CN203933319U - Motor - Google Patents
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- CN203933319U CN203933319U CN201420294041.1U CN201420294041U CN203933319U CN 203933319 U CN203933319 U CN 203933319U CN 201420294041 U CN201420294041 U CN 201420294041U CN 203933319 U CN203933319 U CN 203933319U
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- cutting apart
- motor
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Abstract
The utility model provides a kind of motor, and a kind of technology that reduces the leakage flux between housing and magnet is specifically provided.In the motor being formed by stator and rotor, described stator has and has the housing of round-ended cylinder shape and at least one rounded or circular-arc magnet of periphery, described housing consists of magnetic, medial surface and edge that described at least one magnet is fixed on described housing circumferentially have different magnetic poles, described rotor has axle and armature, described axle is supported to and can centered by the central axis of above downward-extension, rotates, described armature and described magnet are radially opposed across gap and be fixed on described axle, described magnet has at least two contact sites that contact with the bottom surface of described housing, and described magnet two described contact sites circumferentially between have and described bottom surface discontiguous noncontact portion, described noncontact portion comprises the lower axial end portion of boundary portion of the described magnetic pole of described magnet.
Description
Technical field
The utility model relates to the motor that a kind of medial surface at housing is fixed with magnet.
Background technology
There is a kind of motor that the magnet that has different magnetic poles along circumferential array is fixed on to the medial surface of housing all the time.At magnet, be fixed in the motor of medial surface of housing, the workability while magnet being installed in order to improve, mostly in situation by magnet butt housing bottom surface install.But, when housing is magnetic, because housing contacts with magnet, cause the flow through bottom surface of housing of the part of the magnetic flux that produced by magnet.The magnetic flux of bottom surface of housing of flowing through can not contribute to produce torque and be called leakage flux.Owing to producing leakage flux, cause the decline of torque, there is the problem of the performance reduction of motor.
And the technology of the leakage flux that reduces magnet for example disclosed in the flat 5-284709 communique of Japanese Publication.In Fig. 1, the Fig. 4 recording in the flat 5-284709 communique of Japanese Publication, the rear end face of pole piece and rotor yoke along portion's butt, two spacer butts of each of front end face and rotor case, thus pole piece is positioned and is held in the position of the base plate that leaves vertically shell.Therefore, can reduce the leakage flux from pole piece to base plate.
Utility model content
But, in above-mentioned document, the rear end face of pole piece and rotor yoke along portion at complete cycle butt.Therefore, at bearing surface, from pole piece, towards rotor yoke, produce leakage flux.Specifically, due to the magnetic flux flow of the boundary member of the magnetic pole of the rear end face of pole piece through the rotor yoke of institute's butt along portion, therefore can not contribute to the rotation of motor.Thus, in above-mentioned technology, yet there is the leeway of the reduction that improves leakage flux.
Therefore, the utility model completes in order to solve above-mentioned problem, its object is to be fixed with about the medial surface at housing the motor that magnet and housing bottom surface contact with magnet, a kind of leakage flux producing between the bottom surface of housing and the contact-making surface of magnet that is reduced in is provided, thereby can effectively applies the motor of magnetic flux.
The motor of exemplary the first execution mode of the application for being formed by stator and rotor, described motor is characterised in that, described stator has: have the housing of round-ended cylinder shape, it consists of magnetic; And at least one magnet, medial surface and edge that described at least one magnet is fixed on described housing circumferentially have different magnetic poles, and the periphery of described at least one magnet is rounded or circular-arc.Described rotor has: axle, and it is supported to and can centered by the central axis of above downward-extension, rotates; And armature, itself and described magnet are radially opposed across gap and be fixed on described axle.Described magnet has at least two contact sites that contact with the bottom surface of described housing, and, described magnet two described contact sites circumferentially between have and described bottom surface discontiguous noncontact portion.Described noncontact portion comprises the lower axial end portion of boundary portion of the described magnetic pole of described magnet.
Then, the motor of exemplary the second execution mode of the application for being formed by stator and rotor, described motor is characterised in that, described stator has: have the housing of round-ended cylinder shape, it consists of magnetic; And at least one magnet, medial surface and edge that described at least one magnet is fixed on described housing circumferentially have different magnetic poles, and the periphery of described at least one magnet is rounded or circular-arc.Described rotor has: axle, and it is supported to and can centered by the central axis of above downward-extension, rotates; And armature, itself and described magnet are radially opposed across gap.Described magnet contacts with the bottom surface of described housing, and described housing has the 3rd recess, and described the 3rd recess arrangement is the position by radially inner side in the lower axial end portion than the boundary portion of described magnetic pole, and described the 3rd recess caves in towards axial downside.
Then, the motor of exemplary the 3rd execution mode of the application for being formed by stator and rotor, described motor is characterised in that, described stator has: have the housing of round-ended cylinder shape, it consists of magnetic; And a plurality of magnet of cutting apart, describedly a plurality ofly cut apart that magnet is fixed on the medial surface of described housing and along circumferentially thering is different magnetic poles, and described a plurality of magnet of cutting apart is along being circumferentially circular-arc across gap configuration and periphery respectively.Described rotor has: axle, and it is supported to and can centered by the central axis of above downward-extension, rotates; And armature, its with described in cut apart magnet radially opposed across gap.The described magnet of cutting apart contacts with the bottom surface of described housing, and described housing has the second recess, and described the second recess caves in towards axial downside at the axial downside of described clearance portion.
According to the first exemplary execution mode, magnet contacts with the bottom surface of housing by contact site.Therefore, the bottom surface of housing contacts with the lower axial end portion part of magnet.And magnet has at least two contact sites, and the contact site of magnet circumferentially between have and bottom surface discontiguous noncontact portion.Because the lower axial end portion of the boundary portion of the magnetic pole at magnet disposes noncontact portion, there is leakage flux in the lower axial end portion that therefore can be reduced in magnet.
And according to the second exemplary execution mode, the bottom surface of housing contacts at complete cycle with the lower axial end portion of magnet.The bottom surface of housing has the 3rd recess, and described the 3rd recess arrangement is caving in by the position of radially inner side and towards axial downside than each lower axial end portion of the boundary portion of the magnetic pole of magnet.By the 3rd recess, can prevent the medial surface generation leakage flux at magnet.
And according to the 3rd exemplary execution mode, the bottom surface of housing contacts with a plurality of lower axial end portions of cutting apart magnet.And, cut apart magnet edge circumferentially across gap configuration.Housing has the second recess, and described the second recess caves in towards axial downside at the axial downside of clearance portion, thereby can be reduced in the lower axial end portion of magnet towards the leakage flux of adjacent magnet.
Accompanying drawing explanation
Fig. 1 is the cutaway view of the motor of execution mode 1 of the present utility model.
Fig. 2 is the stereogram of the stator of execution mode 1 of the present utility model.
Fig. 3 is the mobile figure that the magnetic flux in the stator of execution mode 1 is shown.
Fig. 4 is the mobile figure that the magnetic flux in the stator of execution mode 1 is shown.
Fig. 5 is the mobile figure that the magnetic flux in the stator of execution mode 1 is shown.
Fig. 6 is the enlarged drawing of the motor of execution mode 1.
Fig. 7 is the vertical view of the stator of execution mode 1.
Fig. 8 is the cutaway view of the motor of execution mode 2 of the present utility model.
Fig. 9 is the stereogram of the stator of execution mode 2 of the present utility model.
Figure 10 is the mobile figure that the magnetic flux in the stator of execution mode 2 is shown.
Figure 11 is the cutaway view of the motor of execution mode 3 of the present utility model.
Figure 12 is the stereogram of the stator of execution mode 3 of the present utility model.
Figure 13 is the mobile figure that the magnetic flux in the stator of execution mode 3 is shown.
Figure 14 is the mobile figure that the magnetic flux in the stator of execution mode 3 is shown.
Symbol description
1 motor;
2 housings;
21 sides;
22 bottom surfaces;
23 annular convex;
3 rotors;
31 axles;
32 commutators;
32a commutator segment;
33 armatures;
33a iron core;
33b winding;
33c tooth;
34 brushes;
351,352,353 cut apart magnet;
351a, 352a, 353a boundary portion;
351b, 352b, 353b lower axial end portion;
351c, 352c, the inside perimembranous in 353c footpath;
4 brush dishes;
41 base portions;
5a ball bearing;
5b ball bearing;
61 first recesses;
61a the first recess extension;
62 second recesses;
62a the second recess extension;
63 the 3rd recesses;
63a the 3rd recess extension;
64 the 4th recesses;
64a the 4th recess extension;
7 clearance portion.
Embodiment
Below, with reference to the accompanying drawings present embodiment is described.In addition, in this application, the direction that the central axis with rotor is parallel is called " axially ", and the direction of the central axis quadrature with rotor is called to " radially ", and the direction of the circular arc along centered by the central axis of rotor is called to " circumferentially ".And, in this application, take axially as shape and the position relationship of above-below direction explanation each several part.But, the definition of this above-below direction do not limit the related motor of the utility model in use towards.In addition, below be only illustration in illustrative in nature preferred embodiment, do not limit the utility model, its application thing or its purposes.
Fig. 1 is the general profile chart of the motor 1 of execution mode 1.Fig. 2 is for only illustrating housing 2 and the stereogram of cutting apart magnet 351,352,353.This motor 1 is cut apart the formations such as magnet 351,352,353, rotor 3 and brush dish 4 (lid shape parts) by housing 2, three.
Housing 2 has the bottom surface 22 of axial one end of side 21 cylindraceous and closure casing 2, and the axial other end of housing 2 is by opening.And 22 are formed with the annular convex 23 of protuberance in the form of a ring in bottom surface.
Cut apart magnet 351,352,353 respectively along circumferentially thering are two different magnetic poles for three.Respectively cutting apart the state that magnet 351,352,353 contacts with the bottom surface 22 with housing 2 and side 21 is fixed.The boundary portion 351a of magnetic pole, 352a, 353a (not shown 351a, 353a) refer to the part of the N utmost point/S utmost point conversion of cutting apart magnet 351,352,353.And the 351b of lower axial end portion, 352b, 353b (not shown 353b) refer to that the bottom surface 22 of cutting apart magnet 351,352,353 and housing 2 is in axial opposed part.And the inside perimembranous 351c in footpath, 352c, 353c (not shown 353c) refer to the medial surface of cutting apart magnet 351,352,353.
Rotor 3 consists of axle 31, commutator 32 and armature 33 etc.
Axle 31 is supported to respect to housing 2 and brush dish 4 and rotates freely by a pair of ball bearing 5a, 5b.Specifically, the part of the axial downside of axle 31 is provided in the first ball bearing 5a supporting of the inner side of annular convex 23, and the part of the axial upside of axle 31 is provided in the second ball bearing 5b supporting of the axial upside of brush dish 4.
Armature 33 has iron core 33a and a plurality of winding 33b.Specifically, iron core 33a forms by stacked steel plate, and has the iron core back of the toroidal that is fixed on axle 31 and from iron core back, be around a plurality of tooth 33c of radial extension.A plurality of winding 33b are by forming at each tooth 33c coiling conductor wire.A plurality of tooth 33c with the inner peripheral surface of cutting apart magnet 351,352,353 radially opposed across gap.
Commutator 32 is for to be fixed on the columned parts of axle 31 with the coaxial mode of axle 31.Outer peripheral face at commutator 32 is provided with a plurality of commutator segment 32a that are connected with the end of each winding 33b.
The one-body molded product that brush dish 4 is resin, and comprise discoideus base portion 41.This brush dish 4 is assembled in housing 2.
Outer surface at base portion 41 is equipped with the second ball bearing 5b, and the side-prominent root of the outer surface towards base portion 41 by the second ball bearing 5b bolster 31 divides.
The mode that brush 34 can slip with each commutator segment 32a of this commutator 32 with the end of radially inner side is supported on base portion 41.
The bottom surface 22 of housing 2 has the first recess 61 and the second recess 62.Contacting with the 351b of lower axial end portion, 352b, the 353b of cutting apart magnet 351,352,353 with the part the second recess 62 except the first recess 61 of the bottom surface 22 of housing 2.
In Fig. 2 to housing 2 with cut apart magnet 351,352,353 and be described in detail.Respectively cut apart magnet 351,352,353 along being circumferentially disposed at the side 21 of housing 2.And, respectively cut apart magnet 351,352,353 circumferentially between have clearance portion 7.The bottom surface 22 of housing 2 with cut apart the 351b of lower axial end portion separately of magnet 351,352,353,352b, 353b are local contacts.
The bottom surface 22 of housing 2 has the first recess 61, described the first recess 61 with respectively cut apart the 351b of lower axial end portion, the 352b of magnet 351,352,353, the opposed position of boundary portion 351a, 352a, 353a of the magnetic pole at 353b place, towards axial downside depression.Therefore, by bottom surface 22, there is the first recess 61, respectively cut apart the 351b of lower axial end portion, the 352b of magnet 351,352,353, boundary portion 351a, the 352a of the magnetic pole at 353b place, 353a do not contact with bottom surface 22.And bottom surface 22 has the second recess 62, described the second recess 62 caves in towards axial downside at the axial downside of each clearance portion 7.By the first recess 61, the second recess 62, can prevent respectively cutting apart the 351b of lower axial end portion of magnet 351,352,353, leakage flux occurs for 352b, 353b.About leakage flux, narrate in the back.
And the first recess 61, the second recess 62 all have extension 61a, the 62a extending towards axle center.Specifically, extension 61a than respectively cutting apart the inside perimembranous 351c in footpath, the 352c of magnet 351,352,353, boundary portion 351a, the 352a of the magnetic pole at 353c place, 353a Chao Zhou center by radially inner side extension.And extension 62a extends by radially inner side than the inside perimembranous Chao Zhou center, footpath across two adjacent magnet of clearance portion 7.By this extension 61a, 62a, also prevent that from footpath inside perimembranous 351c, 352c, 353c produce leakage flux.About leakage flux, narrate in the back.
Fig. 3, Fig. 4 illustrate flowing of magnetic flux in the stator of Fig. 2.First, in Ben Mada 1, from cutting apart magnetic flux that magnet 351,352,353 the produces state by the tooth 33c of armature 33, by being wound on tooth 33c winding 33b On current around, produce for making rotor 3 along the torque rotating in a circumferential direction.In general, in the structure that the lower axial end portion of magnet and the bottom surface complete cycle of housing are contacted, in the lower axial end portion of magnet, from the N utmost point, towards the S utmost point, produce magnetic flux.Specifically be, because the bottom surface of the magnetic flux flowing out from the N utmost point by housing flows to the S utmost point.Because magnetic flux bottom surface not by tooth but by housing after the N utmost point flows out flows to the S utmost point, so this magnetic flux becomes magnetic flux (leakage flux) M12 of the rotation that cannot be effectively applied to rotor.But, in the present embodiment, by the first recess 61 is set, can and cut apart between the boundary portion 352a at the 352b of lower axial end portion place of magnet 352 in bottom surface 22 distance is set.Therefore, in the present embodiment, can reduce the leakage flux M12 producing from the 352b of lower axial end portion.And, by reducing leakage flux M12, can increase the magnetic flux by tooth, increase the torque producing.Also identical about cutting apart magnet 351,353.
And, cutting apart magnetic flux (leakage flux) M22 that also produces the rotation that cannot be effectively applied to rotor between magnet 352 and 351.Therefore, by the bottom surface 22 at housing 2, the second recess 62 is set, can cut apart magnet 352 the 352b of lower axial end portion place the N utmost point and cut apart between the S utmost point the two and the bottom surface 22 at the 351b of lower axial end portion place of magnet 351 distance be set.Therefore, in the present embodiment, can reduce the leakage flux M22 producing from the 352b of lower axial end portion.And, by reducing leakage flux M22, can increase the magnetic flux by tooth, increase the torque producing.Cutting apart magnet 351 and cutting apart between magnet 353 and cut apart magnet 352 and cut apart between magnet 353 also identical.
And, in general, in the structure contacting with the bottom surface of housing in the lower axial end portion that makes magnet, in the situation that the lower axial end portion of magnet is configured in the position (with reference to figure 5) by axial downside than the lower axial end portion of tooth, from the magnetic flux M32 radially flowing out of magnet, do not pass through tooth, but pass through bottom surface.Therefore, this magnetic flux becomes magnetic flux (leakage flux) M32 of the rotation that cannot be effectively applied to rotor.But, in the present embodiment, by extension 61a is set, can and cut apart between the boundary portion 352a at inside perimembranous 352c place, footpath of magnet 352 in bottom surface 22 distance is set.Therefore, in the present embodiment, can reduce the leakage flux M32 that inside perimembranous 352c produces from footpath.And, by reducing leakage flux M32, can increase by the magnetic flux of tooth 33c, increase the torque producing.Also identical about cutting apart magnet 351,353.
And, cutting apart magnet 352 and cutting apart magnetic flux (leakage flux) M42 that also produces the rotation that cannot be effectively applied to rotor between magnet 351.Therefore, by extension 62a is set, can cut apart magnet 352 the 352b of lower axial end portion place the N utmost point and cut apart between the S utmost point the two and the bottom surface 22 at the 351b of lower axial end portion place of magnet 351 distance be set.Therefore, in the present embodiment, can reduce the leakage flux M42 that inside perimembranous 352c produces from footpath.And, by reducing leakage flux M42, can increase by the magnetic flux of tooth 33c, increase the torque producing.About cutting apart magnet 351 and cutting apart between magnet 353 and cut apart magnet 352 and cut apart between magnet 353 also identical.
Fig. 6 is the partial enlarged drawing of motor 1.The axial depth W1 of the first recess 61 and the second recess 62 is than the bottom of armature 33 and respectively to cut apart the 351b of lower axial end portion of magnet 351,352,353, axial distance W2 between 352b, 353b little.
Fig. 7 is the vertical view of housing 2 and magnet 351,352,353.The circumferential width W4 of the circumferential width W3 ratio gap portion 7 of the second recess 62 of radial position place identical with cutting apart magnet 351,352,353 is large.By making W3 be greater than W4, from respectively cutting apart the 351b of lower axial end portion of magnet 351,352,353, the magnetic flux of 352b, 353b generation does not pass through bottom surface 22, but easily by tooth 33c.Consequently, can reduce leakage flux.
The quantity of the first recess 61, second quantity of recess 62 and the number of poles of magnet equate.That is,, due to all boundary portion and clearance portion 7 are arranged to the first recess 61 and the second recess 62, therefore can further reduce leakage flux.
Fig. 8, Fig. 9 illustrate execution mode 2.In Fig. 8, the bottom surface 22 of housing 2 contacts at complete cycle with the 351b of lower axial end portion, 352b, the 353b of cutting apart magnet 351,352,353.The bottom surface 22 of housing 2 has the 3rd recess 63 and the 4th recess 64.
To housing 2 with cut apart magnet 351,352,353 and be described in detail.Fig. 9 is for only illustrating housing 2 and the stereogram of cutting apart magnet 351,352,353.Respectively cut apart magnet 351,352,353 along being circumferentially disposed at the side 21 of housing 2, between the magnet 351,352,353 along circumferentially adjacent, have clearance portion 7.The bottom surface 22 of housing 2 with cut apart magnet 351,352,353 351b of lower axial end portion, 352b, 353b separately and contact.At this, the bottom surface 22 of housing 2 contacts at complete cycle with the 351b of lower axial end portion, 352b, the 353b of cutting apart magnet 351,352,353.
The bottom surface 22 of housing 2 has the 3rd recess 63, described the 3rd recess 63 is configured in than respectively cutting apart the inside perimembranous 351c in footpath, the 352c of magnet 351,352,353, boundary portion 351a, the 352a at 353c place, 353a by the position of radially inner side, and towards axial downside depression.And housing 2 has the 4th recess 64, described the 4th recess 64 is configured in the position by radially inner side than each clearance portion 7, and towards axial downside depression.By the 3rd recess 63, the 4th recess 64, can reduce the inside perimembranous 351c in footpath, the 352c of respectively cutting apart magnet, the leakage flux at 353c place.And the in the situation that of this structure, the bottom surface 22 of housing 2 contacts at complete cycle with the 351b of lower axial end portion, 352b, the 353b of respectively cutting apart magnet 351,352,353.Therefore, for example, utilizing binding agent by cut apart magnet 351,352,353 and be fixed on housing 2 in the situation that, be and respectively cut apart magnet 351,352,353 and be difficult for the structure coming off from housing 2.About leakage flux, narrate in the back.
Figure 10 illustrates flowing of magnetic flux in the stator of Fig. 9.In the present embodiment, by the 3rd recess 63 is set, can and cut apart between the boundary portion 352a at inside perimembranous 352c place, footpath of magnet 352 in bottom surface 22 distance is set.Therefore, can reduce the leakage flux M32 that inside perimembranous 352c produces from footpath.And, by reducing leakage flux M32, can increase the magnetic flux by tooth, increase the torque producing.Also identical about cutting apart magnet 351,353.
And, cutting apart magnet 352 and cutting apart magnetic flux (leakage flux) M42 that also produces the rotation that cannot be effectively applied to rotor between magnet 351.Therefore,, by the 4th recess 64 is set, can and cut apart between the S utmost point the two and the bottom surface 22 at inside perimembranous 351c place, footpath of magnet 351 at the N utmost point at inside perimembranous 352c place, the footpath of cutting apart magnet 352 distance is set.Therefore, in the present embodiment, can reduce the leakage flux M42 that inside perimembranous 352c produces from footpath.And, by reducing leakage flux M42, can increase the magnetic flux by tooth, increase the torque producing.About cutting apart magnet 351 and cutting apart between magnet 353 and cut apart magnet 352 and cut apart between magnet 353 also identical.
Figure 11, Figure 12 illustrate execution mode 3.In Figure 11, the part except the second recess 62 of the bottom surface 22 of housing 2 and local contact of the 351b of lower axial end portion, 352b, 353b of cutting apart magnet 351,352,353.The bottom surface 22 of housing 2 has the second recess.
To housing 2 with cut apart magnet 351,352,353 and be described in detail.Figure 12 is for only illustrating housing 2 and the stereogram of cutting apart magnet 351,352,353.Respectively cut apart magnet along being circumferentially disposed at the side 21 of housing 2, in the week of respectively cutting apart magnet, upwards have clearance portion 7.The bottom surface 22 of housing 2 with cut apart the 351b of lower axial end portion separately of magnet 351,352,353,352b, 353b are local contacts.
The bottom surface 22 of housing 2 has the second recess 62, and described the second recess 62 caves in towards axial downside at the axial downside of respectively cutting apart the clearance portion 7 of magnet.The part except the second recess 62 of the bottom surface 22 of housing 2 contacts in the axial direction with each magnet.By the second recess 62, can prevent from producing leakage flux in the lower axial end portion of each magnet.And the second recess 62 has the extension 62a extending towards axle center.Extension 62a is than extending by radially inner side towards axle center across two adjacent inside perimembranous in footpath of cutting apart magnet of clearance portion 7.By extension 62a, also prevent that in footpath inside perimembranous 351c, 352c, 353c produce leakage flux.About leakage flux, narrate in the back.
And the second recess 62 has the extension 62a extending towards axle center.Specifically, extension 62a extends by radially inner side than the inside perimembranous Xiang Zhou center, footpath across two adjacent magnet of clearance portion 7.By this extension 62a, also prevent that in footpath inside perimembranous 351c, 352c, 353c produce leakage flux.About leakage flux, narrate in the back.
In Figure 13, cutting apart magnet 352 and cutting apart magnetic flux (leakage flux) M22 that produces the rotation that cannot be effectively applied to rotor between magnet 351.In the present embodiment, by the bottom surface 22 at housing 2, the second recess 62 is set, can cut apart magnet 352 the 352b of lower axial end portion place the N utmost point and cut apart between the S utmost point the two and the bottom surface 22 at the 351b of lower axial end portion place of magnet 351 distance be set.Therefore, in the present embodiment, can reduce the leakage flux M22 producing from the 352b of lower axial end portion.And, by reducing leakage flux M22, can increase the magnetic flux by tooth, increase the torque producing.
And, cutting apart magnet 352 and cutting apart magnetic flux (leakage flux) M42 that also produces the rotation that cannot be effectively applied to rotor between magnet 351.Therefore, in the present embodiment, by extension 62a is set, can and cut apart between the S utmost point the two and the bottom surface 22 at inside perimembranous 351c place, footpath of magnet 351 at the N utmost point at inside perimembranous 352c place, the footpath of cutting apart magnet 352 distance is set.Therefore, in the present embodiment, can reduce the leakage flux M42 that inside perimembranous 352c produces from footpath.And, by reducing leakage flux M42, can increase the magnetic flux by tooth, increase the torque producing.About cutting apart magnet 351 and cutting apart between magnet 353 and cut apart magnet 352 and cut apart between magnet 353 also identical.
Above, the execution mode related to the utility model is illustrated, but the utility model is not limited to illustrated execution mode.For example in execution mode, utilize and cut apart magnet and be illustrated, but can also be applied to ringshaped magnet cylindraceous.In ringshaped magnet cylindraceous, without the second recess 62 and the 4th recess etc.
Also can make the axial depth W1 of the first recess 61, the second recess 62, the 3rd recess 63, the 4th recess 64 larger than the axial distance W2 between the lower axial end portion of the bottom of armature 33 and each magnet.By making W1 larger than W2, the magnetic flux producing from the lower axial end portion of each magnet is by the bottom surface 22 of housing 2, but easily passes through tooth.Consequently, can reduce leakage flux.
And the utility model is not limited in and forms the structure of a part for stator by magnet and housing as shown in above-mentioned execution mode, can also be applied to as consisted of the structure of a part for rotor housing and magnet.
Claims (24)
1. a motor, it consists of stator and rotor, and described motor is characterised in that,
Described stator has:
The housing that has round-ended cylinder shape, it consists of magnetic; And
At least one magnet, medial surface and edge that described at least one magnet is fixed on described housing circumferentially have different magnetic poles, and the periphery of described at least one magnet is rounded or circular-arc,
Described rotor has:
Axle, it is supported to and can centered by the central axis of above downward-extension, rotates; And
Armature, itself and described magnet is radially opposed across gap and be fixed on described axle,
Described magnet has at least two contact sites that contact with the bottom surface of described housing, and described magnet two described contact sites circumferentially between have and described bottom surface discontiguous noncontact portion,
Described noncontact portion comprises the lower axial end portion of boundary portion of the described magnetic pole of described magnet.
2. motor according to claim 1, is characterized in that,
Described housing has the first recess, and described the first recess is caving in towards axial downside with described noncontact portion opposed part.
3. motor according to claim 2, is characterized in that,
Described the first recess extends to radially inner side than the inside perimembranous in footpath at the boundary portion place of described magnetic pole.
4. motor according to claim 3, is characterized in that,
The size of the radial clearance described in the depth ratio of described the first recess between armature and described magnet is large.
5. motor according to claim 2, is characterized in that,
The quantity of described the first recess equates with the number of poles of described magnet.
6. motor according to claim 5, is characterized in that,
Described magnet consists of a plurality of magnet of cutting apart along circumferentially having different magnetic poles,
Described a plurality of magnet of cutting apart configures along circumferential across the gapped clearance portion of tool mutually.
7. motor according to claim 6, is characterized in that,
Described housing has the second recess, and described the second recess caves in towards axial downside at the axial downside of described clearance portion.
8. motor according to claim 7, is characterized in that,
Cutting apart with described radial position place that magnet is identical, the circumferential width of described the second recess is larger than the circumferential width of described clearance portion.
9. motor according to claim 7, is characterized in that,
Described the second recess is than extending towards radially inner side across the inside perimembranous in footpath of cutting apart magnet described in adjacent two of described clearance portion.
10. motor according to claim 9, is characterized in that,
The size of the radial clearance described in the depth ratio of described the second recess between armature and described magnet is large.
11. motors according to claim 7, is characterized in that,
The quantity of the quantity of described the first recess and described the second recess equates with the number of poles of described magnet.
12. 1 kinds of motors, it consists of stator and rotor, and described motor is characterised in that,
Described stator has:
The housing that has round-ended cylinder shape, it consists of magnetic; And
At least one magnet, medial surface and edge that described at least one magnet is fixed on described housing circumferentially have different magnetic poles, and the periphery of described at least one magnet is rounded or circular-arc,
Described rotor has:
Axle, it is supported to and can centered by the central axis of above downward-extension, rotates; And
Armature, itself and described magnet is radially opposed across gap,
Described magnet contacts with the bottom surface of described housing,
Described housing has the 3rd recess, and described the 3rd recess arrangement is the position by radially inner side in the lower axial end portion than the boundary portion of described magnetic pole, and described the 3rd recess caves in towards axial downside.
13. motors according to claim 12, is characterized in that,
Described magnet consists of a plurality of magnet of cutting apart along circumferentially having different magnetic poles.
14. motors according to claim 13, is characterized in that,
The described magnet of cutting apart configures along circumferential across the gapped clearance portion of tool mutually,
Described housing has the 4th recess, and the radially inner side of described the 4th recess clearance portion described at least one caves in towards axial downside.
15. motors according to claim 12, is characterized in that,
Described the 3rd quantity of recess and the number of poles of described magnet equate.
16. motors according to claim 14, is characterized in that,
Described the 4th recess extends to the axial downside of the described clearance portion of described housing.
17. motors according to claim 16, is characterized in that,
Cutting apart with described radial position place that magnet is identical, the circumferential width of described the 4th recess is larger than the circumferential width of described clearance portion.
18. motors according to claim 12, is characterized in that,
The size of the radial clearance described in the depth ratio of described the 3rd recess between armature and described magnet is large.
19. motors according to claim 14, is characterized in that,
The size of the radial clearance described in the depth ratio of described the 4th recess between armature and described magnet is large.
20. motors according to claim 14, is characterized in that,
The quantity of described the 3rd recess and described the 4th quantity of recess and the number of poles of described magnet equate.
21. 1 kinds of motors, it consists of stator and rotor, and described motor is characterised in that,
Described stator has:
The housing that has round-ended cylinder shape, it consists of magnetic; And
A plurality of magnet of cutting apart, describedly a plurality ofly cuts apart that magnet is fixed on the medial surface of described housing and along circumferentially having different magnetic poles, and described a plurality of cut apart magnet mutually across the gapped clearance portion of tool along circumferentially configuration, and periphery is circular-arc,
Described rotor has:
Axle, it is supported to and can centered by the central axis of above downward-extension, rotates; And
Armature, its with described in cut apart magnet radially opposed across gap,
The described magnet of cutting apart contacts with the bottom surface of described housing,
Described housing has the second recess, and described the second recess caves in towards axial downside at the axial downside of described clearance portion.
22. motors according to claim 21, is characterized in that,
Described the second recess is than extending towards radially inner side across two adjacent inside perimembranous in footpath of cutting apart between magnet of described clearance portion.
23. motors according to claim 21, is characterized in that,
Described in the depth ratio of described the second recess armature and described in to cut apart the size of the radial clearance between magnet large.
24. motors according to claim 21, is characterized in that,
The quantity of described the second recess with described in cut apart magnet quantity equate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013120164A JP6343127B2 (en) | 2013-06-06 | 2013-06-06 | motor |
| JP2013-120164 | 2013-06-06 |
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| CN203933319U true CN203933319U (en) | 2014-11-05 |
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| CN201420294041.1U Active CN203933319U (en) | 2013-06-06 | 2014-06-04 | Motor |
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| CN (1) | CN203933319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945755A (en) * | 2017-07-21 | 2020-03-31 | 株式会社电装 | Rotating electrical machine |
| CN111749985A (en) * | 2019-03-29 | 2020-10-09 | 日本电产株式会社 | Gas dynamic pressure bearing, motor and fan motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11843334B2 (en) | 2017-07-13 | 2023-12-12 | Denso Corporation | Rotating electrical machine |
| WO2019017495A1 (en) | 2017-07-21 | 2019-01-24 | 株式会社デンソー | Dynamo-electric machine |
| JP2019024293A (en) | 2017-07-21 | 2019-02-14 | 株式会社デンソー | Rotary electric machine |
| JP6927186B2 (en) | 2017-12-28 | 2021-08-25 | 株式会社デンソー | Rotating machine |
| CN111565965B (en) | 2017-12-28 | 2023-07-14 | 株式会社电装 | Wheel driving device |
| JP7006541B2 (en) | 2017-12-28 | 2022-01-24 | 株式会社デンソー | Rotating machine |
| JP7056473B2 (en) * | 2017-12-28 | 2022-04-19 | 株式会社デンソー | Rotating electric machine |
| DE112018006717T5 (en) | 2017-12-28 | 2020-09-10 | Denso Corporation | Rotating electric machine |
| DE112018006699T5 (en) | 2017-12-28 | 2020-09-10 | Denso Corporation | Rotating electric machine |
| DE112018006694T5 (en) | 2017-12-28 | 2020-09-10 | Denso Corporation | Rotating electric machine |
| WO2019131905A1 (en) * | 2017-12-28 | 2019-07-04 | 株式会社デンソー | Rotating electrical machine |
| JP7280622B2 (en) * | 2020-08-28 | 2023-05-24 | 株式会社不二工機 | Stator unit, motor-operated valve, and stator unit manufacturing method |
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| JPS5127012U (en) * | 1974-08-20 | 1976-02-27 | ||
| JPS5815479U (en) * | 1981-07-23 | 1983-01-31 | 松下電工株式会社 | Magnetic motor case |
| JPH0496646A (en) * | 1990-08-10 | 1992-03-30 | Nippondenso Co Ltd | Stator of magneto electrical rotating machine |
| JPH05252690A (en) * | 1992-03-04 | 1993-09-28 | Daikin Ind Ltd | Dc brushless motor |
| JPH08103061A (en) * | 1994-09-29 | 1996-04-16 | Sankyo Seiki Mfg Co Ltd | Motor |
| JPH0956090A (en) * | 1995-08-11 | 1997-02-25 | Denso Corp | Field device for rotating electric machine |
| JPH10229667A (en) * | 1997-02-18 | 1998-08-25 | Hitachi Ltd | Brushless motor |
| JP2007288903A (en) * | 2006-04-14 | 2007-11-01 | Asmo Co Ltd | Motor |
| US8134267B2 (en) * | 2008-03-06 | 2012-03-13 | Lg Electronics Inc. | Motor including a rotor and a stator, and washing machine using the same |
| JP2011172301A (en) * | 2010-02-16 | 2011-09-01 | Minebea Co Ltd | Motor |
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- 2013-06-06 JP JP2013120164A patent/JP6343127B2/en active Active
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- 2014-06-04 CN CN201420294041.1U patent/CN203933319U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945755A (en) * | 2017-07-21 | 2020-03-31 | 株式会社电装 | Rotating electrical machine |
| CN110945755B (en) * | 2017-07-21 | 2022-08-02 | 株式会社电装 | Rotating electrical machine |
| CN111749985A (en) * | 2019-03-29 | 2020-10-09 | 日本电产株式会社 | Gas dynamic pressure bearing, motor and fan motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6343127B2 (en) | 2018-06-13 |
| JP2014239586A (en) | 2014-12-18 |
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