CN111409434A - Dual-motor coupling driving system and new energy electric automobile - Google Patents

Abstract

The invention discloses a double-motor coupling driving system and a new energy electric automobile, wherein the double-motor coupling driving system comprises: the main driving motor comprises a first rotating shaft, a front shaft extension end and a rear shaft extension end are formed at two ends of the first rotating shaft, and the front shaft extension end is used for connecting a load; an auxiliary drive motor including a second front shaft extension end; the hydraulic torque converter is used for connecting a second front shaft extension end of the auxiliary driving motor with a rear shaft extension end of the main driving motor; the load is driven by the main driving motor under normal conditions, when the output torque of the main driving motor is insufficient, the auxiliary driving motor is coupled and transmitted to the main driving motor through the hydraulic torque converter, and the torque of the auxiliary driving motor is transmitted to the main driving motor, so that the torques of the main driving motor and the auxiliary driving motor are superposed, and the torque output of the whole driving system is met; the double-motor coupling driving system is simple in structure, the auxiliary driving motor and the main driving motor are coupled through the hydraulic torque converter, reliability is high, and noise is low.

Description

Dual-motor coupling driving system and new energy electric automobile

The technical field is as follows:

the invention relates to a double-motor coupling driving system and a new energy electric automobile.

Background art:

the driving motor systems used by the pure electric vehicles at present have the following three types: the double-motor electric control clutch is coupled with the single-motor drive, the double-motor gear coupling drive and the double-motor electric control clutch. The single motor drive's theory of operation is shown in fig. 1, and single motor drive can only be adapted to a operating mode and can't compromise multiple operating mode owing to receive the restriction of motor performance itself, though can match speed change mechanism and can solve the multiple operating mode problem of adaptation, but speed change mechanism needs the automatically controlled assistance of cooperation, and the structure is complicated, and the comfort level is lower. The working principle of the dual-motor gear coupling driving is shown in fig. 2, multiple groups of gears form an AMT gearbox, and two motors are coupled through the AMT gearbox and then drive a load. The working principle of the coupling drive of the dual-motor electric control clutch is shown in fig. 3, and comprises a starting and generating integrated motor (ISG generator) and a traction motor (TM motor), wherein the ISG generator is controlled by an ISG motor controller, the TM motor is controlled by the TM motor, and the ISG motor drives the TM motor when an automobile is started. The dual-motor gear coupling drive and the dual-motor electric control clutch coupling can meet various working conditions, but have respective defects, the gear transmission structure of the dual-motor gear coupling drive is complex, the reliability is reduced, and the high-speed noise is large; the coupling driving of the double-motor electric control clutch needs to be matched with an electric control device to control the suction state, and the reliability is low.

The invention content is as follows:

the invention aims to provide a double-motor coupling driving system and a new energy electric automobile, and can solve the problems of complex structure and low reliability of the double-motor driving system in the prior art.

The purpose of the invention is realized by the following technical scheme.

A first object of the present invention is to provide a dual-motor coupled driving system, comprising:

the main driving motor comprises a first motor shell, a first stator component, a first rotor component and a first rotating shaft, wherein two ends of the first rotating shaft respectively extend out of the first motor shell to form a front shaft extension end and a rear shaft extension end, and the front shaft extension end is used for connecting a load;

the auxiliary driving motor comprises a second motor shell, a second stator component, a second rotor component and a second rotating shaft, and the front end of the second rotating shaft extends out of the second motor shell to form a second front shaft extending end;

the hydraulic torque converter is used for connecting a second front shaft extension end of the auxiliary driving motor with a rear shaft extension end of the main driving motor;

the load is driven by the main driving motor under the normal condition, when the main driving motor output torque is insufficient, the auxiliary driving motor is coupled and transmitted to the main driving motor through the hydraulic torque converter, the torque of the auxiliary driving motor is transmitted to the main driving motor, so that the torque of the main driving motor and the torque of the auxiliary driving motor are superposed, and the torque output of the whole driving system is met.

The motor controller is used for controlling the main driving motor and the auxiliary driving motor to work.

The first rotating shaft of the main driving motor and the second rotating shaft of the auxiliary driving motor are arranged on the same axis.

The hydraulic torque converter comprises a torque converter shell, a locking clutch, a one-way clutch, a pump impeller, a guide wheel, a turbine and hydraulic oil, wherein the torque converter shell is driven by a second front shaft extension end of an auxiliary driving motor, the outer edge of the torque converter shell is connected with the outer edge of the pump impeller in an installing mode and forms a pump cavity, the guide wheel is sleeved on the one-way clutch, the locking clutch, the turbine, the guide wheel and the hydraulic oil are located in the pump cavity, a rear shaft extension end of a main driving motor penetrates through a through hole in the middle of the pump impeller and extends into the pump cavity, the locking clutch, the turbine and the guide wheel are sequentially installed on the rear shaft extension end from left to right, and the locking clutch, the turbine, the guide wheel and the pump.

The pump wheel comprises a hub and a plurality of first blades which are arranged on the inner wall of the hub at intervals.

The guide wheel comprises a plurality of second blades arranged at intervals, each second blade is connected with an outer wheel disc through an inner wheel disc, one-way clutch is embedded in the inner wheel disc, a first channel for hydraulic oil to flow through is formed between every two adjacent second blades, a plurality of third blades arranged at intervals are arranged in the one-way clutch, and a second channel for the hydraulic oil to flow through is formed between every two adjacent third blades.

The turbine comprises a partition plate, the locking clutch is attached to one side face of the partition plate, a plurality of fourth blades and a plurality of fifth blades are arranged on the other side face of the partition plate, the fourth blades are arranged at intervals and surround to form an inner impeller, the fifth blades are arranged at intervals and surround to form an outer impeller, and the outer impeller protrudes out of an outer wheel disc of the guide wheel in the radial direction.

The outer edge of the partition board protrudes to the direction of the guide wheel to form an arc convex edge.

The curvatures of the first blade, the second blade, the fourth blade and the fifth blade are different.

The second purpose of the invention is to provide a new energy electric automobile, which comprises a double-motor coupling driving system and is characterized in that: the double-motor coupling driving system is the double-motor coupling driving system.

Compared with the prior art, the invention has the following effects:

1) the double-motor coupling driving system is characterized by comprising: the main driving motor comprises a first motor shell, a first stator component, a first rotor component and a first rotating shaft, wherein two ends of the first rotating shaft respectively extend out of the first motor shell to form a front shaft extension end and a rear shaft extension end, and the front shaft extension end is used for connecting a load; the auxiliary driving motor comprises a second motor shell, a second stator component, a second rotor component and a second rotating shaft, and the front end of the second rotating shaft extends out of the second motor shell to form a second front shaft extending end; the hydraulic torque converter is used for connecting a second front shaft extension end of the auxiliary driving motor with a rear shaft extension end of the main driving motor; the load is driven by the main driving motor under normal conditions, when the output torque of the main driving motor is insufficient, the auxiliary driving motor is coupled and transmitted to the main driving motor through the hydraulic torque converter, and the torque of the auxiliary driving motor is transmitted to the main driving motor, so that the torques of the main driving motor and the auxiliary driving motor are superposed, and the torque output of the whole driving system is met; the double-motor coupling driving system is simple in structure, the auxiliary driving motor and the main driving motor are coupled through the hydraulic torque converter, the reliability is high, the noise is low, and the operation is stable.

2) Other advantages of the present invention are described in detail in the examples section.

Description of the drawings:

FIG. 1 is a schematic diagram of a single motor driven by a variator in the prior art;

FIG. 2 is a schematic diagram of a dual motor gear coupling drive in the prior art;

FIG. 3 is a schematic diagram of a dual motor electronically controlled clutch drive in the prior art;

FIG. 4 is a schematic diagram of a dual-motor coupled driving system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the operation of a dual motor coupling drive system;

FIG. 6 is a schematic diagram of a torque converter in a dual motor coupled drive system;

FIG. 7 is a cross-sectional view of the torque converter;

FIG. 8 is an exploded view of the torque converter;

FIG. 9 is an exploded view of another angle of the torque converter;

FIG. 10 is a schematic diagram of a turbine in the torque converter;

FIG. 11 is a schematic view of a torque converter with a combined stator and one-way clutch;

fig. 12 is a cross-sectional view of a two-motor coupled drive system.

The specific implementation mode is as follows:

the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 4 to 12, the present embodiment provides a dual-motor coupling driving system, which is characterized by comprising:

the main driving motor 2 comprises a first motor shell 22, a first stator component 23, a first rotor component 24 and a first rotating shaft 21, wherein two ends of the first rotating shaft 21 respectively extend out of the first motor shell to form a front shaft extension end 212 and a rear shaft extension end 211, and the front shaft extension end 212 is used for connecting a load;

an auxiliary driving motor 1, including a second motor housing 12, a second stator assembly 13, a second rotor assembly 14 and a second rotating shaft 11, wherein the front end of the second rotating shaft 11 extends out of the second motor housing 12 to form a second front shaft extension end 111;

a torque converter 3 for connecting a second front shaft extension end 111 of the auxiliary driving motor 1 and a rear shaft extension end 211 of the main driving motor 2;

the load is driven by main driving motor 2 under normal condition, and when main driving motor 2 output torque is not enough, auxiliary driving motor 1 passes through torque converter 3 coupling transmission to main driving motor 2, transmits auxiliary driving motor 1's moment of torsion for main driving motor 2 and auxiliary driving motor 1's moment of torsion stack satisfies whole actuating system's torque output.

The double-motor coupling driving system is simple in structure, high in reliability and low in noise, and the auxiliary driving motor 1 and the main driving motor 2 are coupled through the hydraulic torque converter 3.

The motor controller 4 is further included, and the motor controller 4 controls the main driving motor 2 and the auxiliary driving motor 1 to work. The motor controller 4 is used for controlling the main driving motor 2 under the normal condition, when the output torque of the main driving motor 2 is insufficient, the motor controller 4 is used for carrying out speed regulation control on the main driving motor 2 and the auxiliary driving motor 1 at the same time, the torque of the main driving motor 2 and the torque of the auxiliary driving motor 1 are coupled through the hydraulic torque converter 3, and the control is simple and accurate.

The first rotating shaft of the main driving motor 2 and the second rotating shaft of the auxiliary driving motor 1 are arranged on the same axis, so that the structure is simplified, and the operation is stable.

The hydraulic torque converter 3 comprises a torque converter shell 31, a locking clutch 32, a one-way clutch 33, a pump impeller 34, a guide pulley 35, a turbine 36 and hydraulic oil 37, wherein the second front shaft extension end 111 of the auxiliary driving motor 1 drives the torque converter shell 31, the outer edge of the torque converter shell 31 is connected with the outer edge of the pump impeller 34 in an installing mode and forms a pump cavity 30, the guide pulley 35 is sleeved on the one-way clutch 33, the locking clutch 32, the turbine 36, the guide pulley 35 and the hydraulic oil 37 are located in the pump cavity 30, the rear shaft extension end 211 of the main driving motor 2 penetrates through a through hole 342 in the middle of the pump impeller 34 and extends into the pump cavity 30, the locking clutch 32, the turbine 36 and the guide pulley 35 are sequentially installed on the rear shaft extension end 211 from left to right, and the locking clutch 32, the turbine 36, the guide pulley 35 and the pump impeller 34 are arranged.

The operating principle of the torque converter 3 is as follows: during normal work, main driving motor 2 works alone, rear shaft extension end 211 drives lock-up clutch 32, turbine 36, guide pulley 35, pump impeller 34 action, and at this moment, built-in hydraulic oil 37 in pump chamber 30 can stir thereupon, and when main driving motor 2 rotational speed risees, hydraulic oil 37 oil pressure also can rise, because one-way clutch 33 is embedded in guide pulley 35, guide pulley 35 can rise along with the oil pressure and follow-up, played the effect of the oil pressure of releasing, avoid main driving motor 2's action to drive auxiliary driving motor 1 action. When the main driving motor 2 needs to be switched in the driving state of the auxiliary driving motor 1, the second front shaft extension end 111 of the auxiliary driving motor 1 drives the pump wheel 34 to rotate through the torque converter shell 31, the oil pressure of the hydraulic oil 37 is continuously increased under the driving of the pump wheel 34, when the rotating speed of the pump wheel 34 is the same as that of the guide wheel 35, the hydraulic pressure between the pump wheel 34 and the guide wheel 35 is balanced, the oil pressure of the hydraulic oil 37 pushes the lock-up clutch 32 to the torque converter shell 31 and attracts, the torque of the auxiliary driving motor 1 is transmitted to the motor 2 through the lock-up clutch 32, the superposition of the torques of the two motors is realized, and the torque of the output shaft of the. The flow direction of the hydraulic oil 37 is shown by the arrow in fig. 4, the hydraulic oil 37 is driven by the pump wheel 34 to flow through the guide wheel 35 and the one-way clutch 33, and at this time, the one-way clutch 33 in the guide wheel 35 plays a role of buffering when the rotation speeds of the main driving motor 2 and the auxiliary driving motor 1 fluctuate (2 rotation speeds deviate from the set value). When the output torque of the driving system does not need to be superposed, the auxiliary driving motor 1 performs speed regulation control through the motor controller 4, the rotating speed and the torque of the auxiliary driving motor 1 are gradually reduced, the hydraulic pressure on two sides of the lock-up clutch 32 in the pump cavity 30 is in a certain difference state, the lock-up clutch 32 is separated from the shell 31 of the torque converter, and the main driving motor 2 works independently.

The pump wheel 34 includes a hub 343 and a plurality of first blades 341 spaced apart from each other on an inner wall of the hub 343.

The guide wheel 35 includes a plurality of second blades 351 spaced apart from each other, each of the second blades 351 is connected to an inner disk 352 and an outer disk 353, the one-way clutch 33 is embedded in the inner disk 352, a first passage 354 for the hydraulic oil to flow through is formed between two adjacent second blades 351, a plurality of third blades 331 spaced apart from each other are provided in the one-way clutch 33, and a second passage 332 for the hydraulic oil to flow through is formed between two adjacent third blades 331. The first and second passages 354, 332 further facilitate the flow of hydraulic oil 37.

The turbine 36 includes a partition 361, the lockup clutch 32 is attached to one side surface of the partition 361, the other side surface of the partition 361 is provided with a plurality of fourth blades 3620 and a plurality of fifth blades 3630, the fourth blades 3620 are arranged at intervals and define an inner impeller 362, the fifth blades 3630 are arranged at intervals and define an outer impeller 363, the outer impeller 363 protrudes out of an outer wheel disk 353 of the guide wheel 35 in the radial direction, and the inner impeller 362 is located between the first passage 354 and the second passage 332 in the radial direction.

The outer edge of the partition 361 protrudes toward the guide wheel 35 to form an arc-shaped protrusion 364. Further enhancing the flow of hydraulic oil 37.

The first blade 341, the second blade 351, the fourth blade 3620, and the fifth blade 3630 have different curvatures. The curvatures of the first, second, fourth, and fifth blades 341, 351, 3620, and 3630 are designed according to the respective operating states, so that the operating reliability of the torque converter 3 is further improved.

Example two:

the embodiment provides a new forms of energy electric automobile, including two motor coupling actuating system 100, its characterized in that: the dual-motor coupling driving system 100 is the dual-motor coupling driving system according to the first embodiment. The new energy electric automobile power system is simple in structure, reliable in operation and low in noise.

The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.

Claims (10)

1. A dual motor coupling drive system, comprising:

the main driving motor (2) comprises a first motor shell (22), a first stator component (23), a first rotor component (24) and a first rotating shaft (21), wherein two ends of the first rotating shaft (21) respectively extend out of the first motor shell (22) to form a front shaft extension end (212) and a rear shaft extension end (211), and the front shaft extension end (212) is used for connecting a load;

the auxiliary driving motor (1) comprises a second motor shell (12), a second stator component (13), a second rotor component (14) and a second rotating shaft (11), wherein the front end of the second rotating shaft (11) extends out of the second motor shell (12) to form a second front shaft extending end (111);

a hydrodynamic torque converter (3) for connecting a second front shaft extension end (111) of the auxiliary drive motor (1) with a rear shaft extension end (211) of the main drive motor (2);

the load is driven by the main driving motor (2) under the normal condition, when the output torque of the main driving motor (2) is insufficient, the auxiliary driving motor (1) is coupled and transmitted to the main driving motor (2) through the hydraulic torque converter (3), and the torque of the auxiliary driving motor (1) is transmitted to the main driving motor (2), so that the torques of the main driving motor (2) and the auxiliary driving motor (1) are superposed, and the torque output of the whole driving system is met.

2. A dual motor coupled drive system according to claim 1, wherein: the motor controller (4) is further included, and the motor controller (4) controls the main driving motor (2) and the auxiliary driving motor (1) to work.

3. A dual-motor coupled driving system according to claim 2, wherein: and a first rotating shaft of the main driving motor (2) and a second rotating shaft of the auxiliary driving motor (1) are arranged on the same axis.

4. A dual motor coupled drive system according to claim 1, 2 or 3, wherein: the hydraulic torque converter (3) comprises a torque converter shell (31), a locking clutch (32), a one-way clutch (33), a pump impeller (34), a guide wheel (35), a turbine (36) and hydraulic oil (37), a second front shaft extension end (111) of the auxiliary driving motor (1) drives the torque converter shell (31), the outer edge of the torque converter shell (31) is connected with the outer edge of the pump impeller (34) in an installing mode and forms a pump cavity (30), the guide wheel (35) is sleeved on the one-way clutch (33), the locking clutch (32), the turbine (36), the guide wheel (35) and the hydraulic oil (37) are located in the pump cavity (30), a rear shaft extension end (211) of the main driving motor (2) penetrates through a through hole (342) in the middle of the pump impeller (34) and extends into the pump cavity (30), the locking clutch (32), the turbine (36) and the guide wheel (35) are sequentially installed on the rear shaft extension end (211) from left to right, the lockup clutch (32), the turbine (36), the guide wheel (35) and the pump wheel (34) are arranged along the rear shaft extension end (211) from left to right.

5. The dual-motor coupled driving system of claim 4, wherein: the pump wheel (34) comprises a hub (343) and a plurality of first blades (341) which are positioned on the inner wall of the hub (343) and arranged at intervals.

6. The dual-motor coupled driving system of claim 5, wherein: the guide wheel (35) comprises a plurality of second blades (351) arranged at intervals, each second blade (351) is connected with an outer wheel disc (353) through an inner wheel disc (352), a one-way clutch (33) is embedded in the inner wheel disc (352), a first channel (354) allowing hydraulic oil to flow through is formed between every two adjacent second blades (351), a plurality of third blades (331) arranged at intervals are arranged in the one-way clutch (33), and a second channel (332) allowing hydraulic oil to flow through is formed between every two adjacent third blades (331).

7. The dual-motor coupled driving system of claim 6, wherein: the turbine (36) comprises a partition plate (361), the locking clutch (32) is attached to one side face of the partition plate (361), a plurality of fourth blades (3620) and a plurality of fifth blades (3630) are arranged on the other side face of the partition plate (361), the fourth blades (3620) are arranged at intervals and surround an inner impeller (362), the fifth blades (3630) are arranged at intervals and surround an outer impeller (363), and the outer impeller (363) protrudes out of an outer wheel disc (353) of the guide wheel (35) in the radial direction.

8. The dual-motor coupled driving system of claim 7, wherein: the outer edge of the partition plate (361) protrudes towards the guide wheel (35) to form an arc-shaped convex edge (364).

9. The dual-motor coupled driving system of claim 8, wherein: the first blade (341), the second blade (351), the fourth blade (3620) and the fifth blade (3630) have different curvatures.

10. The utility model provides a new forms of energy electric automobile, includes two motor coupling actuating system (100), its characterized in that: the dual-motor coupled drive system (100) is as claimed in any one of claims 1 to 9.

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