1米~3挖掘机斗杆连接器,原是用硬杂木镶装在里面(图1),用8个M24螺栓通过连接器,将两斗杆连接在一起。后来为便于加工更换,改成用4个M45螺栓连接。这种连接器在使用的过程中,由于受挖掘力的作用,扭力相当大,使用很短的时间,木材就碎裂了。因此,螺栓不能起连接作用,两斗杆不能成一整体,产生晃动使推压小齿轮磨损十分严重,只用一个多月就需更换。1979年有一台挖掘机就曾经更换了14对推压小齿轮。为此,我们进行了改进,利用回收的旧运输机皮带,代替木材,把 1 m ~ 3 excavator arm connector, originally installed in hardwood mosaic inside (Figure 1), with 8 M24 bolts through the connector, the two arms connected together. Later, to facilitate the process of replacement, changed to 4 M45 bolts. This connector in the use of the process, due to the role of digging force, torque is quite large, in a very short period of time, the wood fragments. Therefore, the bolt can not play a connecting role, the two sticks can not be integrated, resulting in rocking the push pinion wear is very serious, only need more than a month to be replaced. In 1979, an excavator had replaced 14 pairs of push pinions. To this end, we have made improvements to utilize recycled old conveyor belt instead of wood