JP6706468B2 - Sealing device - Google Patents

Sealing device Download PDF

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JP6706468B2
JP6706468B2 JP2015168980A JP2015168980A JP6706468B2 JP 6706468 B2 JP6706468 B2 JP 6706468B2 JP 2015168980 A JP2015168980 A JP 2015168980A JP 2015168980 A JP2015168980 A JP 2015168980A JP 6706468 B2 JP6706468 B2 JP 6706468B2
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ring
outer ring
sealing device
bearing
inner ring
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JP2017044302A (en
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干城 下原
干城 下原
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Nok Corp
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Nok Corp
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、シール技術に係る密封装置に関し、更に詳しくは、鉄道車両の車軸軸受部に用いられる密封装置に関する。 The present invention relates to a sealing device according to a sealing technique, and more specifically, to a sealing device used for an axle bearing portion of a railway vehicle.

鉄道車両の車軸軸受部に用いられる密封装置として従来から図３に示すように、軸受６１の外輪６２に取り付けられる外環５２と、外環５２の内周側に嵌合される内環５３とを有する密封装置５１が知られている。内環５３は、回転側部品６３との間に微小間隙ｃを形成して非接触式のラビリンスシールを構成し、これにより軸受外部Ｏの異物が軸受内部Ｉへ侵入したり軸受内部Ｉのグリースが軸受外部Ｏへ飛散したりするのを抑制する。 As a conventional sealing device used for an axle bearing portion of a railway vehicle, as shown in FIG. 3, an outer ring 52 attached to an outer ring 62 of a bearing 61, and an inner ring 53 fitted to an inner peripheral side of the outer ring 52. A sealing device 51 having a is known. The inner ring 53 forms a minute gap c between the inner ring 53 and the rotary side component 63 to form a non-contact type labyrinth seal, which allows foreign matter in the bearing outside O to enter the bearing inside I and grease in the bearing inside I. Are prevented from scattering to the outside O of the bearing.

特開２００５−２２０９４０号公報JP, 2005-220940, A 特開２０１１−２５６９６５号公報JP, 2011-256965, A

上記外環５２および内環５３は別部材であるため、外環５２に内環５３を嵌合する組立て作業が必要となる。よって最適なシール機能を発揮させるべく組立てに際しては、内環５３を規定の位置（設定どおりの正確な軸方向位置）に挿入する必要があり、また組立て後、外環５２に対し内環５３が軸方向に位置ずれしないようにする必要がある。 Since the outer ring 52 and the inner ring 53 are separate members, assembly work for fitting the inner ring 53 to the outer ring 52 is required. Therefore, it is necessary to insert the inner ring 53 into a prescribed position (accurate axial position as set) at the time of assembly so as to exert an optimum sealing function. It is necessary to prevent displacement in the axial direction.

組立て後、外環５２に対し内環５３が軸方向に位置ずれしないようにするには、内環５３の嵌合力を強く設定することが考えられる。しかしながらこのように内環５３の嵌合力を強く設定すると、挿入時の抵抗力が増大するため、組立て作業性が悪化することが懸念される。 In order to prevent the inner ring 53 from being displaced in the axial direction with respect to the outer ring 52 after assembly, it is conceivable to set the fitting force of the inner ring 53 to be strong. However, if the fitting force of the inner ring 53 is set to be strong as described above, the resistance force at the time of insertion increases, and thus there is a concern that the assembly workability deteriorates.

本発明は以上の点に鑑みて、組立て後、外環に対し内環が軸方向に位置ずれするのを抑制することができ、しかも内環の嵌合力を強く設定する必要もない密封装置を提供することを目的とする。 In view of the above points, the present invention provides a sealing device that can suppress axial displacement of the inner ring with respect to the outer ring after assembly and does not require strong setting of the fitting force of the inner ring. The purpose is to provide.

本発明は上記目的を達成するため、以下の手段を採用した。
すなわち本発明の密封装置は、鉄道車両の車軸軸受部に用いられる密封装置であって、軸受の外輪に取り付けられる外環と、前記外環の内周側に嵌合される内環とを有する密封装置において、前記外環の内周面に、カシメ突起よりなる両環位置決め構造を設け、前記外環の内周側に前記内環を前記カシメ突起で軸方向に係合させ、前記内環は、前記外環の内周面に嵌合される外周筒部と、前記外周筒部の軸受内部側端部から径方向内方へ向けて設けられた端面部と、前記端面部の内周端部から軸受内部側へ向けて設けられ、回転側部品との間に微小間隙を形成して非接触式のラビリンスシールを構成する内周筒部と、を一体に備えることを特徴とする（請求項１）。
The present invention adopts the following means in order to achieve the above object.
That is, the sealing device of the present invention is a sealing device used for an axle bearing portion of a railway vehicle, and has an outer ring attached to the outer ring of the bearing and an inner ring fitted to the inner peripheral side of the outer ring. In the sealing device, both ring positioning structures formed by caulking projections are provided on the inner peripheral surface of the outer ring, and the inner ring is axially engaged with the caulking projections on the inner peripheral side of the outer ring to form the inner ring. Is an outer peripheral cylindrical portion fitted to the inner peripheral surface of the outer ring, an end surface portion provided radially inward from an end portion on the bearing inner side of the outer peripheral cylindrical portion, and an inner peripheral surface of the end surface portion. It is characterized in that it is integrally provided with an inner peripheral cylinder portion that is provided from the end portion toward the inside of the bearing and forms a non-contact type labyrinth seal by forming a minute gap with the rotating side component ( Claim 1).

上記構成を備える本発明の密封装置においては、外環の内周面に、カシメ突起よりなる両環位置決め構造が設けられているため、内環がカシメ突起に係合することで、内環が軸方向に位置ずれするのを抑制することが可能とされる。また、内環がカシメ突起に係合することで内環の位置ずれを抑制するため、内環の嵌合力を強く設定する必要がない。カシメ突起は、外環の内周側に内環を挿入した後、外環の一部を径方向内方へ向けカシメ加工することにより形成される。 In the sealing device of the present invention having the above-mentioned configuration, since the inner ring of the outer ring is provided with both ring positioning structures formed by the caulking protrusions, the inner ring is engaged with the caulking protrusions, so that the inner ring is It is possible to suppress displacement in the axial direction. Further, since the inner ring engages with the crimping protrusion to prevent the inner ring from being displaced, it is not necessary to set the fitting force of the inner ring strongly. The crimping projection is formed by inserting the inner ring into the inner circumferential side of the outer ring and then crimping a part of the outer ring inward in the radial direction.

カシメ突起としては、外環の全周に亙って環状に設けても良いが、円周上複数個所に設ければ、その機能（位置ずれ抑制機能）を発揮することができる。 The crimping protrusions may be provided annularly over the entire circumference of the outer ring, but if they are provided at a plurality of positions on the circumference, the function (positional deviation suppressing function) can be exhibited.

本発明によれば、組立て後、外環に対し内環が軸方向に位置ずれするのを抑制することができ、しかも内環の嵌合力を強く設定する必要もない密封装置を提供することができる。 Advantageous Effects of Invention According to the present invention, it is possible to provide a sealing device that can suppress axial displacement of the inner ring with respect to the outer ring after assembly and does not require a strong setting of the fitting force of the inner ring. it can.

本発明の実施例に係る密封装置の要部断面図Sectional drawing of the principal part of the sealing device which concerns on the Example of this invention. （Ａ）は同密封装置に備えられるカシメ突起の拡大断面図、（Ｂ）はカシメ突起の他の例を示す断面図(A) is an enlarged cross-sectional view of a caulking protrusion provided in the same sealing device, and (B) is a sectional view showing another example of the caulking protrusion. 従来例に係る密封装置の断面図Sectional drawing of the sealing device which concerns on a prior art example.

つぎに本発明の実施例を図面にしたがって説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.

図１に示すように、当該実施例に係る密封装置１１は、鉄道車両の車軸軸受部に用いられる密封装置であって、軸受の外輪６２に取り付けられる外環２１と、外環２１の内周側に嵌合される内環３１とを有している。 As shown in FIG. 1, a sealing device 11 according to the embodiment is a sealing device used for an axle bearing portion of a railway vehicle, and includes an outer ring 21 attached to an outer ring 62 of the bearing and an inner circumference of the outer ring 21. It has the inner ring 31 fitted to the side.

外環２１は、軸受の外輪６２の内周面に嵌合される外周筒部２２を有し、この外周筒部２２の軸方向一方（軸受外部側、図では左方）の端部から径方向内方へ向けて端面部２３が一体成形され、端面部２３の内周端部から軸方向一方へ向けて筒状部２４が一体成形され、筒状部２４の軸方向一方の端部から軸方向一方かつ内径方向へ向けて円錐面状のテーパー部２５が一体成形され、テーパー部２５の軸方向一方の端部（小径側の端部）から軸方向一方へ向けて内周筒部２６が一体成形され、内周筒部２６の軸方向一方の端部から径方向内方へ向けて折り曲げ部２７が一体成形されている。 The outer ring 21 has an outer peripheral cylindrical portion 22 that is fitted to the inner peripheral surface of the outer ring 62 of the bearing, and the diameter is measured from one end of the outer peripheral cylindrical portion 22 in the axial direction (outer side of the bearing, left in the figure). The end face portion 23 is integrally formed inward in the direction, the tubular portion 24 is integrally formed from the inner peripheral end portion of the end face portion 23 toward one side in the axial direction, and one end portion in the axial direction of the tubular portion 24 is formed. The tapered portion 25 having a conical surface shape is integrally formed toward one side in the axial direction and toward the inner diameter side, and the inner peripheral tubular portion 26 extends from one end portion (the end portion on the small diameter side) in the axial direction of the tapered portion 25 toward the one side in the axial direction. Is integrally formed, and the bent portion 27 is integrally formed from one end portion in the axial direction of the inner peripheral tubular portion 26 toward the inner side in the radial direction.

一方、内環３１は、外環２１の筒状部２４の内周面に嵌合される外周筒部３２を有し、この外周筒部３２の軸方向他方（軸受内部側、図では右方）の端部から径方向内方へ向けて端面部３３が一体成形され、端面部３３の内周端部から軸方向他方へ向けて内周筒部３４が一体成形されている。内環３１は、回転側部品（図示せず）との間に微小間隙を形成して非接触式のラビリンスシールを構成し、これにより軸受外部の異物が軸受内部へ侵入したり軸受内部のグリースが軸受外部へ飛散したりするのを抑制する。 On the other hand, the inner ring 31 has an outer peripheral tubular portion 32 that is fitted to the inner peripheral surface of the tubular portion 24 of the outer annular ring 21. ), the end face portion 33 is integrally formed from the end portion toward the inner side in the radial direction, and the inner peripheral tubular portion 34 is integrally formed from the inner peripheral end portion of the end face portion 33 toward the other axial direction. The inner ring 31 forms a non-contact type labyrinth seal by forming a minute gap between the inner ring 31 and a rotating side component (not shown), whereby foreign matter outside the bearing enters into the bearing or grease inside the bearing. Suppresses scattering outside the bearing.

外環２１および内環３１はともに金属環である。また、外環２１および内環３１は互いに別部材であるため、外環２１の内周側に内環３１を嵌合する組立て作業を行うことになり、組立てに際しては、内環３１を規定の位置に挿入する必要があり、挿入後、外環２１に対し内環３１が軸方向に位置ずれするのは、上記微小間隙の大きさが変わってしまうこともあり、好ましくない。そこで当該実施例では、挿入後、外環２１に対し内環３１が軸方向に位置ずれするのを防止するための両環位置決め構造４１が設けられている。 The outer ring 21 and the inner ring 31 are both metal rings. Further, since the outer ring 21 and the inner ring 31 are separate members, an assembly work of fitting the inner ring 31 to the inner peripheral side of the outer ring 21 is performed, and the inner ring 31 is specified when assembling. It is necessary to insert it in a position, and it is not preferable that the inner ring 31 is axially displaced relative to the outer ring 21 after the insertion because the size of the minute gap may change. Therefore, in this embodiment, a double ring positioning structure 41 is provided for preventing the inner ring 31 from being axially displaced with respect to the outer ring 21 after insertion.

両環位置決め構造４１は、外環２１の内周側に内環３１を挿入した後、外環２１の一部を径方向内方へ向けカシメ加工してカシメ突起２８を形成することにより構成されており、一層詳細には、外環２１の内周面における規定位置に内環３１を挿入した後（挿入方向を矢印Ｓにて示す）、外環２１の筒状部２４の一部であって上記規定位置の軸方向他方に隣接する部位（軸受内部側の部位）を径方向内方へ向けカシメ加工して（カシメ方向を矢印Ｋにて示す）、カシメ突起２８を形成することにより構成されている。 The both ring positioning structure 41 is formed by inserting the inner ring 31 on the inner peripheral side of the outer ring 21 and then caulking a part of the outer ring 21 inward in the radial direction to form the caulking projection 28. More specifically, after inserting the inner ring 31 into a specified position on the inner peripheral surface of the outer ring 21 (the insertion direction is indicated by an arrow S), it is a part of the tubular portion 24 of the outer ring 21. A portion adjacent to the other of the above defined positions in the axial direction (a portion on the inner side of the bearing) is caulked inward in the radial direction (the caulking direction is indicated by an arrow K) to form a caulking projection 28. Has been done.

カシメ加工は、カシメ治具（ポンチなど、図示せず）を用いて行い、カシメ治具を外環２１の外周面に押し付けて外環２１の全厚を径方向内方へ向けて凹ませる。カシメ突起２８は円周上複数個所に形成され、例えば４〜８等配で形成される（図では１箇所のみを示している）。 The caulking process is performed using a caulking jig (a punch or the like, not shown), and the caulking jig is pressed against the outer peripheral surface of the outer ring 21 to make the entire thickness of the outer ring 21 concave inward in the radial direction. The crimping protrusions 28 are formed in a plurality of places on the circumference, for example, in a 4 to 8 equidistant arrangement (only one place is shown in the drawing).

カシメ突起の断面形状は図２（Ａ）に示すように断面円弧形（エンボス形）されるが、その他の形状であっても良く、例えば図２（Ｂ）に示すように断面三角形ないし略三角形状（クサビ形）であっても良い。 The cross-sectional shape of the caulking protrusion is an arc shape (embossed shape) in cross section as shown in FIG. 2A, but may be another shape, for example, a triangular cross section or a substantially cross section as shown in FIG. 2B. It may have a triangular shape (wedge shape).

また、その断面形状の如何を問わず、カシメ治具を用いて外環２１の内周面にカシメ突起２８を設けると、外環２１の外周面には、対応してカシメ加工の加工痕２９が凹部状のものとして形成される。 Further, regardless of the cross-sectional shape, when the caulking projection 28 is provided on the inner peripheral surface of the outer ring 21 by using the caulking jig, the outer peripheral surface of the outer ring 21 has a corresponding processing mark 29 for caulking. Are formed as concave portions.

上記構成の密封装置１１においては、上記したようにカシメ突起２８よりなる両環位置決め構造４１が設けられているため、内環３１がカシメ突起２８に係合することで、外環２１に対し内環３１が軸方向他方へ向けて位置ずれすることがない。したがって、鉄道車両の走行に伴う振動などが入力しても内環３１が外環２１に対し軸方向に位置ずれすることがなく、前記微小間隙の大きさが変わらない。 In the sealing device 11 having the above-described configuration, since the both ring positioning structure 41 including the caulking protrusions 28 is provided as described above, the inner ring 31 engages with the caulking protrusions 28, so that The ring 31 will not be displaced in the other axial direction. Therefore, the inner ring 31 will not be axially displaced with respect to the outer ring 21 even if vibration or the like accompanying the traveling of the railway vehicle is input, and the size of the minute gap does not change.

また、内環３１がカシメ突起２８に係合することで内環３１が外環２１に対し軸方向に位置ずれするのを抑制するために、内環３１の嵌合力を強く設定する必要がない。したがって、挿入時の抵抗力が増大して組立て作業性が悪化するのを未然に防止することができる。 Further, it is not necessary to set the fitting force of the inner ring 31 strongly in order to prevent the inner ring 31 from being axially displaced with respect to the outer ring 21 due to the engagement of the inner ring 31 with the crimping protrusion 28. .. Therefore, it is possible to prevent the workability of assembling from being deteriorated due to an increase in resistance force during insertion.

１１ 密封装置
２１ 外環
２２，３２ 外周筒部
２３，３３ 端面部
２４ 筒状部
２５ テーパー部
２６，３４ 内周筒部
２７ 折り曲げ部
２８ カシメ突起
２９ 加工痕
３１ 内環
４１ 両環位置決め構造
６２ 軸受外輪 11 Sealing Device 21 Outer Ring 22, 32 Outer Cylinder 23, 33 End Face 24 Cylinder 25 Tapered 26, 34 Inner Cylinder 27 Bent 28 Crimping Protrusion 29 Machining Trace 31 Inner Ring 41 Double Ring Positioning Structure 62 Bearing Outer ring

Claims (2)

鉄道車両の車軸軸受部に用いられる密封装置であって、軸受の外輪に取り付けられる外環と、前記外環の内周側に嵌合される内環とを有する密封装置において、
前記外環の内周面に、カシメ突起よりなる両環位置決め構造を設け、
前記外環の内周側に前記内環を前記カシメ突起で軸方向に係合させ、
前記内環は、前記外環の内周面に嵌合される外周筒部と、前記外周筒部の軸受内部側端部から径方向内方へ向けて設けられた端面部と、前記端面部の内周端部から軸受内部側へ向けて設けられ、回転側部品との間に微小間隙を形成して非接触式のラビリンスシールを構成する内周筒部と、を一体に備えることを特徴とする密封装置。 A sealing device used for an axle bearing portion of a railway vehicle, the sealing device having an outer ring attached to an outer ring of the bearing and an inner ring fitted to an inner peripheral side of the outer ring,
On the inner peripheral surface of the outer ring, both ring positioning structure consisting of caulking projections is provided,
The inner ring is axially engaged with the inner ring side of the outer ring by the caulking projections,
The inner ring has an outer peripheral tubular portion fitted to the inner peripheral surface of the outer ring, an end face portion provided radially inward from an end portion on the bearing inner side of the outer peripheral tubular portion, and the end face portion. Is integrally provided with an inner peripheral cylinder portion that is provided from the inner peripheral end portion of the inside of the bearing toward the inside of the bearing and that forms a non-contact type labyrinth seal by forming a minute gap with the rotating side component. And a sealing device. 請求項１記載の密封装置において、
前記カシメ突起を、円周上複数個所に設けたことを特徴とする密封装置。 The sealing device according to claim 1,
A sealing device, characterized in that the crimping projections are provided at a plurality of locations on the circumference.
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JPS5032351A (en) * 1973-07-25 1975-03-29
JPS5865446U (en) * 1981-10-26 1983-05-04 カヤバ工業株式会社 Shock absorber
JPH0744862Y2 (en) * 1990-08-03 1995-10-11 エヌオーケー株式会社 Sealing device
JPH09159033A (en) * 1995-12-11 1997-06-17 Nissan Motor Co Ltd Seal structure of oil pump for automatic transmission
JP4685248B2 (en) * 2001-02-05 2011-05-18 光洋シーリングテクノ株式会社 Oil seal
JP4296805B2 (en) * 2003-03-17 2009-07-15 Ｎｏｋ株式会社 Sealing device
JP2005220940A (en) * 2004-02-03 2005-08-18 Ntn Corp Sealing device for bearing for axle shaft
JP5583486B2 (en) * 2010-06-10 2014-09-03 Ｎｔｎ株式会社 Axle bearing device for railway vehicle

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