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1.发明申请公开(公告)号：US20170016496A1
公开(公告)日：2017-01-19
申请号：US14802669
申请日：2015-07-17
CPC分类号： F16D65/0006 , F16D51/22 , F16D65/0018 , F16D65/22 , F16D2125/30 , G06F17/5095
摘要： A drum brake assembly and method for designing the assembly are provided. The assembly includes a brake spider, a pair of brake shoes pivotally coupled to the brake spider at one end, and a pair of cam followers disposed at opposite ends of the brake shoes. The assembly further includes a camshaft having a shaft disposed along a rotational axis and a cam disposed at one end of the shaft. The cam has an inboard side proximate the shaft, an outboard side distant from the shaft and a cam surface extending between the inboard and outboard sides in engagement with the cam followers. The camshaft further includes a noise reducing mass disposed on the outboard side of the cam. The mass is configured to establish a natural frequency in the cam that differs from a natural frequency of the first and second brake shoes to reduce audible noise.
摘要翻译： 提供了一种用于设计组件的鼓式制动组件和方法。 该组件包括制动器蜘蛛，在一端枢转地联接到制动器蜘蛛的一对制动蹄以及设置在制动蹄的相对端的一对凸轮从动件。 组件还包括凸轮轴，其具有沿旋转轴线设置的轴和设置在轴的一端的凸轮。 凸轮具有靠近轴的内侧，远离轴的外侧和在内侧和外侧之间延伸以与凸轮从动件接合的凸轮表面。 凸轮轴还包括设置在凸轮的外侧的降噪质量块。 质量体构造成在凸轮中建立与第一和第二制动蹄的固有频率不同的固有频率，以减少可听见的噪音。
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公开(公告)号：US10428883B2
公开(公告)日：2019-10-01
申请号：US14802669
申请日：2015-07-17
摘要： A drum brake assembly and method for designing the assembly are provided. The assembly includes a brake spider, a pair of brake shoes pivotally coupled to the brake spider at one end, and a pair of cam followers disposed at opposite ends of the brake shoes. The assembly further includes a camshaft having a shaft disposed along a rotational axis and a cam disposed at one end of the shaft. The cam has an inboard side proximate the shaft, an outboard side distant from the shaft and a cam surface extending between the inboard and outboard sides in engagement with the cam followers. The camshaft further includes a noise reducing mass disposed on the outboard side of the cam. The mass is configured to establish a natural frequency in the cam that differs from a natural frequency of the first and second brake shoes to reduce audible noise.
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