1米~3挖掘机托架滑板,原结构如图1所示用两根M24螺栓从托架端穿下,将其紧固在托架上。这种联接,在使用过程中由于受挖掘振动,滑板自重及推压力等作用,经常松动,短时间内即用铸铁滑板丝扣损坏而报废。一台挖掘机每年消耗十几块滑板,几十根M24螺栓,损失600多元,每年还损坏托架一副,价值500 1 m ~ 3 excavator bracket skateboards, the original structure shown in Figure 1 with two M24 bolts worn from the bracket end, to be fastened to the bracket. This connection, due to the excavation of the use of vibration, self-weight skateboards and push the role of pressure, often loose, that is, a short time with the cast iron skateboard thread damage and scrapped. An excavator consumes a dozen skateboards a year, dozens of M24 bolts, loss of 600 yuan, each year also damaged a bracket, the value of 500