JP2010100196A - Bearing apparatus for railroad vehicle axle - Google Patents

Bearing apparatus for railroad vehicle axle Download PDF

Info

Publication number
JP2010100196A
JP2010100196A JP2008274300A JP2008274300A JP2010100196A JP 2010100196 A JP2010100196 A JP 2010100196A JP 2008274300 A JP2008274300 A JP 2008274300A JP 2008274300 A JP2008274300 A JP 2008274300A JP 2010100196 A JP2010100196 A JP 2010100196A
Authority
JP
Japan
Prior art keywords
outer ring
peripheral surface
air vent
mandrel
stepped hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2008274300A
Other languages
Japanese (ja)
Other versions
JP5160374B2 (en
Inventor
Takashi Kishida
尚 岸田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2008274300A priority Critical patent/JP5160374B2/en
Publication of JP2010100196A publication Critical patent/JP2010100196A/en
Application granted granted Critical
Publication of JP5160374B2 publication Critical patent/JP5160374B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/726—Sealings with means to vent the interior of the bearing
    • 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
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent sealing performance from being adversely affected even though a vent hole deforms in a vent structure of a bearing apparatus for a railroad vehicle. <P>SOLUTION: The bearing apparatus for the railroad vehicle includes: a multiple-row rolling bearing comprising an outer ring 2, a pair of inner rings, and two rows of rolling elements; sealing devices attached to openings at both ends of the outer ring 2; and an air releasing plug 40A inserted in a stepped hole 30 passing through the outer ring 2 from its outer circumferential surface to its inner circumferential surface and having an annular bottom surface 34 in the middle thereof. The air releasing plug 40A comprises a body 42 and a hollow tapered plug 48 mutually connected with a taper thread. The body 42 has an outer diameter insertable into a major-diameter hole 32 of the stepped hole 30, and is provided with a core 46 on the inner periphery. An internal taper thread is formed on an inner circumferential surface of the core 46. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は複列転がり軸受を使用した鉄道車両車軸用軸受装置に関し、より詳しくは鉄道車両車軸用軸受装置のベント（空気抜き）構造に関する。   The present invention relates to a railway vehicle axle bearing device using a double-row rolling bearing, and more particularly to a vent (air venting) structure of a railway vehicle axle bearing device.

図６は、複列円すいころ軸受を使用した鉄道車両車軸用軸受の例であって、車軸１０の端部に複列円すいころ軸受を取り付け、その両側に油切り１２と後ぶた１４を配置することによって位置決めしてある。複列円すいころ軸受は、外輪２と、一対の内輪４と、複列の円すいころ６と、各列の円すいころ６を円周方向で所定間隔に保持する保持器８とからなり、外輪２は図示しない軸箱に固定し、内輪４は車軸１０とはめあわせる。油切り１２に前ぶた（図示せず）を当てて、車軸１０の端部に形成したおねじ部に図示しないナットを締め込むことにより、油切り１２と内輪４を介して後ぶた１４を車軸１０の肩部１６に押し付けて、複列円すいころ軸受を車軸１０上に固定する。外輪２の両端開口部にはシール装置１８が装着してある。   FIG. 6 shows an example of a railway vehicle axle bearing using a double-row tapered roller bearing. A double-row tapered roller bearing is attached to the end of the axle 10, and an oil drain 12 and a rear lid 14 are arranged on both sides thereof. It is positioned by. The double-row tapered roller bearing includes an outer ring 2, a pair of inner rings 4, a double-row tapered roller 6, and a cage 8 that holds the tapered rollers 6 in each row at a predetermined interval in the circumferential direction. Is fixed to a shaft box (not shown), and the inner ring 4 is fitted to the axle 10. The front lid (not shown) is applied to the oil drain 12 and a nut (not shown) is fastened to the external thread formed at the end of the axle 10 so that the rear lid 14 is connected to the axle 14 via the oil drain 12 and the inner ring 4. The double row tapered roller bearing is fixed onto the axle 10 by pressing against the shoulder 16 of the ten. Sealing devices 18 are attached to both end openings of the outer ring 2.

この鉄道車両車軸軸受装置では、シール装置１８で外輪２と内輪４との間の軸受空間が密封されているため、軸受の回転に伴って発生する摩擦熱により、軸受空間内の空気が膨張して内圧が高まると、シール装置１８に内圧が作用し、シールリップ圧が大きくなり、シールトルクが増加し、発熱が大となる。このため、空気抜き栓（ベントプラグ）２０を設けて内圧を調整するようにしている。   In this railway vehicle axle bearing device, since the bearing space between the outer ring 2 and the inner ring 4 is sealed by the sealing device 18, the air in the bearing space expands due to frictional heat generated as the bearing rotates. When the internal pressure increases, the internal pressure acts on the sealing device 18, the seal lip pressure increases, the seal torque increases, and heat generation increases. For this reason, an air vent plug (vent plug) 20 is provided to adjust the internal pressure.

空気抜き栓２０は、図７に示すように、金属製の心金２２にキャップ状のゴム部材２４を被せ、ゴム部材２４の頂部にスリット２６を形成したものである。スリット２６は、常時はゴム部材２４の弾力で閉じられていて、外輪２と内輪４との間の空間が所定値以上の内圧になった時に、ゴム部材２４の弾力に抗してスリット２６が自然に開かれて、上記空間の空気が排出される。   As shown in FIG. 7, the air vent plug 20 is formed by covering a metal mandrel 22 with a cap-shaped rubber member 24 and forming a slit 26 on the top of the rubber member 24. The slit 26 is normally closed by the elasticity of the rubber member 24, and the slit 26 resists the elasticity of the rubber member 24 when the space between the outer ring 2 and the inner ring 4 becomes an internal pressure of a predetermined value or more. It opens naturally and the air in the space is exhausted.

従来のベント構造は、空気抜き栓２０の外径と空気抜き穴の内径をタイトなはめあいとして密封し、空気抜き栓２０のスリット２６の開閉によって内圧を調整するようにしていた。
また、特許文献１では、後ぶた１４に、軸受空間から後ぶた１４の外周面に通じる空気抜き穴（ベントホール）を設け、この空気抜き穴に空気抜き栓２０を取り付けることが提案されている。
実開平４−１２３８７１号公報 In the conventional vent structure, the outer diameter of the air vent plug 20 and the inner diameter of the air vent hole are sealed as a tight fit, and the internal pressure is adjusted by opening and closing the slit 26 of the air vent plug 20.
Further, Patent Document 1 proposes that an air vent hole (vent hole) leading from the bearing space to the outer peripheral surface of the rear lid 14 is provided in the rear lid 14 and an air vent plug 20 is attached to the air vent hole.
Japanese Utility Model Publication No. 4-123871

鉄道車両車軸用軸受の内圧を調整する空気抜き栓を装着するための空気抜き穴は熱処理変形が生じやすくいため、空気抜き穴に空気抜き栓を装着しただけでは十分な密封性が得られない場合がある。したがって、そのようなことがないように、熱処理前のリーマ加工等で狙い値を厳しく管理している。その結果、鉄道車両車軸用軸受の製造工数が増え、コスト面でも問題となる。   Since the air vent hole for mounting the air vent plug for adjusting the internal pressure of the railcar axle bearing is likely to undergo heat treatment deformation, sufficient sealing performance may not be obtained only by mounting the air vent plug in the air vent hole. Therefore, in order to prevent such a situation, the target value is strictly controlled by reamer processing before heat treatment. As a result, the man-hours for manufacturing the bearings for railcar axles are increased, which causes a problem in terms of cost.

この発明の目的は、鉄道車両車軸用軸受装置のベント構造において、空気抜き穴が変形していても密封性に悪影響を及ぼさないようにすることにある。   SUMMARY OF THE INVENTION An object of the present invention is to prevent an adverse effect on the sealing performance even if the air vent hole is deformed in a vent structure of a railway vehicle axle bearing device.

この発明の鉄道車両車軸用軸受装置は、外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、前記空気抜き栓は、テーパねじで互いに結合した本体と中空のテーパプラグとで構成され、前記本体は前記段付き孔の大径孔に挿入し得る外径を有し、かつ、内周に心金を設けるとともに前記心金の内周面にテーパめねじを形成してあることを特徴とするものである。   A railcar axle bearing device according to the present invention includes a double-row rolling bearing having an outer ring, a pair of inner rings, and two rows of rolling elements, a seal device mounted at both end openings of the outer ring, and an inner surface from an outer peripheral surface of the outer ring. An air vent plug inserted into a stepped hole having an annular bottom surface in the middle and penetrating to the peripheral surface, the air vent plug is composed of a main body and a hollow taper plug connected to each other with a taper screw, It has an outer diameter that can be inserted into the large-diameter hole of the stepped hole, is provided with a mandrel on the inner periphery, and is formed with a tapered female screw on the inner peripheral surface of the mandrel. is there.

前記本体は、弾性体で成形して、頂部にスリットが形成してある（請求項２）。本体を構成する弾性体は、心金の下端面まで覆っているのが望ましい。本体の下端面を構成する弾性体が段付き孔の底面に密着してここでもシール作用を発揮するからである。   The main body is formed of an elastic body, and a slit is formed at the top (Claim 2). It is desirable that the elastic body constituting the main body covers the lower end surface of the mandrel. This is because the elastic body constituting the lower end surface of the main body is brought into close contact with the bottom surface of the stepped hole and also exhibits a sealing action.

前記テーパプラグは中空型六角穴付きテーパねじの形態で（請求項３）、前記外輪の内周面側から六角レンチを挿入して前記テーパプラグを回すことにより空気抜き栓の外径を調整し、段付き孔の内周面と空気抜き栓の外周面のはめあい（締め代）を調整することができる。   The taper plug is in the form of a hollow hexagon socket taper screw (Claim 3), and an outer diameter of the air vent plug is adjusted by inserting a hexagon wrench from the inner peripheral surface side of the outer ring and turning the taper plug. The fit (tightening allowance) between the inner peripheral surface of the stepped hole and the outer peripheral surface of the air vent plug can be adjusted.

請求項４の発明は、外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、前記空気抜き栓は、弾性体で成形して、頂部にスリットが形成してあり、前記段付き孔の大径孔を前記外輪の半径方向外側に向かって小径となったテーパ形状とした鉄道車両車軸用軸受装置である。   According to a fourth aspect of the present invention, there is provided a double row rolling bearing having an outer ring, a pair of inner rings, and two rows of rolling elements, a seal device attached to both end openings of the outer ring, and a through-hole from the outer peripheral surface to the inner peripheral surface of the outer ring And an air vent plug inserted into a stepped hole having an annular bottom surface in the middle, the air vent plug is formed of an elastic body, and a slit is formed at the top, and the large diameter hole of the stepped hole is formed. It is a railway vehicle axle bearing device having a tapered shape with a smaller diameter toward the outer side in the radial direction of the outer ring.

前記空気抜き栓は、前記段付き孔の大径孔に挿入し得る外径を有し、かつ、内周に心金を設けるとともに前記心金の内周面にテーパめねじを形成し、前記テーパめねじに中空のテーパプラグを装着したものとすることができる（請求項５）。   The air vent plug has an outer diameter that can be inserted into the large-diameter hole of the stepped hole, and a mandrel is provided on the inner periphery, and a tapered female screw is formed on the inner peripheral surface of the mandrel, and the taper A hollow taper plug may be attached to the female thread (claim 5).

請求項６の発明は、外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、前記空気抜き栓は、前記段付き孔の大径孔に挿入する、内周に心金をもった弾性体リングと、前記心金の内側に装着するベント本体とを有し、前記ベント本体は、弾性体で成形して、頂部にスリットが形成してある、鉄道車両車軸用軸受装置である。
空気抜き栓を、段付き孔に直接装着する弾性体リングと、その弾性体リングに装着するベント本体とに分けたことにより、段付き孔に熱処理変形があっても弾性体リングによって吸収され、密封性に対する悪影響を少なくすることができる。 According to a sixth aspect of the present invention, there is provided a double row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device attached to both end openings of the outer ring, and penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. An air vent plug inserted into a stepped hole having an annular bottom surface in the middle, and the air vent plug is inserted into a large diameter hole of the stepped hole, and an elastic ring having a mandrel on the inner periphery; And a vent main body mounted on the inner side of the mandrel, wherein the vent main body is formed of an elastic body and has a slit formed at the top thereof.
By separating the air vent plug into an elastic ring that is directly attached to the stepped hole and a vent body that is attached to the elastic ring, even if there is a heat treatment deformation in the stepped hole, the elastic ring is absorbed and sealed. The adverse effect on sex can be reduced.

請求項７の発明は、外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、前記空気抜き栓は弾性体で成形してあり、スリットを形成した頂部と、前記段付き孔の小径部に挿入するための筒状部と、前記筒状部の外周に延在し前記環状底面と密着するフランジ部とを有し、前記筒状部の内周面に心金を設けるとともに、前記心金に、軸方向に延伸して先端に前記外輪の内周面に引っ掛けるためのフックをもった延長部を形成したことを特徴とするものである。
段付き孔に挿入した空気抜き栓をフランジ部とフックで軸方向両側からはさむことにより、空気抜き栓をしっかりと固定し、しかも、フランジ部を環状底面に密着させて密封作用を発揮させることができる。したがって、段付き孔に熱処理変形が生じても密封性に悪影響を及ぼすことが少なくなる。 According to a seventh aspect of the present invention, there is provided a double row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device attached to both end openings of the outer ring, and penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. And an air vent plug inserted into a stepped hole having an annular bottom surface in the middle. The air vent plug is formed of an elastic body, and is inserted into a top portion having a slit and a small diameter portion of the stepped hole. A cylindrical portion, and a flange portion that extends to the outer periphery of the cylindrical portion and is in close contact with the annular bottom surface. A mandrel is provided on the inner circumferential surface of the cylindrical portion, and a shaft is provided on the mandrel. An extension portion having a hook that extends in the direction and is hooked to the inner peripheral surface of the outer ring is formed at the tip.
By sandwiching the air vent plug inserted into the stepped hole from both sides in the axial direction with the flange portion and the hook, the air vent plug can be firmly fixed, and the flange portion can be brought into close contact with the annular bottom surface to exert a sealing action. Therefore, even if the heat treatment deformation occurs in the stepped hole, the adverse effect on the sealing performance is reduced.

前記延長部は軸方向のスリットで分割された複数の分割片からなるものであってもよい（請求項８）。この場合、延長部はコレットのような形態で、分割片を円周方向および半径方向にある程度たわませることが可能であるため、延長部を縮径させて段付き孔の小径部に挿入し、フックが小径部から抜け出し次第、拡径させてフックを外輪の内周面に引っ掛ける、といった操作が簡単に行える。   The extension portion may be composed of a plurality of divided pieces divided by axial slits (claim 8). In this case, the extension is shaped like a collet, and the split piece can be bent to some extent in the circumferential and radial directions, so the extension is reduced in diameter and inserted into the small diameter part of the stepped hole. As soon as the hook comes out of the small diameter portion, the diameter can be increased and the hook can be easily hooked to the inner peripheral surface of the outer ring.

前記筒状部の内周に心金を設けるとともに前記心金の内周面にめねじを切り、中空の六角穴付き低頭ねじを前記外輪の内周面側から前記段付き孔の小径部に挿入して前記めねじに締め込むようにしてもよい（請求項９）。このような構成を採用することにより、外輪の内周面側から六角レンチを挿入して六角穴付き中空型低頭ねじを締め込み、あるいは緩めて、段付き孔の内周面と空気抜き栓の外周面のはめあい（締め代）を調整することができる。   A mandrel is provided on the inner periphery of the cylindrical part and a female screw is cut on the inner peripheral surface of the mandrel, and a hollow hexagon socket head screw is inserted into the small diameter part of the stepped hole from the inner peripheral surface side of the outer ring. It may be inserted and tightened into the female screw (claim 9). By adopting such a configuration, a hexagon wrench is inserted from the inner peripheral surface side of the outer ring to tighten or loosen the hexagon socket hollow low head screw, and the inner peripheral surface of the stepped hole and the outer periphery of the air vent plug Surface fit (tightening allowance) can be adjusted.

前記段付き孔の大径孔の内周面および前記空気抜き栓のフランジ部の外周面を、前記外輪の半径方向外側に向かって小径となったテーパ形状としてもよい（請求項１０）。外輪の半径方向外側に向かって小径となったテーパ形状とすることにより、前記段付き孔の大径孔の内周面および前記空気抜き栓のフランジ部の外周面の接触部に生じる締め代に起因する半径方向力の軸方向分力が下向き、すなわち、環状底面に向かって作用することになる。したがって、空気抜き栓のフランジ部を環状底面に密着させる力が増し、密封性が向上する。   The inner peripheral surface of the large-diameter hole of the stepped hole and the outer peripheral surface of the flange portion of the air vent plug may have a tapered shape with a smaller diameter toward the outer side in the radial direction of the outer ring. Due to the taper shape having a smaller diameter toward the outer side in the radial direction of the outer ring, due to the tightening margin generated at the contact portion of the inner peripheral surface of the large diameter hole of the stepped hole and the outer peripheral surface of the flange portion of the air vent plug The axial component force of the radial force acting downward acts on the annular bottom surface. Accordingly, the force for bringing the flange portion of the air vent plug into close contact with the annular bottom surface is increased, and the sealing performance is improved.

この発明によれば、外輪の段付き孔に熱処理変形があっても密封性に対する悪影響を少なくすることができる。   According to this invention, even if there is a heat treatment deformation in the stepped hole of the outer ring, the adverse effect on the sealing performance can be reduced.

以下、図面に従ってこの発明の実施の形態を説明する。まず、鉄道車両車軸用軸受装置の基本構成については図６を参照してすでに述べたとおりである。外輪２の両端部に取り付けるシール装置１８は種々の構成のものが知られており、仕様に合わせて任意のものを選択して採用することができる。   Embodiments of the present invention will be described below with reference to the drawings. First, the basic configuration of the railway vehicle axle bearing device is as already described with reference to FIG. The seal device 18 attached to both ends of the outer ring 2 is known in various configurations, and an arbitrary device can be selected and adopted according to the specifications.

図６では、空気抜き栓２０を装着するための空気抜き穴（ベントホール）として、外輪２のほぼ中央部に段付き孔が設けてある。図１に拡大して示すように、この段付き孔３０は、外輪２の外周面から内周面まで貫通しており、途中に環状底面３４をもっている。環状底面３４を境にして、半径方向外側は円筒形状の大径孔３２、半径方向内側は円筒形状の小径孔３６となっている。   In FIG. 6, a stepped hole is provided in the substantially central portion of the outer ring 2 as an air vent hole (vent hole) for mounting the air vent plug 20. As shown in FIG. 1 in an enlarged manner, the stepped hole 30 penetrates from the outer peripheral surface to the inner peripheral surface of the outer ring 2 and has an annular bottom surface 34 in the middle. With the annular bottom surface 34 as a boundary, the radially outer side is a cylindrical large-diameter hole 32 and the radially inner side is a cylindrical small-diameter hole 36.

図１に示す実施例は、空気抜き栓４０Ａを、テーパねじで互いに結合した本体４２とプラグ４８とで構成させたものである。本体４２は、ゴムを代表例とする弾性体で成形して、頂部にスリット４４が形成してあり、内周に心金４６が固定してあるといった点で、図７に関連して述べた既存のものと類似している。違っているのは心金４６の形状で、ここでは心金４６は円筒形で、内周面にテーパねじが切ってある。本体４２を構成する弾性体は、心金４６の下端面まで覆っている。   In the embodiment shown in FIG. 1, an air vent plug 40 </ b> A is constituted by a main body 42 and a plug 48 that are coupled to each other with a taper screw. The main body 42 is formed of an elastic body having rubber as a representative example, the slit 44 is formed at the top, and the mandrel 46 is fixed to the inner periphery, and is described with reference to FIG. Similar to existing ones. The difference is in the shape of the mandrel 46. Here, the mandrel 46 is cylindrical and has a taper screw on the inner peripheral surface. The elastic body constituting the main body 42 covers up to the lower end surface of the mandrel 46.

プラグ４８は中空型六角穴付きテーパねじの形態をしており、本体４２の心金４６のテーパねじにねじ込むようになっている。なお、テーパは外輪２の半径方向外側（図１の上側）に向かって小径となっている。外輪２の内周面側から六角レンチ（図示せず）を挿入してプラグ４８を回すことにより、空気抜き栓４０Ａの外径を調整し、段付き孔３０の大径孔３２の内径に対する空気抜き栓４０Ａの外径の締め代を調整することができる。例えば、プラグ４８を締め込むほど空気抜き栓４０Ａの外径が拡大して締め代が高まる。このような作用を可能にするうえで、心金４６は、材料の選択および／または分割型の採用により、弾性変形（拡径／縮径）可能にしておくのが好ましい。
また、心金４６の下端面を覆う弾性体部分が段付き孔３０の環状底面３４に密着するため、ここでもシール作用を発揮する。 The plug 48 is in the form of a hollow hexagon socket taper screw that is screwed into the taper screw of the core 46 of the main body 42. The taper has a smaller diameter toward the outer side in the radial direction of the outer ring 2 (upper side in FIG. 1). By inserting a hexagon wrench (not shown) from the inner peripheral surface side of the outer ring 2 and turning the plug 48, the outer diameter of the air vent plug 40A is adjusted, and the air vent plug for the inner diameter of the large diameter hole 32 of the stepped hole 30 is adjusted. The tightening allowance of the outer diameter of 40A can be adjusted. For example, as the plug 48 is tightened, the outer diameter of the air vent plug 40A is increased, and the tightening margin is increased. In order to enable such an action, the mandrel 46 is preferably made elastically deformable (expanded diameter / reduced diameter) by selecting a material and / or adopting a split type.
In addition, since the elastic body portion covering the lower end surface of the mandrel 46 is in close contact with the annular bottom surface 34 of the stepped hole 30, a sealing action is also exhibited here.

図２（Ａ）に示す実施例は、段付き孔３０の大径孔３２を外輪２の半径方向外側に向かって小径となったテーパ形状としたものである。段付き孔３０の環状底面３４、小径孔３６は図１の実施例と変わりがない。空気抜き栓４０Ｂも、図１の実施例における空気抜き栓４０Ａの本体４２と類似の構成である。すなわち、本体４２は、ゴムを代表例とする弾性体で成形して、頂部にスリット４４が形成してあり、内周に心金４６が固定してある。ここでは心金４６は円筒形で、本体４２を構成する弾性体は心金４６の下端面まで覆っている。   In the embodiment shown in FIG. 2A, the large-diameter hole 32 of the stepped hole 30 has a tapered shape with a smaller diameter toward the outer side in the radial direction of the outer ring 2. The annular bottom surface 34 and the small diameter hole 36 of the stepped hole 30 are the same as in the embodiment of FIG. The air vent plug 40B has a configuration similar to the main body 42 of the air vent plug 40A in the embodiment of FIG. That is, the main body 42 is formed of an elastic body having rubber as a representative example, a slit 44 is formed at the top, and a mandrel 46 is fixed to the inner periphery. Here, the mandrel 46 is cylindrical, and the elastic body constituting the main body 42 covers the lower end surface of the mandrel 46.

空気抜き栓４０Ｂは、図７に示した既存のものを利用することもできるが、図２（Ｂ）に示すように、本体４２の開口縁５０の形状、寸法を次のようにしてもよい。すなわち、本体４２の開口縁５２を、自然状態では先端側ほど小径となった円すい台形状とし、先端の外径ｄを大径孔３２の入り口の内径ｄ１よりもわずかに小さくする。本体４２の外周面も、段付き孔３０の大径孔３２の内周面に合わせてテーパ状とする。   As the air vent plug 40B, the existing one shown in FIG. 7 can be used. However, as shown in FIG. 2B, the shape and size of the opening edge 50 of the main body 42 may be as follows. That is, the opening edge 52 of the main body 42 is formed in a truncated cone shape having a smaller diameter toward the distal end side in the natural state, and the outer diameter d of the distal end is slightly smaller than the inner diameter d1 of the entrance of the large diameter hole 32. The outer peripheral surface of the main body 42 is also tapered to match the inner peripheral surface of the large-diameter hole 32 of the stepped hole 30.

このような構成を採用することにより、空気抜き栓４０Ｂを段付き孔３０の大径孔３２に挿入して環状底面３４に押し当てると、本体３４の開口縁５０が図２（Ｂ）に破線で示すように弾性変形する。これに伴い本体４２の外周面はいくぶん膨出する。その結果、段付き孔３０の大径孔３２の壁面に対する締め代が高まる。このようにして締め代を調整することができる。テーパ形状であることから、本体４２の半径方向外側への拡径または膨出は図の上向きの分力を発生させるため、空気抜き栓４０Ｂが大径孔３２の内周面に食い込んで密封性が高まる。   By adopting such a configuration, when the air vent plug 40B is inserted into the large-diameter hole 32 of the stepped hole 30 and pressed against the annular bottom surface 34, the opening edge 50 of the main body 34 is indicated by a broken line in FIG. Elastically deform as shown. As a result, the outer peripheral surface of the main body 42 bulges somewhat. As a result, the tightening margin for the wall surface of the large diameter hole 32 of the stepped hole 30 is increased. In this way, the tightening allowance can be adjusted. Due to the tapered shape, the radially outward expansion or bulging of the main body 42 generates an upward component force in the figure, so that the air vent plug 40B bites into the inner peripheral surface of the large-diameter hole 32 to provide a sealing property. Rise.

また、図２（Ａ）において、心金４６の内周面にテーパねじを形成し、そのテーパねじに中空のプラグを装着するようにしてもよい（図１参照）。これは、図１の実施例の改変例として上ですでに言及したように、空気抜き栓４０Ａの外周面と段付き孔３０の大径孔３２の内周面をテーパ形状にしたものに相当する。   2A, a taper screw may be formed on the inner peripheral surface of the mandrel 46, and a hollow plug may be attached to the taper screw (see FIG. 1). As already mentioned above as a modification of the embodiment of FIG. 1, this corresponds to a taper shape on the outer peripheral surface of the air vent plug 40A and the inner peripheral surface of the large-diameter hole 32 of the stepped hole 30. .

図３（Ａ）に示す実施例は、空気抜き栓４０Ｃを、互いに別体の本体４２とリング５２とで構成したものである。本体４２は図７を参照して述べた既存のものと実質的に同じである。すなわち、本体４２はゴムを代表とする弾性体でキャップ状に成形し、頂部にスリット４４を形成し、内周に心金４６を固定したものである。リング５２は、ゴムを代表とする弾性体を環状に成形し、内周に心金５４を固定したものである。この空気抜き栓４０Ｃを段付き孔３０に装着するにあたっては、図３（Ｂ）に示すように、まず、外輪２の段付き孔３０の大径孔３２にリング５２を押し込み、次に、リング５２の心金５４の内側に本体４２を押し込む。段付き孔３０の環状底面３４と小径孔３６に関しては上述の実施例と変わりはない。   In the embodiment shown in FIG. 3A, the air vent plug 40C is constituted by a main body 42 and a ring 52 which are separate from each other. The main body 42 is substantially the same as the existing one described with reference to FIG. That is, the main body 42 is formed of an elastic body typified by rubber in a cap shape, has a slit 44 formed at the top, and a mandrel 46 fixed to the inner periphery. The ring 52 is formed by annularly forming an elastic body typified by rubber and fixing a mandrel 54 on the inner periphery. When the air vent plug 40C is attached to the stepped hole 30, as shown in FIG. 3B, first, the ring 52 is pushed into the large-diameter hole 32 of the stepped hole 30 of the outer ring 2, and then the ring 52 The main body 42 is pushed inside the mandrel 54. The annular bottom surface 34 and the small-diameter hole 36 of the stepped hole 30 are not different from the above-described embodiment.

リング５２の外周が弾性体で構成されているため、その弾性体が大径孔３２の壁面に密着して、大径孔３２に熱処理変形等があってもそれを吸収する。心金５４の外周面だけでなく端面にも内向きフランジ状の弾性体部分５６を形成することにより、環状底面３４と密着してここでもシール性を発揮させることができる。本体４２とリング５２との間では、本体４２の弾性体とリング５２の心金５４とが密着してシール性を発揮する。
心金５４は両端に内向きフランジを形成してある。外輪２の半径方向内側に位置する内向きフランジは本体４２を押し込んだときのストッパの役割を果たし、外輪２の半径方向外側に位置する内向きフランジは本体４２の抜け出しを防止する役割を果たす。 Since the outer periphery of the ring 52 is made of an elastic body, the elastic body is in close contact with the wall surface of the large-diameter hole 32 and absorbs even if the large-diameter hole 32 is subjected to heat treatment deformation or the like. By forming the inward flange-shaped elastic body portion 56 not only on the outer peripheral surface of the mandrel 54 but also on the end surface, it can be brought into close contact with the annular bottom surface 34 to exhibit sealing performance. Between the main body 42 and the ring 52, the elastic body of the main body 42 and the mandrel 54 of the ring 52 are brought into close contact with each other to exhibit a sealing property.
The mandrel 54 has inward flanges formed at both ends. The inward flange located on the radially inner side of the outer ring 2 serves as a stopper when the main body 42 is pushed in, and the inward flange located on the outer side in the radial direction of the outer ring 2 serves to prevent the main body 42 from coming out.

次に、図４（Ａ）を参照すると、段付き孔３０に空気抜き栓４０Ｄが装着してある。空気抜き栓４０Ｄは本体６０と心金７０ａとで構成されている。本体６０はゴムを代表例とする弾性体で成形してあり、頂部にスリット６４を形成したキャップ状の部分６２と、フランジ部６６と、筒状部６８とからなっている。フランジ部６６は筒状部６８から半径方向外側に延在し、段付き孔３０の環状底面３４と密着するようになっている。筒状部６８は段付き孔３０の小径孔３６に挿入するための部分である。   Next, referring to FIG. 4 (A), an air vent plug 40 </ b> D is attached to the stepped hole 30. The air vent plug 40D includes a main body 60 and a mandrel 70a. The main body 60 is formed of an elastic body having rubber as a representative example, and includes a cap-shaped portion 62 having a slit 64 formed at the top, a flange portion 66, and a cylindrical portion 68. The flange portion 66 extends radially outward from the tubular portion 68 and is in close contact with the annular bottom surface 34 of the stepped hole 30. The cylindrical portion 68 is a portion for insertion into the small diameter hole 36 of the stepped hole 30.

筒状部６８は中空で、その内周に円筒状の心金７０ａが取り付けてある。筒状部６８と心金７０ａは例えば焼き付けにより固着させてある。心金７０ａは筒状部６８の先端よりも軸方向に延出しており、先端に、半径方向外向きの突出部をもったフック７２が形成してある。図４（Ａ）から分かるように、フック７２は外輪２の内周面に引っ掛けるようになっている。したがって、フランジ部６６とフック７２で段付き孔３０の軸方向に外輪２をはさみつけて、空気抜き栓４０Ｄを段付き孔３０内にしっかり固定することできる。そして、フランジ部６６が環状底面３４に密着してシール機能を発揮するため、段付き孔３０に熱処理変形があったとしてもそれによって悪影響を受けることはない。   The cylindrical part 68 is hollow, and a cylindrical mandrel 70a is attached to the inner periphery thereof. The cylindrical portion 68 and the mandrel 70a are fixed by, for example, baking. The mandrel 70a extends in the axial direction from the tip of the cylindrical portion 68, and a hook 72 having a radially outward projecting portion is formed at the tip. As can be seen from FIG. 4A, the hook 72 is hooked on the inner peripheral surface of the outer ring 2. Therefore, the outer ring 2 can be sandwiched between the flange portion 66 and the hook 72 in the axial direction of the stepped hole 30 to firmly fix the air vent plug 40D in the stepped hole 30. And since the flange part 66 closely_contact | adheres to the annular bottom face 34 and exhibits a sealing function, even if heat treatment deformation | transformation has occurred in the stepped hole 30, it will not be adversely affected by it.

フランジ部６６の上面、言い換えれば環状底面３４と密着させる側とは反対側の面に心金６７を設けてもよい。心金６７を設けることによってフランジ部６６の基本形状を保持することができるため（保形性）、変形やたわみなどで環状底面３４との間にすきまができるのを防止するうえで有利である。   A mandrel 67 may be provided on the upper surface of the flange portion 66, in other words, the surface opposite to the side to be in close contact with the annular bottom surface 34. By providing the mandrel 67, the basic shape of the flange portion 66 can be maintained (shape retention), which is advantageous in preventing a gap from being formed between the annular bottom surface 34 due to deformation or deflection. .

心金７０ａは、図４（Ｂ）に示すように、筒状部６８から露出した部分を軸方向に延びたスリット７４で分割した複数の分割片７６で構成するのが好ましい。この場合、心金７０ａはコレットのような形態で、分割片７６を円周方向および半径方向にある程度たわませることが可能である。したがって、空気抜き栓４０Ｄを段付き孔３０に装着するとき、小径孔３６に挿入するときは分割片７６部分を縮径させ、フック７２が小径孔３６から抜け出した途端に分割片７６部分を拡径させてフック７２を外輪２の内周面に引っ掛ける、といった要領で簡単に、しかも確実に装着することができる。また、空気抜き栓４０Ｄを取り外す必要があるときは、フック７２部分をその外接円が小径孔３６の内径よりも小さくなるように縮径させた状態で空気抜き栓４０Ｄを外輪２の半径方向外側へ引き抜くことにより、簡単に取り外すことができる。   As shown in FIG. 4B, the mandrel 70a is preferably composed of a plurality of divided pieces 76 obtained by dividing a portion exposed from the cylindrical portion 68 with slits 74 extending in the axial direction. In this case, the mandrel 70a is shaped like a collet, and the divided piece 76 can be bent to some extent in the circumferential direction and the radial direction. Therefore, when the air vent plug 40D is attached to the stepped hole 30, when the air vent plug 40D is inserted into the small diameter hole 36, the diameter of the split piece 76 is reduced, and the split piece 76 is expanded as soon as the hook 72 comes out of the small diameter hole 36. The hook 72 can be easily and surely attached in a manner such that the hook 72 is hooked on the inner peripheral surface of the outer ring 2 by making the diameter. When it is necessary to remove the air vent plug 40D, the air vent plug 40D is pulled out radially outward of the outer ring 2 in a state where the diameter of the hook 72 is reduced so that the circumscribed circle is smaller than the inner diameter of the small diameter hole 36. Can be easily removed.

図５に示す実施例は図４の実施例の変形例に相当する。すなわち、空気抜き栓４０Ｄと空気抜き栓４０Ｅは、後者では筒状部６８の心金７０ｂの内周面にめねじを切り、中空の六角穴付き低頭ねじ７８を外輪２の内周面側から小径孔３６に挿入して心金７０ｂのめねじに締め込むようにした点で相違し、その他は実質的に異なるところはない。この場合も、フランジ部６６と六角穴付き低頭ねじ７８の頭部で外輪２をはさみつけて、空気抜き栓４０Ｅを段付き孔３０内にしっかりと固定することができる。すなわち、外輪２の内周面側から六角レンチ（図示せず）を挿入して中空型六角穴付き低頭ねじ７８を締め込み、あるいは緩めて、小径孔３６の内周面に対する空気抜き栓４０Ｅの筒状部６８の外周面の締め代を調整することができる。このような調整は、軸受の製造段階、または、分解した状態で行うものである。
なお、図示するように、外輪２の内周面にざぐり３８を設けて、中空型六角穴付き低頭ねじ７８の頭部が外輪２の内周面から突出しないようにするのが好ましい。 The embodiment shown in FIG. 5 corresponds to a modification of the embodiment of FIG. That is, in the latter case, the air vent plug 40D and the air vent plug 40E are formed by cutting a female screw on the inner peripheral surface of the mandrel 70b of the cylindrical portion 68, and the hollow hexagon socket low head screw 78 from the inner peripheral surface side of the outer ring 2 to the small diameter hole. It is different in that it is inserted into 36 and fastened to the female screw of the mandrel 70b, and the others are not substantially different. In this case as well, the air vent plug 40E can be firmly fixed in the stepped hole 30 by sandwiching the outer ring 2 with the flange 66 and the head of the hexagon socket head screw 78. That is, a hexagon wrench (not shown) is inserted from the inner peripheral surface side of the outer ring 2 and the hollow type hexagon socket head screw 78 is tightened or loosened so that the cylinder of the air vent plug 40E with respect to the inner peripheral surface of the small diameter hole 36 is obtained. The interference of the outer peripheral surface of the shape part 68 can be adjusted. Such adjustment is performed at the stage of manufacturing the bearing or in a disassembled state.
As shown in the figure, it is preferable to provide a counterbore 38 on the inner peripheral surface of the outer ring 2 so that the head of the hollow hexagon socket head screw 78 does not protrude from the inner peripheral surface of the outer ring 2.

上述の図４、図５の実施例では、段付き孔３０の大径孔３２の内周面および空気抜き栓４０Ｄ、４０Ｅのフランジ部６６の外周面を、外輪２の半径方向外側に向かって小径となったテーパ形状としてもよい。この場合、フランジ部６６と環状底面３４との間での密封に加えて、フランジ部６６の外周面の弾性を利用した密封作用も期待できる。   4 and 5 described above, the inner peripheral surface of the large-diameter hole 32 of the stepped hole 30 and the outer peripheral surface of the flange portion 66 of the air vent plugs 40D and 40E are reduced in diameter toward the outer side in the radial direction of the outer ring 2. It is good also as the taper shape which became. In this case, in addition to sealing between the flange portion 66 and the annular bottom surface 34, a sealing action utilizing the elasticity of the outer peripheral surface of the flange portion 66 can be expected.

第１実施例を示す外輪の空気抜き栓部分の断面図である。It is sectional drawing of the air vent plug part of the outer ring | wheel which shows 1st Example. （Ａ）は第２実施例を示す外輪の空気抜き栓部分の断面図、（Ｂ）は装着過程を示す図２（Ａ）の部分拡大図である。(A) is sectional drawing of the air vent plug part of the outer ring | wheel which shows 2nd Example, (B) is the elements on larger scale of FIG. 2 (A) which show an attachment process. （Ａ）は第３実施例を示す外輪の空気抜き栓部分の断面図、（Ｂ）は装着過程を示す断面図である。(A) is sectional drawing of the air vent plug part of the outer ring | wheel which shows 3rd Example, (B) is sectional drawing which shows a mounting process. （Ａ）は第４実施例を示す外輪の空気抜き栓部分の断面図、（Ｂ）はフック部分の拡大斜視図である。(A) is sectional drawing of the air vent plug part of the outer ring | wheel which shows 4th Example, (B) is an expansion perspective view of a hook part. 第５実施例を示す外輪の空気抜き栓部分の断面図である。It is sectional drawing of the air vent plug part of the outer ring | wheel which shows 5th Example. 鉄道車両車軸用軸受装置の縦断面図である。It is a longitudinal cross-sectional view of a railway vehicle axle bearing device. （Ａ）は空気抜き栓の平面図、（Ｂ）は断面図である。(A) is a top view of an air vent plug, (B) is sectional drawing.

符号の説明Explanation of symbols

２ 外輪
４ 内輪
６ 円すいころ（転動体）
８ 保持器
１０ 車軸
１２ 前ぶた
１４ 後ぶた
１６ 肩部
１８ シール装置
２０ 空気抜き栓
３０ 段付き孔（ベントホール）
３２ 大径孔
３４ 環状底面
３６ 小径孔
３８ ざぐり
４０Ａ、４０Ｂ、４０Ｃ、４０Ｄ、４０Ｅ 空気抜き栓（ベントプラグ）
４２ 本体
４４ スリット
４６ 心金
４８ プラグ（中空型六角穴付きテーパねじ）
５０ 開口縁
５２ リング
５４ 心金
５６ 半径方向部分
６０ 本体
６２ キャップ状部分
６４ スリット
６６ フランジ部
６７ 心金
６８ 筒状部
７０ａ、７０ｂ 心金
７２ フック部
７４ スリット
７６ 分割片
７８ 六角穴付き中空型低頭ねじ 2 Outer ring 4 Inner ring 6 Tapered roller (rolling element)
8 Cage 10 Axle 12 Front lid 14 Rear lid 16 Shoulder 18 Sealing device 20 Air vent plug 30 Stepped hole (vent hole)
32 Large-diameter hole 34 Annular bottom 36 Small-diameter hole 38 Counterbore 40A, 40B, 40C, 40D, 40E Air vent plug (vent plug)
42 Body 44 Slit 46 Mandrel 48 Plug (Hollow hexagon socket taper screw)
50 Opening Edge 52 Ring 54 Mandrel 56 Radial Part 60 Body 62 Cap-shaped Part 64 Slit 66 Flange 67 Mandrel 68 Tubular Part 70a, 70b Mandrel 72 Hook Part 74 Slit 76 Divided Piece 78 Hexagonal Hollow Low Head screw

Claims (10)

外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、前記空気抜き栓は、テーパねじで互いに結合した本体と中空のテーパプラグとで構成され、前記本体は前記段付き孔の大径孔に挿入し得る外径を有し、かつ、内周に心金を設けるとともに前記心金の内周面にテーパめねじを形成してある、鉄道車両車軸用軸受装置。   A double-row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device mounted at both end openings of the outer ring, and an annular bottom surface penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. An air vent plug inserted into the stepped hole, and the air vent plug is composed of a main body and a hollow taper plug connected to each other by a taper screw, and the main body can be inserted into the large diameter hole of the stepped hole. A bearing device for a railway vehicle axle having an outer diameter and having a mandrel on the inner circumference and a taper female screw formed on the inner circumference of the mandrel. 前記本体は、弾性体で成形して、頂部にスリットが形成してある請求項１の鉄道車両車軸用軸受装置。   2. The bearing device for a railway vehicle axle according to claim 1, wherein the main body is formed of an elastic body and has a slit formed at the top. 前記テーパプラグは中空型六角穴付きテーパねじの形態である請求項１または２の鉄道車両車軸用軸受装置。   The bearing device for a railway vehicle axle according to claim 1 or 2, wherein the taper plug is in the form of a hollow hexagon socket taper screw. 外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、
前記空気抜き栓は、弾性体で成形して、頂部にスリットが形成してあり、
前記段付き孔の大径孔を前記外輪の半径方向外側に向かって小径となったテーパ形状とした鉄道車両車軸用軸受装置。 A double-row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device mounted at both end openings of the outer ring, and an annular bottom surface penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. Air vent plug inserted into the stepped hole,
The air vent plug is formed of an elastic body, and a slit is formed at the top,
A bearing device for a railway vehicle axle having a tapered shape in which a large-diameter hole of the stepped hole has a smaller diameter toward the outer side in the radial direction of the outer ring. 前記空気抜き栓は、前記段付き孔の大径孔に挿入し得る外径を有し、かつ、内周に心金を設けるとともに前記心金の内周面にテーパめねじを形成し、前記テーパめねじに中空のテーパプラグを装着した請求項４の鉄道車両車軸用軸受装置。   The air vent plug has an outer diameter that can be inserted into the large-diameter hole of the stepped hole, and a mandrel is provided on the inner periphery, and a tapered female screw is formed on the inner peripheral surface of the mandrel, and the taper The bearing device for a railway vehicle axle according to claim 4, wherein a hollow taper plug is attached to the female screw. 外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、
前記空気抜き栓は、前記段付き孔の大径孔に挿入する、内周に心金をもった弾性体リングと、前記心金の内側に装着するベント本体とを有し、
前記ベント本体は、弾性体で成形して、頂部にスリットが形成してある、鉄道車両車軸用軸受装置。 A double-row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device mounted at both end openings of the outer ring, and an annular bottom surface penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. Air vent plug inserted into the stepped hole,
The air vent plug has an elastic body ring having a mandrel on an inner periphery, inserted into the large-diameter hole of the stepped hole, and a vent body attached to the inside of the mandrel,
The bearing body for a railway vehicle axle, wherein the vent body is formed of an elastic body and has a slit formed at the top. 外輪と一対の内輪と２列の転動体を有する複列転がり軸受と、前記外輪の両端開口部に装着したシール装置と、前記外輪の外周面から内周面まで貫通し途中に環状底面をもった段付き孔に挿入した空気抜き栓を具備し、
前記空気抜き栓は弾性体で成形してあり、スリットを形成した頂部と、前記段付き孔の小径部に挿入するための筒状部と、前記筒状部の外周に延在し前記環状底面と密着するフランジ部とを有し、前記筒状部の内周面に心金を設けるとともに、前記心金に、軸方向に延伸して先端に前記外輪の内周面に引っ掛けるためのフックをもった延長部を形成した、鉄道車両車軸用軸受装置。 A double-row rolling bearing having an outer ring, a pair of inner rings and two rows of rolling elements, a seal device mounted at both end openings of the outer ring, and an annular bottom surface penetrating from the outer peripheral surface to the inner peripheral surface of the outer ring. Air vent plug inserted into the stepped hole,
The air vent plug is formed of an elastic body, and includes a top portion formed with a slit, a cylindrical portion for insertion into a small diameter portion of the stepped hole, and an annular bottom surface extending to the outer periphery of the cylindrical portion. And a mandrel provided on the inner peripheral surface of the tubular part, and a hook for extending in the axial direction and hooking the tip of the mandrel on the inner peripheral surface of the outer ring. A railway vehicle axle bearing device in which an extended portion is formed. 前記延長部は軸方向のスリットで分割された複数の分割片からなる請求項７の鉄道車両車軸用軸受装置。   The bearing device for a railway vehicle axle according to claim 7, wherein the extension portion includes a plurality of divided pieces divided by an axial slit. 前記筒状部の内周に心金を設けるとともに前記心金の内周面にめねじを切り、中空の六角穴付き低頭ねじを前記外輪の内周面側から前記段付き孔の小径部に挿入して前記めねじに締め込むようにした請求項７または８の鉄道車両車軸用軸受装置。   A mandrel is provided on the inner periphery of the cylindrical part and a female screw is cut on the inner peripheral surface of the mandrel, and a hollow hexagon socket head screw is inserted into the small diameter part of the stepped hole from the inner peripheral surface side of the outer ring. 9. The bearing device for a railway vehicle axle according to claim 7 or 8, wherein the bearing device is inserted and tightened to the female screw. 前記段付き孔の大径孔の内周面および前記空気抜き栓のフランジ部の外周面を、前記外輪の半径方向外側に向かって小径となったテーパ形状とした請求項７から９のいずれか１項の鉄道車両車軸用軸受装置。   The inner peripheral surface of the large-diameter hole of the stepped hole and the outer peripheral surface of the flange portion of the air vent plug are tapered so that the diameter decreases toward the outer side in the radial direction of the outer ring. The bearing device for a railcar axle according to the item.
JP2008274300A 2008-10-24 2008-10-24 Railway vehicle axle bearing device Expired - Fee Related JP5160374B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008274300A JP5160374B2 (en) 2008-10-24 2008-10-24 Railway vehicle axle bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008274300A JP5160374B2 (en) 2008-10-24 2008-10-24 Railway vehicle axle bearing device

Publications (2)

Publication Number Publication Date
JP2010100196A true JP2010100196A (en) 2010-05-06
JP5160374B2 JP5160374B2 (en) 2013-03-13

Family

ID=42291220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008274300A Expired - Fee Related JP5160374B2 (en) 2008-10-24 2008-10-24 Railway vehicle axle bearing device

Country Status (1)

Country Link
JP (1) JP5160374B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381122A1 (en) 2010-04-23 2011-10-26 Nisshinbo Brake Inc. Automatic shoe clearance adjustment apparatus
JP2019024746A (en) * 2017-07-27 2019-02-21 有限会社ユタカ産業 Valve set and cup
CN109844380A (en) * 2016-11-23 2019-06-04 舍弗勒技术股份两合公司 Sealing device
JP2020046054A (en) * 2018-09-21 2020-03-26 Ntn株式会社 Axle bearing device

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4627369Y1 (en) * 1967-01-28 1971-09-21
JPS5018847U (en) * 1973-06-15 1975-03-03
JPS52158254U (en) * 1976-05-25 1977-12-01
JPS5629315U (en) * 1979-08-13 1981-03-19
JPS60249726A (en) * 1984-05-25 1985-12-10 Nippon Seiko Kk Bearing device for axle
JPH04123871U (en) * 1991-04-25 1992-11-10 光洋精工株式会社 Bearing device for railway vehicles
JPH0525023U (en) * 1991-08-09 1993-04-02 株式会社不二越 Sealed journal bearing device
JP2001027254A (en) * 1999-07-15 2001-01-30 Ntn Corp Bearing unit for rolling stock
JP2006226503A (en) * 2005-02-21 2006-08-31 Ntn Corp Bearing, bearing device and gas bleeder plug
JP2006234149A (en) * 2005-02-28 2006-09-07 Ntn Corp Gas vent plug of bearing and bearing device
JP2007333190A (en) * 2006-06-19 2007-12-27 Ntn Corp Double row rolling bearing
JP2008082392A (en) * 2006-09-26 2008-04-10 Ntn Corp Bearing device for railroad vehicle wheel shaft
JP2008232301A (en) * 2007-03-20 2008-10-02 Ntn Corp Bearing device for railroad vehicle axle

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4627369Y1 (en) * 1967-01-28 1971-09-21
JPS5018847U (en) * 1973-06-15 1975-03-03
JPS52158254U (en) * 1976-05-25 1977-12-01
JPS5629315U (en) * 1979-08-13 1981-03-19
JPS60249726A (en) * 1984-05-25 1985-12-10 Nippon Seiko Kk Bearing device for axle
JPH04123871U (en) * 1991-04-25 1992-11-10 光洋精工株式会社 Bearing device for railway vehicles
JPH0525023U (en) * 1991-08-09 1993-04-02 株式会社不二越 Sealed journal bearing device
JP2001027254A (en) * 1999-07-15 2001-01-30 Ntn Corp Bearing unit for rolling stock
JP2006226503A (en) * 2005-02-21 2006-08-31 Ntn Corp Bearing, bearing device and gas bleeder plug
JP2006234149A (en) * 2005-02-28 2006-09-07 Ntn Corp Gas vent plug of bearing and bearing device
JP2007333190A (en) * 2006-06-19 2007-12-27 Ntn Corp Double row rolling bearing
JP2008082392A (en) * 2006-09-26 2008-04-10 Ntn Corp Bearing device for railroad vehicle wheel shaft
JP2008232301A (en) * 2007-03-20 2008-10-02 Ntn Corp Bearing device for railroad vehicle axle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381122A1 (en) 2010-04-23 2011-10-26 Nisshinbo Brake Inc. Automatic shoe clearance adjustment apparatus
CN109844380A (en) * 2016-11-23 2019-06-04 舍弗勒技术股份两合公司 Sealing device
JP2019024746A (en) * 2017-07-27 2019-02-21 有限会社ユタカ産業 Valve set and cup
JP2020046054A (en) * 2018-09-21 2020-03-26 Ntn株式会社 Axle bearing device
JP7065739B2 (en) 2018-09-21 2022-05-12 Ntn株式会社 Axle bearing equipment

Also Published As

Publication number Publication date
JP5160374B2 (en) 2013-03-13

Similar Documents

Publication Publication Date Title
JP5160374B2 (en) Railway vehicle axle bearing device
US20150267790A1 (en) Idler or roller device
JP2008275027A (en) Manufacturing method of power transmission and power transmission manufactured by this method
JP2009510376A (en) Rolling bearing
US6959733B2 (en) Closure plug for sealingly closing a hole in a structural member
JPWO2017221371A1 (en) Tire condition monitoring device
JP2007276780A (en) Vehicle bearing device
JP2019035458A (en) Hub unit bearing and method of assembling hub unit bearing
JP2007161247A (en) Bearing device for axle
JP4818966B2 (en) Railway vehicle axle bearing device
JP2008039106A (en) Bearing device for wheel
JP4519005B2 (en) Wheel bearing device
JP4562461B2 (en) Wheel bearing device
KR102040731B1 (en) Sealing device for wheel bearing and wheel bearing assembly comprising the same
JP2008019905A (en) Sealed roller bearing device
JP2005324598A (en) Bearing device for wheel, and hub bolt
JP6456259B2 (en) Overflow tube
JP2007327508A (en) Wheel bearing device
JP2018105392A (en) Bearing structure for wheel
JP3625039B2 (en) Caulking auxiliary jig
JP2008221859A (en) Wheel supporting device
CN205768351U (en) Hub unit bearing
JP5052846B2 (en) Wheel bearing device
JPH0858301A (en) Hub cap structure of wheel
JP5910347B2 (en) Rolling bearing device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110920

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120913

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120920

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20121019

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20121129

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121212

R150 Certificate of patent or registration of utility model

Ref document number: 5160374

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151221

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees