Traction and differential integrated electric drive axle

Abstract

The utility model discloses a traction differential integrated electric drive axle which comprises a motor shell used for supporting, a right end cover is arranged at one side end of the motor shell, a left end cover is arranged at the other side end of the motor shell, and a motor stator coil is fixedly arranged on the inner end face of the motor shell. Compared with an existing electric vehicle, the electric drive axle has the advantages of being more direct in driving, more compact in size, higher in efficiency and more stable in speed regulation, noise is low, resonance is small, the size is small, more energy is saved, safety performance is better, the defect that the vehicle is driven to run in a traditional mode is overcome, and meanwhile the electric drive axle is more environmentally friendly and saves more energy.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle equipment, in particular to a traction differential integrated electric drive axle. Background Art

[0002] In today's electric vehicle market, with the exception of in-wheel motors, the primary transmission method is for the motor to output power to the drive shaft, which then transmits it to the reduction gearbox, which drives the differential. The differential then drives the axle gears, which are then transmitted to the wheels through the axles to propel the vehicle. This results in high energy consumption and a tendency for resonance in electric vehicles. The most advanced technology currently uses in-wheel motors or wheel-mounted motors, which utilize chip differentials for cornering. However, when the road surface is uneven, the differential is ineffective, easily causing the vehicle to roll over and resulting in a low safety factor. Therefore, electric drive axles with integrated traction differentials are urgently needed to address these issues. Utility Model Content

[0003] The purpose of the present utility model is to provide an electric drive axle with integrated traction differential to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a traction differential integrated electric drive axle, comprising a motor housing for support, a right end cover being provided at one side end of the motor housing, and a left end cover being provided at the other side end of the motor housing, a motor stator coil being fixedly provided at the inner end surface of the motor housing, and a motor rotor being provided at the inner end surface of the motor stator coil, a first motor bearing being provided at one end of the inner end surface of the motor housing, and a second motor bearing being provided at the other end of the inner end surface of the motor housing, a first oil seal for sealing being provided at the side end surface of the first motor bearing, and a second oil seal for sealing being provided at the side end surface of the second motor bearing,

[0005] A right motor rotor shaft, the right motor rotor shaft being rotatably engaged with an inner end surface of the motor housing through the first motor bearing;

[0006] The left motor rotor shaft is rotatably engaged with the inner end surface of the motor housing through the second motor bearing. A differential assembly is provided at the inner center of the right motor rotor shaft and the left motor rotor shaft. A left half shaft is provided at one end of the differential assembly, and a right half shaft is provided at the other end of the differential assembly.

[0007] Preferably, a right shaft tube is provided at the center of the side end surface of the right end cover, a left shaft tube is provided at the center of the side end surface of the left end cover, and cooling oil holes are provided on the inner end surfaces of the left shaft tube and the right shaft tube.

[0008] Preferably, the right side of the motor rotor shaft is in a straight line and passes through the right half shaft, and the left side of the motor rotor shaft is in a straight line and passes through the left half shaft, which can effectively improve the accuracy and stability of subsequent power transmission.

[0009] Preferably, the right motor rotor shaft and the left motor rotor shaft are used to output power, which can improve the stability of direct power transmission.

[0010] Preferably, the motor rotor drives the right half shaft through the right motor rotor shaft and the differential assembly for transmission, and the motor rotor drives the left half shaft through the left motor rotor shaft and the differential assembly for transmission. The above transmission method can drive the wheels to drive the vehicle for stable driving. At the same time, the entire transmission process is simple, clear, smooth, and efficient, which reduces energy consumption and improves transmission efficiency.

[0011] Preferably, the cooling oil hole is through-connected with the interior of the motor housing, and the cooling oil hole is used to dissipate heat from the structure inside the motor housing. The cooling oil holes on the left and right sides of the drive axle perform heat exchange and dissipation through cooling oil, which can quickly absorb and dissipate the heat inside the axle, while ensuring the lubrication of the differential assembly and the timely dissipation of heat inside the motor, ensuring that the traction motor drives the vehicle for a long time, with high efficiency, smoothly and stably.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. Compared with previous electric vehicles, this utility model has the advantages of more direct drive, more compact size, higher efficiency, smoother speed regulation, low noise, small resonance, small size, more energy saving and better safety performance, which solves the shortcomings of traditional vehicle driving methods. At the same time, this electric drive axle is also more environmentally friendly and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the main body of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the main power transmission of the utility model.

[0016] In the figure: 1-left half-shaft, 2-left shaft tube, 3-cooling oil hole, 4-left end cover, 5-motor housing, 6-motor stator coil, 7-motor rotor, 8-right end cover, 9-first motor bearing, 10-right shaft tube, 11-right half-shaft, 12-motor rotor shaft right, 13-first oil seal, 14-motor rotor shaft left, 15-differential assembly, 16-second motor bearing, 17-second oil seal. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-2 The utility model provides an embodiment of an integrated electric drive axle with traction differential, comprising a motor housing 5 for support, a right end cover 8 provided at one side end of the motor housing 5, and a left end cover 4 provided at the other side end of the motor housing 5, a motor stator coil 6 fixedly provided on the inner end surface of the motor housing 5, and a motor rotor 7 provided on the inner end surface of the motor stator coil 6, a first motor bearing 9 provided at one end of the inner end surface of the motor housing 5, and a second motor bearing 16 provided at the other end of the inner end surface of the motor housing 5, a first oil seal 13 for sealing provided on the side end surface of the first motor bearing 9, and a second oil seal 17 for sealing provided on the side end surface of the second motor bearing 16,

[0019] The right motor rotor shaft 12 is rotatably engaged with the inner end surface of the motor housing 5 through the first motor bearing 9;

[0020] The left motor rotor shaft 14 is rotatably connected to the inner end surface of the motor housing 5 through the second motor bearing 16. A differential assembly 15 is provided at the inner center of the right motor rotor shaft 12 and the left motor rotor shaft 14. A left half-shaft 1 is provided at one end of the differential assembly 15, and a right half-shaft 11 is provided at the other end of the differential assembly 15.

[0021] A right shaft tube 10 is provided at the center of the side end surface of the right end cover 8, a left shaft tube 2 is provided at the center of the side end surface of the left end cover 4, and cooling oil holes 3 are provided on the inner end surfaces of the left shaft tube 2 and the right shaft tube 10.

[0022] The right motor rotor shaft 12 is in a straight line and passes through the right half shaft 11, and the left motor rotor shaft 14 is in a straight line and passes through the left half shaft 1, which can effectively improve the accuracy and stability of subsequent power transmission.

[0023] The right motor rotor shaft 12 and the left motor rotor shaft 14 are used for outputting power, which can improve the stability of direct power transmission.

[0024] The motor rotor 7 drives the right half-shaft 11 through the right motor rotor shaft 12 and the differential assembly 15 for transmission, and the motor rotor 7 drives the left half-shaft 1 through the left motor rotor shaft 14 and the differential assembly 15 for transmission. The above transmission method can drive the wheels to drive the vehicle for stable driving. At the same time, the entire transmission process is simple, clear, smooth, and efficient, which reduces energy consumption and improves transmission efficiency.

[0025] The cooling oil hole 3 is connected to the interior of the motor housing 5, and the cooling oil hole 3 is used to dissipate heat from the structure inside the motor housing 5. The cooling oil holes 3 on the left and right sides of the drive axle perform heat exchange and heat dissipation through cooling oil, which can quickly absorb and dissipate the heat inside the axle, while ensuring the lubrication of the differential assembly 15 and the timely dissipation of heat inside the motor, ensuring that the traction motor drives the vehicle for a long time, with high efficiency, smoothly and stably.

[0026] Working principle: During transmission, the motor stator coil 6 first provides electrical energy to the motor rotor 7, so that the motor rotor 7 can synchronously drive the motor rotor shaft 12 and the motor rotor shaft 14 to rotate. Then the motor rotor shaft 12 and the motor rotor shaft 14 directly transmit the power of the motor to the left half shaft 1 and the right half shaft 11 through the differential assembly 15, thereby driving the wheels to drive the vehicle. When dissipating heat, external cooling lubricating oil can be introduced through the cooling oil hole 3. The cooling oil introduced through the cooling oil hole 3 can not only dissipate the heat inside the axle, but also ensure the lubrication of the differential assembly 15 and ensure that the heat inside the motor is dissipated in time.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traction differential integrated electric drive axle, comprising a motor housing (5) for supporting, a right end cover (8) being provided at one side end of the motor housing (5), and a left end cover (4) being provided at the other side end of the motor housing (5), a motor stator coil (6) being fixedly provided at the inner end surface of the motor housing (5), and a motor rotor (7) being provided at the inner end surface of the motor stator coil (6), a first motor bearing (9) being provided at one end of the inner end surface of the motor housing (5), and a second motor bearing (16) being provided at the other end of the inner end surface of the motor housing (5), a first oil seal (13) for sealing being provided at the side end surface of the first motor bearing (9), and a second oil seal (17) for sealing being provided at the side end surface of the second motor bearing (16), characterized in that: A right motor rotor shaft (12), the right motor rotor shaft (12) being rotatably engaged with the inner end surface of the motor housing (5) through the first motor bearing (9); The left motor rotor shaft (14) is rotatably engaged with the inner end surface of the motor housing (5) through the second motor bearing (16). A differential assembly (15) is provided at the inner center of the right motor rotor shaft (12) and the left motor rotor shaft (14). A left half shaft (1) is provided at one end of the differential assembly (15), and a right half shaft (11) is provided at the other end of the differential assembly (15).

2. The traction differential integrated electric drive axle according to claim 1, characterized in that: A right shaft tube (10) is provided at the center of the side end surface of the right end cover (8), a left shaft tube (2) is provided at the center of the side end surface of the left end cover (4), and cooling oil holes (3) are provided on the inner end surfaces of the left shaft tube (2) and the right shaft tube (10).

3. The traction differential integrated electric drive axle according to claim 2, characterized in that: The right motor rotor shaft (12) is in a straight line and passes through the right half shaft (11), and the left motor rotor shaft (14) is in a straight line and passes through the left half shaft (1).

4. The traction differential integrated electric drive axle according to claim 2, characterized in that: The right motor rotor shaft (12) and the left motor rotor shaft (14) are used for outputting power.

5. The traction differential integrated electric drive axle according to claim 2, characterized in that: The motor rotor (7) drives the right half shaft (11) through the right motor rotor shaft (12) and the differential assembly (15) to transmit the power, and the motor rotor (7) drives the left half shaft (1) through the left motor rotor shaft (14) and the differential assembly (15) to transmit the power.

6. The traction differential integrated electric drive axle according to claim 2, characterized in that: The cooling oil hole (3) is connected to the interior of the motor housing (5), and the cooling oil hole (3) is used to dissipate heat from the structure inside the motor housing (5).

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