CN218913658U - Integrated electric drive assembly and electric vehicle - Google Patents
Integrated electric drive assembly and electric vehicle Download PDFInfo
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- CN218913658U CN218913658U CN202221638651.XU CN202221638651U CN218913658U CN 218913658 U CN218913658 U CN 218913658U CN 202221638651 U CN202221638651 U CN 202221638651U CN 218913658 U CN218913658 U CN 218913658U
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model discloses an integrated electric drive assembly, which comprises a motor and a reduction gearbox, wherein the reduction gearbox comprises a front shell and a rear shell which are provided with an input shaft hole, and is characterized in that one side of the front shell, which is away from the rear shell, is provided with an end cover part formed by extending along the radial direction of the input shaft hole, mounting holes matched with the shell of the motor are uniformly distributed in the circumferential direction of the end cover part, and the shell of the motor is mounted on the mounting holes through bolts; the output shaft of the motor passes through the input shaft hole and extends into the reduction gearbox, and a primary gear of the reduction gearbox is arranged on the output shaft of the motor; a dynamic sealing component is arranged between the output shaft of the motor and the input shaft hole. The integrated electric drive assembly and the electric vehicle have the advantages of reasonable structural design, capability of reducing transmission gaps, heating and abrasion, contribution to prolonging the service life of an oil seal and the like.
Description
Technical Field
The utility model relates to the technical field of electric automobiles, in particular to an integrated electric drive assembly and an electric automobile.
Background
In recent years, with the continuous development of electric automobile technology, the integrated design of an electric drive assembly has become a trend in the future. The electric drive assembly generally includes a motor, a reduction gearbox and a controller, wherein the motor and the reduction gearbox are mainly connected through mechanical transmission, in order to further improve the integration level, a front end cover of the motor and a front housing of the reduction gearbox are generally combined into a common housing with an integrated structure, such as an integrated electric drive assembly and an electric automobile disclosed in chinese patent document, which has a publication number CN110011458A, but in the patent document, an output shaft of the motor and an input shaft of the reduction gearbox are still connected through splines, that is, the output shaft of the motor is provided with splines, and the input shaft of the reduction gearbox is provided with corresponding splined holes, as shown in fig. 1 of the patent. Because there is the clearance between the spline connection for the noise is great when starting, simultaneously, spline is concentric can bring abnormal wear, and it is serious to lead to generating heat, can cause the oil blanket overheated and appear leaking the risk of lubricating oil even.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: how to provide a structural design is reasonable, can reduce transmission clearance, reduces and generates heat and wearing and tearing, is favorable to prolonging oil blanket life's integrated electric drive assembly and electric motor car.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the integrated electric drive assembly comprises a motor and a reduction gearbox, wherein the reduction gearbox comprises a front shell and a rear shell which are provided with an input shaft hole, and the integrated electric drive assembly is characterized in that one side of the front shell, which is away from the rear shell, is provided with an end cover part formed by extending along the radial direction of the input shaft hole, mounting holes matched with the shell of the motor are uniformly distributed in the circumferential direction of the end cover part, and the shell of the motor is mounted on the mounting holes through bolts; the output shaft of the motor passes through the input shaft hole and extends into the reduction gearbox, and a primary gear of the reduction gearbox is arranged on the output shaft of the motor; a dynamic sealing component is arranged between the output shaft of the motor and the input shaft hole.
By adopting the structure, the end cover part is directly and integrally arranged on the front shell of the reduction gearbox, so that the motor and the reduction gearbox share the end cover, the structure is more compact, and the motor with higher power is arranged in a limited space, thereby being beneficial to integrally improving the power. In addition, the primary gear is directly arranged on the output shaft of the motor, so that spline connection is avoided, a gap of spline transmission is eliminated, impact caused by side gaps during starting and braking is reduced, and starting and stopping noise is reduced. Meanwhile, the concentricity problem of spline transmission is eliminated, severe heating caused by abnormal abrasion is avoided, and even oil is subjected to oil seal overheating and oil leakage, so that the service life is prolonged.
Further, a positioning ring coaxially arranged with the input shaft hole is formed on one side of the end cover part, which is away from the rear housing, in a protruding manner, and the outer diameter of the positioning ring is matched with the inner diameter of the housing of the motor.
Thus, the shell assembly of the motor can be more stable through the positioning ring.
Further, one end of the input shaft hole facing the rear shell is provided with an oil seal mounting hole which is formed by expanding outwards in the radial direction, and the other end of the input shaft hole is provided with a bearing mounting hole which is formed by expanding outwards in the radial direction; the dynamic seal assembly comprises an oil seal arranged in the oil seal mounting hole and a bearing arranged in the bearing mounting hole, and an output shaft of the motor passes through the bearing and the oil seal in a matched mode.
Therefore, the oil seal is arranged on one side of the input shaft hole, which is close to the gearbox, so that lubrication in the gearbox can be ensured, and the oil seal can be replaced conveniently in the later maintenance process.
Further, the output shaft of the motor comprises a main shaft section, a bearing shaft section, an oil seal shaft section and a gear shaft section, wherein the diameter of the main shaft section, the bearing shaft section, the oil seal shaft section and the gear shaft section are sequentially reduced in the direction of the rear shell, the diameter of the bearing shaft section is matched with the inner diameter of the bearing, the diameter of the oil seal shaft section is matched with the inner diameter of the oil seal, a clamp spring groove is formed between the bearing shaft section and the oil seal shaft section, the distance between the clamp spring groove and the main shaft section is matched with the thickness of the bearing, and the inner ring of the bearing is fixed on the bearing shaft section through a clamp spring arranged on the clamp spring groove.
Therefore, the bearing can be mounted on the bearing shaft section through the clamp spring, and then the output shaft of the motor passes through the input shaft hole, so that the motor is more convenient to mount.
Further, the diameter of the gear shaft section is consistent with the inner diameter of the primary gear, and the gear shaft section is provided with a first key groove arranged along the axial direction; the primary gear is provided with a second key groove matched with the first key groove, and the primary gear is mounted on the gear shaft section through keys arranged in the first key groove and the second key groove in a matching mode.
Further, the end part of the gear shaft end is coaxially provided with a thread section with threads, and the maximum radius of the thread section is smaller than the distance from the first key groove to the shaft center; the length of the gear shaft section is smaller than the thickness of the primary gear, and the primary gear is installed on the gear shaft section through a gasket sleeved on the threaded section and a fastening nut connected to the threaded section.
Further, the first key grooves are uniformly distributed in two along the circumferential direction of the gear shaft section.
Further, a positioning table in a ring shape is arranged at the bottom of the bearing mounting hole in a protruding mode, and the positioning table is connected with the inner wall of the bearing mounting hole; the radial width of the positioning table is matched with the thickness of the outer ring of the bearing.
Therefore, the area of the positioning table which is arranged in a protruding mode is smaller, and the plane meeting the flatness requirement can be processed more conveniently, so that the assembly precision is improved.
Further, one side of the end cover part, which is away from the rear shell, is provided with threaded blind holes which are uniformly distributed in the radial direction of the input shaft hole, an annular pressing plate is installed through bolts, the inner diameter of the pressing plate is smaller than the outer diameter of the bearing, the minimum distance between the pressing plate and the positioning table is smaller than the thickness of the bearing, and the bearing is fixed in the bearing installation hole through the pressing plate.
In this way, the bearing is more stably mounted in the bearing mounting hole by the pressing plate.
An electric vehicle comprising an integrated electric drive assembly as described above.
In summary, the integrated electric drive assembly and the electric vehicle have the advantages of reasonable structural design, capability of reducing transmission gaps, heating and abrasion, contribution to prolonging the service life of an oil seal, and the like.
Drawings
Fig. 1 is a schematic structural view of a front housing in the present embodiment.
Fig. 2 is a schematic diagram of the unfolding structure of the present embodiment.
Fig. 3 is a schematic cross-sectional structure of the present embodiment.
Fig. 4 is a schematic structural view of the motor output shaft in the present embodiment.
Detailed Description
The present utility model will be described in further detail with reference to examples.
The specific implementation method comprises the following steps: as shown in fig. 1 to 4, an integrated electric drive assembly comprises a motor 1 and a reduction gearbox 2, wherein the reduction gearbox 2 comprises a front shell 21 and a rear shell (not shown in the figure), wherein the front shell 21 is provided with an input shaft hole 22, one side of the front shell 21, which is away from the rear shell, is provided with an end cover part 23 formed by extending along the radial direction of the input shaft hole 22, the end cover part 23 is provided with a plurality of reinforcing ribs extending along the radial direction, mounting holes matched with the shell of the motor 1 are uniformly distributed on the circumferential direction of the end cover part 23, one side of the end cover part 23, which is away from the rear shell, is protrusively provided with a positioning ring 24 coaxially arranged with the input shaft hole 22, and the outer diameter of the positioning ring 24 is matched with the inner diameter of the shell of the motor 1; the shell of the motor 1 is mounted on the mounting hole through bolts; the output shaft of the motor 1 passes through the input shaft hole 22 and extends into the reduction gearbox 2, and a primary gear 5 of the reduction gearbox 2 is arranged on the output shaft of the motor 1; a dynamic seal assembly 3 is arranged between the output shaft of the motor 1 and the input shaft hole 22.
One end of the input shaft hole 22 facing the rear housing is provided with an oil seal mounting hole formed by expanding outwards in the radial direction, and the other end of the input shaft hole 22 is provided with a bearing mounting hole formed by expanding outwards in the radial direction; the dynamic seal assembly 3 includes an oil seal 31 installed in the oil seal installation hole and a bearing 32 installed in the bearing installation hole, and an output shaft of the motor 1 passes through the bearing 32 and the oil seal 31 in a mating manner.
In this embodiment, as shown in fig. 4, the output shaft of the motor 1 includes a main shaft section 11, a bearing shaft section 12, an oil seal shaft section 13 and a gear shaft section 14, which are sequentially reduced in diameter in the direction toward the rear housing, the diameter of the bearing shaft section 12 is matched with the inner diameter of the bearing 32, the diameter of the oil seal shaft section 13 is matched with the inner diameter of the oil seal 31, a snap spring groove 15 is provided between the bearing shaft section 12 and the oil seal shaft section 13, the distance between the snap spring groove 15 and the main shaft section 11 is matched with the thickness of the bearing 32, and the inner ring of the bearing 32 is fixed on the bearing shaft section 12 by a snap spring mounted on the snap spring groove 15.
The diameter of the gear shaft section 14 is consistent with the inner diameter of the primary gear, and the gear shaft section is provided with a first key groove 16 arranged along the axial direction; the primary gear is provided with a second key groove matched with the first key groove 16, the primary gear is mounted on the gear shaft section 14 through keys arranged in the first key groove 16 and the second key groove in a matching mode, and in the embodiment, the first key grooves 16 are uniformly distributed in two along the circumferential direction of the gear shaft section 14.
The end of the gear shaft end 14 is coaxially provided with a threaded section with threads, and the maximum radius of the threaded section is smaller than the distance from the first key slot 16 to the shaft center; the length of the gear shaft section 14 is smaller than the thickness of the primary gear, and the primary gear is mounted on the gear shaft section 14 through a gasket sleeved on the threaded section and a fastening nut connected to the threaded section.
The bottom of the bearing mounting hole is provided with an annular positioning table in a protruding mode, and the positioning table is connected with the inner wall of the bearing mounting hole; the radial width of the positioning table is matched with the thickness of the outer ring of the bearing 32, a threaded blind hole which is uniformly distributed along the radial direction of the input shaft hole 22 is formed in one side of the end cover part 23, which is away from the rear shell, of the end cover part, an annular pressing plate 4 is installed through bolts, the inner diameter of the pressing plate 4 is smaller than the outer diameter of the bearing 32, the minimum distance between the pressing plate 4 and the positioning table is smaller than the thickness of the bearing 32, and the bearing 32 is fixed in the bearing installation hole through the pressing plate 4.
The end cover part is directly integrally arranged on the front shell of the reduction gearbox, so that the motor and the reduction gearbox share the end cover, the structure is more compact, and the motor with higher power is arranged in a limited space, thereby being beneficial to integrally improving the power. In addition, the primary gear is directly arranged on the output shaft of the motor, so that spline connection is avoided, a gap of spline transmission is eliminated, impact caused by side gaps during starting and braking is reduced, and starting and stopping noise is reduced. Meanwhile, the concentricity problem of spline transmission is eliminated, severe heating caused by abnormal abrasion is avoided, and even oil is subjected to oil seal overheating and oil leakage, so that the service life is prolonged.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The integrated electric drive assembly comprises a motor (1) and a reduction gearbox (2), wherein the reduction gearbox (2) comprises a front shell (21) and a rear shell which are provided with an input shaft hole (22), and the integrated electric drive assembly is characterized in that one side of the front shell (21) facing away from the rear shell is provided with an end cover part (23) formed by extending along the radial direction of the input shaft hole (22), mounting holes matched with the shell of the motor (1) are uniformly distributed in the circumferential direction of the end cover part (23), and the shell of the motor (1) is mounted on the mounting holes through bolts; the output shaft of the motor (1) passes through the input shaft hole (22) and extends into the reduction gearbox (2), and a primary gear of the reduction gearbox (2) is arranged on the output shaft of the motor (1); a dynamic sealing component (3) is arranged between the output shaft of the motor (1) and the input shaft hole (22).
2. An integrated electric drive assembly as claimed in claim 1, characterized in that the end cap part (23) is formed with a positioning ring (24) protruding from the side facing away from the rear housing, which positioning ring (24) is arranged coaxially with the input shaft hole (22), the outer diameter of the positioning ring (24) matching the inner diameter of the housing of the electric motor (1).
3. The integrated electric drive assembly of claim 1 wherein one end of the input shaft bore (22) toward the rear housing has an oil seal mounting bore formed to expand radially outwardly, the other end of the input shaft bore (22) having a bearing mounting bore formed to expand radially outwardly; the dynamic seal assembly (3) comprises an oil seal (31) installed in the oil seal installation hole and a bearing (32) installed in the bearing installation hole, and an output shaft of the motor (1) passes through the bearing (32) and the oil seal (31) in a matched mode.
4. An integrated electric drive assembly as claimed in claim 3, characterized in that the output shaft of the motor (1) comprises a main shaft section (11), a bearing shaft section (12), an oil seal shaft section (13) and a gear shaft section (14) which are arranged in a diameter decreasing manner in sequence in the direction towards the rear housing, the diameter of the bearing shaft section (12) is matched with the inner diameter of the bearing (32), the diameter of the oil seal shaft section (13) is matched with the inner diameter of the oil seal (31), a snap spring groove (15) is arranged between the bearing shaft section (12) and the oil seal shaft section (13), the distance between the snap spring groove (15) and the main shaft section (11) is matched with the thickness of the bearing (32), and the inner ring of the bearing (32) is fixed on the bearing shaft section (12) through a snap spring arranged on the snap spring groove (15).
5. An integrated electric drive assembly as claimed in claim 4, characterized in that the diameter of the gear shaft section (14) corresponds to the inner diameter of the primary gear and has a first key slot (16) arranged axially; the primary gear is provided with a second key groove matched with the first key groove (16), and the primary gear is mounted on the gear shaft section (14) through keys which are arranged in the first key groove (16) and the second key groove in a matching mode.
6. The integrated electric drive assembly according to claim 5, characterized in that the end of the gear shaft section (14) is coaxially provided with a threaded section with a thread, the maximum radius of which is smaller than the distance of the first keyway (16) to the shaft center; the length of the gear shaft section (14) is smaller than the thickness of the primary gear, and the primary gear is mounted on the gear shaft section (14) through a gasket sleeved on the threaded section and a fastening nut connected to the threaded section.
7. The integrated electric drive assembly of claim 5, wherein the first keyways (16) are equally spaced circumferentially about the gear shaft segment (14).
8. An integrated electric drive assembly as claimed in claim 3, wherein the bottom of the bearing mounting hole is provided with a positioning table protruding in a ring shape, the positioning table being connected with the inner wall of the bearing mounting hole; the radial width of the positioning table is matched with the thickness of the outer ring of the bearing (32).
9. The integrated electric drive assembly according to claim 8, characterized in that a side of the end cap portion (23) facing away from the rear housing has threaded blind holes uniformly distributed along a radial direction of the input shaft hole (22), and is provided with annular pressing plates (4) by bolts, an inner diameter of the pressing plates (4) is smaller than an outer diameter of the bearing (32), a minimum distance between the pressing plates (4) and the positioning table is smaller than a thickness of the bearing (32), and the bearing (32) is fixed in the bearing mounting hole by the pressing plates (4).
10. An electric vehicle comprising an integrated electric drive assembly as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221638651.XU CN218913658U (en) | 2022-06-29 | 2022-06-29 | Integrated electric drive assembly and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221638651.XU CN218913658U (en) | 2022-06-29 | 2022-06-29 | Integrated electric drive assembly and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218913658U true CN218913658U (en) | 2023-04-25 |
Family
ID=86017526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221638651.XU Active CN218913658U (en) | 2022-06-29 | 2022-06-29 | Integrated electric drive assembly and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218913658U (en) |
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2022
- 2022-06-29 CN CN202221638651.XU patent/CN218913658U/en active Active
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