CN212332293U - Integrated form second grade speed reduction electric drive axle - Google Patents
Integrated form second grade speed reduction electric drive axle Download PDFInfo
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- CN212332293U CN212332293U CN202020687296.XU CN202020687296U CN212332293U CN 212332293 U CN212332293 U CN 212332293U CN 202020687296 U CN202020687296 U CN 202020687296U CN 212332293 U CN212332293 U CN 212332293U
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Abstract
The utility model discloses an integrated secondary speed reduction electric drive axle, which comprises an integrated shell, wherein a motor, a secondary parallel speed reduction gear set and a differential mechanism which are connected in sequence in the integrated shell are arranged in the integrated shell, the integrated shell is of an integrated structure, and the differential mechanism is constructed as a cylindrical gear differential mechanism; still including bearing the frame, semi-axis and wheel, the semi-axis setting is bearing the frame outside, and the wheel is connected to the one end of semi-axis and the output of differential mechanism and the other end, and the parallel reduction gear train of second grade includes the one-level action wheel with the motor output shaft coaxial coupling of motor, the one-level follower of being connected with the meshing of one-level action wheel, the second grade action wheel with one-level follower coaxial coupling, the second grade follower of being connected with the meshing of second grade action wheel, the second grade follower with the casing of differential mechanism is connected. The integrated level is high, and whole car suitability is good, adopts cylindrical gear differential mechanism to guarantee even meshing of gear and steady power output under the high rotational speed, and is shorter at the axial dimension, and the structure is compacter.
Description
Technical Field
The utility model relates to an electric automobile technical field, especially an integrated form second grade speed reduction electric drive axle.
Background
In the face of global energy crisis and environmental problems, the automobile industry is undoubtedly a big household of energy consumption and air pollution, under the international environment of energy conservation and emission reduction and under the strong support of governments on new energy services, the demand of pure electric vehicles rises year by year, the power form of an electric drive bridge of a motor and a gearbox gradually becomes the direction of cooperative development of various automobile enterprises, and the electric drive bridge is a main part of a power assembly and plays a particularly key role in a drive system. The transmission mode of the motor is small in gear ratio, the variable speed output of the motor cannot be well realized, the working strength of the motor is increased, the transmission mode is not stable in operation, and the motor cannot be well adapted to high-speed operation of the motor.
Therefore, an electric drive axle with a speed reducer and a differential is provided in the prior art to solve the above problems, for example, chinese patent CN201065068Y discloses a rear axle speed reducing mechanism of an electric vehicle, which comprises a driving gear, a primary speed reducing gear, a secondary speed reducing gear, an output shaft, and a speed reducing mechanism housing, wherein the speed reducing mechanism is further provided with a differential, and the differential is composed of four bevel gears and a differential housing and is connected to the output shaft; the speed reducing mechanism driving gear shaft is matched and connected with a spline groove of the motor through a spline arranged on the speed reducing mechanism driving gear shaft, and meanwhile, the speed reducing mechanism shell is fixedly connected with the motor and is suitable for being used as a speed reducing device of a rear axle of an electric automobile.
This structure is second grade speed reduction electric drive axle, can realize big velocity ratio deceleration, but this structure still has some not enoughly, the differential mechanism of this structure comprises four bevel gears and differential mechanism shell, it adopts traditional bevel gear differential mechanism, though simple structure, it is steady and reliable to work, but because the characteristic of motor drive axle differential mechanism lug connection motor high speed output end, under high rotational speed, meshing of straight-tooth bevel gear differential mechanism sun gear and planet wheel, the cooperation of sun gear and output shaft, the cooperation of sun gear and casing, the influence that the cooperation error of planet wheel and casing caused will all be enlargied, cause the wearing and tearing of gear, the wearing and tearing of shaft hole fitting surface, the increase of noise, the shortening of life-span. To meet the performance requirements, higher requirements are necessarily required on the manufacturing and mounting precision of the differential, so that the manufacturing cost of the differential is increased.
In addition, the integration level of the structure is not high, the motor shell, the differential shell and the speed reducer shell are mutually independent, the motor shell, the differential shell and the speed reducer shell are still required to be installed and connected, the structure is complex, the size of a drive axle is large, the requirement on matching space of the drive axle and the whole vehicle is large, and the adaptability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides an integrated form second grade speed reduction electric drive axle, the integrated level is high, and whole car suitability is good, adopts cylindrical gear differential mechanism to guarantee even meshing of gear and steady power take off under the high rotational speed, and is shorter at axial dimensions, and the structure is compacter.
The technical scheme as follows:
an integrated two-stage reduction electric drive axle comprises an integrated shell, wherein a motor, a two-stage parallel reduction gear set and a differential mechanism which are sequentially connected in a transmission manner are arranged in the integrated shell, the integrated shell is of an integrally formed structure, the differential mechanism is constructed into a cylindrical gear differential mechanism, planetary gears and sun gears of the cylindrical gear differential mechanism are respectively divided into two groups, the sun gears are half shaft gears, the half shaft gears are connected with half shafts, and the planetary gears and the half shaft gears are cylindrical gear structures; still including bearing the frame, semi-axis and wheel, the semi-axis sets up bear the frame outside, the semi-axis one end with differential mechanism's output is connected and the other end is connected the wheel, second grade parallel reduction gear group include with the motor output shaft coaxial coupling's of motor one-level action wheel, with the one-level follower that the one-level action wheel meshing is connected, with one-level follower coaxial coupling's second grade action wheel, with the second grade follower that the second grade action wheel meshing is connected, the second grade follower with differential mechanism's shell is connected. The utility model discloses with the motor casing, differential mechanism shell and the integrated integrative setting of speed reducer shell, the system integrated level is high, and occupation space is little, does not need the transmission shaft, and the battery package can be arranged in the middle of the vehicle girder, and is good with the suitability of whole car, and assembly process is simple.
In addition, the utility model adopts the cylindrical gear differential mechanism and two sets of cylindrical gear planetary gear sets, thereby satisfying the characteristic of high speed output of the differential mechanism, having stable power output, low noise, longer service life, shorter axial dimension than the traditional bevel gear differential mechanism and compact structure; adopt non-axle mounting means, differential mechanism and semi-axis do not all set up in bearing the frame, are convenient for assemble and later maintenance dismantlement, and the axle design is simple.
Preferably, the axes of the motor output shaft, the secondary driving wheel and the half shaft are arranged in parallel, so that the structure is simple and the realization is easy.
Preferably, the integrated shell and the bearing frame are designed in a split mode, so that assembly and later maintenance disassembly are facilitated, and the axle is simple in design.
Preferably, the two ends of the bearing frame extend in the same direction to form a U-shaped bent structure, so that the installation space of the speed reducer can be avoided more, and the bearing capacity of the axle can be greatly improved by the integral bent bearing frame.
The utility model has the advantages that:
1. the utility model discloses with the motor casing, differential mechanism shell and the integrated integrative setting of speed reducer shell, the system integrated level is high, and occupation space is little, does not need the transmission shaft, and the battery package can be arranged in the middle of the vehicle girder, and is good with the suitability of whole car, and assembly process is simple.
2. The differential mechanism with two sets of cylindrical gear planetary gear sets is adopted, the characteristic of high-speed output of the differential mechanism is met, power output is stable, noise is low, the service life is longer, the axial size of the differential mechanism is shorter than that of a traditional bevel gear differential mechanism, and the differential mechanism is compact in structure.
3. Adopt non-axle installation, adopt non-axle mounting means, differential mechanism and semi-axis do not all set up in bearing the frame, are convenient for assemble and later maintenance dismantlement, and the axle design is simple.
Drawings
Fig. 1 is a schematic structural diagram of an integrated two-stage deceleration electric drive axle according to the present invention.
Fig. 2 is a schematic view of a non-axle mounting structure of an integrated two-stage deceleration electric drive axle according to the present invention.
In the figure: 1-integrated shell, 101-motor shell, 102-speed reducer shell, 103-differential shell, 2-motor, 201-motor output shaft, 3-secondary parallel reduction gear set, 301-primary driving wheel, 302-primary driven wheel, 303-secondary driving wheel, 304-secondary driven wheel, 4-differential, 401-planetary gear, 402-half shaft gear, 5-bearing frame, 6-half shaft and 7-wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
an integrated two-stage reduction electric drive axle comprises an integrated shell 1, wherein a motor 2, a two-stage parallel reduction gear set 3 and a differential mechanism 4 which are sequentially connected in a transmission manner are arranged in the integrated shell 1, the integrated shell 1 is of an integrally formed structure, and the differential mechanism 4 is constructed as a cylindrical gear differential mechanism; still including bearing frame 5, semi-axis 6 and wheel 7, semi-axis 6 sets up bear 5 outsides, semi-axis 6 one end with output of differential mechanism 4 is connected and the other end is connected wheel 7, second grade parallel reduction gear group 3 include with motor 2's motor output shaft 201 coaxial coupling's one-level action wheel 301, with one-level driven wheel 302 that one-level action wheel 301 meshing is connected, with one-level driven wheel 302 coaxial coupling's second grade action wheel 303, with second grade driven wheel 304 that second grade action wheel 303 meshing is connected, second grade driven wheel 304 with differential mechanism 4's shell is connected.
The working principle of the embodiment is as follows:
power transmission path: the power output by the motor 2 is transmitted to wheels 7 on the left side and the right side through a differential 4 by speed reduction and torque increase of a secondary parallel reduction gear set 3.
Example 2:
as shown in fig. 1 and fig. 2, an integrated two-stage reduction electric drive axle comprises an integrated housing 1, wherein a motor 2, a two-stage parallel reduction gear set 3 and a differential 4 which are sequentially connected in a transmission manner are arranged in the integrated housing 1, the integrated housing 1 is an integrally formed structure, and the integrated housing 1 integrates a motor casing 101, a reducer casing 102 and a differential casing 103;
as shown in fig. 1, the differential 4 is configured as a cylindrical gear differential, and mainly comprises a housing, planet gears, a side gear 402, and the like, wherein the planet gears 401 and the side gear 402 of the cylindrical gear differential are both provided in two sets, and the planet gears 401 and the side gear 402 are both in a cylindrical gear structure; the defects that the traditional bevel gear differential mechanism is complex in part processing, high in cost, large in axial force during working and easy to wear parts in manufacturing are overcome.
The utility model discloses still including bearing frame 5, semi-axis 6 and wheel 7, semi-axis 6 sets up bear 5 outsides, bear the corresponding position department that bears 5 both ends connection wheel 7, semi-axis 6 one end with differential mechanism 4's output is connected and the other end is connected wheel 7, second grade parallel reduction gear group 3 include with motor 2's motor output shaft 201 coaxial coupling's one-level action wheel 301, with one-level action wheel 301 meshes the one-level follower 302 of connecting, with one-level follower 302 coaxial coupling's second grade action wheel 303, with second grade follower 304 that second grade action wheel 303 meshes the connection, second grade follower 304 with differential mechanism 4's shell is connected. The utility model discloses with motor casing 101, differential mechanism shell 103 and the integrated integrative setting of speed reducer shell 102, the system integrated level is high, and occupation space is little, does not need the transmission shaft, and the battery package can be arranged in the middle of the vehicle girder, and is good with the suitability of whole car, assembly process is simple.
The axes of the motor output shaft 201, the secondary driving wheel 303 and the half shaft 6 are arranged in parallel, so that the structure is simple and the realization is easy.
The integrated shell 1 and the bearing frame 5 are designed in a split mode, so that assembly and later maintenance disassembly are facilitated, and the axle is simple in design.
As shown in fig. 2, the two ends of the bearing frame 5 extend in the same direction to form a U-shaped bent structure, so that the installation space of the speed reducer can be saved greatly, and the bearing capacity of the axle can be greatly improved by the integral bent bearing frame 5.
Claims (4)
1. An integrated form two-stage speed reduction electric drive axle which characterized in that: the gear type differential gear comprises an integrated shell (1), wherein a motor (2), a secondary parallel reduction gear set (3) and a differential mechanism (4) which are sequentially connected in a transmission manner are arranged in the integrated shell (1), the integrated shell (1) is of an integrally formed structure, and the differential mechanism (4) is constructed into a cylindrical gear differential mechanism; still including bearing frame (5), semi-axis (6) and wheel (7), semi-axis (6) set up bear frame (5) outside, the one end of semi-axis (6) with the output of differential mechanism (4) is connected and the other end is connected wheel (7), second grade parallel reduction gear group (3) include with motor output shaft (201) coaxial coupling's of motor (2) one-level action wheel (301), with one-level driven wheel (302) that one-level action wheel (301) meshing is connected, with one-level driven wheel (302) coaxial coupling's second grade action wheel (303), with second grade driven wheel (304) that second grade action wheel (303) meshing is connected, second grade driven wheel (304) with the casing of differential mechanism (4) is connected.
2. An integrated two-stage retarding electric drive axle according to claim 1, wherein: the axes of the motor output shaft (201), the secondary driving wheel (303) and the half shaft (6) are arranged in parallel.
3. An integrated two-stage decelerating electric drive axle according to claim 1 or 2, wherein: the integrated shell (1) and the bearing frame (5) are designed in a split manner.
4. An integrated two-stage decelerating electric drive axle according to claim 1 or 2, wherein: two ends of the bearing frame (5) extend towards the same direction to form a U-shaped bent structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020687296.XU CN212332293U (en) | 2020-04-29 | 2020-04-29 | Integrated form second grade speed reduction electric drive axle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020687296.XU CN212332293U (en) | 2020-04-29 | 2020-04-29 | Integrated form second grade speed reduction electric drive axle |
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| CN212332293U true CN212332293U (en) | 2021-01-12 |
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| CN202020687296.XU Active CN212332293U (en) | 2020-04-29 | 2020-04-29 | Integrated form second grade speed reduction electric drive axle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771227A (en) * | 2022-05-13 | 2022-07-22 | 中国第一汽车股份有限公司 | Coaxial electric drive system and vehicle |
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2020
- 2020-04-29 CN CN202020687296.XU patent/CN212332293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771227A (en) * | 2022-05-13 | 2022-07-22 | 中国第一汽车股份有限公司 | Coaxial electric drive system and vehicle |
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Effective date of registration: 20220916 Address after: No. 9, Keyuan East 11th Road, High-tech Zone, Nanning City, Guangxi Zhuang Autonomous Region, 530009 Patentee after: Yuchaixinlan New Energy Power Technology Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |