JP6704268B2 - Fixed type constant velocity universal joint - Google Patents

Fixed type constant velocity universal joint Download PDF

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JP6704268B2
JP6704268B2 JP2016043440A JP2016043440A JP6704268B2 JP 6704268 B2 JP6704268 B2 JP 6704268B2 JP 2016043440 A JP2016043440 A JP 2016043440A JP 2016043440 A JP2016043440 A JP 2016043440A JP 6704268 B2 JP6704268 B2 JP 6704268B2
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joint member
track groove
center
curvature
spherical surface
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JP2017160934A (en
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雅司 船橋
雅司 船橋
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NTN Corp
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NTN Corp
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    • 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
    • F16D3/22—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/224—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、自動車や各種産業機械において適用される固定型等速自在継手に関する。 The present invention relates to a fixed type constant velocity universal joint applied to automobiles and various industrial machines.

固定式等速自在継手として、バーフィールド型（ＢＪ）やアンダーカットフリー型（ＵＪ）の等速自在継手が知られている。近年では、軽量・コンパクトを兼ね備えた８個ボールタイプのＢＪ及びＵＪもあり、目的に応じて様々な固定式等速自在継手を使い分けている。 As a fixed type constant velocity universal joint, a Barfield type (BJ) or an undercut free type (UJ) constant velocity universal joint is known. In recent years, there are also 8-ball type BJ and UJ that are both lightweight and compact, and various fixed type constant velocity universal joints are used according to the purpose.

また、８個ボールタイプであっても、ケージの外球面と外側継手部材の内球面との接触、及びケージの内球面と内側継手部材の外球面との接触により発熱し、耐久性が低下する可能性があった。そこで、ケージの外球面と外側継手部材の内球面との接触、及びケージの内球面と内側継手部材の外球面との接触を低減させて、低発熱化を狙った、トラック交差タイプの等速自在継手が種々提案されている（特許文献１）。 Even with the eight-ball type, heat is generated due to the contact between the outer spherical surface of the cage and the inner spherical surface of the outer joint member, and the contact between the inner spherical surface of the cage and the outer spherical surface of the inner joint member, which lowers the durability. There was a possibility. Therefore, by reducing the contact between the outer spherical surface of the cage and the inner spherical surface of the outer joint member, and the contact between the inner spherical surface of the cage and the outer spherical surface of the inner joint member, a constant velocity of a track crossing type aiming at low heat generation. Various universal joints have been proposed (Patent Document 1).

また、外側継手部材の開口端面（大端面）にカット部を設けることによって、ケージの高角強度化を図ったものがある（特許文献２）。このように、カット部を設けることによって、外側継手部材の開口端面の位置を後退させることなく、ボールの組込み性の向上を図っている。 Further, there is one in which a cage is provided with a high angle strength by providing a cut portion on the open end surface (large end surface) of the outer joint member (Patent Document 2). In this way, by providing the cut portion, the assemblability of the ball is improved without retreating the position of the opening end surface of the outer joint member.

図２３〜図３５に、トルク伝達部材としのボールを８個とし、トラック溝の曲率中心の軸方向オフセットを０とし、隣り合うトラック溝を傾斜させていた固定式等速自在継手を示している。 23 to 35 show a fixed type constant velocity universal joint in which eight balls as torque transmitting members are used, the axial offset of the curvature center of the track grooves is set to 0, and adjacent track grooves are inclined. ..

この固定式等速自在継手は、内球面１に複数のトラック溝２が形成された外側継手部材３と、外球面４に外側継手部材３のトラック溝２と対をなす複数のトラック溝５が形成された内側継手部材６と、外側継手部材３のトラック溝２と内側継手部材６のトラック溝５との間に介在してトルクを伝達する複数のボール７と、外側継手部材３の内球面１と内側継手部材６の外球面４との間に介在してボール７を保持するケージ８とを備えている。 In this fixed type constant velocity universal joint, an outer joint member 3 having a plurality of track grooves 2 formed on an inner spherical surface 1 and a plurality of track grooves 5 paired with the track groove 2 of the outer joint member 3 on an outer spherical surface 4 are provided. The formed inner joint member 6, a plurality of balls 7 that are interposed between the track groove 2 of the outer joint member 3 and the track groove 5 of the inner joint member 6 to transmit torque, and the inner spherical surface of the outer joint member 3. 1 and an outer spherical surface 4 of the inner joint member 6 to interpose a cage 8 for holding the ball 7.

外側継手部材３のトラック溝２の曲率中心Ｏ１と、内側継手部材６のトラック溝５の曲率中心Ｏ２との軸方向のオフセットを０としている。すなわち、曲率中心Ｏ１と曲率中心Ｏ２とを継手中心Ｏに一致させている。 The axial offset between the center O1 of curvature of the track groove 2 of the outer joint member 3 and the center O2 of curvature of the track groove 5 of the inner joint member 6 is zero. That is, the center of curvature O1 and the center of curvature O2 coincide with the joint center O.

図２５〜図２８に示すように、外側継手部材３において、各トラック溝２を軸方向に対して傾斜させている。この場合、周方向に隣合うトラック溝２の傾斜方向を相反させている。すなわち、図２７に示すように、トラック溝２Ａが、奥側から開口側に向かって時計廻り方向に軸線Ｌに対して角度γだけ傾斜する場合、このトラック溝２Ａに対して時計廻り方向に隣合う他のトラック溝２Ｂは、奥側から開口側に向かって反時計廻り方向に軸線Ｌに対してγだけ傾斜する。また、図２８に示すように、トラック溝２の曲率中心Ｏ１と、内球面１の曲率中心Ｏ５とはオフセットされることなく一致させている。 As shown in FIGS. 25 to 28, in the outer joint member 3, each track groove 2 is inclined with respect to the axial direction. In this case, the inclination directions of the track grooves 2 adjacent to each other in the circumferential direction are opposite to each other. That is, as shown in FIG. 27, when the track groove 2A is inclined from the back side toward the opening side in the clockwise direction by an angle γ with respect to the axis L, it is adjacent to the track groove 2A in the clockwise direction. The other matching track groove 2B is inclined in the counterclockwise direction from the back side toward the opening side by γ with respect to the axis L. Further, as shown in FIG. 28, the center of curvature O1 of the track groove 2 and the center of curvature O5 of the inner spherical surface 1 are aligned without being offset.

また、図２９〜図３２に示すように、内側継手部材６において、各トラック溝５を軸方向に対して傾斜させている。この場合、周方向に隣合うトラック溝５の傾斜方向を相反させている。すなわち、図３１に示すように、トラック溝５Ａが、奥側から開口側に向かって反時計廻り方向に軸線Ｌに対して角度γ（外側継手部材３のトラック溝２と同じ角度）だけ傾斜する場合、このトラック溝５Ａに対して時計廻り方向に隣合う他のトラック溝５Ｂは、奥側から開口側に向かって時計廻り方向に軸線Ｌに対してγだけ傾斜する。また、図３２に示すように、トラック溝５の曲率中心Ｏ２と、外球面４の曲率中心Ｏ６とはオフセットされることなく一致させている。 Further, as shown in FIGS. 29 to 32, in the inner joint member 6, each track groove 5 is inclined with respect to the axial direction. In this case, the inclination directions of the track grooves 5 adjacent to each other in the circumferential direction are opposite to each other. That is, as shown in FIG. 31, the track groove 5A is inclined from the back side toward the opening side in the counterclockwise direction by an angle γ (the same angle as the track groove 2 of the outer joint member 3) with respect to the axis L. In this case, another track groove 5B adjacent to the track groove 5A in the clockwise direction is inclined by γ with respect to the axis L in the clockwise direction from the inner side toward the opening side. Further, as shown in FIG. 32, the center of curvature O2 of the track groove 5 and the center of curvature O6 of the outer spherical surface 4 are aligned without being offset.

ケージ８は、図３３と図３４に示すように、円環状体であって、その周壁にボール７（図２３参照）が収容されるケージ窓８ｄが周方向に沿って複数配設されている。また、図３５に示すように、外球面８ａの曲率中心Ｏ７と、内球面８ｂの曲率中心Ｏ８とを一致させている。 As shown in FIGS. 33 and 34, the cage 8 is an annular body, and a plurality of cage windows 8d for accommodating the balls 7 (see FIG. 23) are arranged in the circumferential wall along the circumferential direction. .. Further, as shown in FIG. 35, the center of curvature O7 of the outer spherical surface 8a and the center of curvature O8 of the inner spherical surface 8b are aligned.

これ等の等速自在継手は、近年自動車に求められる環境性能への対応に有効な手段となりつつある。また、トラック交差タイプの等速自在継手は、低発熱であることから、ドライブシャフトだけでなく、４ＷＤ車（４輪駆動車）やＦＲ車（後輪駆動車）等においてトランスミッションからディファレンシャルに回転駆動力を伝達するプロペラシャフトにおいても性能を発揮することができる。 These constant velocity universal joints are becoming effective means for meeting the environmental performance required of automobiles in recent years. In addition, since the track crossing type constant velocity universal joint has low heat generation, not only the drive shaft but also 4WD vehicles (four-wheel drive vehicles) and FR vehicles (rear-wheel drive vehicles) are driven to rotate differentially from the transmission. The performance can be exhibited even in a propeller shaft that transmits force.

特開２００９−２５０３６５公報JP, 2009-250365, A 特開平１１−１０１２５６公報JP-A-11-101256

ところで、前記したように、隣り合うトラック溝を傾斜させた固定式等速自在継手では、円周方向のボール移動量が大きく、ケージ窓長さを大きくする必要がある。しかしながら、ケージ窓長さを大きくすると、ケージの窓柱が細くなり、ケージ強度の確保が困難となる。また、ケージ柱の太さを確保するため、ボールを組込む際の組込角度を可能な限り小さくする必要がある。 By the way, as described above, in a fixed type constant velocity universal joint in which adjacent track grooves are inclined, the amount of ball movement in the circumferential direction is large, and it is necessary to increase the cage window length. However, if the cage window length is increased, the window post of the cage becomes thin, and it becomes difficult to secure the cage strength. Further, in order to secure the thickness of the cage column, it is necessary to make the assembling angle when assembling the ball as small as possible.

このため、図２０と図２１に示すように、最大作動角で外側継手部材３の開口端面３ａとシャフトＳが干渉する位置に、テーパ部１０を設け、さらには、組込む用のカット部１１を設けるようにすることができる。このように設定することによって、組込角を小さくしながら、外側継手部材３のトラック溝２とボール７との接触長さを確保することができる。 Therefore, as shown in FIGS. 20 and 21, the tapered portion 10 is provided at a position where the opening end surface 3a of the outer joint member 3 and the shaft S interfere with each other at the maximum operating angle, and further, the cut portion 11 for incorporation is provided. It can be provided. With this setting, it is possible to secure the contact length between the track groove 2 of the outer joint member 3 and the ball 7 while reducing the mounting angle.

ところで、外側継手部材３は、図２２に示すように、内径面のトラック溝２が形成されたマウス部１２と、このマウス部１２の底壁１２ａから突設されるステム部１３とからなる。そして、このステム部１３に雄スプラインを形成する必要がある。この雄スプライン形成は、図２２に示すようなチャック機構１５にて外側継手部材３を支持して行う。 As shown in FIG. 22, the outer joint member 3 includes a mouth portion 12 in which the track groove 2 on the inner diameter surface is formed, and a stem portion 13 projecting from a bottom wall 12 a of the mouth portion 12. Then, it is necessary to form a male spline on the stem portion 13. This male spline formation is performed by supporting the outer joint member 3 with the chuck mechanism 15 as shown in FIG.

このチャック機構１５は、外側継手部材３のステム部１３の端面のセンタ穴１６に先端部が嵌合されるセンタ１７と、このセンタ１７に相対面するように配設されるチャック部１８とを備える。このチャック部１８は、円盤状基部１８ａと、この円盤状基部１８ａから連設される円すい台形状部１８ｂとからなる。そして、この円すい台形状部１８ｂが、外側継手部材３のテーパ部１０に内径側から圧接（押圧）させるものである。 The chuck mechanism 15 includes a center 17 having a tip portion fitted in a center hole 16 in an end surface of the stem portion 13 of the outer joint member 3, and a chuck portion 18 arranged so as to face the center 17. Prepare The chuck portion 18 includes a disc-shaped base portion 18a and a truncated cone-shaped portion 18b that is continuously provided from the disc-shaped base portion 18a. The truncated cone-shaped portion 18b presses (presses) the tapered portion 10 of the outer joint member 3 from the inner diameter side.

しかしながら、図２０及び図２１に示すものでは、テーパ部１０はその長さ寸法が比較的短く、図２２に示すようなチャック部１８を用いると、製品保持（外側継手部材保持）が安定しない。このため、加工精度にバラツキが生じるおそれがある。 However, in the case shown in FIGS. 20 and 21, the taper portion 10 has a relatively short length dimension, and when the chuck portion 18 as shown in FIG. 22 is used, product holding (outer joint member holding) is not stable. For this reason, there is a possibility that processing accuracy may vary.

そこで、本発明は、外側継手部材のトラック溝とボールとの接触長さを確保したまま、安定した加工精度を達成できる固定式等速自在継手を提供する。 Therefore, the present invention provides a fixed type constant velocity universal joint that can achieve stable processing accuracy while ensuring the contact length between the track groove of the outer joint member and the ball.

本発明の固定式等速自在継手は、内球面に複数個のトラック溝が形成された外側継手部材と、外球面に外側継手部材のトラック溝と対をなす複数個のトラック溝が形成された内側継手部材と、外側継手部材のトラック溝と内側継手部材のトラック溝との間に介在してトルクを伝達する複数個のボールと、外側継手部材の内球面と内側継手部材の外球面との間に介在してボールを保持するケージ窓を有するケージとを備えた固定式等速自在継手であって、前記外側継手部材の開口端面部に、加工用チャックのテーパチャック面にて受けられるチャック部を設け、このチャック部が、外側継手部材のトラック溝とボールとの接触楕円の長軸方向と平行なテーパ部であるものである。 In the fixed type constant velocity universal joint of the present invention, an outer joint member having a plurality of track grooves formed on the inner spherical surface and a plurality of track grooves paired with the track grooves of the outer joint member are formed on the outer spherical surface. An inner joint member, a plurality of balls interposed between the track groove of the outer joint member and the track groove of the inner joint member to transmit torque, an inner spherical surface of the outer joint member and an outer spherical surface of the inner joint member A fixed type constant velocity universal joint having a cage having a cage window for holding balls interposed therebetween, wherein the chuck is received by a taper chuck surface of a machining chuck at an opening end surface portion of the outer joint member. The chuck portion is a tapered portion parallel to the major axis direction of the contact ellipse between the track groove of the outer joint member and the ball.

外側継手部材のトラック溝とボールとの接触楕円の長軸方向と平行なテーパ部を設けているので、ボールの組込み角を小さくでき、しかも、外側継手部材の加工時（ステム部に対してスプライン形成加工（転造加工）等）において、このテーパ部を利用してチャックすることができる。この際、テーパ部は、外側継手部材のトラック溝とボールとの接触楕円の長軸方向と平行なテーパ面であるので、加工用チャックのテーパチャック面との接触長さを比較的長く設定でき、ワークである外側継手部材を安定して保持できる。 Since the taper that is parallel to the major axis of the contact ellipse between the track groove of the outer joint member and the ball is provided, the ball mounting angle can be reduced, and when the outer joint member is machined (spline to the stem portion). In the forming process (rolling process) or the like, the taper portion can be used for chucking. At this time, since the taper portion is a taper surface parallel to the major axis direction of the contact ellipse between the track groove of the outer joint member and the ball, the contact length with the taper chuck surface of the machining chuck can be set to be relatively long. The outer joint member, which is a work, can be stably held.

外側継手部材のトラック溝の曲率中心と外側継手部材の内球面の曲率中心の軸方向のオフセットと、内側継手部材のトラック溝の曲率中心と内側継手部材の外球面の曲率中心の軸方向のオフセットとを０とし、外側継手部材のトラック溝及び内側継手部材のトラック溝をそれぞれ軸線に対して傾斜させるとともに、周方向に隣合うトラック溝の傾斜方向を相反させ、かつ外側継手部材のトラック溝とこれに対向する内側継手部材のトラック溝を軸線に対して反対方向に傾斜させたものとできる。 Axial offset between the center of curvature of the track groove of the outer joint member and the center of curvature of the inner spherical surface of the outer joint member, and axial offset of the center of curvature of the track groove of the inner joint member and the center of curvature of the outer spherical surface of the inner joint member. Is set to 0, the track groove of the outer joint member and the track groove of the inner joint member are respectively inclined with respect to the axis, the inclination directions of the track grooves adjacent to each other in the circumferential direction are made opposite to each other, and The track groove of the inner joint member facing this may be inclined in the opposite direction with respect to the axis.

前記外側継手部材のトラック溝は奥側に位置する第１のトラック溝部と開口側に位置する第２のトラック溝部とからなるものであってもよい。この際、第１のトラック溝部の溝底が円弧部とされ、第２のトラック溝部の溝底がストレート部とされ、前記ストレート部は、第１のトラック溝部と第２のトラック溝部との接続部での第１のトラック溝部の接線となるのが好ましい。 The track groove of the outer joint member may be composed of a first track groove portion located on the inner side and a second track groove portion located on the opening side. At this time, the groove bottom of the first track groove portion is an arc portion, the groove bottom of the second track groove portion is a straight portion, and the straight portion connects the first track groove portion and the second track groove portion. It is preferable that it is a tangent line of the first track groove portion at the portion.

前記ケージの外球面の曲率中心とケージの内球面の曲率中心とは、継手中心に対して軸方向にオフセットしているものであっても、外側継手部材のトラック溝の曲率中心と内側継手部材のトラック溝の曲率中心とが、継手中心に対して径方向にオフセットしているものであってもよい。 Even if the center of curvature of the outer spherical surface of the cage and the center of curvature of the inner spherical surface of the cage are axially offset with respect to the joint center, the center of curvature of the track groove of the outer joint member and the inner joint member The center of curvature of the track groove may be offset from the joint center in the radial direction.

本発明では、ボールの組込み角を小さくできるので、ケージ窓の周方向長さを小さくでき、これによって、ケージのケージ窓柱（周方向に隣り合うケージ窓間の柱部）の周方向長さを大きく設定できて、ケージの強度向上を図ることができる。また、外側継手部材の加工時（ステム部に対してスプライン形成加工（転造加工）等）において、ワークである外側継手部材を安定して保持できるので、加工精度の向上を図ることができる。 According to the present invention, since the mounting angle of the balls can be made small, the circumferential length of the cage window can be made small, which makes it possible to make the circumferential length of the cage window pillar (column portion between the cage windows adjacent in the circumferential direction) of the cage. Can be set large, and the strength of the cage can be improved. In addition, since the outer joint member, which is a workpiece, can be stably held during processing of the outer joint member (spline forming processing (rolling processing) for the stem portion), it is possible to improve machining accuracy.

本発明の固定式等速自在継手の断面図である。It is sectional drawing of the fixed type constant velocity universal joint of this invention. 図１に示す固定式等速自在継手の外側継手部材の断面図である。It is sectional drawing of the outer side joint member of the fixed type constant velocity universal joint shown in FIG. 図１に示す固定式等速自在継手の外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer side joint member of the fixed type constant velocity universal joint shown in FIG. 図１に示す固定式等速自在継手の外側継手部材の加工時の断面図である。It is sectional drawing at the time of processing of the outer side joint member of the fixed type constant velocity universal joint shown in FIG. 外側継手部材の変形例の断面図である。It is sectional drawing of the modification of an outer joint member. 第１のトラック溝部と第２のトラック溝部とを有する外側継手部材の要部断面図である。It is a principal part sectional view of the outer joint member which has a 1st track groove part and a 2nd track groove part. 図６に示す外側継手部材の要部拡大断面図である。It is a principal part expanded sectional view of the outer joint member shown in FIG. 図６に示す外側継手部材の斜視図である。It is a perspective view of the outer joint member shown in FIG. 第１のトラック溝部と第２のトラック溝部とを有する内側継手部材の側面図である。It is a side view of an inside joint member which has the 1st track groove part and the 2nd track groove part. 図９の内側継手部材の断面図である。It is sectional drawing of the inner side joint member of FIG. ケージの斜視図である。It is a perspective view of a cage. ケージの側面図である。It is a side view of a cage. ケージを示し、（ａ）は外球面の曲率中心と内球面の曲率中心とを一致させたケージの断面図であり、（ｂ）は外球面の曲率中心と内球面の曲率中心とは、継手中心に対して軸方向にオフセットしているケージの断面図である。FIG. 3A is a cross-sectional view of a cage in which the center of curvature of the outer spherical surface and the center of curvature of the inner spherical surface are made to coincide with each other, and FIG. 7B is a joint of the center of curvature of the outer spherical surface and the center of curvature of the inner spherical surface. FIG. 7 is a cross-sectional view of the cage axially offset with respect to the center. 図６に示す外側継手部材と図９に示す内側継手部材とを用いた等速自在継手の作動角をとった状態の断面図である。FIG. 10 is a cross-sectional view of a constant velocity universal joint using the outer joint member shown in FIG. 6 and the inner joint member shown in FIG. 9 at an operating angle. 図１４の等速自在継手の要部拡大断面図である。It is a principal part expanded sectional view of the constant velocity universal joint of FIG. 溝底が円弧部のみのトラック溝を有する等速自在継手の作動角をとった状態の断面図である。It is sectional drawing of the state which took the operating angle of the constant velocity universal joint which has the track groove whose groove bottom is only an arc part. 図１６に示す等速自在継手の要部拡大断面図である。It is a principal part expanded sectional view of the constant velocity universal joint shown in FIG. トラック溝の曲率中心が径方向にオフセットしている外側継手部材の断面図である。It is sectional drawing of the outer joint member by which the curvature center of a track groove is offset in the radial direction. トラック溝の曲率中心が径方向にオフセットしている内側継手部材の断面図である。FIG. 6 is a cross-sectional view of an inner joint member in which a center of curvature of a track groove is offset in a radial direction. 組込む用のカット部を有する外側継手部材を用いた等速自在継手の作動角を取った状態の断面図である。It is sectional drawing of the state which took the operating angle of the constant velocity universal joint which used the outer joint member which has the cut part for incorporating. 図２０の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 図２０の等速自在継手の外側継手部材の加工状態の断面図である。FIG. 21 is a cross-sectional view of a processed state of the outer joint member of the constant velocity universal joint in FIG. 20. 従来の等速自在継手の断面図である。It is sectional drawing of the conventional constant velocity universal joint. 従来の固定式等速自在継手の正面図である。It is a front view of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の外側継手部材の斜視図である。It is a perspective view of the outer joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の外側継手部材の正面図である。It is a front view of the outer joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の外側継手部材の断面図である。It is sectional drawing of the outer joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の外側継手部材の要部断面図である。It is a principal part sectional view of the outer joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の内側継手部材の斜視図である。It is a perspective view of the inner side joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の内側継手部材の正面図である。It is a front view of the inner joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の内側継手部材の側面図である。It is a side view of the inner joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手の内側継手部材の要部断面図である。It is a principal part sectional drawing of the inner side joint member of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手のケージの斜視図である。It is a perspective view of the cage of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手のケージの正面図である。It is a front view of the cage of the conventional fixed type constant velocity universal joint. 従来の固定式等速自在継手のケージの要部断面図である。It is a principal part sectional drawing of the cage of the conventional fixed type constant velocity universal joint.

以下本発明の実施の形態を図１〜図１９に基づいて説明する。図１に実施形態の固定式等速自在継手を示し、この固定式等速自在継手は、内球面２１に複数のトラック溝２２が形成された外側継手部材２３と、外球面２４に外側継手部材２３のトラック溝２２と対をなす個のトラック溝２５が形成された内側継手部材２６と、外側継手部材２３のトラック溝２２と内側継手部材２６のトラック溝２５との間に介在してトルクを伝達する複数のボール２７と、外側継手部材２３の内球面２１と内側継手部材２６の外球面２４との間に介在してボール２７を保持するケージ２８とを備えている。 Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a fixed type constant velocity universal joint of the embodiment. This fixed type constant velocity universal joint has an outer joint member 23 in which a plurality of track grooves 22 are formed in an inner spherical surface 21 and an outer joint member in an outer spherical surface 24. The inner joint member 26 in which the individual track grooves 25 paired with the track groove 22 of 23 are formed, and the torque is interposed between the inner joint member 26 and the track groove 22 of the outer joint member 23 and the track groove 25 of the inner joint member 26. A plurality of balls 27 for transmission and a cage 28 for holding the balls 27 are provided between the inner spherical surface 21 of the outer joint member 23 and the outer spherical surface 24 of the inner joint member 26.

図６及び図８に示すように、外側継手部材２３において、各トラック溝２２を軸方向に対して傾斜させている。この場合、周方向に隣合うトラック溝２２の傾斜方向を相反させている。すなわち、図６に示すように、トラック溝２２Ａが、奥側から開口側に向かって時計廻り方向に軸線Ｌに対して角度γだけ傾斜する場合、このトラック溝２２Ａに対して時計廻り方向に隣合う他のトラック溝２２Ｂは、奥側から開口側に向かって反時計廻り方向に軸線Ｌに対してγだけ傾斜する。また、図７に示すように、トラック溝２２ａの曲率中心Ｏ１と、内球面２１の曲率中心Ｏ５とはオフセットされることなく一致させている。 As shown in FIGS. 6 and 8, in the outer joint member 23, each track groove 22 is inclined with respect to the axial direction. In this case, the inclination directions of the track grooves 22 adjacent to each other in the circumferential direction are opposite to each other. That is, as shown in FIG. 6, when the track groove 22A is inclined in the clockwise direction from the back side toward the opening side by the angle γ with respect to the axis L, it is adjacent to the track groove 22A in the clockwise direction. The other matching track groove 22B is inclined in the counterclockwise direction from the inner side toward the opening side by γ with respect to the axis L. Further, as shown in FIG. 7, the center of curvature O1 of the track groove 22a and the center of curvature O5 of the inner spherical surface 21 are aligned without being offset.

また、図９と図１０に示すように、内側継手部材２６において、各トラック溝２５を軸方向に対して傾斜させている。この場合、周方向に隣合うトラック溝２５の傾斜方向を相反させている。すなわち、図９に示すように、トラック溝２５Ａが、奥側から開口側に向かって反時計廻り方向に軸線Ｌに対して角度γ（外側継手部材２３のトラック溝２２と同じ角度）だけ傾斜する場合、このトラック溝２５Ａに対して時計廻り方向に隣合う他のトラック溝２５Ｂは、奥側から開口側に向かって時計廻り方向に軸線Ｌに対してγだけ傾斜する。また、図１０に示すように、トラック溝２２ａの曲率中心Ｏ２と、外球面２４の曲率中心Ｏ６とはオフセットされることなく一致させている。 Further, as shown in FIGS. 9 and 10, in the inner joint member 26, each track groove 25 is inclined with respect to the axial direction. In this case, the inclination directions of the track grooves 25 adjacent to each other in the circumferential direction are opposite to each other. That is, as shown in FIG. 9, the track groove 25A inclines in the counterclockwise direction from the back side toward the opening side by the angle γ (the same angle as the track groove 22 of the outer joint member 23). In this case, the other track groove 25B adjacent to the track groove 25A in the clockwise direction is inclined by γ with respect to the axis L in the clockwise direction from the inner side toward the opening side. Further, as shown in FIG. 10, the center of curvature O2 of the track groove 22a and the center of curvature O6 of the outer spherical surface 24 are aligned without being offset.

ケージ２８は、図１１と図１２に示すように、円環状体であって、図１１と図１２に示すように、その周壁にボール２７（図１参照）が収容されるケージ窓２８ｄが周方向に沿って複数配設されている。また、図１３（ａ）に示すように、外球面２８ａの曲率中心Ｏ７と、内球面２８ｂの曲率中心Ｏ８とを一致させている。 As shown in FIGS. 11 and 12, the cage 28 is an annular body, and as shown in FIGS. 11 and 12, a cage window 28d for accommodating the balls 27 (see FIG. 1) is provided on the peripheral wall thereof. A plurality is arranged along the direction. Further, as shown in FIG. 13A, the center of curvature O7 of the outer spherical surface 28a and the center of curvature O8 of the inner spherical surface 28b are aligned.

前記のように構成された外側継手部材２３と内側継手部材２６とケージ２８が組み付けられた状態では、外側継手部材２３のトラック溝２２とこれに対応する内側継手部材２６のトラック溝２５とは、軸線に対して反対方向に傾斜させることになる。 In a state where the outer joint member 23, the inner joint member 26, and the cage 28 configured as described above are assembled, the track groove 22 of the outer joint member 23 and the corresponding track groove 25 of the inner joint member 26 are It will be tilted in the opposite direction to the axis.

このように、トラックオフセットを０とし、隣合うトラック溝２２Ａ、２２Ｂ、２５Ａ、２５Ｂを交互に交差させることによって、交互に逆方向のくさび角が発生し、隣合うポケット２８ｄ、２８ｄに交互に力が作用する。このため、ボール２７がケージ２８を押す力が相殺される。従って、ケージ外内球面２８ａ、２８ｂの球面接触が抑制され、高負荷時や高速回転時にこの等速自在継手が円滑に作動し、発熱が抑えられ、耐久性を向上させることができる。ボール数を８個とすることによって、負荷容量を確保しつつ等速自在継手サイズの小型、軽量化が可能となる。 As described above, the track offset is set to 0, and the adjacent track grooves 22A, 22B, 25A, and 25B are alternately crossed, so that the wedge angles in the opposite directions are alternately generated, and the force is applied to the adjacent pockets 28d and 28d alternately. Works. Therefore, the force of the ball 27 pushing the cage 28 is offset. Therefore, spherical contact between the cage outer and inner spherical surfaces 28a and 28b is suppressed, and the constant velocity universal joint operates smoothly under high load or high speed rotation, heat generation is suppressed, and durability can be improved. By using eight balls, it is possible to reduce the size and weight of the constant velocity universal joint while ensuring the load capacity.

ところで、この固定式等速自在継手では図７等に示すように、外側継手部材２３のトラック溝２２は奥側に位置する第１のトラック溝部２２ａと開口側に位置する第２のトラック溝部２２ｂとからなる。この場合、第１のトラック溝部２２ａは溝底が前記曲率中心Ｏ１となる円弧部とされ、第２のトラック溝部２２ｂは溝底がストレート部（直線部）とされる。また、図１０に示すように、内側継手部材２６のトラック溝２５は開口側に位置する第１のトラック溝部２５ａと奥側に位置する第２のトラック溝部２５ｂとからなる。この場合、第１のトラック溝部２５ａは溝底が前記曲率中心Ｏ２となる円弧部とされ、第２のトラック溝部２５ｂは溝底がストレート部（直線部）とされる。 By the way, in this fixed type constant velocity universal joint, as shown in FIG. 7 etc., the track groove 22 of the outer joint member 23 has a first track groove portion 22a located on the inner side and a second track groove portion 22b located on the opening side. Consists of. In this case, the first track groove portion 22a has an arc portion whose bottom is the center of curvature O1, and the second track groove portion 22b has a groove bottom which is a straight portion (straight portion). Further, as shown in FIG. 10, the track groove 25 of the inner joint member 26 is composed of a first track groove portion 25a located on the opening side and a second track groove portion 25b located on the inner side. In this case, the first track groove portion 25a has an arc portion whose bottom is the curvature center O2, and the second track groove portion 25b has a groove bottom which is a straight portion (straight portion).

外側継手部材２３の第１のトラック溝部２２ａと第２のトラック溝部２２ｂとの繋部４０、及び内側継手部材の第１のトラック溝部２５ａと第２のトラック溝部２５ｂとの繋部４１とは、継手中心を通って外側継手部材２３の軸心と直交する平面Ｍに対して所定角度βだけ傾斜した直線Ｌ１，Ｌ２上に位置する。なお、外側継手部材２３側の直線Ｌ１が継手開口側に傾斜し、内側継手部材２６側の直線Ｌ２が継手奥側に傾斜している。 The connecting portion 40 between the first track groove portion 22a and the second track groove portion 22b of the outer joint member 23, and the connecting portion 41 between the first track groove portion 25a and the second track groove portion 25b of the inner joint member, It is located on straight lines L1 and L2 that pass through the joint center and are inclined by a predetermined angle β with respect to a plane M orthogonal to the axis of the outer joint member 23. The straight line L1 on the outer joint member 23 side is inclined toward the joint opening side, and the straight line L2 on the inner joint member 26 side is inclined toward the inner side of the joint.

図２と図３に示すように、外側継手部材２３の開口端面部に、外側継手部材２３のトラック溝２２とボール２７（図１参照）との接触楕円３０の長軸方向と平行なテーパ部３１が設けられている。また、外側継手部材２３の内径面開口端部にはストレート部３２が設けられ、このストレート部３２と、テーパ部３１とのコーナ部には面取部３３が設けられている。なお、この面取部３３は、作動角をとった場合に、内側継手部材２６に嵌入されたシャフトＳ（図２０参照）が接触して、シャフトＳの角度規制を行うものである。 As shown in FIGS. 2 and 3, a tapered portion parallel to the long axis direction of the contact ellipse 30 between the track groove 22 of the outer joint member 23 and the ball 27 (see FIG. 1) is formed on the opening end surface portion of the outer joint member 23. 31 is provided. A straight portion 32 is provided at the open end of the inner diameter surface of the outer joint member 23, and a chamfered portion 33 is provided at the corner between the straight portion 32 and the tapered portion 31. The chamfered portion 33 regulates the angle of the shaft S when the shaft S (see FIG. 20) fitted in the inner joint member 26 comes into contact with the chamfered member when the working angle is taken.

ところで、外側継手部材２３は、図１に示すように、内径面のトラック溝２２が形成されたマウス部４２と、このマウス部４２の底壁４２ａから突設されるステム部４３とからなる。そして、このステム部４３に雄スプライン４６及び雄ねじ４７を形成している。この雄スプライン形成には、図４に示すような加工用チャック４５にて外側継手部材２３を支持して行う。このため、外側継手部材の開口端面部に、加工用チャック４５の後述するテーパチャック面５１にて受けられるチャック部を設ける必要があり、このチャック部が、外側継手部材２３のトラック溝２２とボール２７（図１参照）との接触楕円３０（図３参照）の長軸方向と平行な前記テーパ部３１で構成される。 By the way, as shown in FIG. 1, the outer joint member 23 includes a mouth portion 42 in which the track groove 22 of the inner diameter surface is formed, and a stem portion 43 projecting from a bottom wall 42 a of the mouth portion 42. A male spline 46 and a male screw 47 are formed on the stem portion 43. This male spline is formed by supporting the outer joint member 23 with a processing chuck 45 as shown in FIG. For this reason, it is necessary to provide a chuck portion that can be received by a later-described taper chuck surface 51 of the processing chuck 45 on the opening end surface portion of the outer joint member, and this chuck portion can be used for the track groove 22 of the outer joint member 23 and the ball. 27 (see FIG. 1) and the ellipse 30 (see FIG. 3) is constituted by the tapered portion 31 parallel to the major axis direction.

この加工用チャック４５は、外側継手部材２３のステム部４３の端面のセンタ穴４６に先端部が嵌合させるセンタ４７と、このセンタ４７に相対面するように配設されるチャック部４８とを備える。このチャック部４８は、円盤状基部４８ａと、この円盤状基部４８ａから連設される円すい台形状部４８ｂとからなる。そして、この円すい台形状部４８ｂを、外側継手部材２３のテーパ部３１に内径側から圧接（押圧）させるものである。すなわち、この円すい台形状部４８ｂの外面が、外側継手部材２３のテーパ部３１をチャックするテーパチャック面５１を構成する。 The machining chuck 45 includes a center 47 having a tip portion fitted into a center hole 46 in the end surface of the stem portion 43 of the outer joint member 23, and a chuck portion 48 arranged so as to face the center 47. Prepare The chuck portion 48 is composed of a disc-shaped base portion 48a and a truncated cone-shaped portion 48b continuously provided from the disc-shaped base portion 48a. Then, the truncated cone-shaped portion 48b is pressed (pressed) from the inner diameter side to the tapered portion 31 of the outer joint member 23. That is, the outer surface of the truncated cone-shaped portion 48 b constitutes the tapered chuck surface 51 that chucks the tapered portion 31 of the outer joint member 23.

この等速自在継手では、外側継手部材２３のトラック溝２２とボール２７との接触楕円３０の長軸方向と平行なテーパ部３１を設けているので、ボール２７の組込み角を小さくでき、ケージ窓２８ｄの周方向長さを小さくできる。これによって、ケージ２８のケージ窓柱２８ｃ（周方向に隣り合うケージ窓２８ｄ間の柱部、図１１参照）の周方向長さを大きく設定でき、ケージ２８の強度向上を図ることができる。 In this constant velocity universal joint, since the taper portion 31 parallel to the major axis direction of the contact ellipse 30 between the track groove 22 of the outer joint member 23 and the ball 27 is provided, the installation angle of the ball 27 can be made small and the cage window can be reduced. The circumferential length of 28d can be reduced. Thereby, the circumferential length of the cage window pillar 28c of the cage 28 (the pillar portion between the cage windows 28d adjacent to each other in the circumferential direction, see FIG. 11) can be set large, and the strength of the cage 28 can be improved.

しかも、外側継手部材２３の加工時（ステム部に対してスプライン形成加工（転造加工）等）において、このテーパ部３１を利用してチャックすることができる。この際、テーパ部３１は、外側継手部材２３のトラック溝２２とボール２７との接触楕円３０の長軸方向と平行なテーパ面であり、ワークである外側継手部材２３を安定して保持でき、加工精度の向上を図ることができる。 Moreover, at the time of processing the outer joint member 23 (spline forming processing (rolling processing) for the stem portion), the taper portion 31 can be used for chucking. At this time, the tapered portion 31 is a tapered surface parallel to the major axis direction of the contact ellipse 30 between the track groove 22 of the outer joint member 23 and the ball 27, and can stably hold the outer joint member 23, which is a workpiece, The processing accuracy can be improved.

図５では、外側継手部材２３のトラック溝入口２２に組込む用のカット部５０を設けている。この場合も、外側継手部材２３のトラック溝２２とボール２７（図１参照）との接触楕円３０の長軸方向と平行なテーパ部３１が設けられている。また、外側継手部材２３の内径面開口端部にはストレート部３２が設けられ、このストレート部３２と、テーパ部３１とのコーナ部には面取部３３が設けられている。 In FIG. 5, a cut portion 50 to be incorporated into the track groove inlet 22 of the outer joint member 23 is provided. Also in this case, the taper portion 31 parallel to the major axis direction of the contact ellipse 30 between the track groove 22 of the outer joint member 23 and the ball 27 (see FIG. 1) is provided. A straight portion 32 is provided at the open end of the inner diameter surface of the outer joint member 23, and a chamfered portion 33 is provided at the corner between the straight portion 32 and the tapered portion 31.

ところで、前記実施形態では、外側継手部材２３のトラック溝２２は、第１のトラック溝部２２ａと第２のトラック溝部２２ｂとで構成される。このため、溝底が１個の円弧からなるトラック溝２２ｃと比べた場合、図７に示すように、第１のトラック溝部２２ａと第２のトラック溝部２２ｂを有するものが、トラック入口側において、微小寸法δだけ外径側へ位置することになる。このため、図１４と図１５に示すように最大作動角αを取った際に、微小寸Ｘだけトラック余裕量を形成することができ、ボール２７の落下を防止できる。 By the way, in the said embodiment, the track groove 22 of the outer joint member 23 is comprised by the 1st track groove part 22a and the 2nd track groove part 22b. For this reason, when compared with the track groove 22c having a single groove at the groove bottom, as shown in FIG. 7, a track groove having a first track groove portion 22a and a second track groove portion 22b is Only the minute dimension δ is located on the outer diameter side. For this reason, when the maximum operating angle α is obtained as shown in FIGS. 14 and 15, it is possible to form the track margin amount by the minute dimension X and prevent the ball 27 from dropping.

これに対して、溝底が１個の円弧からなるトラック溝２２ｃを有するものであれば、図１６と図１７に示すように、最大作動角αを取った際に、前記したようなトラック余裕量を形成することができず、ボール２７の落下を招くことになる。 On the other hand, if the groove bottom has the track groove 22c formed of one circular arc, as shown in FIGS. 16 and 17, when the maximum operating angle α is taken, the above-mentioned track margin is obtained. The amount cannot be formed, and the balls 27 are dropped.

前記実施形態では、外側継手部材２３のトラック溝２２の曲率中心Ｏ１と、内側継手部材２６のトラック溝２５の曲率中心Ｏ２と径方向にオフセットされることなく一致させている。これに対して、図１８では、外側継手部材２３のトラック溝２２の曲率中心Ｏ１を径方向にオフセットさせ、図１９では、内側継手部材２６のトラック溝２５の曲率中心Ｏ２を径方向にオフセットさせている。 In the above embodiment, the center O1 of curvature of the track groove 22 of the outer joint member 23 and the center O2 of curvature of the track groove 25 of the inner joint member 26 are aligned without being offset in the radial direction. On the other hand, in FIG. 18, the center of curvature O1 of the track groove 22 of the outer joint member 23 is radially offset, and in FIG. 19, the center of curvature O2 of the track groove 25 of the inner joint member 26 is radially offset. ing.

外側継手部材２３のトラック溝２２の溝深さを確保する場合は、図１８に示すように、負の方向に、内側継手部材２６のトラック溝２５の溝深さを確保する場合は、図１９に示すように、正の方向に径方向にオフセットさせることになる。なお、図１８と図１９において、Ｒ２はトラック中心を球面中心に対し径方向（半径方向）にＲｆだけオフセットさせた時のボール２７の中心軌跡を示している。 When securing the groove depth of the track groove 22 of the outer joint member 23, as shown in FIG. 18, when securing the groove depth of the track groove 25 of the inner joint member 26 in the negative direction, FIG. As shown in (3), the positive direction is offset in the radial direction. 18 and 19, R2 represents the center locus of the ball 27 when the track center is offset by Rf in the radial direction (radial direction) with respect to the spherical center.

このように径方向にオフセットさせることによって、トラック溝２２、２５の溝深さに変化を付けることができる。このため、トラック溝２２、２５からのボール２７の外れを防止できる構造としたり、外側継手部材２３及び内側継手部材２６の剛性向上等を図ることができる構造としたりできる。 By thus offsetting in the radial direction, the groove depth of the track grooves 22 and 25 can be changed. Therefore, the ball 27 can be prevented from coming off the track grooves 22 and 25, or the rigidity of the outer joint member 23 and the inner joint member 26 can be improved.

また、図１３（ａ）に示すケージ２８は、外球面の曲率中心と内球面の曲率中心とが一致したものであった。これに対して、図１３（ｂ）に示すケージ２８では、外球面２８ａの曲率中心Ｏ７と内球面２８ｂの曲率中心Ｏ８とは、継手中心Ｏに対して軸方向にオフセットしている。このように、図１３（ｂ）に示すケージ２８も本発明に係る等速自在継手に用いることができる。この図１３（ｂ）に示すようなケージ２８を用いる場合、外側継手部材２３の内径面の曲率中心と内側継手部材の外径面の曲率中心とを、継手中心Ｏに対して軸方向にオフセットさせる必要がある。 In the cage 28 shown in FIG. 13A, the center of curvature of the outer spherical surface and the center of curvature of the inner spherical surface coincided with each other. On the other hand, in the cage 28 shown in FIG. 13B, the center of curvature O7 of the outer spherical surface 28a and the center of curvature O8 of the inner spherical surface 28b are axially offset from the joint center O. As described above, the cage 28 shown in FIG. 13B can also be used in the constant velocity universal joint according to the present invention. When the cage 28 as shown in FIG. 13B is used, the center of curvature of the inner diameter surface of the outer joint member 23 and the center of curvature of the outer diameter surface of the inner joint member are axially offset with respect to the joint center O. Need to let.

このように、外球面２８ａの曲率中心Ｏ７と内球面２８ｂの曲率中心Ｏ８とを、継手中心Ｏに対して軸方向にオフセットさせることによって、ケージ２８の継手開口側の肉厚を厚く形成することができる。これによって、継手の小型軽量化を図るために、ケージ２８を薄く成形しても、ケージ２８の継手開口側の肉厚を、高作動角回転時に付与される負荷に耐え得る強度に確保することができる。 In this way, the center of curvature O7 of the outer spherical surface 28a and the center of curvature O8 of the inner spherical surface 28b are axially offset with respect to the joint center O, so that the cage 28 has a large wall thickness on the joint opening side. You can Thus, in order to reduce the size and weight of the joint, even if the cage 28 is thinly formed, the thickness of the cage 28 on the joint opening side should be ensured to be strong enough to withstand the load applied during rotation at a high operating angle. You can

以上、本発明の実施形態につき説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能であって、トラック溝２２、２５の傾斜角度γとしては、隣合うボールトラックに配置されるボール２７に作用する押出力が逆方向に作用し、この等速自在継手の作動を阻害しない範囲（４°〜１６°）で種々変更できる。また、径方向にオフセットさせる場合、径方向にオフセットさせない場合に比べて、曲率半径が大きくなるものであっても、小さくなるものであってもよい。第１のトラック溝部２２ａと第２のトラック溝部２２ｂとの繋部４０を規定する角度β、及び第１のトラック溝部２５ａと第２のトラック溝部２５ｂとの繋部４１を規定する角度βとしても任意に設定できる。なお、トルク伝達部材としてのボール数としては、６個や８個等であってもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. The inclination angles γ of the track grooves 22 and 25 are not limited to those of adjacent ball tracks. The pushing force acting on the arranged balls 27 acts in the opposite direction, and can be variously changed within a range (4° to 16°) that does not hinder the operation of this constant velocity universal joint. Further, in the case of offsetting in the radial direction, the radius of curvature may be larger or smaller than that in the case of not offsetting in the radial direction. The angle β that defines the connecting portion 40 between the first track groove portion 22a and the second track groove portion 22b and the angle β that defines the connecting portion 41 between the first track groove portion 25a and the second track groove portion 25b It can be set arbitrarily. The number of balls as the torque transmission member may be six, eight, or the like.

２１ 内球面
２２ トラック溝
２２ａ 第一のトラック溝部
２２ｂ 第二のトラック溝部
２３ 外側継手部材
２４ 外球面
２５ トラック溝
２５ａ 第一のトラック溝部
２５ｂ 第二のトラック溝部
２６ 内側継手部材
２７ ボール
２８ ケージ
２８ａ 外球面
２８ｂ 内球面
２８ｄ ケージ窓
３０ 接触楕円 21 inner spherical surface 22 track groove 22a first track groove portion 22b second track groove portion 23 outer joint member 24 outer spherical surface 25 track groove 25a first track groove portion 25b second track groove portion 26 inner joint member 27 ball 28 cage 28a outside Spherical surface 28b Inner spherical surface 28d Cage window 30 Contact ellipse

Claims (6)

内球面に複数個のトラック溝が形成された外側継手部材と、外球面に外側継手部材のトラック溝と対をなす複数個のトラック溝が形成された内側継手部材と、外側継手部材のトラック溝と内側継手部材のトラック溝との間に介在してトルクを伝達する複数個のボールと、外側継手部材の内球面と内側継手部材の外球面との間に介在してボールを保持するケージ窓を有するケージとを備えた固定式等速自在継手であって、
前記外側継手部材の開口端面部に、加工用チャックのテーパチャック面にて受けられるチャック部を設け、このチャック部が、外側継手部材のトラック溝とボールとの接触楕円の長軸方向と平行なテーパ部であることを特徴とする固定式等速自在継手。 An outer joint member having a plurality of track grooves formed on the inner spherical surface, an inner joint member having a plurality of track grooves paired with the track grooves of the outer joint member formed on the outer spherical surface, and a track groove of the outer joint member Cage balls for holding the balls interposed between the inner spherical surface of the outer joint member and the outer spherical surface of the inner joint member, and a plurality of balls interposed between the inner joint member and the track groove of the inner joint member for transmitting torque. A fixed type constant velocity universal joint including a cage having
A chuck portion that is received by the taper chuck surface of the processing chuck is provided on the opening end surface portion of the outer joint member, and the chuck portion is parallel to the major axis direction of the contact ellipse between the track groove of the outer joint member and the ball. Fixed type constant velocity universal joint characterized by a tapered portion. 外側継手部材のトラック溝の曲率中心と外側継手部材の内球面の曲率中心の軸方向のオフセットと、内側継手部材のトラック溝の曲率中心と内側継手部材の外球面の曲率中心の軸方向のオフセットとを０とし、外側継手部材のトラック溝及び内側継手部材のトラック溝をそれぞれ軸線に対して傾斜させるとともに、周方向に隣合うトラック溝の傾斜方向を相反させ、かつ外側継手部材のトラック溝とこれに対向する内側継手部材のトラック溝を軸線に対して反対方向に傾斜させたことを特徴とする請求項１に記載の固定式等速自在継手。 Axial offset between the center of curvature of the track groove of the outer joint member and the center of curvature of the inner spherical surface of the outer joint member, and axial offset of the center of curvature of the track groove of the inner joint member and the center of curvature of the outer spherical surface of the inner joint member. Is set to 0, the track groove of the outer joint member and the track groove of the inner joint member are respectively inclined with respect to the axis, the inclination directions of the track grooves adjacent to each other in the circumferential direction are made opposite to each other, and The fixed type constant velocity universal joint according to claim 1, wherein the track groove of the inner joint member facing this is inclined in the opposite direction with respect to the axis. 前記外側継手部材のトラック溝は奥側に位置する第１のトラック溝部と開口側に位置する第２のトラック溝部とからなることを特徴とする請求項１又は請求項２に記載の固定式等速自在継手。 3. The fixed type etc. according to claim 1 or 2, wherein the track groove of the outer joint member is composed of a first track groove part located on the inner side and a second track groove part located on the opening side. Quick universal joint. 第１のトラック溝部の溝底が円弧部とされ、第２のトラック溝部の溝底がストレート部とされ、前記ストレート部は、第１のトラック溝部と第２のトラック溝部との接続部での第１のトラック溝部の接線となることを特徴とする請求項３に記載の固定式等速自在継手。 The groove bottom of the first track groove portion is an arc portion, the groove bottom of the second track groove portion is a straight portion, and the straight portion is a connecting portion between the first track groove portion and the second track groove portion. The fixed type constant velocity universal joint according to claim 3, wherein the fixed track is a tangent line of the first track groove portion. 前記ケージの外球面の曲率中心とケージの内球面の曲率中心とは、継手中心に対して軸方向にオフセットしていることを特徴とする請求項１〜請求項４のいずれか１項に記載の固定式等速自在継手。 5. The center of curvature of the outer spherical surface of the cage and the center of curvature of the inner spherical surface of the cage are axially offset with respect to the joint center, according to any one of claims 1 to 4. Fixed type constant velocity universal joint. 外側継手部材のトラック溝の曲率中心と内側継手部材のトラック溝の曲率中心とは、継手中心に対して径方向にオフセットしていることを特徴とする請求項１〜請求項５のいずれか１項に記載の固定式等速自在継手。 The center of curvature of the track groove of the outer joint member and the center of curvature of the track groove of the inner joint member are offset in the radial direction with respect to the joint center. Fixed type constant velocity universal joint according to item.
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