Two-gear power system for hybrid vehicle model

Abstract

The utility model discloses a two-gear power system for a hybrid vehicle model. The two-gear power system comprises an engine, a driving motor, an input shaft, a motor shaft, an intermediate shaft, a first gear, a second gear, an input gear, an output gear, a sun gear, a planet gear, a fixed gear ring, a planet carrier, a joint component and a gear shifting component, the input shaft, the motor shaft and the intermediate shaft are respectively and rotatably arranged, the engine is connected with the input shaft, the driving motor is connected with the motor shaft, the first gear is hollowly sleeved on the input shaft, the second gear is connected to the motor shaft, the input gear is connected to the intermediate shaft, and the second gear is connected to the motor shaft. The first gear and the second gear are both meshed with the input gear. The gear shifting device has two gears and can switch the gears according to the vehicle speed, high-speed and low-speed driving working conditions of the vehicle can be considered, the driving motor and the engine can be kept working in a high-efficiency interval, and the gear shifting device is favorable for prolonging the endurance of pure electricity and improving the fuel economy.

Description

Technical Field

[0001] The utility model relates to a two-speed power system for a hybrid vehicle. Background Art

[0002] At present, hybrid power refers to a car that has two driving modes: engine drive and motor drive. Hybrid power is one of the main power forms currently used by new energy vehicles. Some existing hybrid power systems only have one gear. For example, the Chinese patent with publication number CN107499111A discloses a hybrid power vehicle transmission system with multiple modes, which has only one gear. However, one gear cannot take into account both high-speed and low-speed driving conditions of the vehicle at the same time, and the gear cannot be switched according to the vehicle speed, which will cause the drive motor and engine to not always work in the high-efficiency range, which will in turn affect the pure electric endurance and fuel economy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a two-speed power system for a hybrid vehicle. The system has two gears and can switch gears according to the vehicle speed, can take into account both high-speed and low-speed driving conditions of the vehicle, and can keep the drive motor and the engine operating in a high-efficiency range, which is beneficial to improving pure electric endurance and fuel economy.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a two-speed power system for a hybrid vehicle, which includes an engine, a drive motor, an input shaft, a motor shaft, an intermediate shaft, a first gear, a second gear, an input gear, an output gear, a sun gear, a planetary gear, a fixed ring gear, a planetary carrier, a coupling component and a shift component;

[0005] The input shaft, the motor shaft and the intermediate shaft are respectively rotatably arranged;

[0006] The engine is connected to the input shaft;

[0007] The driving motor is connected to the motor shaft;

[0008] The first gear is loosely sleeved on the input shaft;

[0009] The second gear is connected to the motor shaft;

[0010] The input gear is connected to the intermediate shaft;

[0011] The first gear and the second gear are respectively meshed with the input gear;

[0012] The engaging member is disposed between the input shaft and the first gear and is used to connect or disconnect the input shaft from the first gear for transmission;

[0013] The sun gear is connected to the intermediate shaft;

[0014] The fixed gear ring is located on the outer side of the sun gear and is fixedly arranged;

[0015] The planetary gear is located between the sun gear and the fixed gear ring and is meshed with the sun gear and the fixed gear ring respectively;

[0016] The planet carrier is connected to the planet gear;

[0017] The output gear is loosely sleeved on the intermediate shaft;

[0018] The shift component is arranged between the output gear, the intermediate shaft and the planetary carrier. The shift component is used to switch to a first combination state so that the output gear is synchronously connected to the intermediate shaft. The shift component is also used to switch to a second combination state so that the output gear is synchronously connected to the planetary carrier.

[0019] A specific structure of the engagement component is further provided, wherein the engagement component is a clutch or a synchronizer.

[0020] A specific structure of the shift component is further provided, wherein the shift component is a clutch or a synchronizer.

[0021] Furthermore, the two-speed power system for the hybrid vehicle model further includes a generator and a generator shaft;

[0022] The power generation shaft is rotatably arranged;

[0023] The generator is connected to the power generation shaft;

[0024] The input shaft is drivingly connected to the generator shaft via a transmission assembly.

[0025] A specific structure of the transmission assembly is further provided, the transmission assembly includes a third gear and a fourth gear; wherein the third gear is connected to the input shaft, the fourth gear is connected to the generator shaft, and the third gear is meshed with the fourth gear.

[0026] Furthermore, the two-speed power system for the hybrid vehicle also includes a differential, the differential has a fifth gear, and the output gear is meshed with the fifth gear.

[0027] Furthermore, the engine is connected to the input shaft via a shock absorber.

[0028] Furthermore, a plurality of the planetary gears are distributed along the circumference of the sun gear, and each of the planetary gears is rotationally connected to the planet carrier.

[0029] After adopting the above technical solution, when the shift component is switched to the first combination state, the output gear is synchronously connected with the intermediate shaft through the shift component, which is a high-speed gear. At the high-speed gear, the input gear drives the intermediate shaft to rotate, and the intermediate shaft drives the output gear to rotate through the shift component. At the high-speed gear, the speeds of the input gear, the intermediate shaft and the output gear are the same, and the output torque of the output gear is small. When the shift component is switched to the second combination state, the output gear is synchronously connected with the planetary carrier through the shift component, which is a low-speed gear. At the low-speed gear, the input gear drives the intermediate shaft to rotate, the intermediate shaft drives the sun gear to rotate, the sun gear drives the planetary gear to revolve, and the planetary gear revolves and drives the planetary carrier to rotate, and the planetary carrier drives the output gear to rotate through the shift component. At the low-speed gear, the speed of the output gear is lower than the speed of the input gear, and the output torque of the output gear is large. Therefore, when the vehicle speed is low and a large torque is required, the gear is switched to a low-speed gear position, and when the vehicle speed is high, the gear is switched according to the vehicle speed, so that the high-speed and low-speed driving conditions of the vehicle can be taken into account, and the drive motor and the engine can be kept in the high-efficiency range, thereby improving the transmission efficiency, which is conducive to improving the pure electric cruising range and improving fuel economy. Further, in the pure electric mode, the engagement component is disconnected so that the input shaft is disconnected from the first gear, and the drive motor drives the second gear to rotate and then drives the input gear to rotate alone. In the parallel mode, the engagement component is combined so that the input shaft is synchronously connected with the first gear, and the engine drives the first gear to rotate, and the drive motor drives the second gear to rotate, and the first gear and the second gear jointly drive the input gear to rotate. In the direct drive mode, the engagement component is combined so that the input shaft is synchronously connected with the first gear, and the power supply to the drive motor is stopped at this time to stop the drive motor from driving, and the engine drives the first gear to rotate and then drives the input gear to rotate alone. Among them, the input gear can drive the output gear to rotate through the high-speed gear or the low-speed gear, and the output gear can output power to the outside to drive the vehicle to travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a two-speed power system for a hybrid vehicle of the utility model. DETAILED DESCRIPTION

[0031] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, a two-speed power system for a hybrid vehicle includes an engine 1, a drive motor 2, an input shaft 3, a motor shaft 4, an intermediate shaft 5, a first gear 6, a second gear 7, an input gear 8, an output gear 9, a sun gear 10, a planetary gear 11, a fixed ring gear 12, a planetary carrier 13, a coupling component 14 and a shift component 15;

[0033] The input shaft 3, the motor shaft 4 and the intermediate shaft 5 are respectively rotatably arranged;

[0034] The engine 1 is connected to the input shaft 3;

[0035] The driving motor 2 is connected to the motor shaft 4;

[0036] The first gear 6 is loosely sleeved on the input shaft 3;

[0037] The second gear 7 is connected to the motor shaft 4;

[0038] The input gear 8 is connected to the intermediate shaft 5;

[0039] The first gear 6 and the second gear 7 are respectively meshed with the input gear 8;

[0040] The coupling component 14 is disposed between the input shaft 3 and the first gear 6 and is used to couple or disconnect the input shaft 3 with the first gear 6 for transmission;

[0041] The sun gear 10 is connected to the intermediate shaft 5;

[0042] The fixed gear ring 12 is located outside the sun gear 10 and is fixedly arranged;

[0043] The planetary gear 11 is located between the sun gear 10 and the fixed gear ring 12 and meshes with the sun gear 10 and the fixed gear ring 12 respectively;

[0044] The planet carrier 13 is connected to the planet gear 11;

[0045] The output gear 9 is loosely sleeved on the intermediate shaft 5;

[0046] The shift component 15 is arranged between the output gear 9, the intermediate shaft 5 and the planetary carrier 13. The shift component 15 is used to switch to a first connection state so that the output gear 9 is synchronously connected to the intermediate shaft 5. The shift component 15 is also used to switch to a second connection state so that the output gear 9 is synchronously connected to the planetary carrier 13.

[0047] Specifically, when the shift component 15 is switched to the first engagement state, the output gear 9 is synchronously connected to the intermediate shaft 5 through the shift component 15, and it is a high-speed gear. At the high-speed gear, the input gear 8 drives the intermediate shaft 5 to rotate, and the intermediate shaft 5 drives the output gear 9 to rotate through the shift component 15. At the high-speed gear, the rotation speeds of the input gear 8, the intermediate shaft 5 and the output gear 9 are the same, and the output torque of the output gear 9 is small. When the shift component 15 is switched to the second engagement state, the output gear 9 is synchronously connected to the planetary carrier 13 through the shift component 15, and it is a low-speed gear. At the low-speed gear, the input gear 8 drives the intermediate shaft 5 to rotate, the intermediate shaft 5 drives the sun gear 10 to rotate, the sun gear 10 drives the planetary gear 11 to revolve, and the planetary gear 11 drives the planetary carrier 13 to rotate when revolving, and the planetary carrier 13 drives the output gear 9 to rotate through the shift component 15. At the low-speed gear, the rotation speed of the output gear 9 is lower than the rotation speed of the input gear 8, and the output torque of the output gear 9 is large. Therefore, when the vehicle speed is low and a large torque is required, it switches to a low-speed gear, and when the vehicle speed is high, it switches to a high-speed gear. The gear can be switched according to the vehicle speed, thereby taking into account both high-speed and low-speed driving conditions of the vehicle, and can keep the drive motor 2 and the engine 1 operating in a high-efficiency range, thereby improving the transmission efficiency, which is beneficial to increasing the pure electric cruising range and improving fuel economy.

[0048] To be more specific, in the pure electric mode, the coupling component 14 is disconnected so that the input shaft 3 is disconnected from the first gear 6, and the drive motor 2 drives the second gear 7 to rotate and then drives the input gear 8 to rotate alone. In the parallel mode, the coupling component 14 is combined so that the input shaft 3 is synchronously connected with the first gear 6, and the engine 1 drives the first gear 6 to rotate, the drive motor 2 drives the second gear 7 to rotate, and the first gear 6 and the second gear 7 jointly drive the input gear 8 to rotate. In the direct drive mode, the coupling component 14 is combined so that the input shaft 3 is synchronously connected with the first gear 6, and the power supply to the drive motor 2 is stopped so that the drive motor 2 stops driving, and the engine 1 drives the first gear 6 to rotate and then drives the input gear 8 to rotate alone. Among them, the input gear 8 can drive the output gear 9 to rotate through the high speed gear or the low speed gear, and the output gear 9 can output power to the outside to drive the vehicle to travel. In addition, the embodiment of the present application has a compact structure, small space size, light weight, high transmission efficiency, low cost, and simple control logic.

[0049] Specifically, the coupling component 14 can be a clutch or a synchronizer, and the shift component 15 can be a clutch or a synchronizer; in the present embodiment, the coupling component 14 is a clutch, and when the coupling component 14 is engaged, the input shaft 3 is synchronously connected with the first gear 6, and when the coupling component 14 is disconnected, the input shaft 3 is disconnected from the first gear 6; in the present embodiment, the shift component 15 is a synchronizer, and when the shift component 15 is switched to the left, the output gear 9 is synchronously connected with the intermediate shaft 5, and when the shift component 15 is switched to the left, the output gear 9 is synchronously connected with the planetary carrier 13.

[0050] like Figure 1 As shown, the two-speed power system for the hybrid vehicle may further include a generator 16 and a generator shaft 17;

[0051] The power generation shaft 17 is rotatably arranged;

[0052] The generator 16 is connected to the power generation shaft 17;

[0053] The input shaft 3 is connected to the generator shaft 17 through a transmission assembly; specifically, the engine 1 drives the input shaft 3 to rotate, the input shaft 3 drives the generator shaft 17 to rotate through the transmission assembly, and the generator shaft 17 drives the generator 16 to work and generate electricity.

[0054] like Figure 1 As shown, the transmission assembly may include a third gear 18 and a fourth gear 19 ; wherein the third gear 18 is connected to the input shaft 3 , the fourth gear 19 is connected to the generator shaft 17 , and the third gear 18 is meshed with the fourth gear 19 .

[0055] like Figure 1 As shown, the two-speed power system for the hybrid vehicle may further include a differential 20, the differential 20 having a fifth gear 21, and the output gear 9 meshes with the fifth gear 21; specifically, the specific structure of the differential 20 is an existing technology well known to those skilled in the art, and will not be described in detail in this embodiment.

[0056] like Figure 1 As shown, the engine 1 can be connected to the input shaft 3 via a shock absorber 22 .

[0057] like Figure 1 As shown, there are multiple planetary gears 11 distributed along the circumference of the sun gear 10, and each of the planetary gears 11 is rotationally connected to the planet carrier 13; in this embodiment, the fixed ring gear 12 can be connected to the housing of the reducer.

[0058] In summary, when the shift member 15 is switched to the first engagement state, the output gear 9 is synchronously connected to the intermediate shaft 5 through the shift member 15, which is a high-speed gear. At the high-speed gear, the input gear 8 drives the intermediate shaft 5 to rotate, and the intermediate shaft 5 drives the output gear 9 to rotate through the shift member 15. At the high-speed gear, the rotation speeds of the input gear 8, the intermediate shaft 5 and the output gear 9 are the same, and the output torque of the output gear 9 is small. When the shift member 15 is switched to the second engagement state, the output gear 9 is synchronously connected to the planetary carrier 13 through the shift member 15, which is a low-speed gear. At the low-speed gear, the input gear 8 drives the intermediate shaft 5 to rotate, the intermediate shaft 5 drives the sun gear 10 to rotate, the sun gear 10 drives the planetary gear 11 to revolve, and the planetary gear 11 drives the planetary carrier 13 to rotate when revolving. The planetary carrier 13 drives the output gear 9 to rotate through the shift member 15. At the low-speed gear, the rotation speed of the output gear 9 is lower than the rotation speed of the input gear 8, and the output torque of the output gear 9 is large. Therefore, when the vehicle speed is low and a large torque is required, the gear is switched to a low-speed gear position, and when the vehicle speed is high, the gear position can be switched according to the vehicle speed, so that the high-speed and low-speed driving conditions of the vehicle can be taken into account, and the drive motor 2 and the engine 1 can be kept in the high-efficiency range, thereby improving the transmission efficiency, which is conducive to improving the pure electric cruising range and improving fuel economy. Further, in the pure electric mode, the coupling component 14 is disconnected, so that the input shaft 3 is disconnected from the first gear 6, and the drive motor 2 drives the second gear 7 to rotate and then drives the input gear 8 to rotate alone. In the parallel mode, the coupling component 14 is combined, so that the input shaft 3 is synchronously connected with the first gear 6. At this time, the engine 1 drives the first gear 6 to rotate, the drive motor 2 drives the second gear 7 to rotate, and the first gear 6 and the second gear 7 jointly drive the input gear 8 to rotate. In the direct drive mode, the coupling component 14 is combined, so that the input shaft 3 is synchronously connected with the first gear 6. At this time, the power supply to the drive motor 2 is stopped to stop the drive motor 2, and the engine 1 drives the first gear 6 to rotate and then drives the input gear 8 to rotate alone. The input gear 8 can drive the output gear 9 to rotate through a high-speed gear or a low-speed gear, and the output gear 9 can output power to the outside to drive the vehicle.

[0059] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-speed power system for a hybrid vehicle, characterized in that: It comprises an engine (1), a driving motor (2), an input shaft (3), a motor shaft (4), an intermediate shaft (5), a first gear (6), a second gear (7), an input gear (8), an output gear (9), a sun gear (10), planetary gears (11), a fixed ring gear (12), a planetary carrier (13), a coupling component (14) and a shift component (15); The input shaft (3), the motor shaft (4) and the intermediate shaft (5) are respectively rotatably arranged; The engine (1) is connected to the input shaft (3); The driving motor (2) is connected to the motor shaft (4); The first gear (6) is loosely sleeved on the input shaft (3); The second gear (7) is connected to the motor shaft (4); The input gear (8) is connected to the intermediate shaft (5); The first gear (6) and the second gear (7) are respectively meshed with the input gear (8); The coupling component (14) is arranged between the input shaft (3) and the first gear (6) and is used to connect or disconnect the input shaft (3) and the first gear (6); The sun gear (10) is connected to the intermediate shaft (5); The fixed gear ring (12) is located outside the sun gear (10) and is fixedly arranged; The planetary gear (11) is located between the sun gear (10) and the fixed gear ring (12) and is meshed with the sun gear (10) and the fixed gear ring (12) respectively; The planet carrier (13) is connected to the planet gear (11); The output gear (9) is loosely sleeved on the intermediate shaft (5); The shift component (15) is arranged between the output gear (9), the intermediate shaft (5) and the planetary carrier (13); the shift component (15) is used to switch to a first combined state so that the output gear (9) and the intermediate shaft (5) are synchronously connected in transmission; the shift component (15) is also used to switch to a second combined state so that the output gear (9) and the planetary carrier (13) are synchronously connected in transmission.

2. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: The engaging component (14) is a clutch or a synchronizer.

3. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: The shift component (15) is a clutch or a synchronizer.

4. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: It also includes a generator (16) and a generator shaft (17); The power generation shaft (17) is rotatably arranged; The generator (16) is connected to the power generation shaft (17); The input shaft (3) is transmission-connected to the generator shaft (17) via a transmission assembly.

5. The two-speed power system for a hybrid vehicle according to claim 4, characterized in that: The transmission assembly comprises a third gear (18) and a fourth gear (19); wherein the third gear (18) is connected to the input shaft (3), the fourth gear (19) is connected to the generator shaft (17), and the third gear (18) is meshed with the fourth gear (19).

6. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: The invention also comprises a differential (20), wherein the differential (20) has a fifth gear (21), and the output gear (9) is meshed with the fifth gear (21).

7. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: The engine (1) is connected to the input shaft (3) via a shock absorber (22).

8. The two-speed power system for a hybrid vehicle according to claim 1, characterized in that: A plurality of the planetary gears (11) are distributed along the circumference of the sun gear (10), and each of the planetary gears (11) is rotationally connected to the planet carrier (13).

Images