CN201365175Y - Motor inner stator - Google Patents
Motor inner stator Download PDFInfo
- Publication number
- CN201365175Y CN201365175Y CNU2009201142061U CN200920114206U CN201365175Y CN 201365175 Y CN201365175 Y CN 201365175Y CN U2009201142061 U CNU2009201142061 U CN U2009201142061U CN 200920114206 U CN200920114206 U CN 200920114206U CN 201365175 Y CN201365175 Y CN 201365175Y
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- tooth
- tooth piece
- winding
- iron core
- punching
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Abstract
The utility model discloses a motor inner stator comprising a plurality of iron core punching sheets which are mutually superposed in a punching way and take a round shape. The motor inner stator is characterized in that the iron core punching sheet is formed by winding up in-line strap-shaped punching sheets and lathing excircles. The motor inner stator comprises a plurality of unit tooth blocks which are connected with each other, wherein two adjacent unit tooth blocks are connected by a connecting part; the inner edge of the connecting part is provided with a notch that can reduce stress of winding; each unit tooth block comprises a tooth crown, a tooth body and a tooth root; a winding slot which opens up at the tooth root and is communicated with the notch is formed between the adjacent unit tooth blocks; and the tooth roots of the adjacent unit tooth blocks are abutted with each other after the strap-shaped punching sheets are molded by winding, thus leading the winding slot to become a closed slot hole that can be penetrated by a coil. Compared with the prior art, the utilization ratio of a punched material and winding efficiency are improved and the difficulty of winding slot design is lowered; and as the winding slot of the iron core after molding is closed, cogging torque can be eliminated, and vibration and noise caused by overlarge torque pulsation of motors are avoided.
Description
Technical field
The utility model relates to a kind of electric motor internal stator, the particularly a kind of electric motor internal stator that can realize the mechanization winding.
Background technology
Traditional electric motor internal stator all is after designing the round iron plate that matches with stator profile earlier, makes diel, the moulding of punching lamination again according to this shape.The problem that adopts this moulding process to exist is: at first, stock utilization is lower, generally in 50%; Secondly, because the coiling of internal stator generally is by being opened in the notch coiling on the iron core cylindrical, internal stator coiling in moulding is difficult to realize the mechanization operation, because the internal stator winding space after the moulding is very little, notch on the cylindrical is also very little, even if adopt the plant equipment operation, also cause winding efficiency on the low side.
For the problem that utilance is low, copper factor is low, the end is big, the winding manufacturing expenses are high that solves electrician's punching in the conventional motors stator, the existing patent No. is the magneto that 200620020255.5 Chinese utility model " split mounting type internal stator magneto " discloses a kind of internal stator structure, this stator core is spliced by the many groups of fan-shaped stator tooth pieces that twining coil, each is organized fan-shaped stator tooth piece and is made of a plurality of segmental punchings unit mutual superposition, and stator winding is in series or in parallel to form by a plurality of coils.The stator core of described patent can be used as the stator of direct startup synchronous motor or brushless DC motor, has improved problems such as the utilance of electrician's punching in the conventional motors stator is low effectively, does not have the problem of winding rule.
But, when described patent is spliced into the annular stator body at the multiple sets of teeth piece, need to adopt to be attached to the annular top board on stator body two sides, annular lower platen, assemble cumbersome by fixedly connected being integral of securing member (as bolt, screw etc.) ability that fan-shaped stator tooth piece yoke subordinate holds; Secondly, because accessory is too many, processing is very complicated, has increased production cost to a certain extent.On the other hand, stator in the above-mentioned patent still leaves notch (teeth groove) on the stator cylindrical after the moulding, the existence of these notches (teeth groove), make permanent magnet inhomogeneous with the air-gap permeance of corresponding armature surface, when rotor rotates, make that the magnetic circuit magnetic resistance changes in a magnetic state, thereby cause torque pulsation.Usually, the torque pulsation of eliminating cogging torque or suppressing to cause by teeth groove, measures such as normal employing skewed slot, fractional-slot, appropriate design pole form and magnetizing direction, but these designs can make the global design of motor become more complicated, also can increase production cost of products.
The utility model content
Technical problem to be solved in the utility model is the electric motor internal stator that no teeth groove after the simple and moulding of a kind of package assembly is provided at above-mentioned prior art present situation, this electric motor internal stator not only can be realized high efficiency machinery winding, and can also effectively eliminate the motor torque ripple that produces because of cogging torque.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this electric motor internal stator, include a plurality of mutual punching press stacks and rounded core stamping, it is characterized in that: described core stamping is reeled by the banded punching of in-line arrangement and size forms, each banded punching includes several interconnective unit tooth pieces, adjacent two unit tooth pieces are by being connected to each other by crooked under external force connecting portion, described connecting portion has the recess of the stress that can reduce to reel on inner edge, each described unit tooth piece includes crown, tooth body and tooth root, wherein, described connecting portion fuses with the crown of adjacent cells tooth piece respectively, form between the adjacent cells tooth piece one tooth root place opening and and the winding slot that is connected of described recess, distance between the tooth root of adjacent cells tooth piece satisfies following condition: behind described banded punching coiling and molding, the tooth root of adjacent cells tooth piece mutually near, make described winding slot be a closed trench hole that can pass for coil.
In order to make banded punching reach preferable coiling effect, behind coiling and molding, applying between the adjacent cells tooth piece is more steady, firmly, guarantee the relative closure of winding slot, the tooth root of each described unit tooth piece has two sides that are symmetrical arranged and tilt, a pair of the closing on of adjacent two tooth roots and form an opening that is the dovetail groove shape between the side established, and, the formed angle β of the dual-side extended line of each unit tooth piece=360/n degree, the margin of tolerance was at+0～+ 5 minute, wherein, n 〉=3, n is the quantity of the unit tooth piece that each banded punching comprised.
Described recess can be shape arbitrarily, as circular arc dehisce, ellipse is dehisced, triangle is dehisced etc., purpose is when coiling and molding, allow the extrded material in indent has certain accommodation space between the adjacent cells tooth piece, reduce the stress of reeling, fracture appears in connecting portion when preventing to reel, as preferably, described recess can be dehisced for a circular arc, subtended angle θ=90～150 of this recess °.
Need the iron core size after considering coiling, connecting portion need leave certain turning surplus, as preferably, described connecting portion is 0.5～2mm at the smallest radial width range of circumference, and the recess top that also is connecting portion is 0.5～2mm to the distance of cylindrical.
For the ease of fixing of iron core, described unit tooth piece also offers the riveted holes that diameter range is 2～4mm on tooth root.
The motor operation time need be installed Hall element, the offering the position and can determine of Hull cell according to the specific requirement of motor, and as preferably, described unit tooth piece also is reserved with Hull cell at the crown position.
Compared with prior art, advantage of the present utility model is: adopt the banded punching structure of in-line arrangement, the stock utilization when having improved stamping-out has greatly been saved the stamping-out cost;
On the other hand, because iron core is a coiling and molding after the coiling earlier, and during coiling and molding, crown between the adjacent cells tooth piece is connected together by connecting portion, the tooth root of adjacent cells tooth piece is close to together mutually, make the iron core winding slot after the moulding seal, thus, just can eliminate cogging torque, thereby guarantee the rotor and the stator stationarity that the magnetic line of force distributes when work of motor, avoid the vibration and the noise that cause because the torque pulsation of motor is excessive, can improve the overall performance of motor effectively.
Description of drawings
Fig. 1 is the banded punching structural representation of the utility model embodiment.
Fig. 2 is that A-A shown in Figure 1 is to cutaway view.
Fig. 3 is the I portion partial enlarged drawing shown in Fig. 1.
Fig. 4 is the pressure plate structure schematic diagram of the utility model embodiment.
Fig. 5 is that B-B shown in Figure 4 is to cutaway view.
Fig. 6 is the supporting structure schematic diagram of the utility model embodiment.
Fig. 7 is that C-C shown in Figure 6 is to cutaway view.
Fig. 8 is the stator module structural representation of the utility model embodiment.
Fig. 9 is that the D-D of Fig. 8 is to cutaway view.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 3, be the banded punching structural representation of the in-line arrangement of forming the utility model circular iron core, banded punching 1 coiling and molding that this iron core is formed by stacking by a plurality of mutual punching presses, each banded punching 1 includes a plurality of interconnective unit tooth piece 11, in the present embodiment, because the internal stator diameter is bigger, iron core forming is not coiling and molding of a banded punching, but be divided into three sections banded punchings 1 with same unit tooth piece number, each banded punching 1 includes 17 unit tooth pieces and forms, adjacent two unit tooth pieces 11 are by being connected to each other by crooked under external force connecting portion 12, referring to Fig. 1.
Wherein, connecting portion 12 has the semi-circular indentation 121 of the stress that can reduce to reel on inner edge, the subtended angle of this semi-circular indentation 121 is 150 °, can guarantee that banded punching 1 has sufficient extruding space between the adjacent cells tooth piece 11 when reeling, prevent that stress from concentrating the connecting portion 12 that causes to be out of shape or connecting portion 12 ruptures;
Each unit tooth piece 11 includes crown 111, tooth body 112 and tooth root 113, wherein, crown 111 is thin, tooth root 113 is thick, connecting portion 12 fuses with the crown 111 of adjacent cells tooth piece 11 respectively, the tooth root 113 of each unit tooth piece 11 has two sides that are symmetrical arranged and tilt 114, a pair of the closing on of adjacent two tooth roots 113 and form an opening 13 that is the dovetail groove shape between the side established, and, the formed angle β of dual-side 114 extended lines of each unit tooth piece 11=360/n degree, the margin of tolerance was at+0～+ 5 minute, wherein, n 〉=3, n is the quantity of the unit tooth piece that each banded punching comprised, so, between adjacent cells tooth piece 11, form a rectangle winding slot 14 at tooth root 113 places formation dovetail groove opening 13, solenoid 2 can be realized coiling by this winding slot 14, angle of inclination and its spacing of the tooth root side 114 of adjacent cells tooth piece 11 satisfy following condition: behind described banded punching coiling and molding, apart from the tooth root of adjacent cells tooth piece mutually near, make described winding slot be a closed trench hole that can pass for coil.
Iron core behind the coiling and molding is before size not, and connecting portion 12 is 0.5～2mm at the smallest radial width range (being the distances of recess 121 tops to cylindrical) of circumference, can guarantee the turning surplus on cylindrical after the coiling iron core moulding; Unit tooth piece 11 also offers the riveted holes 15 that diameter range is 2～4mm on tooth root 113, can be so that realize the fixedly connected of iron core; Usually, also have Hull cell 16 on the iron core, the position of Hull cell 16 can be arranged on iron core inner ring or on the outer ring, in the present embodiment, whole circular iron core is evenly equipped with three Hull cells 16 (being on the crown 111 of unit tooth piece 11) on the excircle.
Above-mentioned iron core adopts following manufacture method, specifically includes following processing step:
1., the monolithic stamping-out, obtain to have the banded punching 1 of monolithic that 17 continuous phases are connected to unit tooth piece 11;
2., punching laminates, the banded punching 1 of monolithic that stamping-out is obtained is one group with 55, dashes the banded punching group that builds up an integral body with the direct button of mold, the promptly corresponding stack of described unit tooth piece 11 becomes a unit tooth piece group;
3., the coiling, banded punching group is installed on the coil winding machine, be implemented in winding around 2 on each unit tooth piece group by the mechanization operation;
4., coiling and molding, be 1/3rd iron core circular arc with the banded punching group coiling and molding that coils 2, the iron core circular arc with three sections coiling and moldings is spliced into a complete circular iron core then;
5., fixing, be provided with one in the center fixed of circular iron core and be used for the internal stator support 3 that iron core is installed and machine work is located, present embodiment adopts stamping forming steel plate or aluminium alloy plate as internal stator support 3;
6., turning processing, the iron core that internal stator support 3 is installed is assembled on the lathe, turning processing is carried out to guarantee the circularity of iron core in the outer ring of iron core, wherein, the turning amount of iron core outer ring is less than or equal to the smallest radial width of connecting portion at circumference, be that iron core cylindrical after the turning reaches the recess position on the connecting portion inner edge basically, the connecting portion of this moment is 0～0.5mm at the smallest radial width of circumference.
As Fig. 6, shown in Figure 7, for being fixed in middle internal stator support 3 structural representations of moulding iron core, this support has gusset 31, the outer rim of this gusset 31 has the annular flange flange 32 that is higher than these gusset 31 thickness, the flange 32 of support 3 is at the boss 33 that circumferentially also is provided with a circle evagination, wherein, support 3 circumferentially offering of flange 32 a plurality of can with the riveted holes 15 corresponding through holes 321 on each unit tooth piece tooth root of forming iron core, support 3 offers some first connecting holes 331 on boss 33, also have on support 3 middle parts to can be used for the axis hole 33 that motor shaft is installed;
As Fig. 4, shown in Figure 5, for being used for iron core other end spacing pressing plate 4 structural representations, this pressing plate 4 is the annular slab of a hollow, pressing plate 4 annular slab upper edge circumference offer respectively can with the riveted holes 15 corresponding apertures 41 on each unit tooth piece tooth root of forming iron core, and second connecting hole 42 that can align with first connecting hole 35 on support 3 boss 33.
As Fig. 8, shown in Figure 9, be iron core, the package assembly schematic diagram of pressing plate 4 and internal stator support 3, at banded punching 1 coiling and molding and after being spliced into a complete iron core, support 3 is compressed on the side of iron core inner edge, pressing plate 4 is compressed on the opposite side of inner edge of iron core, and make the through hole 321 on the support 3, riveted holes 15 on the iron core and 41 alignment of the aperture on the pressing plate 4, first connecting hole, 331 alignment on second connecting hole 42 on the pressing plate 4 and the support 3, aperture 41 in alignment, put on bolt or screw in riveted holes 15 and the through hole 321, in first connecting hole 331 that aligns and second connecting hole 42, put on bolt or screw simultaneously, can be with iron core, pressing plate 4 and support 3 are fixedly connected on together, support 3 can be installed to the cylindrical processing that is used for iron core on the lathe, also can be installed on the motor shaft.Here, the internal stator support also can adopt the thermosets by epoxy resin embedding moulding, is about to obtain the direct injection mo(u)lding of support on iron core, to obtain better iron core fixed effect by this thermosets.
The iron core of present embodiment is the internal stator structure, owing to adopted and now laminated coiling, the technology of back coiling and molding, can realize multiple-grooved and little notch design by the inner-stator iron core that this technological forming obtains, reduce the design difficulty of winding slot, and, the technology of coiling is more simple on internal stator, can realize the mechanization winding operation, improve winding efficiency greatly, more be of value to the realization automated production.
Claims (6)
1, a kind of electric motor internal stator, include a plurality of mutual punching press stacks and rounded core stamping, it is characterized in that: described core stamping is reeled by the banded punching of in-line arrangement and size forms, each banded punching includes several interconnective unit tooth pieces, adjacent two unit tooth pieces are by being connected to each other by crooked under external force connecting portion, described connecting portion has the recess of the stress that can reduce to reel on the Inner edge, each described unit tooth piece includes crown, tooth body and tooth root, wherein, described connecting portion fuses with the crown of adjacent cells tooth piece respectively, form between the adjacent cells tooth piece one tooth root place opening and and the winding slot that is connected of described recess, distance between the tooth root of adjacent cells tooth piece satisfies following condition: behind described banded punching coiling and molding, the tooth root of adjacent cells tooth piece mutually near, make described winding slot be a closed trench hole that can pass for coil.
2, electric motor internal stator according to claim 1, it is characterized in that: the tooth root of each described unit tooth piece has two sides that are symmetrical arranged and tilt, a pair of the closing on of adjacent two tooth roots and form an opening that is the dovetail groove shape between the side established, and, the formed angle β of the dual-side extended line of each unit tooth piece=360/n degree, the margin of tolerance is at+0～+ 5 minute, wherein, n 〉=3, n is the quantity of the unit tooth piece that each banded punching comprised.
3, electric motor internal stator according to claim 1 is characterized in that: described recess is that a circular arc is dehisced, subtended angle θ=90～150 of this recess °.
4, electric motor internal stator according to claim 1 is characterized in that: described connecting portion is 0.5～2mm at the path of circumference to width range.
5, electric motor internal stator according to claim 1 is characterized in that: described unit tooth piece also offers the riveted holes that diameter range is 2～4mm on tooth root.
6, electric motor internal stator according to claim 1 is characterized in that: described unit tooth piece also is reserved with Hull cell at the crown position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201142061U CN201365175Y (en) | 2009-02-19 | 2009-02-19 | Motor inner stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201142061U CN201365175Y (en) | 2009-02-19 | 2009-02-19 | Motor inner stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201365175Y true CN201365175Y (en) | 2009-12-16 |
Family
ID=41475844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201142061U Expired - Lifetime CN201365175Y (en) | 2009-02-19 | 2009-02-19 | Motor inner stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201365175Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111021A (en) * | 2009-12-24 | 2011-06-29 | 中山大洋电机股份有限公司 | Drum motor stator structure |
| CN117277649A (en) * | 2023-11-21 | 2023-12-22 | 西比里电机技术(苏州)有限公司 | Lightweight aero-motor |
-
2009
- 2009-02-19 CN CNU2009201142061U patent/CN201365175Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111021A (en) * | 2009-12-24 | 2011-06-29 | 中山大洋电机股份有限公司 | Drum motor stator structure |
| CN117277649A (en) * | 2023-11-21 | 2023-12-22 | 西比里电机技术(苏州)有限公司 | Lightweight aero-motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO HANGZHOU BAY NEW ZONE BEIDOU MOTOR CO., LTD Free format text: FORMER OWNER: BEIDOU TECH CO., LTD., NINGBO Effective date: 20120830 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120830 Address after: 315336, No. 29 Xiao Tong Road, Hangzhou Bay New District, Zhejiang, Cixi Patentee after: Ningbo Hangzhou Wanxin Area Big Dipper Motor Co.,Ltd. Address before: 315336 Xiao Tong Road, Hangzhou Bay New District, Zhejiang, Cixi Patentee before: Ningbo Polaris Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: BOSCH (NINGBO) LIGHT ELECTRIC VEHICLE MOTOR CO., L Free format text: FORMER NAME: NINGBO HANGZHOU BAY NEW ZONE BEIDOU MOTOR CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 315336, No. 29 Xiao Tong Road, Hangzhou Bay New District, Zhejiang, Cixi Patentee after: BOSCH (Ningbo) light electric vehicle motor Co., Ltd. Address before: 315336, No. 29 Xiao Tong Road, Hangzhou Bay New District, Zhejiang, Cixi Patentee before: Ningbo Hangzhou Wanxin Area Big Dipper Motor Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091216 |
|
| CX01 | Expiry of patent term |