Longitudinal series-parallel two-gear hybrid gearbox

Abstract

The utility model discloses a longitudinal series-parallel two-gear hybrid gearbox which comprises an input shaft, a planet row, a generator, a clutch, a driving motor, a gear transmission mechanism, a gear shifting mechanism and an output shaft, the input shaft is connected with the generator through the planet row, and the clutch is arranged between the generator and the driving motor. The driving motor is connected with the output shaft through the gear transmission mechanism and the gear shifting mechanism, the gear transmission mechanism comprises a parallel shaft and a plurality of gears, the parallel shaft is parallel to the output shaft, and the gear shifting mechanism is arranged on the parallel shaft. According to the longitudinally-arranged series-parallel two-gear hybrid gearbox, by arranging the gear transmission mechanism and the gear shifting mechanism, two-gear output of the driving motor is achieved, the design requirement for the maximum torque of the driving motor is further lowered, and the size and the weight of the motor are reduced; meanwhile, due to the arrangement of the planet row, the length size of the hybrid gearbox is shortened, the structure of the whole gearbox is more compact, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of driving and transmission of hybrid vehicles, in particular to a longitudinally arranged series-parallel two-speed hybrid transmission. Background Art

[0002] The country strongly advocates energy conservation and emission reduction, which is reflected in the automotive industry as improving fuel economy. For ordinary automatic transmissions and hybrid transmissions, achieving the lightweight and multi-gear of the transmission can effectively improve fuel economy.

[0003] Traditional series-parallel hybrids often adopt a single-speed design for the drive motor. In the low-speed and high-torque working conditions, since the engine cannot intervene, the torque designed for the drive motor is too large, resulting in cost waste and being unfavorable for improving fuel economy. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a longitudinally arranged series-parallel two-speed hybrid transmission, which can solve one or more of the above-mentioned prior art problems.

[0005] The utility model provides a longitudinally arranged series-parallel two-speed hybrid transmission, including: an input shaft, a planetary gear set, a generator, a clutch, a drive motor, a gear transmission mechanism, a shifting mechanism and an output shaft. The input shaft is connected to the generator through the planetary gear set. A clutch is arranged between the input shaft and the output shaft. The drive motor is connected to the output shaft through the gear transmission mechanism and the shifting mechanism. The gear transmission mechanism includes a parallel shaft and several gears. The parallel shaft is arranged parallel to the output shaft. The shifting mechanism is arranged on the parallel shaft.

[0006] In some embodiments, a shock absorber is arranged on the input shaft.

[0007] In some embodiments, the ring gear R of the planetary gear set is fixed on the transmission housing. The sun gear S of the planetary gear set is connected to the generator. The planet carrier P of the planetary gear set is connected to the input shaft.

[0008] In some embodiments, the gear transmission mechanism includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a sixth gear. The first gear is connected to the motor shaft of the drive motor. The second gear, the fourth gear and the sixth gear are arranged on the parallel shaft. The second gear meshes with the first gear. The shifting mechanism is arranged between the fourth gear and the sixth gear. The shifting mechanism can mesh with the fourth gear or the sixth gear to achieve the shifting function. The third gear and the fifth gear are respectively meshed and connected with the fourth gear and the sixth gear. The third gear and the fifth gear are respectively connected to the output shaft.

[0009] In some embodiments, the planetary gear set is arranged on the side of the generator away from the drive motor.

[0010] In some embodiments, the gear transmission mechanism and the shift mechanism are disposed on the side of the drive motor away from the generator.

[0011] For the longitudinally-mounted series-parallel two-speed hybrid transmission provided by the present utility model, through the arrangement of the gear transmission mechanism and the shift mechanism, two-speed output of the drive motor is achieved, further reducing the design requirement for the maximum torque of the drive motor, and reducing the volume and weight of the motor; meanwhile, through the arrangement of the planetary gear set, the length dimension of the hybrid transmission is shortened, making the overall box structure more compact and reducing the production cost.

[0012] In addition, in the technical solution of the present utility model, unless otherwise specifically stated, the technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 FIG. is a schematic structural diagram of the longitudinally-mounted series-parallel two-speed hybrid transmission provided by an embodiment of the present utility model.

[0015] Figure 2 FIG. is a schematic structural diagram of the longitudinally-mounted series-parallel two-speed hybrid transmission provided by an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The terms "comprising" and "having" and any variations thereof in the description and claims of the present utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, systems, products or devices.

[0017] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0018] Refer to the appended specification Figure 1-2, the embodiment of the present utility model provides a longitudinally arranged series-parallel two-speed hybrid transmission, including: an input shaft 1, a planetary gear set 2, a generator 3, a clutch 4, a drive motor 5, a gear transmission mechanism 6, a shift mechanism 7 and an output shaft 8.

[0019] Among them, the input shaft 1 is used to be connected to the engine, and a shock absorber 9 can be arranged on the input shaft 1. Thus, the shock absorber 9 can filter the torque fluctuations of the engine or the generator 3.

[0020] The input shaft 1 is connected to the generator 3 through the planetary gear set 2, and the planetary gear set 2 can be arranged on the side of the generator 3 away from the drive motor 5. Thus, the speed increase from the engine to the generator 3 can be achieved through the planetary gear set 2.

[0021] In an alternative embodiment, the ring gear R of the planetary gear set 2 is fixed on the transmission housing, the sun gear S of the planetary gear set 2 is connected to the generator 3, and the planet carrier P of the planetary gear set 2 is connected to the input shaft 1. Thus, a larger range of speed ratios from the engine to the generator 3 can be achieved, higher efficiency coverage of the engine and the generator 3 can be realized, the power generation efficiency can be improved, the volume of the generator 3 can be reduced, and at the same time, the output of the planetary gear set 2 and the output of the sun gear S are coaxially arranged, realizing the coaxial setting of the input shaft 1 and the output shaft 8, shortening the axial and longitudinal dimensions of the whole box, and facilitating the integrated layout of the hybrid transmission.

[0022] A clutch 4 is arranged between the input shaft 1 and the output shaft 8. The input end of the clutch 4 is connected to the input shaft 1, and the output end of the clutch 4 is connected to the output shaft 8. Thus, the power connection and disconnection between the input shaft 1 and the output shaft 8 are realized through the clutch 4. When the clutch 4 is opened, the engine generates electricity through the generator 3, and the electric energy drives the drive motor 5 to realize functions such as the forward and backward movement of the vehicle. When the clutch 4 is closed, the engine power is directly connected to the output shaft 8 to realize power output.

[0023] In an alternative embodiment, the position of the clutch 4 in space can be arranged between the generator 3 and the drive motor 5.

[0024] The drive motor 5 is connected to the output shaft 8 through the gear transmission mechanism 6 and the shift mechanism 7. The gear transmission mechanism 6 includes a parallel shaft 61 and several gears. The parallel shaft 61 is arranged parallel to the output shaft 8, and the shift mechanism 7 is arranged on the parallel shaft 61. Thus, the shift mechanism 7 is arranged non-coaxially with the input shaft 1 and the output shaft 8.

[0025] In an alternative embodiment, the gear transmission mechanism 6 and the shift mechanism 7 are arranged on the side of the drive motor 5 away from the generator 3.

[0026] In an alternative embodiment, the gear transmission mechanism 6 can include a first gear 62, a second gear 63, a third gear 64, a fourth gear 65, a fifth gear 66 and a sixth gear 67.

[0027] Among them, the first gear 62 is connected to the motor shaft of the drive motor 5. A second gear 63, a fourth gear 65 and a sixth gear 67 are arranged on the parallel shaft 61. The second gear 63 meshes with the first gear 62. The shifting mechanism 7 is arranged between the fourth gear 65 and the sixth gear 67. The shifting mechanism 7 can mesh with the fourth gear 65 or the sixth gear 67 to achieve the shifting function. The third gear 64 and the fifth gear 66 are respectively meshed and connected with the fourth gear 65 and the sixth gear 67. The third gear 64 and the fifth gear 66 are respectively connected to the output shaft 8.

[0028] Thus, the gear transmission mechanism 6 can achieve the first-stage deceleration from the first gear 62 to the second gear 63, and the second-stage deceleration from the fourth gear 65 to the third gear 64; the gear transmission mechanism 6 can also achieve the first-stage deceleration from the first gear 62 to the second gear 63, and the second-stage deceleration from the sixth gear 67 to the fifth gear 66. When the shifting mechanism 7 meshes with the sixth gear 67, the power of the drive motor 5 is respectively output in the first gear through the first gear 62, the second gear 63, the shifting mechanism 7, the sixth gear 67 and the fifth gear 66; when the shifting mechanism 7 meshes with the fourth gear 65, the power of the drive motor 5 is respectively output in the second gear through the first gear 62, the second gear 63, the shifting mechanism 7, the fourth gear 65 and the third gear 64, where the first-gear speed ratio is greater than the second-gear speed ratio.

[0029] The longitudinally-mounted series-parallel two-speed hybrid transmission provided by the present utility model has the following working conditions when working:

[0030] When the vehicle speed is low but there is a large torque requirement such as climbing a slope, the clutch 4 is opened, and the engine drives the generator 3 to generate electricity through the planetary gear set 2 for speed increase. The generated electric energy drives the drive motor 5 to output high torque power through the first gear. When the vehicle decelerates, kinetic energy recovery can be achieved through the drive motor 5;

[0031] When the vehicle speed is low and the torque requirement is small, the clutch 4 is opened, and the engine drives the generator 3 to generate electricity through the planetary gear set 2 for speed increase. The generated electric energy drives the drive motor 5 to output power through the second gear, improving the working efficiency of the drive motor 5. When the vehicle decelerates, kinetic energy recovery can be achieved through the drive motor 5;

[0032] When the vehicle speed is medium or high, the clutch 4 is closed to achieve direct engine output. The shifting mechanism 7 is in the second-gear position, reducing the rotation speed of the drive motor 5 and reducing the power consumption. When the vehicle decelerates, kinetic energy recovery can be achieved through the drive motor 5.

[0033] The longitudinally arranged series-parallel two-speed hybrid transmission provided by the present utility model realizes two-speed output of the drive motor through the setting of a gear transmission mechanism and a shifting mechanism, reduces the design requirement for the maximum torque of the drive motor, reduces the volume and weight of the motor, and reduces costs; at the same time, through the setting of the planetary gear set, the length dimension of the hybrid transmission is shortened, the overall box structure is more compact, and the production cost is further reduced; it is applicable to light commercial vehicles such as pickup trucks or light trucks, and can meet the low-speed high-torque demand and the direct connection output of the engine under high-speed conditions.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A longitudinally mounted series-parallel two-speed hybrid transmission, characterized in that: include: An input shaft (1), a planetary gear (2), a generator (3), a clutch (4), a drive motor (5), a gear transmission mechanism (6), a shift mechanism (7) and an output shaft (8), The input shaft (1) is connected to the generator (3) via the planetary gear (2). The clutch (4) is arranged between the input shaft (1) and the output shaft (8). The driving motor (5) is connected to the output shaft (8) via the gear transmission mechanism (6) and the shift mechanism (7). The gear transmission mechanism (6) comprises a parallel shaft (61) and a plurality of gears; the parallel shaft (61) is arranged parallel to the output shaft (8); and the gear shifting mechanism (7) is arranged on the parallel shaft (61).

2. The longitudinal series-parallel two-speed hybrid transmission according to claim 1, characterized in that: A vibration damper (9) is arranged on the input shaft (1).

3. The longitudinal series-parallel two-speed hybrid transmission according to claim 1, characterized in that: The ring gear R of the planetary gear row (2) is fixed on the gearbox housing, the sun gear S of the planetary gear row (2) is connected to the generator (3), and the planet carrier P of the planetary gear row (2) is connected to the input shaft (1).

4. The longitudinal series-parallel two-speed hybrid transmission according to claim 1, characterized in that: The gear transmission mechanism (6) comprises a first gear (62), a second gear (63), a third gear (64), a fourth gear (65), a fifth gear (66) and a sixth gear (67). The first gear (62) is connected to the motor shaft of the driving motor (5). The parallel shaft (61) is provided with a second gear (63), a fourth gear (65) and a sixth gear (67); the second gear (63) is meshed with the first gear (62); the shift mechanism (7) is provided between the fourth gear (65) and the sixth gear (67); the shift mechanism (7) can be meshed with the fourth gear (65) or the sixth gear (67) to realize a shifting function; The third gear (64) and the fifth gear (66) are meshed and connected with the fourth gear (65) and the sixth gear (67) respectively, and the third gear (64) and the fifth gear (66) are connected with the output shaft (8) respectively.

5. The longitudinal series-parallel two-speed hybrid transmission according to claim 1, characterized in that: The planetary gear (2) is arranged on a side of the generator (3) away from the drive motor (5).

6. The longitudinal series-parallel two-speed hybrid transmission according to claim 1, characterized in that: The gear transmission mechanism (6) and the gear shift mechanism (7) are arranged on a side of the drive motor (5) away from the generator (3).

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