Dual-drive two-gear automatic transmission

A technology of automatic transmission and speed ratio, which is applied in the direction of vehicle gearbox, transmission box, transmission element, etc., can solve the problems of large speed ratio difference between two gears, complex structure, weakened endurance, etc., and achieve smooth and smooth shifting process. The effect of high transmission efficiency and simple structure

Inactive Publication Date: 2017-01-04
吕宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The speed of the motor is much faster than that of the engine, and there is no gearbox, so the speed of the vehicle can only be increased by increasing the speed of the motor, which greatly improves the performance requirements of the motor. At the same time, at high speed, the energy consumption Greatly improved, battery life has been weakened
Therefore, there is the problem that pure electric vehicles equipped with fixed gear ratio reducers are not economical, and the ideas of major electric vehicle manufacturers are constrained by the theory that "electric vehicles do not need transmissions". Therefore, in order to improve the battery life of electric vehicles, currently Most manufacturers are pinning their hopes on major breakthroughs in battery technology or the use of electric motors with better performance (such as higher power and higher speed). Not the optimal way, specifically: under normal circumstances, the price of battery packs will account for 35% to 40% of the total price of electric vehicles, so the use of new technologies or battery packs with larger capacities will inevitably increase the cost of electric vehicles And its own weight; and the use of motors with better performance will not only greatly increase the cost of electric vehicles, but also a major test for the transmission system of electric vehicles. Therefore, with the gradual development of electric vehicle technology in recent years , especially since 2015, the world's pure electric vehicle researchers have abandoned the concept of "pure electric vehicles do not need a gearbox, only rely on the inherent characteristics of the motor, and it is fully satisfied with the reducer", and formed a unified consensus : For pure electric vehicles, the gearbox is not a "superfluous", but "icing on the cake", and can greatly improve the performance of pure electric vehicles
[0004] Although R&D personnel are aware of the necessity of using transmissions in electric vehicles

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] like figure 1 As shown, the dual-drive two-speed automatic transmission includes a casing (not shown in the figure) and a reduction mechanism arranged in the casing. The reduction mechanism includes: a driving gear shaft 2, a driving gear 1, and an intermediate gear 5 meshing with the driving gear 1 , The intermediate gear 5 is fixed on the intermediate gear shaft 6 . On the intermediate gear shaft 6, the first driven gear 3 and the second driven gear 4 are fixed simultaneously, and the first driven gear 3 and the second driven gear 4 are arranged on both sides of the intermediate gear 5 respectively, and are simultaneously provided with The first driving gear 7 meshed with the first driven gear 3 and the second driving gear 9 meshed with the second driven gear 4, the first driving gear 7 and the second driving gear 9 are respectively installed on the independent first driving gear shaft 8 and the second driving gear shaft 10. On both sides of the driving gear shaft 2...

Embodiment 2

[0046] The difference between Embodiment 2 and Embodiment 1 is that in this embodiment, a set of dual-drive two-speed automatic transmissions as shown in Embodiment 1 are respectively arranged on the front axle and the two rear axles of the electric vehicle, so that four driving motors (respectively denoted as drive motor A, drive motor B, drive motor C, and drive motor D) realizes the separate drive of the front axle and rear axle of the electric vehicle, and can control four different drive motors through different logics, so that Electric vehicles can have multiple speed ratios and multiple power driving states, which can respectively reach fifteen speed ratios and fifteen different power combinations: A, B, C, D, AB, AC, AD, BC, BD, CD , ABC, ACD, ABD, BCD, ABCD. At the same time, it is very simple to realize timely four-wheel drive.

Embodiment 3

[0048] like figure 2 As shown, the difference between Embodiment 3 and Embodiment 1 is that the third driven gear 11 and the third driving gear are added to the above-mentioned first primary reduction mechanism composed of the first driving gear 7 meshing with the first driven gear 3 12, wherein the third driven gear 11 meshes with the first driving gear 7, the third driving gear 12 meshes with the first driven gear 3, and the third driven gear 11 and the third driving gear 12 are installed on the second intermediate gear at the same time on axis 13. Between the first driving gear shaft 8 and the intermediate gear shaft 6, a second intermediate gear shaft 13, a third driven gear 11, and a third driving gear 12 are added to realize high speed ratio transmission. The speed ratio can reach hundreds to one or higher.

[0049] In the first primary deceleration mechanism, two-stage deceleration or multi-stage deceleration is set, which can realize more abundant speed ratio settin...

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PUM

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Abstract

The invention discloses a dual-drive two-gear automatic transmission, and belongs to the technical field of electric automobiles. The dual-drive two-gear automatic transmission is characterized by comprising a speed reduction gear set, an input gear of the speed reduction gear set is connected with two power input mechanisms at the same time, and the two power input mechanisms drive the input gear to transmit at the different speed ratios. According to the dual-drive two-gear automatic transmission, a speed reduction mechanism and the two power input mechanisms engaged with the speed reduction mechanism at the same time are arranged, through switching of the power input mechanism, an output gear of the speed reduction mechanism transmits at the different speed ratios, gear shifting and speed change of an electric automobile during driving can be achieved, the phenomenon that in the prior art, the gear shifting process can be completed through gear switching is avoided, the gear shifting process is smoother, and due to the fact that the structure is quite simple, the beneficial effect of high transmission efficiency is achieved.

Description

technical field [0001] A dual-drive two-speed automatic transmission belongs to the technical field of electric vehicles. Background technique [0002] With the increasing shortage of resources in today's society and the call of the national energy conservation and emission reduction policy, electric vehicles are accepted by more and more people as a new type of transportation. Compared with the engine (internal combustion engine) of ordinary cars, the electric motor of electric vehicles has the biggest advantage: the energy efficiency range of electric motors is much larger than that of engines, so in electric vehicles, there is no need to equip multi-gear gears in ordinary cars. The gearbox can meet the driving requirements of electric vehicles in most road conditions. Therefore, in the prior art, most electric vehicles realize the drive of the electric vehicle by the electric motor by setting a reducer between the electric motor and the wheels, and the electric vehicle T...

Claims

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Application Information

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IPC IPC(8): F16H57/02F16H3/08F16H3/10
CPCF16H57/02F16H3/001F16H3/08F16H3/10F16H2200/0021F16H2200/0034
Inventor 张振明高小群吕宏
Owner 吕宏
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