摘要
本设计主要针对目前城市公交公司、商贸和银行关于钱币的分类、清点、整理需求而设计。目前以上场合的钱币分类主要依赖于人工，人力成本高且效率低下。本机械设备的主要功能是对混杂在一起的各种纸币和硬币进行分类、清点、整理。本设计准确、实用。可部分或者全部替代人工，减少人力成本。
本设计的创新点主要有：（1）功能齐全，可同时实现硬币和纸币的分类、清点、整理。（2）结构紧凑，该设计中各模块排列紧凑。（3）该设计过程采用模块化设计，较多采用成熟技术，开发周期短。可靠性高。
本文运用大学所学的知识，提出了人民币清分机的结构组成、工作原理以及主要零部件的设计中所必须的理论计算和相关强度校验，构建了人民币清分机的设计总的指导思想，从而得出了该人民币清分机的设计的优点是高效，经济。
 
关键词：钱币；机械设备；钱币自动分类；经济

Abstract
    In today's society, bus as travel tools have become increasingly popular, both on the road in the city or in the Township Road, but bus cashbox too dull, serious impact on the special passengers coin, relative to those tall, due to the box of money is short, so the coin is not very convenient, likewise, for their shorter passengers, due to the fixed height of the bus fare boxes, passengers were much taller, equally convenient coin. So many problems of the traditional fixed bus box brings is a problem we must solve the current. And if we can equipped with a large number of bus intelligent cashbox in bus, those problems will be greatly avoided described above, to those special passengers a convenient and comfortable travel environment.
    The design of the intelligent bus cashbox, mainly through AT89S51 MCU control system intelligent cashbox automatic lifting control, can be through the height of the test sensor passenger to realize the intelligent bus cashbox according to passengers of the height of the lift, panel using high quality 304 stainless steel production, environmentally friendly, generous.
 
Key word: The bus box is convenient; microcomputer control; lifting;
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