The shift of the small excavator transmission means that the transmission transmission mechanism automatically jumps into neutral from a certain traveling gear, so that the machine's traveling speed is out of control. The harm of transmission jump gear is greater, and measures should be taken in time to prevent accidents.

1. Analysis of transmission jump gear. The small excavator mostly uses a mechanical shift transmission mechanism, which relies on the sliding gear sleeve to move axially in the fixed gear sleeve r, and engages with the driven gear of each gear to achieve the shift. In the process of frequent shifting, the end face of the teeth of the above-mentioned meshing gears is easy to be ground into a cone. It reduces the meshing performance and leads to jump. Sudden changes in external load can cause its transmission to jump. When the road surface is uneven, the machine is running downhill or the driving route is improper and the external load suddenly changes, the sudden change of the load will act on the gear gear of the transmission through the wheel and the drive shaft, so that the gear gear park of the gear gear will generate axial thrust and leave, resulting in the transmission jump. When the small excavator is driving on the ramp, if it is improperly operated, it will also cause the transmission to jump.

2, work process jump processing. Jump gear when driving on a level road. It can be stopped according to the normal stopping points, carefully find the Harfield, and eliminate the fault: when the jump gear occurs when driving uphill, the gear can be placed in the low speed position or the 1 gear position, and then stop when the machine travels to the top of the slope, and eliminate the fault; If the gear reduction is not successful or the jump gear occurs again, it should be stopped according to the action essentials and requirements of the ramp stop, and then remove the fault; Jump gear when driving downhill. The gear should be placed at a high-speed position or take measures to seize the gear (emergency alkali gear) according to the action essentials of the gear, and then stop the machine after driving to the bottom of the slope to check and eliminate the fault; If the gear is not successful or the fork is a jump stop (at this time for the house), the driver can control the engine speed at medium speed (to prevent the engine from stutter), use the point chop method to make the machine slide to the bottom of the slope, and then remove the fault. If the block is not successful or the jump block occurs again (at this time, it is neutral), and the machine is under the large slope (at this time, the machine will dive to the bottom of the slope at the speed of the root), it should be quickly stopped in accordance with the action essentials of the downhill stop and the requirements of the stop, and then eliminate the barrier.

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