【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20210426
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True or False: Idler gears affect the transmission ratio of a gear train. (X) For the daily question activity in the moving equipment section, please reply within three days. Correct answers earn rewards ranging from 5 to 15 points; those who provide detailed answers receive additional rewards. Those who get it wrong score no points. All forum members are welcome to participate actively and support the development of the forum! ! !
Error: The idler does not change the value of the transmission ratio; rather, it changes the direction of transmission. The idler serves two purposes: 1. To change the direction； 2. Achieving center distance. For example, in a car’s reverse gear, the direction of rotation of the gears in the transmission is different from that in forward gear; therefore, idler gears are needed.