JP5715171B2

JP5715171B2 - Bearing sealing device and wheel bearing

Info

Publication number: JP5715171B2
Application number: JP2013027365A
Authority: JP
Inventors: 鳥居　晃; 晃鳥居
Original assignee: NTN Corp
Current assignee: NTN Corp
Priority date: 2013-02-15
Filing date: 2013-02-15
Publication date: 2015-05-07
Anticipated expiration: 2027-11-09
Also published as: JP2013100918A

Description

この発明は、自動車等における車輪用軸受等の軸受に用いられる軸受密封装置および車輪用軸受に関する。 The present invention relates to a bearing sealing device and a wheel bearing used for a bearing such as a wheel bearing in an automobile or the like.

トラックなどの車両は、乗用車と比較してライフサイクル期間内での走行距離が長く、１００万Ｋｍ以上走行する。このような車両の場合、これに搭載される車輪用軸受の寿命向上だけでなく、その車輪用軸受の軸受空間の端部に設けられる軸受密封装置のシール性能の寿命向上も望まれている。そこで、この種の軸受密封装置として、図１２に示すように、軸受内輪に取付けられる断面Ｌ字状のシール板８２と、このシール板８２の外径側に立ち上がる立板部８２ｂに対して、径方向に並んで摺動自在に接する２枚のサイドリップ８３ａ，８３ｂを有し、軸受外輪に取付けられる芯金付きの弾性シール部材８３とでなり、耐泥水性能向上を図ったものが提案されている（例えば特許文献１）。 A vehicle such as a truck has a longer travel distance within a life cycle period than a passenger car, and travels 1 million km or more. In the case of such a vehicle, it is desired not only to improve the life of the wheel bearing mounted on the vehicle, but also to improve the life of the seal performance of the bearing sealing device provided at the end of the bearing space of the wheel bearing. Therefore, as this type of bearing sealing device, as shown in FIG. 12, with respect to a sealing plate 82 having an L-shaped cross section attached to the bearing inner ring and a standing plate portion 82b rising on the outer diameter side of the sealing plate 82, It has two side lips 83a and 83b that are slidably in contact with each other in the radial direction, and is composed of an elastic seal member 83 with a cored bar that is attached to the bearing outer ring. (For example, Patent Document 1).

特開２００７−９９３８号公報JP 2007-9938 A

上記したように、軸受密封装置に２枚のサイドリップ８３ａ，８３ｂを設けると、従来の一般的な軸受密封装置に比べて耐泥水性能は２倍程度増加するが、トラックなどの走行距離を考えた場合は、さらなる耐泥水性能が求められる。 As described above, when the two side lips 83a and 83b are provided in the bearing sealing device, the anti-muddy water performance is increased about twice as compared with the conventional general bearing sealing device. In such a case, further muddy water resistance is required.

この発明の目的は、重量増加を招くことなく耐泥水性能を向上させることができる軸受密封装置およびこれを備えた車輪用軸受を提供することである。 An object of the present invention is to provide a bearing sealing device capable of improving the muddy water resistance performance without causing an increase in weight and a wheel bearing provided with the same.

この発明の軸受密封装置は、
軸受における互いに転動体を介して相対回転する外方部材と内方部材の間の軸受空間の端部に設置される軸受密封装置であって、
前記内方部材および外方部材にそれぞれ取付けられて互いに対向する環状のシール板および弾性シール部材からなり、
前記シール板は、前記内方部材の外周に嵌合する円筒部およびこの円筒部の端部から立ち上がる立板部からなる断面Ｌ字状の金属製とされ、
前記弾性シール部材は、環状の芯金およびこの芯金に固着された弾性体からなり、
前記芯金は前記外方部材の内周面に嵌合する円筒部およびこの円筒部の端部から立ち下がる立板部を有し前記シール板と対向する断面Ｌ字状とされ、
前記弾性体は、互いに前記芯金の径方向の内外に並びそれぞれ先端が前記シール板の立板部に接する２枚のサイドリップと、軸方向に並び前記シール板の外周面に縮径付勢手段で縮径付勢されることなく先端がそれぞれ接触する２枚のラジアルリップとを有し、
前記２枚のサイドリップは、前記芯金から斜め外径側へ延び、
内径側のサイドリップは、前記２枚のラジアルリップのうちの１枚の先端から前記シール板の立板部に接する内径側のサイドリップの先端まで中間に屈曲部分のない１本の線状に延びてこのラジアルリップと一体のシールリップを構成する。 The bearing sealing device of the present invention comprises:
A bearing sealing device installed at an end of a bearing space between an outer member and an inner member that rotate relative to each other via rolling elements in the bearing,
An annular seal plate and an elastic seal member, which are respectively attached to the inner member and the outer member and face each other,
The seal plate is made of a metal having an L-shaped cross section composed of a cylindrical portion fitted to the outer periphery of the inner member and a standing plate portion rising from an end portion of the cylindrical portion,
The elastic seal member is composed of an annular cored bar and an elastic body fixed to the cored bar,
The cored bar has a cylindrical portion that fits to the inner peripheral surface of the outer member and a standing plate portion that falls from an end portion of the cylindrical portion, and has an L-shaped cross section facing the seal plate,
The elastic body is arranged on the inside and outside in the radial direction of the cored bar, and two side lips whose tips are in contact with the standing plate portion of the seal plate, and on the outer peripheral surface of the seal plate arranged in the axial direction and a two radial lip tip you contact each without being reduced径付biased by means,
The two side lips extend obliquely from the cored bar toward the outer diameter side,
The side lip on the inner diameter side is a single line having no bent portion in the middle from the tip of one of the two radial lips to the tip of the side lip on the inner diameter side in contact with the standing plate portion of the seal plate. It extends to form a seal lip integrated with the radial lip.

この構成によると、シール板の立板部に接する２枚のサイドリップと、シール板の外周面に先端がそれぞれ接触する２枚のラジアルリップとを有するため、優れた耐泥水性能が得られる。また、内径側のサイドリップは、前記２枚のラジアルリップのうちの１枚の先端から延びて一体のシールリップを構成するため、軸受密封装置のシールリップ構造を簡略化でき、そのため密封装置断面高さを１５mm以下に抑えるのが容易となる。 According to this configuration, since it has the two side lip in contact with the standing portion of the seal plate, and two radial sealing edge on the outer circumferential surface you contact each sealing plate, resulting excellent muddy water performance . Further, since the side lip on the inner diameter side extends from the tip of one of the two radial lips to form an integral seal lip, the seal lip structure of the bearing sealing device can be simplified, so that the cross-section of the sealing device can be simplified. It becomes easy to keep the height below 15 mm.

この発明の軸受密封装置において、前記２枚のラジアルリップのうちの前記シール板の立板部から遠い方のラジアルリップは、前記シール板の立板部と反対側へ斜め内径側に延びるものであっても良い。 In the bearing sealing device according to the present invention, the radial lip farther from the standing plate portion of the seal plate of the two radial lips extends toward the inner diameter side obliquely toward the opposite side of the standing plate portion of the seal plate. There may be.

この発明の軸受密封装置において、前記軸受密封装置における前記シール板の内径面から、前記弾性シール部材の外径面までの径方向長さである密封装置断面高さを、９〜１５mmとしても良い。
密封装置の断面高さを９〜１５mmとしているので、重量増加を招くことなく耐泥水性能を向上させることができる。密封装置断面高さを９mmより低くすると、上記２枚のサイドリップおよび２枚のラジアルリップを有する構造の軸受密封装置が成り立たず、１５mmより高くすると、軸受の径方向寸法が大きくなって軸受の重量増加を招くので好ましくない。 In the bearing sealing device of the present invention, the sealing device cross-sectional height, which is the radial length from the inner diameter surface of the seal plate in the bearing sealing device to the outer diameter surface of the elastic seal member, may be 9 to 15 mm. .
Since the cross-sectional height of the sealing device is 9 to 15 mm, muddy water resistance can be improved without causing an increase in weight. If the cross-sectional height of the sealing device is lower than 9 mm, the bearing sealing device having the structure having the two side lips and the two radial lips cannot be established. If the height is higher than 15 mm, the radial dimension of the bearing becomes large and the bearing This is not preferable because it increases the weight.

この発明の軸受密封装置は、前記軸受が互いに複列の転動体を介して相対回転する外方部材と内方部材を備えた車輪用軸受である軸受密封装置であっても良い。
この発明において、この軸受密封装置を装備する車輪用軸受は複列の円すいころ軸受型であっても良い。例えば、トラック用等の車輪用軸受であっても良い。 The bearing sealing device according to the present invention may be a bearing sealing device that is a wheel bearing including an outer member and an inner member that rotate relative to each other via double row rolling elements.
In the present invention, the wheel bearing equipped with the bearing sealing device may be a double row tapered roller bearing type. For example, a wheel bearing for a truck or the like may be used.

この発明において、この軸受密封装置を装備する車輪用軸受は複列の玉軸受型であっても良い。例えば、一般乗用車用等の車輪用軸受であっても良い。 In the present invention, the wheel bearing equipped with the bearing sealing device may be a double row ball bearing type. For example, a wheel bearing for a general passenger car may be used.

この発明において、この軸受密封装置を装備する車輪用軸受は、前記外方部材が、外周にホイール取付用または車体への取付用のフランジを有するものであっても良い。すなわち、第２世代型および第３，第４世代型の車輪用軸受であっても良い。 In this invention, in the wheel bearing equipped with the bearing sealing device, the outer member may have a flange for wheel attachment or attachment to the vehicle body on the outer periphery. That is, the second generation type and the third and fourth generation type wheel bearings may be used.

この発明において、この軸受密封装置を装備する車輪用軸受は、前記内方部材が、ホイール取付用のハブフランジおよび軸部を有するハブ輪と、このハブ輪の軸部のインボード側端の外周に嵌合した内輪とでなり、前記ハブ輪および前記内輪に、前記転動体が転走する各列の転走面を有するものであっても良い。すなわち、第３世代型の車輪用軸受であっても良い。 According to the present invention, in the wheel bearing equipped with the bearing sealing device, the inner member includes a hub wheel having a hub flange and a shaft portion for wheel mounting, and an outer periphery of an inboard side end of the shaft portion of the hub wheel. The hub ring and the inner ring may have rolling surfaces in each row on which the rolling elements roll. That is, it may be a third generation type wheel bearing.

この発明において、この軸受密封装置を装備する車輪用軸受は、前記内方部材が、ホイール取付用のハブフランジおよび軸部を有するハブ輪と、等速自在継手の外側継手部材とでなり、この外側継手部材のステム部が前記ハブ輪に結合され、前記ハブ輪および前記外側継手部材に、前記転動体が転走する各列の転走面を有するものとしても良い。すなわち、第４世代型の車輪用軸受であっても良い。 In the present invention, in the wheel bearing equipped with the bearing sealing device, the inner member includes a hub wheel having a hub flange and a shaft portion for wheel mounting, and an outer joint member of a constant velocity universal joint. The stem portion of the outer joint member may be coupled to the hub wheel, and the hub wheel and the outer joint member may have rolling surfaces of each row on which the rolling elements roll. That is, it may be a fourth generation type wheel bearing.

この発明の車輪用軸受は、互いに複列の転動体を介して相対回転する外方部材と内方部材を有し、これら外方部材と内方部材の間の軸受空間の端部に軸受密封装置を有し、車体に対し車輪を支持する車輪用軸受において、前記軸受密封装置にこの発明の軸受密封装置を用いたものである。 The wheel bearing according to the present invention has an outer member and an inner member that rotate relative to each other via double row rolling elements, and a bearing seal is provided at the end of the bearing space between the outer member and the inner member. In a wheel bearing having a device and supporting a wheel with respect to a vehicle body, the bearing sealing device of the present invention is used for the bearing sealing device.

この発明の軸受密封装置は、互いに転動体を介して相対回転する外方部材と内方部材の間の軸受空間の端部に設置される軸受密封装置であって、
前記内方部材および外方部材にそれぞれ取付けられて互いに対向する環状のシール板および弾性シール部材からなり、前記シール板は、前記内方部材の外周に嵌合する円筒部およびこの円筒部の端部から立ち上がる立板部からなる断面Ｌ字状の金属製とされ、前記弾性シール部材は、環状の芯金およびこの芯金に固着された弾性体からなり、前記芯金は前記外方部材の内周面に嵌合する円筒部およびこの円筒部の端部から立ち下がる立板部を有し前記シール板と対向する断面Ｌ字状とされ、前記弾性体は、互いに前記芯金の径方向の内外に並びそれぞれ先端が前記シール板の立板部に接する２枚のサイドリップと、軸方向に並び前記シール板の外周面に縮径付勢手段で縮径付勢されることなく先端がそれぞれ接触する２枚のラジアルリップとを有し、前記２枚のサイドリップは、前記芯金から斜め外径側へ延び、内径側のサイドリップは、前記２枚のラジアルリップのうちの１枚の先端から前記シール板の立板部に接する内径側のサイドリップの先端まで中間に屈曲部分のない１本の線状に延びてこのラジアルリップと一体のシールリップを構成するため、重量増加を招くことなく耐泥水性能を向上させることができる。 A bearing sealing device of the present invention is a bearing sealing device installed at an end portion of a bearing space between an outer member and an inner member that rotate relative to each other via rolling elements,
An annular seal plate and an elastic seal member that are respectively attached to the inner member and the outer member and face each other. The seal plate is fitted to the outer periphery of the inner member, and an end of the cylindrical portion. It is made of a metal having an L-shaped cross section consisting of a standing plate portion rising from the portion, the elastic seal member is made of an annular cored bar and an elastic body fixed to the cored bar, and the cored bar is made of the outer member It has a cylindrical portion that fits to the inner peripheral surface and a standing plate portion that falls from the end portion of the cylindrical portion, and has an L-shaped cross section that faces the seal plate. of the two side lips each tip line is in contact with the standing portion of the seal plate in and out, the tip without being reduced径付biased by contraction径付biasing means on the outer peripheral surface of the arrangement the sealing plate in the axial direction two radial lip and contact each The two side lips extend obliquely from the core to the outer diameter side, and the inner diameter side lip extends from the tip of one of the two radial lips to the upright portion of the seal plate To improve the muddy water resistance without causing an increase in weight because the seal lip is integrated with the radial lip by extending in a single line without a bent portion in the middle to the tip of the side lip on the inner diameter side in contact with Can do.

この発明の車輪用軸受は、互いに複列の転動体を介して相対回転する外方部材と内方部材を有し、これら外方部材と内方部材の間の軸受空間の端部に軸受密封装置を有し、車体に対し車輪を支持する車輪用軸受において、前記軸受密封装置にこの発明の軸受密封装置を用いたものであるため、重量増加を招くことなく耐泥水性能を向上させることができる。 The wheel bearing according to the present invention has an outer member and an inner member that rotate relative to each other via double row rolling elements, and a bearing seal is provided at the end of the bearing space between the outer member and the inner member. In a wheel bearing having a device and supporting a wheel with respect to a vehicle body, the bearing sealing device of the present invention is used for the bearing sealing device, so that the muddy water resistance can be improved without increasing the weight. it can.

提案例にかかる軸受密封装置を装備した車輪用軸受の断面図である。It is sectional drawing of the bearing for wheels equipped with the bearing sealing device concerning a proposal example. 同車輪用軸受に設けられた軸受密封装置の一構成例の断面図である。It is sectional drawing of the example of 1 structure of the bearing sealing device provided in the bearing for the wheels. 他の提案例にかかる軸受密封装置の断面図である。It is sectional drawing of the bearing sealing apparatus concerning another proposal example. この発明の一実施形態にかかる軸受密封装置の断面図である。It is sectional drawing of the bearing sealing device concerning one Embodiment of this invention. 提案例にかかる実施形態にかかる軸受密封装置の断面図である。It is sectional drawing of the bearing sealing apparatus concerning embodiment concerning a proposal example . 図１の車輪用軸受に図３の軸受密封装置を設けた例を示す断面図である。It is sectional drawing which shows the example which provided the bearing sealing device of FIG. 3 in the wheel bearing of FIG. 提案例にかかる軸受密封装置を装備した他の車輪用軸受の断面図である。It is sectional drawing of the other wheel bearing equipped with the bearing sealing device concerning a proposal example. 提案例にかかる軸受密封装置を装備したさらに他の車輪用軸受の断面図である。It is sectional drawing of the further another wheel bearing equipped with the bearing sealing device concerning a proposal example. 提案例にかかる軸受密封装置を装備したさらに他の車輪用軸受の断面図である。It is sectional drawing of the further another wheel bearing equipped with the bearing sealing device concerning a proposal example. 提案例にかかる軸受密封装置を装備したさらに他の車輪用軸受の断面図である。It is sectional drawing of the further another wheel bearing equipped with the bearing sealing device concerning a proposal example. 提案例にかかる軸受密封装置を装備したさらに他の車輪用軸受の断面図である。It is sectional drawing of the further another wheel bearing equipped with the bearing sealing device concerning a proposal example. 従来の軸受密封装置の断面図である。It is sectional drawing of the conventional bearing sealing device.

この発明に関係する提案例に係る軸受密封装置を装備した車輪用軸受の一例を図１ないし図５に基づいて説明する。この提案例は、第１世代型に分類される複列の円すいころ軸受型の車輪用軸受に適用したものである。なお、この明細書において、車両に取付けた状態で車両の車幅方向外側寄りとなる側をアウトボード側と言い、車両の中央寄りとなる側をインボード側と呼ぶ。
この車輪用軸受２０は、互いに複列の転動体２３を介して相対回転する外方部材２１と内方部材２２とを備え、車体に対して車輪を回転自在に支持するようにしたものである。転動体２３は円すいころからなり、外方部材２１の内周に形成された互いに小径側が隣合う複列の円すい状の転走面２４と、これら転走面２４にそれぞれ対向して内方部材２２の外周に形成された複列の円すい状の転走面２５との間に介在する。内方部材２２は、２つの軸受内輪２２Ａを軸方向に並べた分割型内輪からなる。転動体２３は各列毎に保持器２６で保持されている。ここでは、外方部材２１が固定側部材とされ、内方部材２２が回転側部材とされる。外方部材２１と内方部材２２の間の軸受空間の両端は、軸受密封装置１，１１によりそれぞれ密封されている。 An example of a wheel bearing equipped with a bearing sealing device according to a proposed example related to the present invention will be described with reference to FIGS. This proposed example is applied to a double row tapered roller bearing type wheel bearing classified as a first generation type. In this specification, the side closer to the outer side in the vehicle width direction of the vehicle when attached to the vehicle is referred to as the outboard side, and the side closer to the center of the vehicle is referred to as the inboard side.
The wheel bearing 20 includes an outer member 21 and an inner member 22 that rotate relative to each other via double row rolling elements 23, and rotatably supports the wheel with respect to the vehicle body. . The rolling element 23 is formed of a tapered roller, and is formed on the inner periphery of the outer member 21. Double row conical rolling surfaces 24 adjacent to each other on the small diameter side, and the inner members facing the rolling surfaces 24 respectively. It is interposed between double-row conical rolling surfaces 25 formed on the outer periphery of 22. The inner member 22 is a split inner ring in which two bearing inner rings 22A are arranged in the axial direction. The rolling elements 23 are held by a holder 26 for each row. Here, the outer member 21 is a fixed member, and the inner member 22 is a rotating member. Both ends of the bearing space between the outer member 21 and the inner member 22 are sealed by bearing sealing devices 1 and 11, respectively.

車輪用軸受２０のインボード側端に設けられる軸受密封装置１は、図２に示すように、前記内方部材２２および外方部材２１にそれぞれ取付けられて互いに対向する環状のシール板２および弾性シール部材３からなる。シール板２はスリンガとなる部材であって、内方部材２２の外周面に嵌合する円筒部２ａと、この円筒部２ａの端部から立ち上がる立板部２ｂとからなる断面Ｌ字状の金属製とされる。弾性シール部材３は、環状の芯金４に弾性体５を固着したものである。芯金４は、外方部材２１の内周面に嵌合する円筒部４ａと、この円筒部４ａの端部から立ち下がる立板部４ｂとを有し、前記シール板２と軸方向に対向する断面逆Ｌ字状とされている。弾性体５は、芯金４の内側を覆って設けられたものであり、２枚のサイドリップ５ａ，５ｂと、２枚のラジアルリップ５ｃ，５ｄとを有する。２枚のサイドイップ５ａ，５ｂは、互いに芯金４の径方向の内外に並んで配置され、芯金４の立板部４ｂから斜め外径側へ延びて、それぞれ先端が前記シール板２の立板部２ｂに接する。サイドリップ５ａ，５ｂは外部からの泥水浸入防止用である。１枚のラジアルリップ５ｃも泥水浸入防止用であり、芯金４の立板部４ｂの先端からシール板２の立板部２ｂ側へ斜め内径側へ延びて、先端が前記シール板２の円筒部２ａに接する。もう１枚のラジアルリップ５ｄはグリース漏れ防止用であり、芯金４の立板部４ｂの先端からシール板２の立板部２ｂと反対側へ斜め内径側へ延びて、先端が前記シール板２の円筒部２ａに接する。シール板２の内径面から、弾性シール部材３の外径面までの径方向長さである密封装置断面高さＨは、９〜１５mmとされている。 As shown in FIG. 2, the bearing sealing device 1 provided at the inboard side end of the wheel bearing 20 is attached to the inner member 22 and the outer member 21, respectively, and the annular seal plate 2 and the elastic member facing each other. It consists of a seal member 3. The seal plate 2 is a member that becomes a slinger, and is a metal having an L-shaped cross section that includes a cylindrical portion 2a that fits to the outer peripheral surface of the inner member 22 and a standing plate portion 2b that rises from an end of the cylindrical portion 2a. It is made. The elastic seal member 3 is obtained by fixing an elastic body 5 to an annular cored bar 4. The core metal 4 has a cylindrical portion 4a fitted to the inner peripheral surface of the outer member 21, and a standing plate portion 4b that falls from the end of the cylindrical portion 4a, and is opposed to the seal plate 2 in the axial direction. The cross section has an inverted L shape. The elastic body 5 is provided so as to cover the inner side of the cored bar 4, and has two side lips 5a and 5b and two radial lips 5c and 5d. The two side lips 5a and 5b are arranged side by side in the radial direction of the cored bar 4, extend from the standing plate part 4b of the cored bar 4 to the oblique outer diameter side, and the tip of each of the side plates 5a and 5b of the seal plate 2 It contacts the upright plate portion 2b. The side lips 5a and 5b are for preventing muddy water from entering from the outside. One radial lip 5c is also for preventing muddy water intrusion, and extends from the tip of the standing plate portion 4b of the cored bar 4 toward the standing plate portion 2b side of the sealing plate 2 toward the inner diameter side, and the tip is a cylinder of the sealing plate 2 It contacts the part 2a. Another radial lip 5d is for preventing grease leakage, and extends from the tip of the upright plate portion 4b of the core metal 4 to the side opposite to the upright plate portion 2b of the seal plate 2 toward the oblique inner diameter side, and the tip is the seal plate. 2 is in contact with the cylindrical portion 2a. The sealing device cross-sectional height H, which is the radial length from the inner diameter surface of the seal plate 2 to the outer diameter surface of the elastic seal member 3, is 9 to 15 mm.

このように、上記構成の車輪用軸受２０では、その軸受空間のインボード側端に設けられる軸受密封装置１における密封装置断面高さＨを９〜１５mmとしているので、耐泥水性能を向上させることができる。密封装置断面高さＨを９mmより低くすると、上記２枚のサイドリップ５ａ，５ｂおよび２枚のラジアルリップ５ｃ，５ｄを有する構造の軸受密封装置１が成り立たないし、１５mmより高くすると、車輪用軸受２０の径方向寸法が大きくなって車輪用軸受２０の重量増加を招くので好ましくない。すなわち、この車輪用軸受装置２０によると、重量増加を招くことなく耐泥水性能を向上させることができる。なお、図１の車輪用軸受２０では、軸受空間のインボード側端だけを図２の構造の軸受密封装置１で密封しているが、軸受空間のアウトボード側端も同じ軸受密封装置１で密封するようにしても良い。一般的には、車輪用軸受において、インボード側端は、泥水等がかかり易い箇所となるが、アウトボード側端は泥水等がかかり難いため、アウトボード側端の密封装置１１は簡易な構成のもので足りる。 Thus, in the wheel bearing 20 having the above-described configuration, the sealing device cross-sectional height H in the bearing sealing device 1 provided at the inboard side end of the bearing space is set to 9 to 15 mm, so that the muddy water resistance is improved. Can do. If the height H of the sealing device is lower than 9 mm, the bearing sealing device 1 having the structure having the two side lips 5a and 5b and the two radial lips 5c and 5d does not hold. This is not preferable because the radial dimension of 20 increases and the weight of the wheel bearing 20 increases. That is, according to the wheel bearing device 20, the muddy water resistance can be improved without causing an increase in weight. 1, only the inboard side end of the bearing space is sealed with the bearing sealing device 1 having the structure of FIG. 2, but the outboard side end of the bearing space is also sealed with the same bearing sealing device 1. It may be sealed. In general, in the wheel bearing, the inboard side end is a place where the muddy water or the like is easily applied, but the outboard side end is difficult to receive the muddy water or the like. It ’s enough.

図３は、前記軸受密封装置１の他の構成例を示す。この構成例では、図２の構成例において、２枚のラジアルリップ５ｃ，５ｄのうち、シール板２の立板部２ｂ側へ延びる１枚のラジアルリップ５ｃに、縮径付勢するリング状ばね部材６が設けられている。リング状ばね部材６には、ガータスプリング等が用いられる。その他の構成は、図２の構成例の場合と同様である。図１の車輪用軸受２０において、インボード側端の軸受密封装置１を図３の構成例のものに置き換えた例を図６に示す。 FIG. 3 shows another configuration example of the bearing sealing device 1. In this configuration example, in the configuration example of FIG. 2, of the two radial lips 5 c and 5 d, one radial lip 5 c extending toward the standing plate portion 2 b side of the seal plate 2 is ring-shaped spring that biases the diameter of the ring spring. A member 6 is provided. A garter spring or the like is used for the ring-shaped spring member 6. Other configurations are the same as those in the configuration example of FIG. FIG. 6 shows an example in which the bearing sealing device 1 at the inboard side end in the wheel bearing 20 of FIG. 1 is replaced with the configuration example of FIG.

このように、ラジアルリップ５ｃに縮径付勢するリング状ばね部材６が設けられた構成では、シール板２の円筒部２ａへのラジアルリップ５ｃの接触が強められると共に、車両への軸受取り付け時の偏芯によるラジアルリップ５ｃのリップ追従性が増すので、ラジアルリップ５ｃによる泥水浸入防止効果がさらに高まる。 As described above, in the configuration in which the radial lip 5c is provided with the ring-shaped spring member 6 that urges the diameter of the radial lip 5c, the radial lip 5c contacts the cylindrical portion 2a of the seal plate 2 and the bearing is attached to the vehicle. Since the lip followability of the radial lip 5c due to the eccentricity of is increased, the effect of preventing the muddy water from entering by the radial lip 5c is further enhanced.

図４は、この発明の一実施形態にかかる軸受密封装置１を示す。この実施形態は、図２の構成例において、２枚のサイドリップ５ａ，５ｂのうち、内径側のサイドリップ５ｂを、２枚のラジアルリップ５ｃ，５ｄのうち、シール板２の立板部２ｂ側へ延びる１枚のラジアルリップ５ｃの先端から延びて一体のシールリップを構成するように形成している。その他の構成は、図２の構成例の場合と同様である。 FIG. 4 shows a bearing sealing device 1 according to an embodiment of the present invention. In this embodiment, in the configuration example of FIG. 2, the side lip 5b on the inner diameter side of the two side lips 5a and 5b is used, and the standing plate portion 2b of the seal plate 2 of the two radial lips 5c and 5d. It is formed so as to extend from the tip of one radial lip 5c extending to the side to constitute an integral seal lip. Other configurations are the same as those in the configuration example of FIG.

このように、内径側のサイドリップ５ｂを、ラジアルリップ５ｃの先端から延びて一体のシールリップを構成するように形成した場合には、軸受密封装置１のシールリップ構造を簡略化できるので、密封装置断面高さＨを１５mm以下に抑えるのが容易となる。 In this way, when the side lip 5b on the inner diameter side is formed to extend from the tip of the radial lip 5c so as to constitute an integral seal lip, the seal lip structure of the bearing sealing device 1 can be simplified. It becomes easy to suppress the apparatus cross-sectional height H to 15 mm or less.

図５は、提案例にかかる軸受密封装置を示す。この提案例では、図４の例で示した、前記サイドリップ５ｂとラジアルリップ５ｃとが一体となったシールリップに、縮径付勢するリング状ばね部材６が設けられている。その他の構成は、図４の実施形態の場合と同様である。 FIG. 5 shows a bearing sealing device according to the proposed example . In this proposed example , the ring-shaped spring member 6 that biases the diameter is provided on the seal lip in which the side lip 5b and the radial lip 5c are integrated as shown in the example of FIG. Other configurations are the same as those in the embodiment of FIG.

このように、内径側のサイドリップ５ｂを、ラジアルリップ５ｃの先端から延びて一体のシールリップを構成するように形成すると共に、一体のシールリップに縮径付勢するリング状ばね部材６を設けた場合には、軸受密封装置１のシールリップ構造を簡略化できて密封装置断面高さＨを１５mm以下に抑えることが容易になると共に、シール板２の立板部２ｂおよび円筒部２ａへのサイドリップ５ｂおよびラジアルリップ５ｃの接触が強められ、車両への軸受取り付け時の偏芯によるラジアルリップ５ｃのリップ追従性が増すので、泥水浸入防止効果がさらに高まる。 In this way, the side lip 5b on the inner diameter side is formed so as to form an integral seal lip extending from the tip of the radial lip 5c, and the ring-shaped spring member 6 is provided to reduce the diameter of the integral seal lip. In this case, the seal lip structure of the bearing sealing device 1 can be simplified, and the sealing device cross-sectional height H can be easily suppressed to 15 mm or less, and the seal plate 2 can be connected to the standing plate portion 2b and the cylindrical portion 2a. The contact between the side lip 5b and the radial lip 5c is strengthened, and the lip following ability of the radial lip 5c due to the eccentricity when the bearing is attached to the vehicle is increased, so that the muddy water intrusion preventing effect is further enhanced.

図７は、車輪用軸受の他の例を示す。この車輪用軸受３０は、第１世代型に分類される複列外向きアンギュラ玉軸受型とされている。すなわち、この車輪用軸受３０は、図１に示す車輪用軸受２０における転動体２３をボールに置き換えたものであり、内外の部材２２，２１間に形成される環状空間の両端が一対の軸受密封装置１，１で密封されている。ここでは、インボード側およびアウトボード側の軸受密封装置１として、図２の構成例のものが用いられている。内方部材２２が、２つの軸受内輪２２Ａを軸方向に並べた分割型内輪からなることも、図１の例の場合と同様である。 FIG. 7 shows another example of the wheel bearing. The wheel bearing 30 is a double row outward angular ball bearing type classified as a first generation type. That is, the wheel bearing 30 is obtained by replacing the rolling elements 23 in the wheel bearing 20 shown in FIG. 1 with balls, and both ends of an annular space formed between the inner and outer members 22 and 21 are sealed with a pair of bearings. It is sealed with devices 1 and 1. Here, as the bearing sealing device 1 on the inboard side and the outboard side, the configuration example of FIG. 2 is used. The inner member 22 is composed of a split inner ring in which two bearing inner rings 22A are arranged in the axial direction as in the example of FIG.

図８は、車輪用軸受のさらに他の例を示す。この車輪用軸受４０は、第２世代型に分類される複列外向きアンギュラ玉軸受型であり、外輪回転タイプでかつ従動輪支持用のものである。この車輪用軸受４０は、内周に複列の転走面４４を有するハブ輪兼用の外方部材４１と、これら転走面４４にそれぞれ対向する転走面４５を有する内方部材４２と、これら複列の転走面４４，４５間に介在する複列の転動体４３とを備える。外方部材４１は、外周にホイール取付用のハブフランジ４１ａを有する。このハブフランジ４１ａには、ブレーキロータを介してホイール（いずれも図示せず）がハブボルト３７で取付けられる。内方部材４２は各転走面４５をそれぞれ有する２つの軸受内輪４２Ａ，４２Ａを軸方向に並べた分割型内輪からなる。内方部材４２の内径面には車軸（図示せず）が固定される。転動体４３はボールからなり、各列毎に保持器４６で保持されている。内外の部材４２，４１間に形成される環状空間の両端が一対の軸受密封装置１，１２で密封されている。インボード側の軸受密封装置１として、図２の構成例のものが用いられている。 FIG. 8 shows still another example of the wheel bearing. The wheel bearing 40 is a double-row outward angular ball bearing type classified as a second generation type, and is an outer ring rotating type and a driven wheel supporting type. The wheel bearing 40 includes a hub wheel outer member 41 having double-row rolling surfaces 44 on the inner periphery, and an inner member 42 having rolling surfaces 45 respectively facing the rolling surfaces 44. A double row rolling element 43 interposed between the double row rolling surfaces 44 and 45 is provided. The outer member 41 has a hub flange 41a for wheel attachment on the outer periphery. A wheel (not shown) is attached to the hub flange 41a with a hub bolt 37 via a brake rotor. The inner member 42 includes a split inner ring in which two bearing inner rings 42A and 42A each having a rolling surface 45 are arranged in the axial direction. An axle (not shown) is fixed to the inner diameter surface of the inner member 42. The rolling element 43 is formed of a ball and is held by a holder 46 for each row. Both ends of the annular space formed between the inner and outer members 42 and 41 are sealed with a pair of bearing sealing devices 1 and 12. 2 is used as the bearing sealing device 1 on the inboard side.

図９は、車輪用軸受のさらに他の例を示す。この車輪用軸受５０は、第２世代型に分類される複列円すいころ軸受型であり、内輪回転タイプでかつ駆動輪支持用のものである。この車輪用軸受５０は、内周に複列の転走面５４を有する外方部材５１と、これら転走面５４にそれぞれ対向する転走面５５を有する内方部材５２と、これら複列の転走面５４，５５間に介在する複列の転動体５３とを備える。転動体５３は円すいころからなり、各列毎に保持器５６で保持されている。外方部材５１は固定側の部材となるものであって、車体の懸架装置を構成するナックル（図示せず）に取付けるフランジ５１ａを外周に有し、全体が一体の部品とされている。内方部材５２は回転側の部材となるものであって、ハブ輪５７とその外周に嵌合する一対の分割型の内輪５８Ａ，５８Ｂとでなり、これら一対の内輪５８Ａ，５８Ｂに各列の転走面５５が形成される。ハブ輪５７は、外周にホイール取付用のハブフランジ５７ａを有する。このハブフランジ５７ａには、ブレーキロータを介してホイール（いずれも図示せず）がハブボルト３７で取付けられる。ハブ輪５７の軸部５７ｂのインボード側端は加締部５７ｃとされ、この加締部５７ｃが内輪５８Ｂの幅面に押し当てられる。ハブ輪５７は中央孔５９を有し、この中央孔５９にアウトボード側の等速自在継手（図示せず）の外側継手部材が、スプライン嵌合により連結される。内外の部材５２，５１間に形成される環状空間の両端が、図２の構成例の軸受密封装置１で密封されている。 FIG. 9 shows still another example of the wheel bearing. The wheel bearing 50 is a double-row tapered roller bearing type classified as a second generation type, and is an inner ring rotating type and for driving wheel support. The wheel bearing 50 includes an outer member 51 having double-row rolling surfaces 54 on the inner periphery, an inner member 52 having rolling surfaces 55 respectively facing the rolling surfaces 54, and the double-row rolling members 54. And a double row rolling element 53 interposed between the rolling surfaces 54 and 55. The rolling element 53 is formed of a tapered roller and is held by a cage 56 for each row. The outer member 51 is a member on the fixed side, and has a flange 51a attached to a knuckle (not shown) constituting the suspension device of the vehicle body on the outer periphery, and the whole is an integral part. The inner member 52 is a member on the rotation side, and includes a hub ring 57 and a pair of split inner rings 58A and 58B fitted to the outer periphery thereof. The inner rings 58A and 58B are arranged in each row. A rolling surface 55 is formed. The hub wheel 57 has a hub flange 57a for wheel attachment on the outer periphery. A wheel (not shown) is attached to the hub flange 57a with a hub bolt 37 via a brake rotor. The inboard side end of the shaft portion 57b of the hub wheel 57 is a crimping portion 57c, and this crimping portion 57c is pressed against the width surface of the inner ring 58B. The hub wheel 57 has a central hole 59, and an outer joint member of a constant velocity universal joint (not shown) on the outboard side is connected to the central hole 59 by spline fitting. Both ends of the annular space formed between the inner and outer members 52 and 51 are sealed with the bearing sealing device 1 having the configuration example of FIG.

図１０は、車輪用軸受のさらに他の例を示す。この車輪用軸受６０は、第３世代型に分類される複列外向きアンギュラ玉軸受型であり、内輪回転タイプでかつ駆動輪支持用のものである。この車輪用軸受６０は、内周に複列の転走面６４を有する外方部材６１と、これら転走面６４にそれぞれ対向する転走面６５を有する内方部材６２と、これら複列の転走面６４，６５間に介在する複列の転動体６３とを備える。外方部材６１は固定側の部材となるものであって、車体の懸架装置（図示せず）におけるナックルに取付けるフランジ６１ａを外周に有し、全体が一体の部品とされている。内方部材６２は回転側の部材となるものであって、外周にホイール取付用のハブフランジ６７ａを有するハブ輪６７と、このハブ輪６７の軸部６７ｂのインボード側端の外周に嵌合した内輪６８とでなる。これらハブ輪６７および内輪６８に前記各列の転走面６５が形成されている。転動体６３はボールからなり、各列毎に保持器６６で保持されている。内外の部材６２，６１間に形成される環状空間の両端が一対の軸受密封装置１，１３で密封されている。インボード側の軸受密封装置１として、図２の構成例のものが用いられている。 FIG. 10 shows still another example of the wheel bearing. This wheel bearing 60 is a double-row outward angular contact ball bearing type classified as a third generation type, and is an inner ring rotating type and for driving wheel support. The wheel bearing 60 includes an outer member 61 having double-row rolling surfaces 64 on the inner periphery, an inner member 62 having rolling surfaces 65 respectively opposed to the rolling surfaces 64, and the double-rows. And a double row rolling element 63 interposed between the rolling surfaces 64 and 65. The outer member 61 is a member on the fixed side, and has a flange 61a attached to the knuckle in the suspension device (not shown) of the vehicle body on the outer periphery, and the whole is an integral part. The inner member 62 is a member on the rotation side, and is fitted to the outer periphery of the hub wheel 67 having a hub flange 67a for wheel attachment on the outer periphery and the inboard side end of the shaft portion 67b of the hub wheel 67. And the inner ring 68. The hub wheel 67 and the inner ring 68 are formed with the rolling surfaces 65 of each row. The rolling element 63 is made of a ball and is held by a holder 66 for each row. Both ends of the annular space formed between the inner and outer members 62 and 61 are sealed with a pair of bearing sealing devices 1 and 13. 2 is used as the bearing sealing device 1 on the inboard side.

この車輪用軸受６０の車両への組付けにおいては、等速自在継手の外側継手部材１６のステム部１６ａをハブ輪６７の貫通孔１７に挿通して、ステム部１６ａの外周面と貫通孔１７の内周面とをスプライン嵌合させ、ステム部１６ａの先端に螺合するナット１８の締め付けにより、前記外側継手部材１６を内方部材６２に結合する。このとき、外側継手部材１６に設けられたアウトボード側の断面１６ｂが、内輪６８のインボード側に向く端面６８ａに押し付けられ、外側継手部材１６とナット１８とで内方部材６２が幅締めされる。ホイール取付用のハブフランジ６７ａはハブ輪６７のアウトボード側端に位置しており、このハブフランジ６７ａにブレーキロータを介してホイール（いずれも図示せず）がハブボルト３７で取付けられる。 In assembling the wheel bearing 60 to the vehicle, the stem portion 16a of the outer joint member 16 of the constant velocity universal joint is inserted into the through hole 17 of the hub wheel 67, and the outer peripheral surface of the stem portion 16a and the through hole 17 are inserted. The outer joint member 16 is coupled to the inner member 62 by a spline fitting with the inner peripheral surface and tightening of a nut 18 screwed into the tip of the stem portion 16a. At this time, the cross section 16b on the outboard side provided in the outer joint member 16 is pressed against the end surface 68a facing the inboard side of the inner ring 68, and the inner member 62 is tightened by the outer joint member 16 and the nut 18. The The wheel mounting hub flange 67a is located at the end of the hub wheel 67 on the outboard side, and a wheel (not shown) is attached to the hub flange 67a with a hub bolt 37 via a brake rotor.

図１１は、車輪用軸受のさらに他の例を示す。この車輪用軸受７０は、第４世代型に分類される複列外向きアンギュラ玉軸受型であり、内輪回転タイプでかつ駆動輪支持用のものである。この車輪用軸受７０は、内周に複列の転走面７４を有する外方部材７１と、これら転走面７４にそれぞれ対向する転走面７５を有する内方部材７２と、これら複列の転走面７４，７５間に介在する複列の転動体７３とを備える。転動体７３はボールからなり、各列毎に保持器７６で保持されている。内外の部材７２，７１間に形成される環状空間の両端が一対の軸受密封装置１，１４で密封されている。インボード側の軸受密封装置１として、図２の構成例のものが用いられている。 FIG. 11 shows still another example of the wheel bearing. This wheel bearing 70 is a double-row outward angular contact ball bearing type classified as a fourth generation type, and is an inner ring rotating type and supporting a driving wheel. The wheel bearing 70 includes an outer member 71 having double-row rolling surfaces 74 on the inner periphery, an inner member 72 having rolling surfaces 75 respectively facing the rolling surfaces 74, and the double-rows. And a double row rolling element 73 interposed between the rolling surfaces 74 and 75. The rolling element 73 is made of a ball and is held by a holder 76 for each row. Both ends of the annular space formed between the inner and outer members 72 and 71 are sealed with a pair of bearing sealing devices 1 and 14. 2 is used as the bearing sealing device 1 on the inboard side.

外方部材７１は固定側の部材となるものであって、車体の懸架装置（図示せず）におけるナックルに取付けるフランジ７１ａを外周に有し、全体が一体の部品とされている。内方部材７２は回転側の部材となるものであって、軸部７７ｂの外周にホイール取付用のハブフランジ７７ａを有するハブ輪７７と、このハブ輪７７の中央孔７９にステム部７８ａが挿入されて嵌合する等速自在継手９０の外側継手部材７８とでなる。これらハブ輪７７および外側継手部材７８に前記各列の転走面７５が形成されている。ハブ輪７７のハブフランジ７７ａには、ブレーキロータを介してホイール（いずれも図示せず）がハブボルト３７で取付けられる。等速自在継手９０は、外側継手部材７８のカップ状部分７８ｂの球形内面に形成された複数の軸方向溝９５と、内側継手部材９１の球形外面に設けられた複数の軸方向溝９２内との間に、トルク伝達ボール９３をそれぞれ介在させ、トルク伝達ボール９３を保持する保持器９４を設けたものである。 The outer member 71 is a member on the fixed side, and has a flange 71a attached to the knuckle in the suspension device (not shown) of the vehicle body on the outer periphery, and the whole is an integral part. The inward member 72 is a member on the rotation side, and a hub ring 77 having a hub flange 77a for wheel attachment on the outer periphery of the shaft part 77b, and a stem part 78a is inserted into the center hole 79 of the hub ring 77. And the outer joint member 78 of the constant velocity universal joint 90 to be fitted. The hub wheel 77 and the outer joint member 78 are formed with the rolling surfaces 75 of each row. A wheel (not shown) is attached to the hub flange 77a of the hub wheel 77 with a hub bolt 37 via a brake rotor. The constant velocity universal joint 90 includes a plurality of axial grooves 95 formed on the spherical inner surface of the cup-shaped portion 78b of the outer joint member 78, and a plurality of axial grooves 92 provided on the spherical outer surface of the inner joint member 91. Between them, a torque transmission ball 93 is interposed, and a retainer 94 for holding the torque transmission ball 93 is provided.

１，１１，１２，１３，１４…軸受密封装置
２…シール板
２ａ…円筒部
２ｂ…立板部
３…弾性シール部材
４…芯金
４ａ…円筒部
４ｂ…立板部
５…弾性体
５ａ，５ｂ…サイドリップ
５ｃ，５ｄ…ラジアルリップ
６…リング状ばね部材
２０，３０，４０，５０，６０，７０…車輪用軸受
２１，４１，５１，６１，７１…外方部材
２２，４２，５２，６２，７２…内方部材
２３，４３，５３，６３，７３…転動体
４１ａ，５７ａ，６７ａ，７７ａ…ハブフランジ
５１ａ，６１ａ，７１ａ…ナックル取付用のフランジ
５７，６７，７７…ハブ輪
５７ｂ，６７ｂ，７７ｂ…ハブ輪の軸部
２４，４４，５４，６４，７４…外方部材の転走面
２５，４５，５５，６５，７５…内方部材の転走面
１６，７８…等速自在継手の外側継手部材
１６ａ，７８ａ…外側継手部材のステム部
１７…貫通孔
１８…ナット
１６ｂ…断面
２２Ａ，４２Ａ，５８Ａ，５８Ｂ，６８…軸受内輪
２６，４６，５６，６６，７６，９４…保持器
３７…ハブボルト
５７ｃ…加締部
５９，７９…中央孔
６８ａ…端面
７８ｂ…カップ状部分
９０…等速自在継手
９１…内側継手部材
９２…軸方向溝
９３…トルク伝達ボール
９５…軸方向溝 DESCRIPTION OF SYMBOLS 1, 11, 12, 13, 14 ... Bearing sealing apparatus 2 ... Seal plate 2a ... Cylindrical part 2b ... Standing plate part 3 ... Elastic seal member 4 ... Core metal 4a ... Cylindrical part 4b ... Standing plate part 5 ... Elastic body 5a, 5b ... side lips 5c, 5d ... radial lip 6 ... ring-shaped spring members 20, 30, 40, 50, 60, 70 ... wheel bearings 21, 41, 51, 61, 71 ... outer members 22, 42, 52, 62, 72 ... inner members 23, 43, 53, 63, 73 ... rolling elements 41a, 57a, 67a, 77a ... hub flanges 51a, 61a, 71a ... flanges 57, 67, 77 ... hub wheels 57b for attaching knuckles, 67b, 77b ... Hub wheel shaft portions 24, 44, 54, 64, 74 ... Outer member rolling surfaces 25, 45, 55, 65, 75 ... Inner member rolling surfaces 16, 78 ... Constant velocity freely. Outer joint member 16a, 78a ... outside of joint Stem portion 17 of hand member ... Through hole 18 ... Nut 16b ... Cross section 22A, 42A, 58A, 58B, 68 ... Bearing inner ring 26, 46, 56, 66, 76, 94 ... Retainer 37 ... Hub bolt 57c ... Casting portion 59 79 ... Central hole 68a ... End face 78b ... Cup-shaped portion 90 ... Constant velocity universal joint 91 ... Inner joint member 92 ... Axial groove 93 ... Torque transmission ball 95 ... Axial groove

Claims

A bearing sealing device installed at an end of a bearing space between an outer member and an inner member that rotate relative to each other via rolling elements in the bearing,
An annular seal plate and an elastic seal member, which are respectively attached to the inner member and the outer member and face each other,
The seal plate is made of a metal having an L-shaped cross section composed of a cylindrical portion fitted to the outer periphery of the inner member and a standing plate portion rising from an end portion of the cylindrical portion,
The elastic seal member is composed of an annular cored bar and an elastic body fixed to the cored bar,
The cored bar has a cylindrical portion that fits to the inner peripheral surface of the outer member and a standing plate portion that falls from an end portion of the cylindrical portion, and has an L-shaped cross section facing the seal plate,
The elastic body is arranged on the inside and outside in the radial direction of the cored bar, and two side lips whose tips are in contact with the standing plate portion of the seal plate, and on the outer peripheral surface of the seal plate arranged in the axial direction and a two radial lip tip you contact each without being reduced径付biased by means,
The two side lips extend obliquely from the cored bar toward the outer diameter side,
The side lip on the inner diameter side is a single line having no bent portion in the middle from the tip of one of the two radial lips to the tip of the side lip on the inner diameter side in contact with the standing plate portion of the seal plate. Extends to form a seal lip integrated with this radial lip,
Bearing sealing device.

2. The bearing sealing device according to claim 1, wherein the radial lip far from the upright plate portion of the seal plate of the two radial lips extends toward the inner diameter side obliquely toward the opposite side of the upright plate portion of the seal plate.

3. The bearing sealing device according to claim 1, wherein a cross-sectional height of the sealing device, which is a radial length from an inner diameter surface of the seal plate to an outer diameter surface of the elastic seal member, is 9 to 15 mm. The bearing sealing device.

4. The bearing sealing device according to claim 1, wherein the bearing is a wheel bearing provided with an outer member and an inner member that rotate relative to each other via a double row of rolling elements. 5. Some bearing sealing device.

It has an outer member and an inner member that rotate relative to each other through double row rolling elements, and has a bearing sealing device at the end of the bearing space between the outer member and the inner member. In the wheel bearing that supports the wheel,
A bearing for a wheel, wherein the bearing sealing device according to any one of claims 1 to 4 is used as the bearing sealing device.