CN1104084C - Motor case for miniature motors - Google Patents
Motor case for miniature motors Download PDFInfo
- Publication number
- CN1104084C CN1104084C CN 97117899 CN97117899A CN1104084C CN 1104084 C CN1104084 C CN 1104084C CN 97117899 CN97117899 CN 97117899 CN 97117899 A CN97117899 A CN 97117899A CN 1104084 C CN1104084 C CN 1104084C
- Authority
- CN
- China
- Prior art keywords
- field frame
- motor field
- motor
- acute angle
- shoulder part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001154 acute effect Effects 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 230000014509 gene expression Effects 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010409 ironing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Abstract
A motor case for small-sized motor, which is formed during deep drawing a thin armor plate to a bottomed hollow cylinder, the cross-section contour involves at least one set of parallel straight lines and having sharp corners, and at the open end having a stepped part for orientation of the motor case cover and fixing, thereinto, the thickness of the corner la near the boundary between a stepped part 12 and a body part 1b is formed smaller than that of the corner la of the body part lb. Or the roundness of 0.1 to 0.2mm radius is formed at the inner periphery end of the boundary between the stepped part and the body part.
Description
Technical field
The present invention relates to a kind of motor field frame that is used for the miniature motor on the small-sized rotary machine (for example electronic terraced cutter), in more detail, the present invention relates to a kind of motor field frame that is used for miniature motor, this housing is by becoming a plating sheet metal or the deep-draw of carbon steel thin plate a tubular at the bottom of the hollow belt to make, its cross section comprises at least one pair of parallel lines and has acute angle, and has a shoulder part that is used for motor field frame is covered location and fix in position at its openend.
Background technology
Fig. 1 illustrates the longitudinal sectional view of having used miniature motor example of the present invention.In Fig. 1, the motor field frame of the tubular at the bottom of the hollow belt that one of label 1 expression is made with metal material (for example mild steel), and be equipped with one securely at the inner circumferential surface of this housing and for example be the permanent magnet 2 of the block-shaped formation stator of arc.One of label 3 expression is made so that the motor field frame that is assemblied on the open end of motor field frame 1 covers by this way with thermoplastic or with the combination of thermoplastic and metal material.
Label 4 expressions comprise one towards the armature 5 of permanent magnet 2 and the rotor of commutator 6, and this rotor is rotatably supported on the bearing 7 and 8 that is arranged on motor field frame 1 and the motor field frame lid 3.
One of label 9 expression is made bar shaped with electric conducting material (for example copper or copper alloy) and is had a brush arm that is used for doing with commutator 6 brush 10 of sliding contact, and this arm assembly is on motor field frame lid 3.Be provided with the terminals 11 that are electrically connected with brush arm 9 works in the inside of motor field frame lid 3, be used for giving armature 5 supply of electric power by brush arm 9, brush 10 and commutator 6 from the DC power supply of an outside.
Use the motor of said structure, when electric current supply armature 5, be configured in by just being subjected to a rotatory force on the armature 5 in the 2 formed magnetic fields of the permanent magnet on the inner circumferential surface that is assemblied in motor field frame 1 securely, be connected various parts on this rotor 4 thereby rotor 4 is rotated with driving.
Fig. 2 is the perspective view that the major part of motor field frame 1 shown in Fig. 1 and motor field frame lid 3 is shown.In Fig. 2, one of label 12 expression is arranged on the shoulder part on the openend of motor field frame 1, is used for axis direction along motor field frame 1 motor field frame lid 3 location and fix in position.Motor field frame 1 is to become a cylindrical member at the bottom of the hollow belt to make by electroplating the sheet metal deep-draw to one, and its cross sectional shape comprises pair of parallel line and for example a pair of concentric segmental arc, and 4 acute angle 1a.Bead portion of label 13 expressions, its arm is thick to be made thickly less than the arm of chassis body 1b, is used for blocking motor field frame lid 3 securely by crimping after on the openend that motor field frame lid 3 is positioned at motor field frame 1.
Above-mentioned motor field frame 1 can be made by deep-draw, for example discloses this method in Japanese patent laid-open publication gazette Hei-6 (1994)-1970.That is to say, becoming a cup-shaped spare by the predetermined thickness of die-cut plating sheet metal or thin carbon steel plate preparation and the bad deep-draw of disc hair of diameter, and then stand the stretching process of repetition, increase the degree of depth of the cylindrical member at the bottom of this hollow belt gradually and reduce its inside dimension and wall thickness gradually, to obtain the motor field frame of this shape as shown in Figure 2.
Fig. 3 is the longitudinal sectional view that the deep-draw situation of motor field frame 1 is shown.In Fig. 3, label 21 expression top dies, label 22 expression counterdie drifts; Each all has the interior and external peripheral surface of the outer and inner circumferential surface that is used to form motor field frame 1 and is suitable for doing vertically relative motion.Flared part of label 23 expression, its outside dimension should be fit to match with the internal diameter size of bead portion 13 among Fig. 2.Use the mould of said structure, when bottom punch head 22 is secured in place and during top die 21 landing, has just made motor field frame 1, also can be made into bead portion 13 and shoulder part 12 among Fig. 2 by flared part 23 simultaneously.
In deep-draw operation as shown in Figure 3, the blank spare of motor field frame 1 is stretched downwards or vertically, is forced to simultaneously inwardly or along inside perpendicular to the direction of axis.In this process, the part at the acute angle place on the flared part 23 that is in counterdie drift 22 on the inner circumferential surface of motor field frame 1 tends to be cut off.The result has produced coating residue and burr.In the motor field frame with acute angle 1a 1 shown in Figure 2, the trend that coating residue and burr concentrate on the acute angle 1a is obvious especially, this, in part because at the steel-sheet thickness at acute angle 1a place thickness, in part because bigger power is acted on the shoulder edge of acute angle 1a by counterdie drift 22 greater than other parts.That is to say that the ironing speed of blank is high more, coating residue that is produced and burr are also just many more.
Fig. 4 is vertical view that the situation that motor field frame 1 unloads down from counterdie drift 22 after the deep-draw operation is shown.Same part is represented with the same label in Fig. 2 and 3.In Fig. 4, when motor field frame 1 is upwards pushed away by the stripper apparatus (not shown), the burr 14 of the generation of the boundary vicinity between shoulder part 12 and chassis body 1b in the above described manner often produces by this way, make that burr is suspension downwards just when the external peripheral surface of the internal circular surfaces of casing 1 and counterdie drift 22 when the state time of sliding contact and motor field frame 1 are moving upward mutually.
If owing to above-mentioned deep-draw operation produces burr and other residues, they all or part of may peel off and enter the inside of miniature motor, thereby causes the fault of rotation, the positioning accuracy that reduces the motor field frame lid 3 that is shown among Fig. 1 and 2 and the reduction of motor performance.
After motor field frame 1 is made, remove these burrs and will be referred to the manual operations of trouble, thereby will increase manufacturing cost with other residues.
Use the carbon steel thin plate can prevent to produce the coating residue when the deep-draw, but still can produce the burr of some as the material of motor field frame 1.In addition, use carbon steel plate to need to electroplate the anticorrosive measure of laying in steel after making, compare with using electroplating steel plate, this has also caused the increase of total cost.For this reason, electroplating steel plate is commonly used to the material as motor field frame 1.
Summary of the invention
The intent of the present invention is to solve these intrinsic in the prior art problems.The object of the present invention is to provide a kind of motor field frame that is used for miniature motor, this housing can prevent the burr that produces owing to the deep-draw operation and other undesirable residues, can keep the performance of miniature motor simultaneously and reduces production costs.
To achieve these goals, content according to an aspect of the present invention, a kind of motor field frame that is used for miniature motor is provided, this housing is by becoming a sheet metal deep-draw cylindrical member at the bottom of the hollow belt to make, its cross-sectional shape comprises at least one pair of parallel lines and has acute angle, and comprise that at its openend one is used for the shoulder part of motor field frame lid location and fix in position, wherein this shoulder partly and the wall thickness of this acute angle of this boundary vicinity between the chassis body make less than the wall thickness at the acute angle place on this chassis body.
To achieve these goals, content according to a second aspect of the invention, a kind of motor field frame that is used for miniature motor is provided, this housing is by becoming a sheet metal deep-draw cylindrical member at the bottom of the hollow belt to make, its cross-sectional shape comprises at least one pair of parallel lines and has acute angle, and comprising that at its openend one is used for the shoulder part of motor field frame lid location and fix in position, the radius of corner of one of them 0.1-0.2 millimeter is arranged on this shoulder partly and on the inner circumferential edge of this boundary between this chassis body.
Use has the motor field frame of said structure, just can prevent the generation of coating residue and burr during the deep-draw operation.In addition, by when the counterdie drift is unloaded down, prevent the generation of burr and other residues at this motor case, can keep the precision of this shoulder part.
The present invention with said structure and operation can reach following effect.
(1), thereby when deep-draw, can significantly reduce the generation of coating residue and burr because the acute angle place has the wall thickness part littler than the wall thickness of chassis body.
(2) improved the shoulder dimensional accuracy partly that is used for the positioning motor cap.Thereby cause the improvement of micro-machine performance.
(3) the later reprocessing of deep-draw can significantly reduce, thereby causes the reduction of production cost.
(4) during the deep-draw operation of using high ironing speed, coating residue and burr can reduce effectively.
Description of drawings
Fig. 1 is the longitudinal sectional view that the example of having used a miniature motor of the present invention is shown;
Fig. 2 is that the motor field frame 1 and the motor field frame that illustrate among Fig. 1 cover 3 perspective view;
Fig. 3 is the longitudinal sectional view that the deep-draw situation of motor field frame 1 is shown;
Fig. 4 is the longitudinal sectional view that the situation that motor field frame 1 unloads down from counterdie drift 22 after the deep-draw operation is shown;
Fig. 5 illustrates the perspective view that embodies motor field frame 1 of the present invention;
Fig. 6 is the longitudinal sectional view that is illustrated among Fig. 5 near the amplification of the major part of shoulder part 12 and inclined surface 15;
Fig. 7 is the longitudinal sectional view that is illustrated in the amplification of the major part of the shoulder part on the close part except that acute angle 1a among Fig. 5;
Fig. 8 is the longitudinal sectional view that the deep-draw state that embodies motor field frame 1 of the present invention is shown;
Fig. 9 illustrates the longitudinal sectional view that embodies the situation that motor field frame 1 of the present invention unloads down from counterdie drift 22 after the deep-draw operation.
Embodiment
Fig. 5 is the perspective view of one embodiment of the present of invention.Same part is represented with the same label among Fig. 2.In Fig. 5, inclined surface of label 15 expressions, this surface is near forming by this way on the acute angle 1a of the boundary between shoulder part 12 and the chassis body 1b, makes the wall thickness of motor field frame 1 reduce gradually to its inside from its openend.
Fig. 6 is the longitudinal sectional view that shoulder part 12 and inclined surface 15 near zones among Fig. 5 are shown.In Fig. 6, symbol theta is represented the oblique angle of inclined plane 15 with respect to axis, and symbol b represents the width of shoulder part 12 perpendicular to its axis direction.In Fig. 6, oblique angle θ is preferably 2 °～15 °.The oblique angle θ that surpasses 15 ° is undesirable, because it can increase the drawing rate of the blank at acute angle 1a place shown in Figure 5, cause similar those troubles that run in the prior art and when after deep-draw, being fixed on the frame, will reduce its positioning and guiding effect to motor field frame 1.The oblique angle will make during less than 2 ° this inclined surface prolong and cause harmful gap with the permanent magnet 2 of secure fit on the inner circumferential surface of motor field frame 1, as shown in Figure 1.
The width b of shoulder part 12 is preferably less than 0.15 millimeter.The width b that surpasses 0.15 millimeter is undesirable, because it can increase the drawing rate of blank.
In the present invention, preventing to produce at acute angle 1a place the residue of coating and burr can be by realizing the method for making near the wall thickness of the acute angle 1a of the boundary between shoulder part 12 and chassis body 1b less than the wall thickness of the acute angle on the chassis body 1b.Therefore, except forming at above-mentioned boundary vicinity the above-mentioned inclined surface 15, by provide thin-walled portion 16 (as among Fig. 6 with shown in the chain-dotted line) can obtain same effect.
Fig. 7 is the longitudinal sectional view of amplification that is illustrated in shoulder part 12 near zones of the other parts the acute angle 1a in Fig. 5.In Fig. 7, radius of corner R is arranged on the inner circumferential edge of the boundary between shoulder part 12 and the chassis body 1b; Preferably 0.1～0.2 millimeter of this radius of corner R.In the present invention, during deep-draw, the part except that acute angle 1a of motor field frame 1 is difficult to stick on the external peripheral surface of counterdie drift 22 (seeing Fig. 3 and Fig. 4).
The radius of corner R that sets the 0.1-0.2 millimeter will produce coating residue and the burr with wane during the deep-draw operation on the surface of the blank that is drawn and push, thereby will stop them just to peel off and fall down from the surface of motor field frame 1.Radius of corner is set the fillet effect that will damage burr and other residues less than 0.1 millimeter for, and the radius of corner above 0.2 millimeter is undesirable, because it can not keep the width b (see figure 6) of the reality of shoulder part 12.
Fig. 8 illustrates the longitudinal sectional view that one embodiment of the present of invention are in the deep-draw state.Same part is represented with the same label among Fig. 3.In Fig. 8, label 24 expression is arranged near the inclined surface 15 corresponding locational sloping portions at the acute angle 1a place of motor field frame 1 shown in the flared part 23 of counterdie drift 22 and the boundary between the housing 22a and Fig. 5 and 6.
Motor field frame 1 (embryo spare) with said structure is only opening one apart from δ during the deep-draw vertically near sloping portion 24.This enlarging distance is more much smaller than the distance of the enlarging in Fig. 3.Thereby can produce less coating residue and burr.
Fig. 9 illustrates the longitudinal sectional view that embodies the situation that motor field frame 1 of the present invention unloads down from counterdie drift 22 after the deep-draw operation.Same part uses the same label in Fig. 6 and 8 to represent.In Fig. 9, inclined surface 15 is to be formed near on the acute angle 1a of the boundary between the chassis body 1b of shoulder part 12 and motor field frame 1 by being shown in sloping portion 24 among Fig. 8.Therefore, even when motor field frame 1 upwards promotes by the stripper apparatus (not shown), can not produce, because the external peripheral surface of counterdie drift 22 does not contact with the inclined surface 15 of motor field frame 1 as the burr under Fig. 4 situation 14 yet.
In the various embodiments described above, explanation is to comprise that around its cross sectional shape the straight line of pair of parallel and the motor field frame 1 of a pair of concentric segmental arc make.But this motor field frame 1 also can be tetragonal cross section.The present invention can use on the tubular motor field frame at the bottom of its cross sectional shape comprises the hollow belt of the straight line of pair of parallel and acute angle.
Claims (5)
1. motor field frame that is used for miniature motor, this housing is by becoming a sheet metal deep-draw cylindrical member at the bottom of the hollow belt to make, its cross-sectional shape comprises at least one pair of parallel lines and has acute angle, and comprise that at its openend one is used for the shoulder part of motor field frame lid location and fix in position, it is characterized in that the wall thickness of the described acute angle of the boundary vicinity between described shoulder part and chassis body is made less than the wall thickness of the described acute angle on the described chassis body.
2. the motor field frame that is used for miniature motor as claimed in claim 1, it is characterized in that, an inclined surface is arranged in such a way the described acute angle place of this boundary vicinity between described shoulder part and described chassis body, makes the wall thickness of described motor field frame little by little increase to its inside from its openend.
3. the motor field frame that is used for miniature motor as claimed in claim 2 is characterized in that, described inclined surface is set in 2 °～15 ° with respect to the oblique angle of the axis of described motor field frame.
4. the motor field frame that is used for miniature motor as claimed in claim 1 is characterized in that, the width setup of described shoulder part is less than 0.15 millimeter.
5. motor field frame that is used for miniature motor, this housing is by becoming a sheet metal deep-draw cylindrical member at the bottom of the hollow belt to make, its cross-sectional shape comprises at least one pair of parallel lines and has acute angle, and comprise that at its openend one is used for the shoulder part of motor field frame lid location and fix in position, it is characterized in that, the radius of corner of a 0.1-0.2 millimeter be arranged on described motor field frame on the inner circumferential edge of boundary between described shoulder part and the chassis body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP226208/96 | 1996-08-28 | ||
| JP226208/1996 | 1996-08-28 | ||
| JP22620896A JP3195246B2 (en) | 1996-08-28 | 1996-08-28 | Motor case for small motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1176519A CN1176519A (en) | 1998-03-18 |
| CN1104084C true CN1104084C (en) | 2003-03-26 |
Family
ID=16841598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97117899 Expired - Lifetime CN1104084C (en) | 1996-08-28 | 1997-08-28 | Motor case for miniature motors |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3195246B2 (en) |
| CN (1) | CN1104084C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004328909A (en) | 2003-04-25 | 2004-11-18 | Nippon Densan Corp | Cylindrical part, its manufacturing method and motor using the same |
| KR101099961B1 (en) | 2010-01-26 | 2011-12-28 | 주식회사비.엠.씨 | ouble motorcase, and apparatus and method for manufacturing the same |
-
1996
- 1996-08-28 JP JP22620896A patent/JP3195246B2/en not_active Expired - Fee Related
-
1997
- 1997-08-28 CN CN 97117899 patent/CN1104084C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1176519A (en) | 1998-03-18 |
| JP3195246B2 (en) | 2001-08-06 |
| JPH1070860A (en) | 1998-03-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Dalian wanbaozhi Motor Co. Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract fulfillment period: He Tongqi Contract record no.: 041000030001 Denomination of invention: Motor housing of a small-sized motor Granted publication date: 20030326 License type: General permission Record date: 20040129 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT:DURATION OF CONTRACT Name of requester: WANGBAOZHI MOTOR DALIAN CO., LTD. Effective date: 20040129 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huayuan motor (Jiangsu) Co., Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract fulfillment period: 2004-05-01 to the contract period Contract record no.: 041000030097 Denomination of invention: Motor housing of small motor Granted publication date: 20030326 License type: Common License Record date: 20041022 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT:2004-05-01 TO CONTRACT Name of requester: HUAYUAN MOTOR (JIANGSU) CO., LTD. Effective date: 20041022 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Mabuchi motor (Dongguan) Co., Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract record no.: 2010990000650 Denomination of invention: Motor case for miniature motors Granted publication date: 20030326 License type: Common License Open date: 19980318 Record date: 20100903 Assignee: Dalian wanbaozhi Motor Co. Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract record no.: 2010990000712 Denomination of invention: Motor case for miniature motors Granted publication date: 20030326 License type: Common License Open date: 19980318 Record date: 20100903 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Mabuchi motor (Yingtan) Co., Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract record no.: 2011990001086 Denomination of invention: Motor case for miniature motors Granted publication date: 20030326 License type: Common License Open date: 19980318 Record date: 20111212 Assignee: Dongguan Daojiao Mabuchi Motor Co.,Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract record no.: 2011990001087 Denomination of invention: Motor case for miniature motors Granted publication date: 20030326 License type: Common License Open date: 19980318 Record date: 20111212 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 19980318 Assignee: Mabuchi motor (Jiangxi) Co., Ltd. Assignor: Mabuchi Motor Co., Ltd. Contract record no.: 2013990000212 Denomination of invention: Motor case for miniature motors Granted publication date: 20030326 License type: Common License Record date: 20130509 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20030326 |
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| CX01 | Expiry of patent term |