JP2008115996A - Tripod type constant velocity universal joint - Google Patents

Tripod type constant velocity universal joint Download PDF

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JP2008115996A
JP2008115996A JP2006301675A JP2006301675A JP2008115996A JP 2008115996 A JP2008115996 A JP 2008115996A JP 2006301675 A JP2006301675 A JP 2006301675A JP 2006301675 A JP2006301675 A JP 2006301675A JP 2008115996 A JP2008115996 A JP 2008115996A
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outer ring
tripod
roller
constant velocity
universal joint
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JP4903533B2 (en
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Hiroshi Murakami
裕志 村上
Takaaki Shibata
貴章 柴田
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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 prevent a tripod kit from falling off from an outer ring. <P>SOLUTION: This tripod type constant velocity universal joint comprises the outer ring 10 having three track grooves 14 in the inner periphery extending to the axial direction and roller guide faces formed on side walls facing the track grooves 14, a tripod member 20 having three trunnion journals 26 protruded to the radial direction, and rollers 30 rotatably supported by the trunnion journals 26 and stored in the track grooves 14 of the outer ring 10. A track clearance is set to be a negative clearance near the opening end of the outer ring. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、自動車や各種産業機械等の動力伝達装置に使用されるトリポード型等速自在継手に関するものである。   The present invention relates to a tripod type constant velocity universal joint used in a power transmission device of an automobile or various industrial machines.

例えば、自動車のエンジンから車輪にトルクを伝達するドライブシャフトでは、その一端がしゅう動型等速自在継手を介してデファレンシャルに連結され、他端が固定型等速自在継手を介して車輪に連結される。ドライブシャフトに使用するしゅう動型等速自在継手としては、例えばトリポード型等速自在継手が知られている。   For example, in a drive shaft that transmits torque from an automobile engine to a wheel, one end of the drive shaft is connected to a differential via a sliding type constant velocity universal joint, and the other end is connected to a wheel via a fixed type constant velocity universal joint. The As a sliding type constant velocity universal joint used for a drive shaft, for example, a tripod type constant velocity universal joint is known.

トリポード型等速自在継手は、図５に示すように、外側継手部材としての外輪１０の内周に、半径方向に突出した３本のトラニオンジャーナル２６を有する内側継手部材としてのトリポード部材２０を収容した構造である。各トラニオンジャーナル２６にはトルク伝達要素としてのローラ３０が回転自在に取り付けてある。ローラ３０は外輪１０の内周に形成したトラック溝１４内に収容され、トラック溝１４の側壁面（ローラ案内面）に沿って外輪１０の軸方向に転動可能である。これにより、駆動側と従動側の２軸間で軸方向変位（プランジング）が許容される。   As shown in FIG. 5, the tripod type constant velocity universal joint accommodates a tripod member 20 as an inner joint member having three trunnion journals 26 projecting radially on the inner periphery of the outer ring 10 as an outer joint member. This is the structure. A roller 30 as a torque transmission element is rotatably attached to each trunnion journal 26. The roller 30 is accommodated in a track groove 14 formed on the inner periphery of the outer ring 10, and can roll in the axial direction of the outer ring 10 along the side wall surface (roller guide surface) of the track groove 14. This allows axial displacement (plunging) between the two axes of the drive side and the driven side.

ところで、例えばドライブシャフトを車体に組み付ける工程等においては、ドライブシャフトを傾けたり垂直にせざるを得ない場合がある。そして、トリポード型等速自在継手を上にすると、重みで外輪１０からトリポード部材２０が脱落するおそれがある。したがって、従来、トリポード部材２０の抜け止め対策として、外輪１０の開口部内周にクリップ（図示省略）を装着している。すなわち、外輪１０の内周面に円形の係合溝を形成してそこにサークリップを装着し、このサークリップをローラ３０に干渉させることによって、トリポード部材２０の抜けを防止するのである。   By the way, for example, in the process of assembling the drive shaft to the vehicle body, the drive shaft may have to be tilted or made vertical. When the tripod type constant velocity universal joint is turned up, the tripod member 20 may fall off the outer ring 10 due to the weight. Therefore, conventionally, a clip (not shown) is attached to the inner periphery of the opening of the outer ring 10 as a measure for preventing the tripod member 20 from coming off. That is, a circular engagement groove is formed on the inner peripheral surface of the outer ring 10, a circlip is attached thereto, and this circlip is caused to interfere with the roller 30, thereby preventing the tripod member 20 from coming off.

また、特許文献１には、外輪の開放端において、端面がカップ内の面積を減少させる隆起した部分を形成するカシメを備えており、この隆起した部分で抜け止めをすることが提案されている。特許文献２には、外輪のローラ案内面を、開口部近傍を残して熱処理により硬化させ、上記開口部近傍の未硬化部に塑性変形によってローラと干渉可能の突出部を形成することが提案されている。
特開平１１−３３６７８２号公報 特開２００２−２３５７６６号公報 Patent Document 1 proposes that the open end of the outer ring is provided with a crimp that forms a raised portion whose end surface reduces the area in the cup, and the raised portion is used to prevent it from coming off. . Patent Document 2 proposes that the roller guide surface of the outer ring is cured by heat treatment leaving the vicinity of the opening, and a protrusion that can interfere with the roller is formed by plastic deformation in the uncured part near the opening. ing.
Japanese Patent Application Laid-Open No. 11-336782 JP 2002-235766 A

しゅう動式等速自在継手の内部部品（たとえばトリポード型等速自在継手の場合はトリポードキット（２０，３０，３２））が外輪１０から脱落しないようにするための対策として、特許文献１および特許文献２に記載された抜け止めは、抜け止め用クリップを装着する方法に比べて、部品点数が増えないためコストメリットがあるが、課題もある。すなわち、特許文献１のものは、隆起した部分は開放端であるため破れやすいブーツに近く、ブーツと干渉しないように加工する必要があり、加工が難しい。特許文献２のものは、ローラ案内面は面であるため、塑性変形による突出部の成形が難しい。   As a countermeasure for preventing the internal parts of the sliding type constant velocity universal joint (for example, tripod kit (20, 30, 32) in the case of a tripod type constant velocity universal joint) from dropping from the outer ring 10, Patent Document 1 and Patent The retainer described in Document 2 has a cost advantage because the number of parts does not increase as compared with a method of attaching a retainer clip, but has a problem. That is, since the raised part is an open end, the thing of patent document 1 is close to the boot which is easy to tear, and it is necessary to process so that it may not interfere with a boot, and processing is difficult. In Patent Document 2, since the roller guide surface is a surface, it is difficult to form the protruding portion by plastic deformation.

この発明の目的は、上述の問題点を除去しつつ、外輪からトリポードキットが脱落することを防止することである。   The object of the present invention is to prevent the tripod kit from falling off the outer ring while eliminating the above-mentioned problems.

この発明は、トラックすきま（トラック溝とローラとの間のすきま）を外輪の開放端付近で負すきまとすることによって課題を解決した。すなわち、この発明のトリポード型等速自在継手は、内周に軸方向に延びる３本のトラック溝を有し、各トラック溝の向かい合った側壁にローラ案内面を形成した外輪と、半径方向に突出した３本のトラニオンジャーナルを有するトリポード部材と、各トラニオンジャーナルに回転自在に担持され外輪のトラック溝内に収容されるローラとを備え、トラックすきまが外輪開放端において負すきまとなるように設定してあることを特徴とする。   The present invention solves the problem by making the track clearance (the clearance between the track groove and the roller) a negative clearance near the open end of the outer ring. That is, the tripod type constant velocity universal joint of the present invention has three track grooves extending in the axial direction on the inner periphery, and an outer ring having a roller guide surface formed on opposite side walls of each track groove, and a radial protrusion. The tripod member having three trunnion journals and a roller rotatably supported on each trunnion journal and housed in the track groove of the outer ring are set so that the track clearance becomes a negative clearance at the outer ring open end. It is characterized by being.

トリポードキットを外輪に組み込む際には、外輪のトラック溝にローラをかち込むことにより通過させる（請求項２）。   When the tripod kit is assembled into the outer ring, the roller is inserted into the track groove of the outer ring (claim 2).

トリポードキットを外輪に組み込む際に、外輪開放端付近に外径３方向から力を加え、弾性変形によりトラックすきまを拡げてローラを通過させる（請求項３）。   When the tripod kit is assembled into the outer ring, a force is applied from the three directions of the outer diameter near the open end of the outer ring, and the track clearance is expanded by elastic deformation to pass the roller.

この発明によれば、外輪からトリポードキットが脱落することを防止することができる。そして、特許文献１のものと比較して、開放端には加工を施さないため、ブーツが破れる心配がなく、しかも特別な加工を必要としないため、加工が容易である。また、特許文献２のものと比較して、突出部の成形等の特別な加工を必要としないため、加工が容易である。   According to this invention, it is possible to prevent the tripod kit from falling off the outer ring. And compared with the thing of patent document 1, since it does not give a process to an open end, there is no fear that a boot will be torn, and since a special process is not needed, a process is easy. Further, as compared with that of Patent Document 2, no special processing such as molding of the protruding portion is required, so that processing is easy.

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

図５を参照して基本構造を説明すると、トリポード型等速自在継手は、外側継手部材としての外輪１０と、内側継手部材としてのトリポード部材２０と、トルク伝達要素としてのローラ３０を主要な構成要素としている。連結すべき２軸のうちの一方を外輪１０と結合し、他方をトリポード部材２０と結合する。   The basic structure will be described with reference to FIG. 5. The tripod type constant velocity universal joint mainly includes an outer ring 10 as an outer joint member, a tripod member 20 as an inner joint member, and a roller 30 as a torque transmission element. As an element. One of the two shafts to be coupled is coupled to the outer ring 10 and the other is coupled to the tripod member 20.

外輪１０はマウス部１２とステム部１６とからなり、ステム部１６のスプライン（またはセレーション。以下同じ。）軸１８で、連結すべき２軸のうちの一方とトルク伝達可能に結合するようになっている。マウス部１２はカップ状で、内周に軸方向に延びる３本のトラック溝１２が円周方向に等間隔に形成してある。各トラック溝１２の円周方向で向かい合った側壁がローラ案内面１４となる。   The outer ring 10 includes a mouse portion 12 and a stem portion 16, and is coupled to one of the two shafts to be connected by a spline (or serration, the same applies hereinafter) shaft 18 of the stem portion 16 so that torque can be transmitted. ing. The mouse portion 12 is cup-shaped, and three track grooves 12 extending in the axial direction on the inner periphery are formed at equal intervals in the circumferential direction. Side walls facing each other in the circumferential direction of each track groove 12 serve as a roller guide surface 14.

トリポード部材２０はボス２２と３本のトラニオンジャーナル２６からなり、トラニオンジャーナル２６はボス２２の円周方向等配位置から半径方向に突出している。ボス２２は中心部に形成したスプライン孔２４で連結すべき２軸のうちの他方とトルク伝達可能に結合するようになっている。   The tripod member 20 includes a boss 22 and three trunnion journals 26, and the trunnion journal 26 projects radially from the circumferentially equidistant position of the boss 22. The boss 22 is coupled to the other of the two shafts to be connected by a spline hole 24 formed in the center so as to transmit torque.

ローラ３０はトラニオンジャーナル２６に針状ころ３２を介して回転可能に担持されている。ローラ３０は外輪１０のトラック溝１２内に収容され、ローラ３０の外周面はローラ案内面に適合する凸曲面である。   The roller 30 is rotatably supported on the trunnion journal 26 via needle rollers 32. The roller 30 is accommodated in the track groove 12 of the outer ring 10, and the outer peripheral surface of the roller 30 is a convex curved surface that fits the roller guide surface.

外輪１０からトリポードキット（２０，３０，３２）が脱落することを防止するため、トラックすきま（トラック溝１４とローラ３０との間のすきま）を外輪１０の開放端付近では負すきまとする。具体的には、図１に点線で示した外輪１０の開放端付近において、トラックすきまが負となるように設定し、その他の部位では従来どおりの正すきまとなるように設定しておく。図２は、図１のII−II線から見たトラック溝１４とローラ３０の位置関係を示し、トラック溝１４の幅寸法をｂで、外輪１０の開放端付近のトラック溝１４の幅寸法をｂ′、ローラ３０の外径をφｄで表してある。そして、これらの寸法関係を、ｂ−ｄ＞０、かつ、ｂ′−ｄ＜０となるように設定してある。   In order to prevent the tripod kit (20, 30, 32) from falling off the outer ring 10, the track clearance (the clearance between the track groove 14 and the roller 30) is a negative clearance near the open end of the outer ring 10. Specifically, the track clearance is set to be negative in the vicinity of the open end of the outer ring 10 indicated by the dotted line in FIG. 1, and the conventional positive clearance is set to other portions. 2 shows the positional relationship between the track groove 14 and the roller 30 as viewed from the line II-II in FIG. 1. The width dimension of the track groove 14 is b, and the width dimension of the track groove 14 near the open end of the outer ring 10 is shown. b ′, the outer diameter of the roller 30 is represented by φd. These dimensional relationships are set such that bd> 0 and b′−d <0.

次に、トリポードキット（２０，３０，３２）の外輪１０への組み込み方法について図３、図４を用いて説明する。図３に示すように、トリポードキット（２０，３０，３２）を外輪１０に組み込む際に、ローラ３０に対して図中矢印方向に力を加えてかち込み、ローラ３０と外輪１０の弾性変形を利用して外輪１０の開放端付近のローラ３０とトラック溝１４の負すきまの部位を通過させる。   Next, a method of incorporating the tripod kit (20, 30, 32) into the outer ring 10 will be described with reference to FIGS. As shown in FIG. 3, when the tripod kit (20, 30, 32) is assembled into the outer ring 10, the roller 30 and the outer ring 10 are elastically deformed by applying force to the roller 30 in the direction of the arrow in the figure. By utilizing this, the roller 30 near the open end of the outer ring 10 and the negative clearance between the track grooves 14 are passed.

また、図４に示すように、トリポードキット（２０，３０，３２）を外輪１０に組み込む際に、外輪１０に対して、外輪１０の開放端付近において、内向きの大矢印で示す３方向から力を加え、外輪１０を弾性変形でたわませる。そして、外輪１０のトラック溝１４が外向きの小矢印の方向にたわんで広がった状態（外輪開放端付近のローラと外輪トラックの負すきまの部位のすきまを広げて正すきまとする）でローラ３０を通過させる。ローラ３０が通過した後は大矢印で示した力を解放すれば外輪１０が復元し、トリポードキット（２０，３０，３２）が脱落することはない。   Further, as shown in FIG. 4, when the tripod kit (20, 30, 32) is assembled into the outer ring 10, the outer ring 10 is viewed from three directions indicated by large inward arrows in the vicinity of the open end of the outer ring 10. A force is applied and the outer ring 10 is bent by elastic deformation. Then, the roller 30 in a state in which the track groove 14 of the outer ring 10 is bent and expanded in the direction of the outward small arrow (the roller near the open end of the outer ring and the negative clearance portion of the outer ring track is widened to be a positive clearance). Pass through. After the roller 30 has passed, if the force indicated by the large arrow is released, the outer ring 10 is restored and the tripod kit (20, 30, 32) does not fall off.

この発明の実施の形態を示すトリポード型等速自在継手の縦断面図The longitudinal cross-sectional view of the tripod type constant velocity universal joint which shows embodiment of this invention 外輪のトラック溝とローラの位置関係を示す図１のII−II矢視図II-II arrow view of FIG. 1 showing the positional relationship between the outer ring track groove and the roller ローラの組み込み過程を示す図２と類似の図Figure similar to Figure 2 showing the roller assembly process 外輪の端面図End view of outer ring トリポード型等速自在継手の縦断面図、（Ｂ）は端面図Vertical section of tripod type constant velocity universal joint, (B) is an end view

符号の説明Explanation of symbols

１０ 外輪（外側継手部材）
１２ マウス部
１４ トラック溝
１６ ステム部
１８ スプライン軸
２０ トリポード部材（内側継手部材）
２２ ボス
２４ スプライン孔
２６ トラニオンジャーナル
２８ 輪溝
３０ ローラ（トルク伝達要素）
３２ 針状ころ
３４ インナワッシャ
３６ アウタワッシャ
３８ サークリップ 10 Outer ring (outer joint member)
12 Mouse part 14 Track groove 16 Stem part 18 Spline shaft 20 Tripod member (inner joint member)
22 Boss 24 Spline hole 26 Trunnion journal 28 Ring groove 30 Roller (torque transmission element)
32 Needle roller 34 Inner washer 36 Outer washer 38 Circlip

Claims (3)

内周に軸方向に延びる３本のトラック溝を有し、各トラック溝の向かい合った側壁にローラ案内面を形成した外輪と、半径方向に突出した３本のトラニオンジャーナルを有するトリポード部材と、各トラニオンジャーナルに回転自在に担持され外輪のトラック溝内に収容されるローラとを備え、トラックすきまが外輪開放端において負すきまとなるように設定してあるトリポード型等速自在継手。   An outer ring having three track grooves extending in the axial direction on the inner periphery, and a roller guide surface formed on opposite side walls of each track groove; a tripod member having three trunnion journals projecting in the radial direction; A tripod type constant velocity universal joint that includes a roller that is rotatably supported by a trunnion journal and is accommodated in a track groove of the outer ring, and the track clearance is set to be a negative clearance at the outer ring open end. トリポードキットを外輪に組み込む際に、外輪のトラック溝にローラをかち込むことにより通過させることを特徴とする請求項１のトリポード型等速自在継手。   2. The tripod type constant velocity universal joint according to claim 1, wherein when the tripod kit is incorporated in the outer ring, the tripod kit is passed through by pushing a roller into a track groove of the outer ring. トリポードキットを外輪に組み込む際に、外輪開放端付近に外径３方向から力を加え、弾性変形によりトラックすきまを拡げてローラを通過させることを特徴とする請求項１のトリポード型等速自在継手。   The tripod type constant velocity universal joint according to claim 1, wherein when the tripod kit is assembled into the outer ring, force is applied from three directions of the outer diameter near the open end of the outer ring, and the track clearance is expanded by elastic deformation to pass the roller. .
JP2006301675A 2006-11-07 2006-11-07 Assembling method of tripod type constant velocity universal joint Expired - Fee Related JP4903533B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830027A (en) * 1981-08-14 1983-02-22 株式会社山武 Proximity switch
JPH11336782A (en) * 1998-05-04 1999-12-07 Gkn Loebro Gmbh Constant speed push-in joint furnished with disassembly preventing means
JP2003097589A (en) * 2001-09-26 2003-04-03 Ntn Corp Constant velocity universal joint
JP2006153135A (en) * 2004-11-29 2006-06-15 Toyoda Mach Works Ltd Constant-speed joint, and machining method, assembling method, and its assembling tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830027A (en) * 1981-08-14 1983-02-22 株式会社山武 Proximity switch
JPH11336782A (en) * 1998-05-04 1999-12-07 Gkn Loebro Gmbh Constant speed push-in joint furnished with disassembly preventing means
JP2003097589A (en) * 2001-09-26 2003-04-03 Ntn Corp Constant velocity universal joint
JP2006153135A (en) * 2004-11-29 2006-06-15 Toyoda Mach Works Ltd Constant-speed joint, and machining method, assembling method, and its assembling tool

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