JP2002235766A - Tripod type constant velocity universal joint - Google Patents
Tripod type constant velocity universal jointInfo
- Publication number
- JP2002235766A JP2002235766A JP2001032497A JP2001032497A JP2002235766A JP 2002235766 A JP2002235766 A JP 2002235766A JP 2001032497 A JP2001032497 A JP 2001032497A JP 2001032497 A JP2001032497 A JP 2001032497A JP 2002235766 A JP2002235766 A JP 2002235766A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- tripod
- constant velocity
- type constant
- velocity universal
- 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.)
- Pending
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
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
- F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
- F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、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る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tripod type constant velocity universal joint used for a power transmission device of an automobile or various industrial machines.
【0002】[0002]
【従来の技術】例えば、自動車のエンジンからの回転動
力を車輪に伝達するドライブシャフトでは、その一端が
摺動型等速自在継手を介してディ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。ドライブシャフトの一端に使用する摺動型等速自
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。2. Description of the Related Art For example, in a drive shaft for transmitting rotational power from an automobile engine to wheels, one end thereof is connected to a differential through a sliding type constant velocity universal joint, and the other end is a fixed type constant velocity universal joint. Connected to the wheels via As a sliding type constant velocity universal joint used at one end of a drive shaft, for example, a tripod type constant velocity universal joint is known.
【0003】このトリポード型等速自在継手は、図7に
示すように、外側継手部材100の内周に、半径方向に
突出した三本の脚軸220を有するトリポード部材20
0を収容した構造である。各脚軸220の外周にはロー
ラ340が回転自在に取り付けられており、このローラ
340を外側継手部材100の内周に形成された三本の
トラック溝120に収容した状態で、各トラック溝12
0のローラ案内面140でローラ340を軸方向に案内
することにより、駆動側および従動側の二軸間での軸方
向変位(プランジング)が許容される。As shown in FIG. 7, this tripod type constant velocity universal joint has a tripod member 20 having three leg shafts 220 protruding in the radial direction on the inner periphery of an outer joint member 100.
0 is accommodated. A roller 340 is rotatably mounted on the outer periphery of each leg shaft 220, and the roller 340 is accommodated in three track grooves 120 formed on the inner periphery of the outer joint member 100.
By axially guiding the roller 340 with the zero roller guide surface 140, axial displacement (plunging) between the two axes on the driving side and the driven side is allowed.
【0004】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。この際、トリ
ポード型等速自在継手を上にすると、重みで外側継手部
材100の内周からトリポード部材200が脱落するお
それがあるので、従来では、トリポード部材200の抜
け止め対策として、外側継手部材100の開口部内周に
クリップ500を装着している。すなわち、外側継手部
材100の内周面に形成した円形の係合溝160にサー
クリップ500を係合させ、サークリップ500をロー
ラ340に干渉させることによって、トリポード部材2
00の抜けを防止するのである。[0004] By the way, for example, in a process of assembling a drive shaft to a vehicle body, there is a case where the drive shaft has to be inclined or made vertical. At this time, if the tripod-type constant velocity universal joint is raised, the tripod member 200 may fall off from the inner periphery of the outer joint member 100 by weight. The clip 500 is attached to the inner periphery of the opening of the opening 100. That is, the circlip 500 is engaged with the circular engagement groove 160 formed on the inner peripheral surface of the outer joint member 100, and the circlip 500 interferes with the roller 340.
00 is prevented.
【0005】[0005]
【発明が解決しようとする課題】近年では、軽量化等の
観点から、いわゆる花型の外側継手部材、すなわち図8
〜図10に示すように、隣接するローラ340間の部分
を絞って小径に形成した外側継手部材100’を使用す
るケースが増えている。しかしながら、この種の花型外
側継手部材100’では、大径部190の内周120に
沿って円形の係合溝を形成することはできない。In recent years, a so-called flower-shaped outer joint member, that is, FIG.
As shown in FIG. 10, the use of the outer joint member 100 ′ having a small diameter by narrowing a portion between the adjacent rollers 340 is increasing. However, in this type of flower-shaped outer joint member 100 ′, a circular engagement groove cannot be formed along the inner periphery 120 of the large-diameter portion 190.
【0006】この場合の抜け止め対策としては、図8
に示すように、各小径部180の内周に円弧状の係合溝
160を形成し、この係合溝160に円環状のサークリ
ップ500を嵌合したもの、図9に示すように、サー
クリップ500を小径部180内周の係合溝160に嵌
合すると共に、サークリップ500を外側継手部材10
0の大径部190の内周形状に沿う異形形状としたも
の、あるいは図10に示すように、小径部180の係
合溝160を大径部190の内周に滑らかにつながるス
トレート形状とし、サークリップ500を係合溝160
に対応したストレート部分510と大径部190内周に
対応した円弧部分520とで構成したもの、等が知られ
ている。FIG. 8 shows a countermeasure against the slippage in this case.
As shown in FIG. 9, an arc-shaped engagement groove 160 is formed on the inner periphery of each small diameter portion 180, and an annular circlip 500 is fitted into this engagement groove 160. As shown in FIG. The clip 500 is fitted into the engagement groove 160 on the inner periphery of the small diameter portion 180 and the circlip 500 is connected to the outer joint member 10.
0, or a straight shape that smoothly connects the engaging groove 160 of the small diameter portion 180 to the inner periphery of the large diameter portion 190, as shown in FIG. Insert the circlip 500 into the engagement groove 160
, And an arc portion 520 corresponding to the inner periphery of the large-diameter portion 190 are known.
【0007】しかしながら、図8の対策では、サークリ
ップ500が脚軸220の軸方向においてローラ340
外周の曲率中心付近でローラ340と干渉するため、二
軸間の許容プランジング量が図7の構造に比べて小さく
なり、結果的に外側継手部材100の軸方向寸法を長く
せざるを得ないという不具合がある。また、図9の抜け
止め構造では、異形クリップ500の成形コストが増大
すると共に、上記と同様にサークリップ500がローラ
340の曲率中心付近でローラ340と干渉するため、
外側継手部材100の軸方向寸法が長くなる。また、図
10に示す構造では、サークリップ500や係合溝16
0が異形であるため、これらの加工コストや加工工数が
増大するという不具合がある。However, in the countermeasure shown in FIG. 8, the circlip 500 moves the roller 340 in the axial direction of the leg shaft 220.
Since it interferes with the roller 340 in the vicinity of the center of curvature of the outer periphery, the allowable plunging amount between the two axes becomes smaller than that in the structure of FIG. There is a problem that. Further, in the retaining structure of FIG. 9, the molding cost of the deformed clip 500 increases, and the circlip 500 interferes with the roller 340 near the center of curvature of the roller 340 as described above.
The axial dimension of the outer joint member 100 becomes longer. Further, in the structure shown in FIG.
Since 0 is an irregular shape, there is a problem that these processing costs and processing steps are increased.
【0008】そこで、本発明は、円筒型や花型といった
外側継手部材の形状に左右されることなく、トリポード
部材の抜けを確実に防止でき、しかもこれを低コストに
実現できる高寿命のトリポード型等速自在継手の提供を
目的とする。Therefore, the present invention provides a tripod type having a long life which can reliably prevent the tripod member from coming off without being influenced by the shape of the outer joint member such as a cylindrical type or a flower type, and can realize this at low cost. The purpose is to provide constant velocity universal joints.
【0009】[0009]
【課題を解決するための手段】上記目的の達成のため、
本発明では、内周に軸方向の三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
した外側継手部材と、半径方向に突出した三本の脚軸を
有するトリポード部材と、各脚軸の外周に複数の針状こ
ろを介して回転自在に取り付けられ、外側継手部材のト
ラック溝内に収容されたローラとを備え、ローラをロー
ラ案内面によって案内するトリポード型等速自在継手に
おいて、ローラ案内面を、外側継手部材の開口部近傍を
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
した。In order to achieve the above object,
In the present invention, the inner circumference has three track grooves in the axial direction,
An outer joint member having roller guide surfaces formed on opposing side walls of each track groove, a tripod member having three leg shafts protruding in the radial direction, and rotating through a plurality of needle rollers on an outer periphery of each leg shaft. A tripod-type constant velocity universal joint that is freely mounted and includes a roller housed in a track groove of the outer joint member, and guides the roller by a roller guide surface. The remaining portion was cured by heat treatment, and a protruding portion capable of interfering with the roller was formed in the uncured portion near the opening by plastic deformation.
【0010】トリポード型等速自在継手においては、ロ
ーラがローラ案内面上を軸方向に転動しながらトルクを
伝達するため、ローラ案内面には高い転動疲労寿命が要
求される。ローラ案内面を上記のように熱処理で硬化さ
せると、転動疲労寿命を高めることができ、継手寿命や
トルク容量の増大を図ることができる。In the tripod type constant velocity universal joint, since the roller transmits torque while rolling on the roller guide surface in the axial direction, the roller guide surface is required to have a long rolling fatigue life. When the roller guide surface is hardened by the heat treatment as described above, the rolling fatigue life can be increased, and the joint life and torque capacity can be increased.
【0011】外側継手部材の開口部近傍のローラ案内面
に、塑性変形によってローラと干渉可能の突出部を形成
すれば、ローラが外側継手部材の開口部近傍まで移動し
た際に突出部と干渉するため、開口側へのそれ以上の移
動が規制され、トリポード部材の抜け止めがなされる。
この突出部は、加締め等でローラ案内面を塑性変形させ
ることにより、簡易にかつ低コストに形成することがで
きる。ローラ案内面の塑性変形は、外側継手部材の内周
形状と無関係に行えるから、外側継手部材の外観形状
(円筒型あるいは花型等)を問わず、良好な抜け止め効
果を得ることができる。If a protrusion is formed on the roller guide surface near the opening of the outer joint member by plastic deformation so as to be able to interfere with the roller, the roller interferes with the protrusion when the roller moves to the vicinity of the opening of the outer joint member. Therefore, further movement to the opening side is restricted, and the tripod member is prevented from coming off.
This protrusion can be easily and inexpensively formed by plastically deforming the roller guide surface by caulking or the like. Since the plastic deformation of the roller guide surface can be performed irrespective of the inner peripheral shape of the outer joint member, a good retaining effect can be obtained regardless of the outer shape (cylindrical or flower shape) of the outer joint member.
【0012】上述のようにローラ案内面は熱処理によっ
て硬化されるが、突出部の形成部分にも硬化処理がなさ
れていると、延性不足によって塑性変形の際に母材割れ
を起こす懸念がある。この場合、外側継手部材の開口部
近傍を除いて熱処理を行うことにより、当該開口部近傍
に硬化したローラ案内面より硬度が低くかつ延性に富む
未硬化部を形成し、この未硬化部を塑性変形させて突出
部を形成すれば、塑性変形に伴う母材割れを回避するこ
とができる。母材割れを確実に防止するため、未硬化部
の表面硬度は、ロックウェル硬さ(Cスケール試験:以
下同じ)でHRc40以下に設定するのが望ましい。Although the roller guide surface is hardened by the heat treatment as described above, if the hardening process is also performed on the portion where the protrusion is formed, there is a concern that the base material may be cracked at the time of plastic deformation due to insufficient ductility. In this case, by performing heat treatment except for the vicinity of the opening of the outer joint member, an uncured portion having a lower hardness and a higher ductility than the hardened roller guide surface is formed near the opening, and this uncured portion is plastically deformed. If the projection is formed by deformation, it is possible to avoid base material cracking due to plastic deformation. In order to reliably prevent base material cracking, the surface hardness of the uncured portion is desirably set to a Rockwell hardness (C scale test: the same applies hereinafter) of HRc 40 or less.
【0013】突出部は、二軸間に作動角をとった状態で
も確実な抜け止め効果が得られるよう、各トラック溝に
少なくとも一つずつ形成するのが望ましい。It is desirable that at least one projecting portion is formed in each track groove so that a reliable retaining effect can be obtained even when an operating angle is set between the two shafts.
【0014】ローラ案内面の熱処理としては、種々の硬
化処理を適用することができる。その中でも特に高周波
焼入れは、局部加熱が可能で硬化層深さの選定が自由で
あり、また硬化層以外には著しく熱影響を与えないよう
に制御できるので母材の性能を保持できる等の利点を有
する。そのため、上述のように外側継手部材の開口部近
傍を除いてローラ案内面を硬化させる場合の熱処理方法
として好適である。As the heat treatment of the roller guide surface, various hardening treatments can be applied. Among them, induction quenching is particularly advantageous in that local heating can be performed, the depth of the hardened layer can be freely selected, and the performance of the base material can be maintained because it can be controlled so as not to significantly affect the heat other than the hardened layer. Having. Therefore, it is suitable as a heat treatment method for curing the roller guide surface except for the vicinity of the opening of the outer joint member as described above.
【0015】トリポード型等速自在継手においては、ロ
ーラとローラ案内面との間の隙間、つまりローラ直径と
互いに向かい合った案内面間の距離との差は概ね0.2
mm程度に設定される。従って、突出部の脚軸内径側へ
の突出幅を0.5mm以上にしておけば、突出部を確実
にローラに干渉させることができる。In the tripod type constant velocity universal joint, the gap between the roller and the roller guide surface, that is, the difference between the roller diameter and the distance between the opposing guide surfaces is approximately 0.2.
mm. Therefore, if the protrusion width of the protrusion to the leg shaft inner diameter side is set to 0.5 mm or more, the protrusion can be surely interfered with the roller.
【0016】トリポード型等速自在継手を用いたドライ
ブシャフトは、トリポード型等速自在継手の他、固定型
等速自在継手と両継手間に介在させたシャフトとで構成
される。このドライブシャフトにおいて、トリポード型
等速自在継手を上にすると、トリポード部材にはその自
重の他、シャフト、および固定型等速自在継手の重量が
外側継手部材から抜け出る方向の力として作用する。こ
の時の引抜き力は、490N以下であるので、トリポー
ド部材の抜けを確実に規制するため、突出部は490N
以上の引抜き耐力を有するものとするのが望ましい。A drive shaft using a tripod type constant velocity universal joint is composed of a tripod type constant velocity universal joint, a fixed type constant velocity universal joint, and a shaft interposed between the two joints. In this drive shaft, when the tripod type constant velocity universal joint is placed on the upper side, the weight of the shaft and the fixed type constant velocity universal joint acts on the tripod member in addition to its own weight as a force in the direction of coming off from the outer joint member. Since the pulling force at this time is 490 N or less, the protrusion is 490 N in order to reliably prevent the tripod member from coming off.
It is desirable to have the above pull-out strength.
【0017】[0017]
【発明の実施の形態】以下、本発明の実施形態を図1〜
図6に基づいて説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explanation will be given based on FIG.
【0018】図1および図2に示すように、トリポード
型等速自在継手は、外側継手部材10とトリポード部材
20とを主体として構成される。連結すべき二軸のうち
の一方が外側継手部材10と連結され、他方が半径方向
に突出した三本の脚軸22を有するトリポード部材20
と連結される。As shown in FIGS. 1 and 2, the tripod type constant velocity universal joint mainly includes an outer joint member 10 and a tripod member 20. One of the two shafts to be connected is connected to the outer joint member 10 and the other is a tripod member 20 having three radially protruding leg shafts 22.
Is linked to
【0019】外側継手部材10は概ねカップ状の外観を
なし、内周部に軸方向に延びる三本のトラック溝12が
円周等配位置に形成されている。各トラック溝12の円
周方向で向かい合った側壁にそれぞれローラ案内面14
が形成されている。トリポード部材20の各脚軸22に
はローラ34が取り付けてあり、このローラ34が外側
継手部材10のトラック溝12内に収容される。ローラ
34の外周面34aはローラ案内面14に適合する凸曲
面である。The outer joint member 10 has a generally cup-like appearance, and three track grooves 12 extending in the axial direction are formed in the inner peripheral portion at circumferentially equal positions. Roller guide surfaces 14 are respectively provided on circumferentially opposite side walls of each track groove 12.
Are formed. A roller 34 is attached to each leg 22 of the tripod member 20, and the roller 34 is housed in the track groove 12 of the outer joint member 10. The outer peripheral surface 34 a of the roller 34 is a convex curved surface that matches the roller guide surface 14.
【0020】この実施形態では、ローラ34の外周面3
4aは脚軸22の軸線から半径方向に離れた位置に曲率
中心を有する円弧を母線とする凸曲面であり、ローラ案
内面14の断面形状はゴシックアーチ形状であって、こ
れによりローラ34の外周面34aとローラ案内面14
とがアンギュラコンタクトをなす。球状のローラ外周面
34aに対してローラ案内面14の断面形状をテーパ形
状としても両者のアンギュラコンタクトが実現する。こ
のようにローラ外周面34aとローラ案内面14とがア
ンギュラコンタクトをなす構成を採用することによっ
て、ローラが振れにくくなるため姿勢が安定する。な
お、アンギュラコンタクトを採用しない場合には、例え
ばローラ案内面14を軸線が外側継手部材10の軸線と
平行な円筒面の一部で構成し、その断面形状をローラ3
4の外周面34aの母線に対応する円弧とすることもで
きる。In this embodiment, the outer peripheral surface 3 of the roller 34
Reference numeral 4a denotes a convex curved surface having an arc having a center of curvature at a position radially away from the axis of the leg shaft 22 and having a generatrix as a generatrix. The cross-sectional shape of the roller guide surface 14 is a Gothic arch shape. Surface 34a and roller guide surface 14
And make an angular contact. Even when the cross-sectional shape of the roller guide surface 14 is tapered with respect to the spherical roller outer peripheral surface 34a, angular contact between the two can be realized. By adopting a configuration in which the roller outer peripheral surface 34a and the roller guide surface 14 form an angular contact, the roller is less likely to oscillate, so that the posture is stabilized. When the angular contact is not used, for example, the roller guide surface 14 is formed by a part of a cylindrical surface whose axis is parallel to the axis of the outer joint member 10, and the cross-sectional shape thereof is
4 may be an arc corresponding to the generatrix of the outer peripheral surface 34a.
【0021】脚軸22の外周面には支持リング32が外
嵌される。この支持リング32とローラ34とは、複数
のニードルローラ(針状ころ)36を介してユニット化
され、ローラ34が支持リング32に対して相対回転可
能なローラアセンブリを構成している。すなわち、支持
リング32の円筒型外周面を内側軌道面とし、ローラ3
4の円筒型内周面を外側軌道面として、これらの内外軌
道面間にニードルローラ36が転動自在に介在する。ニ
ードルローラ36は、できるだけ多くのころを入れた、
保持器のない、いわゆる総ころ状態で組み込まれてい
る。符号38で示してあるのは、ニードルローラ36の
抜け落ち止めの一対のワッシャである。ワッシャ38
は、ローラ34の内周面に形成した環状溝に装着され、
ワッシャ38の内径寸法は、ローラ34の首振り揺動時
に脚軸22と干渉しないよう脚軸22の外径寸法よりも
大きくなっている。A support ring 32 is fitted on the outer peripheral surface of the leg shaft 22. The support ring 32 and the roller 34 are unitized via a plurality of needle rollers (needle rollers) 36, and constitute a roller assembly in which the roller 34 can rotate relative to the support ring 32. That is, the cylindrical outer peripheral surface of the support ring 32 is used as the inner raceway surface, and the roller 3
With the cylindrical inner peripheral surface of No. 4 as an outer raceway surface, a needle roller 36 is rotatably interposed between these inner and outer raceway surfaces. The needle roller 36 has as many rollers as possible,
It is installed in a so-called full roller state without a retainer. Reference numeral 38 denotes a pair of washers for preventing the needle roller 36 from falling off. Washer 38
Is mounted in an annular groove formed on the inner peripheral surface of the roller 34,
The inner diameter of the washer 38 is larger than the outer diameter of the leg shaft 22 so as not to interfere with the leg shaft 22 when the roller 34 swings.
【0022】支持リング32の内周面32cは円弧状凸
断面を有する。この支持リング32の内周面32cを脚
軸22の外周面(例えば軸線と平行なストレート形状
で、その横断面は楕円あるいは真円である)に外嵌する
ことにより、支持リング32が脚軸22の軸方向で移動
可能となるばかりでなく、脚軸22に対して首振り揺動
自在となる。また、上述のとおり支持リング32とロー
ラ34はニードルローラ36を介して相対回転自在にア
ッセンブリ(ユニット化)されているため、脚軸22に
対し、支持リング32とローラ34がユニットとして首
振り揺動可能な関係にある。ここで、首振りとは、脚軸
22の軸線を含む平面内で、脚軸22の軸線に対して支
持リング32およびローラ34の軸線が傾くことをい
う。The inner peripheral surface 32c of the support ring 32 has an arc-shaped convex cross section. The inner peripheral surface 32c of the support ring 32 is externally fitted to the outer peripheral surface of the leg shaft 22 (for example, a straight shape parallel to the axis, and the cross section is an ellipse or a perfect circle). Not only is it possible to move in the axial direction of 22, but also to swing freely with respect to the leg shaft 22. Since the support ring 32 and the roller 34 are relatively rotatably assembled (unitized) via the needle roller 36 as described above, the support ring 32 and the roller 34 swing as a unit with respect to the leg shaft 22. In a movable relationship. Here, the swing means that the axes of the support ring 32 and the roller 34 are inclined with respect to the axis of the leg shaft 22 in a plane including the axis of the leg shaft 22.
【0023】トリポード部材20の脚軸22と外側継手
部材10のローラ案内面14とがローラ34を介して回
転方向に係合することにより、駆動側から従動側に回転
トルクが等速で伝達される。また、各ローラ34が脚軸
22に対して回転しながらローラ案内面14上を転動す
ることにより、外側継手部材10とトリポード部材20
との間の相対的な軸方向変位や角度変位が吸収されると
同時に、外側継手部材10とトリポード部材20とが作
動角を取りつつ回転トルクを伝達する際の、回転方向位
相の変化に伴う、各脚軸22のローラ案内面14に対す
る軸方向変位が吸収される。When the leg shaft 22 of the tripod member 20 and the roller guide surface 14 of the outer joint member 10 are rotationally engaged via the roller 34, rotational torque is transmitted from the driving side to the driven side at a constant speed. You. Further, each roller 34 rolls on the roller guide surface 14 while rotating with respect to the leg shaft 22, so that the outer joint member 10 and the tripod member 20 are rotated.
The relative axial displacement and angular displacement between the outer joint member 10 and the tripod member 20 at the same time as transmitting the rotational torque while taking the operating angle are caused by the change in the rotational direction phase. The axial displacement of each leg shaft 22 with respect to the roller guide surface 14 is absorbed.
【0024】一般的なトリポード型等速自在継手では、
外側継手部材10とトリポード部材20とが作動角をと
りつつ回転トルクを伝達する際、脚軸22の傾きに伴っ
て各ローラ34とローラ案内面14とが互いに斜交した
関係となるため、両者の間の滑りに起因する誘起スラス
トやスライド抵抗の発生が問題となる。これに対し、本
実施形態のように脚軸22に対するローラ34の首振り
揺動を可能とすることにより、ローラ34とローラ案内
面14の斜交状態を解消して、誘起スラストやスライド
抵抗の低減を図ることができる。In a general tripod type constant velocity universal joint,
When the outer joint member 10 and the tripod member 20 transmit rotational torque while taking an operating angle, the rollers 34 and the roller guide surface 14 are obliquely intersected with each other with the inclination of the leg shaft 22. A problem arises in that induced thrust and slide resistance caused by slippage during the sliding are generated. On the other hand, by enabling the swing of the roller 34 with respect to the leg shaft 22 as in the present embodiment, the oblique state between the roller 34 and the roller guide surface 14 is eliminated, and the induced thrust and slide resistance are reduced. Reduction can be achieved.
【0025】外側継手部材10は、例えば炭素含有量
0.15〜0.60wt%の炭素鋼材料(例えば、S5
3C)から、鍛造加工→機械加工→熱処理→軸部10a
(図2参照)の研削加工という主要工程を経て製造され
る。The outer joint member 10 is made of, for example, a carbon steel material having a carbon content of 0.15 to 0.60 wt% (for example, S5
From 3C), forging → machining → heat treatment → shaft 10a
It is manufactured through the main process of grinding (see FIG. 2).
【0026】上記熱処理工程には、ローラ案内面14を
硬化させる工程が含まれる。この工程では、図3に示す
ように、ローラ案内面14を焼入れ等の熱処理によって
HRc55以上まで硬化させ(硬化層42の形成領域を
散点模様で示す)、ローラ34の転動に耐え得る十分な
転動疲労寿命をローラ案内面14に付与する。ローラ案
内面14のうち、外側継手部材10の開口部近傍は熱処
理を施さず、硬化していない未硬化部44を形成する
(未硬化部44の軸方向の形成領域をSで表す)。この
未硬化部44の表面硬度は、後述する突出部46を形成
する際の割れ発生を防止するため、HRc40以下とす
る。ローラ案内面14のうち、未硬化部44を形成した
外側継手部材10の開口部近傍は、通常の使用状態では
ローラ34が転動することはないので、熱処理を省略し
ても特に問題は生じない。未硬化部44は未焼入れとし
て生材を残す他、表面硬度がHRc40を超えない範囲
で適当な熱処理を施して調質することもできる。The heat treatment step includes a step of hardening the roller guide surface 14. In this step, as shown in FIG. 3, the roller guide surface 14 is hardened to HRc 55 or more by heat treatment such as quenching (the formation region of the hardened layer 42 is indicated by a dotted pattern), and the roller guide surface 14 is sufficiently hard to withstand the rolling of the roller 34. A long rolling fatigue life is imparted to the roller guide surface 14. A portion of the roller guide surface 14 near the opening of the outer joint member 10 is not subjected to the heat treatment, and forms an uncured uncured portion 44 (an area where the uncured portion 44 is formed in the axial direction is represented by S). The surface hardness of the uncured portion 44 is set to HRc 40 or less in order to prevent the occurrence of cracks when forming the projecting portion 46 described later. Since the roller 34 does not roll in the roller guide surface 14 near the opening of the outer joint member 10 where the uncured portion 44 is formed in a normal use state, even if the heat treatment is omitted, no particular problem occurs. Absent. The uncured portion 44 may be left as unquenched to leave a raw material, or may be subjected to a suitable heat treatment within a range in which the surface hardness does not exceed HRc40, and may be refined.
【0027】このようにローラ案内面14の一部領域に
限って未硬化部44を形成するため、熱処理としては、
局部加熱が容易で硬化層以外には著しく熱影響を与えな
いように制御できる高周波焼入れが好ましい。Since the uncured portion 44 is formed only in a part of the roller guide surface 14 as described above, the heat treatment includes
Induction quenching, in which local heating is easy and which can be controlled so as not to significantly affect a portion other than the hardened layer, is preferable.
【0028】図3および図4に示すように、未硬化部4
4には、脚軸22の内径側に突出する突出部46が塑性
変形によって形成される。この突出部46は、例えばロ
ーラ案内面14の開口部近傍を治具で打撃して脚軸22
内径側に加締めることによって形成することができる。
このように開口部近傍のローラ案内面14に突出部46
を形成することにより、開口部近傍に達したローラ34
が突出部46と干渉し、それ以上の開口側への移動が規
制されるため、トリポード部材20の外側継手部材10
からの抜けを確実に防止することができる。トリポード
部材20の回転方向の位相を問わず、確実な抜け止め効
果を得るため、突出部46は、各トラック溝12に少な
くとも一つずつ形成するのが望ましい。As shown in FIGS. 3 and 4, the uncured portion 4
4 has a protrusion 46 protruding toward the inner diameter side of the leg shaft 22 by plastic deformation. The projecting portion 46 hits, for example, the vicinity of the opening of the roller guide surface 14 with a jig, and
It can be formed by caulking to the inner diameter side.
Thus, the protrusion 46 is provided on the roller guide surface 14 near the opening.
Forming the roller 34 that has reached the vicinity of the opening.
Interferes with the protruding portion 46, and further movement toward the opening side is restricted, so that the outer joint member 10 of the tripod member 20 is
Can be reliably prevented from coming off. Regardless of the phase of the tripod member 20 in the rotational direction, it is desirable to form at least one protrusion 46 in each track groove 12 in order to obtain a reliable retaining effect.
【0029】図1では、突出部46をローラ外周面14
の曲率中心付近に配置しているが、これを曲率中心より
も脚軸方向の何れかに変位させて形成すれば、突出部4
6が脚軸方向の両端でローラ34と干渉するようになる
ため、二軸間のプランジング量を増大させることができ
る。In FIG. 1, the projecting portion 46 is connected to the outer peripheral surface 14 of the roller.
Are arranged near the center of curvature of the projection, but if this is formed by displacing the center of curvature in any of the leg axis directions, the protrusion 4
Since the roller 6 interferes with the roller 34 at both ends in the leg axis direction, the plunging amount between the two axes can be increased.
【0030】突出部46は、図5に示すように脚軸22
の軸線方向に複数段(図示例は二段)配置することもで
き、この場合、各突出部46で分担する引抜け力が減少
するので、継手全体でより高い引抜き耐力が得られる。
また、突出部46の断面形状は、図4に示すような矩形
型に限らず、円形状[図6(A)]や三角形状(図6
(B)]でもよい。As shown in FIG. 5, the projection 46 is
A plurality of stages (two stages in the illustrated example) can be arranged in the axial direction, and in this case, the pull-out force shared by each protrusion 46 is reduced, so that a higher pull-out resistance can be obtained in the entire joint.
The cross-sectional shape of the protruding portion 46 is not limited to a rectangular shape as shown in FIG. 4, but may be a circular shape (FIG. 6A) or a triangular shape (FIG. 6).
(B)].
【0031】通常のトリポード型等速自在継手では、ロ
ーラ34とローラ案内面14との間の隙間、つまりロー
ラ直径と互いに向かい合うローラ案内面14間の距離と
の寸法差は約0.2mmである。従って、図4に示すよ
うに、突出部46の突出幅T(ローラ案内面14からの
突出幅)を0.5mm以上とすることで、トリポード部
材20の抜けを確実に防止することができる。In a normal tripod type constant velocity universal joint, a gap between the roller 34 and the roller guide surface 14, that is, a dimensional difference between a roller diameter and a distance between the roller guide surfaces 14 facing each other is about 0.2 mm. . Therefore, as shown in FIG. 4, by setting the protrusion width T of the protrusion 46 (the protrusion width from the roller guide surface 14) to 0.5 mm or more, the tripod member 20 can be reliably prevented from coming off.
【0032】上述したトリポード型等速自在継手をドラ
イブシャフトに使用する場合、トリポード部材20に図
示しないシャフトが取り付けられ、シャフトの他端にツ
ェッパー型等速自在継手(ボールフィクスドジョイン
ト)等の固定型等速自在継手が取り付けられる。ドライ
ブシャフトは、このように二種の等速自在継手およびシ
ャフトを組み立てたアセンブリの状態で自動車の車体に
組みつけられるが、この組み付けに際し、トリポード型
等速自在継手の外側継手部材10を上にすると、トリポ
ード部材20に、その自重と、シャフトおよび固定型等
速自在継手の重量とが作用する。このときのトリポード
部材20を外側継手部材10から引抜こうとする力は最
大で490Nとなるので、突出部46には少なくとも4
90N以上の引抜き耐力が必要となる。When the above-mentioned tripod type constant velocity universal joint is used for a drive shaft, a shaft (not shown) is attached to the tripod member 20, and a fixed type such as a zepper type constant velocity universal joint (ball fixed joint) is attached to the other end of the shaft. A constant velocity universal joint is attached. The drive shaft is assembled to the body of the automobile in an assembled state in which the two kinds of constant velocity universal joints and the shaft are assembled. In this assembly, the outer joint member 10 of the tripod type constant velocity universal joint is placed upward. Then, the tripod member 20 acts on its own weight and the weight of the shaft and the fixed type constant velocity universal joint. At this time, the force for pulling out the tripod member 20 from the outer joint member 10 is 490 N at the maximum.
A pull-out strength of 90 N or more is required.
【0033】引抜き耐力は、上述のように各トラック溝
12に設ける突出部46の数を変更することによって調
整することができる。その他、突出部46の軸方向長さ
Uを変更することによっても調整でき、例えば図1に示
すように、向かい合うローラ案内面14に一つずつ突出
部46を設ける場合、突出部46の軸方向長さUを1m
m以上とすれば、490N以上の引抜き耐力が得られる
ことが判明した。The pull-out strength can be adjusted by changing the number of protrusions 46 provided in each track groove 12 as described above. In addition, it can be adjusted by changing the axial length U of the projecting portion 46. For example, as shown in FIG. 1, when the projecting portions 46 are provided one by one on the opposing roller guide surfaces 14, the axial direction of the projecting portion 46 can be adjusted. Length U is 1m
It was found that a pull-out strength of 490 N or more can be obtained when the distance is at least m.
【0034】以上、図1および図2に例示するトリポー
ド型等速自在継手に本発明を適用した場合を説明した
が、本発明はこれに限らず、種々の形式のトリポード型
等速自在継手に適用することができる。The case where the present invention is applied to the tripod type constant velocity universal joint exemplified in FIGS. 1 and 2 has been described above. However, the present invention is not limited to this, and various types of tripod type constant velocity universal joints can be applied. Can be applied.
【0035】例えば、脚軸22に対するローラ34の首
振り揺動を自在とした機構としては、以下のものが知ら
れているが、本発明は下記〜の何れの機構にも適用
し得るものである。For example, the following mechanism is known as a mechanism which allows the roller 34 to swing freely with respect to the leg shaft 22. The present invention can be applied to any of the following mechanisms. is there.
【0036】 外側ローラ(本実施形態のローラ34
に相当する)の外周面を凸球状(曲率中心が脚軸の軸線
上にある「真球面」、曲率中心が脚軸22の軸線から外
径側にオフセットされている、いわゆる「トーラス面」
の双方を含む)、内周面を円筒状、内側ローラ(本実施
形態の支持リング32に相当する)の外周面を凸球状と
し、外側ローラの円筒状の内周面と内側ローラの凸球状
の外周面との間の滑りによって、外側ローラの首振り揺
動を自在としたもの(特公平3−1529号等)。Outer roller (the roller 34 of the present embodiment)
), The so-called “torus surface” in which the outer peripheral surface of a convex spherical surface (corresponding to “.
), The inner peripheral surface is cylindrical, the outer peripheral surface of the inner roller (corresponding to the support ring 32 of the present embodiment) is a convex spherical surface, the cylindrical inner peripheral surface of the outer roller and the convex spherical surface of the inner roller. (See Japanese Patent Publication No. 3-1529, etc.) that allows the outer roller to swing freely by sliding between itself and the outer peripheral surface.
【0037】 外側ローラの外周面を凸球状(真球
面、トーラス面の双方を含む)、内周面を内側ローラと
線接触する形状、内側ローラの外周面を凸球状とし、外
側ローラの内周面と内側ローラの凸球状の外周面との間
の滑りによって、外側ローラの首振り揺動を自在とし、
かつ、誘起スラストやスライド抵抗を一層低減するた
め、外側ローラの内周面を内側ローラの外周面との接触
位置で脚軸先端側に向いた負荷分力を発生させる形状と
したもの(特開平9−14280号等)。The outer peripheral surface of the outer roller has a convex spherical shape (including both a true spherical surface and a torus surface), the inner peripheral surface has a shape in linear contact with the inner roller, and the outer peripheral surface of the inner roller has a convex spherical shape. By sliding between the surface and the convex spherical outer surface of the inner roller, the outer roller can swing freely and swing,
Further, in order to further reduce induced thrust and slide resistance, the inner peripheral surface of the outer roller is shaped to generate a load component directed toward the tip end of the leg shaft at the position of contact with the outer peripheral surface of the inner roller (Japanese Patent Laid-Open Publication No. No. 9-14280).
【0038】 ローラ案内面を平坦面、外側ローラの
外周面を円筒状、内周面を凹球状、内側ローラの外周面
を凸球状とし、外側ローラの凹球状内周面と内側ローラ
の凸球状外周面との間の滑りによって、外側ローラの首
振り揺動を自在としたもの(特願平8−4073号、特
願平8−138335号等)。The roller guide surface is flat, the outer surface of the outer roller is cylindrical, the inner surface is concave, the outer surface of the inner roller is convex, and the inner surface of the outer roller is convex and the inner surface is concave. One in which the outer roller can swing freely by sliding between the outer peripheral surface (Japanese Patent Application No. 8-4073, Japanese Patent Application No. 8-138335).
【0039】 上記の構成に加え、ローラ案内面と
脚軸の軸線とを作動角が0°の状態で互いに非平行とし
たもの(特開平11−13779号)。In addition to the above configuration, the roller guide surface and the axis of the leg shaft are not parallel to each other with an operating angle of 0 ° (JP-A-11-13779).
【0040】 脚軸の外周面を凸球状に形成すると共
に、ローラを複数のニードルローラを介して支持リング
に組み付けてローラアッセンブリを構成し、支持リング
の円筒状の内周面を脚軸の凸球状の外周面に外嵌したも
の(特公平7−117108号、特許2623216号
等)。The outer peripheral surface of the leg shaft is formed in a convex spherical shape, and the roller is assembled to the support ring via a plurality of needle rollers to form a roller assembly, and the cylindrical inner peripheral surface of the support ring is formed in a convex shape of the leg shaft. Those which are externally fitted to a spherical outer peripheral surface (Japanese Patent Publication No. 7-117108, Japanese Patent No. 2623216, etc.).
【0041】 ローラ案内面に案内されるローラと、
脚軸の外周面に外嵌されてローラを回転自在に支持する
支持リングとを有し、支持リングの内周面は円弧状凸断
面であり、脚軸の外周面は縦断面においてはストレート
形状で、横断面においては継手の軸線と直交する方向で
支持リングの内周面と接触し、かつ継手の軸線方向で支
持リングの内周面との間にすきまを形成するようになっ
ているもの(特願平11−59040号)。A roller guided on a roller guide surface,
A support ring that is fitted over the outer peripheral surface of the leg shaft and rotatably supports the roller, the inner peripheral surface of the support ring has an arc-shaped convex cross section, and the outer peripheral surface of the leg shaft has a straight shape in a vertical cross section. In the cross-section, it comes into contact with the inner peripheral surface of the support ring in a direction perpendicular to the axis of the joint, and forms a clearance between the inner peripheral surface of the support ring in the axial direction of the joint. (Japanese Patent Application No. 11-59040).
【0042】なお、上述した首振り揺動型に限らず、ロ
ーラが首振り揺動しないタイプのトリポード型等速自在
継手にも同様に本発明を適用することができる。The present invention is not limited to the above-described swinging type, but can be similarly applied to a tripod type constant velocity universal joint in which rollers do not swing.
【0043】[0043]
【発明の効果】以上のように、本発明によれば、ローラ
が転動するローラ案内面において高い表面硬度が得られ
るため、転動疲労寿命等の増大を通じて継手寿命の向上
が図られる。また、ローラ案内面のうちで、外側継手部
材の開口部近傍に突出部を設け、この突出部に開口部近
傍まで移動したローラを干渉させるので、トリポード部
材の抜けを確実に防止することができ、しかも突出部を
塑性変形によって形成するので、簡易かつ低コストに高
い抜け止め効果が得られる。突出部は、ローラ案内面の
うちの未硬化部に形成されるため、塑性変形に際して割
れ等を生じることはなく、加工性も良好である。As described above, according to the present invention, a high surface hardness is obtained on the roller guide surface on which the roller rolls, so that the life of the joint can be improved by increasing the rolling fatigue life and the like. Further, of the roller guide surface, a protruding portion is provided near the opening of the outer joint member, and the protruding portion interferes with the roller moved to the vicinity of the opening, so that the tripod member can be reliably prevented from coming off. Moreover, since the protruding portion is formed by plastic deformation, a high retaining effect can be obtained simply and at low cost. Since the protruding portion is formed in the uncured portion of the roller guide surface, it does not crack or the like during plastic deformation and has good workability.
【図1】本発明にかかるトリポード型等速自在継手の端
面図(正面図)である。FIG. 1 is an end view (front view) of a tripod type constant velocity universal joint according to the present invention.
【図2】図1に示すトリポード型等速自在継手の縦断面
図である。FIG. 2 is a longitudinal sectional view of the tripod type constant velocity universal joint shown in FIG.
【図3】図2の要部を拡大した縦断面図である。FIG. 3 is an enlarged longitudinal sectional view of a main part of FIG. 2;
【図4】外側継手部材の正面図である。FIG. 4 is a front view of the outer joint member.
【図5】突出部の他の実施形態を示す正面図である。FIG. 5 is a front view showing another embodiment of the protrusion.
【図6】突出部の他の実施形態を示す正面図である。FIG. 6 is a front view showing another embodiment of the protruding portion.
【図7】従来のトリポード型等速自在継手の端面図(正
面図)である。FIG. 7 is an end view (front view) of a conventional tripod type constant velocity universal joint.
【図8】従来の抜け止め構造例を示す端面図(正面図)
である。FIG. 8 is an end view (front view) showing an example of a conventional retaining structure.
It is.
【図9】従来の抜け止め構造例を示す端面図(正面図)
である。FIG. 9 is an end view showing an example of a conventional retaining structure (front view).
It is.
【図10】従来の抜け止め構造例を示す端面図(正面
図)である。FIG. 10 is an end view (front view) showing a conventional retaining structure example.
10 外側継手部材 12 トラック溝 14 ローラ案内面 20 トリポード部材 22 脚軸 32 支持リング 34 ローラ 36 針状ころ 44 未硬化部 46 突出部 DESCRIPTION OF SYMBOLS 10 Outer joint member 12 Track groove 14 Roller guide surface 20 Tripod member 22 Leg axis 32 Support ring 34 Roller 36 Needle roller 44 Uncured part 46 Projecting part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 板垣 卓 静岡県磐田市東貝塚1578番地 エヌティエ ヌ株式会社内 (72)発明者 藏 久昭 静岡県磐田市東貝塚1578番地 エヌティエ ヌ株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taku Itagaki 1578 Higashikaizuka, Iwata City, Shizuoka Prefecture (72) Inventor Hisaaki Kura 1578 Higashikaizuka, Iwata City, Shizuoka Prefecture
Claims (6)
し、各トラック溝の向かい合った側壁にローラ案内面を
形成した外側継手部材と、半径方向に突出した三本の脚
軸を有するトリポード部材と、各脚軸の外周に回転自在
に取り付けられ、外側継手部材のトラック溝内に収容さ
れたローラとを備え、ローラをローラ案内面によって案
内するトリポード型等速自在継手において、 ローラ案内面を、外側継手部材の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したこと
を特徴とするトリポード型等速自在継手。1. An outer joint member having three axial track grooves on an inner periphery thereof and a roller guide surface formed on a side wall facing each track groove, and three radially protruding leg shafts. A tripod-type constant velocity universal joint, comprising: a tripod member having an outer joint member rotatably mounted on an outer periphery of each leg shaft; and a roller housed in a track groove of the outer joint member, wherein the roller is guided by a roller guide surface. A tripod-type constant velocity wherein the guide surface is hardened by heat treatment while leaving the vicinity of the opening of the outer joint member, and a protruding portion capable of interfering with the roller is formed by plastic deformation in an unhardened portion near the opening. Universal joint.
つずつ形成した請求項1記載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 at least one projecting portion is formed in each track groove.
った請求項1または2記載のトリポード型等速自在継
手。3. The tripod type constant velocity universal joint according to claim 1, wherein the roller guide surface is hardened by induction hardening.
した請求項1〜3何れか記載のトリポード型等速自在継
手。4. The tripod-type constant velocity universal joint according to claim 1, wherein the surface hardness of the uncured portion is HRc 40 or less.
請求項1〜4何れか記載のトリポード型等速自在継手。5. The tripod-type constant velocity universal joint according to claim 1, wherein the protrusion width of the protrusion is 0.5 mm or more.
する請求項1〜5何れか記載のトリポード型等速自在継
手。6. The tripod-type constant velocity universal joint according to claim 1, wherein the protrusion has a pull-out strength of 490 N or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001032497A JP2002235766A (en) | 2001-02-08 | 2001-02-08 | Tripod type constant velocity universal joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001032497A JP2002235766A (en) | 2001-02-08 | 2001-02-08 | Tripod type constant velocity universal joint |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002235766A true JP2002235766A (en) | 2002-08-23 |
Family
ID=18896420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001032497A Pending JP2002235766A (en) | 2001-02-08 | 2001-02-08 | Tripod type constant velocity universal joint |
Country Status (1)
Country | Link |
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JP (1) | JP2002235766A (en) |
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JP2007107695A (en) * | 2005-10-17 | 2007-04-26 | Ntn Corp | Outer member of tripod-type constant velocity universal joint |
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KR100633304B1 (en) | 2005-01-17 | 2006-10-12 | 자동차부품연구원 | Tripod-constant velocity joint of double roller type |
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JP2007107695A (en) * | 2005-10-17 | 2007-04-26 | Ntn Corp | Outer member of tripod-type constant velocity universal joint |
WO2008102494A1 (en) * | 2007-02-23 | 2008-08-28 | Honda Motor Co., Ltd. | Tripod constant-velocity joint |
WO2008117614A1 (en) * | 2007-03-26 | 2008-10-02 | Ntn Corporation | Tripod constant velocity universal joint |
JP2008304039A (en) * | 2007-06-11 | 2008-12-18 | Ntn Corp | Tripod type constant velocity universal joint |
WO2008152923A1 (en) * | 2007-06-11 | 2008-12-18 | Ntn Corporation | Tripod type even speed universal joint |
WO2009041211A1 (en) * | 2007-09-28 | 2009-04-02 | Ntn Corporation | Sliding-type constant velocity universal joint |
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JP2009097709A (en) * | 2007-09-28 | 2009-05-07 | Ntn Corp | Sliding-type constant velocity universal joint |
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JP2009127748A (en) * | 2007-11-22 | 2009-06-11 | Ntn Corp | Tripod type constant velocity universal joint |
WO2011078103A1 (en) * | 2009-12-22 | 2011-06-30 | Ntn株式会社 | Tripod constant-velocity universal joint |
JP2013079681A (en) * | 2011-10-04 | 2013-05-02 | Ntn Corp | Tripod type constant velocity universal joint |
WO2020166506A1 (en) * | 2019-02-13 | 2020-08-20 | Ntn株式会社 | Outer connection member for sliding-type constant velocity universal joint, and sliding-type constant velocity universal joint |
JP2020133660A (en) * | 2019-02-13 | 2020-08-31 | Ntn株式会社 | Outer joint member for slide-type constant velocity universal joint, and slide-type constant velocity universal joint |
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