JP2009008174A - Joining structure of steering shaft and yoke - Google Patents

Joining structure of steering shaft and yoke Download PDF

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Publication number
JP2009008174A
JP2009008174A JP2007170360A JP2007170360A JP2009008174A JP 2009008174 A JP2009008174 A JP 2009008174A JP 2007170360 A JP2007170360 A JP 2007170360A JP 2007170360 A JP2007170360 A JP 2007170360A JP 2009008174 A JP2009008174 A JP 2009008174A
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Japan
Prior art keywords
yoke
bolt
hole
female screw
bolt hole
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JP2007170360A
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Japanese (ja)
Inventor
Minoru Ishijima
実 石島
Takahiro Matsui
隆浩 松井
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007170360A priority Critical patent/JP2009008174A/en
Publication of JP2009008174A publication Critical patent/JP2009008174A/en
Withdrawn legal-status Critical Current

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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
    • F16D1/08—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 with clamping hub; with hub and longitudinal key
    • F16D1/0852—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 with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • F16D1/0864—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 with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to tangential loading of the hub, e.g. a split hub
    • 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
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/387—Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
    • 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
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
    • 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
    • F16D2003/22323—Attachments to the shaft of the inner joint member whereby the attachments are distanced from the core
    • 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
    • F16D2003/22326—Attachments to the outer joint member, i.e. attachments to the exterior of the outer joint member or to the shaft of the outer joint member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining structure of a steering shaft and a yoke reducing bending stress of a yoke bolt. <P>SOLUTION: An axis of an internal screw hole 8 is kept perpendicular to a flat surface including a seat surface 7 and an air gap part G is formed keeping the yoke bolt 5 not in touch with an inner circumference surface of a bolt hole 6b of a projection part 4b, under a condition where a pair of projection part 4a, 4b of the yokes 1 are fastened by the yoke bolt 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、自動車のステアリングシャフトとヨークの結合構造に関する。   The present invention relates to a coupling structure of a steering shaft and a yoke of an automobile.

自動車のステアリング装置に使用される自在継手として、図４に示す十字ジョイントや、図５に示す固定式等速自在継手がある。後者はボールフィックスドジョイントとも称される（以下「ＢＪ」と略す）。これらジョイントは、通例、ヨーク１と称されるステアリングシャフトとの結合部分を有する。   As a universal joint used in an automobile steering device, there are a cross joint shown in FIG. 4 and a fixed constant velocity universal joint shown in FIG. The latter is also called a ball-fixed joint (hereinafter abbreviated as “BJ”). These joints typically have a coupling portion with a steering shaft called the yoke 1.

ヨーク１は、図６（Ａ）の縦断面図に示すように、ステアリングシャフト（図示省略）を挿入可能な割り入りのボス部２を有する。ボス部２の割り形成箇所の周方向両側に、一対の突出部４が隙間３を介在して径方向外方に突出する。一対の突出部４には、ヨークボルト５を挿通するためのボルト孔６がそれぞれ形成される。一方の突出部４のボルト孔６に、ヨークボルト５が螺合する雌ねじ孔８が形成される。他方の突出部４のボルト孔６の開口端に、ヨークボルト５の頭部が着座する座部７が形成される。両方のボルト孔６と雌ねじ孔８の各軸線は同一線上にあり、かつ座部７を含む平面に対して直交する。   As shown in the longitudinal sectional view of FIG. 6A, the yoke 1 has an interrupted boss portion 2 into which a steering shaft (not shown) can be inserted. On both sides in the circumferential direction of the split formation portion of the boss portion 2, a pair of projecting portions 4 project radially outward through a gap 3. Bolt holes 6 for inserting the yoke bolts 5 are formed in the pair of protrusions 4, respectively. A female screw hole 8 into which the yoke bolt 5 is screwed is formed in the bolt hole 6 of one protrusion 4. A seat 7 on which the head of the yoke bolt 5 is seated is formed at the open end of the bolt hole 6 of the other protrusion 4. The axes of both the bolt holes 6 and the female screw holes 8 are on the same line and are orthogonal to the plane including the seat portion 7.

図６（Ｂ）に示すように、ボルト孔６に挿通させたヨークボルト５を雌ねじ孔８に螺合して締め上げると、一対の突出部４間の隙間３が狭まる。これにより、ボス部２を縮径させる方向にヨーク１が弾性変形し、ボス部２に挿入したステアリングシャフトが締付けられて固定される（特許文献１参照）。
特開２００５−０３６８６５号公報 As shown in FIG. 6B, when the yoke bolt 5 inserted through the bolt hole 6 is screwed into the female screw hole 8 and tightened, the gap 3 between the pair of projecting portions 4 is narrowed. As a result, the yoke 1 is elastically deformed in the direction in which the diameter of the boss portion 2 is reduced, and the steering shaft inserted into the boss portion 2 is fastened and fixed (see Patent Document 1).
JP 2005-036865 A

図６（Ｂ）に示すように、ボルト孔６に挿通したヨークボルト５を締め上げた状態では、ヨーク１の変形により、座部７を含む平面を通る垂線に対して、ヨークボルト５の軸線ないし雌ねじ孔８の軸線が傾斜し、ヨークボルト５に曲げ応力が作用する。詳しくは、ヨークボルト５の頭部が着座する座部７の外周縁周辺Ｃ１において、ヨークボルト５の頭部が片当たりすることにより、ヨークボルト５に対し曲げ応力が作用する。また、ヨークボルト５が座部７におけるボルト孔６の開口縁周辺Ｃ２に接触した場合にも、ヨークボルト５に対し曲げ応力が作用する。ヨークボルト５の軸線ないし雌ねじ孔８の軸線の前記傾斜角が大きくなると、過大な曲げ応力がヨークボルト５に作用するおそれがある。   As shown in FIG. 6B, in a state where the yoke bolt 5 inserted through the bolt hole 6 is tightened, the axis of the yoke bolt 5 with respect to a perpendicular passing through the plane including the seat portion 7 due to deformation of the yoke 1. In addition, the axis of the female screw hole 8 is inclined, and a bending stress acts on the yoke bolt 5. Specifically, a bending stress acts on the yoke bolt 5 when the head of the yoke bolt 5 comes into contact with one side in the peripheral edge periphery C1 of the seat 7 on which the head of the yoke bolt 5 sits. Also, when the yoke bolt 5 comes into contact with the periphery C2 of the opening edge of the bolt hole 6 in the seat portion 7, a bending stress acts on the yoke bolt 5. If the inclination angle of the axis of the yoke bolt 5 or the axis of the female screw hole 8 is increased, an excessive bending stress may act on the yoke bolt 5.

本発明は、上記事情に鑑み、ヨークボルトに対する曲げ応力を低減したステアリングシャフトとヨークの結合構造を提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide a coupling structure of a steering shaft and a yoke in which bending stress on the yoke bolt is reduced.

前記課題を解決するため、請求項１の発明は、ステアリングシャフトと、前記ステアリングシャフトの一端部を挿入可能なボス部を備えたヨークの結合構造であって、前記ヨークは前記ボス部の径方向外方に突出すると共に前記ボス部の軸線と直角方向にヨークボルトを挿通するためのボルト孔が貫設された一対の突出部を備え、前記一対の突出部のうちの一方の突出部のボルト孔に前記ヨークボルトが螺合する雌ねじ孔を設けると共に、他方の突出部のボルト孔の開口の周囲に前記ヨークボルトの頭部が着座する座部を形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げた状態において、前記座部を含む平面に対して前記雌ねじ孔の軸線を直交させると共に、前記他方の突出部のボルト孔の内周面に対して前記ヨークボルトを非接触とする空隙部を形成したことを特徴とする。   In order to solve the above-mentioned problems, the invention of claim 1 is a coupling structure of a yoke having a steering shaft and a boss portion into which one end portion of the steering shaft can be inserted, wherein the yoke is in the radial direction of the boss portion. A pair of projecting portions projecting outward and having a bolt hole through which a yoke bolt is inserted in a direction perpendicular to the axis of the boss portion; and a bolt of one projecting portion of the pair of projecting portions A female screw hole into which the yoke bolt is screwed is formed in the hole, and a seat portion on which the head of the yoke bolt is seated is formed around the opening of the bolt hole of the other protruding portion. In the state where the projecting portion of the other projecting portion is tightened, the axis of the female screw hole is perpendicular to the plane including the seat portion, and the yoke bolt is configured to the inner peripheral surface of the bolt hole of the other projecting portion. Characterized in that the formation of the void portion to contact with each other.

ここで「直角」とは、厳密に９０°の角度だけでなく、誤差等に起因して僅かに９０°と相違するが実質的に９０°とみなせる角度も含む。また、「直交」とは、厳密に９０°の交差角だけでなく、誤差等に起因して僅かに９０°と相違するが実質的に９０°とみなせる角度も含む。   Here, the term “right angle” includes not only strictly an angle of 90 ° but also an angle that is slightly different from 90 ° due to an error or the like but can be regarded as substantially 90 °. The term “orthogonal” includes not only strictly 90 ° crossing angle but also an angle that is slightly different from 90 ° due to errors or the like but can be regarded as substantially 90 °.

以上の構成によれば、ヨークボルトでヨークの一対の突出部を締め上げた状態において、ヨークボルトが座部に片当たりせず、かつ、他方の突出部のボルト孔の内周面に非接触となるため、ヨークボルトの曲げ応力が低減される。これにより、ヨーク及びヨークボルトの強度が向上すると共に、ヨークボルトによるヨークの締め付け動作ひいてはステアリングシャフトの締め付け動作が安定し、弛み等の不具合が生じ難くなる。   According to the above configuration, in a state where the pair of projecting portions of the yoke is tightened with the yoke bolt, the yoke bolt does not come into contact with the seat portion and is not in contact with the inner peripheral surface of the bolt hole of the other projecting portion. Therefore, the bending stress of the yoke bolt is reduced. As a result, the strength of the yoke and the yoke bolt is improved, and the tightening operation of the yoke by the yoke bolt, and thus the tightening operation of the steering shaft is stabilized, and problems such as loosening are less likely to occur.

請求項２の発明は、請求項１の発明において、前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記座部を含む平面を通る垂線に対して、前記雌ねじ孔の軸線を、前記ボス部側に所定角度傾斜させたことを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, in the state where the pair of projecting portions of the yoke is not tightened by the yoke bolt, the female screw hole is formed with respect to a perpendicular passing through the plane including the seat portion. The axis is inclined at a predetermined angle toward the boss portion.

ヨークボルトによる締め上げによって一対の突出部の相互間隙間が狭くなり、かつ、両突出部の相対角度が変化する。締め上げ完了までの両突出部の相対角度の変化分だけ、雌ねじ孔の軸線を座部を含む平面を通る垂線に対して予めボス部側に傾斜させておくことにより、締め付け完了時に雌ねじ孔の軸線が座部を含む平面に対して直交することになる。これによりヨークボルトの曲げ応力を低減する。   By tightening with the yoke bolt, the gap between the pair of protrusions becomes narrow, and the relative angle between the protrusions changes. The axial line of the female screw hole is inclined in advance toward the boss part with respect to the perpendicular passing through the plane including the seat part by the change in the relative angle of both protrusions until the completion of tightening. The axis is orthogonal to the plane including the seat. This reduces the bending stress of the yoke bolt.

請求項３の発明は、請求項２の発明において、前記一方の突出部のボルト孔の一部に前記雌ねじ孔を形成し、雌ねじ孔を形成しない残余のボルト孔を当該雌ねじ孔と軸線を共有し前記雌ねじ孔よりも大きな径に形成し、かつ、前記他方の突出部のボルト孔を前記残余のボルト孔と同径に形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記雌ねじ孔、残余のボルト孔および前記他方の突出部のボルト孔の各軸線を、同一線上に位置させたことを特徴とする。   According to a third aspect of the present invention, in the second aspect of the invention, the female screw hole is formed in a part of the bolt hole of the one projecting portion, and the remaining bolt hole not forming the female screw hole is shared with the female screw hole. And the bolt hole of the other protrusion is formed to have the same diameter as the remaining bolt hole, and the pair of protrusions of the yoke are tightened by the yoke bolt. In the absence, the axes of the female screw hole, the remaining bolt hole, and the bolt hole of the other protrusion are positioned on the same line.

これにより、一対の突出部のボルト孔の加工形成が容易となる。   This facilitates the formation of the bolt holes in the pair of protrusions.

請求項４の発明は、請求項２の発明において、前記残余のボルト孔と前記他方の突出部のボルト孔を同径に形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記残余のボルト孔と前記他方の突出部のボルト孔の各軸線を同一線上に位置させると共に、これら軸線に対して前記座部を含む平面を直交させたことを特徴とする。   According to a fourth aspect of the present invention, in the second aspect of the present invention, the remaining bolt hole and the bolt hole of the other protrusion are formed to have the same diameter, and the pair of protrusions of the yoke are tightened by the yoke bolt. In the absence, the axes of the remaining bolt holes and the bolt holes of the other protrusion are positioned on the same line, and the plane including the seat portion is orthogonal to these axes.

これにより、一対の突出部のボルト孔を座部を含めて一工程で加工形成することが可能となる。   Thereby, it becomes possible to process and form the bolt hole of a pair of protrusion part including a seat part in one process.

請求項５の発明は、請求項１〜４のいずれか１項の発明において、前記一方の突出部のボルト孔にナットを固定し、このナットに前記雌ねじ孔を形成したことを特徴とする。   The invention of claim 5 is characterized in that, in the invention of any one of claims 1 to 4, a nut is fixed to the bolt hole of the one projecting portion, and the female screw hole is formed in the nut.

これにより、雌ねじ孔を別途形成する必要がなくなる。   This eliminates the need to separately form a female screw hole.

請求項６の発明は、請求項１〜５のいずれか１項に記載のステアリングシャフトとヨークの結合構造を備えたことを特徴とする自動車のステアリング装置用自在継手である。   A sixth aspect of the present invention is a universal joint for a steering apparatus of an automobile, comprising the steering shaft and yoke coupling structure according to any one of the first to fifth aspects.

ステアリング装置用自在継手の耐久性と信頼性が向上する。   The durability and reliability of the universal joint for steering devices is improved.

本発明によれば、ヨークボルトに対する曲げ応力が低減され、ステアリングシャフトとヨークの結合構造における強度と信頼性を向上させることができる。   According to the present invention, the bending stress on the yoke bolt is reduced, and the strength and reliability of the combined structure of the steering shaft and the yoke can be improved.

以下、本発明を実施するための最良の形態について図１〜図３に基づいて説明する。図１が第１実施形態、図２が第２実施形態、図３が第３実施形態を示す。以下の説明において、図４〜図６で説明した部材と同一部材には同一符合を使用する。   Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. 1 shows the first embodiment, FIG. 2 shows the second embodiment, and FIG. 3 shows the third embodiment. In the following description, the same reference numerals are used for the same members as those described in FIGS.

図１は、本発明に係る自動車のステアリング装置用の十字ジョイント又はＢＪのヨーク１についての第１実施形態を示すもので、同図（Ａ）は、ヨークボルト５で締め上げていない状態におけるヨーク１の座部７側の側面図、同図（Ｂ）は、そのＢ−Ｂ断面図、同図（Ｃ）は、ヨークボルト５で締め上げた状態におけるヨーク１の座部７側の側面図、同図（Ｄ）は、そのＣ−Ｃ断面図である。   FIG. 1 shows a first embodiment of a cross joint or BJ yoke 1 for an automobile steering apparatus according to the present invention. FIG. 1 (A) shows a yoke in a state where the yoke bolt 5 is not tightened. 1B is a cross-sectional view taken along the line B-B of FIG. 1, and FIG. 3C is a side view of the yoke 1 on the side of the seat 7 in a state where the yoke bolt 5 is tightened. FIG. 4D is a cross-sectional view taken along the line C-C.

これら各図に示すように、ヨーク１は、ボス部２と一対の突出部４ａ、４ｂを有する。ボス部２は割りを有する円筒形をなし、その内側に雌スプライン付きの挿入孔２ａが形成される。この挿入孔２ａにステアリングシャフト９の一端部が挿入される。ステアリングシャフト９の一端部外周には雄スプライン９ａが形成される。   As shown in these drawings, the yoke 1 has a boss portion 2 and a pair of projecting portions 4a and 4b. The boss portion 2 has a split cylindrical shape, and an insertion hole 2a with a female spline is formed inside thereof. One end of the steering shaft 9 is inserted into the insertion hole 2a. A male spline 9 a is formed on the outer periphery of one end of the steering shaft 9.

一対の突出部４ａ、４ｂは、ボス部２の径方向外方に突出し、かつ、ヨークボルト５を挿通するためのボルト孔６ａ、６ｂがボス部２の軸線と直角方向に貫設される。一対の突出部４ａ、４ｂは一定厚さの板状をなす。ヨークボルト５の締め上げ前は両突出部４ａ、４ｂの対向面はスリット３を明けて平行をなす。   The pair of projecting portions 4 a and 4 b project outward in the radial direction of the boss portion 2, and bolt holes 6 a and 6 b for inserting the yoke bolt 5 are provided in a direction perpendicular to the axis of the boss portion 2. The pair of protrusions 4a and 4b has a plate shape with a constant thickness. Before the yoke bolt 5 is tightened, the opposing surfaces of the projecting portions 4a and 4b are opened to make the slit 3 parallel.

一方の突出部４ａのボルト孔６ａに雌ねじ孔８が部分的に形成される。詳しくは、スリット３とは反対側のボルト孔６ａの端部から軸長三分の二程度の長さで雌ねじ孔８が形成される。ヨークボルト５の雄ねじ部５ａが雌ねじ孔８に螺合する。雌ねじ孔８の形成位置は、上記と反対側すなわちスリット３がある側、あるいはボルト孔６ａの中間部に形成してもよい。ボルト孔６ａの雌ねじ孔８が形成されていない残余のボルト孔は、雌ねじ孔８よりも大径で雌ねじ孔８と同軸に形成される。   A female screw hole 8 is partially formed in the bolt hole 6a of one protrusion 4a. Specifically, the female screw hole 8 is formed with a length of about two-thirds of the axial length from the end of the bolt hole 6a opposite to the slit 3. The male screw portion 5 a of the yoke bolt 5 is screwed into the female screw hole 8. The formation position of the female screw hole 8 may be formed on the side opposite to the above, that is, on the side where the slit 3 is provided, or on the intermediate portion of the bolt hole 6a. The remaining bolt hole in which the female screw hole 8 of the bolt hole 6 a is not formed is larger in diameter than the female screw hole 8 and is formed coaxially with the female screw hole 8.

他方の突出部４ｂに、ヨークボルト５の頭部５ｂが着座する面一円環状の座部７が形成される。座部７は、スリット３とは反対側のボルト孔６ｂの端部開口部の周囲に形成される。ボルト孔６ｂの軸線は、座部７を通る垂線に対して、ボス部２側に所定角度αだけ傾斜される。ボルト孔６ｂはボルト孔６ａと同径に形成され、かつ、ヨークボルト５を締め上げていない状態でボルト孔６ａと共通の軸線を有する。   The other projecting portion 4b is formed with an annular seat portion 7 on which the head 5b of the yoke bolt 5 is seated. The seat portion 7 is formed around the end opening portion of the bolt hole 6 b on the side opposite to the slit 3. The axis of the bolt hole 6 b is inclined by a predetermined angle α toward the boss portion 2 with respect to the perpendicular passing through the seat portion 7. The bolt hole 6b is formed in the same diameter as the bolt hole 6a, and has an axis common to the bolt hole 6a in a state where the yoke bolt 5 is not tightened.

第１実施形態のヨーク１は以上のように構成され、図１（Ｄ）に示すように、ヨークボルト５によりヨーク１を締め上げた状態では、スリット３が狭まるようにヨーク１が変形する。これにより、ステアリングシャフト９の一端が締め付けられて固定される。このとき、雌ねじ孔８の軸線は、座部７を含む平面を通る垂線に対して、前記所定角度αの傾斜とは逆方向に等角だけ傾斜し、座部７を含む平面を通る垂線に対して平行ないし一致する。換言すると、雌ねじ孔８の軸線は座部を含む平面に対して直角となる（図示の角度β）。また、ヨークボルト５による締め上げ完了状態で、ボルト孔６ｂの内側にヨークボルト５とボルト孔内周面とを非接触とする空隙部Ｇが形成される。したがって、図１（Ｄ）の状態ではヨークボルト５に曲げ応力がほとんど作用しない。   The yoke 1 according to the first embodiment is configured as described above. As shown in FIG. 1D, when the yoke 1 is tightened by the yoke bolt 5, the yoke 1 is deformed so that the slit 3 is narrowed. Thereby, one end of the steering shaft 9 is fastened and fixed. At this time, the axis of the female screw hole 8 is inclined by an equal angle in a direction opposite to the inclination of the predetermined angle α with respect to the normal passing through the plane including the seat 7, and is perpendicular to the plane including the seat 7. Parallel or coincide with each other. In other words, the axis of the female screw hole 8 is perpendicular to the plane including the seat (the angle β shown in the figure). In addition, when the tightening by the yoke bolt 5 is completed, a gap G is formed inside the bolt hole 6b so that the yoke bolt 5 and the inner peripheral surface of the bolt hole are not in contact with each other. Accordingly, bending stress hardly acts on the yoke bolt 5 in the state of FIG.

次に、本発明の第２実施形態を図２（Ａ）（Ｂ）に基づき説明する。図２（Ａ）はヨークボルト５で締め上げていない状態におけるヨーク１の縦断面図、図２（Ｂ）はヨークボルト５で締め上げた状態におけるヨーク１の縦断面図である。この第２実施形態では、雌ねじ孔８をナット１０で構成する。すなわち、第１実施形態では雌ねじ孔８をボルト孔６ａに直接形成したが、第２実施形態ではスリット３と反対側のボルト孔６ａの開口に圧入又は溶接等によりナット１０を固定し、ナット１０の雌ねじ孔８で代用する。ナット１０ないし雌ねじ孔８の軸線は、図１（Ｂ）と同様に、座部７を通る垂線に対して、ボス部２側に所定角度αだけ傾斜される。   Next, a second embodiment of the present invention will be described with reference to FIGS. 2A is a longitudinal sectional view of the yoke 1 in a state where it is not tightened with the yoke bolt 5, and FIG. 2B is a longitudinal sectional view of the yoke 1 when it is tightened with the yoke bolt 5. In the second embodiment, the female screw hole 8 is constituted by a nut 10. That is, in the first embodiment, the female screw hole 8 is formed directly in the bolt hole 6a, but in the second embodiment, the nut 10 is fixed to the opening of the bolt hole 6a opposite to the slit 3 by press-fitting or welding. The female screw hole 8 is substituted. The axis of the nut 10 or the female screw hole 8 is inclined by a predetermined angle α toward the boss portion 2 with respect to the perpendicular passing through the seat portion 7 as in FIG.

ボルト孔６ａとボルト孔６ｂは雌ねじ部がなく、雌ねじ孔８よりも大径で互いに同径である。図２（Ａ）のようにヨークボルトの締め上げ前の状態においてボルト孔６ａとボルト孔６ｂの軸線は同一線上にある。また、ボルト孔６ａとボルト孔６ｂの軸線は座部７を含む平面に対して直交する。ヨークボルト５により突出部４ａ、４ｂを締め上げた状態においては、図２（Ｂ）のように、雌ねじ孔８の軸線が座部７を含む平面を通る垂線に対して平行ないし一致する。換言すると、雌ねじ孔８の軸線は座部を含む平面に対して直角となる（図示の角度β）。また、ヨークボルト５による締め上げ完了状態で、ボルト孔６ｂの内側にヨークボルト５とボルト孔内周面とを非接触とする空隙部Ｇが形成される。したがって、図２（Ｂ）の状態ではヨークボルト５に曲げ応力がほとんど作用しない。   The bolt hole 6a and the bolt hole 6b do not have an internal thread portion, and are larger in diameter than the internal thread hole 8 and have the same diameter. As shown in FIG. 2A, the axis of the bolt hole 6a and the bolt hole 6b are on the same line before the yoke bolt is tightened. The axis of the bolt hole 6 a and the bolt hole 6 b is orthogonal to the plane including the seat portion 7. In a state where the projecting portions 4 a and 4 b are tightened by the yoke bolt 5, the axis of the female screw hole 8 is parallel or coincides with a perpendicular passing through the plane including the seat portion 7 as shown in FIG. In other words, the axis of the female screw hole 8 is perpendicular to the plane including the seat (the angle β shown in the figure). In addition, when the tightening by the yoke bolt 5 is completed, a gap G is formed inside the bolt hole 6b so that the yoke bolt 5 and the inner peripheral surface of the bolt hole are not in contact with each other. Therefore, almost no bending stress acts on the yoke bolt 5 in the state of FIG.

次に、本発明の第３実施形態を図３（Ａ）（Ｂ）に基づき説明する。図３（Ａ）はヨークボルト５で締め上げていない状態におけるヨーク１の縦断面図、図３（Ｂ）はヨークボルト５で締め上げた状態におけるヨーク１の縦断面図である。この第３実施形態でも、雌ねじ孔８をナット１０で構成する。ナット１０ないし雌ねじ孔８の軸線は、図１（Ｂ）と同様に、座部７を通る垂線に対してボス部２側に所定角度αだけ傾斜される。   Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 3A is a longitudinal sectional view of the yoke 1 in a state where it is not tightened with the yoke bolt 5, and FIG. 3B is a longitudinal sectional view of the yoke 1 when it is tightened with the yoke bolt 5. Also in the third embodiment, the female screw hole 8 is constituted by the nut 10. The axis of the nut 10 or the female screw hole 8 is inclined by a predetermined angle α toward the boss portion 2 with respect to the perpendicular passing through the seat portion 7, as in FIG.

ボルト孔６ａとボルト孔６ｂは雌ねじ部がなく、雌ねじ孔８よりも大径で互いに同径である。図３（Ａ）のようにヨークボルトの締め上げ前の状態においてボルト孔６ａとボルト孔６ｂの軸線は同一線上にある。また、ボルト孔６ａとボルト孔６ｂの軸線は、ナット１０ないし雌ねじ孔８の軸線と共通である。つまり、ボルト孔６ａとボルト孔６ｂの軸線は、座部７を通る垂線に対してボス部２側に所定角度αだけ傾斜される。ヨークボルト５により突出部４ａ、４ｂを締め上げた状態においては、図３（Ｂ）のように、雌ねじ孔８の軸線が座部７を含む平面を通る垂線に対して平行ないし一致する。換言すると、雌ねじ孔８の軸線は座部を含む平面に対して直角となる（図示の角度β）。また、ヨークボルト５による締め上げ完了状態で、ボルト孔６ｂの内側にヨークボルト５とボルト孔内周面とを非接触とする空隙部Ｇが形成される。したがって、図３（Ｂ）の状態ではヨークボルト５に曲げ応力がほとんど作用しない。   The bolt hole 6a and the bolt hole 6b do not have an internal thread portion, and are larger in diameter than the internal thread hole 8 and have the same diameter. As shown in FIG. 3A, the axis of the bolt hole 6a and the bolt hole 6b are on the same line before the yoke bolt is tightened. The axis of the bolt hole 6a and the bolt hole 6b is the same as the axis of the nut 10 or the female screw hole 8. That is, the axis of the bolt hole 6 a and the bolt hole 6 b is inclined by a predetermined angle α toward the boss portion 2 with respect to the perpendicular passing through the seat portion 7. In a state where the projecting portions 4 a and 4 b are tightened by the yoke bolt 5, the axis of the female screw hole 8 is parallel to or coincides with a perpendicular passing through a plane including the seat portion 7 as shown in FIG. In other words, the axis of the female screw hole 8 is perpendicular to the plane including the seat (the angle β shown in the figure). In addition, when the tightening by the yoke bolt 5 is completed, a gap G is formed inside the bolt hole 6b so that the yoke bolt 5 and the inner peripheral surface of the bolt hole are not in contact with each other. Accordingly, bending stress hardly acts on the yoke bolt 5 in the state of FIG.

上記実施形態は、本発明を自動車のステアリング装置用の十字ジョイント又はＢＪのヨークに適用したものであるが、本発明は、これ以外の自在継手のヨークにも、適用可能である。例えば、スリッパジョイント、ウオブルジョイント等の不等速自在継手のヨークに適用可能である。また、ＢＪ以外の固定式等速自在継手であるアンダーカットフリージョイント、テーパードトラックアンダーカットフリージョイント等は勿論、ダブルオフセット型、クロスグルーブ型、トリポード型等の摺動式等速自在継手にも適用可能である。即ち、本発明は、ヨークを備えた自動車のステアリング装置用の自在継手全てに適用可能なものである。   In the above embodiment, the present invention is applied to a cross joint or BJ yoke for a steering apparatus of an automobile. However, the present invention can also be applied to a universal joint yoke. For example, the invention can be applied to yokes of inconstant universal joints such as slipper joints and wobble joints. Also applicable to fixed constant velocity universal joints other than BJ, such as undercut free joints and tapered track undercut free joints, as well as sliding type constant velocity universal joints such as double offset type, cross groove type, tripod type, etc. Is possible. That is, the present invention can be applied to all universal joints for a steering apparatus of an automobile provided with a yoke.

本発明の第１実施形態を示すもので、（Ａ）はヨークボルトで締め上げていない状態のヨークの側面図、（Ｂ）はそのＢ−Ｂ断面図、（Ｃ）はヨークボルトを締め上げた状態のヨークの側面図、（Ｄ）はそのＣ−Ｃ断面図。BRIEF DESCRIPTION OF THE DRAWINGS It shows 1st Embodiment of this invention, (A) is a side view of the yoke of the state which is not fastened with a yoke bolt, (B) is the BB sectional drawing, (C) is a yoke bolt fastened The side view of the yoke in the state where it was, (D) is the CC sectional drawing. 本発明の第２実施形態を示すもので、（Ａ）はヨークボルトで締め上げていない状態のヨークの縦断面図、（Ｂ）はヨークボルトで締め上げた状態のヨークの縦断面図。The 2nd Embodiment of this invention is shown, (A) is a longitudinal cross-sectional view of the yoke of the state which is not fastened with a yoke bolt, (B) is a longitudinal cross-sectional view of the yoke of the state fastened with the yoke bolt. 本発明の第３実施形態を示すもので、（Ａ）はヨークボルトで締め上げていない状態のヨークの縦断面図、（Ｂ）はヨークボルトで締め上げた状態のヨークの縦断面図。The 3rd Embodiment of this invention is shown, (A) is a longitudinal cross-sectional view of the yoke of the state which is not fastened with a yoke bolt, (B) is a longitudinal cross-sectional view of the yoke of the state fastened with the yoke bolt. 従来のヨークを備えた十字ジョイントの側面図。The side view of the cross joint provided with the conventional yoke. 従来のヨークを備えたＢＪの側面図。The side view of BJ provided with the conventional yoke. （Ａ）はヨークボルトを締め上げていない状態の従来のヨークの縦断面図、（Ｂ）はヨークボルトで締め上げた状態の従来のヨークの縦断面図。(A) is a longitudinal sectional view of a conventional yoke in a state where the yoke bolt is not tightened, and (B) is a longitudinal sectional view of the conventional yoke in a state where the yoke bolt is tightened.

符号の説明Explanation of symbols

１ ヨーク
２ ボス部
４ａ 雌ねじ孔側突出部
４ｂ 座部側突出部
５ ヨークボルト
５ｂ ヨークボルトの頭部
６ａ 雌ねじ孔側ボルト孔
６ｂ 座部側ボルト孔
７ 座部
８ 雌ねじ孔
９ ステアリングシャフト
９ａ ステアリングシャフトの雄スプライン
１０ ナット
Ｇ 空隙部 DESCRIPTION OF SYMBOLS 1 Yoke 2 Boss part 4a Female screw hole side protrusion part 4b Seat part side protrusion part 5 York bolt 5b Head part of yoke bolt 6a Female screw hole side bolt hole 6b Seat part side bolt hole 7 Seat part 8 Female screw hole 9 Steering shaft 9a Steering shaft Male spline 10 Nut G Gap

Claims (6)

ステアリングシャフトと、前記ステアリングシャフトの一端部を挿入可能なボス部を備えたヨークの結合構造であって、前記ヨークは前記ボス部の径方向外方に突出すると共に前記ボス部の軸線と直角方向にヨークボルトを挿通するためのボルト孔が貫設された一対の突出部を備え、前記一対の突出部のうちの一方の突出部のボルト孔に前記ヨークボルトが螺合する雌ねじ孔を設けると共に、他方の突出部のボルト孔の開口の周囲に前記ヨークボルトの頭部が着座する座部を形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げた状態において、前記座部を含む平面に対して前記雌ねじ孔の軸線を直交させると共に、前記他方の突出部のボルト孔の内周面に対して前記ヨークボルトを非接触とする空隙部を形成したことを特徴とするステアリングシャフトとヨークの結合構造。   A coupling structure of a steering shaft and a yoke having a boss part into which one end of the steering shaft can be inserted, wherein the yoke protrudes radially outward of the boss part and is perpendicular to the axis of the boss part A pair of protrusions through which a bolt hole for inserting the yoke bolt is provided, and a female screw hole into which the yoke bolt is screwed into the bolt hole of one of the pair of protrusions. A seat portion on which the head of the yoke bolt is seated is formed around the opening of the bolt hole of the other projecting portion, and when the pair of projecting portions of the yoke are tightened by the yoke bolt, the seat portion is A gap is formed so that the axis of the female screw hole is perpendicular to a plane including the inner bolt and the yoke bolt is not in contact with the inner peripheral surface of the bolt hole of the other protrusion. Coupling structure of the steering shaft and the yoke that. 前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記座部を含む平面を通る垂線に対して、前記雌ねじ孔の軸線を、前記ボス部側に所定角度傾斜させたことを特徴とする請求項１に記載のステアリングシャフトとヨークの結合構造。   In a state where the pair of projecting portions of the yoke are not tightened by the yoke bolt, the axis of the female screw hole is inclined at a predetermined angle toward the boss portion with respect to a perpendicular passing through a plane including the seat portion. The combined structure of a steering shaft and a yoke according to claim 1. 前記一方の突出部のボルト孔の一部に前記雌ねじ孔を形成し、雌ねじ孔を形成しない残余のボルト孔を当該雌ねじ孔と軸線を共有し前記雌ねじ孔よりも大きな径に形成し、かつ、前記他方の突出部のボルト孔を前記残余のボルト孔と同径に形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記雌ねじ孔、残余のボルト孔および前記他方の突出部のボルト孔の各軸線を、同一線上に位置させたことを特徴とする請求項２に記載のステアリングシャフトとヨークの結合構造。   Forming the female screw hole in a part of the bolt hole of the one projecting portion, forming a remaining bolt hole that does not form the female screw hole with a diameter larger than the female screw hole in common with the female screw hole; and In the state where the bolt hole of the other protrusion is formed to have the same diameter as the remaining bolt hole, and the pair of protrusions of the yoke are not tightened by the yoke bolt, the female screw hole, the remaining bolt hole, and the 3. The steering shaft / yoke coupling structure according to claim 2, wherein each axis of the bolt hole of the other protrusion is positioned on the same line. 前記残余のボルト孔と前記他方の突出部のボルト孔を同径に形成し、前記ヨークボルトで前記ヨークの一対の突出部を締め上げていない状態において、前記残余のボルト孔と前記他方の突出部のボルト孔の各軸線を同一線上に位置させると共に、これら軸線に対して前記座部を含む平面を直交させたことを特徴とする請求項２に記載のステアリングシャフトとヨークの結合構造。   In the state where the remaining bolt hole and the bolt hole of the other protruding portion have the same diameter, and the pair of protruding portions of the yoke are not tightened by the yoke bolt, the remaining bolt hole and the other protruding portion 3. The steering shaft / yoke coupling structure according to claim 2, wherein each axis of the bolt hole of the portion is positioned on the same line, and a plane including the seat portion is orthogonal to these axes. 前記一方の突出部のボルト孔にナットを固定し、このナットに前記雌ねじ孔を形成したことを特徴とする請求項１〜４のいずれか１項に記載のステアリングシャフトとヨークの結合構造。   The steering shaft / yoke coupling structure according to any one of claims 1 to 4, wherein a nut is fixed to the bolt hole of the one projecting portion, and the female screw hole is formed in the nut. 請求項１〜５のいずれか１項に記載のステアリングシャフトとヨークの結合構造を備えたことを特徴とする自動車のステアリング装置用自在継手。   A universal joint for a steering apparatus for an automobile, comprising the coupling structure of a steering shaft and a yoke according to any one of claims 1 to 5.
JP2007170360A 2007-06-28 2007-06-28 Joining structure of steering shaft and yoke Withdrawn JP2009008174A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011111096A (en) * 2009-11-30 2011-06-09 Nsk Ltd Bolt fastening mechanism of steering yoke
WO2011102212A1 (en) 2010-02-17 2011-08-25 日本精工株式会社 Joint cross type universal joint yoke and method of manufacturing same
JP2011169440A (en) * 2010-02-22 2011-09-01 Nsk Ltd Universal joint
WO2015174433A1 (en) * 2014-05-15 2015-11-19 日本精工株式会社 Joint cross-type universal joint yoke
WO2015174432A1 (en) * 2014-05-13 2015-11-19 日本精工株式会社 Joint cross-type universal joint yoke and manufacturing method therefor
KR20190001259A (en) * 2017-06-27 2019-01-04 남양공업주식회사 Pinch yoke of steering system for a car

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011111096A (en) * 2009-11-30 2011-06-09 Nsk Ltd Bolt fastening mechanism of steering yoke
WO2011102212A1 (en) 2010-02-17 2011-08-25 日本精工株式会社 Joint cross type universal joint yoke and method of manufacturing same
US8845438B2 (en) 2010-02-17 2014-09-30 Nsk Ltd. Yoke for a cross type universal joint and manufacturing method thereof
JP2011169440A (en) * 2010-02-22 2011-09-01 Nsk Ltd Universal joint
US10156267B2 (en) 2014-05-13 2018-12-18 Nsk Ltd. Yoke for cross shaft universal joint and method for manufacturing the same
WO2015174432A1 (en) * 2014-05-13 2015-11-19 日本精工株式会社 Joint cross-type universal joint yoke and manufacturing method therefor
CN106460949A (en) * 2014-05-15 2017-02-22 日本精工株式会社 Joint cross-type universal joint yoke
JPWO2015174433A1 (en) * 2014-05-15 2017-04-20 日本精工株式会社 Cross shaft type universal joint yoke
US10119575B2 (en) 2014-05-15 2018-11-06 Nsk Ltd. Yoke for cross shaft universal joint
WO2015174433A1 (en) * 2014-05-15 2015-11-19 日本精工株式会社 Joint cross-type universal joint yoke
CN106460949B (en) * 2014-05-15 2019-11-22 日本精工株式会社 Universal-joint-pin type universal connector fork yoke
KR20190001259A (en) * 2017-06-27 2019-01-04 남양공업주식회사 Pinch yoke of steering system for a car
KR101963107B1 (en) * 2017-06-27 2019-03-28 남양넥스모 주식회사 Pinch yoke of steering system for a car

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