JP2001140849A - Drive shaft - Google Patents
Drive shaftInfo
- Publication number
- JP2001140849A JP2001140849A JP32694499A JP32694499A JP2001140849A JP 2001140849 A JP2001140849 A JP 2001140849A JP 32694499 A JP32694499 A JP 32694499A JP 32694499 A JP32694499 A JP 32694499A JP 2001140849 A JP2001140849 A JP 2001140849A
- Authority
- JP
- Japan
- Prior art keywords
- boot
- joint
- drive shaft
- pair
- flexible
- 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
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 24
- 239000005060 rubber Substances 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000000465 moulding Methods 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 4
- 229920003244 diene elastomer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920006345 thermoplastic polyamide Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Motor Power Transmission Devices (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は自動車等の車両に
用いられるドライブシャフトに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive shaft used for a vehicle such as an automobile.
【０００２】[0002]
【従来の技術】一対の等速自在継手とその間を連結する
中間軸とからなるドライブシャフトにブーツを装着する
場合に、各継手部を個別の可撓性ブーツによりカバーす
ることが知られている。この場合の可撓性ブーツは跳ね
石等に対する耐久性の観点から通常ＣＲ（クロロプレ
ン）ゴムが用いられ、その一端部を継手部の外輪外周面
に、また他端部を中間軸外周面にそれぞれブーツバンド
で締結して固定することが行われる。2. Description of the Related Art When a boot is mounted on a drive shaft composed of a pair of constant velocity universal joints and an intermediate shaft connecting between the joints, it is known that each joint is covered by an individual flexible boot. . The flexible boot in this case is usually made of CR (chloroprene) rubber from the viewpoint of durability against hopping stones and the like, and one end thereof is provided on the outer peripheral surface of the outer ring of the joint and the other end is provided on the outer peripheral surface of the intermediate shaft. Fastening and fixing with a boot band is performed.
【０００３】また、一対の蛇腹状の可撓部とその間を連
結する円筒状のストレート部とをＣＲゴムにより一体成
形したブーツにより、一対の継手部と中間軸をカバーす
るようにしたドライブシャフトも知られている（実公平
２−２７６９５号公報等）。There is also a drive shaft in which a pair of joints and an intermediate shaft are covered by a boot in which a pair of bellows-like flexible portions and a cylindrical straight portion connecting between them are integrally formed of CR rubber. It is known (Japanese Utility Model Publication No. 2-27695).
【０００４】上記のように、一対の可撓部とその間を連
結する円筒状のストレート部を一体成形してなる一体成
形型のブーツは、各可撓部の先端部を各継手部の外輪外
周面にブーツバンドにより締結することにより固定され
るが、中間軸には締結されない。このため、各継手部を
個別の可撓性ブーツによりカバーする前記のブーツに比
べ、部品点数や組立工数が減少する利点があると共に、
継手部が角度をとったり、プランジングした場合の発熱
による内圧変動や部分変形に対して一体に対応するた
め、局部的な負荷が減りブーツの耐久性が向上する等の
利点がある。[0004] As described above, in an integrally molded boot made by integrally molding a pair of flexible portions and a cylindrical straight portion connecting between the pair of flexible portions, the tip of each flexible portion is formed by the outer periphery of the outer ring of each joint. It is fixed by being fastened to the surface by a boot band, but is not fastened to the intermediate shaft. For this reason, compared with the above-mentioned boots in which each joint portion is covered by an individual flexible boot, there is an advantage that the number of parts and the number of assembly steps are reduced, and
Since the joint portion integrally responds to internal pressure fluctuations and partial deformation due to heat generated when the joint portion is angled or plunged, there is an advantage that the local load is reduced and the durability of the boot is improved.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記の一体成
形型のブーツは、その材質がＣＲゴムであり射出成形で
しか成形することが出来ない。そのために複雑な構造の
金型が必要になると共に、複数の山形ひだでなる可撓部
の成形時の脱型が困難であるため、サイクルタイムが長
くなる等の問題があった。また、上記のＣＲゴムは、継
手外輪に装着する際に金属製ブーツバンドが必要にな
り、部品点数の増加をもたらすと共に、継手外径が大き
くなる要因ともなっていた。However, the above-mentioned integrally molded boot is made of CR rubber and can be formed only by injection molding. For this reason, a mold having a complicated structure is required, and it is difficult to remove a flexible portion composed of a plurality of chevron folds at the time of molding. Further, the above-mentioned CR rubber requires a metal boot band when it is mounted on the outer ring of the joint, resulting in an increase in the number of components and an increase in the outer diameter of the joint.
【０００６】そこで、この発明は、上記のような一体成
形型のブーツを装着してなるドライブシャフトにおい
て、ブーツに関する上記のごとき問題を解決することを
課題とする。Accordingly, an object of the present invention is to solve the above-mentioned problems relating to boots in a drive shaft equipped with the above-described integrally molded boots.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明は、一対の継手部とその継手部間を連結
する中間軸とからなる軸部と、上記一対の継手部を覆う
可撓部と上記中間軸を覆うストレート部とを一体成形し
たブーツとからなるドライブシャフトにおいて、上記ブ
ーツを熱可塑性エラストマー（以下，ＴＰＥと称す
る。）若しくは熱可塑性エラストマー（以下、ＴＰＥ組
成物と称する。）を含む組成物により形成する構成とし
たものであり、上記のブーツは一体ブロー成形により効
率良く成形される。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention covers a shaft portion including a pair of joints and an intermediate shaft connecting the joints, and covers the pair of joints. In a drive shaft comprising a boot in which a flexible portion and a straight portion covering the intermediate shaft are integrally formed, the boot is made of a thermoplastic elastomer (hereinafter, referred to as TPE) or a thermoplastic elastomer (hereinafter, referred to as TPE composition). )), And the boot is formed efficiently by integral blow molding.
【０００８】上記のＴＰＥとしては、ポリスチレン系、
ポリオレフィン系、塩化ビニル系、ポリウレタン系、ポ
リエステル系、ポリアミド系、塩素化ポリエチレン系、
ポリジエン系、フッ素系、トランスポリイソプレン等が
挙げられる。As the above TPE, polystyrene,
Polyolefin, vinyl chloride, polyurethane, polyester, polyamide, chlorinated polyethylene,
Polydiene-based, fluorine-based, and trans-polyisoprene are exemplified.
【０００９】また、上記のＴＰＥ２０〜９９重量％に、
ゴム８０〜１重量％を配合してなる柔軟性を有するＴＰ
Ｅ組成物を本発明に用いることができる。上記のゴム成
分としては、各種の合成ゴム又は天然ゴムを単独又は組
み合わせで使用することができる。[0009] In addition, the above TPE 20-99% by weight,
Flexible TP containing 80-1% by weight of rubber
E compositions can be used in the present invention. As the rubber component, various synthetic rubbers or natural rubbers can be used alone or in combination.
【００１０】好ましいゴムとしては、極性ジエン系ゴム
及びその水素添加物、アクリルゴム、ホドリンゴム、ウ
レタンゴム、クロロフォスファゼンゴム及び熱可塑性ポ
リウレタンエラストマー、熱可塑性ポリアミドエラスト
マーなどが挙げられる。更に、シリコーンゴム及びフッ
素ゴムも、耐油性があるために、前記のゴムとして好ま
しく使用できる。Preferred rubbers include polar diene rubbers and hydrogenated products thereof, acrylic rubbers, hydrin rubbers, urethane rubbers, chlorophosphazene rubbers, thermoplastic polyurethane elastomers, thermoplastic polyamide elastomers and the like. Furthermore, silicone rubber and fluorine rubber can also be preferably used as the rubber because of their oil resistance.
【００１１】この発明で使用できる特に好ましいゴム
は、非ハロゲンジエン系ゴム、非ハロゲンジエン系ゴム
の水素添加物、エピクロルヒドリングゴムなどであり、
更に具体的には、アクリロニトル−ブタジエン共重合ゴ
ム、水素化アクリロニトル−ブタジエン共重合ゴム、水
素化アクリル酸エステル−ブタジエン共重合ゴム、エチ
レン−プロピレン共重合ゴムなどである。Particularly preferred rubbers that can be used in the present invention are non-halogen diene rubbers, hydrogenated non-halogen diene rubbers, epichlorohydring rubber, and the like.
More specifically, it includes acrylonitrile-butadiene copolymer rubber, hydrogenated acrylonitrile-butadiene copolymer rubber, hydrogenated acrylate-butadiene copolymer rubber, ethylene-propylene copolymer rubber, and the like.
【００１２】その他、上記各継手部の外輪外径面に環状
のブーツ溝を形成し、上記可撓部の端部内径面に形成し
た突条を上記ブーツ溝に係合せしめ、溶着接合により両
者を固着した構成、上記溶着接合による固着部の外径面
に金属製のブーツバンドを巻回した構成、上記可撓部
が、上記継手部の外輪の外周面の全面を覆う構成、上記
中間軸が中空である構成、上記ストレート部が上記中間
軸の外径面に摺動自在に嵌挿された構成、上記の各継手
部が等速自在継手である構成などを採ることができる。In addition, an annular boot groove is formed on the outer diameter surface of the outer race of each of the joint portions, and a ridge formed on the inner diameter surface of the end portion of the flexible portion is engaged with the boot groove, and both are joined by welding. A structure in which a metal boot band is wound around an outer diameter surface of a fixing portion formed by welding, a structure in which the flexible portion covers the entire outer peripheral surface of an outer ring of the joint portion, and a structure in which the intermediate shaft is used. Is hollow, the straight portion is slidably fitted on the outer diameter surface of the intermediate shaft, and the joints are constant velocity universal joints.
【００１３】[0013]
【発明の実施の形態】図１に示した第１実施形態のドラ
イブシャフトは、左右一対の継手部１、１’と、これら
の内輪２、２’間を連結する中間軸３とからなる軸部４
と、各継手部１、１’の外輪５、５’と中間軸部３をカ
バーするブーツ６とにより構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A drive shaft according to a first embodiment shown in FIG. 1 has a shaft comprising a pair of right and left joints 1, 1 'and an intermediate shaft 3 connecting these inner rings 2, 2'. Part 4
And the outer rings 5 and 5 ′ of the joints 1 and 1 ′ and the boot 6 covering the intermediate shaft 3.
【００１４】上記の軸部４を構成する一方の継手１はベ
ル型等速自在継手であり、他方の継手１’はダブルオフ
セット型等速自在継手である。これらの外輪５、５’に
はそれぞれ継手軸部７、７’が一体に設けられる。各内
輪２、２’間を連結する前記の中間軸３は中実、中空の
いずれの場合もある。One of the joints 1 constituting the shaft portion 4 is a bell-shaped constant velocity universal joint, and the other joint 1 'is a double offset type constant velocity universal joint. These outer races 5, 5 'are integrally provided with joint shafts 7, 7', respectively. The intermediate shaft 3 connecting the inner rings 2, 2 'may be either solid or hollow.
【００１５】上記のブーツ６は、ＴＰＥ若しくはＴＰＥ
組成物により各継手部１、１’を覆う蛇腹状の可撓部
８、８’と、中間軸３を覆う円筒状のストレート部９と
を一体成形したものである。The boot 6 is made of TPE or TPE
A bellows-shaped flexible portion 8, 8 'covering each joint portion 1, 1' and a cylindrical straight portion 9 covering the intermediate shaft 3 are integrally formed of a composition.
【００１６】ＴＰＥ組成物は、ＴＰＥにゴムを配合した
ものであり、その配合割合はＴＰＥ成分が９９〜２０重
量％、ゴム成分が１〜８０重量％であり、好ましくは前
者が９５〜５１重量％、後者が５〜４９重量％であり、
更に好ましくは前者が８５％〜５１重量％、後者が１５
〜４９重量％である。The TPE composition is obtained by compounding rubber with TPE. The compounding ratio is such that the TPE component is 99 to 20% by weight and the rubber component is 1 to 80% by weight, preferably the former is 95 to 51% by weight. %, The latter being 5 to 49% by weight,
More preferably, the former is 85% to 51% by weight, and the latter is 15% by weight.
~ 49% by weight.
【００１７】ＴＰＥ成分の使用量が多すぎると結果的に
ゴム成分の使用量が不足し、得られるＴＰＥ組成物の柔
軟性と圧縮永久歪みの向上効果が十分認められない。十
分な効果を期待するためには、ＴＰＥ成分が９５重量％
以下であることが好ましい。また、ＴＰＥ成分の使用量
が２０％重量未満では、得られるＴＰＥ組成物の加工性
と流動性が劣り、ブーツ材料として好ましくない。If the amount of the TPE component is too large, the amount of the rubber component used as a result becomes insufficient, and the effect of improving the flexibility and compression set of the obtained TPE composition is not sufficiently recognized. In order to expect a sufficient effect, the TPE component must be 95% by weight.
The following is preferred. On the other hand, if the amount of the TPE component is less than 20% by weight, the resulting TPE composition is inferior in processability and fluidity, which is not preferable as a boot material.
【００１８】上記のＴＰＥ組成物は、ＴＰＥとゴムを単
純にブレンドするだけでも得ることができるが、より高
い性能の組成物を得るために動的架橋を施してもよい。The above TPE composition can be obtained by simply blending TPE and rubber, but may be subjected to dynamic crosslinking in order to obtain a composition having higher performance.
【００１９】上記のブーツの硬度はＪＩＳ Ａ型スプリ
ング硬度計で４５〜９９Ｈｓに設定される。４５Ｈｓ未
満であると、回転膨張量が大きく、３００r ／min . 程
度で異常変形を起こし、９９Ｈｓを越えると高角度時、
可撓部８、８’が逆に変形しにくく、破損又は大径部の
シール性が悪化する。望ましくは、５５〜９５Ｈｓ，さ
らに望ましくは６０〜８０Ｈｓに設定する。The hardness of the boot is set at 45 to 99 Hs by a JIS A type spring hardness tester. If it is less than 45 Hs, the amount of rotational expansion is large, causing abnormal deformation at about 300 r / min.
On the contrary, the flexible portions 8, 8 'are unlikely to be deformed, and are damaged or the sealing performance of the large diameter portion is deteriorated. Preferably, it is set to 55 to 95 Hs, more preferably 60 to 80 Hs.
【００２０】また、各可撓部８、８’のひだを形成する
山の数は、２〜１０山に設定される。２山未満である
と、高角度時のひだ長の確保が難しく、仮に確保し得て
も山径が非常に大きくなり、谷部にかかる応力や回転時
の山の振れが増大し、破損を生じることがある。１０山
を越えると、逆に山径と谷径の差が小さくなり、ブーツ
自体の剛性がなくなり、回転時、膨張による異常変形を
起こす。望ましくは３〜８山に設定する。The number of peaks forming the folds of each of the flexible portions 8 and 8 'is set to 2 to 10 peaks. If it is less than two peaks, it is difficult to secure the pleat length at a high angle, and even if it can be secured, the peak diameter will be very large, the stress applied to the valley and the runout of the peak during rotation will increase, and damage will occur. May occur. On the other hand, when the number of peaks exceeds 10, the difference between the peak diameter and the valley diameter becomes small, the rigidity of the boot itself is lost, and abnormal deformation due to expansion occurs during rotation. Preferably, the number is set to 3 to 8 peaks.
【００２１】なお、可撓部８、８’とストレート部９の
肉厚比は１：３に設定することが望ましい。また、ブー
ツ６の形状は左右対称、非対称形状のいずれでもよい。It is desirable that the thickness ratio between the flexible portions 8, 8 'and the straight portion 9 is set to 1: 3. The shape of the boot 6 may be either symmetrical or asymmetrical.
【００２２】上記のＴＰＥ組成物により一体成形された
各可撓部８、８’の大径側端部に筒状の取付け部１０、
１０’が設けられ、これらの取付け部１０、１０’はそ
れぞれ継手部１、１’の外輪５、５’の外周面の全面を
覆う。At the large-diameter end of each of the flexible portions 8, 8 'integrally formed from the TPE composition, a cylindrical mounting portion 10,
10 'is provided, and these mounting portions 10, 10' cover the entire outer peripheral surfaces of the outer rings 5, 5 'of the joint portions 1, 1', respectively.
【００２３】上記の各取付け部１０、１０’により外輪
５、５’の外周面の全面を覆い、かつ、中間軸３をスト
レート部９で覆うことにより、防錆のために外輪５、
５’や中間軸３の外周面に施していた塗装が不要にな
る。By covering the entire outer peripheral surfaces of the outer races 5, 5 'with the above-mentioned mounting portions 10, 10' and covering the intermediate shaft 3 with the straight portion 9, the outer race 5, 5 '
The coating applied to the outer peripheral surface of 5 ′ and the intermediate shaft 3 becomes unnecessary.
【００２４】上記の各外輪５、５’の外径面には環状の
ブーツ溝１１、１１’が形成され（図２参照）、これら
のブーツ溝１１、１１’に合致する突条１２、１２’が
ブーツ６の各取付け部１０、１０’の端部内径面に形成
される。これらの突条１２、１２’が各ブーツ溝１１、
１１’に係合され、加熱による溶着接合により各突条１
２、１２’が各ブーツ溝１１、１１’に固着される。Annular boot grooves 11, 11 'are formed on the outer diameter surface of each of the outer races 5, 5' (see FIG. 2), and the ridges 12, 12 conform to these boot grooves 11, 11 '. 'Is formed on the inner diameter surface of the end of each of the mounting portions 10 and 10' of the boot 6. These ridges 12 and 12 ′ are
11 ′, and each ridge 1 is welded by heating.
2, 12 'are fixed to each boot groove 11, 11'.
【００２５】上記の固着部の外径面に金属製の簡易型の
ブーツバンド１３、１３’を巻回すれば、取付け部１
０、１０’と外輪５、５’との固定性、シール性が一層
確実となる。When the simple boot bands 13 and 13 'made of metal are wound around the outer diameter surface of the fixing portion, the mounting portion 1
0, 10 'and the outer rings 5, 5' can be more securely fixed and sealed.
【００２６】上記の可撓部８、８’の取付け部１０、１
０’を外輪５、５’に固定するその他の手段として、取
付け部１０、１０’の外径面に通常のΩバンドを締結す
る従来の手段をとることができる。Attachment portions 10, 1 of flexible portions 8, 8 'described above.
As another means for fixing 0 'to the outer races 5, 5', a conventional means for fastening a normal Ω band to the outer diameter surfaces of the mounting portions 10, 10 'can be used.
【００２７】更に、ブーツ材料が熱可塑性であるため、
外輪５、５’を電磁誘導加熱法により加熱しながら取付
け部１０、１０’に適切な圧縮力を加えることで再溶融
させ、取付け部１０、１０’を外輪５、５’の形状に再
賦型させると共に溶着接合により固着される。この場
合、金属（鉄など）の粉末を混ぜた磁性シート状接着剤
を、取付け部１０、１０’と外輪５、５’の界面に介在
させながら電磁誘導加熱してもよい。更に、前述と同様
に、固着部の外径面に金属製の簡易型のブーツバンド１
３、１３’を巻回すれば、取付け部１０、１０’と外輪
５、５’との固定性、シール性が一層確実となる。Further, since the boot material is thermoplastic,
The outer rings 5, 5 'are re-melted by applying an appropriate compressive force to the mounting portions 10, 10' while being heated by the electromagnetic induction heating method, and the mounting portions 10, 10 'are re-formed into the shapes of the outer rings 5, 5'. It is molded and fixed by welding. In this case, a magnetic sheet-like adhesive mixed with a powder of a metal (eg, iron) may be subjected to electromagnetic induction heating while being interposed at the interface between the mounting portions 10, 10 ′ and the outer rings 5, 5 ′. Further, as described above, a simple boot band 1 made of metal is provided on the outer diameter surface of the fixing portion.
By winding 3, 13 ', the fixing property and the sealing property between the mounting portions 10, 10' and the outer races 5, 5 'are further ensured.
【００２８】前記のストレート部９の内径は、中間軸３
の外径とほぼ同径（±１ｍｍ程度の差を許容範囲とす
る。）に形成する。これにより、両者の間において通気
性と摺動の自在性が確保される。The inner diameter of the straight portion 9 is
Of the same diameter (a difference of about ± 1 mm is an allowable range). Thereby, air permeability and slidability are secured between the two.
【００２９】これ以上締代が大きいと、組立性が低下す
るだけでなく、等速自在継手が角度をとったり、プラン
ジングした場合に、発熱、内圧吸収、変形等が両可撓部
８、８’で一体に対応することが困難となる。逆に、す
きまが大きくなると、グリースが低位側の継手部１、
１’に移動し、戻ることがない。特に、ＡＴＶ（ALL TE
RRAIN VEHICLE)における等速自在継手のように、取付け
角度の大きい場合ではグリースの移動が顕著であり、高
位の継手部１、１’の潤滑不良を来す。If the interference is larger than this, not only does the assemblability deteriorate, but also when the constant velocity universal joint is angled or plunged, heat generation, internal pressure absorption, deformation, etc. are reduced by both flexible portions 8, 8. 'Makes it difficult to respond together. Conversely, if the clearance is large, the grease will be
Move to 1 'and never return. In particular, ATV (ALL TE
As in the case of a constant velocity universal joint in (RRAIN VEHICLE), when the mounting angle is large, the movement of the grease is remarkable, resulting in poor lubrication of the high-order joints 1, 1 '.
【００３０】次に、図３に示した第２実施形態は、各可
撓部８、８’の取付け部１０、１０’が前述のものより
短く形成され、それぞれ各外輪５、５’の開口側端部の
外径面に溶着接合により固着したものである。その他の
構成は前述の場合と同じであるので、同一部分には同一
符号を付して示すにとどめ、重複した説明を省略する。Next, in the second embodiment shown in FIG. 3, the mounting portions 10, 10 'of the flexible portions 8, 8' are formed shorter than those described above, and the openings of the outer races 5, 5 'are respectively formed. It is fixed to the outer diameter surface of the side end by welding. Other configurations are the same as in the above-described case, and therefore, the same portions are denoted by the same reference numerals, and duplicate description will be omitted.
【００３１】[0031]
【発明の効果】この発明は以下の効果を発揮する。 （１）可撓部・ストレート部一体成形型のブーツを装着
したドライブシャフトにおいて、上記ブーツをＴＰＥ若
しくはＴＰＥ組成物により形成したものであるため、従
来のＣＲゴム製の物に比べ、機械的強度が向上する。こ
のため、ブーツの肉厚を薄くすることができ、ブーツの
軽量化を図ることができる。 （２）一体ブロー成形により容易に成形できるので、成
形時のサイクルタイムが減少し、成形能率を向上するこ
とができる。 （３）従来のＣＲ製のものに比べ、ストレート部におけ
る摺動性が向上し、ブーツの耐久性がさらに向上すると
共に、耐摩耗性が向上する。 （４）継手外輪に対する固着手段として溶着接合が採用
できるので、ブーツバンドは必ずしも用いる必要がな
い。これにより、コストダウンと共に、継手外径のコン
パクト化を図ることができる。 （５）継手外輪と中間軸の防錆用の塗装が不要になる。 （６）従来のＣＲ製に比べ、ＴＰＥ若しくはＴＰＥ組成
物により形成したものは、耐オゾン性が格段に向上す
る。 （７）従来のＣＲ製に比べ、ＴＰＥ若しくはＴＰＥ組成
物により形成したものは、熱可塑性であるためリサイク
ル性にすぐれている。The present invention has the following effects. (1) In a drive shaft equipped with a flexible / straight-part integrally molded boot, the boot is made of TPE or a TPE composition, so that the mechanical strength is higher than that of a conventional CR rubber product. Is improved. For this reason, the thickness of the boot can be reduced, and the boot can be reduced in weight. (2) Since molding can be easily performed by integral blow molding, the cycle time during molding can be reduced, and molding efficiency can be improved. (3) Compared with the conventional CR-made one, the slidability in the straight portion is improved, the durability of the boot is further improved, and the wear resistance is improved. (4) Since welding bonding can be adopted as a fixing means to the joint outer ring, a boot band is not necessarily used. Thereby, it is possible to reduce the cost and to make the outer diameter of the joint compact. (5) Rust prevention coating on the outer ring of the joint and the intermediate shaft becomes unnecessary. (6) Compared to conventional CR products, those formed of TPE or TPE composition have significantly improved ozone resistance. (7) Compared with conventional CR products, those made of TPE or TPE composition are excellent in recyclability because they are thermoplastic.
【図１】第１実施形態の断面図FIG. 1 is a cross-sectional view of a first embodiment.
【図２】（ａ）（ｂ）同上の一部拡大断面図2 (a) and 2 (b) are partially enlarged sectional views of the same.
【図３】第２実施形態の断面図FIG. 3 is a sectional view of a second embodiment.
１、１’ 継手部 ２、２’ 内輪 ３ 中間軸 ４ 軸部 ５、５’ 外輪 ６ ブーツ ７、７’ 継手軸部 ８ ８’ 可撓部 ９ ストレート部 １０、１０’ 取付け部 １１、１１’ ブーツ溝 １２、１２’ 突条 １３、１３’ ブーツバンド 1, 1 'joint part 2, 2' inner ring 3 intermediate shaft 4 shaft part 5, 5 'outer ring 6 boot 7, 7' joint shaft part 8 8 'flexible part 9 straight part 10, 10' mounting part 11, 11 ' Boot groove 12, 12 'Ridge 13, 13' Boot band
Claims (8)
中間軸とからなる軸部と、上記一対の継手部を覆う可撓
部と上記中間軸を覆うストレート部とを一体成形したブ
ーツとからなるドライブシャフトにおいて、上記ブーツ
を熱可塑性エラストマー若しくは熱可塑性エラストマー
を含む組成物により形成したことを特徴とするドライブ
シャフト。1. A boot in which a shaft portion including a pair of joint portions and an intermediate shaft connecting between the joint portions, a flexible portion covering the pair of joint portions, and a straight portion covering the intermediate shaft are integrally formed. Wherein the boot is formed of a thermoplastic elastomer or a composition containing a thermoplastic elastomer.
２０〜９９重量％、ゴム８０〜１重量％の配合からなる
ことを特徴とする請求項１に記載のドライブシャフト。2. The drive shaft according to claim 1, wherein the composition comprises 20 to 99% by weight of a thermoplastic elastomer and 80 to 1% by weight of a rubber.
ツ溝を形成し、上記可撓部の端部内径面に形成した突条
を上記ブーツ溝に係合せしめ、溶着接合により上記継手
部と可撓部を固着したことを特徴とする請求項１又は２
に記載のドライブシャフト。3. An annular boot groove is formed on the outer diameter surface of the outer ring of each joint portion, and a ridge formed on the inner diameter surface of the end portion of the flexible portion is engaged with the boot groove. 3. A joint part and a flexible part are fixed.
The drive shaft according to 1.
属製のブーツバンドを巻回したことを特徴とする請求項
３に記載のドライブシャフト。4. The drive shaft according to claim 3, wherein a metal boot band is wound around an outer diameter surface of the fixing portion formed by the welding.
面の全面を覆うことを特徴とする請求項１から４のいず
れかに記載のドライブシャフト。5. The drive shaft according to claim 1, wherein the flexible portion covers the entire outer peripheral surface of the outer race of the joint portion.
る請求項１から５のいずれかに記載のドライブシャフ
ト。6. The drive shaft according to claim 1, wherein the intermediate shaft is hollow.
に摺動自在に嵌挿されたことを特徴とする請求項１から
６のいずれかに記載のドライブシャフト。7. The drive shaft according to claim 1, wherein the straight portion is slidably fitted on an outer diameter surface of the intermediate shaft.
とを特徴とする請求項１から７のいずれかに記載のドラ
イブシャフト。8. The drive shaft according to claim 1, wherein each of the joints is a constant velocity universal joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32694499A JP2001140849A (en) | 1999-11-17 | 1999-11-17 | Drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32694499A JP2001140849A (en) | 1999-11-17 | 1999-11-17 | Drive shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001140849A true JP2001140849A (en) | 2001-05-22 |
Family
ID=18193526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32694499A Pending JP2001140849A (en) | 1999-11-17 | 1999-11-17 | Drive shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001140849A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073583A1 (en) * | 2004-02-02 | 2005-08-11 | Ntn Corporation | Constant velocity universal joint for steering device and steering device |
| JP2006275161A (en) * | 2005-03-29 | 2006-10-12 | Showa Corp | Propeller shaft boot, propeller shaft, propeller shaft boot mounting method and propeller shaft sealing method |
| WO2007018247A1 (en) * | 2005-08-05 | 2007-02-15 | Honda Motor Co., Ltd. | Identification method for rotation drive force transmission mechanism |
| JP2007064479A (en) * | 2005-08-05 | 2007-03-15 | Honda Motor Co Ltd | Method for identifying rotational drive force transmission mechanism |
| JP2009052688A (en) * | 2007-08-28 | 2009-03-12 | Ntn Corp | Boot attachment method |
| US7547254B2 (en) * | 2004-05-24 | 2009-06-16 | Ntn Corporation | Drive shaft for ATVs |
| WO2016152420A1 (en) * | 2015-03-26 | 2016-09-29 | Ntn株式会社 | Boot attachment method and constant velocity universal joint |
| JP2018003905A (en) * | 2016-06-29 | 2018-01-11 | Ntn株式会社 | Boot for constant velocity universal joint and power force transmission structure with the boot |
| WO2018020991A1 (en) * | 2016-07-29 | 2018-02-01 | Ntn株式会社 | Constant-velocity universal joint |
-
1999
- 1999-11-17 JP JP32694499A patent/JP2001140849A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073583A1 (en) * | 2004-02-02 | 2005-08-11 | Ntn Corporation | Constant velocity universal joint for steering device and steering device |
| US7547254B2 (en) * | 2004-05-24 | 2009-06-16 | Ntn Corporation | Drive shaft for ATVs |
| JP2006275161A (en) * | 2005-03-29 | 2006-10-12 | Showa Corp | Propeller shaft boot, propeller shaft, propeller shaft boot mounting method and propeller shaft sealing method |
| WO2007018247A1 (en) * | 2005-08-05 | 2007-02-15 | Honda Motor Co., Ltd. | Identification method for rotation drive force transmission mechanism |
| JP2007064479A (en) * | 2005-08-05 | 2007-03-15 | Honda Motor Co Ltd | Method for identifying rotational drive force transmission mechanism |
| JP2009052688A (en) * | 2007-08-28 | 2009-03-12 | Ntn Corp | Boot attachment method |
| WO2016152420A1 (en) * | 2015-03-26 | 2016-09-29 | Ntn株式会社 | Boot attachment method and constant velocity universal joint |
| JP2018003905A (en) * | 2016-06-29 | 2018-01-11 | Ntn株式会社 | Boot for constant velocity universal joint and power force transmission structure with the boot |
| WO2018020991A1 (en) * | 2016-07-29 | 2018-02-01 | Ntn株式会社 | Constant-velocity universal joint |
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