CN203760079U - Motor and disc drive device - Google Patents
Motor and disc drive device Download PDFInfo
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- CN203760079U CN203760079U CN201420085064.1U CN201420085064U CN203760079U CN 203760079 U CN203760079 U CN 203760079U CN 201420085064 U CN201420085064 U CN 201420085064U CN 203760079 U CN203760079 U CN 203760079U
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Abstract
The utility model relates to a motor and a disc drive device. The motor is provided with a stationary part and a rotating part. With a central shaft line serving as the center, the rotating part can rotate relative to the stationary part. The rotating part has a wheel hub body part which is roughly shaped like a round disc and a shaft which extends along the axial direction. The wheel hub body part has a wheel hub penetrating hole and a wheel hub recessed part. The wheel hub penetrating hole runs through the wheel hub body part, and the shaft is fixed in the wheel hub penetrating hole. The wheel hub recessed part annularly expands from the outer side face of the shaft to the radial outer side. The wheel hub recessed part is recessed toward a lower axial side. The wheel hub recessed part is provided with a first ridge part, a second ridge part and a third ridge part. The first ridge part is an edge that forms the inner side face of the upper axial side of the wheel hub penetrating hole. The second ridge part is roughly shaped like a ring and is arranged at the radial outer side of the first ridge part. The third ridge part is roughly shaped like a ring. The third ridge part is arranged at the radial outer side of the second ridge part, and the third ridge part is positioned a place which is axially upper than the first ridge part and the second ridge part. Along the whole circumferential direction, a bonding agent covers a border between the first ridge part and the outer side face of the shaft. The bonding agent covers the outer side face of the shaft and reaches at least a part of the second ridge part.
Description
Technical field
The utility model relates to a kind of motor and disk drive device.
Background technology
In the past, in the disk drive devices such as hard disk drive, carried the Spindle Motor that makes disc spins.Disk drive device has dish, casing, stator and flexible printed board (FPC) etc.Casing has outer cover part and basal part etc.
In recent years, disk drive device requires more slim and miniaturization.Particularly in order to make the slimming more of small-sized disk drive device, need to make casing or be configured in motor self attenuation of casing inside.Motor generally has rotor hub, axle, stator, basal part and bearing etc.In assembling when motor, these parts are to configure in the mode of axial overlap respectively.For making motor self attenuation, need to make these each parts attenuation respectively.
At this, to be fixed in the motor of type of rotor hub at axle, when the thickness attenuation of rotor hub, the position of the stationary shaft of rotor hub also shortens.Consequently, exist axle can not fully be fixed on the risk of rotor hub.Therefore, the bonding agent of the fixed position application of liquid state between rotor hub and axle.
Bearing is configured in the lower face side of rotor hub.Use hydrodynamic pressure bearing during as bearing, due to the impact being subject to from outside etc., lubricating oil likely escapes to the upper surface side of rotor hub from the fixed position between rotor hub and axle.Therefore,, for lubricating oil is not spilt, need to seal the structure of fixed position.
Utility model content
Motor has stationary part and rotating part.Rotating part can relatively rotate with respect to stationary part centered by central axis.Rotating part has roughly discoid hub body portion and the vertically axle of extension.Hub body portion has wheel hub through hole and wheel hub recess.Wheel hub through hole connects hub body portion, and axle is fixed in described wheel hub through hole.Wheel hub recess is expanded to radial outside in the form of a ring from the lateral surface of axle.Wheel hub recess caves in to axial downside.Wheel hub recess has the first spine, the second spine and the 3rd spine.The first spine is the edge that forms the medial surface of the axial upside of wheel hub through hole.The second spine is roughly ring-type, and is configured in the radial outside of the first spine.The 3rd spine is roughly ring-type.The 3rd spine is configured in the radial outside of the second spine, and is positioned at the position by axial upside than the first spine and the second spine.Bonding agent is along the border between the lateral surface of whole circumferential covering the first spine and axle.Bonding agent covers the lateral surface of axle and arrives at least a portion of the second spine.
In described motor, the width radially of bonding agent is less than axial thickness.
In described motor, the 3rd spine is configured in the position by axial upside than described the second spine.
In described motor, bonding agent covers the edge of the upper end periphery of described axle.
In described motor, the height of the second spine is identical with the height of the upper end of axle, or higher than the upper end of axle.
In described motor, wheel hub recess has the first joint face that extends and surround the first spine from described the first spine to radial outside.
In described motor, in the axial direction, the position of the first joint face is identical or lower than the position of the second spine with the position of the second spine.
In described motor, wheel hub recess has to the ring-type slot part of axial downside depression between the second spine and the 3rd spine.And wheel hub recess has the 4th spine of the ring-type being configured in ring-type slot part.And in the axial direction, the position of the second spine is identical with the 4th spine.The bottom of ring-type slot part is positioned at the position by axial downside than the second spine.
In described motor, in the axial direction, the position of described the first spine is identical with the position of described the second spine.
In described motor, the position configuration of the first spine is than the position of side on the lower, the upper end of axle.
In described motor, in the axial direction, the position configuration of the 3rd spine is in the position of the top side in upper end than axle.
In described motor, by the upper end of described axle is inserted in described wheel hub through hole, and make border between the lateral surface of described the first spine and described axle by bonding agent along whole circumferential covering, and form bonding closure.
Disk drive device has described motor, dish, magnetic head, actuator and casing.Dish rotates by motor.During what magnetic head coiled read and write at least one.Actuator drives magnetic head.Built-in motor, dish, magnetic head and actuator in casing.
About feature, key element, means, effect and the feature of the above and other of the present utility model, with reference to the accompanying drawings, by the detailed explanation of following preferred implementation of the present utility model, make it clearer and more definite.
Brief description of the drawings
Fig. 1 is the cut-open view of the related disk drive device of the application's utility model.
Fig. 2 is the cut-open view of the motor in the related preferred implementation of the application's utility model.
Fig. 3 is the partial enlarged drawing of the motor in the related preferred implementation of the application's utility model.
Fig. 4 is the partial enlarged drawing of the motor in the related preferred variant of the application's utility model.
Fig. 5 is the partial enlarged drawing of the motor in the related preferred variant of the application's utility model.
Embodiment
In this manual, by the upside in the central axial direction of motor of Fig. 1, referred to as " upside ", downside is referred to as " downside ".In addition, above-below direction does not represent position relationship and the direction while being assembled into physical device.And, the direction of the direction parallel with central axis or almost parallel is called to " axially ", centered by central axis radially referred to as " radially ", centered by central axis circumferentially referred to as " circumferentially ".
Fig. 1 is the cut-open view of the related disk drive device D of an exemplary embodiment of the present utility model.Fig. 2 is the partial enlarged drawing of the related Spindle Motor of the preferred implementation of the application's utility model 1.In the following description, by Spindle Motor 1 referred to as motor 1.Disk drive device D is small-sized hard disk drive.
Disk drive device D has motor 1, casing 10, at least one dish 12, magnetic head 13 and connector (omitting diagram) etc.Dish 12 is installed on motor 1.Magnetic head 13 is to coiling 12 at least one of carrying out in " reading " and " writing " of information.Actuator (omitting diagram) drives magnetic head 13.Basal part 21 and outer cover part 101 together form a part for casing 10.Casing 10 has motor 1, dish 12 and magnetic head 13 etc. in inside.
As shown in Figure 2, motor 1 is outer-rotor type.In the present embodiment, motor 1 is to have U phase, V phase, W 3 phase motors of 3 phases mutually.Motor 1 has stationary part 2, rotating part 3 and hydrodynamic pressure bearing mechanism (hereinafter referred to as " Bearning mechanism 4 ").Rotating part 3 is supported as rotating with respect to stationary part 2 centered by the central axis J1 of motor 1 by Bearning mechanism 4.
Stationary part 2 has basal part 21, is roughly stator 22 and the distributing board 14 of ring-type.Basal part 21 is the parts that are roughly tabular.Basal part 21 forms a part for casing 10.Basal part 21 has bearing cage 211 and stator maintaining part 212.Bearing cage 211 is roughly tubular.Bearing cage 211 extends to axial upside from basal part 21.Stator maintaining part 212 is extended to axial upside from the upper end of bearing cage 211.
Configure substrate through hole 213 at basal part 21.Substrate through hole 213 connects basal part 21 vertically.The medial surface of bearing cage 211 forms substrate through hole 213.
Stator 22 is configured in the position by radial outside than substrate through hole 213.Stator maintaining part 212 keeps stator 22.Stator 22 has stator core 221 and coil 222.
Stator core 221 has iron core back (omitting diagram) and multiple teeth (omitting diagram).Iron core back is the tubular extending vertically.Stator maintaining part 212 runs through the inside that is inserted into iron core back.The medial surface at the lateral surface of stator maintaining part 212 and iron core back for example fixes by be pressed into, rivet, bonding etc.Thus, stator core 221 is fixed on stator maintaining part 212.
Each tooth extends to radial outside from the lateral surface at iron core back.Tooth has spiral portion (omitting diagram) and terminal part (omitting diagram).At spiral portion coiling wire, thereby form coil 222.Terminal part is expanded to circumferential both sides from the outer edge of spiral portion.
In stator 22, draw multiple extension lines 50 from the coil 222 of each phase (U phase V phase W phase).In this preferred implementation, there are 3 extension lines 50.Each extension line 50 is electrically connected with distributing board 14 respectively.Each extension line 50 and distributing board 14, for example, connect by welding.At the lower surface of basal part 21, the position being connected with distributing board 14 at extension line 50 forms fixed part 24.
As a preferred example of distributing board 14, for example, be flexible printed board (FPCB) or connector etc.Distributing board 14 is configured in the lower surface of basal part 21.Dispose insulcrete 26 at the upper surface of basal part 21.During from end on observation, it is roughly circular that insulcrete 26 is.Insulcrete 26 and stator 22 are axially opposed.Dispose at least one fairlead 51 at basal part 21.Each extension line 50 is directed to the downside of basal part 21 through fairlead 51.Fairlead 51 is for example closed by resin component etc.Thus, can prevent that dust etc. from entering the inside of motor 1 from outside.In addition, a part for distributing board 14 also can not contact with the lower surface of basal part 21.
As shown in Figure 2, rotating part 3 has rotor hub 31 and rotor magnet 321.Rotor hub 31 has dish mounting portion 313, axle 314, the second wheel hub cylindrical portion 320 and the stopper section 33 of hub body portion 311, first wheel cylindrical portion 312, ring-type.
It is roughly discoid that hub body portion 311 is.Hub body portion 311 has wheel hub through hole 315.Wheel hub through hole 315 connects hub body portion 311 vertically.First wheel cylindrical portion 312 is extended downwards from the outer edge of wheel hub body 311.Dish mounting portion 313 is expanded to radial outside from the lateral surface of first wheel cylindrical portion 312.In dish mounting portion 313, be placed with at least one dish (with reference to Fig. 1).
The second wheel hub cylindrical portion 320 is configured between wheel hub through hole 315 and first wheel cylindrical portion 312.The second wheel hub cylindrical portion 320 is extended to axial downside from wheel hub body 311.The lateral surface of the second wheel hub cylindrical portion 320 and stator maintaining part 212 are at diametrically contraposition.
Stopper section 33 is parts of tubular roughly.Stopper section 33 is fixed on the medial surface of the second wheel hub cylindrical portion 320 by be pressed into or bonding etc.
Rotor magnet 321 is the roughly ring-type centered by central axis J1.Rotor magnet 321 is configured in the inner side of first wheel cylindrical portion 312.Dish mounting portion 313 is positioned at the radial outside on the top of rotor magnet 321.Rotor magnet 321 is configured in the radial outside of stator 22.If motor 1 is driven, between rotor magnet 321 and stator 22, produce torque.
Axle 314 is the parts that are roughly bar-shaped.The upper end of axle 314 is inserted in wheel hub through hole 315.The upper end of axle 314, for example, by being pressed into or being bonded and fixed in wheel hub through hole 315.When rotating part 3 rotates, axle 314 also rotates around central axis J1.
Dispose threaded hole 3141 on the top of axle 314.The medial surface that forms threaded hole 3141 extends vertically.Not through shaft 314 vertically of threaded hole 3141.On the top of threaded hole 3141, the internal diameter of threaded hole 3141 is along with increasing gradually towards axial upside.In the time of assembled disc drive unit D, in threaded hole 3141, insert screw (omitting diagram).Clamp device (omitting diagram) is fixed on hub body portion 311 by screw, and clamp device is for shaft collar 12.
As shown in Figure 2, Bearning mechanism 4 is hydrodynamic pressure bearings.Bearning mechanism 4 has lubricating oil (omitting diagram) and bearing 41.In this preferred implementation, bearing 41 is sleeve (being denoted as below sleeve 41).Sleeve 41 is to be roughly parts cylindraceous.Axle 314 runs through the inside that is inserted in sleeve 41.Sleeve 41 has the intercommunicating pore (omitting diagram) that is communicated with along the vertical direction sleeve 41.
At least a portion of sleeve 41 remains on the inside of bearing cage 211.The lateral surface of the medial surface of bearing cage 211 and sleeve 41 is opposed.The medial surface of bearing cage 211 waits the lateral surface that is fixed on sleeve 41 by bonding.When rotating part 3 rotates with respect to stationary part 2, sleeve 41 supports axle 314 for rotating across lubricating oil.Between axle 314 and sleeve 41, there is lubricating oil.
The lower surface of the upper end of sleeve 41 and hub body portion 311 is axially opposed.The lateral surface of sleeve 41 and stopper section 33 are at diametrically contraposition.The end of the radial outside on the top of sleeve 41 and stopper section 33 are axially opposed.Therefore,, in the time that rotating part 3 moves vertically due to the impact being subject to from outside etc., sleeve 41 touches mutually with stopper section 33.Consequently, can prevent that rotating part 3 is from stationary part 2 relative separation.
Cap member 15 is configured in the axial downside of sleeve 41.It is roughly discoideus that cap member 15 is.Cap member 15 is opposed with the bottom of axle 314 and the bottom of sleeve 41 in the axial direction.
Dispose at least one outstanding vertically teat 411 in the outer peripheral edges of the bottom of sleeve 41.Cap member 15 is by making teat 411 be fixed to radially inner side is bending.In other words, cap member 15 is riveted by teat 411.Thus, the bottom of sleeve 41 is closed by cap member 15.In addition, teat 411 both can dispose multiple, also can be along the outer peripheral edges complete cycle configuration of the bottom of sleeve 41.
In addition, cap member 15 also can be fixed on sleeve 41 by be pressed into or bonding etc. except riveted joint.Cap member 15 also can be fixed on basal part 21.
Fig. 3 is the partial enlarged drawing of the motor 1 in the related preferred implementation of the application's utility model.As shown in Figure 3, hub body portion 311 has wheel hub recess 60.Wheel hub recess 60 is expanded to radial outside in the form of a ring from the lateral surface of axle 314.More particularly, wheel hub recess 60 is expanded to radial outside in the form of a ring from the edge of the upper end periphery of axle 314.Wheel hub recess 60 caves in to axial downside at the upper surface of hub body portion 311.
Wheel hub recess 60 has the first spine 61, the second spine 62 and the 3rd spine 63.The first spine 61 is the edges that form the medial surface of the axial upside of wheel hub through hole 315.The first spine 61 is roughly ring-type.The first spine 61 is opposed with the lateral surface of axle 314.The first spine 61 surrounds the lateral surface of axle 314.
The first joint face 65 extends to radial outside from the first spine 61.The first joint face 65 is along circumferentially surrounding the first spine 61.In this preferred implementation, the first joint face 65 is flexure planes.Radial distance between central axis J1 and the first joint face 65 is along with increasing gradually towards axial upside.
The second spine 62 is configured in the radial outside of the first spine 61.The second spine 62 is configured in the end of the radial outside of the first joint face 65.The second spine 62 is roughly ring-type.The height of the second spine 62 is identical with the height of the upper end of axle 314, or higher than the upper end of axle 314.Axial upside is leaned on than the first spine 61 in the position of the second spine 62.The lateral surface, the first spine 61, the first joint face 65 and the second spine 62 that are axle 314 form to the clearance G 1 of axial downside depression.The bottom of clearance G 1 is positioned at the position by axial downside than the upper end of axle 314.
The 3rd spine 63 is configured in the radial outside of the second spine 62.The 3rd spine 63 is roughly ring-type.The 3rd spine 63 surrounds the second spine 62.The position of the 3rd spine 63 is positioned at the position by axial upside than the position of the first spine 61 and the second spine 62.
The second joint face 66 is configured between the second spine 62 and the 3rd spine 63.The second joint face 66 extends to radial outside from the second spine 62.The second joint face 66 is roughly ring-type and surrounds the second spine 62.The second spine 62 is configured in the end of the radially inner side of the second joint face 66.The 3rd spine 63 is configured in the end of the radial outside of the second joint face 66.
The second joint face 66 has the 4th spine 64, the second planar portions 661 and the second rake 662.The 4th spine 64 is configured in the second joint face 66.The 4th spine 64 is roughly ring-type.The 4th spine 64 is along circumferentially surrounding the second spine 62.In the axial direction, the position of the position of the 4th spine 64 and the second spine 62 is roughly the same.Axial upside is leaned on than the first spine 61 in the position of the 4th spine 64.The height of the 4th spine 64 is identical with the height of the upper end of axle 314, or higher than the upper end of axle 314.
The second planar portions 661 is configured between the second spine 62 and the 4th spine 64.From end on observation, the second planar portions 661 is roughly ring-type.The second spine 62 is configured in the end of the radially inner side of the second planar portions 661.The 4th spine 64 is configured in the end of the radial outside of the second planar portions 661.The upper surface almost parallel of the second planar portions 661 and hub body portion 311.The width radially of the second planar portions 661 is larger than the width radially of the first joint face 65.The second planar portions 661 is positioned at the position by axial upside than the first joint face 65.
The second rake 662 is configured between the 3rd spine 63 and the 4th spine 64.From end on observation, the second rake 662 is roughly ring-type.The second rake 662 relatively with central axis J1 inclination.Radial distance between central axis J1 and the second rake 662 is along with increasing gradually towards axial upside.The 3rd spine 63 is configured in the end of the radial outside of the second rake 662.
The axial position of the second rake 662 is roughly the same or higher than the axial position of clearance G 1 with the axial position of clearance G 1.
In addition, the second planar portions 661 needn't be necessarily and the upper surface almost parallel of hub body portion 311.The second planar portions 661 can be also the dip plane or the flexure plane that tilt with respect to central axis J1.The second rake 662 needn't be dip plane.The second rake 662 can be also flexure plane.
After assembling motor 1, in clearance G 1, dispose the bonding agent of the state having solidified.Adhesive A is along the boundary B between the lateral surface of whole circumferential covering the first spine 61 and axle 314.Adhesive A covers at least a portion of the lateral surface of axle 314.In more detail, adhesive A covers the edge of the upper end periphery of axle 314.In other words, bonding agent sealing is formed at boundary B.Adhesive A is leaned on axial downside than the upper end of axle 314.
Thus, can prevent that lubricating oil from spilling to the upper surface of hub body portion 311 from boundary B.
Adhesive A arrives at least a portion of the second spine 62.Adhesive A does not preferably arrive the second planar portions 661 and the second rake 662.Adhesive A more preferably arrives second spine's entirety.Adhesive A further preferably arrives second spine's entirety and along whole circumferential arrival the second spine.Thus, prevented that adhesive A contacts with screw in the time that screw is inserted in threaded hole 3141.
If be coated at least a portion of liquid adhesive A arrival the second spine in clearance G 1, the capillary effect of the adhesive A of locating by the second spine, liquid bonding agent is difficult to flow into the radial outside of the second spine.Therefore, can suppress liquid adhesive A and flow into radial outside from the second spine.
And, if liquid adhesive A is coated in to the region (being equivalent to clearance G 1) by radially inner side than the second spine, remain in this region.Therefore, liquid adhesive A is solidificated in clearance G 1.Curing adhesive A is along the boundary B between lateral surface and first spine 61 of whole circumferential covering axle 314.Therefore, can prevent that lubricating oil from escaping to the upper surface of hub body portion 311 from boundary B.
The width radially of the adhesive A in clearance G 1 is less than axial thickness.Therefore the area that adhesive A contacts with the lateral surface of axle 314 increases.Thus, adhesive A can fixedly secure axle 314 and hub body portion 311.
The width radially of the adhesive A in clearance G 1 is shorter than the width of the second planar portions 661.Therefore,, even if a part for adhesive A is configured in the second planar portions 661, the volume of the adhesive A in clearance G 1 is also large than the volume that is configured in the adhesive A in the second planar portions 661., adhesive A easily remains in clearance G 1 more.Consequently, the area change that adhesive A contacts with lateral surface and the hub body portion 311 of axle 314.Thus, adhesive A can fixedly secure axle 314 and hub body portion 311.
While forming curing adhesive A, first the upper end of axle 314 is inserted in wheel hub through hole 315.As mentioned above, the upper end of axle 314 is by the medial surface that is fixed on wheel hub through hole 315 such as being pressed into.Then, liquid adhesive A is configured in wheel hub recess 60.Adhesive A is along the boundary B between lateral surface and first spine 61 of whole circumferential covering axle 314.Adhesive A also can be used the bonding agent for example hardening by ultraviolet ray.Afterwards, carry out the operations such as ultraviolet ray irradiation or heating through the adhesive A of liquid towards, liquid adhesive A sclerosis.Thus, adhesive A can firmly fix axle 314 and hub body portion 311.In addition, adhesive A also can be applied thermosetting bonding agent, the property bonding agent etc. of being sick of.
Above the related preferred implementation of the utility model is illustrated, but the utility model also can carry out various distortion except above-mentioned.
Fig. 4 is the partial enlarged drawing that the related preferred variant of the application's utility model is shown.As shown in Figure 4, the first joint face 65A is the dip plane tilting with respect to central axis J1.Distance radially between central axis J1 and the first joint face 65A is along with increasing gradually towards axial upside.
Identical with the above, form clearance G 1A by lateral surface, the first spine 61, the second spine 62 and the first joint face 65A of axle 314.The radial width of clearance G 1A is larger than the width of the second planar portions 661A.Adhesive A 1 is configured in clearance G 1A.Identical with the above, adhesive A is also along the boundary B between the lateral surface of whole circumferential covering the first spine 61 and axle 314.
Between the second spine 62 and the 3rd spine 63, configure the 4th 64A of spine.In the axial direction, the position of the position of the 4th 64A of spine and the second spine 62 is roughly the same.Between the second spine 62 and the 4th 64A of spine, dispose the second planar portions 661A.The 4th 64A of spine is positioned at the position roughly the same with the upper end of axle 314 or than the position of the top side in upper end of axle 314.
Between the 3rd spine 63 and the 4th 64A of spine, dispose slot part G2.Slot part G2 caves in to axial downside in hub body portion 311.The second joint face 66A forms the medial surface of slot part G2.Slot part G2 is along circumferentially extending.During from end on observation, slot part G2 is roughly ring-type.Slot part G2 is along circumferentially surrounding the first spine 61 and the second spine 62.
The bottom of slot part G2 is flexure plane.In the axial direction, the position bottom of the bottom of slot part G2 and the position of the bottom of clearance G 1A are roughly the same or be positioned at than the position of the top side of clearance G 1A.The axial position of the axial position of the second planar portions 661A and the upper end of axle 314 is roughly the same.
Width radially between the second spine 62 and the 4th 64A of spine is less than the width radially between the 4th 64A of spine and the 3rd spine 63.Therefore, even when being configured in liquid adhesive A 1 in clearance G 1A and crossing the second planar portions 661A, adhesive A 1 also easily flows to slot part G2 from the second planar portions 661A.And the 3rd spine 63 is configured in the position by axial upside than the first spine 61 and the second spine 62.Therefore,, even if liquid adhesive A 1 moves to slot part G2 from clearance G 1A, adhesive A 1 also easily remains in slot part G2.The interface configurations of the adhesive A 1 of preferred disposition in slot part G2 is in the position by axial downside than the second spine 62.Thus, in assembling when motor 1, can suppressing adhesive A 1 in slot part G2, to be attached to screw first-class.
Fig. 5 is the partial enlarged drawing of the related preferred variant of the application's utility model.As shown in Figure 5, in the axial direction, the position of the position of the second 62B of spine and the first spine 61 is roughly the same.In other words, the first joint face 65B extends in the direction substantially vertical with respect to central axis J1.From end on observation, the first joint face 65B is roughly circular.
Between the second 62B of spine and the 3rd spine 63, dispose slot part G3.Clearance G 3 is along circumferentially extending.From end on observation, clearance G 3 is roughly ring-type.Clearance G 3 caves in to axial downside in hub body portion 311.The second joint face 66B forms the medial surface of slot part G3.The edge of the radial outside of clearance G 3 is the 3rd spines 63.The edge of the radially inner side of clearance G 3 is second 62B of spine.
Diametrically, the width of clearance G 3 is larger than the width of the first joint face 65B.In other words, the width radially between the second 62B of spine and the 3rd spine 63 is larger than the width radially between the first spine 61 and the second 62B of spine.
Adhesive A 2 is configured in lateral surface and the first joint face 65B of axle 314., adhesive A 2 is configured in the upper and boundary B of the lateral surface, the first joint face 65B of axle 314.At least a portion of adhesive A 2 is configured in the second spine.Even when liquid adhesive A 2 is crossed the second 62B of spine, adhesive A 2 also remains in slot part G3.In the axial direction, the position bottom of the bottom of slot part G3 is than the first joint face 65B side on the lower.The interface configurations of the adhesive A 2 in slot part G3 is in the position by axial downside than the first joint face 65B.Therefore, in assembling when motor 1, can suppressing adhesive A 2 in slot part G3, to be attached to screw first-class.
And a part of adhesive A, A1, A2 also can be attached to the upper surface of axle 314.Now, adhesive A, A1, A2 are not preferably configured in threaded hole 3141.
The first joint face 65,65A, 65B can be also the faces beyond flexure plane and dip plane.The first joint face 65,65A, 65B also can have concavo-convex.Thus, the area change that adhesive A, A1, A2 contact with hub body portion 311.Consequently, axle 314 is firmly secured to hub body portion 311.
Between the first spine 61 and the second spine 62,62B, also can configure at least one spine.And, between the second spine 62,62B and the 3rd spine 63, also can configure multiple spines.
As mentioned above, motor 1 is 3 phase motors.But the number of phases of motor 1 needn't be particularly limited, for example, can be also single-phase motor, 2 phases, 5 phases, 7 equal multi-phase motors.
Basal part 21 both can be made up of 1 parts, also can be made up of multiple parts.Basal part 21 for example can be by formation such as cut or punch process.
The utility model for example can be used in the Spindle Motor that disk drive device uses, motor, the fan motor etc. that is equipped on electronic equipment.
Above-described preferred embodiment with and the feature of variation, only otherwise produce contradiction, can suitably combine.
Preferred implementation of the present utility model according to the above description can think, the distortion and the change that do not exceed to those skilled in the art scope and spirit of the present utility model are obvious.Therefore scope of the present utility model is determined by these claims uniquely.
Claims (16)
1. a motor, it has:
Stationary part; And
Rotating part, it can relatively rotate with respect to described stationary part centered by central axis,
Described rotating part has:
Hub body portion, it is in the form of annular discs; And
Axle, it extends vertically,
Described motor is characterised in that,
Described hub body portion has:
Wheel hub through hole, it connects described hub body portion, and described axle is fixed in described wheel hub through hole; And wheel hub recess, its lateral surface from described axle is expanded in the form of a ring to radial outside, and to axial downside depression,
Described wheel hub recess has:
The first spine, it is the edge that forms the medial surface of the axial upside of described wheel hub through hole;
The second spine, it and is configured in the radial outside of described the first spine in the form of a ring;
The 3rd spine, it and is configured in the radial outside of described the second spine in the form of a ring, and is positioned at the position by axial upside than described the first ridge and described the second spine;
Bonding agent, it is along the border between the lateral surface of described the first spine of whole circumferential covering and described axle,
Described bonding agent covers the lateral surface of described axle and arrives at least a portion of described the second spine.
2. motor according to claim 1, is characterized in that,
The width radially of described bonding agent is less than axial thickness.
3. motor according to claim 1, is characterized in that,
Described the 3rd spine is configured in the position by axial upside than described the second spine.
4. motor according to claim 1, is characterized in that,
Described bonding agent covers the edge of the upper end periphery of described axle.
5. motor according to claim 1, is characterized in that,
The height of described the second spine is identical with the height of the upper end of described axle, or higher than the upper end of described axle.
6. motor according to claim 1, is characterized in that,
Described wheel hub recess has the first joint face that extends and surround described the first spine from described the first spine to radial outside.
7. motor according to claim 6, is characterized in that,
In the axial direction, the position of described the first joint face is identical or lower than the position of described the second spine with the position of described the second spine.
8. motor according to claim 1, is characterized in that,
Described wheel hub recess has to the ring-type slot part of axial downside depression between described the second spine and described the 3rd spine.
9. motor according to claim 8, is characterized in that,
Described wheel hub recess has the 4th spine of the ring-type being configured in described ring-type slot part.
10. motor according to claim 9, is characterized in that,
In the axial direction, the position of described the second spine is identical with the position of described the 4th spine.
11. motors according to claim 8, is characterized in that,
The bottom of described ring-type slot part is positioned at the position by axial downside than described the second spine.
12. motors according to claim 1, is characterized in that,
In the axial direction, the position of described the first spine is identical with the position of described the second spine.
13. motors according to claim 1, is characterized in that,
In the axial direction, the position configuration of described the first spine is than the position of side on the lower, the upper end of described axle.
14. motors according to claim 1, is characterized in that,
In the axial direction, the position configuration of described the 3rd spine is in the position of the top side in upper end than described axle.
15. motors according to claim 1, is characterized in that,
By the upper end of described axle is inserted in described wheel hub through hole, and make border between the lateral surface of described the first spine and described axle by bonding agent along whole circumferential covering, and form bonding closure.
16. 1 kinds of disk drive devices, is characterized in that,
It has:
Motor claimed in claim 1;
Dish, it rotates by described motor;
Magnetic head, its carry out reading of described dish and write at least one;
Actuator, it drives described magnetic head; And
Casing, wherein built-in described motor, described dish, described magnetic head and described actuator.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361806473P | 2013-03-29 | 2013-03-29 | |
| US61/806,473 | 2013-03-29 | ||
| US14/173,070 US8824096B1 (en) | 2013-03-29 | 2014-02-05 | Motor including rotor hub with recessed portion and disk drive apparatus including the same |
| US14/173,070 | 2014-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760079U true CN203760079U (en) | 2014-08-06 |
Family
ID=51255325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420085064.1U Expired - Fee Related CN203760079U (en) | 2013-03-29 | 2014-02-27 | Motor and disc drive device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203760079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078065A (en) * | 2013-03-29 | 2014-10-01 | 日本电产株式会社 | Motor and disk drive apparatus |
-
2014
- 2014-02-27 CN CN201420085064.1U patent/CN203760079U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078065A (en) * | 2013-03-29 | 2014-10-01 | 日本电产株式会社 | Motor and disk drive apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 |