CN109421502A - A kind of suspension type dual-motor electric axle assembly - Google Patents

Abstract

The name of the invention is a suspension type double motor electric axle assembly. It belongs to the field of automobile manufacturing technology. It mainly solves the problem that the existing pure electric vehicle adopts the power unit structure of the traditional internal combustion engine vehicle and has a long transmission chain and occupies part of the vehicle space. Its main features are: it includes a mechanical axle, a first drive motor, a second drive motor and a gear box; the first drive motor and the second drive motor are respectively connected with two torque input ends of the gear box, and the gear box torque The output and end are connected with a mechanical axle to form an electric axle assembly; the mechanical axle, the first drive motor, the second drive motor and the gear box are arranged in a parallel structure. The invention has the characteristics of stable power output, high efficiency, compact structure, reduced weight, increased passenger space and battery layout space, and improved product applicability and competitiveness, and is mainly used for electric axle power assemblies of pure electric vehicles.

Description

A suspension type double motor electric axle assembly

technical field

The invention belongs to the technical field of automobile manufacturing, and particularly relates to an electric axle power assembly for a pure electric vehicle.

Background technique

At present, the vast majority of pure electric vehicles use the power unit structure of traditional internal combustion engine vehicles, that is, motor, transmission shaft, reducer/differential assembly. Due to the long transmission chain, the loss of transmission efficiency is large, and the volume of each component is large, which will occupy part of the car space, affect the passenger capacity of the passenger compartment and the battery layout space, and affect the driving mileage of the vehicle.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the purpose of the invention of the present invention is to provide an electric axle assembly that integrates the drive motor, the gearbox and the traditional mechanical axle. This compact structure arrangement can shorten the transmission chain and improve the efficiency. Increase the passenger capacity of the car and increase the battery capacity of the car, thereby reducing the energy consumption per unit load.

In order to achieve the above object, the present invention adopts the following technical solutions: a suspension type dual-motor electric axle assembly, comprising a mechanical axle, and is characterized in that: it also includes a first drive motor, a second drive motor and a gear box; The first drive motor and the second drive motor are respectively connected with the two torque input ends of the gearbox, and the torque input end of the gearbox is connected with the mechanical axle to form an electric axle assembly; the mechanical axle, the first drive motor, The second drive motor and the gear box are arranged in a parallel structure.

The gearbox described in the technical solution of the present invention includes a reducer and a differential assembly integrated in the gearbox housing.

The reducer described in the technical solution of the present invention is a two-stage reduction reducer composed of a first cylindrical gear, a double cylindrical gear and a second cylindrical gear.

In the technical solution of the present invention, the gears of the reducer are mounted on the differential housing of the mechanical axle, and the gears of the reducer are coaxial with the two wheel ends of the mechanical axle.

The first drive motor and the second drive motor described in the technical solution of the present invention are symmetrically distributed on both sides of the gearbox, and are connected to the gearbox by flange interface bolts.

Based on the existing traditional axle power transmission structure, the invention integrates the first drive motor, the second drive motor, the gear box and the mechanical axle into an electric axle assembly, cancels the transmission shaft and the active and passive gears, and the first The torque output by the drive motor and the second drive motor is input to the wheel end after passing through the gear box. The invention has compact structure and arrangement, shortens the transmission chain, improves the transmission efficiency, increases the passenger capacity of the carriage, and increases the battery capacity of the carriage, thereby reducing the energy consumption per unit load mass, and has the advantages of stable power output, high efficiency, compact structure, and reduced weight, and increases the passenger capacity of the carriage. Characteristics of space and battery arrangement space.

Description of drawings

FIG. 1 is a schematic structural diagram of an electric vehicle axle assembly of the present invention.

FIG. 2 is a schematic structural diagram of the electric axle gear box assembly of the present invention.

In the figure: 1. First drive motor; 2. Gear box; 3. Second drive motor; 4. Mechanical axle; 6. First spur gear; 6. Double spur gear; 7. Second spur gear; 8 . Differential assembly; 9. Gear box housing.

Detailed ways

As shown in Figure 1 and Figure 2. A suspension type dual-motor electric axle assembly of the present invention includes a mechanical axle 4 , a first driving motor 1 , a second driving motor 3 and a gear box 2 . Among them, the mechanical axle 4 adopts the traditional mechanical axle in the traditional pure electric vehicle drive unit. The first drive motor 1 and the second drive motor 3 use motors in traditional pure electric vehicle drive units. The gearbox 2 includes a reducer and differential assembly 8 integrated in the gearbox housing 9 . The reducer is a two-stage reduction reducer composed of a first cylindrical gear 5, a double cylindrical gear 6 and a second cylindrical gear 7. The torque of the first drive motor 1 and the second drive motor 3 passes through the two-stage speed of the gear box 2. The ratio is amplified and input to the wheel ends on both sides of the mechanical axle 4. The first drive motor 1 and the second drive motor 3 are symmetrically distributed on opposite sides of the gear box 2 , and are connected to the two torque input ends of the gear box 2 by flange interface bolts. The torque output end of the gearbox 2 is connected with the mechanical axle 4, the second spur gear 7 of the reducer in the gearbox 2 is installed on the differential housing of the mechanical axle 4, and the second spur gear 7 is connected to the two wheels of the mechanical axle 4. end coaxial. The present invention adopts a split structure design, and the mechanical axle 4, the first drive motor 1, the second drive motor 3 and the gear box 2 are arranged in a parallel structure to form an electric axle assembly.

The present invention integrates the functions of a motor, a reducer, a transmission shaft and a traditional mechanical axle in a traditional pure electric vehicle drive unit, and replaces them in structure and function. The first drive motor 1, the second drive motor 3, the gearbox 2 and the traditional mechanical axle 4 are integrated into an electric axle assembly, the transmission shaft and the active and passive gears are cancelled, and the torque output by the motor is input through the gearbox 2 To the wheel end, the wheel end half shafts of the first drive motor 1, the second drive motor 3, the gearbox 2 and the mechanical axle 4 are parallel.

Claims (5)

1. a kind of suspension type dual-motor electric axle assembly, including mechanical vehicle bridge (4), it is characterised in that: further include the first driving Motor (1), the second driving motor (3) and gear-box (2)；First driving motor (1), the second driving motor (3) respectively with Two torque input ends of gear-box (2) couple, and gear-box (2) torque is defeated to be coupled with end with mechanical vehicle bridge (4), constitute electric vehicle Axle assembly；Mechanical vehicle bridge (4), the first driving motor (1), the second driving motor (3) and gear-box (2) use parallel construction cloth It sets.

2. a kind of suspension type dual-motor electric axle assembly according to claim 1, it is characterised in that: the gear-box It (2) include the retarder and differential assembly (8) being integrated in gear box casing (9).

3. a kind of suspension type dual-motor electric axle assembly according to claim 2, it is characterised in that: the retarder For the double reduction retarder being made of the first roller gear (5), double cylindrical gear (6) and the second roller gear (7).

4. a kind of suspension type dual-motor electric axle assembly according to claim 1 or 2, it is characterised in that: described subtracts The gear of fast device is mounted on the poor shell of mechanical vehicle bridge (4), and the gear of retarder and the two-wheeled end of mechanical vehicle bridge (4) are coaxial.

5. a kind of suspension type dual-motor electric axle assembly according to claim 1 or 2, it is characterised in that: described One driving motor (1), the second driving motor (3) are symmetrically distributed in the two sides of gear-box (2), using flange-interface bolt and gear Case (2) connection.