CN2899245Y - High-precision electric motor - Google Patents
High-precision electric motor Download PDFInfo
- Publication number
- CN2899245Y CN2899245Y CN 200620017452 CN200620017452U CN2899245Y CN 2899245 Y CN2899245 Y CN 2899245Y CN 200620017452 CN200620017452 CN 200620017452 CN 200620017452 U CN200620017452 U CN 200620017452U CN 2899245 Y CN2899245 Y CN 2899245Y
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- stator core
- stator
- core
- rotor core
- rotor
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Abstract
The utility model discloses a high-precision electric motor, which comprises a stator, a rotor, an axis, a forward end cap and a backward end cap fixed with the stator, in which the rotor iron core has an abrased outer circle, the stator iron core has also an abrased outer circle, an inner hoe and two end caps, the rotor iron core is clipped into the inner hole of the stator iron core, the pressing diameter of the stator iron core inner hole before abrasion is equal to the pressing outer diameter of the outer circle of the rotor iron core before abrasion. The axis of the electric motor is directly pressed into the axis hole of the rotor iron core and matched compactly with the axis hole of the rotor iron core with whole contact. The stator iron core and rotor iron core of the utility model have a high machining precision, further guarantee the same axis degree and cylinder degree in assembling, reducing the power loss and the operation noise and temperature increase, and prolongs the life-span and reduces the operation cost.
Description
Technical field
The utility model relates to motor, more particularly, relates to a kind of motor that has than high-axiality and cylindricity.
Background technology
Motor manufacturing industry production technology for a long time all is: by designing requirement with stamping forming stator core steel disc or rotor core steel disc according to the rules folded being buckled together of quantity form stator core or rotor core, and the excircle and the endoporus of stator core or rotor core are all no longer done any machining, thereby low precision, tolerance are big, when motor is assembled, can not carry out precision adjustment to fit clearance, thereby cause motor axiality, cylindricity mismatch error big, cause long-standing abuses such as the motor power (output) loss is big, noise is big to be difficult to eliminate.Even the higher motor of accurate rank also just carries out turning processing to the excircle of rotor core, the improvement of quality of fit is also very limited.
In the existing technology, the relative position place punching press four ribs of rotor core is installed in the rotating shaft that certain degree of hardness is arranged usually, the relative position embossing of rotor core perhaps is installed in rotating shaft, to increase the diameter of rotating shaft, for example, if the diameter of rotating shaft is 8mm, the diameter at floating screed or embossing position is 8.2mm in the rotating shaft.Such processing makes when rotating shaft is mounted in the rotor core shaft hole, can and the rotor core shaft hole between a tight fit is arranged.But the disadvantage of this PROCESS FOR TREATMENT is, when motor torsion is big, forms rotor core easily and centers on the rotating shaft rotation and the motionless phenomenon of rotating shaft, reduces the durability of motor.
In addition, in the existing technology, the end cap of motor mostly leans against on the end face of stator core and fixes with stator core, and the coaxial accuracy of the dead eye between the front and rear cover is not high, thereby after causing assembling, the running track of rotor core be an ellipse, loss power.
Therefore, though existing manufacturing process handling ease and processing cost are low, product can only be competent at general requirement, is merely able to use in general environment or position.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned deficiency of prior art, provides the high-precision motor after a kind of improvement, improves the machining accuracy of stator core, rotor core, improves power of electric motor factor and durability.
The technical scheme that its technical problem that solves the utility model adopts is: propose a kind of high-precision motor, comprise stator, rotor, the rotating shaft that is assembled together and former and later two end caps that are fixed together with stator, described rotor core has the excircle through grinding, described stator core also has excircle, endoporus and two end faces through grinding respectively, described rotor core is enclosed within the endoporus of described stator core, and the endoporus of described stator core grinds the preceding punching press external diameter of excircle grinding that preceding punching press diameter equals described rotor core.
In the above-mentioned high-precision motor, described rotor core is integral by a plurality of round rotor punching riveteds.
In the above-mentioned high-precision motor, described stator core is integral by a plurality of circular stator punchings and two plate shapes that the are superimposed upon two ends respectively thick steel disc riveted consistent with described stator punching, and the thickness of described thick steel disc is more than or equal to 0.3mm.
In the above-mentioned high-precision motor, the depth of parallelism of two end faces of described stator core is smaller or equal to 0.008mm.
In the above-mentioned high-precision motor, the air gap between the endoporus that the excircle that the process of described rotor core is ground and the process of described stator core are ground is smaller or equal to 0.175mm.
In the above-mentioned high-precision motor, described rotating shaft directly is pressed in the shaft hole of rotor core, is the full tight fit that contacts with the shaft hole of described rotor core.
In the above-mentioned high-precision motor, described rotating shaft diameter is than the little 0.015mm at the most of shaft hole internal diameter of described rotor core.
In the above-mentioned high-precision motor, described end cap comprises bearing pedestal and stator support portion, the hollow cylindrical lower end of described stator support portion is held on the external peripheral surface of described stator core, inboard, described hollow cylindrical lower end is provided with step-like seam, is against on the end face of described stator core.
In the above-mentioned high-precision motor, described stator core and former and later two end caps of being held in described stator core two ends are by screw together.
In the above-mentioned high-precision motor, running in bearings in the bearing pedestal of described end cap, the inside and outside both sides of described bearing pedestal are respectively equipped with bearing cap, described bearing are clamped on described bearing pedestal by screw.
Implement high-precision motor of the present utility model, have following beneficial effect: motor of the present utility model is improved existing technology, the external circumference of grinding technique is all adopted in the processing of stator core and rotor core, interior sky and/or end face grind respectively, and simultaneously to stator core, rotor core, the structure of end cap is improved, so stator core, rotor core has very high machining accuracy, and then have higher axiality and a cylindricity when having guaranteed assembling, reduced power loss, running noise and temperature rise have been lowered, prolong useful life, and therefore reduced operating cost.The every technical indicator of motor of the present utility model all significantly is better than the motor of current technology processing and manufacturing, can be in the motor of common process manufacturing can't be worked the environment that maybe can't work long hours operate as normal, the for example motor of electric automobile use, and especially suitable precision motor.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of an embodiment of the utility model motor;
Fig. 2 is the end view of the stator core among embodiment of the utility model;
Fig. 3 is the end view when stator core and rotor core are assembled together among embodiment of the utility model;
Fig. 4 is the end view of the stator core of prior art;
Fig. 5 is the perspective view of the stator core among embodiment of the utility model;
Fig. 6 is the side schematic view of the stator core before undressed;
Fig. 7 is the side schematic view of the stator core after process is ground among embodiment of the utility model;
Fig. 8 is the perspective view of the end cap of prior art;
Fig. 9 is the assembling schematic diagram of motor in the prior art;
Figure 10 is the perspective view of end cap among embodiment of the utility model;
Figure 11 is the perspective view of another angle of end cap shown in Figure 10.
Embodiment
The related motor of the utility model comprises electromagnetic motor and permanent magnet motor.The stator core and the rotor core of electromagnetic motor combine by steel disc; One of them is permanent magnet for the stator core of permanent magnet motor or rotor core, and another one is combined by steel disc.Below will be that example describes with the electromagnetic motor to introduction of the present utility model.
In general, motor mainly by stator, rotor, rotating shaft and end cap (in some motor, for example in the series-wound motor, described end cap is called support again, therefore the end cap in following the description comprises support) constitute, wherein stator comprises stator core and stator winding, and rotor comprises rotor core and rotor winding.Because of the utility model does not relate to winding to the improvement of motor, so stator winding and rotor winding are not provided detailed description among the application.Fig. 1 is the structural representation of an embodiment of the utility model motor.As shown in Figure 1, this motor mainly comprises rotating shaft 50, rotor core 20, stator core 30 and front end housing 10 and the rear end cap 40 (winding does not illustrate in the drawings) that is assembled together.
The concrete structure of stator core 30 and rotor core is integral by a plurality of punching stacks and riveted respectively as shown in Figures 2 and 3.The utility model is after riveted, formation stator core or rotor core integral body are finished in the punching of stator core 30 or rotor core 20, according to different need grinding end face, excircle and/or endoporus respectively, very high axiality and cylindricity are arranged self to guarantee stator core 30 or rotor core 20 with precision grinder.As shown in Figure 2, the stator core 30 that is made of a plurality of circular stator punchings is along being evenly distributed with a plurality of rivet holes 32 on the circumference, with a plurality of closing-ups together, the quantity of rivet is adjusted with the variation of thickness with the external diameter size that distributes according to stator core 30, make the punching of forming stator core 30 closely cooperate together, form an integral body relatively.The center of stator core 30 is provided with endoporus 33, is used to entangle rotor core 20.In addition, also be provided with equally distributed a plurality of screw hole 31, be used for and front and rear cover 10 and 40 fixing at the same position place of each punching of stator core.After a plurality of stator punching riveteds are become stator core, the utility model becomes whole stator core to carry out attrition process to riveted, mainly comprise: former and later two end faces to stator core carry out plane lapping, make the depth of parallelism of two end faces in front and back of stator core be no more than 0.008mm; Endoporus to stator core carries out interior circle grinding, increases the cylindricity of endoporus circumference, reduces the cylindricity deviation of stator core endoporus; Excircle to stator core carries out cylindrical lapping, reduce the cylindricity deviation of stator core excircle, so just can improve the axiality of stator core excircle and endoporus and the perpendicularity of formed cylinder of whole stator core excircle and stator core front/rear end.For the ease of utilizing existing cylindrical grinder and internal grinder that the excircle and the endoporus of stator core are closely ground, stator punching of the present utility model periphery is complete circle, with respect to traditional stator core configuration design shown in Figure 4, stator core of the present utility model has higher machining accuracy like this.Because the natural law of machining, the inevitable machining accuracy of circumference to foreign round of the discontinuity of traditional stator core stamping sheet cylindrical has very bad influence, does not have the processing precise degree height of circular profile design.
By prior art as can be known, the punching of forming stator core normally is stamped to form with the thick package steel band of 0.3-3mm, though carry out smoothly through straight device, each sheet punching still has certain radian, less than fully not in one plane.As shown in Figure 5 and Figure 6, after a plurality of punchings rivet together by certain thickness, when carrying out attrition process with the correction flatness as if the end face to stator core, because the plane deviation is bigger, the thickness of punching self may not enough surplus carry out attrition process (especially obvious during the punching thinner thickness).Therefore, as shown in Figure 7, respectively superpose on former and later two end faces of stator core thick steel disc more than a slice 0.3mm (concrete thickness is adjusted according to the design of stator punching diel, thickness, external diameter and the punching glacing flatness of punching self) and become stator core integral body with a plurality of punching riveteds of the utility model is carrying out aforesaid various attrition process then to stator core.Stator core thickness can be increased like this so that carry out end surface grinding processing, tightness behind the stator core riveted and the stability after the processing can be increased again.
Equally, rotor core of the present utility model is integral by a plurality of rotor punchings stacks and riveted.As shown in Figure 3, rotor core 20 is provided with shaft hole 22 and circumferential a plurality of rivet hole 21 at center, the quantity of rivet hole 21 and distribution are adjusted with the variation of thickness according to the external diameter size of rotor core 20, make the punching of forming rotor core 20 closely cooperate together, form an integral body relatively by rivet.After a plurality of rotor punching riveteds were become rotor core, the utility model utilized cylindrical grinder that the excircle of rotor core is carried out attrition process, to improve the dimensional accuracy of rotor core.
In the existing production technology, the diameter of bore of stator core and the outside diameter of rotor core generally differ 0.7-1mm, if the tolerance value between the two is 0, rotor core can't be put in the stator core endoporus during assembling; If tolerance value is lower than 0.7mm, have iron filings during punching press again and produce, mold damage is also made troubles to batch process easily.The stator core after the utility model improves and the assembling of rotor core are as shown in Figure 3, stator punching of the present utility model and rotor punching size when punching press (for example adopts 0 pair 0 design, if the diameter of bore of stator punching is 52mm during punching press, then the external diameter of rotor punching is similarly 52mm), after by above-mentioned attrition process stator core endoporus and rotor core excircle being ground then, stator core and the rotor core air gap between the two reduces to minimum size, be that air-gap separation can be smaller or equal to 0.175mm, so just, can increase the torsion of motor, improve power factor.For example, when the punching press diameter was 52mm, after grinding, the diameter of bore of stator core was 52.2mm, and the external diameter of rotor core is 51.85mm.
It is the stainless steel material of SUS420J2 that the utility model shaft of motor can adopt model, after Overheating Treatment, reach the hardness of HRC45-50, after process fine finishining, the scale error end to end of whole rotating shaft is no more than 0.003mm, and the beating degree of excircle is no more than 0.008mm.During assembling, rotating shaft directly is pressed in the shaft hole of rotor core, the external peripheral surface of rotating shaft is contacted fully with the shaft hole surface of rotor core, reach the tight fit of full contact, so just, can bear very big torsion, the motionless situation of rotor rotation rotating shaft can not occur, improve the durability of motor because of torsion is excessive.Generally, when the elasticity between the shaft hole of rotating shaft and rotor core during smaller or equal to 0.015mm, i.e. the diameter of rotating shaft just can reach the tight fit of above-mentioned full contact during than the little 0.015mm at the most of the shaft hole internal diameter of rotor core.
Fig. 8 and Fig. 9 are the perspective view and the assembling schematic diagrames of a kind of end cap in the prior art.Two part circumference contacted with the end face of stator core about the general lower end of existing end cap had only, and stability is not high, and is yielding, and the axiality of the dead eye of former and later two end caps is difficult to be guaranteed.The utility model improves the structure of former and later two end caps, is the perspective view of front end housing 10 as shown in Figure 10 and Figure 11.This is stated end cap and comprises bearing pedestal 13 and stator support portion 12.The lower end of stator support portion 12 is a hollow cylindrical, and is provided with step-like seam 15 in the inboard of this hollow cylinder, and the thickness of this hollow cylinder and the degree of depth of seam can be adjusted according to the external diameter of stator core, the factors such as size of end cap.Front end housing 10 also is provided with a plurality of and the corresponding screw hole 16 of stator core in the position of seam 15.During assembling, front end housing 10 is held on the external peripheral surface of stator core 30 by the hollow cylindrical lower end, inboard step-like seam 15 is against on the end face of stator core 30, and tightens together by the screw hole on the seam 15 16 and stator core and rear end cover screw.End cap after the utility model improves, is the datum mark location with stator core through the excircle after grinding, front and rear cover is held on the excircle of stator core, makes front and rear cover and stator core three's axiality be guaranteed, and can have very high coaxial precision.In addition, the utility model also improves the location that covers bearing, opposite end.As shown in the figure, running in bearings and rotating shaft in the bearing pedestal 13 on the front end housing 10, the inside and outside both sides of bearing pedestal 13 are respectively equipped with bearing cap 14, by screw on bearing pedestal 13, thereby bearing is clamped between two bearing caps 14 from end face.When the axiality of rotating shaft and bearing is not enough, can finely tune by the position of adjusting the two bearings lid.Rear end cap 40 has adopted the structural design identical with front end housing 10, does not repeat them here.
The assembling of the motor after the utility model improves at first, decide the punching riveted with a plurality of commentaries on classics and is formed rotor core as shown in Figure 1, the thick steel disc riveted formation stator core that a plurality of stator punchings and two ends are superposeed respectively.Next, according to the certain precision demand, use precision grinder that the excircle of rotor core and two ends end face, excircle and the endoporus of stator core are ground, and then carry out the assembling of motor.During assembling, rotating shaft 50 directly is pressed in the shaft hole of the rotor core 20 after process is ground, makes rotating shaft 50 be the full tight fit that contacts with the shaft hole of rotor core 20; Then rotor core 20 is enclosed within the endoporus of stator core 30, because adopt 0 pair 0 design between the internal diameter of the diameter of rotor core and stator core endoporus, through grinding air gap between the latter two smaller or equal to 0.175mm; Then, hollow cylindrical lower end with front end housing 10 and rear end cap 40 is held on the external peripheral surface at stator core 30 two ends respectively, step-like seam 15 on the end cap is against on the end face of stator core, and by screw stator core and former and later two end caps is fixed together.
More than be that example has been described in detail various improvement of the present utility model with the electromagnetic motor.Above-mentioned improvement of the present utility model is equally applicable to permanent magnet motor.For example, when stator core is that permanent magnet and rotor core are when being steel disc, after magnet that constitutes stator core and shell bonding, according to preceding method excircle and two end faces of shell are carried out cylindrical lapping and plane lapping, and grind with the endoporus of internal grinder to this stator core; The processing of rotor core is identical with above-mentioned electromagnetic motor.Again for example,, also can carry out attrition process to the appropriate section of stator core, rotor core, improve its precision according to the method for aforementioned electromagnetic motor when stator core is steel disc and rotor core when being permanent magnet.More than architecture advances of Jie Shaoing and assembly method are applicable to permanent magnet motor too.
The utility model can be implemented with other different embodiment under the situation that does not depart from main spirit and feature, and therefore, the above embodiments are by way of example to explanation of the present utility model, and it should be considered as restriction of the present utility model.Any this area those of ordinary skill, any modification and the replacement done in not breaking away from design of the present utility model and scope all should be included within the protection range of the present utility model.
Claims (10)
1, a kind of high-precision motor, comprise stator, rotor, the rotating shaft that is assembled together and former and later two end caps that are fixed together with stator, it is characterized in that, described rotor core has the excircle through grinding, described stator core also has excircle, endoporus and two end faces through grinding respectively, described rotor core is enclosed within the endoporus of described stator core, and the endoporus of described stator core grinds the preceding punching press external diameter of excircle grinding that preceding punching press diameter equals described rotor core.
2, high-precision motor according to claim 1 is characterized in that, described rotor core is integral by a plurality of round rotor punching riveteds.
3, high-precision motor according to claim 1, it is characterized in that, described stator core is integral by a plurality of circular stator punchings and two plate shapes that the are superimposed upon two ends respectively thick steel disc riveted consistent with described stator punching, and the thickness of described thick steel disc is more than or equal to 0.3mm.
4, high-precision motor according to claim 1 is characterized in that, the depth of parallelism of two end faces of described stator core is smaller or equal to 0.008mm.
5, high-precision motor according to claim 1 is characterized in that, the air gap between the endoporus that the excircle that the process of described rotor core is ground and the process of described stator core are ground is smaller or equal to 0.175mm.
6, high-precision motor according to claim 1 is characterized in that, described rotating shaft directly is pressed in the shaft hole of rotor core, is the full tight fit that contacts with the shaft hole of described rotor core.
7, high-precision motor according to claim 6 is characterized in that, described rotating shaft diameter is than the little 0.015mm at the most of shaft hole internal diameter of described rotor core.
8, high-precision motor according to claim 1, it is characterized in that, described end cap comprises bearing pedestal and stator support portion, the hollow cylindrical lower end of described stator support portion is held on the external peripheral surface of described stator core, inboard, described hollow cylindrical lower end is provided with step-like seam, is against on the end face of described stator core.
9, high-precision motor according to claim 8 is characterized in that, described stator core and former and later two end caps of being held in described stator core two ends are by screw together.
10, high-precision motor according to claim 8 is characterized in that, running in bearings in the bearing pedestal of described end cap, and the inside and outside both sides of described bearing pedestal are respectively equipped with bearing cap, described bearing are clamped on described bearing pedestal by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017452 CN2899245Y (en) | 2006-06-14 | 2006-06-14 | High-precision electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017452 CN2899245Y (en) | 2006-06-14 | 2006-06-14 | High-precision electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899245Y true CN2899245Y (en) | 2007-05-09 |
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ID=38074576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620017452 Expired - Lifetime CN2899245Y (en) | 2006-06-14 | 2006-06-14 | High-precision electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899245Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299596A (en) * | 2010-06-24 | 2011-12-28 | 谢杨辉 | Multi-power motor and assembly method thereof |
| CN110918817A (en) * | 2019-10-29 | 2020-03-27 | 无锡庆新封头制造有限公司 | Thin-wall end socket drum pressing forming method |
| CN112713672A (en) * | 2019-10-25 | 2021-04-27 | 佛山市威灵洗涤电机制造有限公司 | Motor and assembly structure thereof |
-
2006
- 2006-06-14 CN CN 200620017452 patent/CN2899245Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299596A (en) * | 2010-06-24 | 2011-12-28 | 谢杨辉 | Multi-power motor and assembly method thereof |
| CN112713672A (en) * | 2019-10-25 | 2021-04-27 | 佛山市威灵洗涤电机制造有限公司 | Motor and assembly structure thereof |
| CN110918817A (en) * | 2019-10-29 | 2020-03-27 | 无锡庆新封头制造有限公司 | Thin-wall end socket drum pressing forming method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090729 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |