Electric driving system and vehicle

Abstract

The invention belongs to the technical field of vehicles, and provides an electric driving system and a vehicle. Comprising an electric drive assembly, a single motor and a motor controller. The motor controller is flush with the single motor and is arranged in the same shell; the electric drive assembly adopts three-stage speed reduction, wherein the first-stage speed reduction adopts a planetary mechanism to be connected with a first-stage speed reduction driven wheel in series. The arrangement gravity center of the seat of the whole vehicle can be lower, the space in the vehicle is increased, and the comfort level of passengers is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular relates to an electric drive system and a vehicle. Background Art

[0002] A two-speed electric drive assembly technology with high torque and high power not only provides power for off-road vehicles, but also controls the shift motor to shift gears on muddy roads or desert roads, thereby increasing the speed ratio and wheel-end torque, and also increasing ground adhesion on roads with less adhesion. When passing through a shell crater, the torque of the left and right wheels is redistributed to 0 or 100% through an electronically controlled mechanical differential lock, allowing the side with a greater adhesion rate to pass easily.

[0003] There are two types of high-torque and high-power two-speed electric drive assembly structures in the industry:

[0004] (1) The structure of the two-speed electric drive assembly with high torque and high power is similar to the coaxial arrangement. Although the Z-axis dimension is small and the power density is large, it is not suitable for non-load-bearing body hard-core off-road vehicles. The power-type two-speed electric drive assembly, without a locking mechanism, is commonly found in the coaxial electric drive architecture.

[0005] (2) The high-torque and high-power two-speed electric drive assembly structure is similar to a parallel shaft arrangement, which is a four-shaft transmission and three-stage reduction structure. The overall size is huge and there is no weight advantage, that is, the power density of the electric drive system is low. In the overall vehicle layout, the axial dimension and the Z dimension are large, resulting in the vehicle seat being too high and the ride comfort being insufficient.

[0006] Therefore, the technology currently available on the market cannot simultaneously meet the requirements of riding comfort and an electric drive system with a large speed ratio and high torque. Summary of the invention

[0007] To solve the above problems, the present invention provides an electric drive system and a vehicle. Based on the understanding of the existing off-road comfort models in the industry, the present invention proposes a solution of a two-speed electric drive assembly technology with high torque and high power, which not only brings comfort to the whole vehicle, but also enables easy off-road in different scenarios.

[0008] The present invention aims at the deficiencies in the prior art and provides an electric drive system and a vehicle.

[0009] The present invention is achieved through the following technical solutions:

[0010] It includes an electric drive assembly, a single motor and a motor controller; the motor controller and the single motor are arranged inside the same housing; the electric drive assembly adopts a three-stage reduction, in which the first-stage reduction adopts a planetary mechanism connected in series with the first-stage reduction driven wheel.

[0011] Further, the planetary mechanism comprises a sun gear coaxial with the single motor shaft, an external gear sleeve coaxially arranged with the single motor shaft, and a planetary gear meshing with both the sun gear and the external gear sleeve;

[0012] The outer gear sleeve is meshed with the primary reduction driven wheel, the primary reduction driven wheel is arranged on the input shaft, and the input shaft is coaxially arranged with the single motor shaft.

[0013] Furthermore, the sun gear, the planetary gears, the outer gear sleeve and the primary reduction driven wheel constitute the primary reduction.

[0014] Further, the secondary reduction includes a secondary reduction first gear driving wheel on the input shaft, a secondary reduction second gear driving wheel on the input shaft, a secondary reduction first gear driven wheel meshed with the secondary reduction first gear driving wheel, and a secondary reduction second gear driven wheel meshed with the secondary reduction second gear driving wheel.

[0015] Furthermore, the two-stage reduction first-gear driven wheel, the two-stage reduction second-gear driven wheel, and the intermediate shaft are coaxially arranged.

[0016] Further, the electric drive assembly includes a shift mechanism;

[0017] The shift mechanism is arranged on the intermediate shaft and is located between the secondary reduction first gear driven wheel and the secondary reduction second gear driven wheel.

[0018] Furthermore, the three-stage reduction includes a three-stage reduction driving wheel coaxial with the intermediate shaft and a large plate gear meshing with the three-stage reduction driving wheel.

[0019] Furthermore, the three-stage reduction driven wheel is on the output shaft;

[0020] The single motor shaft, the intermediate shaft and the output shaft are arranged in parallel and have the same height from the ground.

[0021] Furthermore, the electric drive assembly includes an electronically controlled mechanical differential lock coaxially arranged with the output shaft.

[0022] In a second aspect, the present invention further provides a vehicle comprising the above-mentioned electric drive system.

[0023] The technical solution of the present invention has the following advantages: the present invention is a three-axis three-stage reduction structure, the planetary gear and the gear input shaft are coaxially arranged, and the Z-direction and X-direction dimensions are smaller than the two-speed reduction box of the same level. This technology can make the layout of the vehicle seat lower, increase the space inside the vehicle, and improve the comfort of the passengers. The shift mechanism is integrated, and the shift fork is used to achieve 1-N-2 gear switching back and forth, responding to the vehicle command, using the first gear with a large speed ratio and large torque in the off-road mode to increase the adhesion of the wheel end, and improve the off-road driving performance in the desert.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of an electric drive system provided in a first embodiment of the present invention;

[0027] Description of reference numerals:

[0028] 01-motor controller, 02-single motor, 03-electronically controlled mechanical differential lock, 04-electric drive assembly, 05-left wheel, 06-right wheel, 07-left half shaft of output shaft, 08-right half shaft of output shaft, 09-single motor shaft, 10-input shaft, 11-intermediate shaft, 12-sun gear, 13-planetary gear, 14-external gear sleeve, 15-first-stage reduction driven wheel, 16-second-stage reduction second gear driving wheel, 17-second-stage reduction first gear driving wheel, 18-second-stage reduction first gear driven wheel, 19-second-stage reduction second gear driven wheel, 20-third-stage reduction driving wheel, 21-shift mechanism, 22-large plate gear. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The same reference numerals in the drawings represent the same or similar elements, components or parts, and thus the repeated description of the same or similar elements, components or parts may be omitted below. It should also be understood that although the first, second, third and other attributives representing the numbers may be used herein to describe various devices, elements, components or parts, these devices, elements, components or parts should not be limited by these attributives. In other words, these attributives are only used to distinguish one from another. For example, the first device may also be called the second device, but it does not deviate from the essential technical solution of the present invention. In addition, the terms "and / or" and "and / or" refer to all combinations including any one or more of the listed items.

[0031] like Figure 1 As shown, the electric drive system includes a motor controller 01, a single motor 02 and an electric drive assembly 04. The motor controller 01 and the single motor 02 are assembled together in a first housing.

[0032] The electric drive assembly 04 includes an electronically controlled mechanical differential lock 04. The electronically controlled mechanical differential lock 03 is built into the housing of the electric drive assembly 04, replacing the traditional open differential, and is respectively connected to the left half shaft 07 and the right half shaft 08 of the output shaft of the vehicle to provide forward or backward power for the left wheel 05 and the right wheel 06.

[0033] The electronically controlled mechanical differential lock 03 receives the vehicle signal to execute the differential lock, locking the left wheel 05 and the right wheel 06, and the power is transmitted from the high-speed wheel to the other side wheel, increasing the wheel end torque and the ground adhesion.

[0034] The shift mechanism 21 receives the vehicle low-voltage signal through the shift controller, inputs it to the shift motor to execute the shift action, determines the position of the gear tooth through the shift position sensor signal, and executes the shift action through the synchronizer.

[0035] The first-stage reduction is achieved by the single motor shaft 09 transmitting power to the sun gear 12 of the planetary mechanism, and then transmitting it to the planetary gear 13. The outer gear sleeve 14 of the planetary mechanism meshes with the planetary gear 13 and transmits power to the first-stage reduction driven wheel 15, thereby completing the function of amplifying the speed ratio.

[0036] The secondary reduction includes a primary reduction driven wheel 15, a secondary reduction second gear driving wheel 16, and a secondary reduction first gear driving wheel 17 fixed on the same shaft, namely, the input shaft 10. The power is transmitted coaxially to the intermediate shaft 11, the secondary reduction second gear driving wheel 16 and the secondary reduction second gear driven wheel 19 are meshed, and the secondary reduction first gear driving wheel 17 and the secondary reduction first gear driven wheel 18 are meshed.

[0037] The shift mechanism 21 is arranged between the secondary reduction second gear driven wheel 19 and the secondary reduction first gear driven wheel 18 of the intermediate shaft 11, and the shift motor provides power to shift the synchronizer to perform the 1~N~2 shift action.

[0038] The three-stage reduction includes an intermediate shaft 11 that transmits power to a three-stage reduction driving wheel 20 through a two-stage reduction second-gear driven wheel 19 or a two-stage reduction first-gear driven wheel 18. The three-stage reduction driving wheel 20 engages with a large plate gear 22 to transmit power to the output shaft left half shaft 07 and the output shaft right half shaft 08.

[0039] The electronically controlled mechanical differential lock 03 realizes torque transmission and superposition by engaging and disconnecting the left and right output shaft teeth through the differential lock connector according to the demand signal of the vehicle control unit.

[0040] The large plate gear 22 is arranged on the left half shaft 07 and the right half shaft 08 of the output shaft, and the single motor shaft 02, the input shaft 10, the intermediate shaft 11, the left half shaft 07 and the right half shaft 08 of the output shaft are arranged in parallel and have the same height from the ground.

[0041] The present invention also provides a vehicle, comprising the above-mentioned electric drive system.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric drive system, characterized in that: It includes an electric drive assembly, a single motor and a motor controller; the motor controller and the single motor are arranged inside the same housing; the electric drive assembly adopts a three-stage reduction, in which the first-stage reduction adopts a planetary mechanism connected in series with the first-stage reduction driven wheel.

2. The electric drive system according to claim 1, characterized in that: The planetary mechanism comprises a sun gear coaxial with the single motor shaft, an external gear sleeve coaxially arranged with the single motor shaft, and a planetary gear meshing with both the sun gear and the external gear sleeve; The outer gear sleeve is meshed with the primary reduction driven wheel, the primary reduction driven wheel is arranged on the input shaft, and the input shaft is coaxially arranged with the single motor shaft.

3. The electric drive system according to claim 2, characterized in that: The sun gear, the planetary gears, the outer gear sleeve and the primary reduction driven wheel constitute the primary reduction.

4. The electric drive system according to claim 2, characterized in that: The secondary reduction includes a secondary reduction first-gear driving wheel on the input shaft, a secondary reduction second-gear driving wheel on the input shaft, a secondary reduction first-gear driven wheel meshed with the secondary reduction first-gear driving wheel, and a secondary reduction second-gear driven wheel meshed with the secondary reduction second-gear driving wheel.

5. The electric drive system according to claim 4, characterized in that: The two-stage reduction first-gear driven wheel, the two-stage reduction second-gear driven wheel and the intermediate shaft are coaxially arranged.

6. The electric drive system according to claim 4, characterized in that: The electric drive assembly includes a shift mechanism; The shift mechanism is arranged on the intermediate shaft and is located between the secondary reduction first gear driven wheel and the secondary reduction second gear driven wheel.

7. The electric drive system according to claim 5 or 6, characterized in that: The three-stage reduction includes a three-stage reduction driving wheel coaxial with the intermediate shaft and a large plate gear meshing with the three-stage reduction driving wheel.

8. The electric drive system according to claim 7, characterized in that: The three-stage reduction driven wheel is on the output shaft; The single motor shaft, the intermediate shaft and the output shaft are arranged in parallel and have the same height from the ground.

9. The electric drive system according to claim 8, characterized in that: The electric drive assembly includes an electronically controlled mechanical differential lock coaxially arranged with the output shaft.

10. A vehicle, characterized in that: Comprising the electric drive system as described in any one of claims 1-9.

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