The present invention relates to a lawnmower blade structure for a lawnmower, the lawnmower blade is pivotally arranged in a rotary disc through a pivot part, the pivot part comprises a stationary post and a retaining cap wherein a first fastening aperture is perforated on the circumferential edge of the rotary disc for the stationary post to pass through correspondingly, so that the bottom part of the stationary post is disposed inside the first fastening aperture the bottom end of the stationary post and the bottom surface of the rotary disc surrounding the bottom end of the stationary post are welded to form a welding part for fixing the stationary post which protrudes from the top surface of the circumferential edge of the rotary disc for the pivot hole of the lawnmower blade to sleeve through correspondingly, and a gasket is sleeved on the stationary post, the surroundings of the gasket and the lawnmower blade on the periphery of the gasket are welded to form a welding part wherein the retaining cap is longitudinally perforated with a second fastening aperture, the retaining cap is sleeved on the stationary post, and the top end of the stationary post is lower than the top end of the second fastening aperture of the retaining cap, the stationary post and the top end of the retaining cap are welded to form a welding part, so as to retain the lawnmower blade on the stationary post and pivotally arranged on the top surface of the rotary disc to improve the stability and safety of the lawnmower blade at high speed rotation.本發明係關於一種割草機之除草刀結構,該除草刀藉由樞接部樞設於旋轉盤上,所述樞接部包含固定柱及固定帽;其中,旋轉盤圓周邊緣穿設有第1固定孔,供固定柱對應穿入,令固定柱底部設置於第1固定孔內;該固定柱底端及其底端周圍之旋轉盤底面焊接形成有焊接部,以將固定柱固設突出於旋轉盤之頂面圓周邊緣上,提供除草刀之樞接孔對應套入,且固定柱上套設有墊片,墊片四周邊緣及其外圍之除草刀焊接形成有焊接部;其中,固定帽縱向穿設有第2固定孔,固定帽套設於固定柱上,且固定柱頂端低於固定帽之第2固定孔之頂端,固定柱與固定帽頂端焊接形成有焊接部,以將除草刀限位於固定柱上並樞設於旋轉盤頂面上,提高除草刀高速轉動之穩定性與安全性。(1)‧‧‧割草機(2)‧‧‧除草刀(3)‧‧‧旋轉盤(5)‧‧‧樞接部(51)‧‧‧固定柱(52)‧‧‧墊片(53)‧‧‧固定帽(530)‧‧‧第2固定孔(6)‧‧‧焊接部
