农业机械常用键有平键、月牙键、滑键、花键,楔键5种。在农机保养维修中,如果拆装不当,易造成机件损坏或形成事故隐患。下面谈谈各种键的装配方法及拆卸时的注意事项: 1.平键的装配装配后,平键的两侧应有一定的过盈量,键的顶面和轮毂之间应留有间隙,键的底面应与轴上的键槽良好接触。轮毂、轴、键装配时若过紧,可以锉修,但不能有松动,否则易使键剪切损坏。 2.月牙键的装配月牙键一般用在轴径较小的轴 Common keys for agricultural machinery are flat keys, crescent keys, sliding keys, splines, wedge key 5 species. In the maintenance of agricultural machinery, if improper disassembly, easy to cause damage to the mechanical parts or the formation of accidents. The following talk about the assembly of various keys and demolition of the Notes: 1. Flat key assembly assembly, the flat key on both sides of a certain amount of interference should be key top and hub should leave a gap between the , The bottom of the key should be good contact with the keyway on the shaft. If the hub, shaft, key assembly too tight, you can file repair, but can not be loose, otherwise easy to make the key cut damage. 2. Crescent key assembly Crescent keys are generally used in smaller shaft diameter