CN213705078U - Coaxial integrated electric drive bridge - Google Patents
Coaxial integrated electric drive bridge Download PDFInfo
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- CN213705078U CN213705078U CN202022182589.5U CN202022182589U CN213705078U CN 213705078 U CN213705078 U CN 213705078U CN 202022182589 U CN202022182589 U CN 202022182589U CN 213705078 U CN213705078 U CN 213705078U
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- gearbox
- motor
- axle housing
- electric drive
- drive bridge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The utility model discloses a coaxial integrated electric drive bridge, which comprises a gearbox main shell, wherein a motor stator is fixedly connected inside the gearbox main shell, a motor rotor is assembled inside the motor stator, a motor hollow shaft is fixedly connected inside the motor rotor, and a left half shaft is arranged inside the motor hollow shaft in a penetrating way; one end of the motor hollow shaft is connected with the input end of a speed reducer, the speed reducer is installed inside the main shell of the gearbox, the power output end of the speed reducer is provided with a differential, and the outside of the differential is provided with a side shell of the gearbox; the utility model can realize the coaxial arrangement of the motor rotating shaft and the output shaft of the gearbox; the bearing capacity of the axle housing can be improved, and the fatigue risk is reduced; the weight can be obviously reduced, and the volume can be reduced; the transmission efficiency can be improved, and the power transmission distance can be reduced; the integration level of the electric drive bridge is improved, and the installation complexity is reduced.
Description
Technical Field
The utility model relates to an electricity drive the bridge, specific theory relates to a coaxial integral type electricity drive bridge, belongs to electric automobile power assembly technical field.
Background
Recently, electric commercial vehicles have been developed very rapidly, and electric drive axle technology has not been developed before. However, the traditional electric commercial vehicle adopts a motor to replace an original engine and a transmission, and the scheme is that a driving motor provides power, the power is transmitted to a common drive axle through a transmission shaft and then to wheels to realize vehicle running.
The existing electric automobile electric drive bridge system and the existing problems thereof are as follows:
1. the coaxial electric drive axle has the advantages that the mass of the motor reducer assembly is large, and the motor shell assembly and the axle housing are simultaneously loaded, so that the fatigue risk is caused;
2. a parallel-shaft electric drive axle of which the motor axis is parallel to and non-coaxial with the wheel axis; the motor is integrated in the decelerator, the structure is complicated, the maintenance and replacement are difficult, the cost is high; b. the speed reducing mechanism is complex, and is provided with a gear shifting mechanism, so that the whole weight is heavy, the influence on the performance of a suspension system is large, and the service life of an axle housing and the safety of a speed reducer connecting piece are not easy to guarantee; c. because the motor and the reducer are overlarge in size, the drum brake and the shock absorber are very difficult to configure at the same time, and the adaptability is poor;
3. the wheel-side electric drive axle is short in power transmission route and high in efficiency, and is applied to a low-floor bus; the electric drive axle has the following disadvantages that a, a gearbox cannot be arranged, and the coordination of large output torque and the highest vehicle speed is difficult to realize; b. the motor and the speed reducer are all unsprung masses, so that the unsprung masses are greatly increased, and the smoothness of the whole vehicle is influenced; c. the motor has severe working environment and large vibration and impact.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a coaxial integrated electric drive bridge aiming at the defects in the background technology, which can realize the coaxial arrangement of the motor rotating shaft and the output shaft of the gearbox; the bearing capacity of the axle housing can be improved, and the fatigue risk is reduced; the weight can be obviously reduced, and the volume can be reduced; the transmission efficiency can be improved, and the power transmission distance can be reduced; the integration level of the electric drive bridge is improved, and the installation complexity is reduced.
For solving the technical problem, the utility model discloses a following technical scheme:
a coaxial integrated electric drive bridge comprises a transmission case main shell, wherein a motor stator is fixedly connected inside the transmission case main shell, a motor rotor is assembled inside the motor stator, a motor hollow shaft is fixedly connected inside the motor rotor, and a left half shaft penetrates through the inside of the motor hollow shaft; one end of the motor hollow shaft is connected with the input end of the speed reducer, the speed reducer is installed inside the transmission case body, the power output end of the speed reducer is provided with the differential mechanism, and the transmission case side body is installed outside the differential mechanism.
Further, the inside of the differential is connected with the left half shaft and the right half shaft through splines; the left half shaft and the motor hollow shaft are coaxially arranged.
Furthermore, two ends of the hollow shaft of the motor are in rolling connection with the main shell of the gearbox through bearings.
Further, the gearbox side shell is fixedly connected with the gearbox main shell through bolts.
Furthermore, a left axle housing is sleeved on the main body of the left half shaft, a left axle housing flange is arranged at one end of the left axle housing close to the main shell of the gearbox, and the left axle housing flange is fixedly connected with the main shell of the gearbox through bolts; the cover is equipped with right axle housing in the main part of right semi-axis, and the one end that right axle housing is close to the main casing body of gearbox is equipped with right axle housing flange, and right axle housing flange passes through the bolt rigid coupling with the main casing body of gearbox, and right axle housing flange passes through the bolt rigid coupling with the casing of gearbox.
Further, a motor controller is further installed inside the gearbox main shell, and the motor controller is fixed above the motor stator and the speed reducer.
Further, the outside cover of gearbox main casing is equipped with strengthens the sleeve, strengthens telescopic both ends and passes through the bolt rigid coupling with left axle housing flange and right axle housing flange.
Furthermore, a plurality of reinforcing sleeve holes are formed in the main body of the reinforcing sleeve.
Further, the right axle shaft extends through the transmission case side housing.
The utility model adopts the above technical scheme after, compare with prior art, have following advantage:
the utility model adopts a hollow shaft type design for the motor rotating shaft, the left half shaft can pass through the inside of the motor and is connected with the differential mechanism, the coaxial arrangement of the motor rotating shaft and the output shaft of the gearbox is realized, and the design and installation of an electric drive bridge are facilitated;
the utility model adopts the structural design of the reinforcing sleeve, which can improve the bearing capacity of the axle housing and reduce the fatigue risk;
the utility model adopts a lightweight design, has compact structure, obviously lightens the weight and reduces the volume;
the utility model adopts the integrated structure design of the power assembly, has compact structure, improves the transmission efficiency and reduces the power transmission distance;
the utility model integrates the motor, the reducer and the motor controller into the main shell of the gearbox, thereby improving the integration level of the electric drive bridge and reducing the installation complexity;
the utility model discloses an use and effectively improved load weight and continuation of the journey mileage, have the production practice meaning of great.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a structural sectional view of the present invention;
in the figure, the position of the upper end of the main shaft,
1-left axle shaft, 2-left axle housing, 21-left axle housing flange, 3-transmission main housing, 4-motor stator, 5-motor rotor, 6-motor controller, 7-motor hollow shaft, 8-speed reducer, 9-differential, 10-transmission side housing, 11-right axle housing, 111-right axle housing flange, 12-right axle shaft, 13-reinforcing sleeve and 131-reinforcing sleeve hole.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2 jointly, the utility model provides a coaxial integral type electricity bridge of driving, including the main casing body 3 of gearbox, the internally mounted of the main casing body 3 of gearbox has motor stator 4, motor stator 4 and the main casing body 3 fixed connection of gearbox.
The inside of motor stator 4 is equipped with electric motor rotor 5, and electric motor rotor 5's inside is worn to be equipped with motor hollow shaft 7, and motor hollow shaft 7 and electric motor rotor 5 fixed connection, electric motor rotor 5 drive motor hollow shaft 7 and realize rotating.
Two ends of the motor hollow shaft 7 are in rolling connection with the gearbox main shell 3 through bearings; one end of the motor hollow shaft 7 is connected with the input end of the speed reducer 8.
The reduction gear 8 is installed in the inside of the main casing body 3 of the gearbox, the differential 9 is installed at the power output end of the reduction gear 8, and the reduction gear 8 transmits the rotating power of the hollow shaft 7 of the motor to the differential 9 after reducing the speed.
A gearbox side shell 10 is mounted outside the differential 9, and the gearbox side shell 10 is fixedly connected with the gearbox main shell 3 through bolts; the inside of the differential mechanism 9 is connected with the left half shaft 1 and the right half shaft 12 through splines; the left half shaft 1 and the right half shaft 12 are coaxially arranged.
The left half shaft 1 penetrates through the inner part of the motor hollow shaft 7, the left half shaft 1 and the motor hollow shaft 7 are coaxially arranged, and the left half shaft 1 is rotatably connected with the motor hollow shaft 7.
The right axle shaft 12 extends through the transmission case side housing 10.
A left axle housing 2 is sleeved on the main body of the left half shaft 1, a left axle housing flange 21 is arranged at one end of the left axle housing 2 close to the main shell 3 of the transmission case, and the left axle housing flange 21 is fixedly connected with the main shell 3 of the transmission case through bolts; the cover is equipped with right axle case 11 in the main part of right half axle 12, and the one end that right axle case 11 is close to the main casing body 3 of gearbox is equipped with right axle case flange 111, and right axle case flange 111 passes through bolt fixed connection with the main casing body 3 of gearbox, and right axle case flange 111 passes through bolt fixed connection with the casing 10 of gearbox.
And a motor controller 6 is also arranged in the gearbox main shell 3, and the motor controller 6 is fixed above the motor stator 4 and the speed reducer 8.
A cylindrical reinforcing sleeve 13 is sleeved outside the main shell 3 of the gearbox, one end of the reinforcing sleeve 13 is fixedly connected with the left axle housing flange 21 through a bolt, and the other end of the reinforcing sleeve 13 is fixedly connected with the right axle housing flange 111 through a bolt; the reinforcing sleeve 13 can increase the load-bearing capacity of the electrically driven rear axle and reduce the risk of fatigue.
A plurality of strengthening sleeve holes 131 have been seted up in strengthening sleeve 13's the main part, strengthen sleeve holes 131 and both can reduce the weight of electricity drive bridge, realize the lightweight design, can strengthen the radiating effect again.
The utility model discloses a concrete theory of operation:
the motor rotor 5 rotates to drive the motor hollow shaft 7 to rotate, the motor hollow shaft 7 inputs rotary power into the speed reducer 8, the speed reducer 8 reduces the speed of the rotary power and transmits the rotary power to the differential mechanism 9, and the differential mechanism 9 outputs the power to a vehicle hub through the left half shaft 1 and the right half shaft 12 respectively; the left axle housing flange 21 is fixedly connected with the transmission case main body 3 and the reinforcing sleeve 13 through bolts, and the right axle housing flange 111 is fixedly connected with the transmission case main body 3, the transmission case side housing 10 and the reinforcing sleeve 13 through bolts to be installed into a whole, so that the bearing capacity of the electrically-driven rear axle is improved, the fatigue risk is reduced, the installation is facilitated, and the cost is reduced; the utility model discloses well motor, reduction gear 8 and motor controller 6 are integrated to the inside of the gearbox main casing body 3, improve the integrated level of the bridge of electricity drive, reduce the installation complexity.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (9)
1. A coaxial integral type electricity drive bridge, includes gearbox main casing (3), its characterized in that: a motor stator (4) is fixedly connected inside the gearbox main shell (3), a motor rotor (5) is assembled inside the motor stator (4), a motor hollow shaft (7) is fixedly connected inside the motor rotor (5), and a left half shaft (1) penetrates through the inside of the motor hollow shaft (7); one end of the motor hollow shaft (7) is connected with the input end of the speed reducer (8), the speed reducer (8) is installed inside the gearbox main shell (3), the differential (9) is installed at the power output end of the speed reducer (8), and the gearbox side shell (10) is installed outside the differential (9).
2. A coaxial integral electric drive bridge according to claim 1, wherein: the inside of the differential (9) is connected with the left half shaft (1) and the right half shaft (12) through splines; the left half shaft (1) and the motor hollow shaft (7) are coaxially arranged.
3. A coaxial integral electric drive bridge according to claim 1, wherein: and two ends of the motor hollow shaft (7) are in rolling connection with the gearbox main shell (3) through bearings.
4. A coaxial integral electric drive bridge according to claim 1, wherein: the gearbox side shell (10) is fixedly connected with the gearbox main shell (3) through bolts.
5. A coaxial integral electric drive bridge according to claim 2, wherein: a left axle housing (2) is sleeved on a main body of the left half shaft (1), a left axle housing flange (21) is arranged at one end of the left axle housing (2), and the left axle housing flange (21) is fixedly connected with a main shell (3) of the transmission through bolts; the main part of right half axle (12) is gone up the cover and is equipped with right axle housing (11), and the one end of right axle housing (11) is equipped with right axle housing flange (111), and right axle housing flange (111) passes through bolt rigid coupling with the main casing body of gearbox (3), and right axle housing flange (111) passes through bolt rigid coupling with gearbox side casing (10).
6. A coaxial integral electric drive bridge according to claim 1, wherein: the gearbox is characterized in that a motor controller (6) is further installed inside the gearbox main shell (3), and the motor controller (6) is fixed above the motor stator (4) and the speed reducer (8).
7. A coaxial integral electric drive bridge according to claim 1, wherein: the outside cover of gearbox main casing body (3) is equipped with strengthens sleeve (13), strengthens the both ends of sleeve (13) and passes through the bolt rigid coupling with left axle housing flange (21) and right axle housing flange (111).
8. The coaxial integrated electric drive bridge of claim 7, wherein: a plurality of reinforcing sleeve holes (131) are formed in the main body of the reinforcing sleeve (13).
9. The coaxial integrated electric drive bridge of claim 5, wherein: the right half shaft (12) penetrates through the gearbox side shell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182589.5U CN213705078U (en) | 2020-09-29 | 2020-09-29 | Coaxial integrated electric drive bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182589.5U CN213705078U (en) | 2020-09-29 | 2020-09-29 | Coaxial integrated electric drive bridge |
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| Publication Number | Publication Date |
|---|---|
| CN213705078U true CN213705078U (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022182589.5U Active CN213705078U (en) | 2020-09-29 | 2020-09-29 | Coaxial integrated electric drive bridge |
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| CN (1) | CN213705078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE2151169A1 (en) * | 2021-09-24 | 2023-03-25 | Scania Cv Ab | Half-shaft seal, axle-beam and vehicle |
-
2020
- 2020-09-29 CN CN202022182589.5U patent/CN213705078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE2151169A1 (en) * | 2021-09-24 | 2023-03-25 | Scania Cv Ab | Half-shaft seal, axle-beam and vehicle |
| SE545497C2 (en) * | 2021-09-24 | 2023-10-03 | Scania Cv Ab | Half-shaft seal, axle-beam and vehicle |
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