CN109617268B - Stepping motor - Google Patents
Stepping motor Download PDFInfo
- Publication number
- CN109617268B CN109617268B CN201910074779.4A CN201910074779A CN109617268B CN 109617268 B CN109617268 B CN 109617268B CN 201910074779 A CN201910074779 A CN 201910074779A CN 109617268 B CN109617268 B CN 109617268B
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- Prior art keywords
- end cover
- stator
- bearing
- stop block
- mounting platform
- 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.)
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- 238000004804 winding Methods 0.000 claims abstract description 29
- 238000009434 installation Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/08—Insulating casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to a stepping motor, which comprises a stator assembly, a rotor assembly, a front end cover and a rear end cover; the stator assembly comprises a stator, enamelled wires and insulating end covers, wherein the legs of the insulating end covers are embedded into the winding grooves of the stator; the enameled wires are wound on the insulating end cover to form winding groups of each magnetic pole of the stator; the rotor assembly comprises a rotor sheet, magnetic steel and a rotating shaft; the two ends of the rotating shaft are respectively supported by a bearing arranged in the bearing chamber of the front end cover and a bearing arranged in the bearing chamber of the rear end cover; the front end cover is provided with a first installation platform protruding outwards, the inner side of the first installation platform is provided with a spring pad accommodating chamber for accommodating a spring washer, the spring pad accommodating chamber is communicated with a bearing chamber positioned on the front end cover, and the output end of the rotating shaft sequentially penetrates through a bearing positioned on the bearing chamber of the front end cover, the spring washer positioned on the spring pad accommodating chamber and a shaft outlet hole on the first installation platform and then stretches out. The stepping motor can improve the output torque on the premise of not increasing the overall size.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stepping motor.
Background
The stepper motor is an open loop control motor which converts an electric pulse signal into angular displacement or linear displacement. The stepping motor is used as an executing element, is one of key products of electromechanical integration, and is widely applied to various automatic control systems. With the development of microelectronics and computer technology, the demand of stepper motors is increasing, and the stepper motors are applied to various national economy fields.
With the development of the age, various products are changed to a small and exquisite route, and most products requiring a power system are reserved for a motor to be installed in a more limited space, but the requirement on output torque is higher.
Disclosure of Invention
The invention aims to provide a stepping motor. The stepping motor improves the output torque on the premise of not increasing the overall size so as to solve the problem that the installation space of the motor is more and more limited, but the requirement on the output torque is higher and higher.
The invention realizes the aim through the following technical scheme:
a stepping motor comprises a stator assembly, a rotor assembly, a front end cover and a rear end cover;
The stator assembly comprises a stator, enamelled wires and insulating end covers, wherein the legs of the insulating end covers are embedded into the winding grooves of the stator; the enameled wires are wound on the insulating end cover to form winding groups of each magnetic pole of the stator;
the rotor assembly comprises a rotor sheet, magnetic steel and a rotating shaft; the two ends of the rotating shaft are respectively supported by a bearing arranged in the bearing chamber of the front end cover and a bearing arranged in the bearing chamber of the rear end cover;
The front end cover is provided with a first installation platform protruding outwards, the inner side of the first installation platform is provided with a spring pad accommodating chamber for accommodating a spring washer, the spring pad accommodating chamber is communicated with a bearing chamber positioned on the front end cover, and the output end of the rotating shaft sequentially penetrates through a bearing positioned on the bearing chamber of the front end cover, the spring washer positioned on the spring pad accommodating chamber and a shaft outlet hole on the first installation platform and then stretches out.
In one embodiment of the invention, the insulating end shield comprises a front insulating end shield and a rear insulating end shield; the front insulating end cover and the rear insulating end cover comprise leg parts which are matched with the inner side surface of the winding groove of the stator and are clung to the inner side surface of the winding groove, and a baffle part positioned at one end of the stator, wherein the leg parts and the baffle part are integrally formed; the baffle part comprises a second mounting platform, an annular stop block formed by extending along the peripheral edge of the second mounting platform in the direction vertical to the second mounting platform, and an inner stop block positioned at the inner side of the annular stop block and the fixed end of which is connected with the second mounting platform; the second mounting platform is propped against the end face of the stator, and the annular stop block and the inner stop block are positioned at the outer side of the stator; the fixed end of the leg is connected with a second mounting platform, and an opening matched with the section shape of the foot is formed in the second mounting platform; the number of the legs of the front insulating end cover and the number of the inner stop blocks of the rear insulating end cover are the same as the number of the stator magnetic poles; the annular check block, the second mounting platform and the groove formed by the inner check block are winding spaces of the enamelled wires.
In one embodiment of the invention, the cross section of the annular stop block is regular polygon, and each corner of the annular stop block is provided with a wire column for guiding the enameled wire.
In one embodiment of the invention, the front end cap is provided with a barrier accommodating chamber for accommodating the barrier of the front insulating end cap, and the rear end cap is provided with a barrier accommodating chamber for accommodating the barrier of the rear insulating end cap.
In one embodiment of the invention, the free end of the annular stop is in the same plane as the free end of the inner stop, which plane is parallel to the second mounting platform.
In one embodiment of the invention, the rotor assembly further comprises a bushing sleeved on the rotating shaft and positioned between the bearing and the rotor sheet.
In one embodiment of the present invention, the protruding end of the rotating shaft is provided with a flat position.
In one embodiment of the present invention, the front end cover is further provided with two opposite mounting lugs, and screw holes are formed in the mounting lugs.
In one embodiment of the invention, the magnetic steel is N42 high magnetic energy product magnetic steel with the thickness of 0.8 mm; the step motor specification is 20 x 20.
The spring washer is arranged on the front end cover, so that the thickness of the rear end cover can be reduced, and the thickness of the front end cover can be kept unchanged on the premise of meeting the strength of the front end cover due to the fact that the thickness of the first mounting platform of the front end cover is fully utilized, and the thickness of the stator can be increased on the premise of keeping the overall size of the stepping motor unchanged, so that the output torque of the stepping motor is improved.
In one embodiment of the invention, the number of windings of each winding group is reduced, the height of the baffle part is reduced, and the thicknesses of the front end cover and the rear end cover are further reduced, so that the thickness of the stator can be increased on the premise of unchanged overall size of the stepping motor, and the output torque of the stepping motor is improved.
In one embodiment of the invention, N42 high magnetic energy product magnetic steel with the thickness of 0.8mm is selected, a spring washer is mounted on the front end cover in a matched manner, the number of windings of each winding group is reduced, the height of a baffle part is reduced, and the output force distance of a stepping motor with the specification of 20 multiplied by 20 can be increased to be twice as large as the original one.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a perspective view of a stepper motor according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a stepper motor according to an embodiment of the present invention;
FIG. 3 is a perspective view of a stator of a stepper motor according to an embodiment of the present invention;
FIG. 4 is a perspective view of a front insulating end shield of a stepper motor according to an embodiment of the present invention;
FIG. 5 is another perspective view of a front insulating end shield of a stepper motor according to an embodiment of the present invention;
FIG. 6 is a perspective view of a stepper motor according to a second embodiment of the present invention;
fig. 7 is a cross-sectional view of a stepper motor according to an embodiment of the present invention.
In the figure, 1, a front end cover; 2. a rear end cover; 3. a stator; 4. enamelled wires; 5. a leg portion; 6. a wire winding groove; 7. a magnetic pole; 8. a rotor sheet; 9. magnetic steel; 10. a rotating shaft; 11. a bearing; 12. a bushing; 13. a first mounting platform; 14. a spring washer; 15. a spring pad accommodating chamber; 16. a front insulating end shield; 17. a rear insulating end shield; 18. a second mounting platform; 19. an annular stop; 20. an inner stopper; 21. a wire post; 22. a barrier accommodating chamber; 23. a mounting ear; 24. screw holes. ;
Detailed Description
The present invention will be further described with reference to the drawings and examples for the purpose of facilitating understanding to those skilled in the art.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. It is to be understood that the terms "center," "upper," "lower," "top," "bottom," "inner," "outer," "left," "right," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless explicitly specified and limited otherwise, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Example 1
Referring to fig. 1 and 2, the stepping motor of the present embodiment includes a stator 3 assembly, a rotor assembly, a front end cover 1, and a rear end cover 2.
The stator 3 assembly comprises a stator 3, enameled wires 4 and insulating end covers with legs 5 embedded in winding grooves 6 of the stator 3; the enameled wires 4 are wound on the insulating end cover to form winding groups of the magnetic poles 7 of the stator 3.
The rotor assembly comprises a rotor sheet 8, magnetic steel 9 and a rotating shaft 10; both ends of the rotating shaft 10 are supported by bearings 11 mounted in the bearing 11 chamber of the front cover 1 and by bearings 11 mounted in the bearing 11 chamber of the rear cover 2, respectively. In this embodiment, the rotor assembly further comprises a bushing 12 sleeved on the rotating shaft 10 and located between the bearing 11 and the rotor sheet 8. Since the number of rotor plates 8 and bearings 11 is 2 in this embodiment, the number of bushings 12 is also 2. The protruding end of the rotating shaft 10 is provided with a flat position to improve the stability of installation and use.
The front end cover 1 is provided with a first installation platform 13 protruding outwards, the inner side of the first installation platform 13 is provided with a spring pad accommodating chamber 15 for accommodating a spring washer 14, the spring pad accommodating chamber 15 is communicated with a bearing 11 chamber positioned on the front end cover 1, and the output end of the rotating shaft 10 sequentially penetrates through the bearing 11 positioned on the bearing 11 chamber of the front end cover 1, the spring washer 14 positioned on the spring pad accommodating chamber 15 and the shaft outlet hole on the first installation platform 13 and then stretches out.
The spring washer 14 is arranged on the front end cover 1, so that the thickness of the rear end cover 2 can be reduced, and the thickness of the front end cover 1 can be kept unchanged on the premise of meeting the strength of the front end cover 1 due to the fact that the thickness of the first mounting platform 13 of the front end cover 1 is fully utilized, and the thickness of the stator 3 can be increased on the premise of keeping the overall size of the stepping motor unchanged, so that the output torque of the stepping motor is improved.
In this embodiment, the insulating end caps include a front insulating end cap 16, a rear insulating end cap 17. In the present embodiment, the front insulating end cover 16 is identical to the rear insulating end cover 17, and only the structure of the front insulating end cover 16 will be described in detail herein for simplicity of description. Referring to fig. 4 and 5, the front insulating end cover 16 includes a leg portion 5 that matches the inner side surface of the winding slot 6 of the stator 3 and is closely attached to the inner side surface of the winding slot 6, and a blocking portion located at one end of the stator 3, where the leg portion 5 and the blocking portion are integrally injection molded. The blocking part comprises a second mounting platform 18, an annular stop block 19 formed by extending along the peripheral edge of the second mounting platform 18 towards the direction perpendicular to the second mounting platform 18, and an inner stop block 20 positioned on the inner side of the annular stop block 19 and the fixed end of the inner stop block is connected with the second mounting platform 18. In this embodiment, the free end of the annular stop 19 is in the same plane as the free end of the inner stop 20, which is parallel to the second mounting platform 18, i.e. the free end of the annular stop 19 is at the same height as the free end of the inner stop 20. Referring to fig. 2, the second mounting platform 18 abuts against the end face of the stator 3, and the annular stop 19 and the inner stop 20 are located outside the stator 3. Referring to fig. 4 and 5, the fixed end of the leg 5 is connected with the second mounting platform 18, and an opening matching with the cross-sectional shape of the foot is formed on the second mounting platform 18. The number of the legs 5 and the number of the inner stoppers 20 of the front insulating end cover 16 are the same as the number of the poles 7 of the stator 3, and in this embodiment, the number of the legs 5, the number of the inner stoppers 20 and the number of the poles 7 of the stator 3 of the front insulating end cover 16 are 8. The grooves formed by the front insulating end cover 16, the annular stop block 19 of the rear insulating end cover 17, the second mounting platform 18 and the inner stop block 20 and the grooves formed on the inner side surfaces of the feet are winding spaces of the enamelled wires 4. In this embodiment, the cross section of the annular stop block 19 is regular octagon, and each corner of the annular stop block 19 is provided with a wire post 21 for guiding the enameled wire 4. Before the front insulation end cover 16 and the rear insulation end cover 17 are wound, the wire post 21 is higher than the plane where the free end of the annular stop block 19 is located so as to facilitate winding; after the winding of the front insulating end cover 16 and the rear insulating end cover 17 is completed, the wire post 21 needs to be trimmed so as not to be higher than the plane where the free ends of the annular stop blocks 19 are located.
Referring to fig. 2, the front end cover 1 is provided with a barrier accommodating chamber 22 for accommodating a barrier of the front insulating end cover 16, and the rear end cover 2 is provided with a barrier accommodating chamber 22 for accommodating a barrier of the rear insulating end cover 17. In this embodiment, the spacer accommodating chamber 22 is a regular octagonal accommodating groove, the depth of the groove is the same as the height of the annular stop block 19, and the height of the enameled wire 4 at the winding portion of the spacer is the same as the height of the annular stop block 19, so that the thickness of the front end cover 1 and the rear end cover 2 can be further reduced by reducing the winding number of the winding groups, and thus the thickness of the stator 3 can be increased on the premise of keeping the overall size of the stepper motor unchanged, and the output torque of the stepper motor can be further improved.
In the present embodiment, when the specification of the stepping motor is 20×20×20, and the magnetic steel 9 is N42 high magnetic energy product magnetic steel 9 with the thickness of 0.8mm, by attaching the spring washer 14 to the front cover 1 as described above, and reducing the number of windings of each winding group, the design of reducing the height of the baffle part (reducing the thickness of the front end cover 1 by 1.2mm, reducing the thickness of the rear end cover 2 by 3.8mm and increasing the thickness of the stator 3 by 5 mm) can increase the output force distance to be twice as much as the original one.
Example two
Fig. 6 and 7 show another embodiment of the stepping motor of the present invention. The stepping motor comprises a stator 3 assembly, a rotor assembly, a front end cover 1 and a rear end cover 2. In this embodiment, the structures of the stator 3 assembly, the rotor assembly and the rear end cap 2 are identical to those of the stepping motor of the first embodiment, and will not be described in detail herein.
In this embodiment, the front end cover 1 is substantially the same as the front end cover 1 of the stepping motor of the first embodiment, except that: the front end cover 1 is further provided with two opposite mounting lugs 23, and the two mounting lugs 23 are respectively positioned on the left side surface and the right side surface of the front end cover 1 relative to the view angle of fig. 6, and screw holes 24 are formed in the mounting lugs 23. The mounting hole of the front end cover 1 of a general stepper motor is universal with screw holes for fixing the front end cover 1, the stator 3 and the rear end cover 2 together through screws, and in order to ensure the mounting condition of a customer, the mounting hole of the front end cover 1 must be reserved with enough depth, which limits the thickness of the front end cover 1. In this embodiment, the mounting lug 23 with the screw hole 24 is additionally arranged, so that the thickness of the front end cover 1 can be reduced on the premise of meeting the mounting condition, the thickness of the stator 3 can be increased, and the output torque of the stepper motor can be further increased.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A stepper motor, characterized in that: the motor comprises a stator assembly, a rotor assembly, a front end cover and a rear end cover;
The stator assembly comprises a stator, enamelled wires and insulating end covers, wherein the legs of the insulating end covers are embedded into the winding grooves of the stator; the enameled wires are wound on the insulating end cover to form winding groups of each magnetic pole of the stator;
the rotor assembly comprises a rotor sheet, magnetic steel and a rotating shaft; the two ends of the rotating shaft are respectively supported by a bearing arranged in the bearing chamber of the front end cover and a bearing arranged in the bearing chamber of the rear end cover;
The front end cover is provided with a first installation platform protruding outwards, the inner side of the first installation platform is provided with a spring pad accommodating chamber for accommodating a spring washer, the spring pad accommodating chamber is communicated with a bearing chamber positioned on the front end cover, and the output end of the rotating shaft sequentially penetrates through a bearing positioned on the bearing chamber of the front end cover, the spring washer positioned in the spring pad accommodating chamber and an outlet shaft hole on the first installation platform and then stretches out;
The insulation end cover comprises a front insulation end cover and a rear insulation end cover; the front insulating end cover and the rear insulating end cover comprise leg parts which are matched with the inner side surface of the winding groove of the stator and are clung to the inner side surface of the winding groove, and a baffle part positioned at one end of the stator, wherein the leg parts and the baffle part are integrally formed; the baffle part comprises a second mounting platform, an annular stop block formed by extending along the peripheral edge of the second mounting platform in the direction vertical to the second mounting platform, and an inner stop block positioned at the inner side of the annular stop block and the fixed end of which is connected with the second mounting platform; the second mounting platform is propped against the end face of the stator, and the annular stop block and the inner stop block are positioned at the outer side of the stator; the fixed end of the leg is connected with a second mounting platform, and an opening matched with the section shape of the foot is formed in the second mounting platform; the number of the legs of the front insulating end cover and the number of the inner stop blocks of the rear insulating end cover are the same as the number of the stator magnetic poles; the annular check block, the second mounting platform and the groove formed by the inner check block are winding spaces of the enamelled wires.
2. The stepper motor of claim 1, wherein: the section of the annular stop block is regular polygon, and each corner of the annular stop block is provided with a wire column for guiding the enameled wire.
3. The stepper motor of claim 1, wherein: the front end cover is provided with a baffle part accommodating chamber for accommodating the baffle part of the front insulating end cover, and the rear end cover is provided with a baffle part accommodating chamber for accommodating the baffle part of the rear insulating end cover.
4. A stepper motor as defined in claim 3, wherein: the free end of the annular stop block and the free end of the inner stop block are located on the same plane, and the plane is parallel to the second mounting platform.
5. The stepper motor of claim 1, wherein: the rotor assembly further comprises a bushing sleeved on the rotating shaft and positioned between the bearing and the rotor sheet.
6. The stepper motor of claim 1, wherein: the extending end of the rotating shaft is provided with a flat position.
7. The stepper motor of claim 1, wherein: the front end cover is also provided with two opposite mounting lugs, and screw holes are formed in the mounting lugs.
8. The stepping motor according to any one of claims 1 to 7, wherein: the magnetic steel is N42 high magnetic energy product magnetic steel with the thickness of 0.8 mm; the step motor specification is 20 x 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074779.4A CN109617268B (en) | 2019-01-25 | 2019-01-25 | Stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074779.4A CN109617268B (en) | 2019-01-25 | 2019-01-25 | Stepping motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109617268A CN109617268A (en) | 2019-04-12 |
| CN109617268B true CN109617268B (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910074779.4A Active CN109617268B (en) | 2019-01-25 | 2019-01-25 | Stepping motor |
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| CN (1) | CN109617268B (en) |
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| CN109617268A (en) | 2019-04-12 |
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