼容性 卡车和巴士

[中文适用范围]： 本SAE推荐实践定义了一个间隙线，用于确定鼓式制动器与19.5英寸、22.5英寸和24.5英寸直径轮毂之间尺寸的兼容性。专为鼓式制动器设计的轮毂可能不适用于盘式制动器。提供的这些线界定了制动器的最大轮廓（包括所有间隙）和完整轮毂的最小轮廓，以实现互换性。本文档仅涉及尺寸特性，未提及系统的性能、操作动态偏转或散热。阀杆间隙未包含在适配线中。为避开制动鼓，可能需要使用弯曲的阀杆。盘式制动器应用可能需要在最小轮廓线提供的间隙之外，增加额外的运行间隙。所提及的安装系统在SAE J694中有详细说明。 [外文原描述]： This SAE Recommended Practice defines a clearance line for establishing dimensional compatibility between drum brakes and wheels with 19.5-inch, 22.5-inch, and 24.5-inch diameter rims. Wheels designed for use with drum brakes may not be suitable for disc brake applications. The lines provided establish the maximum envelope for brakes, including all clearances, and minimum envelope for complete wheels to allow for interchangeability. This document addresses the dimensional characteristics only and makes no reference to the performance, operational dynamic deflections, or heat dissipation of the system. Valve clearances have not been included in the fitment lines. Bent valves may be required to clear brake drums. Disc brake applications may require additional running clearances beyond those provided by the minimum contour lines. Mounting systems as noted are referenced in SAE J694.