JPH0318054B2 - - Google Patents
Info
- Publication number
- JPH0318054B2 JPH0318054B2 JP1423886A JP1423886A JPH0318054B2 JP H0318054 B2 JPH0318054 B2 JP H0318054B2 JP 1423886 A JP1423886 A JP 1423886A JP 1423886 A JP1423886 A JP 1423886A JP H0318054 B2 JPH0318054 B2 JP H0318054B2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- cylindrical
- flange
- bearing
- ball
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Pivots And Pivotal Connections (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、自動車懸架装置等に使用されるテン
シヨンタイプのボールジヨイントに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tension-type ball joint used in automobile suspension systems and the like.
従来の技術
合成樹脂製の軸受を用いた耐高荷重ボールジヨ
イントとしては、実開昭57−203135号および実開
昭57−203136号の如く、樹脂軸受の厚さを減じ、
かつ突き当ておよび圧入フランジ部を設けて高荷
重下における樹脂軸受のフローを防止するものが
ある。Conventional technology As for high load bearing ball joints using synthetic resin bearings, as in Utility Model Application No. 57-203135 and Utility Model Application No. 57-203136, the thickness of the resin bearing is reduced.
In addition, some bearings are provided with an abutment and a press-fit flange portion to prevent the resin bearing from flowing under high loads.
発明が解決しようとする問題点
ボールジヨイントの低作動トルクおよび耐高荷
重性能に関する要求は増々厳しく、特に圧入フラ
ンジ部にスリツトを設けることすら、フロー阻止
効果を高める上で中止せざるを得ない状況にあ
る。Problems to be Solved by the Invention The requirements regarding the low operating torque and high load capacity of ball joints are becoming increasingly strict, and even the provision of slits in the press-fit flange has to be discontinued in order to improve the flow blocking effect. situation.
しかし軸受の圧入フランジのスリツトを廃止す
ると、耐荷重性を高めるため軸受の赤道部の肉厚
は既に極薄で、射出成形時に雄型の無理抜き不能
であるため、軸受赤道部よりも頭頂側に球頭部を
抱き込む抱き込み部を一体に成形できなく成る問
題等があり、実質的にスリツト廃止は困難であつ
た。 However, if the slit in the press-fit flange of the bearing is abolished, the wall thickness of the equatorial part of the bearing is already extremely thin in order to increase load resistance, and it is impossible to forcefully pull out the male die during injection molding. However, there was the problem that the holding part that holds the ball head could not be integrally molded, and it was practically difficult to eliminate the slit.
なお、抱き込み部はハウジング軸線直角方向の
ガタ発生を防止する上で欠くことができない。 Note that the holding portion is indispensable for preventing play in the direction perpendicular to the axis of the housing.
問題点を解決するための手段
ハウジング開口側のハウジング内周にハウジン
グ軸線方向に球頭部の赤道を少し越えて延びる円
筒座と、円筒座より大型の大型円筒部を段部面を
介して連接し、また円筒座に適合される合成樹脂
製の開口側軸受の赤道部の頭頂側に、自由状態に
おいて略軸線平行円筒状内周面を具えた極薄の円
筒部を形成し、円筒部に略截頭円錐形に拡大する
フランジ肩を介して厚肉の外周部分を具えたフラ
ンジ部を連接し、かつ円筒部の長さを、段部面と
フランジ肩との間に隙間を形成しうる程度にする
と共に、ハウジング大型円筒部とフランジ部とに
大きな締代を設け、また組立状態において段部面
とフランジ肩とを隙間をもつて対向させる。Measures to solve the problem A cylindrical seat that extends slightly beyond the equator of the ball head in the axial direction of the housing is connected to the inner periphery of the housing on the housing opening side via a stepped surface. In addition, an extremely thin cylindrical part with a cylindrical inner peripheral surface that is approximately parallel to the axis in a free state is formed on the top side of the equator of the open side bearing made of synthetic resin that is compatible with the cylindrical seat. A flange portion having a thick outer peripheral portion is connected via a flange shoulder that expands into a substantially truncated conical shape, and the length of the cylindrical portion is such that a gap can be formed between the step surface and the flange shoulder. In addition, a large interference is provided between the large cylindrical portion of the housing and the flange portion, and the stepped portion surface and the flange shoulder are opposed to each other with a gap in the assembled state.
作 用
ハウジング段部面とフランジ肩部との間に隙間
が形成されるため、抱き込み部が弾性的に押し拡
げられる余裕をもたらされるので、ハウジングに
軸受を圧入した後の球頭部挿入が軸受要部の塑性
変形を起こすことなく実施可能になり、かつその
隙間と締代が協働してボールジヨイント組立状態
において、軸受円筒部を湾曲させて球頭部の赤道
部よりも先端側を抱き込んで球頭部を保持させる
とともに軸受赤道部と球頭部との対向面の接面圧
力を低減させる。Function: A gap is formed between the stepped surface of the housing and the shoulder of the flange, which provides room for the holding part to expand elastically, making it easier to insert the ball head after press-fitting the bearing into the housing. This can be done without causing plastic deformation of the main part of the bearing, and the clearance and interference work together to curve the cylindrical part of the bearing in the assembled state of the ball joint, so that the cylindrical part of the bearing is curved to the tip side of the equator of the ball head. The ball head is held by holding the ball head, and the contact pressure between the facing surface of the bearing equator and the ball head is reduced.
実施例
以下本発明の実施例のその構成を図面によつて
説明する。Embodiment The structure of an embodiment of the present invention will be explained below with reference to the drawings.
第１図はテンシヨンタイプのボールジヨイント
１を表すもので、第２図はその一部拡大断面説明
図である。図において２はボールスタツドで軸部
３の一端に球頭部４を有する。 FIG. 1 shows a tension type ball joint 1, and FIG. 2 is a partially enlarged sectional view of the same. In the figure, 2 is a ball stud having a ball head 4 at one end of a shaft portion 3.
６はハウジングで開口に隣接する内周にボール
スタツド球頭部４に関して略接線方向に延びる円
錐状の円錐座９と、その円錐座９の大径側に接続
されたハウジング軸線方向に円筒状に延びる円筒
座１０とを有するとともに、その円筒座１０が球
頭頂部側まで球頭部４の赤道部を少し越えて形成
されている。 Reference numeral 6 denotes a housing with a conical seat 9 extending substantially tangentially to the ball stud spherical head 4 on the inner periphery adjacent to the opening, and a cylindrical conical seat 9 extending in the axial direction of the housing connected to the large diameter side of the conical seat 9. It has an extending cylindrical seat 10, and the cylindrical seat 10 is formed slightly beyond the equator of the spherical head 4 to the top side of the spherical head.
円筒座１０の下端には截頭円錐状の段部面１１
が接続されかつその大径側に大径円筒部１２が形
成されている。 The lower end of the cylindrical seat 10 has a truncated conical stepped surface 11.
are connected to each other, and a large-diameter cylindrical portion 12 is formed on the large-diameter side thereof.
円錐座９の傾斜とハウジング軸線との交差角θ
は実施例においては約52度に設定され、かつ円錐
座９および円筒座１０とボールスタツド球頭部４
との最接近部分の対向隙間は極小にされなければ
ならず、実施例においては約0.8mm程度に設定さ
れている。 Intersection angle θ between the inclination of the conical seat 9 and the housing axis
is set at about 52 degrees in the embodiment, and the conical seat 9, the cylindrical seat 10 and the ball stud spherical head 4
The opposing gap at the closest portion must be minimized, and in the embodiment is set to about 0.8 mm.
１９は高荷重負担側の合成樹脂製の軸受で、内
周がボールスタツド球頭部４の軸部側に適合さ
れ、外周がハウジング６の円錐座９と円筒座１０
および大径円筒部１２に適合されている。 Reference numeral 19 denotes a bearing made of synthetic resin on the high load bearing side, the inner circumference of which is adapted to the shaft side of the ball stud head 4, and the outer circumference of which is fitted to the conical seat 9 and cylindrical seat 10 of the housing 6.
and is adapted to the large diameter cylindrical portion 12.
この軸受１９は、円錐座９と円筒座１０との交
わる付近で最大の厚肉部分となつている肩部２１
と、円錐座９と球頭部４との最接近部で極薄の肉
厚となつている開口縁部２４と、円筒座１０と球
頭部４との最接近部で上記開口縁部２４と同程度
の極薄の肉厚となつている赤道部２５と、赤道部
２４の下方に接続された円筒部２２および、円筒
部２２に接続され下方に向け截頭円錐状に拡径す
るフランジ肩２７部分と厚肉の外周部分を備えた
フランジ部２３とから構成されている。 This bearing 19 has a shoulder portion 21 which is the thickest part near the intersection of the conical seat 9 and the cylindrical seat 10.
, an opening edge 24 having an extremely thin wall thickness at the closest point between the conical seat 9 and the spherical head 4, and an opening edge 24 at the closest point between the cylindrical seat 10 and the spherical head 4. an equatorial portion 25 having an extremely thin wall thickness comparable to that of the cylindrical portion 25, a cylindrical portion 22 connected below the equatorial portion 24, and a flange that is connected to the cylindrical portion 22 and expands in diameter in a truncated conical shape downward. It is composed of a shoulder 27 portion and a flange portion 23 having a thick outer peripheral portion.
したがつて軸受１９の厚肉の肩部２１の両側
は、球頭部４との最接近部で極薄の肉厚となる楔
状を呈する。 Therefore, both sides of the thick shoulder portion 21 of the bearing 19 are wedge-shaped, with the wall thickness being extremely thin at the portion closest to the ball head 4.
また、軸受１９の肩部２１の内周面である受座
面２０は、球頭部４の略中心から見て前記円錐座
９と円筒座１０の交点方向で球頭部４に最も強く
接する球頭部半径R1より半径R2の大きなトロイ
ダル曲面に形成されている。 Further, the seat surface 20, which is the inner peripheral surface of the shoulder portion 21 of the bearing 19, contacts the ball head 4 most strongly in the direction of the intersection of the conical seat 9 and the cylindrical seat 10 when viewed from approximately the center of the ball head 4. It is formed into a toroidal curved surface with a radius R 2 larger than the radius R 1 of the spherical head.
すなわち、トロイダル曲面の仮想中心O2は、
球頭部中心O1よりも、球頭部先端側に位置し、
かつハウジング中心軸線から半径方向に離れた所
に位置することになる。 In other words, the virtual center O 2 of the toroidal surface is
Located closer to the tip of the ball head than the center of the ball head O1 ,
and is located at a location radially away from the central axis of the housing.
そのため、球頭部の頭部球面５は、軸受の開口
縁部２４および赤道部２５において隙間２４，１
８を生じるか、または厚肉の肩部２１より弱く接
触する傾向に成る。 Therefore, the head spherical surface 5 of the spherical head has gaps 24 and 1 at the opening edge 24 and the equatorial portion 25 of the bearing.
8 or tend to contact weaker than the thicker shoulder 21.
この軸受１９のフランジ部２３は、円錐座９に
軸受の対向面が密接した状態にセツトされかつハ
ウジング６に軸受１９が確実強固に固定されるよ
う、フランジ肩２７とハウジング段部面１１との
間に隙間Ｌが設けられていると共に、二点鎖線で
示される如くその自由状態から締代Ｐをもつて大
径円筒部１２に圧入される。 The flange portion 23 of the bearing 19 has a flange shoulder 27 and a stepped housing surface 11 so that the facing surface of the bearing is set in close contact with the conical seat 9 and the bearing 19 is securely and firmly fixed to the housing 6. A gap L is provided therebetween, and it is press-fitted into the large-diameter cylindrical portion 12 from its free state with a tightening allowance P, as shown by the two-dot chain line.
そしてこのフランジ部２３の締代Ｐと隙間Ｌ
は、軸受の圧入に伴つて、自由状態では略軸線平
行円筒内外周面を具えていた円筒部２２が湾曲し
て球頭部の赤道部２５よりも球頭部先端側を抱き
込んで球頭部４を保持する抱き込み部２６を形成
する。また、このようにフランジ部２３をハウジ
ング６の大径円筒部２３に圧入した際に、ハウジ
ング６の段部面１１とフランジ肩２７との対向面
間には、隙間Ｌが形成され、続くボールスタツド
球頭部４を軸受１９内に圧入する場合に抱き込み
部２６が弾性的に押し拡げられる余裕をもたらし
ている。 And the tightening amount P and the clearance L of this flange portion 23
As the bearing is press-fitted, the cylindrical part 22, which in the free state has inner and outer circumferential surfaces of a cylinder parallel to the axis, curves and embraces the tip side of the ball head more than the equatorial part 25 of the ball head, forming a ball head. A holding part 26 for holding the part 4 is formed. Furthermore, when the flange portion 23 is press-fitted into the large-diameter cylindrical portion 23 of the housing 6 in this way, a gap L is formed between the facing surfaces of the step surface 11 of the housing 6 and the flange shoulder 27, and the subsequent ball When the stud ball head 4 is press-fitted into the bearing 19, there is a margin in which the holding portion 26 can be elastically expanded.
しかも抱き込み部２６が形成されることによ
り、軸受１９の赤道部２５は対向する頭部球面５
から離隔する方向へ湾曲する力を受け、その分そ
の間の接面圧力が低下しボールスタツド運動トル
クの低減に有効に作用する。 Moreover, by forming the enclosing portion 26, the equatorial portion 25 of the bearing 19 is
The ball stud receives a bending force in the direction away from the ball stud, and the contact pressure between the two is reduced by that amount, which effectively works to reduce the ball stud motion torque.
１６は摩耗補償側の軸受で、荷重負担が少ない
ためウレタンラバーなどで形成され、摺動部の摩
耗吸収のため軸線方向に圧縮された状態に組立て
られている。 Reference numeral 16 denotes a bearing on the wear compensation side, which is made of urethane rubber or the like because it bears less load, and is assembled in a compressed state in the axial direction to absorb wear on the sliding part.
上記両軸受１９，１６と球頭部４との摺動部に
は、グリース等適当な潤滑油が塗付されている。 The sliding portions between the two bearings 19, 16 and the ball head 4 are coated with a suitable lubricating oil such as grease.
１５はハウジング６の一端を閉鎖する閉止板
で、ハウジング縁部をローラ等で変形することで
加締め固定されている。 A closing plate 15 closes one end of the housing 6, and is crimped and fixed by deforming the edge of the housing with a roller or the like.
つぎに上記ボールジヨイント１の組立について
説明する。 Next, the assembly of the ball joint 1 will be explained.
まず、ハウジング６に軸受１９を圧入し、フラ
ンジ部２３を大径円筒部１２に強固に結合させる
と共に、軸受１９を円錐座９に密接させる。つい
で軸受１９内面に潤滑油を塗付した後、軸受１９
にボールスタツド球頭部を適合せしめ、さらに球
頭部４に他方の軸受１６をセツトし、最後に閉止
板１５をハウジング６に加熱固定する。 First, the bearing 19 is press-fitted into the housing 6, the flange portion 23 is firmly connected to the large diameter cylindrical portion 12, and the bearing 19 is brought into close contact with the conical seat 9. Next, after applying lubricating oil to the inner surface of the bearing 19,
The ball stud ball head is fitted to the ball head 4, the other bearing 16 is set on the ball head 4, and finally the closing plate 15 is heat-fixed to the housing 6.
効 果
以上のように本発明によれば、ハウジング段部
面とフランジ肩部との間に隙間が形成されるた
め、抱み込み部が弾性部に押し拡げられる余裕を
もたらされるので、ハウジングに軸受を圧入した
後の球頭部挿入が軸受要部の塑性変形を起こすこ
となく実施可能になりかつその隙間と締代が協働
してボールジヨイント組立状態において、軸受円
筒部を湾曲させて球頭部の赤道部よりも先端側を
抱き込んで球頭部を保持させるとともに軸受赤道
部と球頭部と対向面の接面圧力を低減させるの
で、ボールジヨイントの低作動トルクを保持しつ
つ耐高荷重性能を高めることができる。Effects As described above, according to the present invention, a gap is formed between the step surface of the housing and the shoulder of the flange, which provides room for the holding part to be pushed and expanded by the elastic part, so that the housing After the bearing is press-fitted, the ball head can be inserted without causing plastic deformation of the main part of the bearing, and the gap and interference work together to bend the cylindrical part of the bearing when the ball joint is assembled. The ball head is held by holding the tip side of the ball head more than the equator part, and the contact pressure between the bearing equator part, the ball head, and the facing surface is reduced, so the ball joint maintains a low operating torque. At the same time, high load resistance can be improved.
第１図は本発明の実施例を表すもので、テンシ
ヨンタイプのボールジヨイントの断面平面図。第
２図は第１図の一部拡大断面説明図である。
（記号の説明）、１……ボールジヨイント、２…
…ボールスタツド、４……球頭部、７……開口、
１０……円筒座、１１……段部面、１２……大径
円筒部、１６，１９……軸受、２２……円筒部、
２３……フランジ部、２５……赤道部、２６……
抱き込み部、２７……フランジ肩、Ｌ……隙間、
Ｐ……締代。
FIG. 1 shows an embodiment of the present invention, and is a sectional plan view of a tension type ball joint. FIG. 2 is a partially enlarged sectional view of FIG. 1. (Explanation of symbols), 1...Ball joint, 2...
...Ball stud, 4...Ball head, 7...Opening,
10... Cylindrical seat, 11... Stepped surface, 12... Large diameter cylindrical part, 16, 19... Bearing, 22... Cylindrical part,
23...Flange part, 25...Equatorial part, 26...
Embrace part, 27...Flange shoulder, L...Gap,
P...Shimedai.
Claims (1)
内にボールスタツド２一端の球頭部４を前記開口
側と閉鎖側に分割された軸受１９，１６を介して
揺動自在に支持したボールジヨイントにおいて、
前記ハウジング開口７側のハウジング内周に該ハ
ウジング軸線方向に前記球頭部４の赤道を少し越
えて延びる円筒座１０と、該円筒座１０より大径
の大径円筒部１２を段部面１１を介して連設し、
また前記円筒座１０に適合される合成樹脂製の前
記開口側軸受１９の赤道部２５の頭頂側に、自由
状態において略軸線平行円筒状内周面を具えた極
薄の円筒部２２を形成し、該円筒部２２に略截頭
円錐形に拡大するフランジ肩２７を介して厚肉の
外周部分を具えたフランジ部２３を連設し、かつ
前記円筒部２２の長さを、前記段部面１１とフラ
ンジ肩２７との間に隙間Ｌを形成しうる程度にす
ると共に、前記ハウジング大径円筒部１２と前記
フランジ部２３とに大きな締代Ｐを設け、また組
立状態において前記段部面１１とフランジ肩２７
とを前記隙間Ｌをもつて対向させたことを特徴と
するテンシヨンタイプのボールジヨイント。1 Housing 6 with one end open and the other end closed
A ball joint in which a ball head 4 at one end of a ball stud 2 is swingably supported via bearings 19 and 16 divided into the opening side and the closing side,
A cylindrical seat 10 extending slightly beyond the equator of the spherical head 4 in the axial direction of the housing is provided on the inner periphery of the housing on the housing opening 7 side, and a large diameter cylindrical portion 12 having a larger diameter than the cylindrical seat 10 is provided on a step surface 11. connected via
Further, on the top side of the equatorial portion 25 of the open-side bearing 19 made of synthetic resin and adapted to the cylindrical seat 10, an extremely thin cylindrical portion 22 having a cylindrical inner circumferential surface substantially parallel to the axis in a free state is formed. , a flange portion 23 having a thick outer peripheral portion is connected to the cylindrical portion 22 via a flange shoulder 27 expanding into a substantially truncated conical shape, and the length of the cylindrical portion 22 is set to the step surface. 11 and the flange shoulder 27, and a large tightening allowance P is provided between the housing large-diameter cylindrical portion 12 and the flange portion 23, and the step surface 11 is formed in the assembled state. and flange shoulder 27
A tension type ball joint characterized in that the two are opposed to each other with the gap L between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1423886A JPS62171513A (en) | 1986-01-24 | 1986-01-24 | Ball joint of tension type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1423886A JPS62171513A (en) | 1986-01-24 | 1986-01-24 | Ball joint of tension type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62171513A JPS62171513A (en) | 1987-07-28 |
| JPH0318054B2 true JPH0318054B2 (en) | 1991-03-11 |
Family
ID=11855501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1423886A Granted JPS62171513A (en) | 1986-01-24 | 1986-01-24 | Ball joint of tension type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62171513A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213710A (en) * | 1989-12-27 | 1991-09-19 | T R W S I Kk | Ball joint |
-
1986
- 1986-01-24 JP JP1423886A patent/JPS62171513A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62171513A (en) | 1987-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |