Automatic manual power shift with power reversing transmission box

Abstract

The invention discloses a manual and automatic integrated power shift driving force reversing transmission case comprising a shift speed change main case, a power reversing device and a shift speed change auxiliary case which are connected sequentially. The manual and automatic integrated power shift driving force reversing transmission case provided by the invention is compact in structure and easy to assemble, power output is smooth, intensive power shift gears are achieved within a high-use-frequency speed range, the manual and automatic integrated power shift driving force reversing transmission case can effectively adapt to resistance change, power needs are met, transmission efficiency is high, power performance and economy are good, the manual and automatic integrated power shift driving force reversing transmission case can adapt to automatic control technical requirements and is matched with an electrohydraulic control system to meet the manual and automatic integrated controlrequirements, in addition, any forward gear is only subjected to double reduction in the transmission case, the number of times of gear meshing is small, and mechanical efficiency is high.

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...

AI Technical Summary

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.

Images