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1.改进前的结构及缺陷(1)结构改进前,推土机发动机侧门、蓄电池柜侧门以及各类操纵箱门与机罩铰接方式均采用普通合页,如图1a所示。每个合页用8个小螺栓或铆钉分别安装在门板和门框侧面,合页轴外露在外侧,如图1b所示。(2)缺陷推土机侧门主要起防护作用,都是大尺寸的薄板件。推土机工作环境非常恶劣,其工作过程中常伴有强烈振动。在此工况下,过薄的普通合页容易变形,合页销轴外露容易锈蚀,合页螺栓或铆钉过小容易松脱。合页的上述损伤,造成侧门下垂、门框撕裂或脱落,使侧门
1. Before the improvement of the structure and defects (1) Before the structural improvement, bulldozer engine side door, battery cabinet side door and various types of control box door and hood hinges are used ordinary hinge, as shown in Figure 1a. Each hinge with 8 small bolts or rivets were installed in the door and door frame side, hinge shaft exposed on the outside, as shown in Figure 1b. (2) Defective bulldozer side door mainly from the protective effect, are large-size sheet metal parts. Bulldozers working environment is very poor, often accompanied by a strong vibration in the course of their work. In this condition, the normal hinge is too thin and easily deformed, the hinge pin is easily exposed, and the hinge bolt or rivet is too small to be easily loosened. The hinge of the damage, causing the side door drooping, tearing or falling door, so that the side door