CN203071676U

CN203071676U - Motor rotor assembly

Info

Publication number: CN203071676U
Application number: CN 201220657027
Authority: CN
Inventors: 潘明攀; 范建明
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2013-07-17
Anticipated expiration: 2022-11-30

Abstract

The utility model discloses a motor rotor assembly, which comprises a permanent magnet, a rotor iron core and a magnetic ring, wherein the rotor iron core comprises an annular ring provided with a central shaft hole and a plurality of magnetic blocks projecting from the outer side of the annular ring, and the magnetic block is provided with a through hole. A radial groove is formed between two adjacent magnetic blocks, and the permanent magnet is embedded into the radial grooves. An end plate and a bottom plate are formed on the end surface and the bottom surface of the rotor core respectively by injection moulding, wherein the end plate and the bottom plate are connected into a whole body by a connecting pole penetrating through the through hole, the end surface of the end plate projects is provided with an annular groove, and the magnetic ring is embedded into the groove. The motor rotor assembly has the advantages that the structure is simple, the installation is simple and easy, the magnetic ring material is saved, the cost is reduced, and the sensing effects are good.

Description

A kind of rotor assembly

Technical field:

The utility model relates to a kind of rotor assembly, belongs to the dc brushless motor field.

Background technology:

The rotor assembly of traditional dc brushless motor (BLDC MOTOR), generally comprise rotor core, permanent magnet, magnet ring support and magnet ring, permanent magnet is installed on the rotor core, magnet ring support and rotor core connect, magnet ring is nested on the magnet ring support, this complex structure, installation bother, the magnet ring induction is poor, and the preferable end face induction structure of employing inductive effects, magnet ring is generally disc type, the magnet ring center is provided with an axis hole and cooperates with motor shaft, this magnet ring material usage is many, and utilance is low, the cost height.

Summary of the invention:

The purpose of this utility model provides a kind of rotor assembly, and this is simple in structure, installs simple and easyly, saves the magnet ring material, reduce cost, and inductive effects is good.

The purpose of this utility model is to be achieved by following technical scheme.

A kind of rotor assembly, comprise permanent magnet, rotor core and magnet ring, rotor core comprises the annular ring that is provided with central shaft hole and some magnetic inductive blocks that protrude from the annular ring outside, offer through hole on the magnetic inductive block, between adjacent two magnetic inductive blocks, form radial groove, permanent magnet embeds in the radial groove, on the end face of rotor core and bottom surface, be injected with end plate and base plate respectively, end plate is connected in aggregates with base plate by the joint pin that passes through hole, on the end face of end plate annular groove is set, magnet ring embeds in the groove.

Described above protrudes some fixture blocks at bottom portion of groove, end plate, and fixture block embeds in the draw-in groove of offering on the bottom surface of magnet ring.

Magnet ring described above is concentric with central shaft hole, and magnet ring is close on the end plate by rotor core absorption.

Protrude stop hook on the both sides magnetic inductive block of the peristome of radial groove described above, be injected with outer panel at inboard, the peristome place of stop hook, outer panel is connected one with end plate with base plate.

Described above arranges boss in the middle of the bottom of radial groove, be injected with interior plate in the boss both sides, and interior plate is connected one with end plate with base plate.

The lateral surface of magnetic inductive block described above is the arcwall face that exposes, and lateral surface is that the some A with the center O certain distance H of off center axis hole is the center of circle.

Be respectively equipped with the clay groove on end plate described above and the base plate.

Some fixture blocks described above are 3, asymmetric being distributed on the end plate.

End plate described above, base plate, joint pin, outer panel and interior plate integrated injection molding.

The utility model beneficial effect compared with prior art is:

1) on the end face of the utility model end plate annular groove is set, magnet ring embeds in the groove, because the pole orientation of magnet ring is consistent with following rotor core pole orientation, be close on the end plate by rotor core absorption, simple in structure, install simple and easy, economical with materials reduces cost, and strengthens the magnet ring induction, reduce the interference that the magnet ring induction is subjected to the main field of permanent magnet generation, inductive effects is good.

2) protrude some fixture blocks at bottom portion of groove, end plate, fixture block embeds in the draw-in groove of offering on the bottom surface of magnet ring, is used for magnet ring and circumferentially locatees, and installs simple and easy.

3) magnet ring is concentric with central shaft hole, and magnet ring is close on the end plate by rotor core absorption, and induced field is even, and inductive effects is good, realizes the assembling of ring axial magnetic location, installs simple and easy.

4) protrude stop hook on the both sides magnetic inductive block of the peristome of radial groove, inboard, peristome place at stop hook are injected with outer panel, outer panel is connected one with end plate with base plate, boss is set in the middle of the bottom of radial groove, be injected with interior plate in the boss both sides, interior plate is connected one with end plate with base plate, and end plate, base plate, outer panel and interior plate wrap permanent magnet, connects fastening.

5) be respectively equipped with the clay groove on end plate and the base plate, the clay groove is used for placing proofreaies and correct dynamically balanced clay, convenient simple and easy.

6) end plate, base plate, joint pin, outer panel, interior plate and magnet ring support integrated injection molding are simplified working process, and save cost of labor.

Description of drawings:

Fig. 1 is the stereogram of utility model;

Fig. 2 is exploded view of the present utility model;

Fig. 3 is the utility model front view;

Fig. 4 is the A-A phantom of Fig. 3;

Fig. 5 is the B-B partial enlarged drawing of Fig. 4;

Fig. 6 is the utility model end view;

Fig. 7 is the C-C phantom of Fig. 6;

Fig. 8 is the local structure for amplifying schematic diagram of the utility model rotor core.

Embodiment:

Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.

Embodiment one: as Fig. 1 and shown in Figure 8, the utility model is a kind of rotor assembly, comprise permanent magnet 1, rotor core 2 and magnet ring 4, rotor core 2 comprises the annular ring 22 that is provided with central shaft hole 21 and the some magnetic inductive blocks 23 that protrude from annular ring 22 outsides, offer through hole 27 on the magnetic inductive block 23, between adjacent two magnetic inductive blocks 23, form radial groove 24, permanent magnet 1 embeds 24 li of radial grooves, on the end face of rotor core 2 and bottom surface, be injected with end plate 35 and base plate 36 respectively, end plate 35 is connected in aggregates with base plate 36 by the joint pin 37 that passes through hole 27, annular groove 350 is set on the end face of end plate 35, and magnet ring 4 embeds 350 li of grooves.

Embodiment two: as shown in Figure 2, increase following technical characterictic on the basis of embodiment one: in groove 350 bottoms, end plate 35 protrudes some fixture blocks 351, fixture block 351 embeds 41 li of the draw-in grooves offered on the bottom surface of magnet rings 4.

Embodiment three: as shown in Figure 4, increase following technical characterictic on the basis of embodiment one or embodiment two: magnet ring 4 is concentric with central shaft hole 21, and magnet ring 4 is close on the end plate 35 by rotor core 2 absorption.

Embodiment four: as Fig. 4 and shown in Figure 7, basis at embodiment one increases following technical characterictic: the both sides magnetic inductive block 23 of the peristome 25 of radial groove 24 protrudes stop hook 26, inboard, peristome 25 places at stop hook 26 are injected with outer panel 38, and outer panel 38 is connected one with end plate 35 with base plate 36.

Embodiment five: as shown in Figure 7, increase following technical characterictic on the basis of embodiment four: in the middle of the bottom at radial groove 24 boss 28 is set, is injected with interior plate 39 in boss 28 both sides, interior plate 39 is connected one with end plate 35 with base plate 36.

Embodiment six: as shown in Figure 8, increase following technical characterictic on the basis of embodiment one: the lateral surface 231 of magnetic inductive block 23 is the arcwall faces that expose, and lateral surface 231 is that the some A with the center O certain distance H of off center axis hole 21 is the center of circle.

Embodiment seven: as shown in Figure 4, increase following technical characterictic on the basis of embodiment one: end plate 35 and base plate 36 are respectively equipped with

clay groove

5a, 5b.

Embodiment eight: as shown in Figure 2, increase following technical characterictic on the basis of embodiment two: some fixture blocks 351 are 3, asymmetric being distributed on the end plate 35.

Embodiment nine: as Fig. 4 and shown in Figure 7, increase following technical characterictic on the basis of embodiment five: end plate 35, base plate 36, joint pin 37, outer panel 38 and interior plate 39 integrated injection moldings.

Because the application is mechanical field, the apparent association of ability those of ordinary skill obtains: the technical characterictic independent assortment of the increase that embodiment two, embodiment three, embodiment four, embodiment five, embodiment six, embodiment seven, embodiment eight and embodiment nine mention is combined into new technical scheme with the technical scheme of embodiment one.

As shown in Figure 5, arrow is represented the direction in magnetic field, and the magnetic direction that the utility model rotor core 2 produces is consistent with the magnetic direction of magnet ring 4, the magnetic field that rotor core 2 produces has strengthened the induction in magnet ring 4 magnetic fields, reduces and disturbs, and effectively prevents magnet ring 4 demagnetizations, simultaneously, magnet ring 4 is inhaled mutually with rotor core 2, and magnet ring 4 is attracted on the end 35, simplify installation procedure, simple in structure, install simple and easyly, save the magnet ring material, reduce cost, inductive effects is good.

Claims

1. rotor assembly, comprise permanent magnet (1), rotor core (2) and magnet ring (4), rotor core (2) comprises the annular ring (22) that is provided with central shaft hole (21) and the some magnetic inductive blocks (23) that protrude from annular ring (22) outside, offer through hole (27) on the magnetic inductive block (23), between adjacent two magnetic inductive blocks (23), form radial groove (24), permanent magnet (1) embeds radial groove (24) lining, it is characterized in that: on the end face of rotor core (2) and bottom surface, be injected with end plate (35) and base plate (36) respectively, end plate (35) is connected in aggregates with base plate (36) by the joint pin (37) that passes through hole (27), annular groove (350) is set on the end face of end plate (35), and magnet ring (4) embeds groove (350) lining.

2. a kind of rotor assembly according to claim 1 is characterized in that: protrude some fixture blocks (351) at groove (350) bottom, end plate (35), draw-in groove (41) lining of offering on the bottom surface of fixture block (351) embedding magnet ring (4).

3. a kind of rotor assembly according to claim 1 and 2, it is characterized in that: magnet ring (4) is concentric with central shaft hole (21), and magnet ring (4) is close on the end plate (35) by rotor core (2) absorption.

4. a kind of rotor assembly according to claim 1, it is characterized in that: the both sides magnetic inductive block (23) of the peristome (25) of radial groove (24) is gone up and is protruded stop hook (26), inboard, peristome (25) in stop hook (26) locate to be injected with outer panel (38), and outer panel (38) is connected one with end plate (35) with base plate (36).

5. a kind of rotor assembly according to claim 4, it is characterized in that: boss (28) is set in the middle of the bottom of radial groove (24), be injected with interior plate (39) in boss (28) both sides, interior plate (39) is connected one with end plate (35) with base plate (36).

6. a kind of rotor assembly according to claim 1, it is characterized in that: the lateral surface (231) of magnetic inductive block (23) is the arcwall face that exposes, and lateral surface (231) is that the point (A) with center (O) the certain distance H of off center axis hole (21) is the center of circle.

7. a kind of rotor assembly according to claim 1 is characterized in that: be respectively equipped with on end plate (35) and the base plate (36) the clay groove (5a, 5b).

8. a kind of rotor assembly according to claim 2, it is characterized in that: some fixture blocks (351) are 3, asymmetric being distributed on the end plate (35).

9. a kind of rotor assembly according to claim 5 is characterized in that: end plate (35), base plate (36), joint pin (37), outer panel (38) and interior plate (39) integrated injection molding.