CN219214726U - Dual electro-mechanical drive assembly and vehicle - Google Patents

Abstract

The application provides a dual-motor electric drive assembly and a vehicle. The dual-motor electric drive assembly includes two motors, two planetary reducers and two output half shafts, two motors, two planetary reducers and two output shafts. One-to-one transmission connection of half shafts; each planetary reducer includes sun gear, first planetary gear, second planetary gear, planet carrier and ring gear, and the sun gear is connected to the motor; the first planetary gear and the second planetary gear One of them meshes with the sun gear, and the other meshes with the ring gear; the planetary carrier is arranged on the side of the second planetary wheel away from the motor, and the planetary carrier is connected with the output half shaft in transmission. The dual-motor electric drive assembly of the present application can realize functions such as differential gear, differential lock, and vector control without additional mechanical structure, and has high power density.

Description

Dual motor electric drive assembly and vehicle

technical field

The present application relates to the technical field of vehicles, in particular to a dual-motor electric drive assembly and a vehicle.

Background technique

At present, with the development of the new energy vehicle industry, electric vehicles have become a development trend, and the performance of electric vehicles has attracted more and more attention. Most of the pure electric vehicles currently on the market use a single motor or front and rear dual motor solutions. Since the above solution requires a single motor to drive and connect two wheels at the same time, the performance requirements for a single motor are relatively high. Moreover, in order to realize functions such as differential, differential lock, and vector control, a large number of mechanical structures need to be added to the single-motor system, which takes up a large space and is bulky and heavy, which limits the development of high-performance electric vehicles.

Utility model content

The present application provides a dual-motor electric drive assembly and a vehicle with high power density.

The present application discloses a dual-motor electric drive assembly, including two motors, two planetary reducers and two output half shafts, two motors, two planetary reducers and two output half shafts The shafts are connected in one-to-one correspondence; each of the planetary reducers includes a sun gear, a first planetary gear, a second planetary gear, a planet carrier and a ring gear, and the sun gear is connected to the motor in transmission; the first planetary gear One of the wheel and the second planetary gear is meshed with the sun gear, and the other is meshed with the ring gear; the planet carrier is arranged on the side of the second planetary wheel away from the motor, and the planetary The frame is in transmission connection with the output half shaft.

Further, the first planetary gear meshes with the sun gear, and the second planetary gear meshes with the ring gear.

Further, the ring gear is located on a side of the second planetary gear away from the output half shaft, and is internally meshed with the second planetary gear.

Further, the planetary reducer further includes a planetary gear shaft, both the first planetary gear and the second planetary gear rotate around the planetary gear shaft, and the planetary gear shaft is in transmission connection with the planetary carrier.

Further, the motor includes a stator and a rotor, and the rotor is in transmission connection with the sun gear through a transmission shaft.

Further, the planetary reducer includes a plurality of the first planetary gears and a plurality of the second planetary gears, and the number of the first planetary gears is equal to the number of the second planetary gears.

Further, the two motors are located between the two planetary reducers, and the two output half shafts are respectively located on both sides of the two planetary reducers.

Further, the two motors, the two reducer assemblies and the two output half shafts are respectively arranged symmetrically.

Further, the dual-motor electric drive assembly further includes wheels, and the output shaft shaft is connected to the wheels.

The present application also discloses a vehicle, including the above-mentioned dual-motor electric drive assembly.

The beneficial effect of the present application is that: the dual-motor electric drive assembly of the present application includes two electric motors, two planetary reducers and two output half shafts. Through the control of two motors, functions such as differential, differential lock, and vector control can be realized without adding mechanical mechanisms, which reduces additional weight and space and improves the overall power of the dual-motor electric drive assembly density.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the specification.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and together with the description serve to explain the principles of the specification.

FIG. 1 is a schematic structural view of the dual-motor electric drive assembly of the present application.

Fig. 2 is a rotational speed diagram of various components of the planetary reducer in Fig. 1 in the straight-running working mode.

Description of reference numerals: 10, motor; 11, stator; 12, rotor; 20, planetary reducer; 21, sun gear; 211, transmission shaft; 22, first planetary gear; 23, second planetary gear; 24, planet frame; 25, ring gear; 26, planetary gear shaft; 30, output half shaft; 31, wheel.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present specification as recited in the appended claims.

The terms used in this specification are for the purpose of describing particular embodiments only, and are not intended to limit the specification. As used in this specification and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

Next, the embodiments of this specification will be described in detail.

As shown in FIG. 1 , the present application provides a dual-motor electric drive assembly, including two motors 10 , two planetary reducers 20 and two output half shafts 30 . The two motors 10, the two planetary reducers 20 and the two output half shafts 30 are connected in a one-to-one corresponding transmission manner.

In this embodiment, the two motors 10 are located between the two planetary reducers 20 , and the two output half shafts 30 are respectively located on both sides of the two planetary reducers 20 . Moreover, the two motors 10 , the two planetary reducers 20 and the two output half shafts 30 are arranged symmetrically.

Each motor 10 includes a stationary stator 11 and a rotating rotor 12 . The rotor 12 can rotate around its own axis. The motor 10 outputs torque to the planetary reducer 20 through a transmission shaft 211 . The transmission shaft 211 is in transmission connection with the rotor 12 , and the transmission shaft 211 is arranged on the rotation axis of the rotor 12 .

Each planetary reducer 20 includes a sun gear 21 , a first planetary gear 22 , a second planetary gear 23 , a planetary carrier 24 , a ring gear 25 and a planetary gear shaft 26 . The sun gear 21 is drivingly connected to the motor 10 through a transmission shaft 211 . One of the first planetary gear 22 and the second planetary gear 23 meshes with the sun gear 21 , and the other meshes with the ring gear 25 . In this embodiment, the first planetary gear 22 meshes with the sun gear 21 , and the second planetary gear 23 meshes with the ring gear 25 .

Each planetary reducer 20 includes a plurality of first planetary gears 22 and a plurality of second planetary gears 23 . The number of the first planetary gears 22 and the second planetary gears 23 is equal. Optionally, the first planetary gear 22 and the second planetary gear 23 are dual gears. Both the first planetary gear 22 and the second planetary gear 23 rotate around the planetary gear shaft 26 . The planet shaft 26 is parallel to the drive shaft 211 . In the axial direction of the planetary gear shaft 26 , the first planetary gear 22 is relatively close to the motor 10 , and the second planetary gear 23 is relatively far away from the motor 10 .

In this application, the first planetary gear 22 and the second planetary gear 23 are set as a double gear connected integrally, so that the overall structure of the electric drive assembly is more compact, the speed ratio range is wider, and the work of the electric drive assembly is greatly optimized. range interval.

The planetary carrier 24 is in transmission connection with the planetary wheel shaft 26 , and the planetary carrier 24 is arranged on the side of the second planetary wheel 23 away from the motor 10 . That is to say, both the first planetary gear 22 and the second planetary gear 23 are located on the same side of the planetary carrier 24 , that is, the side of the planetary carrier 24 close to the motor 10 . This setting method is more convenient to arrange during the design and actual production process of the motor 10, and is convenient for industrialization.

The ring gear 25 is fixed. In a direction perpendicular to the axis of the planetary gear shaft 26 , the ring gear 25 is disposed on a side of the second planetary gear 23 away from the axis of the output half shaft 30 . Moreover, the ring gear 25 is internally meshed with the second planetary gear 23 , which further widens the reduction ratio range of the planetary reducer 20 .

The output half shaft 30 is arranged coaxially with the transmission shaft 211 . One end of the output half shaft 30 is in drive connection with the planet carrier 24 , and the other end is in drive connection with the wheel 31 .

In this embodiment, when the rotor 12 of the motor 10 rotates, it drives the transmission shaft 211 to rotate, and the transmission shaft 211 transmits the torque to the sun gear 21, and the sun gear 21 drives the first planetary gear 22 and the second planetary gear 23 to rotate, and the second planetary gear The wheel 23 drives the planetary carrier 24 to rotate, and the planetary carrier 24 transmits the torque to the output half shaft 30 , and finally drives the wheel 31 to rotate.

Fig. 2 shows the right sun gear S1, left sun gear S2, right planetary carrier PC1, left planetary carrier PC2, right ring gear R1 and left The relationship between the speed of the ring gear R2. Since the right ring gear R1 and the left ring gear R2 are fixedly set, the rotational speed is 0. In this working condition, the rotation speed of the right sun gear S1 and the left sun gear S2 are the same, and the rotation speeds of the right planetary carrier PC1 and the left planetary carrier PC2 are also the same, so as to ensure the same rotation speed of the wheels on both sides and achieve the same rotation speed and torque output.

When the vehicle is in the left turning mode, the rotation speed of the right wheel needs to be higher than that of the left wheel. In this working condition, the rotational speed of the right sun gear S1 is greater than that of the left sun gear S2, and the rotational speed of the right planet carrier PC1 is greater than that of the left planet carrier PC2. When the vehicle is in the right turning mode, the speed of the right wheel needs to be lower than that of the left wheel. In this working condition, the rotation speed of the right sun gear S1 is smaller than the rotation speed of the left sun gear S2, and the rotation speed of the right planet carrier PC1 is lower than the rotation speed of the left planet carrier PC2.

Since the motors 10 on both sides can be individually controlled, the power output of one side or both sides can be changed correspondingly according to the power demand of the vehicle in different working states. Through the separate control of the motors on both sides, functions such as differential gear, differential lock, and vector control can be realized to make the speed control more precise.

The present application also provides a vehicle, including the above-mentioned dual-motor electric drive assembly.

The dual-motor electric drive assembly of the present application includes two motors 10, two planetary reducers 20, and two output half shafts 30, which can be arranged in a distributed manner, increasing the flexibility of the layout of the dual-motor electric drive assembly without additional mechanical The structure can realize functions such as differential, differential lock, and vector control, which saves the volume and weight of the dual-motor electric drive assembly, and improves the power density of the dual-motor electric drive assembly; the planetary reducer 20 adopts NW planetary row The structure can achieve a large speed ratio and optimize the working range of the motor; at the same time, two motors 10 are distributed on a single drive axle, and a single motor 10 drives a single wheel 31, which reduces the performance requirements of a single motor 10. Through the double motor work to increase the power output of individual transaxles.

The above description is only the preferred implementation mode of the application, and does not limit the application in any form. Although the application has disclosed the above with the preferred implementation mode, it is not used to limit the application. Anyone who is familiar with this professional technology Personnel, without departing from the scope of the technical solution of the present application, when using the technical content disclosed above to make some changes or modifications to equivalent implementations with equivalent changes, but any content that does not depart from the technical solution of the present application, according to the technical content of the present application Any simple modifications, equivalent changes and modifications made by the technical essence of the application to the above implementation methods still fall within the scope of the technical solution of the application.

Claims (10)

1. The double-motor electric drive assembly is characterized by comprising two motors, two planetary reducers and two output half shafts, wherein the two motors, the two planetary reducers and the two output half shafts are in one-to-one corresponding transmission connection; each planetary reducer comprises a sun gear, a first planetary gear, a second planetary gear, a planetary carrier and a gear ring, wherein the sun gear is in transmission connection with the motor; one of the first planet wheel and the second planet wheel is meshed with the sun wheel, and the other is meshed with the gear ring; the planet carrier is arranged on one side, far away from the motor, of the second planet wheel, and the planet carrier is in transmission connection with the output half shaft.

2. The dual motor drive assembly of claim 1, wherein the first planet wheel meshes with the sun gear and the second planet wheel meshes with the ring gear.

3. The dual motor electric drive assembly of claim 2, wherein the ring gear is located on a side of the second planet gear remote from the output half shaft and is in internal engagement with the second planet gear.

4. The dual electro-mechanical drive assembly of claim 1, wherein the planetary reducer further comprises a planetary axle about which the first and second planetary gears both rotate, the planetary axle being drivingly connected to the planet carrier.

5. The dual motor drive assembly of claim 1, wherein the motor includes a stator and a rotor, the rotor being drivingly connected to the sun gear by a drive shaft.

6. The dual motor electric drive assembly of claim 1, wherein the planetary reducer includes a plurality of the first planetary gears and a plurality of the second planetary gears, the first planetary gears being equal in number to the second planetary gears.

7. The dual motor electric drive assembly of claim 5, wherein two of said motors are positioned between two of said planetary reducers and two of said output half shafts are positioned on either side of two of said planetary reducers.

8. The dual motor drive assembly as recited in claim 7, wherein, the two motors, the two planetary reducers and the two output half shafts are symmetrically arranged respectively.

9. The dual motor drive assembly of any one of claims 1-8, further comprising a wheel, the output side shaft drive being connected to the wheel.

10. A vehicle is characterized in that, a dual motor drive assembly comprising any of claims 1-9.

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