Gear combined type variable-speed transmission device

Abstract

The invention relates to a gear combined type variable-speed transmission device. The gear combined type variable-speed transmission device consists of an input shaft, an output shaft, an intermediate shaft, clutches (or synchronizers) and gears. More than 6 clutches or one clutch and more than 6 synchronizers and more than 9 gears are combined in serial-parallel connection modes, the gear number is remarkably increased, and the number of shifting gears is decreased. Due to the fact that each pair of gears has small speed ratio and adopts a short transmission shaft structure, the rigidity of a transmission is improved, the radial and axial sizes are reduced, and the transmission is compact in structure and high in mechanical efficiency. The invention further provides a reverse gear device used on a mechanical variable-speed transmission mechanism.

Description

technical field [0001] The invention relates to a mechanical speed change transmission device, in particular to a combined speed change transmission device of a clutch, a synchronizer and a gear. Background technique [0002] Currently, there are three main types of automatic transmissions used in automobiles: hydraulic automatic transmission (AT), electromechanical automatic transmission (AMT) and mechanical continuously variable automatic transmission (CVT). In the field of electronically controlled mechanical automatic transmission, there is also a variable speed transmission method, that is, dual-clutch automatic transmission (DSG). The mechanical automatic transmission (AMT) is based on the manual transmission, and an automatic control device is added to control the clutch and select the gear pair on the fixed shaft system for automatic gear shifting. The electro-hydraulic automatic transmission (AT) has a series of planetary gear trains and multiple clutches and brake...

AI Technical Summary

Problems solved by technology

The electro-hydraulic automatic transmission (AT) has a series of planetary gear trains and multiple clutches and brakes, which can automatically shift gears through electronically controlled hydraulic drive, but the structure and control system are complicated, the transmission efficiency is low, and the parts are difficult to process Large, high manufacturing and maintenance costs

The mechanical continuously variable transmission (CVT) can realize continuous stepless speed regulation, but the transmission torque is small, the processing and manufacturing precision of the parts is high, and the manufacturing is difficult. Because of its inherent friction transmission characteristics, the transmission efficiency is low, but due to the stepless speed change The advantages of better matching between transmission and engine make up for the disadvantages of friction transmission

The dual-clutch transmission (DSG) has the advantages of simple structure, high transmission efficiency, rapid and smooth shifting of uninterrupted power, etc., but the coaxial dual clutch with single input and double output has complex structure, difficult control and high manufacturing precision due to its structural characteristics. , the axial length is too long, the speed ratio of each pair of gears is too large, resulting in large radial dimensions, the number of gears available is small, and the number of gears is too large when the number of gears is provided.

[0003] The currently used transmission reverse gear mechanism has the disadvantages of many parts, large structure size and high cost

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