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我公司承修的一台２４３kW高驱动推土机，由于平衡梁橡胶减振块在使用中损坏，造成两侧行走叉头限位键槽严重磨损，最深处达１５～２０mm。磨损前后的叉头如图１所示。键槽正常使用的受力情况：叉头由摆架支承、支承套和尾套组成，叉头内部装有张紧弹簧、顶杆和张紧液压缸。每
The 243kW high-powered bulldozer which our company undertakes repair, due to the damage of the balance beam rubber damping block in use, resulting in serious wear and tear of the keyway on the both sides of forkhead limit, the deepest reach 15 ~ 20mm. Fork head before and after wear as shown in Figure 1. Keyway normal use of the force situation: the fork by the pendulum support, bearing sleeve and tail sleeve composition, the fork inside with a tension spring, mandrel and tension hydraulic cylinder. each