JP2010025319A - Inner coupling member of constant velocity universal joint - Google Patents

Inner coupling member of constant velocity universal joint Download PDF

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Publication number
JP2010025319A
JP2010025319A JP2008191054A JP2008191054A JP2010025319A JP 2010025319 A JP2010025319 A JP 2010025319A JP 2008191054 A JP2008191054 A JP 2008191054A JP 2008191054 A JP2008191054 A JP 2008191054A JP 2010025319 A JP2010025319 A JP 2010025319A
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joint member
constant velocity
velocity universal
universal joint
inner joint
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JP5165488B2 (en
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Hiroshi Murakami
裕志 村上
Tatsuro Sugiyama
達朗 杉山
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To increase the strength of an inner coupling member without changing a shape and size. <P>SOLUTION: This inner coupling member 20 of a constant velocity universal joint having an outer coupling member 10 engaged with a drive shaft or a driven shaft, the inner coupling member 20 engaged with the driven shaft or the drive shaft, and a torque transmission element 30 for transmitting torque interposed between the outer coupling member 10 and the inner coupling member 20 is formed by forging, heat-treated, and subjected to surface hardening by induction hardening. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は等速自在継手の内側継手部材に関する。より具体的には、内側継手部材に相当するのは、トルク伝達要素としてボールを使用するボールタイプの等速自在継手の場合はボールが転動するためのボール溝を有する内輪であり、トルク伝達要素としてローラを使用するトリポード系の等速自在継手の場合はローラを回転自在に支持するためのトラニオン・ジャーナルを有するトリポードである。   The present invention relates to an inner joint member of a constant velocity universal joint. More specifically, the inner joint member corresponds to an inner ring having a ball groove for rolling the ball in the case of a ball type constant velocity universal joint that uses a ball as a torque transmission element. In the case of a tripod constant velocity universal joint that uses a roller as an element, the tripod has a trunnion journal for rotatably supporting the roller.

等速自在継手は自動車や各種産業機械の動力伝達装置に使用される。とくに自動車用の等速自在継手の場合、等速自在継手の軽量・コンパクト化は自動車の燃費向上や駆動系レイアウトの自由度向上に寄与するため、必要とされる機能を満たした上で、できる限り小さい方が望ましい。   Constant velocity universal joints are used in power transmission devices for automobiles and various industrial machines. Especially in the case of constant velocity universal joints for automobiles, the light weight and compactness of constant velocity universal joints contributes to improving the fuel efficiency of automobiles and increasing the degree of freedom of drive train layout. The smallest is desirable.

等速自在継手は外側継手部材と、外側継手部材の内側に位置する内側継手部材と、両者間に介在してトルクを伝達するトルク伝達要素を含み、外側継手部材と駆動軸または従動軸を接続し、内側継手部材と従動軸または駆動軸と接続する。
等速自在継手は固定式としゅう動式に大別でき、前者の例としてバーフィールド型やアンダーカット・フリー型などがあり、後者の例としてはダブルオフセット型やトリポード型などがある。 The constant velocity universal joint includes an outer joint member, an inner joint member located inside the outer joint member, and a torque transmission element that is interposed between the outer joint member and transmits torque, and connects the outer joint member and the drive shaft or driven shaft. The inner joint member is connected to the driven shaft or the drive shaft.
Constant velocity universal joints can be broadly classified into fixed types and sliding types. Examples of the former include a barfield type and an undercut / free type, and examples of the latter include a double offset type and a tripod type.

等速自在継手の内側継手部材の熱処理は、高周波焼入れで行う場合もある。この場合、焼入れ後の硬度と鍛造性を両立させるため、中炭素鋼を用いることが多い。
特開２０００−２２７１２３号公報 米国公開特許公報２００５−００３９８２９号 The heat treatment of the inner joint member of the constant velocity universal joint may be performed by induction hardening. In this case, medium carbon steel is often used to achieve both hardness after quenching and forgeability.
JP 2000-227123 A US Published Patent Publication No. 2005-0039829

等速自在継手の軽量・コンパクト化に伴い、外側継手部材の内部に収容される内側継手部材の各部肉厚も薄くなっている。そのため、形状変更による強度向上はほぼ限界に達していると言える。
そこで、この発明の目的は、内側継手部材の形状や寸法を変更することなく強度を向上させることにある。 As the constant velocity universal joint becomes lighter and more compact, the thickness of each part of the inner joint member housed in the outer joint member is also reduced. Therefore, it can be said that the strength improvement by the shape change has almost reached the limit.
Therefore, an object of the present invention is to improve the strength without changing the shape and dimensions of the inner joint member.

この発明は、等速自在継手の内側継手部材の製造過程において、高周波焼入れの前に調質を行うことによって課題を解決した。
すなわち、この発明は、駆動軸または従動軸と接続する外側継手部材と、従動軸または駆動軸と接続する内側継手部材と、外側継手部材と内側継手部材との間に介在してトルクを伝達するトルク伝達要素を具備した等速自在継手の内側継手部材であって、鍛造により成形した後、調質を施し、高周波焼入れにより表面硬化処理を施してあることを特徴とする。高周波焼入れの前に調質を行うことで、非焼入れ部の硬度が上がり、かつ、組織が微細化するため、形状を変えることなく強度を向上させることができる。 This invention solved the problem by performing tempering before induction hardening in the manufacturing process of the inner joint member of the constant velocity universal joint.
That is, this invention transmits torque by being interposed between the outer joint member connected to the drive shaft or the driven shaft, the inner joint member connected to the driven shaft or the drive shaft, and the outer joint member and the inner joint member. An inner joint member of a constant velocity universal joint provided with a torque transmission element, wherein the inner joint member is formed by forging, tempered, and subjected to surface hardening treatment by induction hardening. By performing tempering before induction hardening, the hardness of the non-quenched portion is increased and the structure is refined, so that the strength can be improved without changing the shape.

外側継手部材と内側継手部材の間に介在するケージによって同一平面に保持された複数のボールをトルク伝達要素とするボールタイプの等速自在継手の場合、内側継手部材に該当するのは、ボールが転動するボール溝を有する内輪である（請求項６）。   In the case of a ball-type constant velocity universal joint that uses a plurality of balls held in the same plane by a cage interposed between the outer joint member and the inner joint member as a torque transmission element, the ball corresponds to the inner joint member. An inner ring having a ball groove that rolls.

トルク伝達要素としてローラを使用するトリポード系等速自在継手の場合、内側継手部材に該当するのは、ローラを回転自在に支持するトラニオン・ジャーナルを有するトリポードである（請求項７）。   In the case of a tripod constant velocity universal joint using a roller as a torque transmission element, the inner joint member corresponds to a tripod having a trunnion journal that rotatably supports the roller.

調質は、具体的には、４００〜６００℃の高温焼もどしとすることができる（請求項２）。   The tempering can be specifically tempered at a high temperature of 400 to 600 ° C. (Claim 2).

鍛造性と焼入れ性の両立を図るため、内側継手部材の材質は炭素０．４〜０．６ｗｔ％を含む炭素鋼が好ましい（請求項３）。   In order to achieve both forgeability and hardenability, the inner joint member is preferably made of carbon steel containing 0.4 to 0.6 wt% of carbon (Claim 3).

内側継手部材のコア部の硬度はＨＶ２５０以上が好ましい。通常、非焼入れ層の硬度はＨＶ１５０〜２５０程度であるところ、調質により、コア部の硬度をＨＶ２５０以上に高めることができる（請求項４）。   The hardness of the core portion of the inner joint member is preferably HV250 or more. Usually, the hardness of the non-quenched layer is about HV150 to 250, but the hardness of the core part can be increased to HV250 or more by refining (Claim 4).

調質により、内側継手部材のコア部の組織がトルースタイトまたはソルバイトであるのが好ましい（請求項５）。   The structure of the core part of the inner joint member is preferably troostite or sorbite due to tempering (Claim 5).

この発明によれば、調質を行った内側継手部材の非焼入れ部の組織はトルースタイト組織あるいはソルバイト組織になり、組織が微細化され、さらに硬度も上昇するため、引張り強度が改善され、内側継手部材の強度が向上する。また、繰返し負荷がかかる疲労強度でも、同じ理由で強度が向上する。   According to the present invention, the structure of the non-quenched portion of the tempered inner joint member becomes a troostite structure or a sorbite structure, the structure is refined, and the hardness is further increased. The strength of the joint member is improved. Moreover, even if the fatigue strength is subject to repeated loading, the strength is improved for the same reason.

以下、図面に従ってこの発明の実施の形態を説明する。
まず、ボールタイプの等速自在継手の例としてダブルオフセット型等速自在継手について述べる。ダブルオフセット型等速自在継手は、図１に示すように、外側継手部材としての外輪１０と、内側継手部材としての内輪２０と、トルク伝達要素としての複数のボール３０と、ケージ４０とを主要な構成要素としている。 Embodiments of the present invention will be described below with reference to the drawings.
First, a double offset type constant velocity universal joint will be described as an example of a ball type constant velocity universal joint. As shown in FIG. 1, the double offset type constant velocity universal joint mainly includes an outer ring 10 as an outer joint member, an inner ring 20 as an inner joint member, a plurality of balls 30 as torque transmission elements, and a cage 40. As a component.

外輪１０はマウス部１２とステム部１８とからなり、ステム部１８のスプライン（またはセレーション。以下、同じ。）軸部で駆動軸または従動軸とトルク伝達可能に接続するようになっている。マウス部１２の内周面１４は円筒形状で、その内周面１４の円周方向に等間隔に、軸方向に延びるボール溝１６が形成してある。   The outer ring 10 includes a mouse portion 12 and a stem portion 18, and is connected to a drive shaft or a driven shaft by a spline (or serration, hereinafter the same) shaft portion of the stem portion 18 so that torque can be transmitted. The inner peripheral surface 14 of the mouse portion 12 has a cylindrical shape, and ball grooves 16 extending in the axial direction are formed at equal intervals in the circumferential direction of the inner peripheral surface 14.

内輪２０は軸心部に形成したスプライン孔２２で従動軸または駆動軸とトルク伝達可能に接続するようになっている。内輪２０の外周面２４は凸球面状で、その外周面２４の円周方向に等間隔に、軸方向に延びるボール溝２６が形成してある。   The inner ring 20 is connected to the driven shaft or the drive shaft through a spline hole 22 formed in the shaft center portion so that torque can be transmitted. The outer peripheral surface 24 of the inner ring 20 has a convex spherical shape, and ball grooves 26 extending in the axial direction are formed at equal intervals in the circumferential direction of the outer peripheral surface 24.

外輪１０のボール溝１６と内輪２０のボール溝２６は対をなし、各対のボール溝１６、２６間に１個ずつ、ボール３０が組み込んである。ボール３０の数、したがってまたボール溝１６、２６の数は任意であるが、例を挙げるならば６または８が一般的である。   The ball groove 16 of the outer ring 10 and the ball groove 26 of the inner ring 20 form a pair, and one ball 30 is incorporated between each pair of ball grooves 16 and 26. The number of balls 30, and therefore also the number of ball grooves 16, 26, is arbitrary, but 6 or 8 is typical for example.

ケージ４０は外輪１０の内周面１４と内輪２０の外周面２４との間に介在させてある。ケージ４０の円周方向に所定の間隔で、半径方向に貫通するポケット４２が形成してあり、各ポケット４２に１個ずつ、ボール３０が収容される。したがって、ケージ４０によってすべてのボール３０が同一平面に保持される。   The cage 40 is interposed between the inner peripheral surface 14 of the outer ring 10 and the outer peripheral surface 24 of the inner ring 20. Pockets 42 penetrating in the radial direction are formed at predetermined intervals in the circumferential direction of the cage 40, and one ball 30 is accommodated in each pocket 42. Therefore, all the balls 30 are held on the same plane by the cage 40.

ケージ４０の外周面の円弧状断面部分の中心Ｏ1とケージ４０の内周面の円弧状断面部
分の中心Ｏ2は、軸方向に等距離だけ、継手の角度中心Ｏをはさんで反対向きにオフセッ
トさせてある。したがって、外輪１０の回転軸線と内輪２０の回転軸線が角度（作動角θ）をなした状態でトルクを伝達するとき、ケージ４０は、作動角θを二等分する平面にボール３０を配向せしめる役割を果たす。 The center O 1 of the arc-shaped cross-section portion of the outer peripheral surface of the cage 40 and the center O 2 of the arc-shaped cross-section portion of the inner peripheral surface of the cage 40 are opposite to each other across the angle center O of the joint by an equal distance in the axial direction. Is offset. Therefore, when the torque is transmitted in a state where the rotation axis of the outer ring 10 and the rotation axis of the inner ring 20 form an angle (operating angle θ), the cage 40 orients the ball 30 in a plane that bisects the operating angle θ. Play a role.

図２（Ａ）は内輪２０の横断面を示し、図２（Ｂ）は図２（Ａ）のＢ−Ｂ断面を示す。これらの図ではハッチングが省略してあり、梨地部分は内輪２０の内周面と外周面に形成した表面硬化層を表している。具体的には、スプライン孔２２と、外周面２４と、ボール溝２６に、それぞれ表面硬化層が設けてある。   2A shows a cross section of the inner ring 20, and FIG. 2B shows a BB cross section of FIG. 2A. In these drawings, hatching is omitted, and the satin portion represents a hardened surface layer formed on the inner and outer peripheral surfaces of the inner ring 20. Specifically, a hardened surface layer is provided on each of the spline hole 22, the outer peripheral surface 24, and the ball groove 26.

次に、トリポード型等速自在継手について述べる。トリポード型等速自在継手は、図３に示すように、外側継手部材としての外輪１１０と、内側継手部材としてのトリポード１２０と、トルク伝達要素としてのローラ１３０とを主要な構成要素としている。   Next, a tripod type constant velocity universal joint will be described. As shown in FIG. 3, the tripod type constant velocity universal joint includes an outer ring 110 as an outer joint member, a tripod 120 as an inner joint member, and a roller 130 as a torque transmission element as main components.

外輪１１０はマウス部１１２とステム部１１８とからなり、ステム部１１８のスプライン軸部で、駆動軸または従動軸とトルク伝達可能に接続するようになっている。マウス部１１２はカップ状で、内周面の円周方向三等分位置に軸方向に延びるトラック溝１１４が形成してある。トラック溝１１４の側壁を形成している面はローラ案内面１１６となる。   The outer ring 110 includes a mouse portion 112 and a stem portion 118, and is connected to a drive shaft or a driven shaft so that torque can be transmitted by a spline shaft portion of the stem portion 118. The mouse part 112 is cup-shaped, and a track groove 114 extending in the axial direction is formed at a circumferentially equally divided position on the inner peripheral surface. The surface forming the side wall of the track groove 114 is a roller guide surface 116.

トリポード１２０はボス１２２とトラニオン・ジャーナル１２６とからなり、ボス１２２の軸心部に形成したスプライン孔１２４で、従動軸または駆動軸とトルク伝達可能に接続するようになっている。トラニオン・ジャーナル１２６はボス１２２の円周方向三等分位置から半径方向に突出している。トラニオン・ジャーナル１２６は円筒形状で、端部付近に環状溝１２８が形成してある。   The tripod 120 includes a boss 122 and a trunnion journal 126, and is connected to a driven shaft or a drive shaft so that torque can be transmitted through a spline hole 124 formed in an axial center portion of the boss 122. The trunnion journal 126 protrudes in the radial direction from the circumferentially divided position of the boss 122. The trunnion journal 126 has a cylindrical shape, and an annular groove 128 is formed near the end.

各トラニオン・ジャーナル１２６にローラ１３０が回転自在に取り付けてある。トラニオン・ジャーナル１２６とローラ１３０との間に針状ころ１３２が総ころ状態で組み込んである。トラニオン・ジャーナル１２６の円筒形の外周面が針状ころ１３２のための内側軌道面となり、ローラ１３０の円筒形の内周面が針状ころ１３２のための外側軌道面となる。トラニオン・ジャーナル１２６の環状溝１２８にサークリップ１３８を装着することによって、針状ころ１３２およびローラ１３０がトラニオン・ジャーナル１２６の先端側に抜けないように抜け止めがしてある。   A roller 130 is rotatably attached to each trunnion journal 126. Needle rollers 132 are incorporated between the trunnion journal 126 and the roller 130 in a full roller state. The cylindrical outer peripheral surface of the trunnion journal 126 becomes an inner raceway surface for the needle rollers 132, and the cylindrical inner peripheral surface of the roller 130 becomes an outer raceway surface for the needle rollers 132. By attaching a circlip 138 to the annular groove 128 of the trunnion journal 126, the needle rollers 132 and the roller 130 are prevented from coming off to the front end side of the trunnion journal 126.

針状ころ１３２の両端側にインナ・ワッシャ１３４とアウタ・ワッシャ１３６が配置してある。アウタ・ワッシャ１３６は、トラニオン・ジャーナル１２６の半径方向に延びた円盤部と、トラニオン・ジャーナル１２６の軸線方向に延びた円筒部とからなる。環状溝１２８に装着した状態のサークリップ１３８の外径はアウタ・ワッシャ１３６の円盤部の内径より大きいため、トラニオン・ジャーナル１２６の軸端側へのアウタ・ワッシャ１３６の移動が規制される。アウタ・ワッシャ１３６の円筒部の外径は針状ころ１３２の外接円と同じかわずかに小さいため、針状ころ１３２の抜け止めが行われる。また、アウタ・ワッシャ１３６の円筒部の外径はローラ１３０の内径より小さく、端部がローラ１３０の内径よりも大きく拡大している。したがって、ローラ１３０はトラニオン・ジャーナル１２６の軸線方向に一定程度移動することができる。   An inner washer 134 and an outer washer 136 are disposed on both ends of the needle roller 132. The outer washer 136 includes a disc portion extending in the radial direction of the trunnion journal 126 and a cylindrical portion extending in the axial direction of the trunnion journal 126. Since the outer diameter of the circlip 138 attached to the annular groove 128 is larger than the inner diameter of the disk portion of the outer washer 136, the movement of the outer washer 136 toward the shaft end side of the trunnion journal 126 is restricted. Since the outer diameter of the cylindrical portion of the outer washer 136 is the same as or slightly smaller than the circumscribed circle of the needle roller 132, the needle roller 132 is prevented from coming off. Further, the outer diameter of the cylindrical portion of the outer washer 136 is smaller than the inner diameter of the roller 130, and the end portion is larger than the inner diameter of the roller 130. Therefore, the roller 130 can move to a certain extent in the axial direction of the trunnion journal 126.

外輪１１０のトラック溝１１４は外輪１１０の中心軸線と平行な中心軸線をもった部分円筒状で、ローラ１３０の外周面はトラック溝１１４の断面と実質的に同径の球状である。したがって、ローラ１３０はトラック溝１１４内で回転可能である。継手が作動角をとった状態でトルクを伝達するとき、ローラ１３０はトラック溝１１４内を外輪１１０の軸方向に往復移動する。   The track groove 114 of the outer ring 110 has a partial cylindrical shape having a central axis parallel to the central axis of the outer ring 110, and the outer peripheral surface of the roller 130 has a spherical shape substantially the same diameter as the cross section of the track groove 114. Therefore, the roller 130 can rotate in the track groove 114. When torque is transmitted with the joint at an operating angle, the roller 130 reciprocates in the axial direction of the outer ring 110 in the track groove 114.

図４（Ａ）はトリポードの部分横断面を示し、図４（Ｂ）はトラニオン・ジャーナルの
横断面を示す。これらの図では、ハッチングが省略してあり、梨地部分は表面硬化層を表している。すなわち、トリポード１２０のボス部１２２のスプライン孔１２４と、トラニオン・ジャーナル１２６の根元部から外周面にかけて、表面硬化層が形成してある。トラニオン・ジャーナル１２６の外周面は針状ころ１３２が転動する軌道面となる。根元部は針状ころ１３２の端部を支えるインナ・ワッシャ１３４が着座する部分である。 4A shows a partial cross section of the tripod, and FIG. 4B shows a cross section of the trunnion journal. In these drawings, hatching is omitted, and the satin portion represents a hardened surface layer. That is, a hardened surface layer is formed from the spline hole 124 of the boss portion 122 of the tripod 120 and the root portion of the trunnion journal 126 to the outer peripheral surface. The outer peripheral surface of the trunnion journal 126 is a raceway surface on which the needle rollers 132 roll. The root portion is a portion on which the inner washer 134 that supports the end of the needle roller 132 is seated.

内側継手部材（内輪２０／トリポード１２０）はトルク伝達要素（ボール３０／ローラ１３０）と直接または間接に接触する。具体的には、内輪２０はボール溝２６でボール３０と接触し、トリポード１２０は針状ころ１３２を介してローラ１３０と間接的に接触する。したがって、内輪２０のボール溝２６、トリポード１２０は高硬度が要求される。このため、高周波焼入れ・焼もどしにより表面硬化処理を施す。内側継手部材（２０、１２０）の材料は、炭素量が０．４〜０．６ｗｔ％の中炭素鋼である。   The inner joint member (inner ring 20 / tripod 120) is in direct or indirect contact with the torque transmitting element (ball 30 / roller 130). Specifically, the inner ring 20 comes into contact with the ball 30 through the ball groove 26, and the tripod 120 comes into indirect contact with the roller 130 via the needle rollers 132. Therefore, the ball groove 26 and tripod 120 of the inner ring 20 are required to have high hardness. For this reason, surface hardening treatment is performed by induction hardening and tempering. The material of the inner joint member (20, 120) is medium carbon steel having a carbon content of 0.4 to 0.6 wt%.

高周波焼入れ前に調質を行う。調質処理により、硬度をＨＶ２５０以上とする。具体的には、４００〜６００℃の高温焼もどしにより、調質を行った内側継手部材（２０、１２０）の非焼入れ部の組織は、トルースタイト組織あるいはソルバイト組織になり、組織が微細化され、さらに硬度も上昇するため、引張り強度が改善され、内側継手部材（２０、１２０）の強度が向上する。また、繰返し負荷がかかる疲労強度でも、同じ理由で強度が向上する。   Refining before induction hardening. The tempering treatment makes the hardness HV250 or higher. Specifically, the structure of the non-quenched portion of the tempered inner joint member (20, 120) by high temperature tempering at 400 to 600 ° C. becomes a troostite structure or a sorbite structure, and the structure is refined. Further, since the hardness also increases, the tensile strength is improved, and the strength of the inner joint member (20, 120) is improved. Moreover, even if the fatigue strength is subject to repeated loading, the strength is improved for the same reason.

加工精度が必要な場合、旋削前に調質を行い、その後、旋削を行うが、加工の容易性を考慮し、旋削後に調質してもよい。   When machining accuracy is required, tempering is performed before turning, and then turning is performed. However, in consideration of ease of machining, tempering may be performed after turning.

（Ａ）はダブルオフセット型等速自在継手の縦断面図、（Ｂ）は横断面図である。(A) is a longitudinal sectional view of a double offset type constant velocity universal joint, and (B) is a transverse sectional view. （Ａ）は内輪の横断面図、（Ｂ）は図２（Ａ）のＢ−Ｂ断面図である。(A) is a cross-sectional view of the inner ring, (B) is a BB cross-sectional view of FIG. 2 (A). （Ａ）はトリポード型等速自在継手の縦断面図、（Ｂ）は横断面図である。(A) is a longitudinal cross-sectional view of a tripod type constant velocity universal joint, (B) is a cross-sectional view. （Ａ）はトリポードの部分横断面図、（Ｂ）はトラニオン・ジャーナルの横断面図である。(A) is a partial cross-sectional view of a tripod, and (B) is a cross-sectional view of a trunnion journal.

符号の説明Explanation of symbols

１０ 外輪（外側継手部材）
１２ マウス部
１４ 内周面
１６ ボール溝
１８ ステム部
２０ 内輪（内側継手部材）
２２ スプライン孔
２４ 外周面
２６ ボール溝
３０ ボール（トルク伝達要素）
４０ ケージ
４２ ポケット
１１０ 外輪（外側継手部材）
１２ マウス部
１４ トラック溝
１６ ローラ案内面
１８ ステム部
１２０ トリポード（内側継手部材）
１２２ ボス
１２４ スプライン孔
１２６ トラニオン・ジャーナル
１２８ 環状溝
１３０ ローラ（トルク伝達要素）
１３２ 針状ころ
１３４ インナ・ワッシャ
１３６ アウタ・ワッシャ
１３８ サークリップ 10 Outer ring (outer joint member)
12 Mouse part 14 Inner peripheral surface 16 Ball groove 18 Stem part 20 Inner ring (inner joint member)
22 spline hole 24 outer peripheral surface 26 ball groove 30 ball (torque transmission element)
40 Cage 42 Pocket 110 Outer ring (outer joint member)
12 Mouse part 14 Track groove 16 Roller guide surface 18 Stem part 120 Tripod (inner joint member)
122 boss 124 spline hole 126 trunnion journal 128 annular groove 130 roller (torque transmission element)
132 Needle roller 134 Inner washer 136 Outer washer 138 Circlip

Claims (7)

駆動軸または従動軸と接続する外側継手部材と、従動軸または駆動軸と接続する内側継手部材と、外側継手部材と内側継手部材との間に介在してトルクを伝達するトルク伝達要素を具備した等速自在継手の内側継手部材であって、鍛造により成形した後、調質を施し、高周波焼入れにより表面硬化処理を施してある等速自在継手の内側継手部材。   An outer joint member connected to the drive shaft or the driven shaft, an inner joint member connected to the driven shaft or the drive shaft, and a torque transmission element that transmits torque between the outer joint member and the inner joint member. An inner joint member of a constant velocity universal joint, which is formed by forging, tempered, and surface hardened by induction hardening. 前記調質は４００〜６００℃の高温焼もどしである請求項１の等速自在継手の内側継手部材。   The inner joint member of a constant velocity universal joint according to claim 1, wherein the tempering is tempering at a high temperature of 400 to 600 ° C. 炭素０．４〜０．６ｗｔ％を含む炭素鋼で製造された請求項１または２の等速自在継手の内側継手部材。   The inner joint member of the constant velocity universal joint of Claim 1 or 2 manufactured with the carbon steel containing carbon 0.4-0.6 wt%. コア部の硬度がＨＶ２５０以上である請求項１、２または３の等速自在継手の内側継手部材。   The inner joint member of a constant velocity universal joint according to claim 1, 2 or 3, wherein the core portion has a hardness of HV250 or more. コア部の組織がトルースタイトまたはソルバイトである請求項１から４のいずれか１項の等速自在継手の内側継手部材。   The inner joint member of the constant velocity universal joint according to any one of claims 1 to 4, wherein the structure of the core portion is troostite or sorbite. 前記等速自在継手は外輪と内輪の間に介在するケージによって同一平面に保持された複数のボールをトルク伝達要素とするものであり、前記内側継手部材は前記ボールが転動するボール溝を有する内輪である請求項１から５のいずれか１項の等速自在継手の内側継手部材。   The constant velocity universal joint uses a plurality of balls held on the same plane by a cage interposed between an outer ring and an inner ring as a torque transmission element, and the inner joint member has a ball groove on which the ball rolls. The inner joint member of the constant velocity universal joint according to any one of claims 1 to 5, which is an inner ring. 前記等速自在継手はトルク伝達要素としてローラを使用するものであり、前記内側継手部材は前記ローラを回転自在に支持するトラニオン・ジャーナルを有するトリポードである請求項１から５のいずれか１項の等速自在継手の内側継手部材。   6. The constant velocity universal joint uses a roller as a torque transmission element, and the inner joint member is a tripod having a trunnion journal that rotatably supports the roller. Inner joint member of constant velocity universal joint.
JP2008191054A 2008-07-24 2008-07-24 Inner joint member of constant velocity universal joint Expired - Fee Related JP5165488B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256322A (en) * 1992-01-15 1993-10-05 Gkn Automot Ag Constant velocity universal ball joint
JPH10148216A (en) * 1996-11-18 1998-06-02 Ntn Corp Isokinetic universal joint
JP2007064262A (en) * 2005-08-29 2007-03-15 Ntn Corp Constant velocity universal joint
JP2007170423A (en) * 2005-12-19 2007-07-05 Ntn Corp Constant velocity universal joint and its inner member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256322A (en) * 1992-01-15 1993-10-05 Gkn Automot Ag Constant velocity universal ball joint
JPH10148216A (en) * 1996-11-18 1998-06-02 Ntn Corp Isokinetic universal joint
JP2007064262A (en) * 2005-08-29 2007-03-15 Ntn Corp Constant velocity universal joint
JP2007170423A (en) * 2005-12-19 2007-07-05 Ntn Corp Constant velocity universal joint and its inner member

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