CN102904399A - Rotary device, manufacturing method thereof and assembling apparatus thereof - Google Patents
Rotary device, manufacturing method thereof and assembling apparatus thereof Download PDFInfo
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- CN102904399A CN102904399A CN2012102744002A CN201210274400A CN102904399A CN 102904399 A CN102904399 A CN 102904399A CN 2012102744002 A CN2012102744002 A CN 2012102744002A CN 201210274400 A CN201210274400 A CN 201210274400A CN 102904399 A CN102904399 A CN 102904399A
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Abstract
The invention discloses a manufacturing method of a rotary device (1). The rotary device (1) comprises a rotor (6) for carrying recording discs (8); a base (4) having a bearing hole using a rotating shaft of the rotor (6) as a center and an annular wall portion (4e) using the bearing hole as a center; a bearing unit (12) which rotatably supports the rotor with respect to the base (4)and adhesively fixed in the bearing hole (4h); a core body (40) having an annular portion (40a) and a convex pole (40b) fixed on the annular wall portion (4e); and a coil (42) wound around the convex pole (40b). The manufacturing method comprises steps of: fitting the bearing unit (12) and the bearing hole (4h) of the base (4), spreading curable resin (54) all around peripheries of the edges of the bearing unit (12) and the bearing hole (4h), respectively irradiating ultraviolet beams to a plurality of ultraviolet light irradiation regions located at different positions along a circumferential direction of existing areas with the curable resin (54).
Description
Technical field
The present invention relates to slewing and manufacture method and the apparatus for assembling such as a kind of hard disc drive unit.
Background technology
The slewings such as hard disc drive unit have the demand of slimming.For example in patent documentation 1, putting down in writing bearing unit chimeric to the dead eye of pedestal and the slewing that bond and fix.In order to make above-mentioned slewing thinner, there is the method that bearing unit is shortened with respect to the chimeric distance of pedestal.
[background technology document]
[patent documentation]
[patent documentation 1] Japanese Patent Laid-Open 2011-8851 communique
Yet if bearing unit is shortened with respect to the chimeric distance of pedestal, the bearing unit that is installed on the pedestal easily produces inclination with respect to pedestal.If the installation shaft bearing unit then is positioned in the gradient change of the epitrochanterian record video disc that is supported by bearing unit greatly obliquely.If the gradient of record video disc is larger, then the read-write error of data increases.
In the manufacture method of the slewing that patent documentation 1 is put down in writing, to exposing to the hardening resin irradiation ultraviolet radiation of the end face of dead eye and bearing unit and make its sclerosis.Yet the method is to the hardening resin that exposes irradiation ultraviolet radiation in the broader context, therefore, can produce the inadequate situation of this hardening of resin.If keep the inadequate state of sclerosis, then when in the operation of making slewing rotor being applied inclined to one side load, the possibility of the bearing unit inclination of support rotor uprises.If make the time of irradiation ultraviolet radiation elongated in order to promote to harden, then the activity duration elongated, thereby operating efficiency reduces.
Summary of the invention
Under above-mentioned background, the inclination of the bearing unit on the pedestal that problem is to provide a kind of inhibition to be installed in slewing is provided, even and if slimming also can alleviate the slewing of reduction of the installation accuracy of bearing unit.
[inventing problem to be solved]
The present invention In view of the foregoing finishes, and its purpose is to provide a kind of slewing that reduces the read-write error of data.
[technological means of dealing with problems]
In order to solve above-mentioned problem, in the manufacture method of the slewing of the first technical scheme of the present invention, this slewing comprises: rotor, for mounting record video disc; Pedestal has dead eye and annular wall section centered by above-mentioned dead eye centered by the rotating shaft of above-mentioned rotor; Bearing unit freely supports above-mentioned rotor with respect to the said base rotation, and is bonded and fixed in the above-mentioned dead eye; Core body has the annulus section that is fixed on above-mentioned annular wall section and from above-mentioned annulus section towards the outstanding salient pole of radial direction; And coil, coiling metal wire on above-mentioned salient pole and forming.And, the principal character of the manufacture method of this slewing is may further comprise the steps: make the above-mentioned dead eye of above-mentioned bearing unit and said base chimeric, and make hardening resin spread all over the periphery at edge of the above-mentioned dead eye of the lower surface of above-mentioned bearing unit and said base; And in the domain of the existence that above-mentioned hardening resin exists, the Zhou Fangxiang along this domain of the existence is positioned at a plurality of ultraviolet radiation zones territory difference irradiation ultraviolet radiation light beam of diverse location.
In addition, the slewing of the second technical scheme of the present invention comprises: rotor, for mounting record video disc; Pedestal, the dead eye centered by the rotating shaft of above-mentioned rotor and the annular wall section centered by above-mentioned dead eye; Bearing unit freely supports above-mentioned rotor with respect to the said base rotation, and is bonded and fixed in the above-mentioned dead eye; Core body has the annulus section that is fixed on above-mentioned annular wall section and from above-mentioned annulus section towards the outstanding salient pole of radial direction; And coil, coiling metal wire on above-mentioned salient pole and forming.And, the principal character of this slewing is: above-mentioned bearing unit is entrenched in the above-mentioned dead eye of said base, spread all over the lower surface of above-mentioned bearing unit and said base above-mentioned dead eye the edge and have hardening resin, and in above-mentioned hardening resin, along the edge illumination ultraviolet beam of the above-mentioned end face of above-mentioned bearing unit and the zone of hardening is the diverse location that UV cured section is configured in Zhou Fangxiang, and be formed at least three positions.
In addition, in the manufacture method of the slewing of the 3rd technical scheme of the present invention, this slewing comprises: rotor, for mounting record video disc; Pedestal has the dead eye centered by the rotating shaft of above-mentioned rotor; And bearing unit, freely support above-mentioned rotor with respect to the said base rotation, and be bonded and fixed in the above-mentioned dead eye.This manufacture method is characterised in that and may further comprise the steps: make the above-mentioned dead eye of above-mentioned bearing unit and said base chimeric, and make hardening resin spread all over the periphery at edge of the above-mentioned dead eye of the lower surface of above-mentioned bearing unit and said base; And with the centre in ultraviolet radiation zone territory in the mode irradiation ultraviolet radiation light beam midway of the domain of the existence of above-mentioned hardening resin.
In addition, the apparatus for assembling of the 4th technical scheme of the present invention is the apparatus for assembling of assembling the slewing of the second technical scheme of the present invention, it is characterized in that comprising: the core body press section, to the pressurization of the annulus section of above-mentioned core body and the annulus section of above-mentioned core body is combined with the annular wall section of said base; When coil press section, present dynasty's said base press down above-mentioned core body press section first surface above-mentioned coil and above-mentioned rotor subtend is pressurizeed; And limiting mechanism, be configured between above-mentioned core body press section and the above-mentioned coil press section, the plus-pressure that the first surface of above-mentioned coil is applied in order to limit above-mentioned coil press section, and this plus-pressure is limited in the scope of 3～10N.
In addition, with combination in any, the inscape of the present invention of above inscape or be expressed in phase double replacement between method, product, the manufacture method etc. and the person also can be effective as kenel of the present invention.
[effect of invention]
According to the present invention, owing to can suppress to be installed in the inclination of the bearing unit on the pedestal of slewing, so even if can provide a kind of carry out slimming also can alleviate bearing unit installation accuracy reduction so that can reduce the slewing of the read-write error of data.
Description of drawings
Fig. 1 is the stereogram of the slewing of expression embodiments of the present invention.
Fig. 2 is the A-A line profile of the slewing of Fig. 1.
Fig. 3 is that expression is to the major part amplification stereogram of the step of the bearing unit of Fig. 2 and pedestal irradiation ultraviolet radiation light beam.
Fig. 4 A be expression to the major part amplification view of the step of the bearing unit of Fig. 2 and pedestal irradiation ultraviolet radiation light beam, Fig. 4 B is the B-R-B line profile of Fig. 4 A.
Fig. 5 is that expression is to the major part amplification stereogram of the step of the comparative example of the bearing unit of Fig. 2 and pedestal irradiation ultraviolet radiation light beam.
Fig. 6 A be expression to the major part amplification view of the step of the comparative example of the bearing unit of Fig. 2 and pedestal irradiation ultraviolet radiation light beam, Fig. 6 B is the C-C line profile of Fig. 6 A.
Fig. 7 A～7C is the major part amplification profile that the core body of coil that expression will have Fig. 2 is fixed on the step on the pedestal.
Fig. 8 is the curve chart of the inclination of the expression rotor that utilizes the slewing that the manufacture method of embodiments of the present invention makes.
[explanation of symbol]
Embodiment
Below, the present invention will be described based on better execution mode and with reference to graphic.Same or equal inscape shown in graphic to each, member mark prosign, and suitably the repetitive description thereof will be omitted.In addition, for easy understanding, the size of the member during each is graphic is suitably amplified, is dwindled to represent.In addition, be omitted in each is graphic that the part of unessential member represents aspect the explanation execution mode.
The slewing of execution mode can preferably be used as the video disc drive unit, especially carry the magnetically hard disc driver of the record video disc of record data.
Fig. 1 is the stereogram of expression slewing 100.In Fig. 1, for the formation of the inboard that represents slewing 100, and the state except top cover (not shown) is unloaded in expression.Slewing 100 comprises pedestal 4, rotor 6, record video disc 8 and data read/write section 10.
Below, with respect to pedestal 4, a side of carrying rotor 6 is made as upside describes.
Data read/write section 10 comprises landmark (record-reproduce head) (not shown), swing arm 14, voice coil motor 16 and pivot 18.Landmark is installed in the leading section of swing arm 14, with data be recorded in the record video disc 8 in, and from the record video disc 8 reading out data.Pivot 18 swings around magnetic head rotating shaft S with respect to pedestal 4 and freely supports swing arm 14.Voice coil motor 16 makes swing arm 14 swing around magnetic head rotating shaft S, and makes landmark move to desired location on the upper surface of record video disc 8.Voice coil motor 16 and pivot 18 be utilize control head the position known technology and consist of.
Fig. 2 is the A-A line profile of Fig. 1.Slewing 100 also comprises core body 40 and coil 42.Core body 40 comprise the 40a of annulus section and from the 40a of this annulus section towards radial direction for example 12 salient pole 40b of the direction of rotating shaft R quadrature (namely with) lateral expansion, and be fixed on the upper surface side of pedestal 4.Core body 40 for example is 4 thin electromagnetic steel plates of lamination and is integrally formed by holding back to close.The surface of core body 40 implemented the insulation coating that utilizes electro dipping or powder body coating etc. to carry out.Has coil 42 at each salient pole 40b.Coil 42 is such as being the metal wire that the surface at copper cash has an insulating barrier of amido Ethyl formate resin etc. is reeled and to form.By 3 mutually roughly sinuous drive current flow through this coil 42 and produce along salient pole 40b and drive magnetic flux.The circular annular wall section 4e of upper surface setting centered by the rotating shaft R of rotor 6 at pedestal 4.Core body 40 is to be fixed on the pedestal 4 by the 40a of annulus section being pressed into to the outer peripheral face of the 4e of annular wall section.Also can be between the 40a of annulus section and the 4e of annular wall section coated with adhesive.
At pedestal 4 dead eye 4h centered by the rotating shaft R of rotor 6 is being set.Bearing unit 12 comprises shell 44 and axle sleeve 46, and rotates freely support rotor 6 with respect to pedestal 4.Shell 44 for example is fixed among the dead eye 4h of pedestal 4 by bonding.Shell 44 has that cylindrical portion and bottom form as one end cup-shaped, and its bottom is bonded and fixed on the pedestal 4 downwards.
Axle 26 is accommodated in the axle sleeve 46.Lubricant 48 is injected into the space between axle 26, propeller boss 28 and flange 30 and the bearing unit 12.
At the inner peripheral surface of axle sleeve 46, be formed with the radial dynamic pressure groove (not shown) of 1 group of herringbone shape in the position that separates up and down.Be formed with first thrust dynamic pressure grooves (not shown) of herringbone shape at the lower surface with the flange 30 of the upper surface subtend of shell 44.Be formed with second thrust dynamic pressure grooves (not shown) of herringbone shape at the upper surface with the flange 30 of the lower surface subtend of the protuberance of axle sleeve 46.When rotor 6 rotation, by made dynamic pressure that lubricant 48 produces by these dynamic pressure grooves in radial direction and rotating shaft R direction support rotor 6.
In addition, also can form at axle 26 the radial dynamic pressure groove of 1 group of herringbone shape.In addition, also the first thrust dynamic pressure grooves can be formed on the upper surface of shell 44, also the second thrust dynamic pressure grooves can be formed on the lower surface of the protuberance of axle sleeve 46.
Axle 26 be and be pressed into and the state that bonds under be fixed on the hole at the center that is arranged on propeller boss 28 and the propeller boss hole that arranges coaxially with the rotating shaft R of rotor 6 in.Flange 30 has toroidal, and the section of flange 30 has the word shape of falling L.Flange 30 for example is fixed on the inner peripheral surface of the dip portion of propeller boss 28 by bonding.
Cylinder-shaped magnet 32 is bonded and fixed at the cylindraceous inner peripheral surface suitable with the barrel surface of the inboard of the propeller boss 28 of cup-shaped roughly.Cylinder-shaped magnet 32 is the rare earth element magnet that is formed by materials such as neodymium, iron, boron.This cylinder-shaped magnet 32 on diametric(al) with 12 salient pole 40b subtends of core body 40.Cylinder-shaped magnet 32 is implemented the driving of 16 utmost points along its all direction with magnetizing.To the surface of cylinder-shaped magnet 32 implementing by electro dipping or spray the antirust processing that application etc. is carried out.
(manufacture method)
Below, the summary of the manufacture method of the slewing 100 of above-mentioned execution mode is described.
At first, prepare between axle sleeve 46 and axle 26, to be injected with lubricant 48 bearing unit 12, have coil 42 core body 40, comprise the propeller boss 28 of the magnet 32 with particular magnetic polarity.Secondly, make core body 40 and pedestal 4 combinations by the method that hereinafter is described in detail.Secondly, utilize the method that hereinafter is described in detail to make bearing unit 12 and pedestal 4 combinations.Secondly, axle 26 is entrenched in the hole of propeller boss, and makes propeller boss 28 and bearing unit 12 combinations.Carry out combination such as utilizing the combination that is pressed into fit, bonding or its etc.Secondly, come supplemental lubrication agent 48 and cram this aperture from aperture (not shown) the insertion fine needle that is arranged on the pedestal 4.Secondly, in order to ensure the conducting of pedestal 4 with bearing unit 12, and the lower end that spreads all over the edge of downside of dead eye 4h and bearing unit 12 applies the electroconductive resin 52 of thermmohardening type.Secondly, carry out high-temperature process and the specific performance checking of the sclerosis that promotes hardening resin 54 or electroconductive resin 52.Then, carry record video disc 8 at propeller boss 28, make data read/write section 10 other members such as grade and pedestal 4 combinations, thereafter, finish slewing 100 through other performance checkings.Above-mentioned steps is to carry out in dust free room.
Secondly, to core body 40 with coil 42 and the step of pedestal 4 combinations are described.When the salient pole 40b that metal wire is wound on core body 40 forms coil 42, be formed on the protrusion of protuberance on every side of salient pole 40b at coil 42.If there is protrusion, then the gap of the lower surface of the upper surface of coil 42 and propeller boss 28 is that winding space reduces.If winding space reduces, the possibility that then exists coil 42 to contact with the lower surface of propeller boss 28.If coil 42 contacts with the lower surface of propeller boss 28, then when propeller boss 28 rotation, send grating.In the worst case, coil 42 breaks and hinders normal rotation sometimes.In addition, if winding space is less, even if then not contact after manufacturing is caused coil 42 to contact with the lower surface of propeller boss 28 because vibrating in rheological parameters' change with time or the transmission, impacting sometimes.Therefore, can consider method that winding space is broadened, but can make so the whole thickening of slewing and run counter to the requirement of slimming.
In addition, can consider after core body 40 is formed with coil 42, coil 42 is applied precharge pressure and the method for axially flattening protrusion along the vertical direction.But core body 40 is fixed on the position of the top side of pedestal 4 sometimes because of the core body alignment error on making.Therefore, in order to keep specific winding space, and all coils 42 is flattened into the thinness corresponding with the core body alignment error.In order to press thinlyyer, and apply larger precharge pressure.In the situation of considering to greatest extent the core body alignment error, draw the precharge pressure that coil 42 is applied and become the greatly result of study of 2000N.If it is large that precharge pressure becomes, then the metal wire of the up and down adjacency in the coil 42 contacts consumingly each other and causes insulating barrier to destroy, this part produce metal wire each other conducting be that the bad possibility of so-called layer short circuit raises.In addition, in the worst case, also produce sometimes broken string.According to experiment, in the situation of the precharge pressure that coil 42 is applied 2000N, layer short circuit is bad and 1 broken string is bad to have observed 6 in 10000 bench teat sample numbers.
With this problem accordingly, in execution mode, make core body 40 and pedestal 4 in conjunction with the time, coil 42 is applied to the plus-pressure F of the scope that hereinafter is described in detail its value.In the method, light below the specific height as long as the protrusion of coil 42 is benchmark from the pedestal 4, just can guarantee winding space.Therefore, the height of the protrusion of and coil 42 large except core body alignment error in fact reaches the situation of the upper limit of foozle, can guarantee to suppress coil 42 with less plus-pressure F to the winding space of the contact of propeller boss 28.Its result can reduce the bad or bad possibility that breaks of layer short circuit that produces coil 42.
Fig. 7 A～C is the major part amplification profile that core body 40 that expression will have a coil 42 is fixed on the step 700 on the pedestal 4.Use has sectional fixture (apparatus for assembling) 702, and this sectional fixture (apparatus for assembling) 702 comprises: to the core body press section 702a of the 40a of annulus section of core body 40 pressurization; Coil press section 702b to the pressurization of the upper surface of coil 42; And the limiting mechanism 702c of limiting coil press section 702b plus-pressure F that coil 42 is applied.Core body press section 702a and coil press section 702b form respectively the concentric toroidal that has jump in short transverse.This jump is made as allowed maximum height from the upper surface of the core body 40 of coil 42.Coil press section 702b is combined with core body press section 702a via limiting mechanism 702c.Limiting mechanism 702c will be restricted to below the specific higher limit the plus-pressure F that coil 42 applies.There is no particular restriction for the formation of limiting mechanism 702c, such as comprising the elastomers such as helical spring.
The core body 40 that comprises coil 42 is kept by core body maintaining part 702d.Under this state, coil press section 702b contacts with coil 42, and core body press section 702a contacts (with reference to Fig. 7 A) with the 40a of annulus section hardly.If core body 40 is mobile downwards, the upper end of the periphery of the EDGE CONTACT annular wall 4e of section in the interior week of the lower surface of the 40a of annulus section of core body 40 at first then.If further press down sectional fixture 702, then core body press section 702a contacts (with reference to Fig. 7 B) with the 40a of annulus section.If further press down sectional fixture 702, then core body press section 702a presses the 40a of annulus section, and the 40a of annulus section is press-fit into the periphery of the 4e of annular wall section.The 40a of annulus section is press-fit into (with reference to Fig. 7 C) till lower end and the position that pedestal 4 contacts.
During this period, coil 42 is applied plus-pressure F and is formed pressurization part 42a by coil press section 702b.Owing to keep plus-pressure F lower by limiting mechanism 702c, therefore produce the bad possibility of layer short circuit and reduce.According to experiment, be restricted in the higher limit with plus-pressure F in the situation of 20N, it is bad to have observed 1 layer short circuit in 10000 bench teat sample numbers, and layer short circuit is bad to be greatly improved.And then, be constrained in the higher limit with plus-pressure F in the situation of 10N, it is bad not observe layer short circuit in 10000 bench teat sample numbers.In addition, if plus-pressure F is excessively low, then coil 42 can not get abundant shaping, raises thereby produce highly bad possibility.Be restricted in the higher limit with plus-pressure F in the situation of 3N, the height of not observing coil 42 in per 10000 bench teat sample numbers is bad.Therefore, by plus-pressure F being limited in the scope of 3～10N, can with the height of coil 42 bad be suppressed at level no problem in the practical application in, it is bad to reduce layer short circuit.
Next, the step 500 that bearing unit 12 is fixed on the pedestal 4 of comparative example 1 described.Fig. 5 is that expression is to the major part amplification stereogram of the step 500 of bearing unit 12 and pedestal 4 irradiation ultraviolet radiation light beams 502.For easy understanding, Fig. 5 describes ultraviolet the end of a thread 510 to be positioned at from the position of bearing unit 12 away from extremely.Fig. 6 A is that expression is to the major part amplification view of the step 500 of bearing unit 12 and pedestal 4 irradiation ultraviolet radiation light beams 502.Fig. 6 B is the C-C line profile of Fig. 6 A.
At first, dead eye 4h is applied the hardening resin 54 with anaerobism hardening and UV cured property.As hardening resin 54, as long as for aqueous resin, just be not particularly limited.In the execution mode, such as the TB1354 that uses threebond joint-stock company to make etc. with the aqueous resin of acrylate as principal component.Aqueous resin take acrylate as principal component since shrink less, so be difficult for producing the gap at contact site (joint portion), the sealing effectiveness that prevents air leakage higher aspect better.The lower surface of bearing unit 12 is embedded among the dead eye 4h of pedestal 4.Leave standstill special time for example after 180 seconds, be present in the clearance portion hardening resin 54a anaerobism sclerosis in the gap of radial direction of dead eye 4h and bearing unit 12.To exposing end gardening resin 54b irradiation ultraviolet radiation light beam 502 (with reference to the Fig. 5) on the edge of dead eye 4h.Particularly, end gardening resin 54b is the band shape existence that justifying of 11.5mm is the wide circle of 1～2mm along the external diameter of the lower surface of bearing unit 12.Ultraviolet beam 502 is by 510 irradiations of 1 ultraviolet the end of a thread.The range of exposures 502a of ultraviolet beam 502 covers the existing scope of end hardening resin 54b.Range of exposures 502a is made as the circle that diameter is about 15mm.The center 502b of ultraviolet beam 502 roughly is positioned on the rotating shaft R.End gardening resin 54b realized the surface sclerosis in 60 seconds afterwards by ultraviolet beam 502 irradiations.Thus, prevent end gardening resin 54b adhering to manufacturing equipment.That is to say that in comparative example 1, bearing unit 12 is that clearance portion hardening resin 54a by anaerobism sclerosis in the gap of bearing unit 12 and the radial direction of dead eye 4h guarantees with respect to the bond strength in manufacturing step of pedestal 4.
In the comparative example 1, for example under the manufacturing of slewing 100 intermittently is 5 seconds situation, in order to ensure 180 seconds time of repose, must use can leave standstill simultaneously at least the equipment of 36 workpiece.Therefore, there are the maximization of manufacturing equipment and the problem of great number.In addition, in the comparative example 1, owing to be to expose to wider scope from 1 ultraviolet the end of a thread 510, so the light quantity of per unit area is lower.In addition, ultraviolet beam 502 is light quantity maximums of the central part of circle, and the light quantity of periphery is reduced to about 50% of central part.End gardening resin 54b is positioned at and compares the lower periphery of light quantity with the central part of range of exposures 502a.Therefore, even if end gardening resin 54b is subject to irradiation in 60 seconds, almost be helpless to the bond strength of bearing unit 12 and pedestal 4 with its case-hardened degree.
According to the result of comparative example 1, recognize maximization and great number in order to suppress manufacturing equipment, problem is to make the end gardening resin 54b between the lower surface of bearing unit 12 and pedestal 4 to harden at short notice to guarantee bond strength.
The inventor draws following opinion by research, and namely in order to make at short notice firmly sclerosis of end gardening resin 54b, following method or formation are comparatively effective, by being used alone or in combination these methods, can solve above-mentioned problem.
The method of (1) shining a plurality of ultraviolet beams from a plurality of ultraviolet the end of a thread.
(2) be divided into the method that the irradiation ultraviolet radiation light beam is come in a plurality of ultraviolet radiation zones territory.
(3) utilize the method for the central part of ultraviolet beam.
(4) make the method for the reduced cross-sectional area of ultraviolet beam.
(5) make the central shaft of ultraviolet beam approach the method for the direction vertical with shadow surface.
The polygonal area of (6) delimiting with a plurality of hardening regions becomes the method that large mode is shone a plurality of ultraviolet beams.
Secondly, the step 300 that bearing unit 12 is fixed on the pedestal 4 of execution mode described.Fig. 3 is that expression is to the major part amplification stereogram of the step 300 of bearing unit 12 and pedestal 4 irradiation ultraviolet radiation light beams 302.For easy understanding, Fig. 3 describes ultraviolet the end of a thread 310 to be positioned at from the position of bearing unit 12 away from extremely.Fig. 4 A is that expression is to the major part amplification view of the step 300 of bearing unit 12 and pedestal 4 irradiation ultraviolet radiation light beams 302.Fig. 4 B is the B-R-B line profile of Fig. 4 A.At first, dead eye 4h is applied the hardening resin 54 with anaerobism hardening and UV cured property.The lower surface of bearing unit 12 is embedded among the dead eye 4h of pedestal 4.Under this state, end gardening resin 54b spreads all over the periphery at edge of the dead eye 4h of the end face of opposition side of the side that rotor 6 is set of bearing unit 12 and pedestal 4.End gardening resin 54b also can expose the edge that is present in dead eye 4h, in addition, also can append on the edge that is coated in dead eye 4h.In the execution mode, step 300 is to carry out before the clearance portion hardening resin 54b anaerobism in being present in the gap of radial direction is hardened.Owing to save the time of anaerobism sclerosis, so the activity duration shortens.
The section shape of ultraviolet beam 302 for example is made as substantially elliptical (comprising circular) or essentially rectangular (comprising roughly square).Therefore, ultraviolet radiation zone territory 302a, 302b, 302c are made as respectively substantially elliptical or essentially rectangular.Ultraviolet radiation zone territory 302a, 302b, 302c have respectively width dimensions W, and the width dimensions D of normal direction of the tangential direction centered by rotating shaft R.
Below, for with UV cured along Zhou Fangxiang with 180 the degree intervals be formed on two on the position situation (hereinafter referred to as the test A), with 120 the degree intervals be formed on three on the position situation (hereinafter referred to as the test B), with 90 the degree intervals be formed on four on the position situations (hereinafter referred to as the test C), the bond strength of extracting the direction of bearing unit 12 from pedestal 4 is described.Under this bond strength is situation more than the 50N, even if carry out continuously follow-up step with the step of irradiation ultraviolet radiation light beam, for example make the chimeric and step of combination of propeller boss 28 and bearing unit 12, it is no problem also to confirm in practical application.Therefore, be to carry out following test under the condition as more than the 50N such as this bond strength.
The experimental condition that shares: tangential direction width dimensions W is 6mm, and the sample number respectively is 10, after making both chimeric and irradiation ultraviolet radiations, at 20 seconds with interior inspection bond strength.
(1) test A (UV cured is the situation at two positions, ultraviolet irradiation time=40 second)
On average=95N
Maximum=135N
Minimum=65N
(2) test B (UV cured is the situation at three positions, ultraviolet irradiation time=15 second)
On average=358N
Maximum=680N
Minimum=140N
(3) test C (UV cured is the situation at four positions, ultraviolet irradiation time=15 second)
On average=360N
Maximum=700N
Minimum=180N
According to the above results, in test A～C, all can within the short time below 40 seconds, obtain required bond strength.In addition, in test B, C, can in shorter 15 seconds, obtain required bond strength.In addition, in test B, C, can obtain to test the higher bond strength of A.Can think that its reason is, the UV cured section that links adjacency each other and the polygonal area the greater that forms can obtain higher bond strength.According to foregoing, in test A～C, can before the sclerosis of the clearance portion hardening resin 54a anaerobism between the outer peripheral face of dead eye 4h and bearing unit 12, carry out follow-up step.
Next, the focal length of adjusting lens changes the width dimensions W of the tangential direction in ultraviolet radiation zone territory, and research end gardening resin 54b obtains the irradiation time T that desired hardness needs.
The experimental condition that shares: ultraviolet the end of a thread 310 is 20mm with the distance L of end gardening resin 54b.
(1) in the situation of W=8mm, T=30 second.
(2) in the situation of W=6mm, T=15 second.
(3) in the situation of W=4mm, T=10 second.
According to the above results, T is shorter for width dimensions W smaller irradiation time.In addition, the situation of W=6 is compared with the situation of W=8, and irradiation time T is obviously shorter.
Secondly, ultraviolet the end of a thread 310 and the distance L of end gardening resin 54b are changed, and research end gardening resin 54b obtain the irradiation time T that desired hardness needs.
The experimental condition that shares: the width dimensions W of the tangential direction in ultraviolet radiation zone territory is 4mm.
(1) in the situation of L=10mm, T=15 second.
(2) in the situation of L=15mm, T=10 second.
(3) in the situation of L=20mm, T=10 second.
(4) in the situation of L=25mm, T=30 second.
According to the above results, be that irradiation time T is the shortest in the scope of 15～20mm the time in distance L.
Next, the angle θ that the advance shaft of ultraviolet beam is become with the rotating shaft of bearing unit 12 changes, and the ratio of the width dimensions D of the normal direction in research ultraviolet radiation zone territory and the width dimensions W of tangential direction be the D/W ratio, and end gardening resin 54b obtain the irradiation time T that desired hardness needs.
The experimental condition that shares: the width dimensions W in ultraviolet radiation zone territory is 4mm, and distance L is 20mm.
(1) in 0 ° situation, D/W ratio=1.00, T=10 second.
(2) in 10 ° situation, D/W ratio=1.02, T=10 second.
(3) in 20 ° situation, D/W ratio=1.06, T=10 second.
(4) in 30 ° situation, D/W ratio=1.15, T=15 second.
(5) in 40 ° situation, D/W ratio=1.31, T=15 second.
(6) in 50 ° situation, D/W ratio=1.56, T=20 second.
(7) in 60 ° situation, D/W ratio=2.00, T=20 second.
According to the above results, in angle θ was scope below 20 °, the D in ultraviolet radiation zone territory was and the width dimensions W of tangential direction circular or square roughly about equally that irradiation time T is the shortest.That is to say that if be scope internal radiation ultraviolet beam below 20 ° at the width dimensions D in ultraviolet radiation zone territory and width dimensions W angle θ about equally, the required time of then hardening shortens, thereby operating efficiency promotes.
Fig. 8 is the curve chart that expression utilizes the inclination number of degrees of the rotor 6 of the slewing 100 that the manufacture method of execution mode makes to distribute.The sample number be 15 and the condition of width dimensions W=4mm, angle θ=20 °, distance L=20mm, irradiation time T=10～15 second under, UV cured is formed on three positions with the intervals of 120 degree along Zhou Fangxiang.As the gradient of rotor 6, and detect poor along the maximum of the height dimension of the video disc mounting surface 28a gained of the mounting record video disc 8 of all orientation measurement propeller boss 28 and minimum value.Measure under in conjunction with front state at record video disc 8 and propeller boss 28.In the curve chart of Fig. 8, transverse axis represents the size of the gradient of propeller boss 28, and the longitudinal axis represents the number of degrees.For example numeral " 1 " the expression gradient of the numeral of transverse axis " 5 " top is that 0～5 μ m person's the number of degrees are 1.In addition, numeral " 5 " the expression gradient of the numeral of transverse axis " 10 " top is that 6～10 μ m persons' the number of degrees are 5.According to this curve chart, the maximum permissible value that can be regarded as with respect to gradient is 50 μ m, infers that fraction defective is fully lowly suppressed.
More than, embodiments of the present invention being illustrated, but it will be understood by those skilled in the art that above-mentioned execution mode is illustration, the combination of these each inscapes can have various variation, and these variation are also located within the scope of the invention.Perhaps execution mode also can be made up each other.
In execution mode, be illustrated making propeller boss 28 and the example that is combined in bearing unit 12 combinations on the pedestal 4, but be not limited thereto.For example also can make the bearing unit 12 and pedestal 4 combinations of 28 combinations of propeller boss.It will be understood by those skilled in the art that such associated methods also locates within the scope of the invention.
In execution mode, to the irradiation area of a plurality of ultraviolet beams all discontinuous example be illustrated, but be not limited thereto.For example also the irradiation area of a plurality of ultraviolet beams is overlapping and continuous on periphery.In addition, for example also the irradiation area of ultraviolet beam present continuously roughly circular.
In execution mode, the example vertical with tangential direction to the direction of ultraviolet beam is illustrated, but is not limited thereto.The direction of ultraviolet beam is tilted towards tangential direction.The width dimensions W of the tangential direction in ultraviolet radiation zone territory is elongated.In addition, the irradiation area of a plurality of ultraviolet beams can be connected to each other.
In execution mode, illustrated that one side is pressed into annulus section to the example of annular wall section to face pressurization one side coil and the rotor subtend via limiting mechanism, but be not limited thereto.Also can one side by the coil press section of keeping the jump of specific short transverse with the core body press section face coil and the rotor subtend pressurization one side be pressed into annulus section to annular wall section.
In execution mode, the formation of so-called outer-rotor type is illustrated, but for example also can be the formation of so-called inner-rotor type.In execution mode, the formation of using the lamination core body is illustrated, but core body can not be the lamination core body also.In execution mode, axle is fixed on epitrochanterian formation is illustrated, still for example also can be the formation of the fixed shaft type as being fixed on the pedestal such as axle.In execution mode, the formation that frame and pedestal are formed is illustrated, but for example also can be the formation that frame is combined with pedestal after forming separately being independent of pedestal.It will be understood by those skilled in the art that above-mentioned formation also locates within the scope of the invention.
Claims (10)
1. the manufacture method of a slewing, this slewing comprises:
Rotor is for mounting record video disc;
Pedestal has dead eye and annular wall section centered by above-mentioned dead eye centered by the rotating shaft of above-mentioned rotor;
Bearing unit freely supports above-mentioned rotor with respect to the said base rotation, and is bonded and fixed in the above-mentioned dead eye;
Core body has the annulus section that is fixed on above-mentioned annular wall section and from above-mentioned annulus section towards the outstanding salient pole of radial direction; And
Coil, coiling metal wire on above-mentioned salient pole and forming; And this manufacture method is characterised in that and may further comprise the steps:
Make the above-mentioned dead eye of above-mentioned bearing unit and said base chimeric, and make hardening resin spread all over the periphery at edge of the above-mentioned dead eye of the lower surface of above-mentioned bearing unit and said base; And
In the domain of the existence that above-mentioned hardening resin exists, the Zhou Fangxiang along this domain of the existence is positioned at a plurality of ultraviolet radiation zones territory difference irradiation ultraviolet radiation light beam of diverse location.
2. the manufacture method of slewing according to claim 1 is characterized in that:
The step of shining above-mentioned ultraviolet beam is to carry out in the mode midway of the domain of the existence of above-mentioned hardening resin with the centre of above-mentioned ultraviolet beam.
3. the manufacture method of slewing according to claim 1 and 2 is characterized in that:
The step of shining above-mentioned ultraviolet beam is to shine simultaneously above-mentioned ultraviolet beam from a plurality of ultraviolet the end of a thread corresponding with above-mentioned each ultraviolet radiation zone territory.
4. the manufacture method of each described slewing in 3 according to claim 1 is characterized in that:
The step of shining above-mentioned ultraviolet beam is to be defined as in the situation at center at the rotating shaft with bearing unit, be substantially equal to the mode of the width dimensions of tangential direction with the width dimensions of the normal direction in above-mentioned ultraviolet radiation zone territory, adjust above-mentioned ultraviolet beam advance shaft angle and carry out.
5. the manufacture method of each described slewing in 4 according to claim 1 is characterized in that may further comprise the steps:
One in the face of face above-mentioned coil and above-mentioned rotor subtend pressurization, and one side is pressed into above-mentioned annulus section to above-mentioned annular wall section.
6. slewing is characterized in that comprising:
Rotor is for mounting record video disc;
Pedestal has dead eye and annular wall section centered by above-mentioned dead eye centered by the rotating shaft of above-mentioned rotor;
Bearing unit freely supports above-mentioned rotor with respect to the said base rotation, and is bonded and fixed in the above-mentioned dead eye;
Core body has the annulus section that is fixed on above-mentioned annular wall section and from above-mentioned annulus section towards the outstanding salient pole of radial direction; And
Coil, coiling metal wire on above-mentioned salient pole and forming; And
Above-mentioned bearing unit is entrenched in the above-mentioned dead eye of said base, spread all over the lower surface of above-mentioned bearing unit and said base above-mentioned dead eye the edge and have hardening resin,
In above-mentioned hardening resin, along the edge illumination ultraviolet beam of the above-mentioned end face of above-mentioned bearing unit and the zone of hardening is that UV cured section is configured on the diverse location of Zhou Fangxiang, and be formed at least on two positions.
7. slewing according to claim 6 is characterized in that:
In above-mentioned hardening resin, above-mentioned UV cured section is formed with three or everywhere at the diverse location of Zhou Fangxiang.
8. it is characterized in that according to claim 6 or 7 described slewings:
Add pressure surface with the face of the lower surface subtend of above-mentioned rotor flatly pressurizes when above-mentioned coil is included in above-mentioned annulus section and is press-fit into above-mentioned annular wall section pair,
Above-mentionedly add above-mentioned annulus section that pressure surface forms part the highest on its direction of principal axis and be of a size of below the specific maximum permissible value as the direction of principal axis of benchmark.
9. the manufacture method of a slewing, this slewing comprises:
Rotor is for mounting record video disc;
Pedestal has the dead eye centered by the rotating shaft of above-mentioned rotor; And
Bearing unit freely supports above-mentioned rotor with respect to the said base rotation, and is bonded and fixed in the above-mentioned dead eye; And this manufacture method is characterised in that and may further comprise the steps:
Make the above-mentioned dead eye of above-mentioned bearing unit and said base chimeric, and make hardening resin spread all over the periphery at edge of the above-mentioned dead eye of the lower surface of above-mentioned bearing unit and said base; And
With the centre in ultraviolet radiation zone territory in the mode irradiation ultraviolet radiation light beam midway of the domain of the existence of above-mentioned hardening resin.
10. apparatus for assembling in order to assemble slewing claimed in claim 6, is characterized in that comprising:
The core body press section is to the pressurization of the annulus section of above-mentioned core body and the annulus section of above-mentioned core body is combined with the annular wall section of said base;
The coil press section when pressing down above-mentioned core body press section to said base, is the first surface pressurization to the face with above-mentioned rotor subtend of above-mentioned coil; And
Limiting mechanism is configured between above-mentioned core body press section and the above-mentioned coil press section, the plus-pressure that the first surface of above-mentioned coil is applied in order to limit above-mentioned coil press section, and this plus-pressure is limited in the scope of 3～10N.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-164373 | 2011-07-27 | ||
| JP2011164373A JP2013030237A (en) | 2011-07-27 | 2011-07-27 | Rotation device and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102904399A true CN102904399A (en) | 2013-01-30 |
| CN102904399B CN102904399B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210274400.2A Expired - Fee Related CN102904399B (en) | 2011-07-27 | 2012-07-25 | Rotary device, manufacturing method thereof and assembling apparatus thereof |
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| JP (1) | JP2013030237A (en) |
| CN (1) | CN102904399B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001040010A (en) * | 1999-08-02 | 2001-02-13 | Kansai Paint Co Ltd | Non-aqueous polymer dispersion and coating composition containing the polymer |
| US20010040010A1 (en) * | 1999-07-08 | 2001-11-15 | International Business Machines Corporation | Concentrated UV light curing of adhesive for pivot applications |
| CN1930623A (en) * | 2004-03-08 | 2007-03-14 | 株式会社Kitano | Ultraviolet irradiation device for optical disk and ultraviolet irradiation method for optical disk |
| US20100328819A1 (en) * | 2009-06-24 | 2010-12-30 | Alphana Technology Co., Ltd. | Disk drive device for rotating a disk |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114106A (en) * | 2003-10-09 | 2005-04-28 | Sankyo Seiki Mfg Co Ltd | Hydrodynamic bearing device, its manufacturing method and disc driving device |
| JP2007226083A (en) * | 2006-02-27 | 2007-09-06 | Epson Imaging Devices Corp | Method and apparatus for manufacturing electro-optic device |
-
2011
- 2011-07-27 JP JP2011164373A patent/JP2013030237A/en not_active Ceased
-
2012
- 2012-07-25 CN CN201210274400.2A patent/CN102904399B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010040010A1 (en) * | 1999-07-08 | 2001-11-15 | International Business Machines Corporation | Concentrated UV light curing of adhesive for pivot applications |
| JP2001040010A (en) * | 1999-08-02 | 2001-02-13 | Kansai Paint Co Ltd | Non-aqueous polymer dispersion and coating composition containing the polymer |
| CN1930623A (en) * | 2004-03-08 | 2007-03-14 | 株式会社Kitano | Ultraviolet irradiation device for optical disk and ultraviolet irradiation method for optical disk |
| US20100328819A1 (en) * | 2009-06-24 | 2010-12-30 | Alphana Technology Co., Ltd. | Disk drive device for rotating a disk |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102904399B (en) | 2015-02-25 |
| JP2013030237A (en) | 2013-02-07 |
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