Gear shifting control method, gear shifting control system and loading machine

Abstract

The invention belongs to the technical field of engineering mechanisms, and discloses a gear shifting control method, a gear shifting control system and a loading machine. The gear shifting control method is used for controlling the gear shifting control system and comprises the following steps that a current gear of a gearbox is obtained, and whether gear shifting needs to be conducted on the gearbox or not is judged; and if the gearbox needs to be subjected to gear shifting, a gear shifting instruction is executed, the gearbox is controlled to be disengaged from the current gear, then the current vehicle speed of a whole vehicle is obtained, the input rotating speed of a driving motor is controlled to be adjusted to the target gear rotating speed corresponding to the current vehicle speed of the whole vehicle for speed regulation of the driving motor, and when the driving motor conducts speed regulation, gear combination of a clutch is controlled. According to the gear shifting control method, according to the principle that the current vehicle speed of the whole vehicle is kept unchanged, gear combination is carried out on the gearbox, gear combination is carried out under the condition that the vehicle speed of the whole vehicle is kept unchanged, and therefore no gear shifting impact exists in the walking shovel loading operation process of the gearbox.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a shift control method, a shift control system and a loader. Background technique [0002] At present, the power source of the loader comes from the engine, and the torque and speed are adjusted through the shifting of the gearbox assembly, and then transmitted to the drive axle and wheels to realize the functions of the loader's walking and shoveling operations. [0003] When the loader needs to shift gears, after the current gear is out of gear, it will cut into the next gear. according to figure 1 The traction characteristic curve shown shows that the smooth shift points are points A, B and C (that is, when the gears are combined, the input speed is equal to the output speed). It is difficult to accurately find A, B and C points to shift gears, which will inevitably lead to shift shocks. There is a shifting shock in the gearbox, which brings great discomfort t...

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