CN213472777U - Two-gear double-motor three-planet-row hybrid power system - Google Patents

Abstract

The utility model discloses a two grades of bi-motor three planet row hybrid power system relates to driving system technical field. The system comprises an engine, a flexible connector, a central shaft, a first hollow shaft, a second hollow shaft, a first gear ring, a first planet row, a second planet row, a third planet row, a first motor and a second motor; the central shaft, the first hollow shaft, the second hollow shaft, the first planet row, the second planet row, the third planet row, the first motor and the second motor are all arranged in the shell; the first hollow shaft is sleeved on the central shaft, and the second hollow shaft is sleeved on the first hollow shaft. The utility model has the characteristics of the axial length size of assembly is little, and whole motor size reduces, and the motor arrangement mode can be applicable to different motorcycle types, and has different mode switch, satisfies different operating modes' user demand etc.

Description

Two-gear double-motor three-planet-row hybrid power system

Technical Field

The utility model relates to a driving system technical field, especially a two grades of bi-motor three planet row hybrid power system.

Background

Simple planetary gear mechanisms are the basis of speed change mechanisms, and the speed change mechanisms of the conventional automatic transmissions are composed of two or more rows of planetary gear mechanisms. The planetary gear mechanism has the characteristic of multiple degrees of freedom, and two motors are additionally utilized in a hybrid power assembly system to limit the degrees of freedom. The rotating speed and the torque of the engine are completely decoupled through the two motors, so that the working point of the engine can be freely controlled, stepless speed change is realized, and the fuel economy of a hybrid power assembly system is improved to the maximum extent.

With the development of new energy, hybrid electric vehicles with low emission and green energy consumption gradually become the development trend of the current automobile industry, at present, two or more planetary gear trains are adopted to be combined in the market, although the structure combination of the hybrid electric system is more free by adopting a plurality of planetary gear trains, the configuration of the hybrid electric system is complex and diversified, and the complexity and the diversity of the influencing factors of the power flow direction in the system and the system efficiency are increased. For example, in the existing new energy city public transport bus, the applied planet row hybrid power assembly system is mainly a coaxial arrangement scheme of double motors and double planet rows, and the following problems mainly exist:

(1) the highest rotating speeds of the two driving motors are low, the peak torque is large, and the motor cost is high;

(2) the coaxial arrangement scheme causes the power assembly to have larger axial length, high requirement on arrangement space and poor adaptability to vehicle types;

(3) the system can only be applied to urban buses alone, cannot be adapted to long-distance buses simultaneously, and can realize direct driving of vehicles by the engine, but the application probability of the direct driving of the vehicle by the engine is very low, and the vehicle type adaptability is poor.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a two grades of bi-motor three planet row hybrid power system, the purpose reaches in order to solve among the prior art power assembly axial length, and motor cost is high, and spatial arrangement requires highly, and adaptability is poor, the poor scheduling problem of motorcycle type suitability.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a two-gear double-motor three-planet-row hybrid power system comprises an engine, a flexible connector, a central shaft, a first hollow shaft, a second hollow shaft, a first gear ring, a first planet row, a second planet row, a third planet row, a first motor and a second motor;

the central shaft, the first hollow shaft, the second hollow shaft, the first planet row, the second planet row, the third planet row, the first motor and the second motor are all arranged in the shell;

the first hollow shaft is sleeved on the central shaft, and the second hollow shaft is sleeved on the first hollow shaft;

the output end of the engine is in transmission connection with the central shaft through a flexible connector;

the central shaft is in transmission connection with the first hollow shaft through a first planet row, wherein the first planet row comprises a first sun gear, a first planet gear and a first planet carrier, the central shaft is coaxially and fixedly connected with the first planet carrier, the first sun gear is fixedly arranged on the first hollow shaft, the first planet gear is arranged on the first planet carrier, and the first planet gear is respectively meshed with the first sun gear and the first gear ring;

the second planet row comprises a second sun gear, a second planet gear and a second planet carrier, the second sun gear is fixedly arranged on the second hollow shaft, the second planet carrier is fixedly connected with the shell, the second planet gear is arranged on the second planet carrier, and the second planet gear is respectively meshed with the second sun gear and the first gear ring;

the third planet row comprises a third sun gear, a third planet wheel, a third planet carrier and a second gear ring, the first gear ring is in transmission connection with the third sun gear through a first output shaft, the third planet carrier is in transmission connection with wheels through a second output shaft, and the second gear ring is in transmission connection with one of the third planet carrier or the shell through a first gear sleeve;

a third gear sleeve is arranged between the central shaft and the first hollow shaft;

the first hollow shaft is also in transmission connection with an output shaft of the first motor through a first reduction gear;

the second hollow shaft is also in transmission connection with an output shaft of a second motor through a reduction gear of an intermediate shaft;

preferably, the system further comprises a limp input shaft, a limp output shaft, a power takeoff output shaft, a central shaft first gear;

the limp input shaft, the limp output shaft and the power takeoff output shaft are all arranged in the shell, and the first gear of the central shaft is arranged on the central shaft;

the limp input shaft is arranged in parallel with the central shaft and is in transmission connection with the central shaft through a first gear of the central shaft;

the limping output shaft and the limping input shaft are coaxially arranged, and a fourth gear sleeve is arranged between the limping input shaft and the limping output shaft;

the lameness output shaft is in transmission connection with the second hollow shaft through a reduction gear of an intermediate shaft;

the power takeoff output shaft is coaxially connected with the limp output shaft, and a second gear sleeve is arranged between the power takeoff output shaft and the limp output shaft (9).

Preferably, the power takeoff output shaft is in splined connection with the limp output shaft. Therefore, the output shaft of the power takeoff and the limp output shaft can synchronously move, and the transmission force is stable and reliable.

The utility model has the advantages that:

1. the third gear sleeve is connected with the central shaft, so that the dual motors can drive the vehicle together in a pure electric driving mode, the torque and the power of the second motor are reduced, the size of the whole motor is reduced, and the system cost is reduced;

2. the double motors are arranged in a parallel shaft mode, so that the axial length size of the power assembly can be greatly reduced, the arrangement space of the power assembly is reduced, and the arrangement mode is more flexible;

3. in the three-planet-row series-parallel scheme and each driving mode of planet row output, the mode with the highest transmission efficiency is that the engine directly drives the vehicle, and in order to improve the transmission efficiency of the system, the multipurpose engine directly drives the vehicle, so that the third gear sleeve is connected with the first hollow shaft, the direct drive of the engine can be realized, and the fuel saving rate of the whole vehicle system is improved;

4. the motor arrangement mode can be suitable for different vehicle types, and can be suitable for the fields of urban buses, highway buses, coaches, new energy trucks, new energy automobiles and the like;

5. the double planetary rows share the gear ring, so that the power of the engine can be decoupled, one part of the power is transmitted to the third planetary row, and the other part of the power is transmitted to the first motor for power generation. And the use requirements of different working conditions are met by switching different modes.

Drawings

Fig. 1 is a diagram of a two-gear dual-motor three-planet-row hybrid power system according to an embodiment of the present invention;

fig. 2 is a structural diagram of a two-gear dual-motor three-planet-row hybrid power system including a limp module according to an embodiment of the present invention;

in the figure, 1-engine; 11-a flexible connector; 10-a housing; 21-a first motor; 211-a first motor gear; 212-a first reduction gear; 22-a second electric machine; 221-a second motor gear; 222-countershaft reduction gear; 3-central axis; 31-central shaft first gear; 32-central shaft second gear; 33-a first planet carrier; 34-a first planet; 4-a first hollow shaft; 41-a first hollow shaft first gear; 42-first hollow shaft second gear; 43-a first sun gear; 5-a second hollow shaft; 51-a second hollow shaft gear; 52-a second sun gear; 53-second planet; 54-a second planet carrier; 6-a first gear ring; 61-a first output shaft; 62-a third sun gear; 63-a third planet; 64-a third planet carrier; 65-a second ring gear; 66-a second output shaft; 71-a first gear sleeve; 72-a second gear sleeve; 73-a third gear sleeve; 74-fourth gear sleeve; 8-limp input shaft; 81-limp input shaft first gear; 82-limp input shaft second gear; 9-limp output shaft; 91-limp output shaft front end gear; 92-limp output shaft rear end gear; 93-limp output shaft hollow gear; 94-output shaft of power takeoff.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

Example 1

Referring to fig. 1 and 2, the present invention provides a two-gear dual-motor three-planetary-row hybrid power system, which includes an engine 1, a flexible connector 11, a central shaft 3, a first hollow shaft 4, a second hollow shaft 5, a first gear ring 6, a first planetary row, a second planetary row, a third planetary row, a first motor 21, and a second motor 22;

the central shaft 3, the first hollow shaft 4, the second hollow shaft 5, the first planet row, the second planet row, the third planet row, the first motor 21 and the second motor 22 are all arranged in the shell 10;

the first hollow shaft 4 is sleeved on the central shaft 3, and the second hollow shaft 5 is sleeved on the first hollow shaft 4;

the output end of the engine 1 is in transmission connection with the central shaft 3 through a flexible connector 11;

the central shaft 3 is in transmission connection with the first hollow shaft 4 through a first planet row, wherein the first planet row comprises a first sun gear 43, a first planet gear 34 and a first planet carrier 33, the central shaft 3 is coaxially and fixedly connected with the first planet carrier 33, the first sun gear 43 is fixedly arranged on the first hollow shaft 4, the first planet gear 34 is arranged on the first planet carrier 33, and the first planet gear 34 is respectively meshed with the first sun gear 43 and the first gear ring 6;

the second planet row comprises a second sun gear 52, a second planet gear 53 and a second planet carrier 54, the second sun gear 52 is fixedly arranged on the second hollow shaft 5, the second planet carrier 54 is fixedly connected with the casing 10, the second planet gear 53 is arranged on the second planet carrier 54, and the second planet gear 53 is respectively meshed with the second sun gear 52 and the first ring gear 6;

the third planet row comprises a third sun gear 62, a third planet gear 63, a third planet carrier 64 and a second gear ring 65, the first gear ring 6 and the third sun gear 62 are in transmission connection through a first output shaft 61, the third planet carrier 64 is in transmission connection with wheels through a second output shaft 66, namely, one end of the second output shaft 66 is fixedly connected with the third planet carrier 64, the other end of the second output shaft 66 is connected with a speed reducer, and the wheels of the speed reducer are in transmission connection; the second gear ring 65 is in transmission connection with one of the third planet carrier 64 or the housing 10 through a first gear sleeve 71; here two gear shifts can be realized: in the first gear, the internal spline of the first gear sleeve 71 is connected with the second ring gear 65 and the third planet carrier 64 at the same time, and the external spline is in a free state, so that the second ring gear 65 and the third planet carrier 64 cannot move relatively, the third planet gear 63 cannot rotate, and power is input from the first output shaft 61 at the moment, and directly drives the whole third planet row to rotate, so that the power is output. In the second gear, the internal spline of the first gear sleeve 71 is connected with the second ring gear 65, the external spline of the first gear sleeve 71 is connected with the housing 10, so that the second ring gear 65 cannot rotate, the third planet carrier 64 is not limited in movement, power is input from the first output shaft 61, is transmitted to the third planet carrier 64 through the third sun gear 62 and the third planet gear 63, and is further transmitted to the second output shaft 66, and power output is realized.

A third gear sleeve 73 is arranged between the central shaft 3 and the first hollow shaft 4; the third gear sleeve 73 as a bidirectional brake, the outer ring of which is connected with the inner spline on the housing 10 through the outer spline, when the third gear sleeve 73 slides to be in transmission connection with the first hollow shaft first gear 41 on the first hollow shaft 4, the housing 10 and the first hollow shaft 4 can realize the brake of the first hollow shaft 4 through the transmission of the third gear sleeve 73; when the third gear sleeve 73 is slid to be connected with the second gear 32 of the central shaft 3, the housing 10 and the central shaft 3 are driven by the third gear sleeve 73, so that the central shaft 3 can be braked.

The first hollow shaft 4 is also in transmission connection with the output shaft of the first motor 21 through a first reduction gear 212: that is, the first hollow shaft second gear 42 on the first hollow shaft 4 is in meshing transmission with the first reduction gear 212, and the first reduction gear 212 is in meshing transmission with the first motor gear 211 on the output shaft of the first motor 21, so that the transmission connection of the first hollow shaft 4 and the output shaft of the first motor 21 is realized.

The second hollow shaft 5 is also in transmission connection with the output shaft of the second motor 22 through a reduction gear 222 of the intermediate shaft: that is, the second hollow shaft gear 51 on the second hollow shaft 5 is in meshing transmission with the intermediate shaft reduction gear 222, and the intermediate shaft reduction gear 222 is in meshing transmission with the second motor gear 221 at the output shaft end of the second motor 22, so that the transmission connection between the second hollow shaft 5 and the output shaft of the second motor 22 is realized.

The utility model discloses the system operation adopts mode as follows:

(1) electric only mode

When the ring gear of the third gear sleeve 73 is engaged with the second gear 32 of the central shaft, the external spline of the third gear sleeve 73 is engaged with the internal spline on the shell 10, at this time, the third gear sleeve 73 locks the central shaft 3 to make it unable to move, the engine 1 temporarily does not provide power, at this time, the system power mainly comes from the first motor 21 and the second motor 22, and the dual motors jointly drive the vehicle in a pure electric mode. Compared with the pure electric drive of other planet row schemes, the mode can only work by a single motor, and the scheme can reduce the torque and the power of the first motor and reduce the system cost.

(2) Engine only mode

At this time, the inner gear ring of the third gear sleeve 73 is engaged with the first hollow shaft gear 41, the external spline of the third gear sleeve 73 is engaged with the internal spline on the shell 10, so that the third gear sleeve 73 locks the first hollow shaft 4 to prevent the first hollow shaft 4 from moving, the system is directly driven by the engine 1, the first hollow shaft 4 does not participate in driving, the use probability that the engine directly drives the whole vehicle to run can be improved, the transmission efficiency of the power assembly system is higher, the fuel consumption of the system is reduced, the fuel saving rate of the whole vehicle system is improved, and the system can be simultaneously used for urban buses and long-distance buses.

(3) Hybrid drive mode

In the mode, the inner gear rings of the third gear sleeve 73 are not meshed with the first hollow shaft first gear 41 and the central shaft second gear 32, and the central shaft 3 and the first hollow shaft 4 are not locked; at this time, the system is driven by the engine 1 and the second motor 22 in a hybrid manner, and the first motor 21 generates electric power.

(4) Regenerative braking

When braking is performed, braking energy may be recovered by the second motor 22, or both the first motor 21 and the second motor 22. The second motor 22 is connected with the second sun gear 52 through the intermediate reduction gear 222 and the second hollow shaft 5, and the motor torque is transmitted to the third planetary gear train through the second planetary gear train, so that the regenerative braking is realized.

Therefore, the system can realize that the double motors drive the vehicle together in a pure electric driving mode, reduce the torque and the power of the second motor, reduce the size of the whole motor and reduce the system cost; the direct drive of the engine can be realized, and the fuel saving rate of the whole vehicle system is improved; through the mode switch of difference, satisfy the user demand of different operating modes, motor arrangement mode can be applicable to different motorcycle types simultaneously, including being applicable to fields such as city bus, highway passenger train, coach, new energy truck, new energy automobile.

Example 2

As shown in fig. 2, the other parts of the present embodiment are the same as those of embodiment 1, wherein the different parts are that the system further comprises a limp home input shaft 8, a limp home output shaft 9, a power takeoff output shaft 94, a central shaft first gear 31;

the limp input shaft 8, the limp output shaft 9 and the power takeoff output shaft 94 are all arranged in the shell 10, and the central shaft first gear 31 is arranged on the central shaft 3;

the limp input shaft 8 is arranged in parallel with the central shaft 3, and the limp input shaft 8 is in transmission connection with the central shaft 3 through a central shaft first gear 31; namely, the limp input shaft 8 is in transmission connection with the central shaft 3 by the meshing of the limp input shaft first gear 81 on the limp input shaft 8 and the central shaft first gear 31.

The limp output shaft 9 and the limp input shaft 8 are coaxially arranged, and a fourth gear sleeve 74 is arranged between the limp input shaft 8 and the limp output shaft 9; the limp input shaft second gear 82 and the limp output shaft front end gear 91 can be connected by sliding the fourth gear sleeve 74, so that the limp output shaft 9 and the limp input shaft 8 are in transmission connection.

The limp output shaft 9 is in transmission connection with the second hollow shaft 5 through a reduction gear 222 of the intermediate shaft; the limp output shaft hollow gear 93 on the limp output shaft 9 is meshed with the intermediate shaft reduction gear 222 for transmission, and the intermediate shaft reduction gear 222 is meshed with the second hollow shaft gear, so that the limp output shaft 9 is in transmission connection with the second hollow shaft 5.

The power takeoff output shaft 94 is coaxially connected with the limp home output shaft 9, and a second gear sleeve 72 is arranged between the power takeoff output shaft 94 and the limp home output shaft 9. When the second gear sleeve 72 is moved to engage the internal splines thereof with the limp output shaft rear end gear 92, a limp mode forward gear is established; when the two are disengaged, the neutral mode is a limp home mode.

The system operation in this embodiment may also adopt the following operating modes:

(1) limp forward mode

In this mode, the central shaft first gear 31 meshes with the limp input shaft first gear 81, the limp input shaft 8 and the limp output shaft 9 are connected by the fourth gear sleeve 74, and the limp output shaft hollow gear 93 meshes with the counter shaft reduction gear 222. In this way, the power of the engine 1 is transmitted from the central shaft 3, through the engagement of the central shaft first gear 31 with the limp input shaft first gear 81, through the limp input shaft 8 and the limp output shaft 9, and then through the engagement of the limp output shaft hollow gear 93 with the counter shaft reduction gear 222 to the second hollow shaft 5, thereby realizing the limp forward mode.

(2) Mechanical power take-off mode

In this mode, the central shaft first gear 31 meshes with the limp input shaft first gear 81, the limp input shaft 8 and the limp output shaft 9 are connected by the fourth gear sleeve 74, and the limp output shaft 9 is connected with the power take-off output shaft 94. The power output at this time is: the power of the engine 1 is transmitted to the central shaft 3, then the central shaft first gear 31 is meshed with the limp input shaft first gear 81, the power of the central shaft 3 is transmitted to the limp input shaft 8, the power limp input shaft 8 is transmitted to the limp output shaft 9 through the fourth gear sleeve 74, then the power is transmitted to the power takeoff output shaft 94 by the limp output shaft 9, and finally the power is output from the power takeoff output shaft 94, so that the mechanical power takeoff mode is realized.

(3) Electric power takeoff mode

In this mode, the limp output shaft hollow gear 93 meshes with the counter shaft reduction gear 222, and the limp output shaft 9 is connected with the power take-off output shaft 94. The power transmission path is as follows: the power of the second motor 22 is transmitted to the intermediate shaft reduction gear 222 through the second motor gear 221, the intermediate shaft reduction gear 222 is meshed with the limp output shaft hollow gear 93, and therefore the power is transmitted to the limp output shaft 9 and then transmitted to the power takeoff output shaft 94 to be output, and therefore the electric power takeoff mode is achieved.

Example 3

The rest of the present embodiment is the same as embodiment 2, except that the power take-off output shaft 94 is splined to the limp home output shaft 8. Such a connection allows the transmission between the shafts to be synchronized and stable.

In other embodiments, the first gear sleeve, the second gear sleeve, the third gear sleeve and the fourth gear sleeve can be switched in a sliding manner in an electric control manner.

In addition, the utility model discloses have the bi-motor and adopt the parallel axis to arrange, and arrange the sun gear through reduction gears and different planet respectively and be connected, can reduce power assembly's axial length by a wide margin, reduce power assembly's the space of arranging, improve the application scope of power assembly to different motorcycle types. By designing the connection mode of the three planetary rows and the engine, the use probability of the engine for directly driving the whole vehicle to run is improved, the transmission efficiency of a power assembly system is higher, and the fuel consumption of the system is reduced. The double planetary rows share the gear ring, so that the power of the engine can be decoupled, one part of the power is transmitted to the third planetary row, and the other part of the power is transmitted to the first motor for power generation. And the use requirements of different working conditions are met by switching different modes.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (3)

1. A two-gear double-motor three-planet-row hybrid power system is characterized by comprising an engine (1), a flexible connector (11), a central shaft (3), a first hollow shaft (4), a second hollow shaft (5), a first gear ring (6), a first planet row, a second planet row, a third planet row, a first motor (21) and a second motor (22);

the central shaft (3), the first hollow shaft (4), the second hollow shaft (5), the first planet row, the second planet row, the third planet row, the first motor (21) and the second motor (22) are all arranged in the shell (10);

the first hollow shaft (4) is sleeved on the central shaft (3), and the second hollow shaft (5) is sleeved on the first hollow shaft (4);

the output end of the engine (1) is in transmission connection with the central shaft (3) through a flexible connector (11);

the central shaft (3) is in transmission connection with the first hollow shaft (4) through a first planet row, wherein the first planet row comprises a first sun gear (43), a first planet gear (34) and a first planet carrier (33), the central shaft (3) is coaxially and fixedly connected with the first planet carrier (33), the first sun gear (43) is fixedly arranged on the first hollow shaft (4), the first planet gear (34) is arranged on the first planet carrier (33), and the first planet gear (34) is respectively meshed with the first sun gear (43) and the first gear ring (6);

the second planet row comprises a second sun gear (52), a second planet gear (53) and a second planet carrier (54), the second sun gear (52) is fixedly arranged on the second hollow shaft (5), the second planet carrier (54) is fixedly connected with the shell (10), the second planet gear (53) is arranged on the second planet carrier (54), and the second planet gear (53) is respectively meshed with the second sun gear (52) and the first gear ring (6);

the third planet row comprises a third sun gear (62), a third planet gear (63), a third planet carrier (64) and a second gear ring (65), the first gear ring (6) is in transmission connection with the third sun gear (62) through a first output shaft (61), the third planet carrier (64) is in transmission connection with a wheel through a second output shaft (66), and the second gear ring (65) is in transmission connection with one of the third planet carrier (64) or the shell (10) through a first gear sleeve (71);

a third gear sleeve (73) is arranged between the central shaft (3) and the first hollow shaft (4);

the first hollow shaft (4) is also in transmission connection with an output shaft of the first motor (21) through a first reduction gear (212);

the second hollow shaft (5) is also in transmission connection with an output shaft of a second motor (22) through a reduction gear (222) of a middle shaft.

2. The system of claim 1, further comprising a limp input shaft (8), a limp output shaft (9), a power take-off output shaft (94), a central shaft first gear (31);

the limp input shaft (8), the limp output shaft (9) and the power takeoff output shaft (94) are all arranged in the shell (10), and the central shaft first gear (31) is arranged on the central shaft (3);

the limp input shaft (8) is arranged in parallel with the central shaft (3), and the limp input shaft (8) is in transmission connection with the central shaft (3) through a central shaft first gear (31);

the limp output shaft (9) and the limp input shaft (8) are coaxially arranged, and a fourth gear sleeve (74) is arranged between the limp input shaft (8) and the limp output shaft (9);

the limp output shaft (9) is in transmission connection with the second hollow shaft (5) through a reduction gear (222) of a middle shaft;

the power takeoff output shaft (94) is coaxially connected with the limp output shaft (9), and a second gear sleeve (72) is arranged between the power takeoff output shaft (94) and the limp output shaft (9).

3. The system of claim 2, wherein the power take-off output shaft (94) is splined to a limp home output shaft (9).

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