WO2011142375A1 - Sliding-type constant-velocity universal joint - Google Patents

Sliding-type constant-velocity universal joint Download PDF

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Publication number
WO2011142375A1
WO2011142375A1 PCT/JP2011/060816 JP2011060816W WO2011142375A1 WO 2011142375 A1 WO2011142375 A1 WO 2011142375A1 JP 2011060816 W JP2011060816 W JP 2011060816W WO 2011142375 A1 WO2011142375 A1 WO 2011142375A1
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WIPO (PCT)
Prior art keywords
joint member
velocity universal
constant velocity
type constant
universal joint
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PCT/JP2011/060816
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French (fr)
Japanese (ja)
Inventor
真 友上
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Ntn株式会社
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Publication of WO2011142375A1 publication Critical patent/WO2011142375A1/en

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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
    • F16D3/226—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 cylinder co-axial with the respective coupling part
    • F16D3/227—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 cylinder co-axial with the respective coupling part the joints being telescopic
    • 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
    • F16D2003/22309—Details of grooves

Definitions

  • the present invention relates to a sliding type constant velocity universal joint applied to a drive shaft or the like used for a light vehicle, a smaller vehicle, or a special vehicle for leisure and agriculture.
  • Constant velocity universal joints are roughly classified into fixed type constant velocity universal joints and sliding type constant velocity universal joints.
  • the fixed type constant velocity universal joint allows only angular displacement and is used on the wheel side of the drive shaft.
  • the sliding type constant velocity universal joint allows angular displacement and axial displacement, and is used on the differential side of the drive shaft.
  • the double offset type constant velocity universal joint includes an outer joint member 3 in which a plurality of track grooves 2 extending in the axial direction are formed on a cylindrical inner peripheral surface 1, and a spherical outer peripheral surface 4. And an inner joint member 6 formed with a plurality of track grooves 5 extending in the axial direction, and a torque transmission ball 7 interposed between the outer joint member 3 and the inner joint member 6 for transmitting torque.
  • the torque transmission ball 7 is held in the pocket 8 of the cage 9.
  • the center of curvature O1 of the spherical outer peripheral surface 9a of the cage 9 and the center of curvature O2 of the spherical inner peripheral surface 9b are offset by an equal distance in the opposite directions in the axial direction across the joint center O.
  • a ring body (round retaining ring) 10 is attached to the inner peripheral surface opening end of the outer joint member 3 as a joint preventing part S (inner joint member 6, cage 9, ball 7, etc.). Yes.
  • the outer joint member in the double offset type constant velocity universal joint shown in FIG. 7 and FIG. 8 is generally provided with the outer diameter surface, the inner diameter surface and the track groove simultaneously by hot forging and cold forging. Molding. For this reason, the apparatus (forging apparatus) for shaping
  • the object of the present invention is to propose a sliding type constant velocity universal joint that is excellent in productivity and can achieve cost reduction of a molding apparatus.
  • a first sliding type constant velocity universal joint of the present invention includes an outer joint member having a track groove formed on an inner diameter surface, an inner joint member having a track groove formed on an outer diameter surface, and a track groove of the outer joint member.
  • a constant velocity universal joint comprising a torque transmission ball disposed in a torque transmission ball track formed by cooperation with a track groove of an inner joint member corresponding to the above, and a cage for holding the torque transmission ball.
  • the inner diameter of the cage holding portion of the outer joint member is set to be larger than the diameter of a circle inscribed in a tangent line connected on the joint outer diameter side of adjacent balls along the circumferential direction. It is constituted by an arc of a track groove of the joint member, an inner surface of the cage holding portion, and a tangent line connecting the arc and the inner surface of the cage holding portion.
  • a second sliding type constant velocity universal joint includes an outer joint member having a track groove formed on the inner diameter surface, an inner joint member having a track groove formed on the outer diameter surface, and a track groove of the outer joint member.
  • a constant velocity universal joint comprising a torque transmission ball disposed in a torque transmission ball track formed by cooperation with a track groove of an inner joint member corresponding to the above, and a cage for holding the torque transmission ball.
  • the inner diameter of the cage holding portion of the outer joint member is set to be the same as the diameter of a circle inscribed in the tangent line connecting on the joint outer diameter side of the adjacent balls along the circumferential direction. It is constituted by an arc of a track groove of the joint member, the cage holding portion, and a tangent line connecting the arc and the cage holding portion.
  • the inner diameter shape of the outer joint member is constituted by a circular arc and a straight line without any step.
  • the number of torque transmission balls is preferably 3 to 5 in the first sliding type constant velocity universal joint, and 5 in the second sliding type constant velocity universal joint.
  • the outer diameter shape of the outer joint member is substantially similar to the inner diameter shape of the outer joint member, and can be set so that the thickness of the outer joint member is substantially the same over the entire circumference.
  • the outer joint member can be a molded product formed by drawing or squeezing a pipe material, or a molded product by press drawing from a steel plate.
  • the outer joint member is preferably subjected to a thermosetting treatment at least on the inner diameter surface after forming the shape.
  • various heat treatments such as induction hardening and carburizing and quenching can be employed.
  • the cross-sectional shape of the track groove can be a Gothic arch shape that makes an angular contact with the ball.
  • the inner joint member and the shaft protruding from the inner joint member can be an integrally molded product.
  • the sliding type constant velocity universal joint of the present invention can be used for a constant velocity universal joint for a drive shaft of an automobile or a constant velocity universal joint for a propeller shaft of an automobile.
  • the inner diameter shape of the outer joint member is formed with a circular arc and a straight line without any step, so that it is easy to shape the inner diameter surface of the outer joint member. Therefore, it is possible to form an inner surface with high accuracy.
  • the thickness of the outer joint member is substantially the same over the entire circumference, it is possible to facilitate the shaping of the outer diameter surface of the outer joint member.
  • the pipe material is drawn or ironed
  • the steel sheet can be formed by press drawing of the steel sheet, forged, and the choice of manufacturing method is widened. Thereby, the cheapest manufacturing method suitable for the manufacturing region can be selected, and productivity can be improved.
  • the contact load between the ball and the track groove due to the torque load generates a contact surface (contact ellipse) between the ball and the track groove due to elastic deformation.
  • the track groove of the outer joint member is a finite arc (in the cross section in the radial direction), and when the contact load becomes very large, the contact ellipse becomes large and the contact part becomes It may protrude from the track groove. In this case, the stress concentrates on the end of the ball groove (the corner where the ball groove and the inner diameter are connected), which may cause problems such as peeling.
  • the track groove of the outer joint member and the inner diameter surface are smoothly connected by a tangent line, stress concentration due to protrusion to the contact portion can be prevented, and problems at high loads can be prevented.
  • the number of track grooves and cage pockets are determined according to the number of balls. For this reason, by reducing the number of balls from 3 to 5, the number of parts can be reduced, and the outer joint member, the inner joint member, and the processing location of the cage (track groove and cage window) can be reduced. Can do. For this reason, with this sliding type constant velocity universal joint, it is possible to achieve an improvement in productivity and a reduction in production cost by reducing the number of processing steps.
  • the outer joint member is subjected to a thermosetting treatment after shape formation, a high-quality constant velocity universal joint can be provided that is excellent in strength. Further, by making the cross-sectional shape of the track groove a Gothic arch shape, the contact state of the ball with the track groove can be stabilized.
  • the inner joint member and the shaft are integrally formed, the process of assembling the shaft to the inner joint member can be omitted, and the number of processing steps can be reduced to improve the assembly workability. Moreover, by integrating the inner joint member and the shaft, the ball PCD can be made smaller and more compact.
  • This sliding type constant velocity universal joint includes an outer joint member 11, an inner joint member 12, a torque transmission ball 13, and a cage 14 as main components.
  • the outer joint member 11 is formed of a cylindrical body having a substantially equal thickness T on the entire circumference, and track grooves 16 are formed on the inner diameter surface 15 at a pitch of 120 degrees along the circumferential direction.
  • the inner joint member 12 is formed of a block body in which track grooves 18 are formed on the outer diameter surface 17 at a pitch of 120 degrees along the circumferential direction. Further, a shaft 19 is projected from the inner joint member 12 as shown by a virtual line in FIG. In this case, the inner joint member 12 and the shaft 19 are integrally formed products.
  • the cage 14 is provided with pockets 14c in which the balls 13 are held at a pitch of 120 degrees along the circumferential direction.
  • the center of curvature O1 of the outer peripheral spherical surface 14a of the cage 14 and the center of curvature O2 of the inner peripheral spherical surface 14b of the cage 14 are a joint center O (a straight line passing through the ball center Ob and orthogonal to the joint axis L, and a joint axis L). Are offset by an equal distance on the opposite sides in the axial direction.
  • the outer joint member 11 has a shape in which the central portion of the side between the top portions 20 bulges in a convex shape in a triangular shape in which the top portion 20 has a convex round shape.
  • the inner diameter portion of the top portion 20 constitutes the track groove 16
  • the bulging portion 21 between the top portions 20 constitutes the cage holding portion 22 that holds the outer diameter surface of the cage 14.
  • the inner diameter D1 of the inner surface 22a of the cage holding portion 22 in the outer joint member 11 is a circle C inscribed in a tangent line L1 connecting the arcs C1 of the track grooves of adjacent balls 13 and 13 along the circumferential direction. Is set larger than the diameter D2. That is, D1> D2.
  • the inner diameter shape of the outer joint member 11 is an arc C1 of the track groove of the outer joint member 11, an inner surface 22a of the cage holding portion 22, and a tangent L2 connecting the arc C1 and the inner surface 22a of the cage holding portion 22. It is composed.
  • the outer diameter shape of the outer joint member 11 is substantially similar to the inner diameter shape of the outer joint member 11. For this reason, the outer joint member 11 has substantially the same thickness T over the entire circumference.
  • a notch 30 is provided on the outer diameter surface 17 of the inner joint member 12. As a result, the contact area between the outer diameter surface 17 of the inner joint member 12 and the inner peripheral spherical surface 14b of the cage 14 is reduced, but such a notch 30 may not be provided.
  • the outer joint member 11 has a substantially uniform (uniform) thickness T in the radial cross section, and the inner diameter shape is a straight line with an arc and has no step.
  • the outer joint member 11 can be formed by drawing or ironing a pipe material or by press drawing from a steel plate.
  • Drawing is a processing method for producing a long material having a target cross-sectional shape by passing a pipe material or wire through a tool (die) having a hole and reducing the tensile diameter while holding the tip.
  • the ironing process is a process in which at least a part of a plate material having a predetermined thickness is squeezed with a tool to reduce the thickness of the squeezed portion.
  • the press drawing is a method in which a metal plate material is supported on a die and the plate material is pressed by a punch while the periphery is pressed by a crease presser.
  • thermosetting treatment various heat treatments such as induction hardening and carburizing and quenching can be employed.
  • induction hardening is a hardening method that applies the principle of heating a conductive object by placing Joule heat in a coil through which high-frequency current flows, and generating Joule heat by electromagnetic induction. is there.
  • carburizing and quenching is a method in which carbon is infiltrated / diffused from the surface of a low carbon material and then quenched.
  • the inner diameter shape of the outer joint member 11 is composed of a circular arc and a straight line without a step.
  • the shape forming of the inner diameter surface 15 of the outer joint member 11 can be facilitated, and the inner diameter surface can be formed with high accuracy.
  • the wall thickness T of the outer joint member 11 is substantially the same over the entire circumference, it is possible to facilitate the shaping of the outer diameter surface of the outer joint member 11.
  • the pipe material is drawn out.
  • Forming can be performed by processing, ironing, or press drawing of a steel plate, and forging can be performed, so that the choice of manufacturing method is widened. Thereby, the cheapest manufacturing method suitable for the manufacturing facility can be selected, and the productivity can be improved.
  • the step of assembling the shaft 19 to the inner joint member 12 can be omitted, and the number of processing steps can be reduced to improve the assembly workability. it can.
  • the ball PCD can be made smaller and more compact.
  • FIG. 5 shows another embodiment.
  • the number of balls 13 is three in the above-described embodiment, whereas the number is five.
  • five track grooves 16 are provided on the inner diameter surface 15 of the outer joint member 11, and five track grooves 18 are provided on the outer diameter surface 17 of the inner joint member 12.
  • the outer joint member 11 is formed of a square cylinder having a regular pentagonal cross section with a convex portion 20 at the top portion 20. Moreover, unlike the said embodiment, the bulging part is not formed in each edge
  • the inner diameter portion of the top portion 20 constitutes the track groove 16.
  • the inner diameter shape of the outer joint member 11 is constituted by a tangent L2 connecting the arc C1 of the track groove of the outer joint member 11 and the arc C1 of the adjacent track groove.
  • the tangent line L1 and the tangent line L2 are the same.
  • the outer diameter shape of the outer joint member 11 is substantially similar to the inner diameter shape of the outer joint member 11. For this reason, the outer joint member 11 has substantially the same wall thickness on the entire circumference. *
  • the inner diameter shape of the outer joint member 11 is composed of a circular arc and a straight line without a step.
  • the wall thickness T of the outer joint member 11 is substantially the same over the entire circumference. Therefore, even the sliding type constant velocity universal joint shown in FIG. 5 has the same effects as the sliding type constant velocity universal joint shown in FIGS.
  • the number of track grooves 12 and the number of pockets in the cage 14 are determined according to the number of balls. For this reason, by setting the number of balls to 3 to 5, the number of parts can be reduced as compared with general 6 or 8 designs. In addition, the processing locations (track grooves and cage windows) of the outer joint member 11, the inner joint member 12, and the cage 14 can be reduced. For this reason, the improvement of productivity and reduction in production cost can be achieved by reducing the number of processing steps.
  • each track bottom shape of each track groove 16, 18 is a simple arc, but the cross-sectional shapes of the track groove 16 of the outer joint member 11 and the track groove 18 of the inner joint member 12 are shown in FIG.
  • the ball 13 has a Gothic arch shape that makes an angular contact.
  • the track grooves 16 and 18 having the Gothic arch shape have two ball contact points P and Q (ball contact angle ⁇ ) that make angular contact with the ball 13. Such angular contact is preferable in that the contact state of the ball 13 with the track grooves 16 and 18 is stabilized.
  • the sliding type constant velocity universal joint configured as described above is most suitable for a constant velocity universal joint for a drive shaft of an automobile and a constant velocity universal joint for a propeller shaft of an automobile.
  • D1 D2.
  • D1> D2 may be sufficient.
  • the number of balls 13 may be four.
  • the difference between D1 and D2 can be set by the outer diameter of the outer joint member 11, the ball diameter, the outer diameter of the inner joint member 12, and the like.
  • the thickness of the outer joint member 11 can be variously changed according to the strength, the material to be used, the outer diameter of the outer joint member 11, the part to be used, and the like.
  • the inner joint member 12 and the shaft 19 are integrally formed, but the inner joint member 12 and the shaft 19 may be formed separately and then assembled. Further, when the outer joint member 11 is subjected to thermosetting treatment, the outer diameter surface may be subjected to thermosetting treatment in addition to the inner diameter surface 17. Furthermore, a heat curing process may be performed from the inner diameter surface 17 to the outer diameter surface.
  • a ball is used for the torque transmission member.
  • the number of balls is 3 to 5.
  • outer joint member 12 inner joint member 13 torque transmission ball 14 cage 15 inner diameter surface 16 track groove 17 outer diameter surface 18 track groove 19 shaft 22 cage holding portion

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Provided is a sliding-type constant-velocity universal joint having excellent productivity, wherein it is possible to reduce costs with regard to casting devices. Specifically, disclosed is a constant-velocity universal joint provided with: an outer joint member (11) which is formed with track grooves (16) on the inner diameter surface (15); an inner joint member (12) which is formed with track grooves (18) on the outer diameter surface (17); torque transmission balls (13) which are disposed on a torque transmission ball track formed by means of track grooves (16) of the outer joint member (11) and track grooves (18) of the inner joint member (12) corresponding to track grooves (16); and a cage (14) for holding the torque transmission balls (13). The inner diameter of a cage holding section (22) of the outer joint member (11) is set to be larger than the diameter of a circle which inscribes to a tangent line connecting the adjacent balls (13) on the side of the outer diameter of the joint along the circumferential direction. The shape of the inner diameter of the outer joint member (11) is configured by means of the arcs of the track grooves of the outer joint member (11) and the cage holding section (22) and of a tangent line connecting the arcs and cage holding section (22).

Description

摺動型等速自在継手Sliding type constant velocity universal joint
　本発明は、軽自動車やそれより小型な自動車、またはレジャー・農耕用の特殊車両に使用するドライブシャフト等に適用する摺動型等速自在継手に関する。 The present invention relates to a sliding type constant velocity universal joint applied to a drive shaft or the like used for a light vehicle, a smaller vehicle, or a special vehicle for leisure and agriculture.
　等速自在継手は固定型等速自在継手と摺動型等速自在継手とに大別される。固定型等速自在継手は、角度変位のみを許容し、ドライブシャフトの車輪側等に使用される。一方、摺動型等速自在継手は角度変位および軸方向変位を許容し、ドライブシャフトのディファレンシャル側等に使用される。 等 Constant velocity universal joints are roughly classified into fixed type constant velocity universal joints and sliding type constant velocity universal joints. The fixed type constant velocity universal joint allows only angular displacement and is used on the wheel side of the drive shaft. On the other hand, the sliding type constant velocity universal joint allows angular displacement and axial displacement, and is used on the differential side of the drive shaft.
　摺動型等速自在継手としては、特許文献１や特許文献２等に記載のようなダブルオフセットタイプのものがある。ダブルオフセットタイプの等速自在継手は、図７と図８に示すように、円筒形状内周面１に軸方向に延びる複数のトラック溝２を形成した外側継手部材３と、球面状外周面４に軸方向に延びる複数のトラック溝５を形成した内側継手部材６と、外側継手部材３と内側継手部材６との間に介在してトルク伝達を行うトルク伝達ボール７とを備える。トルク伝達ボール７は、ケージ９のポケット８に保持される。 As the sliding type constant velocity universal joint, there is a double offset type as described in Patent Document 1, Patent Document 2, and the like. As shown in FIGS. 7 and 8, the double offset type constant velocity universal joint includes an outer joint member 3 in which a plurality of track grooves 2 extending in the axial direction are formed on a cylindrical inner peripheral surface 1, and a spherical outer peripheral surface 4. And an inner joint member 6 formed with a plurality of track grooves 5 extending in the axial direction, and a torque transmission ball 7 interposed between the outer joint member 3 and the inner joint member 6 for transmitting torque. The torque transmission ball 7 is held in the pocket 8 of the cage 9.
　ケージ９の球面状外周面９ａの曲率中心Ｏ１と球面状内周面９ｂの曲率中心Ｏ２を、継手中心Ｏを挟んで軸方向に互いに逆方向に等距離だけオフセットさせたものである。なお、外側継手部材３の内周面開口端部には、継手内部部品Ｓ（内側継手部材６とケージ９とボール７等）の抜け止めとしてのリング体（丸止め輪）１０が付設されている。 The center of curvature O1 of the spherical outer peripheral surface 9a of the cage 9 and the center of curvature O2 of the spherical inner peripheral surface 9b are offset by an equal distance in the opposite directions in the axial direction across the joint center O. In addition, a ring body (round retaining ring) 10 is attached to the inner peripheral surface opening end of the outer joint member 3 as a joint preventing part S (inner joint member 6, cage 9, ball 7, etc.). Yes.
　ダブルオフセットタイプの等速自在継手におけるトルク伝達ボール７の一般的な個数は６個又は８個であるが今までに、６個未満である３個～５個であるダブルオフセットタイプの等速自在継手も提案されている（特許文献３～特許文献５）。 In general, the number of torque transmission balls 7 in a double offset type constant velocity universal joint is 6 or 8, but so far, 3 to 5 which is less than 6 is available. Joints have also been proposed (Patent Documents 3 to 5).
特開平１０－７３１２９号公報Japanese Patent Laid-Open No. 10-73129 特開２００４－３４７１１４号公報JP 2004-347114 A 特開昭４５－２４８４公報JP-A-45-2484 特開昭４８－３８６５３公報JP-A-48-38653 特開平１－１８２９７公報Japanese Patent Laid-Open No. 1-18297
ところで、前記図７と図８等に示すダブルオフセットタイプの等速自在継手における外側継手部材は、一般的には熱間鍛造と冷間鍛造にて外径面と内径面とトラック溝とを同時成形している。このため、成形のための装置（鍛造装置）が高価となっていた。 By the way, the outer joint member in the double offset type constant velocity universal joint shown in FIG. 7 and FIG. 8 is generally provided with the outer diameter surface, the inner diameter surface and the track groove simultaneously by hot forging and cold forging. Molding. For this reason, the apparatus (forging apparatus) for shaping | molding was expensive.
　本発明の課題は、生産性に優れ、かつ成形のための装置の低コスト化を達成できる摺動型等速自在継手を提案する。 The object of the present invention is to propose a sliding type constant velocity universal joint that is excellent in productivity and can achieve cost reduction of a molding apparatus.
　本発明の第１の摺動型等速自在継手は、内径面にトラック溝を形成した外側継手部材と、外径面にトラック溝を形成した内側継手部材と、外側継手部材のトラック溝とこれに対応する内側継手部材のトラック溝とが協働して形成されるトルク伝達ボールトラックに配設されるトルク伝達ボールと、トルク伝達ボールを保持するケージとを備えた等速自在継手であって、外側継手部材におけるケージ保持部の内径を、周方向に沿って隣合うボールの継手外径側において結ぶ接線に内接する円の直径よりも大きく設定するとともに、外側継手部材の内径形状は、外側継手部材のトラック溝の円弧と、前記ケージ保持部の内面と、前記円弧とケージ保持部の内面とを結ぶ接線とで構成したものである。 A first sliding type constant velocity universal joint of the present invention includes an outer joint member having a track groove formed on an inner diameter surface, an inner joint member having a track groove formed on an outer diameter surface, and a track groove of the outer joint member. A constant velocity universal joint comprising a torque transmission ball disposed in a torque transmission ball track formed by cooperation with a track groove of an inner joint member corresponding to the above, and a cage for holding the torque transmission ball. The inner diameter of the cage holding portion of the outer joint member is set to be larger than the diameter of a circle inscribed in a tangent line connected on the joint outer diameter side of adjacent balls along the circumferential direction. It is constituted by an arc of a track groove of the joint member, an inner surface of the cage holding portion, and a tangent line connecting the arc and the inner surface of the cage holding portion.
　本発明の第２の摺動型等速自在継手は、内径面にトラック溝を形成した外側継手部材と、外径面にトラック溝を形成した内側継手部材と、外側継手部材のトラック溝とこれに対応する内側継手部材のトラック溝とが協働して形成されるトルク伝達ボールトラックに配設されるトルク伝達ボールと、トルク伝達ボールを保持するケージとを備えた等速自在継手であって、外側継手部材におけるケージ保持部の内径を、周方向に沿って隣合うボールの継手外径側において結ぶ接線に内接する円の直径と同一に設定するとともに、外側継手部材の内径形状は、外側継手部材のトラック溝の円弧と前記ケージ保持部と、前記円弧とケージ保持部とを結ぶ接線とで構成したものである。 A second sliding type constant velocity universal joint according to the present invention includes an outer joint member having a track groove formed on the inner diameter surface, an inner joint member having a track groove formed on the outer diameter surface, and a track groove of the outer joint member. A constant velocity universal joint comprising a torque transmission ball disposed in a torque transmission ball track formed by cooperation with a track groove of an inner joint member corresponding to the above, and a cage for holding the torque transmission ball. The inner diameter of the cage holding portion of the outer joint member is set to be the same as the diameter of a circle inscribed in the tangent line connecting on the joint outer diameter side of the adjacent balls along the circumferential direction. It is constituted by an arc of a track groove of the joint member, the cage holding portion, and a tangent line connecting the arc and the cage holding portion.
　本発明の第１および第２の摺動型等速自在継手によれば、外側継手部材の内径形状は、円弧と直線で段差がなく構成される。なお、トルク伝達ボールとしては、第１の摺動型等速自在継手においては、３個から５個のいずれかであり、第２の摺動型等速自在継手においては、５個が好ましい。 According to the first and second sliding type constant velocity universal joints of the present invention, the inner diameter shape of the outer joint member is constituted by a circular arc and a straight line without any step. The number of torque transmission balls is preferably 3 to 5 in the first sliding type constant velocity universal joint, and 5 in the second sliding type constant velocity universal joint.
　外側継手部材の外径形状は前記外側継手部材の内径形状とほぼ相似形であって、外側継手部材の肉厚が全周においてほぼ同一であるように設定することができる。外側継手部材は、パイプ材を引抜き加工またはしごき加工で成形されてなる成形品としたり、鋼板からのプレス絞り加工での成形品としたりできる。外側継手部材は、形状形成後に少なくとも内径面に熱硬化処理を施すようにするのが好ましい。熱硬化処理としては、高周波焼入れや浸炭焼入れ等の種々の熱処理を採用することができる。 The outer diameter shape of the outer joint member is substantially similar to the inner diameter shape of the outer joint member, and can be set so that the thickness of the outer joint member is substantially the same over the entire circumference. The outer joint member can be a molded product formed by drawing or squeezing a pipe material, or a molded product by press drawing from a steel plate. The outer joint member is preferably subjected to a thermosetting treatment at least on the inner diameter surface after forming the shape. As the thermosetting treatment, various heat treatments such as induction hardening and carburizing and quenching can be employed.
　トラック溝の横断面形状は、ボールとアンギュラ接触するゴシックアーチ形状とすることができる。また、内側継手部材と、この内側継手部材から突設されるシャフトとが一体成形品とすることができる。 The cross-sectional shape of the track groove can be a Gothic arch shape that makes an angular contact with the ball. Further, the inner joint member and the shaft protruding from the inner joint member can be an integrally molded product.
　本発明の摺動型等速自在継手は、自動車のドライブシャフト用等速自在継手に用いたり、自動車のプロペラシャフト用等速自在継手に用いたりできる。 The sliding type constant velocity universal joint of the present invention can be used for a constant velocity universal joint for a drive shaft of an automobile or a constant velocity universal joint for a propeller shaft of an automobile.
　本発明では、本発明の摺動型等速自在継手では、外側継手部材の内径形状は、円弧と直線で段差がなく構成されるので、外側継手部材の内径面の形状成形の容易化を図ることができ、高精度な内径面形成が可能となる。特に、外側継手部材の肉厚が全周においてほぼ同一であれば、外側継手部材の外径面の形状成形の容易化を図ることができる。 In the present invention, in the sliding type constant velocity universal joint according to the present invention, the inner diameter shape of the outer joint member is formed with a circular arc and a straight line without any step, so that it is easy to shape the inner diameter surface of the outer joint member. Therefore, it is possible to form an inner surface with high accuracy. In particular, if the thickness of the outer joint member is substantially the same over the entire circumference, it is possible to facilitate the shaping of the outer diameter surface of the outer joint member.
　このため、外側継手部材の内径形状が円弧と直線からなって段差がなく、しかも、外側継手部材の肉厚が全周においてほぼ同一であるものであれば、パイプ材の引抜き加工やしごき加工、または、鋼板のプレス絞り加工等で成形が可能であるとともに、鍛造成形も可能で、製造方法の選択肢が広くなる。これによって、製造地域にあった最も安価な製造方法を選択することができ、生産性の向上を図ることができる。 For this reason, if the inner diameter shape of the outer joint member is an arc and a straight line and there is no step, and the thickness of the outer joint member is substantially the same in the entire circumference, the pipe material is drawn or ironed, Alternatively, the steel sheet can be formed by press drawing of the steel sheet, forged, and the choice of manufacturing method is widened. Thereby, the cheapest manufacturing method suitable for the manufacturing region can be selected, and productivity can be improved.
　ところで、トルク負荷によるボールとトラック溝の接触荷重で、弾性変形によるボールとトラック溝の接触面(接触楕円)が発生する。従来のダブルオフセットタイプの摺動型等速自在継手は、外側継手部材のトラック溝は有限円弧であり（半径方向断面にて）、接触荷重が非常に大きくなると接触楕円も大きくなり、接触部がトラック溝からはみ出す場合がある。この場合、ボール溝端（ボール溝と内径の繋がる角部）に応力が集中し剥離などの不具合が発生する場合がある。これに対して、本発明では、外側継手部材のトラック溝と、内径面とは接線で滑らかに繋がっているので、接触部にはみ出しによる応力集中が防止でき、高負荷時の不具合を防止できる。 By the way, the contact load between the ball and the track groove due to the torque load generates a contact surface (contact ellipse) between the ball and the track groove due to elastic deformation. In the conventional double offset type sliding type constant velocity universal joint, the track groove of the outer joint member is a finite arc (in the cross section in the radial direction), and when the contact load becomes very large, the contact ellipse becomes large and the contact part becomes It may protrude from the track groove. In this case, the stress concentrates on the end of the ball groove (the corner where the ball groove and the inner diameter are connected), which may cause problems such as peeling. On the other hand, in the present invention, since the track groove of the outer joint member and the inner diameter surface are smoothly connected by a tangent line, stress concentration due to protrusion to the contact portion can be prevented, and problems at high loads can be prevented.
　トラック溝の数やケージのポケット数は、ボール数に対応して決定される。このため、ボール数が３個から５個とすることによって、部品点数の減少を図ることができ、しかも、外側継手部材、内側継手部材及びケージの加工箇所（トラック溝及びケージ窓）を減らすことができる。このため、この摺動型等速自在継手では、加工工程数の減少を図って生産性の向上及び生産コスト低減を達成できる。 The number of track grooves and cage pockets are determined according to the number of balls. For this reason, by reducing the number of balls from 3 to 5, the number of parts can be reduced, and the outer joint member, the inner joint member, and the processing location of the cage (track groove and cage window) can be reduced. Can do. For this reason, with this sliding type constant velocity universal joint, it is possible to achieve an improvement in productivity and a reduction in production cost by reducing the number of processing steps.
　外側継手部材として、形状形成後に熱硬化処理を施すものであれば、強度的に優れ、高品質な等速自在継手を提供できる。また、トラック溝の横断面形状はゴシックアーチ形状とすることによって、トラック溝に対するボールの接触状態を安定化することが可能となる。また、内側継手部材とシャフトとが一体成形品であれば、内側継手部材にシャフトを組み付ける工程を省略でき、加工工程数の減少を図って、組立て作業性の向上を図ることができる。しかも、内側継手部材とシャフトとを一体化することによって、ボールＰＣＤを小さくしてコンパクト化を図ることができる。 If the outer joint member is subjected to a thermosetting treatment after shape formation, a high-quality constant velocity universal joint can be provided that is excellent in strength. Further, by making the cross-sectional shape of the track groove a Gothic arch shape, the contact state of the ball with the track groove can be stabilized. In addition, if the inner joint member and the shaft are integrally formed, the process of assembling the shaft to the inner joint member can be omitted, and the number of processing steps can be reduced to improve the assembly workability. Moreover, by integrating the inner joint member and the shaft, the ball PCD can be made smaller and more compact.
　自動車のドライブシャフト用等速自在継手や自動車のプロペラシャフト用等速自在継手に最適となる。 It is optimal for constant velocity universal joints for automobile drive shafts and constant velocity universal joints for automobile propeller shafts.
本発明の第１の摺動型等速自在継手の横断面図である。It is a cross-sectional view of the first sliding type constant velocity universal joint of the present invention. 前記摺動型等速自在継手の縦断面図である。It is a longitudinal cross-sectional view of the said sliding type constant velocity universal joint. 前記摺動型等速自在継手の断面正面図である。It is a cross-sectional front view of the sliding type constant velocity universal joint. 外側継手部材と内側継手部材との寸法関係を示す横断面図である。It is a cross-sectional view showing a dimensional relationship between the outer joint member and the inner joint member. 本発明の第２の摺動型等速自在継手の横断面図である。It is a cross-sectional view of the second sliding type constant velocity universal joint of the present invention. トラック溝の他の形状を示す断面図である。It is sectional drawing which shows the other shape of a track groove. 従来のダブルオフセットタイプの摺動型等速自在継手の縦断面図である。It is a longitudinal cross-sectional view of a conventional double offset type sliding type constant velocity universal joint. 前記図７に示す摺動型等速自在継手の横断面図である。It is a cross-sectional view of the sliding type constant velocity universal joint shown in FIG.
以下、本発明の実施形態を図面に従って説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１～図３は本発明の等速自在継手であるダブルオフセットタイプの摺動型等速自在継手を示している。この摺動型等速自在継手は、外側継手部材１１と、内側継手部材１２と、トルク伝達ボール１３と、ケージ１４とを主要な構成要素としている。 1 to 3 show a double offset type sliding type constant velocity universal joint which is a constant velocity universal joint of the present invention. This sliding type constant velocity universal joint includes an outer joint member 11, an inner joint member 12, a torque transmission ball 13, and a cage 14 as main components.
　外側継手部材１１は、その肉厚Ｔが全周においてほぼ同一の筒体からなり、その内径面１５に周方向に沿って１２０度ピッチでトラック溝１６が形成されている。また、内側継手部材１２は、その外径面１７に周方向に沿って１２０度ピッチでトラック溝１８が形成されたブロック体からなる。また、この内側継手部材１２には図２の仮想線で示すように、シャフト１９が突設されている。この場合、内側継手部材１２とシャフト１９とは一体成形品である。 The outer joint member 11 is formed of a cylindrical body having a substantially equal thickness T on the entire circumference, and track grooves 16 are formed on the inner diameter surface 15 at a pitch of 120 degrees along the circumferential direction. The inner joint member 12 is formed of a block body in which track grooves 18 are formed on the outer diameter surface 17 at a pitch of 120 degrees along the circumferential direction. Further, a shaft 19 is projected from the inner joint member 12 as shown by a virtual line in FIG. In this case, the inner joint member 12 and the shaft 19 are integrally formed products.
　ケージ１４は、周方向に沿って１２０度ピッチでボール１３が保持されるポケット１４ｃが設けられている。また、ケージ１４の外周球面１４ａの曲率中心Ｏ１と、ケージ１４の内周球面１４ｂの曲率中心Ｏ２は、継手中心Ｏ（ボール中心Ｏｂを通って継手軸線Ｌと直交する直線と、継手軸線Ｌとの交点）を挟んで、軸方向に互いに反対側に等距離だけオフセットされている。 The cage 14 is provided with pockets 14c in which the balls 13 are held at a pitch of 120 degrees along the circumferential direction. The center of curvature O1 of the outer peripheral spherical surface 14a of the cage 14 and the center of curvature O2 of the inner peripheral spherical surface 14b of the cage 14 are a joint center O (a straight line passing through the ball center Ob and orthogonal to the joint axis L, and a joint axis L). Are offset by an equal distance on the opposite sides in the axial direction.
　ところで、外側継手部材１１は、その横断面形状を頂部２０が凸アール状の三角形において、頂部２０間の辺の中央部を凸状に膨出させた形状である。このため、頂部２０の内径部が前記トラック溝１６を構成し、頂部２０間の膨出部２１がケージ１４の外径面を保持するケージ保持部２２を構成する。 By the way, the outer joint member 11 has a shape in which the central portion of the side between the top portions 20 bulges in a convex shape in a triangular shape in which the top portion 20 has a convex round shape. For this reason, the inner diameter portion of the top portion 20 constitutes the track groove 16, and the bulging portion 21 between the top portions 20 constitutes the cage holding portion 22 that holds the outer diameter surface of the cage 14.
　図４に示すように、外側継手部材１１におけるケージ保持部２２の内面２２ａの内径Ｄ１を、周方向に沿って隣合うボール１３、１３のトラック溝の円弧Ｃ１を結ぶ接線Ｌ１に内接する円Ｃの直径Ｄ２よりも大きく設定する。すなわち、Ｄ１＞Ｄ２としている。また、外側継手部材１１の内径形状は、外側継手部材１１のトラック溝の円弧Ｃ１と、ケージ保持部２２の内面２２ａと、前記円弧Ｃ１とケージ保持部２２の内面２２ａとを結ぶ接線Ｌ２とで構成している。 As shown in FIG. 4, the inner diameter D1 of the inner surface 22a of the cage holding portion 22 in the outer joint member 11 is a circle C inscribed in a tangent line L1 connecting the arcs C1 of the track grooves of adjacent balls 13 and 13 along the circumferential direction. Is set larger than the diameter D2. That is, D1> D2. Further, the inner diameter shape of the outer joint member 11 is an arc C1 of the track groove of the outer joint member 11, an inner surface 22a of the cage holding portion 22, and a tangent L2 connecting the arc C1 and the inner surface 22a of the cage holding portion 22. It is composed.
　外側継手部材１１の外径形状は、外側継手部材１１の内径形状とほぼ相似形である。このため、外側継手部材１１が全周においてその肉厚Ｔがほぼ同じである。なお、この実施形態においては、内側継手部材１２の外径面１７に切欠部３０が設けられている。これによって、内側継手部材１２の外径面１７とケージ１４の内周球面１４ｂとの接触面積を減少させているが、このような切欠部３０を設けなくてもよい。 The outer diameter shape of the outer joint member 11 is substantially similar to the inner diameter shape of the outer joint member 11. For this reason, the outer joint member 11 has substantially the same thickness T over the entire circumference. In this embodiment, a notch 30 is provided on the outer diameter surface 17 of the inner joint member 12. As a result, the contact area between the outer diameter surface 17 of the inner joint member 12 and the inner peripheral spherical surface 14b of the cage 14 is reduced, but such a notch 30 may not be provided.
　ところで、外側継手部材１１が半径方向断面において、ほぼ均一（均等）な肉厚Ｔであり、しかも、内径形状が円弧と直線で段差がない構成とされるものである。このため、外側継手部材１１は、パイプ材を引抜き加工またはしごき加工で成形したり、鋼板からのプレス絞り加工で成形したりできる。引抜き加工は、孔のあいた工具(ダイス)にパイプ材や線材を通し、その先端を保持した状態で引張り径を小さくすることによって、目的の断面形状を有する長尺材を作る加工法である。また、しごき加工とは、所定の板厚の板材の少なくとも一部を工具でしごくことにより、このしごいた部分の板厚を薄くする加工である。プレス絞り加工とは、ダイの上に金属の板材を支持し、周囲をしわ押えで押えた状態で、パンチにて板材を押し込んで加工する方法である。 By the way, the outer joint member 11 has a substantially uniform (uniform) thickness T in the radial cross section, and the inner diameter shape is a straight line with an arc and has no step. For this reason, the outer joint member 11 can be formed by drawing or ironing a pipe material or by press drawing from a steel plate. Drawing is a processing method for producing a long material having a target cross-sectional shape by passing a pipe material or wire through a tool (die) having a hole and reducing the tensile diameter while holding the tip. The ironing process is a process in which at least a part of a plate material having a predetermined thickness is squeezed with a tool to reduce the thickness of the squeezed portion. The press drawing is a method in which a metal plate material is supported on a die and the plate material is pressed by a punch while the periphery is pressed by a crease presser.
　また、外側継手部材１１においては、前記のように形状を形成した後は、少なくとも内径面１５に対して熱硬化処理を施すようにしている。熱硬化処理としては、高周波焼入れや浸炭焼入れ等の種々の熱処理を採用することができる。ここで、高周波焼入れとは、高周波電流の流れているコイル中に焼入れに必要な部分を入れ、電磁誘導作用により、ジュール熱を発生させて、伝導性物体を加熱する原理を応用した焼入れ方法である。また、浸炭焼入れとは、低炭素材料の表面から炭素を浸入／拡散させ、その後に焼入れを行う方法である。 Further, in the outer joint member 11, after the shape is formed as described above, at least the inner diameter surface 15 is subjected to a thermosetting treatment. As the thermosetting treatment, various heat treatments such as induction hardening and carburizing and quenching can be employed. Here, induction hardening is a hardening method that applies the principle of heating a conductive object by placing Joule heat in a coil through which high-frequency current flows, and generating Joule heat by electromagnetic induction. is there. In addition, carburizing and quenching is a method in which carbon is infiltrated / diffused from the surface of a low carbon material and then quenched.
　本発明では、外側継手部材１１の内径形状は、円弧と直線で段差がなく構成される。外側継手部材１１の内径面１５の形状成形の容易化を図ることができ、高精度な内径面形成が可能となる。特に、外側継手部材１１の肉厚Ｔが全周においてほぼ同一であれば、外側継手部材１１の外径面の形状成形の容易化を図ることができる。 In the present invention, the inner diameter shape of the outer joint member 11 is composed of a circular arc and a straight line without a step. The shape forming of the inner diameter surface 15 of the outer joint member 11 can be facilitated, and the inner diameter surface can be formed with high accuracy. In particular, if the wall thickness T of the outer joint member 11 is substantially the same over the entire circumference, it is possible to facilitate the shaping of the outer diameter surface of the outer joint member 11.
　このため、外側継手部材１１の内径形状が円弧と直線からなって段差がないものであって、外側継手部材１１の肉厚Ｔが全周においてほぼ同一であるものであれば、パイプ材の引抜き加工やしごき加工、または、鋼板のプレス絞り加工等で成形が可能であるとともに、鍛造成形も可能で、製造方法の選択肢が広くなる。これによって、製造設備にあった最も安価な製造方法を選択することができ、生産性の向上を図ることができる。 For this reason, if the inner diameter shape of the outer joint member 11 is an arc and a straight line and there is no step, and the wall thickness T of the outer joint member 11 is substantially the same in the entire circumference, the pipe material is drawn out. Forming can be performed by processing, ironing, or press drawing of a steel plate, and forging can be performed, so that the choice of manufacturing method is widened. Thereby, the cheapest manufacturing method suitable for the manufacturing facility can be selected, and the productivity can be improved.
　また、内側継手部材１２とシャフト１９とが一体成形品であるので、内側継手部材１２にシャフト１９を組み付ける工程を省略でき、加工工程数の減少を図って、組立て作業性の向上を図ることができる。しかも、内側継手部材１２とシャフト１９とを一体化することによって、ボールＰＣＤを小さくしてコンパクト化を図ることができる。 Further, since the inner joint member 12 and the shaft 19 are integrally formed products, the step of assembling the shaft 19 to the inner joint member 12 can be omitted, and the number of processing steps can be reduced to improve the assembly workability. it can. In addition, by integrating the inner joint member 12 and the shaft 19, the ball PCD can be made smaller and more compact.
　次に、図５は他の実施形態を示し、この場合、前記実施形態ではボール１３が３個であるのに対して、５個である。このため、外側継手部材１１の内径面１５には５個のトラック溝１６が設けられるとともに、内側継手部材１２の外径面１７には５個のトラック溝１８が設けられている。 Next, FIG. 5 shows another embodiment. In this case, the number of balls 13 is three in the above-described embodiment, whereas the number is five. For this reason, five track grooves 16 are provided on the inner diameter surface 15 of the outer joint member 11, and five track grooves 18 are provided on the outer diameter surface 17 of the inner joint member 12.
　外側継手部材１１は、頂部２０が凸アール状の断面正五角形状の角筒体からなる。また、前記実施形態とは相違して、周方向に隣合う頂部２０間の各辺には膨出部が形成されず、直線状とされている。そして、頂部２０の内径部がトラック溝１６を構成する。 The outer joint member 11 is formed of a square cylinder having a regular pentagonal cross section with a convex portion 20 at the top portion 20. Moreover, unlike the said embodiment, the bulging part is not formed in each edge | side between the top parts 20 adjacent to the circumferential direction, but it is made into linear form. The inner diameter portion of the top portion 20 constitutes the track groove 16.
　外側継手部材１１におけるケージ保持部２２の内面２２ａの内径Ｄ１を、周方向に沿って隣合うボール１３、１３のトラック溝の円弧Ｃ１を結ぶ接線Ｌ１に内接する円Ｃの直径Ｄ２と同一に設定している。すなわち、Ｄ１＝Ｄ２としている。この場合も、外側継手部材１１の内径形状は、外側継手部材１１のトラック溝の円弧Ｃ１と隣り合うトラック溝の円弧Ｃ１を結ぶ接線Ｌ２とで構成している。ここで、接線Ｌ１と接線Ｌ２は同一である。また、この場合も、外側継手部材１１の外径形状は、外側継手部材１１の内径形状とほぼ相似形である。このため、外側継手部材１１が全周においてその肉厚がほぼ同じである。　 The inner diameter D1 of the inner surface 22a of the cage holding portion 22 in the outer joint member 11 is set to be the same as the diameter D2 of the circle C inscribed in the tangent L1 connecting the arcs C1 of the track grooves of the adjacent balls 13 and 13 along the circumferential direction. is doing. That is, D1 = D2. Also in this case, the inner diameter shape of the outer joint member 11 is constituted by a tangent L2 connecting the arc C1 of the track groove of the outer joint member 11 and the arc C1 of the adjacent track groove. Here, the tangent line L1 and the tangent line L2 are the same. Also in this case, the outer diameter shape of the outer joint member 11 is substantially similar to the inner diameter shape of the outer joint member 11. For this reason, the outer joint member 11 has substantially the same wall thickness on the entire circumference. *
　図５に示す摺動型等速自在継手であっても、外側継手部材１１の内径形状は、円弧と直線で段差がなく構成される。また、外側継手部材１１の肉厚Ｔが全周においてほぼ同一とされている。このため、この図５の摺動型等速自在継手であっても、前記図１～図３に記載の摺動型等速自在継手と同様の作用効果を奏する。 Even in the sliding type constant velocity universal joint shown in FIG. 5, the inner diameter shape of the outer joint member 11 is composed of a circular arc and a straight line without a step. The wall thickness T of the outer joint member 11 is substantially the same over the entire circumference. Therefore, even the sliding type constant velocity universal joint shown in FIG. 5 has the same effects as the sliding type constant velocity universal joint shown in FIGS.
　トラック溝１２の数やケージ１４のポケット数は、ボール数に対応して決定される。このため、ボール数が３個から５個とすることによって、一般的な６個や８個の設計に較べ部品点数の減少を図ることができる。しかも、外側継手部材１１、内側継手部材１２及びケージ１４の加工箇所（トラック溝及びケージ窓）を減らすことができる。このため、加工工程数の減少を図って生産性の向上及び生産コスト低減を達成できる。 The number of track grooves 12 and the number of pockets in the cage 14 are determined according to the number of balls. For this reason, by setting the number of balls to 3 to 5, the number of parts can be reduced as compared with general 6 or 8 designs. In addition, the processing locations (track grooves and cage windows) of the outer joint member 11, the inner joint member 12, and the cage 14 can be reduced. For this reason, the improvement of productivity and reduction in production cost can be achieved by reducing the number of processing steps.
　前記各実施形態では、各トラック溝１６、１８の溝底形状として単純円弧であったが、外側継手部材１１のトラック溝１６および内側継手部材１２のトラック溝１８の横断面形状を、図６に示すように、ボール１３とアンギュラ接触するゴシックアーチ形状としている。このゴシックアーチ形状を有するトラック溝１６、１８では、ボール１３とアンギュラ接触する二つのボール接触点Ｐ，Ｑ（ボール接触角α）を持っている。このようなアンギュラ接触は、トラック溝１６、１８に対するボール１３の接触状態を安定化させる点で好適である。 In each of the above embodiments, the track bottom shape of each track groove 16, 18 is a simple arc, but the cross-sectional shapes of the track groove 16 of the outer joint member 11 and the track groove 18 of the inner joint member 12 are shown in FIG. As shown, the ball 13 has a Gothic arch shape that makes an angular contact. The track grooves 16 and 18 having the Gothic arch shape have two ball contact points P and Q (ball contact angle α) that make angular contact with the ball 13. Such angular contact is preferable in that the contact state of the ball 13 with the track grooves 16 and 18 is stabilized.
　前記のように構成した摺動型等速自在継手としては、自動車のドライブシャフト用等速自在継手や自動車のプロペラシャフト用等速自在継手に最適となる。 The sliding type constant velocity universal joint configured as described above is most suitable for a constant velocity universal joint for a drive shaft of an automobile and a constant velocity universal joint for a propeller shaft of an automobile.
　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、例えば、図５に示す等速自在継手において、Ｄ１＝Ｄ２としているが、Ｄ１＞Ｄ２であってもよい。また、ボール１３として４個であってもよい。ところで、図１等に示すように、Ｄ１＞Ｄ２とする場合、Ｄ１とＤ２との差としては、外側継手部材１１の外径、ボール径、内側継手部材１２の外径等によって設定できる。外側継手部材１１の肉厚としても、強度性、使用する材質、外側継手部材１１の外径、及び使用される部位等に応じて種々変更できる。 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 are possible. For example, in the constant velocity universal joint shown in FIG. 5, D1 = D2. However, D1> D2 may be sufficient. Further, the number of balls 13 may be four. As shown in FIG. 1 and the like, when D1> D2, the difference between D1 and D2 can be set by the outer diameter of the outer joint member 11, the ball diameter, the outer diameter of the inner joint member 12, and the like. The thickness of the outer joint member 11 can be variously changed according to the strength, the material to be used, the outer diameter of the outer joint member 11, the part to be used, and the like.
　前記実施形態では、内側継手部材１２とシャフト１９とが一体成形品であったが、内側継手部材１２とシャフト１９とを別体として成形した後、これらを組み付けるようにしてもよい。また、外側継手部材１１に熱硬化処理を施す場合、内径面１７に加えて外径面にも熱硬化処理を施してもよい。さらには、内径面１７から外径面にかけて熱硬化処理が施されるものであってもよい。 In the above-described embodiment, the inner joint member 12 and the shaft 19 are integrally formed, but the inner joint member 12 and the shaft 19 may be formed separately and then assembled. Further, when the outer joint member 11 is subjected to thermosetting treatment, the outer diameter surface may be subjected to thermosetting treatment in addition to the inner diameter surface 17. Furthermore, a heat curing process may be performed from the inner diameter surface 17 to the outer diameter surface.
　角度変位のみならず軸方向変位も許容する摺動型等速自在継手である。トルク伝達部材にボールを用いる。ボールの数は３個から５個である。ドライブシャフトやプロペラシャフトに用いられる摺動型等速自在継手に最適となる。 This is a sliding type constant velocity universal joint that allows not only angular displacement but also axial displacement. A ball is used for the torque transmission member. The number of balls is 3 to 5. Optimal for sliding type constant velocity universal joints used for drive shafts and propeller shafts.
１１   外側継手部材
１２   内側継手部材
１３   トルク伝達ボール
１４   ケージ
１５   内径面
１６   トラック溝
１７   外径面
１８   トラック溝
１９   シャフト
２２   ケージ保持部 11 outer joint member 12 inner joint member 13 torque transmission ball 14 cage 15 inner diameter surface 16 track groove 17 outer diameter surface 18 track groove 19 shaft 22 cage holding portion

Claims (12)

  1. 　内径面にトラック溝を形成した外側継手部材と、外径面にトラック溝を形成した内側継手部材と、外側継手部材のトラック溝とこれに対応する内側継手部材のトラック溝とが協働して形成されるトルク伝達ボールトラックに配設されるトルク伝達ボールと、トルク伝達ボールを保持するケージとを備えた摺動型等速自在継手であって、
    　外側継手部材におけるケージ保持部の内径を、周方向に沿って隣合うボールの継手外径側において結ぶ接線に内接する円の直径よりも大きく設定するとともに、外側継手部材の内径形状は、外側継手部材のトラック溝の円弧と、前記ケージ保持部の内面と、前記円弧とケージ保持部とを結ぶ接線とで構成したことを特徴とする摺動型等速自在継手。     The outer joint member having a track groove formed on the inner diameter surface, the inner joint member having a track groove formed on the outer diameter surface, the track groove of the outer joint member, and the track groove of the corresponding inner joint member cooperated. A sliding type constant velocity universal joint provided with a torque transmission ball disposed on a formed torque transmission ball track, and a cage for holding the torque transmission ball,
    The inner diameter of the cage holding portion of the outer joint member is set to be larger than the diameter of a circle inscribed in a tangent line connecting on the joint outer diameter side of adjacent balls along the circumferential direction. A sliding type constant velocity universal joint comprising an arc of a track groove of a member, an inner surface of the cage holding portion, and a tangent line connecting the arc and the cage holding portion.
  2. 　内径面にトラック溝を形成した外側継手部材と、外径面にトラック溝を形成した内側継手部材と、外側継手部材のトラック溝とこれに対応する内側継手部材のトラック溝とが協働して形成されるトルク伝達ボールトラックに配設されるトルク伝達ボールと、トルク伝達ボールを保持するケージとを備えた摺動型等速自在継手であって、
    　外側継手部材におけるケージ保持部の内径を、周方向に沿って隣合うボールの継手外径側において結ぶ接線に内接する円の直径と同一に設定するとともに、外側継手部材の内径形状は、外側継手部材のトラック溝の円弧と、前記ケージ保持部の内面と、前記円弧とケージ保持部の内面とを結ぶ接線とで構成したことを特徴とする摺動型等速自在継手。     The outer joint member having a track groove formed on the inner diameter surface, the inner joint member having a track groove formed on the outer diameter surface, the track groove of the outer joint member, and the track groove of the corresponding inner joint member cooperated. A sliding type constant velocity universal joint provided with a torque transmission ball disposed on a formed torque transmission ball track, and a cage for holding the torque transmission ball,
    The inner diameter of the cage holding portion of the outer joint member is set to be the same as the diameter of a circle inscribed in a tangent line connecting on the joint outer diameter side of adjacent balls along the circumferential direction. A sliding type constant velocity universal joint comprising an arc of a track groove of a member, an inner surface of the cage holding portion, and a tangent line connecting the arc and the inner surface of the cage holding portion.
  3. 　前記トルク伝達ボールが３個から５個のいずれかであることを特徴とする請求項１に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to claim 1, wherein the number of the torque transmission balls is any one of three to five.
  4. 　前記トルク伝達ボールが５個であることを特徴とする請求項２に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to claim 2, wherein the number of torque transmission balls is five.
  5. 　外側継手部材の外径形状は前記外側継手部材の内径形状とほぼ相似形であって、外側継手部材の肉厚が全周においてほぼ同一であることを特徴とする請求項１～請求項４のいずれか１項に記載の摺動型等速自在継手。 5. The outer joint member according to claim 1, wherein an outer diameter shape of the outer joint member is substantially similar to an inner diameter shape of the outer joint member, and a wall thickness of the outer joint member is substantially the same in the entire circumference. The sliding type constant velocity universal joint according to any one of the above.
  6. 　外側継手部材は、パイプ材を引抜き加工またはしごき加工で成形されてなる成形品であることを特徴とする請求項１～請求項５のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 5, wherein the outer joint member is a molded product formed by drawing or ironing a pipe material.
  7. 　外側継手部材は、鋼板からのプレス絞り加工での成形品であることを特徴とする請求項１～請求項５のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 5, wherein the outer joint member is a molded product formed by press drawing from a steel plate.
  8. 　外側継手部材は、形状形成後に少なくとも内径面に熱硬化処理が施されていることを特徴とする請求項１～請求項７のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 7, wherein the outer joint member is heat-cured on at least an inner diameter surface after forming the shape.
  9. 　前記トラック溝の横断面形状は、ボールとアンギュラ接触するゴシックアーチ形状としたことを特徴とする請求項１～請求項８のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 8, wherein a cross-sectional shape of the track groove is a Gothic arch shape that makes an angular contact with the ball.
  10. 　内側継手部材と、この内側継手部材から突設されるシャフトとが一体成形品であることを特徴とする請求項１～請求項９のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 9, wherein the inner joint member and a shaft protruding from the inner joint member are integrally formed.
  11. 　自動車のドライブシャフト用等速自在継手に用いたことを特徴とする請求項１～請求項１０のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 10, which is used for a constant velocity universal joint for a drive shaft of an automobile.
  12. 　自動車のプロペラシャフト用等速自在継手に用いたことを特徴とする請求項１～請求項１０のいずれか１項に記載の摺動型等速自在継手。 The sliding type constant velocity universal joint according to any one of claims 1 to 10, which is used for a constant velocity universal joint for a propeller shaft of an automobile.
PCT/JP2011/060816 2010-05-13 2011-05-11 Sliding-type constant-velocity universal joint WO2011142375A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109611449A (en) * 2019-01-08 2019-04-12 万向钱潮传动轴有限公司 A kind of three alley ball slide constructions
DE102022116964A1 (en) 2022-07-07 2024-01-18 Hirschvogel Holding GmbH Sliding joint outer component, sliding joint and method for producing an outer sliding joint component

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Publication number Priority date Publication date Assignee Title
JPH02129408A (en) * 1988-11-09 1990-05-17 Toyoda Mach Works Ltd Constant velocity joint
JP2001082441A (en) * 1999-09-16 2001-03-27 Ntn Corp Drive shaft
JP2005098450A (en) * 2003-09-26 2005-04-14 Ntn Corp Outside joint member of constant velocity universal joint and manufacturing method thereof
JP2005180641A (en) * 2003-12-22 2005-07-07 Ntn Corp Constant velocity universal joint and method of manufacturing outer ring of constant velocity universal joint
JP2008008475A (en) * 2006-06-30 2008-01-17 Ntn Corp Sliding constant velocity universal joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02129408A (en) * 1988-11-09 1990-05-17 Toyoda Mach Works Ltd Constant velocity joint
JP2001082441A (en) * 1999-09-16 2001-03-27 Ntn Corp Drive shaft
JP2005098450A (en) * 2003-09-26 2005-04-14 Ntn Corp Outside joint member of constant velocity universal joint and manufacturing method thereof
JP2005180641A (en) * 2003-12-22 2005-07-07 Ntn Corp Constant velocity universal joint and method of manufacturing outer ring of constant velocity universal joint
JP2008008475A (en) * 2006-06-30 2008-01-17 Ntn Corp Sliding constant velocity universal joint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109611449A (en) * 2019-01-08 2019-04-12 万向钱潮传动轴有限公司 A kind of three alley ball slide constructions
DE102022116964A1 (en) 2022-07-07 2024-01-18 Hirschvogel Holding GmbH Sliding joint outer component, sliding joint and method for producing an outer sliding joint component

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