Dual-motor driving mechanism of pure electric vehicle

Abstract

The utility model discloses a blade electric vehicle double-motor driving mechanism which comprises a first motor, a second motor, a first duplex planet row connected with the first motor and a second duplex planet row connected with the second motor, the first duplex planet row is connected with a first output half shaft, and the second duplex planet row is connected with a second output half shaft. According to the double-motor driving mechanism of the pure electric vehicle, the double motors, the duplex planet row and the gear mechanism are adopted to form a coaxial output double-motor structure power driving system, the structure is simple, the size is compact, the weight is light, the cost is low, and the transmission efficiency and performance can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile transmission technology, specifically, the utility model relates to a kind of double-motor drive mechanism of pure electric vehicle. BACKGROUND

[0002] Automobile hybrid power mechanism is applied more in new energy vehicle;Current automobile hybrid power mechanism is difficult to consider the fuel consumption and implementation cost when automobile is driven at high speed.

[0003] Such as the patent literature with the publication number CN108237893A discloses a kind of hybrid vehicle, during high-speed driving, engine and motor are coupled by planetary mechanism, two power flows are converged after output power, wherein electric power flow is motor generation, electricity storage, electricity, electric drive.Its insufficient is as follows: during high-speed driving, engine and motor are coupled by planetary mechanism, two power flows are converged after output power, wherein electric power flow is motor generation, electricity storage, electricity, electric drive, efficiency is very low, cause oil consumption is high when driving at high speed. UTILITY MODEL CONTENT

[0004] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a kind of double-motor drive mechanism of pure electric vehicle, the purpose is to reduce cost, improve transmission efficiency and performance.

[0005] In order to achieve the above-mentioned purpose, the technical scheme that the utility model takes is as follows: a kind of double-motor drive mechanism of pure electric vehicle, including first motor, second motor, first double planetary gear train connected with the first motor and second double planetary gear train connected with the second motor, first double planetary gear train is connected with first output half shaft, and second double planetary gear train is connected with second output half shaft.

[0006] The first double planetary gear train includes first sun gear, first planet carrier, first ring gear and first large planet gear and first small planet gear arranged on the first planet carrier, the first planet carrier is connected with the first output half shaft, the first sun gear is connected with the first motor, and the first large planet gear is engaged with the first sun gear.

[0007] The first ring gear is fixedly arranged, and the first ring gear is engaged with the first small planet gear.

[0008] The second double planetary gear train includes second sun gear, second planet carrier, second ring gear and second large planet gear and second small planet gear arranged on the second planet carrier, the second planet carrier is connected with the second output half shaft, the second sun gear is connected with the second motor, and the second large planet gear is engaged with the second sun gear.

[0009] The second ring gear is fixedly arranged, and the second ring gear is engaged with the second small planetary gear.

[0010] The first motor and the second motor are coaxially arranged.

[0011] The pure electric vehicle double-motor driving mechanism has the advantages of simple structure, compact size, light weight, low cost, improved transmission efficiency and performance, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present specification includes the following drawings, and the shown contents are respectively:

[0013] Figure 1 is a structural schematic view of the pure electric vehicle double-motor driving mechanism of the utility model;

[0014] In the figure, the marks are: 1, first sun gear; 2, first planetary carrier; 3, first ring gear; 4, first large planetary gear; 5, first small planetary gear; 6, first motor; 7, second sun gear; 8, second planetary carrier; 9, second ring gear; 10, second large planetary gear; 11, second small planetary gear; 12, second motor; 13, first output half shaft; 14, second output half shaft. DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model are further described in detail below by comparing with the drawings and through the description of the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and deep understanding on the conception and technical scheme of the utility model, and to help its implementation.

[0016] It should be noted that in the following embodiments, the "first" and "second" do not represent the absolute division relationship of structure and / or function, nor represent the execution order, but only for the convenience of description.

[0017] As Figure 1 shown, the utility model provides a kind of pure electric vehicle double-motor driving mechanism, including first motor 6, second motor 12, first double planetary row connected with first motor 6 and second double planetary row connected with second motor 12, first double planetary row is connected with first output half shaft 13, and second double planetary row is connected with second output half shaft 14.

[0018] Specifically, as Figure 1As shown, the first double planetary gear set includes a first sun gear 1, a first carrier 2, a first ring gear 3, and rotatably arranged first large planetary gears 4 and first small planetary gears 5 on the first carrier 2, the first carrier 2 is connected with a first output half shaft 13, the first sun gear 1 is connected with a first motor 6, the first large planetary gears 4 are engaged with the first sun gear 1. The first ring gear 3 is fixedly arranged, and the first ring gear 3 is engaged with the first small planetary gears 5. The first large planetary gears 4 and the first small planetary gears 5 are arranged in multiple, each first large planetary gear 4 is coaxially arranged with one first small planetary gear 5, all the first large planetary gears 4 are distributed around the first sun gear 1, the diameter of the first large planetary gear 4 is greater than the diameter of the first small planetary gear 5, and the first sun gear 1 is fixedly connected with the output end of the first motor 6. The first output half shaft 13 is connected with the first carrier 2 through a spline to output power, the first output half shaft 13 is coaxially arranged with the first sun gear 1, the first output half shaft 13 is used to be connected with an automobile wheel, and the first ring gear 3 is fixedly installed on the housing.

[0019] As shown in the figure, Figure 1 The second double planetary gear set includes a second sun gear 7, a second carrier 8, a second ring gear 9, and rotatably arranged second large planetary gears 10 and second small planetary gears 11 on the second carrier 8, the second carrier 8 is connected with a second output half shaft 14, the second sun gear 7 is connected with a second motor 12, the second large planetary gears 10 are engaged with the second sun gear 7. The second ring gear 9 is fixedly arranged, and the second ring gear 9 is engaged with the second small planetary gears 11. The second large planetary gears 10 and the second small planetary gears 11 are arranged in multiple, each second large planetary gear 10 is coaxially arranged with one second small planetary gear 11, all the second large planetary gears 10 are distributed around the second sun gear 7, the diameter of the second large planetary gear 10 is greater than the diameter of the second small planetary gear 11, and the second sun gear 7 is fixedly connected with the output end of the second motor 12. The second output half shaft 14 is connected with the second carrier 8 through a spline to output power, the second output half shaft 14 is coaxially arranged with the second sun gear 7, the second output half shaft 14 is used to be connected with an automobile wheel, and the second ring gear 9 is fixedly installed on the housing.

[0020] As shown in the figure, Figure 1 The first motor 6 and the second motor 12 are coaxially arranged. The two motors are respectively connected with the two double planetary gear sets to realize distributed driving of power and coaxial power output in structure. The first motor 6 and the second motor 12 are decoupled with each other to realize decoupling of power transmission and vector driving mode of the wheel rim. The two motors can independently drive the wheel to realize wheel rim torque vector control.

[0021] The double-motor driving mechanism of the pure electric vehicle has no differential structure, realizes the function of the wheel-side differential lock, and improves the passing performance of the vehicle.

[0022] The utility model is described above with reference to the drawings. Obviously, the utility model is not limited by the above method. As long as the method concept and technical scheme of the utility model are used for various non-essential improvements, or the above concept and technical scheme of the utility model are directly applied to other occasions without improvement, they are within the protection scope of the utility model.

Claims

1. A dual-motor drive mechanism for a pure electric vehicle, comprising a first motor and a second motor, characterized in that: The invention also includes a first double-coupled planetary gear connected to the first motor and a second double-coupled planetary gear connected to the second motor, the first double-coupled planetary gear connected to the first output half shaft, and the second double-coupled planetary gear connected to the second output half shaft; The first double planetary gear comprises a first sun gear, a first planet carrier, a first ring gear, and a first large planet gear and a first small planet gear provided on the first planet carrier, the first planet carrier is connected to the first output half shaft, the first sun gear is connected to the first motor, and the first large planet gear is meshed with the first sun gear; The first ring gear is fixed and meshes with the first asteroid gear; The second double planetary gear comprises a second sun gear, a second planet carrier, a second ring gear, and a second large planetary gear and a second small planetary gear provided on the second planet carrier, the second planet carrier is connected to the second output half shaft, the second sun gear is connected to the second motor, and the second large planetary gear is meshed with the second sun gear; The second ring gear is fixed and meshes with the second planetary gear.

2. The dual-motor drive mechanism for a pure electric vehicle according to claim 1, characterized in that: The first motor and the second motor are coaxially arranged.

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