Hybrid system for a vehicle and transmission mechanism, range extender and vehicle thereof

Abstract

The utility model provides a kind of hybrid power system and its transmission mechanism, range extender and vehicle for vehicle.The mechanism includes internal combustion engine transmission subassembly, with internal combustion engine transmission connection;Motor transmission subassembly, with motor transmission connection;Wheel transmission subassembly, including planetary gear set, differential and synchronizer, planetary gear set includes sun gear, planet carrier and gear ring, sun gear is transmission connection with motor transmission subassembly, planet carrier is connected with the shell of differential, the output shaft of differential is connected with wheel;Clutch, for making internal combustion engine transmission subassembly with motor transmission connection or decoupling;Synchronizer can fix gear ring and not rotate, make planet carrier output first gear speed;Synchronizer can not fix any rotating element of planetary gear set, make wheel transmission subassembly and wheel decoupling;Synchronizer can fix connection gear ring and planet carrier, make planet carrier output second gear speed.The transmission mechanism of the utility model can satisfy multiple transmission needs, each transmission mode switches smoothly, improves driving experience.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, specifically to a hybrid power system for vehicles, its transmission mechanism, range extender, and the vehicle itself. Background Technology

[0002] The powertrain system of a pure electric vehicle generally consists of three parts: a drive motor, a controller, and a power battery. Limited by the power supply characteristics of the powertrain, pure electric vehicles typically face range anxiety during use. To alleviate range anxiety, the automotive industry has introduced hybrid electric vehicles. Hybrid electric vehicles are vehicles equipped with two power sources simultaneously—a thermal power source (generated by a conventional gasoline or diesel engine) and an electric power source (power battery and drive motor).

[0003] In parallel hybrid vehicles, both the internal combustion engine and the electric motor can drive one or more drive wheels through the vehicle's transmission unit, improving the vehicle's range. However, current parallel hybrid vehicles suffer from uneven switching between operating modes, affecting the user's driving experience. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of this utility model is to provide a hybrid power system for vehicles, its transmission mechanism, range extender and vehicle, to meet various transmission requirements and improve the user's driving experience.

[0005] This utility model embodiment provides a transmission mechanism for a hybrid power system in a vehicle, comprising:

[0006] An internal combustion engine transmission assembly, wherein the internal combustion engine transmission assembly is used for transmission connection with an internal combustion engine;

[0007] A motor drive assembly, the motor drive assembly being used for connection with a motor drive;

[0008] A wheel drive assembly for connection to a wheel drive;

[0009] A clutch is provided on the internal combustion engine transmission assembly or the electric motor transmission assembly, and is used to connect or decouple the internal combustion engine transmission assembly and the electric motor transmission assembly in a transmission manner.

[0010] The wheel drive assembly includes a planetary gear set, a differential, and a synchronizer. The planetary gear set includes a sun gear, a planet carrier, and a ring gear. The sun gear is connected to the motor drive assembly. The planet carrier is connected to the housing of the differential. The output shaft of the differential is connected to the wheel.

[0011] When the synchronizer fixes the gear ring to prevent it from rotating and the sun gear rotates, the planet carrier outputs a first-speed rotation.

[0012] When the synchronizer does not fix any rotating element of the planetary gear set, the wheel drive assembly is decoupled from the wheel;

[0013] When the synchronizer fixes the gear ring to the planet carrier and the sun gear rotates, the planet carrier outputs a second speed.

[0014] In some embodiments, the synchronizer further includes a fixed housing, and includes an engagement sleeve, a first engagement ring, and a second engagement ring. The engagement sleeve is disposed on the ring and is movably connected to the ring along the axial direction of the ring. The first engagement ring is disposed on the fixed housing, and the second engagement ring is disposed on the planetary carrier.

[0015] When the engagement sleeve is in the first axial position, the engagement sleeve engages with and locks with the first engagement ring;

[0016] When the engagement sleeve is in the second axial position, the engagement sleeve does not engage with the first engagement tooth ring, nor with the second engagement tooth ring;

[0017] When the engagement sleeve is in the third axial position, the engagement sleeve engages with and locks with the second engagement ring.

[0018] In some embodiments, the motor drive assembly includes a first input shaft and a first output shaft, and the wheel drive assembly further includes a first gear, a second input shaft, and a second gear; the first gear is fixed on the first output shaft, the sun gear is fixed on a first end of the second input shaft, the second gear is fixed on a second end of the second input shaft, and the first gear and the second gear are meshed together.

[0019] In some embodiments, the first input shaft and the first output shaft are connected by a reduction gear set, and the planetary carrier of the reduction gear set is fixedly connected to the first output shaft.

[0020] In some embodiments, the motor transmission assembly includes a first input shaft, a reduction gear set, a first output shaft, and a fixed housing. The first input shaft and the first output shaft are connected by the reduction gear set. The planetary carrier of the reduction gear set is fixedly connected to the fixed housing. The first output shaft is fixedly connected to the ring gear of the reduction gear set. The wheel transmission assembly further includes a second input shaft and a second gear. The sun gear is fixed to a first end of the second input shaft, and the second gear is fixed to a second end of the second input shaft. The ring gear of the reduction gear set meshes with the second gear.

[0021] In some embodiments, the internal combustion engine transmission assembly includes a second output shaft, and the clutch is disposed on the first output shaft or the second output shaft.

[0022] In some embodiments, a drive mechanism is further included, which controls the engagement sleeve to move toward the first axial position, the second axial position, or the third axial position.

[0023] In some embodiments, the internal combustion engine transmission assembly includes a torque damper disposed between the internal combustion engine and the clutch.

[0024] In some embodiments, the planetary gear set, the differential, and the synchronizer are arranged coaxially about the output shaft of the differential.

[0025] This utility model embodiment also provides a range extender for a hybrid power system of a vehicle, the range extender comprising:

[0026] According to any of the above-mentioned transmission mechanisms, and

[0027] An electric motor is connected to the motor transmission assembly of the transmission mechanism.

[0028] This utility model embodiment also provides a hybrid power system for a vehicle, comprising:

[0029] The range extender as described above, and

[0030] An internal combustion engine, wherein the internal combustion engine is connected to the internal combustion engine transmission assembly of the transmission mechanism of the range extender.

[0031] in,

[0032] When the clutch is engaged, the internal combustion engine transmission assembly is connected to the electric motor transmission assembly.

[0033] When the synchronizer fixes the gear ring to prevent it from rotating and the sun gear rotates, the planet carrier outputs a first-speed rotation.

[0034] When the synchronizer does not fix any rotating element of the planetary gear set, the wheel drive assembly is decoupled from the wheel;

[0035] When the synchronizer fixes the gear ring to the planet carrier and the sun gear rotates, the planet carrier outputs a second speed.

[0036] This utility model embodiment also provides a vehicle including the hybrid power system described above.

[0037] The hybrid power system, transmission mechanism, range extender, and vehicle provided by this utility model have the following advantages:

[0038] This invention controls the transmission connection between the internal combustion engine transmission assembly and the electric motor transmission assembly via a clutch. The electric motor transmission assembly and the wheel transmission assembly are connected via a planetary gear set. A synchronizer controls the transmission connection between the wheel transmission assembly and the wheels. Therefore, by controlling the different engagement states of the clutch and synchronizer, various power transmission requirements can be met, and the switching between different transmission modes is smooth, which can improve the user's driving experience. Attached Figure Description

[0039] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of a hybrid power system provided in an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the engaging toothed sleeve of the synchronizer in the first axial position according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the engaging toothed sleeve of the synchronizer in the second axial position according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the engaging toothed sleeve of the synchronizer in the third axial position according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of a hybrid power system provided in another embodiment of the present invention.

[0045] Figure label:

[0046] 10 Internal Combustion Engine Transmission Assembly 31PC Planetary Carrier

[0047] 11 Second output shaft 32 Differential

[0048] 12 Torque damper 321 Differential housing

[0049] 20 Motor drive assembly 322 Differential output shaft

[0050] 21 First input shaft 33 Synchronizer

[0051] 22 First output shaft 331 Engaging gear sleeve

[0052] 23 Reduction Gear Set 332 First Engaging Gear Ring

[0053] 231 Planetary carrier of reduction gear set; 333 Second engagement gear ring

[0054] 232 Gear ring of reduction gear set; 34 Fixed housing

[0055] 30 Wheel drive assembly 35 First gear

[0056] 31 Planetary gear set 36 Second gear

[0057] 31SG Sun Gear 40 Clutch

[0058] 31PG planetary gear 50 internal combustion engine

[0059] 31RG Gear Ring 60 Motor

[0060] 70 wheels Detailed Implementation

[0061] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many 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 will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0062] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0063] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0064] To address the problems in the prior art, this utility model provides a transmission mechanism for a hybrid power system in a vehicle. The transmission mechanism of the hybrid power system includes an internal combustion engine transmission assembly for driving connection with an internal combustion engine; an electric motor transmission assembly for driving connection with an electric motor; a wheel transmission assembly for driving connection with a wheel; and a clutch, disposed on the internal combustion engine transmission assembly or the electric motor transmission assembly, for driving connection or decoupling of the internal combustion engine transmission assembly and the electric motor transmission assembly; the wheel transmission assembly includes a planetary gear set, a differential, and a synchronizer; the planetary gear set includes a sun gear, a planet carrier, and a ring gear; the sun gear is drivingly connected to the electric motor transmission assembly; the planet carrier is connected to the housing of the differential; and the output shaft of the differential is connected to the wheel; when the synchronizer fixes the ring gear and the sun gear rotates, the planet carrier outputs a first-speed output; when the synchronizer does not fix any rotating element of the planetary gear set, the wheel transmission assembly is decoupled from the wheel; and when the synchronizer fixes the ring gear to the planet carrier and the sun gear rotates, the planet carrier outputs a second-speed output.

[0065] This invention achieves various transmission requirements by controlling different engagement states of the clutch and synchronizer, and the switching between different transmission modes is smooth, which can improve the user's driving experience.

[0066] The transmission mechanism for a hybrid power system for vehicles provided by this utility model will be explained in detail below with reference to specific embodiments.

[0067] Figure 1 The present invention illustrates a transmission mechanism for a hybrid power system for a vehicle according to an embodiment of the present invention, including an internal combustion engine transmission assembly 10, an electric motor transmission assembly 20, a wheel transmission assembly 30, and a clutch 40.

[0068] Specifically, the internal combustion engine transmission assembly 10 is used to drive the internal combustion engine 50; the electric motor transmission assembly 20 is used to drive the electric motor 60; the wheel transmission assembly 30 is used to drive the wheel 70; and the clutch 40 is disposed on the internal combustion engine transmission assembly 10 or the electric motor transmission assembly 20 to drive the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 to connect or decouple them.

[0069] The wheel drive assembly 30 includes a planetary gear set 31, a differential 32, and a synchronizer 33. The planetary gear set 31 includes a sun gear 31SG, a planet carrier 31PC, and a ring gear 31RG. The sun gear 31SG is connected to the motor drive assembly 20. The planet carrier 31PC is connected to the housing 321 of the differential 32. The output shaft 322 of the differential 32 is connected to the wheel 70. Figure 1As shown, the planetary gear set 31, the differential 32, and the synchronizer 33 are arranged coaxially about the output shaft 322 of the differential 32.

[0070] For further details, please refer to Figures 2 to 4 The transmission mechanism also includes a fixed housing 34. The synchronizer 33 includes a engagement sleeve 331, a first engagement gear ring 332, and a second engagement gear ring 333. The engagement sleeve 331 is disposed on the gear ring 31RG and is movably connected to the gear ring 31RG along the axial direction of the gear ring 31RG. The first engagement gear ring 332 is disposed on the fixed housing 34. The second engagement gear ring 333 is disposed on the planetary carrier 31PC.

[0071] like Figure 2 As shown, when the engaging sleeve 331 is in the first axial position, it engages and locks with the first engaging gear ring 332, meaning the gear ring 31RG is fixedly connected to the fixed housing 34. Since the fixed housing 34 is fixed in position on the vehicle, the gear ring 34RG is fixed and does not rotate. When the sun gear 31SG rotates, it drives the planetary gear 31PG and planet carrier 31PC to rotate, while the gear ring 31RG does not rotate. The speed output by the planet carrier 31PC is related to the transmission ratio between the sun gear 31SG and the planetary gear 31PG; this speed output by the planet carrier 31PC is called the first gear speed.

[0072] like Figure 3 As shown, when the engagement sleeve 331 is in the second axial position, it does not engage with the first engagement ring 332 or the second engagement ring 333. Since the synchronizer 33 does not fix any rotating element of the planetary gear set 31, that is, each rotating element in the planetary gear set 31 rotates freely, the planet carrier 31PC has no power output at this time, and therefore cannot output effective power to the differential 32. Consequently, the wheel transmission assembly 30 cannot output power to the wheel 70, and thus the wheel transmission assembly 30 is decoupled from the wheel 70.

[0073] like Figure 4 As shown, when the engaging sleeve 331 is in the third axial position, the engaging sleeve 331 engages and locks with the second engaging gear ring 333. That is, at this time, the gear ring 31RG is fixedly connected to the planetary carrier 31PC, and the planetary gear set 31 is locked. When the sun gear 31SG rotates, it synchronously drives the planetary carrier 31PC and the gear ring 31RG to rotate. The speed output by the planetary carrier 31PC is the speed of the sun gear 31SG. This speed output by the planetary carrier 31PC is called the second-gear speed. In this embodiment of the invention, the planetary gear set 31 can output two speeds, thus providing more speed options for vehicle operation and allowing the internal combustion engine 50 and the electric motor 60 to perform optimally.

[0074] When the control clutch 40 is engaged and the synchronizer 33 does not fix any rotating element of the planetary gear set 31, the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 are connected, and the wheel transmission assembly 30 is decoupled from the wheel 70. Furthermore, the internal combustion engine 50 can be used to drive the electric motor 60 to generate electricity, charging the vehicle battery and improving the vehicle's range; or the electric motor 60 can be used to start the internal combustion engine 50, improving its starting efficiency.

[0075] When the control clutch 40 is engaged, the synchronizer 33 fixes the gear ring 31RG without rotating, or the synchronizer 33 locks the planetary gear set 31, the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 are connected in transmission, and the wheel transmission assembly 30 is connected in transmission with the wheel 70. Furthermore, the internal combustion engine 50 can be used to drive the wheel 70 to rotate.

[0076] When the control clutch 40 is disengaged, the synchronizer 33 fixing ring 31RG does not rotate, or the synchronizer 33 locks the planetary gear set 31, the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 are disconnected, and the wheel transmission assembly 30 is connected to the wheel 70. Furthermore, the electric motor 60 can be used to drive the wheel 70 to rotate; or, during vehicle braking, the electric motor 60 can be used for energy recovery to charge the battery.

[0077] Therefore, by controlling the engagement and disengagement of the clutch 40, and by fixing the gear ring 31RG of the synchronizer 33 so that it does not rotate or by locking the planetary gear set 31, various transmission connection states of the internal combustion engine transmission assembly 10, the electric motor transmission assembly 20 and the wheel transmission assembly 30 can be realized, thereby realizing multiple transmission modes. Moreover, the switching between each transmission mode is smooth, which can improve the user's driving experience.

[0078] Specifically, the motor drive assembly 20 includes a first input shaft 21 and a first output shaft 22, and the wheel drive assembly 30 includes a second input shaft (not shown in the figure), a first gear 35, and a second gear 36. The first gear 35 is fixed on the first output shaft 22, the sun gear 31SG is fixed on the first end of the second input shaft, and the second gear 36 is fixed on the second end of the second input shaft. The first gear 35 and the second gear 36 are meshed together. When the internal combustion engine 50 or the motor 60 drives the first output shaft 22 to rotate, the first gear 35 rotates synchronously, and the rotational torque is then transmitted to the second input shaft and the sun gear 31SG through the second gear 36, thus realizing the transmission connection between the motor drive assembly 20 and the wheel drive assembly 30.

[0079] like Figure 1As shown, in some embodiments, the first input shaft 21 and the first output shaft 22 are connected by a reduction gear set 23, and the planetary carrier of the reduction gear set 23 is fixedly connected to the first output shaft 22. In this embodiment, the reduction gear set 23 can be a planetary reduction gear, which is used to reduce the speed of the motor 60 and increase the output torque. The planetary carrier 231 of the reduction gear set 23 is fixedly connected to the first output shaft 22, which means that the speed on the planetary carrier 231 of the reduction gear set 23 is the same as the speed of the first output shaft 22. In other embodiments, the motor transmission assembly 20 may only include the first output shaft 22 directly connected to the motor 60, without including the reduction gear set 23.

[0080] Furthermore, the internal combustion engine transmission assembly 10 includes a second output shaft 11, and a clutch 40 is disposed on either the first output shaft 22 or the second output shaft 11. When the clutch 40 is engaged, the first output shaft 22 and the second output shaft 11 are connected, thereby realizing the transmission connection between the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20.

[0081] Furthermore, the transmission mechanism also includes a drive mechanism (not shown in the figure), which controls the engagement sleeve 331 to move to a first axial position, a second axial position, or a third axial position, so as to achieve engagement and locking or disengagement of the engagement sleeve 331 with the first engagement ring 332, or engagement and locking or disengagement of the engagement sleeve 331 with the second engagement ring 333.

[0082] Furthermore, the internal combustion engine transmission assembly 10 includes a torsional damper 12, which is disposed between the internal combustion engine 50 and the clutch 40. The torsional damper 12, disposed between the internal combustion engine 50 and the clutch 40, serves to buffer and dampen vibrations, reducing vibrations during power transmission from the internal combustion engine 50 and ensuring smooth power transmission. The torsional damper 12 can be considered as part of the second output shaft 11 of the internal combustion engine transmission assembly 10.

[0083] Furthermore, such as Figure 5 As shown, another embodiment of this utility model also provides a transmission mechanism for a hybrid power system in a vehicle, and... Figure 1 Compared to the transmission mechanism shown, the transmission mechanism in this embodiment differs only in the partial structure of the motor transmission assembly 20 and the wheel transmission assembly 30; the rest are the same. Therefore, the specific structural configuration of the remaining components will not be described in detail here, but can be referred to the above description. Specifically, in Figure 1In this embodiment, the first input shaft 21 is fixedly connected to the sun gear of the reduction gear set 23, the gear ring of the reduction gear set 23 is fixed, and the first output shaft 22 is fixedly connected to the planetary carrier of the reduction gear set 23. In this embodiment, the motor transmission assembly 20 includes a first input shaft 21, a reduction gear set 23, and a first output shaft 22. The first input shaft 21 and the first output shaft 22 are connected via the reduction gear set 23. The first input shaft 21 is fixedly connected to the sun gear of the reduction gear set 23, the planetary carrier of the reduction gear set 23 is fixedly connected to the fixed housing 34, and the first output shaft 22 is fixedly connected to the gear ring 232 of the reduction gear set 23. The wheel transmission assembly 30 also includes a second input shaft (not shown) and a second gear 36. The sun gear 31SG is fixed to the first end of the second input shaft, and the second gear 36 is fixed to the second end of the second input shaft. The gear ring of the reduction gear set 23 and the second gear 36 are meshed together. In this embodiment, the reduction gear set 23 can be a planetary reduction gear, which is used to reduce the speed of the motor 60 and increase the output torque. The gear ring of the reduction gear set 23 is fixedly connected to the first output shaft 22, which means that the gear ring of the reduction gear set 23 and the first output shaft 22 rotate at the same speed.

[0084] This embodiment of the invention also provides a range extender for a vehicle's hybrid power system, including the transmission mechanism and motor 60 as described above, wherein the motor 60 is drive-connected to the motor transmission assembly 20. The range extender can generate electrical energy to charge the battery, thereby increasing the vehicle's range.

[0085] Furthermore, this embodiment of the invention also provides a hybrid power system for a vehicle, including a range extender and an internal combustion engine 50 as described above, wherein the internal combustion engine 50 is connected to the internal combustion engine transmission assembly 10 of the transmission mechanism of the range extender.

[0086] in,

[0087] When the clutch 40 is engaged, the internal combustion engine transmission assembly 10 is connected to the electric motor transmission assembly 20.

[0088] When the synchronizer 33 fixed gear ring 31RG does not rotate and the sun gear 311SG rotates, the planet carrier 311PC outputs the first speed.

[0089] When the synchronizer 33 does not fix any rotating element of the planetary gear set 31, the wheel transmission assembly 30 is decoupled from the wheel 70.

[0090] When synchronizer 33 fixes gear ring 31RG to planet carrier 31PC and sun gear 31SG rotates, planet carrier 31PC outputs second speed.

[0091] Based on the above introduction of the components in the hybrid power system, the following section combines... Figures 1 to 4The working modes of the hybrid power system provided in the embodiments of this utility model are described.

[0092] Charging mode: When clutch 40 is engaged, the engagement sleeve 331 of synchronizer 33 is neither engaged with the first engagement ring 332 nor with the second engagement ring 333. When internal combustion engine 50 drives motor 60 to rotate, motor 60 acts as a generator to generate electricity, which can charge the battery and increase the battery's stored capacity.

[0093] Motor drive mode: When the clutch 40 is disengaged, the engagement sleeve 331 of the synchronizer 33 engages and locks with the first engagement ring 332, and the ring 31RG is fixed and does not rotate; when the motor 60 is running, it drives the sun gear 31SG to rotate, and the planet carrier 31PC outputs the first speed.

[0094] When clutch 40 is disengaged, the engagement sleeve 331 of synchronizer 33 engages and locks with the second engagement ring 333, and planetary gear set 31 is locked; when motor 60 is running, it drives sun gear 31SG to rotate, and planet carrier 31PC outputs second speed.

[0095] Internal combustion engine drive mode: when clutch 40 is engaged, the engagement sleeve 331 of synchronizer 33 engages and locks with the first engagement ring 332, and the ring 31RG is fixed and does not rotate. When internal combustion engine 50 is running, it drives sun gear 31SG to rotate, and planet carrier 31PC outputs first gear speed.

[0096] When clutch 40 engages, the engagement sleeve 331 of synchronizer 33 engages and locks with the second engagement ring 333, and planetary gear set 31 is locked. When internal combustion engine 50 runs, it drives sun gear 31SG to rotate, and planet carrier 31PC outputs second speed.

[0097] Motor-start internal combustion engine mode: Clutch 40 engages, engagement sleeve 331 neither engages and locks with the first engagement gear ring 332 nor engages and locks with the second engagement gear ring 333, and motor 60 assists in starting internal combustion engine 50 when running.

[0098] Wheel decoupling mode: Synchronizer 33 engages with gear sleeve 331 without engaging and locking with first engagement gear ring 332, each rotating element of planetary gear set 31 rotates freely without power output, and wheel transmission assembly 30 is decoupled from wheel 70.

[0099] Energy recovery mode: When the clutch 40 is disengaged, the engagement sleeve 331 of the synchronizer 33 is fixed to the first engagement ring 332, or the engagement sleeve 331 of the synchronizer 33 is fixed to the second engagement ring 333. The motor 60 will generate a reverse induced current to recharge the battery. At the same time, the reverse electromotive force will also apply a reverse torque to the motor 60 and act on the wheel 70, thereby generating an electric braking force to slow down the vehicle.

[0100] It should be noted that, Figure 5 The transmission system shown and Figure 1 The transmission systems shown differ only in the structural differences between the motor drive assembly 20 and the wheel drive assembly 30; the rest are identical. Therefore... Figure 5 The working principle of the transmission system shown can be referred to the above description, and will not be repeated here.

[0101] This utility model embodiment also provides a vehicle including the hybrid power system described above. The vehicle provided by this utility model embodiment achieves all the technical effects of the above-described hybrid power system, which will not be repeated here.

[0102] Furthermore, the range extender or vehicle including the above-mentioned transmission mechanism has a controller for controlling the axial position of the drive mechanism driving the engagement sleeve 331 under different transmission demand modes, so as to realize the output of the wheel 70 at first speed, second speed or no power output.

[0103] The hybrid power system, transmission mechanism, range extender, and vehicle provided by this utility model have the following advantages:

[0104] This invention controls the transmission connection or decoupling of the internal combustion engine drive assembly and the electric motor drive assembly via a clutch; the electric motor drive assembly and the wheel drive assembly are connected via a planetary gear set; and the wheel drive assembly is controlled to connect or decouple from the wheel drive assembly via a synchronizer. Therefore, by controlling the working states of the clutch and synchronizer, various transmission requirements can be met. The hybrid system can achieve charging mode, internal combustion engine drive mode, electric motor drive mode, electric motor-started internal combustion engine mode, energy recovery mode, and wheel decoupling mode, etc. The switching between these transmission modes is smooth, improving the user's driving experience.

[0105] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A transmission mechanism for a hybrid power system in a vehicle, characterized in that, include: An internal combustion engine transmission assembly, wherein the internal combustion engine transmission assembly is used for transmission connection with an internal combustion engine; A motor drive assembly, the motor drive assembly being used for connection with a motor drive; A wheel drive assembly for connection to a wheel drive; A clutch is provided on the internal combustion engine transmission assembly or the electric motor transmission assembly, and is used to connect or decouple the internal combustion engine transmission assembly and the electric motor transmission assembly in a transmission manner. The wheel drive assembly includes a planetary gear set, a differential, and a synchronizer. The planetary gear set includes a sun gear, a planet carrier, and a ring gear. The sun gear is connected to the motor drive assembly. The planet carrier is connected to the housing of the differential. The output shaft of the differential is connected to the wheel. When the synchronizer fixes the gear ring to prevent it from rotating and the sun gear rotates, the planet carrier outputs a first-speed rotation. When the synchronizer does not fix any rotating element of the planetary gear set, the wheel drive assembly is decoupled from the wheel; When the synchronizer fixes the gear ring to the planet carrier and the sun gear rotates, the planet carrier outputs a second speed.

2. The transmission mechanism according to claim 1, characterized in that, It also includes a fixed housing. The synchronizer includes a engagement gear sleeve, a first engagement gear ring, and a second engagement gear ring. The engagement gear sleeve is disposed on the gear ring and is movably connected to the gear ring along the axial direction of the gear ring. The first engagement gear ring is disposed on the fixed housing. The second engagement gear ring is disposed on the planetary carrier. When the engagement sleeve is in the first axial position, the engagement sleeve engages with and locks with the first engagement ring; When the engagement sleeve is in the second axial position, the engagement sleeve does not engage with the first engagement tooth ring, nor with the second engagement tooth ring; When the engagement sleeve is in the third axial position, the engagement sleeve engages with and locks with the second engagement ring.

3. The transmission mechanism according to claim 2, characterized in that, The motor transmission assembly includes a first input shaft and a first output shaft, and the wheel transmission assembly further includes a first gear, a second input shaft, and a second gear; the first gear is fixed on the first output shaft, the sun gear is fixed on the first end of the second input shaft, the second gear is fixed on the second end of the second input shaft, and the first gear and the second gear are meshed together.

4. The transmission mechanism according to claim 3, characterized in that, The first input shaft and the first output shaft are connected by a reduction gear set, and the planetary carrier of the reduction gear set is fixedly connected to the first output shaft.

5. The transmission mechanism according to claim 2, characterized in that, The motor transmission assembly includes a first input shaft, a reduction gear set, and a first output shaft. The first input shaft and the first output shaft are connected by the reduction gear set. The planetary carrier of the reduction gear set is fixedly connected to the fixed housing. The first output shaft is fixedly connected to the gear ring of the reduction gear set. The wheel transmission assembly also includes a second input shaft and a second gear. The sun gear is fixed to the first end of the second input shaft, and the second gear is fixed to the second end of the second input shaft. The gear ring of the reduction gear set meshes with the second gear.

6. The transmission mechanism according to claim 3, characterized in that, The internal combustion engine transmission assembly includes a second output shaft, and the clutch is disposed on the first output shaft or the second output shaft.

7. The transmission mechanism according to claim 2, characterized in that, It also includes a drive mechanism that controls the engagement sleeve to move toward the first axial position, the second axial position, or the third axial position.

8. The transmission mechanism according to claim 1, characterized in that, The internal combustion engine transmission assembly includes a torque damper disposed between the internal combustion engine and the clutch.

9. The transmission mechanism according to claim 1, characterized in that, The planetary gear set, the differential, and the synchronizer are arranged coaxially about the output shaft of the differential.

10. A range extender for a hybrid power system in a vehicle, characterized in that, The range extender includes: The transmission mechanism according to any one of claims 1 to 9, and An electric motor is connected to the motor transmission assembly of the transmission mechanism.

11. A hybrid power system for a vehicle, characterized in that, include: The range extender as described in claim 10, and An internal combustion engine, wherein the internal combustion engine is connected to the internal combustion engine transmission assembly of the transmission mechanism of the range extender. in, When the clutch is engaged, the internal combustion engine transmission assembly is connected to the electric motor transmission assembly. When the synchronizer fixes the gear ring to prevent it from rotating and the sun gear rotates, the planet carrier outputs a first-speed rotation. When the synchronizer does not fix any rotating element of the planetary gear set, the wheel drive assembly is decoupled from the wheel; When the synchronizer fixes the gear ring to the planet carrier and the sun gear rotates, the planet carrier outputs a second speed.

12. A vehicle, characterized in that, Including the hybrid power system as described in claim 11.

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