CN104477021A - Double-motor multi-mode rotation speed coupling driving assembly - Google Patents

Abstract

The invention provides a dual-motor multi-mode rotational speed coupling drive assembly. The present invention adopts an overrunning clutch to realize mode switching, and a single planetary row system composed of a planetary gear mechanism 9 is used as a power coupling device for the No. 1 motor 18 and the No. 2 motor 12 . The No. 1 two-way controllable overrunning clutch 9 and the No. two two-way controllable overrunning clutch 14 are respectively used to limit the steering of the No. 1 motor 18 and the No. 2 motor 12, and are used to realize various working modes and modes of the vehicle in forward and reverse situations. Hit-free switching between. The present invention can realize multiple working modes of independent driving of two motors, coupled driving of dual motor speeds, independent braking energy recovery of two motors, and coupled braking energy recovery of dual motor speeds, which can meet the power requirements of vehicle driving, and the mode switching has no impact , low precision requirements for motor torque control, high efficiency of transmission system.

Description

A dual-motor multi-mode rotational speed coupling drive assembly

technical field

The invention belongs to the technical field of power assembly components, and in particular relates to a dual-motor power coupling drive assembly.

Background technique

At present, the electric drive device of electric buses often uses a single high-power drive motor and gearbox. By controlling the gearbox to work in different gear ratios, the torque and speed output by the drive system are adjusted to meet the requirements of vehicle climbing and high-speed driving. . However, during the shifting process of the automatic transmission, due to the need to cut off the power source, power interruption occurs when the vehicle shifts gears, thus causing problems such as vehicle stall and impact. Some drive systems and transmission mechanisms without power interruption functions were born, such as dual-motor speed coupling drive structures and dual-clutch transmissions. However, since the brake or clutch mainly adopts a wet clutch during the shifting process, the efficiency of the system is relatively low.

The Chinese patent application number 201010100671.7 discloses a double-motor speed coupling drive assembly suitable for electric buses, which consists of a simple planetary gear mechanism, two drive motors, and a lock. At low speed, the No. 1 motor is connected with the sun gear of the planetary mechanism, and the locker locks the ring gear. The power is input from the sun gear and output from the planet carrier to realize the deceleration ratio and output large torque; at high speed, the locker unlocks the gear. The power of motor No. 1 is input to the sun gear, and the power of motor No. 2 is input to the ring gear of the planetary gear mechanism connected to it. The speed coupling of the input power of the two motors is realized through the planetary gear mechanism; the structure of this scheme is simple and reduces Torque capacity and power of a single motor. However, there are the following disadvantages: the mode switching has high requirements on the control of the locker and the motor, and the impact is relatively large.

The Chinese patent application number 201210024534.9 discloses a dual-motor coupling speed change device, which consists of a set of planetary gear mechanisms, a set of fixed-axis gear mechanisms, two drive motors, a locker, and two clutches. Through joint control of two clutches and a lock-up device, the torque coupling output and speed coupling output of the dual motors, as well as the switching between the two output modes can be realized. This scheme realizes gear shifting without power interruption when the vehicle is running; at low speeds, it achieves high torque output through dual-motor torque coupling, and at high speeds through dual-motor speed coupling to achieve high-speed output; whether it is torque coupling or speed Under coupling, both motors participate in the work, and the utilization rate is high. But there is the deficiency of complex mechanical structure.

Contents of the invention

The present invention aims to provide a speed coupling drive structure with simple and convenient mode switching control process, no shifting impact and no power interruption during the shifting process; single motor drive at low speed and dual motor drive at high speed, through coordinated control of two bidirectional The working mode of the overrunning clutch makes the mode switching of the drive system simple, convenient and without impact, and avoids the serious energy loss of the drive system caused by the belt discharge loss during the use of the traditional wet clutch.

The purpose of the present invention is achieved like this:

The power that No. two motor (12) sends is output to planetary gear mechanism (6) through No. two speed changer (13), No. two two-way controllable overrunning clutch (14), and the power that No. one motor (18) outputs is through No. one speed changer ( 17) Output to the planetary gear mechanism (6), the power of the No. 2 motor (12) and the No. 1 motor (18) passes through the planetary gear mechanism (6), the planet carrier (5), the final reducer (4), and the differential (2), drive axle (1) output to wheel (3). The No. 1 bidirectional controllable overrunning clutch (9) and the No. 2 bidirectional controllable overrunning clutch (14) are used to realize switching between various working modes of the dual-motor multi-mode coupling drive structure. This structure can effectively realize the requirements of multiple working modes of the vehicle.

Description of drawings

The accompanying drawing is a structural diagram of the dual-motor multi-mode rotational speed coupling drive assembly.

Detailed ways

Now further illustrate in conjunction with accompanying drawing.

The present invention is composed of drive axle (1), differential (2), wheels (3), final drive (4), planetary gear mechanism (6), No. 1 two-way controllable overrunning clutch (9), casing ( 11), No. 2 motor (12), No. 2 transmission (13), No. 2 two-way controllable overrunning clutch (14), No. 1 transmission (17), No. 1 motor (18), No. 1 shift fork (10), No. 2 shift fork (15) is formed, and wherein planetary gear mechanism (6) is made up of planetary gear (7), ring gear (8), planet carrier (5), sun gear (16), it is characterized in that: No. 2 motor ( 12) The power sent out is output to the planetary gear mechanism (6) through No. 2 transmission (13) and No. 2 two-way controllable overrunning clutch (14), and the power output by No. 1 motor (18) is output to Planetary gear mechanism (6), the power of No. 2 motor (12) and No. 1 motor (18) passes through planetary gear mechanism (6), planet carrier (5), final reducer (4), differential gear (2), Transaxle (1) output to wheels (3).

The working mode of No. 1 bidirectional controllable overrunning clutch (9) is controlled by No. 1 shift fork (10), and the working mode of No. 2 bidirectional controllable overrunning clutch (9) is controlled by No. 2 shift fork (15).

By controlling the working states of No. 1 shift fork (10), No. 2 shift fork (15), No. 1 motor (18) and No. 2 motor (12), multiple working modes of dual motors can be obtained, and the combined states are shown in the table 1, where "1" indicates that the overrunning clutch is in the forward overrunning state, "0" indicates that the overrunning clutch is in the locked state, "-1" indicates that the overrunning clutch is in the reverse overrunning state, and "M" indicates that the motor is working in the motor state , "G" means the motor is working as a generator, "C" means the motor is off.

Table 1 Working Mode

The drive mode of the next motor in the forward state: the No. 1 bidirectional controllable overrunning clutch (9) works in the forward overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the locked state, and the No. 1 motor (18) works in the In the electric mode, the No. 2 motor (12) stops working, and the output power of the No. 1 motor (18) passes through the No. 1 transmission (17), the ring gear (8), the planet carrier (5), the final reducer (4), and the differential (2), output to the driving axle (1), and finally output the power to the wheels (3).

The regenerative braking mode of the next motor in the forward state: the No. 1 bidirectional controllable overrunning clutch (9) works in the forward overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the locked state, and the No. 1 motor (18) Working in the power generation mode, the No. 2 motor (12) stops working, and the inertia torque of the vehicle passes through the wheels (3), drive axle (1), differential (2), final reducer (4), planetary carrier (5) , the ring gear (8), and drag the No. 1 motor (18) to rotate to regenerate braking energy.

Drive mode of the next motor in the reversing state: the No. 1 bidirectional controllable overrunning clutch (9) works in the reverse overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the locked state, and the No. 1 motor (18) works in the In the electric mode, the No. 2 motor (12) stops working, and the output power of the No. 1 motor (18) passes through the No. 1 transmission (17), the ring gear (8), the planet carrier (5), the final reducer (4), and the differential (2), output to the driving axle (1), and finally output the power to the wheels (3).

The regenerative braking mode of the next motor in the reverse state: the No. 1 bidirectional controllable overrunning clutch (9) works in the reverse overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the locked state, and the No. 1 motor (18) Working in the power generation mode, the No. 2 motor (12) stops working, and the inertia torque of the vehicle passes through the wheels (3), drive axle (1), differential (2), final reducer (4), planetary carrier (5) , the ring gear (8), and drag the No. 1 motor (18) to rotate to regenerate braking energy.

Driving mode of the No. 2 motor in the forward state: the No. 1 bidirectional controllable overrunning clutch (9) works in the locked state, the No. 2 bidirectional controllable overrunning clutch (14) works in the forward overrunning state, and the No. 1 motor (18) stops working , the No. 2 motor (12) works in the electric state, and the output power of the No. 2 motor (12) passes through the No. (2), output to the driving axle (1), and finally output the power to the wheels (3).

The regenerative braking mode of motor No. 2 in the forward state: the No. 1 two-way controllable overrunning clutch (9) works in the locked state, the No. 2 two-way controllable overrunning clutch (14) works in the positive overrunning state, and the No. 1 motor (18) stop working, the No. 2 motor (12) works in the power generation state, and the inertial torque of the vehicle passes through the wheels (3), drive axle (1), differential (2), final reducer (4), planetary carrier (5) , sun gear (16), drag No. 2 motor (12) to rotate, and carry out braking energy recovery.

Driving mode of the No. 2 motor in the reverse state: No. 1 bidirectional controllable overrunning clutch (9) works in the locked state, No. 2 bidirectional controllable overrunning clutch (14) works in the reverse overrunning state, and No. 1 motor (18) stops working , the No. 2 motor (12) works in the electric state, and the output power of the No. 2 motor (12) passes through the No. (2), output to the driving axle (1), and finally output the power to the wheels (3).

In the reversing state, the braking energy recovery mode of the No. 2 motor: the No. 1 two-way controllable overrunning clutch (9) works in the locked state, the No. 2 two-way controllable overrunning clutch (14) works in the reverse overrunning state, and the No. 1 motor (18 ) stops working, the No. 2 motor (12) works in the power generation state, and the inertia torque of the vehicle passes through the wheels (3), drive axle (1), differential (2), final reducer (4), planetary carrier (5 ), sun gear (16), drag No. 2 motor (12) to rotate, and carry out braking energy recovery.

Dual-motor drive mode in the forward state: the No. 1 bidirectional controllable overrunning clutch (9) works in the forward overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the forward overrunning state, and the No. 1 motor (18) works in the forward overrunning state. In the electric mode, the No. 2 motor (12) works in the electric mode, and the output power of the No. 1 motor (18) is input to the planetary gear mechanism (6) through the No. 1 speed changer (17), the ring gear (8), and the No. 2 motor (12 ) output power is input to the planetary gear mechanism (6) through the No. 2 transmission (13), the sun gear (16), and the planetary gear mechanism (6) outputs the power of the two motors to the final drive ( 4), the differential (2), output to the drive axle (1), and finally output the power to the wheels (3).

Dual-motor regenerative braking mode in the forward state: the No. 1 bidirectional controllable overrunning clutch (9) works in the forward overrunning state, the No. 2 bidirectional controllable overrunning clutch (14) works in the forward overrunning state, and the No. 1 motor (18) and No. 2 motor (12) work in the power generation mode, and the inertial torque of the vehicle is input to the In the planetary gear mechanism (6), part of the energy passes through the sun gear (16) and drives the No. ) rotates to recover braking energy.

Dual-motor drive mode in reverse state: No. 1 bidirectional controllable overrunning clutch (9) works in reverse overrunning state, No. 2 bidirectional controllable overrunning clutch (14) works in reverse overrunning state, No. 1 motor (18) and No. 2 The No. motor (12) works in the electric mode, the output power of the No. 1 motor (18) is input to the planetary gear mechanism (6) through the No. No. 2 transmission (13), sun gear (16), are input to the planetary gear mechanism (6), and the planetary gear mechanism (6) outputs the power of the two motors to the main reducer (4), differential Transmission (2), output to drive axle (1), finally output power to wheels (3).

Dual-motor regenerative braking mode in reverse state: No. 1 bidirectional controllable overrunning clutch (9) works in reverse overrunning state, No. 2 bidirectional controllable overrunning clutch (14) works in reverse overrunning state, No. 1 motor (18) and No. 2 motor (12) work in the power generation mode, and the inertial torque of the vehicle is input to the In the planetary gear mechanism (6), part of the energy passes through the sun gear (16) and drives the No. ) rotates to recover braking energy.

The No. 1 speed changer (17) can be a speed changer or a speed reducer with a fixed transmission ratio, which outputs the power output from the No. 1 motor (18) to the ring gear (8). Speed shift stage or deceleration shift stage, the speed reducer can also be canceled as required.

No. two speed changer (13) can be speed changer, also can be the speed reducer of fixed gear ratio, and it can have a plurality of gear stages, the power output from No. two motor (12) is exported to sun gear (16), the speed changer's A plurality of shifting stages may have at least an increasing shifting stage or a decelerating shifting stage, and the speed reducer may also be canceled as required.

The dual-motor power source is not limited to a motor, but may also be a combination of an engine or other power sources, and the characteristics of the two power sources may be the same or different. The device connected behind the planet carrier (5) is not limited to the main speed reducer (4). Connecting the final drive (4) behind the planetary carrier (5) can be used for the drive of traditional vehicles; connecting the drive wheels behind the planetary carrier (5), and using two sets of the drive assembly to realize the double-sided independent transmission of the vehicle to meet Power requirements for high-power vehicles with double-sided independent transmission.

The No. 1 bidirectional controllable overrunning clutch (9) and the No. 2 bidirectional controllable overrunning clutch (14) can be replaced by two unidirectional controllable overrunning clutches respectively.

From the above working principle, it can be seen that the dual-motor multi-mode coupling drive structure can realize multiple working modes of two-motor independent drive, dual-motor speed-coupling drive, two-motor independent braking energy recovery, and dual-motor speed-coupling braking energy recovery. , can meet the power requirements of the vehicle, the mode switching has no impact, the precision requirement for the motor torque control is low, and the transmission system efficiency is high.

Claims (4)

1. A dual-motor multi-mode speed coupling drive assembly, consisting of drive axle (1), differential (2), wheels (3), final reducer (4), planetary gear mechanism (6), No. 1 two-way Controllable overrunning clutch (9), casing (11), No. two motor (12), No. two speed changer (13), No. two two-way controllable overrun clutch (14), No. one speed changer (17), No. one motor ( 18), wherein the planetary gear mechanism (6) is composed of a planetary gear (7), a ring gear (8), a planetary carrier (5), and a sun gear (16). The working mode of the No. 1 two-way controllable overrunning clutch (9) It is controlled by No. 1 shift fork (10), and the working mode of No. 2 two-way controllable overrunning clutch (9) is controlled by No. 2 shift fork (15). It is characterized in that: the power sent by No. 2 motor (12) passes through No. (13), the No. 2 two-way controllable overrunning clutch (14) is output to the planetary gear mechanism (6), and the power output by the No. 1 motor (18) is output to the planetary gear mechanism (6) through the No. 1 transmission (17). The power of the motor (12) and the No. 1 motor (18) is output to the wheels ( 3). 2. A dual-motor multi-mode rotational speed coupling drive assembly according to claim 1, characterized in that: the working mode of the No. 1 motor (18) is divided into the forward state and the driving mode of the next No. 1 motor (18) and the forward state The next motor (18) braking energy recovery mode of operation and the driving mode of the next motor (18) in the reverse state and the power generation mode of the next motor (18) in the reverse state, and the motor No. 1 (18) in the forward state In the working mode, the No. 2 shift fork (15) is controlled to make the No. 2 two-way controllable overrunning clutch (14) work in a two-way locking state, and the sun gear (16) is locked. At the same time, the No. 1 shift fork (10) is controlled to make a The No. 2 bidirectional controllable overrunning clutch (9) works in the forward overrunning state. When the No. 1 motor (18) works in the reverse state, it controls the No. 2 shift fork (15) to make the No. 2 bidirectional controllable overrunning clutch (14) work. In the two-way locking state, the sun gear (16) is locked, and at the same time, the No. 1 shift fork (10) is controlled to make the No. 1 bi-directional controllable overrunning clutch (9) work in the reverse overrunning state; Wherein in the forward state and the reversing state, under No. 1 motor (18) driving mode, No. 1 motor (18) works in electric mode, No. 2 motor (12) stops working, and No. 1 motor (18) outputs power through No. 1 Transmission (17), ring gear (8), planet carrier (5), final drive (4), differential (2), output to drive axle (1), and finally output power to wheels (3); When the No. 1 motor (18) brake energy recovery mode in the forward state and the reverse state, the No. 1 motor (18) works in the power generation mode, and the No. 2 motor (12) stops working, and the inertial torque of the vehicle passes through the wheels (3 ), drive axle (1), differential (2), final reducer (4), planetary carrier (5), ring gear (8), and drag No. 1 motor (18) to rotate to recover braking energy. 3. A dual-motor multi-mode rotational speed coupling drive assembly according to claim 1, characterized in that: the No. 2 motor (12) operating mode is divided into the No. 2 motor (12) driving mode under the forward state and the forward state Under No. 2 motor (12) braking energy recovery mode and No. 2 motor (12) driving mode under the reversing state and No. 2 motor (12) power generation mode under the reversing state, No. 2 motor (12) In the working mode, control No. 2 shift fork (15) to make No. 2 two-way controllable overrunning clutch (14) work in the positive overrunning state, and control No. 1 shift fork (10) to make No. 1 two-way controllable overrunning clutch (9) Working in the locked state, the ring gear (8) is locked, and in the working mode of the No. 2 motor (12) in the reverse state, the No. 2 shift fork (15) is controlled to make the No. In the reverse overrunning state, simultaneously control the No. 1 shift fork (10) to make the No. 1 bidirectional controllable overrunning clutch (9) work in a bidirectional locking state, and lock the ring gear (8); Wherein in the forward state and the reversing state, under No. two motor (12) driving mode, No. two motor (12) works in electric mode, and No. one motor (18) stops working, and No. two motor (12) outputs power through No. two Transmission (13), sun gear (16), planet carrier (5), final drive (4), differential gear (2), output to drive axle (1), and finally output power to wheels (3); In the forward state and reverse state, the No. 2 motor (12) works in the braking energy recovery mode, the No. 2 motor (12) works in the power generation mode, and the No. 1 motor (18) stops working. (3), drive axle (1), differential (2), final reducer (4), planetary carrier (5), sun gear (16), drag No. 2 motor (12) to rotate, and perform braking energy Recycle. 4. A dual-motor multi-mode speed coupling drive assembly according to claim 1, characterized in that: the dual-motor speed coupling operation mode is divided into speed coupling drive operation mode and speed coupling braking energy recovery work when the vehicle is in the forward state mode and the speed coupling driving mode and the speed coupling braking energy recovery mode when the vehicle is in reverse state, in the forward state dual motor mode, control the No. The controllable overrunning clutch (9) and the No. 2 two-way controllable overrunning clutch (14) work in the forward overrunning state, and in the reverse state, under the dual-motor working mode, control the No. 1 shift fork (10) and the No. 2 shift fork (15 ) making the No. 1 two-way controllable overrunning clutch (9) and the No. two two-way controllable overrunning clutch (14) work in the reverse overrunning state; Wherein, in the rotational speed coupled driving mode, the No. 1 motor (18) and the No. 2 motor (12) work in the electric mode, and the output power of the No. 1 motor (18) is input through the No. 1 transmission (17), the ring gear (8), and the To the planetary gear mechanism (6), the output power of No. two motors (12) is input to the planetary gear mechanism (6) through the No. two speed changer (13), the sun gear (16), and the planetary gear mechanism (6) tells the The power is output to the final drive (4), the differential (2) via the planet carrier (5), then to the drive axle (1), and finally to the wheels (3); In the speed coupling braking energy recovery mode, the No. 1 motor (18) and the No. 2 motor (12) work in the power generation mode, and the inertial torque of the vehicle passes through the wheels (3), drive axle (1), differential ( 2), the main reducer (4) and the planetary carrier (5) are input to the planetary gear mechanism (6), and part of the energy is rotated by the sun gear (16) and the No. 2 motor (12) for braking energy recovery. The other part of the energy passes through the ring gear (8) and drives the No. 1 motor (18) to rotate to recover braking energy.