JP4855164B2 - Cross groove type constant velocity universal joint - Google Patents

Cross groove type constant velocity universal joint Download PDF

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JP4855164B2
JP4855164B2 JP2006195372A JP2006195372A JP4855164B2 JP 4855164 B2 JP4855164 B2 JP 4855164B2 JP 2006195372 A JP2006195372 A JP 2006195372A JP 2006195372 A JP2006195372 A JP 2006195372A JP 4855164 B2 JP4855164 B2 JP 4855164B2
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ball
outer ring
universal joint
constant velocity
velocity universal
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JP2008025602A (en
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直宏 宇根
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NTN Corp
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NTN Corp
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Description

この発明はクロスグルーブ型等速自在継手に関するもので、たとえば、自動車、鉄道車両、各種産業機械の駆動系において利用することができる。   The present invention relates to a cross-groove type constant velocity universal joint, and can be used in, for example, drive systems of automobiles, railway vehicles, and various industrial machines.

クロスグルーブ型等速自在継手は、対をなす内輪のボール溝と外輪のボール溝が軸線に対して互いに逆方向に傾斜しており、両ボール溝の交差部にトルク伝達ボールを保持するようになっている。このような構造であるため、トルク伝達ボールとボール溝との間のがたつきを少なくすることができ、特に、がたつきを嫌う自動車のプロペラシャフトやドライブシャフト等に多用されている。   In the cross groove type constant velocity universal joint, the ball groove of the inner ring and the ball groove of the outer ring that form a pair are inclined in opposite directions with respect to the axis, and the torque transmission ball is held at the intersection of both ball grooves. It has become. Because of such a structure, rattling between the torque transmitting ball and the ball groove can be reduced, and in particular, it is frequently used for propeller shafts, drive shafts and the like of automobiles that do not like rattling.

図１を参照して説明すると、互いに逆方向に傾斜した内輪２のボール溝２ａ（またはボール溝２ｂ）と外輪４のボール溝４ａ（またはボール溝４ｂ）が対をなし、対をなすボール溝２ａとボール溝４ａまたはボール溝２ｂとボール溝４ｂの交差部にトルク伝達ボール６が組み込んである。外輪４の一方の、図１（Ａ）では左側の端面に、継手内部に充填したグリースの漏洩を防止するためのエンドプレート１０が装着してある。また、外輪４のもう一方の端面には、ブーツアダプタ１２が装着してある。エンドプレート１０とブーツアダプタ１２は、外輪４のボール溝４ａ，４ｂの開口端部に対向する位置に、ぬすみ部１０ｃが形成してある。ぬすみ部１０ｃは、トルク伝達ボール６がボール溝に沿って転動する際、ボール溝の端部まで転動してきたトルク伝達ボールの一部を受け入れることにより、できるだけ長い転動ストロークを許容する。図１のクロスグルーブ型等速自在継手は図１（Ｂ）からわかるように６個のトルク伝達ボール６を用いるものであるが、この場合、エンドプレート（図２）およびブーツアダプタ（図３）には、互いに独立した６つのぬすみ部１０ｃ，１２ｃが等配してある。
特開２００６−１３２６６９ Referring to FIG. 1, the ball groove 2a (or ball groove 2b) of the inner ring 2 and the ball groove 4a (or ball groove 4b) of the outer ring 4 that are inclined in opposite directions form a pair, and the ball grooves forming a pair. A torque transmitting ball 6 is incorporated at the intersection of 2a and the ball groove 4a or the ball groove 2b and the ball groove 4b. An end plate 10 for preventing leakage of grease filled in the joint is attached to one end of the outer ring 4 on the left end face in FIG. A boot adapter 12 is attached to the other end face of the outer ring 4. The end plate 10 and the boot adapter 12 are formed with a slack portion 10 c at a position facing the open ends of the ball grooves 4 a and 4 b of the outer ring 4. When the torque transmitting ball 6 rolls along the ball groove, the thinning portion 10c accepts a part of the torque transmitting ball that has rolled to the end of the ball groove, thereby allowing a rolling stroke as long as possible. The cross groove type constant velocity universal joint of FIG. 1 uses six torque transmitting balls 6 as can be seen from FIG. 1B. In this case, the end plate (FIG. 2) and the boot adapter (FIG. 3) are used. In the figure, six blind portions 10c and 12c which are independent from each other are equally arranged.
JP 2006-132669 A

従来、トルク伝達ボールの数は６が一般的であったが、その場合、引っ掛かりが生じ、作業性が悪化するという問題があった。そのため、特許文献１ではトルク伝達ボールの数を８以上に増やすことを提案している。トルク伝達ボールの数を増やしたクロスグルーブ型等速自在継手でも、エンドプレートやブーツアダプタのぬすみ部とトルク伝達ボールを干渉させてスライドを規制している。それゆえ、エンドプレートとブーツアダプタのぬすみ部もトルク伝達ボールの数だけ存在する。ところが、エンドプレートとブーツアダプタの成型はプレスによる絞りであることから、円周上にぬすみ個所が多いとプレス金型への負荷が大きくなり、精度よく形状を成型できないという問題がある。この問題点を除去することがこの発明の主要な目的である。   Conventionally, the number of torque transmitting balls is generally six, but in this case, there is a problem that the catching occurs and workability is deteriorated. Therefore, Patent Document 1 proposes increasing the number of torque transmission balls to 8 or more. Even in a cross-groove type constant velocity universal joint with an increased number of torque transmission balls, the sliding of the end plate and the boot adapter is prevented by interfering with the torque transmission balls. Therefore, the end plate and the boot adapter have a thin portion corresponding to the number of torque transmission balls. However, since the molding of the end plate and the boot adapter is performed by pressing, there is a problem that if there are many thin spots on the circumference, the load on the press mold increases and the shape cannot be molded with high accuracy. It is the main object of the present invention to eliminate this problem.

この発明のクロスグルーブ型等速自在継手は、軸線に対して互いに逆方向に傾斜したボール溝を円周方向に交互に形成した外周面を有する内輪と、軸線に対して互いに逆方向に傾斜したボール溝を円周方向に交互に形成した内周面を有する外輪と、軸線に対して互いに逆方向に傾斜した内輪のボール溝と外輪のボール溝との交差部に組み込んだトルク伝達ボールと、内輪の外周面と外輪の内周面との間に介在してトルク伝達ボールを円周方向で所定間隔に保持するケージと、外輪に装着して内部に充填したグリースの漏洩を防止するためのエンドプレートとを有し、前記エンドプレートがトルク伝達ボールを受け入れるためのぬすみ部をボール毎に有し、隣り合った２つのぬすみ部が連通していることを特徴とするものである。 The cross groove type constant velocity universal joint according to the present invention includes an inner ring having an outer peripheral surface in which ball grooves inclined in opposite directions with respect to the axis are alternately formed in a circumferential direction, and inclined in directions opposite to each other with respect to the axis. An outer ring having an inner peripheral surface in which ball grooves are alternately formed in the circumferential direction, a torque transmission ball incorporated at the intersection of the inner ring ball groove and the outer ring ball groove inclined in opposite directions with respect to the axis, and A cage that is interposed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring and holds the torque transmitting balls at a predetermined interval in the circumferential direction, and for preventing leakage of grease that is mounted on the outer ring and filled inside. An end plate, the end plate has a slack portion for receiving a torque transmitting ball for each ball, and two adjacent slack portions communicate with each other.

たとえば、６個のトルク伝達ボールを用いるクロスグルーブ型等速自在継手の場合、隣り合った２つのぬすみ部を連通させると、ぬすみ部の数は３となる。１０個のトルク伝達ボールを用いるクロスグルーブ型等速自在継手の場合、隣り合った２つのぬすみ部を連通させると、ぬすみ部の数は５となる（請求項３）。 For example, in the case of a cross-groove type constant velocity universal joint using six torque transmission balls, the number of the relief portions becomes 3 when two adjacent relief portions are communicated with each other. In the case of a cross groove type constant velocity universal joint using ten torque transmitting balls, the number of the nudging portions becomes 5 when two adjacent napping portions are communicated with each other (claim 3) .

請求項２の発明は、請求項１のクロスグルーブ型等速自在継手において、前記外輪の前記エンドプレートとは反対側に装着するブーツアダプタを有し、前記ブーツアダプタがトルク伝達ボールを受け入れるためのぬすみ部をボール毎に有し、隣り合った２つのぬすみ部が連通していることを特徴とするものである。 According to a second aspect of the present invention, in the cross groove type constant velocity universal joint according to the first aspect of the present invention, the cross groove type constant velocity universal joint has a boot adapter mounted on the opposite side of the outer ring from the end plate, and the boot adapter receives a torque transmitting ball. A thin portion is provided for each ball, and two adjacent thin portions are communicated with each other.

この発明によれば、エンドプレートやブーツアダプタの円周上に配置するぬすみ部の数を減らし、各ぬすみ部に２以上のトルク伝達ボールが入ってスライドを規制する構造となる。したがって、各ぬすみ部を大きくすることが可能となり、成型時の金型への負担を軽減することができる。   According to the present invention, the number of blind portions arranged on the circumference of the end plate or the boot adapter is reduced, and two or more torque transmission balls are placed in each blind portion to restrict the slide. Therefore, it is possible to increase the size of each blind portion, and it is possible to reduce the burden on the mold during molding.

以下、図面に従って本発明の実施の形態を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１に示すように、クロスグルーブ型等速自在継手は、内輪２と外輪４とトルク伝達ボール６とケージ８を有し、この発明の対象であるエンドプレート１０およびブーツアダプタ１２は外輪４の両側に装着される。   As shown in FIG. 1, the cross-groove type constant velocity universal joint includes an inner ring 2, an outer ring 4, a torque transmission ball 6 and a cage 8. The end plate 10 and the boot adapter 12 which are objects of the present invention are the same as those of the outer ring 4. Mounted on both sides.

内輪２はリング状で、外周面にボール溝２ａ，２ｂが形成してある。これらのボール溝２ａ，２ｂは、内輪２の軸線に対して互いに逆方向に傾斜しており、円周方向に交互に位置している。また、外輪４はディスクタイプで、内周面にボール溝４ａ，４ｂが形成してある。これらのボール溝４ａ，４ｂも、外輪４の軸線に対して互いに逆方向に傾斜しており、円周方向に交互に位置している。   The inner ring 2 is ring-shaped, and ball grooves 2a and 2b are formed on the outer peripheral surface. These ball grooves 2a and 2b are inclined in directions opposite to each other with respect to the axis of the inner ring 2, and are alternately positioned in the circumferential direction. The outer ring 4 is a disk type, and ball grooves 4a and 4b are formed on the inner peripheral surface. These ball grooves 4a and 4b are also inclined in opposite directions with respect to the axis of the outer ring 4, and are alternately positioned in the circumferential direction.

互いに逆方向に傾斜した内輪２のボール溝２ａ（またはボール溝２ｂ）と外輪４のボール溝４ａ（またはボール溝４ｂ）が対をなし、対をなすボール溝２ａとボール溝４ａまたはボール溝２ｂとボール溝４ｂの交差部にトルク伝達ボール６が組み込んである。図１（Ｂ）からわかるように、ここでは内輪２のボール溝２ａ，２ｂと外輪４のボール溝４ａ，４ｂがそれぞれ６本あり、６個のトルク伝達ボール６が用いてある。   The ball groove 2a (or ball groove 2b) of the inner ring 2 and the ball groove 4a (or ball groove 4b) of the outer ring 4 that are inclined in opposite directions form a pair, and the paired ball groove 2a and ball groove 4a or ball groove 2b. And a torque transmission ball 6 is incorporated at the intersection of the ball grooves 4b. As can be seen from FIG. 1B, here there are six ball grooves 2a, 2b of the inner ring 2 and six ball grooves 4a, 4b of the outer ring 4, and six torque transmitting balls 6 are used.

エンドプレート１０は外輪４の一方の、図１（Ａ）では左側の端面に装着してある。図１（Ａ）ではエンドプレート１０の膨出部は平坦で、図２では膨出部は帽子のような形状をしていることからも理解できるように、膨出部の形状は特に問わない。エンドプレート１０の外周にフランジ部１０ａがあり、フランジ部１０ａにはボルト孔１０ｂが形成してある。図１（Ａ）に示すように、外輪４の端面にフランジ部１０ａを当て、外輪４のボルト孔４ｃとエンドプレート１０のボルト孔１０ｂに共通的にボルト１８を挿入する。なお、図示した実施の形態では、フランジ部１０ａから軸方向に延びる円筒状部分が設けてあり、この部分を外輪４の外周面に嵌合させてある。また、図示はしてないが、Ｏリング等を介在させてもよい。   The end plate 10 is attached to one end of the outer ring 4 on the left end face in FIG. In FIG. 1 (A), the bulging portion of the end plate 10 is flat, and in FIG. 2, the bulging portion has a shape like a hat. . A flange portion 10a is provided on the outer periphery of the end plate 10, and a bolt hole 10b is formed in the flange portion 10a. As shown in FIG. 1A, the flange portion 10 a is applied to the end face of the outer ring 4, and the bolt 18 is inserted in common into the bolt hole 4 c of the outer ring 4 and the bolt hole 10 b of the end plate 10. In the illustrated embodiment, a cylindrical portion extending in the axial direction from the flange portion 10 a is provided, and this portion is fitted to the outer peripheral surface of the outer ring 4. Although not shown, an O-ring or the like may be interposed.

図１（Ａ）に示すように、ブーツアダプタ１２はブーツ１４を取り付けるためのものである。小径端部にブーツ１４の大径端部を巻き込んで固定してあり、大径端部にて外輪４に装着する。ブーツ１４の小径端部は破線で示してあるシャフトに嵌めてブーツバンド１６で締め付けて固定する。ブーツアダプタ１２の大径端部は上に述べたエンドプレートと類似の形状をしている。すなわち、図３に示すように、ブーツアダプタ１２の大径端部には、フランジ部１２ａと、ボルト孔１２ｂと、ぬすみ部１２ｃが設けてある。したがって、図４、図５、図６を参照して以下に述べるエンドプレートの実施例の記述はブーツアダプタについても同様に当てはまる。   As shown in FIG. 1A, the boot adapter 12 is for attaching a boot 14. The large-diameter end of the boot 14 is wound around and fixed to the small-diameter end, and the large-diameter end is attached to the outer ring 4. The small-diameter end of the boot 14 is fitted on a shaft indicated by a broken line and is fastened and fixed by a boot band 16. The large-diameter end of the boot adapter 12 has a shape similar to the end plate described above. That is, as shown in FIG. 3, the large-diameter end portion of the boot adapter 12 is provided with a flange portion 12a, a bolt hole 12b, and a loose portion 12c. Therefore, the description of the embodiment of the end plate described below with reference to FIGS. 4, 5, and 6 applies to the boot adapter as well.

図４に示す第一の実施例は、図４（Ａ）に示すように、３つのぬすみ部１０ｃが等配してある。すなわち、この実施例は、図２に示すように従来１つずつ独立していた６つのぬすみ部のうち隣り合った２つのぬすみ部を連通させた例である。   In the first embodiment shown in FIG. 4, as shown in FIG. 4 (A), three thinning portions 10c are equally arranged. That is, in this embodiment, as shown in FIG. 2, two adjacent slidable portions are made to communicate with each other among six slidable portions that have been independent one by one.

図５に示す第二の実施例は、図５（Ａ）に示すように、５つのぬすみ部１０ｃが等配してある。すなわち、この実施例は、従来１つずつ独立していた１０のぬすみ部のうち隣り合った２つのぬすみ部を連通させた例である。   In the second embodiment shown in FIG. 5, as shown in FIG. 5A, five thinning portions 10c are equally arranged. That is, this embodiment is an example in which two adjacent slidable portions are made to communicate with each other among 10 slidable portions that have been independent one by one.

（Ａ）はクロスグルーブ型等速自在継手の縦断面図、（Ｂ）はエンドプレートを取り外した状態の端面図(A) is a longitudinal sectional view of a cross-groove type constant velocity universal joint, and (B) is an end view with the end plate removed. （Ａ）は従来のエンドプレートの裏面図、（Ｂ）は図２（Ａ）のＢ−Ｂ断面図(A) is a back view of a conventional end plate, (B) is a BB cross-sectional view of FIG. （Ａ）は従来のブーツアダプタの裏面図、（Ｂ）は図３（Ａ）のＢ−Ｂ断面図(A) is a back view of a conventional boot adapter, (B) is a BB cross-sectional view of FIG. （Ａ）は第一の実施例を示すエンドプレートの裏面図、（Ｂ）は断面図(A) is a back view of the end plate showing the first embodiment, (B) is a cross-sectional view. （Ａ）は第二の実施例を示すエンドプレートの裏面図、（Ｂ）は断面図(A) is a rear view of the end plate showing the second embodiment, (B) is a sectional view.

符号の説明Explanation of symbols

２ 内輪
２ａ，２ｂ ボール溝
４ 外輪
４ａ，４ｂ ボール溝
４ｃ ボルト孔
６ トルク伝達ボール
８ ケージ
１０ エンドプレート
１０ａ フランジ部
１０ｂ ボルト孔
１０ｃ ぬすみ部
１２ ブーツアダプタ
１２ａ フランジ部
１２ｂ ボルト孔
１２ｃ ぬすみ部
１４ ブーツ
１６ ブーツバンド
１８ ボルト 2 Inner ring 2a, 2b Ball groove 4 Outer ring 4a, 4b Ball groove 4c Bolt hole 6 Torque transmission ball 8 Cage 10 End plate 10a Flange portion 10b Bolt hole 10c Loose portion 12 Boot adapter 12a Flange portion 12b Bolt hole 12c Loose portion 14 Boot 16 Boot band 18 bolt

Claims (3)

軸線に対して互いに逆方向に傾斜したボール溝を円周方向に交互に形成した外周面を有する内輪と、軸線に対して互いに逆方向に傾斜したボール溝を円周方向に交互に形成した内周面を有する外輪と、軸線に対して互いに逆方向に傾斜した内輪のボール溝と外輪のボール溝との交差部に組み込んだトルク伝達ボールと、内輪の外周面と外輪の内周面との間に介在してトルク伝達ボールを円周方向で所定間隔に保持するケージと、外輪に装着して内部に充填したグリースの漏洩を防止するためのエンドプレートとを有し、前記エンドプレートがトルク伝達ボールを受け入れるためのぬすみ部をボール毎に有し、隣り合った２つのぬすみ部が連通しているクロスグルーブ型等速自在継手。 An inner ring having an outer peripheral surface in which ball grooves inclined in opposite directions with respect to the axis are alternately formed in the circumferential direction, and a ball groove in which the ball grooves inclined in directions opposite to the axis are alternately formed in the circumferential direction An outer ring having a peripheral surface, a torque transmission ball incorporated at the intersection of an inner ring ball groove and an outer ring ball groove inclined in opposite directions with respect to the axis, and an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring. And a cage for holding the torque transmission balls at a predetermined interval in the circumferential direction, and an end plate for mounting the outer ring to prevent leakage of grease filled therein, the end plate having torque A cross-groove type constant velocity universal joint having a relief portion for receiving a transmission ball for each ball, and two adjacent relief portions communicating with each other. 前記外輪の前記エンドプレートとは反対側に装着するブーツアダプタを有し、前記ブーツアダプタがトルク伝達ボールを受け入れるためのぬすみ部をボール毎に有し、隣り合った２つのぬすみ部が連通している請求項１のクロスグルーブ型等速自在継手。 A boot adapter that is mounted on the opposite side of the outer ring from the end plate; the boot adapter has a relief portion for receiving a torque transmission ball for each ball; and two adjacent relief portions communicate with each other. The cross groove type constant velocity universal joint according to claim 1. トルク伝達ボールの数が１０で、ぬすみ部の和が５である請求項１または２のクロスグルーブ型等速自在継手。   The cross groove type constant velocity universal joint according to claim 1 or 2, wherein the number of torque transmitting balls is 10 and the sum of the thinning portions is 5.
JP2006195372A 2006-07-18 2006-07-18 Cross groove type constant velocity universal joint Expired - Fee Related JP4855164B2 (en)

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JP2006195372A JP4855164B2 (en) 2006-07-18 2006-07-18 Cross groove type constant velocity universal joint

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JP2006195372A JP4855164B2 (en) 2006-07-18 2006-07-18 Cross groove type constant velocity universal joint

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JP2008025602A JP2008025602A (en) 2008-02-07
JP4855164B2 true JP4855164B2 (en) 2012-01-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776322A (en) * 1980-10-30 1982-05-13 Loehr & Bromkamp Gmbh Synchronous rotary coupling
JPS6271030A (en) * 1985-09-21 1987-04-01 Victor Co Of Japan Ltd Reproducing device for optical information signal
JPH0473624A (en) * 1990-07-13 1992-03-09 Hitachi Ltd Vtr with built-in camera
JP2000346087A (en) * 1999-04-02 2000-12-12 Ntn Corp Uniform velocity universal joint
DE19941142C2 (en) * 1999-08-30 2002-05-02 Gkn Automotive Gmbh Ball constant velocity joint
US7204760B2 (en) * 2004-04-21 2007-04-17 Gkn Driveline North America, Inc. Constant velocity joint vent

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