Relates mower protective cover is installed to protect the blade is mounted to the drive shaft of the working rod of the lawn mower, the present invention, the circumferential protruding portion having a relatively larger diameter than the diameter of rotation of the blade Insert the upper part of the insertion portion formed with a shaft through-hole protection plate is installed at the bottom of the blade is formed to be separated from each other along the drive shaft of the mower blade to penetrate sandwiched hollow bearing binding rings to be used for combining the bearing insertion portion to support the inner ring of the bearing is mounted a support portion for close contact with the bottom surface of the mower blade is formed to have an outer diameter so as to extend from the parts, the outer surface of the lower portion of the insertion portion and a shaft support member having, but inner surface following the shaft through hole of the insertion portion from the upper surface of the support portion to the second groove portion having a first inner diameter and a first groove portion, and is extended downward from the first groove portion When, to have a third groove portion that is extended downward so as to have a second inner diameter first smaller than the inner diameter at the bottom of the second groove portion, a third inner diameter which is extended from the second inner diameter in the third groove portion I comprises a bearing unit which is formed to have a fourth groove portion which is extended downward. According to the bearing unit applied thereto and mower protective cover such, it is possible to support the drive shaft while minimizing the separation of the drive shaft with respect to the outer diameter difference of the cutter drive shaft of the mower It has a structure, providing the advantage of being able to increase the fastening force of the mowing machine.本発明は、草刈機の作業棒の駆動軸に設置される刃を保護するために設置される草刈機用保護カバーに関し、刃の回転直径より相対的に大きい直径を有する突出部が円周方向に沿っ
