Four-gear driving system for hybrid vehicle

Abstract

The utility model discloses a four-gear driving system for a hybrid vehicle model. The transmission device comprises a driving motor, an engine, a first input shaft, a second input shaft, a main transmission shaft, an output shaft, a first driving gear, a first driven gear, a second driving gear, a second driven gear, a third driving gear, a third driven gear, a fourth driving gear, a fourth driven gear, a first joint component, a second joint component and a transmission mechanism. Wherein the first input shaft, the second input shaft, the main transmission shaft and the output shaft are respectively arranged in a rotating mode, the driving motor is connected with the first input shaft, and the engine is connected with the second input shaft. The power transmission of the engine and the power transmission of the driving motor are respectively provided with two gears which can be adjusted, the gears can be adjusted according to the vehicle speed so that the engine and the driving motor can always work in a high-efficiency area, oil consumption can be saved, electric energy can be saved, and the endurance mileage can be prolonged.

Description

Technical Field

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

[0002] At present, hybrid power refers to a car with two driving forms: engine drive and motor drive, and is widely used in the field of new energy vehicles. In the Chinese patent with announcement number CN219406148U, a dual-drive motor hybrid drive architecture using an electromagnetic clutch is disclosed. In this hybrid drive architecture, the drive motor can be driven purely by electricity, it can also be driven by direct drive of the engine, and it can also be driven by the engine and the drive motor in parallel. However, in this hybrid drive architecture, both the power transmission of the engine and the power transmission of the drive motor have only one gear, so the engine and the drive motor can only drive the vehicle with a fixed speed ratio, and the gear cannot be switched according to the vehicle speed. This causes the engine and the drive motor to be unable to work in the high-efficiency zone, but will work in the medium-efficiency zone or the low-efficiency zone for part of the time, which will lead to increased fuel consumption and increased power loss, affecting the cruising range. 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 four-speed drive system for hybrid vehicles, which can make the power transmission of the engine and the power transmission of the drive motor have two gears that can be adjusted respectively, and can adjust the gear according to the vehicle speed so that the engine and the drive motor always work in the high-efficiency zone, thereby saving fuel consumption, saving electric energy and extending the cruising range.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a four-speed drive system for a hybrid vehicle, which includes a drive motor, an engine, a first input shaft, a second input shaft, a main transmission shaft, an output shaft, a first driving gear, a first driven gear, a second driving gear, a second driven gear, a third driving gear, a third driven gear, a fourth driving gear, a fourth driven gear, a first engaging component, a second engaging component and a transmission mechanism;

[0005] The first input shaft, the second input shaft, the main transmission shaft and the output shaft are respectively rotatably arranged;

[0006] The driving motor is connected to the first input shaft;

[0007] The engine is connected to the second input shaft;

[0008] The main transmission shaft is transmission-connected to the output shaft via the transmission mechanism;

[0009] The first driving gear is connected to the first input shaft, the first driven gear is loosely sleeved on the main transmission shaft, and the first driving gear is meshed with the first driven gear;

[0010] The second driving gear is connected to the first input shaft, the second driven gear is loosely sleeved on the main transmission shaft, and the second driving gear is meshed with the second driven gear;

[0011] The third driving gear is connected to the second input shaft, the third driven gear is loosely mounted on the main transmission shaft, and the third driving gear is meshed with the third driven gear;

[0012] The fourth driving gear is connected to the second input shaft, the fourth driven gear is loosely sleeved on the main transmission shaft, and the fourth driving gear is meshed with the fourth driven gear;

[0013] The first engaging component is disposed on the main transmission shaft, the first engaging component is used to switch to be combined with the first driven gear so that the main transmission shaft and the first driven gear rotate synchronously, the first engaging component is also used to switch to be combined with the second driven gear so that the main transmission shaft and the second driven gear rotate synchronously, and the first engaging component is also used to switch to neutral gear;

[0014] The second engaging component is arranged on the main transmission shaft, and the second engaging component is used to switch to combine with the third driven gear so that the main transmission shaft and the third driven gear rotate synchronously. The second engaging component is also used to switch to combine with the fourth driven gear so that the main transmission shaft and the fourth driven gear rotate synchronously. The second engaging component is also used to switch to neutral gear.

[0015] Further, the first engagement component is a synchronizer or a clutch.

[0016] Further, the second engagement component is a synchronizer or a clutch.

[0017] A specific structure of the transmission mechanism is further provided, wherein the transmission mechanism includes a fifth gear and a sixth gear;

[0018] The fifth gear is connected to the main transmission shaft, the sixth gear is connected to the output shaft, and the fifth gear is meshed with the sixth gear.

[0019] Furthermore, the four-speed drive system for the hybrid vehicle also includes a generator and a secondary transmission shaft;

[0020] The secondary transmission shaft is rotatably arranged and drivingly connected to the second input shaft;

[0021] The generator is connected to the auxiliary transmission shaft.

[0022] Furthermore, the secondary transmission shaft is connected with a seventh gear, and the seventh gear is meshed with the fourth driving gear.

[0023] Furthermore, the drive motor and the first input shaft, the engine and the second input shaft, and the generator and the auxiliary transmission shaft are connected via splines respectively.

[0024] Further, the engine is connected to the second input shaft via a one-way clutch.

[0025] Further, a speed ratio between the first driving gear and the first driven gear is greater than a speed ratio between the second driving gear and the second driven gear.

[0026] Further, a speed ratio between the third driving gear and the third driven gear is greater than a speed ratio between the fourth driving gear and the fourth driven gear.

[0027] After adopting the above technical solution, when the first engaging component is switched to be combined with the first driven gear, the power of the driving motor is sequentially output through the first input shaft, the first driving gear, the first driven gear, the first engaging component, the main transmission shaft, the transmission mechanism and the output shaft. When the first engaging component is switched to be combined with the second driven gear, the power of the driving motor is sequentially output through the first input shaft, the second driving gear, the second driven gear, the first engaging component, the main transmission shaft, the transmission mechanism and the output shaft. When the second engaging component is switched to be combined with the third driven gear, the power of the engine is sequentially output through the second input shaft, the third driving gear, the third driven gear, the second engaging component, the main transmission shaft, the transmission mechanism and the output shaft. When the second engaging component is switched to be combined with the fourth driven gear, the power of the engine is sequentially output through the second input shaft, the fourth driving gear, the fourth driven gear, the second engaging component, the main transmission shaft, the transmission mechanism and the output shaft. Therefore, by switching the engagement state of the first engagement component, the power transmission of the drive motor can be adjusted to two gears, and by switching the engagement state of the second engagement component, the power transmission of the engine can be adjusted to two gears. Therefore, the transmission gears of the drive motor and the engine can be adjusted according to the vehicle speed, so that the engine and the drive motor always work in the high-efficiency zone, thereby saving electric energy, saving fuel consumption, improving transmission efficiency, and extending the cruising range. In addition, it can also improve the power of the vehicle when starting, accelerating, accelerating suddenly, and climbing, and the structure is simple and compact, with small space size, light weight, low cost, and simple control logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic structural diagram of a four-speed drive system for a hybrid vehicle of the present utility model. DETAILED DESCRIPTION

[0029] 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.

[0030] like Figure 1 As shown, a four-speed drive system for a hybrid vehicle includes a drive motor 1, an engine 2, a first input shaft 3, a second input shaft 4, a main transmission shaft 5, an output shaft 6, a first driving gear 7, a first driven gear 8, a second driving gear 9, a second driven gear 10, a third driving gear 11, a third driven gear 12, a fourth driving gear 13, a fourth driven gear 14, a first coupling component 15, a second coupling component 16 and a transmission mechanism;

[0031] The first input shaft 3, the second input shaft 4, the main transmission shaft 5 and the output shaft 6 are rotatably arranged respectively;

[0032] The driving motor 1 is connected to the first input shaft 3;

[0033] The engine 2 is connected to the second input shaft 4;

[0034] The main transmission shaft 5 is transmission-connected to the output shaft 6 via the transmission mechanism;

[0035] The first driving gear 7 is connected to the first input shaft 3, the first driven gear 8 is loosely sleeved on the main transmission shaft 5, and the first driving gear 7 is meshed with the first driven gear 8;

[0036] The second driving gear 9 is connected to the first input shaft 3, the second driven gear 10 is loosely sleeved on the main transmission shaft 5, and the second driving gear 9 is meshed with the second driven gear 10;

[0037] The third driving gear 11 is connected to the second input shaft 4, the third driven gear 12 is loosely sleeved on the main transmission shaft 5, and the third driving gear 11 is meshed with the third driven gear 12;

[0038] The fourth driving gear 13 is connected to the second input shaft 4, the fourth driven gear 14 is loosely sleeved on the main transmission shaft 5, and the fourth driving gear 13 is meshed with the fourth driven gear 14;

[0039] The first engaging member 15 is disposed on the main transmission shaft 5, and the first engaging member 15 is used to switch to be combined with the first driven gear 8 so that the main transmission shaft 5 and the first driven gear 8 rotate synchronously, and the first engaging member 15 is also used to switch to be combined with the second driven gear 10 so that the main transmission shaft 5 and the second driven gear 10 rotate synchronously, and the first engaging member 15 is also used to switch to neutral gear;

[0040] The second coupling component 16 is arranged on the main transmission shaft 5, and the second coupling component 16 is used to switch to combine with the third driven gear 12 so that the main transmission shaft 5 and the third driven gear 12 rotate synchronously. The second coupling component 16 is also used to switch to combine with the fourth driven gear 14 so that the main transmission shaft 5 and the fourth driven gear 14 rotate synchronously. The second coupling component 16 is also used to switch to neutral.

[0041] Specifically, when the first engaging component 15 is switched to be combined with the first driven gear 8, the power of the driving motor 1 is sequentially output through the first input shaft 3, the first driving gear 7, the first driven gear 8, the first engaging component 15, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the first engaging component 15 is switched to be combined with the second driven gear 10, the power of the driving motor 1 is sequentially output through the first input shaft 3, the second driving gear 9, the second driven gear 10, the first engaging component 15, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the second engaging component 16 is switched to be combined with the third driven gear 12, the power of the engine 2 is sequentially output through the second input shaft 4, the third driving gear 11, the third driven gear 12, the second engaging component 16, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the second engagement component 16 is switched to be combined with the fourth driven gear 14, the power of the engine 2 is output outwardly through the second input shaft 4, the fourth driving gear 13, the fourth driven gear 14, the second engagement component 16, the main transmission shaft 5, the transmission mechanism and the output shaft 6 in sequence. Therefore, by switching the engagement state of the first engagement component 15, the power transmission of the drive motor 1 has two gears that can be adjusted, and by switching the engagement state of the second engagement component 16, the power transmission of the engine 2 has two gears that can be adjusted. Therefore, the transmission gears of the drive motor 1 and the engine 2 can be adjusted according to the vehicle speed, so that the engine 2 and the drive motor 1 always work in the high-efficiency zone, thereby saving electric energy, saving fuel consumption, improving transmission efficiency, and extending the cruising range. In addition, it can also improve the power of the vehicle when starting, accelerating, accelerating suddenly, and climbing, and the structure is simple and compact, with small space size, light weight, low cost, and simple control logic.

[0042] In this embodiment, when the first combination component is switched to be combined with the first driven gear 8 and the second coupling component 16 is switched to neutral, it is a pure electric first gear mode, and when the first combination component is switched to be combined with the second driven gear 10 and the second coupling component 16 is switched to neutral, it is a pure electric second gear mode. When the first combination component is switched to neutral and the second coupling component 16 is switched to be combined with the third driven gear 12, it is a direct drive third gear mode, and when the first combination component is switched to neutral and the second coupling component 16 is switched to be combined with the fourth driven gear 14, it is a direct drive fourth gear mode. When the first combination component is switched to be combined with the first driven gear 8 and the second coupling component 16 is switched to be combined with the third driven gear 12, it is a low-speed parallel mode, and when the first combination component is switched to be combined with the second driven gear 10 and the second coupling component 16 is switched to be combined with the fourth driven gear 14, it is a high-speed parallel mode. Therefore, when the drive motor 1 drives the vehicle alone, it has a pure electric first gear mode and a pure electric second gear mode that can be adjusted; when the engine 2 drives the vehicle alone, it has a direct drive third gear mode and a direct drive fourth gear mode that can be adjusted; when the drive motor 1 and the engine 2 drive the vehicle together, it has a low-speed parallel mode and a high-speed parallel mode that can be adjusted. Therefore, according to the change of vehicle speed, it is possible to realize switching between the pure electric first gear mode, the low-speed parallel mode, the pure electric second gear mode, the high-speed parallel mode, the direct drive third gear mode and the direct drive fourth gear mode.

[0043] In this embodiment, the first engaging component 15 may be a synchronizer, and the second engaging component 16 may be a synchronizer. Of course, in some embodiments, the first engaging component 15 and the second engaging component 16 may also be clutches.

[0044] like Figure 1 As shown, the transmission mechanism may include a fifth gear 17 and a sixth gear 18 , wherein the fifth gear 17 is connected to the main transmission shaft 5 , and the sixth gear 18 is connected to the output shaft 6 , and the fifth gear 17 is meshed with the sixth gear 18 .

[0045] like Figure 1 As shown, the four-speed drive system for the hybrid vehicle may further include a generator 19 and a secondary transmission shaft 20;

[0046] The secondary transmission shaft 20 is rotatably arranged and transmission-connected to the second input shaft 4;

[0047] The generator 19 is connected to the secondary transmission shaft 20 .

[0048] In this embodiment, the auxiliary transmission shaft 20 is connected to a seventh gear 21, and the seventh gear 21 is engaged with the fourth driving gear 13, thereby connecting the auxiliary transmission shaft 20 to the second input shaft 4 in a transmission manner; specifically, when the engine 2 drives the second input shaft 4 to rotate, it can drive the auxiliary transmission shaft 20 to rotate, and thereby drive the generator 19 to work.

[0049] like Figure 1 As shown, the drive motor 1 and the first input shaft 3, the engine 2 and the second input shaft 4, and the generator 19 and the auxiliary transmission shaft 20 can be connected respectively through a spline 22; in this embodiment, the engine 2 is also connected to the second input shaft 4 through a one-way clutch 23.

[0050] In this embodiment, the speed ratio of the first driving gear 7 to the first driven gear 8 is greater than the speed ratio of the second driving gear 9 to the second driven gear 10, and the speed ratio of the third driving gear 11 to the third driven gear 12 is greater than the speed ratio of the fourth driving gear 13 to the fourth driven gear 14.

[0051] In summary, when the first coupling component 15 is switched to be combined with the first driven gear 8, the power of the driving motor 1 is sequentially output through the first input shaft 3, the first driving gear 7, the first driven gear 8, the first coupling component 15, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the first coupling component 15 is switched to be combined with the second driven gear 10, the power of the driving motor 1 is sequentially output through the first input shaft 3, the second driving gear 9, the second driven gear 10, the first coupling component 15, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the second coupling component 16 is switched to be combined with the third driven gear 12, the power of the engine 2 is sequentially output through the second input shaft 4, the third driving gear 11, the third driven gear 12, the second coupling component 16, the main transmission shaft 5, the transmission mechanism and the output shaft 6. When the second engagement component 16 is switched to be combined with the fourth driven gear 14, the power of the engine 2 is output outwardly through the second input shaft 4, the fourth driving gear 13, the fourth driven gear 14, the second engagement component 16, the main transmission shaft 5, the transmission mechanism and the output shaft 6 in sequence. Therefore, by switching the engagement state of the first engagement component 15, the power transmission of the drive motor 1 has two gears that can be adjusted, and by switching the engagement state of the second engagement component 16, the power transmission of the engine 2 has two gears that can be adjusted. Therefore, the transmission gears of the drive motor 1 and the engine 2 can be adjusted according to the vehicle speed, so that the engine 2 and the drive motor 1 always work in the high-efficiency zone, thereby saving electric energy, saving fuel consumption, improving transmission efficiency, and extending the cruising range. In addition, it can also improve the power of the vehicle when starting, accelerating, accelerating suddenly, and climbing, and the structure is simple and compact, with small space size, light weight, low cost, and simple control logic.

[0052] 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 four-speed drive system for a hybrid vehicle, characterized in that: It comprises a driving motor (1), an engine (2), a first input shaft (3), a second input shaft (4), a main transmission shaft (5), an output shaft (6), a first driving gear (7), a first driven gear (8), a second driving gear (9), a second driven gear (10), a third driving gear (11), a third driven gear (12), a fourth driving gear (13), a fourth driven gear (14), a first engaging component (15), a second engaging component (16) and a transmission mechanism; The first input shaft (3), the second input shaft (4), the main transmission shaft (5) and the output shaft (6) are rotatably arranged respectively; The driving motor (1) is connected to the first input shaft (3); The engine (2) is connected to the second input shaft (4); The main transmission shaft (5) is transmission-connected to the output shaft (6) via the transmission mechanism; The first driving gear (7) is connected to the first input shaft (3), the first driven gear (8) is loosely sleeved on the main transmission shaft (5), and the first driving gear (7) is meshed with the first driven gear (8); The second driving gear (9) is connected to the first input shaft (3), the second driven gear (10) is loosely sleeved on the main transmission shaft (5), and the second driving gear (9) is meshed with the second driven gear (10); The third driving gear (11) is connected to the second input shaft (4), the third driven gear (12) is loosely sleeved on the main transmission shaft (5), and the third driving gear (11) is meshed with the third driven gear (12); The fourth driving gear (13) is connected to the second input shaft (4), the fourth driven gear (14) is loosely sleeved on the main transmission shaft (5), and the fourth driving gear (13) is meshed with the fourth driven gear (14); The first engaging component (15) is arranged on the main transmission shaft (5), and the first engaging component (15) is used to switch to be combined with the first driven gear (8) so that the main transmission shaft (5) and the first driven gear (8) rotate synchronously, and the first engaging component (15) is also used to switch to be combined with the second driven gear (10) so that the main transmission shaft (5) and the second driven gear (10) rotate synchronously, and the first engaging component (15) is also used to switch to neutral gear; The second engaging component (16) is arranged on the main transmission shaft (5), and the second engaging component (16) is used to switch to be combined with the third driven gear (12) so that the main transmission shaft (5) and the third driven gear (12) rotate synchronously. The second engaging component (16) is also used to switch to be combined with the fourth driven gear (14) so ​​that the main transmission shaft (5) and the fourth driven gear (14) rotate synchronously. The second engaging component (16) is also used to switch to neutral gear.

2. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The first engaging component (15) is a synchronizer or a clutch.

3. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The second engagement component (16) is a synchronizer or a clutch.

4. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The transmission mechanism comprises a fifth gear (17) and a sixth gear (18); The fifth gear (17) is connected to the main transmission shaft (5), the sixth gear (18) is connected to the output shaft (6), and the fifth gear (17) is meshed with the sixth gear (18).

5. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: Also includes a generator (19) and a secondary transmission shaft (20); The auxiliary transmission shaft (20) is rotatably arranged and is drivingly connected to the second input shaft (4); The generator (19) is connected to the auxiliary transmission shaft (20).

6. The four-speed drive system for a hybrid vehicle according to claim 5, characterized in that: The secondary transmission shaft (20) is connected to a seventh gear (21), and the seventh gear (21) is meshed with the fourth driving gear (13).

7. The four-speed drive system for a hybrid vehicle according to claim 5, characterized in that: The drive motor (1) and the first input shaft (3), the engine (2) and the second input shaft (4), and the generator (19) and the auxiliary transmission shaft (20) are respectively connected via splines (22).

8. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The engine (2) is connected to the second input shaft (4) via a one-way clutch (23).

9. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The speed ratio between the first driving gear (7) and the first driven gear (8) is greater than the speed ratio between the second driving gear (9) and the second driven gear (10).

10. The four-speed drive system for a hybrid vehicle according to claim 1, characterized in that: The speed ratio between the third driving gear (11) and the third driven gear (12) is greater than the speed ratio between the fourth driving gear (13) and the fourth driven gear (14).

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