JP2515335Y2 - Universal joint sealing device - Google Patents
Universal joint sealing deviceInfo
- Publication number
- JP2515335Y2 JP2515335Y2 JP1990123261U JP12326190U JP2515335Y2 JP 2515335 Y2 JP2515335 Y2 JP 2515335Y2 JP 1990123261 U JP1990123261 U JP 1990123261U JP 12326190 U JP12326190 U JP 12326190U JP 2515335 Y2 JP2515335 Y2 JP 2515335Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing case
- peripheral surface
- slinger
- shaft
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
- F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
本考案は、特にオイルシールからの潤滑油の漏れを改
善したユニバーサルジョイントの密封装置に関する。The present invention relates to a universal joint sealing device that improves leakage of lubricating oil from an oil seal.
従来、例えば自動車のトランスミッションのアウトプ
ットシャフトとプロペラシャフトとは、ユニバーサルジ
ョイントで連結している。 このユニバーサルジョイントは、具体的には、第２図
に示すように、アウトプットシャフトの端部に固定した
ヨークの軸受ケース1a,1aと、プロペラシャフトの端部
に固定したヨークの軸受ケース1b,1bとを、十字軸３で
連結して構成している。上記十字軸３の軸端部3aと軸受
ケース１（1a,1b）との間には転動体４を配置している
（実開昭63−49026号公報参照）。 この軸受ケース１の開口端1dは、シール部材５でシー
ルしている。 このシール部材５は、第３図に詳細に示すように、芯
金６と、この芯金６で支持されるオイルシール７とから
なる。この芯金６は、軸受ケース１の開口端1dに形成し
た凹段部1cに圧嵌めされる。上記オイルシール７は、軸
受ケース１の外方側にそれぞれ向き、上記十字軸３の根
元部3bに圧嵌めしたスリンガー８の外周面に摺接する第
１リップ部7aと、上記十字軸３の軸端部3aの外周面に摺
接する第２リップ部7bとを有している。Conventionally, for example, an output shaft of a vehicle transmission and a propeller shaft are connected by a universal joint. Specifically, as shown in FIG. 2, this universal joint includes yoke bearing cases 1a and 1a fixed to the end of the output shaft and yoke bearing cases 1b and 1b fixed to the end of the propeller shaft. And are connected by a cross shaft 3. A rolling element 4 is arranged between the shaft end 3a of the cross shaft 3 and the bearing case 1 (1a, 1b) (see Japanese Utility Model Laid-Open No. 63-49026). The open end 1d of the bearing case 1 is sealed by a seal member 5. As shown in detail in FIG. 3, the seal member 5 includes a core metal 6 and an oil seal 7 supported by the core metal 6. The cored bar 6 is press-fitted into the recessed step portion 1c formed at the opening end 1d of the bearing case 1. The oil seals 7 face the outer sides of the bearing case 1, respectively, and a first lip portion 7a that is in sliding contact with the outer peripheral surface of the slinger 8 that is press-fitted to the root portion 3b of the cross shaft 3, and the shaft of the cross shaft 3. It has a second lip portion 7b which is in sliding contact with the outer peripheral surface of the end portion 3a.
しかしながら、上記オイルシール７の各リップ部7a,7
bは、すべて外方側に向いている。したがって、第２図
に示したように、十字軸３の潤滑油供給孔3cから遠心力
で上記転動体４の回転部分に供給された潤滑油の圧力に
対して、各リップ部7a,7bが逃げ勝手となる。そこで、
ユニバーサルジョイントの回転時には、第２リップ部7b
と十字軸３の軸端部3aの外周面との間の隙間と、第１リ
ップ部7aとスリンガー８の外周面との間の隙間とを通っ
て、潤滑油が外部に漏れやすいという問題があった。 そこで、本考案の目的は、シール部材の構造を工夫し
て、オイルシールから潤滑油が漏れにくいユニバーサル
ジョイントの密封装置を提供することにある。However, the lip portions 7a, 7 of the oil seal 7 are
b is all facing outward. Therefore, as shown in FIG. 2, the respective lip portions 7a, 7b are pressed against the pressure of the lubricating oil supplied from the lubricating oil supply hole 3c of the cross shaft 3 to the rotating portion of the rolling element 4 by centrifugal force. Run away. Therefore,
When rotating the universal joint, the second lip portion 7b
And the outer peripheral surface of the shaft end portion 3a of the cross shaft 3 and the clearance between the first lip portion 7a and the outer peripheral surface of the slinger 8 tend to leak lubricating oil to the outside. there were. Therefore, an object of the present invention is to devise a structure of a seal member to provide a universal joint sealing device in which lubricating oil does not easily leak from an oil seal.
上記目的を達成するため、本考案は、ヨークの軸受ケ
ースと十字軸の軸端部との間に転動体が配置され、この
軸受ケースの開口端を密封するシール部材が設けられた
ユニバーサルジョイントの密封装置において、 上記十字軸の根元部に圧嵌めされ、かつ上記軸受ケー
スの内方側向きに開放した略Ｕ字形状のスリンガーと、
上記軸受ケースの開口端に取付けられるシール部材とを
備え、このシール部材は、芯金とオイルシールとからな
り、この芯金は、上記軸受ケースの開口端に形成した凹
段部に圧嵌めされる圧嵌め部と、上記オイルシールを支
持する支持部と、上記転動体の端面を押える押え部とを
有し、上記オイルシールは、軸受ケースの内方側に向き
上記十字軸の軸端部の外周面に摺接する主リップ部と、
軸受ケースの外方側に向き上記スリンガーの内筒部外周
面に摺接する補助リップ部と、軸受ケースの内方側に向
き上記スリンガーの外筒部内周面に摺接するリップ部と
を有することを特徴としている。To achieve the above object, the present invention provides a universal joint in which a rolling element is arranged between a bearing case of a yoke and a shaft end portion of a cross shaft, and a seal member for sealing an opening end of the bearing case is provided. In the sealing device, a substantially U-shaped slinger that is press-fitted to the root of the cross shaft and is opened inward of the bearing case,
And a seal member attached to the opening end of the bearing case. The seal member includes a core metal and an oil seal, and the core metal is press-fitted into a concave step portion formed at the opening end of the bearing case. A press-fitting portion, a support portion that supports the oil seal, and a pressing portion that presses the end surface of the rolling element, and the oil seal faces the inner side of the bearing case and the shaft end portion of the cross shaft. A main lip portion that is in sliding contact with the outer peripheral surface of
An auxiliary lip portion facing the outer side of the bearing case and slidingly contacting the outer peripheral surface of the inner cylindrical portion of the slinger; and a lip portion facing the inner side of the bearing case and slidingly contacting the inner peripheral surface of the outer cylindrical portion of the slinger. It has a feature.
軸受ケースの開口端に形成した凹段部に芯金の圧嵌め
部を圧嵌めして、オイルシールの内方側向きの主リップ
部を、十字軸の軸端部の外周面に摺接させ、オイルシー
ルの外方側向きの補助リップ部を、スリンガーの外周面
に摺接させる。 上記芯金を凹段部に圧嵌めすると、芯金の押え部で転
動体の端面が押えられ、転動体の軸方向の移動が規制さ
れる。 オイルシールの主リップ部は内方側に向いているの
で、転動体の回転部分に供給された潤滑油の圧力に対し
て食い込み勝手となり、この潤滑油の圧力で十字軸の軸
端部の外周面に強く押し付けられるようになる。したが
って、潤滑油の流出が防止される。 また、オイルシールの補助リップ部は外方側に向いて
いるので、外気圧に対して食い込み勝手となり、この外
気圧でスリンガーの外周面に強く押し付けられる。した
がって、異物の侵入が防止される。 また、上記オイルシールは、軸受ケースの内方側（い
いかえれば、外部への排出側）に向き上記スリンガーの
外筒部内周面に摺接するリップ部を有しているから、外
部からのダスト侵入防止が十分に行われる。 さらには、上記主リップは十字軸の軸端部の外周面に
摺接し、かつ、上記補助リップは上記スリンガーの内筒
部外周面に摺接し、かつ、上記リップ部は上記スリンガ
ーの外筒部内周面に摺接している。したがって、上記オ
イルシールの各リップ部は全て円筒面上に接触させられ
ている。したがって、十字軸が上記オイルシールに対し
て軸方向に移動してもリップ部の接触圧の変動が生じ難
くて、シール性能が低下しない。Press-fit the press-fitting part of the core metal into the recessed part formed at the open end of the bearing case, and slide the main lip part of the oil seal facing inward to the outer peripheral surface of the shaft end part of the cross shaft. , The auxiliary lip portion of the oil seal facing outward is slidably contacted with the outer peripheral surface of the slinger. When the cored bar is press-fitted into the recessed step portion, the end portion of the rolling element is pressed by the pressing part of the cored bar, and the axial movement of the rolling element is restricted. Since the main lip of the oil seal faces inward, it tends to bite into the pressure of the lubricating oil supplied to the rotating part of the rolling element, and the pressure of this lubricating oil causes the outer periphery of the shaft end of the cross shaft to move. You will be able to press strongly against the surface. Therefore, the outflow of lubricating oil is prevented. Further, since the auxiliary lip portion of the oil seal faces the outer side, the auxiliary lip portion bites against the outside air pressure and is strongly pressed against the outer peripheral surface of the slinger by this outside air pressure. Therefore, entry of foreign matter is prevented. Further, since the oil seal has a lip portion that faces the inner side of the bearing case (in other words, the discharge side to the outside) and is in sliding contact with the inner peripheral surface of the outer cylinder portion of the slinger, dust intrusion from the outside Prevention is adequate. Furthermore, the main lip is in sliding contact with the outer peripheral surface of the shaft end of the cross shaft, the auxiliary lip is in sliding contact with the outer peripheral surface of the inner cylinder of the slinger, and the lip is in the outer cylinder of the slinger. It is in sliding contact with the peripheral surface. Therefore, all the lip portions of the oil seal are in contact with the cylindrical surface. Therefore, even if the cross shaft moves in the axial direction with respect to the oil seal, the contact pressure of the lip portion is unlikely to fluctuate, and the sealing performance does not deteriorate.
以下、本考案を第１図の実施例により詳細に説明す
る。 なお、第２図以下の従来技術と同一構成・作用の箇所
は、同一番号を付して詳細な説明を省略する。 第１図に示すように、ユニバーサルジョイントの十字
軸３の軸端部3aとヨークの軸受ケース１との間には転動
体４が配置されている。この軸受ケース１の開口端1dに
は凹段部1cが形成されている。 上記十字軸３の根元部3bの外周面には、軸受ケース１
の内方側向きに開放した略Ｕ字状のスリンガー10の内筒
部としての内脚10aの内周面が圧嵌めされている。 一方、シール部材11は、芯金12とオイルシール13とか
ら構成している。 この芯金12には、上記軸受ケース１の凹段部1cの内周
面に、軸方向から外周面が圧嵌めされる重ね合わされた
部分である圧嵌め部12aと、この圧嵌め部12aから内・外
方向へフランジ状に突出し、上記オイルシール13にイン
サートモールドされて、このオイルシール13を支持する
支持部12bと、上記圧嵌め部12aの内周面に圧嵌めで一体
化され、上記転動体４の端面4aを押える押え部12cとが
設けられている。 なお、上記押え部12cは、芯金12に一体化する必要は
なく、例えば、軸受ケース１の凹段部1cの底面と芯金12
の圧嵌め部12aとの間にリング状の平板を挟み込んで、
この平板で転動体４の端面4aを押えるものでも良い。 上記オイルシール13には、上記軸受ケース１の内方側
に向き、上記十字軸３の軸端部3aの外周面に摺接する主
リップ部13aが設けられ、この主リップ部13aには、主リ
ップ部13aを縮径方向に付勢するリング状のコイルスプ
リング14がインサートモールドされている。 この主リップ部13aは、フリー状態では実線の位置に
あるが、十字軸３の軸端部3aの外周面に摺接した状態で
は二点鎖線のように変位する。 上記オイルシール13には、上記軸受ケース１の外方側
に向き、上記スリンガー10の内脚10aの外周面に摺接す
る補助リップ部13bが設けられ、この補助リップ部13b
は、フリー状態では実線の位置であるが、スリンガー10
の内脚10aの外周面に摺接した状態では二点鎖線のよう
に変位する。 また、上記オイルシール13には、十字軸３の軸端部3a
と根元部3bとの間の湾曲部3dに僅かの隙間を隔てて対向
するリップ部13cと、上記軸受ケース１の開口側端面1e
に接触して、実線の状態から二点鎖線の状態に変位する
膨出部13dと、上記スリンガー10の外筒部としての外脚1
0bの内周面に外方側に向いて摺接して、実線の状態から
二点鎖線の状態に変位するリップ部13eとが設けられて
いる。 なお、このリップ部13eは、スリンガー10に接触させ
る必要はなく、非接触の場合には、スリンガー10の外脚
10bとの間をラビリンス構造とすれば良い。 上記構成によれば、外部からの雨水等の大部分は、ま
ず、スリンガー10により跳ね飛ばされるが、軸受ケース
１の端面1eとスリンガー10の外脚10bとの隙間に侵入し
た雨水等は、オイルシール13の膨出部13dで軸受ケース
１の開口端1d側への侵入が阻止され、リップ部13eでス
リンガー10内への侵入が阻止される。 また、補助リップ部13bは、外方側に向いているか
ら、外気圧に対して食い込み勝手となり、この外気圧で
スリンガー10の内脚10aの外周面に強く押し付けられる
ので、スリンガー10内に侵入した雨水等は、この補助リ
ップ部13bで十字軸３の湾曲部3d側への侵入が阻止され
る。 さらに、主リップ部13aは、内方側に向いているか
ら、上記転動体４の回転部分に供給された潤滑油の圧力
に対して食い込み勝手となり、このの潤滑油の圧力及び
コイルスプリング14の付勢力で十字軸３の軸端部3aの外
周面に強く押し付けられるので、主リップ部13aと十字
軸３の軸端部3aの外周面との間の隙間を通って潤滑油が
外部に漏れにくくなる。また、異物の侵入も防止する。 また、上記オイルシール13は、軸受ケース１の内方側
（いいかえれば、外部への排出側）に向き上記スリンガ
ー10の外脚10b内周面に摺接するリップ部13eを有してい
るから、外部からのダスト侵入防止が十分に行われる。 さらには、上記主リップ部13aは十字軸３の軸端部3a
の外周面に摺接し、かつ、上記補助リップ部13bは上記
スリンガー10の内脚10a外周面に摺接し、かつ、上記リ
ップ部13eは上記スリンガー10の外脚10b内周面に摺接し
ている。したがって、上記オイルシール13の各リップ部
13a,13b,13eは全て円筒面上に接触させられている。し
たがって、十字軸３が上記オイルシール13に対して軸方
向に移動してもリップ部13a,13b,13eの接触圧の変動が
生じ難くて、シール性能が低下しない。 本考案者の比較実験によれば、潤滑油の漏れが、第３
図に示した従来のシール部材５では約33.9％であったの
に対して、本案のシール部材11では約1.4％であり、漏
れが大幅に減少することが確認された。Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIG. It should be noted that parts having the same configurations and functions as those of the prior art shown in FIG. 2 and subsequent figures are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 1, a rolling element 4 is arranged between the shaft end 3a of the cross shaft 3 of the universal joint and the bearing case 1 of the yoke. A concave step portion 1c is formed at the opening end 1d of the bearing case 1. On the outer peripheral surface of the root portion 3b of the cross shaft 3, the bearing case 1
The inner peripheral surface of the inner leg 10a serving as the inner cylindrical portion of the substantially U-shaped slinger 10 which is opened inwardly is press-fitted. On the other hand, the seal member 11 is composed of a core metal 12 and an oil seal 13. The core metal 12 includes a press-fitting portion 12a, which is a superposed portion in which the outer peripheral surface is press-fitted from the axial direction, on the inner peripheral surface of the concave step portion 1c of the bearing case 1, and the press-fitting portion 12a. Inwardly and outwardly protruding in a flange shape, insert-molded into the oil seal 13, a support portion 12b for supporting the oil seal 13 and an inner peripheral surface of the press-fitting portion 12a are integrated by press-fitting. A pressing portion 12c for pressing the end surface 4a of the rolling element 4 is provided. The pressing portion 12c does not need to be integrated with the core metal 12, and for example, the bottom surface of the recessed step portion 1c of the bearing case 1 and the core metal 12 can be used.
Insert a ring-shaped flat plate between it and the press-fitting part 12a of
The flat plate may press the end surface 4a of the rolling element 4. The oil seal 13 is provided with a main lip portion 13a facing the inner side of the bearing case 1 and in sliding contact with the outer peripheral surface of the shaft end portion 3a of the cross shaft 3. The main lip portion 13a has a main lip portion 13a. A ring-shaped coil spring 14 for urging the lip portion 13a in the radial direction is insert-molded. The main lip portion 13a is in the position of the solid line in the free state, but is displaced like a two-dot chain line in the state of sliding contact with the outer peripheral surface of the shaft end portion 3a of the cross shaft 3. The oil seal 13 is provided with an auxiliary lip portion 13b facing the outer side of the bearing case 1 and in sliding contact with the outer peripheral surface of the inner leg 10a of the slinger 10. The auxiliary lip portion 13b is provided.
Is the position of the solid line in the free state, but slinger 10
When it is in sliding contact with the outer peripheral surface of the inner leg 10a, it is displaced as shown by a two-dot chain line. Further, the oil seal 13 has a shaft end portion 3a of the cross shaft 3.
And a root portion 3b between the curved portion 3d and the lip portion 13c facing each other with a slight gap, and the opening side end surface 1e of the bearing case 1.
And the outer leg 1 as the outer cylinder portion of the slinger 10 which contacts the bulge 13d and is displaced from the solid line state to the two-dot chain line state.
A lip portion 13e is provided on the inner peripheral surface of 0b, which is slidably contacted outward and is displaced from a solid line state to a two-dot chain line state. The lip portion 13e does not need to be in contact with the slinger 10, and when it is not in contact, the outer leg of the slinger 10 is not used.
A labyrinth structure may be formed between 10b. According to the above configuration, most of rainwater from the outside is first splashed by the slinger 10, but rainwater that has entered the gap between the end surface 1e of the bearing case 1 and the outer leg 10b of the slinger 10 is oiled. The bulging portion 13d of the seal 13 prevents entry into the opening end 1d side of the bearing case 1, and the lip portion 13e prevents entry into the slinger 10. Further, since the auxiliary lip portion 13b faces the outside, it is apt to bite into the outside air pressure and is strongly pressed against the outer peripheral surface of the inner leg 10a of the slinger 10 by this outside pressure, so that it enters the slinger 10. The rainwater and the like that have entered are prevented from entering the curved portion 3d side of the cross shaft 3 by the auxiliary lip portion 13b. Further, since the main lip portion 13a faces inward, it is apt to bite into the pressure of the lubricating oil supplied to the rotating portion of the rolling element 4, and the pressure of the lubricating oil and the coil spring 14 Since the urging force strongly presses the outer peripheral surface of the shaft end 3a of the cross shaft 3, the lubricating oil leaks to the outside through the gap between the main lip portion 13a and the outer peripheral surface of the shaft end 3a of the cross shaft 3. It gets harder. It also prevents foreign matter from entering. Further, since the oil seal 13 has a lip portion 13e that faces the inner side of the bearing case 1 (in other words, the discharge side to the outside) and is in sliding contact with the inner peripheral surface of the outer leg 10b of the slinger 10. Sufficient protection against dust from the outside. Further, the main lip portion 13a is the shaft end portion 3a of the cross shaft 3.
Of the slinger 10, the auxiliary lip portion 13b is in sliding contact with the outer surface of the inner leg 10a of the slinger 10, and the lip portion 13e is in sliding contact with the inner surface of the outer leg 10b of the slinger 10. . Therefore, each lip portion of the oil seal 13 is
13a, 13b, 13e are all in contact with the cylindrical surface. Therefore, even if the cross shaft 3 moves in the axial direction with respect to the oil seal 13, the contact pressure of the lip portions 13a, 13b, 13e hardly fluctuates, and the sealing performance does not deteriorate. According to a comparative experiment by the present inventor, the leakage of the lubricating oil is
In the conventional seal member 5 shown in the figure, it was about 33.9%, whereas with the seal member 11 of the present invention, it was about 1.4%, and it was confirmed that the leakage was significantly reduced.
以上の説明より明らかなように、本考案は、軸受ケー
スの凹端部に圧嵌めした芯金でオイルシールを支持し、
このオイルシールの内方側向きの主リップ部を、十字軸
の軸端部の外周面に摺接させ、オイルシールの外方側向
きの補助リップ部を、スリンガーの内筒部外周面に摺接
させ、さらには、軸受ケースの内方側に向き上記スリン
ガーの外筒部内周面に摺接するリップ部を備えたもので
ある。 しがたって、芯金を軸受ケースの凹段部に圧嵌めする
と、芯金の押え部で転動体の端面が押えられ、転動体の
軸方向の移動を規制することができる。 また、オイルシールの主リップ部は軸受ケースの内方
側に向けているので、転動体の回転部分に供給された潤
滑油の圧力に対して食い込み勝手となり、この潤滑油の
圧力で十字軸の軸端部の外周面に強く押し付けられるよ
うになって、潤滑油が主リップ部と十字軸の軸端部の外
周面との間を通って外部に漏れにくくなる。 さらに、オイルシールの補助リップ部は軸受ケースの
外方側に向けているので、外気圧に対して食い込み勝手
となり、この外気圧でスリンガーの外周面に強く押し付
けられるようになって、外部からの雨水等の異物の侵入
が阻止できるようになる。 また、上記オイルシールは、軸受ケースの内方側（い
いかえれば、外部への排出側）に向き上記スリンガーの
外筒部内周面に摺接するリップ部を有しているから、外
部からのダスト侵入を十分に防止できる。 さらには、上記主リップは十字軸の軸端部の外周面に
摺接し、かつ、上記補助リップは上記スリンガーの内筒
部外周面に摺接し、かつ、上記リップ部は上記スリンガ
ーの外筒部内周面に摺接していて、上記オイルシールの
各リップ部は全て円筒面上に接触させられている。した
がって、十字軸が上記オイルシールに対して軸方向に移
動してもリップ部の接触圧の変動が生じ難くて、シール
性能の低下，変動を防止できる。As is clear from the above description, the present invention supports the oil seal with the core metal press-fitted into the concave end of the bearing case,
The main lip of the oil seal facing inward is in sliding contact with the outer peripheral surface of the shaft end of the cross shaft, and the auxiliary lip of the oil seal facing outward is slid on the outer peripheral surface of the inner cylinder of the slinger. Further, a lip portion is provided which is in contact with the inner surface of the outer cylinder portion of the slinger and faces the inner side of the bearing case. Therefore, when the cored bar is press-fitted into the concave step portion of the bearing case, the end face of the rolling element is pressed by the pressing part of the cored bar, and the axial movement of the rolling element can be restricted. Further, since the main lip of the oil seal is directed toward the inner side of the bearing case, it is apt to bite into the pressure of the lubricating oil supplied to the rotating portion of the rolling element, and the pressure of this lubricating oil causes the cross shaft to rotate. Since it is strongly pressed against the outer peripheral surface of the shaft end portion, the lubricating oil is less likely to leak to the outside through the space between the main lip portion and the outer peripheral surface of the shaft end portion of the cross shaft. Furthermore, since the auxiliary lip part of the oil seal is directed to the outside of the bearing case, it is easy to bite against the outside air pressure, and this outside pressure allows it to be strongly pressed against the outer surface of the slinger, and It becomes possible to prevent the entry of foreign matter such as rainwater. Further, since the oil seal has a lip portion that faces the inner side of the bearing case (in other words, the discharge side to the outside) and is in sliding contact with the inner peripheral surface of the outer cylinder portion of the slinger, dust intrusion from the outside Can be sufficiently prevented. Furthermore, the main lip is in sliding contact with the outer peripheral surface of the shaft end of the cross shaft, the auxiliary lip is in sliding contact with the outer peripheral surface of the inner cylinder of the slinger, and the lip is in the outer cylinder of the slinger. It is in sliding contact with the peripheral surface, and all the lip portions of the oil seal are in contact with the cylindrical surface. Therefore, even if the cross shaft moves in the axial direction with respect to the oil seal, the contact pressure of the lip portion is unlikely to fluctuate, and the sealing performance can be prevented from being lowered or fluctuated.
第１図は本考案に係るユニバーサルジョイントの密封装
置の要部断面図、第２図はユニバーサルジョイントの一
部断面平面図、第３図は従来のユニバーサルジョイント
の密封装置の断面図である。 １…軸受ケース、1c…凹段部、1d…開口端、３…十字
軸、3a…軸端部、3b…根元部、４…転動体、10…スリン
ガー、11…シール部材、12…芯金、12a…圧嵌め部、12b
…支持部、12c…押え部、13…オイルシール、13a…主リ
ップ部、13b…補助リップ部。FIG. 1 is a sectional view of a main part of a universal joint sealing device according to the present invention, FIG. 2 is a partial sectional plan view of a universal joint, and FIG. 3 is a sectional view of a conventional universal joint sealing device. DESCRIPTION OF SYMBOLS 1 ... Bearing case, 1c ... Recessed step part, 1d ... Open end, 3 ... Cross shaft, 3a ... Shaft end part, 3b ... Root part, 4 ... Rolling element, 10 ... Slinger, 11 ... Sealing member, 12 ... Mandrel , 12a ... Press-fitting part, 12b
… Supporting part, 12c… Holding part, 13… Oil seal, 13a… Main lip part, 13b… Auxiliary lip part.
Claims (1)
間に転動体が配置され、この軸受ケースの開口端を密封
するシール部材が設けられたユニバーサルジョイントの
密封装置において、 上記十字軸の根元部に圧嵌めされ、かつ上記軸受ケース
の内方側向きに開放した略Ｕ字形状のスリンガーと、上
記軸受ケースの開口端に取付けられるシール部材とを備
え、このシール部材は、芯金とオイルシールとからな
り、この芯金は、上記軸受ケースの開口端に形成した凹
段部に圧嵌めされる圧嵌め部と、上記オイルシールを支
持する支持部と、上記転動体の端面を押える押え部とを
有し、上記オイルシールは、軸受ケースの内方側に向き
上記十字軸の軸端部の外周面に摺接する主リップ部と、
軸受ケースの外方側に向き上記スリンガーの内筒部外周
面に摺接する補助リップ部と、軸受ケースの内方側に向
き上記スリンガーの外筒部内周面に摺接するリップ部と
を有することを特徴とするユニバーサルジョイントの密
封装置。1. A universal joint sealing device in which a rolling element is arranged between a bearing case of a yoke and a shaft end of a cross shaft, and a seal member for sealing an opening end of the bearing case is provided. A slender having a substantially U shape, which is press-fitted to the root of the shaft and opened inward of the bearing case, and a seal member attached to the open end of the bearing case, the seal member including a core The core metal is composed of gold and an oil seal, and the core metal includes a press-fitting portion that is press-fitted into a recessed step portion formed at the opening end of the bearing case, a support portion that supports the oil seal, and an end surface of the rolling element. A main lip portion that is in contact with the outer peripheral surface of the shaft end portion of the cross shaft and that faces the inner side of the bearing case.
An auxiliary lip portion facing the outer side of the bearing case and slidingly contacting the outer peripheral surface of the inner cylindrical portion of the slinger; and a lip portion facing the inner side of the bearing case and slidingly contacting the inner peripheral surface of the outer cylindrical portion of the slinger. Characteristic universal joint sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990123261U JP2515335Y2 (en) | 1990-11-21 | 1990-11-21 | Universal joint sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990123261U JP2515335Y2 (en) | 1990-11-21 | 1990-11-21 | Universal joint sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0478335U JPH0478335U (en) | 1992-07-08 |
| JP2515335Y2 true JP2515335Y2 (en) | 1996-10-30 |
Family
ID=31870976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990123261U Expired - Fee Related JP2515335Y2 (en) | 1990-11-21 | 1990-11-21 | Universal joint sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515335Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5724216B2 (en) * | 2010-05-27 | 2015-05-27 | 日本精工株式会社 | Linear guide device |
-
1990
- 1990-11-21 JP JP1990123261U patent/JP2515335Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0478335U (en) | 1992-07-08 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |