CN202790144U - Pivot bearing device and magnetic recording device using same - Google Patents
Pivot bearing device and magnetic recording device using same Download PDFInfo
- Publication number
- CN202790144U CN202790144U CN2012203706253U CN201220370625U CN202790144U CN 202790144 U CN202790144 U CN 202790144U CN 2012203706253 U CN2012203706253 U CN 2012203706253U CN 201220370625 U CN201220370625 U CN 201220370625U CN 202790144 U CN202790144 U CN 202790144U
- Authority
- CN
- China
- Prior art keywords
- bearing
- ball
- outer ring
- ring
- trunnion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/0829—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial loading of both hub and shaft by an intermediate ring or sleeve
- F16D1/0835—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial loading of both hub and shaft by an intermediate ring or sleeve due to the elasticity of the ring or sleeve
Abstract
The utility model relates to a pivot bearing device and a magnetic recording device using the same. The pivot bearing device (13) comprises a shaft (21) and a plurality of ball bearings (20), wherein the ball bearings are configured in the axial direction; inner rings (27) of the ball bearings are fixed on the shaft (21); outer rings (25) are fixed in a fixed hole (18) of an access arm (16) by virtue of a bearing location ring (12) and swing around the shaft; and the number of balls of the ball bearings (20) and the number of teeth, which are used for pressing the outer rings (25), of the bearing location ring (12), are the same.
Description
Technical field
The utility model relates to a kind of low moment of torsion, the lower trunnion bearing device of high-precision swing and the magnetic recording system that uses this device also can realized of low moment of torsion change.
Background technique
In the past, this trunnion bearing device be with a plurality of ball bearings with respect to vertically (tandem) configuration of the axle corresponding with its inner ring, thereby can realize that the low moment of torsion of highi degree of accuracy centered by axle swings.On the other hand, in magnetic recording system, particularly hard disk unit (being designated hereinafter simply as HDD), the trunnion bearing device is used as the bearing of rocking arm (swing) type head access (access) mechanism more.Along with improving constantly of the single face recording density among the HDD, by the raising of line memory density and track density, the single face recording density will reach 1Tbpsi(1 Tera Bit Per Square Inch).Therefore, the required precision of small location is also being improved, day by day requiring the precision of trunnion bearing to improve.
In patent documentation 1, by consisting of for one group inner ring of two groups of bearings that consist of trunnion bearing the axle of pivot, can cut down the number of member, and can suppress the moment of torsion change.In addition, its head arm and trunnion bearing that also discloses HDD fixes by bearing locating ring (TOLERANCE RING).And disclose in the gap of hole by bearing locating ring being disposed at head arm and trunnion bearing, utilize compression to produce reaction force, can be with the hole of trunnion bearing yielding support in head arm.In addition, in patent documentation 2, disclose when utilizing bearing locating ring trunnion bearing to be fixed in the hole of head arm, plastic deformation occurs in the protruding part of bearing locating ring (Projection), reducing effect is in the stress of trunnion bearing outer ring thus, the impact that reduction produces along with race deformation, and the raising of acquisition withdrawal force.And, also disclose and can improve permissible range with respect to the error in the gap between the external diameter of the hole of head arm and trunnion bearing, can prevent from rising at the moment of torsion that is equipped with under the state of trunnion bearing.
Patent documentation
Patent documentation 1: TOHKEMY 2002-106554 communique (the 4th page [0024]～[0026] section, Fig. 5, Fig. 7)
Patent documentation 2:US2008/0199254 number open communique (the 1st page [0012]～[0014] section, Fig. 2, Fig. 9)
The model utility content
The problem that model utility will solve
Yet, in patent documentation 1 disclosed trunnion bearing, need to form the rolling groove that rolls for ball in the part of axle, consider from the angle of bearing performance, because material selection aspect lacks degrees of freedom, process differently from the technique of common ball bearing, thereby cause the reduction of productivity and the rising of price.
On the other hand, realize in the assembling to trunnion bearing at the disclosed bearing locating ring that utilizes of patent documentation 2, for being connected firmly of the hole that makes head arm and trunnion bearing, need between the outer ring of bearing locating ring and trunnion bearing, apply higher surface pressure.Thus, so that the distortion of the outer ring of trunnion bearing increases, the rolling groove of ball deforms, and causes the reduction of running accuracy.Thus, will cause the reduction of the precision of the access speed of the record reproducing devices such as HDD or stop position, thereby become the main cause that the performance of record reproducing device reduces.
The utility model is exactly be used to the problem that solves above-mentioned prior art, can be simple with low-cost implementation structure, precision is high, reliability is high trunnion bearing device, the high density magnetic recording device of high reliability is provided thus.
Solve the means of problem
The utility model to achieve these goals, a kind of trunnion bearing device is provided, it has axle and a plurality of ball bearing, above-mentioned a plurality of ball bearing is with respect to the vertically side by side configuration of this axle, and its inner ring is fixed in above-mentioned axle, by bearing locating ring, the outer ring of above-mentioned ball bearing is fixed in the fixed hole of head arm, and around above-mentioned axle swing, it is characterized in that the ball number of above-mentioned ball bearing is identical with the number of teeth of pressing above-mentioned outer ring of above-mentioned bearing locating ring.According to this structure, when the outer ring is made of simple annular, will be out of shape because of the stress of bearing locating ring, therefore, be deformed into the same number of polygonal with the number of teeth of bearing locating ring.Ball bearing is applied precompression, and the inner ring raceway face contacts with ball with the outer ring raceway face, and the utilization of inner ring inside diameter is inserted fixing axle and improved its rigidity.That is, in the outer ring, with respect to the having ball and do not have the position of ball of circumferencial direction, have a great difference with respect to the rigidity of its radial direction.Shown in the utility model, when the number of the number of teeth that makes bearing locating ring and ball is identical, can make the position of tooth of the distortion of outer ring and bearing locating ring and the location independent of ball, and become the periodic function that the spacing according to bearing locating ring or ball repeats with same shape.Therefore, even the outer ring deforms, its geometrical center is not moved yet.Therefore, can guarantee position relationship under the state that the outer ring do not deform in fact.Like this, because the outer ring does not deform in fact, therefore can improve the performance of trunnion bearing device.
In addition, of the present utility model being characterised in that, the along the circumferential direction uniformly-spaced configuration of tooth that is used for pressing above-mentioned outer ring of above-mentioned bearing locating ring.According to this structure, as mentioned above, the polygonal the when outer ring is deformed becomes regular polygon, can reduce thus the deviation of distortion, improves the performance of trunnion bearing device.
In addition, of the present utility model being characterised in that, the material of the inner ring of above-mentioned ball bearing, outer ring, ball is Martensitic Stain Less Steel.According to this structure, to compare with the high-carbon chromium steel such as SUJ2, antirust ability is strong, therefore, can realize need not to apply rust preventive oil, reduces the pollution that causes along with the volatilization of rust preventive oil.
In addition, of the present utility model being characterised in that, the hunting range of above-mentioned trunnion bearing device is that the ball number of above-mentioned ball bearing is more than 8 below 45 degree in mechanical angle.In order to reduce each parts with respect to the skew of the sense of rotation configuration of ball bearing, the ball spacing of ball bearing can be configured to below the mechanical angle.Ball spacing by making trunnion bearing namely, is ball bearing more than 8 by adopting ball number below 45 degree, can be so that in the hunting range, the mutual configuration of ball on circumference is constant, thereby can realize more stable precision.
In addition, the utility model also provides a kind of magnetic recording system, its use has axle and configuration and inner ring are fixed in the trunnion bearing device of a plurality of ball bearings of above-mentioned axle side by side vertically with respect to this axle, by bearing locating ring, the fixed hole that the top is equipped with the head arm of magnetic head is fixed in the outer ring of above-mentioned ball bearing, come tracking to move by the swing round axle, it is characterized in that the ball number of above-mentioned ball bearing is identical with the number for the number of teeth of pressing above-mentioned outer ring of above-mentioned bearing locating ring.According to such structure, with respect to the head access in the magnetic recording system, can guarantee the running accuracy of higher trunnion bearing device, can improve the track location precision of the high-density recording recording device that track density increases, realize being conducive to the magnetic recording system of high density recording.
The effect of model utility
As mentioned above, the utility model is in utilizing the bearing locating ring oscillating-type trunnion bearing device that the outer ring is fixing, ball number by making ball bearing is identical with the number of the number of teeth of bearing locating ring, even can realize race deformation, geometrical center can not be moved yet, can guarantee under the state that the outer ring do not deform in fact position relationship can be with the trunnion bearing device of high-precision swing.And, by adopting this trunnion bearing device, can realize carrying out with high track density the magnetic recording system of high density recording.
Description of drawings
Fig. 1 is the HDD schematic top plan view of a mode of execution of the utility model.
Fig. 2 is the plan view of HSA of the HDD of present embodiment.
Fig. 3 is the trunnion bearing device of present embodiment and the schematic perspective view of head arm.
Fig. 4 is the trunnion bearing device of present embodiment and the cross-sectional schematic of bearing locating ring.
Fig. 5 (a) is the plan view of bearing locating ring, (b) is its sectional view.
Fig. 6 is the stereogram of another bearing locating ring
Fig. 7 (a) to (d) is the schematic top plan view of relation of the tooth of the ball of the trunnion bearing device under each phase place and bearing locating ring.
Symbol description
1?HDD
2 frames
3 pallets
4 spindle drive motors
5 lamps
12 bearing locating rings
The 12a protuberance
The 12b tooth
13 trunnion bearing devices
16 head arms
18 fixed holes
20 ball bearings
21 axles
25 outer rings
26 balls
27 inner rings
Embodiment
With reference to a description of drawings mode of execution of the present utility model.Fig. 1 is the schematic top plan view of the HDD of a mode of execution of the utility model, Fig. 2 is the plan view of HSA of the HDD of present embodiment, Fig. 3 is the trunnion bearing device of present embodiment and the schematic perspective view of head arm, Fig. 4 is the trunnion bearing device of present embodiment and the cross-sectional schematic of bearing locating ring, Fig. 5 (a) is the plan view of bearing locating ring, Fig. 5 (b) is its sectional view, Fig. 6 is the stereogram of another bearing locating ring, and Fig. 7 is the schematic top plan view of relation of the tooth of the ball of the trunnion bearing device under each phase place and bearing locating ring.
The summary of the HDD of present embodiment is that the surface recording density under the perpendicular magnetic recording of 2.5 types (inch) is about 750Gbpsi(Giga bit per square inch), carry 2 Disk, have 1TB(Tera Byte) storage capacity.At this, at first with Fig. 1 and Fig. 2 the structure of HDD is described.
Fix and be supported on the frame 2 of aluminum by the not shown main shaft of being located at spindle drive motor 4 and Line concentrator in the mode that can rotate freely as the disk 3 of magnetic recording media.On disk 3, on glass matrix (Substrate), by spatter film forming, form substrate, soft magnetism lining bottom (SUL), Ru mesosphere, recording layer, DLC layer etc.And surperficial at an upper portion thereof, apply to be that the PFPE (PFPE) of oil is as the oiling agent of primary coil as fluorine.As recording layer, adopt particle (granular) film of Co-Cr-Pt, crystal boundary is by SiO
2Separate.
HSA(Head Stack Assembly) 10 be provided with magnetic head 11 at the one end, the other end is provided with the mobile VCM(Voice Coil Motor of track direction (radial direction of disk 3) that is configured for along disk 3) coil 7.In magnetic head 11 sides of HSA10, utilize die forging will be called as HGA(Head Gimbal Assembly: magnetic head 11 magnetic head fold piece combination) is fixing with respect to head arm 16 with the universal joint (gimbal) of controlling this magnetic head-spring assembling body.At the more front end of magnetic head 11, at the position that is called as fin 15, the magnetic head 11 and lamp 5 interlocks of frame 2 is installed, disk 3 is carried out load/unload (Load/Unload).Magnetic head 11 is equipped on the Femto Slider (Femto Slider), by the suspension support of high rigidity and adopt the form of utilizing thermal expansion to carry out the control of bearing shell shelling amount.
HSA10 constitutes take the trunnion bearing device 13 of centre located therein section as rotating center and swings.Downside at the coil 7 of VCM, dispose magnet 8, consist of magnetic circuit by not shown yoke, utilization supplies to the electric current of coil 7, based on not coming bright Left Hand Rule (Fleming's left hand rule) to produce thrust, can swing take trunnion bearing device 13 as rotating center, realize that tracking moves.
As shown in Figure 3, in HSA10, trunnion bearing device 13 is also referred to as E-block by the head arm 16(that is made by aluminum alloy that bearing locating ring 12 is fixed in as the base station of HSA10) fixed hole 18, when utilizing bearing locating ring 12 fixedly, when magnetic head 11 because of ESD(Electro Static Discharge: static discharge) etc. in the situation about breaking down, be suitable for HSA10 from HDA(Head Disk Assembly: cephali disc assembly) unload, with change, the repair such as adjustment.
In recent years, along with the development of HDD densification, the high performance of magnetic head 11 is development thereupon also, yet the structure that exists for the film of realizing higher MR ratio is tending towards complicated, the trend that anti-ESD ability reduces.In addition, because the unit price of component also rises thereupon, therefore, the operability of the repair of expectation HGA is better, and for this reason, fixing and the bonding of prior art that expectation utilizes bearing locating ring 12 can improve operating efficiency with being pressed into etc. to compare.
As shown in Figure 3, Figure 4, trunnion bearing device 13 have axle 21 and by separator 30 with respect to axle 21 arranged side by side a plurality of (in the present embodiment for a pair of) ball bearing 20 of configuration vertically.On axle 21, be provided with for the bolt 22 that trunnion bearing device 13 is fixed in frame 2.Ball bearing 20 is with grease lubrication, its have the inner ring 27 that is fixed on the axle 21, by bearing locating ring 12 be fixed in the fixed hole 18 of head arm 16 outer ring 25, be configured in a plurality of balls 26 between inner ring 27 and the outer ring 25, be used for keeping retainer 28 and the sealing component 29 of ball 26.
Need to prove that in the present embodiment, inner ring 27, outer ring 25, ball 26 are made by Martensitic Stain Less Steel respectively.Thus, compare when using the high-carbon chromium steel such as SUJ2, antirust ability is high, therefore can need not to apply rust preventive oil, reduces the pollution that the volatilization with rust preventive oil causes.
In addition, as shown in Figure 5, bearing locating ring 12 is that the steel plate that will be made of the SUS304CSP elastomeric material is rolled into tubular and forms, at axial intermediate portion, to the outstanding along the circumferential direction uniformly-spaced configuration of a plurality of protuberance 12a of radial outside.Therefore, between a plurality of protuberance 12a, press the along the circumferential direction uniformly-spaced configuration of a plurality of tooth 12b of outer ring 25.
Need to prove that as shown in Figure 6, bearing locating ring 12 also can adopt protuberance 12a to cut apart vertically, each the tooth 12b between the protuberance 12a of cutting apart presses the structure of the outer ring 25 of each ball bearing 20.
In addition, in the present embodiment, press the tooth of outer ring 25 as being used between the adjacent protuberance 12a, be used to form the surface of contact with outer ring 25 butts, bearing locating ring 12 applies pressing force from the protuberance 12a of both sides to this surface of contact so that each protuberance 12a deforms between trunnion bearing device 13 and head arm 16.Therefore, in the present embodiment, the number of teeth (surface of contact quantity) equates in fact with the number of protuberance 12a.
Therefore, in the present embodiment, the ball number of ball bearing 20 and the number of teeth of pressing outer ring 25 of bearing locating ring 12 are set as similar number.When outer ring 25 was simple ring, outer ring 25 can deform under the effect of stress of bearing locating ring 12, therefore, was deformed into the polygonal with the number of teeth similar number of bearing locating ring 12.Ball bearing 20 is applied in precompression, and inner ring raceway face and outer ring raceway face contact with ball 26, and the inner ring inside diameter has improved its rigidity by being inserted into fixing axle 21.The circularity deterioration of outer ring 25 and the number of teeth of bearing locating ring and ball number and position relationship thereof have substantial connection.Therefore, as shown in Figure 7, when the tooth 12b position at bearing locating ring 12 is provided with ball 26 (phase difference, 0 °), the tooth 12b, outer ring 25, ball 26, inner ring 27, the axle 21 that then are bearing locating ring 12 almost are configured in the relation on the same radius.Therefore, in appearance, it is maximum that the rigidity of outer ring becomes.On the other hand, be positioned at when the position of the tooth 12b of bearing locating ring 12 in the situation of ball 26 and the centre of ball 26 (180 ° of phase differences), the rigidity of outer ring 25 becomes minimum on the contrary.At this, when so that the quantity of the number of teeth of bearing locating ring 12 and ball number when identical, the distortion of outer ring 25 can with the state of the location independent of the position of the tooth 12b of bearing locating ring 12 and ball 26 under, become the periodic function according to the shape repeated deformation identical with the spacing of bearing locating ring 12 or ball 26.Therefore, even outer ring 25 deforms, its geometrical center can not be moved yet.Therefore, can guarantee position relationship under the state that outer ring 25 do not deform in fact.The distortion that like this, just can realize outer ring 25 does not have in fact influential highi degree of accuracy trunnion bearing device.
Particularly because therefore in a circumferential direction uniformly-spaced configuration of the tooth 12b of bearing locating ring 12, can make the polygonal after outer ring 25 deforms become regular polygon, can reduce the deviation of distortion, further suppress reliably the movement of geometrical center.
In addition, in recent years, because the raising of recording density, writing fashionablely to disk, utilizing stacked tile type magnetic recording (the SMR:Shingled Write Magnetic Recording) technology that under the state of a side that makes magnetic track and formerly magnetic track stack, records.In this technology, track pitch is very trickle, requires the correct location of magnetic head 11, and therefore, the geometrical center of trunnion bearing device 13 is motionless will to be very large advantage.
Need to prove that as long as satisfy above-mentioned relation, the ball number of ball bearing 20 can be set as arbitrary value, but as the ball number that is applied to the ball bearing 20 of HDD,, for example, adopt the design more than 8, below 13.Therefore, the number of teeth of bearing locating ring 12 also adopts the design more than 8, below 13.
In addition, in the present embodiment, the hunting range of trunnion bearing device 13 is below 45 degree in mechanical angle, in order to reduce each parts with respect to the skew of the configuration of the sense of rotation of ball bearing 20, the ball of ball bearing 20 is configured to below the mechanical angle apart from (ball pitch).That is, be ball bearing more than eight by using ball number, in hunting range, do not change the mutual configuration on the circumference of ball 26, thereby can realize more stable precision, thereby can improve the reliability of magnetic recording system.
Need to prove that the utility model is not limited to above-mentioned mode of execution, can suitably be out of shape, improvement etc.
For example, in the present embodiment, bearing locating ring 12 adopts outer ring 25 structures of directly pressing each ball bearing, but the pressing force that needs only at bearing locating ring 12 can act under the degree of outer ring 25, when adopting thin-wall bearing shell, the utility model also can be applicable to the type that bearing shell is fixed in outer ring 25.
In addition, in the present embodiment, from easy assembling angle, the projection 12a of bearing locating ring 12 is outstanding to radial outside, but also can make it outstanding to radially inner side, with the top of each protuberance tooth 12b as bearing locating ring 12.
Claims (5)
1. a trunnion bearing device is characterized in that,
Have axle and a plurality of ball bearing, described a plurality of ball bearings are with respect to the vertically side by side configuration of described axle, and the inner ring of described ball bearing is fixed in described axle, by bearing locating ring, the fixed hole of head arm is fixed in the outer ring of described ball bearing, and centers on described axle swing
The ball number of described ball bearing is identical with the number of teeth for pressing described outer ring of described bearing locating ring.
2. trunnion bearing device according to claim 1 is characterized in that,
The along the circumferential direction uniformly-spaced configuration of tooth that is used for pressing described outer ring of described bearing locating ring.
3. trunnion bearing device according to claim 1 and 2 is characterized in that,
The material of the described inner ring of described ball bearing, described outer ring, described ball is Martensitic Stain Less Steel.
4. trunnion bearing device according to claim 1 and 2 is characterized in that,
The hunting range of described trunnion bearing device is that the ball number of described ball bearing is more than 8 below 45 degree in mechanical angle.
5. magnetic recording system, it is characterized in that, one of described magnetic recording system right to use requirement 1～4 described trunnion bearing device, by bearing locating ring, the fixed hole that the top is equipped with the head arm of magnetic head is fixed in the outer ring of described ball bearing, and described magnetic head is by round the swing of axle and tracking moves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012078228A JP5849825B2 (en) | 2012-03-29 | 2012-03-29 | Pivot bearing device for swing arm of magnetic storage device and magnetic recording device using the same |
| JP2012-078228 | 2012-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790144U true CN202790144U (en) | 2013-03-13 |
Family
ID=47817410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203706253U Expired - Lifetime CN202790144U (en) | 2012-03-29 | 2012-07-27 | Pivot bearing device and magnetic recording device using same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5849825B2 (en) |
| CN (1) | CN202790144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339691A (en) * | 2013-06-27 | 2016-02-17 | 圣戈班性能塑料万科有限公司 | Tolerance ring with divided torque slip |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1182488A (en) * | 1996-10-25 | 1999-03-26 | Nippon Seiko Kk | Roll bearing and spindle device |
| JP2001041247A (en) * | 1999-07-28 | 2001-02-13 | Nsk Ltd | Rolling bearing |
| JP2001327120A (en) * | 2000-05-15 | 2001-11-22 | Matsushita Electric Ind Co Ltd | Disk driving device |
| JP3536022B2 (en) * | 2000-10-04 | 2004-06-07 | ミネベア株式会社 | Pivot bearing device |
| JP2004068860A (en) * | 2002-08-02 | 2004-03-04 | Nsk Ltd | Rolling bearing device |
| JP2007305268A (en) * | 2006-05-15 | 2007-11-22 | Nsk Ltd | Bearing unit |
-
2012
- 2012-03-29 JP JP2012078228A patent/JP5849825B2/en active Active
- 2012-07-27 CN CN2012203706253U patent/CN202790144U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339691A (en) * | 2013-06-27 | 2016-02-17 | 圣戈班性能塑料万科有限公司 | Tolerance ring with divided torque slip |
| CN105339691B (en) * | 2013-06-27 | 2018-09-07 | 圣戈班性能塑料万科有限公司 | The tolerance ring of torque sliding with segmentation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5849825B2 (en) | 2016-02-03 |
| JP2013204812A (en) | 2013-10-07 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |