Parallel dual-motor differential power dividing continuously variable transmission system

Abstract

The invention discloses a parallel dual-motor differential power dividing continuously variable transmission system. The parallel dual-motor differential power dividing continuously variable transmission system is connected with an engine output shaft and comprises the engine output shaft, a first motor, a second motor, a motor controller, a differential mechanism, a clutch, a gearbox, a power output shaft and a storage battery; the first motor and the second motor are arranged in parallel, the engine output shaft transmits power of the engine to the first motor for generating electricity, meanwhile, the engine output shaft outputs power outwards to form a first power path through the differential mechanism, the clutch and the gearbox, the first motor supplies power to the second motor andthe storage battery through the motor controller, and the second motor outputs power outwards to form a second power path through the differential mechanism, the clutch and the gearbox. Accordingly,two power paths of mechanical power and electric power can be achieved.

Description

Technical field [0001] The present invention relates to a continuously variable transmission system, in particular to a continuously variable transmission system (EMCVT) with parallel dual-motor differential power split. Background technique [0002] The existing transmission system (take a tractor as an example) is divided into manual shift transmission system, power uninterrupted automatic shift transmission system, and hydraulic mechanical continuously variable transmission system (HMCVT) according to the shift mode. [0003] 1. Manual shift transmission system: [0004] When tractors work in the field, due to the large changes in land resistance and the large changes in the load of the whole machine, tractors with manual shifting transmission systems need to frequently stop and change gears to meet the traction and speed requirements of farm implements. Staff work intensity is high, and work efficiency is low. The quality is unstable; at the same time, the engine speed is direct...

AI Technical Summary

Problems solved by technology

[0013] (1) Tractors with manual shifting transmission systems need to stop and shift frequently to meet the traction and speed requirements of farm implements. The work intensity of employees is high, the work efficiency is low, and the work quality is unstable.

[0014] (2) The engine speed is directly related to the vehicle speed. The change of vehicle speed leads to a wide range of engine speed changes. The engine cannot work in a stable and economical speed range, resulting in high fuel consumption, poor emissions, and large vibration wear.

[0016] (1) The engine speed of the transmission system is directly related to the vehicle speed. Vehicle speed changes lead to a large range of engine speed changes, and the engine cannot work in a stable and economical speed range, resulting in high fuel consumption, poor emissions, and large vibration wear

[0017] (2) The transmission system structure requires a large number of clutches and proportional valves. With the increase of use time, the clutch wear increases, the shift control time changes, the ride comfort becomes poor, and shift shock occurs

[0018] (3) The traditional power shift gearbox is a single-power route with a staged transmission. To achieve a super crawling gear (ultra-low speed), a lot of complicated reduction gear trains need to be added

Moreover, stepless transmission cannot be realized during major operations such as rotary tillage, that is, it cannot match the optimal driving speed of the rotary tiller in theory.

[0019] (4) At present, the technologies of these systems are basically mastered by foreign companies and mainly rely on imports. The price of the transmission system is high, it is difficult to reduce the price, and the maintenance cost is high

[0021] (1) The mechanical transmission system consisting of 4-6 gears is a transmission mechanism composed of a multi-row differential mechanism and 4-6 wet clutches or brakes. The structure is complex, the parts processing requirements are high, and the cost is high.

[0022] (2) The hydraulic power distribution system composed of hydraulic precision couplings has very high requirements for assembly cleanliness, use cleanliness, and maintenance cleanliness, and requires special hydraulic oil, which is expensive to use and maintain

[0023] (3) Since the technologies of these systems are basically mastered by foreign companies, the products mainly rely on imports, which are costly and difficult to reduce prices

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