CN101263312A - Rolling bearing and main shaft supporting structure for main motor of railway vehicle - Google Patents
Rolling bearing and main shaft supporting structure for main motor of railway vehicle Download PDFInfo
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- CN101263312A CN101263312A CNA2006800333713A CN200680033371A CN101263312A CN 101263312 A CN101263312 A CN 101263312A CN A2006800333713 A CNA2006800333713 A CN A2006800333713A CN 200680033371 A CN200680033371 A CN 200680033371A CN 101263312 A CN101263312 A CN 101263312A
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Abstract
A cylindrical roller bearing (31) has an inner ring (32), an outer ring (33) having the same axial width as the inner ring (32) and having insulating layers formed at its outer diameter surface and its both end surfaces, cylindrical rollers (34) as rolling bodies interposed between the inner ring (32) and the outer ring (33), a retainer (35) for keeping the intervals between the cylindrical rollers (34), and seals (36) as seal members for sealing both ends of the bearing. The seals (36) are formed by injection molding of resin material such that they project in a square-C cross-sectional shape from both end faces of the inner ring (32) and those of the outer ring (33).
Description
Technical field
The present invention relates to the main shaft supporting structure of a kind of rolling bearing and main motor for railway vehicle.
Background technique
The rolling bearing that is used for the main motor of rail truck must be able to prevent to sneak into foreign matter from the outside, and can prolong maintenance period, keeps lubricity for a long time.Particularly, recently because from for checking because the purpose of the deterioration that long-time use causes etc., in accordance with regulations vehicle driving distance and cycle of checking, because the increase of moving vehicle number reaches the raising of the technical merit relevant with rail truck and further prolongs, so the life-span of rolling bearing more and more becomes problem.Therefore, used band Sealing rolling bearing with Sealing of having enclosed lubricating grease.
At this, an example to the formation of the rolling bearing that is used for this purposes carries out simple declaration, and band Sealing rolling bearing has outer ring, inner ring, be configured in the cylindrical roller as rolling element between outer ring and the inner ring, keep the guard ring of cylindrical roller and be positioned at the axial both sides of cylindrical roller and the pair of seal members of having enclosed lubricating grease.
Using on the main motor that above-mentioned such rail truck is used under the situation of rolling bearing, for making the inside energising of rolling bearing, each component parts for rolling bearing is necessary to implement insulation processing.Insulation processing be by for example on the surface of outer ring spraying plating pottery etc., form insulating properties tunicle on its surface or wait and carry out with parts covering with insulating properties.
At this, be that Sealing also requires to have insulating properties for the component parts of rolling bearing, the insulating property of Sealing are specifically if insulating resistance value is low, then because galvanic corrosion might damage rolling bearing.
For example, roller bearing 101 as shown in figure 15 possesses inner ring 102, outer ring 103, is configured between inner ring 102 and the outer ring 103 cylindrical roller 104 as rolling element, keeps the guard ring 105 at interval of cylindrical roller 104 and the Sealing 106 of having enclosed lubricating grease.
In addition, the roller bearing 101 that uses on the rail truck main motor because the damage of the bearing that galvanic corrosion etc. causes, is formed with the insulation tunicle for preventing on the outer diametric plane of outer ring 103 and both ends of the surface.The insulation tunicle forms by spraying plating pottery etc.
And then, because the rail truck main motor in outdoor application, so forming by the bearing peripheral construction in the open bearing of grease box, exists because the rotten problem of generation lubricating grease of sneaking into of dust.So roller bearing 101 is the deterioration of the lubricating grease that prevents to be caused by sneaking into of dust, prolongs maintenance period, adopts sealed bearing.
Under the situation of the roller bearing 101 of above-mentioned formation, because the bearing volume inside is very little, so exist the lubricating grease that to enclose q.s to guarantee the problem of rail truck main motor with the bearing life of necessity of bearing.
But, as the means that address the above problem, though can consider to improve the filling ratio of lubricating grease with respect to the inner space volume, but in this case, during the bearing rotation, exist the stirring resistance of lubricating grease to increase when particularly starting, cause the problem that bearing temperature sharply rises, so and improper.
So, in sealed bearing, can guarantee the roller bearing of the lubricating grease of q.s in bearing inside, for example be described in TOHKEMY 2003-13971 communique and TOHKEMY 2004-346972 communique.
At this, be recorded in the roller bearing 111 in the TOHKEMY 2003-13971 communique, as shown in figure 16, possess: inner ring 112, the outer ring 113 that axial amplitude is long, be configured in cylindrical roller 114 between inner ring 112 and the outer ring 113, keep cylindrical roller 114 the interval guard ring 115 and be the Sealing 116 of L font with the sectional shape of grease filled bearing inside.The metal-cored 116a of Sealing 116 is covered by insulative resin 116b.In addition, on the outer diametric plane of outer ring 113 and both ends of the surface, be formed with the insulation tunicle.
In addition, be recorded in the roller bearing 121 in the TOHKEMY 2004-346972 communique, as shown in figure 17, possess inner ring 122, outer ring 123, be configured in cylindrical roller 124 between inner ring 122 and the outer ring 123, keep cylindrical roller 124 the interval guard ring 125 and from the both ends of the surface of inner ring 122 and outer ring 123 with the outstanding Sealing 126 of " コ " font, the outer diametric plane of outer ring 123 and both ends of the surface are covered by insulating material 127.
In the roller bearing of in above-mentioned each communique, putting down in writing 111,121, because play the effect of grease box, so increased the lubricating grease amount that bearing inside can be enclosed from the outstanding Sealing 116,126 of bearing face.
But, in the roller bearing of above-mentioned formation,, then exist the interior lubricating grease of grease box to be partial to the problem of bearing bottom if the rising of temperature descends the viscosity of lubricating grease when rotate owing to bearing.If this lubricating grease flows into bearing inside in large quantities, then stirring resistance increases, and has the problem that causes that temperature sharply rises.
So roller bearing 121 as shown in figure 17 in order to keep the lubricating grease in the grease box equably, utilizes from the outstanding weir 128 of the internal face of Sealing 126 grease box is distinguished into a plurality of cut zone.Thus, can prevent lubricating grease deflection bearing bottom.
The roller bearing 111 that is recorded in the TOHKEMY 2003-13971 communique uses metal metal-cored 116a at Sealing 116.Because 116b covers with insulative resin, thus no problem under common user mode, but under the situation of high voltage load, there is the danger of roller bearing 111 breakages after the energising.In addition, the roller bearing of putting down in writing in TOHKEMY 2004-346972 communique 121 is not mentioned the material of Sealing 126.
In addition, the Sealing 126 that in roller bearing 121 as shown in figure 17, uses, because have a plurality of independently cut zone, enclose lubricating grease so must grease nipple 129 be set in each cut zone, existing has not only increased the needed the number of working processes number of inclosure lubricating grease significantly, and the problem that also complicates of the structure of Sealing 126.
On the other hand, ball bearing 131 as shown in figure 18 possess inner ring 132, outer ring 133, be configured in ball 134 between inner ring 132 and the outer ring 133 as rolling element, keep ball 134 the interval guard ring 135 and be configured in inner ring 132 and outer ring 133 between Sealing 136.
The ball bearing 131 that is used for the rail truck main motor because the damage of the bearing that galvanic corrosion causes, is the insulation bearing that is formed with insulation tunicle 133a on the outer diametric plane of outer ring 133 and both ends of the surface in order to prevent.Insulation tunicle 133a forms by megohmite insulants such as spraying plating potteries.
In addition, the rail truck main motor, exists owing to sneaking into of dust causes the problem that lubricating grease worsens so forming by the bearing peripheral construction in the open bearing of grease box because be in outdoor application.So,, prolong maintenance period, preferably sealed bearing for preventing the deterioration of sneaking into the lubricating grease that causes owing to dust.
But, under the situation of the ball bearing 131 of above-mentioned formation, because the bearing interior space volume is little, so exist the lubricating grease that can not enclose appropriate amount to guarantee the problem of rail truck main motor with the bearing life of necessity of bearing.
As the means that address the above problem, though can consider to improve the filling ratio of lubricating grease with respect to the inner space volume, but in this case, because when bearing rotates, particularly when starting, exist the stirring resistance of lubricating grease to increase, so the problem that the temperature of bearing sharply rises is and improper.
And then, under ball bearing 131 that will be as shown in figure 18 is fixed on situation on the housing 137, as shown in figure 19, need the shoulder height h of regulation.So under ball bearing 131 was small-sized situation, the lower end of housing 137 and outer ring 133 thickness that only approaches to the insulation tunicle 133a of outer ring 133 that becomes separated.
At this moment, the creepage distance of outer ring 133 and housing 137 becomes the thickness δ of insulation tunicle 133a in the lower end of insulation tunicle 133a, very little.In addition, because outer ring 3 and housing 137 are conductors of metal etc., thus if producing certain above potential difference between housing 137 and the outer ring 133, then along the lower end generation creeping discharge of insulation tunicle 133a, the danger that ball bearing 131 existence damage owing to galvanic corrosion.And what is called " creeping discharge " is meant under the situation of the potential difference more than the both sides across the insulation tunicle produce necessarily in this manual, along the phenomenon of insulation tunicle surface discharge.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of rolling bearing with good insulation performance performance.And, a kind of structure of the Sealing with grease box is provided and has simplified the rolling bearing of enclosing the operation of lubricating grease.
In addition, the present invention also aims to provide a kind of and can not cause the rolling bearing of damage and the main shaft supporting structure of main motor for railway vehicle by galvanic corrosion.
The rolling bearing relevant with the present invention possesses the lasso that comprises inner ring and outer ring; Be configured in a plurality of rolling elements between inner ring and the outer ring; And the sealed member at stuffing box bearing two end part.And, the aperture surface of inner ring and end face, and the outer diametric plane and the end face of outer ring be provided with isolation layer, sealed member is formed by resin material, and is outstanding with the sectional shape of コ font from the both ends of the surface of inner ring and outer ring.
The rolling bearing of above-mentioned formation is because the sealed member of " コ " font plays a role as grease box, so can be at the inner lubricating grease of enclosing q.s of bearing.And,, improved the insulating property of bearing integral by the insulation tunicle being set and the resin of the high-insulativity material as sealed member being used.
Preferably, sealed member has a plurality of cut zone of dividing in a circumferential direction by from the outstanding weir of internal face.Thus, flow out to other cut zone, so even under the situation that the viscosity of lubricating grease reduces, can prevent that also lubricating grease is to bearing bottom deflection because can prevent to be sealing into the lubricating grease of each cut zone.
Preferably, sealed member has the continuum that is communicated with between adjacent cut zone.Like this, by the continuum that connects adjacent cut zone is set, can be easily to whole cut zone repack with greases.The result can simplify the structure and the grease-enclosed operation of sealed member.
More preferably, the continuum is positioned at the open end side of sealed member.Thus, because can easily remove the lubricating grease of too much filling, can enclose the lubricating grease of appropriate amount.
In addition, the specific volume resistance of sealed member is 2 * 10
10More than the Ω cm.In the rolling bearing that uses as insulation bearing, even also require to have insulating properties for sealed member, insulating resistance value must be more than 100M Ω (megohm).At this, the specific volume resistance by making sealed member is 2 * 10
10More than the Ω cm, can make insulating resistance value more than 100M Ω, can guarantee insulating property, thereby can prevent because the damage of the rolling bearing that galvanic corrosion produces.
More preferably, the material of sealed member contains from by polyacetal resin, polybutylene-terephthalate resin, polyphenylene sulfide, acrylic resin, polyamide resin, fluororesin, polyethylene resin, ABS (ACRYLONIRILE BUTADIENE STYRENE: the compound of more than one that select the group that resin is formed acrylonitrile-butadiene-styrene (ABS)).
Contain more than one the sealed member of from such group, selecting of compound, because specific volume resistance is 2 * 10
10More than the Ω cm, insulating property are good, thus even use, there is not the problem that causes galvanic corrosion as the material of the sealed member that possesses in the rolling bearing yet, and the problem that rolling bearing is damaged.
In addition, being characterized as of lasso has chamfered section in the face of on the bight of sealed member, and this chamfered section is covered by the insulation tunicle.The rolling bearing of above-mentioned formation is because only increase the amount of the axial length of chamfered section at the creepage distance of ring face, so improved the insulating property of bearing.At this moment, the axial length by making chamfered section is more than 1mm, and the bearing that can be used as the running shaft of supporting rail truck main motor uses.
Preferably, the creepage distance by the definition of the axial length of the insulation tunicle on the bight that is positioned at lasso is more than the 1mm.Thus, even under the environment that produces big potential difference between the peripheral construction of rail truck main motor etc. and the bearing, use, also can obtain to avoid the rolling bearing of the damage that causes by galvanic corrosion.
Preferably, sealed member has protuberance in the end with the lasso butt, and lasso has the recess of admitting protuberance.Thus, sealed member can be fixed on the lasso reliably.In addition, sealed member can easily be installed.
In other technological scheme of the present invention, possess the above-mentioned rolling bearing and the main shaft of main motor for railway vehicle, main shaft is supported by rolling bearing.By forming such structure, for example, can provide a kind of because the main shaft supporting structure of the main motor for railway vehicle that the problem of the damage that galvanic corrosion causes is less.
The present invention uses as the material of sealed member by insulation tunicle and resin that insulating properties is high are set, and can improve the insulating property of bearing.And,, can obtain having simplified the structure of sealed member and the rolling bearing of lubricating grease padding by on the sealed member of grease box, cut zone and continuum being set with " コ " font.
In addition, according to the present invention, because the specific volume resistance by making sealed member is 2 * 10
10More than the Ω cm, can make insulating resistance value more than 100M Ω,, prevent the damage of rolling bearing so can guarantee insulating property.
In addition, the present invention is because by on the bight of facing with sealed member of lasso chamfered section being set, can guarantee necessary creepage distance for avoiding galvanic corrosion, so can obtain the good rolling bearing of insulating property.
In addition, such rolling bearing and the main shaft supporting structure that possesses the main motor for railway vehicle of the main shaft that uses in the main motor that rail truck is used for example, do not have to cause owing to galvanic corrosion the misgivings of damage.
Description of drawings
Fig. 1 is the figure of the expression roller bearing relevant with an embodiment of the invention;
Fig. 2 is the plan view of the Sealing of Fig. 1;
Fig. 3 is the amplification sectional view of the Sealing of Fig. 1;
Fig. 4 is other mode of executions of Sealing that expression is used for the roller bearing of Fig. 1, and promptly the wall of the wall of inner ring side and outer ring side is the figure of the example of same size;
Fig. 5 is other mode of executions of Sealing that expression is used for the roller bearing of Fig. 1, i.e. the figure of the wall of the outer ring side example longer than the wall of inner ring side;
Fig. 6 is other mode of executions of Sealing that expression is used for the roller bearing of Fig. 1, promptly is provided with the figure of the example of continuum at radial outside;
Fig. 7 is other mode of executions of Sealing that expression is used for the roller bearing of Fig. 1, promptly is provided with the figure of the example of continuum at radially inner side;
Fig. 8 is the sectional view of the expression rolling bearing relevant with other mode of execution of the present invention;
Fig. 9 is the figure of the profile of the sealed member that possesses of expression rolling bearing;
Figure 10 is the sectional view of sealed member shown in Figure 9;
Figure 11 is the synoptic diagram of the test film of expression drum;
Figure 12 is the figure of expression major component of the present invention, the i.e. enlarged view of the Q portion of Figure 13;
Figure 13 is the figure of the expression ball bearing relevant with other mode of execution of the present invention;
Figure 14 is the figure of the state before the fine finishing of Q portion of expression Figure 13;
Figure 15 is the figure of the roller bearing of the existing standard of expression;
Figure 16 is that the axial width of expression inner ring is bigger than the outer ring, the figure of an example of the roller bearing that bearing interior space is extended;
Figure 17 is that expression makes Sealing outstanding from the end face of inner ring and outer ring, makes other the figure of example of roller bearing that bearing interior space enlarged;
Figure 18 is the figure of the ball bearing of the existing standard of expression;
Figure 19 is the enlarged view of the P portion among Figure 18.
Embodiment
With reference to Fig. 1, the roller bearing relevant with an embodiment of the invention 31 is described.
Isolation layer forms by megohmite insulants such as spraying plating potteries.In addition, in bearing interior space, be filled with lubricating grease.As lubricating grease, for example, using lithium is that lubricating grease or urethane are lubricating grease.
As above-mentioned formation, by forming isolation layer on the outer diametric plane of outer ring 33 and both ends of the surface, and Sealing 36 uses the high resin material of insulating properties, can improve the insulating property as roller bearing 31 integral body.
In addition, because by grease box being divided into a plurality of cut zone 36a, even under the situation that the viscosity of lubricating grease descends when bearing rotates, also can prevent to flow out other cut zone 36a, so can keep lubricating grease equably at the lubricating grease that each cut zone 36a encloses.
Under the situation of above-mentioned Sealing 36 repack with greases, at first with the opening end of Sealing 36 with sealings such as Sealings, inject lubricating grease then.The lubricating grease that is injected in the Sealing 36 at first is full of a cut zone 36a, moves via the adjacent to the left and right cut zone 36a of continuum 36b then.After lubricating grease has been full of all cut zone 36a, remove the Sealing of opening end, the unnecessary lubricating grease of continuum 36b is removed.
Like this, by the continuum 36b of connection is set between adjacent cut zone 36a, can easily make lubricating grease be full of all cut zone 36a.By like this, can simplify the structure of Sealing 36 and the filling operation of lubricating grease.And, because continuum 36b is set, can easily remove the unnecessary lubricating grease of filling, so can realize enclosing the lubricating grease of appropriate amount by open end side at Sealing 36.
And weir 37 as shown in Figure 2 though represent with the impartial example that is provided with on the circumference of Sealing 36, is not limited only to this, also can emphasis be arranged on can effectively prevent on the position of lubricating grease deflection, in addition, the weir 37 of any number can be set also.
In addition, Sealing 36 as shown in Figure 3, though express and make the wall example longer that is positioned at inner ring 32 sides in order to improve sealability than the wall that is positioned at outer ring 33 sides, but not only be defined in this, for example, as shown in Figure 4, also can be that two walls are equally long, as shown in Figure 5, also can be that the wall of outer ring one side is longer than the wall of inner ring one side.And, in Fig. 4 and Fig. 5, reference marks 46,56 expression Sealings, reference marks 46b, 56b represent the continuum, reference marks 47,57 expression weirs.
And, though Sealing 36 as shown in Figure 3 shows the example that is provided with continuum 36b in open end side, be not limited only to this, also can be arranged on radial outside as shown in Figure 6, as shown in Figure 7, also can be arranged on radially inner side.And, also above-mentioned example can be made up, be provided with in many places.And, in Fig. 6 and Fig. 7, reference marks 66,76 expression Sealings, reference marks 66b, 76b represent the continuum, reference marks 67,77 expression weirs.
In the roller bearing 31 of above-mentioned formation, standard piece can be used in inner ring 32 and outer ring 33.Thus, can control the rising of the cost of product.And,, can simplify the labyrinth structure of circumferential component, so can realize the miniaturization and the lightweight of motor because by forming sealed bearing.
And, in each above-mentioned mode of execution,, be not limited only to this though example shows the example that the roller bearing of isolation layer is arranged on the outer diametric plane of outer ring and both ends of the surface, also can on the aperture surface of inner ring and both ends of the surface, form isolation layer.Because it is little that inner ring aperture surface and diametric plane outside the outer ring are compared the spraying plating area, so, can reduce the spraying plating cost by the insulation of spraying plating on inner ring aperture surface tunicle.In addition, because isolation layer do not interfere with the joining portion of Sealing and lasso, so the fixation method of Sealing is become simple.
In addition, in the above-described embodiment, though with roller bearing 31 is that example is represented, but be not limited only to this, also go for tapered roller bearing, self-aligning roller bearing, deep groove ball bearing, four-point contact ball, angular contact ball bearing etc., no matter rolling element is roller or ball, can be applicable to all rolling bearings.
Fig. 8 is expression the sectional view as the insulation bearing 11 of rolling bearing relevant with other mode of execution of the present invention.Fig. 9 is the figure as the profile of the Sealing 16a of sealed member that expression insulation bearing 11 possesses.Figure 10 is the sectional view of Sealing 16a shown in Figure 9.With reference to Fig. 8, Fig. 9 and Figure 10, insulation bearing 11 possesses outer ring 12, inner ring 13, is configured in the cylindrical roller 14 between outer ring 12 and the inner ring 13, the guard ring 15 of maintenance cylindrical roller 14 and pair of seal members 16a, the 16b that disposes in the axial both sides of cylindrical roller 14.
Like this, Sealing 16a, the 16b of the degree of depth are axially being arranged, the lubricating grease 17 of unnecessary amount can be sealing in the grease box 16c in Sealing 16a, the 16b as cut zone by possessing.Because Sealing 16a, 16b are identical construction, so below, omit about the explanation of Sealing 16b.
Above-mentioned insulation bearing 11, because be the insulation bearing that is used for the main motor that rail truck uses, so, also require to have high insulating property even be Sealing 16a for component parts, specifically, require the insulating resistance value of Sealing 16a more than 100M Ω.Like this, in the following test film with drum that adapts to actual use condition, specific volume resistance is preferably in more than the following value.
At this, the specific volume resistance that Sealing 16a is required calculates as following.Figure 11 is the figure that expression adapts to the test film with drum 20 of actual use condition.In addition, formula 1 is the theoretical formula of insulating property of the relation of expression insulating resistance value and volume resistance value.And in Figure 11 and formula 1, insulating resistance value represents that with R specific volume resistance represents that with ρ width dimensions represents that with B internal diameter size represents that with D thickness size is represented with t.With reference to Figure 11 and formula 1, for the test film 20 of the drum of internal diameter φ 102mm * width 10mm * thickness 1.5mm, on reality was used, the insulating resistance value of necessary minimum was 100M Ω (megohm).Therefore, its substitution is represented the theoretical formula of insulating property of the relation of insulating resistance value and volume resistance value is in the formula 1, calculated specific volume resistance.
[formula 1]
The specific volume resistance of calculating like this is about 2 * 10
10Ω cm.Therefore, because by making specific volume resistance 2 * 10
10More than the Ω cm, can guarantee the insulating property of the necessity when reality is used, so can not cause the damage of insulation bearing 11 owing to galvanic corrosion.
As the material of the Sealing 16a that requires such insulating property, can be to contain from by polyacetal resin, polybutylene-terephthalate resin, polyphenylene sulfide, acrylic resin, polyamide resin, fluororesin, polyethylene resin, ABS (ACRYLONIRILE BUTADIENESTYRENE: the compound of more than one that select the group that resin is formed acrylonitrile-butadiene-styrene (ABS)).Because the insulating property height of these compounds can be guaranteed above-mentioned specific volume resistance, so very suitable as the material of Sealing 16a.And, the material of Sealing 16a, in above-mentioned group, polyamide resin is only.
In addition, even because for possessing the such rolling bearing and the main shaft of main motor for railway vehicle, the main shaft supporting structure of the main motor for railway vehicle that main shaft is supported by above-mentioned rolling bearing can be owing to galvanic corrosion produce damage, so can use for a long time yet.
And, in the above-described embodiment, though pair of seal members 16a, 16b that insulation bearing 11 adopts have axially having the grease box 16c of the degree of depth, are not limited only to this, a pair of Sealing 16a, 16b is even without also passable at the grease box 16c that axially has the degree of depth.In this case,, must supply with lubricating grease etc. termly, because insulating property are good, so can prevent the damage that the galvanic corrosion owing to rolling bearing produces from the outside though it is very difficult to keep long lubricity.
In addition, the structure of insulation bearing 11 also can be only to possess Sealing 16a or only possess Sealing 16b.And, though the grease box 16c of Sealing 16a, 16b has been distinguished by a plurality of weir 16d of portion, be not limited only to this, also the 16d of weir portion can be set, and make Sealing 16a, 16b have a grease box 16c.
And the rolling element that possesses as insulation bearing 11 though used cylindrical roller in the above-described embodiment, also can use other rolling element such as needle-like roller, bar-shaped roller.
Below, with reference to Figure 12～14, further the ball bearing 21 relevant with other mode of execution of the present invention described.
As shown in figure 13, ball bearing 21 is insulation bearings, and it possesses: as the inner ring 22 of lasso; Outer ring 23 with insulation tunicle 23a; Be configured in ball 24 between inner ring 22 and the outer ring 23 as rolling element, keep ball 24 the interval guard ring 25 and from the axial two end part of inner ring 22 and outer ring 23 with the outstanding Sealing 26 of the sectional shape of " コ " font as resin system sealed member.
As shown in figure 12, outer ring 23 has chamfered section 23c on the bight that regards to Sealing 26.In addition, be formed with insulation tunicle 23a for covering outer diametric plane, both ends of the surface and chamfered section 23c.Insulation tunicle 23a forms by megohmite insulants such as spraying plating potteries.
In the ball bearing 21 of above-mentioned formation, be δ at the thickness of establishing insulation tunicle 23a
1, the axial width of establishing chamfered section 23c is w
1The time, the creepage distance on the bight of outer ring 23 can be expressed as δ
1+ w
1In addition, this creepage distance is set in more than the 1mm.Thus, even between peripheral parts such as rail truck main motor and bearing, produce under the situation about using in the environment of big potential difference, also can obtain to avoid the ball bearing 21 of the damage of the bearing that causes by galvanic corrosion.
And so-called in this manual " creepage distance " be meant along the minimum range on the surface that is sandwiched in two insulating elements between conductor, on the bight of outer ring shown in Figure 12 23, and the axial length of the tunicle 23a that is defined as insulating.
And, so-called in this specification " approximate ' コ ' font " not only is meant the such " コ " font of Sealing 26 as shown in figure 13, and refer on wall, form irregular situation or circular shape etc., comprise that a part is from all outstanding shapes of other part.
In addition, Sealing 26 has protuberance 26a in the end with outer ring 23 butts, and outer ring 23 has the recess 23b that accepts protuberance 26a on the diametric plane within it.When packing Sealing 26 into,,, Sealing 26 can be installed simple and reliablely so carry out the stationary phase ratio with utilizing fixed block etc. because the chimeric back of this protuberance 26a and recess 23b is fixing.
And, spraying plating megohmite insulant on the outer ring 23 of above-mentioned formation, as shown in figure 14, the insulation tunicle 23a that forms at chamfered section 23c is than other part thickening (oblique line portion).This part promptly can keep ortho states like this, also can remove so that thickness becomes impartial with methods such as machinings.
In addition, on the ball bearing 21 of above-mentioned formation, inner ring 22 can use standard piece.Thus, can control the raising of the cost of product.And, by forming sealed bearing, because can simplify the labyrinth structure that constitutes by circumferential component, so can realize the miniaturization and the lightweight of motor.
In the above-described embodiment, though be that example is represented chamfered section 23c has been carried out the c chamfering as shown in figure 12, but be not limited only to this, R chamfering or ladder difference etc. also can be set, the bight with Sealing 26 is faced mutually of outer ring 23 is retreated vertically from end face.
In addition, in the above-described embodiment, though example shows the example of the ball bearing that has the insulation tunicle on the outer diametric plane of outer ring and both ends of the surface, being not limited only to this, also can be to form the tunicle that insulate on the aperture surface of inner ring and both ends of the surface.Because compare with diametric plane outside the outer ring, the spraying plating area of inner ring aperture surface is little, so can reduce the cost of spraying plating by spraying plating megohmite insulant on the inner ring aperture surface.
In addition, in the above-described embodiment, though example shows the example that Sealing 26 is fixed on the rotary-type bearing of inner ring on the outer ring 23 and is illustrated, be not limited only in this, the present invention also is applicable to Sealing is fixed on the rotary-type bearing in outer ring on the inner ring.
In addition, in the above-described embodiment, though example shows the example of Sealing 26 from the outstanding shape of the end face of inner ring 22 and outer ring 23,, be not limited only to this, the present invention can also be applicable to not from the outstanding rolling bearing with standard seal part of the end face of inner ring 22 and outer ring 23.
And, in the above-described embodiment, though the example with ball bearing 21 is represented, but be not limited only to this, rolling bearings such as roller bearing, tapered roller bearing, self-aligning roller bearing, deep groove ball bearing, four-point contact ball, angular contact ball bearing, and other all insulation bearings all are suitable for.
More than, though with reference to accompanying drawing embodiments of the present invention are illustrated, the present invention not only is defined in illustrated mode of execution.For illustrated embodiment, with the present invention in same scope, perhaps in impartial scope, can apply various corrections and distortion.
Industrial applicibility
This invention can effectively utilize in the rolling bearing in uses such as rail truck main motors In.
Claims (14)
1. rolling bearing, it possesses:
The lasso that comprises inner ring and outer ring;
Be configured in a plurality of rolling elements between described inner ring and the described outer ring; And
The sealed member at stuffing box bearing two end part,
The aperture surface of described inner ring and end face, and the outer diametric plane and the end face of described outer ring be provided with isolation layer,
Described sealed member is formed by resin material, and is outstanding with the sectional shape of コ font from the both ends of the surface of described inner ring and described outer ring.
2. rolling bearing as claimed in claim 1, wherein,
Described sealed member has a plurality of cut zone of dividing in a circumferential direction by from the outstanding weir of internal face.
3. rolling bearing as claimed in claim 2, wherein,
Described sealed member has the continuum that is communicated with between the described cut zone of adjacency.
4. rolling bearing as claimed in claim 3, wherein,
Described continuum is positioned at the open end side of described sealed member.
5. rolling bearing as claimed in claim 1, wherein,
The specific volume resistance of described sealed member is 2 * 10
10More than the Ω cm.
6. rolling bearing as claimed in claim 1, wherein,
The material of described sealed member contains more than one the compound of selecting from the group of being made of polyacetal resin, polybutylene-terephthalate resin, polyphenylene sulfide, acrylic resin, polyamide resin, fluororesin, polyethylene resin, ABS resin.
7. rolling bearing as claimed in claim 1 is characterized in that:
Described lasso has chamfered section in the bight in the face of described sealed member,
Described chamfered section is covered by described isolation layer.
8. rolling bearing as claimed in claim 7, wherein,
Creepage distance by the definition of the axial length of the isolation layer on the bight that is positioned at described lasso is more than the 1mm.
9. rolling bearing as claimed in claim 1, wherein,
Described sealed member has protuberance in the end with described lasso butt,
Described lasso has the recess of admitting described protuberance.
10. rolling bearing, it possesses the outer ring; Inner ring; Be configured in the rolling element between described outer ring and the described inner ring; The guard ring that keeps described rolling element; And resinous sealed member, wherein,
The specific volume resistance of described sealed member is 2 * 10
10More than the Ω cm.
11. a rolling bearing, it possesses: the resin system sealed member that has the lasso of isolation layer and be held in described lasso is characterized in that:
Described lasso has chamfered section in the bight that regards to described sealed member,
Described chamfered section is covered by described isolation layer.
12. the main shaft supporting structure of a main motor for railway vehicle, it possesses the main shaft of described rolling bearing of claim 1 and main motor for railway vehicle,
Described main shaft is supported by described rolling bearing.
13. the main shaft supporting structure of a main motor for railway vehicle, it possesses the main shaft of described rolling bearing of claim 10 and main motor for railway vehicle,
Described main shaft is supported by described rolling bearing.
14. the main shaft supporting structure of a main motor for railway vehicle, it possesses the main shaft of described rolling bearing of claim 11 and main motor for railway vehicle,
Described main shaft is supported by described rolling bearing.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP268595/2005 | 2005-09-15 | ||
| JP2005268595A JP2007078115A (en) | 2005-09-15 | 2005-09-15 | Rolling bearing |
| JP2006028818A JP2007205555A (en) | 2006-02-06 | 2006-02-06 | Insulated bearing |
| JP2006028819A JP2007205556A (en) | 2006-02-06 | 2006-02-06 | Insulated bearing and spindle supporting structure of main motor for rolling stock |
| JP028819/2006 | 2006-02-06 | ||
| JP028818/2006 | 2006-02-06 | ||
| PCT/JP2006/317101 WO2007043249A1 (en) | 2005-09-15 | 2006-08-30 | Rolling bearing and main shaft supporting structure for main motor of railway vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101263312A true CN101263312A (en) | 2008-09-10 |
| CN101263312B CN101263312B (en) | 2011-02-16 |
Family
ID=37938651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800333713A Expired - Fee Related CN101263312B (en) | 2005-09-15 | 2006-08-30 | Rolling bearing and main shaft supporting structure for main motor of railway vehicle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007078115A (en) |
| CN (1) | CN101263312B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758873A (en) * | 2013-12-12 | 2014-04-30 | 洛阳轴研科技股份有限公司 | Grease lubrication sealing bearing |
| CN104343824A (en) * | 2013-08-08 | 2015-02-11 | 株式会社捷太格特 | Rolling bearing unit |
| CN105003543A (en) * | 2014-04-15 | 2015-10-28 | 株式会社捷太格特 | Rolling bearing device |
| CN105308341A (en) * | 2013-07-03 | 2016-02-03 | 斯凯孚公司 | Bearing assembly with lubrication cartridge |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009002474A (en) * | 2007-06-24 | 2009-01-08 | Yushin Precision Equipment Co Ltd | Direct acting guide mechanism |
| JP6390399B2 (en) * | 2014-12-11 | 2018-09-19 | 株式会社ジェイテクト | Rolling bearing device, method of manufacturing rolling bearing device, and jig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576550A (en) * | 1980-06-11 | 1982-01-13 | Toshiba Corp | Bearing device for rotary electric machine for vehicle |
| JP2779251B2 (en) * | 1990-03-26 | 1998-07-23 | エヌティエヌ株式会社 | Anti-corrosion rolling bearing |
| JPH06229425A (en) * | 1993-01-29 | 1994-08-16 | Nippon Seiko Kk | Electrocorrosion preventive rolling bearing |
| JP2001355639A (en) * | 2000-06-13 | 2001-12-26 | Nsk Ltd | Bearing device |
| JP2002181055A (en) * | 2000-12-14 | 2002-06-26 | Ntn Corp | Ceramics spray raceway ring and sealing treatment method |
| JP2003329045A (en) * | 2002-05-13 | 2003-11-19 | Nsk Ltd | Hybrid car drive motor and roller bearing therefor |
| JP2004144184A (en) * | 2002-10-24 | 2004-05-20 | Ntn Corp | Electrocorrosion preventive rolling bearing |
| JP2004346972A (en) * | 2003-05-20 | 2004-12-09 | Ntn Corp | Sealed bearing |
| JP2005172201A (en) * | 2003-12-15 | 2005-06-30 | Ntn Corp | Bearing with sealing |
-
2005
- 2005-09-15 JP JP2005268595A patent/JP2007078115A/en active Pending
-
2006
- 2006-08-30 CN CN2006800333713A patent/CN101263312B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308341A (en) * | 2013-07-03 | 2016-02-03 | 斯凯孚公司 | Bearing assembly with lubrication cartridge |
| CN105308341B (en) * | 2013-07-03 | 2019-04-23 | 斯凯孚公司 | Bearing assembly with lubricating box |
| CN104343824A (en) * | 2013-08-08 | 2015-02-11 | 株式会社捷太格特 | Rolling bearing unit |
| CN103758873A (en) * | 2013-12-12 | 2014-04-30 | 洛阳轴研科技股份有限公司 | Grease lubrication sealing bearing |
| CN105003543A (en) * | 2014-04-15 | 2015-10-28 | 株式会社捷太格特 | Rolling bearing device |
| CN105003543B (en) * | 2014-04-15 | 2019-03-15 | 株式会社捷太格特 | Rolling bearing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007078115A (en) | 2007-03-29 |
| CN101263312B (en) | 2011-02-16 |
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