CN217944878U

CN217944878U - Coaxial drive arrangement and vehicle

Info

Publication number: CN217944878U
Application number: CN202222318148.2U
Authority: CN
Inventors: 占华龙; 任亚楠; 蓝晓东; 李超
Original assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zhejiang Zeekr Intelligent Technology Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zhejiang Zeekr Intelligent Technology Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-12-02
Anticipated expiration: 2032-08-31

Abstract

The utility model provides a coaxial drive arrangement and vehicle, wherein coaxial drive arrangement includes: the device comprises a shell support frame, a driving motor, a composite planet carrier, an NW planet row gear train and a differential gear train; the driving motor is arranged on the shell supporting frame; the compound planet carrier is rotatably arranged on the shell supporting frame; the NW planetary gear train is arranged on the composite planet carrier, a rotation center inner cavity is arranged inside the NW planetary gear train, and the NW planetary gear train is connected with the driving motor; the differential gear train is arranged on the composite planet carrier and is positioned in the rotary central cavity, and the outer diameter of the running track of the differential gear train is larger than the inner diameter of the running track of the NW planetary gear train; the driving motor, the compound planet carrier, the NW planet row gear train and the differential gear train are coaxially arranged. The utility model discloses be used for improving the radial big problem of axial dimensions that current coaxial drive arrangement exists.

Description

Coaxial drive arrangement and vehicle

Technical Field

The utility model relates to a vehicle drive field, concretely relates to coaxial drive arrangement and vehicle.

Background

With further tightening of global carbon emission policies and increasing of popularization strength of national pure electric new energy automobiles, an electric drive assembly with better performance and arrangement needs to be sought so as to be applied to development of pure electric automobile types. At present, an electric drive power assembly is divided into two types of a parallel shaft and a coaxial shaft, the coaxial shaft has the characteristics of convenient arrangement, particularly the coaxial planetary row also has the characteristics of high power density and the like. However, the conventional coaxial driving device has the problems of large radial dimension and large axial dimension.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages of the prior art, the present invention provides a coaxial driving device and a vehicle, so as to improve the problem of large radial and axial dimensions of the existing coaxial driving device.

To achieve the above and other related objects, the present invention provides a coaxial driving apparatus, including: the device comprises a shell support frame, a driving motor, a composite planet carrier, an NW planet row gear train and a differential gear train; the driving motor is arranged on the shell supporting frame; the composite planet carrier is rotatably arranged on the shell supporting frame; the NW planetary gear train is arranged on the compound planet carrier, a rotation center inner cavity is arranged in the NW planetary gear train, and the NW planetary gear train is connected with the driving motor; the differential gear train is arranged on the composite planet carrier and positioned in the rotary central cavity, and the outer diameter of the running track of the differential gear train is larger than the inner diameter of the running track of the NW planetary gear train; the driving motor, the compound planet carrier, the NW planet row gear train and the differential gear train are coaxially arranged.

In an embodiment of the present invention, the differential gear train includes: differential planet wheel and side gear, differential planet wheel rotate install in on the compound planet carrier, differential planet wheel with side gear meshes.

In an embodiment of the present invention, the NW planetary gear train includes: the sun gear is connected with an output shaft of the driving motor, the tower type duplex gear planet gear is meshed with the sun gear, and the inner gear ring is meshed with the tower type duplex gear planet gear.

The utility model discloses an in the embodiment, the ring gear install in on the casing support frame, compound planet carrier is located the inside of ring gear.

The utility model discloses an embodiment, the differential train includes a plurality of differential planet wheel, NW planet row wheel system includes the tower pair tooth planet wheel of a plurality of, the quantity of tower pair tooth planet wheel with the quantity of differential planet wheel is corresponding.

The utility model discloses an in the embodiment, the quantity of tower pair tooth planet wheel with the quantity of differential planet wheel equals.

The utility model discloses an in the embodiment, each tower pair tooth planet wheel includes big planet wheel and little planet wheel, big planet wheel with little planet wheel coaxial coupling, big planet wheel with the sun gear meshing, little planet wheel with the ring gear meshing, little planet wheel with the equidistant arrangement in turn of differential planet wheel.

The utility model discloses an in the embodiment, compound planet carrier includes the planet carrier casing, be provided with first planet carrier on the planet carrier casing and support position, big planet wheel and support position, little planet wheel and support position, sun gear and support position and differential planet wheel and support the position.

In an embodiment of the present invention, the housing supporting frame includes: the motor comprises a shell, wherein a second planet carrier supporting position, a first motor rotor supporting position, a second motor rotor supporting position, an inner gear ring supporting position and a motor stator supporting position are arranged on the shell.

A vehicle is provided with the coaxial driving device.

The utility model discloses coaxial drive arrangement, differential train are located the centre of rotation intracavity that the NW planet arranged the train, and the differential train imbeds the inside less axial dimension that realizes of planet row, and less axial dimension is favorable to arranging of whole car drive semi-axis, is favorable to arranging of front wheel steering engine. Meanwhile, the outer diameter of the running track of the differential gear train is larger than the inner diameter of the running track of the NW planet row gear train, so that the radial size of the whole device is reduced, a smaller radial size can bring a higher ground clearance, a more free Z-direction arrangement space is provided, and the motor controller is more convenient to integrate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a coaxial driving device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an NW planetary gear train according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a differential gear train according to an embodiment of the present invention;

fig. 4 is a layout diagram of the planet wheel of the present invention;

FIG. 5 is a schematic diagram of a compound carrier according to an embodiment of the present invention;

fig. 6 is a schematic view of a housing support according to an embodiment of the present invention;

description of the element reference numerals

1. A coaxial drive; 2. an NW planet gear train; 21. a sun gear; 22. a tower type duplex-tooth planet wheel; 221. a large planet wheel; 222. a small planet wheel; 23. an inner gear ring; 3. a differential gear train; 31. a differential planet gear; 32. a side gear; 33. ball-jointing; 4. a compound planet carrier; 41. a planet carrier housing; 42. a first carrier support station; 43. a small planet wheel supporting position; 44. a large planet wheel supporting position; 45. a sun gear support position; 46. a differential planet wheel support; 5. a drive motor; 51. a motor stator; 52. a motor rotor; 6. a housing support frame; 61. a second planet carrier support location; 62. a first motor rotor support location; 63. a second motor rotor support location; 64. an inner gear ring supporting position; 65. motor stator support position.

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the present invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.

It should be understood that the terms "upper", "lower", "left", "right", "middle" and "one" used herein are for clarity of description, and are not intended to limit the scope of the invention, but rather the scope of the invention.

Referring to fig. 1 to 4, to achieve the above and other related objects, the present invention provides a coaxial driving device 1, comprising: the device comprises a shell support frame 6, a driving motor 5, a composite planet carrier 4, an NW planet row gear train 2 and a differential gear train 3; wherein, the driving motor 5 is arranged on the shell support frame 6; the compound planet carrier 4 is rotatably arranged on the shell supporting frame 6; the NW planetary gear train 2 is arranged on the compound planet carrier 4, a rotation center inner cavity is arranged inside the NW planetary gear train 2, and the NW planetary gear train 2 is connected with the driving motor 5; the differential gear train 3 is arranged on the compound planet carrier 4 and is positioned in the rotary central cavity, and the outer diameter of the running track of the differential gear train 3 is larger than the inner diameter of the running track of the NW planet row gear train 2; the drive motor 5, the compound carrier 4, the NW planetary gear train 2, and the differential gear train 3 are coaxially disposed.

Referring to fig. 3, in an embodiment of the present invention, the differential gear train 3 includes: differential planet wheels 31 and a side gear 32, wherein the differential planet wheels 31 are rotatably arranged on the compound planet carrier 4, and the differential planet wheels 31 are meshed with the side gear 32.

Referring to fig. 2 and 4, in an embodiment of the present invention, the NW planetary gear train 2 includes: the sun gear 21 is connected with an output shaft of the driving motor 5, the tower type duplex gear planet gear 22 is meshed with the sun gear 21, and the inner gear ring 23 is meshed with the tower type duplex gear planet gear 22.

Referring to fig. 1 to 4, the nw planetary gear train 2 is disposed coaxially with the differential gear train 3, the compound planet carrier 4 and the driving motor 5, and the differential gear train 3 is disposed in the inner cavity of the rotation center thereof. The NW planetary gear train 2 includes a sun gear 21, a tower-type double-tooth planet gear 22, and an inner gear ring 23. The sun gear 21 is connected with the motor rotor 52 in an integrally rotating manner, and the connection manner includes a spline, namely, the sun gear is arranged on the motor rotor in a spline manner, and an integral shaft, namely, a sun rotor is processed with a sun gear tooth form and the like. The tower-type duplex-tooth planet wheel 22 comprises large planet wheels 221 and small planet wheels 222, the number of the large planet wheels 221 and the number of the small planet wheels 222 are equal to that of the differential planet wheels 31 of the differential gear train 3, the preferred number is 3, the large planet wheels 221 and the small planet wheels 222 are uniformly arranged in the circumferential direction, the large planet wheels 221 are meshed with the sun wheel 21, the small planet wheels 222 are meshed with the inner gear ring 23, two sides of the small planet wheels are supported on the composite planet carrier 4 in a rolling bearing mode, and two sides of the small planet wheels are respectively arranged on the tower-type planet wheel supporting position 43 and the tower-type planet wheel supporting position 44. The inner gear ring 23 is arranged on the housing support frame 6 in a circumferential and axial fixed connection manner, and in order to realize floating load balancing when engaged with the small planetary gear 222, an inner gear ring floating manner is adopted, that is, the inner gear ring is allowed to float in the radial direction. The compound planet carrier 4 is located inside the ring gear 23.

Referring to fig. 1, fig. 3 and fig. 4, in an embodiment of the present invention, the differential gear train 3 includes a plurality of differential planet wheels 31, the NW planet gear train 2 includes a plurality of tower type duplex gear planet wheels 22, and the number of the tower type duplex gear planet wheels 22 corresponds to the number of the differential planet wheels 31. Correspondingly, the number of the differential planet wheels 31 can be integral multiple of the number of the tower type duplex-tooth planet wheels 22, and the integral is greater than or equal to 1.

Referring to fig. 1 to 4, the differential gear train 3 is disposed coaxially with the NW planetary gear train 2, the compound carrier 4 and the driving motor 5, supported on the compound carrier 4 by a sliding bearing, located in the rotation center cavity of the NW planetary gear train 2, and includes differential planet wheels 31, side gears 32 and balls 33, the number of the differential planet wheels 31 is equal to the number of the tower double-tooth planet wheels 22, preferably 3, and circumferentially alternate with the tower double-tooth planet wheels 22, and supported on the differential planet wheel support holes 46 of the compound carrier 4 and the balls 33 in a relative rotation manner, and the connection manner may be a rolling bearing or a sliding bearing, preferably a sliding bearing, the side gears 32 are engaged with all the differential planet wheels 31, and mesh with a tooth-shaped bevel gear, preferably a straight bevel gear, to output power from the driving motor 5 to the wheel end, or to drive the driving motor 5 by energy feedback value from the wheel end. By adopting the design that the number of planet gears in the planet row is equal to that of the planet gears in the differential mechanism, the planet gears in the planet row and the planet gears in the differential mechanism can be arranged at equal angular intervals in the circumferential direction, so that better dynamic balance is realized; meanwhile, the planet gears of the planet row can avoid the interference of the composite planet carrier, and the smaller radial size is realized by utilizing the window space of the differential planet gear.

Referring to fig. 2 and fig. 3, in an embodiment of the present invention, each of the tower-type double-tooth planet wheels 22 includes a large planet wheel 221 and a small planet wheel 222, the large planet wheel 221 is coaxially connected with the small planet wheel 222, the large planet wheel 221 is engaged with the sun wheel 21, and the small planet wheel 222 is engaged with the inner gear ring 23. A gap is formed between every two adjacent differential planet wheels 31, a plurality of gaps are formed by the plurality of differential planet wheels 31, and the small planet wheels are at least partially positioned in the corresponding gaps. When the number of the tower-type double-tooth planet wheels 22 is equal to that of the differential planet wheels 31, that is, the number of the small planet wheels is equal to that of the differential planet wheels 222, the small planet wheels 222 and the differential planet wheels 31 are alternately arranged at equal intervals.

Referring to fig. 5, in an embodiment of the present invention, the compound planet carrier 4 includes a planet carrier housing 41, and the planet carrier housing 41 is provided with a first planet carrier supporting position 42, a large planet wheel supporting position 44, a small planet wheel supporting position 43, a sun wheel supporting position 45, and a differential planet wheel supporting position 46.

Referring to fig. 1, 3 and 5, the compound planet carrier 4 is coaxially arranged with the NW planetary gear train 2, the differential gear train 3 and the driving motor 5, and is supported on the housing support system 6 in a relative rotation manner, preferably by a rolling bearing, and substantially coincides with the NW planetary gear train 2 and the differential gear train 3 in an axial dimension, and comprises a planet carrier housing 41, a planet carrier support position 42, a tower planetary gear support position 43, a tower planetary gear support position 44, a sun gear support position 45 and a differential planetary gear support position 46, all of which are preferably supported by a rolling bearing. Planet carrier 41 provides the integration of all support positions, planet carrier support position 42 and sun gear support position 45 are coaxial in NW planet row train 2, differential gear 3 and driving motor 5 arrange, planet carrier support position 42 is connected with casing braced system 6 with the antifriction bearing mode, sun gear support position 45 is connected with sun gear 21 with the antifriction bearing mode, tower planet wheel support position 43 and tower planet wheel support position 44 quantity and tower pair tooth planet wheel 22 are equal and coaxial arranging, support in tower pair tooth planet wheel 22 both sides, differential planet wheel support position 46 quantity equals with differential planet wheel 31 quantity, support for differential planet wheel 31 provides.

Referring to fig. 1 and 6, the driving motor 5 is disposed coaxially with the NW planetary gear train 2, the differential gear train 3 and the compound planet carrier 4, and includes a motor stator 51 and a motor rotor 52, the motor stator 51 is disposed on the housing support system 6 in a coaxial fixed manner, preferably in an interference connection, through a motor stator support location 65, and the motor rotor 52 is disposed on the housing support system 6 in a relative rotation manner, preferably in a rolling bearing connection, through a motor rotor support location 62 and a motor rotor support location 63.

Referring to fig. 6, in an embodiment of the present invention, the housing supporting frame 6 includes: the motor stator support device comprises a shell, wherein a second planet carrier support position 61, a first motor rotor support position 62, a second motor rotor support position 63, an inner gear ring support position 64 and a motor stator support position 65 are arranged on the shell. The housing may consist of 2 to 4 sub-housings, preferably 3 parts.

Compare fig. 1 and fig. 2, can understand the utility model discloses more current drive arrangement, owing to adopt NW planet row train 2, differential train 3 and compound planet carrier 4 sharing axial dimensions, differential train 3 sets up in 2 gyration central cavitys of NW planet row train, and set up simultaneously on compound planet carrier 4, compound planet carrier 4 sets up on casing braced system 6, both satisfy the support demand of the revolution around coaxial drive 1 axis and around self axis rotation of tower pair tooth planet wheel 22 and differential planet wheel 31, can realize less axial dimensions again, be favorable to realizing higher power density and the power assembly arrangement of being convenient for the whole car.

Compare fig. 1 and fig. 4, because adopt tower pair tooth planet wheel 22 and differential planet wheel 31 quantity equal, preferably 3, can realize the even equidistant arrangement in circumference, the dynamic unbalance amount of rotating member has greatly been reduced in the drive arrangement, based on publicly known, dynamic unbalance can produce dynamic unbalance power when rotatory, cause extra fatigue and inefficacy to relevant part, consequently, be favorable to improving the endurance and reliability of part on the power transmission route, and simultaneously, based on publicly known, the vibrations that dynamic unbalance power produced can produce the NVH problem, consequently the utility model discloses be favorable to the promotion of NVH attribute.

Because the tower-type double-tooth planet wheels 22 and the differential planet wheels 31 are equal in number and are arranged alternately, the tower-type double-tooth planet wheels 22 can avoid a shell at the supporting position 46 of the differential planet wheels, and further realize smaller radial size.

A vehicle is provided with the coaxial driving device.

The utility model discloses coaxial drive arrangement, differential gear train 3 are located the centre of rotation intracavity that the NW planet was arranged the

gear train

2, and 3 embedding planets of differential gear train are inside to be realized less axial dimensions, and less axial dimensions is favorable to arranging of putting in order car drive semi-axis, is favorable to arranging of front wheel steering engine. Meanwhile, the outer diameter of the running track of the differential gear train 3 is larger than the inner diameter of the running track of the NW planetary gear train 2, so that the radial size of the whole device is reduced, a smaller radial size can bring a higher ground clearance, a free Z-direction arrangement space is provided, and the motor controller is more convenient to integrate. Therefore, the utility model discloses thereby effectively overcome some practical problems among the prior art and had very high use value and use meaning.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A coaxial drive, comprising:

a housing support frame;

the driving motor is arranged on the shell supporting frame;

the composite planet carrier is rotatably arranged on the shell support frame;

the NW planetary gear train is arranged on the compound planet carrier, a rotation center inner cavity is arranged in the NW planetary gear train, and the NW planetary gear train is connected with the driving motor;

the differential gear train is arranged on the composite planet carrier and positioned in the rotary central cavity, and the outer diameter of the running track of the differential gear train is larger than the inner diameter of the running track of the NW planetary gear train;

wherein the drive motor, the compound planet carrier, the NW planet row gear train and the differential gear train are coaxially arranged.

2. The coaxial drive of claim 1, wherein the differential gear train comprises: differential planet wheel and side gear, differential planet wheel rotate install in on the compound planet carrier, differential planet wheel with side gear meshes.

3. The coaxial drive of claim 2, wherein the NW planetary gear train comprises: the sun gear is connected with an output shaft of the driving motor, the tower type duplex gear planetary gear is meshed with the sun gear, and the inner gear ring is meshed with the tower type duplex gear planetary gear.

4. The coaxial drive of claim 3, wherein the ring gear is mounted on the housing support bracket and the compound planet carrier is located inside the ring gear.

5. The coaxial drive of claim 3, wherein the differential gear train comprises a number of differential planets, the NW planetary gear train comprises a number of tower-type double-tooth planets, and the number of tower-type double-tooth planets corresponds to the number of differential planets.

6. The coaxial drive of claim 5, wherein the number of tower-type double-tooth planet wheels is equal to the number of differential planet wheels.

7. The coaxial driving device as recited in claim 6, wherein each of the tower-type dual-tooth planetary gears comprises a large planetary gear and a small planetary gear, the large planetary gear is coaxially connected with the small planetary gear, the large planetary gear is meshed with the sun gear, the small planetary gear is meshed with the inner gear ring, and the small planetary gear and the differential planetary gear are alternately arranged at equal intervals.

8. The coaxial drive of claim 1, wherein the compound planet carrier comprises a planet carrier housing having a first planet carrier support location, a large planet support location, a small planet support location, a sun support location, and a differential planet support location disposed thereon.

9. The coaxial drive of claim 1, wherein the housing support bracket comprises: the motor comprises a shell, wherein a second planet carrier supporting position, a first motor rotor supporting position, a second motor rotor supporting position, an inner gear ring supporting position and a motor stator supporting position are arranged on the shell.

10. A vehicle, characterized in that the vehicle is provided with a coaxial drive according to any one of claims 1-9.