CN2935610Y - Overall plastic shell permanent-magnet DC motor for household electric seamer - Google Patents
Overall plastic shell permanent-magnet DC motor for household electric seamer Download PDFInfo
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- CN2935610Y CN2935610Y CN 200620106305 CN200620106305U CN2935610Y CN 2935610 Y CN2935610 Y CN 2935610Y CN 200620106305 CN200620106305 CN 200620106305 CN 200620106305 U CN200620106305 U CN 200620106305U CN 2935610 Y CN2935610 Y CN 2935610Y
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- direct current
- permanent magnet
- overall plastic
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Abstract
The utility model discloses a full-plastic housed permanent magnetic DC motor of a household electric sewer, which comprises two tile-shaped magnetic steel elements, a brush plate and a rotor component. The housing is a two-section full plastic construction, wherein, a magnetic ring is arranged in the housing with two symmetrically-arranged tile-shaped magnetic steel elements applied on the internal wall of the magnetic ring, and the brush plate mounted on a projecting screw hole position at one end of the magnetic ring; or a three-section full plastic housing is provided with the magnetic ring arranged in the middle housing, and two symmetrically-arranged tile-shaped magnetic steel elements applied on the internal wall of the magnetic ring, and the brush plate is fixed on the screw hole position at one end of the middle housing. A fan is mounted at the shaft at the side of the rotor component. This utility model may replace a single-phase series-excited motor traditionally employed by the household electric sewer, which undoubtedly has good economic and social benefits owing to energy-saving, material efficiency and high performance, and the full-plastic permanent magnetic DC motor can also be used in other technical fields such as household appliances.
Description
Technical field
The utility model relates to permanent magnet direct current motor, especially relates to a kind of overall plastic shell permanent magnet direct current motor of electric household use in sewing machine.
Background technology
The micromotor that the electric household sewing machine adopts generally is single-phase series motor traditionally.This traditional type single-phase series motor stator component is made of stator core (silicon steel sheet is overrided to form) and stator coil, stator coil is generally by the coiling of copper enamelled wire, and rotor part is by formations such as armature core (silicon steel sheet is overrided to form), armature winding (by the coiling of copper enamelled wire), commutator, axle, oiliness bearings.The subject matter that this traditional type single-phase series motor exists is: 1) stator component need consume silicon steel sheet and copper enamelled wire, and under the market background that current steel, copper material price rise steadily, the motor cost constantly rises, and profit margin descends; 2) mechanical property of single-phase series motor belongs to soft mechanical characteristic class motor, and when being subjected to load torque fluctuation, the fluctuation of speed is bigger, and is influential to the sewing machine operating condition; 3) stator core and stator coil all lossy generation when motor operation, and cause heating, therefore, the efficient of single-phase series motor all lower (generally between 0.35～0.45).
If adopt miniature magnetic DC motor that these three shortcomings of traditional type single-phase series motor are improved.Because the casing that the permanent magnet direct current motor stator component adopts watt shape permanent magnetic steel and ferrimagnet to make is formed, do not consume silicon steel sheet and copper enamelled wire, save steel and copper material and helped reducing the motor cost, permanent magnet direct current motor belongs to hard mechanical property class motor, the rotating speed of motor is subjected to the influence of load torque fluctuation very little, and speed stability is good during running; Because stator component is excitatory by permanent magnetic steel, the no any energy loss of stator component itself produces during motor operation, and therefore, the efficient of permanent magnet motor will be apparently higher than single-phase series motor (generally can reach 0.65～0.75).Therefore, replace single-phase series motor as electric household used in driving sewing machine motor, not only reduced the manufacturing cost of motor but also overcome some inherent defects of traditional type single-phase series motor with permanent magnet direct current motor.In addition, permanent magnet direct current motor adopts decompression speed, and speed adjusting performance is also fine, as long as reasonable in design, motor still can quite stable when low-speed running, speed-regulating range width, and adjusting speed accuracy is good, and the fluctuation of speed is little, and running is stable.
Fig. 1, Figure 2 shows that traditional type iron-clad permanent magnet direct current motor typical structure.It mainly contains compositions such as front end housing 1, brush plate parts 2, support 3, watt shape permanent magnetic steel 4, rotor part 5, oiliness bearing 6.Support 3 is stretched by the good steel plate of magnetic property and makes, two slices watts of shape permanent magnetic steels 4 of inner chamber bonding, the magnetic line of force that two slices watts of shape permanent magnetic steels 4 send constitutes the air-gap field that closed magnetic circuit forms motor by the armature core of support 3 and rotor part 5, brush plate parts 2 are fixed on the front end housing 1, brush plate parts 2 and commutator constitute the reversing arrangement of DC motor, when motor during by direct current armature winding under the air-gap field effect, produce electromagnetic torque, make motor operation.This traditional type iron-clad permanent magnet direct current motor uses wide, and especially the following low-voltage permanent magnet direct current motor of 30W uses in equipment utensils such as toy, household electrical appliance in a large number as miniature power.This traditional type iron-clad permanent magnet direct current motor is because shell is that metal material is made, at supply voltage greater than the use occasion more than 100 volts, insulation of Electric Motor is required high, the shell conduction, do not belong to the double insulation structure, when being installed on the sewing machine, for guaranteeing personal safety, motor must reliable ground.
Summary of the invention
The purpose of this utility model is to provide a kind of permanent magnet direct current motor of overall plastic shell structure, to replace the traditional type single-phase series motor of using on the electric household sewing machine.
The technical scheme that its technical problem that solves the utility model adopts is:
Scheme one:
The utility model is included in two slices watts of shape permanent magnetic steels that permanent magnet direct current motor housing inner chamber is equipped with symmetric arrangement, the brush plate parts, and rotor part, rotor part are positioned at the space that two slices watts of shape permanent magnetic steels surround, and the rotating shaft two end supports is on oiliness bearing.Described housing is overall plastic casing, link into an integrated entity with trip bolt by fore shell and back cover, magnetic guiding loop is set in the housing, and the magnetic guiding loop inwall is bonded with two slices watts of shape permanent magnetic steels of symmetric arrangement, and the brush plate parts are fixed on two screw hole pin that magnetic guiding loop one end stretches out.
Scheme two:
The utility model is included in two slices watts of shape permanent magnetic steels that permanent magnet direct current motor housing inner chamber is equipped with symmetric arrangement, the brush plate parts, and rotor part, rotor part are positioned at the space that two slices watts of shape permanent magnetic steels surround, and the rotating shaft two end supports is on oiliness bearing.Described housing is overall plastic casing, link into an integrated entity with trip bolt by front housing, middle casing and back cabinet, in the middle casing magnetic guiding loop is set, the magnetic guiding loop inwall is bonded with two slices watts of shape permanent magnetic steels of symmetric arrangement, on two screw hole pin during the brush plate parts are fixed in casing one end.
More than in two kinds of schemes, on the axle of rotor part one side, fan is housed also.
The beneficial effect that the utility model had is,
1) and single-phase series motor: efficient height (exceeding 30% approximately), energy-conservation, save copper material and steel and reduced the complete machine manufacturing cost, mechanical property is hard, speed-regulating range width, when disturbed by load torque the fluctuation of speed little, speed stability is good, good speed adjustment features.The utility model is compared with traditional type iron-clad permanent magnet direct current motor; casing is the double insulation structure; be specially adapted to civil power and exchange 100 volts of above power supplys; casing need not to be provided with special safety ground system; easy to use, be provided with fan, the cooling effect of motor is better; be beneficial to the temperature rise that reduces motor, be particularly useful for the use occasion of the frequent startup-shutdown of motor.
2) compare with the traditional type miniature magnetic DC motor: because casing is overall plastic structure, the permeability of plastics is space permeability μ.Can be similar to and think not magnetic conduction of casing.Traditional type permanent magnet direct current motor casing is that its permeability of ferromagnetic material is μ
0Hundred times, be called permeability magnetic material.Therefore, watt shape permanent magnetic steel can directly be bonded on the inboard wall of base, forms the main magnetic circuit of motor jointly with armature core.When casing adopts overall plastic structure, in order to form the main magnetic circuit of motor, the magnetic guiding loop of cylindrical or other suitable shape is set specially, the magnetic line of force of motor main field forms closed magnetic circuits via magnetic guiding loop and armature core and two air gaps.And magnetic guiding loop adopts rational structure to fix the relative rigging position of overall plastic casing and magnetic guiding loop with the part of overall plastic casing.
3) compare with the traditional type miniature magnetic DC motor: promptly except cooling fan is not set like that on rotor part with the traditional type miniature magnetic DC motor; for those Fraquent starts; the use occasion of shutting down; for example the electric household sewing machine is such; be provided with cooling fan on the motor rotor part of the present utility model; make motor rotor obtain the cooling of forced draft in the running; the rotor winding temperature rise and the casing temperature rise of motor are minimized; improve performance, prolonged the useful life of motor.
The utility model can replace the single-phase series motor that is always using in the electric household sewing machine, it is energy-conservation, material-saving, good performance, lower manufacturing cost has good economic benefit and social benefit undoubtedly, and this overall plastic shell permanent magnet direct current motor also can be applicable to as technology such as household electrical appliance neck city.
Description of drawings
Fig. 1 is a traditional type iron-clad permanent magnet direct current motor basic block diagram;
Fig. 2 is the B-B cutaway view of Fig. 1;
Fig. 3 is the overall plastic shell permanent magnet direct current motor of a two-part of the present utility model basic block diagram;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is a magnetic guiding loop component diagram in the overall plastic shell permanent magnet direct current motor of two-period form;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the overall plastic shell permanent magnet direct current motor of a syllogic of the present utility model basic block diagram;
Fig. 8 is the B-B cutaway view of Fig. 7;
Fig. 9 is the middle cabinet parts figure of the overall plastic shell permanent magnet direct current motor of syllogic;
Figure 10 is the left view of Fig. 9.
Among the figure: 1, front end housing, 2, the brush plate parts, 3, support, 4, watt shape permanent magnetic steel, 5, rotor part, 6, oiliness bearing, 7, fore shell, 8, magnetic guiding loop, 9, back cover, 10, trip bolt, 11, fan, 12, screw, 13, screw hole pin, 14, front housing, 15, middle casing, 16, back cabinet.
Embodiment
Embodiment 1:
As shown in Figure 3, Figure 4, be the enforcement illustration of the overall plastic shell permanent magnet direct current motor of two-part of the present utility model basic structure.Two-part embodiment of the present utility model mainly is made of institutes such as fore shell 7, brush plate parts 2, magnetic guiding loop 8, back cover 9, rotor part 5, trip bolt 10, oiliness bearing 6, watt shape permanent magnetic steels 4.The external cylindrical surface of magnetic guiding loop 8 and fore shell 7, the inner cylinder face of back cover 9 is a mating surface, brush plate parts 2 are fixed on two screw hole pin 13 on the magnetic guiding loop 8 by screw 12, Fig. 5, Fig. 6 is magnetic guiding loop 8 and two slices watts of magnetic guiding loop component diagram that shape permanent magnetic steel 4 constitutes among Fig. 3, the main field magnetic line of force of motor is by the N utmost point, two slices watts of shape permanent magnetic steels that S is extremely relative form, the closed path of its circulation is shown in the dotted line among Fig. 6, magnetic guiding loop 8 is necessary parts of motor main field magnetic circuit as seen from the figure, if do not establish magnetic guiding loop 8, then motor external magnetic circuit magnetic resistance becomes very big, it is very little that main flux becomes, so that motor can't normally move.
Embodiment 2:
As Fig. 7, shown in Figure 8, be the enforcement illustration of the overall plastic shell permanent magnet direct current motor of syllogic of the present utility model basic structure.The utility model syllogic embodiment mainly is made of institutes such as front housing 14, brush plate parts 2, middle casing 15, magnetic guiding loop 8, trip bolt 10, rotor part 6, back cabinet 16, oiliness bearing 6, watt shape permanent magnetic steels 4.Magnetic guiding loop 8 can be used as inserts and makes middle casing 15 by injection molding process, the inner cylinder face of magnetic guiding loop 8 is pasted watt shape permanent magnetic steel 4, middle casing 15, magnetic guiding loop 8,2 slices watts of shape permanent magnetic steels 4 form a middle cabinet parts, and magnetic guiding loop 8 also can directly not be pressed into middle casing 15 inner cylinder faces as inserts.On the screw hole pin 13 during brush plate parts 2 are fixed on by 2 screws 12 on the casing 15.The closed-loop path of the motor main field magnetic line of force is the same with two-part structure chart 6.In the space that two slices watts of shape permanent magnetic steels 4 of cabinet parts were surrounded during rotor part 6 inserted, make the commutator face of cylinder maintenance excellent contact on two brushes and the rotor part 6 on the brush plate parts 2.Close front housing 14 and back cabinet 16, this forward and backward casing all has seam to cooperate with middle casing 15, and to guarantee the axiality of motor, this moment, rotor two side shafts inserted in the oiliness bearing 6.Trip bolt 10 pass front housing 14, back cabinet 16 and in the neutral gear between two slices watts of shape permanent magnetic steels 4 in the cabinet parts, by the fastening front housing 14 of nut, middle casing 15, back cabinet 16, just formed a complete motor.The shell of motor is made of front housing 14, middle casing 15, back cabinet 16, and shell has three sections, so the name three stage structure.Because front housing 14, middle casing 15, back cabinet 16 make motor casing have the double insulation structure by the good plastic injection-moulded formation of insulation property.When positive and negative brush fed direct current, electric current in the armature winding and motor main field interacted and produce electromagnetic torque, make motor operation.
The utility model can also be placed on trip bolt on the excircle of casing, can be with 3 screws or 4 screws, and fastening more firm, but overall dimension can be big.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection range of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection range of the present utility model.
Claims (4)
1, a kind of overall plastic shell permanent magnet direct current motor of electric household use in sewing machine, be included in permanent magnet direct current motor housing inner chamber two slices watts of shape permanent magnetic steels of symmetric arrangement are housed, the brush plate parts, rotor part, rotor part is positioned at the space that two slices watts of shape permanent magnetic steels surround, and the rotating shaft two end supports is on oiliness bearing; It is characterized in that: described housing is overall plastic casing, link into an integrated entity with trip bolt (10) by fore shell (7) and back cover (9), magnetic guiding loop (8) is set in the housing, magnetic guiding loop (8) inwall is bonded with two slices watts of shape permanent magnetic steels (4) of symmetric arrangement, and brush plate parts (2) are fixed on two screw hole pin (13) that magnetic guiding loop (8) one ends stretch out.
2, the overall plastic shell permanent magnet direct current motor of a kind of electric household use in sewing machine according to claim 1 is characterized in that: on the axle of rotor part one side fan (11) is housed also.
3, a kind of overall plastic shell permanent magnet direct current motor of electric household use in sewing machine, be included in permanent magnet direct current motor housing inner chamber two slices watts of shape permanent magnetic steels of symmetric arrangement are housed, the brush plate parts, rotor part, rotor part is positioned at the space that two slices watts of shape permanent magnetic steels surround, and the rotating shaft two end supports is on oiliness bearing; It is characterized in that: described housing is overall plastic casing, link into an integrated entity with trip bolt (10) by front housing (14), middle casing (15) and back cabinet (16), in the middle casing (15) magnetic guiding loop (8) is set, magnetic guiding loop (8) inwall is bonded with two slices watts of shape permanent magnetic steels (4) of symmetric arrangement, and brush plate parts (2) are fixed on interior two the screw hole pin (13) of middle casing (15) one ends.
4, the overall plastic shell permanent magnet direct current motor of a kind of electric household use in sewing machine according to claim 3 is characterized in that: on the axle of rotor part one side fan (11) is housed also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106305 CN2935610Y (en) | 2006-08-02 | 2006-08-02 | Overall plastic shell permanent-magnet DC motor for household electric seamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106305 CN2935610Y (en) | 2006-08-02 | 2006-08-02 | Overall plastic shell permanent-magnet DC motor for household electric seamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2935610Y true CN2935610Y (en) | 2007-08-15 |
Family
ID=38352293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620106305 Expired - Fee Related CN2935610Y (en) | 2006-08-02 | 2006-08-02 | Overall plastic shell permanent-magnet DC motor for household electric seamer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2935610Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901464A (en) * | 2015-05-28 | 2015-09-09 | 湖州正豪电器科技有限公司 | Special motor structure for snow blower |
-
2006
- 2006-08-02 CN CN 200620106305 patent/CN2935610Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901464A (en) * | 2015-05-28 | 2015-09-09 | 湖州正豪电器科技有限公司 | Special motor structure for snow blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20100802 |