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江苏省从50年代初开始推广人力脱粒机,到70年代末达到30万台,以后逐渐减少。取而代之的是由电动机或柴油机带动的机动脱粒机,60年代末投放市场,推广速度迅猛,至1990年底全省保有量已达90万台。机动脱粒机的主要型号有工农-700、5TZ-72、南三-52等,这些都是简易型。其特点是:(1)结构简单,只有脱粒装置,没有清选分离机构。(2)价格低廉,约300～800元一台。(3)生产率高,每小时可脱粒1000～1500千克。这类脱粒机脱出物中含有大量短茎秆和杂余,农民还需将脱出物清扬、筛选,费工费时。其次,脱粒滚筒及其他旋转部分外露,容易将操作者的手、衣物等卷入,造成人身事
Since the early 1950s, Jiangsu Province started to promote human threshers, reaching 300,000 units by the end of the 1970s and gradually decreasing. Replaced by motor or diesel powered motor thresher, put on the market in the late 1960s, the promotion speed, by the end of 1990 the province has reached 900,000 units. Main types of mobile thresher workers and peasants -700,5 TZ-72, South San -52, etc., these are simple type. Its characteristics are: (1) simple structure, only threshing device, there is no clear separation mechanism. (2) low price, about 300 ~ 800 yuan a. (3) high productivity, threshing 1000 to 1500 kg per hour. This type of thresher prolapse contains a large number of short stalks and impurities, farmers also need to prolapse Chhnang, screening, time-consuming work. Secondly, the threshing drum and other rotating parts are exposed, so that the operator’s hand, clothing,