| 摘要 |
PROBLEM TO BE SOLVED: To reduce the production cost of a combine by making the transmission device of a feed chain as an inexpensive one, and also keeping the feed chain in stable speed so as to perform threshing work smoothly. SOLUTION: This feed chain (1) is constituted so as to be driven by the transmission from a stepwise transmission device (2) equipped with transmission ranges having 2 steps of high speed and low speed or more. Based on standard vehicle speed set previously, the stepwise transmission device (2) is constituted to be transmission-controlled so that the stepwise transmission device (2) is switched to a high speed transmission range in a transmission process to the high speed traveling side of a stepless transmission device (3) changing vehicle speed as stepless, and also the stepwise transmission device (2) is switched to a low speed transmission range in the transmission process to the low speed traveling side of the stepless transmission device (3). COPYRIGHT: (C)2008,JPO&INPIT
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