JPH0619862Y2 - Constant velocity universal joint - Google Patents
Constant velocity universal jointInfo
- Publication number
- JPH0619862Y2 JPH0619862Y2 JP1987040384U JP4038487U JPH0619862Y2 JP H0619862 Y2 JPH0619862 Y2 JP H0619862Y2 JP 1987040384 U JP1987040384 U JP 1987040384U JP 4038487 U JP4038487 U JP 4038487U JP H0619862 Y2 JPH0619862 Y2 JP H0619862Y2
- Authority
- JP
- Japan
- Prior art keywords
- universal joint
- spherical surface
- constant velocity
- velocity universal
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
-
- 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
- F16D2003/2023—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 with linear rolling bearings between raceway and trunnion mounted shoes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Description
この考案は、主として前輪駆動式の自動車に適用される
等速自在継手に関し、特にトリポード形等速自在継手に
関するものである。The present invention relates to a constant velocity universal joint mainly applied to a front wheel drive type automobile, and more particularly to a tripod type constant velocity universal joint.
トリポード形等速自在継手において、その入出力軸があ
る作動角をとって回転力を伝達する場合、トリポード部
材の各脚軸（トラニオン軸）に回転自在に嵌合した球面
ローラが、外輪の円筒状トラック溝に対して傾斜した状
態でプランジングするため、軸方向のスラスト力が発生
し、振動の原因となることは従来から知られている。 このような問題を解決する一つの手段として、第７図に
示すように、トリポード部材１の脚軸２を球面に形成す
ると共に、脚軸２のまわりに旋回揺動自在に軸受組立体
３を嵌合し、外輪４のトラック溝５に形成した外輪軸方
向の転走面６に上記軸受組立体３の針状ころ７を転動自
在に収容したトリポード形等速自在継手がある。（特開
昭５８−６２６号公報参照）。In a tripod type constant velocity universal joint, when the input / output shaft takes a certain working angle to transmit a rotational force, the spherical roller rotatably fitted to each leg shaft (trunnion shaft) of the tripod member is a cylindrical outer ring. It is conventionally known that thrust is generated in the axial direction and causes vibration because the plunging is performed in a state of being inclined with respect to the track groove. As one means for solving such a problem, as shown in FIG. 7, the leg shaft 2 of the tripod member 1 is formed into a spherical surface, and the bearing assembly 3 is swingably swingable around the leg shaft 2. There is a tripod type constant velocity universal joint in which the needle roller 7 of the bearing assembly 3 is rotatably accommodated in the rolling surface 6 in the axial direction of the outer ring which is fitted and formed in the track groove 5 of the outer ring 4. (See JP-A-58-626).
上記の等速自在継手は、脚軸２と軸受組立体３とが旋回
揺動自在に嵌合しているため、入出力軸が作動角をもっ
て回転した場合でも、軸受組立体３が針状ころ７を介し
て転走面６に沿って外輪軸方向に移動するため、スラス
ト力の発生を防止できる効果がある。 しかし、高トルク及び高回転等の厳しい条件において
は、上記脚軸２と軸受組立体３との球面接触構造はしば
しば油膜切れを起こし、早期焼付きを発生させるという
問題点を残していた。In the above-described constant velocity universal joint, the leg shaft 2 and the bearing assembly 3 are pivotally and swingably fitted to each other, so that even if the input / output shaft rotates with an operating angle, the bearing assembly 3 is needle roller. Since it moves in the axial direction of the outer ring along the rolling surface 6 via 7, it is possible to prevent the thrust force from being generated. However, under severe conditions such as high torque and high rotation, the spherical contact structure between the leg shaft 2 and the bearing assembly 3 often causes the oil film to run out, resulting in early seizure.
上記の問題点を解決するために、この考案は軸受組立体
のボタン材凹球面の曲率半径を脚軸凸球面の曲率半径の
1.03〜1.06倍に形成し、グリースの取り込み性を改善し
たものである。また、上記軸部の外周凸球面に、下層が
リン酸塩、上層の表面層がＭＯＳ２からなる皮膜を形成
することにより、耐久性を改善したものである。In order to solve the above problems, the present invention sets the radius of curvature of the concave spherical surface of the button material of the bearing assembly to the radius of curvature of the convex spherical surface of the axle.
Formed 1.03 to 1.06 times to improve grease uptake. In addition, durability is improved by forming a film in which the lower layer is phosphate and the upper surface layer is MOS 2 on the outer peripheral convex spherical surface of the shaft portion.
第１図及び第２図に示す本考案の実施例の等速自在継手
は、外輪１１の内側にトリポード部材１２をスライド自
在に挿入したものであって、外輪１１の閉鎖端に第１軸
（図示せず）が一体に設けられ、また内周面に軸方向の
３本のトラック溝１４が中心軸のまわりに120度の間隔
をおいて形成されている。 各トラック溝１４の転走面１５はトラック溝１４から一
段凹入して形成されている。 トリポード部材１２は、第２軸（図示せず）に連結され
る。トリポード部材１２は各トラック溝１４に対向して
放射状に突設された３本の脚軸１９を有する。この脚軸
１９は外周凸球面２０に形成され、ボタン材２１の内周
凹球面２２に旋回揺動自在に嵌合されている。 このボタン材２１は、一側に上記凹球面２２、他側に転
走面１５と平行な平面状表面２３を有する。更にこのボ
タン材２１はおおむね円筒形の胴部２４を有する。 ボタン材２１の平面状表面２３と転走面１５との間に
は、保持器２７により転動自在に案内保持された針状こ
ろ２５が直線状に配列されている。 軸受組立体２６は上記のボタン材２１、保持器２７及び
針状ころ２５の組合せからなる。これらの潤滑は外輪１
１内に充填されたグリースによって行う。 上記ボタン材２１の凹球面２２と脚軸１９の凸球面２０
とは球面接触、即ち凹球面２２の底部と点接触をし、両
部材の曲率半径の差に相当する間隙が生じる。この間隙
により、潤滑油膜が形成され、両部材の曲率半径が焼付
きの有無を決定することが試験により明らかになった。
第３図は、その試験結果を示すもので、ボタン材２１の
凹球面２２の曲率半径（Ｒ）に対し、脚軸１９の凸球面
２０の曲率半径（ｒ）を夫々変更し、焼付きの有無を確
認した。ここで、負荷トルク（Ｔ）は140kg-m、回転数
（Ｎ）は100rpm、作動角（θ）は７°と、この種の等速
自在継手にとって過酷な条件で行った。 この試験結果から判るように、従来の曲率比Ｒ／ｒ＝1.
01.のものも含め、Ｒ／ｒ＝1.00〜1.02の曲率比のもの
は全て１〜５hrsで焼付いたのに対し、Ｒ／ｒ＝1.03の
ものは10hrsの試験においても異常を示さず、良好な潤
滑を維持することが判った。なお、曲率比が大きくなれ
ば逆に接触面積が減少し、接触面圧の点で不利になるこ
とが計算によって確認されている。従って潤滑油膜の形
成しやすさ及び面圧の両面から考え曲率比Ｒ／ｒ＝1.03
〜1.06に設定することが好適である。更に本考案者は、
試験条件をＴ＝70kg-m、Ｎ＝500rpmに変更し、両部材の
なじみ性の良否を確認した。第４図にその結果を示す。
第４図において、（Ａ）は脚軸１９の凸球面２０の表面
にリン酸塩皮膜処理後、ＭＯＳ２をコーティングしたも
の、（Ｂ）はボタン材２１の凹球面２２に同上の表面処
理を施したものを示す。この試験により、少なくとも脚
軸１９の凸球面２０にこの種の表面処理を施せば効果が
あることも判った。 上記のリン酸塩の層は、上層のＭＯＳ２層のコーティン
グが良好に行えるようにするために形成される。 第５図及び第６図は曲率比Ｒ／ｒ＝1.03〜1.06に設定し
たボタン材２６の他の実施例を示す。 第５図はボタン材２６の凹球面２７′に複数の凹み２８
を形成したもの、第６図はボタン材２９の凹球面３０に
同心状の環状溝３１を形成したもので、確実にグリース
溜りを形成し、焼付きを防止することが試験により確認
できた。The constant velocity universal joint according to the embodiment of the present invention shown in FIGS. 1 and 2 has a tripod member 12 slidably inserted inside an outer ring 11, and a first shaft ( (Not shown) are integrally provided, and three track grooves 14 in the axial direction are formed on the inner peripheral surface at intervals of 120 degrees around the central axis. The rolling surface 15 of each track groove 14 is formed by recessing one step from the track groove 14. The tripod member 12 is connected to a second shaft (not shown). The tripod member 12 has three leg shafts 19 that are radially provided so as to face each track groove 14. The leg shaft 19 is formed on an outer peripheral convex spherical surface 20 and is fitted to an inner peripheral concave spherical surface 22 of a button member 21 so as to be swingable and swingable. The button member 21 has a concave spherical surface 22 on one side and a planar surface 23 parallel to the rolling surface 15 on the other side. Further, the button member 21 has a body portion 24 having a substantially cylindrical shape. Between the flat surface 23 of the button material 21 and the rolling surface 15, needle rollers 25 which are guided and held by a cage 27 so as to be rollable are linearly arranged. The bearing assembly 26 is a combination of the button member 21, the cage 27 and the needle rollers 25 described above. These lubrication is the outer ring 1
It is performed by the grease filled in 1. The concave spherical surface 22 of the button member 21 and the convex spherical surface 20 of the leg shaft 19
And are in spherical contact, that is, in point contact with the bottom of the concave spherical surface 22, and a gap corresponding to the difference in radius of curvature between both members is generated. Tests have revealed that this gap forms a lubricating oil film, and the radii of curvature of both members determine the presence or absence of seizure.
FIG. 3 shows the test results, in which the radius of curvature (r) of the convex spherical surface 20 of the leg shaft 19 is changed with respect to the radius of curvature (R) of the concave spherical surface 22 of the button material 21 to prevent seizure. The existence was confirmed. Here, the load torque (T) was 140 kg-m, the rotation speed (N) was 100 rpm, and the working angle (θ) was 7 °, which was performed under severe conditions for this kind of constant velocity universal joint. As can be seen from this test result, the conventional curvature ratio R / r = 1.
Including those of 01., those with a curvature ratio of R / r = 1.00 to 1.02 were all seized at 1 to 5 hrs, while those of R / r = 1.03 did not show any abnormalities even in the 10 hrs test and are good. It was found to maintain good lubrication. It has been confirmed by calculation that the contact area decreases conversely as the curvature ratio increases, which is disadvantageous in terms of contact surface pressure. Therefore, considering both the ease of forming the lubricating oil film and the surface pressure, the curvature ratio R / r = 1.03
It is preferable to set it to ˜1.06. Furthermore, the inventor
The test conditions were changed to T = 70 kg-m and N = 500 rpm, and the conformability of both members was confirmed. The results are shown in FIG.
In FIG. 4, (A) shows that the surface of the convex spherical surface 20 of the leg shaft 19 is subjected to phosphate coating and then is coated with MOS 2 , and (B) shows that the concave spherical surface 22 of the button material 21 is subjected to the same surface treatment. It shows what was given. From this test, it was also found that it would be effective if at least the convex spherical surface 20 of the leg shaft 19 is subjected to this kind of surface treatment. The phosphate layer described above is formed to allow good coating of the overlying MOS 2 layer. 5 and 6 show another embodiment of the button member 26 in which the curvature ratio R / r = 1.03 to 1.06 is set. FIG. 5 shows a plurality of depressions 28 on the concave spherical surface 27 'of the button material 26.
It has been confirmed by a test that a grease reservoir is surely formed and seizure is prevented, in which the concentric annular groove 31 is formed on the concave spherical surface 30 of the button member 29.
以上のように、この考案は軸受組立体のボタン材凹球面
の曲率半径を、脚軸凸球面の曲率半径の1.03〜1.06倍に
形成したことにより、潤滑グリースの取り込み性を改善
し、高負荷条件においても焼付きの発生と早期剥離を防
止したので、この種の等速自在継手の耐久性を著しく向
上させることができる。 また、脚軸の外周凸球面に、下層がリン酸塩、上層の表
面層がＭＯＳ２からなる皮膜を形成したことにより、一
層耐久性を向上させる効果がある。As described above, according to the present invention, the radius of curvature of the concave spherical surface of the button member of the bearing assembly is formed to be 1.03 to 1.06 times the radius of curvature of the convex spherical surface of the axle, thereby improving the uptake of lubricating grease and increasing the load. Since seizure and premature peeling were prevented even under the conditions, the durability of this kind of constant velocity universal joint can be remarkably improved. Further, by forming a film in which the lower layer is a phosphate and the upper surface layer is MOS 2 on the outer peripheral convex spherical surface of the pedestal, there is an effect of further improving durability.
第１図は本考案の実施例を示す部分断面図、第２図は、
第１図のＸ−Ｘ断面図を示す。第３図は、焼付き試験の
結果を示し、第４図は、なじみ性の試験の結果を示す。
第５図及び第６図は本考案の他の実施例を示す部分断面
図、第７図は従来の等速自在継手を示す斜視図である。 １１……外輪 １２……トリポード部材 １４……トラック溝 １５……転走面 １９……脚軸 ２０……凸球面 ２１、２６、２９……ボタン材 ２７′、３０……凹球面FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG.
1. The XX sectional drawing of FIG. 1 is shown. FIG. 3 shows the result of the seizure test, and FIG. 4 shows the result of the conformability test.
5 and 6 are partial sectional views showing another embodiment of the present invention, and FIG. 7 is a perspective view showing a conventional constant velocity universal joint. 11 ... Outer ring 12 ... Tripod member 14 ... Track groove 15 ... Rolling surface 19 ... Leg shaft 20 ... Convex spherical surface 21, 26, 29 ... Button material 27 ', 30 ... Concave spherical surface
Claims (1)
形成し、外輪の内側にトリポード部材を挿入し、該トリ
ポード部材の３本の外周凸球面に形成した脚軸を軸受組
立体のボタン材に対して揺動旋回自在に球面接触させ、
その軸受組立体をトラック溝の外輪軸方向の転走面に挿
入した等速自在継手において、上記ボタン材凹球面の曲
率半径を、脚軸凸球面の曲率半径の1.03〜1.06倍に形成
し、上記脚軸の外周凸球面に、下層がリン酸塩、上層の
表面層がＭＯＳ２からなる皮膜を形成したことを特徴と
する等速自在継手。1. A bearing assembly in which three track grooves in the axial direction are formed on an inner surface of an outer ring, a tripod member is inserted inside the outer ring, and a leg shaft formed on three outer peripheral convex spherical surfaces of the tripod member is formed. Make a spherical contact with the button material of
In a constant velocity universal joint in which the bearing assembly is inserted in the rolling surface of the track groove in the axial direction of the outer ring, the radius of curvature of the concave spherical surface of the button material is formed to be 1.03 to 1.06 times the radius of curvature of the convex spherical surface of the axle. A constant velocity universal joint characterized in that a coating having a lower layer of phosphate and an upper surface layer of MOS 2 is formed on the outer peripheral convex spherical surface of the axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987040384U JPH0619862Y2 (en) | 1987-03-19 | 1987-03-19 | Constant velocity universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987040384U JPH0619862Y2 (en) | 1987-03-19 | 1987-03-19 | Constant velocity universal joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63147934U JPS63147934U (en) | 1988-09-29 |
| JPH0619862Y2 true JPH0619862Y2 (en) | 1994-05-25 |
Family
ID=30854433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987040384U Expired - Lifetime JPH0619862Y2 (en) | 1987-03-19 | 1987-03-19 | Constant velocity universal joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619862Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5354645A (en) * | 1976-10-27 | 1978-05-18 | Ntn Toyo Bearing Co Ltd | Uniform velocity universal joint |
| FR2506872B1 (en) * | 1981-06-01 | 1986-05-09 | Glaenzer Spicer Sa | TELESCOPIC HOMOCINETIC JOINT |
-
1987
- 1987-03-19 JP JP1987040384U patent/JPH0619862Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63147934U (en) | 1988-09-29 |
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