CN213108869U - Centralized coaxial electric drive axle - Google Patents
Centralized coaxial electric drive axle Download PDFInfo
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- CN213108869U CN213108869U CN202021278743.2U CN202021278743U CN213108869U CN 213108869 U CN213108869 U CN 213108869U CN 202021278743 U CN202021278743 U CN 202021278743U CN 213108869 U CN213108869 U CN 213108869U
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Abstract
A centralized coaxial electric drive axle, comprising: a drive motor; the speed reduction planet row comprises a first sun wheel, a first planet wheel, a first gear ring and a first frame, wherein the first sun wheel is connected with the driving motor, and the first planet wheel is connected with the first frame; the composite planet row differential comprises a second sun gear, a second planet wheel, a third sun gear, a third planet wheel and a second frame, wherein the second sun gear is connected with a first output half shaft, the third sun gear is connected with a second output half shaft, the second planet wheel and the third planet wheel are mutually meshed, and the second frame is connected with the first frame, the second planet wheel and the third planet wheel; one end of the differential lock is connected with the second frame, and the other end of the differential lock is connected with the second output half shaft; the speed reduction planetary row, the composite planetary row differential mechanism and the differential lock are coaxially arranged. The overall arrangement convenience and compactness of the electric drive axle are realized, and the energy output, the energy recovery and the stepless speed control of the vehicle are realized.
Description
Technical Field
The utility model belongs to machinery and vehicle transmission field, concretely relates to centralized coaxial electric drive axle.
Background
Chinese patent ZL201820170867.5 discloses an electric drive axle, which includes a power output device, an input shaft connected with 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, wherein the electromagnetic clutch device is configured to selectively receive power of the input shaft to have a first state in which the power is output by the primary driving gear and a second state in which the output of the power is interrupted. The electric drive axle transmits the power generated by the power output device to the electric drive axle through the input shaft, the electromagnetic clutch device selectively receives the power transmitted by the input shaft, and compared with a synchronizer or a clutch in the traditional electric drive axle, the electromagnetic clutch device has higher response speed and better practicability.
However, the conventional electric drive axle including the above patent has disadvantages of large size, not compact layout, occupying much space, and the like.
Therefore, there is a need to develop a centralized coaxial electric drive bridge to solve one or more of the above-mentioned technical problems.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one technical problem, according to the utility model discloses an aspect provides a centralized coaxial electric drive axle, its characterized in that includes:
a drive motor;
the speed reduction planet row comprises a first sun wheel, a first planet wheel, a first gear ring and a first frame, wherein the first sun wheel is connected with the driving motor, and the first planet wheel is connected with the first frame;
the composite planet row differential comprises a second sun gear, a second planet wheel, a third sun gear, a third planet wheel and a second frame, wherein the second sun gear is connected with a first output half shaft, the third sun gear is connected with a second output half shaft, the second planet wheel and the third planet wheel are mutually meshed, and the second frame is connected with the first frame, the second planet wheel and the third planet wheel; and
one end of the differential lock is connected with the second frame, and the other end of the differential lock is connected with the second output half shaft;
the speed reduction planetary row, the composite planetary row differential mechanism and the differential lock are coaxially arranged.
According to another aspect of the present invention, the drive motor has a hollow structure through which the first output half shaft passes.
According to the utility model discloses still another aspect, first ring gear is connected with the box.
According to the utility model discloses a still another aspect, second sun gear and second planet wheel meshing, third sun gear and third planet wheel meshing.
According to a further aspect of the invention, the electric drive axle has a fixed planetary reduction gear.
According to the utility model discloses in another aspect, driving motor, first output semi-axis and second output semi-axis are arranged along same central line.
According to another aspect of the present invention, the differential lock includes an end face differential lock or a wet clutch differential lock.
According to another aspect of the present invention, the driving motor has a driving mode and a power generation mode.
According to yet another aspect of the present invention, the first planet is a cone pulley.
In accordance with yet another aspect of the present invention, the first output half shaft and the second output half shaft extend in opposite directions.
The utility model discloses can obtain following one or more technological effect:
a planetary reducer and a differential are designed in a centralized way; the half shafts are connected to the differential mechanism through the motor center by utilizing the motor space, so that the overall arrangement convenience and compactness of the electric drive axle can be realized; the application of the electric drive axle realizes the energy output, energy recovery and stepless speed control of the vehicle; under different operation demand states of the vehicle, the motor can enter a driving and energy recovery mode, and the requirement of the whole vehicle in the rotating speed range can be met by matching with the planetary reduction mechanism.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of a centralized coaxial electric drive bridge according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of a centralized coaxial electric drive bridge according to another preferred embodiment of the present invention.
Detailed Description
The best mode of the present invention will be described in detail with reference to the accompanying drawings, wherein the detailed description is to be regarded as illustrative in nature and not as restrictive, and various changes and modifications may be made without departing from the spirit and scope of the present invention.
Example 1
Referring to fig. 1-2, wherein fig. 1 is a schematic diagram of a centralized coaxial electric drive bridge according to a preferred embodiment of the present invention; fig. 2 is a schematic diagram of a centralized coaxial electric drive bridge according to another preferred embodiment of the present invention.
Referring to fig. 1, according to a preferred embodiment of the present invention, there is provided a centralized coaxial electric drive axle, including:
a drive motor 101;
a reduction planetary gear set including a first sun gear 104, a first planetary gear 105, a first ring gear 106, and a first frame, the first sun gear 104 being connected to the driving motor 101, the first planetary gear 105 being connected to the first frame;
a compound planet row differential mechanism comprises a second sun gear 107, a second planet gear 108, a third sun gear 110, a third planet gear 111 and a second frame 109, wherein the second sun gear 107 is connected with a first output half shaft 102, the third sun gear 110 is connected with a second output half shaft 103, the second planet gear 108 and the third planet gear 111 are mutually meshed, and the second frame 109 is connected with the first frame, the second planet gear 108 and the third planet gear 111; and
a differential lock 112 having one end connected to the second frame 109 and the other end connected to the second output half shaft 103;
wherein, the reduction planet row, the composite planet row differential and the differential lock 112 are coaxially arranged.
It is understood that, as shown in fig. 1, the first frame (not labeled) and the second frame 109 may be connected to form an integral structure.
According to a preferred embodiment of the present invention, the driving motor (power motor) 101 has a hollow structure through which the first output half shaft 102 passes.
According to a preferred embodiment of the present invention, the first ring gear 106 is connected to the housing.
According to a preferred embodiment of the invention, the second sun gear 107 meshes with the second planet gears 108, and the third sun gear 110 meshes with the third planet gears 111.
According to a preferred embodiment of the invention, the electric drive axle has a fixed planetary reduction gear.
According to a preferred embodiment of the present invention, the driving motor 101, the first output half shaft 102 and the second output half shaft 103 are arranged along the same center line.
According to a preferred embodiment of the present invention, the differential lock 112 comprises an end face differential lock or a wet clutch differential lock.
According to a preferred embodiment of the present invention, the driving motor 101 has a driving mode and a power generation mode.
According to a preferred embodiment of the present invention, referring to fig. 2, the first planet wheel is a cone pulley 205. Otherwise, the other components correspond to those in fig. 1. Wherein 201 is a driving motor; 202 is the output half shaft a (first output half shaft); 203 is output half shaft B (second output half shaft); 204 is a planet row sun gear (first sun gear); 205 is a planet row planet wheel (first planet wheel); 206 is a planet row ring gear (first ring gear); 207 is differential planet row sun gear a (second sun gear); 208 is a differential planet wheel a (second planet wheel); 209 is a planet row frame (second frame); 210 is differential planet row sun gear B (third sun gear); 211 is a differential planet wheel B (second planet wheel); 212 is a differential lock.
In accordance with a preferred embodiment of the present invention, first output half shaft 102 and second output half shaft 103 extend in opposite directions.
The utility model discloses can obtain following one or more technological effect:
a planetary reducer and a differential are designed in a centralized way; the half shafts are connected to the differential mechanism through the motor center by utilizing the motor space, so that the overall arrangement convenience and compactness of the electric drive axle can be realized; the application of the electric drive axle realizes the energy output, energy recovery and stepless speed control of the vehicle; under different running demand states of the vehicle, the motor can enter a driving and energy recovery mode, and the requirement of the whole vehicle in a rotating speed range can be met by matching with a planetary reduction mechanism; the driving power input is distributed, independent power output can be realized on each driving axle, so that the vehicle has the pure electric driving functions of energy output and energy recovery, and the original universal shaft of the transmission, the transfer case and power transmission is replaced.
Example 2
Referring to fig. 1, according to a preferred embodiment of the present invention, there is provided a centralized coaxial electric drive axle, including:
a drive motor 101 as a power input;
the half shaft as power output is divided into a left half shaft 102 and a right half shaft 103;
as a planetary reduction mechanism for reducing speed, a running speed variation range of a vehicle can be satisfied;
the differential mechanism serving as the differential between the wheels can meet the requirements of different speeds of the wheels at the two sides of the vehicle during steering;
the differential lock 112 as a lock can ensure the power output of the vehicle on a difficult road surface.
Preferably, the input motor (driving motor) has a hollow structure, and a power output half shaft on one side can penetrate through the hollow structure; the electric drive axle has a reduction planetary row, a planetary differential and a differential lock 112; the electric drive axle has a fixed planetary reduction gear, and the characteristics of the stepless electric drive axle are realized by matching with the rotating speed range of the motor.
According to a further preferred embodiment of the present invention, the driving motor 101 is coupled as power to the sun gear 104 of the first planetary row.
According to a further preferred embodiment of the present invention, the first planetary row frame is connected to the planetary differential frame 109; the first planetary gear set 106 is coupled to the case.
According to a further preferred embodiment of the invention, the first planetary row comprises a solution in which the planetary wheels are changed to stepped wheels 205, as shown in fig. 2.
According to a further preferred embodiment of the present invention, the electric drive axle has a compound planetary differential of integrated design; the planet row differential is formed by a compound planet row, two half shafts 102 and 103 are respectively connected with a sun gear 104 and a sun gear 110 of the planet row differential, and two planet gears 108 and 111 of the planet row differential are meshed with each other to form coupling teeth of the compound planet row.
According to the utility model discloses a still another preferred embodiment, a power motor and power input/output are arranged at same central line, have reduced the overall height of electric drive axle and are favorable to the system layout.
According to another preferred embodiment of the present invention, the compound planetary differential has a differential lock 112, and the differential lock 112 may be a common end surface differential lock 112 or a wet clutch differential lock 112;
according to the utility model discloses a still another preferred embodiment, the power motor can operate in drive mode and also can operate in the mode of generating electricity, satisfies vehicle economic nature demand.
According to the utility model discloses a preferred embodiment, this electric drive axle can turn into power output to the output shaft with electric energy, also can be with the energy recuperation of vehicle deceleration in-process, this electric drive axle has two fender planetary reducer and can high-efficient operation in than wide scope. The electric drive axle is integrated with a planetary differential and an inter-wheel differential lock 112.
According to a further preferred embodiment of the present invention, the electric drive axle is an axle with a continuously adjustable motor drive speed. Wherein the sun gear 104 of the planet row is connected with the power motor 101; the gear ring 106 of the star row can also be connected to the box body through a brake to realize braking; the planet row frame is connected to the frame of the differential planet row 109. The differential planet row with integrated design can realize the function of the differential in a smaller space and can adaptively change the parameters of the planet row according to the requirement of load; the planetary differential also has a differential lock 112 element to effect inter-wheel differential locking.
According to another preferred embodiment of the present invention, as shown in fig. 1, there is also provided a centralized coaxial electric drive bridge 100, comprising: a drive motor 101; a planetary row sun gear 104 for power input; a planetary row planetary wheel 105; a planet row ring gear 106; a planet carrier 109; a compound planetary row differential and a differential lock 112; output half shafts 102 and output half shafts 103.
According to another preferred embodiment of the present invention, the coaxial electric drive axle planetary gear is a mechanism with a fixed reduction ratio, and the power of the driving motor 101 enters the planetary gear through the planetary gear sun gear 104, and is output to the composite planetary gear differential mechanism through the planetary gear frame 109 after the rotation speed of the driving motor 101 is reduced.
According to another preferred embodiment of the present invention, the driving motor 101 converts the electric energy into mechanical energy, and then enters the planetary differential after the conversion of the planetary row. The planetary differential is implemented by a compound planet row without a ring gear. The compound planetary differential can realize 1: the output of the torque 1 meets the requirement that the vehicle outputs the same force through the left wheel and the right wheel on different road surfaces. The compound planetary differential mechanism can be locked through the differential lock 118, and the requirement that the vehicle runs on a difficult road surface is met.
According to another preferred embodiment of the present invention, the driving motor has two working modes in total, i.e. the electric driving outputs mechanical energy, called D mode; absorbing mechanical energy to generate electric energy, namely R mode;
according to another preferred embodiment of the present invention, the driving motor 101 can operate in D, R two modes, so that two operating states of motor driving and planetary reduction part cooperation can occur: a driving state and a power generation state.
According to another preferred embodiment of the present invention, for convenience of explaining different working states of the two-gear centralized electric drive axle, the value K of the planet row is exemplified as 3.5; the reduction ratio of the mechanism formed by the planet rows obtained in this way is 3.5; the initial condition is that the motor speed is 0r/min to 8520r/min at the low gear and the vehicle speed is 0km/h to 120 km/h.
According to another preferred embodiment of the present invention, to illustrate the operation mode of the present invention, the motor is decelerated and then a planetary differential is adopted, the differential is formed by a compound planetary structure of double sun gears and double planetary gears, the number of teeth of the sun gear 107 on one side is 51 teeth, and the number of teeth of the planetary gear 108 is 17 teeth; the number of teeth of the sun gear 110 on one side is 57 teeth, and the number of teeth of the planet gear 111 is 19 teeth; the planetary differential mechanism formed in this way can be arranged side by side to reduce the axial space, and simultaneously, the condition that the wheels on two sides obtain the same driving torque when the differential lock 112 is separated is met. Preferably, the structure of fig. 2 can further improve the reduction ratio of the planetary reduction, and the principle of fig. 2 is the same as that of fig. 1, and is not illustrated here.
According to the utility model discloses a still another preferred embodiment, the motor is according to whole car operation demand, and under the same speed of a motor vehicle state, the motor can be in drive mode also can be in the mode of electricity generation. Therefore, energy can be recovered during the deceleration or downhill process of the vehicle, the economy of the vehicle is improved, and on the other hand, the engine and the generator can be selectively operated in an economic area for the hybrid vehicle, so that the economy of the vehicle is further improved.
The utility model discloses can obtain following one or more technological effect:
a planetary reducer and a differential are designed in a centralized way; the half shafts are connected to the differential mechanism through the motor center by utilizing the motor space, so that the overall arrangement convenience and compactness of the electric drive axle can be realized; the application of the electric drive axle realizes the energy output, energy recovery and stepless speed control of the vehicle; under different running demand states of the vehicle, the motor can enter a driving and energy recovery mode, and the requirement of the whole vehicle in a rotating speed range can be met by matching with a planetary reduction mechanism; the driving power input is distributed, independent power output can be realized on each driving axle, so that the vehicle has the pure electric driving functions of energy output and energy recovery, and the original universal shaft of the transmission, the transfer case and power transmission is replaced.
It will be appreciated that the various embodiments described above may be combined with each other to produce yet another embodiment.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A centralized coaxial electric drive axle, comprising:
a drive motor;
the speed reduction planet row comprises a first sun wheel, a first planet wheel, a first gear ring and a first frame, wherein the first sun wheel is connected with the driving motor, and the first planet wheel is connected with the first frame;
the composite planet row differential comprises a second sun gear, a second planet wheel, a third sun gear, a third planet wheel and a second frame, wherein the second sun gear is connected with a first output half shaft, the third sun gear is connected with a second output half shaft, the second planet wheel and the third planet wheel are mutually meshed, and the second frame is connected with the first frame, the second planet wheel and the third planet wheel; and
one end of the differential lock is connected with the second frame, and the other end of the differential lock is connected with the second output half shaft;
the speed reduction planetary row, the composite planetary row differential mechanism and the differential lock are coaxially arranged.
2. The centralized coaxial electric drive bridge of claim 1, wherein: the drive motor has a hollow structure through which the first output half shaft passes.
3. The centralized coaxial electric drive bridge of claim 2, wherein: the first gear ring is connected with the box body.
4. The centralized coaxial electric drive bridge of any of claims 1-3, wherein: the second sun gear is meshed with the second planet gears, and the third sun gear is meshed with the third planet gears.
5. The centralized coaxial electric drive bridge of claim 4, wherein: the electric drive axle has a fixed planetary reduction gear.
6. The centralized coaxial electric drive axle of claim 5, wherein the drive motor, the first output half shaft, and the second output half shaft are disposed along a common centerline.
7. The centralized coaxial electric drive axle of claim 5, wherein the differential lock comprises a face differential lock or a wet clutch differential lock.
8. The centralized coaxial electric drive axle of claim 2, wherein the drive motor has a drive mode and a generate mode.
9. The centralized coaxial electric drive bridge of claim 4, wherein: the first planet wheel is a cone pulley.
10. The centralized coaxial electric drive axle of claim 6, wherein the first output half shaft and the second output half shaft extend in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021278743.2U CN213108869U (en) | 2020-07-03 | 2020-07-03 | Centralized coaxial electric drive axle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021278743.2U CN213108869U (en) | 2020-07-03 | 2020-07-03 | Centralized coaxial electric drive axle |
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| CN213108869U true CN213108869U (en) | 2021-05-04 |
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| CN202021278743.2U Active CN213108869U (en) | 2020-07-03 | 2020-07-03 | Centralized coaxial electric drive axle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN114771182A (en) * | 2022-06-21 | 2022-07-22 | 南通睿动新能源科技有限公司 | Automobile electric driving transmission system, power integration device and flying electric driving automobile |
-
2020
- 2020-07-03 CN CN202021278743.2U patent/CN213108869U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN111873711B (en) * | 2020-07-03 | 2021-10-29 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN114771182A (en) * | 2022-06-21 | 2022-07-22 | 南通睿动新能源科技有限公司 | Automobile electric driving transmission system, power integration device and flying electric driving automobile |
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