Three-clutch gearbox for small and medium loaders

Abstract

The invention relates to a three-clutch transmission of small and medium loading machines. The three-clutch transmission comprises a gear shifting and speed changing part of a hydraulic clutch, a hydraulic control system and a gear box part, wherein a power output end of a shaft IV of the gear shifting and speed changing part of the hydraulic clutch is connected with a power input end of a shaft V of the gear box part through a transmission shaft. Gear shifting and speed changing is achieved mainly through the hydraulic clutch, gear shifting and speed changing achieved by shifting a gear is adopted, therefore, transmission is high, gear shifting operation is flexible and stable, the required output work speeds of various gears can be obtained.

Description

technical field [0001] The invention relates to a gearbox mainly used for small and medium-sized loaders. Background technique [0002] The gear shifting frequency of the loader is very high during work, which requires the transmission to be light, flexible and easy to operate when shifting gears. At present, the transmission of large and medium-sized loaders is a hydraulic torque converter plus a power shift transmission. Due to the low transmission efficiency of the hydraulic torque converter, the fuel consumption of the loader is relatively high; part of the energy consumption is converted into heat, which increases the temperature of the transmission oil. high. The small loader gearbox is driven by a hydraulic torque converter, which is generally not used due to lower efficiency. At present, small loaders still use a mechanical gearbox, which is a gear shift gearbox. The working efficiency of the mechanical gearbox is low, the shifting operation is labor-intensive, an...

AI Technical Summary

Problems solved by technology

The working efficiency of the mechanical gearbox is low, the shifting operation is labor-intensive, and the lower speed required for the work cannot be obtained, and the engine is easy to stall when overloaded

[0003] The Chinese invention patent with the authorized announcement number CN102146987B discloses a "engineering machine equipped with a power shift gearbox". Due to its own structural design, there are four defects in use: first, the gearbox must obtain a relatively low Ideal speed requires a large enough transmission ratio

Second, there are also certain restrictions on the speed ratio of the transmission axle equipped with the construction machine, and the speed ratio generally does not exceed 1:21.

In order to solve this problem, the meshing delay system is adopted to solve the problem of meshing impact, but the shifting time is prolonged, which affects the working efficiency of the construction machine

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