CN2848617Y - Improved power transmission system - Google Patents

Abstract

An improved power transmission system includes an engine, an electric motor and a transmission device thereof, and the engine, the electric motor and the transmission device thereof are structures for realizing pure engine drive or pure motor drive or parallel drive of the engine and the electric motor. The clutch is connected to the output end of the engine and the input shaft of the metal belt drive at the same time, the output shaft of the metal belt drive is connected to the main reducer, and the output element of the final reducer is connected to the differential; the active element of the clutch is connected to the input shaft of the metal belt drive, and the passive element The gear is connected to the ring gear of the planetary transmission device, and the sun gear is connected to the motor; the utility model does not have the impact vibration caused by the reverse flow of power and then turns to the forward flow, and the structure is simple and compact; it is easy to realize pure stepless Variable speed and hybrid continuously variable transmission working mode, so as to improve the power performance, fuel economy and emission performance of the vehicle.

Description

An Improved Power Transmission System

technical field

The utility model belongs to the field of vehicle engineering and relates to a power transmission system.

Background technique

The hybrid power transmission system refers to a power transmission route where the engine directly drives the wheels through a continuously variable transmission device, and the other route drives the electric motor through a continuously variable transmission system to drive the wheels. The engine and the motor can also be used as a power source to drive the wheels together; transmission The device consists of metal belts - planetary gears and clutch devices, etc., please refer to the example in Figure 1. In the 4th issue of "Vehicle and Power Technology" magazine in 2000, an article entitled "Research on the Continuously Variable Transmission Scheme of Parallel Hybrid Electric Vehicles" was published, which introduced the relevant structures, existing problems and tried to propose solutions The method has the disadvantages of complex structure and the inability to avoid the reverse flow of power flow.

Utility model content

The purpose of the utility model is to provide an improved integrated transmission structure applicable to hybrid power, which overcomes the above-mentioned shortcomings of the prior art.

In order to achieve the above object, the solution of the utility model is: an improved power transmission system, including an engine, an electric motor and a transmission device thereof. The transmission device includes a clutch, a metal belt transmission device, and an intermediate transmission device. The output end and the input shaft of the metal belt drive, the motor and the output shaft of the metal belt drive are connected to the intermediate transmission device, and the intermediate transmission device is connected to the driving wheel.

Further, the intermediate transmission device includes: gears, planetary transmissions, gear sets, final reducers, differentials, the output shaft of the metal belt drive is connected to the final drive, and the output element of the final drive is connected to the differential; the active drive of the clutch The element is connected to the input shaft of the metal belt drive, the passive element is connected to the gear, the gear is connected to the ring gear of the planetary gear, the sun gear is connected to the motor, the planet carrier is connected to the driving gear of the gear set, and the passive gear of the gear set is connected to the active element of the clutch , the passive element of the clutch is connected to the output shaft of the metal belt, and then connected to the final reducer, which is connected to the driving wheel.

The motor is a structure that can be converted into a generator, and connected to the power battery pack can convert regenerative braking energy into electricity and store it in the power battery pack.

Due to the adoption of the above scheme, the utility model has the following advantages: there is no impact vibration caused by the reverse flow of power and then turning to the forward flow, and there is no need to add clutches to solve such problems, the structure is simple and clear; the system is simplified The structure makes the structure compact; it is easy to realize pure continuously variable transmission and hybrid continuously variable transmission working modes, thereby improving the power performance, fuel economy and emission performance of the vehicle.

Description of drawings

Fig. 1 is a schematic diagram of a transmission structure of a parallel hybrid electric vehicle.

Fig. 2 is a schematic structural view of an embodiment of the utility model.

Detailed ways

Please refer to Fig. 2, a kind of embodiment of the utility model, its transmission structure can realize simple engine drive or parallel drive or simple motor drive when being used for hybrid electric vehicle. It includes: engine (1), three clutches (2) (4) (9), metal belt transmission (3), gear (5), planetary gear transmission (6), motor (7), gear set ( 8), final drive (13), differential (11) and two wheels (10) (12) form. The clutch (2) connects the output end of the engine (1) and the input shaft of the metal belt drive (3) at the same time, the output shaft of the metal belt drive is connected to the final drive (13), and the output element of the final drive is connected to the differential (11) The active element of the clutch (4) is connected to the input shaft of the metal belt transmission, the passive element is connected to the gear (5), and the gear (5) is connected to the ring gear of the planetary gear (6), and the sun gear is connected to the motor (7). The planet carrier is connected to the driving gear of the gear set (8), the driven gear of the gear set (8) is connected to the active element of the clutch (9), and the passive element of the clutch (9) is connected to the output shaft of the metal belt, and then connected to the final reducer Drive the wheels.

When the vehicle starts, the clutch (2) is disconnected to cut off the connection with the engine; the clutch (4) and (9) are combined, and the motor (7) directly drives the vehicle to start.

When the vehicle is started and exceeds the idle speed of the engine, the clutch (2) is combined to drag the engine to start. After the engine runs smoothly, the clutches (4) and (9) are disconnected, and the system is driven by the engine.

When the vehicle is in an acceleration or climbing condition, the clutches (4) and (9) are connected, and the motor provides auxiliary power under the condition that the engine is running in an economical condition.

The motor (7) is a structure that can be converted into a generator, connected with the power battery pack to convert the regenerative braking energy into electricity and store it in the power battery pack; when the vehicle decelerates and brakes or goes downhill, disconnect the clutch (2 ), the engine (1) is turned off, the motor (7) becomes a generator for regenerative braking, and the regenerative braking energy is stored in the power battery pack.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be made to these embodiments and the general principles described here can be applied to other embodiments without creative effort. Therefore, the utility model is not limited to the embodiments here, and the improvements and modifications made by those skilled in the art according to the disclosure of the utility model should be within the protection scope of the utility model.

Claims (3)

1. An improved power transmission system, including an engine, an electric motor and a transmission device thereof, is characterized in that: the transmission device includes a clutch, a metal belt transmission, and an intermediate transmission, and the clutch is connected to the output end of the engine and the metal belt transmission at the same time. The input shaft, the output shaft of the electric motor and the metal belt drive are connected to an intermediate transmission device, and the intermediate transmission device is connected to drive wheels. 2. The improved power transmission system according to claim 1, characterized in that: the intermediate transmission device includes: gears, planetary transmissions, gear sets, final reducers, differentials, output shaft joints of metal belt transmissions The main reducer, the output element of the main reducer is connected to the differential; the active element of the clutch is connected to the input shaft of the metal belt drive, the passive element is connected to the gear, the gear is connected to the ring gear of the planetary gear, the sun gear is connected to the motor, and the planet carrier The driving gear of the gear set is connected, the driven gear of the gear set is connected to the active element of the clutch, and the passive element of the clutch is connected to the output shaft of the metal belt, and then connected to the final drive, which is connected to the driving wheel. 3. The improved power transmission system according to claim 1 or 2, characterized in that: the motor is a structure that can be converted into a generator, and connected with the power battery pack can convert the regenerative braking energy into electricity and store it in the power battery group.