CN114604075A - Heavy truck hybrid system with combined power take-off and limping home functions - Google Patents

Abstract

The invention discloses a heavy-duty truck hybrid system with compound power take-off and limp home functions, belonging to the technical field of heavy-duty truck transmission systems. The engine is connected to a rear planet carrier through a central shaft; ; The front sun gear is connected with an outer hollow shaft connected with the drive motor; the transfer shaft is connected with the central shaft, and the transfer shaft gear hub is set, and the rear gear of the transfer shaft and the rear gear hub of the transfer shaft are rotated and installed; The connector is connected to the gear hub of the power take-off shaft; a sliding sleeve locking device and a composite sliding sleeve are installed on the casing. The alternator and engine adjust the speed of the rear sun gear and the rear planetary carrier to realize stepless speed change, decoupling of engine speed and vehicle speed, and adjust the sliding sleeve locking device to realize various mode switching; the torque compensation of alternator and engine realizes the output during shifting The power is not interrupted; the composite sliding sleeve realizes limp home, drive motor power take-off and engine power take-off, covering all working conditions of engine power in the event of electrical failure, meeting the needs of heavy trucks under complex working conditions.

Description

A heavy truck hybrid system with compound power take-off and limp home functions

technical field

The invention belongs to the technical field of heavy-duty truck transmission systems, in particular to a heavy-duty truck hybrid system with functions of composite power take-off and limp home.

Background technique

New energy vehicles refer to the use of unconventional vehicle fuels as the power source (or the use of conventional vehicle fuels, the use of new vehicle power units), the integration of advanced technologies in vehicle power control and driving, and the formation of advanced technical principles. New technology, new structure of the car.

New energy vehicles include four major types of hybrid electric vehicles (HEV), pure electric vehicles (BEV, including solar vehicles), fuel cell electric vehicles (FCEV), and other new energy vehicles (such as super capacitors, flywheels and other high-efficiency energy storage) vehicles Wait. Unconventional vehicle fuels refer to fuels other than gasoline and diesel.

In the field of heavy-duty trucks, the hybrid system has a large space for development. At present, the heavy-duty truck hybrid system usually adopts the P2 parallel configuration. The gearbox used in this configuration is basically the same as that of the traditional energy gearbox, but there are interruptions in shifting power, difficulty in axial arrangement, and inability to decouple engine speed and vehicle speed, etc. question. The power-split hybrid configuration used in the passenger car field can realize stepless speed regulation and no power interruption during driving, but its simple structure and small transmission torque cannot be well adapted to the field of heavy-duty trucks with more complex working conditions.

On the other hand, heavy engineering vehicles need to be equipped with a power take-off due to their functional use. Due to the different working modes of the hybrid system under different working conditions, the engine and the motor cannot work at the same time, and it is impossible to ensure that both the engine and the motor have the feasibility of taking power. . Moreover, when an electrical failure occurs in the current dual-motor power-split hybrid architecture, since the vehicle does not have a limp home module for multi-speed driving, the vehicle cannot be driven normally by the engine, and cannot meet the needs of heavy-duty vehicles in complex working conditions.

At present, there is no complete hybrid system for heavy-duty vehicles, which can meet the requirements that both the motor and the engine can take power in different working modes, and the engine can still drive the vehicle normally when the electrical appliance fails.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a heavy-duty truck hybrid system with composite power take-off and limp home functions. Both the motor and the engine can take power in different working modes, and the engine can still drive the vehicle normally when the electrical appliance fails. The use requirements of vehicles in complex working conditions.

The present invention is achieved through the following technical solutions:

A heavy truck hybrid system with composite power take-off and limp home functions, comprising a casing, a generator, a drive motor, an engine, an axle, a dual-planetary row power coupling mechanism, a transfer shaft and a power take-off;

The double planetary row power coupling mechanism includes a front planetary row power coupling mechanism and a rear planetary row power coupling mechanism, the outer rings of the two planetary gears are meshed with a ring gear, and the ring gear is connected with the axle drive;

The engine is connected with the rear planet carrier of the power coupling mechanism of the rear planetary row through the central shaft; the rear sun gear of the power coupling mechanism of the rear planetary row is connected with an inner hollow shaft, and the generator is connected with the inner hollow shaft for transmission; The sun gear is connected with the outer hollow shaft, and the drive motor is connected with the outer hollow shaft through the drive motor gearbox system;

The transfer shaft is connected with the central shaft in a transmission, on which a transfer shaft gear hub is installed, and a rear gear of the transfer shaft that meshes with the gears in the transmission system of the drive motor is rotatably installed on the transfer shaft, and the rear gear of the transfer shaft is connected with a The rear gear hub of the transfer shaft;

The power take-off is connected with the power take-off shaft gear hub through the power take-off shaft;

The casing is equipped with a sliding sleeve locking device that can lock the central shaft and the inner hollow shaft respectively, and a composite device that can connect the rear gear hub of the transfer shaft, the gear hub of the transfer shaft and the gear hub of the power take-off shaft two by two. slip sleeve.

A further improvement of the present invention is that the central shaft, the inner hollow shaft and the outer hollow shaft are arranged coaxially from the inside to the outside.

A further improvement of the present invention is that the drive motor gearbox system includes a fifth transmission gear connected and installed with the output shaft of the drive motor, a sixth transmission gear, a seventh transmission gear and an eighth transmission gear connected and installed through the connection shaft; the fifth transmission gear The transmission gear meshes with the sixth transmission gear; the outer hollow shaft is rotatably mounted with a second transmission gear and a first transmission gear that mesh with the seventh transmission gear and the eighth transmission gear respectively; The gear and the first transmission gear are respectively connected with the main box synchronizer; the front planet carrier of the front planetary row power coupling mechanism is installed with the auxiliary box synchronizer which can be connected with the front sun gear and the casing respectively.

A further improvement of the present invention is that a tenth transmission gear is installed on the central shaft, an eleventh transmission gear that meshes with the tenth transmission gear is installed on the transfer shaft, and the rear gear of the transfer shaft meshes with the seventh transmission gear.

A further improvement of the present invention is that the sliding sleeve locking device includes a central shaft gear hub connected and installed with the central shaft, an inner hollow shaft gear hub connected and installed with the inner hollow shaft, and a sliding sleeve installed on the housing; the sliding sleeve has The three gears are respectively connected with the gear hub of the central shaft, connected with the gear hub of the inner hollow shaft and neutral.

A further improvement of the present invention is that the main case synchronizer has three gears, which are respectively connected to the second transmission gear, connected to the first transmission gear and neutral; the auxiliary case synchronizer has two gears, which are respectively connected to the front sun gear. and connected to the housing.

A further improvement of the present invention is that a torsion transfer plate for connecting with the auxiliary box synchronizer is installed on the casing.

A further improvement of the present invention is that the engine is drive-connected to the central shaft through a clutch.

A further improvement of the present invention is that the generator is drive-connected to the inner hollow shaft through a generator deceleration system; the generator deceleration system includes a third transmission gear, a fourth transmission gear and a ninth transmission gear that are meshed in sequence; the third transmission gear is connected to the The output shaft of the generator is connected and installed, and the ninth transmission gear is connected and installed with the inner hollow shaft.

A further improvement of the present invention is that the central shaft, the inner hollow shaft and the outer hollow shaft are respectively rotatably mounted through the bearing and the housing.

As can be seen from the above technical solutions, the beneficial effects of the present invention are:

The power of the drive motor is transmitted to the front sun gear through the drive motor gearbox system; the power of the engine is transmitted to the rear planet carrier through the central shaft; the generator is connected to the rear sun gear through the inner hollow shaft, which can realize the speed adjustment of the rear sun gear And reverse charging, the three powers are coupled in different situations through the double planetary power coupling mechanism. The overall structure is simple, the design is compact, and the practicability is good.

The speed of the rear sun gear and the rear planet carrier is adjusted by the alternator and the engine respectively to realize the stepless speed change, the decoupling of the engine speed and the vehicle speed. . Through the adjustment of the main box synchronizer and the auxiliary box synchronizer, the range of the transmission speed ratio can be widened to enhance the power performance of the whole vehicle. By adjusting the sliding sleeve position of the sliding sleeve locking device, the pure electric mode, hybrid mode and engine direct drive mode can be flexibly switched under complex working conditions. Through the generator and engine torque compensation, the output power is not interrupted during the shifting process in each working mode.

Through the left, middle and right adjustment of the composite sliding sleeve, three working modes of limp home, drive motor power take-off and engine power take-off can be realized respectively. Realize that the power of the engine can cover all working conditions when the electric motor fails to work, and the vehicle does not need a trailer, which improves the operation efficiency. It can also realize that the engine or the motor can take power to meet the power take-off requirements of the vehicle under different working conditions, and ensure that it can meet the complex needs of heavy-duty vehicles. operating conditions.

This heavy-duty truck hybrid system with composite power take-off and limp home functions can be widely used in the field of new energy commercial vehicles, especially for heavy-duty trucks with complex working conditions and many up and down slopes. It also improves the comfort, safety and economy of the whole vehicle, has broad prospects for promotion and application, and has good practicability.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

FIG. 1 is a schematic structural diagram of a specific embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a sliding sleeve locking device according to a specific embodiment of the present invention.

FIG. 3 is a schematic structural diagram of the composite sliding sleeve in different positions according to the specific embodiment of the present invention.

In the accompanying drawings: 1. Central shaft, 2. Housing, 3. Front planetary carrier, 4. Front sun gear, 5. Ring gear, 6. Double planetary row power coupling mechanism, 7. Rear planetary carrier, 8. Output shaft , 9, the rear sun gear, 10, the inner hollow shaft, 11, the torque transmission plate, 12, the auxiliary box synchronizer, 13, the first transmission gear, 14, the main box synchronizer, 15, the second transmission gear, 16, the first transmission gear Three transmission gears, 17, outer hollow shaft, 18, sliding sleeve locking device, 19, fourth transmission gear, 20, axle, 21, fifth transmission gear, 22, sixth transmission gear, 23, seventh transmission gear , 24, eighth transmission gear, 25, connecting shaft, 26, generator, 27, drive motor, 28, engine, 29, clutch, 30, inner hollow shaft gear hub, 31, sliding sleeve, 32, shift fork, 33 , the central shaft gear hub, 34, the ninth transmission gear, 35, the tenth transmission gear, 36, the eleventh transmission gear, 37, the transfer shaft, 38, the power take-off, 39, the rear gear of the transfer shaft, 40, Composite sliding sleeve, 41, gear hub of transfer shaft, 42, power take-off shaft, 43, gear hub of power take-off shaft, 44, gear hub of rear gear of transfer shaft.

Detailed ways

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments. Obviously, the implementation described below Examples are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

As shown in Figures 1-3, the present invention discloses a heavy truck hybrid system with compound power take-off and limp home functions, comprising a casing 2, a generator 26, a drive motor 27, an engine 28, an axle 20, a double planetary The exhaust force coupling mechanism 6, the transfer shaft 37 and the power take-off 38;

The double planetary row power coupling mechanism 6 includes a front planetary row power coupling mechanism and a rear planetary row power coupling mechanism; the front planetary row power coupling mechanism includes a front sun gear 4 , a front planetary carrier 3 and several planets mounted on the front planetary carrier 3 Gear, the rear planetary row power coupling mechanism includes a rear sun gear 9, a rear planetary carrier 7 and several planetary gears mounted on the rear planetary carrier 7; and the front planetary row power coupling mechanism and the rear planetary row power coupling mechanism A plurality of planets The outer ring of the gear is jointly meshed with a ring gear 5, the ring gear 5 is rotatably connected and installed with the housing 2 through the bearing, and the ring gear 5 and the axle 20 are connected by a transmission through the output shaft 8 to drive the wheels and realize traveling;

The engine 28 is connected with the rear planet carrier 7 through the central shaft 1; the rear sun gear 9 is connected with the inner hollow shaft 10, the generator 26 is connected with the inner hollow shaft 10 in a driving manner; the front sun gear 4 is connected with the outer hollow shaft 17, and the drive motor 27 passes through The drive motor gearbox system is drive-connected with the outer hollow shaft 17;

The transfer shaft 37 is rotatably installed on the housing 2 through the bearing, and the transfer shaft 37 is connected with the central shaft 1 in a transmission connection. A rear gear 39 of the transfer shaft meshed with a gear in the box system, the rear gear 39 of the transfer shaft is connected with a gear hub 44 of the rear gear of the transfer shaft through a sleeve, and the sleeve is rotatably sleeved on the transfer shaft 37 through a needle bearing. superior;

The power take-off 38 is connected with the power take-off shaft gear hub 43 through the power take-off shaft 42;

A sliding sleeve locking device 18 capable of locking the central shaft 1 and the inner hollow shaft 10 respectively, and a gear hub 44 for the rear gear of the transfer shaft, the gear hub 41 for the transfer shaft and the gear hub for the power take-off shaft are installed on the casing 2 43 Composite sliding sleeves 40 which are connected in pairs; inner splines are arranged on the inner side of the composite sliding sleeve 40, and two grooves divide the inner splines into three sections. By adjusting the axial position of the composite sliding sleeves 40, the adapter can be selectively connected Two of the gear hub 44 at the rear of the shaft, the gear hub 41 of the transfer shaft and the gear hub 43 of the power take-off shaft can realize flexible switching between the modes of limp home, drive motor power take-off and engine power take-off mode.

The central shaft 1 , the inner hollow shaft 10 and the outer hollow shaft 17 are arranged coaxially from the inside to the outside, and the space arrangement is more compact, ensuring a high degree of integration.

As shown in FIG. 1 , the drive motor gearbox system includes a fifth transmission gear 21 connected to the output shaft of the drive motor 27 , a sixth transmission gear 22 , a seventh transmission gear 23 and an eighth transmission gear connected and installed through the connection shaft 25 . 24; the fifth transmission gear 21 meshes with the sixth transmission gear 22; the outer hollow shaft 17 is rotatably mounted with the second transmission gear 15 and the first transmission gear 13 meshing with the seventh transmission gear 23 and the eighth transmission gear 24 respectively; The outer hollow shaft 17 is provided with a main box synchronizer 14 which can be connected with the second transmission gear 15 and the first transmission gear 13 respectively; The sub-tank synchronizers 12 to which the casings 2 are respectively connected. The front planet carrier 3 is connected with the auxiliary box synchronizer 12 through a sleeve, and the sleeve is rotatably sleeved on the outer side of the outer hollow shaft 17 . Through the arrangement of the main box synchronizer 14 and the auxiliary box synchronizer 12, the arrangement of multiple gears can be realized, and the range of the transmission speed ratio can be widened to enhance the power performance of the whole vehicle.

The second transmission gear 15, the first transmission gear 13 and the power coupling mechanism of the front planetary row are arranged in sequence from left to right, the main case synchronizer 14 is arranged between the second transmission gear 15 and the first transmission gear 13, the auxiliary case synchronizer 12 is arranged between the first transmission gear 13 and the power coupling mechanism of the front planetary row. Ensure the compactness and rationality of the space layout.

Wherein, the transmission ratio of the seventh transmission gear 23 and the second transmission gear 15 is different from the transmission ratio of the eighth transmission gear 24 and the first transmission gear 13, which can ensure a wider range of rotational speed output. The former transmission ratio is smaller than that of the latter, which can be 1:4 and 1:8 respectively.

As shown in FIG. 1 , a tenth transmission gear 35 is installed on the central shaft 1, and an eleventh transmission gear 36 meshing with the tenth transmission gear 35 is installed on the transfer shaft 37; the rear gear 39 of the transfer shaft is connected to the seventh transmission Gear 23 meshes. Stable and reliable power transmission from the central shaft 1 to the transfer shaft 37 is achieved through the meshing of the tenth transmission gear 35 and the eleventh transmission gear 36; Take power.

As shown in FIG. 1-2 , the sliding sleeve locking device 18 includes a central shaft gear hub 33 connected and installed with the central shaft 1 , an inner hollow shaft gear hub 30 connected and installed with the inner hollow shaft 10 , and a gear hub 30 installed on the housing 2 . Sliding sleeve 31; The sliding sleeve 31 has three gears, which are connected to the central shaft gear hub 33, connected to the inner hollow shaft gear hub 30 and neutral. A shift fork 32 for adjusting the sliding sleeve 31 to the left and right is also installed on the housing 2 . The inner and outer rings of the sliding sleeve 31 are respectively provided with inner and outer splines, the outer ring of the sliding sleeve 31 is provided with radial grooves, and the shifting forks 32 are inserted into the grooves. An inner spline is arranged on the inner ring of the housing 2, and two axial grooves are symmetrically distributed on both sides of the housing 2, allowing the fork 32 to drive the sliding sleeve 31 to axially translate the splines in the housing. The inner hollow shaft tooth hub 30 is connected with the inner hollow shaft 10 by splines. When the sliding sleeve inner spline and the inner hollow shaft tooth hub are spline connected, the inner hollow shaft 10 cannot rotate. The central shaft tooth hub 33 is connected with the central shaft 1 through splines, and when the inner splines of the sliding sleeve and the outer splines of the central shaft tooth hub are connected, the central shaft 1 cannot rotate. By setting the sliding sleeve 31 of the sliding sleeve locking device 18 in the left, middle and right gears, flexible switching between the pure electric mode, the engine direct drive mode and the hybrid mode can be realized.

By adjusting the main tank synchronizer 14 and the auxiliary tank synchronizer 12, the following four gear adjustments can be realized:

When the auxiliary box synchronizer 12 moves to the right, the front planetary carrier 3 is connected to the housing 2 through the synchronizer spline. At this time, the front planetary carrier 3 is fixed and the auxiliary box is in the low gear area; when the auxiliary box synchronizer 12 moves to the left, The front planet carrier 3 and the front sun gear 4 are connected by a synchronizer spline, the front sun gear 4 and the ring gear 5 rotate at the same speed, and the auxiliary box is in the high gear area at this time.

The main box synchronizer 14 moves left and right to realize the connection with the second transmission gear 15 and the first transmission gear 13 respectively.

By combining the high gear area and low gear area of the main tank with the high gear area and low gear area of the auxiliary tank respectively (adjusting the left and right gear positions of the main tank synchronizer 14 and the auxiliary tank synchronizer 12), four gears can be flexibly realized Bit setting: high gear, medium high gear, medium low gear and low gear.

By adjusting the position of the sliding sleeve 31 of the sliding sleeve locking device 18 (connected with the central shaft gear hub 33, connected with the inner hollow shaft gear hub 30 and neutral), the pure electric mode, the engine direct drive mode and the hybrid mode can be realized. Flexible switching. details as follows:

Pure electric mode: the sliding sleeve 31 is moved to the left by the operation of the shift fork 32, the inner spline of the sliding sleeve 31 is connected with the outer spline of the central shaft tooth hub 33, the central shaft 1 is fixed, and the power of the driving motor 27 is transmitted through the outer hollow shaft 17. To the front sun gear 4; and according to the actual power demand of the whole vehicle, the generator 26 can selectively participate in the drive, the power of the generator 26 is transmitted to the rear sun gear 9 through the inner hollow shaft 10, and the power coupling is carried out at the ring gear 5 to transmit to the output axis 8.

Engine direct drive mode: the sliding sleeve 31 is moved to the right by the operation of the shift fork 32, the inner spline of the sliding sleeve 31 is connected with the outer spline of the inner hollow shaft tooth hub 30, the inner hollow shaft 10 and the rear sun gear 9 are fixed, and the engine 28 The power is transmitted to the rear planet carrier 7 through the central shaft 1 and to the output shaft 8 through the ring gear 5 .

Hybrid mode: the sliding sleeve 31 is in the middle neutral position, the internal splines of the sliding sleeve 31 are not connected to any parts, the power of the engine 28 is transmitted to the rear planetary carrier 7 through the central shaft 1 for power splitting, and the power is split to the ring gear 5 and The rear sun gear 9 is transmitted to the generator 26 through the inner hollow shaft 10 to generate electricity. If the power is insufficient, the power of the drive motor 27 is transmitted to the front sun gear 4 through the outer hollow shaft 17 , and the power of the drive motor 27 and the power of the engine 28 are coupled at the ring gear 5 for output. When the engine 28 is in the constant speed and high-efficiency range, by controlling the speed of the generator 26, the speed of the rear sun gear 9 can be adjusted to change the speed of the output shaft 8. At this time, the speed of the engine 28 is decoupled from the vehicle speed and is infinitely variable.

When shifting gears in the pure electric mode gearbox, the sliding sleeve 31 is at the left end to lock the central shaft 1, and the power of the generator 26 is transmitted to the ring gear 5 through the inner hollow shaft 10 and the rear sun gear 9 for torque compensation. When shifting gears in the hybrid mode, the engine 28 transmits power to the ring gear 5 by driving the rear planetary carrier 7 for torque compensation. Through the torque compensation of the generator 26 and the engine 28, the output power is not interrupted during the shifting process in each working mode.

As shown in FIG. 3 , by adjusting the left, middle and right of the composite sliding sleeve 40 , the meshing of the gear hub 41 of the transfer shaft and the gear hub 44 of the rear gear of the transfer shaft, and the gear hub 43 of the power take-off shaft and the transfer shaft can be realized respectively. The meshing of the gear hub 44 of the rear gear, the meshing of the gear hub 41 of the transfer shaft and the gear hub 43 of the power take-off shaft can respectively realize the three working modes of limp home, power-taking by the drive motor and power-taking by the engine. details as follows:

Limp home mode: operate the composite sliding sleeve 40 to the leftmost position, the internal splines of the composite sliding sleeve 40 are connected with the rear gear hub 44 of the transfer shaft and the external splines of the transfer shaft gear hub 41, the sliding sleeve locking device The sliding sleeve 31 in 18 is in the middle position; when the auxiliary box synchronizer 12 is in the low gear position (the front planet carrier 3 is fixed), it is the forward gear of the limp home mode; when the auxiliary box synchronizer 12 is in the high gear position (the front planet carrier) 3 is connected with the front sun gear 4 through the synchronizer spline), which is the reverse gear in the limp home mode. According to the operating conditions of the whole vehicle, the high and low gears of the forward gear or reverse gear in the limp home mode are determined by adjusting the position of the main box synchronizer 14, so that the limp home mode has two gears for both forward gear and reverse gear. , to ensure that it can meet the needs of heavy-duty vehicles in complex working conditions. When limp home, the engine 28 can drive the vehicle normally when the electrical appliance fails. The power transmission path of the engine 28 is: the central shaft 1, the tenth transmission gear 35, the eleventh transmission gear 36, the transfer shaft 37, the transfer shaft gear hub 41 , the composite sliding sleeve 40, the rear gear hub 44 of the transfer shaft, the rear gear 39 of the transfer shaft (the high gear is the seventh transmission gear 23, the second transmission gear 15, the low gear is the seventh transmission gear 23, the connecting shaft 25, The eighth transmission gear 24, the first transmission gear 13), the outer hollow shaft 17, and the front sun gear 4 transmit the power to the ring gear 5 and the output shaft 8 in turn through the double planetary power coupling mechanism 6, for the axle 20 to pair the wheels. to drive.

Engine power take-off mode: operate the composite sliding sleeve 40 to the rightmost position, the internal splines of the composite sliding sleeve 40 are connected with the external splines of the adapter shaft tooth hub 41 and the power take-off shaft tooth hub 43, and the power transmission path of the engine 28 is: The central shaft 1, the tenth transmission gear 35, the eleventh transmission gear 36, the transfer shaft 37, the transfer shaft gear hub 41, the composite sliding sleeve 40, the power take-off shaft gear hub 43, and the power take-off shaft 42 are finally transmitted to the take-off shaft. The power device 38 is used to realize the power take-off of the engine.

Drive motor power take-off mode: operate the composite sliding sleeve 40 to the middle position, the internal spline of the composite sliding sleeve 40 is connected with the rear gear hub 44 of the transfer shaft and the external spline of the power take-off shaft gear hub 43, the power of the drive motor 27 The transmission path is: the fifth transmission gear 21, the sixth transmission gear 22, the connecting shaft 25, the seventh transmission gear 23, the rear gear 39 of the transfer shaft, the gear hub 44 of the rear gear of the transfer shaft, the composite sliding sleeve 40, the power take-off shaft The gear hub 43 and the power take-off shaft 42 are finally transmitted to the power take-off device 38, so as to realize the power take-off of the drive motor.

Through the composite sliding sleeve 40, not only the limp home mode can be realized, but also the composite power take-off of the engine and the drive motor can be realized, so as to meet the use requirements of the heavy-duty vehicle in complex working conditions.

Among them, the main box synchronizer 14 has three gears, which are respectively connected with the second transmission gear 15, connected with the first transmission gear 13 and neutral; the auxiliary box synchronizer 12 has two gears, which are respectively connected with the front sun gear 4. and connected to the housing 2. Through the gear adjustment of the main tank synchronizer 14 and the auxiliary tank synchronizer 12 , the realization of various working modes can be realized, the structure is simple, and the realization is easy.

Among them, a torsion plate 11 for connecting with the auxiliary box synchronizer 12 is installed on the casing 2 . The torque transmission plate 11 transmits torque and has high structural strength. When the auxiliary box synchronizer 12 is connected to the torsion transmission plate 11 , the reliability of the positioning of the front planetary carrier 3 is ensured and the rotation of the front planetary carrier 3 is prevented.

The engine 28 is connected to the central shaft 1 through a clutch 29 in a driving manner. The disconnection and connection of the power transmission can be realized flexibly by means of the clutch 29 .

Wherein, as shown in FIG. 1 , the generator 26 is drivingly connected with the inner hollow shaft 10 through the generator deceleration system; the generator deceleration system includes the third transmission gear 16, the fourth transmission gear 19 and the ninth transmission gear 34 meshed in sequence; The third transmission gear 16 is connected and installed with the output shaft of the generator 26 , and the ninth transmission gear 34 is connected and installed with the inner hollow shaft 10 . The generator 26 is drivingly connected to the inner hollow shaft 10 through the third transmission gear 16 , the fourth transmission gear 19 and the ninth transmission gear 34 to ensure the reliability of the power transmission of the generator 26 and the stability of reverse charging the generator 26 .

Among them, the central shaft 1 , the inner hollow shaft 10 and the outer hollow shaft 17 are respectively rotatably installed with the housing 2 through bearings. The ring gear 5 , the output shaft 8 , the central shaft of the fourth transmission gear 19 , the connecting shaft 25 , the transfer shaft 37 , and the power take-off shaft 42 are all rotatably installed with the housing 2 through bearings. The power take-off 38 , the generator 26 , the drive The motor 27 and the engine 28 are fixedly mounted on the casing 2 . It should be pointed out that the casing 2 refers to the casing that seals the transmission components and is fixedly installed with the frame; there can be multiple at the same time, such as gearbox casings, transmission casings, etc.; it can also be one, All transmission components except the axle 20, the generator 26, the engine 28, the drive motor 27, and the power take-off 38 are sealed and packaged.

The heavy truck hybrid system with compound power take-off and limp home functions has three power sources: generator 26, drive motor 27 and engine 28, and the generator 26 can be charged in reverse; the power of the drive motor 27 passes through the drive motor The transmission system is transmitted to the front sun gear 4; the power of the engine 28 is transmitted to the rear planet carrier 7 through the central shaft 1; Adjustment and reverse charging, through the double planetary power coupling mechanism 6, the three powers are coupled in different situations. The overall structure is simple, the design is compact, and the practicability is good.

The speed of the rear sun gear 9 and the rear planet carrier 7 is adjusted by the generator 26 and the engine 28 respectively, so as to realize the stepless speed change, the decoupling of the rotation speed of the engine 28 and the vehicle speed, and the engine 28 can continuously run in the high-efficiency range at a constant speed, thereby improving the fuel saving rate and the Improve vehicle running economy. Through the adjustment of the main box synchronizer 14 and the auxiliary box synchronizer 12, the range of the transmission speed ratio can be widened to enhance the power performance of the whole vehicle. By adjusting the position of the sliding sleeve 31 of the sliding sleeve locking device 18, the pure electric mode, the hybrid mode and the engine direct drive mode can be flexibly switched under complex working conditions. Through the torque compensation of the generator 26 and the engine 28, the output power is not interrupted during the shifting process in each working mode.

By adjusting the left, middle and right of the composite sliding sleeve 40, three working modes of limping home, power taking from the drive motor and power taking from the engine can be realized respectively. Realize that the power of the engine can cover all working conditions when the electric motor fails to work, and the vehicle does not need a trailer, which improves the operation efficiency. It can also realize that the engine or the motor can take power to meet the power take-off requirements of the vehicle under different working conditions, and ensure that it can meet the complex needs of heavy-duty vehicles. operating conditions.

This heavy-duty truck hybrid system with composite power take-off and limp home functions can be widely used in the field of new energy commercial vehicles, especially for heavy-duty trucks with complex working conditions and many up and down slopes. It also improves the comfort, safety and economy of the whole vehicle, has broad prospects for promotion and application, and has good practicability.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

The terms "upper", "lower", "outside", "inside", etc. in the description and claims of the present invention and the above-mentioned drawings, if present, are used to distinguish the relative relationship in position, and are not necessarily qualitative. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A heavy truck hybrid system with combined power take-off and limp home functions is characterized by comprising a shell (2), a generator (26), a driving motor (27), an engine (28), an axle (20), a double-planet-row power coupling mechanism (6), a transfer shaft (37) and a power take-off (38);

the double-planet-row power coupling mechanism (6) comprises a front planet-row power coupling mechanism and a rear planet-row power coupling mechanism, outer rings of planet gears of the front planet-row power coupling mechanism and the rear planet-row power coupling mechanism are meshed with a gear ring (5) together, and the gear ring (5) is in transmission connection with an axle (20);

the engine (28) is connected with a rear planet carrier (7) of the rear planet row power coupling mechanism through a central shaft (1); a rear sun gear (9) of the rear planet row power coupling mechanism is connected with an inner hollow shaft (10), and a generator (26) is in transmission connection with the inner hollow shaft (10); the front sun gear (4) of the front planet row power coupling mechanism is connected with an outer hollow shaft (17), and a driving motor (27) is in transmission connection with the outer hollow shaft (17) through a driving motor gearbox system;

the transfer shaft (37) is in transmission connection with the central shaft (1), a transfer shaft gear hub (41) is installed on the transfer shaft, a transfer shaft rear gear (39) meshed with a gear in a drive motor gearbox system is rotatably installed on the transfer shaft rear gear (39), and a transfer shaft rear gear hub (44) is connected to the transfer shaft rear gear (39);

the power takeoff (38) is connected with a power takeoff shaft gear hub (43) through a power takeoff shaft (42);

the shell (2) is provided with a sliding sleeve locking device (18) which can respectively lock the central shaft (1) and the inner hollow shaft (10) and a composite sliding sleeve (40) which can respectively connect the rear gear hub (44) of the transfer shaft, the transfer shaft hub (41) and the power take-off shaft hub (43) in pairs.

2. The hybrid heavy truck system with combined power take-off and limp home function according to claim 1, characterized in that the central shaft (1), the inner hollow shaft (10) and the outer hollow shaft (17) are coaxially arranged from inside to outside.

3. The hybrid heavy-truck system with hybrid power take-off and limp-home functions as claimed in claim 1, wherein the drive motor gearbox system comprises a fifth transmission gear (21) connected with an output shaft of the drive motor (27), a sixth transmission gear (22), a seventh transmission gear (23) and an eighth transmission gear (24) connected and installed through a connecting shaft (25); the fifth transmission gear (21) is meshed with the sixth transmission gear (22); a second transmission gear (15) and a first transmission gear (13) which are respectively meshed with a seventh transmission gear (23) and an eighth transmission gear (24) are rotatably arranged on the outer hollow shaft (17); a main box synchronizer (14) which can be respectively connected with the second transmission gear (15) and the first transmission gear (13) is arranged on the outer hollow shaft (17); and a front planet carrier (3) of the front planet row power coupling mechanism is provided with an auxiliary box synchronizer (12) which can be respectively connected with the front sun gear (4) and the shell (2).

4. The hybrid heavy-truck system with combined power take-off and limp-home functions as claimed in claim 3, wherein a tenth transmission gear (35) is mounted on the central shaft (1), and an eleventh transmission gear (36) meshed with the tenth transmission gear (35) is mounted on the transfer shaft (37); the rear gear (39) of the transfer shaft is meshed with the seventh transmission gear (23).

5. The hybrid heavy truck system with hybrid power take-off and limp home function as claimed in claim 1, wherein the sliding sleeve locking device (18) comprises a central shaft gear hub (33) installed in connection with the central shaft (1), an inner hollow shaft gear hub (30) installed in connection with the inner hollow shaft (10), and a sliding sleeve (31) installed on the housing (2); the sliding sleeve (31) has three gears, namely a gear connected with the central shaft gear hub (33), a gear connected with the inner hollow shaft gear hub (30) and a neutral gear.

6. The hybrid heavy truck system with hybrid power take-off and limp-home functionality according to claim 3, characterized in that the main box synchronizer (14) has three gears, respectively connected to the second transmission gear (15), to the first transmission gear (13) and neutral; the auxiliary box synchronizer (12) is provided with two gears which are respectively connected with the first transmission gear (13) and the shell (2).

7. The hybrid heavy truck system with hybrid power take-off and limp home function according to claim 3, characterized in that the housing (2) is mounted with a torque plate (11) for connection with the sub-tank synchronizer (12).

8. The hybrid heavy truck system with hybrid power take-off and limp-home functionality according to claim 1, characterized in that the engine (28) is in driving connection with the central shaft (1) via a clutch (29).

9. The hybrid heavy truck system with hybrid power take-off and limp-home functionality according to claim 1, characterized in that the generator (26) is in driving connection with the inner hollow shaft (10) through a generator reduction system; the generator speed reduction system comprises a third transmission gear (16), a fourth transmission gear (19) and a ninth transmission gear (34) which are meshed in sequence; the third transmission gear (16) is connected with an output shaft of the generator (26), and the ninth transmission gear (34) is connected with the inner hollow shaft (10).

10. The hybrid heavy truck system with combined power take-off and limp home functions as claimed in claim 1, characterized in that the central shaft (1), the inner hollow shaft (10) and the outer hollow shaft (17) are rotatably mounted with the housing (2) by means of bearings, respectively.

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