CN215590478U

CN215590478U - Series-parallel two-gear gearbox assembly and hybrid electric vehicle

Info

Publication number: CN215590478U
Application number: CN202120999132.5U
Authority: CN
Inventors: 邵奎柱; 余平; 李建文; 郭卫杰; 曹浦
Original assignee: Jing Jin Electric Technologies Beijing Co Ltd
Current assignee: Jing Jin Electric Technologies Beijing Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-01-21
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a series-parallel two-gear gearbox assembly and a hybrid electric vehicle, wherein the gearbox assembly comprises an engine, a generator, a driving motor, a transmission mechanism, a clutch and a differential mechanism; an output shaft of the engine is coaxially connected with a first shaft in the transmission mechanism; the driving motor and the generator are coaxially provided with gears, and the gears are in meshing transmission with the gears on the first shaft; the transmission mechanism further comprises a fourth shaft, and two gears are arranged on the fourth shaft and are respectively meshed with the gears on the first shaft. The engine can realize power output of two speed transmission ratios, and high-efficiency output is realized in both a medium-speed region and a high-speed region; the gear switching process can be completed by utilizing the speed regulation characteristic of the generator, in the two speed ratio switching processes of the engine, the driving motor is always connected with the wheel end, the driving force of the wheel end is not interrupted, and the gear shifting process is smoother; the driving motor can realize three-stage driving, can set a larger speed transmission ratio and can give consideration to the output of high rotating speed.

Description

Series-parallel two-gear gearbox assembly and hybrid electric vehicle

Technical Field

The utility model belongs to the technical field of automobile transmission design, and particularly relates to a series-parallel two-gear gearbox assembly and a hybrid electric vehicle.

Background

Hybrid Electric Vehicles (HEV) generally refer to Hybrid Electric Vehicles (HEV), i.e., conventional internal combustion engines (diesel engines or gasoline engines) and Electric motors are used as power sources, and some engines are modified to use other alternative fuels, such as compressed natural gas, propane and ethanol fuel. Hybrid vehicles are generally classified into three categories according to the coupling manner of hybrid drive:

the series hybrid electric vehicle is mainly composed of three power assemblies of an engine, a generator, a driving motor and the like which are connected in series to form a power system of the vehicle.

Secondly, the engine and the driving motor of the parallel hybrid electric vehicle are both power assemblies, and the power of the two power assemblies can be output in a mutual superposition manner or can be output independently.

And the series-parallel hybrid electric vehicle is an electric vehicle which is formed by integrating series and parallel structures and mainly comprises three power assemblies, namely an engine, a motor-generator and a driving motor.

The hybrid electric vehicle can effectively reduce fuel consumption, the hybrid electric vehicle can combine the characteristics of a motor and an engine to develop a special gearbox with few gears, the gearbox with a fixed speed ratio is popular due to simple control, however, the existing engine has a fixed speed ratio, and a high-efficiency area can only be taken into consideration of a medium-speed area or a high-speed area, so that more flexible power output cannot be realized.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention discloses a series-parallel two-speed transmission assembly and a hybrid vehicle to overcome or at least partially solve the above problems.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a series-parallel two-gear gearbox assembly, which comprises an engine, a generator, a driving motor, a transmission mechanism, a first clutch, a second clutch and a differential mechanism, wherein the engine is connected with the generator through a transmission mechanism; wherein,

an output shaft of the engine is coaxially connected with a first shaft in the transmission mechanism, and a first clutch, a second clutch and a plurality of gears are arranged on the first shaft;

an output shaft of the driving motor is coaxially connected with a second shaft in the transmission mechanism, an eighth gear is arranged on the second shaft, an output shaft of the generator is coaxially connected with a third shaft in the transmission mechanism, a ninth gear is arranged on the third shaft, and the eighth gear and the ninth gear are respectively in meshing transmission with a gear on the first shaft;

the transmission mechanism further comprises a fourth shaft, wherein a second gear and a fifth gear are arranged on the fourth shaft and are respectively meshed with two gears on the first shaft for transmission, a third gear is arranged on the fourth shaft and is meshed with a fourth gear on the differential mechanism.

Optionally, a tenth gear is fixedly arranged on the first shaft and in meshing transmission with the ninth gear, and a seventh gear is further sleeved on the first shaft and in meshing transmission with the eighth gear.

Optionally, still the cover is equipped with first gear and sixth gear on the primary shaft, first gear with fix on the fourth epaxial second gear meshing transmission, the sixth gear with fix on the fourth epaxial fifth gear meshing transmission.

Optionally, the first clutch is used for controlling connection between the first gear and the first shaft, and the second clutch is used for controlling connection between the sixth gear or the seventh gear and the first shaft.

Optionally, the first gear is disposed proximate to the engine.

Optionally, the first shaft, the second shaft, the third shaft and the fourth shaft are parallel to each other.

Optionally, the sixth gear and the seventh gear are coupled to the first shaft through a first floating shaft.

Optionally, the transmission assembly drive mode comprises any one of: pure electric motor drive, series drive, parallel drive, low-grade engine drive, high-grade engine drive or brake recovery.

Optionally, the gearbox is provided with two output half shafts, and the two output half shafts are respectively connected with the left wheel and the right wheel.

In another aspect, the utility model provides a hybrid electric vehicle, wherein the hybrid electric vehicle adopts any one of the gearbox assemblies.

The utility model has the advantages and beneficial effects that:

the engine can realize the power output of two speed transmission ratios of the engine, and realize high-efficiency output in both a medium-speed region and a high-speed region; in the process of switching the two speed ratios of the engine, the driving force of the vehicle is not interrupted; the driving motor can realize three-stage driving, can set a larger speed transmission ratio and also can give consideration to the output of high rotating speed.

In addition, the technical scheme can adopt different engine driving speed transmission ratios according to the working conditions of the vehicle; the adaptability is stronger, the proportion of directly driving the vehicle in the high-efficiency area of the engine at a medium-speed section and a high-speed section can be effectively balanced, and the reduction of the transmission efficiency caused by power split is reduced; the engine is provided with two gears, and the speed transmission ratio can be flexibly set according to the vehicle requirement; the driving motor is decelerated to the wheels through three stages, a large speed ratio can be set, the trend of high rotating speed and high power density of the motor is met, the specification of the motor can be reduced by introducing the large speed ratio, the weight of the gearbox is reduced, and the cost is reduced.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a parallel-series two-speed transmission assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a series-parallel two-speed transmission assembly according to another embodiment of the utility model.

In the figure: c1 is a first clutch, C2 is a second clutch, Z1-Z10 are respectively a first gear-a tenth gear, 1 is a first shaft, 2 is a second shaft, 3 is a third shaft, 4 is a fourth shaft, 5 is a differential, 6 is a driving motor, 7 is a generator, 8 is a first floating shaft, 9 is a second floating shaft, 10 is an output half shaft, and 11 is a shock absorber or a clutch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is to be understood that the terms "comprises/comprising," "consisting of … …," or any other variation, are intended to cover a non-exclusive inclusion, such that a product, device, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, device, process, or method if desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," or "comprising" does not exclude the presence of other like elements in a product, device, process, or method that comprises the element.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1-2, an embodiment of an aspect of the present invention discloses a series-parallel two-speed transmission assembly, which includes an engine, a generator 7, a driving motor 6, a transmission mechanism, a first clutch, a second clutch, and a differential 5; preferably, the gearbox assembly is a front-drive gearbox assembly.

As can be seen from fig. 1, the output shaft of the engine is coaxially connected to a first shaft 1 in the transmission mechanism, and the first shaft 1 is provided with a first clutch C1, a second clutch C2 and a plurality of gears, including a first gear Z1, a sixth gear Z6, a seventh gear Z7 and a tenth gear Z10.

The output shaft of the driving motor 6 is coaxially connected to the second shaft 2 in the transmission mechanism, and the eighth gear Z8 is provided on the second shaft 2, but of course, the eighth gear Z8 may be directly provided on the output shaft of the driving motor 6, and the eighth gear Z8 may mesh with the seventh gear Z7 provided on the first shaft 1.

The output shaft of the generator 7 is coaxially connected to the third shaft 3 of the transmission, and a ninth gear Z9 is provided on the third shaft 3, and similarly, the ninth gear Z9 may also mesh with a gear on the first shaft 1, such as a ninth gear Z9. The transmission mechanism further comprises a fourth shaft 4, a second gear Z2 and a fifth gear Z5 are arranged on the fourth shaft 4, the second gear Z2 and the fifth gear Z5 are respectively in meshing transmission with two gears (Z1 and Z6) on the first shaft 1, a third gear Z3 is arranged on the fourth shaft 4, and the third gear Z3 is in meshing engagement with a fourth gear Z4 arranged on the differential 5.

A damper or clutch 11 may also be provided on the engine output shaft.

Through the integral arrangement, the engine can realize power output of two speed transmission ratios, and high-efficiency output is realized in both a medium-speed region and a high-speed region; the driving motor can realize three-stage driving, can set a larger speed transmission ratio and also can give consideration to the output of high rotating speed.

Specifically, a tenth gear Z10 is fixedly arranged on the first shaft 1 and is in meshing transmission with the ninth gear Z9, a seventh gear Z7 is further sleeved on the first shaft and is in meshing transmission with the eighth gear Z8, and the seventh gear Z7 can be controlled in engagement through a clutch.

Furthermore, a first gear Z1 and a sixth gear Z6 are further sleeved on the first shaft, the first gear Z1 and the second gear Z2 fixed on the fourth shaft 4 are in meshing transmission through a second floating shaft 9, and the sixth gear Z6 and the fifth gear Z5 fixed on the fourth shaft 4 are in meshing transmission.

Preferably, with continued reference to fig. 1 and 2, a first clutch C1 is used for meshing engagement control of the first gear Z1, and a second clutch C2 is provided on the side of the sixth gear Z6 or the seventh gear Z7 and is used for meshing engagement control of the sixth gear Z6 or the seventh gear Z7.

Specifically, the first gear Z1 is disposed adjacent to the engine.

As can be seen from fig. 1 or 2, the first shaft 1, the second shaft 2, the third shaft 3 and the fourth shaft 4 are parallel to each other.

And the sixth gear Z6 and the seventh gear Z7 are fixedly connected through a first floating shaft 8 sleeved on the first shaft.

Referring to fig. 1, the position of the transmission is shown in the position of the dotted line in fig. 1, and two output half shafts 10 are arranged on the transmission, and the two output half shafts 10 are respectively connected with a differential and left and right wheels.

The transmission assembly drive mode comprises any one of the following: pure electric motor drive, series drive, parallel drive, low-grade engine drive, high-grade engine drive or brake recovery. The speed ratio of whether the engine participates in driving or not is controlled by clutches C1 and C2, and the series-parallel gearbox totally relates to seven transmission paths:

1. driving motor output power path: drive motor → Z8 → Z7 → Z6 → Z5 → Z3 → Z4;

2. engine low gear output power path (C2 pull-in, C1 separate): engine → Z7 → Z6 → Z5 → Z3 → Z4;

3. the engine high gear output power path (C1 pull-in, C2 separate): engine → Z1 → Z2 → Z3 → Z4;

4. the power generation path of the generator is as follows: engine → Z10 → Z9 → generator;

5. generator output power path 1(C1 pull-in, C2 separate): generator → Z9 → Z10 → Z1 → Z2 → Z3 → Z4;

6. generator output power path 2(C2 pull-in, C1 separate): generator → Z9 → Z10 → Z7 → Z6 → Z5 → Z3 → Z4;

7. transmission path during energy feedback: wheel → Z4 → Z3 → Z5 → Z6 → Z7 → Z8 → drive motor.

The working state of each power source is shown in the following table:

in conclusion, the technical scheme can adopt different engine driving speed transmission ratios according to the working conditions of the vehicle; the adaptability is stronger, the proportion of directly driving the vehicle in the high-efficiency area of the engine at a medium-speed section and a high-speed section can be effectively balanced, and the reduction of the transmission efficiency caused by power split is reduced; the engine is provided with two gears, and the speed transmission ratio can be flexibly set according to the vehicle requirement; the driving motor is decelerated to the wheels through three stages, a large speed ratio can be set, the trend of high rotating speed and high power density of the motor is met, the specification of the motor can be reduced by introducing the large speed ratio, the weight of the gearbox is reduced, and the cost is reduced.

The embodiment of the other aspect of the utility model also discloses a hybrid electric vehicle which adopts the gearbox assembly.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A series-parallel two-gear gearbox assembly is characterized in that the gearbox assembly comprises an engine, a generator, a driving motor, a transmission mechanism, a first clutch, a second clutch and a differential mechanism; wherein,

2. The gearbox assembly according to claim 1, wherein a tenth gear is fixedly arranged on the first shaft and is in meshing transmission with the ninth gear, and a seventh gear is further sleeved on the first shaft and is in meshing transmission with the eighth gear.

3. A transmission assembly according to claim 2 wherein said first shaft is further journalled in a first gear in meshing engagement with said second gear fixed to said fourth shaft and in a sixth gear in meshing engagement with said fifth gear fixed to said fourth shaft.

4. A gearbox assembly according to claim 3, in which the first clutch is used to control the connection of the first gear to the first shaft and the second clutch is used to control the connection of the sixth or seventh gear to the first shaft.

5. A transmission assembly according to claim 3, wherein the first gear is located adjacent the engine.

6. A transmission assembly according to claim 3 wherein the first, second, third and fourth shafts are parallel to one another.

7. A transmission assembly according to claim 3 wherein the sixth and seventh gears are coupled to the first shaft by a first floating shaft.

8. A gearbox assembly according to claim 7, wherein the gearbox assembly drive mode comprises any one of: pure electric motor drive, series drive, parallel drive, low-grade engine drive, high-grade engine drive or brake recovery.

9. A gearbox assembly according to claim 7, wherein the gearbox is provided with two output half shafts, the two output half shafts being connected to left and right wheels respectively.

10. A hybrid vehicle, characterized in that it employs a gearbox assembly according to any one of claims 1 to 9.