Vehicle and driving system thereof

Abstract

The utility model relates to a vehicle and a driving system thereof. The driving system comprises a motor, an internal combustion engine, a differential mechanism and an intermediate shaft, the middle shaft is sleeved with the hollow shaft; the bistable electromagnetic clutch is used for connecting the intermediate shaft with an output shaft or a hollow shaft of the internal combustion engine; an output shaft of the motor is connected with the intermediate shaft through the first transmission mechanism; the hollow shaft is in transmission connection with the differential mechanism through the second transmission mechanism; the driving system comprises the following two working modes which can be switched mutually: a motor driving mode and a range extending mode. The utility model provides a vehicle and a driving system thereof, provides a motor driving mode and a range extending mode, can effectively improve the endurance mileage of the vehicle, and improves the user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a vehicle and a drive system thereof. Background Art

[0002] As global attention to environmental protection and sustainable development continues to grow, new energy vehicles are becoming an increasingly important development direction for the automotive industry. As a core technology, new energy vehicle drive systems have a profound background.

[0003] Currently, existing drive systems in the new energy vehicle sector are relatively complex. Their overall structure comprises numerous components, and the coordination mechanisms between these components are complex. A key issue is that existing new energy vehicle drive systems generally lack a range-extending mode. This mode is crucial for improving the long-distance driving and range of new energy vehicles. Without this mode, new energy vehicles are significantly limited in range, leading to range anxiety among consumers on long-distance trips. Once the vehicle battery is depleted and there is no other effective way to replenish energy, the vehicle will be unable to continue driving, causing significant inconvenience to users.

[0004] Compared to traditional fuel-powered vehicles, new energy vehicles (NEVs) should offer significant advantages in energy efficiency and environmental friendliness. However, their practical application is limited by the complexity of their drive systems and the lack of a range-extending mode. Simplifying drive system structures and introducing effective range-extending modes will be key areas of research and development for NEV technology in the future. Utility Model Content

[0005] In response to the above-mentioned problems in the prior art, the present invention proposes a vehicle and a drive system thereof, which provide a motor drive mode and an extended-range mode, and can effectively increase the vehicle's cruising range and enhance the user experience.

[0006] Specifically, the present invention proposes a drive system including a motor, an internal combustion engine, and a differential, and further including:

[0007] intermediate shaft;

[0008] A hollow shaft, sleeved outside the intermediate shaft;

[0009] a bistable electromagnetic clutch, used to connect the intermediate shaft to the output shaft of the internal combustion engine or the hollow shaft;

[0010] a first transmission mechanism, wherein the output shaft of the motor is connected to the intermediate shaft via the first transmission mechanism;

[0011] a second transmission mechanism, wherein the hollow shaft is drivingly connected to the differential via the second transmission mechanism;

[0012] The drive system includes the following two mutually switchable working modes:

[0013] In the motor drive mode, the output shaft of the motor transmits torque to the intermediate shaft through the first transmission mechanism, and transmits the torque to the hollow shaft through the bistable electromagnetic clutch. The hollow shaft transmits torque to the differential through the second transmission mechanism.

[0014] In the range-extending mode, the output shaft of the internal combustion engine transmits torque to the intermediate shaft through the bistable electromagnetic clutch, and the intermediate shaft transmits torque to the output shaft of the motor through the first transmission mechanism.

[0015] According to one embodiment of the present invention, the bistable electromagnetic clutch includes a first armature, a second armature, and a gear sleeve, wherein the gear sleeve is disposed between the first armature and the second armature, the first armature is connected to the output shaft of the internal combustion engine, the second armature is connected to the hollow shaft, and the gear sleeve is rotationally fixed to the intermediate shaft and is movable along the axial direction of the intermediate shaft;

[0016] In the motor drive mode, the second armature is energized, the gear sleeve moves toward and engages with the second armature, and the intermediate shaft transmits torque to the hollow shaft through the bistable electromagnetic clutch;

[0017] In the range-extending mode, the first armature is energized, the gear sleeve moves toward and engages with the first armature, and the output shaft of the internal combustion engine transmits torque to the intermediate shaft through the bistable electromagnetic clutch.

[0018] According to one embodiment of the present invention, the first transmission mechanism includes a gear set, the gear set includes a first gear and a second gear meshing with each other, the first gear is arranged on the output shaft of the motor, and the second gear is engaged with the intermediate shaft.

[0019] According to one embodiment of the present invention, the output shaft of the motor is not coaxial with the output shaft of the internal combustion engine.

[0020] According to an embodiment of the present invention, the first transmission mechanism includes a planetary gear set, and the output shaft of the motor transmits torque to the intermediate shaft through the planetary gear set.

[0021] According to one embodiment of the present invention, the output shaft of the motor is coaxial with the intermediate shaft.

[0022] According to one embodiment of the present invention, the second transmission mechanism includes a driving gear, a first driven gear and a second driven gear, the driving gear and the first driven gear are meshed, the first driven gear and the second driven gear are fixed by a connecting shaft, the hollow shaft transmits torque to the first driven gear through the driving gear, and the second driven gear is used to drive the differential to operate.

[0023] According to one embodiment of the present invention, the drive system further includes an energy storage device connected to the motor, and in the extended-range mode, the energy generated by the motor is stored in the energy storage device.

[0024] The utility model also provides a vehicle, comprising the aforementioned drive system.

[0025] The utility model provides a vehicle and a drive system thereof, which provide two operating modes through a bistable electromagnetic clutch, a first transmission mechanism and a second transmission mechanism. The range-extending mode can effectively increase the cruising range and enhance the user experience.

[0026] It should be understood that the above general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and, together with this specification, serve to explain the principles of the present invention. In the accompanying drawings:

[0028] Figure 1 The figure shows a schematic structural diagram of a driving system according to an embodiment of the present invention.

[0029] Figure 2 A schematic structural diagram of a drive system according to another embodiment of the present invention is shown.

[0030] The above drawings include the following reference numerals:

[0031] Drive system 100

[0032] Motors 101

[0033] Internal Combustion Engine 102

[0034] Differential 103

[0035] Drive shaft 104

[0036] Intermediate shaft 105

[0037] Hollow shaft 106

[0038] First transmission mechanism 108

[0039] Second transmission mechanism 109

[0040] Bistable electromagnetic clutch 110

[0041] First armature 1101

[0042] Gear sleeve 1102

[0043] Second armature 1103

[0044] Output shaft 112 (of the motor)

[0045] Output shaft 113 (of the internal combustion engine)

[0046] First gear 114

[0047] Second gear 115

[0048] Driving gear 116

[0049] First driven gear 117

[0050] Second driven gear 118

[0051] Torsional vibration damper 119 DETAILED DESCRIPTION

[0052] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0056] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0059] Figure 1 The following is a schematic diagram of the structure of a drive system according to an embodiment of the present invention. As shown, the present invention provides a drive system 100, which primarily includes a motor 101, an internal combustion engine 102, and a differential 103. The differential 103 is mounted on a wheel drive shaft 104. The differential 103 transmits the power it receives to the drive shaft 104, thereby driving the wheels mounted at the ends of the drive shaft 104. The drive system 100 also includes an intermediate shaft 105, a hollow shaft 106, a bistable electromagnetic clutch 110, a first transmission mechanism 108, and a second transmission mechanism 109.

[0060] The hollow shaft 106 is sleeved on the intermediate shaft 105 , and the two cooperate with each other to realize power transmission in the system.

[0061] The connection between the internal combustion engine 102 and the intermediate shaft 105 and the hollow shaft 106 is achieved through a bistable electromagnetic clutch 110. The bistable electromagnetic clutch 110 transmits or cuts off power, so that the intermediate shaft 105 can be selectively connected to the output shaft 113 of the internal combustion engine 102 or the hollow shaft 106.

[0062] The first transmission mechanism 108 establishes a connection between the motor 101 and the intermediate shaft 105. The output shaft 112 of the motor 101 is connected to the intermediate shaft 105 through the first transmission mechanism 108, thereby transmitting power from the motor 101 to the intermediate shaft 105 or from the intermediate shaft 105 to the motor 101.

[0063] The second transmission mechanism 109 establishes a transmission connection between the hollow shaft 106 and the differential 103 to transmit power to the wheels to drive the vehicle.

[0064] The drive system 100 has two switchable working modes, each of which has its own unique power transmission path and working principle.

[0065] The first mode is motor-driven. In this mode, the output shaft 112 of motor 101 transmits torque to intermediate shaft 105 via first transmission mechanism 108. This torque is then transferred to hollow shaft 106 via bistable electromagnetic clutch 110. Finally, hollow shaft 106 transmits torque to differential 103 via second transmission mechanism 109, thereby driving the vehicle forward. In this mode, the vehicle is primarily powered by motor 101, making it suitable for low-speed urban driving and offering quiet and efficient operation.

[0066] The second mode is the range-extending mode. In this mode, the output shaft 113 of the internal combustion engine 102 transmits torque to the intermediate shaft 105 through the bistable electromagnetic clutch 110, and the intermediate shaft 105 transmits torque to the output shaft 112 of the motor 101 through the first transmission mechanism 108. The output shaft 112 of the motor 101 drives the rotating shaft inside the housing of the motor 101 in the opposite direction. In this case, the motor 101 operates as a generator to provide electrical energy or current. In this mode, the internal combustion engine 102 does not directly drive the vehicle, but generates electricity for the motor 101. The range-extending mode can extend the vehicle's cruising range and is particularly suitable for situations where the battery is low but the vehicle needs to continue driving.

[0067] The drive system 100 disclosed in the present invention can serve as an auxiliary drive system for a vehicle, particularly an auxiliary drive system located at the front axle of the vehicle. In this case, the vehicle also includes a main drive system located at the rear axle. As will be readily understood, the drive system 100, when capable of providing an extended-range mode and serving as an auxiliary drive, has the following important functions:

[0068] 1. Enhanced power performance

[0069] Improved acceleration: When the vehicle needs to accelerate quickly, the auxiliary drive can work in conjunction with the main drive system to provide additional power output, significantly improving the vehicle's acceleration performance. This is very helpful in situations such as overtaking and merging onto highways. Increased climbing ability: When facing steep hills or heavy loads, the auxiliary drive can provide additional torque to ensure that the vehicle can climb smoothly without power loss.

[0070] 2. Expanding driving range

[0071] Extending the range in pure electric mode: For pure electric vehicles, the extended range mode can be activated when the battery power is low, providing continuous power to the vehicle, thereby extending the range in pure electric mode.

[0072] In some examples, the bistable electromagnetic clutch 110 includes a first armature 1101, a gear sleeve 1102, and a second armature 1103. The gear sleeve 1102 is disposed between the first armature 1101 and the second armature 1103. The first armature 1101 is connected to the output shaft 113 of the internal combustion engine 102, and the second armature 1103 is connected to the hollow shaft 106. The gear sleeve 1102 is rotationally fixed to the intermediate shaft 105 and is movable along the axial direction of the intermediate shaft 105. The bistable electromagnetic clutch 110 is primarily based on electromagnetic principles to achieve power transmission and disconnection. Its bistable characteristic means that the clutch has two stable operating states, which can be switched between these two states under the action of electromagnetic force. Specifically, after the bistable electromagnetic clutch 110 is powered on, the gear sleeve 1102 can move to the left to engage with the first armature 1101, or move to the right to engage with the second armature 1103.

[0073] In motor-driven mode, power is supplied to the second armature 1103. Under the action of electromagnetic force, the gear sleeve 1103 moves toward the second armature 1103, coupling the two. Intermediate shaft 105 transmits torque to hollow shaft 106 via bistable electromagnetic clutch 110. In this mode, the power transmission path is: motor 101 - intermediate shaft 105 - hollow shaft 106 - differential 103.

[0074] In extended-range mode, the first armature 1101 is energized. Under the action of electromagnetic force, the gear sleeve 1103 moves toward the first armature 1101, coupling the two. The output shaft 113 of the internal combustion engine 102 transmits torque to the intermediate shaft 105 via the bistable electromagnetic clutch 110. In this mode, the power transmission path is: internal combustion engine 102 - intermediate shaft 105 - motor 101.

[0075] In some examples, reference Figure 1The first transmission mechanism 108 includes a gear set. The gear set includes a first gear 114 and a second gear 115 that mesh with each other. The first gear 114 is arranged on the output shaft 112 of the motor 101, and the second gear 115 is coupled to the intermediate shaft 105. In motor-driven mode, the output shaft 112 drives the first gear 114 to rotate. When the first gear 114 rotates, the meshing of the two transmits power to the second gear 115, which in turn drives the intermediate shaft 105 to rotate. This design allows the power of the motor 101 to be smoothly and efficiently transmitted to the intermediate shaft 105 through the gear set, providing power support for the operation of the vehicle. In extended-range mode, the intermediate shaft 105 drives the second gear 115 to rotate, which in turn transmits power to the first gear 114 through meshing with the first gear 114, which in turn drives the output shaft 112 of the motor 101 to rotate, causing the motor 101 to operate as a generator, thereby increasing the vehicle's range. With this structural arrangement of the first transmission mechanism 108, the output shaft 112 of the motor 101 is not coaxial with the output shaft 113 of the internal combustion engine 102. In terms of the overall design of the vehicle, the non-coaxial arrangement allows the motor 101 and the internal combustion engine 102 to be more flexibly arranged inside the vehicle, leaving more space for other components such as the battery pack, electronic control system, cooling system, etc., optimizing the vehicle's space utilization and making the vehicle's internal layout more reasonable. Furthermore, the non-coaxial design makes the structures of the motor 101 and the internal combustion engine 102 relatively independent, making maintenance and repair more convenient. Technicians can inspect, maintain, and repair the motor 101 and the internal combustion engine 102 separately, reducing the difficulty and cost of maintenance and repair.

[0076] Figure 2 The schematic diagram of the structure of the drive system of another embodiment of the present invention is shown. Figure 1Aside from the specific structural differences between the first transmission mechanism 108 and the first transmission mechanism 108, the other structures are identical. Specifically, the first transmission mechanism 108 includes a planetary gear set, through which the output shaft 112 of the motor 101 transmits torque to the intermediate shaft 105. The planetary gear set transmits torque to the intermediate shaft 105 smoothly and efficiently. Its unique structure and operation ensure optimal torque distribution and transmission. This transmission process not only ensures smooth power output but also allows for flexible adjustment of torque magnitude and direction according to demand under different operating conditions, effectively ensuring stable driving and excellent performance of the vehicle and enabling the vehicle to adapt to various complex road conditions. In this structural arrangement of the first transmission mechanism 108, the output shaft 112 of the motor 101 is coaxial with the output shaft 113 of the internal combustion engine 102. This coaxial design simplifies the transmission structure, reduces the number of components, and thus reduces the probability of failure. Furthermore, it effectively shortens the power transmission path, reduces energy loss, and makes power transmission more efficient and direct, thereby improving the vehicle's energy efficiency. Furthermore, coaxiality can enhance the stability of the system, reduce vibration and noise, and provide the driver with a more comfortable driving experience.

[0077] In some examples, the second transmission mechanism 109 includes a driving gear 116, a first driven gear 117, and a second driven gear 118. The driving gear 116 is tightly meshed with the first driven gear 117, while the first driven gear 117 and the second driven gear 118 are securely fixed together via a connecting shaft. The internal combustion engine 102 or the electric motor 101 transmits torque from the driving gear 116 to the first driven gear 117 via the central shaft, and then to the differential 103. During this process, the second driven gear 118 is responsible for driving the differential 103 to operate, thereby achieving reasonable power distribution and transmission, ensuring stable operation of the entire transmission system.

[0078] In some examples, the drive system 100 further includes an energy storage device (not shown) connected to the motor 101. In the extended-range mode, the energy generated by the motor 101 is stored in the energy storage device. The energy storage device can effectively collect and store the electrical energy generated by the motor 101. This allows the vehicle to flexibly call upon this stored energy under different operating conditions, providing stable power support for the vehicle's continuous operation, further improving the vehicle's energy efficiency and endurance.

[0079] In some examples, a torsional vibration damper 119 is provided on the output shaft 113 of the internal combustion engine 102. During operation, the internal combustion engine 102 generates periodic torsional vibrations on the output shaft 113 due to factors such as combustion explosions within the cylinders and the reciprocating motion of the pistons. The torsional vibration damper 119 absorbs this vibration energy through its elasticity and damping properties, reducing the vibration amplitude of the output shaft 113 and ensuring smoother operation. It also acts as a buffer, reducing damage to the transmission system caused by impacts and extending the service life of components.

[0080] The present invention also provides a vehicle, which includes the aforementioned drive system 100 .

[0081] This utility model provides a vehicle and its drive system, offering two drive modes. The extended-range mode significantly improves the vehicle's range. In extended-range mode, the internal combustion engine drives the electric motor to generate electricity, providing sufficient power for continued driving, effectively alleviating users' range anxiety. Furthermore, this drive system facilitates all-wheel drive, precisely distributing power to the front and rear wheels, ensuring excellent traction and stability in all road conditions.

[0082] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A drive system comprising a motor, an internal combustion engine and a differential, characterized in that: Also includes: intermediate shaft; A hollow shaft, sleeved outside the intermediate shaft; a bistable electromagnetic clutch, used to connect the intermediate shaft to the output shaft of the internal combustion engine or the hollow shaft; a first transmission mechanism, wherein the output shaft of the motor is connected to the intermediate shaft via the first transmission mechanism; a second transmission mechanism, wherein the hollow shaft is drivingly connected to the differential via the second transmission mechanism; The drive system includes the following two mutually switchable working modes: In the motor drive mode, the output shaft of the motor transmits torque to the intermediate shaft through the first transmission mechanism, and transmits the torque to the hollow shaft through the bistable electromagnetic clutch. The hollow shaft transmits torque to the differential through the second transmission mechanism. In the range-extending mode, the output shaft of the internal combustion engine transmits torque to the intermediate shaft through the bistable electromagnetic clutch, and the intermediate shaft transmits torque to the output shaft of the motor through the first transmission mechanism.

2. The drive system according to claim 1, wherein: The bistable electromagnetic clutch includes a first armature, a second armature, and a gear sleeve, wherein the gear sleeve is disposed between the first armature and the second armature, the first armature being connected to the output shaft of the internal combustion engine, the second armature being connected to the hollow shaft, and the gear sleeve being rotationally fixed to the intermediate shaft and movable along the axial direction of the intermediate shaft; In the motor drive mode, the second armature is energized, the gear sleeve moves toward and engages with the second armature, and the intermediate shaft transmits torque to the hollow shaft through the bistable electromagnetic clutch; In the range-extending mode, the first armature is energized, the gear sleeve moves toward and engages with the first armature, and the output shaft of the internal combustion engine transmits torque to the intermediate shaft through the bistable electromagnetic clutch.

3. The drive system according to claim 1, wherein: The first transmission mechanism includes a gear set including a first gear and a second gear meshing with each other, the first gear is arranged on the output shaft of the motor, and the second gear is engaged with the intermediate shaft.

4. The drive system according to claim 2, wherein: The output shaft of the electric motor is not coaxial with the output shaft of the internal combustion engine.

5. The drive system according to claim 1, wherein: The first transmission mechanism includes a planetary gear set, and the output shaft of the motor transmits torque to the intermediate shaft through the planetary gear set.

6. The drive system according to claim 5, wherein: The output shaft of the motor is coaxial with the intermediate shaft.

7. The drive system according to claim 1, wherein: The second transmission mechanism includes a driving gear, a first driven gear and a second driven gear. The driving gear and the first driven gear are meshed. The first driven gear and the second driven gear are fixed by a connecting shaft. The hollow shaft transmits torque to the first driven gear through the driving gear. The second driven gear is used to drive the differential.

8. The drive system according to claim 1, wherein: It also includes an energy storage connected to the motor. In the extended-range mode, the energy generated by the motor is stored in the energy storage.

9. A vehicle comprising the drive system according to any one of claims 1 to 8.

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