JP6093605B2 - Sealing device and rolling bearing device for wheel provided with sealing device - Google Patents

Sealing device and rolling bearing device for wheel provided with sealing device Download PDF

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JP6093605B2
JP6093605B2 JP2013047754A JP2013047754A JP6093605B2 JP 6093605 B2 JP6093605 B2 JP 6093605B2 JP 2013047754 A JP2013047754 A JP 2013047754A JP 2013047754 A JP2013047754 A JP 2013047754A JP 6093605 B2 JP6093605 B2 JP 6093605B2
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outer ring
flange
rolling bearing
sealing device
bearing device
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JP2014173677A (en
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雅史 桝田
雅史 桝田
良茂 笠井
良茂 笠井
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Koyo Sealing Techno Co Ltd
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Koyo Sealing Techno Co 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • 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
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Description

本発明は、車輪用転がり軸受装置が備えている内軸と外輪との間の環状空間に装着され、この環状空間に泥水（異物）が浸入するのを防ぐ密封装置及び当該密封装置を備えた車輪用転がり軸受装置に関する。   The present invention includes a sealing device that is mounted in an annular space between an inner shaft and an outer ring provided in a rolling bearing device for a wheel and prevents muddy water (foreign matter) from entering the annular space, and the sealing device. The present invention relates to a rolling bearing device for a wheel.

自動車等の車両に搭載され車輪を回転可能に支持する車輪用転がり軸受装置は、同心状に配置された径方向内側の内軸と径方向外側の外輪とを備えており、これら内軸と外輪との間に介在する転動体（玉やテーパローラ）によって、例えば、外輪に対して内軸が回転可能となる。内軸の軸方向端部には、径方向外方へ延びたフランジが設けられており、このフランジに車輪及びブレーキディスクが取り付けられる。   A wheel rolling bearing device that is mounted on a vehicle such as an automobile and rotatably supports a wheel includes a radially inner inner shaft and a radially outer outer ring arranged concentrically. For example, the inner shaft can be rotated with respect to the outer ring by the rolling elements (balls or taper rollers) interposed between the inner ring and the outer ring. A flange extending radially outward is provided at an axial end portion of the inner shaft, and a wheel and a brake disk are attached to the flange.

このような車輪用転がり軸受装置では、内軸と外輪との間に形成され転動体が配設されている環状空間に泥水（異物）が浸入するのを防ぐために、この環状空間の軸方向両端部に密封装置が装着されている。   In such a rolling bearing device for a wheel, in order to prevent muddy water (foreign matter) from entering the annular space formed between the inner shaft and the outer ring and provided with rolling elements, both ends of the annular space in the axial direction A sealing device is attached to the part.

環状空間の軸方向車両外側Ａ２の端部に装着されている密封装置１１０として、図４に示すように、外輪１０２の端部内周面１２１に嵌合している芯金１１１と、この芯金１１１に固定されているシール部材１１２とを備えたものがある。シール部材１１２は、弾性材料からなり、複数の内リップ部１３１，１３２，１３３を有している。これら内リップ部１３１，１３２，１３３は、フランジ１０８の側面（裾部側面）１０８ａ及び内軸１０３の外周面１０６ａに摺接している。
この密封装置１１０によれば、フランジ１０８の側面１０８ｂと外輪１０２の軸方向端面１２０との間の隙間Ｓを通った泥水が、転動体１０４が配設されている環状空間１０９へ浸入するのを防ぐことができる。 As shown in FIG. 4, as a sealing device 110 attached to the end portion of the outer side A <b> 2 in the axial direction of the annular space, as shown in FIG. 4, a core bar 111 fitted to the end inner peripheral surface 121 of the outer ring 102, and the core bar Some have a sealing member 112 fixed to 111. The seal member 112 is made of an elastic material and has a plurality of inner lip portions 131, 132, and 133. These inner lip portions 131, 132, 133 are in sliding contact with the side surface (hem side surface) 108 a of the flange 108 and the outer peripheral surface 106 a of the inner shaft 103.
According to this sealing device 110, the muddy water that has passed through the gap S between the side surface 108 b of the flange 108 and the axial end surface 120 of the outer ring 102 enters the annular space 109 in which the rolling elements 104 are disposed. Can be prevented.

ところで、外部から飛散してきた泥水が、フランジ１０８の側面１０８ｂと外輪１０２の軸方向端面１２０との間の隙間Ｓから浸入すると、浸入した泥水が、内リップ部１３１の径方向外方において密封装置１１０のシール部材１１２とフランジ１０８の側面１０８ａとで挟まれた小空間１００に滞留することがある。   By the way, when muddy water splashed from the outside enters from the gap S between the side surface 108b of the flange 108 and the axial end surface 120 of the outer ring 102, the muddy water that has entered the sealing device is formed radially outward of the inner lip portion 131. 110 may be retained in the small space 100 sandwiched between the seal member 112 and the side surface 108 a of the flange 108.

フランジ１０８の側面１０８ａは、内リップ部１３１のシール面（摺接面）となるが、前記のとおり泥水が小空間１００に滞留し、このシール面が泥水によって腐食すると、シール面に摺接する内リップ部１３１の摩耗が進み、密封装置１１０の寿命が低下するおそれがある。   The side surface 108a of the flange 108 serves as a sealing surface (sliding contact surface) of the inner lip portion 131. As described above, when muddy water stays in the small space 100 and the sealing surface corrodes with muddy water, the inner surface is in sliding contact with the sealing surface. The wear of the lip part 131 proceeds, and the life of the sealing device 110 may be reduced.

外輪１０２の外周面１２２は、泥水を被り易い環境にあり、外輪１０２の上側において泥水が外周面１２２上をフランジ１０８の側面１０８ｂに向かって流れることにより、フランジ１０８の側面１０８ｂと外輪１０２の軸方向端面１２０との間の隙間Ｓに浸入しやすい。   The outer peripheral surface 122 of the outer ring 102 is in an environment that is susceptible to muddy water, and the muddy water flows on the outer peripheral surface 122 toward the side surface 108b of the flange 108 on the upper side of the outer ring 102. It is easy to enter the gap S between the direction end face 120.

このため、従来の密封装置１１０のシール部材１１２は、外輪１０２の端部外周面１２２ａに外接する円筒状の外リップ部１４５を有するデフレクタ１４０を備えている。外周面１２２上をフランジ１０８の側面１０８ｂに向かって流れてくる泥水は、外リップ部１４５の軸方向端面１４５ａで堰き止めてられて外輪１０２の周方向に沿って下方へ流されることで、泥水が隙間Ｓから侵入することを抑制できるようになっている。   Therefore, the sealing member 112 of the conventional sealing device 110 includes a deflector 140 having a cylindrical outer lip portion 145 that circumscribes the outer peripheral surface 122 a of the end portion of the outer ring 102. The muddy water that flows on the outer peripheral surface 122 toward the side surface 108b of the flange 108 is blocked by the axial end surface 145a of the outer lip portion 145 and flows downward along the circumferential direction of the outer ring 102. Can be prevented from entering through the gap S.

しかし、このような外リップ部１４５をシール部材１１２に備えても泥水が隙間Ｓから侵入することを抑制するのには十分ではなく、外リップ部１４５の軸方向端面１４５ａを乗り越えた泥水が隙間Ｓから浸入することがある。外リップ部１４５の厚さを大きくする対策も考えられるが、他の部品との関係で空間的な制約があるためにサイズアップには限界がある。   However, even if such an outer lip portion 145 is provided in the seal member 112, it is not sufficient to suppress the intrusion of muddy water from the gap S, and the muddy water that has passed over the axial end surface 145a of the outer lip portion 145 becomes a gap. Intrusion from S may occur. Although measures to increase the thickness of the outer lip 145 can be considered, there is a limit to the increase in size due to a spatial restriction in relation to other parts.

本発明は、このような事情に鑑みてなされたものであり、外輪の外周面上の泥水がフランジの側面と外輪の軸方向端面との間の隙間から浸入することを抑制し、もって泥水による密封装置の寿命低下を防ぐことが可能となる密封装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and the muddy water on the outer peripheral surface of the outer ring is prevented from entering from the gap between the side surface of the flange and the axial end surface of the outer ring. It is an object of the present invention to provide a sealing device that can prevent a reduction in the service life of the sealing device.

上記目的を達成する本発明は、同心状に配置された内軸と外輪とを備え、当該外輪の軸方向端面に隙間を有して対向する側面を有したフランジが前記内軸の端部に設けられた車輪用転がり軸受装置に用いられ、前記内軸と前記外輪との間の環状空間に泥水が浸入するのを防ぐ密封装置であって、
前記外輪の端部内周面に嵌合して当該外輪に固定される円筒部及び当該円筒部から径方向外方へ延びて前記外輪の軸方向端面に当接する外円環部を有する芯金と、
前記円筒部に固定されている内固定部と、当該内固定部から延びて前記内軸に設けられているシール面に摺接する内リップ部と、を有する第１シール部と、
前記外円環部に固定されている外固定部と、当該外固定部から前記フランジの前記側面に近づく側に延びて当該側面に隙間を有して対向する環状突部、及び、前記外固定部から前記フランジの前記側面と離れる側へ延びて前記外輪の端部外周面に当接する円筒状の外リップ部とで構成されるデフレクタと、を有する第２シール部と、を備え、
前記外リップ部の先端面における少なくとも前記車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って端面溝が形成されており、
前記デフレクタの外周面における少なくとも前記車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って周面溝が形成されていることを特徴とする。 The present invention that achieves the above object includes an inner shaft and an outer ring arranged concentrically, and a flange having a side surface facing the outer ring with a gap in the axial direction end surface at the end of the inner shaft. A sealing device that is used in a provided rolling bearing device for a wheel and prevents muddy water from entering the annular space between the inner shaft and the outer ring,
A core part having a cylindrical part fitted to the inner peripheral surface of the end part of the outer ring and fixed to the outer ring, and an outer ring part extending radially outward from the cylindrical part and contacting the axial end face of the outer ring; ,
A first seal portion having an inner fixed portion fixed to the cylindrical portion, and an inner lip portion extending from the inner fixed portion and in sliding contact with a seal surface provided on the inner shaft;
An outer fixing portion fixed to the outer annular portion, an annular protrusion extending from the outer fixing portion toward the side of the flange and facing the side surface with a gap on the side surface, and the outer fixing And a second seal portion having a cylindrical outer lip portion that extends from a portion to a side away from the side surface of the flange and contacts an outer peripheral surface of the end portion of the outer ring, and
An end surface groove is formed along the circumferential direction at least on the tip surface of the outer lip portion when it is attached to the wheel rolling bearing device .
A circumferential groove is formed along the circumferential direction in at least a portion of the outer circumferential surface of the deflector that is on the upper side when attached to the wheel rolling bearing device .

本発明の密封装置は、外リップ部の先端面における少なくとも車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って端面溝が形成されている。これにより、外輪の上側において外周面上をフランジの側面に向かって流れて、外リップ部の端面溝（先端面）で堰き止められた泥水は、端面溝を乗り越えることができずにこの端面溝に沿って外輪の周方向に流れ易くなる。したがって、外輪の外周面上の泥水がフランジの側面と外輪の軸方向端面との間の隙間から浸入することを抑制し、もって泥水による密封装置の寿命低下を防ぐことができる。   In the sealing device of the present invention, an end surface groove is formed along the circumferential direction in at least a portion of the tip surface of the outer lip portion that is an upper side when attached to the wheel rolling bearing device. As a result, the muddy water flowing on the outer peripheral surface toward the side surface of the flange on the upper side of the outer ring and blocked by the end surface groove (tip surface) of the outer lip portion cannot get over the end surface groove, and this end surface groove Along the circumferential direction of the outer ring. Therefore, it is possible to prevent the muddy water on the outer peripheral surface of the outer ring from entering from the gap between the side surface of the flange and the axial end surface of the outer ring, thereby preventing the life of the sealing device from being reduced by muddy water.

前記密封装置は、前記デフレクタの外周面における少なくとも前記車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って周面溝が形成されているので、デフレクタの端面溝（先端面）を乗り越えた泥水は、周面溝内をデフレクタの周方向に沿って下方へ流れるので、この泥水がフランジの側面と外輪の軸方向端面との間の隙間から浸入することを抑制できる。 The sealing device, the upper portion serving when attached to at least the wheel rolling bearing device of the outer peripheral surface of the deflector, since the circumferential surface groove along the circumferential direction are formed, the deflector end surface groove ( Since the muddy water that has passed over the tip surface flows downward in the circumferential groove along the circumferential direction of the deflector, the muddy water can be prevented from entering from the gap between the side surface of the flange and the axial end surface of the outer ring. .

前記密封装置は、前記外リップ部の先端部の内周部に、径方向内方に突出して前記外輪の端部外周面に当接する環状の凸部が軸方向に少なくとも２カ所形成されていることが好ましい。
この場合、軸方向に少なくとも２カ所形成されている凸部により、外リップ部の端面溝（先端面）で堰き止められた泥水が外リップ部と外輪の間に浸入することを抑制すると共に水の浸入により発生した錆が外輪の軸方向端面側に進行することをくい止めることができる。 In the sealing device, at least two annular convex portions that protrude radially inward and abut against the outer peripheral surface of the end portion of the outer ring are formed on the inner peripheral portion of the distal end portion of the outer lip portion in the axial direction. It is preferable.
In this case, at least two convex portions formed in the axial direction prevent the muddy water blocked by the end face groove (tip surface) of the outer lip portion from entering between the outer lip portion and the outer ring and water. It is possible to prevent the rust generated by the intrusion of water from proceeding to the axial end face side of the outer ring.

また、本発明は、同心状に配置された内軸と外輪とを備え、当該外輪の軸方向端面に隙間を有して対向する側面を有したフランジが前記内軸の端部に設けられており、前記いずれかの密封装置が前記外輪に固定されている車輪用転がり軸受装置であって、
前記側面に角部が形成されており、前記環状突部の先端部の内周縁と前記角部との径方向位置が揃っていることを特徴とする車輪用転がり軸受装置である。 The present invention also includes an inner shaft and an outer ring arranged concentrically, and a flange having a side surface facing the outer ring with a gap in the axial direction end surface is provided at the end of the inner shaft. A rolling bearing device for a wheel in which any one of the sealing devices is fixed to the outer ring,
The rolling bearing device for wheels is characterized in that a corner portion is formed on the side surface, and radial positions of the inner peripheral edge of the tip portion of the annular protrusion and the corner portion are aligned.

本発明の車輪用転がり軸受装置は、フランジの側面に角部が形成されており、デフレクタを構成する環状突部の先端部の内周縁と前記角部との径方向位置が揃っている。これにより、デフレクタの外周面上を通過してフランジの側面に降りかかった泥水を、遠心力により径方向外方へ飛ばし易くすることができ、この泥水がフランジの側面と外輪の軸方向端面との間の隙間から浸入することを抑制できる。また、車両下側において、フランジの側面と外輪の軸方向端面との間の隙間に水が滞留することを防止できる。   In the rolling bearing device for a wheel of the present invention, a corner is formed on the side surface of the flange, and the radial positions of the inner peripheral edge of the tip of the annular protrusion constituting the deflector and the corner are aligned. As a result, the muddy water that has passed over the outer peripheral surface of the deflector and has fallen on the side surface of the flange can be easily blown radially outward by centrifugal force, and this muddy water can be easily removed from the side surface of the flange and the axial end surface of the outer ring. It is possible to suppress the intrusion from the gap between the two. Further, it is possible to prevent water from staying in the gap between the side surface of the flange and the axial end surface of the outer ring on the vehicle lower side.

本発明によれば、外輪の外周面上の泥水がフランジの側面と外輪の軸方向端面との間の隙間から浸入することを抑制して、もって泥水による密封装置の寿命低下を防ぐことができる。   According to the present invention, it is possible to prevent muddy water on the outer peripheral surface of the outer ring from entering from the gap between the side surface of the flange and the axial end surface of the outer ring, thereby preventing a decrease in the service life of the sealing device due to muddy water. .

本発明の一実施形態に係る密封装置が装着されている車輪転がり軸受装置の断面説明図である。It is a section explanatory view of the wheel rolling bearing device with which the sealing device concerning one embodiment of the present invention is equipped. 本発明の一実施形態に係る密封装置の断面説明図である。It is a section explanatory view of the sealing device concerning one embodiment of the present invention. 水通過量測定試験の様子を示す概略図である。It is the schematic which shows the mode of a water passage amount measurement test. 従来の密封装置の断面説明図である。It is sectional explanatory drawing of the conventional sealing device.

以下、本発明の密封装置及び車輪用転がり軸受の実施形態を図面に基づいて説明する。
図１は、本発明の密封装置１０が用いられている車輪用転がり軸受装置１の一実施形態を示す断面説明図である。また、図２は、図１における密封装置１０の断面説明図である。図２では、外輪２及び内軸３（フランジ８及び軸本体部６）を二点鎖線により示している。図１に示すように、車輪用転がり軸受装置１（以下、単に「軸受装置」ともいう。）は、自動車の車体に設けられている懸架装置に対して車輪を回転可能に支持するためのものであり、径方向外側の外輪２と径方向内側の内軸３とを備えている。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a sealing device and a wheel rolling bearing according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view showing an embodiment of a wheel rolling bearing device 1 in which a sealing device 10 of the present invention is used. 2 is a cross-sectional explanatory view of the sealing device 10 in FIG. In FIG. 2, the outer ring 2 and the inner shaft 3 (the flange 8 and the shaft main body 6) are indicated by a two-dot chain line. As shown in FIG. 1, a rolling bearing device 1 for a wheel (hereinafter also simply referred to as a “bearing device”) is for rotatably supporting a wheel with respect to a suspension device provided on a vehicle body of an automobile. The outer ring 2 on the radially outer side and the inner shaft 3 on the radially inner side are provided.

外輪２は円筒形状の部材であり、車体側の懸架装置の一部５０に固定される。
内軸３は、軸本体部６と、この軸本体部６の車両内側Ａ１の端部に外嵌して固定されている環状の内輪部材７とを有している。外輪２と内軸３との間には２列でかつ各列に複数の玉４が介在している。外輪２と内軸３とは同心状に配置され、本実施形態では、外輪２に対して内軸３が回転自在となる。また、この軸受装置１は、複数の玉４を保持する保持器５を備えている。 The outer ring 2 is a cylindrical member and is fixed to a part 50 of the suspension device on the vehicle body side.
The inner shaft 3 includes a shaft main body portion 6 and an annular inner ring member 7 that is fitted and fixed to an end portion of the shaft main body portion 6 on the vehicle inner side A1. There are two rows between the outer ring 2 and the inner shaft 3, and a plurality of balls 4 are interposed in each row. The outer ring 2 and the inner shaft 3 are arranged concentrically, and in this embodiment, the inner shaft 3 is rotatable with respect to the outer ring 2. The bearing device 1 also includes a cage 5 that holds a plurality of balls 4.

なお、軸本体部６に対する内輪部材７の組み立てに関して説明すると、軸本体部６の端部に内輪部材７を外嵌させてから、軸本体部６の最端部（かしめ加工前は円筒形状の部分）を径方向外側へ広げるように塑性変形させる加工（かしめ加工）を行うことにより、図１の形態とされる。   The assembly of the inner ring member 7 with respect to the shaft main body 6 will be described. After the inner ring member 7 is fitted on the end of the shaft main body 6, the outermost end of the shaft main body 6 (before the caulking process is cylindrical) By performing a process (caulking process) for plastic deformation so that the portion is expanded radially outward, the configuration shown in FIG. 1 is obtained.

内軸３の車両外側Ａ２の端部には、車輪及びブレーキディスク（図示せず）を取り付けるためのフランジ８が設けられている。このフランジ８が有する一方の側面２８の一部は、外輪２の軸方向端面２０と、隙間Ｓを有して対向している。なお、本実施形態の軸受装置１では、フランジ８が形成されている側が車両外側Ａ２となり、内輪部材７が取り付けられている側が車両内側Ａ１となる。   A flange 8 for attaching a wheel and a brake disk (not shown) is provided at the end of the inner shaft 3 on the vehicle outer side A2. A part of one side surface 28 of the flange 8 is opposed to the axial end surface 20 of the outer ring 2 with a gap S therebetween. In the bearing device 1 of the present embodiment, the side on which the flange 8 is formed is the vehicle outer side A2, and the side on which the inner ring member 7 is attached is the vehicle inner side A1.

以上の構成により、軸受装置１は、複列のアンギュラ玉軸受を構成し、図示しない車輪及びブレーキディスクをフランジ８において固定した内軸３を、車両に対して回転可能に支持することができる。
ここで、フランジ８の側面２８を詳細に説明する。図２に示すように、側面２８は、軸本体部６の外周面６ａと滑らかに連続する第１側面２８ａと、この第１側面２８ａの径方向外方において第１側面２８ａよりも車両外側Ａ２に設けられている第２側面２８ｂと、この第２側面２８ｂの径方向外方において第２側面２８ｂよりもさらに車両外側２Ａに設けられている第３側面２８ｃとを有している。第１側面２８ａと第２側面２８ｂとの間には鈍角の角部２９ａが形成されている。また、第２側面２８ｂと第３側面２８ｃとの間には略直角の角部２９ｂが形成されており、フランジ８の側面２８は第２側面２８ｂと第３側面２８ｃとの間に外周面２８ｄを有している。 With the above configuration, the bearing device 1 constitutes a double-row angular ball bearing, and can support the inner shaft 3 on which a wheel and a brake disk (not shown) are fixed at the flange 8 so as to be rotatable with respect to the vehicle.
Here, the side surface 28 of the flange 8 will be described in detail. As shown in FIG. 2, the side surface 28 includes a first side surface 28 a smoothly continuous with the outer peripheral surface 6 a of the shaft main body 6, and a vehicle outer side A <b> 2 outside the first side surface 28 a in the radial direction outward of the first side surface 28 a. And a third side surface 28c provided further on the vehicle outer side 2A than the second side surface 28b on the outer side in the radial direction of the second side surface 28b. An obtuse angle portion 29a is formed between the first side surface 28a and the second side surface 28b. Further, a substantially right-angled corner 29b is formed between the second side surface 28b and the third side surface 28c, and the side surface 28 of the flange 8 has an outer peripheral surface 28d between the second side surface 28b and the third side surface 28c. have.

外輪２の軸方向両端部と内軸３との間には、密封装置１０，６０が取り付けられている。これら密封装置１０，６０によって、外輪２の径方向外側から、外輪２と内軸３との間に形成される環状空間９に、泥水（異物）が浸入するのを防ぐ。そして、これら密封装置１０，６０のうち、車両外側Ａ２の密封装置１０に、以下の実施形態に係る密封装置が用いられている。
密封装置１０は、外輪２の軸方向一端部に固定されている円環状の芯金１１と、この芯金１１に取り付けられた第１シール部１３及び第２シール部１４を有するシール部材１２とを備えている。 Sealing devices 10 and 60 are attached between the axial ends of the outer ring 2 and the inner shaft 3. These sealing devices 10 and 60 prevent muddy water (foreign matter) from entering the annular space 9 formed between the outer ring 2 and the inner shaft 3 from the outer side in the radial direction of the outer ring 2. Of these sealing devices 10 and 60, the sealing device according to the following embodiment is used for the sealing device 10 on the vehicle outer side A2.
The sealing device 10 includes an annular cored bar 11 fixed to one end of the outer ring 2 in the axial direction, and a seal member 12 having a first seal part 13 and a second seal part 14 attached to the cored bar 11. It has.

芯金１１は、ＳＰＣＣ等の鋼板をプレス加工することによって環状に形成されており、外輪２の端部内周面２１に嵌合して外輪２に固定されている円筒部１６と、この円筒部１６の軸方向車両外側Ａ２の端部から径方向外方へ延びて外輪２の軸方向端面２０に当接する外円環部１７とを有している。さらに、芯金１１は、円筒部１６の軸方向車両内側Ａ１の端部に連続する屈曲部１８と、この屈曲部１８から径方向内方へ延びている内円環部１９とを有している。   The core metal 11 is formed in an annular shape by pressing a steel plate such as SPCC, and the cylindrical portion 16 fitted to the end inner peripheral surface 21 of the outer ring 2 and fixed to the outer ring 2, and the cylindrical portion The outer ring portion 17 extends radially outward from the end of the sixteen axial vehicle outer sides A2 and contacts the axial end surface 20 of the outer ring 2. Further, the core metal 11 has a bent portion 18 that is continuous with the end portion of the cylindrical portion 16 on the inner side A1 in the axial direction, and an inner annular portion 19 that extends radially inward from the bent portion 18. Yes.

外円環部１７は、外輪２の軸方向端面２０に当接することで、密封装置１０全体を軸方向に関して位置決めする。また、外円環部１７は、軸方向端面２０に当接した状態で、フランジ８の側面２８と、シール部材１２の一部（後述の外固定部３５の本体部３５ａ）を挟んで、対向した配置となる。   The outer annular portion 17 contacts the axial end surface 20 of the outer ring 2 to position the entire sealing device 10 in the axial direction. Further, the outer annular portion 17 is opposed to the side surface 28 of the flange 8 and a part of the seal member 12 (a main body portion 35a of the outer fixing portion 35 described later) in a state where the outer annular portion 17 is in contact with the axial end surface 20. Will be arranged.

シール部材１２は、ニトリルゴム等の弾性材を円環状に形成したものであり、芯金１１に加硫接着している。シール部材１２のうち、第１シール部１３は、芯金１１の円筒部１６、屈曲部１８及び内円環部１９に固定されている部分であり、また、第２シール部１４は、芯金１１の外円環部１７に固定されている部分及びその径方向外側の部分である。なお、本実施形態では、第１シール部１３と第２シール部１４とは一体である。   The seal member 12 is formed of an elastic material such as nitrile rubber in an annular shape, and is vulcanized and bonded to the core metal 11. Of the seal member 12, the first seal portion 13 is a portion fixed to the cylindrical portion 16, the bent portion 18 and the inner ring portion 19 of the core metal 11, and the second seal portion 14 is a core metal. 11 is a portion fixed to the outer ring portion 17 and a radially outer portion thereof. In the present embodiment, the first seal portion 13 and the second seal portion 14 are integral.

シール部材１２を詳細に説明すると、第１シール部１３は、円筒部１６、屈曲部１８及び内円環部１９に固定されている内固定部３０と、この内固定部３０から内軸３に向かって延びている内リップ部３１，３２，３３とを有している。そして、内リップ部３１，３２，３３は、内軸３に設けられているシール面に摺接する。   The seal member 12 will be described in detail. The first seal portion 13 includes an inner fixed portion 30 fixed to the cylindrical portion 16, the bent portion 18 and the inner annular portion 19, and the inner fixed portion 30 to the inner shaft 3. It has inner lip portions 31, 32, 33 extending toward the surface. The inner lip portions 31, 32, 33 are in sliding contact with the seal surface provided on the inner shaft 3.

本実施形態では、第１の内リップ部３１が摺接するシール面は、フランジ８の側面２８（第１側面２８ａ）であり、第２及び第３の内リップ部３２，３３が摺接するシール面は、軸本体部６の外周面６ａである。これら内リップ部３１，３２，３３は、外輪２の径方向外方（つまり、外部）の泥水、砂、小石等の異物が浸入するのを防止する機能、及び、環状空間９に設けられている玉４用の潤滑剤が外部へ漏れるのを防止する機能を有している。   In the present embodiment, the sealing surface with which the first inner lip portion 31 is in sliding contact is the side surface 28 (first side surface 28a) of the flange 8, and the sealing surface with which the second and third inner lip portions 32, 33 are in sliding contact. Is the outer peripheral surface 6 a of the shaft body 6. These inner lip portions 31, 32, and 33 are provided in the annular space 9 and the function of preventing foreign matter such as muddy water, sand, and pebbles from entering the outer ring 2 in the radial direction (that is, outside). It has a function to prevent the lubricant for the ball 4 from leaking out.

第２シール部１４は、芯金１１の外円環部１７に固定されている外固定部３５と、この外固定部３５と一体であるデフレクタ４０とを有している。
ここで、芯金１１の外円環部１７は、外輪２の軸方向端面２０に接触している当接部１７ａと、この当接部１７ａが軸方向端面２０に接触した状態で当該軸方向端面２０に非接触となる非当接部１７ｂとを有している。なお、非当接部１７ｂは、当接部１７ａに比べて厚さが薄くなっており、素材を切削することによって薄い非当接部１７ｂを形成してもよく、又は、プレス加工によって当接部１７ａと非当接部１７ｂとを形成してもよい。 The second seal portion 14 includes an outer fixing portion 35 that is fixed to the outer ring portion 17 of the core metal 11 and a deflector 40 that is integral with the outer fixing portion 35.
Here, the outer ring portion 17 of the metal core 11 is in contact with the axial end surface 20 of the outer ring 2, and the axial direction with the contact portion 17 a in contact with the axial end surface 20. The end surface 20 has a non-contact portion 17b that is non-contact. Note that the non-contact portion 17b is thinner than the contact portion 17a, and the non-contact portion 17b may be formed by cutting the material, or may be contacted by pressing. The part 17a and the non-contact part 17b may be formed.

そして、第２シール部１４の外固定部３５は、外円環部１７（当接部１７ａ及び非当接部１７ｂ）よりもフランジ８側の本体部３５ａと、非当接部１７ｂと軸方向端面２０との間の密封部３５ｂとを有している。密封部３５ｂは、芯金１１の当接部１７ａよりも軸方向に（外輪２側へ）突出した環状の凸部３５ｂ−１と、その径方向両側に設けられ当接部１７ａよりも凹んでいる環状の凹部３５ｂ−２，３５ｂ−３とを有している。
芯金１１の当接部１７ａが軸方向端面２０に当接した状態で、凸部３５ｂ−１は押圧されて軸方向端面２０と密着する。そして、凹部３５ｂ−２，３５ｂ−３は、凸部３５ｂ−１の押圧による非圧縮変形を妨げない機能を有する。 Further, the outer fixing portion 35 of the second seal portion 14 includes the body portion 35a on the flange 8 side of the outer ring portion 17 (the contact portion 17a and the non-contact portion 17b), the non-contact portion 17b, and the axial direction. It has the sealing part 35b between the end surfaces 20. FIG. The sealing portion 35b includes an annular convex portion 35b-1 that protrudes in the axial direction (to the outer ring 2 side) from the contact portion 17a of the core metal 11, and is recessed from the contact portion 17a provided on both radial sides thereof. And annular recesses 35b-2 and 35b-3.
In a state where the contact portion 17 a of the core metal 11 is in contact with the axial end surface 20, the convex portion 35 b-1 is pressed and comes into close contact with the axial end surface 20. And the recessed parts 35b-2 and 35b-3 have a function which does not prevent the non-compression deformation by the press of the convex part 35b-1.

第２シール部１４のデフレクタ４０は、外固定部３５の径方向外側の端部から軸方向のフランジ８の側面２８に近づく側に延びる環状突部４１と、外固定部３５の径方向外側の端部から軸方向のフランジ８の側面２８と離れる側へ延びる外リップ部４５とで構成されている。デフレクタ４０は、数ミリ程度の厚さを有する円筒状に形成されている。   The deflector 40 of the second seal portion 14 includes an annular protrusion 41 that extends from the radially outer end of the outer fixing portion 35 toward the side closer to the side surface 28 of the axial flange 8, and a radially outer side of the outer fixing portion 35. It is comprised from the side part 28 of the flange 8 of the axial direction from the edge part, and the outer lip part 45 extended to the side which leaves | separates. The deflector 40 is formed in a cylindrical shape having a thickness of about several millimeters.

デフレクタ４０の環状突部４１は、環状に形成されており、その先端部４２がフランジ８の側面２８と隙間を有して対向している。先端部４２の内周縁４２ａは、側面２８の第２角部２９ｂと径方向位置が揃えられている。環状突部４１の内部には、芯金１１が存在していない。   The annular protrusion 41 of the deflector 40 is formed in an annular shape, and the tip 42 thereof faces the side surface 28 of the flange 8 with a gap. The inner peripheral edge 42 a of the distal end portion 42 is aligned with the second corner portion 29 b of the side surface 28 in the radial direction. The cored bar 11 is not present inside the annular protrusion 41.

密封装置１０を外輪２に装着した状態で、先端部４２の内周縁４２ａと側面２８の第２角部２９ｂとの軸方向の間隔は、例えば１．０ｍｍ程度である。この程度の間隔を生じさせることで、高速回転（例えば１０００ｒｐｍ）時において、その内周面はこの先端部４２の内周縁４２ａとフランジ８の第２角部２９ｂとの間付近に表面張力による水の膜が形成され、この水の膜により泥水が内リップ部３１側へ浸入するのを防ぐことができる。
さらに、デフレクタ４０の外リップ部４５は、円筒状（環状）に形成されており、外輪２の端部外周面２２ａに当接している。外リップ部４５の内部には、環状突部４１と同様に、芯金１１が存在していない。 In a state where the sealing device 10 is mounted on the outer ring 2, the axial interval between the inner peripheral edge 42a of the tip end portion 42 and the second corner portion 29b of the side surface 28 is, for example, about 1.0 mm. By generating such an interval, at the time of high-speed rotation (for example, 1000 rpm), the inner peripheral surface is water between the inner peripheral edge 42a of the tip portion 42 and the second corner portion 29b of the flange 8 due to surface tension. This film can prevent muddy water from entering the inner lip portion 31 side.
Further, the outer lip portion 45 of the deflector 40 is formed in a cylindrical shape (annular shape), and is in contact with the outer peripheral surface 22 a of the end portion of the outer ring 2. As with the annular protrusion 41, the core metal 11 does not exist inside the outer lip portion 45.

外リップ部４５の先端面、すなわちデフレクタ４０における軸方向の車両内側Ａ１の端面には、端面溝４６が形成されている。本実施形態における端面溝４６は、外リップ部４５の周方向に沿って全周に亘って設けられている。端面溝４６は、軸方向の車両外側Ａ２に向かって凹状に形成されており、例えば深さ０．１〜１．０ｍｍ程度、幅数ｍｍ程度に形成されている。   An end surface groove 46 is formed on the front end surface of the outer lip portion 45, that is, the end surface of the deflector 40 on the vehicle inner side A <b> 1 in the axial direction. The end surface groove 46 in the present embodiment is provided over the entire circumference along the circumferential direction of the outer lip portion 45. The end surface groove 46 is formed in a concave shape toward the vehicle outer side A2 in the axial direction, and is formed to have a depth of about 0.1 to 1.0 mm and a width of about several mm, for example.

また、デフレクタ４０の外周面には、周面溝４７が軸方向に等間隔に複数（図示例では５つ）形成されている。本実施形態における周面溝４７は、外リップ部４５の周方向に沿って全周に亘って設けられている。周面溝４７は、径方向内側に向かって凹状に形成されており、例えば半径０．１〜１．０ｍｍ程度で深さ０．１〜０．６ｍｍ程度の断面円弧形状に形成されている。   A plurality (five in the illustrated example) of circumferential grooves 47 are formed on the outer circumferential surface of the deflector 40 at equal intervals in the axial direction. The circumferential groove 47 in the present embodiment is provided over the entire circumference along the circumferential direction of the outer lip portion 45. The circumferential groove 47 is formed in a concave shape toward the inside in the radial direction, and is formed, for example, in a circular arc shape with a radius of about 0.1 to 1.0 mm and a depth of about 0.1 to 0.6 mm.

そして、この外リップ部４５の先端部の内周部に、外リップ部４５の基部の内周面よりも径方向内方に突出して外輪２の端部外周面２２ａに当接する環状の凸部４８が軸方向に２カ所形成されている。外リップ部４５の先端側に配設されている第１凸部４８ａと基端側に配設されている第２凸部４８ｂとの間には、外リップ部４５の基部の内周面よりも径方向外方に入りこんでいる環状の凹部４９ａが形成されている。また、第１凸部４８ａよりも先端側にはテーパ部４９ｂが形成されている。さらに、第２凸部４８ｂよりも外リップ部４５の基端側の部分には、端部外周面２２ａとの間に隙間が形成されている。これにより、第１凸部４８ａ及び第２凸部４８ｂを端部外周面２２ａに全周に亘って線接触させることができ、密封性能を高めることが可能となる。そして、凹部４９ａ、テーパ部４９ｂ、及び前記隙間は、第１凸部４８ａ及び第２凸部４８ｂの押圧による非圧縮変形を妨げない機能を有する。   Then, an annular convex portion that protrudes radially inward from the inner peripheral surface of the base portion of the outer lip portion 45 and contacts the outer peripheral surface 22a of the outer ring 2 at the inner peripheral portion of the distal end portion of the outer lip portion 45. 48 are formed in two places in the axial direction. From the inner peripheral surface of the base portion of the outer lip portion 45 between the first convex portion 48a disposed on the distal end side of the outer lip portion 45 and the second convex portion 48b disposed on the proximal end side. Is also formed with an annular recess 49a that extends radially outward. Further, a tapered portion 49b is formed on the tip side of the first convex portion 48a. Furthermore, a gap is formed between the end rim portion 45a and the outer peripheral surface 22a at a portion closer to the base end side of the outer lip portion 45 than the second convex portion 48b. Thereby, the 1st convex part 48a and the 2nd convex part 48b can be line-contacted to the edge part outer peripheral surface 22a over a perimeter, and it becomes possible to improve sealing performance. And the recessed part 49a, the taper part 49b, and the said clearance gap have a function which does not prevent the non-compressive deformation by the press of the 1st convex part 48a and the 2nd convex part 48b.

上述のように、実施形態に係る密封装置１０は、外リップ部４５の先端面に周方向に沿って端面溝４６が形成されている。これにより、外輪２の上側において外周面２２上をフランジ８の側面２８に向かって流れて、外リップ部４５の端面溝４６（先端面）で堰き止められた泥水は、端面溝４６を乗り越えることができずにこの端面溝４６に沿って外輪２の周方向に流れ易くなる。したがって、外輪２の外周面２２上の泥水がフランジ８の側面２８と外輪２の軸方向端面２０との間の隙間Ｓから浸入することを抑制し、もって泥水による密封装置１０の寿命低下を防ぐことができる。   As described above, in the sealing device 10 according to the embodiment, the end surface groove 46 is formed in the distal end surface of the outer lip portion 45 along the circumferential direction. As a result, the muddy water that flows on the outer peripheral surface 22 toward the side surface 28 of the flange 8 on the upper side of the outer ring 2 and is blocked by the end surface groove 46 (tip surface) of the outer lip portion 45 gets over the end surface groove 46. It becomes easy to flow along the end surface groove 46 in the circumferential direction of the outer ring 2 without being able to be formed. Therefore, the muddy water on the outer peripheral surface 22 of the outer ring 2 is prevented from entering from the gap S between the side surface 28 of the flange 8 and the axial end surface 20 of the outer ring 2, thereby preventing the life of the sealing device 10 from being reduced by muddy water. be able to.

また、密封装置１０は、デフレクタ４０の外周面に周方向に沿って環状の周面溝４７が形成されている。これにより、デフレクタ４０の端面溝４６（先端面）を乗り越えた泥水は、周面溝４７内をデフレクタ４０の周方向に沿って下方へ流れるので、この泥水が隙間Ｓから浸入することを抑制できる。   Further, in the sealing device 10, an annular peripheral groove 47 is formed on the outer peripheral surface of the deflector 40 along the circumferential direction. Accordingly, the muddy water that has passed over the end surface groove 46 (tip surface) of the deflector 40 flows downward in the circumferential groove 47 along the circumferential direction of the deflector 40, so that the muddy water can be prevented from entering from the gap S. .

また、密封装置１０は、外リップ部４５の先端部の内周部に、径方向内方に突出して外輪２の端部外周面２２ａに当接する環状の凸部４８が軸方向に２カ所形成されている。これにより、外リップ部４５の端面溝４６（先端面）で堰き止められた泥水が外リップ部４５と外輪２の間に浸入することを抑制すると共に水の浸入により発生した錆が外輪２の軸方向端面２０側に進行することをくい止めることができる。   Further, in the sealing device 10, two annular convex portions 48 that protrude radially inward and abut against the outer peripheral surface 22 a of the end portion of the outer ring 2 are formed in two axial directions on the inner peripheral portion of the distal end portion of the outer lip portion 45. Has been. As a result, the muddy water blocked by the end surface groove 46 (tip surface) of the outer lip portion 45 is prevented from entering between the outer lip portion 45 and the outer ring 2 and rust generated by the intrusion of water is reduced in the outer ring 2. Proceeding to the axial end face 20 side can be prevented.

また、実施形態に係る車輪用転がり軸受装置１は、フランジ８の側面２８に角部２９ｂが形成されており、デフレクタ４０を構成する環状突部４１の先端部４２の内周縁４２ａと前記角部２９ｂとの径方向位置が揃っている。これにより、フランジ８の側面２８は外周面２８ｄを有しており、この外周面２８ｄに対してデフレクタ４０の外周面上を通過した泥水が降りかかる。そして、外周面２８ｄに降りかかった泥水は遠心力により径方向外方へ飛ばされるので、泥水がフランジ８の側面２８と外輪２の軸方向端面２０との間の隙間Ｓから浸入することを抑制できる。また、車両下側において、隙間Ｓから水が抜けやすくなり、隙間Ｓに水が滞留することを防止できる。   Further, in the wheel rolling bearing device 1 according to the embodiment, a corner portion 29 b is formed on the side surface 28 of the flange 8, and the inner peripheral edge 42 a of the tip end portion 42 of the annular protrusion 41 constituting the deflector 40 and the corner portion. The radial position with 29b is aligned. Thereby, the side surface 28 of the flange 8 has the outer peripheral surface 28d, and the muddy water that has passed on the outer peripheral surface of the deflector 40 falls on the outer peripheral surface 28d. Since the muddy water that has fallen on the outer peripheral surface 28d is blown radially outward by centrifugal force, the muddy water is prevented from entering from the gap S between the side surface 28 of the flange 8 and the axial end surface 20 of the outer ring 2. it can. Further, water can easily escape from the gap S on the vehicle lower side, and water can be prevented from staying in the gap S.

以下に示す実施例１〜３及び比較例の密封装置について水通過量測定試験を行った。
（実施例１）
デフレクタの厚さが２．０ｍｍ、デフレクタの軸方向寸法が５．１ｍｍ、端面溝の深さが０．２ｍｍ、端面溝の幅が１．４ｍｍ、周面溝の半径が０．２ｍｍ、周面溝の深さが０．１ｍｍ、周面溝は軸方向に等間隔に５つ設けられている密封装置。
（実施例２）
周面溝が設けられていないこと以外は実施例１と同様の密封装置。
（実施例３）
端面溝が設けられていないこと以外は実施例１と同様の密封装置。
（比較例）
端面溝及び周面溝が設けられていないこと以外は実施例１と同様の密封装置。 A water passage amount measurement test was performed on the sealing devices of Examples 1 to 3 and Comparative Example shown below.
Example 1
Deflector thickness is 2.0mm, deflector axial dimension is 5.1mm, end face groove depth is 0.2mm, end face groove width is 1.4mm, peripheral groove radius is 0.2mm, peripheral surface A sealing device having a groove depth of 0.1 mm and five circumferential grooves provided at equal intervals in the axial direction.
(Example 2)
A sealing device similar to that of Example 1 except that the peripheral groove is not provided.
(Example 3)
A sealing device similar to that of Example 1 except that no end face groove is provided.
(Comparative example)
A sealing device similar to that of Example 1 except that the end surface groove and the peripheral surface groove are not provided.

［水通過量測定試験］
図３は、水通過量測定試験の様子を示す概略図である。図３に示すように、水通過量測定試験は、注水ノズル２００から模擬外輪２Ａの上部の外周面２２Ａにデフレクタ４０Ａに向かって注水し、デフレクタ４０Ａを通過して通過水受け３００に流入する水の量を測定することで行った。注水量を３００ｍｌ／ｍｉｎとして測定した。測定は各実施例及び比較例ごとに３回ずつ行い水通過量の平均値を求めた。その結果を表１に示す。 [Water passing amount measurement test]
FIG. 3 is a schematic view showing a state of the water passage amount measurement test. As shown in FIG. 3, in the water passage amount measurement test, water is injected from the water injection nozzle 200 onto the outer peripheral surface 22A of the upper portion of the simulated outer ring 2A toward the deflector 40A, passes through the deflector 40A, and flows into the passing water receiver 300. This was done by measuring the amount of. The amount of water injection was measured at 300 ml / min. The measurement was performed three times for each example and comparative example, and the average value of the amount of water passing was obtained. The results are shown in Table 1.

Figure 0006093605

表１に示すように、実施例１〜３の密封装置は、注水量３００ｍｌ／ｍｉｎにおいて、端面溝及び周面溝が設けられていない比較例の密封装置と比較して水通過量が低減することを確認できた。
Figure 0006093605
As shown in Table 1, in the sealing devices of Examples 1 to 3, the water passage amount is reduced at a water injection amount of 300 ml / min as compared with the sealing device of the comparative example in which the end surface grooves and the peripheral surface grooves are not provided. I was able to confirm that.

１：車輪用転がり軸受装置、２：外輪、３：内軸、６ａ，２８ａ：シール面、８：フランジ、９：環状空間、１０：密封装置、１１：芯金、１３：第１シール部、１４：第２シール部、１６：円筒部、１７：外円環部、２０：外輪の軸方向端面、２１：外輪の端部内周面、２２ａ：外輪の端部外周面、２８：側面、２９ａ：角部、３０：内固定部、３１，３２，３３：内リップ部、３５：外固定部、４０：デフレクタ、４１：環状突部、４２：環状突部の先端部、４２ａ：内周縁、４５：外リップ部、４６：端面溝、４７：周面溝、４８：凸部、Ｓ：隙間   1: rolling bearing device for wheel, 2: outer ring, 3: inner shaft, 6a, 28a: sealing surface, 8: flange, 9: annular space, 10: sealing device, 11: cored bar, 13: first sealing part, 14: second seal portion, 16: cylindrical portion, 17: outer ring portion, 20: axial end surface of outer ring, 21: inner peripheral surface of end portion of outer ring, 22a: outer peripheral surface of end portion of outer ring, 28: side surface, 29a : Corner part, 30: inner fixing part, 31, 32, 33: inner lip part, 35: outer fixing part, 40: deflector, 41: annular protrusion, 42: tip part of annular protrusion, 42a: inner peripheral edge, 45: outer lip, 46: end face groove, 47: circumferential groove, 48: convex part, S: gap

Claims (3)

同心状に配置された内軸と外輪とを備え、当該外輪の軸方向端面に隙間を有して対向する側面を有したフランジが前記内軸の端部に設けられた車輪用転がり軸受装置に用いられ、前記内軸と前記外輪との間の環状空間に泥水が浸入するのを防ぐ密封装置であって、
前記外輪の端部内周面に嵌合して当該外輪に固定される円筒部及び当該円筒部から径方向外方へ延びて前記外輪の軸方向端面に当接する外円環部を有する芯金と、
前記円筒部に固定されている内固定部と、当該内固定部から延びて前記内軸に設けられているシール面に摺接する内リップ部と、を有する第１シール部と、
前記外円環部に固定されている外固定部と、当該外固定部から前記フランジの前記側面に近づく側に延びて当該側面に隙間を有して対向する環状突部、及び、前記外固定部から前記フランジの前記側面と離れる側へ延びて前記外輪の端部外周面に当接する円筒状の外リップ部とで構成されるデフレクタと、を有する第２シール部と、を備え、
前記外リップ部の先端面における少なくとも前記車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って端面溝が形成されており、
前記デフレクタの外周面における少なくとも前記車輪用転がり軸受装置に取り付けられたときに上側となる部分に、周方向に沿って周面溝が形成されていることを特徴とする車輪用転がり軸受装置。 A rolling bearing device for a wheel provided with a flange having an inner shaft and an outer ring arranged concentrically and having side surfaces facing each other with a gap in an axial end surface of the outer ring. A sealing device used to prevent muddy water from entering the annular space between the inner shaft and the outer ring,
A core part having a cylindrical part fitted to the inner peripheral surface of the end part of the outer ring and fixed to the outer ring, and an outer ring part extending radially outward from the cylindrical part and contacting the axial end face of the outer ring; ,
A first seal portion having an inner fixed portion fixed to the cylindrical portion, and an inner lip portion extending from the inner fixed portion and in sliding contact with a seal surface provided on the inner shaft;
An outer fixing portion fixed to the outer annular portion, an annular protrusion extending from the outer fixing portion toward the side of the flange and facing the side surface with a gap on the side surface, and the outer fixing And a second seal portion having a cylindrical outer lip portion that extends from a portion to a side away from the side surface of the flange and contacts an outer peripheral surface of the end portion of the outer ring, and
An end surface groove is formed along the circumferential direction at least on the tip surface of the outer lip portion when it is attached to the wheel rolling bearing device .
A wheel rolling bearing device according to claim 1, wherein a circumferential groove is formed along a circumferential direction in at least a portion of the outer peripheral surface of the deflector which is an upper side when attached to the wheel rolling bearing device. 前記外リップ部の先端部の内周部に、径方向内方に突出して前記外輪の端部外周面に当接する環状の凸部が軸方向に少なくとも２カ所形成されている請求項１に記載の密封装置。 The inner peripheral portion of the distal end portion of the outer lip portion, wherein the end portion outer peripheral surface of the outer ring protruding radially inwards to claim 1 where the convex portion of the abutting annular is at least two locations formed in the axial direction Sealing device. 同心状に配置された内軸と外輪とを備え、当該外輪の軸方向端面に隙間を有して対向する側面を有したフランジが前記内軸の端部に設けられており、請求項１若しくは２に記載の密封装置が前記外輪に固定されている車輪用転がり軸受装置であって、
前記側面に角部が形成されており、前記環状突部の先端部の内周縁と前記角部との径方向位置が揃っていることを特徴とする車輪用転がり軸受装置。 And a shaft and the outer ring inner concentrically disposed, a flange having opposing sides with a clearance in the axial direction end surface of the outer ring is provided at an end portion of the inner shaft, according to claim 1 or 2 is a rolling bearing device for a wheel in which the sealing device according to 2 is fixed to the outer ring,
The rolling bearing device for a wheel according to claim 1, wherein a corner portion is formed on the side surface, and radial positions of the inner peripheral edge of the tip portion of the annular protrusion and the corner portion are aligned.
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