CN215772712U

CN215772712U - Bonded neodymium iron boron magnet ring rotor assembly

Info

Publication number: CN215772712U
Application number: CN202122300554.1U
Authority: CN
Inventors: 戈俊杰; 戈福庆
Original assignee: Changzhou Hongyu Magnetic Industry Co ltd
Current assignee: Changzhou Hongyu Magnetic Industry Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-02-08
Anticipated expiration: 2031-09-22

Abstract

The utility model relates to a bonding neodymium iron boron magnetic ring rotor subassembly belongs to the technical field of magnetic ring rotor, and it includes the dabber, the dabber outside cover is equipped with interior plastic part, the outside cover of interior plastic part is equipped with two magnetic rings, the outside fixedly connected with spacer ring of interior plastic part, the spacer ring is located between two magnetic rings, the spacer ring passes through locating part and magnetic ring fixed connection. This application has the effect that reduces the magnetic ring and takes place the drunkenness phenomenon.

Description

Bonded neodymium iron boron magnet ring rotor assembly

Technical Field

The application relates to the field of magnetic ring rotors, in particular to a bonded neodymium iron boron magnetic ring rotor assembly.

Background

The bonded neodymium iron boron magnet is a magnet prepared by mixing rapidly quenched neodymium iron boron magnetic powder and a bonding agent and performing compression molding. The bonded magnet has high dimensional accuracy, and can be made into magnetic components with relatively complex shapes, such as bonded neodymium iron boron magnetic rings. In practical application, the bonded neodymium iron boron magnetic ring is often fixed with a rotating shaft inside, forms a rotor in cooperation with the rotating shaft, and is installed in the stepping motor.

In the related technology, the bonded neodymium iron boron magnetic ring is fixed on the surface of the rotating shaft by adopting glue, when the motor is in long-term load or overload, the temperature of the surface of the rotating shaft rises, the bonding performance of the glue is reduced, the risk of glue failure exists, the magnetic ring moves or even flies out, and further the motor is possibly out of control.

SUMMERY OF THE UTILITY MODEL

In order to reduce the phenomenon of magnetic ring drunkenness and take place, this application provides a bonding neodymium iron boron magnetic ring rotor subassembly.

The application provides a pair of bonding neodymium iron boron magnetic ring rotor subassembly adopts following technical scheme:

the utility model provides a bonding neodymium iron boron magnetic ring rotor subassembly, includes the dabber, the dabber outside cover is equipped with moulds the piece in, the outside cover of moulding the piece in is equipped with two magnetic rings, the outside fixedly connected with spacer ring of moulding the piece in, the spacer ring is located between two magnetic rings, the spacer ring passes through locating part and magnetic ring fixed connection.

Through adopting above-mentioned technical scheme, the locating part is with spacer ring and magnetic ring fixed connection to realized the relative fixation of magnetic ring and interior plastic part, reduced the possibility that the magnetic ring takes place the drunkenness at dabber rotation in-process, thereby increased rotor subassembly's stability.

Optionally, the limiting part includes a plurality of limiting protrusions arranged on the spacer ring, the plurality of limiting protrusions are arranged in a circumferential array along the mandrel, and a limiting groove adapted to the limiting protrusions is arranged on the magnetic ring.

By adopting the technical scheme, when the rotor assembly is driven, the limiting lug on the spacer ring is matched with the limiting groove on the magnetic ring, so that the possibility of relative rotation of the magnetic ring and the spacer ring is reduced, and the connection strength of the magnetic ring and the inner plastic part is increased.

Optionally, the outer side wall of the inner plastic part is provided with a channeling-preventing protrusion, the inner side wall of the first magnetic ring is provided with a channeling-preventing groove, and the channeling-preventing protrusion is matched with the channeling-preventing groove.

Through adopting above-mentioned technical scheme, prevent scurrying protruding and prevent scurrying the recess and mutually supporting effect, restricted the axial motion of magnetic ring for interior plastic part to reduce the magnetic ring and the possibility of interior plastic part breaking away from, further improved the joint strength of magnetic ring and interior plastic part.

Optionally, the interior piece of moulding is including interior wheel and the foreign steamer of mutual coaxial setting, the dabber outside is located to interior wheel cover, the foreign steamer inlays and locates in the magnetic ring, interior wheel and foreign steamer pass through the strengthening rib and connect.

By adopting the technical scheme, compared with an internal plastic part with a solid structure, on one hand, the internal plastic part in the scheme is lighter in weight, the material consumption of the internal plastic part is reduced, and the rotating effective power of the rotor component is improved; on the other hand, the hollow structure of the scheme reduces the extrusion on the inner side wall of the magnetic ring when the inner plastic part is expanded by heat, thereby reducing the occurrence of the phenomenon that the magnetic ring is damaged due to cracks.

Optionally, the reinforcing ribs are arranged in a plurality along the circumferential array of the mandrel.

Through adopting above-mentioned technical scheme, the joint strength of interior wheel and foreign steamer has further been strengthened to a plurality of strengthening ribs that set up, simultaneously, because a plurality of strengthening ribs are circumference array along the circumference of dabber and distribute, dynamic balance when having guaranteed the rotor subassembly and rotating.

Optionally, the inner wheel, the outer wheel, the reinforcing ribs and the spacer ring are integrally formed by compression molding.

By adopting the technical scheme, in the compression molding process, the inner wheel, the outer wheel, the reinforcing ribs and the spacer ring are compressed and molded between the mandrel and the magnetic ring. Through the integrative compression moulding of embossing mold utensil for connect the complex precision and improve between each spare part, product quality therefore obtains promoting, makes automated production efficiency higher simultaneously.

Optionally, a chamfer is arranged on the side edge of the magnetic ring far away from one end of the spacer ring.

Through adopting above-mentioned technical scheme, when the installation, compare in the right angle side, the area of contact of chamfer face is bigger, just also is difficult damaged by the bruise when bearing external force, and the chamfer face is more smooth, also is difficult for causing the cut to operating personnel.

Optionally, the surface of the magnetic ring is plated with an epoxy resin layer.

Through adopting above-mentioned technical scheme, epoxy layer multiplicable magnetic ring is corrosion-resistant and high temperature resistance's performance, promotes the life of magnetic ring.

In summary, the present application includes at least one of the following beneficial technical effects:

through the arrangement of the limiting piece, the relative fixation of the magnetic ring and the inner plastic piece is realized, the possibility of the magnetic ring moving in the rotation process of the mandrel is reduced, and the stability of the rotor assembly is improved;

the arrangement of the anti-channeling bulges and the anti-channeling grooves limits the axial movement of the magnetic ring relative to the inner plastic part, thereby reducing the possibility of separation of the magnetic ring from the inner plastic part and further improving the connection strength of the magnetic ring and the inner plastic part;

through the arrangement of the chamfer, the contact area between the magnet ring body and a foreign object can be increased, and the possible effect of being gouged when the magnet ring body is installed is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is an exploded view of an internal structure embodying an embodiment of the present application.

Description of reference numerals: 1. a mandrel; 2. an inner plastic part; 21. an inner wheel; 22. an outer wheel; 221. a channeling-preventing protrusion; 23. reinforcing ribs; 3. a magnetic ring; 31. a channeling-preventing groove; 32. chamfering; 4. a spacer ring; 41. a limiting groove; 5. a limiting member; 51. and a limiting bump.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses bonding neodymium iron boron magnetic ring rotor subassembly. Referring to fig. 1 and 2, the bonded neodymium iron boron magnetic ring rotor assembly comprises a mandrel 1, an inner plastic part 2 and two magnetic rings 3 with the same specification, wherein the mandrel 1, the inner plastic part 2 and the two magnetic rings 3 are coaxially arranged, and the inner plastic part 2 is located between the mandrel 1 and the magnetic rings 3. The outer side of the inner plastic part 2 is sleeved with a spacer ring 4, the spacer ring 4 is positioned between the two magnetic rings 3, and the spacer ring 4 is connected with the magnetic rings 3 through a limiting part 5. Through the arrangement of the limiting part 5, the mutually opposite surfaces of the magnetic ring 3 and the spacer ring 4 are tightly attached together, so that the possibility of the magnetic ring 3 shifting in the rotation process of the mandrel 1 is reduced, and the stability of the rotor assembly is enhanced.

Referring to fig. 1, the inner plastic part 2 includes an inner wheel 21 and an outer wheel 22, the inner wheel 21 and the outer wheel 22 are coaxially disposed, the inner wheel 21 is sleeved outside the core shaft 1, the outer wheel 22 is embedded in the magnetic ring 3, and a reinforcing rib 23 is fixedly connected between the inner wheel 21 and the outer wheel 22. Therefore, the inner wheel 21, the outer wheel 22 and the reinforcing ribs 23 form the inner plastic part 2 with a hollow structure, compared with a solid structure, the weight of the inner plastic part 2 is lighter, the consumable materials of the inner plastic part 2 are less, and the effective power of the rotor assembly is improved when the rotor assembly rotates; in addition, the structure reduces the extrusion of the inner side wall of the magnetic ring 3 when the inner plastic part 2 is expanded by heat, thereby reducing the occurrence of the phenomenon that the magnetic ring 3 is damaged due to cracks. In order to further enhance the connection strength between the inner wheel 21 and the outer wheel 22 and meet the requirement of torque transmission, a plurality of reinforcing ribs 23 are provided. In order to ensure the dynamic balance of the rotor assembly during rotation and reduce the vibration generated during rotation of the rotor assembly, the plurality of reinforcing ribs 23 are distributed in a circumferential array along the circumferential direction of the core shaft 1.

Referring to fig. 2, both ends of the outer side wall of the outer wheel 22 are fixedly connected with anti-channeling projections 221, one ends of the inner side walls of the two magnetic rings 3, which are far away from the spacer ring 4, are provided with anti-channeling grooves 31, the anti-channeling projections 221, which are close to each other, are matched with the anti-channeling grooves 31, and the anti-channeling projections 221 and the anti-channeling grooves 31 are all annular. Through the mutual matching action of the anti-channeling protrusion 221 and the anti-channeling groove 31, the movement of the magnetic ring 3 in the axial direction of the mandrel 1 is limited, so that the possibility of the magnetic ring 3 shifting or flying out in the rotation process of the mandrel 1 is reduced, and the reliability of the rotor assembly is improved.

Referring to fig. 2, the limiting member 5 includes a plurality of limiting protrusions 51, in this embodiment, the limiting protrusions 51 are uniformly distributed on two sides of the spacer ring 4, four limiting protrusions 51 are disposed on each side of the spacer ring 4, four limiting grooves 41 are disposed at one end of the magnetic ring 3 corresponding to two sides of the spacer ring 4 and close to the spacer ring 4, and each limiting protrusion 51 is matched with the limiting groove 41. Therefore, the limiting precision between the spacer ring 4 and the magnetic ring 3 is ensured, and the phenomenon of relative rotation between the magnetic ring 3 and the spacer ring 4 is reduced, so that the relative rotation between the magnetic ring 3 and the inner plastic part 2 is reduced, and the connection strength between the magnetic ring 3 and the inner plastic part 2 is enhanced. Meanwhile, the outer surfaces of the limiting lugs 51 on the two sides of the spacer ring 4 are attached to the inner surfaces of the limiting grooves 41 on the corresponding magnetic ring 3 on each side, so that the coaxiality of the magnetic ring 3 and the spacer ring 4 can be ensured, the phenomenon of polarization generated by the rotor assembly is reduced, and the stability of the rotor assembly is further improved.

Referring to fig. 1, the inner wheel 21, the outer wheel 22, the reinforcing ribs 23 and the spacer 4 are integrally compression molded by a compression molding process, and in the compression molding process, the inner wheel 21, the outer wheel 22, the reinforcing ribs 23 and the spacer 4 are collectively compression molded between the core shaft 1 and the magnetic ring 3. Through the integrative compression moulding of embossing mold utensil for connect the complex precision and improve between each spare part, product quality therefore obtains promoting, makes automated production efficiency higher simultaneously.

Referring to fig. 1, the magnetic ring 3 is made of bonded neodymium iron boron and is a permanent magnetic material with high magnetic energy product, so that the power density of the rotor assembly is improved, and the volume efficiency performance is better. The surface of the magnetic ring 3 is plated with the epoxy resin layer, so that the corrosion resistance and the high temperature resistance of the magnetic ring 3 can be improved, and the service life of the magnetic ring 3 is prolonged.

Referring to fig. 1, chamfers 32 are respectively arranged on the side edges of one ends of the two magnetic rings 3, which are far away from the spacer ring 4, and are used for increasing the contact area between the side edges of the end surfaces of the magnetic rings 3 and foreign objects when the rotor assembly is installed, and reducing the possibility that the side edges of the end surfaces of the magnetic rings 3 are gouged. In order to ensure that the stress of the chamfer 32 is more uniform and the anti-gouging capability is better, the angle of the chamfer 32 is set to be 45 degrees. The length of the chamfer 32 is matched with the size of the magnetic ring 3, and is determined according to the inner diameter and the outer diameter of the magnetic ring 3 in practical application.

The implementation principle of the bonded neodymium iron boron magnetic ring rotor assembly in the embodiment of the application is as follows: through the mutual matching action of the limiting lugs 51 at the two sides of the spacer ring 4 and the limiting grooves 41 on the corresponding magnetic rings 3 at each side, the limiting precision between the spacer ring 4 and the magnetic rings 3 is ensured, the relative rotation between the magnetic rings 3 and the spacer ring 4 is reduced, and the connecting strength between the magnetic rings 3 and the inner plastic part 2 is enhanced.

Through the mutual matching action of the anti-channeling protrusion 221 and the anti-channeling groove 31, the movement of the magnetic ring 3 in the axial direction of the mandrel 1 is limited, so that the possibility of the magnetic ring 3 shifting or flying out in the rotation process of the mandrel 1 is reduced, and the reliability of the rotor assembly is improved.

Adopt compression moulding technology, with interior wheel 21, foreign steamer 22, strengthening rib 23 and spacer ring 4 compression moulding between dabber 1 and magnetic ring 3 in the lump, through the integrative compression moulding of embossing mold utensil for connect the precision of cooperation and improve between each spare part, product quality therefore obtains promoting, makes automated production efficiency higher simultaneously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a bonding neodymium iron boron magnetic ring rotor subassembly, includes dabber (1), its characterized in that: the magnetic core is characterized in that an inner plastic part (2) is sleeved on the outer side of the core shaft (1), two magnetic rings (3) are sleeved on the outer side of the inner plastic part (2), a spacer ring (4) is fixedly connected to the outer side of the inner plastic part (2), the spacer ring (4) is located between the two magnetic rings (3), and the spacer ring (4) is fixedly connected with the magnetic rings (3) through limiting parts (5).

2. The bonded neodymium iron boron magnetic ring rotor assembly of claim 1, wherein: the limiting piece (5) comprises a plurality of limiting lugs (51) arranged on the spacer ring (4), the limiting lugs (51) are arrayed in a plurality along the circumferential direction of the mandrel (1), and limiting grooves (41) matched with the limiting lugs (51) are formed in the magnetic ring (3).

3. The bonded neodymium iron boron magnetic ring rotor assembly of claim 1, wherein: the outer side wall of the inner plastic part (2) is provided with a channeling-preventing protrusion (221), the inner side wall of the magnetic ring (3) is provided with a channeling-preventing groove (31), and the channeling-preventing protrusion (221) is matched with the channeling-preventing groove (31).

4. The bonded neodymium iron boron magnetic ring rotor assembly of claim 1, wherein: interior mould piece (2) including interior wheel (21) and foreign steamer (22) of mutual coaxial setting, the dabber (1) outside is located in interior wheel (21) cover, foreign steamer (22) are inlayed and are located in magnetic ring (3), interior wheel (21) and foreign steamer (22) are connected through strengthening rib (23).

5. The bonded NdFeB magnet ring rotor assembly as claimed in claim 4, wherein: the reinforcing ribs (23) are arrayed in a plurality along the circumferential direction of the mandrel (1).

6. The bonded NdFeB magnet ring rotor assembly as claimed in claim 5, wherein: the inner wheel (21), the outer wheel (22), the reinforcing ribs (23) and the spacer ring (4) are integrally formed by compression molding.

7. The bonded neodymium iron boron magnetic ring rotor assembly of claim 1, wherein: and a chamfer (32) is arranged on the side edge of one end of the magnetic ring (3) far away from the spacer ring (4).

8. The bonded neodymium iron boron magnetic ring rotor assembly of claim 1, wherein: the surface of the magnetic ring (3) is plated with an epoxy resin layer.