WO2014038096A1 - Coupling structure and manufacturing method of spline coupler - Google Patents

Coupling structure and manufacturing method of spline coupler Download PDF

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Publication number
WO2014038096A1
WO2014038096A1 PCT/JP2012/073549 JP2012073549W WO2014038096A1 WO 2014038096 A1 WO2014038096 A1 WO 2014038096A1 JP 2012073549 W JP2012073549 W JP 2012073549W WO 2014038096 A1 WO2014038096 A1 WO 2014038096A1
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Prior art keywords
spline
press
end side
shaft member
protrusion
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PCT/JP2012/073549
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French (fr)
Japanese (ja)
Inventor
精治 井部
敬 松田
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愛知機械工業株式会社
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Priority to PCT/JP2012/073549 priority Critical patent/WO2014038096A1/en
Priority to JP2014534148A priority patent/JP5969615B2/en
Publication of WO2014038096A1 publication Critical patent/WO2014038096A1/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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • 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
    • F16D2250/00—Manufacturing; Assembly

Definitions

  • the present invention relates to a joint structure and a method for manufacturing a spline joined body.
  • the outer diameter of the press-fitted portion formed with a plurality of protrusions on the shaft is formed so as to gradually increase in a tapered shape from the press-fitting start end side toward the press-fitting rear end side.
  • the inner diameter of the hole in the cylindrical member so as to be gradually tapered from the press-fitting start end side toward the press-fitting rear end side, the entire inner peripheral surface of the hole is involved in press-fitting and fixing. There are some that fix the shaft firmly.
  • An object of the present invention is to provide a coupling structure and a method of manufacturing a spline assembly that can firmly press-fit and fix a hollow member to a shaft member without processing and forming a spline strip into a taper shape. The following measures were taken to achieve the part.
  • the present invention provides a coupling structure in which a spline protrusion formed on an outer peripheral surface of a shaft member is press-fitted into a spline recess formed on an inner peripheral surface of a hollow portion of the hollow member, and the hollow member is press-fitted and fixed to the shaft member.
  • the spline ridge is composed of a first spline ridge on the press-fitting start end side and a second spline ridge on the press-fit rear end side having a diameter larger than that of the first spline ridge, Corresponding to the first spline ridges having a diameter corresponding to the second spline ridges on the press-fitting start end side and the first spline ridges on the press-fitting rear end side, which are formed by performing heat treatment on the spline ridges.
  • the gist is that the second spline groove has a diameter.
  • the second spline groove formed on the hollow member is pressed into the second spline protrusion formed on the outer peripheral surface of the shaft member, and the first spline groove formed on the inner peripheral surface of the hollow portion of the hollow member is pressed into the shaft.
  • the hollow member can be firmly fixed to the member.
  • the shape of the hollow member can be made to be more easily thermally deformed on the press-fitting rear end side than on the press-fitting start end side.
  • the radial thickness on the outer side of the inner peripheral surface of the hollow portion of the hollow member can be formed thicker on the press-fitting rear end side than on the press-fitting start end side.
  • the first spline groove on the start end side can be formed with a large diameter.
  • the first spline ridge and the second spline ridge may be formed separately in the axial direction of the shaft member. In this way, spline protrusions with different diameters can be easily secured.
  • the first spline ridge and the second spline ridge may be formed continuously in the axial direction of the shaft member. In this way, spline protrusions with different diameters can be easily secured.
  • the method for producing the spline combined body of the present invention includes: A spline combined body manufacturing method formed by spline fitting a spline recess of a rotating body and a spline protrusion of a shaft member to couple the rotating body to the shaft member, (A) The spline ridge is formed with a first spline ridge on the front side in the insertion direction in which the rotating body of the shaft member is inserted, and has a larger diameter than the first spline ridge and the insertion direction.
  • a first spline groove having a diameter corresponding to the second spline protrusion is formed on the front side of the rotating body in the insertion direction, and in the insertion direction.
  • the first spline groove is spline-fitted with the second spline protrusion, and the second spline groove is spline-fitted with the first spline protrusion, whereby the rotating body is moved to the shaft member.
  • the gist of the present invention is to produce a spline combined body.
  • the spline groove of the hollow member is not formed into a taper shape, but a spline groove having the same diameter is formed from the press-fitting rear end side to the press-fitting start end, and then heat treatment is performed to cause heat treatment distortion.
  • the second spline groove and the first spline groove having different diameters can be easily secured.
  • FIG. 1 is a cross-sectional configuration diagram of a state in which the shaft member 1 is press-fitted and fixed to the hollow member 3.
  • FIG. 2 is a cross-sectional configuration diagram of the spline press-fitted state of the hollow member 3 into the shaft member 1 into which the tooth surface portion 2 ′ of the spline protrusion 2 and the tooth bottom portion 5 ′ of the spline recess 5 are press-fitted.
  • FIG. 3 is an enlarged cross-sectional view showing a main part of the shaft member 1.
  • FIG. 4 is a cross-sectional configuration diagram showing an outline of the configuration of the hollow member 3.
  • FIG. 5 is an enlarged view showing a main part of the hollow member 3 in an enlarged manner.
  • FIG. 6 is a cross-sectional configuration diagram illustrating a state in which the shaft member 1 and the hollow member 3 are relatively moved along the axis line CL and the shaft member 1 is inserted into the hollow portion 4 of the hollow member 3.
  • FIG. 7 is an enlarged cross-sectional configuration diagram of the main part of the hollow member 3 showing a modification.
  • FIG. 8 is an enlarged cross-sectional configuration diagram of a main part showing a modified example of the shaft member 1.
  • FIG. 1 is a cross-sectional configuration diagram of a state in which the shaft member 1 is press-fitted and fixed to the hollow member 3.
  • FIG. 6 is a cross-sectional configuration diagram before the shaft member 1 is inserted into the hollow portion 4 of the hollow member 3.
  • the shaft member 1 has a plurality of spline protrusions 2 formed on the outer peripheral surface 1a.
  • a plurality of spline recesses 5 are formed on the inner peripheral surface of the cylindrical portion 3 a of the hollow member 3.
  • the spline protrusion 2 formed on the outer peripheral surface 1 a of the shaft member 1 is press-fitted into the spline recess 5 formed on the inner peripheral surface 4 a of the cylindrical portion 3 a of the hollow member 3, so that the hollow member 3 is inserted into the shaft member 1. It is press-fitted and fixed.
  • the spline press-fitting of the hollow member 3 into the shaft member 1 is a so-called large-scale insertion in which the tooth surface portion 2 'of the spline protrusion 2 and the tooth bottom portion 5' of the spline recess 5 are press-fitted as shown in FIG. The diameter is press-fitted.
  • the shaft member 1 is made of, for example, a material SCr420H, and as shown in FIG. 3, an oil passage 1b is formed at the center portion and a tooth portion 1c is formed on the outer peripheral side.
  • a plurality of spline protrusions 2 are formed on the outer peripheral surface 1a of the shaft member 1 so as to project along the circumferential direction.
  • Each spline protrusion is composed of a third spline protrusion 2c, a first spline protrusion 2a, and a second spline protrusion 2b.
  • the third spline ridge 2c, the first spline ridge 2a, and the second spline ridge 2b are formed in this order from the press-fitting start end side to the press-fitting rear end side, and the third spline ridge 2c and the first spline are formed.
  • a boundary recess 2e is formed in a groove shape between the protrusions 2a.
  • a boundary recess 2d is also formed in a groove shape between the first spline ridge 2a and the second spline ridge 2b.
  • the diameter D1 of the first spline protrusion 2a is formed to 38.001 mm
  • the diameter D2 of the second spline protrusion 2b is processed to 38.027 mm in this example. Yes.
  • the diameter of the 3rd spline protrusion 2c is processed and formed in the diameter equivalent to the dimension of D1, or a small diameter.
  • the first spline protrusion 2a and the second spline protrusion 2b having different diameters are formed on the outer peripheral surface 1a of the shaft member 1, and the first spline protrusion 2a and the second spline protrusion 2b are Since both are not tapered, they can be easily formed.
  • the hollow member 3 will be described with reference to FIG. 4, which is a cross-sectional configuration diagram showing an outline of the configuration of the hollow member 3, and FIG. 5, which is an enlarged view of a main part of the hollow member 3.
  • the hollow member 3 includes a cylindrical portion 3a, an extended portion 3b that is integrally formed on the outer periphery of the cylindrical portion 3a so as to protrude outward, and teeth that are formed on the outer peripheral side of the extended portion 3b.
  • the material is SCr420H.
  • the cylindrical portion 3a has an inner periphery that is hollow, and a plurality of spline recesses 5 are formed on the inner peripheral surface 4a in the circumferential direction. As shown in FIG.
  • the spline recess 5 has a diameter that gradually increases from the bottom end portion 5 ′ (large spline diameter) toward the press-fitting start end side (right side in FIG. 5) from the press-fit rear end side (left side in FIG. 5).
  • the tooth surface portion 5 '' small spline diameter is formed with a constant inner diameter from the press-fit rear end side (left side in FIG. 5) to the press-fit start end side (right side in FIG. 5). . Details of the method of forming the spline recess 5 in such a shape will be described later.
  • the extending portion 3b is formed at one side in the axial direction of the cylindrical portion 3a, specifically, at a position near the press-fitting rear end side on the left side in FIG. That is, the thickness in the radial direction of the cylindrical portion 3a tends to be thicker at the press-fitting rear end side than at the press-fitting start end side.
  • a method of forming the tooth bottom portion 5 ′ of the spline recess 5 in a tapered shape and forming the tooth surface portion 5 ′′ with a constant diameter will be described.
  • the spline recess 5 is formed by broaching, for example.
  • the inner diameter of the hollow portion 4 in the hollow member 3 is formed to be a value slightly smaller than the required small spline diameter, and the hollow portion 4 formed to have a value slightly smaller than the small spline diameter.
  • the spline groove 5 having the required small spline diameter and large spline diameter (in the embodiment, ⁇ 38.0034 mm) is formed.
  • the hollow member 3 is subjected to a quenching process, for example, carburizing and quenching.
  • the spline concave strip 5 has a tapered shape whose diameter decreases from the press-fitting start end side to the press-fitting rear end side.
  • the diameter of the rear end side of the spline groove 5 was set to be ⁇ 38 mm in the example.
  • the spline recess 5 has a taper of 34 ⁇ m. Then, after carburizing and quenching, machining is performed so that the inner diameter of the tooth surface portion 5 '' of the spline recess 5 becomes constant from the press-fitting start end side to the press-fitting rear end side. An operation when the hollow member 3 is press-fitted into the shaft member 1 thus configured will be described. As shown in FIG. 6, the shaft member 1 and the hollow member 3 are arranged on the same axis CL, and the shaft member 1 and the hollow member 3 are relatively moved along the axis CL, so that the hollow portion 4 of the hollow member 3 is formed. The shaft member 1 is inserted into the inside.
  • the diameter d2 ( ⁇ 38.0034 mm) on the press-fitting start end side of the spline recess 5 of the hollow member 3 is slightly larger than the diameter ( ⁇ ⁇ 38.001 mm) of the third spline protrusion 2c of the shaft member 1, No pressure input is generated at the start.
  • the hollow member 3 is inserted into the shaft member 1 until the diameter of the tapered spline recess 5 and the diameter of the spline protrusions 2a, 2b, 2c of the shaft member 1 are equal.
  • the tooth bottom portion 5 'of the spline recess 5 and the tooth surface portion 2' of any one of the spline protrusions 2a, 2b, 2c come into contact with each other, and pressure input begins to occur.
  • the tooth bottom portion 5 ′ and the tooth surface portion 2 ′ undergo plastic deformation, and the spline press-fitting of the hollow member 3 into the shaft member 1 starts. Thereafter, until the press-fitting start end side of the hollow member 3 reaches the press-fitting rear end side of the shaft member 1, the plastic deformation of the tooth bottom portion 5 ′ and the tooth surface portion 2 ′ is continued at any time. finish.
  • the spline ridge 2 provided on the outer periphery of the shaft member 1 is replaced with the first spline ridge 2a and the first spline on the press-fitting start end side.
  • the spline recess 5 provided on the inner periphery of the hollow member 3 is formed on the inner periphery of the hollow member 3 while being formed in a stepped shape including the second spline protrusion 2b on the press-fit rear end side having a larger diameter than the protrusion 2a.
  • the shaft member of the hollow member 3 is formed by using the heat treatment of the spline recess 5 in the 1 spline protrusion 2a and the press-fitting start end side having a taper shape corresponding to the diameter of the second spline protrusion 2b. Unnecessary press-fitting at the press-fitting start end side of the hollow member 3 and the press-fitting start end side of the shaft member 1 at the start of the spline press-fitting to 1 is avoided.
  • the tapered shape of the spline recess 5 can be easily ensured. As a result, a structure that firmly fixes the hollow member 3 to the shaft member 1 can be easily secured.
  • the tooth bottom portion 5 ′ of the spline recess 5 is formed in a tapered shape from the press-fit rear end side to the press-fit start end side. ' May not be formed in a tapered shape from the press-fitting rear end side to the press-fitting start end side.
  • the tooth bottom portion 50 ′ is formed in a tapered shape from the press-fit rear end side to the substantially central portion in the axial direction of the hollow member 3, and thereafter to the press-fit start end side. May be formed to have a constant diameter.
  • the tooth surface portion 5 '' of the spline recess 5 is processed so as to have a constant diameter from the press-fit rear end side to the press-fit start end side.
  • the tooth surface portion 5 '' may have the same shape as the tooth bottom portion 5 ', that is, may have a tapered shape from the press-fitting end side to the press-fitting start end side.
  • the groove-shaped boundary recess 2d is provided between the first spline protrusion 2a and the second spline protrusion 2b. It does n’t matter.
  • the first spline protrusion 2a and the second spline protrusion 2b may be continuously formed with a step.
  • SYMBOLS 1 Shaft member 1a Outer peripheral surface 2 Spline protrusion 2 'Tooth surface part 2a 1st spline protrusion 2b 2nd spline protrusion 3 Hollow member 3a Cylindrical part 4 Hollow part 5 Spline concave 5' Tooth bottom part 5 '' Tooth surface part

Abstract

Female splines of different diameters are secured by performing heat treatment, and male splines formed on the outer peripheral surface of a shaft member can be press-fitted in the female splines formed on the inner peripheral surface of the hollow portion of a hollow member. The male splines on the outer periphery of the shaft member are configured from first male splines on the press-fit leading side and second male splines on the press-fit trailing side of a greater diameter than that of the first male splines, and the female splines on the inner peripheral surface of the hollow portion of the hollow member are configured from first female splines on the press-fit leading side formed by performing heat treatment and of a diameter corresponding to that of the second male splines, and second female splines on the press-fit trailing side and of a diameter corresponding to that of the first male splines.

Description

結合構造およびスプライン結合体の製造方法Bonding structure and method for manufacturing splined bonded body
　本発明は、結合構造およびスプライン結合体の製造方法に関するものである。 The present invention relates to a joint structure and a method for manufacturing a spline joined body.
　従来、特許文献１に開示されているように、シャフトにおける複数の突条が形成された圧入部の外径を、圧入始端側から圧入後端側に向かうに従い順次テーパー状に拡大するよう形成する一方、円筒部材における孔の内径を、圧入始端側から圧入後端側に向かうに従い順次テーパー状に縮小するよう形成することにより、孔の内周面全体を圧入固定に関与させて、円筒部材のシャフトへの固定を強固にするものがある。 Conventionally, as disclosed in Patent Document 1, the outer diameter of the press-fitted portion formed with a plurality of protrusions on the shaft is formed so as to gradually increase in a tapered shape from the press-fitting start end side toward the press-fitting rear end side. On the other hand, by forming the inner diameter of the hole in the cylindrical member so as to be gradually tapered from the press-fitting start end side toward the press-fitting rear end side, the entire inner peripheral surface of the hole is involved in press-fitting and fixing. There are some that fix the shaft firmly.
特開平１０−２４９４７６号公報JP-A-10-249476
　上記特許文献１に開示されているような結合構造を採用すれば、円筒部材をシャフトに強固に固定することができるものの、スプライン条をテーパー状に加工形成するには困難が伴うという問題点があった。 Although the cylindrical member can be firmly fixed to the shaft by using the coupling structure disclosed in Patent Document 1, there is a problem that it is difficult to process and form the spline strip into a taper shape. there were.
　本発明は、スプライン条をテーパー状に加工形成することなく、軸部材へ中空部材を強固に圧入固定することができる結合構造およびスプライン結合体の製造方法の提供を目的とし、この目的の少なくとも一部を達成するために以下の手段を採った。
　本発明は、軸部材の外周面に形成されたスプライン突条を、中空部材の中空部内周面に形成されたスプライン凹条に圧入させて、前記軸部材へ前記中空部材を圧入固定する結合構造であって、
　前記スプライン突条を、圧入始端側の第１スプライン突条と、該第１スプライン突条よりも大径の圧入後端側の第２スプライン突条で構成し、
　前記スプライン凹条を、熱処理を施すことによって形成された、圧入始端側の前記第２スプライン突条に対応する径の第１スプライン凹条と、圧入後端側の前記第１スプライン突条に対応する径の第２スプライン凹条で構成したことを要旨とする。 An object of the present invention is to provide a coupling structure and a method of manufacturing a spline assembly that can firmly press-fit and fix a hollow member to a shaft member without processing and forming a spline strip into a taper shape. The following measures were taken to achieve the part.
The present invention provides a coupling structure in which a spline protrusion formed on an outer peripheral surface of a shaft member is press-fitted into a spline recess formed on an inner peripheral surface of a hollow portion of the hollow member, and the hollow member is press-fitted and fixed to the shaft member. Because
The spline ridge is composed of a first spline ridge on the press-fitting start end side and a second spline ridge on the press-fit rear end side having a diameter larger than that of the first spline ridge,
Corresponding to the first spline ridges having a diameter corresponding to the second spline ridges on the press-fitting start end side and the first spline ridges on the press-fitting rear end side, which are formed by performing heat treatment on the spline ridges. The gist is that the second spline groove has a diameter.
　スプライン凹条の硬度向上を目的として施す熱処理により生じる熱処理歪みを利用して、第１スプライン突条および第２スプライン突条それぞれに対応する径を有する第２スプライン凹条および第１スプライン凹条を形成するだけだから、径の異なる第２スプライン凹条と第１スプライン凹条を容易に確保することができ、軸部材の外周面に形成された第１スプライン突条に中空部材の中空部内周面に形成された第２スプライン凹条を圧入させ、軸部材の外周面に形成された第２スプライン突条に中空部材の中空部内周面に形成された第１スプライン凹条を圧入させて、軸部材へ中空部材を強固に固定することができる。
　また、本発明の結合構造において、前記中空部材の形状を、前記圧入後端側の方が前記圧入始端側よりも熱変形しやすい形状にしておくことができる。
　こうすれば、中空部材に熱処理を施すことによって、径の異なる第２スプライン凹条と第１スプライン凹条を容易に形成させることができる。
　また、前記中空部材の中空部内周面の外側の径方向肉厚を、前記圧入後端側の方が前記圧入始端側よりも肉厚に形成しておくことができる。
　こうすれば、中空部材に熱処理を施すことにより、肉厚の大なる中空部材の圧入後端側が大きく熱変形し、これにより中空部材の圧入後端側の第２スプライン凹条を小径とし、圧入始端側の第１スプライン凹条を大径に形成させることができる。
　また、前記第１スプライン突条と前記第２スプライン突条とは、前記軸部材の軸方向において隔離して形成しておくことができる。
　こうすれば、径の異なるスプライン突条を簡易に確保できる。
　また、前記第１スプライン突条と前記第２スプライン突条とは、前記軸部材の軸方向において連続して形成しておくことができる。
　こうすれば、径の異なるスプライン突条を簡易に確保できる。
　また、本発明のスプライン結合体の製造方法は、
　回転体のスプライン凹条と軸部材のスプライン突条とをスプライン嵌合して前記回転体を前記軸部材に結合することにより形成されるスプライン結合体の製造方法であって、
　（ａ）前記スプライン突条を、前記軸部材における前記回転体が挿入される挿入方向における前側の第１スプライン突条と、該第１スプライン突条よりも大径に形成されるとともに前記挿入方向の後側の第２スプライン突条とに形成し、
　（ｂ）前記スプライン凹条に熱処理を施すことによって、前記回転体の前記挿入方向における前側に前記第２スプライン突条に対応する径を有する第１スプライン凹条を形成するとともに、前記挿入方向における後側に前記第１スプライン突条に対応する径を有する第２スプライン凹条を形成し、
　（ｃ）前記第１スプライン凹条を前記第２スプライン突条にスプライン嵌合するとともに、前記第２スプライン凹条を前記第１スプライン突条にスプライン嵌合することにより前記回転体が前記軸部材に結合されたスプライン結合体を製造することを要旨とする。
　中空部材のスプライン凹条は、テーパー状に形成することなく、圧入後端側から圧入始端に亘り同径のスプライン凹条を形成させておき、その後に熱処理を施して熱処理歪みを生じさせることにより、径の異なる第２スプライン凹条と第１スプライン凹条を簡易に確保することができる。 A second spline groove and a first spline groove having a diameter corresponding to each of the first spline protrusion and the second spline protrusion by using heat treatment distortion generated by heat treatment applied for the purpose of improving the hardness of the spline groove. Since it is only formed, the second spline groove and the first spline groove having different diameters can be easily secured, and the hollow portion inner peripheral surface of the hollow member is formed on the first spline protrusion formed on the outer peripheral surface of the shaft member. The second spline groove formed on the hollow member is pressed into the second spline protrusion formed on the outer peripheral surface of the shaft member, and the first spline groove formed on the inner peripheral surface of the hollow portion of the hollow member is pressed into the shaft. The hollow member can be firmly fixed to the member.
Further, in the coupling structure of the present invention, the shape of the hollow member can be made to be more easily thermally deformed on the press-fitting rear end side than on the press-fitting start end side.
By so doing, the second spline groove and the first spline groove having different diameters can be easily formed by performing heat treatment on the hollow member.
Further, the radial thickness on the outer side of the inner peripheral surface of the hollow portion of the hollow member can be formed thicker on the press-fitting rear end side than on the press-fitting start end side.
In this way, by subjecting the hollow member to heat treatment, the press-fitted rear end side of the thick hollow member is largely thermally deformed, thereby reducing the diameter of the second spline recess on the press-fitted end side of the hollow member. The first spline groove on the start end side can be formed with a large diameter.
The first spline ridge and the second spline ridge may be formed separately in the axial direction of the shaft member.
In this way, spline protrusions with different diameters can be easily secured.
The first spline ridge and the second spline ridge may be formed continuously in the axial direction of the shaft member.
In this way, spline protrusions with different diameters can be easily secured.
Moreover, the method for producing the spline combined body of the present invention includes:
A spline combined body manufacturing method formed by spline fitting a spline recess of a rotating body and a spline protrusion of a shaft member to couple the rotating body to the shaft member,
(A) The spline ridge is formed with a first spline ridge on the front side in the insertion direction in which the rotating body of the shaft member is inserted, and has a larger diameter than the first spline ridge and the insertion direction. Formed on the rear second spline ridge,
(B) By performing heat treatment on the spline groove, a first spline groove having a diameter corresponding to the second spline protrusion is formed on the front side of the rotating body in the insertion direction, and in the insertion direction. Forming a second spline groove having a diameter corresponding to the first spline protrusion on the rear side;
(C) The first spline groove is spline-fitted with the second spline protrusion, and the second spline groove is spline-fitted with the first spline protrusion, whereby the rotating body is moved to the shaft member. The gist of the present invention is to produce a spline combined body.
The spline groove of the hollow member is not formed into a taper shape, but a spline groove having the same diameter is formed from the press-fitting rear end side to the press-fitting start end, and then heat treatment is performed to cause heat treatment distortion. The second spline groove and the first spline groove having different diameters can be easily secured.
　図１は、中空部材３へ軸部材１を圧入固定した状態の断面構成図である。
　図２は、スプライン突条２の歯面部２’とスプライン凹条５の歯底部５’とが圧入される中空部材３の軸部材１へのスプライン圧入状態の断面構成図である。
　図３は、軸部材１の要部を拡大して示す断面図である。
　図４は、中空部材３の構成の概略を示した断面構成図である。
　図５は、中空部材３の要部を拡大して示す要部拡大図である。
　図６は、軸部材１と中空部材３とを軸線ＣＬに沿って相対移動させ、中空部材３の中空部４内に軸部材１を挿入する状態の断面構成図である。
　図７は、変形例を示す中空部材３の要部の断面拡大構成図である。
　図８は、軸部材１の変更例を示す要部拡大断面構成図である。 FIG. 1 is a cross-sectional configuration diagram of a state in which the shaft member 1 is press-fitted and fixed to the hollow member 3.
FIG. 2 is a cross-sectional configuration diagram of the spline press-fitted state of the hollow member 3 into the shaft member 1 into which the tooth surface portion 2 ′ of the spline protrusion 2 and the tooth bottom portion 5 ′ of the spline recess 5 are press-fitted.
FIG. 3 is an enlarged cross-sectional view showing a main part of the shaft member 1.
FIG. 4 is a cross-sectional configuration diagram showing an outline of the configuration of the hollow member 3.
FIG. 5 is an enlarged view showing a main part of the hollow member 3 in an enlarged manner.
FIG. 6 is a cross-sectional configuration diagram illustrating a state in which the shaft member 1 and the hollow member 3 are relatively moved along the axis line CL and the shaft member 1 is inserted into the hollow portion 4 of the hollow member 3.
FIG. 7 is an enlarged cross-sectional configuration diagram of the main part of the hollow member 3 showing a modification.
FIG. 8 is an enlarged cross-sectional configuration diagram of a main part showing a modified example of the shaft member 1.
　次に、本発明を実施するための形態を実施例を用いて説明する。
　図１は、中空部材３へ軸部材１を圧入固定した状態の断面構成図である。なお、図６は、中空部材３の中空部４内に軸部材１を挿入する前の断面構成図である。
　軸部材１は、外周面１ａに複数のスプライン突条２が形成されている。一方、中空部材３の円筒部３ａの内周面には複数のスプライン凹条５が形成されている。
　軸部材１の外周面１ａに形成されたスプライン突条２を、中空部材３の円筒部３ａの内周面４ａに形成されたスプライン凹条５に圧入させて、軸部材１へ中空部材３が圧入固定される。
　なお、中空部材３の軸部材１へのスプライン圧入は、図２に示すように、スプライン突条２の歯面部２’とスプライン凹条５の歯底部５’とが圧入される、所謂、大径圧入となっている。
　先ず、軸部材１について、軸部材１の要部を拡大した断面図である図３を用いて説明する。
　軸部材１は、例えば材質ＳＣｒ４２０Ｈで形成されており、図３に示すように、中心部に油路１ｂが形成されているとともに外周側に歯部１ｃが形成されている。
　軸部材１の外周面１ａには、周方向に沿って複数のスプライン突条２が突出状に加工形成されている。
　各スプライン突条は、第３スプライン突条２ｃ，第１スプライン突条２ａ，第２スプライン突条２ｂで構成されている。即ち、圧入始端側から圧入後端側に向かって第３スプライン突条２ｃ，第１スプライン突条２ａ，第２スプライン突条２ｂの順に形成されており、第３スプライン突条２ｃと第１スプライン突条２ａ間には溝状に境界凹部２ｅが形成されている。また、第１スプライン突条２ａと第２スプライン突条２ｂ間にも溝状に境界凹部２ｄが形成されている。
　第１スプライン突条２ａの直径Ｄ１は、本例では、例えば３８．００１ｍｍに加工形成されており、また、第２スプライン突条２ｂの直径Ｄ２は、本例では３８．０２７ｍｍに加工形成されている。なお、第３スプライン突条２ｃの直径は、Ｄ１の寸法と同等あるいは小さい径に加工形成されている。
　このように軸部材１の外周面１ａには、直径の異なる第１スプライン突条２ａと第２スプライン突条２ｂが形成されており、この第１スプライン突条２ａおよび第２スプライン突条２ｂは共にテーパー状のものではないため、容易に加工形成することができる。
　次に、中空部材３について、中空部材３の構成の概略を示した断面構成図である図４および中空部材３の要部を拡大して示す要部拡大図である図５を用いて説明する。
　中空部材３は、図４に示すように、円筒部３ａと、円筒部３ａの外周に外側へ一体状に突出形成された延出部３ｂと、延出部３ｂの外周側に形成された歯部３ｃとから構成されており、材質は軸部材１と同様、ＳＣｒ４２０Ｈである。
　円筒部３ａは、内周が中空に形成されており、内周面４ａには周方向に複数のスプライン凹条５が加工形成されている。
　スプライン凹条５は、図５に示すように、歯底部５’（スプライン大径）が圧入後端側（図５の左側）から圧入始端側（図５の右側）に向かって順次径が拡大するテーパー状に形成されており、歯面部５’’（スプライン小径）が圧入後端側（図５の左側）から圧入始端側（図５の右側）に亘って一定の内径に形成されている。スプライン凹条５をこのような形状に形成する方法についての詳細は後述する。
　延出部３ｂは、円筒部３ａの軸方向の一方側、具体的には、図４の左側の圧入後端側寄りの片寄った位置に形成されている。即ち、円筒部３ａの径方向における肉厚は、圧入後端側の方が圧入始端側に比較して肉厚な傾向となっている。
　ここで、スプライン凹条５の歯底部５’をテーパー状に形成するとともに歯面部５’’を一定の径に形成する方法について説明する。
　スプライン凹条５は、例えば、ブローチ加工により形成される。
　具体的には、先ず、中空部材３における中空部４の内径を、要求されるスプライン小径よりも若干小さな値となるように形成し、スプライン小径よりも若干小さな値に形成された中空部４内にブローチ刃を挿入することにより、要求されるスプライン小径およびスプライン大径（実施例では、φ３８．００３４ｍｍ）を有するスプライン凹条５を形成する。
　次に、スプライン凹条５の耐久性を向上するために中空部材３に焼入れ処理、例えば、浸炭焼入れを施す。このとき、中空部材３における円筒部３ａの径方向における肉厚が、圧入後端側が圧入始端側に比較して肉厚な傾向となっているため、圧入後端側において熱収縮が生じる。
　即ち、スプライン凹条５の圧入後端側の径が小さくなる方向の熱変形が生じる。この結果、スプライン凹条５は、圧入始端側から圧入後端側にかけて径が縮小するテーパー形状となる。ここで、スプライン凹条５の後端側の径は、実施例では、φ３８ｍｍとなるように設定した。即ち、スプライン凹条５は３４μｍのテーパーを有している。
　そして、浸炭焼入れ後にスプライン凹条５の歯面部５’’の内径が圧入始端側から圧入後端側にかけて一定となるよう加工を入れる。
　こうして構成された軸部材１に中空部材３をスプライン圧入する際の動作について説明する。
　軸部材１と中空部材３とを図６に示すように、同一軸線ＣＬ上に配置するとともに、軸部材１と中空部材３とを軸線ＣＬに沿って相対移動させ、中空部材３の中空部４内に軸部材１を挿入する。
　このとき、中空部材３のスプライン凹条５の圧入始端側の径ｄ２（φ３８．００３４ｍｍ）が軸部材１の第３スプライン突条２ｃの径（≦φ３８．００１ｍｍ）よりも僅かに大きいから、挿入開始時点では圧入力は発生しない。
　そして、テーパー状に形成されたスプライン凹条５の径と、軸部材１のスプライン突条２ａ，２ｂ，２ｃの径のいずれかとが等しくなる位置まで、中空部材３が軸部材１に挿入された時点で、スプライン凹条５の歯底部５’とスプライン突条２ａ，２ｂ，２ｃいずれかの歯面部２’とが接触して圧入力が生じ始める。
　更に、中空部材３を軸部材１へ挿入し続けると、歯底部５’および歯面部２’が塑性変形を生じ、中空部材３の軸部材１へのスプライン圧入が開始する。以降、中空部材３の圧入始端側が軸部材１の圧入後端側に達するまで、随時歯底部５’および歯面部２’の塑性変形が継続され、中空部材３の軸部材１へのスプライン圧入が終了する。
　以上説明した実施例の軸部材１への中空部材３の圧入固定構造によれば、軸部材１の外周に設けたスプライン突条２を、圧入始端側の第１スプライン突条２ａおよび第１スプライン突条２ａよりも径の大きい圧入後端側の第２スプライン突条２ｂとからなる段差状に形成するとともに、中空部材３の内周に設けたスプライン凹条５を、圧入後端側は第１スプライン突条２ａに、圧入始端側は第２スプライン突条２ｂにそれぞれ対応する径となるようなテーパー形状に、スプライン凹条５の熱処理を利用して形成するから、中空部材３の軸部材１へのスプライン圧入開始時における中空部材３の圧入始端側と軸部材１の圧入始端側とにおける不要な圧入を回避できる。即ち、スプライン凹条５の圧入始端側やスプライン突条２の圧入始端側（第１，３スプライン突条２ａ，２ｃ）における不要な削れや変形を抑制できる。
　また、スプライン凹条５の圧入後端側が第１スプライン突条２ａに対応し、スプライン凹条５の圧入始端側が第２スプライン突条２ｂに対応しているから、中空部材３の軸部材１へのスプライン圧入完了時には、強固なスプライン圧入を達成することができる。しかも、スプライン凹条５の耐久性向上を目的として施す熱処理により生じる熱処理歪を利用するだけだから、スプライン凹条５のテーパー形状を容易に確保することができる。この結果、中空部材３を軸部材１に強固に固定する構造を簡易に確保することができる。
　実施例の軸部材への中空部材の圧入固定構造では、スプライン凹条５の歯底部５’は、圧入後端側から圧入始端側に亘ってテーパー形状に形成するものとしたが、歯底部５’は、圧入後端側から圧入始端側全てに亘ってテーパー形状に形成しなくても構わない。例えば、図７の変形例のスプライン凹条５０に例示するように、歯底部５０’は圧入後端側から中空部材３の軸方向ほぼ中央部までをテーパー形状に形成し、以降圧入始端側までは一定の径に形成するものとしても構わない。
　また、実施例の軸部材への中空部材の圧入固定構造では、スプライン凹条５の歯面部５’’は、圧入後端側から圧入始端側まで一定の径となるよう加工を入れるものとしたが、歯面部５’’は歯底部５’と同形状、即ち、圧入後端側から圧入始端側に亘ってテーパー形状に形成されていても差し支えない。
　実施例の軸部材への中空部材の圧入固定構造では、第１スプライン突条２ａと第２スプライン突条２ｂとの間には、溝状の境界凹部２ｄを設けるものとしたが、境界凹部２ｄはなくても構わない。例えば、図８の変形例のスプライン突条２０に例示するように、第１スプライン突条２ａと第２スプライン突条２ｂとは段差をもって連続形成するものとしても良い。 Next, the form for implementing this invention is demonstrated using an Example.
FIG. 1 is a cross-sectional configuration diagram of a state in which the shaft member 1 is press-fitted and fixed to the hollow member 3. FIG. 6 is a cross-sectional configuration diagram before the shaft member 1 is inserted into the hollow portion 4 of the hollow member 3.
The shaft member 1 has a plurality of spline protrusions 2 formed on the outer peripheral surface 1a. On the other hand, a plurality of spline recesses 5 are formed on the inner peripheral surface of the cylindrical portion 3 a of the hollow member 3.
The spline protrusion 2 formed on the outer peripheral surface 1 a of the shaft member 1 is press-fitted into the spline recess 5 formed on the inner peripheral surface 4 a of the cylindrical portion 3 a of the hollow member 3, so that the hollow member 3 is inserted into the shaft member 1. It is press-fitted and fixed.
Note that the spline press-fitting of the hollow member 3 into the shaft member 1 is a so-called large-scale insertion in which the tooth surface portion 2 'of the spline protrusion 2 and the tooth bottom portion 5' of the spline recess 5 are press-fitted as shown in FIG. The diameter is press-fitted.
First, the shaft member 1 will be described with reference to FIG.
The shaft member 1 is made of, for example, a material SCr420H, and as shown in FIG. 3, an oil passage 1b is formed at the center portion and a tooth portion 1c is formed on the outer peripheral side.
A plurality of spline protrusions 2 are formed on the outer peripheral surface 1a of the shaft member 1 so as to project along the circumferential direction.
Each spline protrusion is composed of a third spline protrusion 2c, a first spline protrusion 2a, and a second spline protrusion 2b. That is, the third spline ridge 2c, the first spline ridge 2a, and the second spline ridge 2b are formed in this order from the press-fitting start end side to the press-fitting rear end side, and the third spline ridge 2c and the first spline are formed. A boundary recess 2e is formed in a groove shape between the protrusions 2a. A boundary recess 2d is also formed in a groove shape between the first spline ridge 2a and the second spline ridge 2b.
In this example, the diameter D1 of the first spline protrusion 2a is formed to 38.001 mm, and the diameter D2 of the second spline protrusion 2b is processed to 38.027 mm in this example. Yes. In addition, the diameter of the 3rd spline protrusion 2c is processed and formed in the diameter equivalent to the dimension of D1, or a small diameter.
As described above, the first spline protrusion 2a and the second spline protrusion 2b having different diameters are formed on the outer peripheral surface 1a of the shaft member 1, and the first spline protrusion 2a and the second spline protrusion 2b are Since both are not tapered, they can be easily formed.
Next, the hollow member 3 will be described with reference to FIG. 4, which is a cross-sectional configuration diagram showing an outline of the configuration of the hollow member 3, and FIG. 5, which is an enlarged view of a main part of the hollow member 3. .
As shown in FIG. 4, the hollow member 3 includes a cylindrical portion 3a, an extended portion 3b that is integrally formed on the outer periphery of the cylindrical portion 3a so as to protrude outward, and teeth that are formed on the outer peripheral side of the extended portion 3b. Like the shaft member 1, the material is SCr420H.
The cylindrical portion 3a has an inner periphery that is hollow, and a plurality of spline recesses 5 are formed on the inner peripheral surface 4a in the circumferential direction.
As shown in FIG. 5, the spline recess 5 has a diameter that gradually increases from the bottom end portion 5 ′ (large spline diameter) toward the press-fitting start end side (right side in FIG. 5) from the press-fit rear end side (left side in FIG. 5). The tooth surface portion 5 '' (small spline diameter) is formed with a constant inner diameter from the press-fit rear end side (left side in FIG. 5) to the press-fit start end side (right side in FIG. 5). . Details of the method of forming the spline recess 5 in such a shape will be described later.
The extending portion 3b is formed at one side in the axial direction of the cylindrical portion 3a, specifically, at a position near the press-fitting rear end side on the left side in FIG. That is, the thickness in the radial direction of the cylindrical portion 3a tends to be thicker at the press-fitting rear end side than at the press-fitting start end side.
Here, a method of forming the tooth bottom portion 5 ′ of the spline recess 5 in a tapered shape and forming the tooth surface portion 5 ″ with a constant diameter will be described.
The spline recess 5 is formed by broaching, for example.
Specifically, first, the inner diameter of the hollow portion 4 in the hollow member 3 is formed to be a value slightly smaller than the required small spline diameter, and the hollow portion 4 formed to have a value slightly smaller than the small spline diameter. By inserting the broaching blade into the spline, the spline groove 5 having the required small spline diameter and large spline diameter (in the embodiment, φ38.0034 mm) is formed.
Next, in order to improve the durability of the spline recess 5, the hollow member 3 is subjected to a quenching process, for example, carburizing and quenching. At this time, since the thickness in the radial direction of the cylindrical portion 3a in the hollow member 3 tends to be thicker on the press-fitting rear end side than on the press-fitting start end side, heat shrinkage occurs on the press-fitting rear end side.
That is, thermal deformation occurs in a direction in which the diameter of the spline recess 5 on the end side after press-fitting is reduced. As a result, the spline concave strip 5 has a tapered shape whose diameter decreases from the press-fitting start end side to the press-fitting rear end side. Here, the diameter of the rear end side of the spline groove 5 was set to be φ38 mm in the example. That is, the spline recess 5 has a taper of 34 μm.
Then, after carburizing and quenching, machining is performed so that the inner diameter of the tooth surface portion 5 '' of the spline recess 5 becomes constant from the press-fitting start end side to the press-fitting rear end side.
An operation when the hollow member 3 is press-fitted into the shaft member 1 thus configured will be described.
As shown in FIG. 6, the shaft member 1 and the hollow member 3 are arranged on the same axis CL, and the shaft member 1 and the hollow member 3 are relatively moved along the axis CL, so that the hollow portion 4 of the hollow member 3 is formed. The shaft member 1 is inserted into the inside.
At this time, the diameter d2 (φ38.0034 mm) on the press-fitting start end side of the spline recess 5 of the hollow member 3 is slightly larger than the diameter (≦ φ38.001 mm) of the third spline protrusion 2c of the shaft member 1, No pressure input is generated at the start.
The hollow member 3 is inserted into the shaft member 1 until the diameter of the tapered spline recess 5 and the diameter of the spline protrusions 2a, 2b, 2c of the shaft member 1 are equal. At the time, the tooth bottom portion 5 'of the spline recess 5 and the tooth surface portion 2' of any one of the spline protrusions 2a, 2b, 2c come into contact with each other, and pressure input begins to occur.
Further, when the hollow member 3 is continuously inserted into the shaft member 1, the tooth bottom portion 5 ′ and the tooth surface portion 2 ′ undergo plastic deformation, and the spline press-fitting of the hollow member 3 into the shaft member 1 starts. Thereafter, until the press-fitting start end side of the hollow member 3 reaches the press-fitting rear end side of the shaft member 1, the plastic deformation of the tooth bottom portion 5 ′ and the tooth surface portion 2 ′ is continued at any time. finish.
According to the press-fitting and fixing structure of the hollow member 3 to the shaft member 1 of the embodiment described above, the spline ridge 2 provided on the outer periphery of the shaft member 1 is replaced with the first spline ridge 2a and the first spline on the press-fitting start end side. The spline recess 5 provided on the inner periphery of the hollow member 3 is formed on the inner periphery of the hollow member 3 while being formed in a stepped shape including the second spline protrusion 2b on the press-fit rear end side having a larger diameter than the protrusion 2a. The shaft member of the hollow member 3 is formed by using the heat treatment of the spline recess 5 in the 1 spline protrusion 2a and the press-fitting start end side having a taper shape corresponding to the diameter of the second spline protrusion 2b. Unnecessary press-fitting at the press-fitting start end side of the hollow member 3 and the press-fitting start end side of the shaft member 1 at the start of the spline press-fitting to 1 is avoided. That is, unnecessary shaving and deformation on the press-fitting start end side of the spline recess 5 and the press-fitting start end side of the spline protrusion 2 (first and third spline protrusions 2a and 2c) can be suppressed.
Moreover, since the press-fitting rear end side of the spline recess 5 corresponds to the first spline protrusion 2a and the press-fitting start end side of the spline recess 5 corresponds to the second spline protrusion 2b, the shaft member 1 of the hollow member 3 is moved to. When the spline press-fitting is complete, strong spline press-fitting can be achieved. In addition, since only the heat treatment strain generated by the heat treatment applied for the purpose of improving the durability of the spline recess 5 is used, the tapered shape of the spline recess 5 can be easily ensured. As a result, a structure that firmly fixes the hollow member 3 to the shaft member 1 can be easily secured.
In the press-fitting and fixing structure of the hollow member to the shaft member of the embodiment, the tooth bottom portion 5 ′ of the spline recess 5 is formed in a tapered shape from the press-fit rear end side to the press-fit start end side. 'May not be formed in a tapered shape from the press-fitting rear end side to the press-fitting start end side. For example, as illustrated in the spline recess 50 of the modification of FIG. 7, the tooth bottom portion 50 ′ is formed in a tapered shape from the press-fit rear end side to the substantially central portion in the axial direction of the hollow member 3, and thereafter to the press-fit start end side. May be formed to have a constant diameter.
Further, in the press-fitting and fixing structure of the hollow member to the shaft member of the embodiment, the tooth surface portion 5 '' of the spline recess 5 is processed so as to have a constant diameter from the press-fit rear end side to the press-fit start end side. However, the tooth surface portion 5 '' may have the same shape as the tooth bottom portion 5 ', that is, may have a tapered shape from the press-fitting end side to the press-fitting start end side.
In the press-fitting and fixing structure of the hollow member to the shaft member of the embodiment, the groove-shaped boundary recess 2d is provided between the first spline protrusion 2a and the second spline protrusion 2b. It does n’t matter. For example, as illustrated in the spline protrusion 20 of the modified example of FIG. 8, the first spline protrusion 2a and the second spline protrusion 2b may be continuously formed with a step.
　１　軸部材
　１ａ　外周面
　２　スプライン突条
　２’　歯面部
　２ａ　第１スプライン突条
　２ｂ　第２スプライン突条
　３　中空部材
　３ａ　円筒部
　４　中空部
　５　スプライン凹条
　５’　歯底部
　５’’　歯面部 DESCRIPTION OF SYMBOLS 1 Shaft member 1a Outer peripheral surface 2 Spline protrusion 2 'Tooth surface part 2a 1st spline protrusion 2b 2nd spline protrusion 3 Hollow member 3a Cylindrical part 4 Hollow part 5 Spline concave 5' Tooth bottom part 5 '' Tooth surface part

Claims (6)

  1. 　軸部材の外周面に形成されたスプライン突条を、中空部材の中空部内周面に形成されたスプライン凹条に圧入させて、前記軸部材へ前記中空部材を圧入固定する結合構造であって、
    　前記スプライン突条を、圧入始端側の第１スプライン突条と、該第１スプライン突条よりも大径の圧入後端側の第２スプライン突条で構成し、
    　前記スプライン凹条を、熱処理を施すことによって形成された、圧入始端側の前記第２スプライン突条に対応する径の第１スプライン凹条と、圧入後端側の前記第１スプライン突条に対応する径の第２スプライン凹条で構成した
    　ことを特徴とする結合構造。     A spline protrusion formed on the outer peripheral surface of the shaft member is press-fitted into a spline recess formed on the inner peripheral surface of the hollow portion of the hollow member, and the hollow member is press-fitted and fixed to the shaft member,
    The spline ridge is composed of a first spline ridge on the press-fitting start end side and a second spline ridge on the press-fit rear end side having a diameter larger than that of the first spline ridge,
    Corresponding to the first spline ridges having a diameter corresponding to the second spline ridges on the press-fitting start end side and the first spline ridges on the press-fitting rear end side, which are formed by performing heat treatment on the spline ridges. A coupling structure characterized by comprising a second spline groove with a diameter.
  2. 　前記中空部材の形状を、前記圧入後端側の方が前記圧入始端側よりも熱変形しやすい形状とした請求項１に記載の結合構造。 The coupling structure according to claim 1, wherein the shape of the hollow member is such that the rear end side of the press fit is more easily thermally deformed than the start end side of the press fit.
  3. 　前記中空部材の中空部内周面の外側の径方向肉厚を、前記圧入後端側の方が前記圧入始端側よりも肉厚に形成した請求項２に記載の結合構造。 3. The coupling structure according to claim 2, wherein the radial thickness on the outside of the inner peripheral surface of the hollow part of the hollow member is formed thicker at the press-fitting rear end side than at the press-fitting start end side.
  4. 　前記第１スプライン突条と前記第２スプライン突条とは、前記軸部材の軸方向において隔離して形成されてなる請求項１ないし３いずれか記載の結合構造。 The coupling structure according to any one of claims 1 to 3, wherein the first spline protrusion and the second spline protrusion are formed separately in the axial direction of the shaft member.
  5. 　前記第１スプライン突条と前記第２スプライン突条とは、前記軸部材の軸方向において連続して形成されてなる請求項１ないし３いずれか記載の結合構造。 The coupling structure according to any one of claims 1 to 3, wherein the first spline ridge and the second spline ridge are formed continuously in an axial direction of the shaft member.
  6. 　回転体のスプライン凹条と軸部材のスプライン突条とをスプライン嵌合して前記回転体を前記軸部材に結合することにより形成されるスプライン結合体の製造方法であって、
    　（ａ）前記スプライン突条を、前記軸部材における前記回転体が挿入される挿入方向における前側の第１スプライン突条と、該第１スプライン突条よりも大径に形成されるとともに前記挿入方向の後側の第２スプライン突条とに形成し、
    　（ｂ）前記スプライン凹条に熱処理を施すことによって、前記回転体の前記挿入方向における前側に前記第２スプライン突条に対応する径を有する第１スプライン凹条を形成するとともに、前記挿入方向における後側に前記第１スプライン突条に対応する径を有する第２スプライン凹条を形成し、
    　（ｃ）前記第１スプライン凹条を前記第２スプライン突条にスプライン嵌合するとともに、前記第２スプライン凹条を前記第１スプライン突条にスプライン嵌合することにより前記回転体が前記軸部材に結合されたスプライン結合体を製造する
    　スプライン結合体の製造方法。     A spline combined body manufacturing method formed by spline fitting a spline recess of a rotating body and a spline protrusion of a shaft member to couple the rotating body to the shaft member,
    (A) The spline ridge is formed with a first spline ridge on the front side in the insertion direction in which the rotating body of the shaft member is inserted, and has a larger diameter than the first spline ridge and the insertion direction. Formed on the rear second spline ridge,
    (B) By performing heat treatment on the spline groove, a first spline groove having a diameter corresponding to the second spline protrusion is formed on the front side of the rotating body in the insertion direction, and in the insertion direction. Forming a second spline groove having a diameter corresponding to the first spline protrusion on the rear side;
    (C) The first spline groove is spline-fitted with the second spline protrusion, and the second spline groove is spline-fitted with the first spline protrusion, whereby the rotating body is moved to the shaft member. A method of manufacturing a spline combined body is manufactured.
PCT/JP2012/073549 2012-09-06 2012-09-06 Coupling structure and manufacturing method of spline coupler WO2014038096A1 (en)

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WO2020150042A1 (en) * 2019-01-14 2020-07-23 Schaeffler Technologies AG & Co. KG Planetary drive assembly and method of connecting a planet carrier to a splined part
JP7000848B2 (en) 2017-12-26 2022-01-19 日本精工株式会社 Linear actuator
US11525482B2 (en) * 2018-04-27 2022-12-13 Bayerische Motoren Werke Aktiengesellschaft Method for producing a shaft-hub connection, and motor vehicle shaft having such a connection

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JP2008095950A (en) * 2006-09-15 2008-04-24 Aichi Mach Ind Co Ltd Rotating member fixing structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015200842A1 (en) * 2015-01-20 2016-07-21 Zf Friedrichshafen Ag Shaft-hub composite, gearbox and motor vehicle
JP7000848B2 (en) 2017-12-26 2022-01-19 日本精工株式会社 Linear actuator
US11525482B2 (en) * 2018-04-27 2022-12-13 Bayerische Motoren Werke Aktiengesellschaft Method for producing a shaft-hub connection, and motor vehicle shaft having such a connection
WO2020150042A1 (en) * 2019-01-14 2020-07-23 Schaeffler Technologies AG & Co. KG Planetary drive assembly and method of connecting a planet carrier to a splined part
US10989294B2 (en) 2019-01-14 2021-04-27 Schaeffler Technologies AG & Co. KG Planetary drive assembly and method of connecting a planet carrier to a splined part

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