CN218335468U - Rotor assembly, rotor and motor - Google Patents
Rotor assembly, rotor and motor Download PDFInfo
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- CN218335468U CN218335468U CN202221467350.5U CN202221467350U CN218335468U CN 218335468 U CN218335468 U CN 218335468U CN 202221467350 U CN202221467350 U CN 202221467350U CN 218335468 U CN218335468 U CN 218335468U
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Abstract
The application relates to a rotor assembly, a rotor and a motor. The rotor assembly includes: a rotor shaft and a rotor core. According to the scheme provided by the application, the rotor core is provided with a shaft through hole used for being installed in the rotor shaft, the shaft through hole comprises a small hole section and a large hole section which are adjacent to each other, and the rotor shaft is provided with a self-locking step which can be tightly attached to the large hole section; the rotor shaft further comprises a rib section, and the rib section is in interference fit with the small hole section. The structure realizes the secondary tight locking fit of the rotor shaft and the rotor core. Respectively as follows: the rotor iron core and the rotor shaft are controlled to be locked through interference fit of the rib section and the small hole section; after two auto-lock steps and rotor core's macropore section are hugged closely, can increase rotor core and rotor shaft surface friction, hug closely through auto-lock step and rotor core and reach the function of secondary locking, even realize that even muscle section dead lock function failure back, the rotor shaft still can drive the rotor and rotate.
Description
Technical Field
The application relates to the technical field of motors, in particular to a rotor assembly, a rotor and a motor.
Background
The main matching mode between the squirrel cage rotor and the rotating shaft of the mainstream iron-clad air-conditioning asynchronous motor in the market at present is interference fit. The diameter of the squirrel-cage rotor is a circular hole, the size of the rotating shaft is stepped, the surface of the rotating shaft is additionally provided with rib sections, and the locking of the squirrel-cage rotor and the rotating shaft is controlled through the interference fit of the rib sections and the shaft hole of the squirrel-cage rotor. After the rotating shaft is inserted into the shaft, the shaft hole of the squirrel cage rotor is expanded by the locking rib section on the surface of the rotating shaft, the squirrel cage rotor is inserted into the shaft installation machine (such as an air conditioner), the squirrel cage rotor and the rotating shaft are not matched and loosened after the air conditioner is operated for a long time, and the loosened squirrel cage rotor and the rotating shaft rib section are separated, so that the rotor and the stator winding are rubbed, and the motor winding is damaged and burnt.
Therefore, a rotor and a rotor shaft need to be designed, the rotor and the rotor shaft can be locked in a secondary matching mode through the structure of the rotor and the rotor shaft, even if the squirrel cage rotor is not matched with the rotating shaft to be loose after the air conditioner operates for a long time, when the loosened squirrel cage rotor is separated from the rotating shaft rib section, the rotor and the rotor shaft can still realize the function of secondary locking through another locking structure, namely after the rib section locking function fails, the rotor shaft can still drive the rotor to rotate.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists among the correlation technique, this application provides a rotor subassembly, this rotor subassembly can stabilize secondary cooperation locking through self structure, and then drives the rotor and rotate to can not cause rotor and rotor shaft to break away from, cause motor quality problem.
A first aspect of the present application provides a rotor assembly comprising a rotor shaft and a rotor core;
a shaft through hole is formed in the rotor iron core;
the shaft through hole comprises a small hole section and a large hole section which are adjacent;
the rotor shaft is provided with a self-locking step which can be tightly attached to the large hole section;
the rotor shaft further comprises a rib section, and the rib section is in interference fit with the small hole section.
In one embodiment, the large bore section comprises two large bore sections located at both ends of the shaft through bore.
In one embodiment, the large bore section is located at one end of the shaft through bore.
In one embodiment, the length of the large pore section is less than the length of the small pore section.
In one embodiment, the length of the large hole section is 1-2 rotor punching sheets.
In one embodiment, the rotor shaft further comprises a threaded section for connection to an external actuator.
A second aspect of the present application provides a rotor comprising the above-mentioned rotor assembly.
In one embodiment, the rotor further comprises a rotor winding, the rotor winding being a squirrel cage rotor.
A third aspect of the present application provides an electrical machine comprising a rotor assembly or a rotor as mentioned above.
The technical scheme provided by the application can comprise the following beneficial effects: the rotor assembly comprises a rotor shaft and a rotor core, wherein the rotor core is provided with a shaft through hole used for being installed in the rotor shaft, the shaft through hole comprises a small hole section and a large hole section which are adjacent to each other, and the rotor shaft is provided with a self-locking step which can be tightly attached to the large hole section; the rotor shaft further comprises a rib section, and the rib section is in interference fit with the small hole section. The structure realizes the secondary tight locking fit of the rotor shaft and the rotor core. Respectively: the rotor iron core and the rotor shaft are controlled to be locked through interference fit of the rib section and the small hole section; and secondly, after the self-locking step is tightly attached to the large hole section of the rotor core, the surface friction force between the rotor core and the rotor shaft can be increased, and the function of secondary locking is achieved by tightly attaching the self-locking step to the rotor core.
The secondary cooperation locking structure can realize that the rotor and the rotating shaft are not matched and loosened after the air conditioner operates for a long time, and the self-locking step can still drive the rotor to rotate when the loosened rotor is separated from the rotating shaft rib section.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic view of a rotor shaft configuration of a rotor assembly shown in an embodiment of the present application;
fig. 2 is a schematic view illustrating a rotor core structure of a rotor assembly according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a rotor sheet according to an embodiment of the present application.
Reference numerals
1. A rotor shaft; 11. a self-locking step; 12. a rib section; 13. a threaded segment; 2. a rotor core; 21. a shaft through hole; 211. a small pore section; 212. a macroporous section; 22. rotor punching.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
The main matching mode between the squirrel cage rotor and the rotating shaft of the mainstream iron-clad air-conditioning asynchronous motor in the market at present is interference fit. The diameter of the squirrel-cage rotor is a round hole, the size of the rotating shaft is stepped, the surface of the rotating shaft is additionally provided with a rib section, and the locking of the squirrel-cage rotor and the rotating shaft is controlled by interference fit of the rib section and a shaft hole of the squirrel-cage rotor. After the rotating shaft is inserted into the shaft, the shaft hole of the squirrel cage rotor is expanded by the locking rib section on the surface of the rotating shaft, the squirrel cage rotor is inserted into the shaft installation machine, the squirrel cage rotor is not matched with the rotating shaft after the air conditioner is operated for a long time, the loosened squirrel cage rotor is separated from the rotating shaft rib section, and the rotor and the stator winding rub to cause damage to the motor winding and burn the machine.
Therefore, a rotor and a rotor shaft need to be designed, the rotor and the rotor shaft can be locked in a secondary matching mode through the structure of the rotor and the rotor shaft, the squirrel cage rotor and the rotating shaft are not matched and loosened after the air conditioner operates for a long time, when the loosened squirrel cage rotor and the rotating shaft rib section are separated, the rotor and the rotor shaft can still realize the function of secondary locking through another locking structure, namely, after the rib section locking function fails, the rotor shaft can still drive the rotor to rotate.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a rotor shaft configuration of a rotor assembly shown in an embodiment of the present application;
fig. 2 is a schematic view of a rotor core structure of a rotor assembly according to an embodiment of the present application.
See fig. 1 and 2.
The rotor assembly of the embodiment of the application comprises a rotor shaft 1 and a rotor iron core 2; a shaft through hole 21 is formed in the rotor core 2; the shaft through hole 21 includes an adjacent small hole section 211 and a large hole section 212; the rotor shaft 1 is provided with a self-locking step 11 which can be tightly attached to the large hole section 212; the rotor shaft 1 further comprises a rib section 12, and the rib section 12 is in interference fit with the small hole section 211.
The rotor shaft 1 is a part which is mutually matched with the rotor iron core 2 and is used for driving other devices to rotate (such as a fan and a wind wheel) subsequently.
A rotor core 2, which is illustratively a squirrel cage rotor in the present application.
The rotor core 2 of the embodiment of the present application is provided with a shaft through hole 21 for mounting the rotor shaft 1, and the shape and size of the shaft through hole 21 are set in accordance with the rotor shaft 1, or the shape and size of the rotor shaft 1 are set in accordance with the shaft through hole 21 of the rotor core 2. The shaft through hole 21 includes a small hole section 211 and a large hole section 212 adjacent to each other, and the small hole section 211 has a smaller hole diameter than the large hole section 212.
The rotor shaft 1 is provided with the self-locking step 11 which can be tightly attached to the large hole section 212, the tight attachment referred to in the embodiment of the application is that when the rotor shaft 1 is installed in the shaft through hole 21, the self-locking step 11 of the rotor shaft 1 is pressed into the large hole section 212 of the rotor core 2 through the shaft entering die, the self-locking step 11 is tightly attached to the contact surface of the rotor core 2, no redundant gap exists, and the purpose of locking is achieved. After the self-locking step 11 is tightly attached to the rotor core 2, the surface friction force between the rotor core 2 and the rotor shaft 1 can be increased, and the self-locking step 11 can drive the rotor to rotate.
In addition, be equipped with muscle section 12 on the rotor shaft 1 of this application embodiment, muscle section 12 and aperture section 211 interference fit. The interference fit is that in the mechanical installation process, a plurality of parts need to be closely matched to prevent connection from falling off or transferring large torque, the interference fit is that the hole is expanded and deformed by utilizing the elasticity of materials to be sleeved on a shaft, and when the hole is restored, the clamping force of the shaft is generated to connect the two parts.
The secondary cooperation locking structure of this application embodiment can realize that it is not hard up with the pivot cooperation to have squirrel cage rotor after air conditioner long-term operation, and when the squirrel cage rotor after not hard up broke away from with pivot muscle section 12, auto-lock step 11 still can drive the rotor and rotate.
The beneficial effects of the embodiment of the application are as follows: the rotor assembly comprises a rotor shaft and a rotor core, wherein the rotor core is provided with a shaft through hole used for being installed in the rotor shaft, the shaft through hole comprises a small hole section and a large hole section which are adjacent to each other, and the rotor shaft is provided with a self-locking step which can be tightly attached to the large hole section; the rotor shaft further comprises a rib section, and the rib section is in interference fit with the small hole section. The structure realizes the secondary tight locking fit of the rotor shaft and the rotor core. Respectively: the rotor iron core and the rotor shaft are controlled to be locked through interference fit of the rib section and the small hole section; and secondly, after the self-locking step is tightly attached to the large hole section of the rotor core, the surface friction force between the rotor core and the rotor shaft can be increased, and the function of secondary locking is achieved by tightly attaching the self-locking step to the rotor core.
The secondary cooperation locking structure can realize that the squirrel cage rotor and the pivot cooperation are not hard up after the long-term operation of air conditioner, and when the squirrel cage rotor after becoming flexible breaks away from with pivot muscle section, the auto-lock step still can drive the rotor and rotate, has avoided among the prior art when the rotor because of go into axle rear axle through-hole aperture too big cause the motor to pack into rotor and rotor shaft loose fit after the long-term operation of air conditioner many times, rotor landing, rotor aluminium ring friction winding lead to the motor to burn the machine and scrap.
Example two
The rotor assembly introduced by the embodiment doubly ensures the close fit of the rotor shaft and the rotor core through the secondary matching locking structure, so that the motor is prevented from being burned and scrapped.
Fig. 3 is a schematic structural diagram of a rotor sheet according to an embodiment of the present application.
See fig. 3.
The rotor assembly of the embodiment of the application comprises a rotor core 2, wherein a shaft through hole 21 is formed in the rotor core; the shaft through hole 21 includes an adjacent small hole section 211 and a large hole section 212; the rotor shaft 1 is provided with a self-locking step 11 which can be tightly attached to the large hole section 212; the rotor shaft 1 further comprises a rib section 12, and the rib section 12 is in interference fit with the small hole section 211.
The realization mode in big section hole is that big hole section 212 includes two sections big section holes, two sections big hole section 212 are located the both ends of axle through-hole 21, set up the both ends at rotor core 2 promptly, all set the big section hole to through axle through-hole 21 both ends, auto-lock step 11 on the rotor shaft 1 can block rotor core 2 into between two auto-lock steps 11, through the interact power that two-sided clamp was hit, the locking cooperation degree that makes rotor core 2 and rotor shaft 1 is bigger, the looks interlocking tight fit that can be better.
Another implementation of the large section bore is that the large section 212 is located at one end of the shaft through bore 21. The big hole section 212 that does not restrict in this application embodiment sets up and which one end of axle through-hole 21, and rotor shaft 1's auto-lock step 11 rather than matching rotor core 2 is pressed the auto-lock step 11 of rotor shaft 1 into rotor core 2 big hole section 212 through going into the axle mould during income axle, hugs closely with rotor core 2 through auto-lock step 11 and reaches the function of locking. After the self-locking step 11 is tightly attached to the rotor iron core 2, the friction force between the rotor and the surface of the rotating shaft can be increased. For example, the large hole section 212 may be disposed at an end of the shaft through hole 21, that is, an end of the rotor core 2, and in the embodiment of the present application, the rotor shaft 1 further includes a threaded section 13, and when the rotor core 2 is installed in the rotor shaft 1, an end far away from the threaded section 13 is an end of the rotor core 2.
The length of the large hole section 212 is smaller than that of the small hole section 211, and the secondary locking function can be guaranteed by the length, so that the shape and the structure of the original rotor core 2 can not be changed too much.
The length of the large hole section 212 is 1-2 rotor punching sheets 22. For example, the thickness of the rotor sheet 22 is not limited in this application, and may be determined according to the actual application of the rotor sheet 22.
The specific operation is that the rotor core 2 is produced by punching through a punch die of a punch press, the aperture of a shaft through hole 21 of the rotor core 2 is regulated and controlled through equipment during production, the aperture of the shaft through hole 21 is controlled by the size of a column head of a lower die of the punch die, and the rotor core 2 comprises two end faces, namely the upper face and the lower face of the rotor core 2. The hole diameter is increased by using the punch head for punching the rotor sheet 22 one to two above and below the rotor core 2, and the production of the large hole section 212 is completed.
The rotor shaft 1 of the embodiment of the present application further includes a threaded section 13, and the threaded section 13 is used for connecting an external actuator, such as a wind wheel or a fan blade. The threaded section 13 is arranged at one end of the rotor shaft 1 far away from the self-locking step 11. The threaded section 13 of the embodiment of the present application may be configured and dimensioned according to the mounting hole of the external actuator to be mounted, and the embodiment of the present application is not limited.
The beneficial effects of the embodiment of the application are as follows: all set to the big section hole through axle through-hole both ends, rotor shaft is last from the locking step can block rotor core into between two auto-lock steps, and through the interact power that two-sided clamp was hit, the locking mating force degree that makes rotor core and rotor shaft is bigger, the looks interlocking tight fit that can be better.
The length of the big hole section of this application embodiment is less than the length of aperture section, and the setting of length can not only guarantee that secondary locking function can also not too much change original rotor core's shape structure.
EXAMPLE III
In addition to the rotor assembly mentioned in the above embodiments, the present embodiments accordingly provide a rotor, and the rotor of the present embodiments further includes a rotor winding, and the rotor winding of the present embodiments is a squirrel cage rotor winding.
Illustratively, the rotor of the embodiment of the present application is a squirrel cage rotor, which is provided with the squirrel cage rotor core 2 of the present application, and the rotor shaft 1, the rotor shaft 1 is interference-fitted in the shaft through hole 21 of the rotor core 2, and is in direct contact with the rotor core 2. The rotor shaft 1 is driven by the rotor to rotate, so that power can be output outwards.
Further, the present application also provides an electric machine provided with the rotor assembly mentioned in the above embodiments or the rotor of the embodiments of the present application.
For example, an electric machine according to an embodiment of the present application may include a housing, a stator within the housing, an end cover, a rotor shaft 1, and a rotor core 2 of the present application installed within the stator.
The motor of this application, the mountable drives the fan function in the air conditioner, can avoid the motor to pack into the rotor and the pivot loose joint after the long-term operation of air conditioner, and the rotor drops friction winding and leads to the motor to burn out the problem of scrapping.
The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. A rotor assembly, characterized by: comprises a rotor shaft (1) and a rotor iron core (2);
a shaft through hole (21) is formed in the rotor iron core (2);
the shaft through hole (21) comprises a small hole section (211) and a large hole section (212) which are adjacent;
the rotor shaft (1) is provided with a self-locking step (11) which can be tightly attached to the large hole section (212);
the rotor shaft (1) is further provided with a rib section (12) in interference fit with the small hole section (211).
2. The rotor assembly of claim 1 wherein:
the large hole section (212) comprises two large hole sections (212), and the two large hole sections (212) are located at two ends of the shaft through hole (21).
3. The rotor assembly of claim 1, wherein:
the large hole section (212) is located at one end of the shaft through hole (21).
4. The rotor assembly of claim 1, wherein:
the length of the large pore section (212) is smaller than the length of the small pore section (211).
5. The rotor assembly of claim 1, wherein:
the length of the large hole section (212) is 1-2 rotor punching sheets (22) in thickness.
6. The rotor assembly of claim 1, wherein:
the rotor shaft (1) further comprises a threaded section (13), and the threaded section (13) is used for connecting an external actuating mechanism.
7. A rotor, characterized by: a rotor assembly comprising a rotor assembly as claimed in any one of claims 1 to 6.
8. The rotor of claim 7, wherein: the rotor also comprises a rotor winding, and the rotor winding is a squirrel-cage rotor winding.
9. An electrical machine comprising a rotor according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221467350.5U CN218335468U (en) | 2022-06-13 | 2022-06-13 | Rotor assembly, rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221467350.5U CN218335468U (en) | 2022-06-13 | 2022-06-13 | Rotor assembly, rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218335468U true CN218335468U (en) | 2023-01-17 |
Family
ID=84866875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221467350.5U Active CN218335468U (en) | 2022-06-13 | 2022-06-13 | Rotor assembly, rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218335468U (en) |
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2022
- 2022-06-13 CN CN202221467350.5U patent/CN218335468U/en active Active
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