Vehicle hybrid drive system and vehicle

Abstract

The utility model provides a vehicle hybrid drive system and a vehicle. The vehicle hybrid driving system comprises an engine, a planetary gear mechanism, a first motor, a first clutch, a first transmission mechanism, a second clutch and a second motor. The engine is provided with an engine output shaft. The first motor is provided with a first motor output shaft, and the first motor output shaft is fixedly connected with the sun gear; the first clutch is arranged on the direct drive shaft, and the first clutch is configured to control the direct drive shaft to be combined with and separated from the gear ring; the gear ring is in transmission connection with a vehicle differential through a first transmission mechanism; the second clutch is arranged on the first transmission mechanism, and the second clutch is configured to control the combination and separation of the first transmission mechanism so as to control the transmission connection between the gear ring and the differential mechanism; the second motor is in transmission connection with the differential through a second transmission mechanism. According to the vehicle hybrid driving system and the vehicle, the efficiency of the hybrid driving system can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to vehicle hybrid drive systems and vehicles. Background Technology

[0002] Hybrid drive systems for vehicles in related technologies can generally be divided into two main types: power-split type and series-parallel type. However, the power-split type has the characteristic of high system efficiency at low speeds, but low system efficiency at high speeds; the series-parallel type has the characteristic of high system efficiency at high speeds, but low system efficiency at low speeds. Utility Model Content

[0003] To at least partially solve the above-mentioned problems, according to a first aspect of this application, embodiments of this application provide a vehicle hybrid drive system, including an engine, a planetary gear mechanism, a first motor, a first clutch, a first transmission mechanism, a second clutch, and a second motor. The engine has an engine output shaft; the planetary gear mechanism includes a ring gear, a planet carrier, planet gears, and a sun gear, the planet gears being rotatably mounted on the planet carrier and meshing with both the ring gear and the sun gear; the engine output shaft is fixedly connected to the planet carrier via a direct drive shaft; the first motor has a first motor output shaft, which is fixedly connected to the sun gear; the first clutch is mounted on the direct drive shaft and configured to control the engagement and disengagement of the direct drive shaft and the ring gear; the ring gear is drive-connected to the vehicle's differential via the first transmission mechanism; the second clutch is mounted on the first transmission mechanism and configured to control the engagement and disengagement of the first transmission mechanism to control the drive connection between the ring gear and the differential; the second motor is drive-connected to the differential via the second transmission mechanism.

[0004] In some embodiments, the first transmission mechanism includes a first gear, a second gear, a third gear, and a fourth gear. The first gear is concentrically arranged and fixedly connected to the gear ring; the second gear meshes with the first gear; the third gear is fixedly connected to the second gear through a first intermediate shaft; the fourth gear meshes with the third gear and is fixedly connected to the differential.

[0005] In some embodiments, the first intermediate shaft includes a first half-shaft and a second half-shaft arranged coaxially, and the driving plate and driven plate of the second clutch are respectively disposed on the first half-shaft and the second half-shaft to control the engagement and disengagement of the first half-shaft and the second half-shaft.

[0006] In some embodiments, a first gear is sleeved on a direct drive shaft, and a first clutch is disposed between the direct drive shaft and the first gear to control the engagement and disengagement of the direct drive shaft and the first gear.

[0007] In some embodiments, the second transmission mechanism includes a fifth gear and a sixth gear. The fifth gear is fixedly connected to the output shaft of the second motor of the second motor. The sixth gear meshes with the fifth gear and is fixedly connected to the third gear through a second intermediate shaft. The second intermediate shaft is coaxially arranged with the first intermediate shaft.

[0008] In some embodiments, the vehicle hybrid drive system further includes a shock absorber disposed between the engine output shaft and the direct drive shaft.

[0009] In some embodiments, the planetary gear mechanism further includes a gear ring holder, the gear ring being fixedly connected to the gear ring holder, and the first gear being fixedly mounted on the gear ring holder; the outer end of the first clutch is mounted on the first gear, and the inner end of the first clutch is mounted on the direct drive shaft.

[0010] According to a second aspect of this application, embodiments of this application also provide a vehicle, the vehicle including the vehicle hybrid drive system provided in any embodiment of the first aspect of this application.

[0011] The vehicle hybrid drive system and vehicle provided in the embodiments of this application can achieve both power split type and series-parallel type by controlling the working state of the first clutch and the second clutch. This allows the vehicle to have the advantages of power split in the low-speed range and the advantages of series-parallel connection in the high-speed range, thereby improving the efficiency of the hybrid drive system. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a vehicle hybrid drive system provided in an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of the planetary gear mechanism provided in the embodiments of this application.

[0015] The attached figures are labeled as follows:

[0016] 1. Engine; 2. Engine output shaft; 3. Shock absorber; 4. Direct drive shaft; 5. Second motor; 6. Fifth gear; 7. First clutch; 8. First gear; 9. Planetary gear mechanism; 10. First motor output shaft; 11. First motor; 12. Sixth gear; 13. Differential; 14. Fourth gear; 15. Second intermediate shaft; 16. Third gear; 17. Second clutch; 18. Second gear; 91. Ring gear carrier; 92. Planetary carrier; 93. Ring gear; 94. Planetary gears; 95. Sun gear.

[0017] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0018] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0019] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0020] like Figure 1 and Figure 2As shown, according to the first aspect of this application, an embodiment of this application provides a vehicle hybrid drive system. The vehicle hybrid drive system includes an engine 1, a planetary gear mechanism 9, a first motor 11, a first clutch 7, a first transmission mechanism, a second clutch 17, and a second motor 5. The engine 1 has an engine output shaft 2. The planetary gear mechanism 9 includes a ring gear 93, a planet carrier 92, planet gears 94, and a sun gear 95. The planet gears 94 are rotatably mounted on the planet carrier 92 and mesh with both the ring gear 93 and the sun gear 95. The engine output shaft 2 and the planet carrier 92 are connected via a direct drive shaft 4. Fixed connection; the first motor 11 has a first motor output shaft 10, which is fixedly connected to the sun gear 95; the first clutch 7 is disposed on the direct drive shaft 4 and is configured to control the engagement and disengagement of the direct drive shaft 4 and the gear ring 93; the gear ring 93 is connected to the vehicle differential 13 via a first transmission mechanism; the second clutch 17 is disposed on the first transmission mechanism and is configured to control the engagement and disengagement of the first transmission mechanism to control the transmission connection between the gear ring 93 and the differential 13; the second motor 5 is connected to the differential 13 via a second transmission mechanism.

[0021] The vehicle hybrid drive system and vehicle provided in the embodiments of this application can achieve both power-split and series-parallel operation by controlling the working states of the first clutch 7 and the second clutch 17. This allows the vehicle to have the advantages of power-split operation in the low-speed range and the advantages of series-parallel operation in the high-speed range, thereby improving the efficiency of the hybrid drive system. Specifically, when the first clutch 7 is engaged and the second clutch 17 is disengaged, the engine 1 can drive the first motor 11 to generate electricity. The electrical energy generated by the first motor 11 can be used by the second motor 5 to output power to the wheels. This is a series-parallel drive mode. When the first clutch 7 is engaged and the second clutch 17 is engaged, part of the power generated by the engine 1 is transmitted to the first motor 11 to generate electricity through the sun gear 95 of the planetary gear mechanism 9, and the other part of the power is transmitted to the wheels through the ring gear 93 of the planetary gear mechanism 9, realizing a power-split drive mode.

[0022] In some embodiments, the first transmission mechanism includes a first gear 8, a second gear 18, a third gear 16, and a fourth gear 14. The first gear 8 is concentrically arranged and fixedly connected to the gear ring 93; the second gear 18 meshes with the first gear 8; the third gear 16 is fixedly connected to the second gear 18 via a first intermediate shaft; the fourth gear 14 meshes with the third gear 16 and is fixedly connected to the differential 13. In this embodiment, the transmission function of the first transmission mechanism is achieved through four gears, resulting in a simple structure and low cost.

[0023] In some embodiments, the first intermediate shaft includes a first half-shaft and a second half-shaft coaxially arranged. The driving plate and driven plate of the second clutch 17 are respectively disposed on the first half-shaft and the second half-shaft to control the engagement and disengagement of the first half-shaft and the second half-shaft. In this embodiment, the second clutch 17 is disposed here, which is easy to install and also makes the structure of the second clutch 17 simple and the cost low.

[0024] In some embodiments, the first gear 8 is sleeved on the direct drive shaft 4, and the first clutch 7 is disposed between the direct drive shaft 4 and the first gear 8 to control the engagement and disengagement of the direct drive shaft 4 and the first gear 8. In this embodiment, the first clutch 7 is disposed in this position, which can compress space and reduce the size of the hybrid drive system.

[0025] In some embodiments, the second transmission mechanism includes a fifth gear 6 and a sixth gear 12. The fifth gear 6 is fixedly connected to the output shaft of the second motor 5. The sixth gear 12 meshes with the fifth gear 6 and is fixedly connected to a third gear 16 via a second intermediate shaft 15. The second intermediate shaft 15 is coaxially arranged with the first intermediate shaft. In this embodiment, the second transmission mechanism shares the gears of the first transmission mechanism to transmit power to the wheels, which can further reduce the number of components in the hybrid drive system, reduce costs, and compress volume.

[0026] In some embodiments, the vehicle hybrid drive system further includes a shock absorber 3, which is disposed between the engine output shaft 2 and the direct drive shaft 4. The engine output shaft 2 can be connected to the left end of the shock absorber 3, and the direct drive shaft 4 can be connected to the right end of the shock absorber 3. In this embodiment, by providing the shock absorber 3, the vibration transmitted from the engine 1 to other components of the hybrid drive system can be reduced, thereby improving the driving comfort of the vehicle.

[0027] In some embodiments, the planetary gear mechanism 9 further includes a gear ring holder 91, with a gear ring 93 fixedly connected to the gear ring holder 91, and a first gear 8 fixedly mounted on the gear ring holder 91; the outer end of the first clutch 7 is mounted on the first gear 8, and the inner end of the first clutch 7 is mounted on the direct drive shaft 4. In this embodiment, the first clutch 7 can be located inside the first gear 8, further compressing space and reducing the volume of the hybrid drive system.

[0028] According to a second aspect of this application, embodiments of this application also provide a vehicle, the vehicle including the vehicle hybrid drive system provided in any embodiment of the first aspect of this application.

[0029] The vehicle hybrid drive system provided in the embodiments of this application can achieve multiple operating conditions, such as simultaneous engine power generation and driving, range extension, and direct motor drive, through a planetary gear mechanism and dual clutch. The working principle under some operating conditions is as follows:

[0030] 1. Pure Electric Drive: In this mode, the first and second clutches disengage, and the second motor outputs power. This power is then transmitted from the second motor to the fifth gear, which is fixedly connected to it. The fifth gear transmits power to the sixth gear, which in turn transmits power to the second intermediate shaft, which is also fixedly connected to it. The second intermediate shaft then transmits power to the third gear, which in turn transmits power to the fourth gear, which in turn transmits power to the differential and finally to the wheels. Under this condition, the second motor's energy source is the electrical energy stored in the vehicle's battery.

[0031] 2. Power split drive mode: The first clutch is engaged and the second clutch is engaged. Part of the engine power is transmitted to the first motor to generate electricity through the sun gear of the planetary gear mechanism, and part of the power is transmitted to the wheel drive through the ring gear of the planetary gear mechanism, thus realizing power split.

[0032] 3. Engine Start-up: At this time, the first clutch engages and the second clutch disengages. The first motor outputs power, which is transmitted through the first motor's fixed output shaft to the first motor, and then through the planetary gear mechanism to the direct drive shaft, shock absorbers, and engine output shaft, thus driving the engine to rotate and starting the engine. At this time, the energy source for the first motor is the electrical energy stored in the vehicle's battery.

[0033] 4. Range-extended power generation mode: In this mode, the engine transmits power to the first motor in the reverse path of engine startup, and generates electricity through the first motor. The second motor can then use the power generated by the first motor to output power.

[0034] 5. Energy recovery: When the vehicle is coasting or braking, the wheels drive a second motor to generate electricity, which is then stored in the battery.

[0035] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0036] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A vehicle hybrid drive system, characterized by, The vehicle hybrid drive system comprises: an engine having an engine output shaft; a planetary gear mechanism comprising a ring gear, a planet carrier, planet gears and a sun gear, the planet gears being rotatably arranged on the planet carrier, the planet gears being engaged with the ring gear and the sun gear at the same time, the engine output shaft being fixedly connected with the planet carrier through a direct drive shaft; a first motor having a first motor output shaft, the first motor output shaft being fixedly connected with the sun gear; a first clutch arranged on the direct drive shaft, the first clutch being configured to control the engagement and disengagement of the direct drive shaft and the ring gear; a first transmission mechanism, the ring gear being drivingly connected with a differential of a vehicle through the first transmission mechanism; a second clutch arranged on the first transmission mechanism, the second clutch being configured to control the engagement and disengagement of the first transmission mechanism to control the driving connection between the ring gear and the differential; a second motor drivingly connected with the differential through a second transmission mechanism.

2. The vehicle hybrid drive system of claim 1, wherein The first transmission mechanism comprises: a first gear concentrically arranged with the ring gear and fixedly connected therewith; a second gear engaged with the first gear; a third gear fixedly connected with the second gear through a first intermediate shaft; a fourth gear engaged with the third gear, the fourth gear being fixedly connected with the differential.

3. The vehicle hybrid drive system according to claim 2, wherein the first intermediate shaft comprises a first half shaft and a second half shaft arranged coaxially, the driving disc and the driven disc of the second clutch being arranged on the first half shaft and the second half shaft respectively to control the engagement and disengagement of the first half shaft and the second half shaft.

4. The vehicle hybrid drive system according to claim 2, wherein the first gear is sleeved on the direct drive shaft, the first clutch being arranged between the direct drive shaft and the first gear to control the engagement and disengagement of the direct drive shaft and the first gear.

5. The vehicle hybrid drive system of claim 2, wherein, The second transmission mechanism comprises: a fifth gear fixedly connected with a second motor output shaft of the second motor; a sixth gear engaged with the fifth gear, the sixth gear being fixedly connected with the third gear through a second intermediate shaft, the second intermediate shaft being arranged coaxially with the first intermediate shaft.

6. The vehicle hybrid drive system of claim 1, wherein, A shock absorber is further arranged between the engine output shaft and the direct drive shaft.

7. The vehicle hybrid drive system according to claim 2, wherein the planetary gear mechanism further comprises a ring gear carrier, the ring gear being fixedly connected with the ring gear carrier, the first gear being fixedly arranged on the ring gear carrier; an outer end of the first clutch being arranged on the first gear, an inner end of the first clutch being arranged on the direct drive shaft.

8. A vehicle characterized by comprising: The vehicle hybrid drive system according to any one of claims 1-7.

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