WO2005078301A1 - Tripod-type constant velocity universal joint - Google Patents

Tripod-type constant velocity universal joint Download PDF

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Publication number
WO2005078301A1
WO2005078301A1 PCT/JP2004/019847 JP2004019847W WO2005078301A1 WO 2005078301 A1 WO2005078301 A1 WO 2005078301A1 JP 2004019847 W JP2004019847 W JP 2004019847W WO 2005078301 A1 WO2005078301 A1 WO 2005078301A1
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WO
WIPO (PCT)
Prior art keywords
tripod
constant velocity
universal joint
velocity universal
roller
Prior art date
Application number
PCT/JP2004/019847
Other languages
French (fr)
Japanese (ja)
Inventor
Tatsuro Sugiyama
Hironori Oguni
Original Assignee
Ntn Corporation
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Publication date
Application filed by Ntn Corporation filed Critical Ntn Corporation
Publication of WO2005078301A1 publication Critical patent/WO2005078301A1/en

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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
    • F16D2003/2026—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 trunnion rings, i.e. with tripod joints having rollers supported by a ring on the trunnion

Definitions

  • the present invention relates to a tripod type constant velocity universal joint.
  • the tripod type constant velocity universal joint is a constant velocity universal joint that is used in power transmission systems of automobiles and various industrial machines to connect the rotating shaft on the driving side and the rotating shaft on the driven side to transmit torque at a constant angular velocity.
  • it belongs to the sliding type constant velocity universal joint that allows angular displacement and axial displacement.
  • a constant velocity universal joint has been used to transmit the rotational force of a driving shaft to each axle via a driven shaft. As shown in Fig.
  • the tripod type constant velocity universal joint has an outer joint member 1 with three track grooves 1a extending in the inner peripheral surface in the axial direction, and three radially projecting legs.
  • a roller 3 having a tripod member 2 provided with a shaft 2a and having each leg 2a of the tripod member 2 rotatably supported via a rolling element in a track groove 1a of the outer joint member 1. By engaging, the torque is transmitted between the outer joint member 1 and the tri-board member 2.
  • the rolling element interposed between the leg shaft 2a and the roller 3 is almost a needle roller type, and rarely a ball type.
  • a main object of the present invention is to provide an inexpensive tripod type constant velocity universal joint.
  • the present invention provides an outer joint member in which three track grooves extending in the axial direction are formed on an inner periphery, and a pair of side walls opposing each track groove have a roller guide surface, and a radially projecting outer periphery.
  • a tripod member formed with three leg shafts; and a roller assembly rotatably supported on the leg shafts of the tripod member, and rolling the roller assembly along a roller guide surface of an outer joint member.
  • the roller assembly is formed by a single row deep groove ball bearing in which the inner diameter of the inner ring and the outer diameter of the outer ring are formed as cylindrical surfaces and both side surfaces of the inner and outer rings are formed as flat surfaces. It is characterized by comprising Inexpensive tripod-type constant velocity universal joints can be provided by using ball bearings widely distributed in the world, particularly inexpensive single row deep groove ball bearings.
  • the roller guide surface of the outer joint member may be constituted by a flat surface on which the outer ring of the single row deep groove ball bearing rolls and a brim surface holding both side surfaces of the outer ring, and the outer peripheral surface of the leg shaft may be spherical. .
  • the roller guide surface of the outer joint member may be a partial cylindrical surface having a convex arc toward the track groove, and the outer peripheral surface of the leg shaft may be a cylindrical surface.
  • the other two leg shafts 24 are inclined as compared with the case where the operating angle is 0 degree indicated by the two-dot chain line.
  • the inclination of the leg axis 24 caused by the intersection of the axis of the leg axis 24 swings means this.
  • the roller guide surface of the outer joint member may have a flat surface without a brim, and the outer peripheral surface of the leg shaft may have a drum shape.
  • FIG. 1 is a cross-sectional view of a tri-board type constant velocity universal joint according to an embodiment of the present invention.
  • FIG. 2A is a longitudinal sectional view of the joint of FIG. 1
  • FIG. 2B is a schematic side view of the tripod member in FIG. 2A.
  • Figure 3 is a cross-sectional view of the roller assembly (single row deep groove ball bearing).
  • FIG. 4 is a cross-sectional view of a tri-board type constant velocity universal joint according to another embodiment.
  • FIG. 5 is a cross-sectional view of a tripod type constant velocity universal joint showing still another embodiment.
  • FIG. 6 is a cross-sectional view of a tripod type constant velocity universal joint according to still another embodiment.
  • FIG. 7 is a cross-sectional view of a tripod type constant velocity universal joint according to still another embodiment.
  • FIG. 8 is a cross-sectional view of a tripod type constant velocity universal joint showing still another embodiment.
  • FIG. 9 is a cross-sectional view of a tripod type constant velocity universal joint showing a conventional technique.
  • BEST MODE FOR CARRYING OUT THE INVENTION the tripod constant velocity universal joint has an outer joint member 10, a tripod member 20 and a roller assembly 30 as main components.
  • the outer joint member 10 has a cup shape opened at one end, and is connected to a drive shaft or a driven shaft by a serration shaft of a shaft portion 16 protruding from the bottom side.
  • a track groove 12 extending in the axial direction is formed at a position equally divided in the circumferential direction.
  • each track groove 12 provides a roller guide surface 14.
  • the roller guide surface 14 is a flat surface parallel to the axis of the outer joint member 10.
  • the tripod member 20 includes a boss portion 22 and a leg shaft 24 protruding in a radial direction from a position at which the boss portion 22 is equally divided in the circumferential direction.
  • the boss portion 22 has a serration hole 26 for coupling with a driven shaft or a drive shaft.
  • the leg axis 24 has a spherical shape with the center of curvature on its axis.
  • the roller assembly 30 is located on the outer periphery of the leg shaft 24.
  • the roller assembly 30 is formed of a single-row deep groove ball bearing having a cylindrical inner and outer diameter.
  • the inner ring 32, the outer ring 34, the ball 36, and the retainer 38 are components of the roller assembly 30.
  • the inner diameter of the inner ring 32 and the outer diameter of the outer ring 34 are cylindrical surfaces, and both side surfaces of the inner and outer rings 32, 34 (the upper and lower surfaces of the inner and outer rings in FIG. 3) are formed as flat surfaces.
  • Outer ring 3 4 Is adapted to roll on the roller guide surface 14 of the outer joint member 10.
  • FIG. 1 shows the outer ring 34 in contact with the left and right roller guide surfaces 14, strictly speaking, depending on the rotational direction of the joint, the outer ring 34 contacts one of the pair of roller guide surfaces 14. Will be done.
  • a brim surface 18 is provided on both sides (upper and lower sides of the drawing) of the roller guide surface 14 to hold the outer ring 34.
  • the embodiment shown in FIG. 4 is different from the above-described embodiment of FIG. 1 in that the roller guide surface 14 is flat, but a convex arc toward the track groove 12 is formed. It is a cylindrical surface.
  • the roller guide surface 14 is inclined, and the surface 18 is provided only in the opening direction.
  • the reference numeral 0 indicates the inclination angle of the roller guide surface 14 with respect to the center of the track groove 12.
  • the outer joint member 10 is extended radially outside (upper side in the figure) of the flange surface 18 to extend the inner ring 32 of the roller assembly (single row deep groove ball bearing) 30. It is held by the brim surface 18 to the side surface.
  • the roller guide surface 14 of the outer joint member 10 is a partial cylindrical surface forming a convex arc toward the track groove 12 side, and the outer peripheral surface of the leg shaft 24 is a cylindrical surface. Things.
  • An inner ring 32 of a roller assembly (single-row deep groove ball bearing) 30 is fitted on the outer peripheral surface of the leg shaft 24, and a retaining ring 28 for regulating the axial movement of the leg shaft 24 is provided.
  • the inclination of the leg shaft 24 caused by the intersection of the axis of the leg shaft 24 swings is absorbed by the roller guide surface 14.
  • the roller guide surface 14 of the outer joint member 10 has no brim.
  • the outer surface of the leg shaft 24 should be flat and drum-shaped to absorb the inclination of the leg shaft 24 due to the intersection of the axis of the leg shaft 24.
  • the roller assembly is attached to the leg shaft 24. (Single-row deep groove ball bearing)
  • the inner ring 32 of 30 is fitted, and a retaining ring for restricting the axial movement of the leg shaft 24 is provided.
  • the inclination of the leg shaft 24 caused by the intersection of the axis of the leg shaft 24 swings is absorbed by the fitting portion between the leg shaft 24 and the inner ring 32.

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

Abstract

A tripod-type constant velocity universal joint having an outside coupling member (10) where three track grooves (12) extending in the axial direction are formed in the inner periphery and where a pair of opposite side walls of each track groove (12) functions as roller guiding surfaces (14), a tripod member (20) where radially projecting three leg shafts (24) are formed on the outer periphery, and roller assemblies (30) rotatably supported by the leg shafts (24) of the tripod member (20), wherein the roller assemblies (30) are arranged so as to roll along the roller guiding surfaces (14) of the outside coupling member (10). A single row deep groove ball bearing is used as a roller assembly (30), the single row deep groove ball bearing is a bearing where the inner diameter of an inner ring (32) and the outer diameter of an outer ring (34) have cylindrical surfaces and both side surfaces of the inner and outer rings are formed in flat.

Description

明細書 トリボード型等速自在継手 技術分野 この発明はトリポード型等速自在継手に関する。 卜リポード型等速自在継手は、 自動車や各種産業機械の動力伝達系において、 駆動側の回転軸と従動側の回転軸 を連結して等角速度でトルクを伝達するために用いられる等速自在継手のうち、 角度変位と軸方向変位を許容する摺動式等速自在継手に属する。 背景技術 従来、 自動車の駆動力伝達部では、 駆動軸の回転力を従動軸を介して各車軸へ と伝達させるため、 等速自在継手が用いられている。 そのうちのトリポード型等 速自在継手は、 図 9に示すように、 内周面に軸方向に延びた三つのトラック溝 1 aをもった外側継手部材 1と、 半径方向に突出した三本の脚軸 2 aを備えたトリ ポード部材 2とを有し、 トリポード部材 2の各脚軸 2 aに転動体を介して回転自 在に支持させたローラ 3を外側継手部材 1のトラック溝 1 aに係合させることに よリ、 外側継手部材 1と卜リボード部材 2との間でトルクを伝達する： ^造となつ ている。 脚軸 2 aとローラ 3との間に介在させる転動体はほとんど針状ころの総 ころタイプで、 稀にボールのものがある。 また、 ローラ 3の具体的構成や転動体 の配置等についてはさまざまなタイプのものが考案され、 要求性能に合わせて使 い分けられている （特開 2 0 0 0 - 2 2 7 1 2 4号公報参照） 。 上述のとおり、 脚軸と外側継手部材のトラック溝の間にはさまざまなタイプの ローラや転動体が考案され、 要求性能に合わせて使い分けられているが、 高性能 になるほど部品点数も多く形状も複雑でコス卜アップになっている。 最も一般的 なトリボード型等速自在継手においてもローラ、 ころ、 ヮッシャ、 止め輪など多 <の部品で構成され、 組み立ても特殊であるため低価格化が困難となっている。 本発明の主要な目的は、 安価なトリポード型等速自在継手を提供することであ る。 発明の開示 本発明は、 内周に軸方向に延びる三本のトラック溝を形成し、 各トラック溝の 向かい合った一対の側壁をローラ案内面とした外側継手部材と、 外周に半径方向 に突出した三本の脚軸を形成した卜リポード部材と、 卜リポード部材の脚軸に回 転自在に支持されたローラアセンブリとを具備し、 前記ローラアセンブリを外側 継手部材のローラ案内面に沿って転動させるようにした卜リポード型等速自在継 手において、 内輪の内径と外輪の外径が円筒面で内外輪の両側面が平坦な面で形 成されている単列深溝玉軸受によって前記ローラアセンブリを構成させたことを 特徴とするものである。 世間一般に数多く流通している玉軸受、 特に安価な単列 深溝玉軸受を利用することにより、 安価なトリポード型等速自在継手を提供する ことができる。 外側継手部材のローラ案内面を、 前記単列深溝玉軸受の外輪が転動する平坦面 と、 前記外輪の両側面を保持するつば面とで構成し、 脚軸の外周面を球面として もよい。 このような構成とすることにより、 ローラアセンブリが外側継手部材に 対して常に軸方向にのみ転がるため、 転がり抵抗が少なく、 低振動となる。 外側継手部材のローラ案内面をトラック溝に向かって凸円弧となった部分円筒 面とし、 脚軸の外周面を円筒面としてもよい。 このような構成を採用することに よリ、 脚軸の軸心の交点が振れ回ることによる脚軸の傾きをローラ案内面にて吸 収することができる。 ここで、 脚軸の軸心の交点が振れ回ることによる脚軸の傾きについて説明する ならば次のとおりである。 図 2 Aおよび 2 Bに示すように継手が作動角をとつた 場合、 つまり、 外側継手部材 1 0とトリポード部材 2 0とが折れ曲がった場合、 トリポード部材 2 0の三本の脚軸 2 4のうちの一本が時計 0時の位置にあり、 他 の二本がそれぞれ時計の 4時と 8時の位置にある状態を考えると、 三本の脚軸 2 4の軸心の交点が外側継手部材 1 0の軸心 Oに対してずれ、 トルクの伝達時には、 そのずれ分を半径として軸心 Oのまわりを脚軸 2 4の軸心の交点 O 'が振れ回ろ うとするため、 図 2 Bの上側の脚軸 2 4を基本として考えると、 他の二本の脚軸 2 4は、 二点鎖線で示す作動角 0度の場合に比較して傾きを生じる。 脚軸 2 4の 軸心、の交点が振れ回ることによる脚軸 2 4の傾きとはこのことを意味する。 外側継手部材のローラ案内面をつば面のない平坦面とし、 脚軸の外周面を太鼓 状としてもよい。 このような構成を採用することにより、 脚軸の軸心の交点が振 れ回ることによる脚軸の傾きを脚軸と内輪との嵌合部分で吸収することができる。 大量生産されている単列深溝玉軸受を利用することにより、 単列深溝玉軸受の 製作に用いられる現有加工機および組み立て機がそのまま使えるため、 非常に精 度の高い、 それでいて低コストな中間部材となり、 これを使ったトリボード型等 速自在継手は、 組み立ても容易で低コストなものとなる。 単列深溝玉軸受は非常 に精度が高く、 転がり抵抗も少なくなつていることより、 トリボード型等速自在 継手の作動性を向上させることができる。 図面の簡単な説明 図 1は本発明の実施の形態を示す卜リボード型等速自在継手の横断面図である。 図 2 Aは図 1の継手の縦断面図、 図 2 Bは図 2 Aにおけるトリポード部材の模 式的側面図である。 TECHNICAL FIELD The present invention relates to a tripod type constant velocity universal joint. The tripod type constant velocity universal joint is a constant velocity universal joint that is used in power transmission systems of automobiles and various industrial machines to connect the rotating shaft on the driving side and the rotating shaft on the driven side to transmit torque at a constant angular velocity. Among them, it belongs to the sliding type constant velocity universal joint that allows angular displacement and axial displacement. BACKGROUND ART Conventionally, in a driving force transmission unit of an automobile, a constant velocity universal joint has been used to transmit the rotational force of a driving shaft to each axle via a driven shaft. As shown in Fig. 9, the tripod type constant velocity universal joint has an outer joint member 1 with three track grooves 1a extending in the inner peripheral surface in the axial direction, and three radially projecting legs. A roller 3 having a tripod member 2 provided with a shaft 2a and having each leg 2a of the tripod member 2 rotatably supported via a rolling element in a track groove 1a of the outer joint member 1. By engaging, the torque is transmitted between the outer joint member 1 and the tri-board member 2. The rolling element interposed between the leg shaft 2a and the roller 3 is almost a needle roller type, and rarely a ball type. In addition, various types of the specific configuration of the roller 3 and the arrangement of the rolling elements, etc., have been devised, and used in accordance with the required performance (Japanese Unexamined Patent Application Publication No. 2000-227271). No.). As described above, various types of rollers and rolling elements have been devised between the axle and the track groove of the outer joint member, and they are used properly according to the required performance.However, the higher the performance, the more the number of parts and the shape It's complicated and costly. Even the most common tri-board type constant velocity universal joint is composed of many parts such as rollers, rollers, washers, retaining rings, etc., and the special assembling makes it difficult to reduce the price. A main object of the present invention is to provide an inexpensive tripod type constant velocity universal joint. DISCLOSURE OF THE INVENTION The present invention provides an outer joint member in which three track grooves extending in the axial direction are formed on an inner periphery, and a pair of side walls opposing each track groove have a roller guide surface, and a radially projecting outer periphery. A tripod member formed with three leg shafts; and a roller assembly rotatably supported on the leg shafts of the tripod member, and rolling the roller assembly along a roller guide surface of an outer joint member. The roller assembly is formed by a single row deep groove ball bearing in which the inner diameter of the inner ring and the outer diameter of the outer ring are formed as cylindrical surfaces and both side surfaces of the inner and outer rings are formed as flat surfaces. It is characterized by comprising Inexpensive tripod-type constant velocity universal joints can be provided by using ball bearings widely distributed in the world, particularly inexpensive single row deep groove ball bearings. The roller guide surface of the outer joint member may be constituted by a flat surface on which the outer ring of the single row deep groove ball bearing rolls and a brim surface holding both side surfaces of the outer ring, and the outer peripheral surface of the leg shaft may be spherical. . With such a configuration, since the roller assembly always rolls only in the axial direction with respect to the outer joint member, the rolling resistance is low and the vibration is low. The roller guide surface of the outer joint member may be a partial cylindrical surface having a convex arc toward the track groove, and the outer peripheral surface of the leg shaft may be a cylindrical surface. By adopting such a configuration, the inclination of the leg shaft caused by the intersection of the axis of the leg shaft swings can be absorbed by the roller guide surface. Here, the inclination of the leg axis caused by the intersection of the axis of the leg axis swinging will be described as follows. As shown in FIGS. 2A and 2B, when the joint takes an operating angle, that is, when the outer joint member 10 and the tripod member 20 are bent, the three leg shafts 24 of the tripod member 20 are bent. One of them is at 0 o'clock and the other Considering the state in which the two are located at 4 o'clock and 8 o'clock, respectively, the intersection of the axes of the three leg shafts 24 is shifted with respect to the axis O of the outer joint member 10, and the torque At the time of transmission, the intersection O 'of the axis of the leg axis 24 tends to swing around the axis O with the deviation as the radius, so considering the upper axis 24 of FIG. The other two leg shafts 24 are inclined as compared with the case where the operating angle is 0 degree indicated by the two-dot chain line. The inclination of the leg axis 24 caused by the intersection of the axis of the leg axis 24 swings means this. The roller guide surface of the outer joint member may have a flat surface without a brim, and the outer peripheral surface of the leg shaft may have a drum shape. By adopting such a configuration, the inclination of the leg axle caused by the intersection of the axis of the leg axle swings can be absorbed by the fitting portion between the leg axle and the inner ring. By using mass-produced single-row deep groove ball bearings, the existing processing machines and assembling machines used in the production of single-row deep groove ball bearings can be used as they are, resulting in extremely high-precision yet low-cost intermediate members. The tri-board type constant velocity universal joint using this is easy to assemble and low in cost. Single-row deep groove ball bearings have extremely high accuracy and low rolling resistance, so that the operability of the tri-board type constant velocity universal joint can be improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a tri-board type constant velocity universal joint according to an embodiment of the present invention. FIG. 2A is a longitudinal sectional view of the joint of FIG. 1, and FIG. 2B is a schematic side view of the tripod member in FIG. 2A.
図 3はローラアセンブリ （単列深溝玉軸受） の断面図である。  Figure 3 is a cross-sectional view of the roller assembly (single row deep groove ball bearing).
図 4は別の実施の形態を示すトリボード型等速自在継手の横断面図である。 図 5はさらに別の実施の形態を示すトリポード型等速自在継手の横断面図であ る。  FIG. 4 is a cross-sectional view of a tri-board type constant velocity universal joint according to another embodiment. FIG. 5 is a cross-sectional view of a tripod type constant velocity universal joint showing still another embodiment.
図 6はさらに別の実施の形態を示すトリポード型等速自在継手の横断面図であ る。  FIG. 6 is a cross-sectional view of a tripod type constant velocity universal joint according to still another embodiment.
図 7はさらに別の実施の形態を示す卜リポード型等速自在継手の横断面図であ る。 FIG. 7 is a cross-sectional view of a tripod type constant velocity universal joint according to still another embodiment. The
図 8はさらに別の実施の形態を示すトリポード型等速自在継手の横断面図であ る。  FIG. 8 is a cross-sectional view of a tripod type constant velocity universal joint showing still another embodiment.
図 9は従来の技術を示すトリポード型等速自在継手の横断面図である。 発明を実施する最良の形態 以下、 図面に従って本発明の実施の形態を説明する。 図 1、 図 2 Aおよび 2 B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 1 0とトリポード部材 2 0とローラアセンブリ 3 0を主要な構成要素として いる。 外側継手部材 1 0は一端にて開口したカップ状で、 底部側から突出した軸部 1 6のセレーシヨン軸にて駆動軸または従動軸と結合するようになっている。 外側 継手部材 1 0の内周には円周方向三等分位置に軸方向に延びるトラック溝 1 2が 形成してある。 各トラック溝 1 2の、 円周方向に向かい合った一対の側壁がロー ラ案内面 1 4を提供する。 ローラ案内面 1 4はここでは外側継手部材 1 0の軸線 と平行な平坦面である。 トリポード部材 2 0は、 ボス部 2 2と、 ボス部 2 2の円周方向三等分位置から 半径方向に突出した脚軸 2 4とからなる。 ボス部 2 2には従動軸または駆動軸と 結合するためのセレーシヨン孔 2 6が形成してある。 脚軸 2 4はここではその軸 線上に曲率中心をもった球状を呈している。 脚軸 2 4の外周にローラアセンブリ 3 0が位置する。 ローラアセンブリ 3 0は 内外径共に円筒面の単列深溝玉軸受で構成されている。 すなわち、 図 3に示すよ うに、 内輪 3 2と外輪 3 4と玉 3 6と保持器 3 8がローラアセンブリ 3 0の構成 要素である。 内輪 3 2の内径と外輪 3 4の外径は円筒面で、 内外輪 3 2， 3 4の 両側面 （図 3における内外輪の上下面） は平坦な面で形成されている。 外輪 3 4 は外側継手部材 1 0のローラ案内面 1 4を転動するようになっている。 なお、 図 1では外輪 3 4が左右のローラ案内面 1 4と接しているように図示してあるが、 厳密には、 継手の回転方向によって一対のローラ案内面 1 4のいずれか一方と接 することとなる。 また、 この実施の形態では、 ローラ案内面 1 4の両側 （図の上 下） につば面 1 8が設けてあり、 外輪 3 4を保持するようになっている。 次に、 図 4に示す実施の形態は、 上に述べた図 1の実施の形態ではローラ案内 面 1 4が平坦であつたのを、 トラック溝 1 2側に向かって凸円弧となった部分円 筒面としたものである。 図 5に示す実施の形態は、 ローラ案内面 1 4を傾斜させ、 開いた方向にのみつ ば面 1 8を設けたものである。 トラック溝 1 2の中心に対してローラ案内面 1 4 の傾斜角を符号 0で表してある。 この場合、 傾斜角により、 負荷方向の片側つば 面のみの接触抵抗が発生し、 非負荷側の抵抗がないため、 低振動となる。 図 6に示す実施の形態は、 外側継手部材 1 0の半径方向外側 （図の上側） のつ ば面 1 8を延長して、 ローラアセンブリ （単列深溝玉軸受） 3 0の内輪 3 2の側 面までつば面 1 8で保持したものである。 脚軸 2 4と内輪 3 2から伝わるカをボ ール 3 6のみで受けるのではなく、 内輪 3 2から外側継手部材 1 0にも伝えるこ とにより、 玉軸受にかかるアキシアル方向の力を軽減して軸受強度を上げること ができる。 図 7に示す実施の形態は、 外側継手部材 1 0のローラ案内面 1 4をトラック溝 1 2側に向かって凸円弧をなす部分円筒面とし、 脚軸 2 4の外周面を円筒面とし たものである。 脚軸 2 4の外周面にローラアセンブリ （単列深溝玉軸受） 3 0の 内輪 3 2を嵌合させ、 脚軸 2 4の軸方向の移動を規制する止め輪 2 8を設けてあ る。 この実施の形態の場合、 脚軸 2 4の軸心の交点が振れ回ることによる脚軸 2 4の傾きをローラ案内面 1 4にて吸収する。 図 8に示す実施の形態は、 外側継手部材 1 0のローラ案内面 1 4はつばのない 平坦面とし、 脚軸 2 4の外周面は、 脚軸 2 4の軸心の交点が振れ回ることによる 脚軸 2 4の傾きを吸収できるような太鼓状とし、 その脚軸 2 4にローラァセンブ リ （単列深溝玉軸受） 3 0の内輪 3 2を嵌合させ、 脚軸 2 4の軸方向の移動を規 制する止め輪を設けてある。 この実施の形態の場合、 脚軸 2 4の軸心の交点が振 れ回ることによる脚軸 2 4の傾きを脚軸 2 4と内輪 3 2との嵌合部分で吸収する。 FIG. 9 is a cross-sectional view of a tripod type constant velocity universal joint showing a conventional technique. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1, 2A and 2B, the tripod constant velocity universal joint has an outer joint member 10, a tripod member 20 and a roller assembly 30 as main components. The outer joint member 10 has a cup shape opened at one end, and is connected to a drive shaft or a driven shaft by a serration shaft of a shaft portion 16 protruding from the bottom side. On the inner periphery of the outer joint member 10, a track groove 12 extending in the axial direction is formed at a position equally divided in the circumferential direction. A pair of circumferentially opposed side walls of each track groove 12 provide a roller guide surface 14. Here, the roller guide surface 14 is a flat surface parallel to the axis of the outer joint member 10. The tripod member 20 includes a boss portion 22 and a leg shaft 24 protruding in a radial direction from a position at which the boss portion 22 is equally divided in the circumferential direction. The boss portion 22 has a serration hole 26 for coupling with a driven shaft or a drive shaft. Here, the leg axis 24 has a spherical shape with the center of curvature on its axis. The roller assembly 30 is located on the outer periphery of the leg shaft 24. The roller assembly 30 is formed of a single-row deep groove ball bearing having a cylindrical inner and outer diameter. That is, as shown in FIG. 3, the inner ring 32, the outer ring 34, the ball 36, and the retainer 38 are components of the roller assembly 30. The inner diameter of the inner ring 32 and the outer diameter of the outer ring 34 are cylindrical surfaces, and both side surfaces of the inner and outer rings 32, 34 (the upper and lower surfaces of the inner and outer rings in FIG. 3) are formed as flat surfaces. Outer ring 3 4 Is adapted to roll on the roller guide surface 14 of the outer joint member 10. Although FIG. 1 shows the outer ring 34 in contact with the left and right roller guide surfaces 14, strictly speaking, depending on the rotational direction of the joint, the outer ring 34 contacts one of the pair of roller guide surfaces 14. Will be done. Further, in this embodiment, a brim surface 18 is provided on both sides (upper and lower sides of the drawing) of the roller guide surface 14 to hold the outer ring 34. Next, the embodiment shown in FIG. 4 is different from the above-described embodiment of FIG. 1 in that the roller guide surface 14 is flat, but a convex arc toward the track groove 12 is formed. It is a cylindrical surface. In the embodiment shown in FIG. 5, the roller guide surface 14 is inclined, and the surface 18 is provided only in the opening direction. The reference numeral 0 indicates the inclination angle of the roller guide surface 14 with respect to the center of the track groove 12. In this case, due to the inclination angle, contact resistance occurs on only one side of the flange in the load direction, and there is no resistance on the non-load side, resulting in low vibration. In the embodiment shown in FIG. 6, the outer joint member 10 is extended radially outside (upper side in the figure) of the flange surface 18 to extend the inner ring 32 of the roller assembly (single row deep groove ball bearing) 30. It is held by the brim surface 18 to the side surface. By transmitting the power transmitted from the leg shaft 24 and the inner ring 32 to the outer joint member 10 from the inner ring 32 instead of receiving it only with the ball 36, the axial force applied to the ball bearing is reduced. As a result, the bearing strength can be increased. In the embodiment shown in FIG. 7, the roller guide surface 14 of the outer joint member 10 is a partial cylindrical surface forming a convex arc toward the track groove 12 side, and the outer peripheral surface of the leg shaft 24 is a cylindrical surface. Things. An inner ring 32 of a roller assembly (single-row deep groove ball bearing) 30 is fitted on the outer peripheral surface of the leg shaft 24, and a retaining ring 28 for regulating the axial movement of the leg shaft 24 is provided. In the case of this embodiment, the inclination of the leg shaft 24 caused by the intersection of the axis of the leg shaft 24 swings is absorbed by the roller guide surface 14. In the embodiment shown in FIG. 8, the roller guide surface 14 of the outer joint member 10 has no brim. The outer surface of the leg shaft 24 should be flat and drum-shaped to absorb the inclination of the leg shaft 24 due to the intersection of the axis of the leg shaft 24. The roller assembly is attached to the leg shaft 24. (Single-row deep groove ball bearing) The inner ring 32 of 30 is fitted, and a retaining ring for restricting the axial movement of the leg shaft 24 is provided. In the case of this embodiment, the inclination of the leg shaft 24 caused by the intersection of the axis of the leg shaft 24 swings is absorbed by the fitting portion between the leg shaft 24 and the inner ring 32.

Claims

請求の範囲 The scope of the claims
1 . 内周に軸方向に延びる三本のトラック溝を形成し、 各トラック溝の向かい 合った一対の側壁をローラ案内面とした外側継手部材と、 外周に半径方向に突出 した三本の脚軸を形成した卜リポード部材と、 卜リポード部材の脚軸に回転自在 に支持されたローラアセンブリとを具備し、 前記ローラアセンブリを外側継手部 材のローラ案内面に沿って転動させるようにしたトリボード型等速自在継手にお いて、 内輪の内径と外輪の外径が円筒面で内外輪の両側面が平坦な面で形成され ている単列深溝玉軸受によって前記ローラアセンブリを構成させたことを特徴と するトリポード型等速自在継手。 1. An outer joint member with three track grooves formed in the inner circumference extending in the axial direction, and a pair of side walls facing each track groove as roller guide surfaces, and three legs protruding radially on the outer circumference. A tripod member having a shaft formed thereon, and a roller assembly rotatably supported by a leg shaft of the tripod member, wherein the roller assembly is rolled along the roller guide surface of the outer joint member. In the tri-board type constant velocity universal joint, the roller assembly is constituted by a single-row deep groove ball bearing in which the inner diameter of the inner ring and the outer diameter of the outer ring are cylindrical surfaces and both side surfaces of the inner and outer rings are flat surfaces. A tripod type constant velocity universal joint characterized by the following characteristics.
2 . 外側継手部材のローラ案内面を、 前記深溝玉軸受の外輪が転動する平坦面 と、 前記外輪の両側面を保持するつば面とで構成し、 脚軸の外周面を球面とした ことを特徴とする請求項 1のトリポード型等速自在継手。 2. The roller guide surface of the outer joint member is constituted by a flat surface on which the outer ring of the deep groove ball bearing rolls and a brim surface holding both side surfaces of the outer ring, and the outer peripheral surface of the leg shaft is spherical. 3. The tripod type constant velocity universal joint according to claim 1, wherein:
3 . 外側継手部材のローラ案内面を卜ラック溝に向かって凸円弧となった部分 円筒面とし、 脚軸の外周面を円筒面としたことを特徴とする請求項 1のトリポー ド型等速自在継手。 3. The tripod constant velocity according to claim 1, wherein the roller guide surface of the outer joint member is a cylindrical surface having a convex arc toward the track groove, and the outer peripheral surface of the leg shaft is a cylindrical surface. Universal joint.
4. 外側継手部材のローラ案内面をつば面のない平坦面とし、 脚軸の外周面を 太鼓状としたことを特徴とする請求項 1のトリポード型等速自在継手。 4. The tripod constant velocity universal joint according to claim 1, wherein the roller guide surface of the outer joint member has a flat surface without a flange surface, and the outer peripheral surface of the leg shaft has a drum shape.
PCT/JP2004/019847 2004-02-13 2004-12-28 Tripod-type constant velocity universal joint WO2005078301A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007079763A1 (en) * 2005-12-29 2007-07-19 Gkn Driveline International Gmbh Tripod constant velocity joint with fully filled ball bearing

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JPS54132046A (en) * 1978-04-05 1979-10-13 Honda Motor Co Ltd Slide type uniform velocity universal joint
JPH03172622A (en) * 1989-11-03 1991-07-26 Loehr & Bromkamp Gmbh Tripod type joint
JPH03119617U (en) * 1990-03-23 1991-12-10
JPH0484923U (en) * 1990-11-30 1992-07-23
JPH04505204A (en) * 1988-11-26 1992-09-10 ハーディ　スパイサー　リミテッド Constant speed ratio universal joint
DE4240144C1 (en) * 1992-11-28 1994-02-17 Gkn Automotive Ag Constant velocity universal joint - has deep-groove ball bearing between inner and outer rollers on each spider arm
JP2000346088A (en) * 1999-06-07 2000-12-12 Ntn Corp Tripod type uniform velocity universal joint
JP2001234941A (en) * 2000-02-22 2001-08-31 Ntn Corp Constant velocity universal joint

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132046A (en) * 1978-04-05 1979-10-13 Honda Motor Co Ltd Slide type uniform velocity universal joint
JPH04505204A (en) * 1988-11-26 1992-09-10 ハーディ　スパイサー　リミテッド Constant speed ratio universal joint
JPH03172622A (en) * 1989-11-03 1991-07-26 Loehr & Bromkamp Gmbh Tripod type joint
JPH03119617U (en) * 1990-03-23 1991-12-10
JPH0484923U (en) * 1990-11-30 1992-07-23
DE4240144C1 (en) * 1992-11-28 1994-02-17 Gkn Automotive Ag Constant velocity universal joint - has deep-groove ball bearing between inner and outer rollers on each spider arm
JP2000346088A (en) * 1999-06-07 2000-12-12 Ntn Corp Tripod type uniform velocity universal joint
JP2001234941A (en) * 2000-02-22 2001-08-31 Ntn Corp Constant velocity universal joint

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007079763A1 (en) * 2005-12-29 2007-07-19 Gkn Driveline International Gmbh Tripod constant velocity joint with fully filled ball bearing

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