CN215601142U - Electric drive assembly and car - Google Patents
Electric drive assembly and car Download PDFInfo
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- CN215601142U CN215601142U CN202120691791.2U CN202120691791U CN215601142U CN 215601142 U CN215601142 U CN 215601142U CN 202120691791 U CN202120691791 U CN 202120691791U CN 215601142 U CN215601142 U CN 215601142U
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- electric drive
- drive assembly
- water jacket
- shell
- noise
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Abstract
The utility model provides an electric drive assembly and an automobile, and relates to the technical field of electric drive assemblies. The electric drive assembly includes an electric drive assembly housing; a water jacket nested within the electric drive assembly housing; wherein, transition fit is adopted between the water jacket and the electric drive assembly shell. According to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the noise, vibration and sound vibration roughness performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Description
Technical Field
The utility model relates to the technical field of electric drive assemblies, in particular to an electric drive assembly and an automobile.
Background
At present, an integrated shell and a water jacket of an electric drive assembly adopt the industry of hot jacket interference, so that the production efficiency is low, the electric drive assembly is not detachable, and the maintainability is poor. Different with solitary motor casing, integrated casing is great among the electric drive assembly of integration, can't adopt friction stir welding to weld, for producing line convenient assembling, the water jacket generally adopts clearance fit with integrated casing. In the working process of the electric drive assembly, due to the existence of a gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited, and larger noise is generated. For example, in a pure electric vehicle, because the shape of a cylinder of a motor stator is fixed, a specific elliptical mode and a breathing mode cannot be changed, when electromagnetic excitation and the above modes coincide, a shell of the whole electric drive assembly radiates large noise, and the radiation noise seriously affects the comfort of the whole vehicle.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an electric drive assembly and an automobile, which are used for solving the problem that in the working process of the electric drive assembly in the prior art, due to the existence of a gap between a water jacket and an integrated shell, the elliptical mode and the breathing mode of a motor shell are easily excited, and larger noise is generated.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an electric drive assembly comprising:
an electric drive assembly housing;
a water jacket nested within the electric drive assembly housing;
wherein, transition fit is adopted between the water jacket and the electric drive assembly shell.
Further, when the water jacket and the electric drive assembly shell are in a first temperature range, the water jacket and the electric drive assembly shell are in interference fit.
Further, when the water jacket and the electric drive assembly housing are in a second temperature range, the water jacket and the electric drive assembly housing are in clearance fit;
wherein the temperature of the first temperature interval is higher than the temperature of the second temperature interval.
Further, the water jacket comprises at least one water channel, the cooling liquid flows in from a water inlet of the water jacket, and flows out from a water outlet of the water jacket.
Further, the electric drive assembly further comprises:
at least two O-shaped rings arranged at the water inlet of the water jacket and at least two O-shaped rings arranged at the water outlet of the water jacket.
Further, the electric drive assembly further comprises:
and the stator core is nested in the water jacket.
Further, the electric drive assembly further comprises:
a rotor core nested within the stator core.
Further, the electric drive assembly further comprises:
the motor shaft is nested in the rotor iron core, and the rotor iron core is fixed on the motor shaft.
Further, the water jacket includes a straight type water jacket and a spiral type water jacket.
Embodiments of the present invention also provide an automobile including the electric drive assembly as described above.
The utility model has the beneficial effects that:
according to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the Noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Drawings
FIG. 1 shows a schematic diagram of an electric drive assembly according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides an electric drive assembly and an automobile, aiming at the problem that in the working process of the electric drive assembly in the prior art, due to the existence of a gap between a water jacket and an integrated shell, the elliptical mode and the breathing mode of a motor shell are easily excited to generate larger noise.
As shown in fig. 1, an electric drive assembly according to an embodiment of the present invention includes:
an electric drive assembly housing 1;
the water jacket 2 is nested in the electric drive assembly shell 1;
wherein, transition fit is adopted between the water jacket 2 and the electric drive assembly shell 1.
According to the electric drive assembly provided by the embodiment of the utility model, the fit relation between the water jacket of the traditional electric drive assembly and the electric drive assembly shell is changed from clearance fit to transition fit, so that the phenomenon that the elliptical mode and the breathing mode of the electric drive assembly shell are easily excited due to the existence of a clearance in the electric drive longitudinal and transverse working processes, higher noise is caused, and particularly, the noise generated when the electric drive assembly shell works in a low-temperature environment is reduced.
The electric drive assembly provided by the embodiment of the utility model has a simple process, and improves the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures without increasing the cost.
Optionally, when the water jacket 2 and the electric drive assembly housing 1 are in a first temperature range, the water jacket 2 and the electric drive assembly housing 1 are in interference fit;
when the water jacket 2 and the electric drive assembly shell 1 are in a second temperature range, the water jacket 2 and the electric drive assembly shell 1 are in clearance fit; wherein the temperature of the first temperature interval is higher than the temperature of the second temperature interval.
In a second temperature range, the water jacket is in clearance fit with the shell of the electric drive assembly, and the electric drive assembly has larger noise when working; along with the increase of the working time of the electric drive assembly, the motor is heated, the gap between the water jacket and the electric drive assembly shell is gradually reduced, when the temperature is increased to a first temperature range, the water jacket and the electric drive assembly shell are in interference fit, and the noise of the electric drive assembly is reduced during working.
According to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the Noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Optionally, the water jacket comprises at least one water channel, and the coolant flows in from a water inlet and flows out from a water outlet of the water jacket.
The cooling effect of the water jacket is adjusted by controlling the flow rate of the cooling liquid in the water jacket. According to the electric drive assembly provided by the embodiment of the utility model, the at least one water jacket is arranged, so that the cooling efficiency of the water jacket is improved, and the stability of the working temperature of the motor is ensured.
Optionally, the electric drive assembly further comprises:
at least two O-rings 3 arranged at the water inlet of the water jacket 2 and at least two O-rings 3 arranged at the water outlet of the water jacket 2.
The O-shaped ring arranged on the water jacket is easy to damage, and the sealing and damping effects of one O-shaped ring are poor; the water inlet and the water outlet of the water jacket are respectively provided with the at least two O-shaped rings, so that the sealing and damping effects are enhanced, the water jacket is sealed, the Noise of the electric drive assembly during working is reduced, and the Noise, Vibration and Harshness (NVH) performances of the shell of the electric drive assembly at various temperatures are optimized.
The electric drive assembly provided by the embodiment of the utility model is simple in process, and can solve the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise; and, the water jacket has a problem of low sealability.
Optionally, the electric drive assembly further comprises:
and the stator core 4 is nested in the water jacket.
According to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the Noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Optionally, the electric drive assembly further comprises:
a rotor core nested within the stator core.
According to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the Noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Optionally, the electric drive assembly further comprises:
the motor shaft 5 is nested in the rotor iron core, and the rotor iron core is fixed on the motor shaft 5; the motor shaft 5 is driven to rotate by the rotation of the rotor core.
According to the electric drive assembly provided by the embodiment of the utility model, the matching relationship between the water jacket and the electric drive assembly shell is set to be in transition fit, so that the Noise generated by the electric drive assembly shell in the low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost.
Optionally, the water jacket includes a straight type water jacket and a spiral type water jacket.
Embodiments of the present invention also provide an automobile including the electric drive assembly as described above.
According to the automobile provided by the embodiment of the utility model, the matching relationship between the water jacket in the electric drive assembly and the electric drive assembly shell is set to be in transition fit, so that the Noise generated when the electric drive assembly shell works in a low-temperature environment is reduced, and the Noise, Vibration and Harshness (NVH) performances of the electric drive assembly shell at various temperatures are improved. The process is simple, and the problem that in the working process of the electric drive assembly in the prior art, due to the existence of the gap between the water jacket and the integrated shell, the elliptical mode and the breathing mode of the shell of the motor are easily excited to generate larger noise can be solved without increasing the cost. While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the following claims.
Claims (10)
1. An electric drive assembly, comprising:
an electric drive assembly housing;
a water jacket nested within the electric drive assembly housing;
wherein, transition fit is adopted between the water jacket and the electric drive assembly shell.
2. The electric drive assembly of claim 1, wherein the water jacket is in an interference fit with the electric drive assembly housing when the water jacket and the electric drive assembly housing are in a first temperature interval.
3. The electric drive assembly of claim 2, wherein there is a clearance fit between the water jacket and the electric drive assembly housing when the water jacket and the electric drive assembly housing are in the second temperature interval;
wherein the temperature of the first temperature interval is higher than the temperature of the second temperature interval.
4. The electric drive assembly of claim 1, wherein the water jacket includes at least one water channel, and wherein the coolant flows in from a water inlet and out from a water outlet of the water jacket.
5. The electric drive assembly of claim 1, further comprising:
at least two O-shaped rings arranged at the water inlet of the water jacket and at least two O-shaped rings arranged at the water outlet of the water jacket.
6. The electric drive assembly of claim 1, further comprising:
and the stator core is nested in the water jacket.
7. The electric drive assembly of claim 6, further comprising:
a rotor core nested within the stator core.
8. The electric drive assembly of claim 7, further comprising:
the motor shaft is nested in the rotor iron core, and the rotor iron core is fixed on the motor shaft.
9. The electric drive assembly of claim 5, wherein the water jacket comprises a straight water jacket and a spiral water jacket.
10. An automobile, characterized in that it comprises an electric drive assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120691791.2U CN215601142U (en) | 2021-04-06 | 2021-04-06 | Electric drive assembly and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120691791.2U CN215601142U (en) | 2021-04-06 | 2021-04-06 | Electric drive assembly and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215601142U true CN215601142U (en) | 2022-01-21 |
Family
ID=79871530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120691791.2U Active CN215601142U (en) | 2021-04-06 | 2021-04-06 | Electric drive assembly and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215601142U (en) |
-
2021
- 2021-04-06 CN CN202120691791.2U patent/CN215601142U/en active Active
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