CN203104219U - Motor and disc driving device - Google Patents
Motor and disc driving device Download PDFInfo
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- CN203104219U CN203104219U CN2013200049979U CN201320004997U CN203104219U CN 203104219 U CN203104219 U CN 203104219U CN 2013200049979 U CN2013200049979 U CN 2013200049979U CN 201320004997 U CN201320004997 U CN 201320004997U CN 203104219 U CN203104219 U CN 203104219U
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Abstract
The utility model relates to a motor and a disc driving device. The motor comprises a stationary portion and a rotating portion. The stationary portion includes a stator, a foundation base portion having at least one hole and a flexible wiring substrate; the foundation base portion includes a central portion and a step portion that is extended from the outer edge portion of the central portion towards the outer side of the radial direction and upwardly; and the at least one hole is configured at the step portion. And the flexible wiring substrate reaches a position through the at least one hole, wherein the position, compared with that of the lower surface of the foundation base portion, is closer to the upper side; and the power is supplied for the stator. The flexible wiring substrate has a connecting portion that is configured at the position, which, compared with that of the lower surface of the foundation base portion, is closer to the upper side and is connected with the stator; the lower surface of the connecting portion is provided with a soldering tin portion covering a portion of a leading-out wire of a coil of the stator; and at least one portion of the soldering tin portion is arranged in the hole among the at least one hole.
Description
The application is to be on August 30th, 2012 applying date, and application number is 201220436422.X, and denomination of invention is divided an application for the application for a patent for invention of " motor and disk drive device ".
Technical field
The utility model relates to a kind of electrodynamic type motor.
Background technology
In the past, in disk drive devices such as hard disk drive, be equipped with Spindle Motor.Disclosed brushless motor has mounting panel, lining, stator and circuit substrate in TOHKEMY 2007-295666 communique.Lining is embedded in the fixing hole at the central portion opening of mounting panel.Stator is by being bonded and fixed at the outer peripheral face of lining.Twining 4 winding wires of U phase, V phase, W phase and neutral point at the stator core of stator.Circuit substrate contacts with the axial upper surface of mounting panel.
Circuit substrate has connection pads portion at axial lower surface.Mounting panel has the peristome that connects axially.At least a portion of connection pads portion and peristome be at axial overlap, and expose in the axial outside of lower side.The end of the winding wire of drawing from stator by peristome by being welded to connect in connection pads portion.Scolding tin is positioned at the position than the more close upside of axial lower surface of mounting panel.Compare with the situation of connecting coil lead between rotor and mounting panel, the contacting of the thickness of the scolding tin of needn't worrying or winding wire and rotor, and can dwindle end play between rotor and the mounting panel.
Disclosed motor has housing, coil and power supply substrate in the known technology of TOHKEMY H8-237899 communique.Housing has the leadout hole as through hole.Bottom surface at housing is provided with the power supply substrate across insulator.Be provided with open-work at insulator and power supply substrate.The end of coil connects leadout hole and open-work, and waits the conductive pattern that is engaged in the lower surface that is formed on the substrate of powering by welding.
In recent years, the slimming of disk drive device is by demand, and the slimming of motor is also by demand.The height of the scolding tin on the substrate is generally about 1mm, in TOHKEMY H8-237899 communique, the motor slimming be had scolding tin to the outstanding danger in the below of housing.In TOHKEMY 2007-295666 communique, because thick circuit board is configured in the upper surface of mounting panel, so the slimming of motor becomes difficult.
The utility model content
The motor of the utility model institute example comprises stationary part, has the rotating part and the Bearning mechanism of rotor magnet.Stationary part has stator, basal part and the flexible printed circuit board of the radially inner side that is positioned at rotor magnet.Basal part has at least one hole, and is positioned at the downside of stator.Flexible printed circuit board arrives the position of leaning on upside than the lower surface of basal part by at least one hole, and powers to stator.
The stage portion that basal part has central portion and also extends upward towards radial outside from the outer edge of central portion, at least one hole is configured in stage portion.
Flexible printed circuit board has the guide portion of the lower surface that is configured in basal part and leans on the position of upside and the connecting portion that is connected with stator with the lower surface that is configured in than basal part.Lower surface at connecting portion is provided with the solder sections of covering from the part of the lead-out wire of the coil of stator.At least a portion of solder sections is positioned at the hole at least one hole.
The disk drive device of the utility model institute example has motor, the access portion of the disc spins of making and takes in the casing of dish, motor and access portion.
According to the utility model, can suppress the height of motor.
By the detailed description of following the utility model preferred implementation,, can more be expressly understood above-mentioned and other feature, key element, step, characteristics and advantage of the present utility model with reference to accompanying drawing.
Description of drawings
Fig. 1 is the cutaway view of the related disk drive device of the utility model.
Fig. 2 is the cutaway view of motor.
Fig. 3 is the upward view of base plate and substrate.
Fig. 4 is the cutaway view of the related motor of first execution mode.
Fig. 5 is the cutaway view that amplifies expression substrate patchhole.
Fig. 6 is the cutaway view of the related motor of second execution mode.
Fig. 7 is the upward view of base plate and substrate.
Fig. 8 is the cutaway view of the related motor of the 3rd execution mode.
Fig. 9 is the vertical view that the stator core of the related motor of correlation technique is shown.
Figure 10 is the cutaway view of stator core.
Figure 11 is the vertical view of stator core.
Figure 12 is the vertical view of the stator core of the related motor of other correlation techniques.
Figure 13 is the vertical view of base plate.
Figure 14 is the vertical view of base plate and stator core.
Figure 15 is the vertical view of other examples of expression stator core.
Figure 16 is the cutaway view of the related motor of correlation technique.
Figure 17 is the cutaway view of motor.
Figure 18 is the cutaway view of the related motor of other correlation techniques.
Figure 19 is the vertical view of other examples of expression stator core.
Embodiment
In this manual, will abbreviate " upside " as at the upside of Fig. 1 of the central axial direction of motor, downside abbreviates " downside " as.In addition, above-below direction does not limit position relation and the direction when being assembled into physical device.And, direction that will be parallel or be called " axially " with the direction of central axis almost parallel with central axis, and, will be radially the abbreviating as of center " radially " with the central axis, with the central axis circumferentially the abbreviating as of center " circumferentially ".
Fig. 1 is the longitudinal section that comprises the disk drive device 1 of the related Spindle Motor of the utility model 12.In the following description, Spindle Motor 12 is abbreviated as " motor 12 ".Disk drive device 1 is a hard disk drive for example.Disk drive device 1 can carry at so-called panel computer (Personal Computer personal computer).Disk drive device 1 comprises dish 11, motor 12, access portion 13, casing 14 and clamping part 151.The dish 11 of motor 12 rotation recorded informations.13 pairs of dishes 11 of access portion carry out at least one in the reading and writing of information.
Fig. 2 is the longitudinal section of motor 12.Motor 12 is three-phase motors of outer-rotor type.Motor 12 comprises stationary part 2, rotating part 3 and hydrodynamic pressure bearing mechanism 4.In the following description, hydrodynamic pressure bearing mechanism 4 is abbreviated as " Bearning mechanism 4 ".It is that the center is rotatable with the central axis J1 towards the above-below direction of motor 12 that rotating part 3 is supported for respect to stationary part 2 by Bearning mechanism 4.
Rotating part 3 has rotor hub 31 and rotor magnet 32.Rotor hub 31 has cap 311, roughly side wall portion 312 cylindraceous and dish mounting portion 313.Cap 311 is the position in the form of a ring of extending around central axis J1, and is positioned at the top of stator 22.Side wall portion 312 extends downwards from the outer rim of cap 311.Dish mounting portion 313 extends to radial outside from side wall portion 312.Dish 11 mountings of Fig. 1 are in dish mounting portion 313.Rotor magnet 32 is fixed on the inner peripheral surface of side wall portion 312, and is positioned at the radial outside of stator 22.By providing electric power, between stator 22 and rotor magnet 32, produce torque to stator 22.
Bearning mechanism 4 has axial region 41, sleeve 42, sleeve casing 43, thrust plate 44, seal member 45 and lubricating oil 46.Below, sleeve 42 and sleeve casing 43 are referred to as " bearing portion 40 ".Axial region 41 is the center with central axis J1, extends downwards from the position of the radially inner side of cap 311.Axial region 41 and rotor hub 31 are the parts of one.In the inside of axial region 41, spread all over total length and be provided with internal thread part 411.In the central authorities of cap 311, by the outside nut 152 screw thread combinations of internal thread part 411 and Fig. 1, clamping part 151 is fixed in motor 12.
In motor 12, gap 473 and the cylinder gap 474 of lubricating oil 46 continued presences around the end play 472 between the lower surface of the upper surface of the upper surface of the radial clearance 471 between the outer peripheral face of the inner peripheral surface of sleeve 42 and axial region 41, sleeve 42 and sleeve casing 43 and cap 311, thrust plate 44.474 form the sealing 474a that keeps lubricating oil 46 in the cylinder gap.
On the inner peripheral surface of sleeve 42, have radial dynamic pressure groove group.Upper surface at sleeve 42 is provided with axial hydrodynamic groove group.In radial clearance 471, constitute radial dynamic pressure bearing portion 481 by radial dynamic pressure groove group.In end play 472, constitute axial hydrodynamic bearing portion 482 by axial hydrodynamic groove group.When motor 12 drove, by radial dynamic pressure bearing portion 481 and axial hydrodynamic bearing portion 482, axial region 41 and thrust plate 44 were supported for 40 noncontacts with respect to bearing portion.Thus, rotating part 3 is supported for rotatable with respect to base plate 21 and stator 22.
Fig. 3 only illustrates the base plate 21 of motor 12 and the upward view of substrate 23.In Fig. 3, substrate 23 is indicated narrow at interval parallel oblique line.In following Fig. 7 too.As shown in Figures 2 and 3, the lower surface of base plate 21 has from the outer edge of central portion 211 towards the radial outside and the position 213 of extending upward.Below, position 213 is called " stage portion 213 ".It is the roughly ring-type at center that preferred stage portion 213 is with central axis J1.The position 212 that is positioned at the radial outside of stage portion 213 is positioned at than the position of central portion 211 by the top.Below, position 212 is called " periphery 212 ".In Fig. 3, periphery 212 is indicated wide at interval parallel oblique line.In addition, say exactly that " stage portion " expression has comprised the step-like position on every side at position 213.But, in execution mode, for convenience of description, position 213 is called " stage portion ".The position of the upside of stage portion 213 is corresponding with periphery 212, and the position of the downside of stage portion 213 is corresponding with central portion 211.
Be provided with a plurality of scolding tin accommodation holes 52 at central portion 211.Scolding tin accommodation hole 52 is positioned at than the position of substrate patchhole 51 by radially inner side.As shown in Figure 3, substrate patchhole 51 and stage portion 213 are at axial overlap.And the opening of the downside of substrate patchhole 51 is included in stage portion 213.Fig. 4 is near the cutaway view that amplifies the substrate 23 that the related motor of first execution mode 12 is shown.Substrate patchhole 51 is positioned at than the position of rotor magnet 32 by radially inner side.In addition, the opening of the downside of substrate patchhole 51 also can be included in the position of the upside of stage portion 213.The position that at least a portion of the opening of the downside of substrate patchhole 51 is included in the upside of stage portion 213 or stage portion 213 gets final product.
As shown in Figure 3 and Figure 4, substrate 23 has connecting portion 231 and guide portion 232.It is the roughly circular-arc of center that preferred connecting portion 231 is with central axis J1.Connecting portion 231 has a plurality of fairlead 231b that connect connecting portion 231.Fairlead 231b and scolding tin accommodation hole 52 axial overlaps.Be inserted with lead-out wire 233 at fairlead 231b.
The lower surface of connecting portion 231 shown in Figure 4 is bonded in the peripheral region of the scolding tin accommodation hole 52 in the upper surface 215 of central portion 211, and scolding tin accommodation hole 52 is whole overlapping at above-below direction with connecting portion 231.The upper surface of connecting portion 231 contacts with the bottom of coil 222.In addition, constitute dielectric film, can obtain the insulating properties of 222 of connecting portion 231 and coils at the upper surface of connecting portion 231.Be welded on the lower surface of connecting portion 231 by fairlead 231b from the lead-out wire 223 of coil 222.The solder sections 233 for soldering tin block that the leading section of lead-out wire 223 is set at lower surface covers.Fairlead 231b is blocked by solder sections 233.Solder sections 233 integral body are positioned at scolding tin accommodation hole 52.Preferably whole zone in scolding tin accommodation hole 52 and substrate patchhole 51 have binding agent 24.Thus, prevent that gas is via the inside and outside turnover at disk drive device of scolding tin accommodation hole 52 and substrate patchhole 51.In addition, the integral body of solder sections 233 hole that is positioned at least one hole gets final product.And the zone on every side that the lower surface of connecting portion 213 is bonded at least one hole in the upper surface 215 gets final product.And the whole zone that binding agent is present in the hole at least one hole gets final product.
As shown in Figure 3 and Figure 4, the upper surface of guide portion 232 is configured on the lower surface 216 of stage portion 213 and periphery 212.Guide portion 232 is configured on the lower surface at the position of the upside of stage portion 213 at least and gets final product.The position of upside as described above, corresponding to periphery 212.Preferred guide portion 232 sticks on the lower surface 216 of stage portion 213 and periphery 212 by pressure sensitive adhesive double coated or binding material.The lower surface 216 of periphery 212 and the lower surface 214 of central portion 211, promptly the axial distance between the bottom of base plate 21 is identical or bigger with the axial width of guide portion 232.By this structure, prevent that guide portion 232 from projecting to the position of leaning on the below than the bottom of base plate 21.In addition, the upper surface of guide portion 232 also can be bonded in the lower surface 216 of stage portion 213 and periphery 212 by binding agent.
As described above, because substrate patchhole 51 shown in Figure 4 is positioned at than the position of rotor magnet 32 by radially inner side, can prevent that substrate 23 is near rotor magnet 32.Its result can suppress the magnetic influence to substrate 23 that is caused by rotor magnet 32.And,, can prevent flux leakage to the below of rotor magnet 32 for the plate 321 of the ring-type of magnetic part is configured in the lower surface of rotor magnet 32.By this structure, can further suppress the magnetic influence that causes by rotor magnet 32 to substrate 23.
Fig. 5 is the figure that amplifies the substrate patchhole 51 that base plate 21 is shown.In Fig. 5, omitted the diagram of binding agent 24.In the following description, with the edge of upper surface 215 sides of the central portion 211 of substrate patchhole 51, promptly the edge of connecting portion 231 sides of substrate 23 is called " upper edge 511 ".With the edge of lower surface 216 sides of the periphery 212 of substrate patchhole 51, promptly the edge of guide portion 232 sides of substrate 23 is called " lower edge 512 ".Upper edge 511 has the upper surface 215 of connection central portion 211 and the face with central axis J1 almost parallel of substrate patchhole 51 is the inclined plane 511a of inner peripheral surface 513.Lower edge 512 has the lower surface 216 of connection periphery 212 and the inclined plane 512a of the inner peripheral surface 513 of substrate patchhole 51.
In assembling stationary part 2, guide portion 232 is inserted from the top of substrate patchhole 51, and connecting portion 231 and guide portion 232 are configured in respectively on the lower surface 216 of the upper surface 215 of central portion 211 and periphery 212.Next, stator core 221 shown in Figure 4 inserts stator fixed part 211a, and the lead-out wire 223 of coil 222 inserts the fairlead 231b of connecting portion 231.In scolding tin accommodation hole 52, lead-out wire 223 is welded in connecting portion 231.Solder sections 233 is blocked fairlead 231b.Bonded dose 24 filling in whole zone in the scolding tin accommodation hole 52, scolding tin accommodation hole 52 is plugged.Equally, in the substrate patchhole 51 also bonded dose 24 block.In motor 12,, can easily guide portion 232 be inserted substrate patchhole 51 by inclined plane 511a, 512a being set at substrate patchhole 51.
In motor 12, than the lower surface 214 of the central portion 211 of base plate 21 position by upside, the connecting portion 231 of substrate 23 is connected with stator 22.And the solder sections 233 that is arranged on connecting portion 231 is overlapping at above-below direction with scolding tin accommodation hole 52.By this structure,, can prevent that also solder sections 233 is outstanding from base plate 21 downwards even with motor 12 slimmings.Because the upper surface of connecting portion 231 and lower surface respectively axially contacting with base plate 21 with coil 222, can prevent substrate 23 when above-below direction moves, can position substrate 23.Because substrate patchhole 51 is positioned at than the position of rotor magnet 32 by radially inner side, can prevent guide portion 232 near rotor magnet 32, thereby suppress to influence by the magnetism that rotor magnet 32 causes to substrate 23.
By punch process stage portion 213 is shaped to ring-type, can prevents and the zone of stage portion 213 correspondences of the upper surface of base plate 21 and the distance between the rotor magnet 32 are circumferentially changing.Its result can prevent the generation of the circumferential deviation of the magnetic attraction between base plate 21 and the rotor magnet 32.
Fig. 6 is the cutaway view of the related motor of second execution mode.Fig. 7 only illustrates the base plate 21 of motor 12 and the upward view of substrate 23.Between the edge of the radially inner side of the inner edge portion of the connecting portion 231 of substrate 23 and scolding tin accommodation hole 52, be provided with gap 9.
In assembling stationary part 2, at first, the upper surface of connecting portion 231 shown in Figure 6 is pasted on coil 222, and lead-out wire 223 is welded on the lower surface of connecting portion 231.Next, stator core 221 inserts stator fixed part 211a.At this moment, guide portion 232 is inserted into substrate patchhole 51.Guide portion 232 is configured on the lower surface 216 of periphery 212.Form gap 9 between the edge of the radially inner side of the inner edge portion of connecting portion 231 and scolding tin accommodation hole 52, lead-out wire 223 is positioned at scolding tin accommodation hole 52 by gap 9.And solder sections 233 is positioned at scolding tin accommodation hole 52.The binding agent 24 that preferably filling viscosity is high in scolding tin accommodation hole 52, scolding tin accommodation hole 52 is plugged.Equally, substrate patchhole 51 is blocked for also bonded dose 24.Under situation shown in Figure 6,, and can suppress the height of motor 12 also because solder sections 233 is positioned at scolding tin accommodation hole 52.In addition, the upper surface of connecting portion 231 is pasted on coil 222, but is not limited to this structure.For example, the lower surface of connecting portion 231 also can stick on the upper surface 215 of central portion 211.
Fig. 8 is the cutaway view of the related motor of the 3rd execution mode.At base plate 21 a big substrate patchhole 53 is set.Connecting portion 231 sticks on the bottom of coil 222, and guide portion 232 is configured in the downside of base plate 21 by substrate patchhole 53.The lead-out wire 223 of drawing from coil 222 is welded on the lower surface of connecting portion 231.A plurality of solder sections 233 all are positioned at substrate patchhole 53.Like this, in Fig. 8, substrate patchhole 51 also can be used as the scolding tin accommodation hole and plays a role.
Like this, in motor 12,, connecting portion 231 can be configured in the position of leaning on upside than the lower surface of base plate 21, and guide portion 232 be guided to the lower surface of base plate 21 because base plate 21 has at least one in the hole that above-below direction connects.And, can make solder sections 233 be positioned at the hole owing to have at least one hole.By such structure, can realize the slimming of motor 12.In following execution mode and correlation technique too.
Fig. 9 is the vertical view that the stator core 221a of the related motor of correlation technique is shown.Structure in the motor except stator core 221a is identical with motor shown in Figure 2 12.Stator core 221a has the iron core back 61 and a plurality of tooth portion 62 of ring-type.At this, iron core back 61 is meant among stator core 221a, at the position than the ring-type of inner position by radially inner side, the gap between the tooth portion 62.Figure 10 is the cutaway view after the position of arrow A shown in Figure 9 cuts off stator core 221a.In addition, the radial outside of the corresponding stator core 221a in the right side of Figure 10.Stator core 221a has many electromagnetic steel plates 220, each electromagnetic steel plate 220 moulding by punch process.Below, electromagnetic steel plate 220 is called " iron core member 220 ".
Utilize binding agent to be fixed on the outer peripheral face of the stator fixed part 211a of Fig. 2 as Fig. 9 and iron core back 61 shown in Figure 10.Tooth portion 62 extends to radial outside from iron core back 61.Tooth portion 62 has winding portion 621, terminal part 622 and wide width part 623.Preferred winding portion 621 is the roughly linearity that radially extends, and is formed with the coil of representing with two chain-dotted lines among Figure 10 222 around.Terminal part 622 extends to circumferential both sides from the end of the radial outside of winding portion 621.Wide width part 623 be between winding portion 621 and iron core back 61 with the continuous position in winding portion 621 and iron core back 61.Terminal part 622 is compared with winding portion 621 with wide width part 623, and circumferential width is big.
Winding portion 621 has by riveted joint makes a plurality of iron core member 220 caulking part 621a fastened to each other.Iron core back 61 has caulking part 611 and notch 612 shown in Figure 9.Caulking part 611 makes iron core member 220 fastened to each other by riveted joint.In stator core 221a, by in winding portion 621 and iron core back 61 caulking part 621a, 611 being set respectively, iron core member 220 is firmly fixed mutually, can prevent the separating of iron core member 220 at tooth portion 62 and 61 places, iron core back.
As shown in Figure 9, notch 612 caves in to radial outside from the inner peripheral surface at iron core back 61.Notch 612 becomes the circumferential witness marker of iron core member 220 in the iron core member 220 of the Figure 10 that axially superposes.Between adjacent wide width part 623, slit 625 radially extends.Slit 625 and the groove gap 626 that forms between adjacent terminal part 622 are radially overlapping.The circumferential Breadth Maximum of slit 625 is than the width in groove gap 626, and promptly minimum widith is little.In addition, the Breadth Maximum of slit 625 also can equate with the width in groove gap 626.
As shown in figure 10, wide width part 623 has from iron core back 61 towards radial outside and the rake 624 that extends upward.Below, with the face 624a of the upside among Figure 10 of rake 624, promptly normal is that the face that radially inner side tilts is called " upper surface 624a " towards the top and to the left side of Figure 10.Rake 624 makes stator core 221a bending and moulding by utilizing punch process.Thinner with the thickness of the rake 624 of the direction of the upper surface 624a approximate vertical of rake 624 than the axial width at winding portion 621 and iron core back 61.More precisely, the aggregate thickness at the position of the formation rake 624 of a plurality of iron core members 220 is than the aggregate thickness at the position of the formation winding portion 621 of iron core member 220 and to form the aggregate thickness at position at iron core back 61 thin.Its result, in fact the thickness attenuation of the rake 624 that uses as magnetic circuit.
Figure 11 is the figure that amplifies the tooth portion 62 of the upside that Fig. 9 is shown.The inner edge portion 624b of rake 624 is positioned at than the inner edge portion 623b that is positioned at wide width part 623, and the position between the inner of two promptly adjacent slits 625 is by the position of radial outside.In Figure 11, dot the inner edge portion 623b of wide width part 623.It is the circular-arc of center that the outer edge 624c of preferred angled portion 624 and the outer edge 623c of wide width part 623 are with central axis J1.The circumferential width of terminal part 622 is wideer than the equidirectional Breadth Maximum of wide width part 623.When overlooking, the side end 623a of the circumferential both sides of wide width part 623 is positioned on the straight line L1 of the end 622a of the circumferential both sides that connect terminal part 622 and central axis J1.
In stator core 221a, as shown in figure 10, owing to be provided with rake 624, terminal part 622 is positioned at than the position of iron core back 61 by upside.By this structure, can make the axial scope that exists of terminal part 622 radially overlapping with the axial location of the magnetic center of the rotor magnet of representing with double dot dash line 32.
As mentioned above, the thickness of the direction vertical with the upper surface 624a of rake 624 is thinner than the axial width at winding portion 621 and iron core back 61.But,, can access the magnetic circuit of stator core 221a owing to the circumferential width of rake 624 is guaranteed.And, can access the intensity of tooth portion 62, the vibration that can lower stator 22.In motor 12,, can prevent that the volume of coil 222 is random because wide width part 623 is set.
Because the inner edge portion 624b of rake 624 is positioned at the position of leaning on radial outside than the inner edge portion 623b of wide width part 623, compares with the stator core that slit is not set, and can easily bend stator core 221a.
Figure 12 is the figure that amplifies the tooth portion 62 of the stator core 221b that the related motor of other correlation techniques 12 is shown.When overlooking, the straight line L2 almost parallel of the side end 623a of the circumferential both sides of wide width part 623 and the central authorities that are connected central axis J1 and terminal part 622.The outer edge 624c of rake 624 and the outer edge 623c of wide width part 623 are the linearity with respect to straight line L2 approximate vertical when overlooking.
Figure 13 is the vertical view that the central portion 211 of base plate 21 is shown.In Figure 13, to the parallel oblique line of upper surface 215 signs of base plate 21.In following Figure 14 too.Central portion 211 has from the outstanding upward a plurality of protuberances 217 of upper surface 215.Protuberance 217 moulding by half Punching Technology of base plate 21.Be that angle between two adjacent protuberances 217 of center is 90 degree or greater than 90 degree preferably with central axis J1, and less than 180 degree.Other structures of motor 12 are identical with motor 12 shown in Figure 2.
Figure 14 is the vertical view of the state when stator core 221b being shown being installed in base plate 21.Slit 625 between the wide width part 623 of protuberance 217 insertion stator core 221b.Protuberance 217 is positioned at the position of leaning on radially inner side than the inner edge portion 624b of rake 624, and contacts circumferential with the side end 623a of wide width part 623.By this structure, can easily in the face vertical, carry out the location of stator core 221b with respect to base plate 21 with central axis J1.
In stator core 221b,, thereby can obtain the magnetic circuit of stator core 221b also owing to guaranteed the circumferential width of rake 624.And, can obtain the intensity of tooth portion 62.In following execution mode and correlation technique too.
In motor 12,, need not utilize instrument to carry out the positioning operation of stator core 221b with respect to base plate 21 even between iron core back 61 and stator fixed part 221a, exist under the situation in gap yet.By this structure, can carry out the assembling of motor 12 efficiently.Particularly, be shaped to by punch process at the base plate 21 that comprises stator fixed part 221a under the situation of parts of one, the form error of stator fixed part 211a is big, and it is necessary having the gap between iron core back 61 and stator fixed part 211a.Therefore, protuberance 217 is suitable for base plate 21 by punch process and the situation of moulding.
Figure 15 is the vertical view that the related stator core 221c of other examples is shown.In stator core 221c, omitted wide width part from tooth portion 62.Stator core 221c has the iron core back 61 of ring-type, a plurality of tooth portion 62 and a plurality of jut 65.Jut 65 extends to radially inner side from iron core back 61 in the face vertical with central axis J1.Jut 65 utilizes binding agent to be fixed on the outer peripheral face of the stator fixed part 211a of Fig. 4.Jut 65 axially contacts with the upper surface 215 of base plate 21.
Iron core back 61 is towards radial outside and the rake 624 that extends upward.Same with the rake 624 of Figure 10, thinner than the axial width of winding portion 621 with the thickness at the iron core back 61 of the direction of the upper surface approximate vertical at iron core back 61.Owing to be provided with iron core back 61 into rake 624, same with the situation of Figure 10, can make terminal part 622 at the axial location at the axial magnetism center that has scope and rotor magnet 32 radially overlapping.
Figure 16 is the cutaway view of the related motor of correlation technique 12.In motor 12, among the stator core 221d, constituting in iron core back 61 and the wide width part 623 than the upper end of rake 624 is two by the quantity of the iron core member 220 at the position of radially inner side.Constituting in winding portion 621, terminal part 622 and the wide width part 623 than the upper end of rake 624 is five by the quantity of the iron core member 220 at the position of radial outside.Other structures of stator core 221d are identical with stator core 221a shown in Figure 10.
Than position 63, the lower end of the rake 624 of stator core 221d,, be configured in the downside of the wheel hub tube portion 314 of rotor hub 31 promptly than rake 624 position in the inner part of wide width part 623 by radially inner side.Below, position 63 is called " interior perimembranous 63 ".Iron core back 61 axially contacts with the projection 218 of the upper surface 215 of the central portion 211 that is arranged on base plate 21.The upper end of stator fixed part 211a is positioned at the inboard of wheel hub tube portion 314 and leans on the position of upside than the lower end of wheel hub tube portion 314.The bottom of the inner peripheral surface of wheel hub tube portion 314 has towards the below to the inclined plane 314a of radial outside inclination.The top of the outer peripheral face of stator fixed part 211a has towards the below to the inclined plane 211b of radial outside inclination.
Between the inclined plane 211b of the inclined plane 314a of wheel hub tube portion 314 and stator fixed part 211a, form the slanted gap 71 that tilts to radial outside towards the below.Below, slanted gap 71 is called " first communication gap 71 ".The lower end of wheel hub tube portion 314 and and the interior perimembranous 63 of wheel hub tube portion 314 at axial opposed stator core 221d between, form second communication gap 72 that radially extends from first communication gap 71.The radial width of preferred second communication gap 72 is than the radial width at the iron core back 61 of Fig. 9, and promptly the radial width between the inner of the inner edge portion at iron core back 61 and slit 625 is big slightly.
In sleeve casing 43, the top of the outer peripheral face of cylindrical portion 431 be provided with towards below the inclined plane 431a that tilts to radially inner side.Between the inner peripheral surface of inclined plane 431a and wheel hub tube portion 314, form cylinder roughly cylindraceous gap 474.The sealing 474a at the place, interface of 474 formation lubricating oil 46 in the cylinder gap.Cylinder gap 474 is connected with the space on every side of stator 22 with second communication gap 72 by first communication gap 71.The width of preferred first communication gap 71 is littler than the radially Breadth Maximum in the cylinder gap 474 at the 431b place, lower end of inclined plane 431a.
In motor 12,, can suppress lubricating oil 46 and evaporate from sealing 474a by first communication gap 71 and second communication gap 72 are set.Because the width of first communication gap 71 is littler than the radially Breadth Maximum in cylinder gap 474, can further suppress the evaporation of lubricating oil 46.
By making the axial width attenuation at iron core back 61, narrow spatial configuration iron core back 61 that can be between wheel hub tube portion 314 and base plate 21, and can be with motor 12 miniaturizations.And, thicker by the axial width that makes winding portion 621 than the axial width at iron core back 61, can improve electromagnetic property.
Figure 17 is the figure that the related motor of other correlation techniques 12 is shown.In motor 12, between the top of the outer peripheral face of the bottom of the inner peripheral surface of wheel hub tube portion 314 and stator fixed part 211a, form i.e. first communication gap 73 in axially extended vertical gap.The axial width of the width radially of first communication gap 73 and second communication gap 72 is narrower than the radially Breadth Maximum in cylinder gap 474.By this structure, can further suppress lubricating oil 46 474 evaporations from the cylinder gap.
Figure 18 is the figure that the related motor of other correlation techniques 12 is shown.It is bearing portion 49 that the Bearning mechanism 4a of motor 12 has a sleeve that is formed by metal.Between the outer peripheral face of the inner peripheral surface of bearing portion 49 and axial region 41, form radial clearance 471.At the upside of radial clearance 471, between the top of the outer peripheral face of the top of the inner peripheral surface of bearing portion 49 and axial region 41, form sealing 475.The stator fixed part 211a of base plate 21 is inserted in the bottom of the outer peripheral face of bearing portion 49.Between the wheel hub tube portion 314 of the top of outer peripheral face and rotor hub 31, form cylinder roughly cylindraceous gap 474.Cylinder gap 474 is connected with sealing 475 by gap 642.Gap 642 the upper surface of bearing portion 49 and than the wheel hub tube portion 314 of the cap 311 of rotor hub 31 by radial extension between the lower surface of radially inner side.Other structures of motor 12 are identical with motor 12 shown in Figure 16.
In motor 12,, therefore can further suppress lubricating oil 46 from sealing 475 evaporations owing between the space around sealing 475 and the stator 22, gap 642, cylinder gap 474, first communication gap 71 and second communication gap 72 are set.In motor 12, same with Figure 17, also can form i.e. first communication gap 73 in vertical gap.
More than, execution mode of the present utility model is illustrated, but the utility model is not limited to above-mentioned execution mode, can carry out various changes.For example, in the above-described embodiment, the position that contacts with connecting portion 231 at least in the upper edge 511 of substrate patchhole 51 is provided with inclined plane 511a and gets final product, and the position that contacts with guide portion 232 at least in lower edge 512 is provided with inclined plane 512a and gets final product.By this structure, can easily guide portion 232 be inserted substrate patchhole 51.And, also can replace inclined plane 511a and 512a at the flexure plane that upper edge 511 and lower edge 512 are provided with convex respectively.
The opening that substrate patchhole 51 also can be set to its downside is included in the periphery 212 of the radial outside that is positioned at stage portion 213.And as long as guide portion 232 is configured in the lower surface of periphery 212 by substrate patchhole 51, at least a portion of the opening of the downside of substrate patchhole 51 also can only be included in stage portion 213 or periphery 212.In motor 12, because at least a portion of solder sections 233 is positioned at the scolding tin accommodation hole, so can suppress the height of motor 12.In addition, both can be that the part of solder sections 233 is positioned at the scolding tin accommodation hole, also can be the integral body of solder sections 233 is positioned at the scolding tin accommodation hole.
In motor shown in Figure 4 12, the connecting portion 231 of substrate 23 also Pasting in the bottom of coil 222.In this case, before stator 22 and substrate 23 were installed in base plate 21, the upper surface of connecting portion 231 was secured at coil 222, and lead-out wire 223 is welded on the lower surface of connecting portion 231.And fairlead 231b and solder sections 233 needn't one fix on axial overlap.In this case, fairlead is blocked with binding agent etc. and is got final product.And, the lower surface of connecting portion 231 also Pasting at the upper surface 215 of central portion 211.In this case, preferably after the lower surface of connecting portion 231 sticks on the upper surface of central portion 211, stator 22 is installed in base plate 21.
In the above-described embodiment, also can notch be set, lead-out wire 223 be guided to the lower surface of connecting portion 231 by notch at connecting portion 231.In motor 12, necessarily bonded dose 24 filling in the scolding tin accommodation hole 52 also can be by blocking the leakage that scolding tin accommodation hole 52 prevents gas with seal member 45.And seal member 45 contacts with solder sections 233, and utilizes seal member 45 that solder sections 233 is pushed upward also can.By this structure, can prevent that solder sections 233 from overflowing from scolding tin accommodation hole 52.
In motor shown in Figure 2 12, axial region 41 can be different parts with rotor hub 31.In this case, axial region 41 is fixed in rotor hub 31 by being pressed into etc.In Fig. 2 and motor 12 shown in Figure 16, axial hydrodynamic groove group also can be arranged on the upper surface of the cylindrical portion 431 of sleeve casing 43.In above-mentioned correlation technique, stator core also can be fixed in stator fixed part 211a indirectly by the parts of ring-type.
The gimmick that the scolding tin accommodation hole is set at base plate is also applicable to the motor of the large-scale disk drive device that carries many dishes.
In stator core 221a, as shown in figure 19, when overlooking, the side end 621b of the circumferential both sides of the winding portion 621 of tooth portion 62 also can be towards the mode bending of radial outside from the circumferential both sides extension of the mediad of winding portion 621.Side end 621b is connected with the end 622a of the circumferential both sides that are positioned at terminal part 622.The circumferential width of wide width part 623 and terminal part 622 is that the width at position of radially inner side is big than winding portion 621 the narrowest positions.Even have the stator core 221a of tooth portion 62 shown in Figure 19,, also can obtain the magnetic circuit in the stator core 221a by wide width part 623 is set.In addition, because the circumferential minimum widith of the circumferential width of terminal part 622 and wide width part 623 is bigger than the minimum widith of winding portion 621, can prevent effectively that magnetic flux is saturated.More preferably the circumferential minimum widith of the circumferential width of terminal part 622 and wide width part 623 is bigger than the Breadth Maximum of winding portion 621.In above-mentioned other correlation techniques too.
In stator core 221a, when overlooking, the side end 623a of wide width part 623 is positioned on the straight line L1 of the end 622a of the circumferential both sides that connect terminal part 622 and central axis J1, but also can be positioned at than straight line L1 by week laterally, promptly clip the position of straight line L1 and a central opposite side of terminal part 622.The inner of slit 625 also can be positioned at the position of leaning on radial outside than the inner edge portion 624b of rake 624 slightly.In stator core 221a, the integral body that also can be wide width part 623 is rake.Also can be same with Figure 14, will be arranged on the protuberance 217 of base plate 21 insert slits 625, be secured in position with respect to base plate 21 with the stator core 221a of the face of central axis J1 approximate vertical.
The quantity of the protuberance 217 of base plate 21 is not defined as three, yet plural other quantity.In preferred a plurality of protuberance 217, one group of adjacent at least protuberance is spent or is spent less than 180 greater than 90 degree for 217 one-tenth 90.When the quantity of protuberance 217 is two, be that angle between two protuberances 217 at center is about 180 degree preferably with central axis J1.As protuberance, also can use the pin that is inserted in the through hole that is arranged on base plate 21.Also plural notch 612 can be set at iron core back 61.In this case, also the projection that is arranged on base plate 21 can be inserted notch 612, thereby in the position of the face fixed stator iron core 221a vertical with central axis J1 with respect to base plate 21.
In stator core 221c shown in Figure 15, the part that also can be only iron core back 61 is the rake of ring-type.To the motor 12 shown in Figure 180, constitute in the iron core back 61 of stator core 221d and the wide width part 623 quantity than the iron core member 220 at the position in the inner part, upper end of rake 624 at Figure 16 except that two, also can be three or four.And if first communication gap 71,73 and second communication gap 72 can be set, the axial thickness at tooth portion 62 and iron core back 61 also can be identical.
The structure of above-mentioned execution mode, correlation technique and each variation only otherwise contradiction can suitably make up mutually.
The utility model can either use as the motor of disk drive device, also can use as the motor beyond the disk drive device.
Only otherwise can cause conflict, then the top illustrated preferred implementation and the feature of mode of texturing suitably can be combined.
Though preferred implementation of the present utility model has been described in the above, but under the situation that does not break away from scope and spirit of the present utility model, can change and be out of shape, this will become apparent to those skilled in the art that scope of the present utility model only determined by claim.
Claims (28)
1. a motor is characterized in that, this motor comprises:
Stationary part;
Rotating part, it has rotor magnet; And
Bearning mechanism, it is supported for described rotating part can be the center rotation with the central axis towards above-below direction with respect to described stationary part,
Described stationary part has:
Stator, it is positioned at the radially inner side of described rotor magnet;
Basal part, it has at least one hole, and is positioned at the downside of described stator; And
Flexible printed circuit board, it arrives the position of leaning on upside than the lower surface of described basal part by described at least one hole, and to described stator power supply,
Described basal part has:
Central portion; And
Stage portion, also extend upward towards radial outside its outer edge from central portion,
Described at least one hole is configured in described stage portion,
Described flexible printed circuit board has:
Guide portion, it is configured in the lower surface of described basal part; And
Connecting portion, it is configured in the position of leaning on upside than the lower surface of described basal part, and is connected with described stator,
Described connecting portion has the solder sections of covering from the part of the lead-out wire of the coil of described stator at its lower surface,
At least a portion of described solder sections is positioned at the hole in described at least one hole.
2. motor according to claim 1 is characterized in that,
Described at least one hole has:
Substrate patchhole, described flexible printed circuit board are inserted into this substrate patchhole;
The scolding tin accommodation hole, itself and described solder sections are overlapping.
3. motor according to claim 2 is characterized in that,
Binding agent is present in the whole zone in the described scolding tin accommodation hole.
4. according to claim 2 or the described motor of claim 3, it is characterized in that,
The integral body of described solder sections is positioned at described scolding tin accommodation hole.
5. according to claim 1 each described motor to the claim 3, it is characterized in that,
The integral body of described solder sections is positioned at the hole in described at least one hole.
6. motor according to claim 2 is characterized in that,
Described connecting portion has fairlead, and described lead-out wire is inserted into this fairlead,
Described solder sections is blocked described fairlead.
7. motor according to claim 6 is characterized in that,
Described connecting portion be bonded in described scolding tin accommodation hole in the described upper surface of described basal part around the zone.
8. according to claim 1 each described motor to the claim 3, it is characterized in that,
Described connecting portion be bonded in described at least one hole in the described upper surface of described basal part around the zone.
9. according to claim 6 or the described motor of claim 7, it is characterized in that,
Described fairlead and described scolding tin accommodation hole are at axial overlap.
10. according to claim 6 or the described motor of claim 7, it is characterized in that,
Binding agent is present in the whole zone in the described scolding tin accommodation hole.
11. according to claim 1 each described motor to the claim 3, it is characterized in that,
Binding agent is present in the whole zone in the hole in described at least one hole.
12. according to claim 2 or the described motor of claim 3, it is characterized in that,
Described substrate patchhole is positioned at than the position of described rotor magnet by radially inner side.
13. motor according to claim 12 is characterized in that,
Described scolding tin accommodation hole is positioned at than the position of described substrate patchhole by radially inner side.
14. according to claim 2 or the described motor of claim 3, it is characterized in that,
The edge of the described upper surface side of the described basal part of described substrate patchhole is at least at the position that joins with described connecting portion, has the inclined plane or the flexure plane of the described upper surface of the medial surface that connects described substrate patchhole and described basal part.
15. according to claim 2 or the described motor of claim 3, it is characterized in that,
The edge of the described lower face side of the described basal part of described substrate patchhole is at least at the position that joins with described guide portion, has the inclined plane or the flexure plane of the described lower surface of the described medial surface that connects described substrate patchhole and described basal part.
16. according to claim 2 or the described motor of claim 3, it is characterized in that,
Described substrate patchhole is blocked for bonded dose.
17. motor according to claim 2 is characterized in that,
At least a portion of the opening of the downside of described substrate patchhole is included in the position of the upside of described stage portion or described stage portion,
Described guide portion is configured on the lower surface at position of described upside of described stage portion.
18. motor according to claim 17 is characterized in that,
Described basal part is to pass through punch process and the parts of moulding by plate member,
It is the ring-type at center that described stage portion is with described central axis.
19. according to claim 17 or the described motor of claim 18, it is characterized in that,
Described basal part has:
Central portion, it is positioned at the radially inner side of described stage portion; And
Periphery, it is positioned at the radial outside of described stage portion,
Described periphery is positioned at than the position of described central portion by the top,
The upper surface of described guide portion is configured on the lower surface of described stage portion and described periphery.
20. motor according to claim 19 is characterized in that,
The lower surface of described periphery is identical or bigger than the axial width of described guide portion with the axial width of described guide portion with axial distance between the bottom of described basal part.
21. motor according to claim 1 is characterized in that,
The lower surface of described basal part has the stage portion of also extending upward towards radial outside,
At least a portion of the opening of the downside in described at least one hole is included in the position of the upside of described stage portion or described stage portion,
Described guide portion is configured on the lower surface at position of described upside of described stage portion.
22. motor according to claim 21 is characterized in that,
Described basal part has:
Central portion, it is positioned at the radially inner side of described stage portion; And
Periphery, it is positioned at the radial outside of described stage portion,
Described periphery is positioned at than the position of described central portion by the top,
The upper surface of described guide portion is configured on the lower surface of described stage portion and described periphery.
23. motor according to claim 22 is characterized in that,
The lower surface of described periphery is identical or bigger than the axial width of described guide portion with the axial width of described guide portion with axial distance between the bottom of described basal part.
24. according to claim 1 each described motor to the claim 3, it is characterized in that,
Between the edge of the radially inner side in the inner edge portion of described connecting portion and described at least one hole, be provided with the gap.
25. motor according to claim 24 is characterized in that,
Described lead-out wire is in the hole of described gap configuration in described at least one hole.
26. according to claim 1 each described motor to the claim 3, it is characterized in that,
Described at least one hole comprises a substrate patchhole, and described flexible printed circuit board is inserted into this substrate patchhole,
And, dispose described solder sections at a described substrate patchhole.
27. according to claim 1 each described motor to the claim 3, it is characterized in that,
Described at least one hole comprises a plurality of substrate patchholes, and described flexible printed circuit board is inserted into described a plurality of substrate patchhole,
And, dispose described solder sections respectively at described a plurality of substrate patchholes.
28. a disk drive device is characterized in that, this disk drive device comprises:
Claim 1 each described motor to the claim 27, it makes disc spins;
Access portion, its described dish is carried out reading of information and write at least one; And
Casing, it takes in described dish, described motor and described access portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011188363 | 2011-08-31 | ||
| JP2011-188363 | 2011-08-31 | ||
| JP2011-247828 | 2011-11-11 | ||
| JP2011247828A JP2013066358A (en) | 2011-08-31 | 2011-11-11 | Motor and disk driving device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220436422XU Division CN202840835U (en) | 2011-08-31 | 2012-08-30 | Motor and disc drive unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203104219U true CN203104219U (en) | 2013-07-31 |
Family
ID=48189333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200049979U Expired - Fee Related CN203104219U (en) | 2011-08-31 | 2012-08-30 | Motor and disc driving device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013066358A (en) |
| CN (1) | CN203104219U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107369382A (en) * | 2016-04-28 | 2017-11-21 | 乐金显示有限公司 | Rollable display device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013251937A (en) | 2012-05-30 | 2013-12-12 | Nippon Densan Corp | Motor and fan |
| JP6092089B2 (en) * | 2013-12-24 | 2017-03-08 | ミネベアミツミ株式会社 | DC motor with brush |
-
2011
- 2011-11-11 JP JP2011247828A patent/JP2013066358A/en active Pending
-
2012
- 2012-08-30 CN CN2013200049979U patent/CN203104219U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107369382A (en) * | 2016-04-28 | 2017-11-21 | 乐金显示有限公司 | Rollable display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013066358A (en) | 2013-04-11 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20210830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |