CN113890258B - Motor assembly of electric drive axle and electric drive axle - Google Patents
Motor assembly of electric drive axle and electric drive axle Download PDFInfo
- Publication number
- CN113890258B CN113890258B CN202111173250.1A CN202111173250A CN113890258B CN 113890258 B CN113890258 B CN 113890258B CN 202111173250 A CN202111173250 A CN 202111173250A CN 113890258 B CN113890258 B CN 113890258B
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- Prior art keywords
- oil seal
- half shaft
- motor
- mounting hole
- electric drive
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Details Of Gearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a motor assembly of an electric drive axle and the electric drive axle, wherein the motor assembly comprises a drive motor and a bearing oil seal assembly; the bearing oil seal assembly comprises a mounting seat provided with a mounting hole, and a motor oil seal, a middle bearing of a long half shaft and a first half shaft oil seal of the long half shaft which are sequentially arranged in the mounting hole along the front and rear directions; the driving motor comprises an end cover and a rotary transformer, wherein the end cover is provided with a mounting hole, and the rotary transformer and the bearing oil seal assembly are sequentially mounted in the mounting hole along the front and rear directions. The motor oil seal, the intermediate bearing and the first half shaft oil seal are assembled on the mounting seat as a whole and are arranged in the mounting hole of the end cover together with the rotary transformer, so that when the rotary transformer is zeroed, the operation of zeroing or other maintenance and the like can be performed before the assembly of the bearing oil seal assembly or after the assembly, and the bearing oil seal assembly can be detached from the end cover without obstructing the operation of the rotary transformer.
Description
Technical Field
The invention relates to the technical field of drive axles, in particular to a motor assembly of an electric drive axle and the electric drive axle.
Background
Referring to fig. 1, fig. 1 is an enlarged view of the position of a drive motor and differential assembly in an electric drive axle.
The motor 03 and the differential 04 on the electric drive axle are positioned on the same axis, so that one half axle needs to pass through the rotor shaft of the motor 03 before reaching the differential 04, and the other half axle is adjacent to the differential 04. Because the motor 03 has a certain length, the half shaft passing through the motor 03 is particularly long, namely a long half shaft 01, and the half shaft on the other side is relatively short, namely a short half shaft 02. This gives rise to certain problems with the rigidity of the longer half shaft 01, whereas the shorter half shaft 02 is relatively rigid due to its shorter length.
As shown in fig. 1, in order to solve the problem of the swing and poor rigidity caused by the overlong length of the long half shaft 01, an intermediate bearing 05 is generally added in the middle of the long half shaft 01 to restrict the radial movement of the middle position of the long half shaft 01, so as to improve the rigidity of the long half shaft 01 and ensure that the long half shaft 01 works normally to transmit torque, and in fig. 1, the intermediate bearing 05 is arranged in an end cover of the motor 03.
In addition, the gear oil must be injected into the drive axle reducer for lubricating the rotating parts such as gears, bearings, differential and the like, but the half shafts extend out from the interior of the reducer to transmit torque and rotation speed, so that the extending hole positions of the long half shafts 01 or the short half shafts 02 must be sealed in the form of oil seals in order to prevent the gear oil from flowing out. As shown in fig. 1, the oil seal 06 of the long half shaft 01 is generally arranged in the middle of the rod part of the long half shaft 01, the outer ring of the oil seal 06 is fixed on the motor end cover and is positioned beside the intermediate bearing 05; the oil seal of the minor axis 02 is arranged at a position of the minor axis 02 close to a spline connected with the differential 04, and an outer ring of the oil seal is fixed to the reducer housing.
With continued reference to fig. 1, the motor 03 is provided with a resolver 07, which is an electromagnetic sensor for measuring the angular displacement and the angular velocity of a rotating shaft of a rotating object, and is composed of a stator and a rotor, and is required to be disposed at the position of a rotor shaft of the motor. Furthermore, resolver 07 typically needs to be zero adjusted when mounted to motor 03.
Thus, since the intermediate bearing 05 needs to support the long half shaft 01 part outside the rotor shaft of the motor, the intermediate bearing 05 and the oil seal 06 of the long half shaft 01 are necessarily located on the outer side of the rotary transformer 07, and the internal rotary transformer 07 is shielded, so that the electric drive axle of the type cannot be adjusted to a uniform rotation angle when leaving the factory, and thus the controller of the motor 03 can only adopt one-to-one matching, the interchangeability is not achieved, and adverse effects can be caused for mass production and later maintenance.
Disclosure of Invention
The invention provides a motor assembly of an electric drive axle, which comprises a long half shaft and a short half shaft, wherein the motor assembly comprises a drive motor and a bearing oil seal assembly; the bearing oil seal assembly comprises a mounting seat provided with a mounting hole, and a motor oil seal, a middle bearing of a long half shaft and a first half shaft oil seal of the long half shaft which are axially arranged in the mounting hole, wherein the motor oil seal (14) is positioned at the front sides of the middle bearing (13) and the first half shaft oil seal (2);
the driving motor comprises an end cover and a rotary transformer, wherein the end cover is provided with a mounting hole, and the rotary transformer and the bearing oil seal assembly are sequentially mounted in the mounting hole along the front and rear directions.
In a specific embodiment, the hole wall of the mounting hole is provided with a first limiting part and a second limiting part, and the intermediate bearing is mounted between the first limiting part and the second limiting part.
In one specific embodiment, at least one of the first limiting portion and the second limiting portion is a circlip.
In a specific embodiment, the mounting hole comprises a small hole and a large hole which are connected and distributed along the front and the rear, a step between the small hole and the large hole forms the first limit part, and the second limit part is the elastic retainer ring; the first half-shaft oil seal is arranged in the large hole, and the motor oil seal is arranged in the small hole.
In one embodiment, the mounting seat is secured within the mounting hole by a fastener; or, the mounting seat is provided with external threads, the mounting hole is provided with matched internal threads, and the mounting seat is in threaded connection with the mounting hole.
The invention also provides an electric drive axle comprising a major half axle, a minor half axle and a motor assembly as described in any one of the preceding claims.
In a specific embodiment, at least one of the long half shaft and the short half shaft is provided with a bushing, the bushing is sleeved outside and in interference fit with the corresponding long half shaft or short half shaft, and the periphery of the bushing is in dynamic seal fit with the inner hole of the corresponding first half shaft oil seal or the second half shaft oil seal of the short half shaft.
In one embodiment, the long half shaft or the short half shaft forms a shaft neck and a shaft shoulder, the shaft neck is sleeved with the bushing, the shaft shoulder is used for limiting the corresponding bushing, and the shaft shoulder is located behind the shaft neck.
In one embodiment, the intermediate bearing is an interference fit or a small clearance fit with the journal.
In one embodiment, the bushing is a steel collar.
In this scheme, with motor oil blanket, intermediate bearing and first half axle oil blanket all assemble as an holistic bearing oil blanket subassembly on the mount pad, and set up simultaneously in the second mounting hole of end cover with the resolver, like this, when needs zeroing the resolver, can go on before bearing oil blanket subassembly assembly, perhaps, if need carry out operations such as zeroing or other maintenance to the resolver after the assembly, also can dismantle bearing oil blanket subassembly from the end cover, can not hinder the operation to the resolver.
Drawings
FIG. 1 is an enlarged view of the position of a drive motor and differential assembly in an electric drive axle;
FIG. 2 is a schematic diagram of an electric drive axle according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;
fig. 4 is an enlarged schematic view of the portion B in fig. 2.
The reference numerals are explained as follows:
01-long half shaft; 02-short half shaft; 03-an electric motor; 04-differential; 05-an intermediate bearing; 06-oil seal; 07-a resolver;
1-a bearing oil seal assembly;
11-a mounting base; 11 a-steps; 12-a first half-shaft oil seal; 13-an intermediate bearing; 14-motor oil seal; 15-elastic check rings;
21-a long half shaft; 21 a-a first shoulder; 21 b-a first journal; 21 c-a first spline;
22-short half shaft; 22 a-a second shoulder; 22 b-a second journal; 22 c-a second spline;
3-driving a motor;
31-end caps; 31 a-a second mounting hole; 32-rotor shaft;
41-a first bushing; 42-a second bushing;
5-rotary transformer
6-differential mechanism;
7-a second half shaft oil seal.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 2, fig. 2 is a schematic diagram of an electric drive axle according to an embodiment of the invention.
The embodiment provides an electric drive axle and motor assembly thereof, the electric drive axle comprises a drive motor 3 and a differential mechanism 6 which are coaxially arranged, and as the drive motor 3 and the differential mechanism 6 are coaxially arranged, two half shafts of the electric drive axle are a long half shaft 21 and a short half shaft 22 respectively, the long half shaft 21 passes through a rotor shaft 32 of the drive motor 3 to be connected with the differential mechanism 6, and the short half shaft 22 and the differential mechanism 6 are adjacently arranged.
With continued reference to fig. 3, fig. 3 is an enlarged schematic view of the portion a in fig. 2.
The motor assembly in this scheme includes driving motor 3 and bearing oil blanket subassembly 1, and bearing oil blanket subassembly 1 is including the mount pad 11 that is equipped with first mounting hole to and along the intermediate bearing 13 of axial arrangement in first mounting hole motor oil blanket 14, long semi-axis 21, the semi-axis oil blanket of long semi-axis 21, and the semi-axis oil blanket of this text definition long semi-axis 21 is first semi-axis oil blanket 12. The motor oil seal 14, the intermediate bearing 13, and the first half-shaft oil seal 12 are sequentially distributed along the front and rear directions, in fig. 3, the motor oil seal 14 is located at the forefront side, the intermediate bearing 13 is located between the first half-shaft oil seal 12 and the motor oil seal 14, and of course, the first half-shaft oil seal 12 may also be located between the intermediate bearing 13 and the motor oil seal 14. The first half shaft oil seal 12 is used for sealing oil leakage, and the motor oil seal 14 prevents oil from flowing into the driving motor 3.
The terms "front" and "rear" are used herein with reference to the connecting end of the corresponding axle shaft to the differential 6, and the adjacent connecting end is "front" and vice versa. With the view of fig. 2, the portion of the major half shaft 21 is shown as being right forward, left rearward, the portion of the minor half shaft 22 is shown as being left forward, right rearward, and may be understood as being a differential 6 as referenced, and the portion adjacent to the differential 6 is shown as being front, and vice versa. In fig. 3, the motor oil seal 14, the intermediate bearing 13, and the first half shaft oil seal 12 are distributed from right to left.
As shown in fig. 3, the driving motor 3 includes an end cover 31 and a rotary transformer 5, the bearing oil seal assembly 1 is designed for the long half shaft 21, the end cover 31 is also an end cover corresponding to one side of the long half shaft 21 on the driving motor 3, the end cover 31 is provided with a second mounting hole 31a, the rotary transformer 5 and the bearing oil seal assembly 1 are sequentially mounted in the second mounting hole 31a along the front and rear directions, and the hole wall of the second mounting hole 31a can be provided with steps to separate the bearing oil seal assembly 1 and the rotary transformer 5.
It should be noted that, the motor oil seal 14 needs to be matched with the rotor shaft 32, and the intermediate bearing 13 of the long half shaft 21 and the first half shaft oil seal 12 need to be matched with the long half shaft 21, so that they are both in annular structures, and accordingly, the axis of the first mounting hole of the mounting seat 11 of the bearing oil seal assembly 1 is parallel to the long half shaft 21 and the rotor shaft 32, and is preferably coaxially arranged, so that the stress is uniform, and similarly, the second mounting hole 31a formed in the end cover 31 is also preferably coaxially arranged with the first mounting hole.
So configured, referring to fig. 3, in this embodiment, the motor oil seal 14, the intermediate bearing 13 and the first half shaft oil seal 12 are assembled to the mounting seat 11 as a whole bearing oil seal assembly 1, and are disposed in the second mounting hole 31a of the end cover 31 simultaneously with the rotary transformer 5, so that when the rotary transformer 5 needs to be zeroed, the operation can be performed before the assembly of the bearing oil seal assembly 1, or, if the operation of zeroing or other maintenance is required after the assembly of the rotary transformer 5, the bearing oil seal assembly 1 can be detached from the end cover 31, so that the operation of the rotary transformer 5 is not hindered. In order to implement the operation of the resolver 5, it is obvious that, in the second mounting hole 31a, the rear-to-front operation tool or the hand of the operator may enter the position where the resolver 5 is located, so as to perform the zeroing or other operations on the resolver 5, but the specific size and structural design of the second mounting hole 31a are not further limited, and the second mounting hole 31a may be tapered or of an equal diameter from the rear to the front.
In this scheme, the bearing oil seal assembly 1 is detachably assembled in the second mounting hole 31a, so as to facilitate disassembly, the mounting seat 11 may be fixed in the second mounting hole 31a of the end cover 31 by a fastener, for example, a bolt, and the mounting seat 11 and the end cover 31 are provided with corresponding screw holes. Alternatively, an external thread may be provided on the outer periphery of the mounting seat 11, and the hole wall of the second mounting hole 31a forms a matched internal thread, so that the mounting seat 11 is in threaded connection with the second mounting hole 31a, and at this time, the bearing oil seal assembly 1 may be directly screwed into the second mounting hole 31a of the end cover 31, so that the assembly and disassembly are very simple.
Please continue to refer to fig. 3, the hole wall of the first mounting hole of the mounting seat 11 is provided with a first limiting portion and a second limiting portion, specifically in this embodiment, the second limiting portion is a circlip 15, the first limiting portion is formed by a step 11a formed by the hole wall of the first mounting hole, at this time, the intermediate bearing 13 is mounted between the first limiting portion and the second limiting portion, so as to be axially limited, so that the mounting position is relatively stable, and the motor oil seal 14 and the first half-shaft oil seal 12 are isolated from each other. As shown in fig. 3, the first mounting hole is a stepped hole, including a small hole and a large hole which are connected and distributed along the front and rear directions, the step 11a is formed between the small hole and the large hole, the first half-shaft oil seal 12 can be mounted on the large hole, the motor oil seal 14 is mounted on the small hole, and the outer peripheral diameter of the motor oil seal 14 is smaller than that of the first half-shaft oil seal 12, which can be understood that the first mounting hole is not limited to be a stepped hole, such as an annular partition plate with an inward extending hole wall, according to the structural size design of the first half-shaft oil seal 12, the motor oil seal 14 and the intermediate bearing 13. In practice, both limit portions may also be circlips 15, where one limit portion is formed by a step 11a, which both meets the installation size requirements of the motor oil seal 14 and the intermediate bearing 13 and acts as a relatively rigid isolation stop. The second limiting part adopts the circlip 15, which is beneficial to realizing that the intermediate bearing 13 is arranged between the first limiting part and the second limiting part.
Referring again to fig. 2 and 3, and as will be appreciated in conjunction with fig. 4, fig. 4 is an enlarged schematic view of the portion B of fig. 2.
The long half shaft 21 and the short half shaft 22 in this embodiment are respectively provided with a bushing, which is respectively defined as a first bushing 41 and a second bushing 42, wherein the first bushing 41 is sleeved with the corresponding long half shaft 21 in an interference fit manner, the second bushing 42 is sleeved with the corresponding short half shaft 22 in an interference fit manner, the outer periphery of the first bushing 41 is in dynamic seal fit with the inner hole of the first half shaft oil seal 12, and the outer periphery of the second bushing 42 is in dynamic seal fit with the inner hole of the second half shaft oil seal 7, and the bushing can be a steel ring sleeve or a sleeve-shaped structure made of other rigid materials.
With the cooperation of the first bushing 41 and the long half shaft 21 being described, as shown in fig. 3, the first bushing 41 and the long half shaft 21 are in interference fit, and the inner hole of the first shaft oil seal 12 is not required to match with the outer diameter of the long half shaft 21 by moving seal fit of the first bushing 41 and the inner hole of the first shaft oil seal 12, and the inner hole of the first shaft oil seal 12 can be larger than the outer diameter of the long half shaft 21 by approximately the thickness of the first bushing 41, that is, compared with the background art, the inner hole aperture of the first shaft oil seal 12 is enlarged, so that when the first shaft oil seal 12 and the long half shaft 21 are assembled, the connecting end of the long half shaft 21 is not easy to contact with and squeeze the lip of the first shaft oil seal 12 to damage the lip, and the connecting end of the long half shaft 21 is generally provided with a spline for connecting with the differential mechanism 6, which is defined as a first spline 21c. The connecting end of the minor axis 22 is also provided with a spline for connecting with a differential, which is defined as a second spline 22c, and the second bushing 42 and the minor axis 22 are matched in the same principle, which is equivalent to expanding the aperture of the second axis oil seal 7, so as to avoid or reduce the damage of the second spline 22c at the connecting end of the minor axis 22 to the lip of the second axis oil seal 7.
With continued reference to fig. 3, the axle body of the axle shaft 21 has a first journal 21b and a first shoulder 21a formed thereon, the first shoulder 21a being located behind the first journal 21 b. The first bushing 41 and the intermediate bearing 13 are both sleeved on the first journal 21b, and the intermediate bearing 13 and the first journal 21b can be in interference fit or small clearance fit so as to ensure stable position and smooth transmission of the intermediate bearing 13. The first shoulder 21a serves to axially limit the first bush 41 rearward to limit the rearward axial movement of the first bush 41 when the first bush 41 is press-fitted, and the circlip 15 does not come into contact with the first bush 41. As shown in fig. 3, the portion of the long half shaft 21 before the first journal 21b needs to pass through the inner hole of the rotor shaft 32 of the drive motor 3, and the radial dimension is designed to be slightly smaller than the dimension of the first journal 21b so as to be inserted into the rotor shaft 32. As shown in fig. 4, the axle stub shaft 22 is also configured such that a second axle journal 22b and a second axle shoulder 22a are also formed on the axle body of the axle stub shaft 22, the second axle shoulder 22a to limit rearward axial movement of the second bushing 42 when the second bushing 42 is press-fitted.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (7)
1. An electric drive axle motor assembly comprising a long half shaft and a short half shaft, characterized in that the motor assembly comprises a drive motor (3) and a bearing oil seal assembly (1); the bearing oil seal assembly (1) comprises a mounting seat (11) provided with a mounting hole, and a motor oil seal (14), an intermediate bearing (13) of a long half shaft (21) and a first half shaft oil seal (12) of the long half shaft (21) which are axially arranged in the mounting hole of the mounting seat (11), wherein the motor oil seal (14) is positioned on the front side of the intermediate bearing (13) and the first half shaft oil seal (12);
the driving motor (3) comprises an end cover (31) and a rotary transformer (5), wherein the end cover (31) is provided with a mounting hole, and the rotary transformer (5) and the bearing oil seal assembly (1) are sequentially mounted in the mounting hole of the end cover (31) along the front and rear directions;
the hole wall of the mounting hole of the mounting seat (11) is provided with a first limit part and a second limit part, and the intermediate bearing (13) is mounted between the first limit part and the second limit part;
at least one of the first limiting part and the second limiting part is a circlip (15);
the mounting hole of the mounting seat (11) comprises small holes and large holes which are connected and distributed along the front and the rear, a step (11 a) between the small holes and the large holes forms a first limiting part, and the second limiting part is the elastic retainer ring (15); the first half-shaft oil seal (12) and the intermediate bearing (13) are arranged in the large hole, and the motor oil seal (14) is arranged in the small hole.
2. An electric drive axle motor assembly according to claim 1, wherein the mounting base (11) is secured within the mounting aperture of the end cap by fasteners; or the mounting seat is provided with external threads, the mounting hole of the end cover is provided with matched internal threads, and the mounting seat (11) is in threaded connection with the mounting hole of the end cover.
3. An electric drive axle, characterized by comprising a long half axle (21), a short half axle (22) and a motor assembly according to any of claims 1-2.
4. An electric drive axle according to claim 3, characterized in that at least one of the long half shaft (21) and the short half shaft (22) is provided with a bushing, which is sleeved and interference fitted with the corresponding long half shaft (21) or short half shaft (22), the outer circumference of which bushing is in dynamic sealing engagement with the inner bore of the corresponding first half shaft oil seal (12) or second half shaft oil seal (7) of the short half shaft (22).
5. An electric drive axle according to claim 4, characterized in that the long half shaft (21) or the short half shaft (22) forms a journal and a shoulder, the bushing housing the journal, the shoulder being intended to limit the corresponding bushing, the shoulder being located behind the journal.
6. An electric drive axle according to claim 5, characterized in that the intermediate bearing (13) is an interference fit or a small clearance fit with the journal.
7. The electric drive axle of claim 5, wherein the bushing is a steel collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111173250.1A CN113890258B (en) | 2021-10-08 | 2021-10-08 | Motor assembly of electric drive axle and electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111173250.1A CN113890258B (en) | 2021-10-08 | 2021-10-08 | Motor assembly of electric drive axle and electric drive axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113890258A CN113890258A (en) | 2022-01-04 |
| CN113890258B true CN113890258B (en) | 2023-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111173250.1A Active CN113890258B (en) | 2021-10-08 | 2021-10-08 | Motor assembly of electric drive axle and electric drive axle |
Country Status (1)
| Country | Link |
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| CN (1) | CN113890258B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290883A (en) * | 2022-01-10 | 2022-04-08 | 广西汽车集团有限公司 | Novel electromechanical integrated electric drive axle structure |
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| CN113890258A (en) | 2022-01-04 |
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