JPH06341552A - Fixing structure of boot - Google Patents
Fixing structure of bootInfo
- Publication number
- JPH06341552A JPH06341552A JP15282593A JP15282593A JPH06341552A JP H06341552 A JPH06341552 A JP H06341552A JP 15282593 A JP15282593 A JP 15282593A JP 15282593 A JP15282593 A JP 15282593A JP H06341552 A JPH06341552 A JP H06341552A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- annular
- boot
- peripheral surface
- groove
- 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
Links
Landscapes
- Diaphragms And Bellows (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の等速ジョイン
ト用、その他各種機器用ブーツを被装着部材に装着する
ブーツの固着構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot fixing structure for mounting boots for constant velocity joints of automobiles and other various equipment on a member to be mounted.
【０００２】[0002]
【従来の技術】自動車の等速ジョイント用ブーツとし
て、熱可塑性エラストマーで構成され、蛇腹部の両端
に、等速ジョイントの外輪および軸にそれぞれ密に封止
する固着部を設けたものを、等速ジョイントの外輪に装
着するブーツの固着構造は、例えば、特開平２−２２１
７６６号公報に記載されているものが知られている。2. Description of the Related Art As a boot for a constant velocity joint of an automobile, a boot made of a thermoplastic elastomer and provided with fixing portions for tightly sealing the outer ring and the shaft of the constant velocity joint at both ends of the bellows portion, etc. The fixing structure of the boot attached to the outer ring of the quick joint is disclosed in, for example, JP-A-2-221.
The one described in Japanese Patent No. 766 is known.
【０００３】この種の自動車の等速ジョイント用ブーツ
の多くは、耐熱性、耐寒性、耐久性に優れる熱可塑性エ
ラストマーで構成されるが、熱可塑性エラストマーは、
剛性が高いために金属との密着性に劣る。このため、熱
可塑性エラストマーで構成されたブーツは、その固着部
が金属からなるジョイントの外輪または軸の表面との間
で滑りが生じて脱落し易いという欠点がある。Most of the boots for constant velocity joints of automobiles of this type are composed of a thermoplastic elastomer which is excellent in heat resistance, cold resistance and durability.
Poor adhesion to metal due to high rigidity. For this reason, the boot made of a thermoplastic elastomer has a drawback that slippage occurs easily between the boot and the outer ring of the joint or the surface of the shaft of the joint where the fixing portion is made of metal, and the boot easily falls off.
【０００４】[0004]
【発明が解決しようとする課題】そこで、上記特開平２
−２２１７６６号公報に記載されているものにあって
は、固着部の内周面に環状突隆部を形成して、固着部を
平ベルトで締め付ける構成とすることにより、シール性
および固着性の向上を図っている。しかしながら、この
構成のものでは、図４に示すように、環状突隆部ａが軸
線方向と直交する中心線ｂに対する角度αが４０度以下
の直線ｃに接する形状のもので、環状突隆部ａの軸方向
への広がりが小さいから、固着部の内径を外輪の外径よ
り小さくしても、装着状態で被装着部材である等速ジョ
イントの外輪に形成されているリング凹溝ｄに環状突隆
部ａが落ち込んでしまい、端縁角度ｅ，ｅに環状突隆部
ａの斜面ｆ，ｆの当接が不十分となり、十分なシール効
果を期待することができないという欠点がある。SUMMARY OF THE INVENTION Therefore, the above-mentioned Japanese Patent Laid-Open No.
In the one disclosed in Japanese Patent Laid-Open No. 221766/1990, an annular protrusion is formed on the inner peripheral surface of the fixing portion, and the fixing portion is fastened with a flat belt. We are trying to improve. However, in this structure, as shown in FIG. 4, the annular protrusion ridge a has a shape in which the annular protrusion ridge a is in contact with a straight line c whose angle α is 40 degrees or less with respect to a center line b orthogonal to the axial direction. Since a spreads a in the axial direction is small, even if the inner diameter of the fixed portion is smaller than the outer diameter of the outer ring, the ring groove d formed in the outer ring of the constant velocity joint, which is the mounted member in the mounted state, has an annular shape. The protruding ridge a is depressed, and the slanted surfaces f, f of the annular protruding ridge a are not sufficiently brought into contact with the edge angles e, e, so that a sufficient sealing effect cannot be expected.
【０００５】本発明は、このような従来のものの実状に
鑑み、熱可塑性エラストマーで構成されたブーツであっ
ても、その固着部の内周面に形成された突隆部を軸線方
向と直交する中心線に対して５０〜６５度（好ましくは
５０〜６０度）の角度をなす直線に接する形状とし、被
装着部材の外周面に上記環状突隆部より狭幅のリング凹
溝を形成したことにより、環状突隆部の軸方向両側部を
被装着部材のリング凹溝に係止させた状態で固着するこ
とができ、ブーツの固着部と被装着部材との間に滑りが
生ぜず、しかもきわめて高いシール強度を有するブーツ
の固着構造を提供することを目的とするものである。In view of the actual situation of such a conventional one, the present invention is such that, even in a boot made of a thermoplastic elastomer, the protrusions formed on the inner peripheral surface of the fixing portion are orthogonal to the axial direction. A ring concave groove narrower than the annular protrusion is formed on the outer peripheral surface of the mounted member so as to be in contact with a straight line forming an angle of 50 to 65 degrees (preferably 50 to 60 degrees) with respect to the center line. By this, it is possible to fix both sides of the annular protruding portion in the axial direction while being locked in the ring concave groove of the mounted member, and no slippage occurs between the fixed portion of the boot and the mounted member, and An object of the present invention is to provide a boot fixing structure having extremely high sealing strength.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するため次のように構成した。すなわち、本発明に係
るブーツの固着構造は、蛇腹部と蛇腹部の両端に被装着
部材に密に封止する固着部を有するブーツを被装着部材
に装着する固着構造において、少なくとも一方の固着部
の外周面に締具を装着する環状凹陥部を形成し、この環
状凹陥部に、その軸方向略中央部に環状凹溝部を形成す
るとともに、上記環状凹溝部に対応する環状凹陥部の内
周面に、軸線方向と直交する中心線に対して５０〜６５
度の角度をなす直線に接する形状で内方に突隆する環状
突隆部を形成し、被装着部材の外周面には、環状突隆部
より狭幅のリング凹溝を形成して、ブーツの固着部を環
状突隆部が被装着部材のリング凹溝に嵌入するように締
め付けて固着してなるものである。The present invention has the following constitution to achieve the above object. That is, the boot fixing structure according to the present invention is a fixing structure for mounting a boot to a mounted member, the boot having a bellows part and a fixing part tightly sealing the mounted member at both ends of the bellows part. An annular concave portion for mounting a fastener is formed on the outer peripheral surface of the annular concave portion, and an annular concave groove portion is formed in the annular concave portion at a substantially central portion in the axial direction, and an inner circumference of the annular concave portion corresponding to the annular concave groove portion is formed. 50 to 65 with respect to the center line orthogonal to the axial direction on the surface.
An annular protrusion that protrudes inward is formed in a shape that is in contact with a straight line that forms an angle of degrees, and a ring groove that is narrower than the annular protrusion is formed on the outer peripheral surface of the mounted member, and the boot is formed. The fixing portion is fixed by tightening so that the annular protruding portion fits into the ring concave groove of the mounted member.
【０００７】[0007]
【作用】本発明に係るブーツの固着構造においては、環
状凹陥部の内周面に軸線方向と直交する中心線に対して
５０〜６５度の角度をなす直線に接する形状で内方に突
隆する環状突隆部が形成されており、被装着部材の外周
面には環状突隆部より狭幅のリング凹溝が形成されてい
るので、環状凹陥部を締具で締め付けると、環状突隆部
が被装着部のリング凹溝内に嵌入し、かつその裾部がリ
ング凹溝の両端縁に係止した状態で固着部が被装着部材
に固着される。このため、固着部は被装着部材に強固に
固着されるとともに高いシール性が得られる。In the boot fixing structure according to the present invention, the inner peripheral surface of the annular recess has a shape that is in contact with a straight line that forms an angle of 50 to 65 degrees with respect to the center line orthogonal to the axial direction. Since the ring-shaped groove is formed on the outer peripheral surface of the mounted member and has a narrower width than that of the ring-shaped groove, the ring-shaped groove can be tightened by tightening the ring-shaped groove. The fixing portion is fixed to the mounted member in a state in which the portion is fitted into the ring concave groove of the mounted portion and the skirt portion is locked to both end edges of the ring concave groove. For this reason, the fixing portion is firmly fixed to the mounted member and high sealing property is obtained.
【０００８】[0008]
【実施例】図面には自動車の等速ジョイント用ブーツが
例示されている。図１において、１はブーツであり、こ
のブーツ１は、ポリエステル系、ポリウレタン系、ポリ
アミド系、ポリオレフィン系などの熱可塑性エラストマ
ーの単体またはこれらのブレンド体を、ブロー成形、射
出成形あるいは射出ブロー成形により単層あるいは多層
状に成形したものである。ブーツ１は、蛇腹部２の一端
に筒状の大径の固着部３を、かつ他端に筒状の小径の固
着部４を一体に形成してなるものである。ブーツ１を構
成する熱可塑性エラストマーは、引張弾性率（ＪＩＳ
Ｋ６３０１）が１００〜２０００Ｋｇ／ｃｍ2の比較的
強度が大である弾性材料である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show boots for constant velocity joints of automobiles. In FIG. 1, reference numeral 1 denotes a boot, which is formed by blow molding, injection molding, or injection blow molding of a single thermoplastic elastomer such as polyester, polyurethane, polyamide, or polyolefin, or a blend thereof. It is formed into a single layer or a multilayer. The boot 1 is formed by integrally forming a large cylindrical fixing portion 3 at one end of a bellows portion 2 and a small cylindrical fixing portion 4 at the other end. The thermoplastic elastomer forming the boot 1 has a tensile elastic modulus (JIS
K6301) is an elastic material having a relatively high strength of 100 to 2000 Kg / cm 2 .
【０００９】固着部３および固着部４の外周面には、図
２に示すように、平ベルト状の締具５を装着するための
環状凹陥部６，７がそれぞれ形成されている。図３に詳
細を示すように、上記固着部３の環状凹陥部６には、そ
の軸方向略中央部に環状凹溝部８が形成されるととも
に、環状凹溝部８に対応する環状凹陥部６の内周面には
内方に突隆する環状突隆部９が形成されている。上記環
状凹溝部８は中央部の深い凹溝８ａとその両側にわたる
浅い凹溝８ｂの２段形状に形成されている。上記環状突
隆部９は、図３に示すように、軸線方向と直交する中心
線Ａに対する角度βが５０〜６５度をなす直線Ｂに接す
る形状に裾部９ｂ，９ｂが形成されている。一方、図２
および図３に示すように、被装着部材である等速ジョイ
ントの外輪１０には、その外周面にリング凹溝１１が形
成されている。環状凹陥部６の内周面の内径Ｄｂは、等
速ジョイントの外輪１０の外径Ｄｊと比べて同じかやや
大きく（Ｄｂ≦Ｄｊ）の関係を有する。リング凹溝１１
は、両端縁部１１ｂ，１１ｂを軸線に対して５０〜７０
度の角度で拡開状に形成したものであり、リング凹溝１
１はその両端縁部１１ｂ，１１ｂの端縁角部１１ｃ，１
１ｃがブーツ１の前記環状突隆部９の裾部９ｂ，９ｂの
略中央部分と対応するものである。なお、図１に示した
ものは、小径の固着部４も、大径の固着部３と同様に構
成されている。As shown in FIG. 2, annular recesses 6 and 7 for mounting the flat belt-shaped fasteners 5 are formed on the outer peripheral surfaces of the fixing portions 3 and 4, respectively. As shown in detail in FIG. 3, the annular recessed portion 6 of the fixing portion 3 is formed with an annular recessed groove portion 8 at a substantially central portion in the axial direction thereof, and the annular recessed portion 6 corresponding to the annular recessed groove portion 8 is formed. An annular protruding portion 9 is formed on the inner peripheral surface so as to protrude inward. The annular recessed groove portion 8 is formed in a two-step shape including a deep recessed groove 8a in the central portion and a shallow recessed groove 8b extending on both sides thereof. As shown in FIG. 3, the annular protrusion 9 has skirts 9b, 9b formed in a shape in contact with a straight line B having an angle β of 50 to 65 degrees with respect to a center line A orthogonal to the axial direction. On the other hand, FIG.
As shown in FIG. 3 and FIG. 3, a ring groove 11 is formed on the outer peripheral surface of the outer ring 10 of the constant velocity joint which is the member to be mounted. The inner diameter Db of the inner peripheral surface of the annular recess 6 has the same or slightly larger value (Db ≦ Dj) than the outer diameter Dj of the outer ring 10 of the constant velocity joint. Ring groove 11
Is 50 to 70 at both end edges 11b and 11b with respect to the axis.
The ring groove 1 is formed in an expanded shape at an angle of 1 degree.
1 is the end edge corners 11c and 1c of the two end edges 11b and 11b.
Reference numeral 1c corresponds to a substantially central portion of the hem portions 9b, 9b of the annular protruding portion 9 of the boot 1. In addition, in the structure shown in FIG. 1, the small-diameter fixing portion 4 has the same structure as the large-diameter fixing portion 3.
【００１０】本考案に係るブーツ１は、図２に示すよう
に、等速ジョイントに装着される。すなわち、ブーツ１
の固着部３は外輪１０に、固着部４は軸１２にそれぞれ
固着される。そして、ブーツ１の固着部３は等速ジョイ
ントの外輪１０に差し込んで被せるが、固着部３の内周
面に環状突隆部９があっても、それに対応して外周側に
２段形状の環状凹溝部８が形成されているので、外輪１
０に固着部３を差し込む過程では、環状凹溝部８が軸方
向に開くように変形して環状突隆部９が内周面と略同一
面まで没入するように内周面が弯曲変形して容易に挿入
することができ、環状突隆部９がリング凹溝１１に嵌入
する状態にすることができる。次いで、この状態で締具
５を締め付けると、内周面では環状突隆部９がリング凹
溝１１内に嵌入した状態で環状突隆部９の裾部の略中央
部分が外輪１０のリング凹溝１１の両端縁部１１ｂ，１
１ｂの端縁角部１１ｃ，１１ｃに係合するように圧着さ
れるが、環状突隆部９は軸線方向と直交する中心線Ａに
対する角度βが５０〜６５度をなす直線Ｂに接する形状
であるから、固着部３の内周面は、環状突隆部９が外輪
１０のリング凹溝１１で軸方向３箇所が圧着されること
になり、固着部３と外輪１０との間に滑りが生ぜず、し
かも固着部３と外輪１０との間のシール強度がきわめて
高くなる。なお、リング凹溝１１は両端部が拡開状に形
成されているので、裾部９ｂ，９ｂが広がった環状突隆
部９の形状とよく適合して環状突隆部９は全体に均等に
圧縮変形し、リング凹溝１１との係合状態が良好で、固
着部３と外輪１０との間のシール強度がいっそう高くな
る。The boot 1 according to the present invention is attached to a constant velocity joint as shown in FIG. That is, boots 1
The fixing portion 3 is fixed to the outer ring 10, and the fixing portion 4 is fixed to the shaft 12. Then, the fixing portion 3 of the boot 1 is inserted into the outer ring 10 of the constant velocity joint to cover it, but even if the inner peripheral surface of the fixing portion 3 has an annular protrusion 9, a corresponding two-step shape is formed on the outer peripheral side. Since the annular groove 8 is formed, the outer ring 1
In the process of inserting the fixing portion 3 into 0, the annular concave groove portion 8 is deformed so as to open in the axial direction, and the inner peripheral surface is curved and deformed so that the annular protruding ridge 9 is recessed to approximately the same surface as the inner peripheral surface. It can be easily inserted, and the annular protrusion 9 can be fitted in the ring groove 11. Next, when the fastener 5 is tightened in this state, the annular projection ridge 9 is fitted into the ring concave groove 11 on the inner peripheral surface, and the substantially central portion of the skirt of the annular projection ridge 9 is the ring concave portion of the outer ring 10. Both edges 11b, 1 of the groove 11
1b is crimped so as to engage with the edge corners 11c, 11c, but the annular protruding ridge 9 has a shape in contact with a straight line B having an angle β of 50 to 65 degrees with respect to a center line A orthogonal to the axial direction. Therefore, on the inner peripheral surface of the fixing portion 3, the annular protruding portion 9 is crimped at the axial concave portions 11 of the outer ring 10 at three positions in the axial direction, and slippage occurs between the fixing portion 3 and the outer ring 10. The sealing strength between the fixed portion 3 and the outer ring 10 is extremely high. Since both ends of the ring recessed groove 11 are formed in an expanded shape, the ring recessed groove 11 fits well with the shape of the annular protruding ridge 9 in which the skirts 9b and 9b are widened, and the annular protruding ridge 9 is evenly distributed as a whole. It is compressed and deformed, the state of engagement with the ring groove 11 is good, and the sealing strength between the fixing portion 3 and the outer ring 10 is even higher.
【００１１】上記実施例では、環状凹溝部８が２段形状
をなしているが、その形状は例えば逆台形や先端が丸形
の半長円形などの形状であってもよいが、いずれの場合
でも角度βが５０〜６５度であることが重要である。ま
た、環状凹溝部８に環状凹溝部８の形状に応じた金属や
硬質樹脂からなる環状部材を埋め込むことにより、締具
５による締め状態を良好にして、さらに強力なシール強
度を得ることができる。In the above embodiment, the annular groove 8 has a two-step shape, but the shape may be, for example, an inverted trapezoid or a semi-oval shape with a round tip, but in any case. However, it is important that the angle β is 50 to 65 degrees. Further, by embedding an annular member made of a metal or a hard resin according to the shape of the annular groove 8 in the annular groove 8, the tightened state by the fastener 5 can be improved and stronger sealing strength can be obtained. .
【００１２】[0012]
【発明の効果】本発明に係るブーツ固着構造によれば、
熱可塑性エラストマーで構成されたブーツであっても、
その固着部の内周面に形成された環状突隆部が軸線方向
と直交する中心線に対して５０〜６０度の角度をなす直
線に接する形状であり、被装着部材の外周に上記環状突
隆部より狭幅のリング凹溝が形成されているので、環状
突隆部の軸方向両側部を被装着部材のリング凹溝に係止
させた状態で固着することができ、ブーツの固着部と被
装着部材との間に滑りが生ぜず、しかもきわめて高いシ
ール強度を得ることができる。According to the boot fixing structure according to the present invention,
Even boots made of thermoplastic elastomer,
The annular projection ridge formed on the inner peripheral surface of the fixed portion is in contact with a straight line forming an angle of 50 to 60 degrees with respect to a center line orthogonal to the axial direction, and the annular projection is formed on the outer periphery of the mounted member. Since the ring groove having a width narrower than that of the ridge is formed, it is possible to fix the annular protruding ridge in a state in which both sides in the axial direction are locked in the ring groove of the member to be mounted. There is no slip between the mounting member and the mounted member, and extremely high sealing strength can be obtained.
【図１】本発明の一実施例に係るブーツを一部破断して
示す全体正面図である。FIG. 1 is an overall front view showing a boot according to an embodiment of the present invention with a part thereof cut away.
【図２】本発明のブーツの固着構造を示す概略正面図で
ある。FIG. 2 is a schematic front view showing a boot fixing structure of the present invention.
【図３】図２に示したブーツの固着構造の詳細を説明す
る縦断正面図である。FIG. 3 is a vertical cross-sectional front view for explaining details of the boot fixing structure shown in FIG.
【図４】従来のブーツの固着構造を示す縦断正面図であ
る。FIG. 4 is a vertical sectional front view showing a conventional boot fixing structure.
１ ブーツ ２ 蛇腹部 ３，４ 固着部 ５ 締具 ６，７ 環状凹陥部 ８ 環状凹溝 ９ 環状突隆部 １１ リング凹溝 DESCRIPTION OF SYMBOLS 1 boot 2 bellows part 3, 4 fixing part 5 fastening tool 6, 7 annular recessed part 8 annular recessed groove 9 annular protruding part 11 ring recessed groove
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【手続補正書】[Procedure amendment]
【提出日】平成５年１２月１７日[Submission date] December 17, 1993
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の詳細な説明[Name of item to be amended] Detailed explanation of the invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、自動車の等速ジョイン
ト用、その他各種機器用ブーツを被装着部材に装着する
ブーツの固着構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot fixing structure for mounting boots for constant velocity joints of automobiles and other various equipment on a member to be mounted.
【０００２】[0002]
【従来の技術】自動車の等速ジョイント用ブーツとし
て、熱可塑性エラストマーで構成され、蛇腹部の両端
に、等速ジョイントの外輪および軸にそれぞれ密に封止
する固着部を設けたものを、等速ジョイントの外輪に装
着するブーツの固着構造は、例えば、特開平２−２２１
７６６号公報に記載されているものが知られている。2. Description of the Related Art As a boot for a constant velocity joint of an automobile, a boot made of a thermoplastic elastomer and provided with fixing portions for tightly sealing the outer ring and the shaft of the constant velocity joint at both ends of the bellows portion, etc. The fixing structure of the boot attached to the outer ring of the quick joint is disclosed in, for example, JP-A-2-221.
The one described in Japanese Patent No. 766 is known.
【０００３】この種の自動車の等速ジョイント用ブーツ
の多くは、耐熱性、耐寒性、耐久性に優れる熱可塑性エ
ラストマーで構成されるが、熱可塑性エラストマーは、
剛性が高いために金属との密着性に劣る。このため、熱
可塑性エラストマーで構成されたブーツは、その固着部
が金属からなるジョイントの外輪または軸の表面との間
で滑りが生じて脱落し易いという欠点がある。Most of the boots for constant velocity joints of automobiles of this type are composed of a thermoplastic elastomer which is excellent in heat resistance, cold resistance and durability.
Poor adhesion to metal due to high rigidity. For this reason, the boot made of a thermoplastic elastomer has a drawback that slippage occurs easily between the boot and the outer ring of the joint or the surface of the shaft of the joint where the fixing portion is made of metal, and the boot easily falls off.
【０００４】[0004]
【発明が解決しようとする課題】そこで、上記特開平２
−２２１７６６号公報に記載されているものにあって
は、固着部の内周面に環状突隆部を形成して、固着部を
平ベルトで締め付ける構成とすることにより、シール性
および固着性の向上を図っている。しかしながら、この
構成のものでは、図４に示すように、環状突隆部ａが軸
線方向と直交する中心線ｂに対する角度αが４０度以下
の直線ｃに接する形状のもので、環状突隆部ａの軸方向
への広がりが小さいから、固着部の内径を外輪の外径よ
り小さくしても、装着状態で被装着部材である等速ジョ
イントの外輪に形成されているリング凹溝ｄに環状突隆
部ａが落ち込んでしまい、端縁角度ｅ，ｅに環状突隆部
ａの斜面ｆ，ｆの当接が不十分となり、十分なシール効
果を期待することができないという欠点がある。SUMMARY OF THE INVENTION Therefore, the above-mentioned Japanese Patent Laid-Open No.
In the one disclosed in Japanese Patent Laid-Open No. 221766/1990, an annular protrusion is formed on the inner peripheral surface of the fixing portion, and the fixing portion is fastened with a flat belt. We are trying to improve. However, in this structure, as shown in FIG. 4, the annular protrusion ridge a has a shape in which the annular protrusion ridge a is in contact with a straight line c whose angle α is 40 degrees or less with respect to a center line b orthogonal to the axial direction. Since a spreads a in the axial direction is small, even if the inner diameter of the fixed portion is smaller than the outer diameter of the outer ring, the ring groove d formed in the outer ring of the constant velocity joint, which is the mounted member in the mounted state, has an annular shape. The protruding ridge a is depressed, and the slanted surfaces f, f of the annular protruding ridge a are not sufficiently brought into contact with the edge angles e, e, so that a sufficient sealing effect cannot be expected.
【０００５】本発明は、このような従来のものの実状に
鑑み、熱可塑性エラストマーで構成されたブーツであっ
ても、その固着部の内周面に形成された突隆部を軸線方
向と直交する中心線に対して５０〜６５度（好ましくは
５０〜６０度）の角度をなす直線に接する形状とし、被
装着部材の外周面に上記環状突隆部より狭幅のリング凹
溝を形成したことにより、環状突隆部の軸方向両側部を
被装着部材のリング凹溝に係止させた状態で固着するこ
とができ、ブーツの固着部と被装着部材との間に滑りが
生ぜず、しかもきわめて高いシール強度を有するブーツ
の固着構造を提供することを目的とするものである。In view of the actual situation of such a conventional one, the present invention is such that, even in a boot made of a thermoplastic elastomer, the protrusions formed on the inner peripheral surface of the fixing portion are orthogonal to the axial direction. A ring concave groove narrower than the annular protrusion is formed on the outer peripheral surface of the mounted member so as to be in contact with a straight line forming an angle of 50 to 65 degrees (preferably 50 to 60 degrees) with respect to the center line. By this, it is possible to fix both sides of the annular protruding portion in the axial direction while being locked in the ring concave groove of the mounted member, and no slippage occurs between the fixed portion of the boot and the mounted member, and An object of the present invention is to provide a boot fixing structure having extremely high sealing strength.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するため次のように構成した。すなわち、本発明に係
るブーツの固着構造は、蛇腹部と蛇腹部の両端に被装着
部材に密に封止する固着部を有するブーツを被装着部材
に装着する固着構造において、少なくとも一方の固着部
の外周面に締具を装着する環状凹陥部を形成し、この環
状凹陥部に、その軸方向略中央部に環状凹溝部を形成す
るとともに、上記環状凹溝部に対応する環状凹陥部の内
周面に、軸線方向と直交する中心線に対して５０〜６５
度の角度をなす直線に接する形状で内方に突隆する環状
突隆部を形成し、被装着部材の外周面には、環状突隆部
より狭幅のリング凹溝を形成して、ブーツの固着部を環
状突隆部が被装着部材のリング凹溝に嵌入するように締
め付けて固着してなるものである。The present invention has the following constitution to achieve the above object. That is, the boot fixing structure according to the present invention is a fixing structure for mounting a boot to a mounted member, the boot having a bellows part and a fixing part tightly sealing the mounted member at both ends of the bellows part. An annular concave portion for mounting a fastener is formed on the outer peripheral surface of the annular concave portion, and an annular concave groove portion is formed in the annular concave portion at a substantially central portion in the axial direction, and an inner circumference of the annular concave portion corresponding to the annular concave groove portion is formed. 50 to 65 with respect to the center line orthogonal to the axial direction on the surface.
An annular protrusion that protrudes inward is formed in a shape that is in contact with a straight line that forms an angle of degrees, and a ring groove that is narrower than the annular protrusion is formed on the outer peripheral surface of the mounted member, and the boot is formed. The fixing portion is fixed by tightening so that the annular protruding portion fits into the ring concave groove of the mounted member.
【０００７】[0007]
【作用】本発明に係るブーツの固着構造においては、環
状凹陥部の内周面に軸線方向と直交する中心線に対して
５０〜６５度の角度をなす直線に接する形状で内方に突
隆する環状突隆部が形成されており、被装着部材の外周
面には環状突隆部より狭幅のリング凹溝が形成されてい
るので、環状凹陥部を締具で締め付けると、環状突隆部
が被装着部のリング凹溝内に嵌入し、かつその裾部がリ
ング凹溝の両端縁に係止した状態で固着部が被装着部材
に固着される。このため、固着部は被装着部材に強固に
固着されるとともに高いシール性が得られる。In the boot fixing structure according to the present invention, the inner peripheral surface of the annular recess has a shape that is in contact with a straight line that forms an angle of 50 to 65 degrees with respect to the center line orthogonal to the axial direction. Since the ring-shaped groove is formed on the outer peripheral surface of the mounted member and has a narrower width than that of the ring-shaped groove, the ring-shaped groove can be tightened by tightening the ring-shaped groove. The fixing portion is fixed to the mounted member in a state in which the portion is fitted into the ring concave groove of the mounted portion and the skirt portion is locked to both end edges of the ring concave groove. For this reason, the fixing portion is firmly fixed to the mounted member and high sealing property is obtained.
【０００８】[0008]
【実施例】図面には自動車の等速ジョイント用ブーツが
例示されている。図１において、１はブーツであり、こ
のブーツ１は、ポリエステル系、ポリウレタン系、ポリ
アミド系、ポリオレフィン系などの熱可塑性エラストマ
ーの単体またはこれらのブレンド体を、ブロー成形、射
出成形あるいは射出ブロー成形により単層あるいは多層
状に成形したものである。ブーツ１は、蛇腹部２の一端
に筒状の大径の固着部３を、かつ他端に筒状の小径の固
着部４を一体に形成してなるものである。ブーツ１を構
成する熱可塑性エラストマーは、引張弾性率（ＪＩＳ
Ｋ６３０１）が１００〜２０００Ｋｇ／ｃｍ2の比較的
強度が大である弾性材料である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show boots for constant velocity joints of automobiles. In FIG. 1, reference numeral 1 denotes a boot, which is formed by blow molding, injection molding, or injection blow molding of a single thermoplastic elastomer such as polyester, polyurethane, polyamide, or polyolefin, or a blend thereof. It is formed into a single layer or a multilayer. The boot 1 is formed by integrally forming a large cylindrical fixing portion 3 at one end of a bellows portion 2 and a small cylindrical fixing portion 4 at the other end. The thermoplastic elastomer forming the boot 1 has a tensile elastic modulus (JIS
K6301) is an elastic material having a relatively high strength of 100 to 2000 Kg / cm 2.
【０００９】固着部３および固着部４の外周面には、図
２に示すように、平ベルト状の締具５を装着するための
環状凹陥部６，７がそれぞれ形成されている。図３に詳
細を示すように、上記固着部３の環状凹陥部６には、そ
の軸方向略中央部に環状凹溝部８が形成されるととも
に、環状凹溝部８に対応する環状凹陥部６の内周面には
内方に突隆する環状突隆部９が形成されている。上記環
状凹溝部８は中央部の深い凹溝８ａとその両側にわたる
浅い凹溝８ｂの２段形状に形成されている。上記環状突
隆部９は、図３に示すように、軸線方向と直交する中心
線Ａに対する角度βが５０〜６５度をなす直線Ｂに接す
る形状に裾部９ｂ，９ｂが形成されている。一方、図２
および図３に示すように、被装着部材である等速ジョイ
ントの外輪１０には、その外周面にリング凹溝１１が形
成されている。環状凹陥部６の内周面の内径Ｄｂは、等
速ジョイントの外輪１０の外径Ｄｊと比べて同じかやや
大きく（Ｄｂ≦Ｄｊ）の関係を有する。リング凹溝１１
は、両端縁部１１ｂ，１１ｂを軸線に対して５０〜７０
度の角度で拡開状に形成したものであり、リング凹溝１
１はその両端縁部１１ｂ，１１ｂの端縁角部１１ｃ，１
１ｃがブーツ１の前記環状突隆部９の裾部９ｂ，９ｂの
略中央部分と対応するものである。なお、図１に示した
ものは、小径の固着部４も、大径の固着部３と同様に構
成されている。As shown in FIG. 2, annular recesses 6 and 7 for mounting the flat belt-shaped fasteners 5 are formed on the outer peripheral surfaces of the fixing portions 3 and 4, respectively. As shown in detail in FIG. 3, the annular recessed portion 6 of the fixing portion 3 is formed with an annular recessed groove portion 8 at a substantially central portion in the axial direction thereof, and the annular recessed portion 6 corresponding to the annular recessed groove portion 8 is formed. An annular protruding portion 9 is formed on the inner peripheral surface so as to protrude inward. The annular recessed groove portion 8 is formed in a two-step shape including a deep recessed groove 8a in the central portion and a shallow recessed groove 8b extending on both sides thereof. As shown in FIG. 3, the annular protrusion 9 has skirts 9b, 9b formed in a shape in contact with a straight line B having an angle β of 50 to 65 degrees with respect to a center line A orthogonal to the axial direction. On the other hand, FIG.
As shown in FIG. 3 and FIG. 3, a ring groove 11 is formed on the outer peripheral surface of the outer ring 10 of the constant velocity joint which is the member to be mounted. The inner diameter Db of the inner peripheral surface of the annular recess 6 has the same or slightly larger value (Db ≦ Dj) than the outer diameter Dj of the outer ring 10 of the constant velocity joint. Ring groove 11
Is 50 to 70 at both end edges 11b and 11b with respect to the axis.
The ring groove 1 is formed in an expanded shape at an angle of 1 degree.
1 is the end edge corners 11c and 1c of the two end edges 11b and 11b.
Reference numeral 1c corresponds to a substantially central portion of the hem portions 9b, 9b of the annular protruding portion 9 of the boot 1. In addition, in the structure shown in FIG. 1, the small-diameter fixing portion 4 has the same structure as the large-diameter fixing portion 3.
【００１０】本発明に係るブーツ１は、図２に示すよう
に、等速ジョイントに装着される。すなわち、ブーツ１
の固着部３は外輪１０に、固着部４は軸１２にそれぞれ
固着される。そして、ブーツ１の固着部３は等速ジョイ
ントの外輪１０に差し込んで被せるが、固着部３の内周
面に環状突隆部９があっても、それに対応して外周側に
２段形状の環状凹溝部８が形成されているので、外輪１
０に固着部３を差し込む過程では、環状凹溝部８が軸方
向に開くように変形して環状突隆部９が内周面と略同一
面まで没入するように内周面が弯曲変形して容易に挿入
することができ、環状突隆部９がリング凹溝１１に嵌入
する状態にすることができる。次いで、この状態で締具
５を締め付けると、内周面では環状突隆部９がリング凹
溝１１内に嵌入した状態で環状突隆部９の裾部の略中央
部分が外輪１０のリング凹溝１１の両端縁部１１ｂ，１
１ｂの端縁角部１１ｃ，１１ｃに係合するように圧着さ
れるが、環状突隆部９は軸線方向と直交する中心線Ａに
対する角度βが５０〜６５度をなす直線Ｂに接する形状
であるから、固着部３の内周面は、環状突隆部９が外輪
１０のリング凹溝１１で軸方向３箇所が圧着されること
になり、固着部３と外輪１０との間に滑りが生ぜず、し
かも固着部３と外輪１０との間のシール強度がきわめて
高くなる。なお、リング凹溝１１は両端部が拡開状に形
成されているので、裾部９ｂ，９ｂが広がった環状突隆
部９の形状とよく適合して環状突隆部９は全体に均等に
圧縮変形し、リング凹溝１１との係合状態が良好で、固
着部３と外輪１０との間のシール強度がいっそう高くな
る。The boot 1 according to the present invention is mounted on a constant velocity joint as shown in FIG. That is, boots 1
The fixing portion 3 is fixed to the outer ring 10, and the fixing portion 4 is fixed to the shaft 12. Then, the fixing portion 3 of the boot 1 is inserted into the outer ring 10 of the constant velocity joint to cover it, but even if the inner peripheral surface of the fixing portion 3 has an annular protrusion 9, a corresponding two-step shape is formed on the outer peripheral side. Since the annular groove 8 is formed, the outer ring 1
In the process of inserting the fixing portion 3 into 0, the annular concave groove portion 8 is deformed so as to open in the axial direction, and the inner peripheral surface is curved and deformed so that the annular protruding ridge 9 is recessed to approximately the same surface as the inner peripheral surface. It can be easily inserted, and the annular protrusion 9 can be fitted in the ring groove 11. Next, when the fastener 5 is tightened in this state, the annular projection ridge 9 is fitted into the ring concave groove 11 on the inner peripheral surface, and the substantially central portion of the skirt of the annular projection ridge 9 is the ring concave portion of the outer ring 10. Both edges 11b, 1 of the groove 11
1b is crimped so as to engage with the edge corners 11c, 11c, but the annular protruding ridge 9 has a shape in contact with a straight line B having an angle β of 50 to 65 degrees with respect to a center line A orthogonal to the axial direction. Therefore, on the inner peripheral surface of the fixing portion 3, the annular protruding portion 9 is crimped at the axial concave portions 11 of the outer ring 10 at three positions in the axial direction, and slippage occurs between the fixing portion 3 and the outer ring 10. The sealing strength between the fixed portion 3 and the outer ring 10 is extremely high. Since both ends of the ring recessed groove 11 are formed in an expanded shape, the ring recessed groove 11 fits well with the shape of the annular protruding ridge 9 in which the skirts 9b and 9b are widened, and the annular protruding ridge 9 is evenly distributed as a whole. It is compressed and deformed, the state of engagement with the ring groove 11 is good, and the sealing strength between the fixing portion 3 and the outer ring 10 is even higher.
【００１１】上記実施例では、環状凹溝部８が２段形状
をなしているが、その形状は例えば逆台形や先端が丸形
の半長円形などの形状であってもよいが、いずれの場合
でも角度βが５０〜６５度であることが重要である。ま
た、環状凹溝部８に環状凹溝部８の形状に応じた金属や
硬質樹脂からなる環状部材を埋め込むことにより、締具
５による締め状態を良好にして、さらに強力なシール強
度を得ることができる。In the above embodiment, the annular groove 8 has a two-step shape, but the shape may be, for example, an inverted trapezoid or a semi-oval shape with a round tip, but in any case. However, it is important that the angle β is 50 to 65 degrees. Further, by embedding an annular member made of a metal or a hard resin according to the shape of the annular groove 8 in the annular groove 8, the tightened state by the fastener 5 can be improved and stronger sealing strength can be obtained. .
【００１２】[0012]
【発明の効果】本発明に係るブーツ固着構造によれば、
熱可塑性エラストマーで構成されたブーツであっても、
その固着部の内周面に形成された環状突隆部が軸線方向
と直交する中心線に対して５０〜６０度の角度をなす直
線に接する形状であり、被装着部材の外周に上記環状突
隆部より狭幅のリング凹溝が形成されているので、環状
突隆部の軸方向両側部を被装着部材のリング凹溝に係止
させた状態で固着することができ、ブーツの固着部と被
装着部材との間に滑りが生ぜず、しかもきわめて高いシ
ール強度を得ることができる。According to the boot fixing structure according to the present invention,
Even boots made of thermoplastic elastomer,
The annular projection ridge formed on the inner peripheral surface of the fixed portion is in contact with a straight line forming an angle of 50 to 60 degrees with respect to a center line orthogonal to the axial direction, and the annular projection is formed on the outer periphery of the mounted member. Since the ring groove having a width narrower than that of the ridge is formed, it is possible to fix the annular protruding ridge in a state in which both sides in the axial direction are locked in the ring groove of the member to be mounted. There is no slip between the mounting member and the mounted member, and extremely high sealing strength can be obtained.
Claims (1)
に封止する固着部を有するブーツを被装着部材に装着す
る固着構造において、少なくとも一方の固着部の外周面
に締具を装着する環状凹陥部を形成し、この環状凹陥部
に、その軸方向略中央部に環状凹溝部を形成するととも
に、上記環状凹溝部に対応する環状凹陥部の内周面に、
軸線方向と直交する中心線に対して５０〜６５度の角度
をなす直線に接する形状で内方に突隆する環状突隆部を
形成し、被装着部材の外周面には、環状突隆部より狭幅
のリング凹溝を形成して、ブーツの固着部を環状突隆部
が被装着部材のリング凹溝に嵌入するように締め付けて
固着することを特徴とするブーツの固着構造。1. A fixing structure for mounting a boot having a bellows portion and fixing portions for tightly sealing the member to be attached to both ends of the bellows portion on the member to be attached, wherein a fastener is provided on an outer peripheral surface of at least one of the fixing portions. An annular concave portion to be mounted is formed, and in the annular concave portion, an annular concave groove portion is formed at a substantially central portion in the axial direction thereof, and an inner peripheral surface of the annular concave portion corresponding to the annular concave groove portion is formed.
An annular projecting ridge is formed which projects inwardly in a shape in contact with a straight line forming an angle of 50 to 65 degrees with respect to a center line orthogonal to the axial direction, and the annular projecting ridge is formed on the outer peripheral surface of the mounted member. A boot fixing structure characterized in that a ring recess groove having a narrower width is formed, and a fixing portion of the boot is tightened and fixed so that the annular protruding portion fits into the ring recess groove of the mounted member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15282593A JPH06341552A (en) | 1993-05-31 | 1993-05-31 | Fixing structure of boot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15282593A JPH06341552A (en) | 1993-05-31 | 1993-05-31 | Fixing structure of boot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06341552A true JPH06341552A (en) | 1994-12-13 |
Family
ID=15548971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15282593A Pending JPH06341552A (en) | 1993-05-31 | 1993-05-31 | Fixing structure of boot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06341552A (en) |
-
1993
- 1993-05-31 JP JP15282593A patent/JPH06341552A/en active Pending
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