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车辆用的衬套主要用于基础制动装置,它的体积小,结构简单,常不被人们重视。但是由于它是一个易耗件,使用数量非常大,据估计全国客车上约有630万个,货车上约有880万个,如果按一个厂修期计算,则年消耗量客车约105万个,货车约220万个。由于我国车型繁多,衬套的尺寸也比较杂乱。为了克服这种状态,铁道部于1975年指
Vehicle bushing is mainly used for basic brake device, its small size, simple structure, often not be valued. However, since it is a consumable item, the quantity used is very large. It is estimated that there are about 6.3 million passenger cars in the country and about 8.8 million trucks. If the calculation is based on a factory repair period, the annual consumption of passenger cars is about 1.05 million About 2.2 million trucks. Due to the large number of models in our country, the size of bushings is also more messy. In order to overcome this situation, the Ministry of Railways referred to it in 1975