Hybrid gearbox structure

Abstract

The hybrid gearbox structure comprises an engine, a motor, a gearbox body and a differential mechanism, the gearbox body comprises an input shaft and an output shaft, the input shaft is connected with a duplex clutch, the duplex clutch is connected with the engine and the motor, and the output shaft is connected with the differential mechanism. According to the hybrid gearbox structure, the engine and the motor can provide power simultaneously or independently through the duplex clutch, so that higher acceleration performance and higher efficiency are improved, the hybrid gearbox structure is high in transmission efficiency, high in fuel efficiency, good in fuel economy, good in vehicle gear shifting acceleration smoothness and good in acceleration experience, gear shifting impact is avoided, and the service life of the hybrid gearbox structure is prolonged. And the performance and the environmental protection property of the vehicle are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the field of hybrid transmissions, and in particular, relates to a hybrid transmission structure. Background Art

[0002] A hybrid transmission is a transmission used in hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV). It combines the advantages of traditional internal combustion engines and electric motors to achieve higher fuel efficiency and lower emissions. The design and working principle of hybrid transmissions are different from traditional transmissions. There are mainly the following types: series hybrid transmissions, parallel hybrid transmissions, and compound hybrid transmissions. In a series hybrid transmission, the internal combustion engine is mainly used for power generation, while the electric motor directly drives the vehicle. There is no mechanical connection between the internal combustion engine and the electric motor, and the electric motor is responsible for providing power; in a parallel hybrid transmission, the internal combustion engine and the electric motor can drive the vehicle simultaneously or separately. The transmission is able to combine the power of the two to provide stronger acceleration performance and higher efficiency; in a compound hybrid transmission, the characteristics of series and parallel are combined, allowing the internal combustion engine and the electric motor to cooperate flexibly to optimize power output and fuel efficiency.

[0003] In the prior art, parallel hybrid transmissions are the main type, but the parallel hybrid transmissions in the prior art have a complex structure, low transmission efficiency, low fuel efficiency, poor fuel economy, poor vehicle gear shifting and acceleration smoothness, poor acceleration experience, and large gear shifting shock.

[0004] Therefore, we continue to develop a hybrid transmission structure with simple structure, high transmission efficiency, high fuel efficiency, good fuel economy, smooth vehicle gear shifting and acceleration, good acceleration experience, avoiding gear shifting shock, and effectively improving vehicle performance and environmental protection. Summary of the invention

[0005] The present invention is made to solve the above problems, and aims to provide a hybrid transmission structure with simple structure, high transmission efficiency, high fuel efficiency, good fuel economy, good vehicle gear shifting and acceleration smoothness, good acceleration experience, avoiding gear shifting shock, and being able to effectively improve vehicle performance and environmental protection. In order to achieve the above objectives, the technical solutions adopted by the present invention are:

[0006] The present invention provides a hybrid transmission structure having the following characteristics: it includes an engine, an electric motor, a transmission body and a differential; the transmission body includes an input shaft and an output shaft; the input shaft is connected to a dual clutch, the dual clutch is connected to the engine and the electric motor, and the output shaft is connected to the differential.

[0007] The hybrid transmission structure provided by the present invention may also have such a feature that the dual clutch includes a first clutch and a second clutch, the first clutch is connected to the engine, and the second clutch is connected to the motor.

[0008] In the hybrid transmission structure provided by the present invention, it can also have such a feature that a planetary row is provided at one end of the input shaft away from the dual clutch, the planetary row includes a sun gear, planetary gears, an inner ring gear and a planet carrier, the sun gear is meshed with the planetary gears, the planetary gears are meshed with the inner ring gears, the planetary gears are connected to the planet carrier, the inner ring gear is connected to the input shaft, and the planet carrier is connected to the output shaft.

[0009] The hybrid transmission structure provided by the present invention may also have such a feature that a third clutch is provided on a side of the planetary gearbox away from the transmission body, and the third clutch is connected to the sun gear.

[0010] In the hybrid transmission structure provided by the present invention, it can also have such a feature that the transmission body also includes a 1+2 gear set, the 1+2 gear set includes a first driving gear, a first driven gear and a first combining tooth, the first driving gear is sleeved on the input shaft, the first driven gear is sleeved on the output shaft, and the first combining tooth is located between the first driving gear and the first driven gear.

[0011] The hybrid transmission structure provided by the present invention may also have the following characteristics: a first synchronizer and a second synchronizer are provided on the output shaft, the first synchronizer is located on a side close to the 1+2 gear set, and the second synchronizer is located on a side away from the 1+2 gear set.

[0012] In the hybrid transmission structure provided by the present invention, it can also have such a feature that the transmission body also includes a 3+4 gear set, the 3+4 gear set includes a second driving gear, a second driven gear and a second combining tooth, the second driving gear is sleeved on the input shaft, the second driven gear is sleeved on the output shaft, and the second combining tooth is located on one side of the second driving gear.

[0013] The hybrid transmission structure provided by the present invention may also have the following feature: a third synchronizer is provided on the input shaft, and the third synchronizer is located on the side of the 3+4 gear set away from the planetary gear set.

[0014] In the hybrid transmission structure provided by the present invention, it can also have such a feature that a differential gear set is provided between the differential and the output shaft, the differential gear set includes a third driving gear and a third driven gear, the third driving gear is sleeved on the output shaft, the third driven gear is connected to the differential, and the third driving gear and the third driven gear are meshed.

[0015] The technical effect of the present invention is as follows: the hybrid transmission structure provided by the present invention includes an engine, an electric motor, a transmission body and a differential, the transmission body includes an input shaft and an output shaft, the input shaft is connected with a dual clutch, the dual clutch is connected with the engine and the electric motor, the output shaft is connected with the differential, the dual clutch enables the engine and the electric motor to provide power simultaneously or individually, thereby improving stronger acceleration performance and higher efficiency, so that the hybrid transmission structure provided by the present invention has high transmission efficiency, high fuel efficiency, good fuel economy, good vehicle gear shifting and acceleration smoothness, good acceleration experience, avoids gear shifting shock, and effectively improves the performance and environmental protection of the vehicle.

[0016] Therefore, the hybrid transmission provided by the present invention has a simple structure, high transmission efficiency, high fuel efficiency, good fuel economy, smooth vehicle gear shifting and acceleration, good acceleration experience, avoids gear shifting shock, and can effectively improve the performance and environmental protection of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, which show the following contents:

[0018] Figure 1 is a simplified diagram of power transmission of a hybrid transmission structure in an embodiment of the present invention;

[0019] Figure 2 is a simplified diagram of power transmission of a hybrid transmission structure in the first gear in an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of power transmission of a hybrid transmission structure under second gear power in an embodiment of the present invention;

[0021] Figure 4 is a simplified diagram of power transmission of a hybrid transmission structure under third gear power in an embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of power transmission of a hybrid transmission structure under four-speed power in an embodiment of the present invention;

[0023] Figure 6This is a schematic diagram of the power transmission of the hybrid transmission structure under two-speed drive in an embodiment of the present invention. The following are marked in the figure: engine-10, motor-20, transmission body-30, input shaft-31, output shaft-32, planetary gear-33, sun gear-331, planetary gear-332, inner ring gear-333, planetary carrier-334, 1+2 gear set-34, first driving gear-341, first driven gear-342, first combined gear-343, 3+4 gear set-35, second driving gear-351, second driven gear-352, second combined gear-353, differential-40, differential gear set-41, third driving gear-411, third driven gear-412, dual clutch-50, first clutch-51, second clutch-52, third clutch-60, first synchronizer-70, second synchronizer-80, third synchronizer-90. DETAILED DESCRIPTION

[0024] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0025] Figure 1 1 is a simplified diagram of power transmission of a hybrid transmission structure in an embodiment of the present invention.

[0026] like Figure 1 As shown, the hybrid transmission structure provided by the present invention includes an engine 10, an electric motor 20, a transmission body 30 and a differential 40. The transmission body 30 includes an input shaft 31 and an output shaft 32. The input shaft 31 is connected with a dual clutch 50. The dual clutch 50 is connected to the engine 10 and the electric motor 20. The output shaft 32 is connected to the differential 40. The dual clutch 50 enables the engine 10 and the electric motor 20 to provide power simultaneously or individually, thereby improving stronger acceleration performance and higher efficiency, so that the hybrid transmission structure provided by the present invention has high transmission efficiency, high fuel efficiency, good fuel economy, good vehicle gear shifting and acceleration smoothness, good acceleration experience, avoids gear shifting shock, and effectively improves the performance and environmental protection of the vehicle.

[0027] The dual clutch 50 includes a first clutch 51 and a second clutch 52. The first clutch 51 is connected to the engine 10 and can connect or disconnect the engine 10 with the transmission body 30. The second clutch 52 is connected to the motor 20 and can connect or disconnect the motor 20 with the transmission body 30.

[0028] A planetary row 33 is provided at one end of the input shaft 31 away from the dual clutch 50. The planetary row 33 includes a sun gear 331, planetary gears 332, an inner ring gear 333 and a planet carrier 334. The sun gear 331 is meshed with the planetary gears 332, the planetary gears 332 are meshed with the inner ring gear 333, the planetary gears 332 are connected to the planet carrier 334, the inner ring gear 333 is connected to the input shaft 31, and the planet carrier 334 is connected to the output shaft 32. A third clutch 60 is provided on the side of the planetary row 33 away from the gearbox body 30, and the third clutch 60 is connected to the sun gear 331.

[0029] The gearbox body 30 also includes a 1+2 gear set 34, which includes a first driving gear 341, a first driven gear 342 and a first combining tooth 343. The first driving gear 341 is sleeved on the input shaft 31, the first driven gear 342 is sleeved on the output shaft 32, and the first combining tooth 343 is located between the first driving gear 341 and the first driven gear 342. The first driving gear 341 and the first driven gear 342 can be connected through the first combining tooth 342.

[0030] The output shaft 32 is provided with a first synchronizer 70 and a second synchronizer 80 . The first synchronizer 70 is located on a side close to the 1+2 gear set 34 and can be connected to the first combining tooth 343 . The second synchronizer 80 is located on a side away from the 1+2 gear set 34 .

[0031] The gearbox body 30 also includes a 3+4 gear set 35, which includes a second driving gear 351, a second driven gear 352 and a second combining tooth 353. The second driving gear 351 is sleeved on the input shaft 31, and the second driven gear 352 is sleeved on the output shaft 32. The second driving gear 351 is meshed with the second driven gear 352, and the second combining tooth 353 is located on one side of the second driving gear 351. The second synchronizer 80 can be connected to the second driven gear 352 of the 3+4 gear set 35. A third synchronizer 90 is provided on the input shaft 31. The third synchronizer 90 is located on the side of the 3+4 gear set 35 away from the planetary row 33, and the third synchronizer 90 can be connected to the second combining tooth 353.

[0032] A differential gear set 41 is provided between the differential 40 and the output shaft 32. The differential gear set 41 includes a third driving gear 411 and a third driven gear 412. The third driving gear 411 is sleeved on the output shaft 32. The third driven gear 412 is connected to the differential 40. The third driving gear 411 and the third driven gear 412 are meshed.

[0033] Figure 2 It is a simplified diagram of power transmission of the hybrid transmission structure in the first gear in an embodiment of the present invention.

[0034] like Figure 2 As shown, in the first gear power mode, the second clutch 52 is closed, the first synchronizer 70 is closed, and the torque of the motor 20 is transmitted to the differential 40 via the 1+2 gear set 34. At the same time, the first clutch 51 can be closed to connect the power of the engine 10 in series.

[0035] Figure 3 It is a simplified diagram of power transmission of the hybrid transmission structure under second gear power in an embodiment of the present invention.

[0036] like Figure 3 As shown, in the second gear power mode, the second clutch 52 is closed, the third clutch 60 is closed, the first synchronizer 70 is closed, the third synchronizer 90 is closed, the torque of the motor 20 is transmitted through the inner shaft of the input shaft 31 to the planetary gear 33, the sun gear 331 is fixed, the power is output to the output shaft 32 through the planetary carrier 334, and finally output to the differential 40 through the 1+2 gear set 34. At the same time, the first clutch 51 can be closed to connect the power of the engine 10 in series.

[0037] Figure 4 It is a simplified diagram of power transmission of the hybrid transmission structure under third gear power in an embodiment of the present invention.

[0038] like Figure 4 As shown, in the third gear power mode, the second clutch 52 is closed, the second synchronizer 80 is closed, and the third synchronizer 90 is closed. The torque of the motor 20 is transmitted to the 3+4 gear set 35 through the external shaft of the input shaft 31, and then output to the differential 40 through the second synchronizer 80. At the same time, it can be closed by the first clutch 51, and the power of the engine 10 is connected in series.

[0039] Figure 5 It is a simplified diagram of power transmission of the hybrid transmission structure under four-speed power in an embodiment of the present invention.

[0040] like Figure 5 As shown, in the fourth gear power mode, the second clutch 52 is closed, the second synchronizer 80, the torque of the motor 20 is transmitted through the inner shaft of the input shaft 31 to the planetary gear 33, the sun gear 331 is fixed, the power is output through the planetary carrier 334, and finally output to the differential 40 through the 3+4 gear set 35. At the same time, the first clutch 51 can be closed to connect the power of the engine 10 in series.

[0041] Figure 6 It is a simplified diagram of power transmission of the hybrid transmission structure under two-speed driving in an embodiment of the present invention.

[0042] like Figure 6 As shown, if only two-speed driving is required in actual conditions, the cost can be reduced by removing the structure of the 3+4-speed gear set 35 .

[0043] Therefore, the hybrid transmission structure provided by the present invention is compact, which is beneficial to reducing the structural volume of the hybrid transmission, achieving lightweight, reducing costs, optimizing the transmission path, and reducing the shift impulse, which is beneficial to miniaturization of components and can realize a 2 / 4-speed hybrid architecture.

[0044] Functions and Effects of the Embodiments

[0045] The hybrid transmission structure provided by the present invention includes an engine 10, an electric motor 20, a transmission body 30 and a differential 40. The transmission body 30 includes an input shaft 31 and an output shaft 32. The input shaft 31 is connected with a dual clutch 50. The dual clutch 50 is connected to the engine 10 and the electric motor 20, and the output shaft 32 is connected to the differential 40. The dual clutch 50 enables the engine 10 and the electric motor 20 to provide power simultaneously or individually, thereby improving stronger acceleration performance and higher efficiency, so that the hybrid transmission structure provided by the present invention has high transmission efficiency, high fuel efficiency, good fuel economy, good vehicle gear shifting and acceleration smoothness, good acceleration experience, avoidance of gear shifting shock, and effectively improves the performance and environmental protection of the vehicle. The hybrid transmission structure provided by the present invention has a simple structure, high transmission efficiency, high fuel efficiency, good fuel economy, good vehicle gear shifting and acceleration smoothness, good acceleration experience, avoidance of gear shifting shock, and can effectively improve the performance and environmental protection of the vehicle.

[0046] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hybrid transmission structure, characterized in that: The invention comprises an engine (10), an electric motor (20), a gearbox body (30) and a differential (40); the gearbox body (30) comprises an input shaft (31) and an output shaft (32); the input shaft (31) is connected to a double clutch (50); the double clutch (50) is connected to the engine (10) and the electric motor (20); the output shaft (32) is connected to the differential (40).

2. The hybrid transmission structure according to claim 1, characterized in that: The dual clutch (50) comprises a first clutch (51) and a second clutch (52), wherein the first clutch (51) is connected to the engine (10), and the second clutch (52) is connected to the motor (20).

3. The hybrid transmission structure according to claim 2, characterized in that: A planet row (33) is provided at one end of the input shaft (31) away from the dual clutch (50), and the planet row (33) includes a sun gear (331), planet gears (332), an inner gear ring (333) and a planet carrier (334). The sun gear (331) is meshed with the planet gear (332), the planet gear (332) is meshed with the inner gear ring (333), the planet gear (332) is connected to the planet carrier (334), the inner gear ring (333) is connected to the input shaft (31), and the planet carrier (334) is connected to the output shaft (32).

4. The hybrid transmission structure according to claim 3, characterized in that: A third clutch (60) is provided on a side of the planetary gearbox (33) away from the gearbox body (30), and the third clutch (60) is connected to the sun gear (331).

5. The hybrid transmission structure according to claim 4, characterized in that: The gearbox body (30) further comprises a 1+2 gear set (34), wherein the 1+2 gear set (34) comprises a first driving gear (341), a first driven gear (342) and a first combining tooth (343), wherein the first driving gear (341) is sleeved on the input shaft (31), the first driven gear (342) is sleeved on the output shaft (32), and the first combining tooth (343) is located between the first driving gear (341) and the first driven gear (342).

6. The hybrid transmission structure according to claim 5, characterized in that: The output shaft (32) is provided with a first synchronizer (70) and a second synchronizer (80), wherein the first synchronizer (70) is located on a side close to the 1+2 gear set (34), and the second synchronizer (80) is located on a side away from the 1+2 gear set (34).

7. The hybrid transmission structure according to claim 6, characterized in that: The gearbox body (30) further comprises a 3+4 gear set (35), wherein the 3+4 gear set (35) comprises a second driving gear (351), a second driven gear (352) and a second combining tooth (353), wherein the second driving gear (351) is sleeved on the input shaft (31), the second driven gear (352) is sleeved on the output shaft (32), and the second combining tooth (353) is located on one side of the second driving gear (351).

8. The hybrid transmission structure according to claim 7, characterized in that: The input shaft (31) is provided with a third synchronizer (90), and the third synchronizer (90) is located on a side of the 3+4 gear set (35) away from the planetary gear set (33).

9. The hybrid transmission structure according to claim 1, characterized in that: A differential gear set (41) is provided between the differential (40) and the output shaft (32), the differential gear set (41) comprising a third driving gear (411) and a third driven gear (412), the third driving gear (411) being sleeved The third driven gear (412) is arranged on the output shaft (32) and is connected to the differential (40). The third driving gear (411) and the third driven gear (412) are meshed.

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