CN218316222U

CN218316222U - Double-motor coupling planet row type three-gear speed change drive axle

Info

Publication number: CN218316222U
Application number: CN202222313710.2U
Authority: CN
Inventors: 曹建波; 姜杰; 王婧; 陈旭峰
Original assignee: Jiangsu Huayong Composite Materials Co Ltd
Current assignee: Jiangsu Huayong Composite Materials Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-01-17
Anticipated expiration: 2032-08-31

Abstract

The utility model relates to a double-motor coupling planet row type three-gear variable speed drive axle, which comprises a differential mechanism, an output shaft, a first motor driving unit, a second motor driving unit and a transmission assembly; the differential is arranged on the output shaft and drives the output shaft to rotate; the transmission assembly comprises a transmission shaft, a first gear, a second gear, a third gear and a transition shaft; the transmission shaft is driven by the first motor driving unit to rotate independently, or driven by the second motor driving unit to rotate independently, or driven by the first motor driving unit and the second motor driving unit to rotate cooperatively. The utility model has the advantages that: the differential mechanism is driven through the cooperation of the first motor driving unit, the second motor driving unit and the transmission assembly, the combination of two motor schemes is adopted, the requirement of high power of an automobile is met, meanwhile, uninterrupted gear shifting of power can be achieved, and the development of the new energy truck market is promoted.

Description

Double-motor coupling planet row type three-gear speed change drive axle

Technical Field

The utility model relates to a transaxle, in particular to two motor coupling planet row formula third gear transaxles.

Background

With the continuous development of new energy automobile technology, the requirement on the high efficiency of a new energy automobile driving system is continuously improved. Aiming at the new energy automobile market, the power of a single motor is limited, and the high-power requirement of the automobile is difficult to meet.

For example, in patent CN110182036A, an integrated three-gear electric drive system is mentioned, which includes an electronic parking system, a motor controller MCU, a box, and a drive motor, a transmission system, a main reducer, a differential, and a clutch brake device, which are disposed in the box and are sequentially connected in a driving manner, where the motor controller MCU is electrically connected to the drive motor, an output end of the differential is connected to a wheel through a driving half shaft, and is mainly used as an integrated electric drive axle of a pure electric vehicle or a hybrid electric vehicle, and functions such as speed regulation of the drive motor, power gear shifting, electronic parking, differential rotation of the half shaft, and recovery of braking energy are implemented, and functions such as mechanical connection and separation of a gear ring, a planet carrier, and an output shaft, and movement of a planet gear ring and a planet carrier element are implemented. The power transmission path from the driving motor to the half shaft is determined through the clutch braking device, and three forward gears are realized through the planetary mechanism. The system enables the output of the gearbox to be locked through the TCU and the actuating mechanism, and the electronic parking function is achieved.

The driving system mentioned in the above patent is realized by adopting a mode that one motor is matched with two brakes and two clutches, and the switching of three different gears is performed by switching on and off different brakes and switching on and off different clutches, and the gear shifting mode needs to involve different switching actions of four components, namely the brakes and the clutches, so that more components need to be matched in the whole action process, and the action is complicated; in addition, the driving mechanism adopts a single motor for driving, in order to meet the requirement of high power of an automobile, the motor is required to have high power, the volume of the corresponding motor is large, the required installation space is also large, the space for installing the driving system in the automobile is fixed, once the space of the motor is enlarged, the corresponding installation space reserved for other components is limited, therefore, when early design and subsequent installation are carried out, the arrangement, specification selection and the like of each component in the driving system can be influenced, and the volume of the motor can be reduced by selectively reducing the power of the motor in the last selection, so that the final installation requirement is met.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a two motor coupling planet row formula third gear transaxles that compact structure, action are convenient.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a two motor coupling planet row formula three-gear transaxles which innovation point lies in: the device comprises a differential mechanism, an output shaft, a first motor driving unit, a second motor driving unit and a transmission assembly;

the differential is arranged on the output shaft and drives the output shaft to rotate;

the transmission assembly comprises a transmission shaft, a first gear, a second gear, a third gear and a transition shaft, the first gear, the second gear and the third gear are sequentially arranged and meshed with each other, the first gear is fixedly sleeved on the transmission shaft, the second gear is movably sleeved on the transition shaft, the third gear is movably sleeved on the output shaft and connected with the differential mechanism, and the transmission shaft and the transition shaft are both parallel to the output shaft;

the transmission shaft is driven by the first motor driving unit to rotate independently, or driven by the second motor driving unit to rotate independently, or driven by the first motor driving unit and the second motor driving unit to rotate cooperatively.

Further, the first motor driving unit comprises a first motor and a planet row, the planet row comprises a sun gear, a planet carrier and a gear ring, the first motor is directly connected with the gear ring and drives the gear ring to rotate, and the planet carrier is connected with the transmission shaft and drives the transmission shaft to rotate;

the second motor driving unit comprises a second motor, a first driving shaft, a second driving shaft, a fourth gear, a fifth gear and a sixth gear, the fourth gear, the fifth gear and the sixth gear are distributed in parallel and are meshed with each other, the fourth gear is fixedly sleeved on the first driving shaft, the fifth gear is fixedly sleeved on the transition shaft, the sixth gear is fixedly sleeved on the second driving shaft, an output shaft of the second motor is connected with the first driving shaft and drives the first driving shaft to rotate, and the second driving shaft is connected with the sun gear and drives the sun gear to rotate;

a switching component is arranged between the first motor driving unit and the second motor driving unit, and the switching component is used for realizing the independent work of the first motor driving unit or the independent work of the second motor driving unit or the cooperative work of the first motor driving unit and the second motor driving unit.

Further, the switching component comprises a shifting fork, the shifting fork is arranged between the gear ring and the second driving shaft, and clamping stagnation of the gear ring or the second driving shaft is achieved through shifting of the shifting fork.

Furthermore, the first driving shaft is arranged on the outer side of the circumference of the output shaft, the first driving shaft and the output shaft are coaxially arranged, the second driving shaft is arranged on the outer side of the circumference of the transmission shaft, and the second driving shaft and the transmission shaft are coaxially arranged.

The utility model has the advantages that: the differential mechanism is driven through the cooperation of the first motor driving unit, the second motor driving unit and the transmission assembly, the combination of two motor schemes is adopted, the requirement of high power of an automobile is met, meanwhile, uninterrupted gear shifting of power can be achieved, and the development of the new energy truck market is promoted.

The switching assembly is adopted for switching between the first motor driving unit and the second motor driving unit, switching can be achieved only through the matching of the shifting forks, the whole switching process is convenient, the action of a plurality of parts does not need to be designed, and the switching assembly is very convenient and fast.

The design of adopting the bi-motor satisfies the demand of high power to can adopt high rotational speed low torque motor to single motor, reduce the volume of single motor, when the installation in addition, can make full use of axial, radial space to the great motor of volume and differential mechanism and install, make the compacter of holistic structure, reduce occupation space.

Through designing a plurality of intermeshing's gear to the size and the number of teeth of accessible control gear realize different speed ratios, with the speed ratio requirement under the satisfying different operating modes.

To the design of first drive shaft, second drive shaft, coaxial setting is in the outside of output shaft, transmission shaft respectively, can utilize the space around output shaft, the transmission shaft to install, reduces the required space of integral erection for the structure is compacter.

Drawings

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

Fig. 1 is a schematic view of the double-motor coupling planet row type three-gear transaxle of the present invention.

Detailed Description

The following examples will provide those skilled in the art with a more complete understanding of the present invention, but are not intended to limit the scope of the present invention to the examples described herein.

The double-motor coupling planet-row type three-gear speed change drive axle shown in fig. 1 comprises a differential 15, an output shaft 17, a first motor drive unit, a second motor drive unit, a transmission assembly and a switching assembly.

The differential 15 is mounted on the output shaft 17, and the output shaft 17 is driven by the differential 15 to rotate, and both sides of the output shaft 17 are respectively connected with wheels, so that the wheels rotate.

The transmission assembly comprises a transmission shaft 9, a first gear 8, a second gear 10, a third gear 13 and a transition shaft 12, wherein the first gear 8, the second gear 10 and the third gear 13 are sequentially arranged and mutually meshed, the first gear 8 is fixedly sleeved on the transmission shaft 9, the second gear 10 is movably sleeved on the circumferential outer wall of the transition shaft 12 through the matching of a bearing, namely, when the second gear 10 rotates, the transition shaft 12 does not need to rotate, the third gear 13 is movably sleeved on an output shaft 17 through the matching of the bearing, namely, the third gear 13 does not directly drive the output shaft 17 to rotate, the third gear 13 can be directly connected with the output shaft 17 through a through hole which the output shaft 17 passes at the middle position of the third gear 13 except through the matching of the bearing, so that the third gear 13 is directly not contacted with the output shaft 17, one side of the third gear 13 is connected with a differential 15 and drives the differential 15 to work, the transmission shaft 9 and the transition shaft 12 are both parallel to the output shaft 17, and the transmission shaft 9, the transition shaft 12 and the output shaft 17 are sequentially distributed.

The utility model discloses in, transmission shaft 9 has three kinds of mode, and first mode is that transmission shaft 9 is rotated by first motor drive unit individual drive, and second kind of mode is that transmission shaft 9 is rotated by second motor drive unit individual drive, and third kind of mode is that transmission shaft 9 is rotated by first motor drive unit and second motor drive unit collaborative drive.

The first motor driving unit comprises a first motor 1 and a planet row, the planet row comprises a sun wheel 5, planet wheels 3, a planet carrier 4 and a gear ring 2, the sun wheel 5 is positioned at the center, the center of the sun wheel 5 is provided with a center hole, the planet wheels 3 are provided with a plurality of parts which are respectively distributed on the outer side of the circumference of the sun wheel 5, the planet wheels 3 are meshed with the sun wheel 5, each planet wheel 3 is arranged on the same planet carrier 4, the gear ring 2 is positioned on the outer side of all the planet wheels 3, the inner wall of the gear ring 2 is provided with inner teeth which are respectively meshed with each planet wheel, the first motor 1 is directly connected with the gear ring 2, the first motor 1 directly drives the gear ring 2 to rotate, the planet carrier 4 is connected with a transmission shaft 9, the transmission shaft 9 is driven by the planet carrier 4 to rotate, and the transmission shaft 9 is connected with the planet carrier 4 after penetrating through the center hole of the sun wheel 5.

The second motor driving unit comprises a second motor 16, a first driving shaft 18, a second driving shaft 19, a fourth gear 14, a fifth gear 11 and a sixth gear 7, wherein the fourth gear 14, the fifth gear 11 and the sixth gear 7 are distributed in parallel and are meshed with each other, the fourth gear 14 is fixedly sleeved on the first driving shaft 18, the fifth gear 11 is fixedly sleeved on the transition shaft 12, the sixth gear 7 is fixedly sleeved on the second driving shaft 19, an output shaft of the second motor 16 is connected with the first driving shaft 18, the second motor 16 drives the first driving shaft 18 to rotate, the second driving shaft 19 is connected with the sun wheel 5, and the second driving shaft 19 drives the sun wheel 5 to rotate.

First drive shaft 18 sets up the circumference outside at output shaft 17, and first drive shaft 18 and output shaft 17 coaxial arrangement, first drive shaft 18 is the equal open-ended hollow shaft structure in both sides, output shaft 17 passes from first drive shaft 18, and be provided with the bearing between first drive shaft 18 and the output shaft 17, the bearing has at least two, be located the both sides of first drive shaft 18 respectively, second drive shaft 19 sets up the circumference outside at transmission shaft 9, and second drive shaft 19 and the coaxial setting of transmission shaft 9, second drive shaft 19 is the equal open-ended hollow shaft structure in both sides, transmission shaft 9 passes from second drive shaft 19, and be provided with the bearing between second drive shaft 19 and the transmission shaft 9, the bearing has at least two, be located the both sides of second drive shaft 19 respectively. For the design of first drive shaft 18, second drive shaft 19, coaxial setting is in the outside of output shaft 17, transmission shaft 9 respectively, can utilize the space around output shaft 17, transmission shaft 9 to install, reduces the required space of whole installation for the structure is compacter.

A switching component is arranged between the first motor driving unit and the second motor driving unit, and the switching component can realize the independent work of the first motor driving unit or the independent work of the second motor driving unit or the cooperative work of the first motor driving unit and the second motor driving unit, the switching component comprises a shifting fork 6, the shifting fork 6 is arranged between the gear ring 2 and the second driving shaft 19, and the clamping stagnation of the gear ring 2 or the second driving shaft 19 can be realized through the shifting of the shifting fork 6, when the gear ring 2 is matched with the shifting fork 6, a tooth-shaped structure can be designed on the circumferential outer wall of the gear ring 2 to be matched with the shifting fork 6, the clamping of the shifting fork 6 to the gear ring 2 can be realized, for the matching of the second driving shaft 19 and the shifting fork 6, a fixed gear can be connected on the circumferential outer wall of the second driving shaft 19, the tooth-shaped structure is matched with the shifting fork 6, and the clamping of the shifting fork 6 to the second driving shaft 19 can be realized. The switching assembly is adopted for switching between the first motor driving unit and the second motor driving unit, switching can be achieved only through the matching of the shifting fork 6, the whole switching process is convenient to compare, the action of a plurality of parts does not need to be designed, and the switching device is very convenient and fast.

The working principle is as follows: first motor 1 during operation, first motor 1 drives ring gear 2 and rotates, ring gear 2's rotation can drive planet wheel 3 and rotate, and planet wheel 3's rotation can drive planet carrier 4 and rotate, planet carrier 4 then drives transmission shaft 9 and rotates, and transmission shaft 9 is then through intermeshing's first gear 8, second gear 10, the cooperation drive differential mechanism 15 work of third gear 13, because swing joint between second gear 10 and the transition axle 12, therefore when second gear 10 rotates, transition axle 12 can not rotate, and differential mechanism 15 final drive output shaft 17 rotates.

When the second motor 16 works, the second motor 16 drives the first driving shaft 18 to rotate, the first driving shaft 18 can drive the second driving shaft 19 to rotate through the cooperation of the fourth gear 14, the fifth gear 11 and the sixth gear 7 which are meshed with each other, the fifth gear 11 can drive the transition shaft 12 to rotate when rotating, and the transition shaft 12 is movably connected with the second gear 10, so that the second gear 10 cannot be driven to rotate by the rotation of the transition shaft 12, the sun gear 5 can be driven to rotate by the rotation of the second driving shaft 19, the planet gear 3 can be driven to rotate by the rotation of the sun gear 5, the planet gear 4 can be driven to rotate by the rotation of the planet gear 3, the planet carrier 4 drives the transmission shaft 9 to rotate, the differential 15 can be driven to work through the cooperation of the first gear 8, the second gear 10 and the third gear 13 which are meshed with each other, and the differential 15 finally drives the output shaft 17 to rotate.

The utility model provides an output shaft 17's three kinds of mode do:

the first mode of operation: stir shift fork 6 right, shift fork 6 can cooperate with second drive shaft 19 this moment, the realization dies the card of second drive shaft 19, and second drive shaft 19 does not rotate the time, sun gear 5 does not rotate, and sixth gear 7 also can't rotate, this can lead to second motor 16 unable drive work this moment, and first motor 1 still can drive planet wheel 3 through ring gear 2 and rotate, and the rotation of planet wheel 3 can drive the brill hole of planet carrier 4, and then drive transmission shaft 9 and rotate, finally realize output shaft 17's rotation, output shaft 17 only is power input by first motor 1 this moment.

A second mode of operation: stir shift fork 6 left, shift fork 6 can cooperate with ring gear 2 this moment, the realization is died to the card of ring gear 2, and ring gear 2 does not rotate the time, directly result in first motor 1 can't drive work, and second motor 16 still can be through first drive shaft 18, fourth gear 14, fifth gear 11, sixth gear 7, the cooperation drive sun gear 5 of second drive shaft 19 rotates, and the rotation of sun gear 5 can drive the rotation of planet wheel 3, the rotation of planet wheel 3 will drive planet carrier 4 and rotate, finally still can realize the rotation of output shaft 17, output shaft 17 only is power input by second motor 16 this moment.

The third mode of operation: the shifting fork 6 does not act, namely, the gear ring 2 and the second driving shaft 19 cannot be clamped, the gear ring 2 and the second driving shaft 19 both realize smooth rotation, and at the moment, the output shaft 17 is matched with the first motor 1 and the second motor 16 to be used as power input.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a bi-motor coupling planet row formula third gear transaxle which characterized in that: the differential mechanism comprises a differential mechanism, an output shaft, a first motor driving unit, a second motor driving unit and a transmission assembly;

the transmission assembly comprises a transmission shaft, a first gear, a second gear, a third gear and a transition shaft, wherein the first gear, the second gear and the third gear are sequentially arranged and meshed with each other;

2. The double-motor-coupled planetary gear-train type three-speed transaxle of claim 1, wherein: the first motor driving unit comprises a first motor and a planet row, the planet row comprises a sun gear, a planet carrier and a gear ring, the first motor is directly connected with the gear ring and drives the gear ring to rotate, and the planet carrier is connected with the transmission shaft and drives the transmission shaft to rotate;

3. The double-motor coupled planetary gear train type three-speed transaxle of claim 2, wherein: the switching component comprises a shifting fork, the shifting fork is arranged between the gear ring and the second driving shaft, and clamping stagnation of the gear ring or the second driving shaft is realized through shifting of the shifting fork.

4. The double-motor-coupled planetary gear-train type three-speed transaxle of claim 2, wherein: the first driving shaft is arranged on the outer side of the circumference of the output shaft and is coaxially arranged with the output shaft, the second driving shaft is arranged on the outer side of the circumference of the transmission shaft and is coaxially arranged with the transmission shaft.