CN107542863B - Three-planet hybrid two-speed automatic transmission assembly - Google Patents

Abstract

The invention relates to a three-planet hybrid two-speed automatic transmission assembly, which includes a casing, an input shaft, and an output shaft. The first ring gear, the second ring gear, and the third ring gear are fixedly connected to the first sun gear on the input shaft, the first sun gear meshes with the first planetary gear, and the first planetary gear meshes with the first ring gear; the output shaft The second sun gear is fixedly connected, the second sun gear meshes with the second planetary gear, the second planetary gear and the first planetary gear are supported on the first rotating planet carrier, the second planetary gear meshes with the internal teeth of the second ring gear, The outer teeth of the second ring gear mesh with the first shifting element set on the housing, and the second ring gear is a movable ring gear; the third sun gear is fixedly connected to the output shaft, and the third sun gear meshes with the third planetary gear , the third planetary gear meshes with the inner teeth of the third ring gear, and the outer teeth of the third ring gear meshes with the second shifting element provided on the housing.

Description

Three-planet hybrid two-speed automatic transmission assembly

technical field

The invention relates to an automobile transmission, in particular to a three-planet hybrid two-speed automatic transmission assembly.

Background technique

At present, there are two types of new energy vehicle technologies on the market: pure electric vehicles and hybrid vehicles. Hybrid electric vehicles combine electric drive with traditional internal combustion engine drive, that is, they are driven by generators, electric motors and engines, and the power is transmitted to the vehicle drive wheels through a transmission. Hybrid electric vehicles generally use multi-shaft ordinary gear transmissions. In traditional ordinary gear transmissions, the power transmission is through the meshing of multiple pairs of gears, the force is unbalanced, the deflection of the gears and gear shafts is large, the noise is large, and it is not suitable for high speed. rotation, otherwise it will be unstable and noisy. The battery of new energy vehicles occupies a considerable space, resulting in a small space for the installation of the power system. Since the traditional ordinary gear transmission adopts a multi-shaft arrangement, the shifting elements for laterally moving gears are installed on the shafts, so the traditional ordinary The large size of the gear transmission makes it difficult to adapt to new energy vehicles. The power transmission loss of the transmission is too large, which affects the layout and performance of the vehicle.

Contents of the invention

The object of the present invention is to address the deficiencies in the prior art and provide a three-planet hybrid two-speed automatic transmission assembly, which has a simple and reliable structure, small volume, stable movement, strong shock and vibration resistance, long life, and Reduce energy consumption in vehicle powertrains.

The object of the present invention is achieved in this way: a three-planet hybrid two-speed automatic transmission assembly includes a housing, an input shaft, and an output shaft, the input shaft and the output shaft are located on the same axis, and the two shafts The input shaft is used to connect the power device, the output shaft is fixed circumferentially with the rotating shaft of the auxiliary drive motor, and the first ring gear, the second ring gear, and the third gear ring are sequentially arranged in the housing along the axial direction of the output shaft. The axis of the three ring gears coincides with the axis of the output shaft. The first sun gear is fixedly connected to the input shaft, and the first sun gear meshes with the first planetary gear. The first planetary gear is supported on the second On a rotating planet carrier, the first planetary gear meshes with the fixed first ring gear in the housing;

The second sun gear is fixedly connected to the output shaft, and the second sun gear meshes with the second planetary gear. The second planetary gear and the first planetary gear are supported on the first rotating planet carrier with pins. The planetary gear meshes with the inner teeth of the second ring gear, the outer teeth of the second ring gear mesh with the first shifting element provided on the housing, and the second ring gear is a movable ring gear;

A third sun gear is fixedly connected to the output shaft, and the third sun gear meshes with the third planetary gear. The third planetary gear is supported on the second rotating planetary carrier through a pin shaft. The internal teeth of the third ring gear are meshed, the second rotating planet carrier is provided with external teeth, and the external teeth are meshed with the internal teeth of the second ring gear, and the external teeth of the third ring gear are in contact with the first gear set on the housing. The two shifting elements are engaged, and the third ring gear is a movable ring gear.

The first rotating planet carrier is supported in the sleeve provided in the housing through bearings, the second rotating planet carrier is supported in the sleeve provided in the housing through bearings, the first rotating planet carrier and the second rotating planet The frame is rotatably butted through the second bearing.

The first rotating planet carrier is supported on the input shaft through the first bearing, the first rotating planet carrier is supported on the output shaft through the third bearing, and the first rotating planet carrier and the second rotating planet carrier are passed through the second Bearing rotatable butt joint.

The first planetary wheel, the second planetary wheel, and the third planetary wheel are all provided with three, and are equally divided into 360 degrees.

The first shifting element and the second shifting element are friction clutches.

The first shifting element and the second shifting element are brakes.

The power unit is an engine.

The power device is a motor.

With the above scheme, the input shaft and the output shaft are located on the same axis line, and the two shafts are not connected, the input shaft is used to connect the power device, the output shaft is circumferentially fixed to the rotating shaft of the auxiliary drive motor, and the housing The first ring gear, the second ring gear, and the third ring gear are arranged in sequence along the axis of the output shaft in the body. The axes of the three ring gears coincide with the axis of the output shaft. The sun gear meshes with the first planetary gear, and the first planetary gear is supported on the first rotating planet carrier through a pin shaft, and the first planetary gear meshes with the fixed first ring gear in the housing; the output shaft is fixed on the The second sun gear is connected to the second sun gear, and the second sun gear is meshed with the second planetary gear. The second planetary gear and the first planetary gear are supported on the first rotating planetary carrier with pins. The second planetary gear and the second gear The inner teeth of the second ring gear mesh, the outer teeth of the second ring gear mesh with the first shifting element set on the housing, the second ring gear is a movable ring gear; the output shaft is fixedly connected to the third sun The third sun gear meshes with the third planetary gear, and the third planetary gear is supported on the second rotating planetary carrier through a pin shaft, and the third planetary gear meshes with the internal teeth of the third ring gear. There are external teeth on the second rotating planet carrier, and the external teeth mesh with the internal teeth on the second ring gear. The external teeth of the third ring gear mesh with the second shifting element provided on the housing. The third teeth The ring is a movable ring gear. The first sun gear, the first planetary gear, the first rotating planet carrier, and the first ring gear form the first-stage planetary row, and the second sun gear, the second planetary gear, the first rotating planet carrier, and the second tooth The circle forms the second-stage planetary row, the third sun gear, the third planetary gear, the second rotating planet carrier, and the third ring gear form the third-stage planetary row, and the three-stage planetary row forms a planetary transmission mechanism, and the power passes through the first The first-stage planetary row realizes deceleration, the power realizes speed-up through the second-stage planetary row, and the power realizes speed-up through the third-stage planetary row. The power first achieves a first-stage deceleration through the first-stage planetary row. When the shifting element brakes the second ring gear, the first rotating planet carrier in the second-stage planetary row is input and the second sun gear is output, forming a set of speed-up Mechanism, power through the first-stage planetary row, the second-stage planetary row to achieve first-speed transmission. When the outer teeth of the second ring gear are separated from the first shifting element, the first shifting element cannot fix the second ring gear. Since the inner teeth of the second ring gear mesh with the outer teeth of the second planet carrier, the second teeth The ring drives the second planetary carrier to rotate, and when the second shifting element is engaged with the third ring gear, the power passes through the first-stage planetary row, the second-stage planetary row, and the third-stage planetary row to realize the second-speed transmission. When the external teeth of the second ring gear are separated from the first shifting element, and the external teeth of the third ring gear are separated from the second shifting element, the entire planetary transmission mechanism has no power output. The three-planet hybrid two-speed automatic transmission assembly can combine the drive of the auxiliary drive motor with the drive of the power unit, and can adopt two driving modes of the power unit and the auxiliary drive motor, or the power unit. The power of the power unit ensures the normal driving of the car. The basic power required by the engine, the auxiliary drive motor compensates for the lack of power during starting and idling. Due to the assistance of the auxiliary drive motor, the power consumption of the power unit can be reduced. Compared with the conventional engine, the energy consumption is lower. Work at the same time at full speed to increase power output, so as to achieve high power, energy saving and consumption reduction. Planetary gear transmission is a kind of constant mesh transmission. Its gear shifting is not by moving the gear into meshing or disengaging meshing. Its transmission ratio transformation can be easily realized by separating or engaging the shifting elements, which is especially beneficial to realize power shifting. gear or automatic shift. The two gear shift actuators brake the ring gear of the planetary gear mechanism according to certain rules, without the need to move the gears laterally, so that the planetary gear mechanism can obtain different transmission ratios, thereby realizing the transformation of each gear, and shortening the axial length of the transmission. The length also meets the needs of the whole vehicle for a multi-gear transmission. The three-planet hybrid two-speed automatic transmission is always a coaxial transmission structure, which can significantly reduce the size of the transmission compared with the traditional multi-shaft transmission. Since the planetary gear transmission adopts multi-point meshing transmission, a small gear module can be used when transmitting the same torque, so the size is small and the weight is light. In addition, the symmetry of the multi-point mesh not only balances the radial force, but also makes the movement stable, strong in shock and vibration resistance, and long in life. With the above structure, the transmission ratio can be changed to meet the traction requirements of different driving conditions, so that the power unit can work under favorable working conditions as much as possible to meet the possible driving speed requirements. Change the speed of the car and the torque on the driving wheels of the car in a large range. When the shift element is separated or engaged to interrupt the power transmission, the power transmission can be interrupted when the engine starts, idles, and the car shifts gears.

The first planetary wheel, the second planetary wheel, and the third planetary wheel are all provided with three, and are equally divided into 360 degrees. The fixed structure of the planetary gear forms a triangle, each tooth is evenly stressed at the same time, the transmission is balanced, and the noise is small. Due to the dispersion of the transmitted power, the force deformation of the input shaft and output shaft during the transmission process is avoided.

The first shifting element and the second shifting element are friction clutches, and the second ring gear and the third ring gear are fixed and rotated through engagement and disengagement of the clutches.

The first shifting element and the second shifting element are brakes, and the fixing and rotation of the second ring gear and the third ring gear are realized through the braking and disengagement of the brakes.

The power device is a motor, the motor has small volume, high speed, and low power, and the power output by the high-speed motor obtains a large output torque after passing through the three-plane hybrid two-speed automatic transmission assembly, so that the car can obtain the required power and speed.

Adopting the above-mentioned invention, it has simple and reliable structure, small volume, stable movement, strong shock and vibration resistance, long service life, and can reduce the energy consumption of the vehicle power system.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the accompanying drawings, 1 is the input shaft, 2 is the first bearing, 3 is the first sun gear, 4 is the first bearing, 5 is the second sun gear, 6 is the second bearing, 7 is the third sun gear, 8 is The third bearing, 9 is the output shaft, 10 is the second shifting element, 11 is the third planetary gear, 17 is the first ring gear, 13 is the second rotating planet carrier, 14 is the first shifting element, 15 is the first gear Two ring gears, 16 is the second planetary gear, 12 is the third ring gear, 18 is the first planetary gear, 19 is the first rotary planet carrier, 20 is the power unit, and 21 is the auxiliary drive motor.

Detailed ways

Referring to the accompanying drawings, specific embodiments of the present invention will be described in detail.

Referring to Fig. 1, an embodiment of a three-planetary hybrid two-speed automatic transmission assembly, the three-planetary hybrid two-speed automatic transmission assembly includes a housing, an input shaft 1, an output shaft 9, and the input shaft 1 Located on the same axis line as the output shaft 9, the two shafts are not connected, the input shaft 1 is used to connect the power unit 20, the power unit 20 can be an engine, the engine is used as the power unit, and the engine and the auxiliary drive motor form the power The system, the power system, has high fuel economy performance and excellent driving performance. When starting and accelerating, due to the assistance of the auxiliary drive motor 21, the fuel consumption can be reduced. Compared with the single-use engine power device, the fuel cost is lower. . Described power device 20 also can be motor, and the volume of motor is small, and rotating speed is high, and power is little, and the power that the high-speed motor outputs obtains big output torque after three-planet hybrid two-speed automatic transmission assembly, makes automobile obtain required power and speed. The output shaft 9 and the rotating shaft of the auxiliary drive motor 21 are fixed circumferentially, and the first ring gear 17, the second ring gear 15, the third ring gear 12, and three ring gears are sequentially arranged in the housing along the axial direction of the output shaft 9. The axis coincides with the axis of the output shaft 9, the input shaft 1 is fixedly connected with the first sun gear 3, the first sun gear 3 meshes with the first planetary gear 18, and the first planetary gear 18 is supported on the first On a rotating planetary carrier 19, the first rotating planetary carrier 19 can be supported in a shaft sleeve provided in the housing through bearings. The first rotating planet carrier 19 can also be supported on the input shaft 1 via the first bearing 2 . The first planetary gear 18 meshes with the first ring gear 17 fixed in the housing.

The second sun gear 5 is fixedly connected to the output shaft 9, and the second sun gear 5 meshes with the second planetary gear 16, and the second planetary gear 16 and the first planetary gear 18 are supported on the first rotating planet carrier with pins 19, the second planetary gear 16 meshes with the inner teeth of the second ring gear 15, and the outer teeth of the second ring gear 15 meshes with the first shift element 14 provided on the housing, and the first shift The gear element 14 can be a friction clutch, and the second ring gear 15 and the third ring gear 12 can be fixed and rotated through engagement and disengagement of the clutch. The first shifting element 14 can also be a brake, and the second ring gear 15 can be fixed and rotated by braking and disengaging the brake. The second ring gear 15 is a movable ring gear when disengaged from the brake or the clutch.

A third sun gear 7 is fixedly connected to the output shaft 9, and the third sun gear 7 meshes with the third planetary gear 11, and the third planetary gear 11 is supported on the second rotating planetary carrier 13 through a pin shaft. The second rotating planet carrier 13 is supported in the bushing provided in the casing through bearings, and the first rotating planet carrier 19 and the second rotating planet carrier 13 are rotatably docked through the second bearing 6 . The second rotating planet carrier 13 can also be supported on the output shaft 9 through the third bearing 8 , and the first rotating planet carrier 19 and the second rotating planet carrier 13 are rotatably docked through the second bearing 6 . The second rotating planet carrier 13 is provided with external teeth, and the external teeth mesh with the internal teeth on the second ring gear 15 . The third planetary gear 11 meshes with the internal teeth of the third ring gear 12, and the second shifting element 10 can be a friction clutch, and the second ring gear 15 and the third ring gear 12 are connected by engaging and disengaging the clutch. Fixed and turned. The second shifting element 10 can also be a brake, and the fixing and rotation of the second ring gear 15 and the third ring gear 12 can be realized through the braking and disengagement of the brake. The external teeth of the third ring gear 12 mesh with the second shifting element 10 provided on the housing, and the third ring gear 12 is an active ring gear when disengaged from the brake or the clutch. The first planetary gear 18, the second planetary gear 16, and the third planetary gear 11 are all provided with three, and are equally divided by 360 degrees. The fixed structure of the planetary gears forms a triangle, and each tooth is evenly stressed at the same time, the transmission is balanced, and the noise is small. , Due to the dispersion of the transmitted power, the force deformation of the input shaft 1 during the transmission process is avoided.

When the above scheme is used for power transmission, the first sun gear 3, the first planetary gear 18, the first rotating planet carrier 19, and the first ring gear 17 form the first-stage planetary row, and the second sun gear 5, the first The second planetary gear 16, the first rotating planetary carrier 19, and the second ring gear 15 form the second-stage planetary row, and the third sun gear 7, the third planetary gear 11, the second rotating planetary carrier 13, and the third ring gear 12 The third-stage planetary row is formed, and the three-stage planetary row forms a planetary transmission mechanism. The power is decelerated through the first-stage planetary row, the power is accelerated through the second-stage planetary row, and the power is accelerated through the third-stage planetary row. The power first passes through the first-stage planetary row to achieve a first-stage deceleration. When the second shift element 14 brakes the second ring gear 15, the first rotating planet carrier 19 in the second-stage planetary row is input and the second sun gear 5 is output. , forming a group of speed-increasing mechanisms, and the power is transmitted through the first-stage planetary row and the second-stage planetary row to realize first-speed transmission. When the outer teeth of the second ring gear 15 are separated from the first shifting element 14, the first shifting element 14 cannot fix the second ring gear 15, because the outer teeth provided on the second rotating planet carrier 13 are in contact with the first shifting element 14. The internal teeth on the second ring gear 15 mesh, and the second ring gear 15 drives the second rotating planetary carrier 13 to rotate. When the second shifting element is engaged with the third ring gear 12, the power passes through the first-stage planetary row and the second-stage planetary row. , The third-stage planetary row realizes the second gear transmission. When the outer teeth of the second ring gear 15 are separated from the first shifting element 14 and the outer teeth of the third ring gear 12 are separated from the second shifting element 10, the entire planetary transmission mechanism has no power output and is in a neutral state.

Claims (5)

1. The utility model provides a three planet row hybrid two keep off automatic gearbox assembly, includes casing, input shaft (1), output shaft (9), its characterized in that: the input shaft (1) and the output shaft (9) are positioned on the same axis, the two shafts are not connected, the input shaft (1) is used for being connected with a power device, the output shaft (9) is circumferentially fixed with a rotating shaft of an auxiliary driving motor (21), a first gear ring (17), a second gear ring (15) and a third gear ring (12) are sequentially arranged in a shell along the axis direction of the output shaft (9), the axes of the three gear rings are coincident with the axis of the output shaft (9), a first sun gear (3) is fixedly connected to the input shaft (1), the first sun gear (3) is meshed with a first planet gear (18), the first planet gear (18) is supported on a first rotary planet carrier (19) through a pin shaft, and the first planet gear (18) is meshed with the first gear ring (17) fixed in the shell;

the output shaft (9) is fixedly connected with a second sun gear (5), the second sun gear (5) is meshed with a second planet gear (16), the second planet gear (16) and a first planet gear (18) are supported on a first rotary planet carrier (19) through pin shafts, the second planet gear (16) is meshed with inner teeth of a second gear ring (15), outer teeth of the second gear ring (15) are meshed with a first gear shifting element (14) arranged on a shell, and the second gear ring (15) is a movable gear ring;

the output shaft (9) is fixedly connected with a third sun gear (7), the third sun gear (7) is meshed with a third planet gear (11), the third planet gear (11) is supported on a second rotary planet carrier (13) through a pin shaft, the third planet gear (11) is meshed with the inner teeth of a third gear ring (12), the second rotary planet carrier (13) is provided with outer teeth which are meshed with the inner teeth of a second gear ring (15), the outer teeth of the third gear ring (12) are meshed with a second gear shifting element (10) arranged on a shell, and the third gear ring (12) is a movable gear ring;

the first rotary planet carrier (19) is supported in a shaft sleeve arranged in the shell through a bearing, the second rotary planet carrier (13) is supported in the shaft sleeve arranged in the shell through a bearing, and the first rotary planet carrier (19) and the second rotary planet carrier (13) are in rotatable butt joint through a second bearing (6);

the first shift element (14) and the second shift element (10) are friction clutches.

2. The three planetary row hybrid two speed automatic transmission assembly according to claim 1, wherein: the first rotary planet carrier (19) is supported on the input shaft (1) through a first bearing (2), the second rotary planet carrier (13) is supported on the output shaft (9) through a third bearing (8), and the first rotary planet carrier (19) is rotatably butted with the second rotary planet carrier (13) through a second bearing (6).

3. The three planetary row hybrid two speed automatic transmission assembly according to claim 1, wherein: the first planet gears (18), the second planet gears (16) and the third planet gears (11) are all three, and are equally divided into 360 degrees.

4. The three planetary row hybrid two speed automatic transmission assembly according to claim 1, wherein: the first shift element (14) and the second shift element (10) are brakes.

5. The three planetary row hybrid two speed automatic transmission assembly according to claim 1, wherein: the power device (20) is an engine.

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