CN221049395U - Electric drive bridge power transmission system - Google Patents
Electric drive bridge power transmission system Download PDFInfo
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- CN221049395U CN221049395U CN202323160501.XU CN202323160501U CN221049395U CN 221049395 U CN221049395 U CN 221049395U CN 202323160501 U CN202323160501 U CN 202323160501U CN 221049395 U CN221049395 U CN 221049395U
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- sun gear
- planet carrier
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- electric drive
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000012546 transfer Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Abstract
The utility model discloses an electric drive bridge power transmission system, and belongs to the technical field of automobile transmission. The planetary gear transmission mechanism comprises a motor, a left secondary planetary gear row, a first-stage planetary gear row, a differential mechanism and a right secondary planetary gear row; the primary planet row comprises a primary sun gear fixed on a primary planet carrier; the differential comprises a differential first sun gear and a differential second sun gear which are fixed on a differential planet carrier; the left secondary planet row comprises a left secondary sun gear fixed on a left secondary planet carrier; the right secondary planet row comprises a right secondary sun gear fixed on a right secondary planet carrier; the gear ring of the primary sun gear is fixedly connected to the electric drive axle housing; the primary planet carrier is fixedly connected with the differential mechanism planet carrier; the utility model designs the motor, the transmission shaft and the driving axle into a highly integrated power transmission route, is more convenient for the arrangement of the chassis, not only effectively releases the space of the chassis and lightens the weight of the chassis, but also further increases the load and reduces the energy consumption.
Description
Technical Field
The utility model belongs to the technical field of automobile transmission, and relates to an electric drive bridge power transmission system.
Background
In the background of increasingly urgent energy conservation and emission reduction in the current automobile industry, the lightweight design of automobiles is particularly important. In the light weight design research of automobiles, the light weight design of a critical drive axle in a chassis system has been an important and hot spot in the industry. The light weight of the automobile drive axle aims to manufacture the drive axle with the strongest bearing capacity and high transmission efficiency by adopting the most compact structure and the lightest weight design. The electric drive axle has the advantages of compact structure, small volume, high transmission efficiency, low cost and the like, and is an electromechanical integrated drive system designed aiming at the structural layout and transmission characteristics of the pure electric automobile. However, the existing electric drive bridge also has the defects of occupied chassis space, large weight, low transmission efficiency and high energy consumption, and the NVH problem is difficult to solve and has large noise; the system is inefficient. For example, chinese patent application number 201820170867.5, electric drive axle, the electric drive axle includes a power output device, an input shaft connected to a power output shaft of the power output device, a primary driving gear sleeved on the input shaft, and an electromagnetic clutch device connected between the input shaft and the primary driving gear, the electromagnetic clutch device is configured to selectively receive power of the input shaft so as to have a first state in which the power is output by the and driving gears, and a second state in which the power is output. The electric drive axle transmits the power generated by the power output device to the electric drive axle through the input shaft, and the electromagnetic clutch device selectively receives the power transmitted by the input shaft, so that the electric drive axle has the technical defects of complex structure and large occupied chassis area.
Disclosure of utility model
The utility model aims to solve the technical problems of the prior art that an electric drive bridge occupies a chassis space, is large in weight, low in transmission efficiency and high in energy consumption, and provides an electric drive bridge power transmission system.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
In a first aspect, the present utility model provides an electric drive axle power transfer system comprising a motor, a left secondary planetary row, a primary planetary row, a differential, and a right secondary planetary row; the primary planet row comprises a primary sun gear fixed on a primary planet carrier; the differential comprises a differential first sun gear and a differential second sun gear which are fixed on a differential planet carrier; the left secondary planet row comprises a left secondary sun gear fixed on a left secondary planet carrier; the right secondary planet row comprises a right secondary sun gear fixed on a right secondary planet carrier; the gear ring of the primary sun gear is fixedly connected to the electric drive axle housing; the primary planet carrier is fixedly connected with the differential mechanism planet carrier;
The motor is in power connection with the primary sun gear, and power is sequentially transmitted to the primary sun gear, the primary planet carrier and the differential planet carrier by the motor; the differential planet carrier transmits power to a first differential sun gear and a second differential sun gear; the first sun gear of the differential mechanism is in power connection with the left secondary sun gear, and the second sun gear of the differential mechanism is in power connection with the right secondary sun gear; the left secondary planet carrier is in power connection with left wheels, and the right secondary sun wheel is in power connection with right wheels.
The utility model is further improved in that:
The primary planet carrier and the differential planet carrier are of an integrated structure.
The motor includes a motor stator and a motor rotor.
And the motor rotor is connected with the first-stage sun gear through an output shaft.
The output shaft is connected with the first-stage sun gear through a spline.
The differential mechanism first sun wheel is connected with the left secondary sun wheel through a differential mechanism left half shaft; and the second sun gear of the differential mechanism is connected with the right secondary sun gear through the right half shaft of the differential mechanism.
The left secondary planet carrier power is connected with left wheels through an electric drive axle left half shaft, and the right secondary sun wheel is connected with right wheels through an electric drive axle right half shaft.
The left secondary planet carrier is connected with the left half shaft of the electric drive axle through an internal spline, and the right secondary sun gear is connected with the right half shaft of the electric drive axle through an internal spline.
The differential mechanism further comprises three groups of planetary gear sets, and each group of planetary gear sets comprises two planet gears which are meshed in a staggered mode.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model discloses an electric drive bridge power transmission system, which is more convenient for chassis arrangement by designing a motor, a transmission shaft and a drive axle into a highly integrated power transmission route, thereby not only effectively releasing chassis space and reducing chassis weight, but also further increasing load and reducing energy consumption. Therefore, the comprehensive efficiency of the system is higher, the weight is lighter, the endurance mileage is obviously improved, and the system has high economical efficiency; meanwhile, the high-integration arrangement of the chassis enables the space position setting of the chassis to be more flexible, the NVH performance of the automobile to be better, and the driving experience is better; and the reliability of the core transmission component is higher, and the maintenance cost is lower.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electric drive axle power transmission system in the present utility model.
Wherein: 1-left second-stage planetary rows; 2-primary planet rows; 3-differential; 4-right second-stage planetary rows; 5-a motor stator; 6-a motor rotor; 7-a differential left half shaft; 8-a differential right half shaft; 9-an electric drive axle right half shaft; 10-an electric drive axle left half shaft.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, an embodiment of the utility model discloses an electric drive axle power transmission system, which comprises a motor, a left secondary planetary row 1, a primary planetary row 2, a differential 3 and a right secondary planetary row 4; the primary planet row 2 comprises a primary sun gear fixed on a primary planet carrier; the differential 3 comprises a differential first sun gear and a differential second sun gear which are fixed on a differential planet carrier; the left secondary planet row 1 comprises a left secondary sun gear fixed on a left secondary planet carrier; the right secondary planet row 4 comprises a right secondary sun gear fixed on a right secondary planet carrier; the gear ring of the primary sun gear is fixedly connected to the axle housing of the electric drive axle, and the primary planet carrier outputs power; the primary planet carrier and the differential planet carrier are of an integrated structure; the motor comprises a motor stator 5 and a motor rotor 6.
The motor is in spline connection with the primary sun gear through an output shaft, and power is sequentially transmitted to the primary sun gear, the primary planet carrier and the differential planet carrier by the motor; the differential planet carrier transmits power to a first differential sun gear and a second differential sun gear; the differential mechanism first sun wheel is connected with the left secondary sun wheel through a differential mechanism left half shaft; and the second sun gear of the differential mechanism is connected with the right secondary sun gear through the right half shaft of the differential mechanism. The left secondary planet carrier power is connected with left wheels through an electric drive axle left half shaft, and the right secondary sun wheel is connected with right wheels through an electric drive axle right half shaft. The left secondary planet carrier is connected with the left half shaft of the electric drive axle through an internal spline, and the right secondary sun gear is connected with the right half shaft of the electric drive axle through an internal spline. The differential mechanism 3 comprises two sun gears of a first sun gear of the differential mechanism and a second sun gear of the differential mechanism, and three groups of planetary gear sets, wherein each group of planetary gear sets comprises two planetary gears which are meshed with each other in a staggered way;
The utility model discloses an electric drive bridge power transmission system, which is more convenient for chassis arrangement by designing a motor, a transmission shaft and a drive axle into a highly integrated power transmission route, thereby not only effectively releasing chassis space and reducing chassis weight, but also further increasing load and reducing energy consumption. Therefore, the comprehensive efficiency of the system is higher, the weight is lighter, the endurance mileage is obviously improved, and the system has high economical efficiency; meanwhile, the high-integration arrangement of the chassis enables the space position setting of the chassis to be more flexible, the NVH performance of the automobile to be better, and the driving experience is better; and the reliability of the core transmission component is higher, and the maintenance cost is lower.
The power transmission route of the present utility model is as follows:
(1) The power of the motor is transmitted from the motor rotor 6 to the primary sun gear of the primary planetary gear set 2 through an output shaft;
(2) The primary sun gear of the primary planet row 2 is used as an end input to transmit power to the primary planet carrier of the primary planet row 2;
(3) The primary planet carrier of the primary planet row 2 and the differential planet carrier of the differential 3 are integrated, and at the moment, the differential planet carrier of the differential 3 serves as an input end to transmit power to a differential first sun gear and a differential second sun gear of the differential 3;
(4) The differential mechanism first sun wheel is connected with the left secondary sun wheel through a differential mechanism left half shaft; the second sun gear of the differential mechanism is connected with the right secondary sun gear through the right half shaft of the differential mechanism, and transmits power;
(5) The left secondary sun gear and the right secondary sun gear are used as input ends to transmit power to a fixed secondary planet carrier;
(6) The power of the left secondary planet carrier is connected with left wheels through a left half shaft of the electric drive axle, the right secondary sun wheel is connected with right wheels through a right half shaft of the electric drive axle, and the power is transmitted to the wheels on two sides, so that the power transmission is completed.
The working principle of the utility model is as follows:
The utility model designs a coaxial electric drive axle, wherein the power of the coaxial electric drive axle is firstly transmitted to a primary sun gear of a primary planet row 2 by a motor output spline shaft, the primary sun gear is used as the power input of the primary planet row 2, a gear ring is fixed on an axle housing of the electric drive axle, and a primary planet carrier is used as the power output; the primary planet carrier of the primary planet row 2 and the differential planet carrier in the differential mechanism 3 are integrated, at the moment, the differential planet carrier is used as a power input end of the differential mechanism, and a differential sun gear is used as a power output end. When the vehicle runs normally and linearly, the differential mechanism planet carrier rotates as a whole to output power, and the planet wheels of the differential mechanism 3 are fixed on the differential mechanism planet carrier by the planet shafts, so that the planetary wheels revolve along with the differential mechanism planet carrier, and no rotation speed difference exists between the wheels at two sides; when the vehicle turns, the speed difference is generated between the speeds of the two sides, the speed of the inner measured wheel is reduced, the speed of the outer wheel is increased, at the moment, the planetary wheels connected with the outer wheels in the differential mechanism 3 rotate forwards, the planetary wheels connected with the inner wheels rotate backwards, and the rotation speeds are the same and opposite to each other due to the engagement of the planetary wheels, so that the speed difference is generated.
The power output by the differential mechanism sun gear is output to the left and right wheels through two half shafts respectively, the sun gears of the two-stage planetary rows on the left and right sides are connected, the sun gears of the two-stage planetary rows are used as the power input of the two-stage planetary rows, the large gear ring is fixed at the moment, the two-stage planetary frame is used as an output element, and the internal spline of the planetary frame is connected with the half shafts on the two ends to transmit the power to the wheels on the two sides.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The electric drive axle power transmission system is characterized by comprising a motor, a left secondary planetary row (1), a primary planetary row (2), a differential mechanism (3) and a right secondary planetary row (4); the primary planet row (2) comprises a primary sun gear fixed on a primary planet carrier; the differential mechanism (3) comprises a differential mechanism first sun gear and a differential mechanism second sun gear which are fixed on a differential mechanism planet carrier; the left secondary planet row (1) comprises a left secondary sun gear fixed on a left secondary planet carrier; the right secondary planet row (4) comprises a right secondary sun gear fixed on a right secondary planet carrier; the gear ring of the primary sun gear is fixedly connected to the electric drive axle housing; the primary planet carrier is fixedly connected with the differential mechanism planet carrier;
The motor is in power connection with the primary sun gear, and power is sequentially transmitted to the primary sun gear, the primary planet carrier and the differential planet carrier by the motor; the differential planet carrier transmits power to a first differential sun gear and a second differential sun gear; the first sun gear of the differential mechanism is in power connection with the left secondary sun gear, and the second sun gear of the differential mechanism is in power connection with the right secondary sun gear; the left secondary planet carrier is in power connection with left wheels, and the right secondary sun wheel is in power connection with right wheels.
2. The electric drive axle power transfer system of claim 1, wherein the primary planet carrier and differential planet carrier are of unitary construction.
3. An electrically driven bridge power transmission system according to claim 1, characterized in that the electric machine comprises a motor stator (5) and a motor rotor (6).
4. An electrically driven bridge power transmission system according to claim 3, characterized in that the motor rotor (6) is connected to a primary sun gear via an output shaft.
5. The electric drive axle power transfer system of claim 4, wherein the output shaft is connected to the primary sun gear by splines.
6. The electric drive axle power transfer system of claim 1, wherein the differential first sun gear is connected to the left secondary sun gear through a differential left axle shaft; and the second sun gear of the differential mechanism is connected with the right secondary sun gear through the right half shaft of the differential mechanism.
7. The electric drive axle power transfer system of claim 1, wherein the left secondary planet carrier power is coupled to a left wheel through an electric drive axle left axle shaft and the right secondary sun gear is coupled to a right wheel through an electric drive axle right axle shaft.
8. The electric drive axle power transfer system of claim 7, wherein the left secondary planet carrier is connected to the electric drive axle left axle shaft by internal splines, and the right secondary sun gear is connected to the electric drive axle right axle shaft by internal splines.
9. An electrically driven axle power transmission system according to claim 1, characterized in that the differential (3) further comprises three sets of planetary gear sets, each set comprising two intermeshing planetary gears.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221049395U true CN221049395U (en) | 2024-05-31 |
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| GR01 | Patent grant |