JP2004060839A - Ball joint - Google Patents

Ball joint Download PDF

Info

Publication number
JP2004060839A
JP2004060839A JP2002222708A JP2002222708A JP2004060839A JP 2004060839 A JP2004060839 A JP 2004060839A JP 2002222708 A JP2002222708 A JP 2002222708A JP 2002222708 A JP2002222708 A JP 2002222708A JP 2004060839 A JP2004060839 A JP 2004060839A
Authority
JP
Japan
Prior art keywords
housing
dust cover
ball
reinforcing ring
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002222708A
Other languages
Japanese (ja)
Other versions
JP2004060839A5 (en
Inventor
Seiki Kajiwara
梶原 誠記
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Musashi Seimitsu Industry Co Ltd
Original Assignee
Musashi Seimitsu Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Musashi Seimitsu Industry Co Ltd filed Critical Musashi Seimitsu Industry Co Ltd
Priority to JP2002222708A priority Critical patent/JP2004060839A/en
Publication of JP2004060839A publication Critical patent/JP2004060839A/en
Publication of JP2004060839A5 publication Critical patent/JP2004060839A5/ja
Pending legal-status Critical Current

Links

Images

Landscapes

  • Pivots And Pivotal Connections (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball joint having a dust cover capable of restraining increase of work man-hour and exhibiting high load resistance in the pulling out direction at low cost. <P>SOLUTION: This ball joint comprises the dust cover having one small opening part attached on an outer periphery of a shank part of a ball stud, and the other large opening part attached on an outer periphery of a housing. An annular recessed part is formed on an outer peripheral surface of the housing. A reinforcing ring having a protruding part protruding to the inside diameter side is buried in the large opening part of the dust cover. An inside diameter of the protruding part is larger than an outside diameter of the recessed part of the housing, and is smaller than an outside diameter of the housing. The dust cover is attached in a state that the protruding part of the reinforcing ring is fitted into the recessed part of the housing. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【産業上の利用分野】
本発明は、例えば自動車の懸架装置及び操舵装置等に使用されるボールジョイント及びその製造方法に関する。
【0002】
【従来の技術】
従来から使用されているボールジョイントには、図10に示される如きものがある。このボールジョイント101は、球状の球頭部104と球頭部104から延出する柄部103とからなるボールスタッド102と、ボールスタッド102の球頭部104を揺動回動自在に包持するベアリング106と、ベアリング106を内包し一方にボールスタッド102の柄部103を突出させるハウジング開口部109を有し外周に周状の凹部110が形成されるハウジング108と、一方小開口部114をボールスタッド102の柄部103外周に、環状のサークリップ116が嵌装される他方大開口部115をハウジング108の凹部110に各々装着するダストカバー113とよりなる。
【0003】
上記ボールジョイント101におけるダストカバー113装着工程は、まずボールスタッド102の柄部103側からダストカバー113を圧入し、一方小開口部114をボールスタッド102の柄部103に装着し、他方大開口部115をハウジング108の凹部110に装着した後、渦巻状のサークリップ116を大開口部115外周に嵌装して、大開口部115をハウジング108の凹部110に固定していた。
【0004】
【発明が解決しようとする課題】
上記ボールジョイント101は、ダストカバー113における引抜方向の耐荷重性やシール性を高めるためにダストカバー113の大開口部115に金属製のサークリップ116が嵌装され、ハウジング108の凹部110に固定されていた。このようにサークリップ116が必要となるため部品点数が増加し、価格が高価になるということがあった。また、サークリップ116をダストカバー113の大開口部115に嵌装する工程が必要となるため組立工数が増加するということもあった。さらに、ダストカバー113の大開口部115を装着するためにハウジング108の外周には凹部110が設けられているが、ダストカバー113の大開口部115をハウジング108の凹部110にサークリップ116で締付けて引抜強度を保たせるためには凹部110に径方向の深さが必要となるので、凹部110が形成される部分は他の部分と比較して薄肉になり、ハウジング108の凹部110の強度が弱くなるということがあった。
【0005】
また従来の他のボールジョイントには、図11に示される如きものもある。図11に示されるボールジョイント201は、球状の球頭部204と球頭部204から延出する柄部203とよりなるボールスタッド202と、ボールスタッド202の球頭部204を揺動回動自在に包持するベアリング206と、ベアリング206を内包し一方にボールスタッド202の柄部204を突出させる第一開口部209、他方に内周に閉止板212をかしめ固定する第二開口部211を有するハウジング208と、一方小開口部214を環状のフェルール環205を介してボールスタッド202の柄部203外周に、圧入環216が埋設された大開口部215をハウジング208の第一開口部209外周に各々装着されるダストカバー213とよりなる。
【0006】
上記の如きボールジョイント201は、ダストカバー213の大開口部215内径及び圧入環216の内径がハウジング208の第一開口部209外径より小径に形成されており、ダストスバー213の大開口部215をハウジング208の第一開口部209の外周に圧入して、その内周側への圧力により大開口部215を装着している。しかし、ダストカバー213の大開口部215及び圧入環216の内径とハウジング208の第一開口部209の外径の径差による圧力だけでダストカバー213がハウジング208に装着されているため、ボールスタッド202の揺動によりダストカバー213に引抜方向の荷重がかかった時の引抜方向の耐荷重性を高く設定できないということがあった。
【0007】
従って本発明は上記の如き課題を解決し、廉価で加工工数の増加が抑制でき、引抜方向の耐荷重性が高いダストカバーを有するボールジョイントを提供する事を目的とする。
【0008】
【課題を解決するための手段】
本発明のボールジョイントの構成は以下の通りである。
【0009】
球状の球頭部と球頭部から延出する柄部とを有するボールスタッドと、ボールスタッドの球頭部を包持するベアリングと、ベアリングを保持し、一方端部に内周からボールスタッドの柄部を突出させるハウジング開口部を有するハウジングと、一方小開口部がボールスタッドの柄部外周に装着され他方大開口部がハウジングの外周に装着されるダストカバーとからなるボールジョイントにおいて、ハウジングは外周面に周状の凹部が形成され、ダストカバーの大開口部は内径側に突出する凸部を有する補強環が埋設されており、凸部内径はハウジングの凹部外径より大径でハウジングの外径より小径であり、ダストカバーは補強環の凸部がハウジングの凹部に嵌合した状態で装着されている。
【0010】
また、本発明によるボールジョイントの製造方法は以下の通りである。
【0011】
1.球状の球頭部と球頭部から延出する柄部とを有するボールスタッドと、ボールスタッドの球頭部を包持するベアリングと、ベアリングを保持し、一方端部に内周からボールスタッドの柄部を突出させるハウジング開口部を有し外周面に周状の凹部が形成されるハウジングと、一方小開口部がボールスタッドの柄部外周に他方大開口部がハウジングの凹部外周に装着されるダストカバーとからなるボールジョイントの製造方法において、ダストカバーの他方大開口部には予め略円筒形でハウジングの外径より大径の内径を有する予備補強環が埋設されており、ハウジングの凹部と予備補強環とを軸線方向同位置に配置後、予備補強環を内径側に押圧して形成した凸部をハウジングの凹部に嵌合させてダストカバーをハウジングに装着させる。
【0012】
2.予備補強環は、軸線方向両端から中央に向けて漸次縮径する形状である。
【0013】
【実施例】
以下、本発明の実施例を図1乃至図9に基づいて説明する。
【0014】
図1は本発明の実施例によるボールジョイント1を表す。このボールジョイント1は、球状の球頭部4と球頭部4から突出し周状の装着溝5を有する柄部3とよりなるボールスタッド2と、ボールスタッド2の球頭部4を揺動回動自在に包持し一端にベアリング開口部7が形成されるベアリング6と、ベアリング6を内包し一端に内周側からボールスタッド2の柄部3を突出させるハウジング開口部9、他端に他端を塞ぐ閉塞底部11、底部11から反ハウジング開口側に延出する軸部12とを有し、外周面に周状の凹部10が形成されるハウジング8と、一方小開口部14をボールスタッド2の装着溝5外周に、補強環16が埋設された他方大開口部15をハウジング8の凹部10に各々装着するダストカバー13とよりなる。
【0015】
上記ダストカバー13について詳細に説明する。ダストカバー13の大開口部15に埋設された補強環16は金属製の略円筒形で、図2に示される如く補強環16の軸線方向全長はハウジング8の凹部10の軸線方向長さより長く、凹部10の軸線方向両端位置からはみ出し装着される。また、この補強環16は軸線方向両端から中央に向けて漸次縮径して内径側に突出する凸部17が形成されている。この凸部17は内径がハウジング8の凹部10外径より大径且つハウジング8の外径より小径であり、ハウジング8の凹部10内に嵌合した状態で配置されている。
【0016】
続いて上記ボールジョイント1の組立工程を図に基づいて説明する。
【0017】
まず、ボールスタッド2の球頭部4にベアリング6を嵌装し、続いてベアリング6が球頭部4に嵌装されたボールスタッド2をハウジング8内に挿入する。その後リング14をボールスタッド2の柄部3からハウジング開口部9内周に挿入し、ハウジング8のハウジング開口部9付近を軸芯側に曲成する。続いて図3に示す如くダストカバー13をボールスタッド2の柄部か4ら挿入する。このときダストカバー13の他方大開口部15には、一端部から他端部までほぼ均一の内径を有する円筒形の予備補強環16aが埋設されている。次に図4に示す如く、ダストカバー13の一方小開口部14をボールスタッド2の装着溝5外周に装着し、図5に示す如く他方大開口部15を予備補強環16aがハウジング8の凹部10と軸線方向同位置になるように配置する。次に図6及び図7に示す如く、押圧治具51でダストカバー13の大開口部15を内径側に押圧する。この治具51はダストカバー13の他方大開口部15と軸線方向同位置にダストカバー13の外側に放射状に配置されており、治具51のダストカバー13側端面である押圧部52は完成状態のボールジョイント1における補強環16の外周形状と略同一である。この治具51に押圧されることにより、ダストカバー13の他方大開口部15及び予備補強環16aは押圧治具51の押圧部52の形状に倣って内径側に変形し、予備補強環16aには軸線方向両端部から軸線方向中央部に向けて縮径されて内径側に突出する凸部17が形成され、形成された補強環16の凸部17がハウジング8の凹部10内に嵌合することにより、図1に示される如きボールジョイント1が完成する。このとき補強環16の両端部は凹部10よりはみ出している。
【0018】
よって上記の如きボールジョイント1によれば、ハウジング8の凹部10にダストカバー13の他方大開口部15に埋設された補強環16の凸部17が嵌合するので、補強環16によりダストカバー13がハウジング8に固定できる。また、ボールスタッド2の揺動時にダストカバー13に引抜方向の荷重がかかっても補強環16の軸線方向の移動がハウジング8の凹部10のハウジング開口部9側端部により規制される。さらに、ハウジング8の凹部10の軸線方向長さ及び補強環16の軸線方向長さを長くすることによりダストカバー13の他方大開口部15をハウジング8の凹部10に固定する力が大きくなるので、ダストカバー13の軸線方向の耐荷重性を高くできる。
【0019】
また、上記の如き組立方法によれば、ダストカバー13の他端大開口部15に埋設された補強環16に凸部17を形成してハウジング8の凹部10に嵌合させることができる。
【0020】
続いて本発明の組立方法における第二の実施例を図8及び図9に基づいて説明する。第二の実施例においては、ダストカバー13の他方大開口部15がハウジング8の凹部10に装着される前の状態で、予備補強環16bが軸線方向略中央部に向けて両端部から漸次縮径して小凸部17bを形成し、小凸部17bは内径がハウジング8の外径より大径である略円筒形状となっている。このような形状の予備補強環16bが埋設されたダストカバー13を第一の実施例と同様に押圧治具51を使用して内径側に押圧して凸部を形成し、ハウジング8の凹部10と嵌合させる。
【0021】
よって第二の実施例によれば、予備補強環16bが予め軸線方向中央に向かって縮径する形状となっているので、押圧治具51で押圧するとき必要な押圧力が低い。
【0022】
【発明の効果】
以上のように本発明によれば、球状の球頭部と球頭部から延出する柄部とを有するボールスタッドと、ボールスタッドの球頭部を包持するベアリングと、ベアリングを保持し、一方端部に内周からボールスタッドの柄部を突出させるハウジング開口部を有するハウジングと、一方小開口部がボールスタッドの柄部外周に装着され他方大開口部がハウジングの外周に装着されるダストカバーとからなるボールジョイントにおいて、ハウジングは外周面に周状の凹部が形成され、ダストカバーの大開口部は内径側に突出する凸部を有する補強環が埋設されており、凸部内径はハウジングの凹部外径より大径でハウジングの外径より小径であり、ダストカバーは補強環の凸部がハウジングの凹部に嵌合した状態で装着されているので、ダストカバー大開口部に埋設された補強環でダストカバーをハウジングに固定できるため、部品点数の増加が抑制でき、また、ダストカバー大開口部をハウジングに押圧することによりダストカバー大開口部がハウジングに固定されるので組立工数の増加も抑制できるとともに、価格の上昇を抑制できる。加えて、ボールスタッドの揺動時にダストカバーに引抜方向の荷重がかかっても補強環の軸線方向の移動がハウジングの凹部のハウジング開口部側端部により規制されるので、ダストカバーに引抜方向の耐荷重性を高く維持できる。さらに、ハウジングの凹部の軸線方向長さを長くすることにより、凹部の深さを深くすることなくダストカバーの引抜方向の耐荷重性を高くすることができるので、ハウジングの凹部における軸線垂直方向の厚みを厚くでき、ハウジングの凹部の強度を維持できる。
【0023】
また、本発明の製造方法によれば、球状の球頭部と球頭部から延出する柄部とを有するボールスタッドと、ボールスタッドの球頭部を包持するベアリングと、ベアリングを保持し、一方端部に内周からボールスタッドの柄部を突出させる開口部を有し外周面に周状の凹部が形成されるハウジングと、一方小開口部がボールスタッドの柄部外周に他方大開口部がハウジングの外周に装着されるダストカバーとからなるボールジョイントの製造方法において、ダストカバーの他方大開口部には予め円筒形でハウジングの外径より大径の内径を有する予備補強環が埋設されており、ハウジングの凹部と予備補強環とを軸線方向同位置に配置後、予備補強環を内径側に押圧して形成した凸部をハウジングの凹部に嵌合させてダストカバーをハウジングに装着させるので、本発明のボールジョイントを実現できる。
【0024】
さらに本発明の製造方法において、予備補強環が軸線方向両端から中央に向けて漸次縮径する形状であると、予備補強環を内径側に押圧してハウジングの凹部に嵌合させるときの必要な押圧力が低いので、容易にボールジョイントを製造できる。
【図面の簡単な説明】
【図1】本発明の実施例によるボールジョイントを表す部分断面平面図である。
【図2】図1のA部拡大図である。
【図3】本発明の実施例によるボールジョイントの第一の組立工程を表す部分断面平面図である。
【図4】本発明の実施例によるボールジョイントの第二の組立工程を表す部分断面平面図である。
【図5】図4のB部拡大図である。
【図6】本発明の実施例によるボールジョイントの第三の組立工程を表す部分断面平面図である。
【図7】図6のC部拡大図である。
【図8】本発明の第二の実施例によるボールジョイントの組立工程を表す部分断面平面図である。
【図9】図8のD部拡大図である。
【図10】従来のボールジョイントを表す部分断面平面図である。
【図11】従来の他のボールジョイントを表す部分断面平面図である。
【符号の説明】
2 ボールスタッド
3 柄部
4 球頭部
6 ベアリング
8 ハウジング
10 凹部
13 ダストカバー
15 (ダストカバー)大開口部
16 補強環
17 凸部
[0001]
[Industrial applications]
The present invention relates to a ball joint used for, for example, a suspension system and a steering system of an automobile, and a method of manufacturing the same.
[0002]
[Prior art]
FIG. 10 shows a conventional ball joint. The ball joint 101 includes a ball stud 102 having a spherical ball head 104 and a handle 103 extending from the ball head 104, and a ball head 104 of the ball stud 102 swingably and rotatably. A bearing 108, a housing 108 including a bearing 106 and having a housing opening 109 on one side for projecting the handle 103 of the ball stud 102 and having a circumferential recess 110 formed on the outer periphery, and a small opening 114 on a ball An annular circlip 116 is fitted on the outer periphery of the handle 103 of the stud 102, and the dust cover 113 has a large opening 115 attached to the recess 110 of the housing 108.
[0003]
In the dust cover 113 mounting step in the ball joint 101, first, the dust cover 113 is press-fitted from the handle 103 side of the ball stud 102, while the small opening 114 is mounted on the handle 103 of the ball stud 102, and the other large opening is used. After the 115 is mounted in the recess 110 of the housing 108, a spiral circlip 116 is fitted around the large opening 115, and the large opening 115 is fixed to the recess 110 of the housing 108.
[0004]
[Problems to be solved by the invention]
In the ball joint 101, a metal circlip 116 is fitted into the large opening 115 of the dust cover 113 in order to improve the load resistance and sealing performance of the dust cover 113 in the pull-out direction, and is fixed to the recess 110 of the housing 108. It had been. Since the circlip 116 is required as described above, the number of parts is increased, and the price is sometimes increased. Further, since a step of fitting the circlip 116 into the large opening 115 of the dust cover 113 is required, the number of assembly steps may be increased. Further, a recess 110 is provided on the outer periphery of the housing 108 for mounting the large opening 115 of the dust cover 113. The large opening 115 of the dust cover 113 is fastened to the recess 110 of the housing 108 with a circlip 116. In order to maintain the pull-out strength, the concave portion 110 needs to have a depth in the radial direction. Therefore, the portion where the concave portion 110 is formed is thinner than other portions, and the strength of the concave portion 110 of the housing 108 is reduced. Sometimes it became weak.
[0005]
FIG. 11 shows another conventional ball joint. A ball joint 201 shown in FIG. 11 has a ball stud 202 including a spherical ball head 204 and a handle 203 extending from the ball head 204, and a ball head 204 of the ball stud 202 swingably rotatable. A bearing 206, a first opening 209 for enclosing the bearing 206 and projecting the handle 204 of the ball stud 202 on one side, and a second opening 211 for caulking and fixing a closing plate 212 on the other side on the other side. The housing 208 and the one small opening 214 are provided on the outer periphery of the handle 203 of the ball stud 202 via the annular ferrule ring 205, and the large opening 215 in which the press-fitting ring 216 is embedded is provided on the outer periphery of the first opening 209 of the housing 208. It consists of a dust cover 213 to be attached to each.
[0006]
In the ball joint 201 as described above, the inside diameter of the large opening 215 of the dust cover 213 and the inside diameter of the press-fit ring 216 are formed to be smaller than the outside diameter of the first opening 209 of the housing 208, and the large opening 215 of the dust bar 213 is formed. The large opening 215 is attached to the outer periphery of the first opening 209 of the housing 208 by press-fitting to the inner periphery thereof. However, since the dust cover 213 is attached to the housing 208 only by the pressure caused by the diameter difference between the inner diameter of the large opening 215 and the press-fitting ring 216 of the dust cover 213 and the outer diameter of the first opening 209 of the housing 208, the ball stud is formed. In some cases, the load resistance in the pull-out direction when a load in the pull-out direction is applied to the dust cover 213 by the swing of the 202 cannot be set high.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a ball joint having a dust cover which solves the above-mentioned problems, is inexpensive, can suppress an increase in the number of processing steps, and has a high load resistance in the drawing direction.
[0008]
[Means for Solving the Problems]
The configuration of the ball joint of the present invention is as follows.
[0009]
A ball stud having a spherical ball head and a handle extending from the ball head, a bearing for enclosing the ball head of the ball stud, and holding the bearing; In a ball joint comprising a housing having a housing opening for projecting a handle, and a dust cover having one small opening mounted on the outer periphery of the handle of the ball stud and the other large opening mounted on the outer circumference of the housing, A peripheral concave portion is formed on the outer peripheral surface, a large opening of the dust cover is buried with a reinforcing ring having a convex portion protruding toward the inner diameter side, and the convex inner diameter is larger than the outer diameter of the concave portion of the housing. The diameter of the dust cover is smaller than the outer diameter, and the dust cover is mounted with the protrusion of the reinforcing ring fitted into the recess of the housing.
[0010]
The method for manufacturing the ball joint according to the present invention is as follows.
[0011]
1. A ball stud having a spherical ball head and a handle extending from the ball head, a bearing for enclosing the ball head of the ball stud, and holding the bearing; A housing having a housing opening for projecting the handle and having a circumferential recess formed on the outer peripheral surface, one small opening is mounted on the outer periphery of the handle of the ball stud, and the other large opening is mounted on the outer circumference of the recess of the housing. In the method of manufacturing a ball joint comprising a dust cover, a spare reinforcing ring having a substantially cylindrical shape and an inner diameter larger than the outer diameter of the housing is embedded in the other large opening of the dust cover in advance, and After arranging the auxiliary reinforcing ring at the same position in the axial direction, the convex portion formed by pressing the auxiliary reinforcing ring toward the inner diameter side is fitted into the concave portion of the housing, and the dust cover is attached to the housing.
[0012]
2. The auxiliary reinforcing ring has a shape whose diameter is gradually reduced from both ends in the axial direction toward the center.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0014]
FIG. 1 shows a ball joint 1 according to an embodiment of the present invention. This ball joint 1 swings a ball stud 2 having a spherical ball head 4 and a handle 3 projecting from the ball head 4 and having a circumferential mounting groove 5, and a ball head 4 of the ball stud 2. A bearing 6 which is movably held and has a bearing opening 7 at one end; a housing opening 9 which encloses the bearing 6 and at one end projects the handle 3 of the ball stud 2 from the inner peripheral side; A housing 8 having a closed bottom portion 11 for closing the end, a shaft portion 12 extending from the bottom portion 11 to the side opposite to the housing opening, and having a circumferential recess 10 formed on the outer peripheral surface, and one small opening portion 14 formed of a ball stud. On the outer periphery of the mounting groove 5, a dust cover 13 is provided in which the other large opening 15 in which the reinforcing ring 16 is embedded is mounted in the recess 10 of the housing 8.
[0015]
The dust cover 13 will be described in detail. The reinforcing ring 16 buried in the large opening 15 of the dust cover 13 has a substantially cylindrical shape made of metal, and the entire length of the reinforcing ring 16 in the axial direction is longer than the axial length of the concave portion 10 of the housing 8 as shown in FIG. The recess 10 is mounted so as to protrude from both ends in the axial direction of the recess 10. Further, the reinforcing ring 16 is formed with a convex portion 17 which gradually decreases in diameter from both ends in the axial direction toward the center and projects toward the inner diameter side. The convex portion 17 has an inner diameter larger than the outer diameter of the concave portion 10 of the housing 8 and smaller than the outer diameter of the housing 8, and is arranged in a state fitted in the concave portion 10 of the housing 8.
[0016]
Next, an assembly process of the ball joint 1 will be described with reference to the drawings.
[0017]
First, the bearing 6 is fitted to the ball head 4 of the ball stud 2, and then the ball stud 2 with the bearing 6 fitted to the ball head 4 is inserted into the housing 8. Thereafter, the ring 14 is inserted from the handle 3 of the ball stud 2 into the inner periphery of the housing opening 9, and the vicinity of the housing opening 9 of the housing 8 is bent toward the axis. Subsequently, the dust cover 13 is inserted from the handle portion 4 of the ball stud 2 as shown in FIG. At this time, in the other large opening 15 of the dust cover 13, a cylindrical auxiliary reinforcing ring 16a having a substantially uniform inner diameter from one end to the other end is embedded. Next, as shown in FIG. 4, one small opening 14 of the dust cover 13 is mounted on the outer periphery of the mounting groove 5 of the ball stud 2, and as shown in FIG. 10 so as to be at the same position in the axial direction. Next, as shown in FIGS. 6 and 7, the large opening 15 of the dust cover 13 is pressed toward the inner diameter side by the pressing jig 51. The jig 51 is disposed radially outside the dust cover 13 at the same axial position as the other large opening 15 of the dust cover 13, and the pressing portion 52, which is the end surface of the jig 51 on the dust cover 13 side, is completed. Is substantially the same as the outer peripheral shape of the reinforcing ring 16 in the ball joint 1 of FIG. By being pressed by the jig 51, the other large opening 15 and the preliminary reinforcing ring 16 a of the dust cover 13 are deformed to the inner diameter side according to the shape of the pressing portion 52 of the pressing jig 51, and Is formed from the both ends in the axial direction toward the center in the axial direction to form a convex portion 17 projecting toward the inner diameter side, and the formed convex portion 17 of the reinforcing ring 16 fits into the concave portion 10 of the housing 8. Thereby, the ball joint 1 as shown in FIG. 1 is completed. At this time, both ends of the reinforcing ring 16 protrude from the recess 10.
[0018]
Therefore, according to the ball joint 1 as described above, the convex portion 17 of the reinforcing ring 16 embedded in the other large opening 15 of the dust cover 13 fits into the concave portion 10 of the housing 8. Can be fixed to the housing 8. Also, even if a load in the pull-out direction is applied to the dust cover 13 when the ball stud 2 swings, the axial movement of the reinforcing ring 16 is restricted by the end of the recess 10 of the housing 8 on the housing opening 9 side. Further, by increasing the axial length of the concave portion 10 of the housing 8 and the axial length of the reinforcing ring 16, the force for fixing the other large opening 15 of the dust cover 13 to the concave portion 10 of the housing 8 increases. The load resistance in the axial direction of the dust cover 13 can be increased.
[0019]
Further, according to the assembling method as described above, the convex portion 17 can be formed on the reinforcing ring 16 embedded in the other large opening portion 15 of the dust cover 13 and fitted into the concave portion 10 of the housing 8.
[0020]
Next, a second embodiment of the assembling method according to the present invention will be described with reference to FIGS. In the second embodiment, before the other large opening 15 of the dust cover 13 is attached to the concave portion 10 of the housing 8, the auxiliary reinforcing ring 16b is gradually contracted from both ends toward the substantially central portion in the axial direction. The small convex portion 17b is formed to have a substantially cylindrical shape whose inner diameter is larger than the outer diameter of the housing 8. The dust cover 13 in which the auxiliary reinforcing ring 16b having such a shape is embedded is pressed to the inner diameter side using the pressing jig 51 in the same manner as in the first embodiment to form a convex portion, and the concave portion 10 of the housing 8 is formed. To be fitted.
[0021]
Therefore, according to the second embodiment, since the auxiliary reinforcing ring 16b is previously reduced in diameter toward the center in the axial direction, the pressing force required when pressing with the pressing jig 51 is low.
[0022]
【The invention's effect】
As described above, according to the present invention, a ball stud having a spherical ball head and a handle extending from the ball head, a bearing enclosing the ball head of the ball stud, and holding the bearing, A housing having a housing opening at one end for projecting the handle of the ball stud from the inner circumference, and dust having one small opening mounted on the outer circumference of the handle of the ball stud and the other large opening mounted on the outer circumference of the housing. In a ball joint composed of a cover and a housing, a peripheral concave portion is formed on the outer peripheral surface, and a large opening portion of the dust cover is buried with a reinforcing ring having a convex portion projecting toward the inner diameter side. The diameter of the dust cover is larger than the outer diameter of the recess and smaller than the outer diameter of the housing, and the dust cover is mounted with the protrusion of the reinforcing ring fitted into the recess of the housing. Since the dust cover can be fixed to the housing with the reinforcing ring embedded in the opening, increase in the number of parts can be suppressed, and the large dust cover opening is fixed to the housing by pressing the large dust cover opening against the housing. Therefore, an increase in the number of assembly steps can be suppressed, and an increase in the price can be suppressed. In addition, even if a load in the pull-out direction is applied to the dust cover when the ball stud swings, the axial movement of the reinforcing ring is restricted by the housing opening side end of the concave portion of the housing. High load resistance can be maintained. Further, by increasing the axial length of the concave portion of the housing, the load resistance in the pull-out direction of the dust cover can be increased without increasing the depth of the concave portion. The thickness can be increased, and the strength of the concave portion of the housing can be maintained.
[0023]
Further, according to the production method of the present invention, a ball stud having a spherical ball head and a handle extending from the ball head, a bearing for enclosing the ball head of the ball stud, and a bearing are held. A housing having an opening at one end for projecting the handle of the ball stud from the inner periphery and having a circumferential recess formed on the outer peripheral surface; and one small opening having the other large opening at the outer periphery of the handle of the ball stud. In a method of manufacturing a ball joint comprising a dust cover whose part is mounted on the outer periphery of the housing, a spare reinforcing ring having a cylindrical shape and an inner diameter larger than the outer diameter of the housing is embedded in the other large opening of the dust cover in advance. After the concave portion of the housing and the auxiliary reinforcing ring are arranged at the same position in the axial direction, the convex portion formed by pressing the auxiliary reinforcing ring toward the inner diameter side is fitted into the concave portion of the housing, and the dust cover is attached to the housing. Since the mounted, it can be realized a ball joint of the present invention.
[0024]
Furthermore, in the manufacturing method of the present invention, when the preliminary reinforcing ring has a shape whose diameter is gradually reduced from both ends in the axial direction toward the center, it is necessary to press the preliminary reinforcing ring toward the inner diameter side and fit it into the recess of the housing. Since the pressing force is low, a ball joint can be easily manufactured.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional plan view illustrating a ball joint according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a partial cross-sectional plan view illustrating a first assembly process of the ball joint according to the embodiment of the present invention.
FIG. 4 is a partial cross-sectional plan view illustrating a second assembly process of the ball joint according to the embodiment of the present invention.
FIG. 5 is an enlarged view of a portion B in FIG. 4;
FIG. 6 is a partial sectional plan view illustrating a third assembling step of the ball joint according to the embodiment of the present invention.
FIG. 7 is an enlarged view of a portion C in FIG. 6;
FIG. 8 is a partial sectional plan view showing an assembling process of a ball joint according to a second embodiment of the present invention.
FIG. 9 is an enlarged view of a part D in FIG. 8;
FIG. 10 is a partial sectional plan view showing a conventional ball joint.
FIG. 11 is a partial sectional plan view showing another conventional ball joint.
[Explanation of symbols]
2 ball stud 3 handle 4 ball head 6 bearing 8 housing 10 recess 13 dust cover 15 (dust cover) large opening 16 reinforcing ring 17 convex

Claims (3)

球状の球頭部(4)と該球頭部(4)から延出する柄部(3)とを有するボールスタッド(2)と、該ボールスタッド(2)の球頭部(4)を包持するベアリング(6)と、該ベアリング(6)を保持し、一方端部に内周から前記ボールスタッド(2)の柄部(3)を突出させるハウジング開口部(9)を有するハウジング(8)と、一方小開口部(14)が前記ボールスタッド(2)の柄部(3)外周に装着され他方大開口部(15)が前記ハウジング(8)の外周に装着されるダストカバー(13)とからなるボールジョイントにおいて、前記ハウジング(8)は外周面に周状の凹部(10)が形成され、前記ダストカバー(13)の他方大開口部(15)は内径側に突出する凸部(17)を有する補強環(16)が埋設されており、該凸部(17)内径は前記ハウジング(8)の凹部(10)外径より大径で前記ハウジング(8)の外径より小径であり、前記ダストカバー(13)は前記補強環(16)の凸部(17)が前記ハウジング(8)の凹部(10)に嵌合した状態で装着されていることを特徴とするボールジョイント。A ball stud (2) having a spherical ball head (4) and a handle (3) extending from the ball head (4), and a ball head (4) of the ball stud (2) is wrapped. A housing (8) having a bearing (6) to be held and a housing opening (9) for holding the bearing (6) and projecting a handle (3) of the ball stud (2) from an inner periphery at one end. ) And a dust cover (13) in which one small opening (14) is attached to the outer periphery of the handle (3) of the ball stud (2) and the other large opening (15) is attached to the outer periphery of the housing (8). ), The housing (8) has a circumferential concave portion (10) formed on the outer peripheral surface thereof, and the other large opening (15) of the dust cover (13) has a convex portion protruding toward the inner diameter side. A reinforcing ring (16) having (17) is embedded therein; The inner diameter of the portion (17) is larger than the outer diameter of the recess (10) of the housing (8) and smaller than the outer diameter of the housing (8), and the dust cover (13) is a convex of the reinforcing ring (16). A ball joint, wherein the portion (17) is mounted in a state of being fitted into the concave portion (10) of the housing (8). 球状の球頭部(4)と該球頭部(4)から延出する柄部(3)とを有するボールスタッド(2)と、該ボールスタッド(2)の球頭部(4)を包持するベアリング(6)と、該ベアリング(6)を保持し、一方端部に内周から前記ボールスタッド(2)の柄部(3)を突出させるハウジング開口部(9)を有し外周面に周状の凹部(10)が形成されるハウジング(8)と、一方小開口部(14)が前記ボールスタッド(2)の柄部(3)外周に他方大開口部(15)が前記ハウジング(8)の凹部(10)外周に装着されるダストカバー(13)とからなるボールジョイントの製造方法において、前記ダストカバー(13)の他方大開口部(15)には予め略円筒形で前記ハウジング(8)の外径より大径の内径を有する予備補強環(16a)が埋設されており、前記ハウジング(8)の凹部(10)と前記予備補強環(16a)とを軸線方向同位置に配置後、前記予備補強環(16a)を内径側に押圧して形成した凸部(17)を前記ハウジング(8)の凹部(10)に嵌合させて前記ダストカバー(13)を前記ハウジング(8)に装着させることを特徴とするボールジョイントの製造方法。A ball stud (2) having a spherical ball head (4) and a handle (3) extending from the ball head (4), and a ball head (4) of the ball stud (2) is wrapped. A bearing (6) to be carried, and a housing opening (9) for holding the bearing (6) and projecting a handle (3) of the ball stud (2) from the inner periphery at one end; A housing (8) having a circumferential recess (10) formed therein, one small opening (14) being on the outer periphery of the handle (3) of the ball stud (2) and the other large opening (15) being provided on the housing. (8) In the method for manufacturing a ball joint comprising a dust cover (13) attached to the outer periphery of the concave portion (10), the other large opening (15) of the dust cover (13) has a substantially cylindrical shape in advance. A spare reinforcing ring (16) having an inner diameter larger than the outer diameter of the housing (8) ) Is buried, and after the concave portion (10) of the housing (8) and the auxiliary reinforcing ring (16a) are arranged at the same position in the axial direction, the auxiliary reinforcing ring (16a) is pressed toward the inner diameter side. A method for manufacturing a ball joint, comprising: fitting the projected portion (17) into the recess (10) of the housing (8) and mounting the dust cover (13) to the housing (8). 前記予備補強環(16a)は、軸線方向両端から中央に向けて漸次縮径する形状であることを特徴とする請求項2記載のボールジョイントの製造方法。The method for manufacturing a ball joint according to claim 2, wherein the auxiliary reinforcing ring (16a) has a shape whose diameter is gradually reduced from both ends in the axial direction toward the center.
JP2002222708A 2002-07-31 2002-07-31 Ball joint Pending JP2004060839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002222708A JP2004060839A (en) 2002-07-31 2002-07-31 Ball joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002222708A JP2004060839A (en) 2002-07-31 2002-07-31 Ball joint

Publications (2)

Publication Number Publication Date
JP2004060839A true JP2004060839A (en) 2004-02-26
JP2004060839A5 JP2004060839A5 (en) 2005-09-02

Family

ID=31942663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002222708A Pending JP2004060839A (en) 2002-07-31 2002-07-31 Ball joint

Country Status (1)

Country Link
JP (1) JP2004060839A (en)

Similar Documents

Publication Publication Date Title
JP4097118B2 (en) Ball joint
US20060188324A1 (en) Joint structure of ball joint and arm
JP2004011782A (en) Ball joint
JP2004060839A (en) Ball joint
JP4404307B2 (en) Ball joint
JP4257731B2 (en) Ball joint and manufacturing method thereof
JP3973347B2 (en) Connection structure of ball joint and arm
JP4462995B2 (en) Ball joint
JP4596516B2 (en) Ball joint molding equipment
JP2945511B2 (en) Oil seal manufacturing method
JP3344689B2 (en) Connection structure between ball joint and arm
JP4069269B2 (en) Ball joint
JP2004092776A (en) Dust cover for ball joint
JP2004044651A (en) Connecting structure of ball joint and arm
JP2004116546A (en) Ball joint
JP2002031126A5 (en)
JP2002372034A (en) Connecting method of ball joint to arm
JPH0545226U (en) Ball joint
JP2002070831A (en) Joint structure for ball joint and arm
JPH0260442A (en) Manufacture of rotor for brushless motor
JP2002122128A (en) Ball joint
JP2001241428A (en) Ball joint
JP2001065541A (en) Ball joint
JPH0728247U (en) Sliding bush
JPH09151935A (en) Ball joint

Legal Events

Date Code Title Description
A521 Written amendment

Effective date: 20050225

Free format text: JAPANESE INTERMEDIATE CODE: A523

A621 Written request for application examination

Effective date: 20050225

Free format text: JAPANESE INTERMEDIATE CODE: A621

A977 Report on retrieval

Effective date: 20071225

Free format text: JAPANESE INTERMEDIATE CODE: A971007

A131 Notification of reasons for refusal

Effective date: 20071226

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080220

A02 Decision of refusal

Effective date: 20080626

Free format text: JAPANESE INTERMEDIATE CODE: A02