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1.改进原因在进行平地机的日常维护和保养时,需要将发动机机罩1打开。原平地机发动机罩的开闭都是通过手动泵和升降缸3来实现的。升降缸3为双作用液压缸,其上端固定在机罩支座2上,下端固定在机架支座4上。手动泵泵油后,压力油驱动升降缸3伸缩,即可实现发动机罩1的开闭,如附图a所示。由于手动泵排量小,双作用液压缸活塞作用面积较大,故升降缸3伸缩动作缓慢,造成
1. Reason for improvement When carrying out routine maintenance and service of grader, it is necessary to open the engine cover 1. The opening and closing of the original grader bonnet are achieved by hand pump and lift cylinder 3. The lifting cylinder 3 is a double-acting hydraulic cylinder, the upper end of which is fixed on the hood support 2 and the lower end of the lifting cylinder is fixed on the stand support 4. Manual pump oil, the pressure oil-driven lifting cylinder 3 telescopic, you can achieve the opening and closing of the hood 1, as shown in Figure a. Due to the small displacement of the manual pump, double action hydraulic cylinder piston larger area, so the lifting cylinder 3 telescopic action is slow, resulting in