CN105720780A - PM stepper motor injection-molded rotor and manufacturing method thereof - Google Patents
PM stepper motor injection-molded rotor and manufacturing method thereof Download PDFInfo
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- CN105720780A CN105720780A CN201410720261.0A CN201410720261A CN105720780A CN 105720780 A CN105720780 A CN 105720780A CN 201410720261 A CN201410720261 A CN 201410720261A CN 105720780 A CN105720780 A CN 105720780A
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- magnetitum
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- injection
- injection moulding
- type motor
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Abstract
The invention relates to a PM stepper motor injection-molded rotor and a manufacturing method thereof. The rotor comprises a shaft, a magnet rack, a magnetic material layer, and an injection molding structure. The magnet rack sleeves the shaft. The magnet rack and the magnetic material layer are injection-molded as one through the injection molding structure. The internal diameter of the magnet rack is connected with the shaft in an interference fit manner. The manufacturing method comprises the following steps: (1) using a mold to machine a magnet rack of a boss structure, wherein the magnet rack is provided with a center through hole, and the outer circumference of the base of the boss is provided with a slot; (2) pressing a shaft into the magnet rack in step (1), and making the shaft connected with the internal diameter of the magnet rack in an interference fit manner; and (3) injection-molding the magnet rack and a magnetic material layer as one. Compared with the prior art, the PM stepper motor injection-molded rotor has the advantages of high reliability, high production efficiency, low manufacture cost, and the like.
Description
Technical field
The present invention relates to a kind of injection moulding rotor, especially relate to a kind of PM type motor injection moulding rotor and manufacture method thereof.
Background technology
The way of PM type motor injection moulding rotor prior art generally has 2 kinds, the first way is annular knurl (such as Fig. 1) or process a bit of groove (such as Fig. 2) on axle 1 on axle 1, together with being finally injection-moulded in injected plastics material 3, magnetic material 2 by axle (such as Fig. 3)；The second way is to overlap the upper annular knurl (such as Fig. 4) of 4 (or copper sheathings) at aluminum, and then axial compression enters aluminum set 4 (or copper sheathings) upper (such as Fig. 5), last and magnetic material integrated through injection molding (such as Fig. 6).
The defect that prior art exists has:
The first way:
1. owing to processing annular knurl (or groove) on axle, the production efficiency causing axle is low, hands over phase length and the high problem of cost.
2. owing to processing annular knurl (or groove) is limited by space, little with injected plastics material bonded area, cause axle inadequate with the adhesion of injection molding material.
3., in technique, the hardness of axle and processing annular knurl (or groove) require higher, as management and control is bad, easily cause the generation of axle fracture.
The second way:
1., owing to aluminum set (or copper sheathing) is metal processing piece, it may appear that production efficiency is low, hand over phase length and the high problem of cost.
2. being pressed into aluminum set (or copper sheathing) on axle, be ultimately molded onto integration, this technique is difficult to automatization.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide that a kind of reliability is high, production efficiency is high and the PM type motor injection moulding rotor of low cost of manufacture and manufacture method thereof.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of PM type motor injection moulding rotor, including axle, Magnetitum frame, magnetic material layer and injection structure, described Magnetitum frame overlaps on the shaft, it is characterized in that, described Magnetitum frame is injection molded into one by injection structure and described magnetic material layer, and described Magnetitum frame internal diameter adopts interference fit to be connected with described axle.
Described Magnetitum frame is boss structure, and this boss structure center is provided with wears the circular hole penetrated for axle.
Described boss base excircle is provided with at least 2 anti-rotation draw-in grooves.
The anti-rotation draw-in groove number of described Magnetitum frame is 4.
Described Magnetitum frame adopts progressive die mode to produce.
A kind of method manufacturing PM type motor injection moulding rotor, it is characterised in that comprise the following steps:
1) utilizing the Magnetitum frame of mould processing boss structure, the erection of this Magnetitum has central through hole and is provided with draw-in groove at boss base excircle；
2) axial compression is entered in Magnetitum frame described in step 1, and be connected with Magnetitum frame internal diameter interference fit；
3) the Magnetitum frame pressed and magnetic material layer are injection molded into one.
Compared with prior art, the invention have the advantages that
1, Magnetitum frame progressive die produces, the concordance of product, stability and economy are well improved, and Magnetitum frame periphery adopts anti-rotation draw-in groove, can effectively ensure the adhesion of axle and plastic material, adopt axle and Magnetitum frame interference fit, it is ensured that the adhesion of axle and injection molding material simultaneously.
2, compared with the 1st kind of way, can well avoid the hidden danger brought because of annular knurl (or groove) technique, such as off-axis, the inadequate problem of adhesion, reduce to technique according to patience, improve the reliability of injection moulding rotor.
3, compared with the 2nd kind of way, reducing in the upper annular knurl technique of aluminum set (or copper sheathing), it is to avoid the restriction of injection moulding internal rotor space structure, it is to avoid the various hidden danger that annular knurl technique is brought, and production efficiency is high, processing cost is low can realize automatization preferably.
4, Magnetitum frame is mold members, and ratio processes annular knurl (or groove) or short in the cycle of aluminum set (or copper sheathing) upper annular knurl buying on axle, and highly versatile, cost is low.
Accompanying drawing explanation
Fig. 1 is annular knurl schematic diagram on axle；
Fig. 2 is axle upper groove schematic diagram；
Fig. 3 be with groove axle be injection-moulded in magnetic material together with after schematic diagram；
Fig. 4 is the schematic diagram of annular knurl on aluminum set or copper sheathing；
Fig. 5 is the schematic diagram that axial compression enters on aluminum set or copper sheathing；
Fig. 6 be axial compression enter after aluminum set or copper sheathing with the schematic diagram of magnetic material integrated through injection molding；
Fig. 7 is Magnetitum shelf structure schematic diagram of the present invention；
Fig. 8 is the structural representation that axial compression of the present invention enters Magnetitum frame
Fig. 9 be axial compression of the present invention enter after Magnetitum frame with magnetic material injection moulding all-in-one-piece schematic diagram；
Figure 10 is the injection moulding rotor of the present invention position view in PM type motor.
Wherein A is annular knurl, and B is groove, and 1 is axle, and 2 is magnetic material, 3 is injected plastics material, and 4 is aluminum set or copper sheathing, and 5 is Magnetitum frame, and 6 is panel, 7 is bearing, and 8 is pad, and 9 is enamel-covered wire, and 10 is glue core, 11 is contact pin, and 12 is wire harness, and 13 is line lid, and 14 is casing, 15 is top panel, and 16 is pad, and 17 is gear, 18 is injection moulding rotor, and 19 is bearing, and 20 is sleeve assembly.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As Figure 7-9, a kind of PM type motor injection moulding rotor, including axle 1, Magnetitum frame 5, magnetic material layer 2 and injection structure 3, Magnetitum frame 5 fixed cover is on axle 1, described Magnetitum frame 5 is injection molded into one by injection structure 3 and described magnetic material layer 2, and described Magnetitum frame 5 internal diameter adopts interference fit to be connected with described axle 1.
Described Magnetitum frame 5 is boss structure, and this boss structure center is provided with wears the circular hole penetrated for axle.
The manufacture method of PM type motor injection moulding rotor of the present invention, including
1) utilizing the Magnetitum frame 5 of mould processing boss structure, this Magnetitum frame 5 is provided with central through hole and is provided with draw-in groove at boss base excircle；
2) axial compression is entered in Magnetitum frame described in step 1, and be connected with Magnetitum frame internal diameter interference fit；
3) the Magnetitum frame pressed and magnetic material layer are injection molded into one.
As described in Figure 10, a kind of PM type motor, including panel 6, bearing 7, pad 8, enamel-covered wire 9, glue core 10, contact pin 11, wire harness 12, line lid 13, casing 14, top panel 15, pad 16, gear 17, injection moulding rotor 18, bearing 19, sleeve assembly 20.Described injection moulding rotor 18 is above-mentioned injection moulding rotor.
Claims (6)
1. a PM type motor injection moulding rotor, including axle, Magnetitum frame, magnetic material layer and injection structure, described Magnetitum frame overlaps on the shaft, it is characterized in that, described Magnetitum frame is injection molded into one by injection structure and described magnetic material layer, and described Magnetitum frame internal diameter adopts interference fit to be connected with described axle.
2. a kind of PM type motor injection moulding rotor according to claim 1, it is characterised in that described Magnetitum frame is boss structure, and this boss structure center is provided with wears the circular hole penetrated for axle.
3. a kind of PM type motor injection moulding rotor according to claim 2, it is characterised in that described boss base excircle is provided with at least 2 anti-rotation draw-in grooves.
4. a kind of PM type motor injection moulding rotor according to claim 3, it is characterised in that the anti-rotation draw-in groove number of described Magnetitum frame is 4.
5. according to described a kind of PM type motor injection moulding rotor arbitrary in claim 1-4, it is characterised in that described Magnetitum frame adopts progressive die mode to produce.
6. the method for PM type motor injection moulding rotor described in a manufacturing claims 1, it is characterised in that comprise the following steps:
1) utilizing the Magnetitum frame of mould processing boss structure, the erection of this Magnetitum has central through hole and is provided with draw-in groove at boss base excircle；
2) axial compression is entered in Magnetitum frame described in step 1, and be connected with Magnetitum frame internal diameter interference fit；
3) the Magnetitum frame pressed and magnetic material layer are injection molded into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720261.0A CN105720780A (en) | 2014-12-02 | 2014-12-02 | PM stepper motor injection-molded rotor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720261.0A CN105720780A (en) | 2014-12-02 | 2014-12-02 | PM stepper motor injection-molded rotor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105720780A true CN105720780A (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410720261.0A Pending CN105720780A (en) | 2014-12-02 | 2014-12-02 | PM stepper motor injection-molded rotor and manufacturing method thereof |
Country Status (1)
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| CN (1) | CN105720780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044426A (en) * | 2017-04-06 | 2017-08-15 | 无锡好力泵业有限公司 | The PM rotor of draining pump and the draining pump comprising it, washing machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105158A (en) * | 1993-12-30 | 1995-07-12 | 马渊马达株式会社 | Method for manufacture of small electric motor and rotator of same |
| JP2543489Y2 (en) * | 1991-11-21 | 1997-08-06 | マブチモーター株式会社 | Rotor for rotating electric machine |
| CN1244308A (en) * | 1997-12-11 | 2000-02-09 | 巴西船用压缩机有限公司 | Bushing for rotor of electric motor for compressor |
| US20020047329A1 (en) * | 1999-05-13 | 2002-04-25 | Masahiro Sashino | Motor having rotor formed by using thermosetting resin |
| US20120062050A1 (en) * | 2010-09-13 | 2012-03-15 | Alex Horng | Rotor for Motor |
| CN204258584U (en) * | 2014-12-02 | 2015-04-08 | 上海鸣志电器股份有限公司 | A kind of PM type stepping motor injection moulding rotor |
-
2014
- 2014-12-02 CN CN201410720261.0A patent/CN105720780A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2543489Y2 (en) * | 1991-11-21 | 1997-08-06 | マブチモーター株式会社 | Rotor for rotating electric machine |
| CN1105158A (en) * | 1993-12-30 | 1995-07-12 | 马渊马达株式会社 | Method for manufacture of small electric motor and rotator of same |
| CN1244308A (en) * | 1997-12-11 | 2000-02-09 | 巴西船用压缩机有限公司 | Bushing for rotor of electric motor for compressor |
| US20020047329A1 (en) * | 1999-05-13 | 2002-04-25 | Masahiro Sashino | Motor having rotor formed by using thermosetting resin |
| US20120062050A1 (en) * | 2010-09-13 | 2012-03-15 | Alex Horng | Rotor for Motor |
| CN204258584U (en) * | 2014-12-02 | 2015-04-08 | 上海鸣志电器股份有限公司 | A kind of PM type stepping motor injection moulding rotor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044426A (en) * | 2017-04-06 | 2017-08-15 | 无锡好力泵业有限公司 | The PM rotor of draining pump and the draining pump comprising it, washing machine |
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Application publication date: 20160629 |
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| RJ01 | Rejection of invention patent application after publication |