JP5012771B2 - Constant velocity joint boots - Google Patents
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- JP5012771B2 JP5012771B2 JP2008303461A JP2008303461A JP5012771B2 JP 5012771 B2 JP5012771 B2 JP 5012771B2 JP 2008303461 A JP2008303461 A JP 2008303461A JP 2008303461 A JP2008303461 A JP 2008303461A JP 5012771 B2 JP5012771 B2 JP 5012771B2
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Description
本発明は、前輪駆動車のドライブシャフト用ジョイント等に不可欠な等速ジョイントに被覆され、等速ジョイントのジョイント部への水や埃の侵入を阻止する等速ジョイント用ブーツに関する。 The present invention relates to a boot for a constant velocity joint that is covered with a constant velocity joint that is indispensable for a drive shaft joint of a front wheel drive vehicle and prevents water and dust from entering the joint portion of the constant velocity joint.
等速ジョイントのジョイント部はグリースが封入された蛇腹形状の等速ジョイント用ブーツで覆われ、水や埃の侵入を防止することによって大角度で滑らかな回転が維持されている。このブーツは、ジョイントアウターレース等に保持される大径の大径筒部と、大径筒部より小径でシャフトに保持される小径筒部と、大径筒部と小径筒部を一体的に連結する略円錐台形状の蛇腹部から構成されている。そして使用時には、ジョイントアウターレースとシャフトの作動角（ジョイント角）の変化に応じて蛇腹部が変形するため、その角度が大きくなってもブーツによってジョイント部を確実にシールすることができる。 The joint portion of the constant velocity joint is covered with a bellows-shaped constant velocity joint boot filled with grease, and smooth rotation at a large angle is maintained by preventing water and dust from entering. This boot has a large-diameter and large-diameter cylindrical portion that is held by a joint outer race, a small-diameter cylindrical portion that is smaller than the large-diameter cylindrical portion and is held by a shaft, and a large-diameter cylindrical portion and a small-diameter cylindrical portion. It is comprised from the bellows part of the substantially truncated cone shape connected. In use, the bellows portion is deformed in accordance with the change in the operating angle (joint angle) between the joint outer race and the shaft, so that the joint portion can be reliably sealed by the boot even when the angle increases.
そして、ジョイントアウターレースと等速ジョイント用ブーツを組付する際、ジョイントアウターレースがブーツの蛇腹部へ挿入されすぎないようにする為、等速ジョイントブーツの大径筒部の内周側には環状の規制部が形成されている（特許文献１、２）。しかし、特許文献１及び特許文献２に記載の蛇腹部は、シャフトのなす角が大きくなると、大径筒部に連結した蛇腹部がシャフトの作動角によって追従しにくくなり、規制部に隣接した蛇腹部に応力が集中する。
また、蛇腹部への応力集中を避けようとして規制部の剛性を小さくすると、位置決めの機能が得られなくなる。
Further, if the rigidity of the restricting portion is reduced to avoid stress concentration on the bellows portion, the positioning function cannot be obtained.
本発明は上記した事情に鑑みてなされたものであり、ブーツ本体のみでジョイントアウターレースを確実に位置決めすると共に、シャフトの作動角によって、蛇腹部（特に第１蛇腹部）が追従しやすい等速ジョイント用ブーツを提供することを目的とする。 The present invention has been made in view of the above-described circumstances. The joint outer race is reliably positioned only by the boot body, and the bellows portion (particularly, the first bellows portion) easily follows the operating angle of the shaft. An object is to provide a joint boot.
本発明は、小径筒部と、該小径筒部と離間して同軸的に配置され該小径筒部より大径の大径筒部と、該小径筒部と該大径筒部を一体的に連結する略円錐台形状の蛇腹部とからなり、該大径筒部の外周表面から締結部材を縮径させることで相手部材に該大径筒部が締結される等速ジョイント用ブーツであって、前記大径筒部は、薄肉部と内周側へ突出する厚肉部とが内周側の周方向に交互に形成され、該薄肉部及び該厚肉部の内周表面には周方向に連続したリング状のシール突状を備え、前記蛇腹部に隣接する前記薄肉部の内側には、該薄肉部から径方向内側へ突出すると共に、隣接する厚肉部に両端が一体化された剛性部
が形成され、前記剛性部は、前記相手部材の軸方向への移動を規制し、軸方向へ垂直な面を持つ規制部と前記小径筒部へ向かうに従い径方向外方へ傾斜する傾斜部とを備えており、さらに前記剛性部の外周面には凹部が形成され、前記凹部の溝深さＤは前記薄肉部の肉厚Ｔ１よりも小さく、且つ該凹部の溝底から剛性部の最内端までの厚さＴ２は、該肉厚Ｔ１及び前記蛇腹部の肉厚Ｔ３よりも大きく設定されて、前記傾斜部と前記凹部は、周方向へ一周連続して形成されて、前記凹部の溝底部には軸方向に延びる直線部を有し、前記凹部に隣接する第１蛇腹部の外径は該凹部の溝底径Ｘよりも大きいことを特徴とする。
The present invention provides a small-diameter cylindrical portion, a large-diameter cylindrical portion that is coaxially disposed apart from the small-diameter cylindrical portion, and has a larger diameter than the small-diameter cylindrical portion, and the small-diameter cylindrical portion and the large-diameter cylindrical portion integrally. A constant velocity joint boot comprising a generally frustoconical bellows portion to be connected, wherein the large diameter cylindrical portion is fastened to the mating member by reducing the diameter of the fastening member from the outer peripheral surface of the large diameter cylindrical portion. The large-diameter cylindrical portion is formed by alternately forming a thin portion and a thick portion protruding toward the inner peripheral side in the circumferential direction on the inner peripheral side, and a circumferential direction on the inner peripheral surface of the thin portion and the thick portion. A ring-shaped seal projection that is continuous with the bellows, and protrudes radially inward from the thin portion inside the thin portion adjacent to the bellows portion, and both ends are integrated into the adjacent thick portion. A rigid portion is formed, and the rigid portion restricts movement of the mating member in the axial direction, to a restricting portion having a surface perpendicular to the axial direction and the small diameter cylindrical portion. And a concave portion is formed on the outer peripheral surface of the rigid portion, and the groove depth D of the concave portion is smaller than the wall thickness T1 of the thin portion, The thickness T2 from the groove bottom of the concave portion to the innermost end of the rigid portion is set to be larger than the thickness T1 and the thickness T3 of the bellows portion, and the inclined portion and the concave portion are arranged in the circumferential direction. The groove bottom portion of the recess has a linear portion extending in the axial direction, and the outer diameter of the first bellows portion adjacent to the recess is larger than the groove bottom diameter X of the recess. Features.
剛性部１７は、軸方向へ垂直な面を持つ規制部１７ａと小径筒部１０へ向かうに従い径方向外方へ傾斜する傾斜部１７ｂで構成され、さらに外周面には溝底部に軸方向に延びる直線部を有する凹部１７ｃが形成されている。傾斜部１７ｂと凹部１７ｃは周方向へ一周連続して形成されている。また、凹部１７ｃに隣接する第１蛇腹部１２ａの第１山部１２ｂの外径は、凹部１７ｃの溝底径Ｘよりも大きく形成されている。この為、蛇腹部１２（第１蛇腹部１２ａ）が傾斜部１７ｂに当接するように大径筒部１１側へ変形し、第１蛇腹部１２ａが傾斜部１７ｂに規制されながら、第１山部１２ｂが凹部１７ｃへ変形することができる。従って、大径筒部１１（薄肉部１４）内に挿入されるジョイントアウターレース３の位置決めができ、シャフト６の作動角に対応して蛇腹部１２が追従して変形することができる。 The rigid portion 17 includes a restricting portion 17a having a surface perpendicular to the axial direction and an inclined portion 17b that inclines radially outward toward the small-diameter cylindrical portion 10, and further extends axially to the groove bottom portion on the outer peripheral surface. A concave portion 17c having a straight portion is formed. The inclined part 17b and the recessed part 17c are continuously formed in the circumferential direction. Moreover, the outer diameter of the 1st peak part 12b of the 1st bellows part 12a adjacent to the recessed part 17c is formed larger than the groove bottom diameter X of the recessed part 17c. For this reason, the bellows portion 12 (first bellows portion 12a) is deformed toward the large-diameter cylindrical portion 11 so as to come into contact with the inclined portion 17b, and the first bellows portion 12a is regulated by the inclined portion 17b. 12b can be deformed into the recess 17c. Therefore, the joint outer race 3 inserted into the large diameter cylindrical portion 11 (thin wall portion 14) can be positioned, and the bellows portion 12 can be deformed following the operating angle of the shaft 6.
シャフトの作動角に対応して、蛇腹部が追従しやすい等速ジョイント用ブーツを簡易な構成で実現した。 Corresponding to the operating angle of the shaft, a constant velocity joint boot that the bellows part can easily follow was realized with a simple configuration.
以下、実施例により本発明を具体的に説明する。 Hereinafter, the present invention will be described specifically by way of examples.
（実施例１）
図１に本実施例の等速ジョイント用ブーツの斜視図を、図２にブーツの大径筒部側から見た断面図を、図３に図２のＸ−Ｘで切った断面図を示す。また、図４に要部拡大斜視図を、図５に等速ジョイント用ブーツをジョイントアウターレースにクランプで締結した状態の要部拡大断面図、図６に図２のＹ−Ｙ断面図を示す。この等速ジョイント用ブーツ１は、熱可塑性エラストマ材料から射出ブロー成形により形成されている。等速ジョイント用ブーツ１は、小径筒部１０と、小径筒部１０より大径の大径筒部１１と、小径筒部１０と大径筒部１１を一体的に連結する略円錐台形状の蛇腹部１２とよりなる。
Example 1
1 is a perspective view of a constant velocity joint boot according to the present embodiment, FIG. 2 is a cross-sectional view of the boot viewed from the large-diameter cylindrical portion side, and FIG. 3 is a cross-sectional view taken along line XX of FIG. . 4 is an enlarged perspective view of an essential part, FIG. 5 is an enlarged sectional view of an essential part in a state where a constant velocity joint boot is fastened to a joint outer race by a clamp, and FIG. 6 is an YY sectional view of FIG. . The constant velocity joint boot 1 is formed from a thermoplastic elastomer material by injection blow molding. The constant velocity joint boot 1 has a small-diameter cylindrical portion 10, a large-diameter cylindrical portion 11 having a larger diameter than the small-diameter cylindrical portion 10, and a substantially truncated cone shape that integrally connects the small-diameter cylindrical portion 10 and the large-diameter cylindrical portion 11. It consists of a bellows part 12.
この等速ジョイント用ブーツ１は、大径筒部１１がジョイントアウターレース３（相手部材）に被着され、大径筒部１１の外周からクランプ２（締結部材）によって締結される。ジョイントアウターレース３は、先端に３個のローラが回動自在に保持されたシャフト６が挿通されるため、外周形状が非円形となっている。大径筒部１１の外周は断面真円形であるが、内周表面はジョイントアウターレース３の外周表面に対応した非円形の異形断面をなし、厚肉部１３と薄肉部１４とが円周方向に交互に形成されている。厚肉部１３は、図１に示すように、大肉部１３ａと中肉部１３ｂとで構成されている。 In this constant velocity joint boot 1, a large-diameter cylindrical portion 11 is attached to a joint outer race 3 (a mating member), and is fastened by a clamp 2 (fastening member) from the outer periphery of the large-diameter cylindrical portion 11. The joint outer race 3 has a non-circular outer peripheral shape because a shaft 6 having three rollers rotatably held at its tip is inserted. The outer periphery of the large-diameter cylindrical portion 11 has a perfectly circular cross section, but the inner peripheral surface has a non-circular deformed cross section corresponding to the outer peripheral surface of the joint outer race 3, and the thick portion 13 and the thin portion 14 are circumferential. Are alternately formed. As shown in FIG. 1, the thick portion 13 is composed of a large portion 13a and a middle portion 13b.
大径筒部１１は射出成形によって形成され、図３に示すように、その端面には径方向外方へ突出するリング状のクランプ位置決めリブ１５が形成されている。大径筒部１１の外周表面には図５に示すようにクランプ２が配置され、クランプ位置決めリブ１５はクランプ２の脱落を防止している。厚肉部１３と薄肉部１４の内周表面には、ジョイントアウターレース３に弾接する三条のリング状のシール突条１６が円周方向に延びて全周に互いに平行に形成されている。 The large diameter cylindrical portion 11 is formed by injection molding, and as shown in FIG. 3, a ring-shaped clamp positioning rib 15 protruding outward in the radial direction is formed on the end surface. As shown in FIG. 5, the clamp 2 is disposed on the outer peripheral surface of the large-diameter cylindrical portion 11, and the clamp positioning rib 15 prevents the clamp 2 from falling off. On the inner peripheral surfaces of the thick portion 13 and the thin portion 14, three ring-shaped seal protrusions 16 that elastically contact the joint outer race 3 extend in the circumferential direction and are formed in parallel to each other on the entire circumference.
蛇腹部１２は、図３、図５、図６に示すように、大径筒部１１より第１山部１２ｂ、第１谷部１２ｃ、の順で形成され、第１山部１２ｂと第１谷部１２ｃで第１蛇腹部１２ａが構成されている。 As shown in FIGS. 3, 5, and 6, the bellows portion 12 is formed in the order of the first peak portion 12 b and the first valley portion 12 c from the large-diameter cylindrical portion 11. A first bellows portion 12a is configured by the valley portion 12c.
大径筒部１１の薄肉部１４内側には、薄肉部１４から径方向内側へ突出する剛性部１７が形成されている。剛性部１７は、大径筒部１１内に挿入されるジョイントアウターレース３を位置決めし且つ軸方向に垂直な面を持つ規制部１７ａと、小径筒部１０側へ向かうに従い径外方向へ傾斜する傾斜部１７ｂと、さらに剛性部１７の外周面に形成された凹部１７ｃとを備えている。 A rigid portion 17 that protrudes radially inward from the thin portion 14 is formed inside the thin portion 14 of the large diameter cylindrical portion 11. The rigid portion 17 positions the joint outer race 3 inserted into the large-diameter cylindrical portion 11 and tilts outward in the radial direction toward the small-diameter cylindrical portion 10 side with a regulating portion 17a having a surface perpendicular to the axial direction. An inclined portion 17b and a concave portion 17c formed on the outer peripheral surface of the rigid portion 17 are further provided.
薄肉部１４の肉厚Ｔ１は１．４ｍｍ、凹部１７ｃの溝深さＤは１．１ｍｍ、凹部１７ｃの溝底から規制部１７ａの最内端までの厚さＴ２は３．４ｍｍ、蛇腹部１２の肉厚Ｔ３は１．０ｍｍで設定され、Ｔ１＞Ｄ、Ｔ２＞Ｔ１、Ｔ２＞Ｔ３となっている。この為、剛性部１７は剛性高く蛇腹部１２のように伸縮しないようになっている。従って、ジョイントアウターレース３と等速ジョイント用ブーツ１を組付けする際、規制部１７ａがジョイントアウターレース３の端面に当接して、ジョイントアウターレース３が蛇腹部１２へ挿入されすぎないようになっている。 The thickness T1 of the thin portion 14 is 1.4 mm, the groove depth D of the concave portion 17c is 1.1 mm, the thickness T2 from the groove bottom of the concave portion 17c to the innermost end of the restricting portion 17a is 3.4 mm, and the bellows portion 12 The wall thickness T3 is set to 1.0 mm, and T1> D, T2> T1, and T2> T3. For this reason, the rigid portion 17 has high rigidity and does not expand and contract like the bellows portion 12. Therefore, when assembling the joint outer race 3 and the constant velocity joint boot 1, the restricting portion 17 a comes into contact with the end surface of the joint outer race 3 so that the joint outer race 3 is not inserted too much into the bellows portion 12. ing.
図３に示すように、大肉部１３ａから第１蛇腹部１２ａの間には、大肉部１３ａの内周面から軸方向へ延びるストレート部１８ａと径外方へ傾斜する連絡部１８ｂとが配置されている。また、連絡部１８ｂの内周側には薄肉部１４と同じ傾斜角度θを持つ傾斜部１７ｂが形成され（図５参照）、連絡部１８ｂの外周面（第１山部１２ａに隣接した箇所）には薄肉部１４と同じ溝底径Ｘを持つ凹部１７ｃが形成されている。 As shown in FIG. 3, a straight portion 18a extending in the axial direction from the inner peripheral surface of the large thickness portion 13a and a connecting portion 18b inclined radially outward are disposed between the large thickness portion 13a and the first bellows portion 12a. ing. Further, an inclined portion 17b having the same inclination angle θ as the thin portion 14 is formed on the inner peripheral side of the connecting portion 18b (see FIG. 5), and the outer peripheral surface of the connecting portion 18b (a location adjacent to the first peak portion 12a). A recess 17c having the same groove bottom diameter X as the thin portion 14 is formed.
図６に示すように、中肉部１３ｂと第１蛇腹部１２ａとの間にも、薄肉部１４と同じ傾斜角度θを持つ傾斜部１７ｂと同じ溝底径Ｘを持つ凹部１７ｃが形成されている。つまり、傾斜部１７ｂと凹部１７ｃはそれぞれ、同じ傾斜角度θ、同じ溝底径Ｘで周方向に一周連続して形成している。 As shown in FIG. 6, a concave portion 17c having the same groove bottom diameter X as the inclined portion 17b having the same inclination angle θ as that of the thin portion 14 is formed between the middle portion 13b and the first bellows portion 12a. Yes. That is, the inclined portion 17b and the recessed portion 17c are continuously formed in the circumferential direction with the same inclination angle θ and the same groove bottom diameter X, respectively.
本実施例の等速ジョイント用ブーツ１を、シャフト６の作動角が小・中・大となるようにして用いた場合の変形状態をＦＥＡにて解析した。結果を図７に示す。シャフト６の作動角が小さい場合（小角度時ａ）、蛇腹部１２の第１蛇腹部１２ａが傾斜部１７ｂに当接するように大径筒部１１側へ変形する。さらに作動角を大きくすると（中角度時ｂ）、蛇腹部１２の各谷部がシャフト６の外周表面に倣うように当接し、さらに作動角が大きくなると（大角度時ｃ）、第１蛇腹部１２ａが傾斜部１７ｂに規制されながら、第１山部１２ｂが凹部１７ｃへ変形する。つまり、凹部１７ｃは剛性部１７の変形量を最小限にとどめて、第１蛇腹部１２ａ（第１山部１２ｂ）の変形を促すように作用する。従って、ジョイントアウターレース３を等速ジョイント用ブーツ１に組付けする際、ジョイントアウターレース３が蛇腹部１２へ挿入されすぎないように、規制部１７ａ（剛性部１７）の剛性を設定することが可能となり、またシャフト６の作動角が大きくなっても、作動角に対応して蛇腹部１２が追従して変形することができる。 The deformation state when using the constant velocity joint boot 1 of this embodiment so that the operating angle of the shaft 6 is small, medium and large was analyzed by FEA. The results are shown in FIG. When the operating angle of the shaft 6 is small (when the angle is small), the first bellows portion 12a of the bellows portion 12 is deformed toward the large-diameter cylindrical portion 11 so as to contact the inclined portion 17b. When the operating angle is further increased (b at medium angle), each valley portion of the bellows portion 12 comes into contact with the outer peripheral surface of the shaft 6 and when the operating angle is further increased (c at large angle), the first bellows portion. While 12a is regulated by the inclined portion 17b, the first peak portion 12b is deformed into the concave portion 17c. That is, the concave portion 17c acts to minimize the amount of deformation of the rigid portion 17 and to promote deformation of the first bellows portion 12a (first peak portion 12b). Therefore, when the joint outer race 3 is assembled to the constant velocity joint boot 1, the rigidity of the restricting portion 17 a (the rigid portion 17) can be set so that the joint outer race 3 is not inserted too much into the bellows portion 12. In addition, even if the operating angle of the shaft 6 is increased, the bellows portion 12 can be deformed following the operating angle.
なお、傾斜部１７ｂの傾斜角度θは、４５度で設定されている。この傾斜角度θは３０度以上、６０度以下にすることが好ましい。傾斜角度θが３０度より小さくなると、ジョイントアウターレース３を規制する剛性部１７と機能せず、また６０度より大きくなると、等速ジョイント用ブーツ１から中芯を抜きにくくなり、成形が困難となるからである。 The inclination angle θ of the inclined portion 17b is set at 45 degrees. This inclination angle θ is preferably 30 degrees or more and 60 degrees or less. When the inclination angle θ is smaller than 30 degrees, the rigid portion 17 that restricts the joint outer race 3 does not function. When the inclination angle θ is larger than 60 degrees, it is difficult to remove the center from the constant velocity joint boot 1 and molding is difficult. Because it becomes.
以上のように本実施例によれば、剛性部１７の規制部１７ａによりジョイントアウターレース３が確実に位置決めされ、全周にわたって形成された傾斜部１７ｂ及び凹部１７ｃによりシャフト６の作動角に対応して、蛇腹部１２の変形が可能となる。 As described above, according to the present embodiment, the joint outer race 3 is reliably positioned by the restricting portion 17a of the rigid portion 17, and corresponds to the operating angle of the shaft 6 by the inclined portion 17b and the recessed portion 17c formed over the entire circumference. Thus, the bellows portion 12 can be deformed.
１ 等速ジョイント用ブーツ
２ クランプ（締結部材）
３ ジョイントアウターレース（相手部材）
６ シャフト
１０ 小径筒部
１１ 大径筒部
１２ 蛇腹部
１２ａ 第１蛇腹部
１２ｂ 第１山部
１２ｃ 第１谷部
１３ 厚肉部
１３ａ 大肉部
１３ｂ 中肉部
１４ 薄肉部
１５ クランプ位置決めリブ
１６ シール突状
１７ 剛性部
１７ａ 規制部
１７ｂ 傾斜部
１７ｃ 凹部
１８ａ ストレート部
１８ｂ 連絡部
1 Constant velocity joint boot 2 Clamp (fastening member)
3 Joint outer race (mating member)
6 Shaft 10 Small diameter cylindrical portion 11 Large diameter cylindrical portion 12 Bellows portion 12a First bellow portion 12b First peak portion 12c First valley portion 13 Thick portion 13a Large portion 13b Medium portion 14 Thin portion 15 Clamp positioning rib 16 Seal protrusion Shape 17 Rigid part 17a Restricting part 17b Inclined part 17c Recessed part 18a Straight part 18b Connecting part
Claims (1)
該大径筒部（１１）の外周表面から締結部材（２）を縮径させることで相手部材（３）に該大径筒部（１１）が締結される等速ジョイント用ブーツ（１）であって、
前記大径筒部（１１）は、薄肉部（１４）と内周側へ突出する厚肉部（１３）とが内周側の周方向に交互に形成され、該薄肉部（１４）及び該厚肉部（１３）の内周表面には周方向に連続したリング状のシール突状（１６）を備え、
前記蛇腹部（１２）に隣接する前記薄肉部（１４）の内側には、該薄肉部（１４）から径方向内側へ突出すると共に、隣接する厚肉部（１３）に両端が一体化された剛性部（１７）が形成され、
前記剛性部（１７）は、前記相手部材（３）の軸方向への移動を規制し、軸方向へ垂直な面を持つ規制部（１７ａ）と前記小径筒部（１０）へ向かうに従い径方向外方へ傾斜する傾斜部（１７ｂ）と、を備えており、
さらに前記剛性部（１７）の外周面には、凹部（１７ｃ）が形成され、
前記凹部（１７ｃ）の溝深さＤは前記薄肉部（１４）の肉厚Ｔ１よりも小さく、且つ該凹部（１７ｃ）の溝底から剛性部（１７）の最内端までの厚さＴ２は、該肉厚Ｔ１及び前記蛇腹部（１２）の肉厚Ｔ３よりも大きく設定されて、
前記傾斜部（１７ｂ）と前記凹部（１７ｃ）は、周方向へ一周連続して形成されており、
前記凹部（１７ｃ）の溝底部には軸方向に延びる直線部を有し、
前記凹部（１７ｃ）に隣接する第１蛇腹部（１２ａ）の外径は該凹部（１７ｃ）の溝底径Ｘよりも大きいことを特徴とする等速ジョイント用ブーツ。
A small-diameter cylindrical portion (10), a large-diameter cylindrical portion (11) that is coaxially disposed apart from the small-diameter cylindrical portion (10) and has a larger diameter than the small-diameter cylindrical portion (10), and the small-diameter cylindrical portion (10 ) And the bellows portion (12) having a substantially truncated cone shape that integrally connects the large-diameter cylindrical portion (11),
A constant velocity joint boot (1) in which the large diameter cylindrical portion (11) is fastened to the mating member (3) by reducing the diameter of the fastening member (2) from the outer peripheral surface of the large diameter cylindrical portion (11). There,
The large-diameter cylindrical portion (11) includes thin-walled portions (14) and thick-walled portions (13) projecting toward the inner peripheral side, which are alternately formed in the circumferential direction on the inner peripheral side. The inner peripheral surface of the thick wall portion (13) includes a ring-shaped seal protrusion (16) continuous in the circumferential direction,
The thin-walled portion (14) adjacent to the bellows portion (12) protrudes radially inward from the thin-walled portion (14), and both ends are integrated with the adjacent thick-walled portion (13). A rigid portion (17) is formed,
The rigid portion (17) restricts the movement of the mating member (3) in the axial direction, and moves in the radial direction toward the restricting portion (17a) having a surface perpendicular to the axial direction and the small diameter cylindrical portion (10). An inclined portion (17b) that is inclined outward,
Furthermore, a concave portion (17c) is formed on the outer peripheral surface of the rigid portion (17),
The groove depth D of the recess (17c) is smaller than the thickness T1 of the thin wall portion (14), and the thickness T2 from the groove bottom of the recess (17c) to the innermost end of the rigid portion (17) is , Larger than the wall thickness T1 and the wall thickness T3 of the bellows portion (12),
The inclined portion (17b) and the concave portion (17c) are continuously formed in the circumferential direction.
The groove bottom of the recess (17c) has a linear portion extending in the axial direction,
The constant velocity joint boot according to claim 1, wherein an outer diameter of the first bellows part (12a) adjacent to the concave part (17c) is larger than a groove bottom diameter X of the concave part (17c) .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008303461A JP5012771B2 (en) | 2008-11-28 | 2008-11-28 | Constant velocity joint boots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008303461A JP5012771B2 (en) | 2008-11-28 | 2008-11-28 | Constant velocity joint boots |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010127407A JP2010127407A (en) | 2010-06-10 |
| JP5012771B2 true JP5012771B2 (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008303461A Expired - Fee Related JP5012771B2 (en) | 2008-11-28 | 2008-11-28 | Constant velocity joint boots |
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| Country | Link |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5777918B2 (en) * | 2011-03-30 | 2015-09-09 | 東洋ゴム工業株式会社 | Joint boots |
| KR101775504B1 (en) * | 2016-06-20 | 2017-09-06 | 서한산업(주) | A constant velocity joint assembly and a housing for the constant velocity joint |
| KR102228951B1 (en) * | 2017-01-11 | 2021-03-18 | 게케엔 드리펠린 인터나쇼날 게엠베하 | Bellows with at least one inner groove |
| DE102017100431B3 (en) * | 2017-01-11 | 2018-03-01 | Gkn Driveline International Gmbh | Bellows with at least two grooves in praise areas and / or guide areas |
| KR102365186B1 (en) * | 2019-12-26 | 2022-02-21 | 현대위아 주식회사 | Constant velocity joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4794867B2 (en) * | 2005-02-18 | 2011-10-19 | Ｎｔｎ株式会社 | Constant velocity universal joint with boots |
| JP4528706B2 (en) * | 2005-10-04 | 2010-08-18 | 本田技研工業株式会社 | Fitting boots |
| JP2007321923A (en) * | 2006-06-02 | 2007-12-13 | Nok Corp | Boot for universal coupling |
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| Publication number | Publication date |
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| JP2010127407A (en) | 2010-06-10 |
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