JP2013064422A - Constant velocity universal joint - Google Patents

Constant velocity universal joint Download PDF

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JP2013064422A
JP2013064422A JP2011202011A JP2011202011A JP2013064422A JP 2013064422 A JP2013064422 A JP 2013064422A JP 2011202011 A JP2011202011 A JP 2011202011A JP 2011202011 A JP2011202011 A JP 2011202011A JP 2013064422 A JP2013064422 A JP 2013064422A
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shaft
sleeve
constant velocity
velocity universal
cylindrical cover
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JP5745978B2 (en
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Masato Fukuue
雅登 福上
Hideki Kondo
英樹 近藤
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a constant velocity universal joint including an inexpensive seal structure facilitating to secure stable sealing performance and enabling cost reduction.SOLUTION: In the constant velocity universal joint including an outer joint member 13 formed with track grooves 11 extending in the axial direction in a plurality of locations of the inner peripheral surface 12, an inner joint member 16 formed with track grooves 14 extending in the axial direction in a plurality of locations of the outer peripheral surface 15 and forming a pair with the track grooves 11 of the outer joint member 13, and balls 17 interposed between the track grooves 11 of the outer joint member 13 and the track grooves 14 of the inner joint member 16, with a sleeve 31 being externally fit to a shaft 19 extending from the inner joint member 16 by spline fitting so as to transmit torque and so as to be axially slidable, a cylindrical cover 36 made of a synthetic resin sealing the spline fitting section of the shaft 19 and the sleeve 31 is arranged between the shaft 19 and the sleeve 31.

Description

本発明は、例えば鉄鋼設備などの各種産業機械において、劣悪な環境下で使用される等速自在継手に関し、詳しくは、外部からの粉塵等の異物や水の侵入を防止する密封構造に関する。   The present invention relates to a constant velocity universal joint that is used in a poor environment in various industrial machines such as steel equipment, and more particularly to a sealing structure that prevents foreign matters such as dust from entering and water from entering.

例えば、鉄鋼設備などの各種産業機械において、駆動軸と従動軸とを連結して回転力を伝達する軸継手が使用されている。この軸継手の中には、劣悪な環境下で使用されるものがあり、そのような軸継手は、外部からの粉塵等の異物や水の侵入を防止するための密封構造を具備するのが一般的である（例えば、特許文献１参照）。   For example, in various industrial machines such as steel facilities, shaft couplings that transmit a rotational force by connecting a drive shaft and a driven shaft are used. Some of these shaft couplings are used in a poor environment, and such a shaft coupling is provided with a sealing structure for preventing foreign matters such as dust and water from entering from outside. It is general (see, for example, Patent Document 1).

この特許文献１に開示された軸継手は、一方のクロスジョイントに固定されたスプラインシャフトにスプラインチューブを嵌挿し、そのスプラインチューブを円筒部材によって他方のクロスジョイントに固定した構造を具備する。この軸継手において、スプラインチューブをクロスジョイントに固定する円筒部材は、外部からの粉塵等の異物や水の侵入を防止する密封構造をなすと共に、スプラインチューブと共にトルク伝達部材を構成している。   The shaft coupling disclosed in Patent Document 1 has a structure in which a spline tube is fitted into a spline shaft fixed to one cross joint, and the spline tube is fixed to the other cross joint by a cylindrical member. In this shaft coupling, the cylindrical member that fixes the spline tube to the cross joint has a sealing structure that prevents foreign matters such as dust and water from entering from outside, and constitutes a torque transmission member together with the spline tube.

特許文献１において、軸継手の密封構造をなす円筒部材は、炭素繊維強化プラスチックまたはガラス繊維強化プラスチックのいずれか一方、あるいは、炭素繊維強化プラスチックおよびガラス繊維強化プラスチックの両方をシール材料として形成され、捩れ方向において弾性を有する。   In Patent Document 1, the cylindrical member forming the sealing structure of the shaft coupling is formed using either carbon fiber reinforced plastic or glass fiber reinforced plastic, or both carbon fiber reinforced plastic and glass fiber reinforced plastic as a sealing material, It has elasticity in the twist direction.

実開平７−３５８２７号公報Japanese Utility Model Publication No. 7-35827

ところで、前述した特許文献１で開示された軸継手では、炭素繊維強化プラスチックやガラス繊維強化プラスチックをシール材料とした円筒部材からなる密封構造を採用すると共に、その円筒部材の捩れ方向の弾性を利用することによりトルク伝達部材として使用しているため、材料コストおよび加工コストが高くなる。   By the way, the shaft coupling disclosed in Patent Document 1 described above employs a sealing structure composed of a cylindrical member using carbon fiber reinforced plastic or glass fiber reinforced plastic as a sealing material, and utilizes the elasticity in the twisted direction of the cylindrical member. Since it is used as a torque transmission member by doing, material cost and processing cost become high.

また、特許文献１に開示された軸継手の構造では、スプライン嵌合部が完全に密封されておらず、粉塵、水、薬品（酸性、アルカリ性）が侵入する劣悪な環境下で使用する場合、十分なシール性を確保することが非常に困難であり、スプライン嵌合部の潤滑性を長期間維持することが困難となる。その結果、スプライン嵌合部に粉塵等の異物や水が侵入し易くなって、錆や焼付けにより耐久性の低下を招くことになる。   In addition, in the structure of the shaft coupling disclosed in Patent Document 1, the spline fitting portion is not completely sealed, and when used in a poor environment where dust, water, chemicals (acidic, alkaline) enter, It is very difficult to ensure sufficient sealing performance, and it becomes difficult to maintain the lubricity of the spline fitting portion for a long period of time. As a result, foreign matter such as dust and water easily enter the spline fitting portion, and the durability is lowered due to rust and baking.

そこで、本発明は前述の問題点に鑑みて提案されたもので、その目的とするところは、安定したシール性を確保することが容易でコスト低減を図り得る安価なシール構造を具備した等速自在継手を提供することにある。   Accordingly, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to provide a constant speed equipped with an inexpensive seal structure that is easy to ensure stable sealing performance and can reduce costs. It is to provide a universal joint.

前述の目的を達成するための技術的手段として、本発明は、軸方向に延びるトラック溝が内周面の複数箇所に形成された外側継手部材と、軸方向に延びるトラック溝が外側継手部材のトラック溝と対をなして外周面の複数箇所に形成された内側継手部材と、外側継手部材のトラック溝と内側継手部材のトラック溝との間に介在するトルク伝達部材とを備え、内側継手部材から延びるシャフトにスリーブをスプライン嵌合によりトルク伝達可能および軸方向へ摺動可能に外装した等速自在継手であって、シャフトおよびスリーブのスプライン嵌合部をシールする合成樹脂製の筒状カバーを設置したことを特徴とする。   As technical means for achieving the above-mentioned object, the present invention provides an outer joint member in which track grooves extending in the axial direction are formed at a plurality of locations on the inner peripheral surface, and a track groove extending in the axial direction of the outer joint member. An inner joint member comprising an inner joint member formed at a plurality of locations on the outer peripheral surface in pairs with the track groove, and a torque transmission member interposed between the track groove of the outer joint member and the track groove of the inner joint member A constant-velocity universal joint with a sleeve that is externally slidable in the axial direction and capable of transmitting torque by a spline fitting to a shaft extending from a cylindrical cover made of synthetic resin that seals the spline fitting portion of the shaft and sleeve It is characterized by having been installed.

本発明では、シャフトとスリーブとの間のスプライン嵌合部をトルク伝達部位とし、シャフトおよびスリーブとは別部材でトルク伝達させない筒状カバーをシール部材とすることで、その筒状カバーを安価な合成樹脂で製作する。これにより、材料コストおよび加工コストの低減が図れ、シャフトにスリーブを軸方向へ摺動可能に外装したスプライン嵌合部を完全に密封することで、劣悪な環境下であっても安定したシール性を確保することができ、スプライン嵌合部の潤滑性を長期間維持することが容易となって耐久性の向上が図れる。   In the present invention, the spline fitting portion between the shaft and the sleeve is used as a torque transmission part, and the cylindrical cover that is not subjected to torque transmission by a separate member from the shaft and the sleeve is used as a seal member, so that the cylindrical cover can be inexpensively manufactured. Made of synthetic resin. As a result, material costs and processing costs can be reduced, and the spline fitting part, in which the sleeve is slidable in the axial direction on the shaft, is completely sealed, ensuring stable sealing even in adverse environments. It is easy to maintain the lubricity of the spline fitting portion for a long period of time, and durability can be improved.

本発明における筒状カバーは、硬質塩化ビニルあるいは熱硬化性樹脂のいずれか一方の材質で構成されていることが望ましい。このように、筒状カバーを硬質塩化ビニルや熱硬化性樹脂で構成すれば、従来使用されていた炭素繊維強化プラスチックやガラス繊維強化プラスチックに比べて安価であり、加工性に優れる点で有効である。   The cylindrical cover in the present invention is preferably made of either one of hard vinyl chloride or a thermosetting resin. Thus, if the cylindrical cover is made of hard vinyl chloride or thermosetting resin, it is cheaper than carbon fiber reinforced plastic and glass fiber reinforced plastic that have been used in the past, and is effective in terms of excellent workability. is there.

本発明における筒状カバーは、一端がシャフトに固定されると共に他端がスリーブの外周面に装着されたＯリングを介してスリーブに軸方向へ摺動可能に外装され、Ｏリングと当接する内周面に摺動抵抗低減材が被着されている構造が望ましい。このように、軸方向に摺動するスリーブのＯリングと当接する筒状カバーの内周面に摺動抵抗低減材を被着させれば、Ｏリングと筒状カバーとの摺動抵抗を抑制することができ、Ｏリングの長寿命化が図れる。   The cylindrical cover according to the present invention is externally attached to the sleeve so as to be slidable in the axial direction through an O-ring having one end fixed to the shaft and the other end attached to the outer peripheral surface of the sleeve, and is in contact with the O-ring. A structure in which a sliding resistance reducing material is attached to the peripheral surface is desirable. In this way, sliding resistance between the O-ring and the cylindrical cover can be suppressed by attaching a sliding resistance reducing material to the inner peripheral surface of the cylindrical cover that contacts the O-ring of the sleeve sliding in the axial direction. The life of the O-ring can be extended.

本発明における筒状カバーは、一端が間座を介してシャフトに固定されている構造が望ましい。このようにすれば、シャフトおよびスリーブのスプライン嵌合部をシールする筒状カバーを、シャフトとスリーブとの間に設置する構造を容易に実現することができる。   As for the cylindrical cover in this invention, the structure where one end is being fixed to the shaft via the spacer is desirable. In this way, it is possible to easily realize a structure in which the cylindrical cover that seals the spline fitting portion of the shaft and the sleeve is installed between the shaft and the sleeve.

なお、本発明では、筒状カバーと間座とを一体化した構造が望ましい。このようにすれば、筒状カバーを間座に取り付ける上で部品点数および組立工数の削減が可能となる点で有効である。   In the present invention, a structure in which the cylindrical cover and the spacer are integrated is desirable. This is effective in that the number of parts and the number of assembling steps can be reduced when attaching the cylindrical cover to the spacer.

本発明における筒状カバーの一端は、シャフトの外周面に装着された止め輪により位置規制された状態で固定されている構造が望ましい。このようにすれば、筒状カバーの一端をシャフトに対して位置決めした状態で固定することが容易に実現できる。   A structure in which one end of the cylindrical cover in the present invention is fixed in a state in which the position is restricted by a retaining ring attached to the outer peripheral surface of the shaft is desirable. In this way, it is possible to easily realize fixing with one end of the cylindrical cover positioned with respect to the shaft.

本発明における筒状カバーの一端は、シャフトの外周面に一体的に形成された突起により位置規制された状態で固定されている構造が望ましい。このようにすれば、筒状カバーの一端をシャフトに対して位置決めした状態で固定する上で前述の止め輪を省略できて部品点数の低減が図れる。   A structure in which one end of the cylindrical cover in the present invention is fixed in a state in which the position is regulated by a protrusion integrally formed on the outer peripheral surface of the shaft is desirable. If it does in this way, when fixing the end of a cylindrical cover in the state positioned with respect to the shaft, the above-mentioned retaining ring can be omitted and the number of parts can be reduced.

本発明によれば、シャフトとスリーブとの間のスプライン嵌合部をトルク伝達部位とし、シャフトおよびスリーブとは別部材でトルク伝達させない筒状カバーをシール部材とすることで、その筒状カバーを安価な合成樹脂で製作する。これにより、材料コストおよび加工コストの低減が図れ、シャフトにスリーブを軸方向へ摺動可能に外装したスプライン嵌合部を完全に密封することで、劣悪な環境下であっても安定したシール性を確保することができ、スプライン嵌合部の潤滑性を長期間維持することが容易となって耐久性の向上が図れる。その結果、安定したシール性を確保することが容易でコスト低減を図り得る安価なシール構造を具備した等速自在継手を提供できる。   According to the present invention, the spline fitting portion between the shaft and the sleeve is used as a torque transmission part, and the cylindrical cover that is not subjected to torque transmission by a separate member from the shaft and the sleeve is used as a seal member. Manufactured with inexpensive synthetic resin. As a result, material costs and processing costs can be reduced, and the spline fitting part, in which the sleeve is slidable in the axial direction on the shaft, is completely sealed, ensuring stable sealing even in adverse environments. It is easy to maintain the lubricity of the spline fitting portion for a long period of time, and durability can be improved. As a result, it is possible to provide a constant velocity universal joint having an inexpensive seal structure that is easy to ensure stable sealing performance and can reduce costs.

本発明の実施形態で、ツェッパ型等速自在継手の全体構成を示す縦断面図である。In an embodiment of the present invention, it is a longitudinal section showing the whole composition of a Rzeppa type constant velocity universal joint. 図１の筒状カバーによるシール構造を示す拡大断面図である。It is an expanded sectional view which shows the seal structure by the cylindrical cover of FIG. 図１の筒状カバーと間座とを一体化した構造を示す拡大断面図である。It is an expanded sectional view which shows the structure which integrated the cylindrical cover and spacer of FIG. 図１の間座をシャフトに対して突起で位置規制した構造を示す拡大断面図である。It is an expanded sectional view which shows the structure which position-controlled the spacer of FIG. 1 with the processus | protrusion with respect to the shaft.

本発明に係る等速自在継手の実施形態を以下に詳述する。以下の実施形態では、トルク伝達部材としてボールを用いたボールタイプのツェッパ型等速自在継手（ＢＪ）を例示するが、他のボールタイプの固定式等速自在継手としてアンダーカットフリー型等速自在継手（ＵＪ）にも適用可能であり、さらに、他のボールタイプの摺動式等速自在継手としてダブルオフセット型等速自在継手（ＤＯＪ）にも適用可能である。   Embodiments of the constant velocity universal joint according to the present invention will be described in detail below. In the following embodiment, a ball type Rzeppa constant velocity universal joint (BJ) using a ball as a torque transmitting member is illustrated, but an undercut free type constant velocity universal joint is used as another ball type fixed constant velocity universal joint. The present invention can be applied to a joint (UJ), and can also be applied to a double offset type constant velocity universal joint (DOJ) as another ball type sliding constant velocity universal joint.

また、以下の実施形態では、各種産業機械の中でも、例えば、各種ロールに駆動力を伝達するロール駆動力伝達装置に使用される等速自在継手を例示する。このロール駆動力伝達装置は、８０℃程度の輻射熱、水蒸気による高温多湿、スケールの飛散、薬品類を含む化学水の飛散などによる劣悪な環境下で使用される。   Moreover, in the following embodiment, the constant velocity universal joint used for the roll drive force transmission apparatus which transmits a drive force to various rolls among various industrial machines is illustrated, for example. This roll driving force transmission device is used in a poor environment due to radiant heat of about 80 ° C., high temperature and high humidity due to water vapor, scattering of scale, scattering of chemical water containing chemicals, and the like.

図１に示すツェッパ型等速自在継手は、軸方向に延びる複数の円弧状トラック溝１１が球面状内周面１２に円周方向等間隔で形成された外側継手部材１３と、その外側継手部材１３のトラック溝１１と対をなして複数の円弧状トラック溝１４が球面状外周面１５に円周方向等間隔で形成された内側継手部材１６と、外側継手部材１３のトラック溝１１と内側継手部材１６のトラック溝１４との間に介在するトルク伝達部材としてのボール１７と、外側継手部材１３の球面状内周面１２と内側継手部材１６の球面状外周面１５との間に配されてボール１７を保持するケージ１８とで主要部が構成されている。   The Rzeppa constant velocity universal joint shown in FIG. 1 includes an outer joint member 13 in which a plurality of arc-shaped track grooves 11 extending in the axial direction are formed on a spherical inner peripheral surface 12 at equal intervals in the circumferential direction, and the outer joint member. An inner joint member 16 in which a plurality of arc-shaped track grooves 14 are formed on the spherical outer peripheral surface 15 at equal intervals in the circumferential direction, and the track groove 11 and the inner joint of the outer joint member 13 A ball 17 as a torque transmitting member interposed between the track groove 14 of the member 16 and the spherical inner peripheral surface 12 of the outer joint member 13 and the spherical outer peripheral surface 15 of the inner joint member 16 are arranged. The main part is composed of the cage 18 that holds the balls 17.

内側継手部材１６には、シャフト１９がスプライン嵌合によりトルク伝達可能に結合されている。そのシャフト１９は、内側継手部材１６の軸方向両端部で止め輪２０，２１により抜け止めされている。この等速自在継手には、継手内部を密封するためのブーツ２２が装着されている。このブーツ２２は、シャフト１９に外嵌された小径筒部２３と、その小径筒部２３に可撓性連結部２４を介して径方向外側に配置された大径筒部２５とで構成されている。   A shaft 19 is coupled to the inner joint member 16 so that torque can be transmitted by spline fitting. The shaft 19 is prevented from coming off by retaining rings 20 and 21 at both axial ends of the inner joint member 16. The constant velocity universal joint is equipped with a boot 22 for sealing the inside of the joint. The boot 22 includes a small-diameter cylindrical portion 23 that is externally fitted to the shaft 19, and a large-diameter cylindrical portion 25 that is disposed on the small-diameter cylindrical portion 23 via the flexible coupling portion 24 on the radially outer side. Yes.

外側継手部材１３は二枚のプレート２６，２７に挟持され、ブーツ２２は一方のプレート２６を押える固定部材２８を介して外側継手部材１３に固定される。この外側継手部材１３、固定部材２８およびプレート２６，２７に共通して設けられた貫通孔２９にボルト（図示せず）を挿通して締め付けることにより、外側継手部材１３、固定部材２８およびプレート２６，２７を一体化する。   The outer joint member 13 is sandwiched between two plates 26 and 27, and the boot 22 is fixed to the outer joint member 13 via a fixing member 28 that presses one plate 26. The outer joint member 13, the fixing member 28, and the plate 26 are inserted into a through hole 29 provided in common to the outer joint member 13, the fixing member 28, and the plates 26, 27 and then tightened by inserting bolts (not shown). , 27 are integrated.

この等速自在継手は、図１および図２に示すように、内側継手部材１６から延びるシャフト１９にスリーブ３１をスプライン嵌合によりトルク伝達可能および軸方向へ摺動可能に外装した構造を具備する。つまり、シャフト１９の外周面に雄スプライン３２が形成されると共に、スリーブ３１の内周面に雌スプライン３３が形成され、シャフト１９にスリーブ３１を外挿することにより、シャフト１９の雄スプライン３２とスリーブ３１の雌スプライン３３とを嵌合させ、シャフト１９に対してスリーブ３１をトルク伝達可能および軸方向へ摺動可能としている。なお、スリーブ３１の端部には、鋼管３４が溶接３５により同軸的に連結固定されている。   As shown in FIGS. 1 and 2, the constant velocity universal joint has a structure in which a sleeve 31 is mounted on a shaft 19 extending from an inner joint member 16 so that torque can be transmitted by spline fitting and slidable in an axial direction. . That is, the male spline 32 is formed on the outer peripheral surface of the shaft 19, and the female spline 33 is formed on the inner peripheral surface of the sleeve 31. By inserting the sleeve 31 into the shaft 19, The female spline 33 of the sleeve 31 is fitted, and the sleeve 31 can transmit torque to the shaft 19 and can slide in the axial direction. A steel pipe 34 is coaxially connected and fixed to the end of the sleeve 31 by welding 35.

シャフト１９とスリーブ３１との間に、シャフト１９およびスリーブ３１のスプライン嵌合部（雄スプライン３２および雌スプライン３３）をシールする合成樹脂製の筒状カバー３６を設置する。つまり、シャフト１９にリング状の間座３７を外嵌し、シャフト１９の外周面二箇所に形成された環状凹溝３８，３９に止め輪４０，４１を嵌合させることにより、シャフト１９に対して間座３７を軸方向で位置規制して固定する。この間座３７の外周面に筒状カバー３６の一端が止めねじ４２で固定されてパッキン４３で封止されている。   Between the shaft 19 and the sleeve 31, a synthetic resin cylindrical cover 36 that seals the spline fitting portions (the male spline 32 and the female spline 33) of the shaft 19 and the sleeve 31 is installed. That is, by attaching the ring-shaped spacer 37 to the shaft 19 and fitting the retaining rings 40 and 41 to the annular concave grooves 38 and 39 formed at two locations on the outer peripheral surface of the shaft 19, The spacer 37 is fixed in position in the axial direction. One end of the cylindrical cover 36 is fixed to the outer peripheral surface of the spacer 37 with a set screw 42 and sealed with a packing 43.

一方、スリーブ３１の外周面に環状凹溝４４を形成し、その凹溝４４にＯリング４５を嵌入させ、そのＯリング４５を筒状カバー３６の内周面に当接させている。なお、スリーブ３１の一端にはプレート４６が加締め固定されている。このようにして、筒状カバー３６は、シャフト１９およびスリーブ３１のスプライン嵌合部をシールする密閉空間を形成する。   On the other hand, an annular groove 44 is formed on the outer peripheral surface of the sleeve 31, and an O-ring 45 is fitted into the groove 44, and the O-ring 45 is brought into contact with the inner peripheral surface of the cylindrical cover 36. A plate 46 is fixed by caulking to one end of the sleeve 31. Thus, the cylindrical cover 36 forms a sealed space that seals the spline fitting portion of the shaft 19 and the sleeve 31.

この等速自在継手では、シャフト１９とスリーブ３１をトルク伝達可能に外装したことにより、そのシャフト１９とスリーブ３１との間のスプライン嵌合部をトルク伝達部位とし、シャフト１９およびスリーブ３１とは別部材の筒状カバー３６をシール部材とすることで、その筒状カバー３６を安価な合成樹脂で製作するようにしている。   In this constant velocity universal joint, the shaft 19 and the sleeve 31 are packaged so as to be able to transmit torque, so that a spline fitting portion between the shaft 19 and the sleeve 31 is used as a torque transmission part, and is separate from the shaft 19 and the sleeve 31. By using the cylindrical cover 36 of the member as a sealing member, the cylindrical cover 36 is made of an inexpensive synthetic resin.

これにより、材料コストおよび加工コストの低減が図れ、シャフト１９にスリーブ３１を軸方向へ摺動可能に外装したスプライン嵌合部を完全に密封することで、スプライン嵌合部の繰り返し伸縮や、粉塵、水、スケールの飛散、薬品類などによる劣悪な環境下であっても安定したシール性を確保することができ、スプライン嵌合部の潤滑性を長期間維持することが容易となって耐久性の向上が図れる。   As a result, the material cost and the processing cost can be reduced, and the spline fitting portion in which the sleeve 31 is externally slidable on the shaft 19 is completely sealed, so that the spline fitting portion can be repeatedly expanded and contracted and Stable sealability can be ensured even in poor environments due to water, scale splashes, chemicals, etc., and it is easy to maintain the lubricity of the spline fitting part for a long period of time. Can be improved.

この筒状カバー３６は、合成樹脂として、硬質塩化ビニルあるいは熱硬化性樹脂のいずれか一方の材質で構成されている。このように、筒状カバー３６を硬質塩化ビニルや熱硬化性樹脂で構成することにより、従来使用されていた炭素繊維強化プラスチックやガラス繊維強化プラスチックに比べて安価であり、加工性に優れる。なお、合成樹脂製の筒状カバー３６は切削加工が容易であることから、必要な軸方向寸法に加工することが容易である。   The cylindrical cover 36 is made of either a hard vinyl chloride or a thermosetting resin as a synthetic resin. Thus, by comprising the cylindrical cover 36 with a hard vinyl chloride or a thermosetting resin, it is cheaper than the carbon fiber reinforced plastics and glass fiber reinforced plastics conventionally used, and is excellent in workability. In addition, since the cylindrical cover 36 made of synthetic resin is easy to cut, it can be easily processed to a required axial dimension.

軸方向に摺動するスリーブ３１の外周面に装着されたＯリング４５と当接する筒状カバー３６の内周面に摺動抵抗低減材を被着させることが可能である。これにより、Ｏリング４５と筒状カバー３６との摺動抵抗を抑制することができ、Ｏリング４５の長寿命化が図れる。なお、摺動抵抗低減材としては、シリコン系オイルやコーティング材が好適で、これらシリコン系オイルやコーティング材を筒状カバー３６の内周面に塗布すればよい。   A sliding resistance reducing material can be attached to the inner peripheral surface of the cylindrical cover 36 that contacts the O-ring 45 mounted on the outer peripheral surface of the sleeve 31 that slides in the axial direction. Thereby, sliding resistance between the O-ring 45 and the cylindrical cover 36 can be suppressed, and the life of the O-ring 45 can be extended. As the sliding resistance reducing material, silicon-based oil or coating material is suitable, and these silicon-based oil or coating material may be applied to the inner peripheral surface of the cylindrical cover 36.

以上の実施形態では、筒状カバー３６を間座３７を介してシャフト１９に固定した構造とすることにより、シャフト１９およびスリーブ３１のスプライン嵌合部をシールする筒状カバー３６を、シャフト１９とスリーブ３１との間に設置する構造が容易に実現できる。なお、図３に示すように、筒状カバー３６と間座３７とを一体化した構造を備えた筒状カバー４６を採用することも可能である。   In the above embodiment, the cylindrical cover 36 that seals the spline fitting portion of the shaft 19 and the sleeve 31 is fixed to the shaft 19 by fixing the cylindrical cover 36 to the shaft 19 via the spacer 37. A structure installed between the sleeve 31 and the sleeve 31 can be easily realized. In addition, as shown in FIG. 3, it is also possible to employ | adopt the cylindrical cover 46 provided with the structure which integrated the cylindrical cover 36 and the spacer 37. As shown in FIG.

このように筒状カバー３６と間座３７とを一体化した構造を具備する筒状カバー４６を採用することにより、筒状カバー３６を間座３７に取り付ける上で止めねじ４２やパッキン４３（図２参照）を省略することができるので、部品点数の削減が可能となる。また、筒状カバー３６の外側に位置する止めねじ４２の防錆処理が不要となることから、組立工数の削減も可能となる。   By adopting the cylindrical cover 46 having a structure in which the cylindrical cover 36 and the spacer 37 are integrated as described above, the set screw 42 and the packing 43 (see FIG. 2) can be omitted, so that the number of parts can be reduced. Further, since the rust prevention treatment of the set screw 42 located outside the cylindrical cover 36 is not required, the number of assembling steps can be reduced.

また、以上の実施形態では、シャフト１９に対して間座３７を止め輪４０，４１により位置規制した状態で固定することにより、シャフト１９に対する間座３７の位置決め固定を容易にしている。一方、図４に示すように、間座３７を、シャフト１９の外周面に一体的に形成された突起４７により位置規制した状態で固定することも可能である。   Further, in the above embodiment, the spacer 37 is fixed to the shaft 19 in a state in which the spacer 37 is regulated by the retaining rings 40 and 41 to facilitate positioning and fixing of the spacer 37 with respect to the shaft 19. On the other hand, as shown in FIG. 4, the spacer 37 can be fixed in a state in which the position is restricted by a protrusion 47 formed integrally with the outer peripheral surface of the shaft 19.

筒状カバー３６の外側に位置する止め輪４１の場合、水などがかかる環境下にあるため防錆処理を施す必要があるが、前述のように間座３７を突起４７により位置決め固定することにより、止め輪４１を省略することで、その止め輪４１の防錆処理が不要になると共に部品点数の低減が図れる。   In the case of the retaining ring 41 located outside the cylindrical cover 36, it is necessary to carry out a rust prevention treatment because it is in an environment where water or the like is applied. However, as described above, the spacer 37 is positioned and fixed by the projection 47. By omitting the retaining ring 41, the rust prevention treatment of the retaining ring 41 becomes unnecessary and the number of parts can be reduced.

この場合、間座３７は、シャフト１９に対して図示右側から突起４７を越えさせて押し込むことで組み付けが可能となる。なお、図示しないが、筒状カバー３６の内側に位置するもう一方の止め輪４０を突起に変更することも可能である。   In this case, the spacer 37 can be assembled by being pushed into the shaft 19 from the right side of the figure beyond the projection 47. Although not shown, the other retaining ring 40 located inside the cylindrical cover 36 can be changed to a protrusion.

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 embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

１１ トラック溝
１２ 内周面
１３ 外側継手部材
１４ トラック溝
１５ 外周面
１６ 内側継手部材
１７ トルク伝達部材（ボール）
１９ シャフト
３１ スリーブ
３２，３３ スプライン嵌合部（雄スプラインおよび雌スプライン）
３６ 筒状カバー
３７ 間座
４０，４１ 止め輪
４５ Ｏリング
４７ 突起 DESCRIPTION OF SYMBOLS 11 Track groove 12 Inner peripheral surface 13 Outer joint member 14 Track groove 15 Outer peripheral surface 16 Inner joint member 17 Torque transmission member (ball)
19 Shaft 31 Sleeve 32, 33 Spline fitting part (male spline and female spline)
36 Cylindrical cover 37 Spacer 40, 41 Retaining ring 45 O-ring 47 Projection

Claims (7)

軸方向に延びるトラック溝が内周面の複数箇所に形成された外側継手部材と、軸方向に延びるトラック溝が前記外側継手部材のトラック溝と対をなして外周面の複数箇所に形成された内側継手部材と、前記外側継手部材のトラック溝と前記内側継手部材のトラック溝との間に介在するトルク伝達部材とを備え、前記内側継手部材から延びるシャフトにスリーブをスプライン嵌合によりトルク伝達可能および軸方向へ摺動可能に外装した等速自在継手であって、前記シャフトとスリーブとの間に、前記シャフトおよびスリーブのスプライン嵌合部をシールする合成樹脂製の筒状カバーを設置したことを特徴とする等速自在継手。   An outer joint member in which track grooves extending in the axial direction are formed at a plurality of locations on the inner peripheral surface, and a track groove extending in the axial direction are formed at a plurality of locations on the outer peripheral surface in pairs with the track grooves of the outer joint member. An inner joint member, a torque transmission member interposed between the track groove of the outer joint member and the track groove of the inner joint member, and capable of transmitting torque by spline fitting a sleeve to a shaft extending from the inner joint member And a constant velocity universal joint slidably mounted in the axial direction, and a synthetic resin cylindrical cover for sealing the spline fitting portion of the shaft and the sleeve is installed between the shaft and the sleeve. A constant velocity universal joint characterized by 前記筒状カバーは、硬質塩化ビニルあるいは熱硬化性樹脂のいずれか一方の材質で構成されている請求項１に記載の等速自在継手。   The constant velocity universal joint according to claim 1, wherein the cylindrical cover is made of one of hard vinyl chloride and a thermosetting resin. 前記筒状カバーは、一端がシャフトに固定されると共に他端がスリーブの外周面に装着されたＯリングを介して前記スリーブに軸方向へ摺動可能に外装され、前記Ｏリングと当接する内周面に摺動抵抗低減材が被着されている請求項１又は２に記載の等速自在継手。   The cylindrical cover is externally mounted on the sleeve so as to be slidable in the axial direction through an O-ring having one end fixed to the shaft and the other end attached to the outer peripheral surface of the sleeve, and is in contact with the O-ring. The constant velocity universal joint according to claim 1, wherein a sliding resistance reducing material is attached to a peripheral surface. 前記筒状カバーは、一端が間座を介してシャフトに固定されている請求項１〜３のいずれか一項に記載の等速自在継手。   The constant velocity universal joint according to any one of claims 1 to 3, wherein one end of the cylindrical cover is fixed to a shaft via a spacer. 前記筒状カバーと前記間座とを一体化した請求項４に記載の等速自在継手。   The constant velocity universal joint according to claim 4, wherein the cylindrical cover and the spacer are integrated. 前記筒状カバーの一端は、前記シャフトの外周面に装着された止め輪により位置規制された状態で固定されている請求項１〜５のいずれか一項に記載の等速自在継手。   The constant velocity universal joint according to any one of claims 1 to 5, wherein one end of the cylindrical cover is fixed in a state of being regulated by a retaining ring attached to an outer peripheral surface of the shaft. 前記筒状カバーの一端は、前記シャフトの外周面に一体的に形成された突起により位置規制された状態で固定されている請求項１〜５のいずれか一項に記載の等速自在継手。   The constant velocity universal joint according to any one of claims 1 to 5, wherein one end of the cylindrical cover is fixed in a state of being regulated by a protrusion integrally formed on the outer peripheral surface of the shaft.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019525089A (en) * 2016-08-09 2019-09-05 デーナ、オータモウティヴ、システィムズ、グループ、エルエルシー Propeller shaft slip member with collision collapse assembly

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JP2005096541A (en) * 2003-09-24 2005-04-14 Nsk Ltd Intermediate shaft device for vehicular steering device
JP2007064407A (en) * 2005-08-31 2007-03-15 Ntn Corp Boot for constant velocity universal joint
JP2008267413A (en) * 2007-04-16 2008-11-06 Toyota Motor Corp Slide joint

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Publication number Priority date Publication date Assignee Title
US3123990A (en) * 1964-03-10 Lubrication arrangement for tele-
US5230658A (en) * 1992-04-06 1993-07-27 Burton Robert A Driveshaft with slip joint seal
JP2005096541A (en) * 2003-09-24 2005-04-14 Nsk Ltd Intermediate shaft device for vehicular steering device
JP2007064407A (en) * 2005-08-31 2007-03-15 Ntn Corp Boot for constant velocity universal joint
JP2008267413A (en) * 2007-04-16 2008-11-06 Toyota Motor Corp Slide joint

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019525089A (en) * 2016-08-09 2019-09-05 デーナ、オータモウティヴ、システィムズ、グループ、エルエルシー Propeller shaft slip member with collision collapse assembly
US11156253B2 (en) 2016-08-09 2021-10-26 Dana Automotive Systems Group, Llc Propeller shaft slip member with crash collapse assembly

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