CN218702683U - Hybrid power transmission system and vehicle - Google Patents

Abstract

The utility model provides a hybrid power transmission system and vehicle. The utility model discloses a hybrid power transmission system includes the engine that the transmission links to each other and derailleur and connect in the epaxial motor generator of main shaft of derailleur. The transmission mechanism is arranged between the motor generator and the main shaft along the radial direction of the main shaft, and the motor generator and the main body of the transmission are located on the same side of the transmission mechanism in the axial direction of the main shaft. The utility model discloses a hybrid power transmission system, through set up drive mechanism between the main shaft of derailleur and motor generator, can enlarge the distance between motor generator and the main shaft, arrange derailleur and motor generator in same one side of drive mechanism, make motor generator be located the periphery of derailleur, motor generator will not occupation space alone in the axial of main shaft to can reduce whole drive system at the ascending size of main shaft axial of derailleur, and then for arrangement of driving system on the vehicle facilitates.

Description

Hybrid power transmission system and vehicle

Technical Field

The utility model relates to a hybrid vehicle technical field, in particular to hybrid transmission system. Additionally, the utility model discloses still relate to a vehicle.

Background

In a vehicle transmission system, a transmission is a component for transmitting driving power to a transmission shaft, and various working conditions of the whole vehicle can be met through adjustment and change of a gear ratio. In the related art, as the hybrid technology is developed, the applicable field thereof is increasing, but the hybrid transmission technology applied to the relatively mature light car cannot be applied to the heavy-duty vehicle.

Most of the existing hybrid heavy truck transmissions are of a P2 type (a type that a motor is arranged at the input end of a gearbox and is positioned behind a clutch), namely, a high-power motor is coupled between the heavy truck transmission and the clutch, so that energy recovery and hybrid driving are realized. The scheme has the defects of heavy weight, high cost and the like, and the size of the whole variable speed transmission system is increased more in the axial direction of the transmission. Since the electric machine is located between the clutch and the transmission, the axial length of the transmission needs to be increased, and the traditional fuel heavy-duty vehicle faces a larger space layout challenge in the process of carrying the hybrid transmission. In the commercial cargo field, the conventional hybrid transmission is provided with a high-power motor, so that the self weight of the vehicle is inevitably increased, and the cargo capacity of the vehicle is occupied; however, in the operation of the whole vehicle, the working condition range in which the high-power motor can participate and be realized is limited; resulting in poor mixing and energy-saving effects. Therefore, under the large background of the oil-electric hybrid technology, a hybrid variable-speed transmission system which is suitable for heavy-duty vehicles, low in cost and good in oil saving effect needs to be developed.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a hybrid transmission system, so as to reduce the size of the whole transmission system in the axial direction of the main shaft of the transmission.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a hybrid power transmission system comprises an engine and a transmission which are in transmission connection, and a motor generator connected to a main shaft of the transmission; a transmission mechanism arranged along the radial direction of the main shaft is arranged between the motor generator and the main shaft, and the motor generator and the main body of the transmission are both positioned on the same side of the transmission mechanism in the axial direction of the main shaft.

Further, a motor shaft of the motor generator is arranged in parallel with the main shaft; the transmission mechanism comprises a motor gear arranged on the motor shaft, an input shaft gear arranged on the main shaft, and an idler wheel arranged between the motor gear and the input shaft gear.

Further, an engine output shaft of the engine is coaxially arranged with the main shaft, and a clutch is arranged between the engine output shaft and the main shaft.

Further, the motor generator comprises a first motor generator which is in linkage with the main shaft, and a second motor generator which is selectively in transmission connection with the main shaft.

Furthermore, a gear shifting device is arranged in the transmission, and the second motor generator can be in transmission connection with the main shaft or separated from the transmission connection with the main shaft along with the switching action of the gear shifting device.

Further, the transmission includes a main case portion and an auxiliary case portion; the main shaft comprises an input shaft and an intermediate shaft which are arranged on the main box part, and an output shaft which is arranged on the auxiliary box part; the shifting device is used to change a gear ratio between the input shaft and the output shaft, or between the second motor generator and the output shaft.

Further, the shifting device includes a first shifting device provided on the input shaft, a second shifting device provided between the input shaft and the intermediate shaft, a third shifting device and a fourth shifting device provided on the intermediate shaft, and a fifth shifting device provided between the intermediate shaft and the output shaft.

Further, the input shaft, the intermediate shaft, and the output shaft are coaxially arranged.

Furthermore, a plurality of transmission gears are arranged in the transmission, the transmission gears are respectively arranged on driven shafts in the transmission, and the driven shafts are arranged in parallel to the main shaft.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a hybrid power transmission system, through set up drive mechanism between the main shaft of derailleur and motor generator, can enlarge the distance between motor generator and the main shaft, at this moment, in the axial of main shaft, arrange the main part of derailleur and motor generator in same one side of drive mechanism, make motor generator be located the periphery of derailleur, motor generator will not be occupation space alone in the axial of main shaft, thereby can reduce whole drive system at the ascending size of main shaft axial of derailleur, and then for the arrangement of driving system on the vehicle facilitates.

In addition, the arrangement of the first motor generator and the second motor generator avoids the situation that one high-power motor is independently arranged, can realize multiple different power input coupling modes through two small motors, realizes the driving modes of multiple working conditions, is suitable for the power driving of vehicles under more road conditions, and has better oil-saving effect; and the arrangement of the two low-power motor generators is easy to carry, has lower cost and weight, and is beneficial to optimizing the space arrangement form of the hybrid power transmission system, so that the structure is more compact and the layout is more reasonable.

Another object of the present invention is to provide a vehicle, the vehicle including the hybrid power transmission system of the present invention. The utility model discloses a vehicle has the technical advantage that above-mentioned hybrid transmission system possessed.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions thereof are provided to explain the present disclosure, wherein the related terms in the front, back, up, down, and the like are only used to represent relative positional relationships, and do not constitute an undue limitation of the present disclosure. In the drawings:

fig. 1 is a schematic view of a transmission structure of a hybrid power transmission system according to a first embodiment of the present invention;

description of the reference numerals:

1. an engine; 2. an engine output shaft; 3. a clutch; 4. a first motor generator; 5. a first motor gear; 6. a first motor shaft; 7. a first idler pulley; 8. a first idler shaft;

9. a first input shaft gear; 10. A second input shaft gear; 11. A second idler shaft;

12. a second motor gear; 13. A second motor generator; 14. A second idler pulley;

15. a second constant mesh driven gear; 16. A second normally meshed drive gear; 17. A third constant mesh driven gear; 18. a third normally meshed drive gear; 19. a first constant mesh driven gear; 20. a first normally meshed drive gear;

21. a third gear drive gear; 22. a third-gear driven gear; 23. two-gear driving gear; 24. a second driven gear; 25. a first gear driving gear; 26. a first-gear driven gear; 27. a reverse gear idler wheel; 28. a reverse drive gear; 29. a reverse driven gear;

a1, a main box part; a2, a sub-tank part;

30. the auxiliary box is constantly engaged with the driven gear; 31. the auxiliary box is normally engaged with a driving gear; 32. a first gear driving gear of the auxiliary box; 33. a first-gear driven gear of the auxiliary box; 34. an output shaft; 35. a second motor shaft; 36. an input shaft; 37. an intermediate shaft;

k1, a first gear shifting device; k2, a second gear shifting device; k3, a third gear shifting device; k4, a fourth gear shifting device; k5 and a fifth gear shifting device.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the appearances of the terms "first," "second," and the like, if any, are also intended to be descriptive only and not for purposes of indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a hybrid power transmission system, which is beneficial to reducing the size of the whole transmission system in the axial direction of a main shaft of a speed changer; one exemplary drive configuration is shown in FIG. 1.

In general, the hybrid power transmission system includes an engine 1 and a transmission that are drivingly connected, and a motor generator connected to a main shaft of the transmission. The transmission mechanism is arranged between the motor generator and the main shaft along the radial direction of the main shaft, and the motor generator and the main body of the transmission are located on the same side of the transmission mechanism in the axial direction of the main shaft.

The main body of the transmission described above is the input shaft 36 protruding outside the transmission case, and in the present embodiment, as shown in fig. 1, the transmission includes a main case portion A1, a sub case portion A2, and portions of the input shaft 36 and the output shaft 34 protruding outside the case; the body is referred to as the main case portion A1 and the transmission 2.

Thus, when the transmission mechanism of the motor generator is disposed adjacent to the main casing section A1, the motor generator is disposed at the periphery of the main casing section A1, and shares the space in the axial direction of the main shaft with the main casing section A1, thereby effectively shortening the overall length of the transmission system in the axial direction of the main shaft.

As also shown in fig. 1, an engine output shaft 2 of the engine 1 is arranged coaxially with the main shaft, and a clutch 3 is provided between the engine output shaft 2 and the main shaft. The output shaft 2 of the engine and the main shaft are coaxially arranged, so that a clutch 3 is conveniently arranged between the output shaft and the main shaft; the arrangement of the clutch 3 not only facilitates the connection or disconnection between the engine output shaft 2 and the main shaft, but also facilitates the power switching between the engine output shaft 2 and the motor generator.

Also, the motor shaft of the motor generator of the present embodiment is arranged in parallel with the main shaft; and a certain distance is reserved between the motor shaft and the main shaft, and the transmission mechanism between the motor shaft and the main shaft comprises a motor gear arranged on the motor shaft, an input shaft gear arranged on the main shaft and an idle wheel meshed and transmitted between the motor gear and the input shaft gear. The motor generator and the main shaft are arranged in parallel, so that the transmission mechanism is convenient to install and arrange, and the transmission efficiency and stability between the motor generator and the main shaft are improved.

Meanwhile, the motor generator includes a first motor generator 4 provided in association with the main shaft, and a second motor generator 13 selectively drivingly connected to the main shaft. Specifically, the transmission mechanism between the first motor shaft 6 and the main shaft of the first motor generator 4 includes a first motor gear 5 provided on the first motor shaft 6, a first input shaft gear 9 provided on the input shaft 36 of the main shaft, and a first idle gear 7 meshing-driven between the first motor gear 5 and the first input shaft gear 9; the first idler 7 is rotatably mounted on a first idler shaft 8. The first motor shaft 6 and the input shaft 36 form linkage, the first motor generator 4 can drive the input shaft 36 to rotate, and the engine 1 can drive the first motor generator 4 to operate and generate power when driving the input shaft 36 to rotate. Similarly, the transmission mechanism between the second motor shaft 35 and the main shaft of the second motor generator 13 includes a second motor gear 12 provided on the second motor shaft 35, a second input shaft gear 10 provided on the input shaft 36 of the main shaft, and a second idle gear 14 meshing-driven between the second motor gear 12 and the second input shaft gear 10; the second idler 14 is rotatably mounted on the second idler shaft 11.

The two motor generators of the first motor generator 4 and the second motor generator 13 are arranged, so that the situation that one high-power motor is independently arranged is avoided, multiple different power input coupling modes can be realized through two small motors, the driving modes of multiple working conditions are realized, the power driving under more road conditions of the vehicle is adapted, and the oil saving effect is better; and the arrangement of the two low-power motor generators is easy to carry, has lower cost and weight, and is beneficial to optimizing the space arrangement form of the hybrid power transmission system, so that the structure is more compact and the layout is more reasonable.

In order to change the transmission ratio of the transmission, a gear shifting device is provided in the transmission, and the gear shifting device is operated to shift, so that the transmission ratio of the transmission can be changed, and the second motor generator 13 can be controlled to be linked with the main shaft or be separated from the main shaft. Thus, the second motor generator 13 can be flexibly disconnected from or connected to the main shaft of the transmission, so that different power input coupling modes can be conveniently realized.

Specifically, the transmission includes a main case portion A1 and a sub case portion A2; the main shaft includes an input shaft 36 and an intermediate shaft 37 provided in the main casing section A1, and an output shaft 34 provided in the sub casing section A2. Accordingly, the shifting devices include a first shifting device K1 arranged on the input shaft 36, a second shifting device K2 arranged between the input shaft 36 and the intermediate shaft 37, a third shifting device K3 and a fourth shifting device K4 arranged on the intermediate shaft 37, and a fifth shifting device K5 arranged between the intermediate shaft 37 and the output shaft 34. The gear shifting devices are used for changing the transmission ratio between the input shaft 36 and the output shaft 34 or between the second motor generator 13 and the output shaft 34, and particularly, the engagement or disengagement of the second motor generator 13, the change of the transmission ratio of the second motor shaft 35 to the output shaft 34 under the condition that the second motor generator 13 is engaged, and the change of the transmission ratio of the input shaft 36 to the output shaft 34 are completed by matching of the various gear shifting devices. The transmission is designed into two parts, the main shaft is correspondingly arranged into an input shaft 36, an intermediate shaft 37 and an output shaft 34, and flexible switching of multiple gears can be realized through the configuration of a plurality of gear shifting devices, so that the transmission can realize power transmission with multiple transmission ratios.

In a transmission arrangement inside the transmission, a transmission scheme as shown in fig. 1 is preferably employed. The transmission is internally provided with a plurality of transmission gears, one part of the transmission gears are arranged on the main shaft, the other part of the transmission gears are respectively arranged on a plurality of driven shafts in the transmission, and all the driven shafts are arranged in parallel with the main shaft. On the transmission path of the second motor generator 13, the second input shaft gear 10 is rotatably sleeved on the input shaft 36, the second input shaft gear 10 and the second normally meshed driving gear 16 rotate synchronously, and the second normally meshed driving gear 16 simultaneously drives the two second normally meshed driven gears 15 to rotate. The driven shafts of the two second normally meshed driven gears 15 are provided with a third normally meshed driven gear 17, a second gear driving gear 23, a first gear driving gear 25 and a reverse gear driving gear 28 which can synchronously rotate along with the second normally meshed driven gears 15, wherein the third normally meshed driven gear 17 is meshed with the third normally meshed driving gear 18 on the input shaft 36, the second gear driving gear 23 is meshed with the second gear driven gear 24 on the intermediate shaft 37, the first gear driving gear 25 is meshed with the first gear driven gear 26 on the intermediate shaft 37, and the reverse gear driving gear 28 is in meshed transmission with the reverse gear driven gear 29 on the intermediate shaft 37 through the reverse gear idler gear 27. Meanwhile, on the transmission path of the input shaft 36 and the intermediate shaft 37, the first constant mesh driving gear 20 on the input shaft 36 is in transmission connection with the third-gear driven gear 22 on the intermediate shaft 37 through the first constant mesh driven gear 19 and the third-gear driving gear 21; on the transmission path between the intermediate shaft 37 and the output shaft 34, the auxiliary box constant mesh driving gear 31 on the intermediate shaft 37 is in transmission connection with the auxiliary box first gear driven gear 33 on the output shaft 34 through the auxiliary box constant mesh driven gear 30 and the auxiliary box first gear driving gear 32.

Preferably, the input shaft 36, the intermediate shaft 37 and the output shaft 34 described above are arranged coaxially. The input shaft 36, the intermediate shaft 37 and the output shaft 34 are coaxially arranged, so that each driven shaft can be parallel to the main shaft and spaced from the main shaft, the configuration of the transmission gears between the main shaft and each driven shaft is facilitated, the transmission performance of the transmission gears can be more stable, and the operation stability of the transmission under various transmission ratios can be improved.

Based on the arrangement of the multiple sets of transmission gears on each transmission path, the input shaft 36 can be alternatively linked with the second normally meshed driving gear 16 or the third normally meshed driving gear 18 by operating the first gear shifting device K1, the intermediate shaft 37 can be linked with the input shaft 36 or the intermediate shaft 37 can be linked with the third-gear driven gear 22 by operating the second gear shifting device K2, the intermediate shaft 37 can be linked with the second-gear driven gear 24 or the intermediate shaft 37 can be linked with the first-gear driven gear 26 by operating the third gear shifting device K3, the intermediate shaft 37 can be linked with or separated from the reverse-gear driven gear 29 by operating the fourth gear shifting device K4, and the intermediate shaft 37 can be linked with the output shaft 34 or the output shaft 34 can be linked with the first-gear driven gear 33 of the auxiliary box by operating the fifth gear shifting device K5. In this way, the transmission can be flexibly controlled to shift between various gear ratios, between forward and reverse, and between engagement and disengagement of the second motor generator 13.

In summary, in the hybrid power transmission system of the embodiment, the transmission mechanism is disposed between the main shaft of the transmission and the motor generator, so that the distance between the motor generator and the main shaft can be increased, and at this moment, the transmission and the motor generator are disposed on the same side of the transmission mechanism in the axial direction of the main shaft, so that the motor generator is located at the periphery of the transmission, and the motor generator does not occupy space in the axial direction of the main shaft alone, thereby reducing the size of the whole transmission system in the axial direction of the main shaft of the transmission, and further facilitating the arrangement of the power system on the vehicle.

Example two

The embodiment relates to a vehicle which adopts the hybrid power transmission system provided by the first embodiment.

In the hybrid power transmission system of the vehicle, the first idler gear 7 and the second idler gear 14 are arranged, and the distance between the first motor generator 4 and the second motor generator 13 and the input shaft 36 is enlarged, so that the two motor generators can be arranged in a back-back mode, and the purpose of reducing the size of the hybrid power transmission system in the axial direction of the main shaft is achieved by increasing the size of the hybrid power transmission system in the radial direction of the main shaft; in this way, great convenience is provided for the arrangement of the power lines on the vehicle.

In addition, multiple different power input coupling modes can be realized through the two small electric generators, flexible driving under multiple working conditions is realized, and therefore the vehicle can adapt to more road conditions. In addition, the hybrid power transmission system has the advantages of compact structure, reasonable layout, easy arrangement on a vehicle, low cost and weight, good oil saving effect and the like.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A hybrid powertrain system includes an engine (1) and a transmission that are drivingly connected, and a motor generator connected to a main shaft of the transmission; the method is characterized in that:

a transmission mechanism arranged along the radial direction of the main shaft is arranged between the motor generator and the main shaft, and the motor generator and the main body of the transmission are positioned on the same side of the transmission mechanism in the axial direction of the main shaft.

2. The hybrid powertrain system of claim 1, wherein:

a motor shaft of the motor generator is arranged in parallel with the main shaft;

the transmission mechanism comprises a motor gear arranged on the motor shaft, an input shaft gear arranged on the main shaft, and an idler wheel arranged between the motor gear and the input shaft gear.

3. The hybrid powertrain system of claim 1, wherein:

an engine output shaft (2) of the engine (1) is coaxially arranged with the main shaft, and a clutch (3) is arranged between the engine output shaft (2) and the main shaft.

4. The hybrid powertrain system of any one of claims 1 to 3, wherein:

the motor generator comprises a first motor generator (4) which is linked with the main shaft, and a second motor generator (13) which is selectively connected with the main shaft in a transmission way.

5. The hybrid powertrain system of claim 4, wherein:

the transmission is internally provided with a gear shifting device, and the second motor generator (13) can be in transmission connection with the main shaft or separated from the transmission connection with the main shaft along with the switching action of the gear shifting device.

6. The hybrid powertrain system of claim 5, wherein:

the transmission comprises a main box portion (A1) and an auxiliary box portion (A2);

the main shaft comprises an input shaft (36) and an intermediate shaft (37) provided in the main box portion (A1), and an output shaft (34) provided in the sub-box portion (A2);

the gear shift device is used for changing the transmission ratio between the input shaft (36) and the output shaft (34) or between the second motor generator (13) and the output shaft (34).

7. The hybrid powertrain system of claim 6, wherein:

the shifting device comprises a first shifting device (K1) arranged on the input shaft (36), a second shifting device (K2) arranged between the input shaft (36) and the intermediate shaft (37), a third shifting device (K3) and a fourth shifting device (K4) arranged on the intermediate shaft (37), and a fifth shifting device (K5) arranged between the intermediate shaft (37) and the output shaft (34).

8. The hybrid powertrain system of claim 6, wherein:

the input shaft (36), the intermediate shaft (37) and the output shaft (34) are arranged coaxially.

9. The hybrid powertrain system of claim 6, wherein:

the transmission is provided with a plurality of transmission gears, each driven shaft in the transmission is provided with the transmission gear, and the driven shafts are arranged in parallel to the main shaft.

10. A vehicle, characterized in that:

the vehicle employs the hybrid power transmission system of any one of claims 1 to 9.

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