This creation is that a kind of related grass trimmer of what slides guiding device,Owner wants what chassis inner face group to be equipped with angle deflecting unit,And the what angle deflecting unit group is connected to bearing,Its axis hole of the what bearing is socketed with beam barrel again,And the cutterhead shaft of grass trimmer is made to correspond to the lockhole of interlocking what beam barrel,Thereby,When the blade rotation that cutterhead its shaft drive group connects,Beam barrel is also driven by its shaft of cutterhead and is rotated,And idle running is formed at what bearing,And it is remain stationary chassis,It is steadily advanced with benefit support cutterhead,Separately when ground pit run-off the straight is passed through on chassis,The angle deflecting unary system being then connected with group with chassis is tilted with chassis,The cutterhead and blade being separately connected with group with angle deflecting unit through beam barrel can then keep state perpendicular to the ground,Enter ground to avoid blade oblique cutting,Pit-hole is dug out on ground,Or impact is made to arrive stone,Stone bullet is caused to fly,Or blade breakages fly out and wait danger,Accordingly,Ensure in order to reaching using real benefits such as upper safeties.本創作係有關於一種割草機之滑行導引裝置，係主要於底盤內面組設有角度變向單元，並於該角度變向單元組接有軸承，又於該軸承其軸孔套接有軸筒，且使割草機之刀具頭轉軸對應鎖接於軸筒之鎖孔，藉此，當刀具頭其轉軸帶動組接之刀片旋轉時，軸筒亦受刀具頭其轉軸帶動而轉動，並於軸承處形成空轉，而使底盤保持靜止，以利支撐刀具頭平穩行進，另當底盤行經地面凹坑處發生傾斜時，則與底盤相組接之角度變向單元係同底盤傾斜，另與角度變向單元經軸筒相組接相組接之刀具頭及刀片則可保持與地面垂直狀態，以避免刀片斜插入地面，將地面挖出坑洞，或使擊打到石頭，造成石頭彈飛，或刀片斷裂飛出等危險，據此，俾達到確保使用上安全性等實質效益。
