JP6003188B2 - Railway vehicle bearing unit and press-fitting member extraction method - Google Patents

Railway vehicle bearing unit and press-fitting member extraction method Download PDF

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JP6003188B2
JP6003188B2 JP2012100686A JP2012100686A JP6003188B2 JP 6003188 B2 JP6003188 B2 JP 6003188B2 JP 2012100686 A JP2012100686 A JP 2012100686A JP 2012100686 A JP2012100686 A JP 2012100686A JP 6003188 B2 JP6003188 B2 JP 6003188B2
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press
fitting member
fitted
fitting
jig
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JP2013228046A (en
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隆良 伊藤
隆良 伊藤
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement

Description

本発明は、鉄道車両の車軸を回転自在に支持する鉄道車両用軸受ユニット及び圧入部材の引き抜き方法に関する。   The present invention relates to a railway vehicle bearing unit that rotatably supports an axle of a railway vehicle and a method for extracting a press-fitting member.

従来の軸受ユニットとしては、ハブ輪と、ハブ輪の小径段部に配置される軸受と、軸受が内周面に圧入されるナックルと、を備え、軸受の外輪の外周面に一対の環状溝が形成され、一対の環状溝の角部に面取りが形成されると共に、一対の環状溝に樹脂バンドが射出成形により充填されるものが知られている（例えば、特許文献１参照）。   A conventional bearing unit includes a hub ring, a bearing disposed at a small-diameter step portion of the hub ring, and a knuckle into which the bearing is press-fitted into the inner peripheral surface, and a pair of annular grooves on the outer peripheral surface of the outer ring of the bearing Is formed, and chamfers are formed at the corners of a pair of annular grooves, and a resin band is filled in the pair of annular grooves by injection molding (see, for example, Patent Document 1).

特開２００６−１１８６１１号公報JP 2006-118611 A

しかしながら、上記特許文献１に記載の軸受ユニットでは、軸受の圧入・引抜時において、ナックルの内周面が削り取られるのを防止することができるものの、圧入・引き抜きされる圧入部材である軸受の剛性・強度が考慮されておらず、例えば、圧入部材が薄肉である場合、圧入部材が変形・破損してしまう可能性があった。   However, in the bearing unit described in Patent Document 1, although the inner peripheral surface of the knuckle can be prevented from being scraped off when the bearing is press-fitted and pulled out, the rigidity of the bearing that is a press-fitting member that is press-fitted and pulled out can be prevented. -Strength is not considered, for example, when the press-fitting member is thin, the press-fitting member may be deformed or damaged.

本発明は、前述の事情に鑑みてなされたものであり、その目的は、薄肉の圧入部材であったとしても、圧入・引抜時の圧入部材の変形・破損を防止することができる鉄道車両用軸受ユニット及び圧入部材の引き抜き方法を提供することにある。   The present invention has been made in view of the above-described circumstances, and the purpose thereof is for railway vehicles that can prevent deformation / breakage of the press-fitting member at the time of press-fitting / pulling, even if it is a thin press-fitting member. The object is to provide a method for extracting a bearing unit and a press-fitting member.

本発明の上記目的は、下記の構成により達成される。
（１）鉄道車両の車輪が端部に取り付けられる車軸を回転自在に支持するため、外輪、内輪、外輪と内輪との間に転動自在に配置される複数の転動体を有する転がり軸受と、車軸に外嵌され、圧入部材が圧入される円筒形状の被圧入部材と、を備える鉄道車両用軸受ユニットにおいて、被圧入部材は、被圧入部材の外周面の一部分であり、圧入部材が圧入される座面と、軸方向で圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部でバックアップ面を形成する肩部と、を有し、肩部の外周面に、円周二等配又は円周四等配で軸方向視Ｄ字状の切欠部がバックアップ面と少なくとも周方向で隣接するように形成されることを特徴とする鉄道車両用軸受ユニット。
（２）鉄道車両の車輪が端部に取り付けられる車軸を回転自在に支持するため、外輪、内輪、外輪と内輪との間に転動自在に配置される複数の転動体を有する転がり軸受と、車軸に外嵌され、圧入部材が圧入される円筒形状の被圧入部材と、を備え、圧入部材を被圧入部材から引き抜く圧入部材の引き抜き方法であって、被圧入部材は、被圧入部材の外周面の一部分であり、圧入部材が圧入される座面と、軸方向で圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部でバックアップ面を形成する肩部と、を有し、肩部の外周面に、円周四等配で軸方向視Ｄ字状の切欠部がバックアップ面と少なくとも周方向で隣接するように形成されており、板状の治具を用意し、治具は、略コ字形状に形成されて、互いに平行配置される一対の側板部と、一対の側板部の基端部同士を連結する連結板部と、を有し、被圧入部材の切欠部に治具を挿入して、挿入した治具に対して引抜荷重をかけて圧入部材を被圧入部材から引き抜くことを特徴とする圧入部材の引き抜き方法。 The above object of the present invention can be achieved by the following constitution.
(1) Since the wheels of a rail vehicle for rotatably supporting the axle attached to the end portion, rolling with the outer ring, inner ring, a plurality of rolling elements which are rollably disposed between the outer ring and the inner ring In a railway vehicle bearing unit including a bearing and a cylindrical press-fitted member that is externally fitted to an axle, and the press-fitted member is press-fitted, the press-fitted member is a part of the outer peripheral surface of the press-fitted member , and the press-fitted member A seat surface into which the press-fitting member is pressed, a backup surface that determines the press-fitting position of the press-fitting member in the axial direction, and a shoulder portion that extends radially outward in the circumferential direction and forms a backup surface at one end in the axial direction. It is characterized in that the outer peripheral surface of the shoulder portion is formed so that a circumferentially equally spaced or circumferentially equally spaced D-shaped cutout is adjacent to the backup surface at least in the circumferential direction. Bearing unit for railway vehicles.
(2) Since the wheels of a rail vehicle for rotatably supporting the axle attached to the end portion, rolling with the outer ring, inner ring, a plurality of rolling elements which are rollably disposed between the outer ring and the inner ring and the bearing is fitted on the axle, and a pressed insertion cylindrical member press-fitting member is press, a withdrawal process of the press-fitting member pulling the press fit member from the press-fit member, the press-fit member is press-fitted is a portion of the outer peripheral surface of the member, and the seat surface pressed member is press-fitted, and a backup surface for determining the press-fitting position of the press member in the axial direction, extends radially outward over the circumferential direction, the axial direction end portion in has a shoulder that forms a backup surface, and the outer peripheral surface of the shoulder portion, the cutout portion in the axial direction as viewed D-shape is formed adjacent at least the circumferential direction with the backup surface a circle circumference four uniformly arranged and we are, prepared a plate-shaped jig, the jig is of formed substantially U-shaped Te has a pair of side plate portions which are parallel to each other, and a connecting plate portion connecting proximal ends of the pair of side plate portions, and by inserting a jig into the notch of the press-fitting member, inserted A method for extracting a press-fitting member, wherein a pull-out load is applied to a jig to pull out the press-fitting member from the press-fitted member.

本発明の鉄道車両用軸受ユニットによれば、被圧入部材は、被圧入部材の外周面の一部分であり、圧入部材が圧入される座面と、軸方向で圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部でバックアップ面を形成する肩部と、を有し、肩部の外周面に、円周二等配又は円周四等配で軸方向視Ｄ字状の切欠部がバックアップ面と少なくとも周方向で隣接するように形成されるため、圧入部材の圧入時は、バックアップ面により圧入部材の圧入位置が定まり、圧入荷重による圧入部材の変形・破損を防止することができる。また、圧入部材の引き抜き時は、切欠部に治具を挿入して、治具により圧入部材を引き抜くので、引抜荷重による圧入部材の変形・破損を防止することができる。従って、薄肉の圧入部材であったとしても、圧入・引抜時の圧入部材の変形・破損を防止することができる。 According to the railcar bearing unit of the present invention, the press-fit member is a part of the outer peripheral surface of the press-fit member , a seat surface into which the press-fit member is press-fitted , and a backup surface that determines the press-fit position of the press-fit member in the axial direction. And a shoulder portion that extends radially outward in the circumferential direction and forms a backup surface at one end in the axial direction. In the axial view, the D-shaped notch is formed so as to be adjacent to the backup surface at least in the circumferential direction. Therefore, when the press-fitting member is press-fitted, the press-fitting position of the press-fitting member is determined by the back-up surface, and the press-fitting member due to press-fitting load Can be prevented from being deformed or damaged. Further, when the press-fitting member is pulled out, a jig is inserted into the notch and the press-fitting member is pulled out by the jig, so that the press-fitting member can be prevented from being deformed or damaged due to a pulling load. Therefore, even if the press-fitting member is thin, deformation / breakage of the press-fitting member during press-fitting / pulling can be prevented.

また、本発明の圧入部材の引き抜き方法によれば、被圧入部材は、被圧入部材の外周面の一部分であり、圧入部材が圧入される座面と、軸方向で圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部でバックアップ面を形成する肩部と、を有し、肩部の外周面に、円周四等配で軸方向視Ｄ字状の切欠部がバックアップ面と少なくとも周方向で隣接するように形成されており、板状の治具を用意し、被圧入部材の切欠部に治具を挿入して、挿入した治具に対して引抜荷重をかけて圧入部材を被圧入部材から引き抜くため、圧入部材に対し適切に引抜荷重を加えることができ、引抜荷重による圧入部材の変形・破損を防止することができる。従って、薄肉の圧入部材であったとしても、圧入・引抜時の圧入部材の変形・破損を防止することができる。
また、本発明の圧入部材の引き抜き方法によれば、治具は、略コ字形状に形成されて、互いに平行配置される一対の側板部と、一対の側板部の基端部同士を連結する連結板部と、を有するため、円周四等配の切欠部のうちの３箇所に、治具の一対の側板部と連結板部を同時に挿入することができる。これにより、引抜荷重を三箇所に分散することができるので、引抜荷重による圧入部材の変形・破損を更に防止することができる。 Further, according to the method of pulling out the press-fitting member of the present invention, the press-fitting member is a part of the outer peripheral surface of the press-fitting member, and the press-fitting position of the press-fitting member is determined in the axial direction and the seat surface into which the press-fitting member is press-fitted. and backup surface, extending radially outward over the circumferential direction, has a shoulder which forms a backup surface at one axial end, and the outer peripheral surface of the shoulder portion, axially circle circumference four uniformly arranged The D-shaped cut-out portion is formed so as to be adjacent to the backup surface at least in the circumferential direction . A plate-shaped jig is prepared, and the jig is inserted into the cut-out portion of the press-fit member. Since the press-fitting member is pulled out of the press-fitted member by applying a pull-out load to the tool, the pull-out load can be appropriately applied to the press-fitting member, and deformation and breakage of the press-fitting member due to the pull-out load can be prevented. Therefore, even if the press-fitting member is thin, deformation / breakage of the press-fitting member during press-fitting / pulling can be prevented.
Further, according to the method for pulling out the press-fitting member of the present invention, the jig is formed in a substantially U shape and connects the pair of side plate portions arranged in parallel to each other and the base end portions of the pair of side plate portions. Therefore, the pair of side plate portions and the connecting plate portion of the jig can be simultaneously inserted into three of the circumferentially equidistant cutout portions. As a result, the pull-out load can be distributed to three locations, so that the deformation and breakage of the press-fitting member due to the pull-out load can be further prevented.

本発明に係る鉄道車両用軸受ユニットの一実施形態を説明するための断面図である。It is sectional drawing for demonstrating one Embodiment of the bearing unit for rail vehicles which concerns on this invention. 図１に示す後蓋の周辺を説明する拡大断面図である。It is an expanded sectional view explaining the periphery of the back cover shown in FIG. 図１に示す後蓋の斜視図である。It is a perspective view of the back cover shown in FIG. 図１に示す後蓋の正面図である。It is a front view of the rear cover shown in FIG. 図４のＡ−Ａ線断面図であって、シール装置の第２スリンガが取り付けられた状態の断面図である。It is AA sectional view taken on the line of FIG. 4, Comprising: It is sectional drawing of the state in which the 2nd slinger of the sealing apparatus was attached. 図４のＢ−Ｂ線断面図であって、シール装置の第２スリンガが取り付けられた状態の断面図である。FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4, and is a cross-sectional view in a state where a second slinger of the sealing device is attached. 後蓋から第２スリンガを引き抜く治具の斜視図である。It is a perspective view of the jig | tool which pulls out the 2nd slinger from a back cover. 後蓋から第２スリンガを引き抜く際に後蓋の切欠部に治具が挿入された状態を説明する断面図である。It is sectional drawing explaining the state by which the jig | tool was inserted in the notch part of a back cover, when pulling out the 2nd slinger from a back cover.

以下、本発明に係る鉄道車両用軸受ユニットの一実施形態について、図面に基づいて詳細に説明する。   Hereinafter, an embodiment of a railway vehicle bearing unit according to the present invention will be described in detail with reference to the drawings.

本実施形態の鉄道車両用軸受ユニット１０は、図１に示すように、複列円すいころ軸受（転がり軸受）２０を備え、この軸受２０により鉄道車両の車軸５０が回転自在に支持されている。また、車軸５０の外端部（図１の右端部）には、鉄道車両の不図示の車輪が取り付けられている。そして、軸受２０は、一体型の外輪２１と、各列に個別に分割された２つの内輪２２，２２と、を備え、外輪２１と内輪２２，２２との間には、保持器２４に保持される複数の円すいころ（転動体）２３が転動自在に配置されている。また、２つの内輪２２，２２は、互いに対向する端面同士が環状の間座２５に当接した状態で車軸５０に外嵌されている。また、車軸５０には、車輪から離間する側の内輪２２の軸方向外端面と当接する円筒形状の前蓋２６、及び車輪側の内輪２２の軸方向外端面と当接する円筒形状の後蓋（被圧入部材）３０が外嵌されている。   As shown in FIG. 1, the railway vehicle bearing unit 10 of the present embodiment includes a double-row tapered roller bearing (rolling bearing) 20, and an axle 50 of the railway vehicle is rotatably supported by the bearing 20. A wheel (not shown) of the railway vehicle is attached to the outer end portion (the right end portion in FIG. 1) of the axle 50. The bearing 20 includes an integrated outer ring 21 and two inner rings 22 and 22 that are individually divided into rows, and is held by a cage 24 between the outer ring 21 and the inner rings 22 and 22. A plurality of tapered rollers (rolling elements) 23 to be rolled are arranged. The two inner races 22 and 22 are externally fitted to the axle 50 with their end faces facing each other in contact with the annular spacer 25. Further, the axle 50 includes a cylindrical front lid 26 that comes into contact with the outer end surface in the axial direction of the inner ring 22 on the side away from the wheel, and a cylindrical rear lid that comes into contact with the outer end surface in the axial direction of the inner ring 22 on the wheel side. A press-fit member 30 is externally fitted.

車軸５０は、内輪２２，２２が外嵌される車軸ジャーナル部５１と、車軸ジャーナル部５１よりも大径であると共に、車軸ジャーナル部５１より車輪側（軸方向外方）に位置する車軸大径部５２と、を有する。そして、前蓋２６は車軸５０の車軸ジャーナル部５１に外嵌され、後蓋３０は車軸５０の車軸大径部５２に外嵌されている。   The axle 50 has an axle journal portion 51 to which the inner rings 22 and 22 are fitted and a larger diameter than the axle journal portion 51, and an axle large diameter located on the wheel side (axially outward) from the axle journal portion 51. Part 52. The front lid 26 is externally fitted to the axle journal portion 51 of the axle 50, and the rear lid 30 is externally fitted to the axle large diameter portion 52 of the axle 50.

また、図２〜図５に示すように、後蓋３０の内輪２２と当接する軸方向端部の外周面には、環状段部３１が形成されている。また、後蓋３０には、環状段部３１の軸方向外方に隣接した位置に、後述するシール装置４０の第２スリンガ（圧入部材）４２が圧入される座面３２が形成されている。また、後蓋３０には、座面３２の軸方向外方に隣接した位置に、後述する第２スリンガ４２の圧入位置を決めるバックアップ面３３、及びバックアップ面３３を形成する肩部３４が形成されている。   As shown in FIGS. 2 to 5, an annular step portion 31 is formed on the outer peripheral surface of the axial end that contacts the inner ring 22 of the rear lid 30. The rear cover 30 is formed with a seat surface 32 into which a second slinger (press-fitting member) 42 of a sealing device 40 described later is press-fitted at a position adjacent to the outer side in the axial direction of the annular step portion 31. Further, the back cover 30 is formed with a back-up surface 33 for determining a press-fitting position of a second slinger 42, which will be described later, and a shoulder 34 for forming the back-up surface 33 at a position adjacent to the outside of the seat surface 32 in the axial direction. ing.

そして、本実施形態では、図３〜図６に示すように、後蓋３０の肩部３４の外周面に、円周四等配でＤ字状の切欠部３５が形成されている。また、図４に示すように、円周四等配の切欠部３５の底面３５ａは、それぞれの延長線が互いに直交するように形成されている。また、図６に示すように、切欠部３５は、その底面３５ａが後述する第２スリンガ４２のフランジ部４２ｂの径方向内端部に達する深さに形成されている。また、切欠部３５は、座面３２に対してバックアップ面３３より軸方向に離れた軸方向側面を形成し、後述する第２スリンガ４２のフランジ部４２ｂとの間に隙間を形成する。   And in this embodiment, as shown in FIGS. 3-6, the D-shaped notch part 35 is formed in the outer peripheral surface of the shoulder part 34 of the back cover 30 by the circumference four equal distribution. Also, as shown in FIG. 4, the bottom surface 35a of the circumferentially equidistant cutout portion 35 is formed so that the respective extension lines are orthogonal to each other. Moreover, as shown in FIG. 6, the notch part 35 is formed in the depth which the bottom face 35a reaches the radial direction inner end part of the flange part 42b of the 2nd slinger 42 mentioned later. The notch 35 forms an axial side surface that is axially separated from the backup surface 33 with respect to the seat surface 32, and forms a gap with a flange portion 42b of the second slinger 42 described later.

また、図１に示すように、前蓋２６及び後蓋３０の軸受２０寄りの外周側には、段付き円筒状のシールケース２７がそれぞれ設けられており、このシールケース２７は、外輪２１の軸方向端部の内周面に嵌合されている。   Further, as shown in FIG. 1, a stepped cylindrical seal case 27 is provided on the outer peripheral side of the front lid 26 and the rear lid 30 near the bearing 20. It is fitted to the inner peripheral surface of the end portion in the axial direction.

そして、シールケース２７，２７と前蓋２６及び後蓋３０との間には、シール装置４０がそれぞれ取り付けられている。これにより、軸受ユニット１０の内部空間への異物の浸入や、内部空間からの潤滑剤の漏出が防止されている。なお、以下の説明では、図２を参照にして後蓋３０側のシール装置４０について説明するが、前蓋２６側のシール装置４０も同様の構成である。   A seal device 40 is attached between the seal cases 27, 27 and the front lid 26 and the rear lid 30. As a result, entry of foreign matter into the internal space of the bearing unit 10 and leakage of the lubricant from the internal space are prevented. In the following description, the sealing device 40 on the rear lid 30 side will be described with reference to FIG. 2, but the sealing device 40 on the front lid 26 side has the same configuration.

シール装置４０は、図２に示すように、シールケース２７の内周面に固定される第１スリンガ４１と、後蓋３０の座面３２に固定される第２スリンガ４２と、第１スリンガ４１の内周面に固定され、第２スリンガ４２に接触するシール部材４３と、を備える。   As shown in FIG. 2, the sealing device 40 includes a first slinger 41 that is fixed to the inner peripheral surface of the seal case 27, a second slinger 42 that is fixed to the seat surface 32 of the rear lid 30, and a first slinger 41. And a seal member 43 that is fixed to the inner peripheral surface and contacts the second slinger 42.

第２スリンガ４２は、図５に示すように、薄肉の金属板を折り曲げることにより形成されており、後蓋３０の座面３２に圧入固定されている。この第２スリンガ４２は、後蓋３０の座面３２に圧入される第１円筒部４２ａと、第１円筒部４２ａの車輪側端部から径方向外方に延びるフランジ部４２ｂと、フランジ部４２ｂの径方向外端部から内輪２２側に延びる第２円筒部４２ｃと、を有する。   As shown in FIG. 5, the second slinger 42 is formed by bending a thin metal plate, and is press-fitted and fixed to the seat surface 32 of the rear lid 30. The second slinger 42 includes a first cylindrical portion 42a that is press-fitted into the seating surface 32 of the rear lid 30, a flange portion 42b that extends radially outward from the wheel side end of the first cylindrical portion 42a, and a flange portion 42b. And a second cylindrical portion 42c extending from the radially outer end to the inner ring 22 side.

このように構成される軸受ユニット１０では、第２スリンガ４２を後蓋３０に圧入する際は、図５に示すように、不図示の治具により第２スリンガ４２の第１円筒部４２ａが後蓋３０の座面３２に圧入され、第２スリンガ４２のフランジ部４２ｂが後蓋３０の肩部３４のバックアップ面３３に当接して、第２スリンガ４２の圧入位置が規定される。   In the bearing unit 10 configured as described above, when the second slinger 42 is press-fitted into the rear lid 30, as shown in FIG. 5, the first cylindrical portion 42a of the second slinger 42 is moved rearward by a jig (not shown). The flange portion 42b of the second slinger 42 is brought into contact with the backup surface 33 of the shoulder portion 34 of the rear lid 30 so that the press-fitting position of the second slinger 42 is defined.

また、第２スリンガ４２を後蓋３０から引き抜く際は、図７に示す治具６０を後蓋３０の切欠部３５に挿入し、治具６０に対して圧入方向とは逆の方向の引抜荷重（図８の矢印参照）をかけることによって、第２スリンガ４２が後蓋３０から引き抜かれる。   When the second slinger 42 is pulled out from the rear lid 30, the jig 60 shown in FIG. 7 is inserted into the notch 35 of the rear lid 30, and the pulling load in the direction opposite to the press-fitting direction with respect to the jig 60. By applying (see the arrow in FIG. 8), the second slinger 42 is pulled out from the rear lid 30.

治具６０は、図７に示すように、略コ字形状に形成されており、互いに平行配置される一対の側板部６１，６１と、一対の側板部６１，６１の基端部同士を連結する連結板部６２と、を有する。このため、治具６０を後蓋３０の切欠部３５に挿入した際には、円周四等配の切欠部３５のうちの３箇所に、治具６０の一対の側板部６１，６１と連結板部６２が同時に挿入される。   As shown in FIG. 7, the jig 60 is formed in a substantially U shape, and connects a pair of side plate portions 61 and 61 arranged in parallel with each other and base ends of the pair of side plate portions 61 and 61. And a connecting plate portion 62. For this reason, when the jig 60 is inserted into the notch 35 of the rear lid 30, it is connected to the pair of side plate parts 61, 61 of the jig 60 at three of the four equally spaced notches 35. The plate part 62 is inserted simultaneously.

以上説明したように、本実施形態の鉄道車両用軸受ユニット１０によれば、後蓋３０が、第２スリンガ４２が圧入される座面３２と、第２スリンガ４２の圧入位置を決めるバックアップ面３３と、バックアップ面３３を形成する肩部３４と、を有し、肩部３４の外周面に、円周四等配でＤ字状の切欠部３５が形成されるため、第２スリンガ４２の圧入時は、バックアップ面３３により第２スリンガ４２の圧入位置が定まり、圧入荷重による第２スリンガ４２の変形・破損を防止することができる。また、第２スリンガ４２の引き抜き時は、切欠部３５に治具６０を挿入して、治具６０により第２スリンガ４２を引き抜くので、引抜荷重による第２スリンガ４２の変形・破損を防止することができる。従って、薄肉の第２スリンガ４２であったとしても、圧入・引抜時の第２スリンガ４２の変形・破損を防止することができる。   As described above, according to the railway vehicle bearing unit 10 of the present embodiment, the rear cover 30 includes the seat surface 32 into which the second slinger 42 is press-fitted and the backup surface 33 that determines the press-fitting position of the second slinger 42. And a shoulder 34 that forms the backup surface 33, and a D-shaped cutout 35 is formed on the outer circumferential surface of the shoulder 34 with a four-way circumference, so that the second slinger 42 is press-fitted At this time, the press-fitting position of the second slinger 42 is determined by the back-up surface 33, and deformation / breakage of the second slinger 42 due to the press-fitting load can be prevented. Further, when the second slinger 42 is pulled out, the jig 60 is inserted into the notch 35 and the second slinger 42 is pulled out by the jig 60, so that deformation and breakage of the second slinger 42 due to the pulling load can be prevented. Can do. Therefore, even if it is the thin 2nd slinger 42, the deformation | transformation and damage of the 2nd slinger 42 at the time of press fit and extraction can be prevented.

また、本実施形態の圧入部材の引き抜き方法によれば、板状の治具６０を用意し、後蓋３０の切欠部３５に治具６０を挿入して、挿入した治具６０に対して引抜荷重をかけて第２スリンガ４２を後蓋３０から引き抜くため、第２スリンガ４２に対し適切に引抜荷重を加えることができ、引抜荷重による第２スリンガ４２の変形・破損を防止することができる。従って、薄肉の第２スリンガ４２であったとしても、圧入・引抜時の第２スリンガ４２の変形・破損を防止することができる。   Further, according to the method of pulling out the press-fitting member of the present embodiment, a plate-shaped jig 60 is prepared, the jig 60 is inserted into the notch 35 of the rear lid 30, and the inserted jig 60 is pulled out. Since the second slinger 42 is pulled out from the rear lid 30 under a load, it is possible to appropriately apply a pulling load to the second slinger 42 and to prevent the second slinger 42 from being deformed or damaged by the pulling load. Therefore, even if it is the thin 2nd slinger 42, the deformation | transformation and damage of the 2nd slinger 42 at the time of press fit and extraction can be prevented.

また、本実施形態の圧入部材の引き抜き方法によれば、後蓋３０の切欠部３５は、円周四等配で形成されており、治具６０は、略コ字形状に形成されて、互いに平行配置される一対の側板部６１，６１と、一対の側板部６１，６１の基端部同士を連結する連結板部６２と、を有するため、円周四等配の切欠部３５のうちの３箇所に、治具６０の一対の側板部６１，６１と連結板部６２を同時に挿入することができる。これにより、引抜荷重を三箇所に分散することができるので、引抜荷重による第２スリンガ４２の変形・破損を更に防止することができる。   Further, according to the method of pulling out the press-fitting member of the present embodiment, the cutout portions 35 of the rear lid 30 are formed in a uniform quadrangular circumference, and the jig 60 is formed in a substantially U shape, Since it has a pair of side plate portions 61 and 61 arranged in parallel and a connecting plate portion 62 that connects the base end portions of the pair of side plate portions 61 and 61, A pair of side plate portions 61 and 61 and a connecting plate portion 62 of the jig 60 can be simultaneously inserted into three places. Thereby, since the drawing load can be distributed to three places, the deformation / breakage of the second slinger 42 due to the drawing load can be further prevented.

なお、本発明は上記実施形態に例示したものに限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記実施形態では、後蓋３０の切欠部３５は、円周四等配で形成されているが、これに限定されず、円周二等配で形成されていてもよい。
また、上記本実施形態では、後蓋３０に切欠部３５が形成される場合を例示したが、これに限定されず、前蓋２６に切欠部３５が形成されていてもよく、また、前蓋２６及び後蓋３０の両方に切欠部３５が形成されていてもよい。
また、上記実施形態では、本発明を鉄道車両用軸受ユニットに適用した場合を例示したが、これに限定されず、圧入関係にある部材同士であれば本発明を適用してもよい。 In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above-described embodiment, the cutout portions 35 of the rear lid 30 are formed in a quadrangular circumference, but the present invention is not limited to this, and may be formed in a two-circumferential circumference.
Moreover, although the case where the notch part 35 was formed in the back cover 30 was illustrated in the said embodiment, it is not limited to this, The notch part 35 may be formed in the front cover 26, and the front cover A cutout 35 may be formed on both the rear cover 30 and the rear cover 30.
Moreover, although the case where this invention was applied to the railway vehicle bearing unit was illustrated in the said embodiment, it is not limited to this, You may apply this invention as long as it is members in press-fit relationship.

１０ 鉄道車両用軸受ユニット
２０ 複列円すいころ軸受（転がり軸受）
２１ 外輪
２２ 内輪
２３ 円すいころ（転動体）
２６ 前蓋（被圧入部材）
３０ 後蓋（被圧入部材）
３２ 座面
３３ バックアップ面
３４ 肩部
３５ 切欠部
４０ シール装置
４１ 第１スリンガ
４２ 第２スリンガ（圧入部材）
４３ シール部材
５０ 車軸
６０ 治具
６１ 側板部
６２ 連結板部 10 Bearing units for railway vehicles 20 Double-row tapered roller bearings (rolling bearings)
21 Outer ring 22 Inner ring 23 Tapered roller (rolling element)
26 Front cover (press-fit member)
30 Rear lid (press-fit member)
32 Seat surface 33 Backup surface 34 Shoulder portion 35 Notch portion 40 Sealing device 41 First slinger 42 Second slinger (press-fit member)
43 Seal member 50 Axle 60 Jig 61 Side plate portion 62 Connection plate portion

Claims (2)

鉄道車両の車輪が端部に取り付けられる車軸を回転自在に支持するため、外輪、内輪、及び前記外輪と前記内輪との間に転動自在に配置される複数の転動体を有する転がり軸受と、
前記車軸に外嵌され、圧入部材が圧入される円筒形状の被圧入部材と、を備える鉄道車両用軸受ユニットにおいて、
前記被圧入部材は、前記被圧入部材の外周面の一部分であり、前記圧入部材が圧入される座面と、軸方向で前記圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部で前記バックアップ面を形成する肩部と、を有し、
前記肩部の外周面に、円周二等配又は円周四等配で軸方向視Ｄ字状の切欠部が前記バックアップ面と少なくとも周方向で隣接するように形成されることを特徴とする鉄道車両用軸受ユニット。 Since the wheels of a rail vehicle for rotatably supporting the axle attached to the end portion, rolling with the outer ring, inner ring, and a plurality of rolling bodies rolling it is rotatably disposed between the outer ring and the inner ring A bearing,
In a rolling stock bearing unit comprising a cylindrical press-fit member that is externally fitted to the axle and a press-fit member is press-fitted,
The press-fitting member is a part of the outer peripheral surface of the press-fitting member, a seat surface into which the press-fitting member is press-fitted, a backup surface that determines the press-fitting position of the press-fitting member in the axial direction, and a diameter across the circumferential direction. A shoulder portion extending outward in the direction and forming the backup surface at one axial end portion ;
A rail having a circumferentially equal or circumferentially equal D-shaped notch in the axial direction is formed on the outer peripheral surface of the shoulder so as to be adjacent to the backup surface at least in the circumferential direction. Bearing unit for vehicles. 鉄道車両の車輪が端部に取り付けられる車軸を回転自在に支持するため、外輪、内輪、及び前記外輪と前記内輪との間に転動自在に配置される複数の転動体を有する転がり軸受と、
前記車軸に外嵌され、圧入部材が圧入される円筒形状の被圧入部材と、を備え、
前記圧入部材を前記被圧入部材から引き抜く圧入部材の引き抜き方法であって、
前記被圧入部材は、前記被圧入部材の外周面の一部分であり、前記圧入部材が圧入される座面と、軸方向で前記圧入部材の圧入位置を決めるバックアップ面と、周方向に渡って径方向外方に延出し、軸方向一端部で前記バックアップ面を形成する肩部と、を有し、前記肩部の外周面に、円周四等配で軸方向視Ｄ字状の切欠部が前記バックアップ面と少なくとも周方向で隣接するように形成されており、
板状の治具を用意し、
前記治具は、略コ字形状に形成されて、互いに平行配置される一対の側板部と、前記一対の側板部の基端部同士を連結する連結板部と、を有し、
前記被圧入部材の前記切欠部に前記治具を挿入して、挿入した前記治具に対して引抜荷重をかけて前記圧入部材を前記被圧入部材から引き抜くことを特徴とする圧入部材の引き抜き方法。 Since the wheels of a rail vehicle for rotatably supporting the axle attached to the end portion, rolling with the outer ring, inner ring, and a plurality of rolling bodies rolling it is rotatably disposed between the outer ring and the inner ring A bearing,
A cylindrical press-fit member that is externally fitted to the axle and into which the press-fit member is press-fitted,
A method for pulling out the press-fitting member to pull out the press-fitting member from the press-fitted member,
The press-fitting member is a part of the outer peripheral surface of the press-fitting member, a seat surface into which the press-fitting member is press-fitted, a backup surface that determines the press-fitting position of the press-fitting member in the axial direction, and a diameter across the circumferential direction. extending outwardly has a shoulder forming the backup surface at one axial end, and an outer peripheral surface of the shoulder portion, the cutout portion in the axial direction as viewed D-shape with a circle circumference four uniformly arranged It is formed to be adjacent to the backup surface at least in the circumferential direction ,
Prepare a plate-shaped jig,
The jig is formed in a substantially U shape and has a pair of side plate portions arranged in parallel to each other, and a connecting plate portion for connecting the base end portions of the pair of side plate portions,
A method of pulling out a press-fitting member, wherein the jig is inserted into the cut-out portion of the press-fitted member, a pulling load is applied to the inserted jig, and the press-fitting member is pulled out from the press-fitted member. .
JP2012100686A 2012-04-26 2012-04-26 Railway vehicle bearing unit and press-fitting member extraction method Expired - Fee Related JP6003188B2 (en)

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