郑珍对《考工记》车舆系统的图形述说

郑珍《轮舆私笺》二卷专为注解《考工记》之轮人、舆人、轿人三职，另附《轮舆图》一卷，共有图九幅。其中三幅为郑珍所绘，另外六幅为其子郑知同所绘，而郑知同也只是将其父郑珍的文字叙述变成了更为直观的图形解说，图之精髓仍在郑珍。择其中之《牙围图》、《毂辐牙合材图》、《车舆全图》和《轿合衡度数图》四图进行解析，不时切换古车制系统之轮牙、车舆、车毒舟的空间概念，可见郑珍对《考工记》之车舆系统的图形述说。

Zheng Zhen’s Graphic Illustration of Vehicles’ System in his Notes o f Vehicle Mechanicians

The two volumes of Private Notes of Wheels and Vehicles written by Zheng Zhen are the specific annotations to his Notes of Vehicle Mechanicians about wheel mechanicians, vehicle mechanicians and shaft mechanicians attached with a volume of Illustrations of Vehicles of nine pictures. Three of the illustrations were drawn by Zheng Zhen, and the other six by his son Zheng Zhitong. However, Zheng Zhitong just transformed his father＇s word illustration into more specific graphic illustrations and the core still existed in Zheng Zhen＇s creation. This paper chooses four drawings - ＂Drawing of Outer Wheels＂, ＂Drawing of Hub, Spoke and Outer Wheels＂,＂Drawing of Vehicles＂, and ＂Drawing of Shaft Balance Degree＂ to conduct analysis, and also gives the analysis of the space connotation of wheels, vehicles and vehicle shafts in the ancient vehicle system; thus, Zheng Zhen＇s graphic illustration of vehicles＇ system in Notes of Vehicle Mechanicians can be clearly illustrated.