JPS646413Y2 - - Google Patents
Info
- Publication number
- JPS646413Y2 JPS646413Y2 JP1984056739U JP5673984U JPS646413Y2 JP S646413 Y2 JPS646413 Y2 JP S646413Y2 JP 1984056739 U JP1984056739 U JP 1984056739U JP 5673984 U JP5673984 U JP 5673984U JP S646413 Y2 JPS646413 Y2 JP S646413Y2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- groove
- joint member
- curvature
- radius
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Rolling Contact Bearings (AREA)
- Bearings For Parts Moving Linearly (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、自動車の駆動力伝達軸等に利用さ
れる等速自在継手に関するものである。[Detailed Description of the Invention] Industrial Application Field This invention relates to a constant velocity universal joint used in a driving force transmission shaft of an automobile, etc.
従来の技術
従来、自動車の駆動力伝達軸等に利用される等
速自在継手として、例えば第6図の構造のものが
知られている。この等速自在継手は、外側継手部
材1と内側継手部材2との間に複数個のボール3
が、ケージ4を介して外側継手部材1の内周面及
び内側継手部材2の外周面に対向して等配形成さ
せた軸方向に延びる円弧状のボール溝5,6に係
合された状態で保持されている。そして外側継手
部材1の内周面、内側継手部材2の外周面及びケ
ージ4の内外周面を、継手の中心Oに曲率中心を
持つ同心球面に形成し、かつ外側継手部材1のボ
ール溝5及び内側継手部材2のボール溝6の溝底
を継手の中心Oの右左に等距離だけずらされた点
A,A′に曲率中心を持つ円弧状に形成し、これ
によりボール3を常に外内両継手部材1,2の軸
線の2等分面上に配向せしめて等速性を確保する
ようにしたものである。BACKGROUND ART Conventionally, as a constant velocity universal joint used for a driving force transmission shaft of an automobile, for example, one having the structure shown in FIG. 6 is known. This constant velocity universal joint has a plurality of balls 3 between an outer joint member 1 and an inner joint member 2.
is engaged with arc-shaped ball grooves 5 and 6 extending in the axial direction, which are formed at equal intervals on the inner circumferential surface of the outer joint member 1 and the outer circumferential surface of the inner joint member 2 via the cage 4. is held in The inner peripheral surface of the outer joint member 1, the outer peripheral surface of the inner joint member 2, and the inner and outer peripheral surfaces of the cage 4 are formed into concentric spherical surfaces having a center of curvature at the center O of the joint, and the ball groove 5 of the outer joint member 1 The groove bottom of the ball groove 6 of the inner joint member 2 is formed into an arc shape with the center of curvature at points A and A' shifted by an equal distance to the right and left of the center O of the joint. The joint members 1 and 2 are oriented on a bisecting plane of the axes of the joint members 1 and 2 to ensure constant velocity.
考案が解決しようとする問題点
ところで、この種の等速自在継手では外側継手
部材1のボール溝5の溝深さが奥底部側に向かつ
て次第に浅くなつている為、第7図に示すように
外内両継手部材1,2が大きな作動角θをとつた
場合、ボール3とボール溝5との間でトルク伝達
の面で不都合が生じ、大きな作動角θをとること
ができない。即ち、この種の等速自在継手に於い
て外側継手部材1のボール溝5は、第8図に示す
ようにボール3に対して接触角αを持つて接触す
る2つの軌道面5a,5aからなり、この軌道面
5aは曲率半径Rがボール3の軸方向に延びる転
動領域において一定となるように形成されてい
る。従つて、外側継手部材1の奥底部側において
ボール溝5の溝深さが第9図に示すように浅くな
ると、ボール溝5の肩部5bからボール3とボー
ル溝5の接触点Cまでの距離kが小さくなり、負
荷の大きい場合には外側継手部材1のボール溝5
とボール3との間に生じる接触楕円Mの長軸側半
径aが、外側継手部材1のボール溝5からはみだ
して、接触楕円Mによる応力集中でボール溝5の
肩部5bが損傷すると云う不都合が生じ、また、
負荷トルクの伝達能力に制限を受けるという問題
がある。Problems to be Solved by the Invention By the way, in this type of constant velocity universal joint, the groove depth of the ball groove 5 of the outer joint member 1 gradually becomes shallower toward the inner bottom side. If both the outer and inner joint members 1 and 2 take a large operating angle θ, a problem occurs in terms of torque transmission between the ball 3 and the ball groove 5, and a large operating angle θ cannot be achieved. That is, in this type of constant velocity universal joint, the ball groove 5 of the outer joint member 1 is formed from two raceway surfaces 5a, 5a that contact the ball 3 at a contact angle α, as shown in FIG. The raceway surface 5a is formed so that the radius of curvature R is constant in the rolling region extending in the axial direction of the ball 3. Therefore, when the groove depth of the ball groove 5 becomes shallower as shown in FIG. When the distance k becomes small and the load is large, the ball groove 5 of the outer joint member 1
The major axis side radius a of the contact ellipse M generated between the contact ellipse M and the ball 3 protrudes from the ball groove 5 of the outer joint member 1, and the stress concentration caused by the contact ellipse M damages the shoulder portion 5b of the ball groove 5. occurs, and
There is a problem in that the ability to transmit load torque is limited.
この考案は、大きな作動角を得られると共に、
大きな作動角をとるときでも充分な負荷トルクの
伝達能力を得ることができ、ボール溝の肩部の破
損のおそれのない等速自在継手を提供せんとする
ものである。 This idea can obtain a large working angle, and
It is an object of the present invention to provide a constant velocity universal joint that can obtain sufficient load torque transmission ability even when operating at a large operating angle, and that is free from the risk of damage to the shoulders of the ball grooves.
問題点を解決するための手段
この考案は、球面上内周面に複数の円弧状ボー
ル溝が設けられた外側継手部材と、球面状外周面
に前記外側継手部材のボール溝と同数の円弧状ボ
ール溝が設けられた内側継手部材と、外内両継手
部材のそれぞれのボール溝内に配置されるボール
と、前記内外両継手部材の球面状内外両周面に案
内され前記ボールを収容するケージとよりなり、
該ケージに収容されたボールを外内両継手部材の
両軸線のなす角度の2等分平面上に確保する為に
外内両継手部材の共働する両ボール溝の溝底が開
口側に向かつて楔状に開いている等速自在継手に
於いて、前記外内両継手部材の各ボール溝はボー
ルに対して一定の接触角をもつて接触する軌道面
で構成されており、少なくとも一方のボール溝の
軸方向全域或いは溝深さの浅い部分で、ボール溝
の軌道面のボールと接する点から溝肩側を、溝底
側の円弧の曲率半径より大きな曲率半径の円弧で
形成することにより、ボール溝の溝深さが浅い部
分でもボールとボール溝との間に生じる接触楕円
がボール溝からはみでないようにしたものであ
る。なお、この考案は、溝肩側の曲率半径を無限
大にしたものとして、溝肩側が溝底側に対して接
線をなすものも含む。Means for Solving the Problems This invention provides an outer joint member having a plurality of arc-shaped ball grooves on a spherical inner peripheral surface, and an outer joint member having the same number of arc-shaped ball grooves as the ball grooves of the outer joint member on the spherical outer peripheral surface. An inner joint member provided with a ball groove, a ball disposed in each ball groove of both the outer and inner joint members, and a cage that is guided by the spherical inner and outer circumferential surfaces of the inner and outer joint members and accommodates the ball. And so,
In order to secure the balls housed in the cage on a plane that bisects the angle formed by both axes of the outer and inner joint members, the groove bottoms of both ball grooves that cooperate with each other in the outer and inner joint members are directed toward the opening side. In the past, in wedge-shaped constant velocity universal joints, each ball groove of the outer and inner joint members was composed of a raceway surface that contacted the balls at a constant contact angle, and at least one of the balls By forming the groove shoulder side from the point of contact with the ball on the raceway surface of the ball groove with a circular arc with a radius of curvature larger than the radius of curvature of the circular arc on the groove bottom side in the entire axial direction of the groove or in the shallow groove depth, The contact ellipse formed between the ball and the ball groove does not protrude from the ball groove even in a portion where the groove depth of the ball groove is shallow. Note that this invention also includes a structure in which the radius of curvature on the groove shoulder side is made infinite, and the groove shoulder side forms a tangent to the groove bottom side.
実施例
第1図はこの考案に係る等速自在継手の縦断面
図で、10は外側継手部材、20は内側継手部
材、30はボール、40はケージをそれぞれ示し
ている。Embodiment FIG. 1 is a longitudinal sectional view of a constant velocity universal joint according to this invention, in which 10 indicates an outer joint member, 20 an inner joint member, 30 a ball, and 40 a cage.
外側継手部材10と内側継手部材20とにはそ
れぞれ複数個のボール溝11,21が円周等配位
置に対向させて設けてあり、これらのボール溝1
1,21は軸方向に円弧状に延びている。 The outer joint member 10 and the inner joint member 20 are each provided with a plurality of ball grooves 11 and 21 facing each other at equidistant positions on the circumference.
1 and 21 extend in an arc shape in the axial direction.
外側継手部材10のボール溝11は継手の中心
Oに対して偏心させた点Aに曲率中心を持つ円弧
で形成され、また、内側継手部材20のボール溝
21は継手の中心Oに対して前記点Aと反対側に
等距離だけ偏心させた点A′に曲率中心を持つ円
弧で形成されている。 The ball groove 11 of the outer joint member 10 is formed by a circular arc having its center of curvature at a point A eccentric with respect to the center O of the joint. It is formed by a circular arc with its center of curvature at point A', which is eccentrically equidistant to the opposite side of point A.
そして、外側継手部材10のボール溝11は、
第2図に示すように、ボール30に対して一定の
接触角αを持つて接触する2つの軌道面11a,
11aから形成されており、この軌道面11a
は、接触角αを変化させることなく、ボール30
との接触点Cを境界に溝底側11a′と溝肩側11
a″の2つの部分に分けられ、その溝底側11a′が
ボール30の曲率半径rより大きな曲率半径Rの
円弧状に形成されると共に、溝肩側11a″が溝底
側11a′と接する直線状に形成されている。 The ball groove 11 of the outer joint member 10 is
As shown in FIG. 2, two raceway surfaces 11a contact the ball 30 with a constant contact angle α,
11a, and this raceway surface 11a
is the ball 30 without changing the contact angle α.
The groove bottom side 11a' and the groove shoulder side 11 with the contact point C as the boundary
a'', the groove bottom side 11a' is formed in an arc shape with a radius of curvature R larger than the radius of curvature r of the ball 30, and the groove shoulder side 11a'' is in contact with the groove bottom side 11a'. It is formed in a straight line.
一方、ケージ40は継手の中心Oに曲率中心を
持つ球面状外周面41及び球面状内周面42を有
し、これと対応して外側継手部材10及び内側継
手部材20に球面状内周面12及び外周面22が
設けられており、これらを球面接触させて組合わ
せている。 On the other hand, the cage 40 has a spherical outer peripheral surface 41 and a spherical inner peripheral surface 42 having a center of curvature at the center O of the joint, and correspondingly, the outer joint member 10 and the inner joint member 20 have spherical inner peripheral surfaces. 12 and an outer peripheral surface 22 are provided, and these are combined in spherical contact.
以上の構造により、ボール30は外内両継手部
材10,20がどのような作動角θをとるときで
も、外内両継手部材10,20の両軸線X−X、
X′−X′の2等分面上に配置され、等速性が確保
される。 With the above structure, the ball 30 maintains the axis X-X of the outer and inner joint members 10 and 20, no matter what operating angle θ the outer and inner joint members 10 and 20 take.
It is placed on the bisecting plane of X'-X' to ensure constant velocity.
そして、第3図に示すように、外内両継手部材
10,20が大きな作動角θをとつた場合でも、
外側継手部材10のボール溝11の奥底部近傍に
位置するボール30とボール溝11との間に生じ
る接触楕円Mがボール溝11からはみでることが
なく、充分な負荷トルクの伝達能力が得られる。
即ち、軌道面11aの溝底側11a′ではボール3
0との曲率比(ボールの曲率半径rとボール溝の
軌道面の曲率半径Rの比R/r)が小さい為、接
触楕円Mの長軸側半径aRは大きくなり、軌道面
11aの溝肩側11a″ではボール30との曲率比
が大きい為、接触楕円Mの長軸側半径aLは小さ
くなるからボール溝11の溝深さが浅くなつて
も、接触楕円Mはボール溝からはみでることはな
くなる。 As shown in FIG. 3, even when both the outer and inner joint members 10, 20 take a large operating angle θ,
The contact ellipse M generated between the ball 30 and the ball groove 11 located near the deep bottom of the ball groove 11 of the outer joint member 10 does not protrude from the ball groove 11, and sufficient load torque transmission ability is obtained.
That is, on the groove bottom side 11a' of the raceway surface 11a, the ball 3
Since the curvature ratio (ratio R/r of the radius of curvature r of the ball to the radius of curvature R of the raceway surface of the ball groove) is small, the long axis side radius aR of the contact ellipse M becomes large, and the groove shoulder of the raceway surface 11a Since the curvature ratio with respect to the ball 30 is large on the side 11a'', the long axis side radius aL of the contact ellipse M becomes small, so even if the groove depth of the ball groove 11 becomes shallow, the contact ellipse M will not protrude from the ball groove. It disappears.
以上の説明は外側継手部材10のボール溝11
について述べたが、内側継手部材20のボール溝
21についても同様である。第4図は内側継手部
材20のボール溝21の断面図で、21a,21
aは軌道面、21a′は軌道面21aの溝底側、2
1a″は軌道面21aの溝肩側、R′は軌道面21
aの溝底側の12a″の曲率半径である。 The above explanation is based on the ball groove 11 of the outer joint member 10.
However, the same applies to the ball groove 21 of the inner joint member 20. FIG. 4 is a sectional view of the ball groove 21 of the inner joint member 20, 21a, 21
a is the raceway surface, 21a' is the groove bottom side of the raceway surface 21a, 2
1a″ is the groove shoulder side of the raceway surface 21a, R′ is the raceway surface 21
This is the radius of curvature of 12a'' on the groove bottom side of a.
尚、本考案は、第4図に示したように大きな作
動角θをとつたときに特に問題となるいずれか一
方すなわち、外側継手部材10もしくは内側継手
部材20について実施してもよいし、または両方
10,20について実施することもできる。ま
た、実施例では軌道面11a,21aの溝肩側1
1a″,21a″を溝底側11a′,21a′の接線で形
成させたが、第5図に示すように溝底側11a′,
21a′の曲率半径R1,R1′より大きな曲率半径
R2、R2′で溝肩側11a″,21a″を形成させても
よい。換言すれば、溝肩側が溝底側に対して接線
をなすのは、溝肩側の曲率半径を無限大とした場
合である。また、軌道面11a,21aの溝肩側
11a″,21a″はボール溝11,21の全域で溝
底側11a′,21a′の接線或いは大きな曲率半径
の曲線を形成しなくてもボール溝11,21の浅
い部分にのみ形成するだけでも良い。 The present invention may be applied to either one of the outer joint member 10 or the inner joint member 20, which is particularly problematic when a large operating angle θ is taken as shown in Fig. 4, or to both 10 and 20.
1a'', 21a'', are formed by tangents of the groove bottom sides 11a', 21a'.
The radius of curvature R 1 of 21a' is larger than the radius of curvature R 1 '
The groove shoulder sides 11a", 21a" may be formed at R2 , R2 '. In other words, the groove shoulder sides form a tangent to the groove bottom side when the radius of curvature of the groove shoulder side is infinite. Also, the groove shoulder sides 11a", 21a" of the raceway surfaces 11a, 21a do not have to form a tangent to the groove bottom sides 11a', 21a' or a curve with a large radius of curvature over the entire area of the ball grooves 11, 21; they may be formed only in the shallow portions of the ball grooves 11, 21.
考案の効果
この考案は、外内両継手部材に設けられたボー
ル溝の溝深さの浅いところで、ボール溝を形成す
る軌道面の溝肩側を溝底側の円弧との接線或いは
溝底側の円弧の曲率半径より大きい曲率半径の円
弧に形成するようにしたから、ボールとボール溝
との間に生じる接触楕円が該ボール溝からはみで
ることがなく、したがつてボール溝の肩部の損傷
を防止して耐久性の向上が図れ、充分な負荷トル
クの伝達能力が得られる。なお、接触角を一定と
しているため、外・内両継手部材における接触角
が作動角にかかわりなく常に相等しく、したがつ
て、トルク損失を増大させるような好ましくない
接触力の生ずる虞れがない。Effects of the device This device is capable of connecting the groove shoulder side of the raceway surface forming the ball groove to a tangent to the arc of the groove bottom side or the groove bottom side at the shallow groove depth of the ball groove provided in both the outer and inner joint members. Since the arc is formed into an arc with a radius of curvature larger than the radius of curvature of the arc of the ball, the contact ellipse that occurs between the ball and the ball groove does not protrude from the ball groove, thereby preventing damage to the shoulder of the ball groove. By preventing this, durability can be improved and sufficient load torque transmission ability can be obtained. In addition, since the contact angle is constant, the contact angles on both the outer and inner joint members are always equal regardless of the operating angle, and therefore there is no possibility of undesirable contact force that would increase torque loss. .
第1図はこの考案に係る等速自在継手の縦断面
図、第2図は外側継手部材のボール溝の断面図、
第3図は内側継手部材のボール溝の断面図、第4
図はこの考案の作動状態時の縦断面図、第5図は
外側継手部材及び内側継手部材のボール溝の他の
例を示す断面図、第6図は従来の等速自在継手の
縦断面図、第7図はその作動状態時の縦断面図、
第8図及び第9図は外側継手部材のボール溝の開
口部分及び奥底部分の断面図である。
10……外側継手部材、20……内側継手部
材、11,21……外内側継手部材のボール溝、
11a,11a,21a,21a……軌道面、1
1a′,21a′……溝底側軌道面、11a″,21
a″……溝肩側軌道面、30……ボール、40……
ケージ。
FIG. 1 is a longitudinal sectional view of the constant velocity universal joint according to this invention, FIG. 2 is a sectional view of the ball groove of the outer joint member,
Figure 3 is a cross-sectional view of the ball groove of the inner joint member;
The figure is a longitudinal cross-sectional view of this device in an operating state, FIG. 5 is a cross-sectional view showing another example of ball grooves in the outer joint member and the inner joint member, and FIG. 6 is a longitudinal cross-sectional view of a conventional constant velocity universal joint. , FIG. 7 is a longitudinal cross-sectional view in its operating state,
FIGS. 8 and 9 are cross-sectional views of the opening portion and the bottom portion of the ball groove of the outer joint member. 10... Outer joint member, 20... Inner joint member, 11, 21... Ball groove of outer inner joint member,
11a, 11a, 21a, 21a...orbital surface, 1
1a', 21a'... Groove bottom side raceway surface, 11a'', 21
a″...Groove shoulder side raceway surface, 30...Ball, 40...
cage.
Claims (1)
側継手部材と、球面状外周面に前記外側継手部材
のボール溝と同数の円弧状ボール溝が設けられた
内側継手部材と、外内両継手部材のそれぞれのボ
ール溝内に配置されるボールと、前記外内両継手
部材の球面状内外両周面に案内され前記ボールを
収容するケージとよりなり、該ケージに収容され
たボールを外内両継手部材の両軸線をなす角度の
2等分平面上に確保する為に外内両継手部材の共
働する両ボール溝の溝底が開口側に向かつて楔状
に開いている等速自在継手に於いて、前記外内両
継手部材の各ボール溝はボールに対して一定の接
触角をもつて接触する軌道面で構成されており、
少なくとも一方のボール溝の軌道面の軸方向全域
或いは溝深さの浅い部分で、ボール溝の軌道面の
ボールと接する点から溝肩側を、溝底側の円弧の
曲率半径より大きな曲率半径の円弧で形成したこ
とを特徴とする等速自在継手。 an outer joint member having an arcuate ball groove on its spherical inner peripheral surface; an inner joint member having the same number of arcuate ball grooves as the ball grooves of the outer joint member on its spherical outer peripheral surface; It consists of balls arranged in respective ball grooves of the joint members, and a cage that accommodates the balls guided by the spherical inner and outer circumferential surfaces of the outer and inner joint members, and the balls accommodated in the cages are The groove bottoms of both ball grooves that work together in the outer and inner joint members open in a wedge shape toward the opening side to ensure constant velocity on the plane that bisects the angle that forms both axes of the inner and outer joint members. In the joint, each ball groove of both the outer and inner joint members is composed of a raceway surface that contacts the ball at a constant contact angle,
In the entire axial direction of the raceway surface of at least one ball groove or in the shallow groove depth, from the point of contact with the ball on the raceway surface of the ball groove to the groove shoulder side, the radius of curvature is larger than the radius of curvature of the arc on the groove bottom side. A constant velocity universal joint characterized by being formed by a circular arc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5673984U JPS60167817U (en) | 1984-04-17 | 1984-04-17 | constant velocity universal joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5673984U JPS60167817U (en) | 1984-04-17 | 1984-04-17 | constant velocity universal joint |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60167817U JPS60167817U (en) | 1985-11-07 |
JPS646413Y2 true JPS646413Y2 (en) | 1989-02-20 |
Family
ID=30580619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5673984U Granted JPS60167817U (en) | 1984-04-17 | 1984-04-17 | constant velocity universal joint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60167817U (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004011760A (en) * | 2002-06-06 | 2004-01-15 | Toyoda Mach Works Ltd | Constant velocity joint |
JP2012072865A (en) * | 2010-09-29 | 2012-04-12 | Ntn Corp | Fixed constant velocity universal joint |
JP5784423B2 (en) * | 2011-09-05 | 2015-09-24 | Ntn株式会社 | Fixed constant velocity universal joint |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58214019A (en) * | 1982-06-07 | 1983-12-13 | Toyota Motor Corp | Equal-speed ball joint |
-
1984
- 1984-04-17 JP JP5673984U patent/JPS60167817U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58214019A (en) * | 1982-06-07 | 1983-12-13 | Toyota Motor Corp | Equal-speed ball joint |
Also Published As
Publication number | Publication date |
---|---|
JPS60167817U (en) | 1985-11-07 |
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