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1 现状 东风4 型和东风5型机车砂箱盖锁闭销由螺杆和元宝螺母组成。在乘务员每次检查砂箱存砂数量时 ,需把元宝螺母松开 ,检查完后再紧固。每台机车 8个砂箱 ,一次检查需 2～ 3分钟 ,十分不方便。2 锁闭销的改进 改进后的锁闭销由螺杆、外套、弹簧、螺母、防尘堵组成 (
1 status quo Dongfeng 4 and Dongfeng 5 locomotive sand box cover locking pin by the screw and ingot nut composition. Each time the flight attendant checks the amount of sand storage sand, the need to loosen the ingot nut, check and then tighten. Each car eight sand boxes, a check takes 2 to 3 minutes, very inconvenient. 2 locking pin to improve the improved locking pin by the screw, jacket, spring, nut, dust plug (