Single-gear hybrid power driving system and vehicle

Abstract

The utility model discloses a single-gear hybrid power driving system and a vehicle. The single-gear hybrid power driving system comprises an engine, a first motor, a second motor, a transmission and a differential mechanism, and the transmission comprises a transmission input shaft, a transmission output shaft, a conical clutch, a first reduction gear assembly, a second reduction gear assembly, a third reduction gear assembly and a fourth reduction gear assembly. The first reduction gear assembly is used for outputting driving force of the first motor to the transmission input shaft; the second reduction gear assembly is used for transmitting power of the engine and the first motor to the transmission output shaft; the conical clutch is used for controlling whether power of the engine and the first motor is transmitted to the transmission output shaft; the third reduction gear assembly is used for outputting the driving force of the second motor to the transmission output shaft; the fourth reduction gear assembly is used for transmitting power from the transmission output shaft to the differential mechanism. The conical clutch is adopted to replace a multi-disc clutch, so that the manufacturing cost of a vehicle is reduced.

Description

Technical Field

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

[0002] A hybrid vehicle is a vehicle that uses more than one energy source, usually a conventional engine (ICE) using liquid fuel and an electric motor using electrical energy to propel the vehicle. A hybrid vehicle can operate in a variety of driving modes, but the battery capacity is limited and it relies primarily on engine combustion for power.

[0003] The dual-motor P1+P3 hybrid is the mainstream solution for hybrid power structure at this stage. For example, the patent number ZL202011401359.1 discloses a dual-motor hybrid power drive device, which switches between pure electric, series, parallel, and engine direct drive force modes through the disengagement and coupling device inside the reducer, so that the drive motor and the engine can work in the high-efficiency zone for a long time, improve the working efficiency, increase the vehicle's power, and improve the vehicle's fuel economy, so as to achieve the purpose of fuel saving and emission reduction. However, the disengagement and coupling device of the dual-motor hybrid power drive device mostly adopts a multi-plate clutch, which has a high cost and increases the cost of the overall equipment. In addition, the transmission chain of the output shaft of the reducer requires three transmission gears for transmission, which requires more axial space layout, which is not conducive to the miniaturization design of the equipment. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a low-cost single-speed hybrid power drive system and a vehicle.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A single-speed hybrid drive system includes an engine, a first motor, a second motor, a transmission and a differential, wherein the transmission includes: a transmission input shaft connected to the output shaft of the engine; a first reduction gear assembly connected to the first motor and used to output the driving force of the first motor to the transmission input shaft; a transmission output shaft; a second reduction gear assembly connected to the transmission output shaft and used to transmit the power of the engine and the first motor to the transmission output shaft; a cone clutch arranged on the transmission input shaft and used to control whether the power of the engine and the first motor is transmitted to the transmission output shaft; a third reduction gear assembly connected to the second motor and used to output the driving force of the second motor to the transmission output shaft; and a fourth reduction gear assembly connected to the transmission output shaft and used to transmit power from the transmission output shaft to the differential.

[0007] Preferably, the first reduction gear assembly includes: a first motor driving gear connected to the first motor output shaft; and a first motor driven gear disposed on the transmission input shaft and meshing with the first motor driving gear.

[0008] Preferably, the second reduction gear assembly includes: an engine direct-drive driving gear, which is loosely mounted on the transmission input shaft; an engine output gear, which is arranged on the transmission output shaft and meshes with the engine direct-drive driving gear; and a cone clutch is coupled or separated with the engine direct-drive driving gear to control whether the power of the engine and the first motor is transmitted to the transmission output shaft.

[0009] Preferably, the conical clutch includes a clutch outer cone, a fixing mechanism and a driving mechanism, wherein the fixing mechanism is fixedly arranged on the transmission input shaft, the clutch outer cone is movably arranged on the transmission input shaft and is connected to the fixing mechanism through the driving mechanism, and the driving mechanism is used to drive the clutch outer cone to move and engage with or disengage from the engine direct-drive driving gear.

[0010] Preferably, the fixing mechanism includes an L-shaped retaining ring and a retaining spring, the L-shaped retaining ring is sleeved on the transmission input shaft and fixed by the retaining spring, a needle bearing is provided on the outer side of the L-shaped retaining ring, and the engine direct-drive driving gear is sleeved on the outer side of the L-shaped retaining ring through a needle bearing; an inner cone ring is provided on the engine direct-drive driving gear, and the driving mechanism drives the outer cone of the clutch to move and engage with or separate from the inner cone ring to control whether the power of the engine and the first motor is transmitted to the transmission output shaft.

[0011] Preferably, the driving mechanism includes: a spring, one end of which is connected to the fixing mechanism and the other end is connected to the clutch outer cone, and is used to drive the clutch outer cone to move and separate from the engine direct-drive driving gear; a piston, which is arranged on a side of the clutch outer cone away from the fixing mechanism, and is used to drive the clutch outer cone to move and engage with the engine direct-drive driving gear.

[0012] Preferably, the third reduction gear assembly includes: a second motor driving gear connected to the second motor output shaft; and a second motor driven gear disposed on the transmission output shaft and meshing with the second motor driving gear.

[0013] Preferably, the fourth reduction gear assembly includes: a differential gear connected to the differential; and an output intermediate shaft gear disposed on the transmission output shaft and meshing with the differential gear.

[0014] A vehicle comprises the above-mentioned single-speed hybrid power drive system.

[0015] The beneficial technical effect of the utility model is that the above-mentioned single-speed hybrid power drive system adopts a cone clutch to replace the more expensive multi-plate clutch in the prior art, thereby reducing the manufacturing cost of the single-speed hybrid power drive system and further reducing the manufacturing cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a single-speed hybrid power drive system in one embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of a single-speed hybrid power drive system in one embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the assembly of a cone clutch and an engine direct drive driving gear in one embodiment of the utility model;

[0019] Figure 4 It is a schematic structural diagram of a single-speed hybrid power drive system in another embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1-engine, 2-engine direct drive driving gear, 3-cone clutch, 4-first motor driving gear, 41-first motor driven gear, 5-first motor, 51-first motor output shaft, 6-transmission input shaft, 7-transmission output shaft, 71-second motor driven gear, 72-output intermediate shaft gear, 8-second motor, 81-second motor output shaft, 9-differential; 91-differential gear, 10-second motor driving gear, 11, engine output gear, 12, retaining ring, 13-needle bearing end face retaining ring, 14-needle bearing, 15-L-type retaining ring, 16-spring, 17-clutch outer cone, 18-piston. DETAILED DESCRIPTION

[0022] In order to enable ordinary technicians in the field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below in conjunction with the accompanying drawings and embodiments.

[0023] The utility model provides a single-speed hybrid power driving system.

[0024] like Figure 1-3As shown, in one embodiment of the utility model, the single-speed hybrid drive system includes an engine 1, a first motor 5, a second motor 8, a transmission and a differential 9, and the transmission includes a transmission input shaft 6, a transmission output shaft 7, a cone clutch 3, a first reduction gear assembly, a second reduction gear assembly, a third reduction gear assembly and a fourth reduction gear assembly. The transmission input shaft 6 is connected to the output shaft of the engine 1; the first reduction gear assembly is connected to the first motor 5, and is used to output the driving force of the first motor 5 to the transmission input shaft 6; the second reduction gear assembly is connected to the transmission output shaft 7, and is used to transmit the power of the engine 1 and the first motor 5 to the transmission output shaft 7; the cone clutch 3 is arranged on the transmission input shaft 6, and is used to control whether the power of the engine 1 and the first motor 5 is transmitted to the transmission output shaft 7; the third reduction gear assembly is connected to the second motor 8, and is used to output the driving force of the second motor 8 to the transmission output shaft 7; the fourth reduction gear assembly is connected to the transmission output shaft 7, and is used to transmit the power from the transmission output shaft 7 to the differential 9.

[0025] The single-speed hybrid power drive system in this embodiment uses a cone clutch to replace the more expensive multi-plate clutch in the prior art, thereby reducing the manufacturing cost of the single-speed hybrid power drive system and further reducing the manufacturing cost of the vehicle.

[0026] Preferably, in this embodiment, the first reduction gear assembly includes a first motor driving gear 4 and a first motor driven gear 41, the first motor driving gear 4 is connected to the first motor output shaft 51, and the first motor driven gear 41 is arranged on the transmission input shaft 6 and meshes with the first motor driving gear 4.

[0027] Preferably, in this embodiment, the second reduction gear assembly includes an engine direct drive driving gear 2 and an engine output gear 11, the engine direct drive driving gear 2 is loosely sleeved on the transmission input shaft 6, the engine output gear 11 is arranged on the transmission output shaft 7 and meshes with the engine direct drive driving gear 2, and the cone clutch 3 is combined or separated with the engine direct drive driving gear 2 to control whether the power of the engine 1 and the first motor 5 is transmitted to the transmission output shaft 7. The third reduction gear assembly includes a second motor driving gear 10 connected to the second motor output shaft 81, and the second motor driving gear 10 is meshed with the engine output gear 11. In this embodiment, the engine output gear 11 is meshed with the engine direct drive driving gear 2 and the second motor driving gear 10 for transmission, so that one transmission gear is reduced on the transmission output shaft 7, the transmission structure arrangement is simpler and more reliable, the axial space is shorter, and it is conducive to the miniaturization design of the equipment.

[0028] Preferably, in this embodiment, the fourth reduction gear assembly includes a differential gear 91 and an output intermediate shaft gear 72 , the differential gear 91 is connected to the differential 9 , and the output intermediate shaft gear 72 is arranged on the transmission output shaft 7 and meshes with the differential gear 91 .

[0029] Preferably, in this embodiment, the conical clutch 3 includes a clutch outer cone 17, a fixing mechanism and a driving mechanism, the fixing mechanism is fixedly arranged on the transmission input shaft 6, the clutch outer cone 17 is movably arranged on the transmission input shaft 6 and is connected to the fixing mechanism through the driving mechanism, and the driving mechanism is used to drive the clutch outer cone 17 to move and engage with or disengage from the engine direct-drive driving gear 2.

[0030] In this embodiment, the fixing mechanism includes an L-shaped retaining ring 15 and a retaining spring 12. The L-shaped retaining ring 15 is sleeved on the transmission input shaft 6 and fixed by the retaining spring 12. A needle bearing 14 is provided on the outside of the L-shaped retaining ring 15. The engine direct-drive driving gear 2 is sleeved on the outside of the L-shaped retaining ring 15 through the needle bearing 14; an inner cone ring 21 is provided on the engine direct-drive driving gear 2, and the driving mechanism drives the clutch outer cone 17 to move and engage with or separate from the inner cone ring 21 to control whether the power of the engine 1 and the first motor 5 is transmitted to the transmission output shaft 7.

[0031] In this embodiment, the driving mechanism includes a spring 16 and a piston 18. One end of the spring 16 is connected to the fixing mechanism, and the other end is connected to the clutch outer cone 17. The spring 16 is used to drive the clutch outer cone 17 to move and separate from the engine direct drive driving gear 2; the piston 18 is arranged on the side of the clutch outer cone 17 away from the fixing mechanism, and is used to drive the clutch outer cone 17 to move and engage with the engine direct drive driving gear 2.

[0032] Figure 1 The single-speed hybrid drive system in the illustrated embodiment can realize 6 operating modes as shown in Table 1: idle charging, pure electric drive, series drive, parallel drive, engine direct drive, and energy recovery. The "√" in Table 1 represents starting and outputting power to the outside of the transmission or the clutch is closed, "o" represents starting but not outputting power to the outside of the transmission, and "×" represents not starting or the clutch is open.

[0033] Table 1:

[0034]

[0035] Pure electric drive:

[0036] The second motor 8 outputs power to the transmission output shaft 7 through the second motor driving gear 10 and the engine output gear 11, and then the engine output gear 11 and the differential gear 91 are meshed and driven to achieve power output and pure electric drive.

[0037] When the motor is driven in pure electric mode, the vehicle can quickly go into reverse gear by reversing the motor (changing the driving direction).

[0038] Series drive:

[0039] The cone clutch 3 is opened, and the engine 1 transmits power to the first motor output shaft 51 through the transmission input shaft 6. The first motor output shaft 51 is fixedly connected to the first motor 5 to convert mechanical energy into the electrical energy required by the first motor 1. At the same time, the second motor 8 is connected to the transmission output shaft 7 through the second motor driving gear 10 and the engine output gear 11, and finally converts the electrical energy into mechanical power at the wheel end through the differential 9.

[0040] Parallel drive:

[0041] The cone clutch 3 is a normally open clutch. When not working, the L-shaped retaining ring 15 separates the clutch outer cone 17 from the inner cone ring 21 of the engine direct drive driving gear 2 through the spring 16 and the piston 18. The engine direct drive driving gear 2 is emptied on the transmission input shaft 6 through the needle bearing 14 and the L-shaped retaining ring 15, and there is no power output. The L-shaped retaining ring 15 is fixed to the transmission input shaft 6 through the retaining ring 12. When working, the oil enters the piston 18 through the oil channel of the transmission input shaft 6, and the piston 18 is pressurized. The piston 18 pushes the clutch outer cone 17 to combine with the inner cone ring 21 on the engine direct drive driving gear 2. The power of the transmission input shaft 6 can be output through the engine direct drive driving gear 2, and the engine power is output to the transmission output shaft 7 through the engine output gear 11. At the same time, the second motor 8 outputs power to the transmission output shaft 7 through the second motor driving gear 10 and the engine output gear 11. Finally, the engine output gear 11 and the differential gear 91 are meshed and driven to achieve parallel drive.

[0042] Engine (ICE) direct drive:

[0043] The cone clutch 3 is closed, and the engine power is output to the transmission output shaft 7 through the engine direct drive driving gear 2 and the engine output gear 11, and then the engine output gear 11 and the differential gear 91 are meshed and transmitted to realize power output and direct drive.

[0044] Figure 4 A schematic structural diagram of a single-speed hybrid power drive system in another embodiment of the utility model is shown. Figure 4 The single-speed hybrid drive system in the illustrated embodiment is Figure 1The structures of the single-speed hybrid drive systems in the illustrated embodiments are basically the same, except that the second motor driving gear 10 is not meshed with the engine output gear 11, but a second motor driven gear 71 is additionally provided on the transmission output shaft 7, and the second motor driving gear 10 is meshed with the second motor driven gear 71. The single-speed hybrid drive system in this embodiment uses a cone clutch to replace the multi-plate clutch with a relatively high cost in the prior art, thereby reducing the manufacturing cost of the single-speed hybrid drive system and thus reducing the manufacturing cost of the vehicle.

[0045] The utility model also provides a vehicle, which includes the above-mentioned single-speed hybrid power drive system. The single-speed hybrid power drive system uses a cone clutch to replace the multi-plate clutch with higher cost in the prior art, thereby reducing the manufacturing cost of the single-speed hybrid power drive system and further reducing the manufacturing cost of the vehicle.

[0046] The above description is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the utility model.

Claims

1. A single-speed hybrid drive system, characterized in that: The invention comprises an engine, a first motor, a second motor, a transmission and a differential, wherein the transmission comprises: a transmission input shaft connected to an output shaft of the engine; a first reduction gear assembly connected to the first motor and configured to output the driving force of the first motor to the transmission input shaft; Transmission output shaft; a second reduction gear assembly connected to the transmission output shaft and used to transmit power from the engine and the first motor to the transmission output shaft; a cone clutch, which is arranged on the transmission input shaft and is used to control whether the power of the engine and the first motor is transmitted to the transmission output shaft; a third reduction gear assembly connected to the second motor and configured to output the driving force of the second motor to the transmission output shaft; The fourth reduction gear assembly is connected to the transmission output shaft and is used for transmitting power from the transmission output shaft to the differential.

2. The single-speed hybrid drive system according to claim 1, characterized in that: The first reduction gear assembly comprises: A first motor driving gear connected to the first motor output shaft; The first motor driven gear is disposed on the transmission input shaft and meshes with the first motor driving gear.

3. The single-speed hybrid drive system according to claim 1, characterized in that: The second reduction gear assembly comprises: The engine directly drives the driving gear, which is loosely mounted on the transmission input shaft; An engine output gear, which is disposed on the transmission output shaft and meshes with the engine direct drive driving gear; Whether the power of the engine and the first motor is transmitted to the transmission output shaft is controlled by engaging or disengaging the cone clutch with the engine direct drive gear.

4. The single-speed hybrid drive system according to claim 3, characterized in that: The cone clutch includes a clutch outer cone, a fixing mechanism and a driving mechanism. The fixing mechanism is fixedly arranged on the transmission input shaft. The clutch outer cone is movably arranged on the transmission input shaft and is connected to the fixing mechanism through the driving mechanism. The driving mechanism is used to drive the clutch outer cone to move and engage with or disengage from the engine direct drive gear.

5. The single-speed hybrid drive system according to claim 4, characterized in that: The fixing mechanism includes an L-shaped retaining ring and a retaining spring. The L-shaped retaining ring is sleeved on the transmission input shaft and fixed by the retaining spring. A needle bearing is arranged on the outer side of the L-shaped retaining ring. The engine direct-drive driving gear is sleeved on the outer side of the L-shaped retaining ring through the needle bearing. An inner cone ring is arranged on the engine direct-drive driving gear. The driving mechanism drives the clutch outer cone to move and engage with or separate from the inner cone ring to control whether the power of the engine and the first motor is transmitted to the transmission output shaft.

6. The single-speed hybrid drive system according to claim 4 or 5, characterized in that: The driving mechanism comprises: A spring, one end of which is connected to the fixing mechanism and the other end of which is connected to the clutch outer cone, for driving the clutch outer cone to move and separate from the engine direct drive gear; The piston is arranged on a side of the clutch outer cone away from the fixing mechanism and is used to drive the clutch outer cone to move and engage with the engine direct drive gear.

7. The single-speed hybrid drive system according to claim 1, characterized in that: The third reduction gear assembly comprises: A second motor driving gear connected to an output shaft of the second motor; The second motor driven gear is disposed on the transmission output shaft and meshes with the second motor driving gear.

8. The single-speed hybrid drive system according to claim 3, characterized in that: The third reduction gear assembly includes a second motor driving gear connected to the second motor output shaft, and the second motor driving gear is meshed with the engine output gear.

9. The single-speed hybrid drive system according to claim 1, characterized in that: The fourth reduction gear assembly comprises: a differential gear connected to the differential; An output intermediate shaft gear is disposed on the transmission output shaft and meshes with the differential gear.

10. A vehicle, characterized in that: The vehicle includes a single-speed hybrid drive system as described in any one of claims 1-9.

Images