CN202034837U - Magnet retainer and permanent magnet motor equipped therewith - Google Patents
Magnet retainer and permanent magnet motor equipped therewith Download PDFInfo
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- CN202034837U CN202034837U CN2011200518116U CN201120051811U CN202034837U CN 202034837 U CN202034837 U CN 202034837U CN 2011200518116 U CN2011200518116 U CN 2011200518116U CN 201120051811 U CN201120051811 U CN 201120051811U CN 202034837 U CN202034837 U CN 202034837U
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- 239000000463 material Substances 0.000 claims abstract description 19
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- 230000005291 magnetic effect Effects 0.000 description 9
- 229910000639 Spring steel Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000004907 flux Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- 230000008093 supporting effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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Abstract
The utility model provides a magnet retainer and a permanent magnet motor equipped therewith. The magnet retainer is prevented from overlarge local stress, as well as stably presses and positions magnets. The magnet retainer (60) is arranged between multiple permanent magnets of the motor, and keeps the permanent magnets. The sheet material for bending into a rectangle of the magnet retainer is substantially a symmetrical shape, the two ends of the rectangle form first straight line portions (62), a third straight line portion (65) is formed in the center of the sheet material, second straight line portions (66) are formed in the middle of the first straight line portions and the third straight line portion, such that the first straight line portions are in surface contact with each other in a state of being kept between the permanent magnets, and the second straight line portions are in surface contact with the permanent magnets.
Description
Technical field
The utility model relates to magnet retainer that the middle permanent magnets that use such as the stator of motor are kept and the permanent magnet motor with this magnet retainer.
Background technology
The example of motor in the past with permanent magnet such as patent documentation 1 record.In this manual, the magnet assembly formation of using in the automotive fuel pump motor as described below.At a distolateral pump that is provided with of shell,, between pump and housing, connect airtight with housing and dispose the ferromagnetic magnetic flux carrier of tubulose at another distolateral case that is provided with.A pair of circular-arc unmagnetized permanent magnet configuration, is magnetized after configuration at the inner peripheral surface of this magnetic flux carrier.Circular-arc and the plastic locator of Yan Shening is configured between magnet vertically, and spring clip is pressed into magnet the magnet of locator with in the groove.Spring clip is across the circumferential opposition side of magnet configuration at locator.The axial length of locator and magnetic flux carrier are equal length, and the curvature of its outer peripheral face is consistent with the curvature of the inner peripheral surface of locator.
The example that is used for flexural spring that the magnet in the housing that is housed in motor is fixed such as patent documentation 2 record.Therefore record following situation in this communique: flexural spring in the past only has a bending area, in order to eliminate the unfavorable condition that high mechanical load imposes on spring, and forms at least two bending areas on flexural spring, and mechanical stress is disperseed.
Patent documentation 1: No. the 5391063rd, US Patent specification
Patent documentation 2: Japanese Unexamined Patent Application Publication 2004-512789 communique
In the magnet assembly that the petrolift that above-mentioned patent documentation 1 is put down in writing is used, be bent into the long leg bending slightly of U word of the clip of U font, can obtain spring.And, long leg a bit or 2 points, the permanent magnet that is configured in circumferential both sides is pushed.By using this clip, the permanent magnet that is configured in these clip both sides is positioned.
Yet motor is replaced as general steel for example stainless steel with clip from the spring steel with magnetic conductivity in order to pursue cheapization.In this case, to such an extent as in the U word shape, might take place based on the pressing force of elastic force not enough or in order to improve elasticity unfavorable conditions such as breakage take place in excessive stress in sweep.
The result who is replaced as general steel from spring steel can avoid flexibility decrease, in patent documentation 2, forms U word portion and V word section on flexural spring, and forms at least two bending areas.In the flexural spring that this communique is put down in writing, to the press section of permanent magnet for the some contact, on the pars intermedia of the spring portion that left-right symmetric forms, about spring also carry out a contact, all contact sites are all exceedingly concentrated stress.And, about the opening opposition side of spring be formed with the bight, stress also takes place on this part to be concentrated.
In addition, can't avoid the molding procedure complexity, the situation that cost raises.
The utility model content
The utility model is in view of the unfavorable condition of above-mentioned prior art and make, it is a kind of with non magnetic and than spring steel cheapness but the material of poor flexibility when being used in the magnet retainer of permanent magnet motor that its purpose is to provide, the local stress that prevents the magnet retainer is excessive, and does not make spring generation plastic deformation and deform in strain and the magnet retainer of the cheapness of stably magnet being pushed, locating.
The utility model of realizing above-mentioned purpose relates to a kind of magnet retainer, be configured between a plurality of permanent magnets that motor has and keep this permanent magnet, it is characterized in that, the sheet material of bending rectangle and form symmetric shape in fact, both ends at the sheet material of described rectangle form first line part, central portion at this sheet material forms the 3rd line part, pars intermedia at described first line part and described the 3rd line part forms second line part, make described first line part carry out the face contact each other, and make described second line part and described permanent magnet carry out face to contact with the state between the described permanent magnet of remaining on.
And, in this feature, preferably, between described first line part and second line part, form first arc sections, between described second line part and the 3rd line part, form second and third arc sections, and the radius of curvature that makes described second arc sections is greater than described first and the radius of curvature of three-arc portion.
That realizes above-mentioned purpose of the present utility modelly relates to a kind of permanent magnet motor on the other hand, on stator, has permanent magnet, it is characterized in that, described stator is along circumferentially having two or four permanent magnets and being configured in magnet retainer between this permanent magnet, a circumferential end face of described each permanent magnet contacts with described magnet retainer and circumferential other end contacts configuration with another permanent magnet part, described magnet retainer is with the sheet material bending of rectangle and form symmetric shape in fact, both ends at the sheet material of described rectangle form first line part, central portion at this sheet material forms the 3rd line part, pars intermedia at described first line part and described the 3rd line part forms second line part, make described first line part carry out the face contact each other, and make described second line part and described permanent magnet carry out face to contact with the state between the described permanent magnet part of remaining on.
And in this feature, preferably, described magnet retainer forms first arc sections between described first line part and second line part, between described second line part and the 3rd line part, form second and third arc sections, and the radius of curvature of described second arc sections is greater than described first and the radius of curvature of three-arc portion.
The utility model effect
According to the utility model, make the magnet retainer constitute symmetric shape, form line part and make the magnet retainer carry out the face contact each other at its both ends, and on magnet retainer and part that the end face of permanent magnet contacts, form line part, making magnet retainer and contacting of permanent magnet is the face contact, therefore even in the magnet retainer of permanent magnet motor, use non magnetic and than spring steel cheapness but the material of poor flexibility, also can make the magnet retainer plastic deformation not take place and in regime of elastic deformation, be out of shape the stress that relaxes the magnet retainer, thereby prevent that local stress is excessive.And the magnet retainer can stably be pushed permanent magnet and locate.
Description of drawings
Fig. 1 is the longitudinal sectional view of an embodiment of permanent magnet motor of the present utility model.
Fig. 2 (a) is the front view of the magnet retainer that has of motor shown in Figure 1, and Fig. 2 (b) is the end view of the magnet retainer that has of motor shown in Figure 1.
Fig. 3 is the figure of the manufacture process of explanation magnet retainer shown in Figure 2.
Fig. 4 A is explanation is assembled figure from magnet retainer shown in Figure 2 to motor, is the figure to the erection stage of anchor clamps.
Fig. 4 B be explanation will magnet retainer shown in Figure 2 to the figure of motor assembling, be the figure that situation about moving to motor body from anchor clamps is described.
Fig. 4 C be explanation will magnet retainer shown in Figure 2 to the figure of the other method of motor assembling, be the figure that situation about moving to motor body from anchor clamps is described.
Symbol description:
10 ... rotating shaft
20,30 ... bearing
40 ... stator case (housing)
42 ... the permanent magnet maintaining part
44 ... the bearing maintaining part
46 ... armature winding is kept out of the way portion
48 ... end cap
50 ... armature
60 ... the magnet retainer
60a～60c ... magnet retainer raw material (middle state)
60d ... magnet retainer (finishing product)
62 ... first line part
64 ... first arc sections
65 ... the 3rd line part
66 ... second line part
67 ... three-arc portion
68 ... second arc sections
70 ... permanent magnet
70a～70d ... permanent magnet (part)
80 ... lining
82 ... lead-in wire
90a ... magnet retainer anchor clamps (first anchor clamps)
90b, 90c ... permanent magnet anchor clamps (second anchor clamps)
92 ... the magnet retainer keeps using the hole
94,96 ... the extrusion instrument
100 ... the permanent magnet motor
A1～A3, C1, C2 ... moving direction
H1～h3 ... line part length
H ... the height of magnet retainer
R1, R2 ... the radius of curvature of arc sections
T ... the thickness of magnet retainer
W ... the width of magnet retainer
Embodiment
Below, use accompanying drawing, the embodiment of permanent magnet motor of the present utility model is described.Fig. 1 is the longitudinal sectional view of an embodiment of permanent magnet motor 100.Permanent magnet motor 100 comprises stator and rotor.Stator has: the stator case 40 that forms cup-shaped in order to be also used as stator yoke by strong magnetic material; Be installed in the permanent magnet 70 in interior week of the surrounding wall portion of stator case as the mechanism in the magnetic field that constitutes stator side; Be configured between the permanent magnet 70 and be used for magnet retainer 60 that permanent magnet 70 is kept and locatees.The peristome of stator case 40 is airtight by end cap 48.
Cup central portion at stator case 40 disposes bearing 20, will constitute rotating shaft 10 supportings of rotor for rotating freely.Rotor has rotating shaft 10 and armature 50, and one of rotating shaft 10 is distolaterally kept by above-mentioned bearing 20, the pars intermedia of rotating shaft 10 by another bearing 30 supportings for rotation freely.Armature 50 has: the armature core that is become the duplexer of steel plate of the shape of regulation to constitute by stamping-out; Be wound in the armature winding of the slot of this armature core.
Inner surface at end cap 48 is equipped with brushgear housing, and the brush that is kept by this brushgear housing contacts with commutator.And, derive lining 80 from end cap 48, the lead-in wire 82 that is electrically connected with brush is derived to the outside by lining 80.
Use Fig. 2 to Fig. 4 A, the details of the magnet retainer 60 that the permanent magnet motor 100 of the present utility model that constitutes like this is had is described.Fig. 2 is the front view (with figure (a)) and the end view (this figure (b)) thereof of magnet retainer 60.Fig. 3 is the figure of the manufacture method of explanation magnet retainer 60, and Fig. 4 A, Fig. 4 B are explanations with pack into the figure of situation of stator case of magnet retainer 60.
As shown in Figure 1, magnet retainer 60 is by permanent magnet 70 is pushed from its circumferencial direction side and permanent magnet 70 is positioned at parts on the assigned position of stator case 40.Therefore, need consider the elastic force of assembleability.Wherein, considering productivity and economy, is not spring steel but nonmagnetic stainless steel (SUS304) in the present embodiment.Therefore, compare under same shape with spring steel and can only bring into play little elastic force.In order to increase elastic force, magnet retainer 60 is maximized get final product, but the size that magnet retainer 60 is allowed is predetermined by each motor, need in this permissible range, make.
Therefore in the utility model, by increasing the part that works as spring of magnet retainer 60, and magnet retainer 60 is maximized, just can obtain required elastic force.Meanwhile, can avoid the excessive situation of local stress of the each several part of magnet retainer 60.
Specifically, become shape shown in Figure 2.The principal character of the magnet retainer 60 that this is shown in Figure 2 is following each situation, promptly, as the symmetric shape structure, to the side approximate equality of the not shown pair of permanent magnets of this magnet retainer 60 of clamping apply the situation of pressing force, by making the press section is not line contact but face contacts the situation of the local stress that reduces the point of load, in order to increase that performance part of elastic force and work in-process do not act on big load locally and the situation of curvature of bending part that reduces the peristome opposition side of magnet retainer 60, the situation that a plurality of (being 5 in the present embodiment) line part improves the operability when making is set by the magnet retainer after shaping.
That is, utilize the steel plate of the SUS304 system of thickness t mm, the magnet retainer 60 of width W, height H is formed horn shape.Magnet retainer 60 is the left-right symmetric shape, across the central authorities of raw material length and the interval of length h3mm is formed the 3rd line part 65.Continuous with the 3rd line part 65, and the then three-arc portion 67 left-right symmetric formation of radius of curvature R 3mm of second arc sections 68 of radius of curvature R 2mm.In addition, form second line part 66 of length h2mm continuously, form first arc sections 64 of radius of curvature R 1mm continuously with this second line part 66 with this second arc sections 68.Next, form first line part 62 of length h1mm continuously with first arc sections 64.At this, first arc sections 64 is roughly semi arch, the radius of curvature that radius of curvature R 1 separately, R2 are internal side diameter.
When shaping magnet retainer 60, relatively to first line part 62,62 between be formed with the roughly gap of thickness t mm amount, but when being clamped between two permanent magnets 70, this gap disappears and first line part 62,62 contacts with whole face.The side of 66 whole contacts of second line part that forms at this moment, permanent magnet 70.Therefore, behind assembling permanent magnet motor 100, magnet retainer 60 self or all carry out face with permanent magnet 70 and contact.
The more motor that uses such as motor vehicle is flat motor, and the each several part size of above-mentioned magnet retainer 60 and the size of permanent magnet 70 differ roughly about W=3mm, about H=20mm.The thickness t of the SUS304 steel plate that uses as t=1mm about.And the gap of first line part 62 after the shaping is below the 1mm.In addition, the length h3 of the 3rd line part 65 is about 3mm, and the length h2 of second line part is about 5mm.
Yet adding man-hour is that big local stress takes place bending part (three-arc portion) 67 at the connecting portion of the 3rd line part 65 and second arc sections 68 as can be known.Therefore, in order to reduce the stress of connecting portion, after then the 3rd line part 65 formed three-arc portion 67, the radius of curvature that makes second arc sections 68 was the value greater than the radius of curvature of first arc sections 64.Then, shorten the length h3 of the 3rd line part 65 and make the original position of second arc sections laterally (among Fig. 2 (a) laterally) be positioned at central side, reduce the stress that acts on three-arc portion 67.And, can increase the length that works as spring thus and be the above-below direction length among Fig. 2 (a).
Fig. 3 represents the processing sequence of above-mentioned magnet retainer 60.The SUS steel plate is cut into length required when launching magnet retainer 60 shown in Figure 2, obtain the raw material 60a (Fig. 3 (a)) of magnet retainer 60.The thickness of the steel plate of this moment is identical thickness t with the thickness of formed products.
Next, the bending machining of radius R 1 is implemented at the both ends of the length direction of raw material 60a, can be formed the intermediate raw material 60b (Fig. 3 (b)) of first line part 62 and first arc sections 64 simultaneously.Then, the center of raw material 60b is cut out, in the distance that equates across about this center, is that the position of h3 is as three-arc portion 67 with mutual air line distance, and form three-arc portion 67 and the 3rd line part 65 simultaneously, obtain intermediate raw material 60c (Fig. 3 (c)).
At last, be an end with three-arc portion 67 and be in the interval of the other end with first arc sections 64, the part that end from first arc sections 64 is deducted the length h2 of second line part 66 is carried out the circular arc processing of radius R 2, process second line part 66 and second arc sections 68 simultaneously, obtain the formed products 60d of magnet retainer.
In above-mentioned processing, the 3rd line part 65 is used the reference position as the operating parts of the center of the magnet retainer raw material 60a～60c in the processing and magnet retainer raw material 60a～60c.And second line part 66 for to the pushing of face of above-mentioned permanent magnet 70 and use, and be used reference position as the operating parts in this processing (with the contact site of not shown anchor clamps).
Next, use magnet retainer 60 that Fig. 4 A and Fig. 4 B explanation will so be shaped actual conditions to 100 assemblings of permanent magnet motor.Pack into the situation of permanent magnet 70 and magnet retainer 60 of the anchor clamps that Fig. 4 A is illustrated in assembling usefulness.
External diameter forms ring-type for the magnet retainer that roughly footpath and internal diameter are littler than the internal diameter of permanent magnet 70 together with anchor clamps 90a with anchor clamps 90b, 90c with the permanent magnet that details is described in the back.And, with the internal diameter of permanent magnet 70 and external diameter for being that the lateral length (length the state that the lateral length of Fig. 2 (a) and first line part 62 join each other under) of magnet retainer 60 is formed on two positions of symmetric position for the hole 92 of perforation along the vertical direction of roughly the same width roughly with footpath and width.
Not shown pickout apparatus is selected magnet retainer 60, and be positioned at hole 92 directly over, and make the 3rd line part 65 of magnet retainer 60 be positioned at downside, and magnet retainer 60 be pressed into (Fig. 4 A (a)) in the hole 92 along arrow A 3 directions.
On the other hand, permanent magnet 70 is four structures of cutting apart of the part shortcoming of the ring of ferrite system, and each permanent magnet part 70a～70d also is not magnetized.And, with each two, in Fig. 4 A (b) with permanent magnet 70a and permanent magnet 70b combination, and with permanent magnet 70c and permanent magnet 70d combination.Be formed with the gap of inserting for magnet retainer 60 in the future between permanent magnet 70a and the permanent magnet 70c and between permanent magnet 70b and the permanent magnet 70d.
In order to keep permanent magnet 70a～70d, and the permanent magnet of preparing to be divided into two-part shape is with anchor clamps 90b, 90c.Permanent magnet is roughly the same with anchor clamps 90a with external diameter and the magnet retainer of anchor clamps 90b, 90c, and the external diameter of internal diameter and permanent magnet 70a～70d is roughly the same.This permanent magnet is complete circle with anchor clamps 90b, 90c when making up, and its above-below direction height is identical or higher with the height of permanent magnet 70a～70d.
Permanent magnet is placed to the state that separates from circular state in not shown assembling with anchor clamps 90b, 90c on workbench, so that permanent magnet becomes the mode of same position with the position in the gap of the two-part position of being divided into of anchor clamps 90b, 90c and permanent magnet part 70a～70d, make behind the location permanent magnet part 70a～70d from above shown in arrow A 2, move (Fig. 4 A (b)) downwards, permanent magnet moves and becomes complete ring (Fig. 4 A (c)) to the direction shown in the arrow A 1 with anchor clamps 90b, 90c along continuous straight runs.
By above operation, shown in Fig. 4 B (a)～Fig. 4 B (c), permanent magnet 70a～70d keeps (Fig. 4 B (a)) by permanent magnet with anchor clamps 90b, 90c, and magnet retainer 60 is by hole 92 maintenances (Fig. 4 B (b)) of magnet retainer with anchor clamps 90a.At this, Fig. 4 B (c) is that the B-B of Fig. 4 B (b) is to pseudosection.
Next, making magnet is downside and to make the magnet retainer be with anchor clamps 90a that upside carries out stacked with anchor clamps 90b, 90c.At this moment, so that magnet is involutory and make the center consistent and make the magnet retainer go up the circumferential center in the hole 92 that forms and magnet with anchor clamps 90a to position (Fig. 4 B (d)) with the mode of the circumferential position unanimity of the involutory surface of anchor clamps 90b, 90c with the outer path position of anchor clamps 90a with anchor clamps 90b, 90c and magnet retainer.
Therefore under hole 92, be formed with the gap of the combination of permanent magnet part 70a～70d, use to extrude the direction extrusion (Fig. 4 B (e)) along arrow C 1 with the hole 92 of anchor clamps 90a with magnet retainer 60 to permanent magnet part 70a that permanent magnet is kept with anchor clamps 90b, 90c and the gap between the gap between the permanent magnet part 70d and permanent magnet part 70b and the permanent magnet part 70d from the magnet retainer with instrument 94.
Because magnet retainer 60 moves in the ring of permanent magnet with anchor clamps 90b, 90c formation fully, therefore uses anchor clamps 96 that permanent magnet part 70a～70d and magnet retainer 60 are extruded along arrow C 2 directions to the internal perisporium of the stator case 40 that forms glass type together.Stator case will keep the bearing maintaining part 44 of bearing 10 at the central portion of bottom surface and (70a～70d) the permanent magnet maintaining part 42 with magnet retainer 60 forms with ladder, is formed with armature winding and keeps out of the way portion 46 between permanent magnet maintaining part 42 and bearing maintaining part 44 at peripheral part maintenance permanent magnet 70.When extruding permanent magnet part 70a～70d, the surrounding wall portion of permanent magnet maintaining part 42 and stator case 40 becomes guide portion, therefore is positioned when extruding.After the assembling of finishing processing and rotor etc., magnetize from the outside with permanent magnet 70.
According to present embodiment, can obtain reducing the non magnetic of local stress and not use the magnet retainer of spring steel by simple manufacturing procedure.And, because simple shape, so operability is also good, can improve the percent of automatization of assembling.If scale enlarges, then can tackle the variation of motor capacity easily in addition.And, because necessary raw material is the plate of single rectangle, therefore not have the part of wasting and can effectively utilize raw material.
Next, use Fig. 4 A and Fig. 4 C that the other method of the permanent magnet motor 100 of in fact magnet retainer 60 being packed into is described.According to the order shown in Fig. 4 A, permanent magnet 70a～70d is kept with anchor clamps 90b, 90c by permanent magnet, and magnet retainer 60 is kept with anchor clamps 90a by the magnet retainer.Next, with the foregoing description similarly, the magnet retainer that maintains magnet retainer 60 is positioned in permanent magnet with on anchor clamps 90b, the 90c with anchor clamps 90a.
At this moment, shown in Fig. 4 C (d), make permanent magnet opposed with anchor clamps 90c along continuous straight runs across the gap with anchor clamps 90b and permanent magnet.Under this state, make magnet retainer 60 drop between permanent magnet 70a and the permanent magnet 70c and the gap between permanent magnet 70b and the permanent magnet 70d.Then, permanent magnet is moved along arrow c3 direction with anchor clamps 90b, 90c, make permanent magnet with anchor clamps 90b, 90c relatively to face between contact.So make a pair of anchor clamps 90b, 90c contact and after integrated, shown in this figure (f), the stator department integral body that permanent magnet 70a～70d and magnet retainer 60 are formed together is pressed into stator case 40 along arrow C 2 directions.
In the present embodiment, also can obtain alleviating the non magnetic of local stress and not use the magnet retainer of spring steel by simple manufacturing procedure.And, because simple shape, so operability is also good, can improve the percent of automatization of assembling.If scale enlarges, then can tackle the variation of motor capacity easily in addition.And, because necessary raw material is the plate of single rectangle, therefore not have the part of wasting and can effectively utilize raw material.
In the various embodiments described above, permanent magnet formed with anchor clamps be divided into two-part shape, making magnet part along continuous straight runs move and assemble, is a shape of ring-type but also can make the permanent magnet anchor clamps, the magnet part is moved along the vertical direction and assembles.In this case, magnet circumferentially and the automation of radial direction location aspect than present embodiment difference, but, therefore can simplify flow chart owing to can the magnet retainer be pressed between the magnet by a series of action.
In addition, in the various embodiments described above, the material that makes the magnet retainer is SUS304, but material is not limited thereto, get final product so long as have the material of elasticity (springiness), and also can be magnetic material.But the flux loss of nonmagnetic substance is few, and is therefore preferred.In addition, in the above-described embodiments, illustrated permanent magnet is formed the situation that is divided into tetrameric shape and uses two magnet retainers, but permanent magnet is divided into two parts and only uses the situation of a magnet retainer can be suitable for the utility model equally.
According to the various embodiments described above, the magnet retainer is owing to have three kinds of line parts i.e. first line part and second line part, the 3rd line part, therefore between permanent magnet and the magnet retainer contact and the contact site of magnet retainer self all be that face contacts, can relax stress and prevent the generation of the excessive stresses of part.And, by having three kinds of line parts, can increase the degree of connecting airtight that adds man-hour to operating parts and anchor clamps, and the generation of the unfavorable condition can suppress processing automatically and assembling the time.Promptly, if there is not the face contact site, might be because excessive power and spring deforms in the time of then in the gap that spring is inserted between magnet, but according to present embodiment, owing to utilize the face contact site of spring to assemble, therefore can not make camber of spring and assemble keeping under the state of shape.
In addition, because the magnet retainer has three kinds of arc sections i.e. first arc sections and second arc sections, three-arc portion, therefore after anchor clamps that permanent magnet is packed in each operation that is encased in stator case, can relax the stress of magnet retainer generation and concentrate, and can prevent the generation of excessive local stress.
Claims (4)
1. magnet retainer is configured between a plurality of permanent magnets that motor has and keeps this permanent magnet, it is characterized in that,
The sheet material of bending rectangle and form symmetric shape in fact, both ends at the sheet material of described rectangle form first line part, central portion at this sheet material forms the 3rd line part, pars intermedia at described first line part and described the 3rd line part forms second line part, make described first line part carry out the face contact each other, and make described second line part and described permanent magnet carry out face to contact with the state between the described permanent magnet of remaining on.
2. magnet retainer according to claim 1 is characterized in that,
Between described first line part and second line part, form first arc sections, between described second line part and the 3rd line part, form second and third arc sections, and the radius of curvature that makes described second arc sections is greater than described first and the radius of curvature of three-arc portion.
3. the permanent magnet motor with magnet retainer has permanent magnet on stator, it is characterized in that,
Described stator is along circumferentially having two or four permanent magnets and being configured in magnet retainer between this permanent magnet, a circumferential end face of described each permanent magnet contacts with described magnet retainer and circumferential other end contacts configuration with another permanent magnet, described magnet retainer is with the sheet material bending of rectangle and form symmetric shape in fact, both ends at the sheet material of described rectangle form first line part, central portion at this sheet material forms the 3rd line part, pars intermedia at described first line part and described the 3rd line part forms second line part, make described first line part carry out the face contact each other, and make described second line part and described permanent magnet carry out face to contact with the state between the described permanent magnet of remaining on.
4. the permanent magnet motor with magnet retainer according to claim 3 is characterized in that,
Described magnet retainer forms first arc sections between described first line part and second line part, between described second line part and the 3rd line part, form second and third arc sections, and the radius of curvature of described second arc sections is greater than described first and the radius of curvature of three-arc portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010292310A JP5380426B2 (en) | 2010-12-28 | 2010-12-28 | Method for assembling a permanent magnet motor having a magnet retainer |
| JP2010-292310 | 2010-12-28 |
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| Publication Number | Publication Date |
|---|---|
| CN202034837U true CN202034837U (en) | 2011-11-09 |
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| CN2011200518116U Expired - Fee Related CN202034837U (en) | 2010-12-28 | 2011-02-25 | Magnet retainer and permanent magnet motor equipped therewith |
| CN201110048134.7A Active CN102570649B (en) | 2010-12-28 | 2011-02-25 | Magnet retainer, permanent magnet motor equipped therewith and assembling method thereof |
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| CN201110048134.7A Active CN102570649B (en) | 2010-12-28 | 2011-02-25 | Magnet retainer, permanent magnet motor equipped therewith and assembling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102570649A (en) * | 2010-12-28 | 2012-07-11 | 国产电机株式会社 | Magnet retainer, permanent magnet motor equipped therewith and assembling method thereof |
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|---|---|---|---|---|
| CN108718123A (en) * | 2018-08-01 | 2018-10-30 | 浙江美茵电机有限公司 | A kind of Permanent magnet DC high pressure slicer motor |
| DE102019207983A1 (en) * | 2019-05-31 | 2020-12-03 | Robert Bosch Gmbh | Device for reducing mechanical loads under and in a functional component |
| CN113676005B (en) * | 2021-08-31 | 2022-12-02 | 浙江盘毂动力科技有限公司 | Forming method of silicon steel block of axial switch reluctance motor rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61156474U (en) * | 1985-03-19 | 1986-09-27 | ||
| US5391063A (en) * | 1994-04-25 | 1995-02-21 | General Motors Corporation | Magnet assembly for electric fuel pump |
| JP2000324731A (en) * | 1999-05-11 | 2000-11-24 | Kokusan Denki Co Ltd | Dc motor stator |
| DE10004703A1 (en) * | 2000-02-03 | 2001-08-23 | Bosch Gmbh Robert | Bow spring |
| DE10031254A1 (en) * | 2000-06-27 | 2002-01-10 | Bosch Gmbh Robert | bow spring |
| JP4171914B2 (en) * | 2003-11-27 | 2008-10-29 | 株式会社デンソー | Electric motor, elastic member used therefor, and electric motor manufacturing apparatus |
| JP2008178272A (en) * | 2007-01-22 | 2008-07-31 | Asmo Co Ltd | Fixing spring, stator and motor |
| JP5376141B2 (en) * | 2009-06-11 | 2013-12-25 | 国産電機株式会社 | Motor and spring for fixing magnet of motor |
| JP5380426B2 (en) * | 2010-12-28 | 2014-01-08 | 国産電機株式会社 | Method for assembling a permanent magnet motor having a magnet retainer |
-
2010
- 2010-12-28 JP JP2010292310A patent/JP5380426B2/en active Active
-
2011
- 2011-02-25 CN CN2011200518116U patent/CN202034837U/en not_active Expired - Fee Related
- 2011-02-25 CN CN201110048134.7A patent/CN102570649B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570649A (en) * | 2010-12-28 | 2012-07-11 | 国产电机株式会社 | Magnet retainer, permanent magnet motor equipped therewith and assembling method thereof |
| CN102570649B (en) * | 2010-12-28 | 2015-01-28 | 国产电机株式会社 | Magnet retainer, permanent magnet motor equipped therewith and assembling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5380426B2 (en) | 2014-01-08 |
| JP2012143038A (en) | 2012-07-26 |
| CN102570649A (en) | 2012-07-11 |
| CN102570649B (en) | 2015-01-28 |
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