Automatic manual power shift with power reversing transmission box

Abstract

The invention discloses a manual-automatic integrated power shifting and power reversing transmission box, which includes a main shifting gear box, a power reversing device and a shifting auxiliary gear box connected in sequence. The automatic manual power shift transmission box with power reversal provided by the present invention has a compact structure, is easy to assemble, has smooth power output, has dense power shift gears in a high frequency range of use, and can effectively adapt to resistance changes. It meets the power demand, has high transmission efficiency, good power and economy, and can adapt to the technical requirements of automatic control. It cooperates with the electro-hydraulic control system to achieve manual-automatic control requirements, and any forward gear in the transmission box only undergoes two stages of deceleration. , less gear meshing times and high mechanical efficiency.

Description

technical field [0001] The invention belongs to the technical field of tractors, and in particular relates to a manual-automatic integrated power shifting belt power reversing transmission box. Background technique [0002] Due to the characteristics of the operation mode of high-power tractors, there are currently three types of transmission boxes used by tractors with power greater than 147kW in the world: hydrostatic power split continuously variable transmission, full power shift transmission, and partial power shift transmission. [0003] The above three types of transmission boxes have their own advantages and disadvantages: the hydrostatic power split continuously variable transmission has the function of stepless speed regulation, and has the best adaptability to various operating conditions, but the efficiency of the hydraulic transmission part is low; The gear transmission can realize the uninterrupted power during the shifting process between any gears, but the de...

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Problems solved by technology

[0003] The above three types of transmission boxes have their own advantages and disadvantages: the hydrostatic power split continuously variable transmission has the function of stepless speed regulation, and has the best adaptability to various operating conditions, but the efficiency of the hydraulic transmission part is low; The gear transmission can realize the uninterrupted power during the shifting process between any gears, but the design of more gears will make the structure of the gearbox too complicated, and the design of too few gears is not conducive to adapting to the change of resistance during operation, and cannot effectively use the engine. Power and it is difficult to achieve energy-saving effect; some power shift transmissions have the characteristics of uninterrupted power and relatively simple structure in the section, but the power will be interrupted during the section change process, and each section needs to share the power shift part. The gear ratio of the power shift must be consistent with that of other sections, which is not conducive to matching the speed ratio according to the characteristics of the tractor.

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