CN112311139A - Motor hollow shaft - Google Patents
Motor hollow shaft Download PDFInfo
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- CN112311139A CN112311139A CN202011244381.XA CN202011244381A CN112311139A CN 112311139 A CN112311139 A CN 112311139A CN 202011244381 A CN202011244381 A CN 202011244381A CN 112311139 A CN112311139 A CN 112311139A
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- Prior art keywords
- hollow
- output end
- shaft
- section
- hollow section
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- 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
- H02K7/003—Couplings; Details of shafts
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a hollow shaft of a motor, which consists of three sections, namely an output end, a hollow section and a non-output end; the hollow section is hollow structure, and the hollow section both ends are fixed through following any one or several kinds of modes with output and non-output respectively: snap fit, weld, or threaded connection; the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes which are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled. The hollow shaft of the motor provided by the invention has the advantages that the weight of the rotor is reduced through the hollow structure design of the rotor shaft, the working energy consumption is lower, the material usage amount is reduced, the production cost is reduced, in addition, the air pressure inside and outside the hollow shaft is consistent after the hollow shaft is assembled through the arrangement of the exhaust holes communicated with the hollow structure, and the cracks at the connecting part are effectively prevented.
Description
Technical Field
The invention belongs to the technical field of motor manufacturing, and particularly relates to a hollow shaft of a motor.
Background
In the middle of the motor is used, because the rotor is too heavy, the motor can vibrate, the operation is not stable, the noise is large, the additional resistance moment is large, the normal work of the motor is seriously influenced, and the solid rotor also has the problems of large consumption of materials during manufacturing, large energy consumption during working and the like. However, although the existing rotor shaft is provided with a hollow structure, the internal air pressure and the external air pressure of the hollow structure are inconsistent after the rotor shaft is welded, and the welded part is easy to crack when the motor rotates at a high speed, so that the service life of the motor is influenced.
Disclosure of Invention
In view of the above, the present invention discloses a hollow shaft for an electric motor to overcome or at least partially solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a hollow shaft of a motor, which consists of three sections, namely an output end, a hollow section and a non-output end;
the hollow section is of a hollow structure, and two ends of the hollow section are respectively fixed with the output end and the non-output end in any one or more of the following modes: snap fit, weld, or threaded connection;
the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes, and the exhaust holes are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled.
Furthermore, the exhaust hole is provided with a dustproof plug.
Further, the output end and the non-output end are fixed to the hollow section by laser welding.
Further, the output end and the non-output end are interference-fitted with the hollow section before welding.
Furthermore, the output end is provided with a spline for ensuring the coaxiality of the output end and the connecting shaft.
Furthermore, the diameter of the hollow section is larger than the diameters of the output end and the non-output end, and rabbets are arranged at the joints of the two ends of the hollow section and the output end and the non-output end for realizing the centering and the positioning of the connection.
Further, the output end and/or the non-output end is/are provided with a hollow groove communicated with the hollow structure relative to the side of the hollow section.
Further, the shape of the hollow groove is any one or combination of the following: cylinder, truncated cone and cone.
Further, the hollow groove is obtained by swaging and/or drilling.
Furthermore, a plurality of iron core key grooves are formed in the hollow section, and the iron core key grooves penetrate through the whole hollow section.
The invention has the advantages and beneficial effects that:
the hollow shaft of the motor provided by the invention has the advantages that the weight of the rotor is reduced through the hollow structure design of the rotor shaft, the working energy consumption is lower, the material consumption is reduced, the production cost is reduced, in addition, the air pressure inside and outside the hollow shaft is consistent after the hollow shaft is assembled through the arrangement of the exhaust holes communicated with the hollow structure, and the cracks at the connecting part are prevented.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a front view of a hollow shaft of an electric motor in an embodiment of the present invention;
fig. 2 is an axial cross-sectional view of a hollow shaft of a motor in an embodiment of the present invention.
In the figure: 1. output, 2, hollow section, 3, non-output, 4, dustproof end cap, 5, spline, 6, hollow groove, 7, iron core keyway.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In one embodiment of the present invention, a hollow shaft of a motor is disclosed, as shown in fig. 1, the hollow shaft is composed of three sections, i.e., an output end 1, a hollow section 2 and a non-output end 3.
The hollow section 2 is of a hollow structure, and two ends of the hollow section 2 are respectively fixed with the output end 1 and the non-output end 3 in any one or more of the following ways: snap-fit, welded or screwed connections, but may of course also be fixed by other connection means, for example by screwing or riveting.
The output end 1 and/or the hollow section 2 and/or the non-output end 3 are/is provided with a plurality of exhaust holes, the exhaust holes are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after assembly, and the exhaust holes are uniformly arranged around the axial lead of the motor shaft to meet the dynamic balance of the hollow shaft.
To sum up, the motor hollow shaft that this embodiment provided has reduced the weight of rotor through to rotor shaft hollow structure design, and work power consumption is lower, has reduced the material use amount simultaneously, has reduced manufacturing cost, in addition through setting up the exhaust hole with hollow structure intercommunication, makes the hollow shaft inside and outside atmospheric pressure unanimous after the assembly, prevents that the junction from appearing the crack, has prolonged the life-span of rotor shaft.
In one embodiment, as shown in fig. 2, in order to prevent the vent holes from being exposed, particles enter the hollow structure of the rotor shaft, and prevent the vent holes from generating whistling sound due to high-speed rotation of the rotor shaft, dust plugs 4 are arranged on the vent holes to plug the vent holes, and the plugging mode can be that the vent holes are plugged through bolts or screws.
In one embodiment, the output end 1 and the non-output end 3 are fixed to the hollow section 2 by laser welding, but may be fixed by other welding methods.
In one embodiment, the output 1 and the non-output 3 are interference fitted with the hollow section 2 before welding. And the output end 1, the non-output end 3 and the hollow section 2 are assembled in a cold pressing or heating mode by using an oil press, and welding is carried out after the assembly is finished.
In one embodiment, as shown in fig. 1, the output end 1 is provided with a spline 5 for ensuring the coaxiality of the output end 1 and the connecting shaft, so that vibration and noise in the transmission process are effectively reduced, and the transmission efficiency is improved.
In one embodiment, the diameter of the hollow section 2 is larger than the diameters of the output end 1 and the non-output end 3, and the joints between the two ends of the hollow section 2 and the output end 1 and the non-output end 3 are provided with rabbets for realizing the centering and positioning of the connection. Of course, the output end 1 and the non-output end 3 may be provided with corresponding spigots, so that the axial lines of the hollow section 2, the output end 1 and the non-output end 3 are on the same straight line.
In one embodiment, the output end 1 and/or the non-output end 3 is provided with a hollow groove 6 communicated with the hollow structure at the side opposite to the hollow section 2, so that the mass of the hollow shaft is reduced, and the manufacturing cost is saved.
In one embodiment, the shape of the hollow groove 6 is any one or combination of the following: cylinder, truncated cone and cone. As shown in fig. 2, the hollow groove 6 has a shape of a combination of a cylinder, a truncated cone and a cone. The shape of the hollow groove 6 can be a combination of other shapes, not only limited to a cylinder, a truncated cone and a cone, but also the hollow groove 6 can be other single shapes.
In one embodiment, the hollow groove 6 is obtained by swaging and/or drilling. The hollow grooves 6 on the output end 1 and the non-output end 3 can be machined by swaging and drilling respectively, or by one of swaging and drilling.
In one embodiment, as shown in fig. 1, a plurality of core key slots 7 are provided on the hollow section 2, the number and the shape of the core key slots 7 may be set as required, the core key slots 7 penetrate through the whole hollow section 2, and the rotor core is assembled and fixed on the hollow shaft through the core key slots 7.
In summary, the invention discloses a hollow shaft of a motor, which consists of three sections, namely an output end, a hollow section and a non-output end; the hollow section is hollow structure, and the hollow section both ends are fixed through following any one or several kinds of modes with output and non-output respectively: snap fit, weld, or threaded connection; the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes which are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled. The hollow shaft of the motor provided by the invention has the advantages that the weight of the rotor is reduced through the hollow structure design of the rotor shaft, the working energy consumption is lower, the material consumption is reduced, the production cost is reduced, in addition, the air pressure inside and outside the hollow shaft is consistent after the hollow shaft is assembled through the arrangement of the exhaust holes communicated with the hollow structure, the cracks at the joint are prevented, and the service life of the rotor shaft is prolonged.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A hollow shaft of a motor is characterized in that the hollow shaft consists of three sections, namely an output end, a hollow section and a non-output end;
the hollow section is of a hollow structure, and two ends of the hollow section are respectively fixed with the output end and the non-output end in any one or more of the following modes: snap fit, weld, or threaded connection;
the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes, and the exhaust holes are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled.
2. The hollow motor shaft according to claim 1, wherein the exhaust hole is provided with a dust plug.
3. The hollow motor shaft of claim 1, wherein said output end and said non-output end are secured to said hollow section by laser welding.
4. The motor hollow shaft of claim 3 wherein the output end and the non-output end are interference fitted with the hollow section prior to welding.
5. The hollow motor shaft of claim 1, wherein the output end is provided with splines for ensuring the coaxiality of the output end with the connecting shaft.
6. The hollow motor shaft according to claim 1, wherein the diameter of the hollow section is larger than the diameters of the output end and the non-output end, and the joints between the two ends of the hollow section and the output end and the non-output end are provided with spigots for centering and positioning the connection.
7. The hollow motor shaft according to claim 1, wherein the output end and/or the non-output end are provided with a hollow groove opposite to the hollow section side, which hollow groove communicates with the hollow structure.
8. The hollow motor shaft according to claim 7, wherein the shape of the hollow groove is any one or a combination of the following: cylinder, truncated cone and cone.
9. Hollow motor shaft according to claim 7, characterized in that the hollow groove is produced by swaging and/or drilling.
10. An electric motor hollow shaft according to any one of claims 1-9, wherein a plurality of core keyways are provided on said hollow section, said core keyways extending through the entire hollow section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244381.XA CN112311139A (en) | 2020-11-10 | 2020-11-10 | Motor hollow shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244381.XA CN112311139A (en) | 2020-11-10 | 2020-11-10 | Motor hollow shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112311139A true CN112311139A (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011244381.XA Pending CN112311139A (en) | 2020-11-10 | 2020-11-10 | Motor hollow shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112311139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904491A (en) * | 2021-09-26 | 2022-01-07 | 常熟希那基汽车零件有限公司 | New energy blind hole hollow motor shaft and processing method thereof |
-
2020
- 2020-11-10 CN CN202011244381.XA patent/CN112311139A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904491A (en) * | 2021-09-26 | 2022-01-07 | 常熟希那基汽车零件有限公司 | New energy blind hole hollow motor shaft and processing method thereof |
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