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(1)一台五征牌三轮农用运输车,只能挂4挡以下的低速挡,而高挡挂不上,当副变速杆由慢挡变快挡时,马上就自动脱挡,打开变速箱检查发现副变速轴最右边(往前进方向看)与快慢挡滑动齿轮相啮合的主动小齿轮严重磨损报废,与滑动齿轮相啮合的齿轮厚度,磨损得只剩下不到2mm,有个别齿已经完全折断,只剩齿根。而造成该齿轮磨损如此严重的原因:一是发现该副变速小齿轮与滑移齿轮只有全齿宽的1/3相啮合,不是完全啮合。这样一来,该齿轮就只有很小部分传递动力,承受载荷,长时间承受碰撞,冲击等很容易加速磨损。
(1) A Wuzheng brand three-wheeled agricultural truck can only hang low gear below the 4th gear, but the high gear can not hang up. When the auxiliary shift lever changes from the slow gear to the fast gear, it will automatically disengage and open Gearbox inspection found that the right side of the auxiliary shift shaft (to the forward direction of view) with the fast gear sliding gear meshing pinion serious wear and tear scrap, gear meshing with the sliding gear wear, worn only less than 2mm, there are individual Tooth has been completely broken, leaving only the root. The gear wear caused so serious reason: First, it was found that the auxiliary gear and slip gear only one third of the full tooth width engagement, not fully engaged. As a result, the gear is only a small part of the transfer of power, bear the load, bear the collision for a long time, the impact is easy to accelerate wear and tear.