CN221305659U - Motor shaft, motor and car - Google Patents
Motor shaft, motor and car Download PDFInfo
- Publication number
- CN221305659U CN221305659U CN202323101893.2U CN202323101893U CN221305659U CN 221305659 U CN221305659 U CN 221305659U CN 202323101893 U CN202323101893 U CN 202323101893U CN 221305659 U CN221305659 U CN 221305659U
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- 238000003466 welding Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000007246 mechanism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The application relates to the technical field of automobiles and discloses a motor shaft, a motor and an automobile, wherein the motor shaft comprises a first shaft section, a second shaft section and a third shaft section which are sequentially arranged along the axial direction; the first shaft section is provided with a first shaft head and a first shaft shoulder, the first shaft head is positioned on the inner side of the second shaft section, and the first shaft shoulder is connected with the first end of the second shaft section; the third shaft section is provided with a second shaft head and a second shaft shoulder, the second shaft head is positioned at the inner side of the second shaft section, the second shaft shoulder is connected with the second end of the second shaft section, and the second end is opposite to the first end; wherein the second shaft segment is further coupled to at least one of the first stub shaft and the second stub shaft. The motor shaft provided by the application can meet the power transmission requirement under the working condition of large torque while ensuring the design requirement of the motor shaft for light weight.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a motor shaft, a motor and an automobile.
Background
In recent years, the new energy automobile industry enters a stage of accelerated development, and along with the continuous improvement of the requirements on the competitiveness of products, the requirements on a driving motor are also higher and higher. The motor is a power source of the hybrid electric new energy automobile and the pure electric new energy automobile, and the motor shaft is an important part of the motor and has the function of transmitting torque.
In the related art, the hollow multi-section motor shaft is generally connected with the multi-section motor shaft through a plurality of groups of pins, so that the transmission requirement of power under the working condition of large torque is difficult to meet.
Disclosure of utility model
In view of the above, the application provides a motor shaft, a motor and an automobile, which can meet the power transmission requirement under the working condition of large torque while ensuring the design requirement of light motor shaft.
Specifically, the method comprises the following technical scheme:
An embodiment of the application provides a motor shaft, which comprises a first shaft section, a second shaft section and a third shaft section which are sequentially arranged along an axial direction;
The first shaft section is provided with a first shaft head and a first shaft shoulder, the first shaft head is positioned on the inner side of the second shaft section, and the first shaft shoulder is connected with the first end of the second shaft section;
The third shaft section is provided with a second shaft head and a second shaft shoulder, the second shaft head is positioned on the inner side of the second shaft section, the second shaft shoulder is connected with a second end of the second shaft section, and the second end is opposite to the first end;
wherein the second shaft segment is further coupled to at least one of the first stub shaft and the second stub shaft.
Optionally, the first and second stub shafts are interference fit with the first and second ends of the second shaft segment, respectively.
Optionally, the first stub shaft has a greater interference with the first end of the second axle segment than the second stub shaft has with the second end of the second axle segment.
Optionally, a first connecting structure is arranged between the first shaft shoulder and the first end of the second shaft section; and/or a second connecting structure is arranged between the second shoulder and the second end of the second shaft section.
Optionally, the first connection structure and the second connection structure are each selected from one of the following:
a cementing structure formed after the adhesive is solidified;
and (3) solidifying the molten welding wire to form a welding structure.
Optionally, the first shaft section is formed with a first cavity in an axial penetrating manner, and at least one first oil outlet is formed in the first shaft section along a radial direction, and the first oil outlet is communicated with the first cavity and the external environment;
The second shaft section is penetrated and formed with a second cavity along the axial direction, and the second cavity is communicated with the first cavity;
The inside of third axle section is formed with the third cavity, the third cavity with the second cavity intercommunication, at least one second oil-out has been seted up along radial to the third axle section, the second oil-out intercommunication third cavity and external environment.
Optionally, the wall thickness of the second shaft section is smaller than the wall thickness of the first shaft section and smaller than the wall thickness of the third shaft section.
Optionally, the first stub shaft has an inner diameter that is smaller than an inner diameter of the second stub shaft.
A second aspect of the present application provides a motor, including the motor shaft described above.
A third aspect of the embodiments of the present application provides an automobile, including the motor shaft described above, or including the motor described above.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
In the motor shaft provided by the embodiment of the application, the first end and the second end of the second shaft section are respectively connected with the first shaft shoulder of the first shaft section and the second shaft shoulder of the third shaft section so as to realize preliminary fixation among the shaft sections; in order to improve the torsion resistance of the motor shaft, at least one of the first shaft head of the first shaft section and the second shaft head of the third shaft section also respectively extends into the inner side of the second shaft section and is connected with the second shaft section. Compared with a multi-section motor shaft connected only by a pin in one connecting mode, the motor shaft provided by the embodiment of the application has better torsion resistance, ensures the design requirement of motor shaft light weight, and can meet the power transmission requirement under the working condition of large torque.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of a motor shaft according to an embodiment of the present application.
Reference numerals:
10. a first shaft section; 11. a first stub shaft; 12. a first shoulder; 13. a first cavity; 14. a first oil outlet;
20. A second shaft section; 21. a second cavity;
30. A third shaft section; 31. a second shaft head; 32. a second shoulder; 33. a third cavity; 34. a second oil outlet;
40. spline grooves.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. In order to make the technical scheme and advantages of the present application more clear, the motor shaft, the motor and the automobile will be described in detail with reference to the accompanying drawings.
In recent years, the new energy automobile industry enters a stage of accelerated development, and the requirements on a driving motor are higher and higher in face of continuous improvement of product competitiveness. The motor is a power source of the hybrid electric new energy automobile and the pure electric new energy automobile, and the motor shaft is an important part of the motor and has the function of transmitting torque.
In the related art, the hollow multi-section motor shaft is generally fixedly connected with the multi-section motor shaft through a plurality of groups of pins, so that the transmission requirement of power under the working condition of high torque is difficult to meet.
In this regard, the embodiment of the present application provides a motor shaft, as shown in fig. 1, which may include a first shaft section 10, a second shaft section 20, and a third shaft section 30 sequentially disposed in an axial direction; the first shaft section 10 is provided with a first shaft head 11 and a first shaft shoulder 12, the first shaft head 11 is positioned on the inner side of the second shaft section 20, and the first shaft shoulder 12 is connected with the first end of the second shaft section 20; the third shaft section 30 has a second shaft head 31 and a second shaft shoulder 32, the second shaft head 31 being located inside the second shaft section 20, the second shaft shoulder 32 being connected to a second end of the second shaft section 20, the second end being opposite to the first end; wherein the second shaft segment 20 is further connected to at least one of the first stub shaft 11 and the second stub shaft 31.
In the motor shaft provided by the embodiment of the application, the first end and the second end of the second shaft section 20 are respectively connected with the first shaft shoulder 12 of the first shaft section 10 and the second shaft shoulder 32 of the third shaft section 30 so as to realize preliminary fixation among the shaft sections; in order to improve the torsional performance of the motor shaft, at least one of the first stub shaft 11 of the first shaft section 10 and the second stub shaft 31 of the third shaft section 30 also extends into the inner sides of both ends of the second shaft section 20, respectively, and is connected to the second shaft section 20. Therefore, compared with a multi-section motor shaft which is connected only by a pin in one connecting mode, the motor shaft provided by the embodiment of the application has better torsion resistance, ensures the design requirement of motor shaft light weight, and can meet the power transmission requirement under the working condition of large torque.
Alternatively, the first shaft section 10 is a main bearing area, and a high-strength alloy tube is adopted, and the high-strength alloy tube can be obtained by heat treatment of high-strength alloy steel (for example, 20 CrMnTi) so as to meet the strength requirement of a motor shaft.
Alternatively, the second shaft section 20 is selected according to the actual requirements of the motor shaft for strength and rigidity, such as an alloy steel pipe manufactured from 40Cr or other alloy structural steel.
Optionally, the third shaft section 30 has a low bearing requirement, and a carbon steel pipe is selected, and the carbon steel pipe can be made of a material such as 45 # steel.
The materials of the first shaft section 10, the second shaft section 20 and the third shaft section 30 can be selected and adjusted as desired by a person skilled in the art.
In some embodiments of the present application, the first stub shaft 11 and the second stub shaft 31 are interference fit with the first and second ends of the second shaft segment 20, respectively.
In order to ensure that the motor shaft has better torsion resistance, the first shaft head 11 and the second shaft head 31 are in interference fit with the second shaft section 20 through the first shaft head 10 and the second shaft section 20, and elastic pressure is generated on the contact surfaces of the first shaft head 11 and the second shaft head 31 and the second shaft section 20, so that two adjacent shaft sections are fastened and connected, other connecting structures are not required to be arranged in the connecting mode, and the connecting structure is simple in structure and strong in bearing capacity.
Optionally, the first stub shaft 11 has a greater interference with the first end of the second shaft segment 20 than the second stub shaft 31 has with the second end of the second shaft segment 20.
Since the first shaft section 10 is the main loaded area, which requires the connection of the drive shaft of the drive mechanism to be driven, the demands on anti-torque performance are higher. Therefore, the interference of the first shaft section 10 and the second shaft section 20 is larger than that of the third shaft section 30 and the second shaft section 20, so that the surface contact fit between the first shaft section 10 and the second shaft section 11 is tighter, the connection strength is also larger, and the torque transmission requirement can be better met.
Alternatively, the interior of the first shaft section 10 may be provided with spline grooves 40, the spline grooves 40 being splined to the drive shaft of the drive mechanism to be driven, the motor shaft outputting torque to the drive shaft of the drive mechanism to be driven through the spline grooves 40 in the first shaft section 10.
Alternatively, the mechanism to be driven may be a new energy automobile, and the shaft to be driven may be an input shaft of a gearbox of the new energy automobile. Of course, the mechanism to be driven can be other electric appliances or other various machines, and the selection and adjustment can be performed by those skilled in the art according to actual requirements.
In some embodiments of the present application, a first connection is provided between the first shoulder 12 and the first end of the second shaft section 20; and/or a second connection structure between the second shoulder 32 and the second end of the second shaft segment 20.
On the basis that the first shaft section 10 and the third shaft section 30 are respectively connected with the second shaft section 20 in an interference manner, in order to further enhance the torsion resistance of the motor shaft, a first connecting mechanism is additionally arranged for reinforcing the torsion resistance of the joint of the first shaft shoulder 12 and the second shaft section 20; the second connecting mechanism is arranged to strengthen the torsion resistance of the joint of the second shaft shoulder 32 and the second shaft section 20, so that the adjacent shaft sections are connected in two connecting modes, and the load requirement of the torque transmission of the motor shaft can be better met.
Optionally, the first connection structure and the second connection structure are each selected from one of the following: a cementing structure formed after the adhesive is solidified; and (3) solidifying the molten welding wire to form a welding structure.
In some embodiments, the first shaft segment 10 and the second shaft segment 20 are interference fit with the second shaft segment 20 through the first stub shaft 11 and the second stub shaft 31, respectively, and the first shoulder 12 and the second shaft segment 20 are connected by a welded structure formed of wire. The first shaft section 10 is connected to the second shaft section 20 by both interference fit and welding, and has better torque performance than a multi-segment motor shaft connected by only one connection.
In other embodiments, the first shaft segment 10 and the second shaft segment 20 are respectively in interference fit with the second shaft segment 20 through the first shaft head 11 and the second shaft head 31, and the first shaft shoulder 12 and the second shaft segment 20 are connected through a glue joint structure formed by glue. The first shaft section 10 is connected to the second shaft section 20 by both an interference fit and a glue joint, which has better torque resistance than a multi-segment motor shaft connected by only one connection.
It should be noted that, the second shoulder 32 of the third shaft section 30 and the second shaft section 20 may also be connected by a welded structure or an adhesive structure, and the specific principle is the same as that of the above embodiment, and will not be repeated here.
In some embodiments of the present application, as shown in fig. 1, a first cavity 13 is formed in the first shaft section 10 in an axial penetrating manner, and at least one first oil outlet 14 is radially formed on the first shaft section 10, and the first oil outlet 14 communicates with the first cavity 13 and the external environment; the second shaft section 20 is formed with a second cavity 21 in an axial penetrating manner, and the second cavity 21 is communicated with the first cavity 13; the third shaft section 30 is internally provided with a third cavity 33, the third cavity 33 is communicated with the second cavity 21, the third shaft section 30 is radially provided with at least one second oil outlet 34, and the second oil outlet 34 is communicated with the third cavity 33 and the external environment.
In the technical development process of the electric drive assembly of the new energy automobile, a drive motor with smaller volume and lighter weight is always the target required by engineers. Compared with a water-cooled motor, the oil-cooled motor has the advantages of high cooling efficiency, good insulating property, small volume and the like.
In the working process of the oil-cooled motor shaft, part of oil enters the hollow shaft of the motor rotor, can be used for cooling the rotor, and part of oil is conveyed into the rotor to lubricate and cool the rotor.
In the motor shaft provided by the embodiment of the application, the first cavity 13, the second cavity 21 and the third cavity 33 are sequentially communicated, oil enters from the opening of one side of the first cavity 13 far away from the second shaft section 20, sequentially flows through the first cavity 13, the second cavity 21 and the third cavity 33, and the first oil outlet 14 and the second oil outlet 34 respectively throw the oil in each cavity into the rotor along with the rotation of the motor shaft, so as to cool the rotor.
In some embodiments, a plurality of first oil outlets 14 are uniformly distributed along the circumferential direction of the first shaft section 10 and are respectively communicated with the first cavity 13 and the external environment; the second oil outlets 34 are uniformly distributed along the circumferential direction of the second shaft section 20 and are respectively communicated with the third chamber and the external environment; the plurality of oil outlets are arranged, so that oil in the cavity can be more uniformly thrown into the rotor, and the rotor is cooled.
In some embodiments of the application, the wall thickness of the second shaft section 20 is less than the wall thickness of the first shaft section 10 and less than the wall thickness of the third shaft section 30.
The oil cooled motor shaft is typically disposed within the rotor and is assembled with the rotor via the second shaft section 20. The outer wall of the second shaft section 20 is abutted with the inner wall of the rotor, and during the working process of the motor shaft, part of oil enters the hollow shaft of the motor rotor, so that the motor rotor can be cooled, and part of oil is conveyed into the rotor to lubricate and cool the rotor.
In order to ensure the cooling performance of the motor shaft, the wall thickness H2 of the second shaft section 20 is thinner than that of the other two shaft sections, and after the oil enters the second cavity 21, the heat of the rotor can be absorbed better through the wall of the second shaft section 20, so that the motor shaft can cool the rotor through the oil.
Wherein the wall thickness H1 of the first shaft section 10 refers to the wall thickness of the pipe section used for manufacturing the first shaft section 10 (excluding the first stub shaft 11 and the first shoulder 11 in fig. 1), and the wall thickness H3 of the third shaft section 30 refers to the wall thickness of the pipe section used for manufacturing the third shaft section 30 (excluding the second stub shaft 31 in fig. 1).
Alternatively, the second shaft section 20 is made of seamless steel tubing.
Optionally, the first stub shaft 11 has an inner diameter that is smaller than the inner diameter of the second stub shaft 31.
The embodiment of the application also provides a motor, which comprises the motor shaft.
In the motor provided by the embodiment of the application, the first end and the second end of the second shaft section 20 are respectively connected with the first shaft shoulder 12 of the first shaft section 10 and the second shaft shoulder 32 of the third shaft section 30, and in order to improve the torsion resistance of the motor shaft, at least one of the first shaft head 11 of the first shaft section 10 and the second shaft head 31 of the third shaft section 30 also respectively extends into the inner side of the second shaft section 20 and is connected with the second shaft section 20. Compared with a multi-section motor shaft connected only by a pin in one connecting mode, the motor shaft provided by the embodiment of the application has better torsion resistance, ensures the design requirement of motor shaft light weight, and can meet the power transmission requirement under the working condition of large torque.
The embodiment of the application also provides an automobile, which comprises the motor shaft or the motor.
In the automobile provided by the embodiment of the application, the first end and the second end of the second shaft section 20 are respectively connected with the first shaft shoulder 12 of the first shaft section 10 and the second shaft shoulder 32 of the third shaft section 30, and in order to improve the torsion resistance of the motor shaft, at least one of the first shaft head 11 of the first shaft section 10 and the second shaft head 31 of the third shaft section 30 also respectively extends into the inner side of the second shaft section 20 and is connected with the second shaft section 20. Compared with a multi-section motor shaft connected only by a pin in one connecting mode, the motor shaft provided by the embodiment of the application has better torsion resistance, ensures the design requirement of motor shaft light weight, and can meet the power transmission requirement under the working condition of large torque.
In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. The specification and examples are to be regarded in an illustrative manner only.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A motor shaft, characterized in that the motor shaft comprises a first shaft section (10), a second shaft section (20) and a third shaft section (30) which are sequentially arranged along the axial direction;
The first shaft section (10) is provided with a first shaft head (11) and a first shaft shoulder (12), the first shaft head (11) is positioned on the inner side of the second shaft section (20), and the first shaft shoulder (12) is connected with the first end of the second shaft section (20);
The third shaft section (30) has a second shaft head (31) and a second shaft shoulder (32), the second shaft head (31) being located inside the second shaft section (20), the second shaft shoulder (32) being connected to a second end of the second shaft section (20), the second end being opposite to the first end;
Wherein the second shaft section (20) is further connected with at least one of the first stub shaft (11) and the second stub shaft (31).
2. The motor shaft according to claim 1, characterized in that the first stub shaft (11) and the second stub shaft (31) are interference fit with the first end and the second end of the second shaft section (20), respectively.
3. The motor shaft according to claim 2, characterized in that the first stub shaft (11) has a greater interference with the first end of the second shaft segment (20) than the second stub shaft (31) has with the second end of the second shaft segment (20).
4. The motor shaft according to claim 1, characterized in that a first connection is provided between the first shoulder (12) and the first end of the second shaft section (20); and/or a second connection structure is provided between the second shoulder (32) and the second end of the second shaft section (20).
5. The motor shaft according to claim 4, wherein the first connection structure and the second connection structure are each selected from one of:
a cementing structure formed after the adhesive is solidified;
and (3) solidifying the molten welding wire to form a welding structure.
6. The motor shaft according to any one of claims 1 to 5, characterized in that the first shaft section (10) is formed with a first cavity (13) penetrating in the axial direction, and at least one first oil outlet (14) is formed on the first shaft section (10) in the radial direction, and the first oil outlet (14) is communicated with the first cavity (13) and the external environment;
The second shaft section (20) is penetrated and formed with a second cavity (21) along the axial direction, and the second cavity (21) is communicated with the first cavity (13);
the inside of third axle section (30) is formed with third cavity (33), third cavity (33) with second cavity (21) intercommunication, third axle section (30) radially has seted up at least one second oil-out (34), second oil-out (34) intercommunication third cavity (33) and external environment.
7. The motor shaft according to claim 6, characterized in that the wall thickness of the second shaft section (20) is smaller than the wall thickness of the first shaft section (10) and smaller than the wall thickness of the third shaft section (30).
8. Motor shaft according to claim 6, characterized in that the inner diameter of the first stub shaft (11) is smaller than the inner diameter of the second stub shaft (31).
9. An electric machine comprising a motor shaft according to any one of claims 1 to 8.
10. An automobile comprising the motor shaft of any one of claims 1 to 8 or comprising the motor of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323101893.2U CN221305659U (en) | 2023-11-16 | 2023-11-16 | Motor shaft, motor and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323101893.2U CN221305659U (en) | 2023-11-16 | 2023-11-16 | Motor shaft, motor and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221305659U true CN221305659U (en) | 2024-07-09 |
Family
ID=91740682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323101893.2U Active CN221305659U (en) | 2023-11-16 | 2023-11-16 | Motor shaft, motor and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221305659U (en) |
-
2023
- 2023-11-16 CN CN202323101893.2U patent/CN221305659U/en active Active
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