CN211183697U - Spliced injection molding rotor assembly - Google Patents
Spliced injection molding rotor assembly Download PDFInfo
- Publication number
- CN211183697U CN211183697U CN201922136951.2U CN201922136951U CN211183697U CN 211183697 U CN211183697 U CN 211183697U CN 201922136951 U CN201922136951 U CN 201922136951U CN 211183697 U CN211183697 U CN 211183697U
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- magnetic ring
- injection molding
- gear
- installation department
- shaft hole
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Abstract
The utility model relates to a concatenation formula rotor subassembly of moulding plastics, including gear and magnetic ring, still include the magnetic ring injection molding, the gear includes tooth portion and takes the installation department of flat position, is equipped with the shaft hole of taking the mounting plane on the magnetic ring injection molding, installation department and shaft hole assembly, the magnetic ring injection molding is installed downthehole at the magnetic ring of magnetic ring, and the both ends of magnetic ring injection molding are equipped with mounting flange, is equipped with radial spacing groove on the mounting flange, the magnetic ring downthehole wall of magnetic ring be equipped with spacing groove complex spacing boss. The utility model discloses set up flat position complex fitting surface at the installation department of gear, reduce the deflection, the cooperation is inseparabler, and the positive reverse clearance that produces when reducing gear engagement improves the meshing precision.
Description
Technical Field
The utility model relates to an electric motor rotor, especially a concatenation formula rotor subassembly of moulding plastics.
Background
The rotor assembly in a micro stepper motor is generally a split rotor assembly. Like chinese patent CN103414266A, the gears are all provided with mounting parts and mounted in the mounting holes of the magnetic rings, but such mounting structure will deform when the mounting parts are heated, resulting in the reduction of the service life of the rotor. And the fit clearance is large, the meshing clearance of the gear is increased, and the meshing precision is poor.
Disclosure of Invention
The utility model relates to a concatenation formula rotor subassembly of moulding plastics sets up flat position cooperation at the installation department of gear, reduces the deflection, and the cooperation is inseparabler, and the positive reverse clearance that produces when reducing gear engagement improves the meshing precision.
In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a concatenation formula rotor subassembly of moulding plastics, includes gear and magnetic ring, still includes the magnetic ring injection molding, the gear includes tooth portion and takes the installation department of flat position, is equipped with the shaft hole of taking the mounting plane on the magnetic ring injection molding, installation department and shaft hole assembly, the magnetic ring injection molding is installed at the magnetic ring of magnetic ring downtheholely, and the both ends of magnetic ring injection molding are equipped with mounting flange, is equipped with radial spacing groove on the mounting flange, the magnetic ring downthehole wall of magnetic ring be equipped with spacing groove complex spacing boss.
Preferably, the central axes of the gear and the magnetic ring are coaxial. The gear is ensured to rotate stably, and the noise is reduced.
Preferably, the magnetic ring and the magnetic ring injection molding piece are integrated through injection molding. The production efficiency is improved.
Preferably, the number of the limiting grooves of the magnetic ring injection molding part is four, and the number of the limiting bosses is four. And the mounting precision is ensured.
After the structure of the oil adding device is adopted, the utility model discloses a gear installation department has flat position, with the shaft hole assembly of the area mounting surface of magnetic ring injection molding. And the mounting flange of the magnetic ring injection molding is provided with a radial limit groove, the inner wall of the magnetic ring hole of the magnetic ring is provided with a limit boss matched with the limit groove, and the limit groove and the limit boss are combined, so that the deformation generated when the mounting combination part is heated is smaller, the gap between the magnetic ring injection molding and the gear, which generates relative rotation, is smaller and the matching is tighter, the forward and reverse rotating gap generated when the product is meshed is reduced, and the meshing precision of the gear is improved.
Drawings
Fig. 1 is an exploded view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrated in the accompanying drawings.
Referring to fig. 1, a spliced injection molding rotor assembly comprises a gear 1, a magnetic ring 2 and a magnetic ring injection molding piece 3, wherein the gear 1 comprises a tooth part 11 and an installation part 12 with a flat position 13, the magnetic ring injection molding piece 3 is provided with a shaft hole 31 with an installation plane 32, the installation part 12 is assembled with the shaft hole 31, the magnetic ring injection molding piece 3 is installed in a magnetic ring hole 21 of the magnetic ring 2, installation flanges 4 are arranged at two ends of the magnetic ring injection molding piece 3, radial limiting grooves 41 are arranged on the installation flanges 4, and limiting bosses 22 matched with the limiting grooves 41 are arranged on the inner wall of the magnetic ring hole 21 of the magnetic ring 2.
Referring to fig. 1, the central axes of the gear 1 and the magnetic ring 2 are coaxial. The gear 1 is ensured to rotate stably, the noise is reduced, the transmission precision is improved, and the service life is prolonged.
Referring to fig. 1, the magnetic ring 2 and the magnetic ring injection molding piece 3 are injection molded into a whole. The product quality is improved, and the production efficiency is improved.
Referring to fig. 1, the number of the limiting grooves 41 of the magnetic ring injection molded part 3 is four, and the number of the limiting bosses 22 is four. The limiting precision is ensured, and the relative rotation between the magnetic ring injection molding piece 3 and the magnetic ring 2 is avoided.
Referring to fig. 1, the utility model discloses installation department 12 of gear 1 has flat position 13, and has mounting plane 32 in the shaft hole 31 of magnetic ring injection molding 3, and installation department 12 of gear 1 inserts in the shaft hole 31 of magnetic ring injection molding 3 for flat position 13 cooperates with mounting plane 32, and it is littleer to make the installation joint portion produce the deflection when being heated, and gear 1 is littleer with the relative rotation clearance of magnetic ring injection molding 3, and the cooperation is inseparabler. The magnetic ring injection molding piece 3 and the magnetic ring 2 are integrated by injection molding, and the inner wall of the magnetic ring hole 21 of the magnetic ring 2 is provided with a limit boss 22 matched with the limit groove 41 of the mounting flange 4, so that the relative rotation between the magnetic ring injection molding piece 3 and the magnetic ring 2 is prevented.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a rotor subassembly is moulded plastics to concatenation formula, includes gear (1) and magnetic ring (2), its characterized in that: still include magnetic ring injection molding (3), gear (1) is equipped with shaft hole (31) of taking mounting plane (32) including tooth portion (11) and installation department (12) of taking flat position (13) on magnetic ring injection molding (3), installation department (12) and shaft hole (31) assembly, install in magnetic ring hole (21) of magnetic ring (2) magnetic ring injection molding (3), and the both ends of magnetic ring injection molding (3) are equipped with mounting flange (4), are equipped with radial spacing groove (41) on mounting flange (4), the magnetic ring hole (21) inner wall of magnetic ring (2) is equipped with spacing boss (22) with spacing groove (41) complex.
2. The split injection rotor assembly of claim 1, wherein: the central shafts of the gear (1) and the magnetic ring (2) are coaxial.
3. The split injection rotor assembly of claim 1, wherein: the magnetic ring (2) and the magnetic ring injection molding piece (3) are integrated through injection molding.
4. The split injection rotor assembly of claim 1, wherein: the four limit grooves (41) of the magnetic ring injection molding piece (3) are uniformly distributed, and the four limit bosses (22) are correspondingly provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922136951.2U CN211183697U (en) | 2019-12-03 | 2019-12-03 | Spliced injection molding rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922136951.2U CN211183697U (en) | 2019-12-03 | 2019-12-03 | Spliced injection molding rotor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211183697U true CN211183697U (en) | 2020-08-04 |
Family
ID=71800993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922136951.2U Active CN211183697U (en) | 2019-12-03 | 2019-12-03 | Spliced injection molding rotor assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211183697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006483A (en) * | 2021-10-15 | 2022-02-01 | 横店集团东磁股份有限公司 | Novel plastic magnetic sensing magnet for brake system and implementation method thereof |
-
2019
- 2019-12-03 CN CN201922136951.2U patent/CN211183697U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006483A (en) * | 2021-10-15 | 2022-02-01 | 横店集团东磁股份有限公司 | Novel plastic magnetic sensing magnet for brake system and implementation method thereof |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant |