Novel double-planet-row hybrid power system suitable for light truck

Abstract

The novel double-planet-row hybrid power system suitable for the light truck comprises an engine, a first motor, a second motor, a front planet row and a rear planet row, a front planet carrier of the front planet row is connected with a rear gear ring of the rear planet row, and the rear gear ring is connected with a flange to output power. The engine is connected with the rear planet carrier through the torsion damper and the first input shaft. The first motor is connected with the rear sun gear through a second input shaft; the second motor is connected with the front sun gear through a third input shaft. The novel double-planet-row hybrid power system suitable for the light truck can be widely applied to the field of new energy commercial vehicles, especially light trucks which are high in power requirement, high in cost pressure and high in oil consumption, the power performance of the whole truck is enhanced, meanwhile, the comfort, the safety and the economical efficiency of the whole truck are improved, the structure and operation cost of the truck is reduced, and the service life of the truck is prolonged. Wide popularization and application prospects are realized, and the practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile transmission systems, in particular to a novel double planetary gear hybrid system suitable for light trucks. Background Art

[0002] A hybrid vehicle is a vehicle whose drive system is composed of two or more single drive systems that can operate simultaneously. The vehicle's driving power is provided by a single drive system alone or together according to the actual vehicle driving state. The hybrid system is the core of a hybrid vehicle and directly determines the vehicle's power, economy and cost. Hybrid light trucks mainly use the P2 hybrid architecture, which has problems such as excessive axial length of the powertrain, power interruption during gear shifting, and low fuel saving rate. Recently, dual-motor hybrid powertrains have gradually appeared in the market, but their structure is complex and costly.

[0003] Up to now, there is no drive system suitable for light trucks on the market that can improve the power of the whole vehicle while meeting the requirements of uninterrupted power during gear shifting, simple structure, and low cost.

[0004] Therefore, a new dual planetary gearbox hybrid system suitable for light trucks is proposed. Utility Model Content

[0005] The utility model aims to solve the problems raised in the background technology and provides a novel double planetary gear hybrid system suitable for light trucks.

[0006] The specific technical solutions are as follows:

[0007] A new dual planetary gearbox hybrid system suitable for light trucks, including:

[0008] An engine, a first motor, a second motor, a front planetary gear and a rear planetary gear, wherein:

[0009] The front planet carrier of the front planetary gear set is connected to the rear ring gear of the rear planetary gear set, and the rear ring gear is connected to a flange for power output;

[0010] The engine is connected to the rear planet carrier via a torsional vibration damper and a first input shaft;

[0011] The first motor is connected to the rear sun gear via a second input shaft;

[0012] The second motor is connected to the front sun gear via a third input shaft;

[0013] A mode switching device is provided at the front ends of the first input shaft and the second input shaft;

[0014] The first motor, the second motor, the first input shaft, the second input shaft, the third input shaft, the engine, and the torsional vibration damper are coaxially arranged.

[0015] As a preferred solution of the utility model, the front planet carrier is provided with two sets of planetary gears, which are inner planetary gears and outer planetary gears respectively; the rear planet carrier is provided with only one set of rear planetary gears.

[0016] As a preferred solution of the present utility model, the first input shaft, the second input shaft and the third input shaft are coaxially arranged from inside to outside.

[0017] As a preferred solution of the present invention, the front gear ring is fixedly connected to the housing and cannot rotate.

[0018] As a preferred solution of the utility model, the mode switching device is arranged at the front end of the first input shaft and the second input shaft, and the switching between the pure electric mode, the engine direct drive mode and the hybrid mode is realized by locking the first input shaft, the second input shaft or not locking both.

[0019] As a preferred solution of the utility model, a sliding sleeve is slidably installed in the housing for connecting the housing with the first input shaft or the second input shaft, and the sliding sleeve is located between the first input shaft and the second input shaft.

[0020] The utility model has the following beneficial effects:

[0021] The new dual planetary gear hybrid system suitable for light trucks provided by the utility model can be widely used in the field of new energy commercial vehicles, especially for light trucks with high power requirements, high cost pressure and high fuel consumption. While enhancing the power of the whole vehicle, it improves the comfort, safety and economy of the whole vehicle, reduces the vehicle structure and operating costs, has broad prospects for promotion and application, and is good in practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a novel dual planetary gearbox hybrid system suitable for light trucks provided in an embodiment of the utility model.

[0023] In the attached figure:

[0024] 1. Engine; 2. Torsional vibration damper; 3. First input shaft; 4. Housing; 5. First motor; 6. Second input shaft; 7. Second motor; 8. Third input shaft; 9. Front sun gear; 10. Inner planetary gear; 11. Outer planetary gear; 12. Front ring gear; 13. Front planetary carrier; 14. Rear ring gear; 15. Rear planetary gear; 16. Rear sun gear; 17. Rear planetary carrier; 18. Flange; 19. Sleeve. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example

[0030] The new dual planetary gearbox hybrid system provided in this embodiment is suitable for light trucks. Figure 1 As shown, including:

[0031] Engine 1, first motor 5, second motor 7, front planetary gear and rear planetary gear, wherein:

[0032] The front planet carrier 13 of the front planetary gear set is connected to the rear ring gear 14 of the rear planetary gear set, and the rear ring gear 14 is connected to the flange 18 for power output;

[0033] The engine 1 is connected to the rear planetary carrier 17 via the torsional vibration damper 2 and the first input shaft 3;

[0034] The first motor 5 is connected to the rear sun gear 16 via the second input shaft 6;

[0035] The second motor 7 is connected to the front sun gear 9 via the third input shaft 8;

[0036] A mode switching device is provided at the front ends of the first input shaft 3 and the second input shaft 6;

[0037] The first motor 5, the second motor 7, the first input shaft 3, the second input shaft 6, the third input shaft 8, the engine 1, and the torsional vibration damper 2 are coaxially arranged.

[0038] The front planet carrier 13 is provided with two sets of planetary gears, which are inner planetary gears 10 and outer planetary gears 11 ; the rear planet carrier 17 is provided with only one set of rear planetary gears 15 .

[0039] The first input shaft 3 , the second input shaft 6 , and the third input shaft 8 are coaxially arranged from inside to outside.

[0040] The front gear ring 12 is fixedly connected to the housing 4 and cannot rotate.

[0041] Among them, the mode switching device is arranged at the front end of the first input shaft 3 and the second input shaft 6, and the switching among the pure electric mode, the engine direct drive mode and the hybrid mode is realized by locking the first input shaft 3, the second input shaft 6 or unlocking both.

[0042] A sleeve 19 is slidably installed in the housing 4 to connect it to the first input shaft 3 or the second input shaft 6. The sleeve 19 is located between the first input shaft 3 and the second input shaft 6, and the mode switching device is transmission-connected to the sleeve 19 to drive the sleeve 19 to move.

[0043] In summary, the novel dual planetary gearbox hybrid system applicable to light trucks provided in this embodiment has the following advantages:

[0044] This new dual planetary gear hybrid system suitable for light trucks can be widely used in the field of new energy commercial vehicles, especially for light trucks with high power requirements, high cost pressure and high fuel consumption. While enhancing the power of the whole vehicle, it improves the comfort, safety and economy of the whole vehicle, reduces the vehicle structure and operating costs, has broad prospects for promotion and application, and is good in practicality.

[0045] When using:

[0046] The power of the engine 1 is sequentially transmitted to the front planetary carrier 13 through the torsional vibration damper 2 and the first input shaft 3, the power of the first motor 5 is transmitted to the rear sun gear 16 through the second input shaft 6, and the power of the engine 1 and the first motor 5 is coupled and output to the rear ring gear 14. The speed regulation of the first motor 5 ensures that the speed of the engine 1 is decoupled from the vehicle speed, so that the engine 1 always works in the economic speed range, reducing the fuel consumption of the whole vehicle and improving the economy.

[0047] The power of the second motor 7 is transmitted to the front sun gear 9 through the third input shaft 8, and the speed is reduced and the torque is increased through the inner planetary gear 10, the outer planetary gear 11 and the front ring gear 12 of the front planetary gear. The power of the second motor 7 is transmitted to the front planetary carrier 13 and the rear ring gear 14 through the third input shaft 8 and the front sun gear 9. The power of the engine 1, the first motor 5 and the second motor 7 is coupled to the flange 18 at the rear ring gear 14, thereby driving the vehicle. The front planetary carrier 13 is provided with the inner planetary gear 10 and the outer planetary gear 11, which effectively increases the reduction ratio of the front planetary gear and improves the power of the vehicle.

[0048] A mode switching device is arranged at the front end of the first input shaft 3 and the second input shaft 6, and the different positions of the sliding sleeve 19 are adjusted so that the system has a pure electric mode, a hybrid mode, and an engine direct drive mode.

[0049] Pure electric mode: The sleeve 19 is at the leftmost position, and the housing 4 and the first input shaft 3 are connected through the sleeve 19, so that the first input shaft 3 connected to the engine 1 cannot rotate. The power of the first motor 5 is transmitted to the rear ring gear 14 through the rear planetary gearbox; the power of the second motor 7 is transmitted to the front planetary carrier 13 and the rear ring gear 14 through the front planetary gearbox. The power of the first motor 5 and the second motor 7 is coupled to the rear ring gear 14 and then transmitted to the flange 18.

[0050] Hybrid mode: the sleeve 19 is in the middle position, the first input shaft 3 and the second input shaft 6 are not locked, and the power of the engine 1 and the first motor 5 is coupled to the rear ring gear 14 for power output. If the power is insufficient, the second motor 7 compensates the power through the front planetary gear.

[0051] Engine direct drive mode: The sleeve 19 is at the rightmost position, and the housing 4 is connected to the second input shaft 6 through the sleeve 19, so that the second input shaft 6 connected to the first motor 5 cannot rotate. The power of the engine 1 is transmitted to the rear ring gear 14 through the rear planetary gearbox to enable the vehicle to have a higher speed. If the power is insufficient, the second motor 7 compensates the power through the front planetary gearbox.

[0052] It is worth noting that the mode switching device is a prior art, and it is sufficient as long as the different positions of the sliding sleeve 19 can be adjusted so that the system has a pure electric mode, a hybrid mode, and an engine direct drive mode.

[0053] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A new dual planetary gearbox hybrid system suitable for light trucks, characterized in that: include: An engine (1), a first motor (5), a second motor (7), a front planetary gear and a rear planetary gear, wherein: The front planet carrier (13) of the front planetary gear set is connected to the rear ring gear (14) of the rear planetary gear set, and the rear ring gear (14) is connected to a flange (18) for power output; The engine (1) is connected to the rear planetary carrier (17) via a torsional vibration damper (2) and a first input shaft (3); The first motor (5) is connected to the rear sun gear (16) via a second input shaft (6); The second motor (7) is connected to the front sun gear (9) via a third input shaft (8); A mode switching device is arranged at the front end of the first input shaft (3) and the second input shaft (6); The first motor (5), the second motor (7), the first input shaft (3), the second input shaft (6), the third input shaft (8), the engine (1), and the torsional vibration damper (2) are coaxially arranged.

2. The novel dual planetary gearbox hybrid system suitable for light trucks according to claim 1 is characterized in that: The novel dual planetary gear hybrid system also includes a housing (4); the front planet carrier (13) is provided with two sets of planetary gears and a front ring gear (12); the front ring gear (12) is fixedly connected to the housing (4) and cannot rotate; the two sets of planetary gears are respectively an inner planetary gear (10) and an outer planetary gear (11); and the rear planet carrier (17) is provided with only one set of rear planetary gears (15).

3. The novel dual planetary gearbox hybrid system suitable for light trucks according to claim 2 is characterized in that: The first input shaft (3), the second input shaft (6) and the third input shaft (8) are coaxially arranged from inside to outside.

4. The novel dual planetary gearbox hybrid system suitable for light trucks according to claim 2 is characterized in that: The mode switching device is arranged at the front end of the first input shaft (3) and the second input shaft (6), and realizes the switching of the pure electric mode, the engine direct drive mode and the hybrid mode by locking the first input shaft (3) and the second input shaft (6) or not locking both.

5. The novel dual planetary gearbox hybrid system suitable for light trucks according to claim 2 is characterized in that: A sliding sleeve (19) is slidably mounted in the housing (4) for connecting the housing (4) with the first input shaft (3) or the second input shaft (6); the sliding sleeve (19) is located between the first input shaft (3) and the second input shaft (6).

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