JP2020008093A

JP2020008093A - Boot band

Info

Publication number: JP2020008093A
Application number: JP2018129864A
Authority: JP
Inventors: 武美此本; Takemi Konomoto
Original assignee: NTN Corp; NTN Toyo Bearing Co Ltd
Current assignee: NTN Corp
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2020-01-16

Abstract

To suppress the deformation of an engagement claw and an engagement hole, and to enhance assembling performance.SOLUTION: A boot band 16 comprises: a strip-shaped member 30; a first tool claw 32 protruding from an external peripheral face of the strip-shaped member; a plurality of engagement claws 33, 34 arranged at an end side of one end part 31 rather than the first tool claw 32, and protruding from an external peripheral face of the one end part; a plurality of engagement holes 36 formed at the end part 35, and fit with the engagement claws 33, 34; and a second tool claw 37 arranged at an end side of another end part 35 rather than the engagement holes 36, and protruding from an external peripheral face of the other end part. The strip-shaped member 30 is wound around an external periphery of a boot in a ring shape, the one end part 31 and the other end part 35 are superimposed so that the one end part 31 is located inside, the first tool claw 32 and the second tool claw 37 are made close to each other, and the engagement claw 34 is locked to peripheral edges of the engagement holes 36, thus fastening the boot. The strip-shaped member comprises an opening part 38 opened toward the second tool claw 37, and a slit part 39 which is formed so as to straddle a clearance between the engagement holes 36 and the opening part 38.SELECTED DRAWING: Figure 2

Description

本発明は、例えばドライブシャフトやプロペラシャフトに組み込まれる固定式および摺動式等速自在継手に取り付けられ、継手外部からの異物侵入や継手内部からの潤滑剤漏洩を防止するためのブーツを締め付けるブーツバンドに関する。 The present invention is applied to a fixed type and a sliding type constant velocity universal joint incorporated in a drive shaft or a propeller shaft, for example, and a boot for tightening a boot for preventing foreign matter from entering the outside of the joint and leakage of lubricant from inside the joint. About the band.

例えば、自動車のエンジンから車輪に回転力を等速で伝達する手段として使用される等速自在継手には、固定式等速自在継手と摺動式等速自在継手の二種がある。これら両者の等速自在継手は、駆動側と従動側の二軸を連結してその二軸が作動角をとっても等速で回転トルクを伝達し得る構造を備えている。 For example, there are two types of constant velocity universal joints used as means for transmitting a rotational force from an automobile engine to wheels at a constant speed, a fixed type constant velocity universal joint and a sliding type constant velocity universal joint. Both of these constant velocity universal joints have a structure in which two shafts on the driving side and the driven side are connected to each other and can transmit rotational torque at a constant speed even when the two shafts have an operating angle.

自動車のエンジンから駆動車輪に動力を伝達するドライブシャフトは、エンジンと車輪との相対的位置関係の変化による角度変位と軸方向変位に対応する必要があるため、一般的にエンジン側（インボード側）に摺動式等速自在継手を、駆動車輪側（アウトボード側）に固定式等速自在継手をそれぞれ装備し、両者の等速自在継手を中間シャフトで連結した構造を具備する。 A drive shaft that transmits power from an automobile engine to drive wheels needs to cope with an angular displacement and an axial displacement due to a change in the relative positional relationship between the engine and the wheels. ) Is equipped with a sliding type constant velocity universal joint and a fixed type constant velocity universal joint on the drive wheel side (outboard side), respectively, and has a structure in which both constant velocity universal joints are connected by an intermediate shaft.

これら摺動式等速自在継手あるいは固定式等速自在継手では、継手内部に封入されたグリース等の潤滑剤の漏洩を防ぐと共に継手外部からの異物侵入を防止するため、等速自在継手の外側継手部材と中間シャフトとの間にブーツを装着している。この種のブーツは、ブーツバンド（例えば、特許文献１参照）で締め付けて外側継手部材および中間シャフトに固定することによりシール性が確保されている。 In these sliding type constant velocity universal joints or fixed type constant velocity universal joints, the outside of the constant velocity universal joint is used to prevent leakage of lubricant such as grease sealed inside the joint and to prevent foreign matter from entering the outside of the joint. A boot is mounted between the joint member and the intermediate shaft. This type of boot secures the sealing performance by being fastened with a boot band (for example, see Patent Document 1) and fixed to the outer joint member and the intermediate shaft.

従来のブーツバンド１１０は、図６（ａ），（ｂ）に示すように、帯板状部材１２０の一端部１２１に係合爪１３１，１３２および第一の工具爪１４１を設けると共に、他端部１２２に係合孔１３３，１３４および第二の工具爪１４２を設けた構造を具備する。このブーツバンド１１０の場合、二つの係合爪１３１，１３２とこれら係合爪１３１，１３２のそれぞれが嵌まり込む二つの係合孔１３３，１３４とが設けられている。 As shown in FIGS. 6A and 6B, the conventional boot band 110 is provided with engagement claws 131 and 132 and a first tool claw 141 at one end 121 of a band-shaped member 120 and the other end. The part 122 has a structure in which the engagement holes 133 and 134 and the second tool pawl 142 are provided. In the case of the boot band 110, two engagement claws 131, 132 and two engagement holes 133, 134 into which the respective engagement claws 131, 132 fit are provided.

図７に示すように、帯板状部材１２０をブーツ（図示せず）にリング状に巻回して帯板状部材１２０の一端部１２１と他端部１２２とを重ね合わせた状態から、図８に示すように、第一の工具爪１４１と第二の工具爪１４２とを工具（図示せず）で強制的に近接させることにより係合爪１３１，１３２を係合孔１３３，１３４に嵌め込んでそれぞれの周縁部に係止させることでブーツを締め付けて外側継手部材および中間シャフトに固定するようにしている。 As shown in FIG. 7, the band plate-shaped member 120 is wound around a boot (not shown) in a ring shape and one end 121 and the other end 122 of the band plate-shaped member 120 are overlapped with each other. As shown in (1), the engaging claws 131 and 132 are fitted into the engaging holes 133 and 134 by forcibly bringing the first and second tool claws 141 and 142 close to each other with a tool (not shown). Then, the boots are tightened by being locked to the respective peripheral portions, so that the boots are fixed to the outer joint member and the intermediate shaft.

特許第４４０３７２８号公報Japanese Patent No. 4403728

ところで、従来のブーツバンド１１０では、図７に示すように、帯板状部材１２０の一端部１２１と他端部１２２とを重ね合わせた状態では、係合爪１３１，１３２が設けられた一端部１２１が内側に、係合孔１３３，１３４が設けられた他端部１２２が外側になっている。そのため、内側に位置する係合爪１３１，１３２が外側に突出した形状をなすことから、図９に示すように、帯板状部材１２０の他端部１２２が係合爪１３１，１３２を乗り越える時に、係合爪１３１，１３２が帯板状部材１２０の他端部１２２により内側に押し潰され、逆に、係合孔１３３，１３４の周縁部が係合爪１３１，１３２により外側に押し上げられる。 By the way, in the conventional boot band 110, as shown in FIG. 7, when the one end portion 121 and the other end portion 122 of the band-shaped member 120 are overlapped, one end portion provided with the engagement claws 131 and 132 is provided. 121 is inside and the other end 122 provided with the engagement holes 133 and 134 is outside. For this reason, since the engagement claws 131 and 132 located on the inner side have a shape protruding outward, as shown in FIG. 9, when the other end 122 of the strip-shaped member 120 gets over the engagement claws 131 and 132, The engaging claws 131 and 132 are crushed inward by the other end 122 of the band-shaped member 120, and conversely, the peripheral edges of the engaging holes 133 and 134 are pushed outward by the engaging claws 131 and 132.

このようにして、係合爪１３１，１３２および係合孔１３３，１３４に変形が生じると、第一の工具爪１４１および第二の工具爪１４２とを強制的に近接させるブーツバンド１１０の締め付け時に、係合爪１３１，１３２を係合孔１３３，１３４を周縁部に係止させることが困難となる。その結果、ブーツバンド１１０によりブーツを締め付けることが難しくなって組み付け性の低下を招くおそれがある。 In this manner, when the engagement claws 131 and 132 and the engagement holes 133 and 134 are deformed, the tightening of the boot band 110 forcibly bringing the first tool claw 141 and the second tool claw 142 close together. Therefore, it is difficult to lock the engaging claws 131 and 132 with the engaging holes 133 and 134 at the peripheral edge. As a result, it is difficult to tighten the boots with the boot band 110, and there is a possibility that the assemblability may be reduced.

本発明は、係合爪および係合孔の変形を抑制し、組み付け性の向上を図り得るブーツバンドを提供することを課題とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a boot band capable of suppressing deformation of an engagement claw and an engagement hole and improving assemblability.

上記の課題を解決するために創案された本発明は、帯板状部材と、帯板状部材の一端部に設けられその外周面から突出する第一の工具爪と、第一の工具爪よりも一端部の端側に設けられその外周面から突出する係合爪と、帯板状部材の他端部に設けられ係合爪が嵌まり込む係合孔と、係合孔よりも他端部の端側に設けられその外周面から突出する第二の工具爪とを備え、帯板状部材をブーツの外周にリング状に巻回して一端部と他端部とを一端部が内側となるように重ね合わせ、第一の工具爪と第二の工具爪とを近接させて係合孔の周縁部に係合爪を係止させることによりブーツを締め付けるブーツバンドであって、帯板状部材が、係合孔よりも他端部の端側に設けられた貫通孔と、係合孔および貫通孔の間に跨るように設けられたスリット部とを備えていることを特徴とする。このような構成によれば、帯板状部材をリング状に成形して帯板状部材の一端部と他端部とを重ね合わせた状態から、帯板状部材の他端部が一端部の係合爪を乗り越える時、その係合爪がスリット部に収容された状態となる。スリット部は、係合孔および貫通孔の間に跨るように設けられているため、この区間で係合爪をスリット部に収容し続けることができる。その結果、帯板状部材の他端部が係合爪と干渉することを大幅に緩和できるため、係合爪および係合孔の変形を確実に抑制できる。このように係合爪および係合孔の変形を抑制することで、係合爪を係合孔の周縁部に容易に係止できるため、組み付け性の向上を図ることができる。 The present invention created in order to solve the above-mentioned problem, a strip-shaped member, a first tool claw provided at one end of the strip-shaped member and protruding from the outer peripheral surface thereof, An engagement claw provided on an end side of one end and protruding from an outer peripheral surface thereof; an engagement hole provided on the other end of the band-shaped member to which the engagement claw fits; and the other end than the engagement hole A second tool claw provided on the end side of the part and protruding from the outer peripheral surface thereof, the band-shaped member is wound in a ring shape around the outer periphery of the boot, and one end and the other end are inward. A boot band for tightening the boot by overlapping the first tool claw and the second tool claw so that the first tool claw and the second tool claw are brought close to each other so that the engagement claw is locked to a peripheral portion of the engagement hole; The member is provided with a through hole provided on the end side of the other end portion with respect to the engagement hole, and a slit provided so as to straddle between the engagement hole and the through hole. Characterized in that it comprises and. According to such a configuration, from the state where the band-shaped member is formed into a ring shape and one end and the other end of the band-shaped member are overlapped with each other, the other end of the band-shaped member is in one end. When the engaging claw gets over the engaging claw, the engaging claw is housed in the slit portion. Since the slit portion is provided so as to straddle between the engagement hole and the through hole, the engagement claw can be kept housed in the slit portion in this section. As a result, the interference of the other end portion of the strip-shaped member with the engagement claw can be greatly reduced, so that the deformation of the engagement claw and the engagement hole can be reliably suppressed. By suppressing the deformation of the engagement claw and the engagement hole as described above, the engagement claw can be easily locked to the peripheral portion of the engagement hole, so that the assemblability can be improved.

上記の構成において、スリット部の幅が、係合爪の幅よりも小さいことが好ましい。このようにすれば、スリット部を設けても、係合孔の周縁部に係合爪を確実に係止させることができる。 In the above configuration, the width of the slit portion is preferably smaller than the width of the engagement claw. With this configuration, even when the slit portion is provided, the engaging claw can be reliably locked on the peripheral edge portion of the engaging hole.

上記の構成において、帯板状部材が、第二の工具爪に向かって開放された開口部を備え、スリット部が、係合孔および開口部の間に跨るように設けられていることが好ましい。このようにすれば、帯板状部材の他端部が、第二の工具爪および係合孔の間で係合爪と干渉することを緩和できる。 In the above configuration, it is preferable that the strip-shaped member includes an opening that is opened toward the second tool claw, and the slit is provided to extend between the engagement hole and the opening. . With this configuration, it is possible to reduce the interference of the other end of the strip-shaped member between the second tool claw and the engagement hole with the engagement claw.

上記の構成において、係合爪が長手方向に間隔を置いて複数設けられると共に、係合孔が長手方向に間隔を置いて複数設けられており、スリット部が、複数の係合孔のうちの長手方向に隣接する各孔の間に跨るように設けられていることが好ましい。このようにすれば、係合爪および係合孔がそれぞれ複数設けられている場合でも、帯板状部材の他端部が、各係合孔の間で各係合爪と干渉することを緩和できる。 In the above configuration, a plurality of engaging claws are provided at intervals in the longitudinal direction, a plurality of engaging holes are provided at intervals in the longitudinal direction, and the slit portion is formed of the plurality of engaging holes. It is preferably provided so as to straddle between the holes adjacent in the longitudinal direction. With this configuration, even when a plurality of engaging claws and a plurality of engaging holes are provided, the other end of the band-shaped member can be prevented from interfering with the engaging claws between the engaging holes. it can.

本発明によれば、係合爪および係合孔の変形を抑制し、組み付け性の向上を図り得るブーツバンドを提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the deformation | transformation of an engaging claw and an engaging hole is suppressed, and the boot band which can aim at the improvement of an assemblability can be provided.

ドライブシャフトの断面図である。It is sectional drawing of a drive shaft. （ａ）は第一の実施形態に係るブーツバンドを展開した状態で示す平面図、（ｂ）は（ａ）の正面図である。(A) is a top view which shows the state which expanded the boot band which concerns on 1st embodiment, (b) is a front view of (a). 図２の帯板状部材をリング状に成形して帯板状部材の一端部と他端部とを重ね合わせた締め付け後の状態の要部を拡大して示す縦断側面図である。FIG. 3 is an enlarged longitudinal sectional side view showing a main part in a state after tightening in which the band-shaped member of FIG. 2 is formed into a ring shape and one end and the other end of the band-shaped member are overlapped. （ａ）は第二の実施形態に係るブーツバンドを展開した状態で示す平面図、（ｂ）は（ａ）の正面図である。(A) is a top view which shows the state which expanded the boot band which concerns on 2nd embodiment, (b) is a front view of (a). 図４の帯板状部材をリング状に成形して帯板状部材の一端部と他端部とを重ね合わせた締め付けた後の状態の要部を拡大して示す縦断正面図である。FIG. 5 is an enlarged vertical sectional front view of a main part in a state after the band-shaped member of FIG. 4 is formed into a ring shape and one end and the other end of the band-shaped member are overlapped and fastened. （ａ）は従来のブーツバンドを展開した状態で示す平面図、（ｂ）は（ａ）の正面図である。(A) is a plan view showing a state where a conventional boot band is developed, and (b) is a front view of (a). 図６の帯板状部材をリング状に成形して帯板状部材の一端部と他端部とを重ね合わせた締め付け前の状態を示す正面図である。FIG. 7 is a front view showing a state before fastening in which the band-shaped member of FIG. 6 is formed into a ring shape and one end and the other end of the band-shaped member are overlapped. 図７の状態から第一の工具爪と第二の工具爪とを強制的に近接させることにより係合爪を係合孔に係止させた締め付け後の状態を示す正面図である。FIG. 8 is a front view showing a state after tightening in which the first and second tool claws are forcibly brought closer to each other from the state of FIG. 7 so that the engagement claws are locked in the engagement holes. 図７の帯板状部材の一端部と他端部とを重ね合わせた部分の要部を拡大して示す正面図である。It is a front view which expands and shows the principal part of the part which overlapped the one end part and the other end part of the strip-shaped member of FIG.

本発明に係るブーツバンドの実施形態を図面に基づいて説明する。以下の実施形態におけるブーツバンドを適用する等速自在継手としては、自動車のドライブシャフトに組み込まれ、駆動側と従動側の二軸を連結してその二軸が如何なる作動角をとっても等速で回転トルクを伝達する構造を備えた固定式等速自在継手および摺動式等速自在継手を例示する。 An embodiment of a boot band according to the present invention will be described with reference to the drawings. A constant velocity universal joint to which a boot band is applied in the following embodiment is incorporated in a drive shaft of an automobile, connects two shafts on a driving side and a driven side, and rotates the two shafts at a constant speed regardless of any operating angle. A fixed type constant velocity universal joint and a sliding type constant velocity universal joint having a structure for transmitting torque are exemplified.

（第一の実施形態）
図１に示すように、ドライブシャフト１は、アウトボード側（例えば車輪側）の等速自在継手２と、インボード側（例えばトランスミッション側）の等速自在継手３と、アウトボード側等速自在継手２とインボード側等速自在継手３を連結する中間シャフト４とを備えている。 (First embodiment)
As shown in FIG. 1, a drive shaft 1 includes a constant velocity universal joint 2 on an outboard side (for example, a wheel side), a constant velocity universal joint 3 on an inboard side (for example, a transmission side), and a constant velocity universal joint on an outboard side. An intermediate shaft 4 that connects the joint 2 and the inboard side constant velocity universal joint 3 is provided.

本実施形態において、アウトボード側等速自在継手２は固定式等速自在継手の一つであるツェッパ型等速自在継手であり、インボード側等速自在継手３は摺動式等速自在継手の一つであるトリポード型等速自在継手である。本実施形態では、トリポード型等速自在継手はシングルローラタイプであるが、ダブルローラタイプであってもよい。 In this embodiment, the outboard side constant velocity universal joint 2 is a Zeppa type constant velocity universal joint which is one of fixed type constant velocity universal joints, and the inboard side constant velocity universal joint 3 is a sliding type constant velocity universal joint. This is a tripod type constant velocity universal joint. In this embodiment, the tripod type constant velocity universal joint is a single roller type, but may be a double roller type.

アウトボード側等速自在継手２は、軸方向に延びる円弧状のトラック溝５が球面状内周面６の円周方向複数箇所に形成された外側継手部材７と、外側継手部材７のトラック溝５と対をなして軸方向に延びる円弧状のトラック溝８が球面状外周面９の円周方向複数箇所に形成された内側継手部材１０と、外側継手部材７のトラック溝５と内側継手部材１０のトラック溝８との間に介在してトルクを伝達するボール１１と、外側継手部材７の球面状内周面６と内側継手部材１０の球面状外周面９との間に配設されてボール１１を保持するケージ１２とを備えている。 The outboard-side constant velocity universal joint 2 includes an outer joint member 7 in which arc-shaped track grooves 5 extending in the axial direction are formed at a plurality of circumferential positions on a spherical inner peripheral surface 6, and a track groove in the outer joint member 7. 5, an inner joint member 10 in which arcuate track grooves 8 extending in the axial direction are formed at a plurality of positions in the circumferential direction of the spherical outer peripheral surface 9; The ball 11 is disposed between the ball groove 11 and the track groove 8 for transmitting torque, and is disposed between the spherical inner peripheral surface 6 of the outer joint member 7 and the spherical outer peripheral surface 9 of the inner joint member 10. And a cage 12 for holding the ball 11.

内側継手部材１０には中間シャフト４の一端がスプライン嵌合等により連結されている。 One end of the intermediate shaft 4 is connected to the inner joint member 10 by spline fitting or the like.

アウトボード側等速自在継手２は、継手内部に封入されたグリース等の潤滑剤の漏洩を防ぐと共に継手外部からの異物侵入を防止するために、外側継手部材７と中間シャフト４との間に装着されたブーツ１３を更に備えている。外側継手部材７およびブーツ１３の内部空間に潤滑剤を封入することにより、外側継手部材７に対して中間シャフト４が作動角をとりながら回転する動作時における潤滑性を確保するようにしている。 The outboard-side constant velocity universal joint 2 is provided between the outer joint member 7 and the intermediate shaft 4 in order to prevent leakage of a lubricant such as grease sealed inside the joint and to prevent foreign matter from entering the outside of the joint. A boot 13 is further provided. By lubricating the interior space of the outer joint member 7 and the boot 13 with lubrication, the lubrication during the operation of rotating the intermediate shaft 4 at an operating angle with respect to the outer joint member 7 is ensured.

ブーツ１３は大径端部１４と小径端部１５とを備えている。大径端部１４は外側継手部材７の外周面にブーツバンド１６により締め付け固定され、小径端部１５は中間シャフト４の外周面にブーツバンド１７により締め付け固定されている。これらブーツバンド１６，１７による締め付け固定でもってシール性を確保するようにしている。 The boot 13 has a large diameter end 14 and a small diameter end 15. The large-diameter end portion 14 is fixedly fastened to the outer peripheral surface of the outer joint member 7 by a boot band 16, and the small-diameter end portion 15 is fixed to the outer peripheral surface of the intermediate shaft 4 by a boot band 17. The sealing performance is ensured by tightening and fixing the boot bands 16 and 17.

ブーツ１３は、等速自在継手が作動角をとりながら回転する機能を備えていることから、その挙動に追従できる柔軟性を確保するために伸縮自在な蛇腹形状をなすゴム製または樹脂製のものが使用される。ゴム素材としては、表面硬さがＨｓ５０〜７０であるクロロプレンゴムあるいはシリコンゴム等が好適である。また、樹脂素材としては、表面硬さがＨＤ３８〜５０である熱可塑性ポリエステル系エラストマ−または熱可塑性ポリエステル系エラストマ−を含む組成物等が好適である。 The boot 13 has a function of rotating the constant-velocity universal joint while taking an operating angle, so that the boot 13 is made of a rubber or resin having an elastic bellows shape in order to secure flexibility to follow the behavior. Is used. As the rubber material, chloroprene rubber or silicon rubber having a surface hardness of Hs 50 to 70 is preferable. Further, as the resin material, a thermoplastic polyester-based elastomer having a surface hardness of HD38 to 50 or a composition containing a thermoplastic polyester-based elastomer is suitable.

ブーツバンド１６，１７は、金属製のものが使用される。 The boot bands 16 and 17 are made of metal.

インボード側等速自在継手３は、外側継手部材１８と、トリポード部材１９と、ローラユニット２０とを備えている。 The inboard-side constant velocity universal joint 3 includes an outer joint member 18, a tripod member 19, and a roller unit 20.

外側継手部材１８の内周面には、軸方向に延びる三本の直線状トラック溝２１が円周方向等間隔に形成される。各トラック溝２１は、その内側両壁に互いに対向する一対のローラ案内面２２を有する。ローラ案内面２２は円弧状断面を有し、外側継手部材１８の軸線方向に直線状に延びる。なお、図１では、三本のトラック溝２１のうち一本のみが表示されていると共に、一対のローラ案内面２２のうちの一方のみが表示されている。 On the inner peripheral surface of the outer joint member 18, three linear track grooves 21 extending in the axial direction are formed at equal intervals in the circumferential direction. Each track groove 21 has a pair of roller guide surfaces 22 facing each other on both inner walls. The roller guide surface 22 has an arc-shaped cross section and extends linearly in the axial direction of the outer joint member 18. In FIG. 1, only one of the three track grooves 21 is displayed, and only one of the pair of roller guide surfaces 22 is displayed.

トリポード部材１９は、図示は省略するが、円筒状をなすボス２３の外周面に、ボス２３の半径方向に延びる三本の脚軸２４が円周方向等間隔（１２０°間隔）で一体的に形成されたものである。脚軸２４は、その先端がトラック溝２１の底部付近まで半径方向に延在している。ボス２３の軸孔には、中間シャフト４の他端がスプライン嵌合等により連結されている。 Although not shown, the tripod member 19 has three leg shafts 24 extending in the radial direction of the boss 23 integrally formed on the outer peripheral surface of the cylindrical boss 23 at equal circumferential intervals (120 ° intervals). It was formed. The leg shaft 24 has its tip extending in the radial direction to near the bottom of the track groove 21. The other end of the intermediate shaft 4 is connected to the shaft hole of the boss 23 by spline fitting or the like.

インボード側等速自在継手３においては、トリポード部材１９の脚軸２４と外側継手部材１８のローラ案内面２２とがローラユニット２０を介して二軸の回転方向に係合することにより、駆動側から従動側へ回転トルクが等速で伝達される。また、ローラユニット２０が脚軸２４に対して回転しながらローラ案内面２２上を転動することにより、外側継手部材１８とトリポード部材１９との間の相対的な軸方向変位や角度変位が許容される。 In the inboard-side constant velocity universal joint 3, the leg shaft 24 of the tripod member 19 and the roller guide surface 22 of the outer joint member 18 are engaged with each other via the roller unit 20 in the biaxial rotation direction, so that The rotational torque is transmitted to the driven side at a constant speed. Further, since the roller unit 20 rolls on the roller guide surface 22 while rotating with respect to the leg shaft 24, relative axial displacement and angular displacement between the outer joint member 18 and the tripod member 19 are allowed. Is done.

インボード側等速自在継手３は、継手内部に封入されたグリース等の潤滑剤の漏洩を防ぐと共に継手外部からの異物侵入を防止するために、外側継手部材１８と中間シャフト４との間に装着されたブーツ２５を更に備えている。外側継手部材１８およびブーツ２５の内部空間に潤滑剤を封入することにより、外側継手部材１８に対して中間シャフト４が作動角をとりながら回転する動作時における潤滑性を確保するようにしている。 The inboard-side constant velocity universal joint 3 is provided between the outer joint member 18 and the intermediate shaft 4 in order to prevent leakage of a lubricant such as grease sealed inside the joint and to prevent foreign matter from entering from outside the joint. A boot 25 is further provided. By lubricating the interior space of the outer joint member 18 and the boot 25, lubricity during the operation of rotating the intermediate shaft 4 at an operating angle with respect to the outer joint member 18 is ensured.

ブーツ２５は、大径端部２６と小径端部２７とを備えている。大径端部２６は外側継手部材１８の外周面にブーツバンド２８により締め付け固定され、小径端部２７は中間シャフト４の外周面にブーツバンド２９により締め付け固定されている。これらブーツバンド２８，２９による締め付け固定でもってシール性を確保するようにしている。 The boot 25 has a large diameter end 26 and a small diameter end 27. The large-diameter end 26 is fixedly fastened to the outer peripheral surface of the outer joint member 18 by a boot band 28, and the small-diameter end 27 is fixed to the outer peripheral surface of the intermediate shaft 4 by a boot band 29. The tightness of the boot bands 28 and 29 secures the sealing performance.

ブーツ２５は、アウトボード側等速自在継手２のブーツ１３と同様の材質を使用することができる。また、ブーツバンド２８，２９は、アウトボード側等速自在継手２のブーツバンド１６，１７と同様の材質を使用することができる。 The same material as the boot 13 of the outboard side constant velocity universal joint 2 can be used for the boot 25. The boot bands 28 and 29 can be made of the same material as the boot bands 16 and 17 of the outboard-side constant velocity universal joint 2.

上述したアウトボード側等速自在継手２およびインボード側等速自在継手３に用いられるブーツバンド１６，１７，２８，２９は実質的に同一の構造を有するため、以下ではブーツバンド１６を例にとってその構造を詳細に説明する。 Since the boot bands 16, 17, 28, and 29 used for the above-described outboard side constant velocity universal joint 2 and the inboard side constant velocity universal joint 3 have substantially the same structure, the boot band 16 will be described below as an example. The structure will be described in detail.

図２（ａ），（ｂ）に示すように、第一の実施形態に係るブーツバンド１６は、帯板状部材３０の一端部３１にその外周面から突出する第一の工具爪３２を配設すると共に、第一の工具爪３２よりも帯板状部材３０の一端部３１の端側にその外周面から突出する二つの係合爪３３，３４を配設し、帯板状部材３０の他端部３５に係合爪３３，３４が嵌まり込む一つの係合孔３６を配設すると共に、係合孔３６よりも帯板状部材３０の他端部３５の端側にその外周面から突出する第二の工具爪３７を配設した構造を具備する。 As shown in FIGS. 2A and 2B, the boot band 16 according to the first embodiment has a first tool claw 32 protruding from an outer peripheral surface of one end 31 of a band-shaped member 30. At the same time, two engaging claws 33 and 34 projecting from the outer peripheral surface of the one end portion 31 of the band plate-shaped member 30 with respect to the first tool claw 32 are provided. The other end 35 is provided with one engagement hole 36 into which the engagement claws 33 and 34 are fitted, and the outer peripheral surface thereof is located closer to the end of the other end 35 of the band-shaped member 30 than the engagement hole 36. And a structure in which a second tool claw 37 protruding from the second member is provided.

本実施形態の場合、帯板状部材３０の一端部３１に設けられた係合爪３３，３４は、帯板状部材３０の一端部３１の他端部側を外側に向けて傾斜するように切り起こして形成されている。また、帯板状部材３０の一端部３１に設けられた第一の工具爪３２は、帯板状部材３０の切り込み部分をその厚み方向外側に向けて***させることにより、その切り込み開口部両側を跨ぐように形成されている。 In the case of the present embodiment, the engagement claws 33 and 34 provided on the one end 31 of the strip-shaped member 30 are inclined such that the other end of the one end 31 of the strip-shaped member 30 is inclined outward. It is cut and raised. The first tool claw 32 provided at one end 31 of the strip-shaped member 30 raises the cut portion of the strip-shaped member 30 outward in the thickness direction, so that both sides of the cut opening are formed. It is formed so as to straddle it.

一方、帯板状部材３０の他端部３５に設けられた第二の工具爪３７は、開口部３８の他端部側周縁部を外側に向けて***させることにより形成されている。なお、開口部３８は、第二の工具爪３７に向かって開放しており、係合孔３６よりも他端部３５の端側に設けられた貫通孔である。 On the other hand, the second tool pawl 37 provided at the other end 35 of the strip-shaped member 30 is formed by protruding the peripheral edge at the other end of the opening 38 outward. The opening 38 is a through hole that opens toward the second tool claw 37 and is provided on the end side of the other end 35 with respect to the engagement hole 36.

本実施形態では、係合孔３６と開口部３８とが帯板状部材３０の長手方向に間隔を置いて設けられると共に、係合孔３６および開口部３８の間に跨るようにスリット部３９が設けられている。つまり、スリット部３９の長手方向両端部は、係合孔３６および開口部３８のそれぞれに連通している。スリット部３９は、帯板状部材３０の幅方向中央部にその長手方向に沿って直線状に設けられている。 In the present embodiment, the engagement hole 36 and the opening 38 are provided at intervals in the longitudinal direction of the strip-shaped member 30, and the slit 39 is provided so as to extend between the engagement hole 36 and the opening 38. Is provided. That is, both ends in the longitudinal direction of the slit portion 39 communicate with the engagement hole 36 and the opening 38, respectively. The slit portion 39 is provided linearly at the center in the width direction of the strip-shaped member 30 along the longitudinal direction thereof.

係合爪３３，３４、係合孔３６、第一の工具爪３２および第二の工具爪３７は、同時にプレス加工により形成される。係合爪３３，３４は、プレス加工により帯板状部材３０の外周面に膨出するように湾曲成形されている。スリット部３９も、係合爪３３，３４、係合孔３６、第一の工具爪３２および第二の工具爪３７の形成と同時にプレス加工により形成される。スリット部３９は、プレス加工により切り込み成形されている。もちろん、加工方法はプレス加工に限定されない。 The engagement claws 33, 34, the engagement hole 36, the first tool claw 32, and the second tool claw 37 are formed simultaneously by press working. The engaging claws 33 and 34 are formed in a curved shape so as to swell on the outer peripheral surface of the strip-shaped member 30 by press working. The slit portion 39 is also formed by pressing at the same time as the formation of the engagement claws 33, 34, the engagement hole 36, the first tool claw 32, and the second tool claw 37. The slit portion 39 is cut and formed by press working. Of course, the working method is not limited to press working.

係合爪３３，３４は湾曲成形されるため、係合爪３３，３４を幅方向に見た場合に、その幅方向中央部が外側に最も突出した頂部となる。スリット部３９は、係合爪３３，３４の頂部に対応するように帯板状部材３０の幅方向中央部に設けられている。その結果、帯板状部材３０をリング状に成形してその一端部３１と他端部３５とを重ね合わせた状態で、係合爪３３，３４の頂部がスリット部３９に収容可能となっている。つまり、スリット部３９が係合爪３３，３４の頂部の逃げ部となる。 Since the engaging claws 33, 34 are formed in a curved shape, when the engaging claws 33, 34 are viewed in the width direction, the center in the width direction is the top most protruding outward. The slit portion 39 is provided at the center in the width direction of the strip-shaped member 30 so as to correspond to the tops of the engagement claws 33 and 34. As a result, the tops of the engaging claws 33 and 34 can be accommodated in the slit portion 39 in a state where the strip-shaped member 30 is formed in a ring shape and the one end 31 and the other end 35 are overlapped. I have. That is, the slit portion 39 serves as an escape portion at the top of the engaging claws 33 and 34.

ここで、係合孔３６および開口部３８の幅は、係合爪３３，３４の幅と同一かそれよりも大きい。一方、スリット部３９の幅は、係合爪３３，３４の幅よりも小さい。スリット部３９の幅は、例えば、係合爪３３，３４の幅の５０％以上８０％以下であることが好ましく、７０％以上８０％以下であることがより好ましい。本実施形態では、スリット部３９の幅は、長手方向で一定である。 Here, the width of the engagement hole 36 and the opening 38 is equal to or larger than the width of the engagement claws 33 and 34. On the other hand, the width of the slit portion 39 is smaller than the widths of the engagement claws 33 and 34. The width of the slit portion 39 is, for example, preferably 50% or more and 80% or less, more preferably 70% or more and 80% or less of the width of the engagement claws 33 and 34. In the present embodiment, the width of the slit portion 39 is constant in the longitudinal direction.

ブーツバンド１６は、図示は省略するが、帯板状部材３０をブーツ１３にリング状に巻回して帯板状部材３０の一端部３１と他端部３５とを重ね合わせた状態から、第一の工具爪３２と第二の工具爪３７とを工具で強制的に近接させることにより係合爪３４を係合孔３６の他端部側周縁部４０に係止させることでブーツ１３を締め付けて外側継手部材７および中間シャフト４に固定する。 Although illustration is omitted, the boot band 16 is formed by winding the band plate-shaped member 30 around the boot 13 in a ring shape and stacking the one end 31 and the other end 35 of the band plate member 30 from the first state. By forcibly bringing the tool claw 32 and the second tool claw 37 close to each other with a tool, the engagement claw 34 is locked to the other end side peripheral portion 40 of the engagement hole 36, thereby tightening the boot 13. It is fixed to the outer joint member 7 and the intermediate shaft 4.

なお、一つの係合孔３６に対して二つの係合爪３３，３４を設けているのは、ブーツ１３の締め付け時、一方の係合爪３３を係合孔３６の周縁部４０に係止させることにより仮固定とし、さらに、帯板状部材３０を縮径させることにより他方の係合爪３４を係合孔３６の他端部側周縁部４０に係止させることにより本固定としている。このような仮固定を必要としない場合は、一つの係合爪３４だけであってもよい。 The reason why two engaging claws 33 and 34 are provided for one engaging hole 36 is that one engaging claw 33 is locked to the peripheral portion 40 of the engaging hole 36 when the boot 13 is tightened. The temporary fixing is performed by making the belt plate-shaped member 30 smaller, and the other engaging claw 34 is locked to the peripheral edge portion 40 on the other end portion side of the engaging hole 36 by reducing the diameter of the band plate-shaped member 30. When such temporary fixing is not required, only one engaging claw 34 may be used.

以上のようにして、帯板状部材３０をリング状に成形してその一端部３１と他端部３５とを重ね合わせた状態で、帯板状部材３０の開口部３８の一端部側周縁部４１および係合孔３６の他端部側周縁部４０が係合爪３３，３４を乗り越える時、係合爪３３，３４の頂部がスリット部３９に収容された状態となる。 As described above, in a state where the band-shaped member 30 is formed into a ring shape and the one end 31 and the other end 35 are overlapped with each other, a peripheral edge at one end side of the opening 38 of the band-shaped member 30 is provided. When the edge 41 and the peripheral edge 40 on the other end of the engagement hole 36 get over the engagement claws 33, 34, the tops of the engagement claws 33, 34 are housed in the slit 39.

詳細には、スリット部３９は、係合孔３６および開口部３８の間で跨るように設けられているため、この区間で係合爪３３，３４の頂部をスリット部３９に収容し続けることができる。その結果、帯板状部材３０の他端部３５が係合爪３３，３４の頂部と干渉することを大幅に緩和できるため、係合爪３３，３４および係合孔３６の変形（例えば、係合爪３３，３４が内側に押し潰されるような変形）を確実に抑制できる。このように係合爪３３，３４および係合孔３６の変形を抑制することで、図３に示すように、係合爪３４を係合孔３６の他端部側周縁部４０に容易かつ確実に係止できるため、組み付け性の向上を図ることができる。 In detail, since the slit portion 39 is provided so as to straddle between the engagement hole 36 and the opening portion 38, the tops of the engagement claws 33, 34 can be kept housed in the slit portion 39 in this section. it can. As a result, the interference of the other end 35 of the band plate-shaped member 30 with the tops of the engaging claws 33, 34 can be greatly reduced, so that the deformation of the engaging claws 33, 34 and the engaging hole 36 (for example, Deformation in which the dowels 33 and 34 are crushed inward can be reliably suppressed. By suppressing the deformation of the engagement claws 33 and 34 and the engagement hole 36 in this manner, the engagement claw 34 is easily and reliably attached to the other end side peripheral portion 40 of the engagement hole 36 as shown in FIG. , It is possible to improve the assemblability.

スリット部３９の幅は係合爪３３，３４の幅よりも小さいため、スリット部３９を形成してもスリット部３９を除く部分に係合孔３６の他端部側周縁部４０が形成される。その結果、係合爪３３，３４を係合孔３６の他端部側周縁部４０に確実に係止することができる。 Since the width of the slit portion 39 is smaller than the widths of the engagement claws 33 and 34, the other end side peripheral edge portion 40 of the engagement hole 36 is formed in a portion other than the slit portion 39 even if the slit portion 39 is formed. . As a result, the engagement claws 33 and 34 can be securely locked to the other end side peripheral edge 40 of the engagement hole 36.

なお、係合孔３６および開口部３８の幅は、係合爪３３，３４の幅と同一かそれよりも大きいため、係合孔３６および開口部３８では、係合爪３３，３４が内側に押し潰されることはない。 Since the widths of the engagement holes 36 and the openings 38 are equal to or larger than the widths of the engagement claws 33, 34, the engagement claws 33, 34 are It will not be crushed.

図２（ａ）に示すように、帯板状部材３０の一端部３１の長手方向両側、つまり、係合爪３４から第一の工具爪３２に亘る部位の両側に、帯板状部材３０の長手方向に延びるリブ４２を設けている。なお、第一の工具爪３２と係合爪３４との間で帯板状部材３０の幅方向中央部にもリブ４３を設けている。このリブ４２，４３は、帯板状部材３０の内周面をプレス加工により突出させることにより形成される。 As shown in FIG. 2A, the band plate-shaped member 30 is provided on both sides in the longitudinal direction of the one end portion 31 of the band plate-shaped member 30, that is, on both sides of a portion extending from the engaging claw 34 to the first tool claw 32. A rib 42 extending in the longitudinal direction is provided. A rib 43 is also provided between the first tool claw 32 and the engagement claw 34 at the center in the width direction of the band-shaped member 30. The ribs 42 and 43 are formed by projecting the inner peripheral surface of the strip-shaped member 30 by pressing.

このようなリブ４２，４３を設けたことにより、帯板状部材３０をリング状に成形して帯板状部材３０の一端部３１と他端部３５とを重ね合わせた状態から、帯板状部材３０の他端部３５が係合爪３３，３４を乗り越える時、リブ４２，４３により帯板状部材３０の一端部３１を補強することができ、他端部３５が係合爪３３、３４を乗り越える力に打ち勝ち、この部分の座屈を防止できる。 By providing such ribs 42 and 43, the band plate-shaped member 30 is formed into a ring shape and the one end 31 and the other end 35 of the band plate-shaped member 30 are overlapped with each other. When the other end 35 of the member 30 gets over the engaging claws 33, 34, the one end 31 of the strip-shaped member 30 can be reinforced by the ribs 42, 43, and the other end 35 becomes the engaging claws 33, 34. Overcoming the force to overcome the buckling and preventing buckling of this part.

なお、係合爪３３，３４の硬さをＨＶ２００〜ＨＶ２５０とすることにより、係合爪３３，３４の硬さを上げることで、帯板状部材３０の一端部３１がその外側に位置する他端部３５により内側に押し潰されることを抑制することもできる。 In addition, by setting the hardness of the engaging claws 33 and 34 to HV200 to HV250, and increasing the hardness of the engaging claws 33 and 34, the one end 31 of the strip-shaped member 30 is positioned outside the other. It is also possible to prevent the end portion 35 from being crushed inward.

（第二の実施形態）
図４（ａ），（ｂ）に示すように、第二の実施形態に係るブーツバンド１６が、第一の実施形態に係るブーツバンドと相違する点は、係合孔およびスリット部の構成である。以下では、これら相違する構成について説明し、それ以外の共通する構成については同一符号を付して重複説明は省略する。 (Second embodiment)
As shown in FIGS. 4A and 4B, the boot band 16 according to the second embodiment differs from the boot band according to the first embodiment in the configuration of the engagement hole and the slit. is there. In the following, these different configurations will be described, and the other common configurations will be assigned the same reference numerals, and redundant description will be omitted.

この実施形態では、ブーツバンド１６は、二つの係合爪３３，３４に対して二つの係合孔５０，５１を備えている。二つの係合孔５０，５１は、帯板状部材３０の長手方向に間隔を置いて設けられている。つまり、帯板状部材３０の他端部３５の端から順に、開口部３８、係合孔５１、係合孔５０の三つが長手方向に間隔を置いて設けられている。開口部３８は係合孔５１よりも他端部３５の端側に設けられた貫通孔であり、係合孔５１は係合孔５０よりも他端部３５の端側に設けられた貫通孔である。なお、係合爪および係合孔は、三つ以上設けられていてもよい。 In this embodiment, the boot band 16 has two engaging holes 50 and 51 for the two engaging claws 33 and 34. The two engagement holes 50 and 51 are provided at intervals in the longitudinal direction of the strip-shaped member 30. That is, the opening 38, the engaging hole 51, and the engaging hole 50 are provided at intervals in the longitudinal direction in order from the end of the other end 35 of the band-shaped member 30. The opening 38 is a through hole provided closer to the end of the other end 35 than the engaging hole 51. The engaging hole 51 is a through hole provided closer to the end of the other end 35 than the engaging hole 50. It is. Note that three or more engagement claws and engagement holes may be provided.

係合孔５１および開口部３８の間には、両者に跨るようにスリット部５２が設けられている。また、係合孔５０および係合孔５１の間には、両者に跨るようにスリット部５３が設けられている。 A slit 52 is provided between the engagement hole 51 and the opening 38 so as to straddle both. Further, a slit 53 is provided between the engagement hole 50 and the engagement hole 51 so as to straddle both.

スリット部５２，５３の幅は、係合爪３３，３４の幅よりも小さい。 The width of the slits 52, 53 is smaller than the width of the engagement claws 33, 34.

このようにすれば、帯板状部材３０をリング状に成形してその一端部３１と他端部３５とを重ね合わせた状態で、帯板状部材３０の開口部３８の一端部側周縁部４１、係合孔５１の他端部側周縁部５４、係合孔５１の一端部側周縁部５５および係合孔５０の他端部側周縁部５６が係合爪３３を乗り越える時、係合爪３３の頂部がスリット部５２，５３に収容された状態となる。同様に、帯板状部材３０をリング状に成形してその一端部３１と他端部３５とを重ね合わせた状態で、帯板状部材３０の開口部３８の一端部側周縁部４１、係合孔５１の他端部側周縁部５４が係合爪３４を乗り越える時、係合爪３４の頂部がスリット部５２に収容された状態となる。 With this configuration, the band plate-shaped member 30 is formed into a ring shape, and the one end 31 and the other end 35 are overlapped with each other. 41, the other end side peripheral edge portion 54 of the engagement hole 51, the one end side peripheral edge portion 55 of the engagement hole 51, and the other end side peripheral edge portion 56 of the engagement hole 50 The tops of the claws 33 are housed in the slits 52 and 53. Similarly, in a state where the band-shaped member 30 is formed in a ring shape and one end 31 and the other end 35 are overlapped with each other, one end side peripheral edge 41 of the opening 38 of the band-shaped member 30 is engaged. When the other end side peripheral portion 54 of the mating hole 51 gets over the engagement claw 34, the top of the engagement claw 34 is housed in the slit portion 52.

詳細には、スリット部５２は、係合孔５１と開口部３８との間に跨るように設けられているため、この区間で係合爪３３，３４の頂部をスリット部５２，５３に収容し続けることができる。また、スリット部５３は、係合孔５０と係合孔５１との間に跨るように設けられているため、この区間で係合爪３３の頂部をスリット部５３に収容し続けることができる。その結果、帯板状部材３０の他端部３５が係合爪３３，３４の頂部と干渉することを大幅に緩和できるため、係合爪３３，３４および係合孔５０，５１の変形を確実に抑制できる。このように、係合爪３３，３４および係合孔５０，５１の変形を抑制することで、図５に示すように、係合爪３３，３４を係合孔５０，５１の他端部側周縁部５４，５６に容易かつ確実に係止できるため、組み付け性の向上を図ることができる。 Specifically, since the slit 52 is provided so as to straddle between the engagement hole 51 and the opening 38, the tops of the engagement claws 33, 34 are accommodated in the slits 52, 53 in this section. You can continue. Further, since the slit portion 53 is provided so as to straddle between the engagement hole 50 and the engagement hole 51, the top of the engagement claw 33 can be kept housed in the slit portion 53 in this section. As a result, the interference of the other end 35 of the strip-shaped member 30 with the tops of the engagement claws 33, 34 can be greatly reduced, so that the deformation of the engagement claws 33, 34 and the engagement holes 50, 51 can be ensured. Can be suppressed. In this way, by suppressing the deformation of the engaging claws 33, 34 and the engaging holes 50, 51, the engaging claws 33, 34 are moved to the other end side of the engaging holes 50, 51 as shown in FIG. Since it can be easily and reliably locked to the peripheral edges 54 and 56, the assemblability can be improved.

なお、スリット部５２，５３のうち、いずれか一方を省略してもよい。 Note that one of the slits 52 and 53 may be omitted.

本発明は前述した実施形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。 The present invention is not limited to the above-described embodiment at all, and it is needless to say that the present invention can be carried out in various other forms without departing from the gist of the present invention. It is indicated by the appended claims, and includes equivalents described in the claims, and all modifications within the scope.

上記の実施形態では、第二の工具爪に対応する位置に設けられた開口部と、係合孔との間にスリット部を設ける場合を説明したが、開口部と係合孔とが大きく離反している場合には、開口部と係合孔との間に貫通孔を別途設け、その貫通孔と係合孔との間に跨るようにスリット部を設けてもよい。この場合、貫通孔の幅は、係合爪の幅と同一かそれよりも大きいことが好ましい。 In the above embodiment, the case where the slit is provided between the opening provided at the position corresponding to the second tool claw and the engagement hole has been described, but the opening and the engagement hole are largely separated from each other. In this case, a through-hole may be separately provided between the opening and the engaging hole, and a slit may be provided to extend between the through-hole and the engaging hole. In this case, the width of the through hole is preferably equal to or larger than the width of the engaging claw.

上記の実施形態では、固定式等速自在継手としてツェッパ型等速自在継手を例示したが、本発明に係るブーツバンドは、アンダーカットフリー型等速自在継手などの他の固定式等速自在継手にも適用できる。また、上記の実施形態では、摺動式等速自在継手としてトリポード型等速自在継手を例示したが、本発明に係るブーツバンドは、ダブルオフセット型等速自在継手、クロスグルーブ型等速自在継手などの他の摺動式等速自在継手にも適用できる。 In the above-described embodiment, the Zeppa type constant velocity universal joint has been exemplified as the fixed type constant velocity universal joint. However, the boot band according to the present invention may be another fixed type constant velocity universal joint such as an undercut free type constant velocity universal joint. Also applicable to Further, in the above embodiment, the tripod type constant velocity universal joint is exemplified as the sliding type constant velocity universal joint. However, the boot band according to the present invention is a double offset type constant velocity universal joint, a cross groove type constant velocity universal joint. And other sliding type constant velocity universal joints.

上記の実施形態では、ドライブシャフトに組み込まれる等速自在継手を例示したが、本発明に係るブーツバンドは、プロペラシャフトに組み込まれる等速自在継手にも適用できる。 In the above embodiment, the constant velocity universal joint incorporated in the drive shaft has been illustrated, but the boot band according to the present invention can also be applied to a constant velocity universal joint incorporated in a propeller shaft.

１６，１７，２８，２９ブーツバンド
３０帯板状部材
３２第一の工具爪
３３，３４係合爪
３６係合孔
３７第二の工具爪
３８開口部
３９スリット部
５０，５１係合孔
５２，５３スリット部 16, 17, 28, 29 Boot band 30 Strip plate member 32 First tool claw 33, 34 Engagement claw 36 Engagement hole 37 Second tool claw 38 Opening 39 Slit portion 50, 51 Engagement hole 52, 53 slit

Claims

帯板状部材と、前記帯板状部材の一端部に設けられその外周面から突出する第一の工具爪と、前記第一の工具爪よりも前記一端部の端側に設けられその外周面から突出する係合爪と、前記帯板状部材の他端部に設けられ前記係合爪が嵌まり込む係合孔と、前記係合孔よりも前記他端部の端側に設けられその外周面から突出する第二の工具爪とを備え、前記帯板状部材をブーツの外周にリング状に巻回して前記一端部と前記他端部とを前記一端部が内側となるように重ね合わせ、前記第一の工具爪と前記第二の工具爪とを近接させて前記係合孔の周縁部に前記係合爪を係止させることにより前記ブーツを締め付けるブーツバンドであって、
前記帯板状部材が、前記係合孔よりも前記他端部の端側に設けられた貫通孔と、前記係合孔および前記貫通孔の間に跨るように設けられたスリット部とを備えていることを特徴とするブーツバンド。 A band-shaped member, a first tool claw provided at one end of the band-shaped member and protruding from an outer peripheral surface thereof, and an outer peripheral surface provided at an end side of the one end with respect to the first tool claw An engagement claw projecting from the other end, an engagement hole provided at the other end of the strip-shaped member, into which the engagement claw fits, and an engagement claw provided at an end of the other end relative to the engagement hole. A second tool claw protruding from an outer peripheral surface, the band-shaped member is wound around the boot in a ring shape, and the one end and the other end are overlapped so that the one end is inside. A boot band that tightens the boot by bringing the first tool claw and the second tool claw close to each other and locking the engagement claw to a peripheral portion of the engagement hole;
The band-shaped member includes a through-hole provided closer to the end of the other end than the engagement hole, and a slit provided so as to straddle between the engagement hole and the through-hole. A boot band characterized by being.

前記スリット部の幅が、前記係合爪の幅よりも小さいことを特徴とする請求項１に記載のブーツバンド。 The boot band according to claim 1, wherein a width of the slit portion is smaller than a width of the engaging claw.

前記帯板状部材が、前記第二の工具爪に向かって開放された開口部を備え、
前記スリット部が、前記係合孔および前記開口部の間に跨るように設けられていることを特徴とする請求項１又は２に記載のブーツバンド。 The strip-shaped member includes an opening that is opened toward the second tool claw,
The boot band according to claim 1, wherein the slit portion is provided so as to straddle between the engagement hole and the opening.

前記係合爪が長手方向に間隔を置いて複数設けられると共に、前記係合孔が長手方向に間隔を置いて複数設けられており、
前記スリット部が、複数の前記係合孔のうちの長手方向に隣接する各孔の間に跨るように設けられていることを特徴とする請求項１〜３のいずれか１項に記載のブーツバンド。
A plurality of the engagement claws are provided at intervals in the longitudinal direction, and a plurality of the engagement holes are provided at intervals in the longitudinal direction,
The boot according to any one of claims 1 to 3, wherein the slit portion is provided so as to straddle between adjacent holes in the longitudinal direction among the plurality of engagement holes. band.