过去使用的貨車推进机,都是在杠杆前端安装楔片或靴片,頂着車輪使貨車移动。它的缺点是:与車輪的接触点产生滑动,損伤輪箍,且因用手工操作,推进起动力不足。 为了克服上述缺点,提出了一种貨車推进机。 在一个机架上安装有操纵杆,机架前部装动輪,后部装从輪,能在輪道上走动。搖动操 In the past, the truck propulsion machines were all equipped with wedges or shoes at the front of the levers to move the truck against the wheels. Its disadvantage is: the contact point with the wheel slip, damage the wheel, and because of manual operation, the lack of propulsion. In order to overcome the above shortcomings, a truck propulsion machine is proposed. In a rack mounted lever, the front wheel mounted wheel, rear mounted wheel, can walk on the wheel. Shake exercise