Hybrid power system, transmission mechanism of hybrid power system, range extender and vehicle comprising hybrid power system

Abstract

The utility model provides a hybrid power system, a transmission mechanism of the hybrid power system, a range extender and a vehicle comprising the range extender. The transmission mechanism comprises an internal combustion engine transmission assembly used for being in transmission connection with an internal combustion engine. The motor transmission assembly is in transmission connection with a motor; the wheel transmission assembly is in transmission connection with wheels; the jaw clutch comprises a first meshing part arranged on the internal combustion engine transmission assembly, a second meshing part arranged on the motor transmission assembly and a third meshing part arranged on the wheel transmission assembly; and the second meshing part can be axially moved, so that the second meshing part is in meshing connection with the first meshing part at the first axial position, the second meshing part is disconnected from the third meshing part at the second axial position, and the second meshing part is in meshing connection with the third meshing part at the third axial position. According to the utility model, different transmission requirements are met by switching the connection conditions of the transmission components through the jaw clutch, the switching response speed is high, the switching efficiency is high, the switching is smooth, and the driving experience of a user can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a hybrid power system and a transmission mechanism thereof, a range extender and a vehicle comprising the same. Background Art

[0002] The power system of pure electric vehicles generally consists of three parts: drive motor, controller, and power battery. Due to the power supply characteristics of the power system, pure electric vehicles usually face range anxiety when in use. To alleviate range anxiety, the automotive industry has introduced hybrid vehicles. Hybrid vehicles refer to vehicles that are equipped with two power sources at the same time - thermal power source (generated by traditional gasoline or diesel engines) and electric power source (power battery and drive motor).

[0003] Among them, the extended-range model of hybrid vehicles adds an internal combustion engine and a generator to the pure electric vehicle. When the power battery is low on power, the internal combustion engine acts as an energy compensation device to drive the generator to generate electricity to charge the power battery and extend the vehicle's endurance.

[0004] Current regulations require that the internal combustion engine in a range-extended hybrid vehicle can only be used to charge the power battery, but cannot provide driving power for the vehicle, that is, when the vehicle is running, only the drive motor can provide driving power to the vehicle. Current range-extended hybrid vehicles usually include a drive motor, an internal combustion engine, and a generator, of which the internal combustion engine and the generator are specifically used for power generation and do not participate in the driving of the vehicle. However, when the current range-extended hybrid vehicles switch between the charging working mode and the idle mode, there are problems such as slow response speed and incomplete decoupling of the internal combustion engine and the generator, which affects the user's driving experience. Utility Model Content

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a hybrid power system and a vehicle to improve the response speed and smoothness of the switching of the working modes of the extended-range hybrid vehicle and enhance the user's driving experience.

[0006] The present invention provides a hybrid power system, comprising:

[0007] An internal combustion engine transmission assembly, the internal combustion engine transmission assembly is used for transmission connection with the internal combustion engine;

[0008] A motor transmission assembly, the motor transmission assembly is used to be connected to the motor transmission;

[0009] A wheel transmission assembly, the wheel transmission assembly is used for connecting with the wheel transmission;

[0010] A tooth clutch comprises a first meshing portion, a second meshing portion and a third meshing portion, wherein the first meshing portion is arranged on the internal combustion engine transmission assembly, the second meshing portion is arranged on the motor transmission assembly, and the third meshing portion is arranged on the wheel transmission assembly; wherein the second meshing portion can be axially moved to mesh with the first meshing portion at a first axial position, to be disconnected from the first meshing portion and the third meshing portion at a second axial position, and to mesh with the third meshing portion at a third axial position.

[0011] In some embodiments, the first meshing portion is provided with a first meshing tooth at one end close to the second meshing portion, the second meshing portion is provided with a second meshing tooth at one end close to the first meshing portion, the second meshing portion is provided with a third meshing tooth at one end close to the third meshing portion, and the third meshing portion is provided with a fourth meshing tooth at one end close to the second meshing portion;

[0012] The first meshing portion and the second meshing portion may be meshed and connected via the first meshing teeth and the second meshing teeth, and the second meshing portion and the third meshing portion may be meshed and connected via the third meshing teeth and the fourth meshing teeth.

[0013] In some embodiments, the first meshing portion includes an external spline, the second meshing portion includes an internal spline, and the third meshing portion includes an external spline, and the internal spline of the second meshing portion is capable of meshing and connecting with the external spline of the first meshing portion at the first axial position and meshing and connecting with the external spline of the third meshing portion at the third axial position.

[0014] In some embodiments, the motor transmission assembly includes a second output shaft;

[0015] The second meshing portion of the dog clutch can be axially slidably sleeved on the outer side of the second output shaft and is rotationally fixedly connected to the second output shaft.

[0016] In some embodiments, the motor transmission assembly further includes an input shaft, and the input shaft and the second output shaft are transmission-connected via a reduction gear set.

[0017] In some embodiments, the reduction gear set includes a planetary gear mechanism.

[0018] In some embodiments, the internal combustion engine transmission assembly includes a first output shaft, the first meshing portion is formed on the first output shaft or is rotationally fixedly connected to the first output shaft, the second meshing portion is axially movably mounted on the second output shaft via a spline, and the third meshing portion is rotatably mounted on the second output shaft via a bearing.

[0019] In some embodiments, the wheel transmission assembly includes a gear, a differential and a half-shaft rotatably mounted on the second output shaft of the motor transmission assembly, the third meshing portion is connected to the gear transmission or is formed integrally with the gear, the differential includes a driven gear half-shaft gear, the driven gear is connected to the gear transmission, and the half-shaft gear is connected to the wheel through the half-shaft.

[0020] In some embodiments, the internal combustion engine transmission assembly includes a torsional vibration damper disposed between the internal combustion engine and the first meshing portion.

[0021] In some embodiments, a fork mechanism for the tooth clutch is further included, the fork mechanism comprising a fork and a fork shaft, the first end of the fork is fixedly connected to the fork shaft so that the fork moves with the fork shaft, the second end of the fork is connected to the second meshing portion, and the fork mechanism can drive the second meshing portion to move along the axial direction of the second output shaft so that the second meshing portion is in any one axial position of the first axial position, the second axial position or the third axial position.

[0022] In some embodiments, a driving mechanism is further included, wherein the driving mechanism drives the fork mechanism to move along a first direction.

[0023] The present utility model also provides a range extender for a hybrid power system of a vehicle, the range extender comprising:

[0024] The transmission mechanism as described above, and

[0025] A motor is transmission-connected to the motor transmission assembly of the transmission mechanism.

[0026] The present invention also provides a hybrid power system for a vehicle, comprising:

[0027] A range extender as described above, and

[0028] an internal combustion engine, the internal combustion engine being drivingly connected to an internal combustion engine transmission assembly of a transmission mechanism of the range extender,

[0029] in,

[0030] When the hybrid power system is in the first working mode, the second meshing portion is meshed and connected with the first meshing portion;

[0031] When the hybrid power system is in the second working mode, the second meshing portion is not meshed and connected with the first meshing portion or the second meshing portion;

[0032] When the hybrid power system is in the third working mode, the second meshing portion is meshed and connected with the third meshing portion. The embodiment of the utility model further provides a vehicle, comprising the hybrid power system as described above.

[0033] The hybrid power system and its transmission mechanism, range extender and vehicle including the same provided by the utility model have the following advantages:

[0034] When the second meshing part of the tooth clutch is meshed with the first meshing part, the internal combustion engine transmission assembly and the motor transmission assembly are connected in transmission, so that the motor generates electricity and then charges the battery, thereby improving the vehicle's endurance; when the second meshing part of the tooth clutch is connected with the third meshing part, the motor transmission assembly and the wheel transmission assembly are connected in transmission, and the motor in the power system drives the wheels to run, thereby realizing the operation of the vehicle; when the second meshing part of the tooth clutch is not meshed with the first meshing part and the third meshing part, the internal combustion engine transmission assembly, the motor transmission assembly and the wheel transmission assembly are completely decoupled, and the power system has no power output and does not generate electricity. The transmission connection status of each transmission assembly is switched by the meshing status of each meshing part of the tooth clutch to achieve different transmission requirements, with fast switching response speed and high smoothness, thereby improving the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0036] Figure 1 is a schematic diagram of a hybrid power system according to an embodiment of the utility model;

[0037] Figure 2 is a three-dimensional diagram of a hybrid power system according to an embodiment of the utility model;

[0038] Figure 3 This is a front view of a tooth clutch according to an embodiment of the present utility model;

[0039] Figure 4 It is a top view of a tooth clutch according to an embodiment of the utility model.

[0040] Reference numerals:

[0041] 10 Internal combustion engine transmission components 32 Differential

[0042] 11 First output shaft 321 Driven gear

[0043] 12 Torsional vibration damper 33 Axle shaft

[0044] 20 Motor transmission assembly 322 Axle shaft gear

[0045] 21 Input shaft 40 Tooth clutch

[0046] 22 Second output shaft 41 First meshing portion

[0047] 23 Planetary reduction mechanism 42 Second meshing portion

[0048] RG Ring gear 43 Third meshing part

[0049] SG Sun gear 44 Shift fork

[0050] PG planetary gear 50 internal combustion engine

[0051] PC Planetary Bracket 60 Motor

[0052] 30 Wheel drive assembly 70 Fork mechanism

[0053] 311 gear 71 fork

[0054] 312 Idler wheel 72 Fork shaft

[0055] 80 Drive mechanism DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0057] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In order to solve the problems in the prior art, the present invention provides a transmission mechanism for a hybrid power system of a vehicle. Figures 1 to 4 As shown, the transmission mechanism includes an internal combustion engine transmission assembly 10, a motor transmission assembly 20, a wheel transmission assembly 30 and a dog clutch 40. The internal combustion engine transmission assembly 10 is used for transmission connection with the internal combustion engine 50, the motor transmission assembly 20 is used for transmission connection with the motor 60, and the wheel transmission assembly 30 is used for transmission connection with the wheel; the dog clutch 40 includes a first meshing portion 41, a second meshing portion 42 and a third meshing portion 43, the first meshing portion 41 is arranged on the internal combustion engine transmission assembly 10, and the second meshing portion 42 is arranged on the motor transmission assembly 20; the second meshing portion 42 can be axially moved to mesh with the first meshing portion 41 at a first axial position, disconnected from the first meshing portion 41 and the third meshing portion 43 at a second axial position, and meshed with the third meshing portion 43 at a third axial position.

[0060] When the second meshing part 42 is meshed with the first meshing part 41, the internal combustion engine transmission assembly 10 is connected to the motor transmission assembly 20, and the internal combustion engine 50 can transmit torque to the motor 60 through the internal combustion engine transmission assembly 10, so that the motor 60 generates electricity and then charges the battery; when the second meshing part 42 is meshed with the third meshing part 43, the motor transmission assembly 20 is connected to the wheel transmission assembly 30, and the output torque of the motor can be transmitted to the wheel through the wheel transmission assembly 30 to drive the vehicle to travel; when the second meshing part is disconnected from the first meshing part 41 and the third meshing part 43, the internal combustion engine transmission assembly 10, the motor transmission assembly 20 and the wheel transmission assembly 30 are completely decoupled, and the transmission mechanism has no torque output and does not generate electricity. The tooth clutch can switch the transmission connection of each transmission assembly to meet the transmission requirements of the transmission mechanism, with fast switching response speed, high switching efficiency and smooth switching, which can improve the user's driving experience.

[0061] Please continue reading Figures 1 to 4 The first meshing part 41 has a first meshing tooth at one end close to the second meshing part 42, the second meshing part 42 has a second meshing tooth at one end close to the first meshing part 41, the second meshing part 42 has a third meshing tooth at one end close to the third meshing part, and the third meshing part 43 has a fourth meshing tooth at one end close to the second meshing part. That is, the first meshing part 41 and the third meshing part 43 have single-sided meshing teeth, while the second meshing part 42 has double-sided meshing teeth.

[0062] The first toothed portion 41 and the second toothed portion 42 are meshed and connected via the first meshing teeth and the second meshing teeth, and the second toothed portion 42 and the third toothed portion 43 are meshed and connected via the third meshing teeth and the fourth toothed portion.

[0063] The tooth clutch 40 is free from friction and adhesion when disengaging and engaging, has high transmission efficiency, fast response speed, rapid and smooth engagement and separation, and flexible mode switching, thereby improving the stability and flexibility of vehicle operation and enhancing the user's driving experience.

[0064] In another embodiment, the first meshing portion 41 may include an external spline, the second meshing portion 42 may include an internal spline, and the third meshing portion 43 may include an external spline. The internal spline of the second meshing portion 42 can be meshed and connected with the external spline of the first meshing portion 41 at a first axial position, and meshed and connected with the external spline of the third meshing portion 43 at a third axial position.

[0065] Further, the motor transmission assembly 20 includes a second output shaft 22, and the second meshing portion 42 of the dog clutch 40 is axially slidably sleeved on the outer side of the second output shaft 22 and is rotationally fixedly connected to the second output shaft 22. When the motor 60 outputs torque through the motor transmission assembly 20, the second meshing portion 42 rotates with the second output shaft 22, thereby outputting torque.

[0066] Further, the motor transmission assembly 20 includes an input shaft 21, and the input shaft 21 and the second output shaft 22 are connected by a reduction gear set. The reduction gear set is used to reduce the speed of the motor 60 and increase the output torque. In some cases, the motor transmission assembly 20 may only include the second output shaft 22 directly connected to the motor, without including the reduction gear set.

[0067] The reduction gear set in the embodiment of the utility model includes a planetary gear mechanism 23, which includes a sun gear SG, a ring gear RG coaxially arranged around the sun gear SG, a planetary gear PG meshing between the sun gear SG and the ring gear RG, and the center of each planetary gear PG is connected to the planet carrier PC; the input shaft 21 is connected to the center of the sun gear SG; and the second output shaft 22 is coaxially connected to the planet carrier PC. In this embodiment, the planetary gear mechanism fixes the ring gear RG during specific operation. When the sun gear SG rotates, it drives the planetary gear PG to rotate, and then the planetary gear PG drives the planet carrier PC to rotate, and then the planet carrier PC drives the second output shaft 22 to rotate. Similarly, when the ring gear RG is fixed and the second output shaft 22 rotates, the input shaft 21 will rotate accordingly through the transmission of the planet carrier PC, the planetary gear PG and the sun gear SG.

[0068] However, the motor transmission assembly 20 is not limited to only one planetary gear mechanism. In other embodiments, it may also include a multi-speed transmission mechanism composed of multiple planetary gear mechanisms, and different transmission gear ratios are formed by combining different components of the planetary gear mechanism. The multi-speed transmission mechanism can improve the smoothness of gear shifting and improve the transmission efficiency.

[0069] Further, the internal combustion engine transmission assembly 10 includes a first output shaft 11, a first meshing portion 41 is formed on the first output shaft 11 or is rotationally fixedly connected to the first output shaft 11; the second meshing portion 42 is axially movably sleeved on the second output shaft 22 through a spline, and the third meshing portion 43 is rotatably sleeved on the second output shaft 22 through a bearing. The first meshing portion 41 can follow the first output shaft 11 to make a rotational movement when the first output shaft 11 makes a rotational movement. The second meshing portion 42 can be axially movably sleeved on the second output shaft 22 through a spline, so that the second meshing portion 42 can follow the second output shaft 22 to make a rotational movement, and can also move in the axial direction of the second output shaft 22 to mesh with or disconnect the first meshing portion 41 or the third meshing portion 43. Due to the existence of the bearing, when the second output shaft 22 makes a rotational movement, the third meshing portion 43 does not rotate with the second output shaft 22.

[0070] See also Figure 3 The transmission mechanism also includes a fork mechanism 70 for the tooth clutch 40, the fork mechanism includes a fork 71 and a fork shaft 72, the first end of the fork 71 is fixedly connected to the fork shaft 72 so that the fork 71 moves with the fork shaft 72, the second end of the fork 71 is connected to the second meshing portion 42, the fork mechanism 70 can drive the second meshing portion 42 to move along the axial direction of the second output shaft 22, so that the second meshing portion 42 is in any one of the first axial position, the second axial position or the third axial position, so as to achieve different transmission requirements.

[0071] Furthermore, the transmission mechanism further includes a driving mechanism 80, and the driving mechanism 80 drives the fork mechanism 70 to move along a first direction. The first direction here is the left-right direction as viewed from the paper surface, such as Figure 3 As shown, the fork mechanism 70 is now in the first axial position, so that the first meshing portion 41 is meshed and connected with the second meshing portion 42. When the fork mechanism moves rightward to the third axial position, the third meshing portion 43 is meshed and connected with the second meshing portion 42. When the fork mechanism moves rightward to the second axial position, the second meshing portion 42 is disconnected from the first meshing portion 41 and the third meshing portion 43.

[0072] For further information, please refer to Figure 1 and Figure 2The wheel transmission assembly 30 includes a gear 311 rotatably sleeved on the second output shaft 22 of the motor transmission assembly 20, a differential 32 and a half shaft 33, the third meshing portion 43 is drivingly connected to the gear 311 or is formed integrally with the gear 311, the differential 32 includes a driven gear 321 and a half shaft gear 322, the driven gear 321 is drivingly connected to the gear 311 (in the illustrated embodiment, via the idler gear 312), and the half shaft gear 322 is connected to the wheel through the half shaft 33. The differential 32 allows the half shaft 33 to rotate at different speeds, ensuring power transmission under various motion conditions and preventing the wheel from slipping on the ground.

[0073] like Figure 1 and Figure 2 As shown, in this embodiment, the wheel transmission assembly 30 further includes an idler wheel 312 configured as an idler wheel, and the idler wheel 312 is meshed with the gear 311 and the driven gear 321 of the differential 32. When the second output shaft 22 rotates, the second meshing portion 42 is driven to rotate, and when the third meshing portion 43 is meshed and connected with the second meshing portion 42, the third meshing portion 43 and the gear 311 are correspondingly driven to rotate, and the gear 311 further transmits the torque to the idler wheel 312, and the idler wheel 312 transmits the torque to the half-shaft gear 322 through the driven gear 321, and the half-shaft gear 322 outputs the torque to the wheel through the half-shaft 33, so as to drive the wheel to run, and realize the motor-driven vehicle travel.

[0074] like Figure 1 As shown, in some embodiments, the internal combustion engine transmission assembly 10 also includes a torsional vibration damper 12, which is arranged between the internal combustion engine 50 and the first meshing portion 41 to play a role in buffering and shock absorption, thereby reducing the vibration of the internal combustion engine 50 during power transmission and ensuring the smoothness of power transmission.

[0075] The embodiment of the utility model also provides a range extender of a hybrid power system of a vehicle, comprising the transmission mechanism and the motor 60 as described above, wherein the motor 60 is in transmission connection with the motor transmission assembly 20. The electric energy generated by the range extender can charge the battery, and can provide additional electric energy to increase the driving mileage of the electric vehicle.

[0076] Furthermore, the embodiment of the utility model also provides a hybrid power system for a vehicle, comprising the range extender and the internal combustion engine 50 as described above, wherein the internal combustion engine 50 is in transmission connection with the internal combustion engine transmission assembly 10 of the transmission mechanism of the range extender; wherein,

[0077] When the hybrid system is in the first working mode, the second meshing portion 42 is meshed and connected with the first meshing portion 41;

[0078] When the hybrid system is in the second working mode, the second meshing portion 42 is not meshed and connected with the first meshing portion 41 or the second meshing portion 42;

[0079] When the hybrid system is in the third operating mode, the second meshing portion 42 is meshed and connected with the third meshing portion 43 .

[0080] Based on the above introduction to the various components in the hybrid power system, the working mode of the hybrid power system is introduced below.

[0081] The first working mode here is the power generation working mode. Specifically, when the first working mode is operated, the internal combustion engine 50 is started first, and the first output shaft 11 of the internal combustion engine transmission assembly 10 rotates under the action of the internal combustion engine 50, thereby driving the first meshing portion 41 to rotate. When the second meshing portion 42 moves toward the direction close to the first meshing portion 41 and meshes with the first meshing portion 41, the first meshing portion 41 drives the second meshing portion 42 to rotate, and the second meshing portion 42 drives the second output shaft 22 of the motor transmission assembly 20 to rotate, and the output torque of the second output shaft 22 is transmitted to the rotating shaft of the motor 60 through the transmission of the reduction gear set. When the rotating shaft rotates, the motor 60 can charge the battery as a generator to increase the storage capacity of the battery.

[0082] The second working mode here is a decoupled working mode, that is, the hybrid power system is not charged, and the vehicle wheels are not driven by the motor. Specifically, when the second working mode is running, the second meshing portion 42 is not meshed with the first meshing portion 41 and the second meshing portion 42, and the internal combustion engine transmission assembly 10, the motor transmission assembly 20 and the wheel transmission assembly 30 are completely decoupled.

[0083] The third working mode here is a pure electric drive mode. Specifically, when the third working mode is running, the second meshing part 42 and the third meshing part 43 are meshed and connected, the motor 60 transmits torque to the input shaft 21 of the motor transmission assembly 20 through the rotating shaft transmission, and the torque is transmitted to the second output shaft 22 after being decelerated by the reduction gear set, and the second meshing part 42 rotates with the second output shaft 22, thereby driving the third meshing part 43 to rotate, and the torque of the third meshing part 43 is further transmitted to the differential 32 through the gear 311 and the idler gear 312. After the differential 32 is further decelerated, the differential 32 outputs power to the wheels through the half shaft 33 to drive the vehicle wheels to rotate.

[0084] By controlling the connection status of each meshing part of the tooth clutch 40 in different states, the hybrid power system is placed in different working modes. There is no friction or adhesion when the tooth clutch 40 is disengaged and engaged, and the transmission efficiency is high, the response speed is fast, the engagement and separation are rapid and smooth, and the mode switching is flexible, thereby improving the stability and flexibility of the vehicle operation and enhancing the user's driving experience.

[0085] The embodiment of the present invention further provides a vehicle, including the hybrid power system as described above. The vehicle provided by the embodiment of the present invention can achieve all the technical effects of the hybrid power system as described above, which will not be described in detail here.

[0086] Furthermore, the range extender or vehicle including the above transmission mechanism has a controller for controlling the drive mechanism 80 to move the second meshing portion 42 along the axial direction of the second output shaft 22 under different transmission demand modes to achieve transmission connection of different transmission components.

[0087] In summary, the hybrid power system and its transmission mechanism, range extender and vehicle including the same provided by the utility model have the following advantages:

[0088] When the second meshing part is meshed with the first meshing part, the internal combustion engine transmission assembly and the motor transmission assembly are connected in transmission, so that the motor acts as a generator to generate electricity, and then charges the battery, thereby improving the vehicle's endurance; when the second meshing part is meshed with the third meshing part, the motor transmission assembly and the wheel transmission assembly are connected in transmission, driving the wheels to rotate and realizing the vehicle's travel; when the second meshing part is disconnected from the first meshing part and the third meshing part, the hybrid power system has no power output and does not generate electricity. The utility model switches the transmission connection of the internal combustion engine transmission assembly, the motor transmission assembly and the wheel transmission assembly through a tooth clutch, has high transmission efficiency and fast response speed, and has the advantages of rapid and stable separation and high smoothness, thereby improving the user's driving experience.

[0089] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A transmission mechanism for a hybrid power system of a vehicle, characterized in that: include: An internal combustion engine transmission assembly, the internal combustion engine transmission assembly is used for transmission connection with the internal combustion engine; A motor transmission assembly, the motor transmission assembly is used to be connected to the motor transmission; A wheel transmission assembly, the wheel transmission assembly is used for connecting with the wheel transmission; A tooth clutch comprises a first meshing portion, a second meshing portion and a third meshing portion, wherein the first meshing portion is arranged on the internal combustion engine transmission assembly, the second meshing portion is arranged on the motor transmission assembly, and the third meshing portion is arranged on the wheel transmission assembly; wherein the second meshing portion can be axially moved to mesh with the first meshing portion at a first axial position, to be disconnected from the first meshing portion and the third meshing portion at a second axial position, and to mesh with the third meshing portion at a third axial position.

2. The transmission mechanism according to claim 1, characterized in that: The first meshing portion is provided with a first meshing tooth at one end close to the second meshing portion, the second meshing portion is provided with a second meshing tooth at one end close to the first meshing portion, the second meshing portion is provided with a third meshing tooth at one end close to the third meshing portion, and the third meshing portion is provided with a fourth meshing tooth at one end close to the second meshing portion; The first meshing portion and the second meshing portion may be meshed and connected via the first meshing teeth and the second meshing teeth, and the second meshing portion and the third meshing portion may be meshed and connected via the third meshing teeth and the fourth meshing teeth.

3. The transmission mechanism according to claim 1, characterized in that: The first meshing portion includes an external spline, the second meshing portion includes an internal spline, and the third meshing portion includes an external spline, wherein the internal spline of the second meshing portion can be meshed and connected with the external spline of the first meshing portion at the first axial position and meshed and connected with the external spline of the third meshing portion at the third axial position.

4. The transmission mechanism according to claim 2 or 3, characterized in that: The motor transmission assembly includes a second output shaft; The second meshing portion of the dog clutch can be axially slidably sleeved on the outer side of the second output shaft and is rotationally fixedly connected to the second output shaft.

5. The transmission mechanism according to claim 4, characterized in that: The motor transmission assembly also includes an input shaft, and the input shaft and the second output shaft are transmission-connected via a reduction gear set.

6. The transmission mechanism according to claim 5, characterized in that: The reduction gear set includes a planetary gear mechanism.

7. The transmission mechanism according to claim 4, characterized in that: The internal combustion engine transmission assembly includes a first output shaft, the first meshing portion is formed on the first output shaft or is rotationally fixedly connected to the first output shaft, the second meshing portion is axially movably sleeved on the second output shaft via a spline, and the third meshing portion is rotatably sleeved on the second output shaft via a bearing.

8. The transmission mechanism according to claim 1, characterized in that: The wheel transmission assembly includes a gear, a differential and a half-shaft rotatably mounted on the second output shaft of the motor transmission assembly. The third meshing portion is connected to the gear transmission or formed integrally with the gear. The differential includes a driven gear half-shaft gear, which is connected to the gear transmission. The half-shaft gear is connected to the wheel through the half-shaft.

9. The transmission mechanism according to claim 1, characterized in that: The internal combustion engine transmission assembly includes a torsion damper, which is arranged between the internal combustion engine and the first meshing part.

10. The transmission mechanism according to claim 4, characterized in that: It also includes a fork mechanism for the tooth clutch, the fork mechanism including a fork and a fork shaft, the first end of the fork is fixedly connected to the fork shaft so that the fork moves with the fork shaft, the second end of the fork is connected to the second meshing portion, and the fork mechanism can drive the second meshing portion to move along the axial direction of the second output shaft so that the second meshing portion is in any one axial position of the first axial position, the second axial position or the third axial position.

11. The transmission mechanism according to claim 10, characterized in that: It also includes a driving mechanism, which drives the fork mechanism to move along a first direction.

12. A range extender for a hybrid power system of a vehicle, characterized in that: The range extender comprises: The transmission mechanism according to any one of claims 1 to 11, and A motor is transmission-connected to the motor transmission assembly of the transmission mechanism.

13. A hybrid power system for a vehicle, characterized in that: include: The range extender as claimed in claim 12, and an internal combustion engine, the internal combustion engine being drivingly connected to an internal combustion engine transmission assembly of a transmission mechanism of the range extender, in, When the hybrid power system is in the first working mode, the second meshing portion is meshed and connected with the first meshing portion; When the hybrid power system is in the second working mode, the second meshing portion is not meshed and connected with the first meshing portion or the second meshing portion; When the hybrid power system is in the third operation mode, the second meshing portion is meshed and connected with the third meshing portion.

14. A vehicle, characterized in that: Comprising the hybrid power system as claimed in claim 13.

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