JP4964663B2 - Ball joint - Google Patents

Ball joint Download PDF

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JP4964663B2
JP4964663B2 JP2007122105A JP2007122105A JP4964663B2 JP 4964663 B2 JP4964663 B2 JP 4964663B2 JP 2007122105 A JP2007122105 A JP 2007122105A JP 2007122105 A JP2007122105 A JP 2007122105A JP 4964663 B2 JP4964663 B2 JP 4964663B2
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ring
housing
seat
peripheral surface
outer diameter
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JP2008008484A (en
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康弘 近藤
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Musashi Seimitsu Industry Co Ltd
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Musashi Seimitsu Industry Co Ltd
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Priority to JP2007122105A priority Critical patent/JP4964663B2/en
Priority to DE200710024925 priority patent/DE102007024925A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0666—Sealing means between the socket and the inner member shaft
    • F16C11/0671—Sealing means between the socket and the inner member shaft allowing operative relative movement of joint parts due to flexing of the sealing means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0614—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part of the joint being open on two sides

Description

本発明は、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に関する。   The present invention relates to a ball joint used for a suspension device and a steering device of an automobile.

従来より、自動車の懸架装置及び操舵装置等に使用されるアームのアーム開口に圧入されるボールジョイントは、球状の球頭部と球頭部から突出する柄部とを有する金属製のボールスタッドと、ボールスタッドの球頭部を揺動回動自在に包持する合成樹脂製のシートと、シートを内包し、ボールスタッドの柄部を突出させるハウジング開口を有する金属製のハウジングと、シートとハウジングの間でシートを径方向内向きに押圧するリングと、を備え、このボールスタッド、シート、ハウジング及びリングが一体に組み付けられている。   2. Description of the Related Art Conventionally, a ball joint press-fitted into an arm opening of an arm used for a suspension device, a steering device, etc. of an automobile includes a metal ball stud having a spherical ball head and a handle protruding from the ball head. , A synthetic resin sheet that slidably pivotally holds the ball head of the ball stud, a metal housing having a housing opening that encloses the sheet and protrudes the handle of the ball stud, and the sheet and housing And a ring for pressing the seat radially inward, and the ball stud, the seat, the housing and the ring are assembled together.

ここで、シートとボールスタッドの球頭部の間に所望する揺動回転トルクを発生させるため、シートの外径は、リングの内径よりも大きく、シートの厚みは、リングと球頭部との間の距離より大きく設定されている。そのため、金属製のリングを合成樹脂製のシートの外周面に圧入すると、金属製のリングの内表面が合成樹脂製のシートの外表面を径方向内向きに押圧し、シートの内表面がボールスタッドの球頭部に圧接する。この圧接によって、シートとボールスタッドの球頭部の間には所望する揺動回転トルクが発生する。
特開２００５−５４８８２号 Here, in order to generate a desired swinging torque between the seat and the ball stud, the outer diameter of the seat is larger than the inner diameter of the ring, and the thickness of the seat is between the ring and the ball head. It is set larger than the distance between. Therefore, when a metal ring is press-fitted into the outer peripheral surface of a synthetic resin sheet, the inner surface of the metal ring presses the outer surface of the synthetic resin sheet radially inward, and the inner surface of the sheet is a ball. Press contact with ball head of stud. By this pressure contact, a desired rotational torque is generated between the seat and the ball head of the ball stud.
JP 2005-54882 A

しかし、シートの外径は、リングの内径よりも大きく、シートの厚みは、リングと球頭部との間より大きく設定されているため、シートの内表面が球頭部に押圧する一方、金属製のリングにおいても径方向外向きへ変形する。これにより、リングの外表面がハウジングの内表面を径方向外向きに押圧し、ハウジング外径が所定寸法より大きくなってしまうという問題があった。   However, since the outer diameter of the sheet is larger than the inner diameter of the ring and the thickness of the sheet is set larger than between the ring and the ball head, the inner surface of the sheet is pressed against the ball head, Even a made ring is deformed radially outward. As a result, the outer surface of the ring presses the inner surface of the housing radially outward, and the housing outer diameter becomes larger than a predetermined dimension.

また、組み付け後、アームに圧入されるボールジョイントでは、適切な揺動回転トルクを有するボールジョイントのハウジング部分がアームのアーム開口に圧入されるため、ハウジング外径は径方向内向きに圧縮され、ハウジングに当接するリングも径方向内向きに圧縮される。よって、リングに当接するシートも同様に径方向内向きに圧縮されるため、シートとボールスタッドの球頭部の間の揺動回転トルクが大幅に高くなるという問題があった。   In addition, in the ball joint that is press-fitted into the arm after assembly, since the housing portion of the ball joint having an appropriate swinging rotational torque is press-fitted into the arm opening of the arm, the outer diameter of the housing is compressed radially inward, The ring that contacts the housing is also compressed radially inward. Accordingly, since the seat that contacts the ring is similarly compressed radially inward, there has been a problem that the swinging rotational torque between the seat and the ball head of the ball stud is significantly increased.

そこで、本発明は、ハウジング外径が所定寸法のボールジョイントを提供するとともに、ボールジョイントのハウジング部分がアームのアーム開口に圧入された場合であっても、所望する揺動回転トルクを有するボールジョイントを提供することを目的とする。   Accordingly, the present invention provides a ball joint having a housing outer diameter of a predetermined size, and a ball joint having a desired rotational torque even when the housing portion of the ball joint is press-fitted into the arm opening of the arm. The purpose is to provide.

本発明のボールジョイントは、球状の球頭部と球頭部から突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揺動回動自在に包持するシートと、シートを内包し、ボールスタッドの柄部を突出させるハウジング開口を有するハウジングと、シートとハウジングの間でシートを径方向内向きに押圧するリングと、を備えハウジングがアームのアーム開口に圧入されるボールジョイントにおいて、ハウジングは、内周側にリングの外周面のリング鍔部が着座するリング用段部と、リング用段部の径方向外側にアームへ着座するハウジング鍔部を備え、リングは、ハウジング鍔部の径方向内側に設けられた第一外径部と、第一外径部より外径の小さい第二外径部とを有し、第一外径部のみハウジングの内周面に当接させ、リングの第一外径部より下側は、リングの外周面とハウジングの内周面の間に所定の空間を設けたことを第一の特徴とする。 A ball joint according to the present invention includes a ball stud having a spherical ball head and a handle protruding from the ball head, a seat for swinging and turning the ball head of the ball stud, and a seat including the seat And a ball joint in which the housing is press-fitted into the arm opening of the arm , the housing having a housing opening for projecting the handle portion of the ball stud, and a ring for pressing the seat radially inward between the seats. The housing includes a ring step on which the ring flange portion of the outer peripheral surface of the ring is seated on the inner peripheral side, and a housing flange portion seated on the arm on the radially outer side of the ring step portion. A first outer diameter portion provided on the radially inner side of the first outer diameter portion and a second outer diameter portion having an outer diameter smaller than the first outer diameter portion, and only the first outer diameter portion is brought into contact with the inner peripheral surface of the housing. ,ring Lower than the first outer diameter portion is a first feature in that a predetermined space between the outer peripheral surface and the inner peripheral surface of the housing of the ring.

本発明のボールジョイントは、リングは、先端に先端鋭角部を有し、シートの中央赤道部にはシート鍔部を有しており、リングの先端鋭角部は、シートのシート鍔部に突き刺し固定されることを第二の特徴とする。  In the ball joint of the present invention, the ring has a sharp tip at the tip, a seat collar at the central equator of the seat, and the sharp tip of the ring is stuck and fixed to the seat collar of the seat This is a second feature.

本発明のボールジョイントによれば、ハウジングは、内周側にリングの外周面のリング鍔部が着座するリング用段部と、リング用段部の径方向外側にアームへ着座するハウジング鍔部を備え、リングは、ハウジング鍔部の径方向内側に設けられた第一外径部と、第一外径部より外径の小さい第二外径部とを有し、第一外径部のみハウジングの内周面に当接させ、リング（５）の第一外径部（５ｅ）より下側は、リングの外周面とハウジングの内周面の間に所定の空間を設けたため、シートの厚みによってリングが径方向外向きへ変形した場合であっても、ハウジングの内周面とシートの外周面の間の空間によって、リングの外周面の拡径が吸収され、ハウジングの内周面が押圧されてハウジングの外径が大きくなることを抑制することができ、ハウジング外径を所定寸法に形成することができる。また、組み付け後、所望する揺動回転トルクを有するボールジョイントのハウジング部分がアームのアーム開口に圧入された場合であっても、ハウジングの内周面とシートの外周面の間の空間によって、ハウジングの内径の径方向内向きの収縮が吸収され、ボールジョイントのシートと球頭部間の揺動回転トルクの上昇を小さくすることができ、所望する揺動回転トルクに設定することができる。 According to the ball joint of the present invention, the housing includes a ring step portion on the inner peripheral side where the ring flange portion of the outer peripheral surface of the ring is seated, and a housing flange portion seated on the arm on the radially outer side of the ring step portion. The ring has a first outer diameter portion provided radially inside the housing collar and a second outer diameter portion having a smaller outer diameter than the first outer diameter portion, and only the first outer diameter portion is a housing. Since the predetermined space is provided between the outer peripheral surface of the ring and the inner peripheral surface of the housing, the thickness of the seat is lower than the first outer diameter portion (5e) of the ring (5). Even when the ring is deformed radially outward, the space between the inner peripheral surface of the housing and the outer peripheral surface of the seat absorbs the expanded diameter of the outer peripheral surface of the ring, and the inner peripheral surface of the housing is pressed. To prevent the outer diameter of the housing from increasing It is possible to form the housing outer diameter to a predetermined dimension. In addition, even after the assembly, even if the housing portion of the ball joint having the desired swinging and rotating torque is press-fitted into the arm opening of the arm, the housing is defined by the space between the inner peripheral surface of the housing and the outer peripheral surface of the seat. The contraction of the inner diameter of the ball joint inward in the radial direction is absorbed, and the increase in the swinging rotational torque between the ball joint seat and the ball head can be reduced, and the desired swinging rotational torque can be set.

図１は、ボールジョイント１がアーム１２に圧入された状態を表す断面平面図、図２は、図１の要部拡大図、図３は、ボールジョイントを組み付ける第一段階を表す断面平面図である。図４は、ボールジョイントを組み付ける第二段階を表す断面平面図である。図５は、本発明の実施例による要部拡大図である。 1 is a cross-sectional plan view showing a state where the ball joint 1 is press-fitted into the arm 12, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a cross-sectional plan view showing a first stage of assembling the ball joint. is there. FIG. 4 is a cross-sectional plan view showing a second stage of assembling the ball joint. FIG. 5 is an enlarged view of a main part according to an embodiment of the present invention .

まず、アーム１２のアーム開口１２ａに圧入されたボールジョイント１について図１及び図２に基づいて説明する。組み付けられるボールジョイント１は、中央に球状の球頭部２ａと球頭部２ａの軸線方向両端から突出する柄部２ｂ，２ｃとよりなるボールスタッド２を有する。柄部２ｂ，２ｃには、各々に後述するブーツ６，８を装着するブーツ嵌合溝２ｄ，２ｅが形成されている。   First, the ball joint 1 press-fitted into the arm opening 12a of the arm 12 will be described with reference to FIGS. The ball joint 1 to be assembled has a ball stud 2 including a spherical ball head 2a and handle portions 2b and 2c protruding from both axial ends of the ball head 2a at the center. The handle portions 2b and 2c are formed with boot fitting grooves 2d and 2e for mounting boots 6 and 8, which will be described later, respectively.

ボールスタッド２の球頭部２ａの周りには、軸線方向両端にボールスタッド２の柄部２ｂ，２ｃを突出させるシート開口３ａ，３ｂと、中央赤道部にシート鍔部３ｃとを有する合成樹脂製のシート３が配置されている。シート３の外周面で後述する金属製のハウジング４の内周面と当接するハウジング当接部３ｄは、ハウジング４のハウジング半球部４ｆによって径方向内向きに押圧される。また、シート３の外周面で後述する金属製のリング５の内周面と当接するリング当接部３ｅは、リング５のリング半球部５ｆによって径方向内向きに押圧される。この径方向内向きに押圧によって、シート３の内周面は、ボールスタッド２の球頭部２ａを径方向内向きに押圧し、シート３とボールスタッド２の球頭部２の間に所望する揺動回転トルクを発生させる。   Around the ball head 2a of the ball stud 2, a synthetic resin having seat openings 3a and 3b for projecting the handle portions 2b and 2c of the ball stud 2 at both ends in the axial direction and a seat collar 3c at the central equator portion. The sheet 3 is arranged. A housing contact portion 3 d that contacts an inner peripheral surface of a metal housing 4, which will be described later, on the outer peripheral surface of the sheet 3 is pressed radially inward by the housing hemispherical portion 4 f of the housing 4. Further, the ring contact portion 3 e that contacts the inner peripheral surface of the metal ring 5 described later on the outer peripheral surface of the sheet 3 is pressed radially inward by the ring hemispherical portion 5 f of the ring 5. By pressing inward in the radial direction, the inner peripheral surface of the seat 3 presses the ball head 2 a of the ball stud 2 inward in the radial direction, and a desired space between the seat 3 and the ball head 2 of the ball stud 2 is desired. Oscillating rotation torque is generated.

ハウジング４は、軸線方向両端にハウジング開口４ａ，４ｂを有し、一方のハウジング開口４ｂの外周面には、周状のブーツ装着溝４ｃが形成され、他方のハウジング開口４ａには、後述するリング５のリング鍔部５ｄをかしめ固定するかしめ部４ｅが形成されている。ハウジング４の内周面は、一方のハウジング開口４ｂ側から、シート３のハウジング当接部３ｄを当接させるハウジング半球部４ｆ、シート３のシート鍔部３ｃを周方向に着座させるシート用段部４ｇ、後述するリング５の外周面を対置させる円筒部４ｈ、リング５のリング鍔部５ｄを周方向に着座させるリング用段部４ｄが軸線方向に順に形成されている。   The housing 4 has housing openings 4a and 4b at both ends in the axial direction. A circumferential boot mounting groove 4c is formed on the outer peripheral surface of one housing opening 4b, and a ring described later is formed on the other housing opening 4a. A caulking portion 4e for caulking and fixing the 5 ring collar portion 5d is formed. The inner peripheral surface of the housing 4 includes, from one housing opening 4b side, a housing hemispherical portion 4f that contacts the housing contact portion 3d of the seat 3, and a seat step portion that seats the seat collar portion 3c of the seat 3 in the circumferential direction. 4 g, a cylindrical portion 4 h that faces an outer peripheral surface of the ring 5 described later, and a ring step portion 4 d that seats a ring flange portion 5 d of the ring 5 in the circumferential direction are formed in this order in the axial direction.

リング５は、他方のハウジング開口４ａ側のシート３とハウジング４の間に固定され、リング５の外周面に形成されたリング鍔部５ｄが、ハウジング４のリング用段部４ｄに着座し、ハウジング４のかしめ部４ｅによって、かしめ固定される。リング５は、軸線方向の一端にボールスタッド２の柄部２ｂが挿通されるリング開口５ａと、軸線方向の他端にボールスタッド２の球頭部２ａ及びシート３が挿通されるリング開口５ｂとを有する。一端のリング開口５ａ側の外周面には、周状のブーツ取付溝５ｃが形成され、他端のリング開口５ｂ側には、シート３のシート鍔部３ｃに突き刺し固定する先端鋭角部５ｇを有している。リング５の内周面はリング半球部５ｆを有し、リング半球部５ｆの内径はシート３の外径より小さいため、リング５の内周面によってシート３の外周面は、半球形状で径方向内向きに押圧される。また、図２に示すようにリング５の内周面がシート３の外周面を押圧する全ての範囲の径方向において、リング５の外周面とハウジング４の内周面の間に所定の空間Ｓが形成されている。尚、リング５のリング鍔部５ｄの下側の外径は、第一外径部５ｅと、第一外径部５ｅより外径の小さい第二外径部５ｆを有する。第一外径部５ｅと第二外径部５ｆに対置するハウジング４の円筒部４ｈの内径は一定であるため、所定の空間Ｓは、第一外径部に対応する第一空間Ｓ１と、第一空間Ｓ１より空間が広い第二外径部に対応する第二空間Ｓ２とが形成される。 The ring 5 is fixed between the seat 3 on the other housing opening 4a side and the housing 4, and a ring flange portion 5d formed on the outer peripheral surface of the ring 5 is seated on the ring step 4d of the housing 4, and the housing 5 The four caulking portions 4e are fixed by caulking. The ring 5 includes a ring opening 5a into which the handle 2b of the ball stud 2 is inserted at one end in the axial direction, and a ring opening 5b through which the ball head 2a and the seat 3 of the ball stud 2 are inserted into the other end in the axial direction. Have A circumferential boot mounting groove 5c is formed on the outer peripheral surface on the ring opening 5a side of one end, and a sharp edge portion 5g is provided on the ring opening 5b side of the other end to pierce and fix the seat collar portion 3c of the seat 3. is doing. The inner peripheral surface of the ring 5 has a ring hemispherical portion 5f, and the inner diameter of the ring hemispherical portion 5f is smaller than the outer diameter of the seat 3. Therefore, the outer peripheral surface of the seat 3 is hemispherical and radial due to the inner peripheral surface of the ring 5 It is pressed inward. Further, as shown in FIG. 2, a predetermined space S between the outer peripheral surface of the ring 5 and the inner peripheral surface of the housing 4 in the radial direction of the entire range in which the inner peripheral surface of the ring 5 presses the outer peripheral surface of the seat 3. Is formed. The lower outer diameter of the ring flange 5d of the ring 5 includes a first outer diameter portion 5e and a second outer diameter portion 5f having an outer diameter smaller than that of the first outer diameter portion 5e. Since the inner diameter of the cylindrical portion 4h of the housing 4 opposed to the first outer diameter portion 5e and the second outer diameter portion 5f is constant, the predetermined space S includes a first space S1 corresponding to the first outer diameter portion, A second space S2 corresponding to the second outer diameter portion, which is wider than the first space S1, is formed.

ボールスタッド２のブーツ嵌合溝２ｄとリング５のブーツ取付溝５ｃには、弾性部材からなるブーツ６が取り付けられ、リング５のブーツ取付溝５ｃに装着されるブーツ６の外周には、周状のサークリップ７が装着されている。また、ボールスタッド２のブーツ嵌合溝２ｅとハウジング４のブーツ装着溝４ｃには、弾性部材からなるブーツ８が取り付けられ、ハウジング４のブーツ装着溝４ｃに装着されるブーツ８の外周には、周状のサークリップ９が装着されている。   A boot 6 made of an elastic member is attached to the boot fitting groove 2d of the ball stud 2 and the boot attachment groove 5c of the ring 5, and the outer periphery of the boot 6 attached to the boot attachment groove 5c of the ring 5 is circumferential. The circlip 7 is attached. Further, a boot 8 made of an elastic member is attached to the boot fitting groove 2e of the ball stud 2 and the boot mounting groove 4c of the housing 4, and the outer periphery of the boot 8 attached to the boot mounting groove 4c of the housing 4 is A circumferential circlip 9 is attached.

次に上記ボールジョイント１の製造方法を図３及び図４に基づいて説明する。まず、図３に示す如く、シート３を他方のハウジング開口４ａ側からハウジング４内に圧入し、シート３のハウジング当接部３ｄをハウジング４のハウジング半球部４ｆに当接させる。この時、シート３のシート鍔部３ｃは、ハウジング４のシート用段部４ｇに当接する。続いてシート開口３ａ側にボールスタッド２の柄部２ｃを挿入し、ボールスタッド２の球頭部２ａをシート３の内表面に圧入する。その後、図４に示す如く、リング５のリング半球部５ｆがシート３のリング当接部３ｅに当接するようにリング開口５ｂ側をハウジング４とシート３の間に圧入する。リング５のリング開口５ｂ側は、先端鋭角部５ｇを有しており、シート３のシート鍔部３ｃに突き刺し固定される。リング５のリング半球部５ｆはボールスタッド２の球頭部２ａの曲率と略同一曲率を有しており、シート３は、リング５のリング半球部５ｆの曲率に従い変形してボールスタッド２の球頭部２ａに圧接される。次にハウジング４の他方のハウジング開口４ａ側のかしめ部４ｅをリング５のリング鍔部５ｄを包むようにかしめて、リング５をハウジング４に対し固定する。その後、ブーツ６の一方のブーツ開口６ａをボールスタッド２のブーツ嵌合溝２ｄに、他方のブーツ開口６ｂをリング５のブーツ取付溝５ｃに取り付け、リング５のブーツ取付溝５ｃに取り付けられたブーツ６の外周にサークリップ７を嵌装する。同様に、ブーツ８の一方のブーツ開口８ａをボールスタッド２のブーツ嵌合溝２ｅに、他方のブーツ開口８ｂをハウジング４のブーツ装着溝４ｃに取り付け、ハウジング４のブーツ装着溝４ｃに取り付けられたブーツ８の外周にサークリップ９を嵌装して、ボールジョイントの組み付けが完了する。 Next, the manufacturing method of the said ball joint 1 is demonstrated based on FIG.3 and FIG.4. First, as shown in FIG. 3, the seat 3 is press-fitted into the housing 4 from the other housing opening 4 a side, and the housing contact portion 3 d of the seat 3 is brought into contact with the housing hemisphere portion 4 f of the housing 4. At this time, the sheet collar portion 3 c of the seat 3 abuts on the sheet step 4 g of the housing 4. Subsequently, the handle 2 c of the ball stud 2 is inserted into the seat opening 3 a side, and the ball head 2 a of the ball stud 2 is press-fitted into the inner surface of the seat 3. Thereafter, as shown in FIG. 4, the ring opening 5 b side is press-fitted between the housing 4 and the seat 3 so that the ring hemispherical portion 5 f of the ring 5 abuts on the ring abutting portion 3 e of the seat 3. The ring opening 5b side of the ring 5 has a sharp tip angled portion 5g , and is pierced and fixed to the sheet collar portion 3c of the sheet 3. The ring hemisphere portion 5f of the ring 5 has substantially the same curvature as the curvature of the ball head 2a of the ball stud 2, and the seat 3 is deformed in accordance with the curvature of the ring hemisphere portion 5f of the ring 5, and the ball stud 2 It is pressed against the head 2a. Next, the ring 4 is fixed to the housing 4 by caulking the caulking portion 4 e on the other housing opening 4 a side of the housing 4 so as to wrap the ring flange portion 5 d of the ring 5. Thereafter, one boot opening 6 a of the boot 6 is attached to the boot fitting groove 2 d of the ball stud 2, and the other boot opening 6 b is attached to the boot attachment groove 5 c of the ring 5, and the boot attached to the boot attachment groove 5 c of the ring 5. A circlip 7 is fitted on the outer periphery of 6. Similarly, one boot opening 8 a of the boot 8 is attached to the boot fitting groove 2 e of the ball stud 2, and the other boot opening 8 b is attached to the boot attachment groove 4 c of the housing 4, and attached to the boot attachment groove 4 c of the housing 4. The circlip 9 is fitted on the outer periphery of the boot 8 to complete the assembly of the ball joint.

組み付けが完了したボールジョイント１は、自動車の懸架装置及び操舵装置に使用されるアーム１２のアーム開口１２ａに圧入される。   The ball joint 1 that has been assembled is press-fitted into an arm opening 12a of an arm 12 that is used in a suspension device and a steering device of an automobile.

上記の如きボールジョイント１では、リング５の内周面がシート３の外周面を押圧する範囲の径方向で、リング５の外周面とハウジング４の内周面の間に所定の空間Ｓを設けたため、シート３の厚みによってリング５が径方向外向きへ変形した場合であっても、ハウジング４の内周面とシート３の外周面の間の空間Ｓによって、リング５の外周面の拡径が吸収され、ハウジング４の内周面が押圧されてハウジング４の外径が大きくなることを抑制することができる。   In the ball joint 1 as described above, a predetermined space S is provided between the outer peripheral surface of the ring 5 and the inner peripheral surface of the housing 4 in the radial direction in a range in which the inner peripheral surface of the ring 5 presses the outer peripheral surface of the seat 3. Therefore, even if the ring 5 is deformed radially outward due to the thickness of the seat 3, the diameter of the outer peripheral surface of the ring 5 is increased by the space S between the inner peripheral surface of the housing 4 and the outer peripheral surface of the seat 3. It is possible to suppress the outer diameter of the housing 4 from being increased due to the absorption of the water and the inner peripheral surface of the housing 4 being pressed.

また、組み付けられた適切な揺動回転トルクを有するボールジョイント１のハウジング４がアーム１２のアーム開口４ａに圧入された場合であっても、ハウジング４の内周面とシート３の外周面の間の空間Ｓによって、ハウジング４の内径の径方向内向きの収縮が吸収され、ボールジョイント１のシート３と球頭部２ａの間の揺動回転トルクの上昇を小さくすることができる。すなわち、リングの外周面とハウジングの内周面の間に空間のない従来のボールジョイント１においては、アームのアーム開口にボールジョイントを圧入した場合、ボールジョイントのシート３と球頭部２ａの間の揺動回転トルクが２．６Ｎｍ大きくなったが、本発明のボールジョイント１をアーム１２のアーム開口１２ａに圧入した場合の揺動回転トルクの上昇値は、１．７Ｎｍと約半分に軽減される。ここで、揺動回転トルクの上昇値が０とならないのは、シート３のハウジング当接部３ｄとハウジング４のハウジング半球部４ｆが当接しているため、ボールジョイント１をアーム１２のアーム開口１２ａに圧入した場合のハウジング４のハウジング半球部４ｆの縮径がシート３のハウジング当接部３ｄの縮径につながり、シート３の内周面がボールスタッド２の球頭部２ａを更に押圧するためであるが、揺動回転トルクの上昇を小さくすることにより、揺動回転トルクのバラツキが小さくなり、管理が容易となる。   Further, even when the assembled housing 4 of the ball joint 1 having an appropriate swinging rotational torque is press-fitted into the arm opening 4 a of the arm 12, it is between the inner peripheral surface of the housing 4 and the outer peripheral surface of the seat 3. Due to the space S, the radially inward contraction of the inner diameter of the housing 4 is absorbed, and an increase in the swinging rotational torque between the seat 3 of the ball joint 1 and the ball head 2a can be reduced. That is, in the conventional ball joint 1 in which there is no space between the outer peripheral surface of the ring and the inner peripheral surface of the housing, when the ball joint is press-fitted into the arm opening of the arm, it is between the ball joint seat 3 and the ball head 2a. However, when the ball joint 1 of the present invention is press-fitted into the arm opening 12 a of the arm 12, the increase value of the swinging rotational torque is reduced to about 1.5 Nm. The Here, the increase value of the oscillating rotational torque does not become zero because the housing contact portion 3d of the seat 3 and the housing hemisphere portion 4f of the housing 4 are in contact with each other. The diameter of the housing hemispherical portion 4f of the housing 4 when press-fitted into the housing leads to the diameter of the housing abutting portion 3d of the seat 3, and the inner peripheral surface of the seat 3 further presses the ball head 2a of the ball stud 2. However, by reducing the increase in the oscillating rotational torque, the variation in the oscillating rotational torque is reduced and management is facilitated.

尚、リング５の外周面とハウジング４の内周面の間の空間Ｓは、０．１〜１．０ｍｍの範囲内にあることが好ましい。   The space S between the outer peripheral surface of the ring 5 and the inner peripheral surface of the housing 4 is preferably in the range of 0.1 to 1.0 mm.

本発明の実施例では、図５のようにリング５のリング鍔部５ｄの下側の外径を第一外径部５ｅと、第一外径部５ｅより外径の小さい第二外径部５ｆとを設け、第一外径部５ｅのみハウジング４の内周面に当接させる。本実施例では、球頭部２ａの両端に柄部２ｂ，２ｃを設け、シート３及びハウジング４に軸線方向両端の開口３ａ，３ｂ，４ａ，４ｂを有するボールジョイントについて説明したが、球頭部２ａの一端のみに柄部を有し、シート３及びハウジング４の軸線方向に開口を一端のみに有するボールジョイントについても適用可能である。 In the embodiment of the present invention , as shown in FIG. 5 , the lower outer diameter of the ring flange portion 5d of the ring 5 is the first outer diameter portion 5e and the second outer diameter portion whose outer diameter is smaller than the first outer diameter portion 5e. 5f is provided, and only the first outer diameter portion 5e is brought into contact with the inner peripheral surface of the housing 4 . In the present embodiment, the ball joint having the handle portions 2b and 2c at both ends of the ball head 2a and the openings 3a, 3b, 4a and 4b at the both ends in the axial direction in the seat 3 and the housing 4 has been described. The present invention can also be applied to a ball joint having a handle at only one end of 2a and having an opening at only one end in the axial direction of the seat 3 and the housing 4.

ボールジョイントがアームに圧入された状態を表す断面平面図である。It is a section top view showing the state where the ball joint was press-fitted into the arm. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明のボールジョイントを組み付ける第一段階を表す断面平面図である。It is a section top view showing the 1st step which assembles the ball joint of the present invention. 本発明のボールジョイントを組み付ける第二段階を表す断面平面図である。It is a section top view showing the 2nd step which assembles the ball joint of the present invention. 本発明の実施例による要部拡大図である。It is a principal part enlarged view by the Example of this invention.

２ ボールスタッド
２ａ 球頭部
２ｂ，２ｃ 柄部
３ シート
４ ハウジング
４ａ，４ｂ ハウジング開口
５ リング
Ｓ 所定の空間 2 Ball stud 2a Ball head 2b, 2c Handle 3 Seat 4 Housing 4a, 4b Housing opening 5 Ring S Predetermined space

Claims (2)

球状の球頭部（２ａ）と該球頭部（２ａ）から突出する柄部（２ｂ，２ｃ）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（２ａ）を揺動回動自在に包持するシート（３）と、
該シート（３）を内包し、前記ボールスタッド（２）の柄部（２ｂ，２ｃ）を突出させるハウジング開口（４ａ，４ｂ）を有するハウジング（４）と、
該シート（３）と該ハウジング（４）の間で該シート（３）を径方向内向きに押圧するリング（５）と、を備え、
前記ハウジング（４）がアーム（１２）のアーム開口（１２ａ）に圧入されるボールジョイントにおいて、
前記ハウジング（４）は、内周側に前記リング（５）の外周面のリング鍔部（５ｄ）が着座するリング用段部（４ｄ）と、該リング用段部（４ｄ）の径方向外側にアーム（１２）へ着座するハウジング鍔部を備え、
前記リング（５）は、前記ハウジング鍔部の径方向内側に設けられた第一外径部（５ｅ）と、第一外径部（５ｅ）より外径の小さい第二外径部（５ｆ）とを有し、第一外径部（５ｅ）のみ前記ハウジング（４）の内周面に当接させ、前記リング（５）の第一外径部（５ｅ）より下側は、前記リング（５）の外周面と前記ハウジング（４）の内周面の間に所定の空間（Ｓ）を設けた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 (2a) and a handle (2b, 2c) protruding from the ball head (2a);
A seat (3) holding the ball head (2a) of the ball stud (2) in a swingable manner;
A housing (4) having a housing opening (4a, 4b) containing the seat (3) and projecting the handle (2b, 2c) of the ball stud (2);
A ring (5) for pressing the sheet (3) radially inward between the sheet (3) and the housing (4) ;
In the ball joint in which the housing (4) is press-fitted into the arm opening (12a) of the arm (12) ,
The housing (4) includes a ring step (4d) on the inner peripheral side on which a ring flange (5d) on the outer peripheral surface of the ring (5) is seated, and a radially outer side of the ring step (4d). A housing collar that sits on the arm (12),
The ring (5) includes a first outer diameter portion (5e) provided on the radially inner side of the housing flange and a second outer diameter portion (5f) having an outer diameter smaller than that of the first outer diameter portion (5e). Only the first outer diameter portion (5e) is brought into contact with the inner peripheral surface of the housing (4), and the lower side from the first outer diameter portion (5e) of the ring (5) is the ring ( A ball joint characterized in that a predetermined space (S) is provided between the outer peripheral surface of 5) and the inner peripheral surface of the housing (4). 前記リング（５）は、先端に先端鋭角部（５ｇ）を有し、The ring (5) has a sharp tip (5g) at the tip,
前記シート（３）の中央赤道部にはシート鍔部（３ｃ）を有しており、The central equator of the sheet (3) has a sheet collar (3c),
前記リング（５）の先端鋭角部（５ｇ）は、前記シート（３）のシート鍔部（３ｃ）に突き刺し固定されることを特徴とする請求項１に記載のボールジョイント。2. The ball joint according to claim 1, wherein the tip acute angle portion (5 g) of the ring (5) is pierced and fixed to the seat flange (3 c) of the seat (3).
JP2007122105A 2006-05-30 2007-05-07 Ball joint Active JP4964663B2 (en)

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