Hybrid power transmission system and vehicle

Abstract

The utility model provides a hybrid power transmission system and a vehicle, and belongs to the technical field of vehicles, the hybrid power transmission system comprises an engine, a motor, a planetary mechanism, a multi-gear gear set, an output gear set, an input shaft and an output shaft; the planetary mechanism is arranged in an inner cavity of the motor rotor, and an output shaft of the engine is connected or disconnected with a planet carrier of the planetary mechanism through the clutch; a sun gear of the planetary mechanism is connected to a rotor support on the inner side of the motor rotor through a sun gear connecting piece, and the sun gear is fixedly connected with the sun gear connecting piece. The rotor support is sleeved on the input shaft; the rotor support is connected with a mode gear, and the mode gear is connected with or disconnected from the multi-gear gear set through a mode synchronizer. And a gear ring of the planetary mechanism is coaxially connected with the input shaft. The sun gear is fixedly connected with the mode gear through the rotor support, the number of connecting pieces arranged between the sun gear and the mode gear can be reduced, and the problem of abnormal sound generated due to the fact that gaps at the connecting positions of the connecting pieces are large is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a hybrid power transmission system and a vehicle. Background Art

[0002] Most of the current hybrid power systems can achieve multiple driving modes, such as pure electric mode, engine direct drive mode, ECVT hybrid mode, extended range mode, etc. When implementing the ECVT mode, a planetary mechanism is usually set to adjust the speed. When the various actuators in the planetary mechanism are connected to the engine, motor, other actuators and other transmission parts, there will often be large gaps between the connecting parts between the components due to space limitations. When the vehicle is working, the gap will cause abnormal noise problems, the NVH performance of the hybrid power system will be reduced, and the driver's driving experience will be affected. Utility Model Content

[0003] The embodiments of the utility model provide a hybrid power transmission system and a vehicle, aiming to solve the technical problem that there are large gaps between components connected by a planetary mechanism and abnormal noise occurs when the vehicle switches modes.

[0004] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a hybrid power transmission system, including: an engine, a motor, a planetary mechanism, a multi-speed gear set, an output gear set, an input shaft and a second output shaft;

[0005] The planetary mechanism is arranged in the inner cavity of the motor rotor, and the first output shaft of the engine is engaged or disconnected with the planetary carrier of the planetary mechanism through a clutch; the sun gear of the planetary mechanism is connected to the rotor bracket inside the motor rotor through a sun gear connecting member; the rotor bracket is loosely mounted on the input shaft; a mode gear is connected to the rotor bracket, and the mode gear is engaged or disconnected with the multi-speed gear set through a mode synchronizer; the multi-speed gear set is coaxially connected to the input shaft, and the multi-speed gear set is connected to the output gear set through an intermediate shaft, and the output gear set is connected to the differential mechanism through the second output shaft; the ring gear of the planetary mechanism is coaxially connected to the input shaft.

[0006] In combination with the first aspect, in one achievable manner, a rotor support connector is provided at one end of the rotor support away from the engine, and the rotor support connector is rotatably connected to the input shaft; the mode gear is fixedly connected to the rotor support connector.

[0007] In combination with the first aspect, in one achievable manner, the inner hub of the clutch is connected to the first output shaft of the engine, and the outer hub of the clutch is connected to the planet carrier.

[0008] In combination with the first aspect, in one achievable manner, a limit slot is provided on the inner side of the rotor support corresponding to the position of the sun gear connecting member, and a retaining ring is provided in the limit slot for limiting the axial movement of the sun gear connecting member.

[0009] In combination with the first aspect, in one achievable manner, the gear hub of the mode synchronizer is connected to the driving gear of an adjacent gear in an adjacent multi-gear gear set, the gear hub is connected to the input shaft, the gear sleeve of the mode synchronizer is meshed with the gear hub and can slide axially along the input shaft, selectively engaging or disengaging with the mode gear.

[0010] In combination with the first aspect, in an achievable manner, the multi-gear gear set includes a first-gear gear set, a second-gear gear set, a third-gear gear set and an R-gear gear set; the third-gear driving gear in the three-gear gear set is connected to the gear hub as a whole, and the third-gear gear set and the second-gear gear set are engaged or disconnected with the intermediate shaft through a second synchronizer; the first-gear gear set and the R-gear gear set are engaged or disconnected with the intermediate shaft through a first synchronizer; wherein the first synchronizer and the second synchronizer are connected to the intermediate shaft.

[0011] In combination with the first aspect, in one achievable manner, the first gear gear set includes a first gear driving wheel and a first gear driven wheel meshingly connected to each other, the first gear driving wheel is coaxially connected to the input shaft; and the first gear driven wheel is loosely mounted on the intermediate shaft.

[0012] In combination with the first aspect, in one achievable manner, the second gear gear set includes a second gear driving wheel and a second gear driven wheel meshingly connected to each other, the second gear driving wheel is coaxially connected to the input shaft; and the second gear driven wheel is loosely mounted on the intermediate shaft.

[0013] In combination with the first aspect, in one achievable manner, the three-speed gear set includes a three-speed driving wheel and a three-speed driven wheel meshingly connected to each other, the three-speed driving wheel is coaxially connected to the input shaft; the three-speed driven wheel is loosely mounted on the intermediate shaft.

[0014] Compared with the prior art, the hybrid power transmission system provided by the utility model has the following beneficial effects: the sun gear is fixedly connected to the mode gear by using the rotor bracket of the motor, which can reduce the setting of the connecting parts between the sun gear and the mode gear, can effectively solve the problem of abnormal noise caused by the large gap at the connection of the connecting parts, and is also beneficial to the compactness of the structure; at the same time, due to the reduction of connecting parts, the power transmission path can also be reduced, thereby improving the efficiency of power transmission.

[0015] In a second aspect, an embodiment of the utility model further provides a vehicle, comprising the hybrid power transmission system.

[0016] By adjusting the connection relationship between the actuators in the planetary mechanism and the components in the hybrid power transmission system, the present application can effectively reduce the setting of connecting parts, solve the problem of large gaps between connecting parts, and further solve the technical problem of abnormal noise when the vehicle switches modes, thereby improving the NVH performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a hybrid power transmission system provided by an embodiment of the utility model;

[0018] Description of reference numerals:

[0019] 1. Clutch; 101. Inner hub; 102. Outer hub; 2. Sun gear connector; 3. Retaining ring; 4. Rotor bracket; 5. Ring gear; 6. Rotor bracket connector; 7. Mode gear; 8. Mode synchronizer; 9. Three-speed gear set; 10. Two-speed gear set; 11. One-speed gear set; 12. R-speed gear set; 13. Input shaft; 14. Output gear set; 15. First synchronizer; 16. Second synchronizer; 17. Second output shaft; 18. Differential mechanism; 19. Planet carrier; 20. Planetary gear; 21. Sun gear; 22. First output shaft; 23. Intermediate shaft. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0022] See also Figure 1The hybrid power transmission system provided by the utility model is now described. The hybrid power transmission system includes: an engine, a motor, a planetary mechanism, a multi-speed gear set, an output gear set 14, an input shaft 13 and an output shaft; the planetary mechanism is arranged in the inner cavity of the motor rotor, and the first output shaft 22 of the engine is engaged or disconnected with the planet carrier 19 of the planetary mechanism through a clutch 1; the sun gear 21 of the planetary mechanism is connected to the rotor bracket 4 on the inner side of the motor rotor through a sun gear connector 2, wherein the sun gear 21 is fixedly connected to the sun gear connector 2; the rotor bracket 4 is loosely sleeved on the input shaft 13; the rotor bracket 4 is connected with a mode gear 7, and the mode gear 7 is engaged or disconnected with the multi-speed gear set through a mode synchronizer 8; the multi-speed gear set is coaxially connected to the input shaft 13, the multi-speed gear set is connected to the output gear set 14 through an intermediate shaft 23, and the output gear set 14 is connected to the differential mechanism 18 through a second output shaft 17; the ring gear 5 of the planetary mechanism is coaxially connected to the input shaft 13 to transmit power to the left and right wheels of the vehicle.

[0023] The hybrid power transmission system provided by the utility model has the beneficial effect that the sun gear 21 is fixedly connected to the mode gear 7 by using the rotor bracket 4 of the motor, which can reduce the setting of the connecting parts between the sun gear 21 and the mode gear 7, can effectively solve the problem of abnormal noise caused by the large gap at the connection of the connecting parts, and is also beneficial to the compactness of the structure; at the same time, due to the reduction of connecting parts, the power transmission path can also be reduced, thereby improving the efficiency of power transmission.

[0024] The planetary mechanism includes a sun gear 21 and planetary gears 20 meshing around the sun gear 21 . Both the sun gear 21 and the planetary gears 20 are supported on the planet carrier 19 .

[0025] Specifically, the sun gear connector 2 has an inner ring, an outer ring, and a spoke connected between the inner ring and the outer ring, wherein the outer ring abuts against the inner side of the rotor bracket 4, and the spokes are evenly provided with weight-reducing holes along the circumferential direction. The outer ring is also provided with an axially thickened protrusion to improve the reliability of the sun gear connector 2 in limiting.

[0026] In some embodiments, see Figure 1 As shown, the end of the rotor support 4 away from the engine can be connected to the rotor support connector 6 by welding or bolting, and the rotor support connector 6 is rotatably supported on the input shaft 13; the mode gear 7 is fixedly connected to the rotor support connector 6. The sun gear 21 is fixedly connected to the mode gear 7 through the rotor support connector 6, without the need for bearing connection, thereby reducing the use of bearings.

[0027] Specifically, the rotor support connector 6 includes an inner hub and an annular wing plate arranged on the inner hub. The inner hub of the rotor support connector 6 is rotatably supported on the input shaft 13, and the mode gear 7 is axially connected to the inner hub; the radial end of the annular wing plate is connected to the rotor support 4.

[0028] In some embodiments, see Figure 1 As shown, the inner hub 101 of the clutch 1 is connected to the first output shaft 22 of the engine, and the outer hub 102 of the clutch 1 is connected to the planet carrier 19. Optionally, the outer hub 102 of the clutch 1 is connected to the first output shaft 22 of the engine, and the inner hub thereof is connected to the planet carrier 19.

[0029] In some embodiments, see Figure 1 As shown, a limit slot is provided on the inner side of the rotor support 4 corresponding to the position of the sun gear connector 2, and a retaining ring 3 is provided in the limit slot to limit the axial movement of the sun gear connector 2. Specifically, limit slots are provided on both sides of the axial direction of the sun gear connector 2, and retaining rings 3 are provided in the limit slots to limit the axial position of the sun gear connector 2, thereby realizing the axial position limit of the sun gear 21. Among them, the retaining ring 3 position hole uses an elastic retaining ring 3. The retaining ring 3 is selected to limit the sun gear connector 2, so that the sun gear connector 2 is easy to be installed in the rotor support 4.

[0030] Optionally, a peripheral shoulder for stopping the sun gear connecting member 2 is provided on the inner side of the rotor support 4 , and cooperates with the retaining ring 3 to limit the sun gear connecting member 2 from both sides.

[0031] In some embodiments, see Figure 1 As shown, the gear hub of the mode synchronizer 8 is connected to the driving gear of the adjacent gear in the adjacent multi-gear gear set, the gear hub is fixedly connected to the input shaft 13, and the gear sleeve of the mode synchronizer 8 is meshed with the gear hub and can slide axially along the input shaft 13, selectively engaging or disengaging with the mode gear 7. The installation method of the mode synchronizer 8 of the present application is not to be directly set on the input shaft 13, but to connect the gear hub of the mode synchronizer 8 with the adjacent driving gear in the multi-gear gear set as a whole, and the gear hub of the mode synchronizer 8 is fixed on the input shaft 13, so as to achieve the advantages of intensiveness and short force transmission path.

[0032] In some embodiments, see Figure 1 As shown, the multi-gear gear set includes a first-gear gear set 11, a second-gear gear set 10, a third-gear gear set 9 and an R-gear gear set 12; the third-gear driving gear in the three-gear gear set 9 is connected to the gear hub as a whole, and the third-gear gear set 9 and the second-gear gear set 10 are engaged or disconnected with the intermediate shaft 23 through the second synchronizer 16; the first-gear gear set 11 and the R-gear gear set 12 are engaged or disconnected with the intermediate shaft 23 through the first synchronizer 15; wherein the first synchronizer 15 and the second synchronizer 16 are connected to the intermediate shaft.

[0033] The first synchronizer 15 and the second synchronizer 16 are respectively arranged between every two adjacent gears, wherein the gear hubs of the first synchronizer 15 and the second synchronizer 16 are fixedly connected to the intermediate shaft 23, and the gear sleeves of the first synchronizer 15 and the second synchronizer 16 are meshed with their respective gear hubs and can slide axially along the intermediate shaft 23 to selectively connect with the driven gear of one of the adjacent gears to achieve gear switching.

[0034] In some embodiments, see Figure 1 As shown, the first gear gear set 11 includes a first gear driving wheel and a first gear driven wheel that are meshed and connected. The first gear driving wheel is coaxially connected to the input shaft 13; the first gear driven wheel is loosely mounted on the intermediate shaft and realizes synchronous rotation with the intermediate shaft 23 through the engagement of the first synchronizer 15.

[0035] In some embodiments, see Figure 1 As shown, the second gear gear set 10 includes a second gear driving wheel and a second gear driven wheel that are meshed and connected. The second gear driving wheel is coaxially connected to the input shaft 13; the second gear driven wheel is loosely mounted on the intermediate shaft and realizes synchronous rotation with the intermediate shaft 23 through the engagement of the second synchronizer 16.

[0036] In some embodiments, see Figure 1 As shown, the three-speed gear set 9 includes a three-speed driving wheel and a three-speed driven wheel that are meshed and connected. The three-speed driving wheel is coaxially connected to the input shaft 13; the three-speed driven wheel is loosely mounted on the intermediate shaft and realizes synchronous rotation with the intermediate shaft 23 through the engagement of the second synchronizer 16.

[0037] The R gear set 12 includes an R gear driving wheel and an R gear driven wheel that are meshed and connected. The R gear driving wheel is coaxially connected to the input shaft 13; the R gear driven wheel is loosely mounted on the intermediate shaft 23 and achieves synchronous rotation with the intermediate shaft 23 through the engagement of the first synchronizer 15.

[0038] In some embodiments, see Figure 1 As shown, the output gear set 14 includes an output driving wheel and an output driven wheel that are meshed and connected. The output driving wheel is coaxially connected to the intermediate shaft 23; the output driven wheel is coaxially connected to the second output shaft 17.

[0039] The hybrid power transmission system provided in this application can realize pure electric, ECVT hybrid, engine direct drive, extended-range power and other working modes, and can realize power switching in multiple modes and multiple gears to meet the long-term high-power and high-torque power output under various working conditions, and is suitable for use on off-road platforms.

[0040] See also Figure 1 As shown, the working principles of various working modes are as follows:

[0041] In pure electric mode, the clutch 1 is opened, the mode synchronizer 8 is combined with the mode gear 7, and the rotor bracket 4 is fixedly connected to the rotor bracket connector 6, the rotor bracket connector 6 is fixedly connected to the mode gear 7, and the gear hub of the mode synchronizer 8 is fixedly connected to the input shaft, so the motor rotor directly transmits power to the input shaft 13. There is no need to transmit power through other components in the middle, which can reduce the transmission path, reduce the transmission loss, and improve the transmission effect. Then, the first synchronizer 15 or the second synchronizer 16 is selected to connect with the gears of different gears to achieve the gear change; the power is then transmitted to the second output shaft 17 through the output gear set 14 by gear meshing, and the second output shaft 17 is connected to the differential mechanism 18, and the power is then transmitted to the wheels to achieve the pure electric mode.

[0042] For example, the first synchronizer 15 is meshed with the first gear driven gear in the first gear gear set 11, and the second synchronizer 16 is not meshed with the second gear gear set 10 and the third gear gear set 9. The power is transmitted to the input shaft 13, and then transmitted to the first gear driven gear through the first gear driving gear, and then transmitted to the intermediate shaft 23 through the first gear driven gear, and then transmitted to the output driving gear fixedly connected to the intermediate shaft, and then transmitted to the second output shaft 17 through the output driven gear, and then transmitted to the wheels through the differential mechanism 18, and the vehicle enters the first gear working mode; when the first synchronizer 15 is meshed with the R gear driven gear in the R gear set 12, the vehicle enters the pure electric reverse working mode.

[0043] In ECVT hybrid mode, the mode synchronizer 8 and the mode gear 7 are not engaged, and the engine transmits power to the planetary carrier 19 through the clutch 1, and transmits power to the sun gear 21 and the ring gear 5 through the meshing of the internal gears of the planetary mechanism: part of the power is transmitted from the sun gear 21 to the motor, and the motor power generation is controlled by the motor controller; the other part of the power is transmitted from the ring gear 5 to the intermediate shaft 23, and then the gear change is realized through the selection and combination of the first synchronizer 15 or the second synchronizer 16; the power is then transmitted to the second output shaft 17 through the output gear set 14 by gear meshing, and the second output shaft 17 is connected to the differential mechanism 18, and the power is then transmitted to the wheels to realize ECVT hybrid mode.

[0044] For example, the second synchronizer 16 is meshed with the third-gear driven gear in the third-gear gear set 9, the first synchronizer 15 is not engaged with the first-gear gear set 11 and the R-gear gear set 12, the power is transmitted to the input shaft 13, transmitted to the third-gear driven gear through the third-gear driving gear, and then transmitted to the intermediate shaft 23 through the third-gear driven gear, and then transmitted to the output driving gear fixedly connected to the intermediate shaft, and then transmitted to the second output shaft 17 through the output driven gear, and then transmitted to the wheels through the differential mechanism 18, and the vehicle enters the third-gear working mode.

[0045] When the engine is in direct drive mode, the clutch 1 is engaged, the mode synchronizer 8 is engaged with the mode gear 7, so that the ring gear 5 is fixedly connected to the sun gear 21, and the engine transmits power to the planetary carrier 19, and the ring gear 5 transmits the power to the input shaft 13; the first synchronizer 15 or the second synchronizer 16 is then connected to different gears to achieve gear change; the power is then transmitted to the second output shaft 17 through gear meshing, and the second output shaft 17 is connected to the differential mechanism 18, and the power is then transmitted to the wheels to achieve the engine direct drive mode.

[0046] In the range-extending mode, the clutch 1 is engaged, the mode synchronizer 8 is engaged with the mode gear 7, so that the ring gear 5 is fixedly connected with the sun gear 21, and the engine transmits power to the planetary carrier 19, and then to the sun gear 21, driving the motor to generate electricity, thereby realizing the range-extending mode.

[0047] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0048] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, comprising the hybrid power transmission system.

[0049] By adjusting the connection relationship between the actuators in the planetary mechanism and the components in the hybrid power transmission system, the present application can effectively reduce the setting of connecting parts, solve the problem of large gaps between connecting parts, and further solve the technical problem of abnormal noise when the vehicle switches modes, thereby improving the NVH performance of the entire vehicle and enhancing the driving experience of the driver.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid powertrain system, characterized in that: include: An engine, a motor, a planetary mechanism multi-speed gear set, an output gear set (14), an input shaft (13) and a second output shaft (17); The planetary mechanism is arranged in the inner cavity of the motor rotor; the first output shaft (22) of the engine is engaged with or disconnected from the planetary carrier (19) of the planetary mechanism through a clutch (1); the sun gear (21) of the planetary mechanism is connected to the rotor bracket (4) on the inner side of the motor rotor through a sun gear connecting member (2); the rotor bracket (4) is loosely sleeved on the input shaft (13); the rotor bracket (4) is also connected to a mode gear (7), and the mode gear (7) is engaged with or disconnected from the multi-speed gear set through a mode synchronizer (8); the multi-speed gear set is coaxially connected to the input shaft (13), the multi-speed gear set is connected to the output gear set (14) through an intermediate shaft (23), and the output gear set (14) is connected to the differential mechanism (18) through the second output shaft (17); the ring gear (5) of the planetary mechanism is coaxially connected to the input shaft (13).

2. The hybrid powertrain system according to claim 1, wherein: A rotor support connecting piece (6) is provided at one end of the rotor support (4) away from the engine, and the rotor support connecting piece (6) is rotatably connected to the input shaft (13); the mode gear (7) is fixedly connected to the rotor support connecting piece (6).

3. The hybrid powertrain system according to claim 1, wherein: The inner hub (101) of the clutch (1) is connected to the first output shaft (22) of the engine, and the outer hub (102) of the clutch (1) is connected to the planet carrier (19).

4. The hybrid powertrain system according to claim 1, wherein: A limit slot is provided on the inner side of the rotor support (4) corresponding to the position of the sun gear connecting member (2), and a retaining ring (3) is provided in the limit slot for limiting the axial movement of the sun gear connecting member (2).

5. The hybrid powertrain system of claim 1, wherein: The gear hub of the mode synchronizer (8) is connected to the driving gear of the adjacent gear in the adjacent multi-gear gear set, and the gear hub is connected to the input shaft (13). The gear sleeve of the mode synchronizer (8) is meshed with the gear hub and can slide axially along the input shaft (13) to selectively engage or disengage with the mode gear (7).

6. The hybrid powertrain system as claimed in claim 5, characterized in that: The multi-gear gear set comprises a first gear gear set (11), a second gear gear set (10), a third gear gear set (9) and an R gear set (12); the third gear driving gear in the three-gear gear set (9) is connected to the gear hub as a whole, the third gear gear set (9) and the second gear gear set (10) are engaged with or disconnected from the intermediate shaft (23) through a second synchronizer (16); the first gear gear set (11) and the R gear set (12) are engaged with or disconnected from the intermediate shaft (23) through a first synchronizer (15); wherein the first synchronizer (15) and the second synchronizer (16) are connected to the intermediate shaft (23).

7. The hybrid powertrain system of claim 6, wherein: The first gear gear set (11) comprises a first gear driving wheel and a first gear driven wheel which are meshed and connected, the first gear driving wheel is coaxially connected to the input shaft (13); the first gear driven wheel is loosely sleeved on the intermediate shaft (23).

8. The hybrid powertrain system of claim 6, wherein: The second-gear gear set (10) comprises a second-gear driving wheel and a second-gear driven wheel which are meshed and connected, the second-gear driving wheel is coaxially connected to the input shaft (13); and the second-gear driven wheel is loosely sleeved on the intermediate shaft (23).

9. The hybrid powertrain system of claim 6, wherein: The three-speed gear set (9) comprises a three-speed driving wheel and a three-speed driven wheel which are meshed and connected, the three-speed driving wheel is coaxially connected to the input shaft (13); the three-speed driven wheel is loosely sleeved on the intermediate shaft (23).

10. A vehicle, characterized in that: Comprising a hybrid powertrain system as claimed in any one of claims 1 to 9.

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