CN102857055A - Electromotor - Google Patents
Electromotor Download PDFInfo
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- CN102857055A CN102857055A CN2012102140638A CN201210214063A CN102857055A CN 102857055 A CN102857055 A CN 102857055A CN 2012102140638 A CN2012102140638 A CN 2012102140638A CN 201210214063 A CN201210214063 A CN 201210214063A CN 102857055 A CN102857055 A CN 102857055A
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Abstract
The present invention provides an electromotor capable of suppressing increase of production cost and capable of ensuring heat dissipation. The electromotor (1) is provided with: a stator core (32) carrying a drive coil (33) and in a ring shape; a tubular casing (11) holding the stator core (32) inside; a second bearing retainer (13) used for supporting a rotor (40) in a rotatable way; wherein the stator core (32) has a circular protruding part (34) protruded from an opening of the tubular casing (11), the second bearing retainer (13) is arranged on a front end part (34a) of the circular protruding part (34) of the stator core (32) and covers the circular protruding part (34) from outside; the tubular casing (11) is formed by a ferrous metal material, the second bearing retainer (13) is formed by an aluminous metal material, therefore, compared with the situation that the two components are both formed by the aluminous metal material, the present invention can suppress production cost of the electromotor (1); in addition, the second bearing retainer (13) covers a quarter of full length of the stator core (32), thus the heat dissipation of the electromotor (1) can be ensured.
Description
Technical field
The present invention relates to constitute the motor that the stator core of will carry the ring-type of drive coil remains on the motor field frame inboard.
Background technology
Constitute the stator that is provided with the stator core that possesses the ring-type of carrying drive coil, and rotor is recorded in the patent documentation 1 with the motor that the mode that can rotate is disposed at the stator inboard.Motor in the patent documentation 1 possesses as motor field frame and stator core to be remained in inboard cylindrical case and be kept for flange with the bearing of the mode supporting rotor that can rotate.Stator core possesses from cylindrical case along the motor axis direction outstanding a little ledge, and flange is installed on the ledge of stator core.In patent documentation 1, in order to produce and be trapped in thermal release in the motor field frame to outside by drive coil, the aluminum-based metal material high by conductive coefficient forms cylindrical case and flange.
Patent documentation 1: Japanese communique, JP 2009-290915 number
Summary of the invention
At this, general employed Ferrious material material is compared expensive in aluminum-based metal material and the motor field frame.Therefore, when cylindrical case and flange form by the aluminum-based metal material, exist the production cost of motor to increase such problem.
In view of above problem points, problem of the present invention is, a kind of motor that can suppress the increase of production cost and can guarantee thermal diffusivity is provided.
In order to solve above-mentioned problem, motor of the present invention is provided with: stator core, and it carries drive coil and in the form of a ring; Rotor, it is disposed at the inboard of said stator iron core; Cylindrical case, it remains in the inboard with the said stator iron core; Retainer, it possesses for the bearing that supports above-mentioned rotor in the mode that can rotate, it is characterized in that, the said stator iron core possesses from the outstanding ledge of the opening of above-mentioned cylindrical case, above-mentioned retainer is formed by the material that conductive coefficient is higher than above-mentioned cylindrical case, and above-mentioned retainer is installed on the fore-end of above-mentioned ledge of said stator iron core, and this ledge is covered from the outside.
According to the present invention, the cylindrical case and the retainer in the retainer that play a role as motor field frame are formed by the material that conductive coefficient is higher than cylindrical case.Therefore, the material high with using conductive coefficient forms the situation of cylindrical case and these two parts of retainer and compares, and can suppress the production cost of motor.For example, form cylindrical case by the Ferrious material material, when forming retainer by the aluminum-based metal material, comparing with the situation that is formed cylindrical case and these two parts of retainer by the aluminum-based metal material, can suppress the production cost of motor.
In addition, retainer is installed in also this ledge being covered from the outside of stator core from the fore-end of the outstanding ledge of the opening of cylindrical case, therefore, by increasing the outstanding size from the outstanding ledge of cylindrical case of stator core, can enlarge the area of retainer covering stator iron core.Therefore, can improve the thermal diffusivity of motor.
In the present invention, preferred above-mentioned retainer possesses ring-type fixed part and ring-type cap, wherein, above-mentioned ring-type fixed part within it side embeds the said front part that above-mentioned ledge is arranged, and above-mentioned ring-type cap covers from outer circumferential side to form gapped state between this ring-type cap and this circular outer periphery face at the circular outer periphery face between the above-mentioned opening of above-mentioned ring-type fixed part and above-mentioned cylindrical case above-mentioned ledge.By like this, when the fore-end with the ledge of stator core embeds in the ring-type fixed part of retainer, can prevent or the fore-end that suppresses to pass the ledge of ring-type cap inboard contacts with the inner peripheral surface of ring-type cap and with this inner peripheral surface scraping.Therefore, the operation that retainer is installed in the stator core becomes easy.
In the present invention, preferably above-mentioned ring-type cap along in the gamut of motor axis direction, between the above-mentioned circular outer periphery face of above-mentioned ledge and above-mentioned ring-type cap, be formed with the gap.By like this, when the fore-end with the ledge of stator core embeds in the ring-type fixed part of retainer, can effectively prevent or the fore-end that suppresses to pass the ledge of ring-type cap inboard contacts with the inner peripheral surface of ring-type cap and with this inner peripheral surface scraping.Therefore, retainer being installed in operation in the stator core becomes and is more prone to.
In the present invention, for example, above-mentioned retainer possesses end plate section and outer side tube part, and, above-mentioned ring-type fixed part and above-mentioned ring-type cap are formed on the above-mentioned outer side tube part, wherein, above-mentioned end plate section consists of the end on the motor axis direction of above-mentioned retainer, and above-mentioned outer side tube part is outstanding towards the motor axis direction partly from the radial outside of above-mentioned end plate section.In addition, in the present invention, for example, the internal diameter size of ring-type cap is greater than the internal diameter size of above-mentioned ring-type fixed part, and the internal diameter size of ring-type cap is greater than the outside dimension of said stator iron core.In addition, in the present invention, for example, the thickness of the above-mentioned ring-type cap of the Thickness Ratio of above-mentioned ring-type fixed part is thick.
In the present invention, preferred above-mentioned cylindrical case keeps said stator unshakable in one's determination with the state towards inboard extruding said stator iron core, and the said front part of said stator iron core is by the state of the above-mentioned ring-type fixed part of above-mentioned retainer towards the inboard extruding.In this situation, for example, the said front part of said stator iron core is by the inboard of shrink fit at the above-mentioned ring-type fixed part of above-mentioned retainer.
For example, when stator core is fixed on cylindrical case inboard by shrink fit, perhaps, thereby stator core is pressed into when being maintained at cylindrical case inboard in the cylindrical case etc., because cylindrical case keeps stator core with the state towards inboard extruding stator core, therefore, exist the ledge warpage of giving prominence to from cylindrical case of stator core to become its front towards the situation of the state of radial outside expansion.Therefore, when being installed on retainer in the stator core, by pushed the fore-end of the ledge of stator core towards the inboard by the ring-type fixed part of retainer, can suppress the warpage of the ledge of stator core.
In addition, when the inboard of the ring-type fixed part that embeds retainer by the fore-end with the ledge of stator core and during the warpage of restraining outburst part, the cylindricity of stator core improves, therefore, the cogging torque that can suppress motor increases.
In this situation, in order to keep stator core by cylindrical case with the state towards inboard extruding stator core, can adopt following such formation, namely, above-mentioned cylindrical case is made by Ferrious material, and the said stator iron core is maintained in the above-mentioned cylindrical case by shrink fit.
In addition, in this situation, the structure that can adopt the said stator iron core to be consisted of by a plurality of stator core sheets of arranging along circumferencial direction.
In the present invention, in order to improve the thermal diffusivity of motor field frame, the length dimension of above-mentioned ledge on the motor axis direction of preferred said stator iron core is 1/4th above sizes of the length dimension of this stator core.By like this, can guarantee the area of retainer covering stator iron core.In addition, in this situation, for example, the length dimension of above-mentioned ledge on the motor axis direction of said stator iron core is 1/2nd following sizes of the length dimension of this stator core.
In the present invention, for example, motor is provided with second retainer of above-mentioned bearing of the outlet side that possesses the above-mentioned rotor of supporting as above-mentioned retainer, and above-mentioned the second retainer is that metal is made by aluminum-based metal or magnesium.In addition, in the present invention, for example, motor is provided with the clutch shaft bearing retainer of the bearing of the anti-outlet side that possesses the above-mentioned rotor of supporting, and above-mentioned clutch shaft bearing retainer is made by Ferrious material.
(invention effect)
According to the present invention, the cylindrical case and the retainer in the retainer that play a role as motor field frame are formed by the material that conductive coefficient is higher than cylindrical case.Therefore, the material high with using conductive coefficient forms the situation of cylindrical case and these two parts of retainer and compares, and can suppress the production cost of motor.In addition, the front end from the outstanding ledge of the opening of cylindrical case that retainer is installed in stator core also covers this ledge from the outside, therefore, by increasing the outstanding size of ledge, the area of retainer covering stator iron core can be enlarged, the thermal diffusivity of motor can be improved thus.
Description of drawings
Fig. 1 is the key diagram of the outward appearance of the motor that relates to of expression embodiments of the present invention, and at this, Fig. 1 (a) is the end view of motor, and Fig. 1 (b) is the rearview of observing motor from anti-outlet side.
Fig. 2 is the sectional arrangement drawing of the motor of Fig. 1.
Fig. 3 is the sectional arrangement drawing of motor field frame.
Fig. 4 (a) is the key diagram of the Assembly Action of assembling motor housing and stator, and Fig. 4 (b) is the key diagram of the fixed structure of the second retainer on the fore-end of stator core.
(symbol description)
1 motor
11 cylindrical cases
12 clutch shaft bearing retainers
13 second retainers
15 second bearings
32 stator cores
33 drive coils
34 circular ledges
The 34a fore-end
40 rotors
80 looped end boards
81 outer side tube parts
81a ring-type fixed part
81b ring-type cap
The G gap
The L motor axis
Embodiment
Below, with reference to accompanying drawing the motor that embodiments of the present invention relate to is described.In the following description, a side of motor axis direction is made as " anti-outlet side (opposition side of the outstanding side of rotating shaft) " and describes, the opposite side of motor axis direction is made as " outlet side (rotating shaft is given prominence to side) " describes.In addition, in the accompanying drawing of institute's reference, with " L " expression motor axis, with a side (anti-outlet side) of " L1 " expression motor axis direction, with the opposite side (outlet side) of " L2 " expression motor axis direction.
(whole formation)
Fig. 1 (a) is the end view of the motor that relates to of embodiments of the present invention, and Fig. 1 (b) is the rearview of observing motor from anti-outlet side L1.Fig. 2 is the sectional arrangement drawing of motor 1.This routine motor 1 is the larger permanent-magnet type synchronous motor of output torque.As shown in Figure 1 and Figure 2, motor 1 possesses: motor field frame 10; Stator 30, it is arranged on the inboard of motor field frame 10 and is tubular; Rotor 40, it is disposed at the inboard of stator 30; Encoder 60, it is for detection of rotating speed or the angle position of rotor 40; Encoder lid 70, it is installed on the anti-outlet side L1 of motor field frame 10.
Clutch shaft bearing retainer 12 is provided with distribution support plate 16 in the angle position around the regulation of motor axis L.Distribution support plate 16 possesses outstanding board 16a and fixing board 16b, wherein, above-mentioned outstanding board 16a is outstanding towards radial outside from clutch shaft bearing retainer 12, and above-mentioned fixedly board 16b is crooked and extend along the outer peripheral face of cylindrical case 11 towards outlet side L2 from the front end of outstanding board 16a.Lead to the feed line 17 in the outside from the inboard of motor field frame 10 and lead to the transducer output line 18 in the outside from the inboard of encoder lid 70, be fixed on fixedly on the board 16b by bonding agent and strapping 19.
In addition, be tied the part that is fastened on the fixing board 16b with 19 in feed line 17 and the transducer output line 18, together covered by sleeve pipe (tube) 20 from outer circumferential side with fixing board 16b.Sleeve pipe 20 is with the heat-shrinkable tube heating and the parts after making it shrink curing.Be separately installed with connector 21,22 on the leading section of feed line 17 and transducer output line 18.
At this, be fixed with the second retainer 13 on the fore-end 34a of circular ledge 34, and circular ledge 34 is covered by the second retainer 13.
Anti-outlet side L1 at stator 30 disposes the wiring substrate 35 that is connected with the coiling end of drive coil 33, is connected with feed line 17 at wiring substrate 35.This feed line 17 is led to the outside of motor field frame 10 via lining (bush) 36 and is fixed on the distribution support plate 16, and wherein, above-mentioned lining 36 is inserted among the notch 11a that is formed on the cylindrical case 11.
The driving that rotor 40 possesses rotating shaft 41 and is fixed on the tubular on the outer circumferential side of this rotating shaft 41 is with magnet 42.In addition, rotor 40 is configured with the state of vacating minim gap between the salient pole 31 that drives with magnet 42 and stator core 32.
Rotating shaft 41 is made by Ferrious material, and the end of the outlet side L2 of rotating shaft 41 is outstanding laterally from motor field frame 10.Driving with magnet 42 is to dispose in the form of a ring a plurality of magnetic sheets of along the circumferential direction bending and consist of, and is wound with the adhesive tape 51 of the usefulness that prevents from dispersing with magnet 42 in the driving that is made of a plurality of magnetic sheets.Comparing in rotating shaft 41 drives the collar 14a that the shaft portion that is positioned at anti-outlet side L1 with magnet 42 is equipped with the clutch shaft bearing 14 that is made of ball bearing, comparing shaft portion that driving is positioned at outlet side L2 with magnet 42 and be equipped with the collar 15a of the second bearing 15 that is made of ball bearing.
Transducer is in the form of annular discs with magnet 62, and its circular end surface 62a towards anti-outlet side L1 becomes magnetic pole strength.Circular end surface 62a along the circumferential direction is divided into two parts, and is respectively equipped with a N utmost point and a S utmost point.Magneto sensor 63 is to be formed with the magnetoresistive element of magnetic resistance figure along orthogonal direction, and be installed on the outlet side L2 end face of sensor base plate 64 with transducer with on the relative position, the center of magnet 62.The electronic unit of the semiconductor device that consists of rotation detection circuit etc. is installed at the face of the anti-outlet side L1 of sensor base plate 64.When transducer rotates a circle with magnet 62, from magneto sensor the A phase and B sine wave signal mutually in 63 two cycles of output.Rotation detection circuit is implemented to amplify to this A phase and B signal mutually and is processed or interpolation processing and output.
At this, the signal that is connected with for spinning in future testing circuit at sensor base plate 64 exports outside transducer output line 18 to.This transducer output line 18 is led to the outside of encoder lid 70 via lining 73 and is fixed on the distribution support plate 16, and wherein, above-mentioned lining 73 is inserted among the notch 70a on the cylindrical portion 72 that is formed at encoder lid 70.In addition, in Fig. 2, omitted the coupling part of transducer output line 18 with encoder 60.
(motor field frame)
With reference to Fig. 2, Fig. 3 motor field frame 10 is at length described.Fig. 3 is the sectional arrangement drawing of motor field frame 10.Cylindrical case 11 is made by Ferrious material.Cylindrical case 11 possesses: cylindrical portion 11b; First connects board 11c, and it is crooked and in the form of a ring towards radially inner side in the open end of the anti-outlet side L1 of cylindrical portion 11b; Second connects board 11d, its in the open end of the outlet side L2 of cylindrical portion 11b towards radial outside crooked (with reference to Fig. 1 (b)).Part on the circumferencial direction of the anti-outlet side L1 edge of opening of cylindrical portion 11b is formed with notch 11a.As shown in Figure 2, cylindrical case 11 is so that the part of the outlet side L2 of stator core 32 keeps stator core 32 from the outstanding state of the opening of its outlet side L2.
Clutch shaft bearing retainer 12 is made by Ferrious material.Clutch shaft bearing retainer 12 possesses: looped end board 12a, and it is connected the anti-outlet side L1 of board 11c with first of cylindrical case 11 overlapping and fixed by screw; Cylindrical portion 12b, its inner rim genesis from looped end board 12a is outstanding towards outlet side L2; The 12c of annular base plate section, it is crooked towards radially inner side from the fore-end of cylindrical portion 12b.The part relative with the notch 11a of cylindrical case 11 in the neighboring of looped end board 12a is formed with distribution support plate 16.Maintain the movable ring 14b of clutch shaft bearing 14 at the 12d of annular stepped section that is formed by cylindrical portion 12b and the 12c of annular base plate section of cylindrical portion 12b inboard.
The second retainer 13 is made by aluminum-based metal.The second retainer 13 possesses: looped end board 80, and its contour shape of observing from motor axis L direction is roughly quadrangle; Outer side tube part 81, its from the radial outside of this looped end board 80 partly towards anti-outlet side L1 outstanding (with reference to Fig. 1 (b)); Inside cylindrical section 82, it is outstanding towards anti-outlet side L1 partly from the radially inner side of looped end board 80.
The contour shape of observing from motor axis L direction of outer side tube part 81 is roughly quadrangle (with reference to Fig. 1 (b)), and interior all shapes of outer side tube part 81 are rounded.Thus, so that outer side tube part 81 to be formed thickness thick.Side tube part 81 is provided with circular ring-type fixed part 81a and circular ring-type cap 81b outside, wherein, above-mentioned circular ring-type fixed part 81a embeds stator core 32 in the inboard the opening from cylindrical case 11 is exposed to the fore-end 34a of the circular ledge 34 of outlet side L2, and above-mentioned circular ring-type cap 81b covers the circular outer periphery face 34b between the opening of ring-type fixed part 81a and cylindrical case 11 of the circular ledge 34 of stator core 32 from outer circumferential side.Ring-type fixed part 81a and ring-type cap 81b have fixed width in motor axis L direction respectively.
At this, the internal diameter size of ring-type cap 81b is greater than the internal diameter size of ring-type fixed part 81a, and then the internal diameter size of ring-type cap 81b is also greater than the outside dimension of stator core 32.Therefore, ring-type cap 81b covers circular ledge 34 with the state that is formed with clearance G between the circular outer periphery face 34b of the circular ledge 34 of this ring-type cap 81b and stator core 32 from the outside.In the manner, ring-type cap 81b along in the gamut of motor axis L direction, between circular outer periphery face 34b and ring-type cap 81b, be formed with the gap.The end face 81c of the anti-outlet side L1 of ring-type cap 81b is connected board 11d with second of cylindrical case 11 overlapping and fixed by screw.
Inside cylindrical section 82 possesses in looped end board 80 sides towards interior side-prominent circular board 82a.In inside cylindrical section 82, compare the movable ring 15b that inside part that circular board 82a is in anti-outlet side L1 maintains the second bearing 15.The circular open at circular board 82a center becomes the peristome 82b that rotating shaft 41 is given prominence to towards outlet side L2 from motor field frame 10.
(assembling of motor)
Fig. 4 (a) is the key diagram of the Assembly Action of assembling motor housing 10 and stator 30, and Fig. 4 (b) is the key diagram of the fixed structure of the second retainer 13 on the fore-end 34a of stator core 32.
When assembling motor 1, stator core 32 is to arrange in the form of a ring after the drive coil 33 of having reeled with the state of divided-iron core, and is fixed on the inner peripheral surface of cylindrical case 11 by the methods such as shrink fit (shrink fit) that are installed in cylindrical case 11 inboards after the heating.At this moment, stator 30 is inserted into the inboard of cylindrical case 11 from outlet side L2, and is the state that the part (circular ledge 34) of the outlet side L2 of stator core 32 is exposed from cylindrical case 11.
At this, when by shrink fit stator core 32 being fixed on cylindrical case 11 inboard, cylindrical case 11 keeps stator core 32 with the state towards inboard extruding stator core 32, therefore, stator core 32 is its front warpage one-tenth towards the state of radial outside expansion from cylindrical case 11 outstanding circular ledges 34.But, because the internal diameter size of the ring-type cap 81b of the second retainer 13 is greater than the outside dimension of circular ledge 34, therefore, when the fore-end 34a that makes stator core 32 passes ring-type cap 81b inboard, can prevent or suppress that fore-end 34a contacts with the inner peripheral surface of ring-type cap 81b and with this inner peripheral surface scraping.Therefore, the second retainer 13 is installed in processing ease in the stator core 32.
In addition, in this example, when the fore-end 34a that the second retainer 13 is installed in stator core 32 is upper, become the ring-type fixed part 81a of the second retainer 13 towards the state of the fore-end 34a of inboard extruding stator core 32, suppress thus the warpage of circular ledge 34.At this, when the warpage of the circular ledge 34 that suppresses stator core 32 by ring-type fixed part 81a, the cylindricity of stator core 32 improves, and therefore, the cogging torque (cogging torque) that can suppress motor 1 increases.In addition, because that the outer side tube part 81 of the second retainer 13 is formed thickness is thick, therefore, the rigidity of ring-type fixed part 81a is guaranteed.Thus, the ring-type fixed part 81a of the second retainer 13 can push towards the inboard fore-end 34a of the circular ledge 34 of stator core 32.
After on the fore-end 34a that the second retainer 13 is fixed on stator core 32, rotor 40 is inserted the inboard of stator core 32 from anti-outlet side L1, and by the second bearing 15 rotor 40 is bearing on the second retainer 13.In addition, clutch shaft bearing retainer 12 is fixed on the anti-outlet side L1 of cylindrical case 11, by clutch shaft bearing 14 rotor 40 is bearing on the clutch shaft bearing retainer 12 thus.By like this, stator 30 is the state of the inboard that is configured in motor field frame 10, and rotor 40 is the state that can rotate in the inboard of stator 30.
Then, the anti-outlet side L1 at clutch shaft bearing retainer 12 installs encoder 60.Then, encoder lid 70 is covered on encoder 60 from anti-outlet side L1, and this encoder lid 70 is fixed on the clutch shaft bearing retainer 12.
In addition, in the time of on the circular ledge 34 that the second retainer 13 is installed in stator core 32, also can replace and be pre-formed as the second bearing 15 being installed in the state on the second retainer 13, and the rotor 40 that the second bearing 15 will be installed in advance inserts the inboard of stator 30 from outlet side L2, and when being fixed on the second retainer 13 in the stator core 32 the second bearing 15 is remained on the second retainer 13.
(action effect)
As mentioned above, according to this example, consist of in cylindrical case 11, clutch shaft bearing retainer 12 and second retainer 13 of motor field frame 10, cylindrical case 11 and clutch shaft bearing retainer 12 form by the Ferrious material material, the second retainer 13 is formed by the high aluminum-based metal material of conductive coefficient.Therefore, all compared by the situation that the aluminum-based metal material forms with cylindrical case 11, clutch shaft bearing retainer 12 and the second retainer 13, can suppress the production cost of motor 1.
In addition, since the second retainer 13 be installed in stator core 32 from the fore-end 34a of the outstanding circular ledge 34 of the opening of cylindrical case 11, and should cover by circular ledge 34 from the outside, therefore, by increasing the outstanding size from the outstanding circular ledge 34 of cylindrical case 11 of stator core 32, can enlarge the area of the second retainer 13 covering stator iron cores 32.For example, at outstanding 1/4th when above of stator core 32 total lengths that be of a size of that as this example, makes circular ledge 34, can guarantee the area of the second retainer 13 covering stator iron cores 32.Therefore, can improve the thermal diffusivity of motor 1.
(other execution modes)
In addition, the second retainer 13 is as long as the metal material that is higher than cylindrical case 11 by conductive coefficient forms, and for example, the second retainer 13 can be that metal is made by magnesium also.
The inner peripheral surface that in addition, also can make the inner peripheral surface of ring-type fixed part 81a of the second retainer 13 and ring-type cap 81b is with the form continuity along with the conical surface that tilts to radially inner side towards outlet side L2.
And then, in above-mentioned example, the size from the outstanding circular ledge 34 of cylindrical case 11 of stator core 32 is set as about 1/4th of stator core 32 total lengths, still, two of stator core 32 total lengths/part is given prominence to from cylindrical case 11.In addition, circular ledge 34 is preferably dimensioned to be more than 1/4th of stator core 32 total lengths, and in addition, circular ledge 34 is preferably dimensioned to be below 1/2nd of stator core 32 total lengths.
In addition, in above-mentioned example, adopted the stator core that is consisted of by divided-iron core as stator core 32, still, in the motor 1 of the stator core 32 that also the present invention can be applicable to use complete cycle to be one.
And then, in above-mentioned example, the circular ledge 34 of stator core 32 is arranged on the outlet side L2 of cylindrical case 11, and by the second retainer 13 circular ledge 34 is covered from the outside, but, also can constitute: make stator core 32 also outstanding from the anti-outlet side L1 of cylindrical case 11, and cover from the outside by the second circular ledge that the clutch shaft bearing retainer 12 that is formed by the aluminum-based metal material will protrude from anti-outlet side L1.
Then, in above-mentioned example, stator core 32 is fixed on by shrink fit on the inner peripheral surface of cylindrical case 11, still, also can be pressed into stator core 32 in the cylindrical case 11 and is fixed.In addition, also can be after inserting stator core 32 in the cylindrical cases 11, carry out from the outside towards the ca(u)lk (caulking) of inboard extruding cylindrical case 11 thus be fixed.And then, also can stator core 32 be fixed in the cylindrical case 11 by bonding agent.At this, when stator core 32 is made of divided-iron core, can after being welded in the form of a ring, divided-iron core by bonding agent stator core 32 be fixed in the cylindrical case 11.
In addition, in above-mentioned example, the second retainer 13 is fixed on by shrink fit on the fore-end 34a of stator core 32, still, also can the second retainer 13 be fixed in the stator core 32 by being pressed into.In addition, also can insert at the fore-end 34a with circular ledge 34 after the inboard of ring-type fixed part 81a of the second retainer 13, carry out pushing towards the inboard from the outside ca(u)lk of ring-type fixed part 81a, thus the second retainer 13 is fixed in the stator core 32.And then, also can the fore-end 34a of circular ledge 34 be fixed on by bonding agent the inboard of the ring-type fixed part 81a of the second retainer 13.
And then, in above-mentioned example, enumerated the present invention has been applicable to example in the permanent-magnet type synchronous motor, but, also the present invention can be applicable to such as in other the synchronous motor or induction motor, commutator motor, other motor such as stepping motor or electromagnetic type synchronous motor.
Claims (14)
1. motor, it is provided with:
Stator core, it carries drive coil and in the form of a ring;
Rotor, it is disposed at the inboard of described stator core;
Cylindrical case, it remains in the inboard with described stator core; And
Retainer, it possesses for the bearing that supports described rotor in the mode that can rotate;
Described motor is characterised in that,
Described stator core possesses from the outstanding ledge of the opening of described cylindrical case;
Described retainer is formed by the material that conductive coefficient is higher than described cylindrical case, and described retainer is installed on the fore-end of described ledge of described stator core, and this ledge is covered from the outside.
2. motor as claimed in claim 1 is characterized in that,
Described retainer possesses ring-type fixed part and ring-type cap,
Described ring-type fixed part within it side embeds the described fore-end that described ledge is arranged,
Described ring-type cap covers from the outside to form gapped state between this ring-type cap and this circular outer periphery face at the circular outer periphery face between the described opening of described ring-type fixed part and described cylindrical case described ledge.
3. motor as claimed in claim 2 is characterized in that,
Described ring-type cap along in the gamut of motor axis direction, between the described circular outer periphery face of described ledge and described ring-type cap, be formed with the gap.
4. motor as claimed in claim 2 is characterized in that,
Described retainer possesses end plate section and outer side tube part, and wherein, described end plate section consists of the end on the motor axis direction of described retainer, and described outer side tube part is outstanding towards the motor axis direction partly from the radial outside of described end plate section;
Described ring-type fixed part and described ring-type cap are formed on the described outer side tube part.
5. such as each described motor in the claim 2～4, it is characterized in that,
The internal diameter size of described ring-type cap is greater than the internal diameter size of described ring-type fixed part, and the internal diameter size of described ring-type cap is greater than the outside dimension of described stator core.
6. such as each described motor in the claim 2～4, it is characterized in that the thickness of the described ring-type cap of the Thickness Ratio of described ring-type fixed part is thick.
7. such as each described motor in the claim 2～4, it is characterized in that,
Described cylindrical case keeps described stator core with the state that pushes described stator core towards the inboard;
The described fore-end of described stator core is by the state of the described ring-type fixed part of described retainer towards the inboard extruding.
8. motor as claimed in claim 7 is characterized in that,
The described fore-end of described stator core is by the inboard of shrink fit at the described ring-type fixed part of described retainer.
9. motor as claimed in claim 7 is characterized in that,
Described cylindrical case is made by Ferrious material;
Described stator core is maintained in the described cylindrical case by shrink fit.
10. motor as claimed in claim 9 is characterized in that, described stator core is made of a plurality of stator core sheets of arranging along circumferencial direction.
11. such as each described motor in the claim 1～4, it is characterized in that,
The length dimension of described ledge on the motor axis direction of described stator core is more than 1/4th of length dimension of this stator core.
12. motor as claimed in claim 11 is characterized in that,
The length dimension of described ledge on the motor axis direction of described stator core is below 1/2nd of length dimension of this stator core.
13. such as each described motor in the claim 1～4, it is characterized in that,
Be provided with the second retainer as described retainer, this second retainer possesses the described bearing of the outlet side of the described rotor of supporting,
Described the second retainer is that metal is made by aluminum-based metal or magnesium.
14. motor as claimed in claim 13 is characterized in that,
Be provided with the clutch shaft bearing retainer, this clutch shaft bearing retainer possesses the bearing of the anti-outlet side of the described rotor of supporting,
Described clutch shaft bearing retainer is made by Ferrious material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011142359A JP2013009571A (en) | 2011-06-27 | 2011-06-27 | Motor |
| JP2011-142359 | 2011-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102857055A true CN102857055A (en) | 2013-01-02 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220303147 Expired - Fee Related CN202798403U (en) | 2011-06-27 | 2012-06-26 | Motor |
| CN2012102140638A Pending CN102857055A (en) | 2011-06-27 | 2012-06-26 | Electromotor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220303147 Expired - Fee Related CN202798403U (en) | 2011-06-27 | 2012-06-26 | Motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013009571A (en) |
| CN (2) | CN202798403U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981951A (en) * | 2016-01-15 | 2017-07-25 | 山洋电气株式会社 | Motor |
| CN108233585A (en) * | 2016-12-22 | 2018-06-29 | 日本电产（东莞）有限公司 | Motor and the electric product with the motor |
| CN108429388A (en) * | 2017-02-14 | 2018-08-21 | 日本电产三协（浙江）有限公司 | Motor and pump installation |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013009571A (en) * | 2011-06-27 | 2013-01-10 | Nidec Sankyo Corp | Motor |
| KR20180059033A (en) * | 2016-11-25 | 2018-06-04 | 효성전기주식회사 | Motor For Driving EGR Valve With The Motor Having Improved Stiffness and Assembling |
| KR101987007B1 (en) * | 2019-01-02 | 2019-06-10 | 효성전기주식회사 | Motor For Driving EGR Valve With The Motor Having Improved Stiffness and Assembling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001078381A (en) * | 1999-06-30 | 2001-03-23 | Toto Ltd | Dc brushless motor |
| JP2008017565A (en) * | 2006-07-04 | 2008-01-24 | Hitachi Ltd | Electric motor controller |
| JP2009290915A (en) * | 2008-05-27 | 2009-12-10 | Nidec Sankyo Corp | Motor |
| JP2010273411A (en) * | 2009-05-20 | 2010-12-02 | Mitsubishi Electric Corp | Rotary electric machine and method of manufacturing the same |
| CN202798403U (en) * | 2011-06-27 | 2013-03-13 | 日本电产三协株式会社 | Motor |
-
2011
- 2011-06-27 JP JP2011142359A patent/JP2013009571A/en active Pending
-
2012
- 2012-06-26 CN CN 201220303147 patent/CN202798403U/en not_active Expired - Fee Related
- 2012-06-26 CN CN2012102140638A patent/CN102857055A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001078381A (en) * | 1999-06-30 | 2001-03-23 | Toto Ltd | Dc brushless motor |
| JP2008017565A (en) * | 2006-07-04 | 2008-01-24 | Hitachi Ltd | Electric motor controller |
| JP2009290915A (en) * | 2008-05-27 | 2009-12-10 | Nidec Sankyo Corp | Motor |
| JP2010273411A (en) * | 2009-05-20 | 2010-12-02 | Mitsubishi Electric Corp | Rotary electric machine and method of manufacturing the same |
| CN202798403U (en) * | 2011-06-27 | 2013-03-13 | 日本电产三协株式会社 | Motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981951A (en) * | 2016-01-15 | 2017-07-25 | 山洋电气株式会社 | Motor |
| CN106981951B (en) * | 2016-01-15 | 2020-07-31 | 山洋电气株式会社 | Electric motor |
| CN108233585A (en) * | 2016-12-22 | 2018-06-29 | 日本电产（东莞）有限公司 | Motor and the electric product with the motor |
| CN108429388A (en) * | 2017-02-14 | 2018-08-21 | 日本电产三协（浙江）有限公司 | Motor and pump installation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013009571A (en) | 2013-01-10 |
| CN202798403U (en) | 2013-03-13 |
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Application publication date: 20130102 |