JP2011093441A - Supporting structure of propeller shaft - Google Patents

Supporting structure of propeller shaft Download PDF

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Publication number
JP2011093441A
JP2011093441A JP2009249810A JP2009249810A JP2011093441A JP 2011093441 A JP2011093441 A JP 2011093441A JP 2009249810 A JP2009249810 A JP 2009249810A JP 2009249810 A JP2009249810 A JP 2009249810A JP 2011093441 A JP2011093441 A JP 2011093441A
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Japan
Prior art keywords
propeller shaft
elastic member
support member
water return
annular support
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JP2009249810A
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JP4956599B2 (en
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Yasuaki Habara
康明 羽原
Takahiro Nozaki
貴博 野崎
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Honda Motor Co Ltd
Showa Corp
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Honda Motor Co Ltd
Showa Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/06—Drive shafts

Abstract

<P>PROBLEM TO BE SOLVED: To improve sealing performance of a center bearing without using a dust seal in a supporting structure of a propeller shaft. <P>SOLUTION: In the supporting structure of the propeller shaft 12, an annular flashing part 60 surrounding the propeller shaft 12 is arranged on a front surface surrounding the propeller shaft 12 of an elastic member 33 in an annular supporting member 30, and moreover, which is the front surface positioned axially forward relative to a position where a flange 42 of a stopper piece 40 covers the front end opening 30A of the annular supporting member 30. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明はプロペラシャフトの支持構造に関する。   The present invention relates to a propeller shaft support structure.

プロペラシャフトの支持構造として、特許文献１に記載の如く、環状支持部材における弾性部材の内周に備えた内環に、センタベアリングを介してプロペラシャフトを回転自在に支持し、プロペラシャフトに圧入されるストッパピースがセンタベアリングの端面に衝合し、センタベアリングをプロペラシャフトに対して位置決め固定するとともに、ストッパピースのフランジが内環の内部に通じる環状支持部材の前端開口を覆ってなるものがある。このプロペラシャフトの支持構造では、ストッパピースのフランジが環状支持部材の内環の前端面に隙間を介して相対し、環状支持部材の前端開口を覆うことにより、内環の内部への直接の水の浸入を防止し、センタベアリングをシールしている。   As a propeller shaft support structure, as described in Patent Document 1, a propeller shaft is rotatably supported via a center bearing on an inner ring provided on an inner periphery of an elastic member in an annular support member, and is pressed into the propeller shaft. The stopper piece is abutted against the end face of the center bearing, the center bearing is positioned and fixed to the propeller shaft, and the flange of the stopper piece covers the front end opening of the annular support member that communicates with the inside of the inner ring. . In this propeller shaft support structure, the flange of the stopper piece is opposed to the front end surface of the inner ring of the annular support member via a gap and covers the front end opening of the annular support member, thereby directly Prevents intrusion and seals the center bearing.

特開2006-207620JP 2006-207620

特許文献１に記載のプロペラシャフトの支持構造では、環状支持部材の前端開口から内環の内部への水の浸入を十分に防止できないことから、内環の内周に取着したダストシールにより、センタベアリングをシールすることが必要になっている。   In the propeller shaft support structure described in Patent Document 1, water cannot enter the inner ring from the front end opening of the annular support member sufficiently. It is necessary to seal the bearing.

従って、ダストシールを用いることによるコスト高を伴うとともに、ダストシールを内環の軸方向の内部に押し込み挿入して位置決めする必要があり、ダストシールの組付性が悪い。   Therefore, the use of the dust seal is accompanied by high costs, and it is necessary to position the dust seal by inserting it into the inner ring in the axial direction, and the assemblability of the dust seal is poor.

本発明の課題は、プロペラシャフトの支持構造において、ダストシールを用いることなく、センタベアリングのシール性を向上することにある。   An object of the present invention is to improve the sealability of the center bearing without using a dust seal in the propeller shaft support structure.

請求項１の発明は、環状支持部材における弾性部材の内周に備えた内環に、センタベアリングを介してプロペラシャフトを回転自在に支持し、プロペラシャフトに圧入されるストッパピースがセンタベアリングの端面に衝合し、センタベアリングをプロペラシャフトに対して位置決め固定するとともに、ストッパピースのフランジが内環の内部に通じる環状支持部材の前端開口を覆ってなるプロペラシャフトの支持構造において、環状支持部材における弾性部材のプロペラシャフトを囲む前面であって、ストッパピースのフランジが環状支持部材の前端開口を覆う位置よりも軸方向で前方に位置する前面に、プロペラシャフトを囲む環状の水返し部を設けてなるようにしたものである。   According to the first aspect of the present invention, the propeller shaft is rotatably supported on the inner ring provided on the inner periphery of the elastic member of the annular support member via the center bearing, and the stopper piece press-fitted into the propeller shaft is the end face of the center bearing. In the propeller shaft support structure in which the center bearing is positioned and fixed with respect to the propeller shaft, and the flange of the stopper piece covers the front end opening of the annular support member leading to the inside of the inner ring. An annular water return portion that surrounds the propeller shaft is provided on the front surface that surrounds the propeller shaft of the elastic member, on the front surface in which the flange of the stopper piece is positioned forward in the axial direction from the position that covers the front end opening of the annular support member. It was made to become.

請求項２の発明は、請求項１の発明において更に、前記水返し部が前記弾性部材の前面から前方斜め下向きの水返し面を張出し形成してなるようにしたものである。   According to a second aspect of the present invention, in the first aspect of the invention, the water return portion is formed by projecting a water return surface obliquely downward and forward from the front surface of the elastic member.

請求項３の発明は、請求項１又は２の発明において更に、前記水返し部が前記弾性部材のプロペラシャフトを囲む前面の最も前方位置に設けられてなるようにしたものである。   According to a third aspect of the present invention, in the first or second aspect of the present invention, the water return portion is provided at the foremost position of the front surface surrounding the propeller shaft of the elastic member.

請求項４の発明は、請求項１〜３のいずれかの発明において更に、前記水返し部が前記弾性部材のプロペラシャフトを囲む前面に複数個設けられてなるようにしたものである。   According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a plurality of the water return portions are provided on the front surface surrounding the propeller shaft of the elastic member.

請求項５の発明は、請求項１〜４のいずれかの発明において更に、前記弾性部材がストッパピースのフランジと相対してセンタベアリングをシールするシールリップを一体に備えるようにしたものである。   According to a fifth aspect of the present invention, in the first aspect of the present invention, the elastic member is integrally provided with a seal lip that seals the center bearing relative to the flange of the stopper piece.

（請求項１）
(a)環状支持部材における弾性部材のプロペラシャフトを囲む前面であって、ストッパピースのフランジが環状支持部材の前端開口を覆う位置よりも軸方向で前方に位置する前面に、プロペラシャフトを囲む環状の水返し部を設けた。従って、車両の前方（車両の前進方向）から吹き付ける泥水等の水が、環状支持部材における弾性部材の前面に降りかけられて垂れ落ちる過程で、その垂れ落ち方向を水返し部により環状支持部材の前端開口よりも軸方向で前方に向かうように制御する。これにより、環状支持部材の前端開口から内環の内部への水の浸入をその前端開口よりも手前で遮断し、内環の内部への水の浸入を十分に防止できる。これにより、内環の内周にダストシールを取着することなく、センタベアリングのシール性を向上できる。 (Claim 1)
(a) An annular surface surrounding the propeller shaft on the front surface surrounding the propeller shaft of the elastic member, the front surface of which the flange of the stopper piece is positioned forward in the axial direction from the position covering the front end opening of the annular support member The water return part was provided. Accordingly, in the process in which muddy water or the like sprayed from the front of the vehicle (the forward direction of the vehicle) falls on the front surface of the elastic member in the annular support member and hangs down, the sag direction is changed by the water return portion of the annular support member. It controls so that it may go ahead in an axial direction rather than a front end opening. Thereby, the entrance of water from the front end opening of the annular support member to the inside of the inner ring is blocked before the front end opening, and the entry of water to the inside of the inner ring can be sufficiently prevented. Thereby, the sealing performance of the center bearing can be improved without attaching a dust seal to the inner periphery of the inner ring.

（請求項２）
(b)水返し部が前記弾性部材の前面から前方斜め下向きの水返し面を張出し形成した。従って、環状支持部材における弾性部材の前面に降りかけられて垂れ落ちる水の垂れ落ち方向を、水返し部の前方斜め下向きの水返し面により、環状支持部材の前端開口よりも前方に向かう方向に一層確実に制御し、内環の内部への水の浸入を一層十分に防止できる。 (Claim 2)
(b) A water return portion is formed by projecting a water return surface obliquely downward and forward from the front surface of the elastic member. Therefore, the drooping direction of the water that falls on the front surface of the elastic member in the annular support member is directed forward from the front end opening of the annular support member by the water return surface obliquely downward and forward of the water return portion. It is possible to control more reliably and prevent water from entering the inner ring more sufficiently.

（請求項３）
(c)水返し部が前記弾性部材のプロペラシャフトを囲む前面の最も前方位置に設けられた。従って、環状支持部材における弾性部材の前面に降りかけられて垂れ落ちる水の垂れ落ちを、環状支持部材の前端開口よりも一層手前に配置した水返し部で遮断し、内環の内部への水の浸入を一層十分に防止できる。 (Claim 3)
(c) The water return portion is provided at the frontmost position on the front surface surrounding the propeller shaft of the elastic member. Therefore, the drooping of the water that falls on the front surface of the elastic member in the annular support member is blocked by the water return portion disposed further in front of the front end opening of the annular support member, and the water into the inner ring is blocked. Can be more sufficiently prevented.

（請求項４）
(d)水返し部が前記弾性部材のプロペラシャフトを囲む前面に複数個設けた。従って、環状支持部材における弾性部材の前面に降りかけられて垂れ落ちる水の垂れ落ちを、環状支持部材の前端開口よりも手前で複数個の水返し部により多段階的に遮断し、内環の内部への水の浸入を一層十分に防止できる。 (Claim 4)
(d) A plurality of water return portions are provided on the front surface surrounding the propeller shaft of the elastic member. Therefore, the drooping of water that falls on the front surface of the elastic member in the annular support member is blocked in a multistage manner by a plurality of water return portions before the front end opening of the annular support member, and the inner ring It is possible to prevent water from entering inside more sufficiently.

（請求項５）
(e)環状支持部材の弾性部材がストッパピースのフランジと相対してセンタベアリングをシールするシールリップを一体に備えた。従って、水返し部の存在にもかかわらず、ストッパピースのフランジが覆う環状支持部材の前端開口の側へ回り込んだ水の浸入、異物の侵入を、弾性部材が一体に備えるシールリップにより確実に遮断できる。内環の内部、ひいてはセンタベアリングを外部空間に対して完全にシールするものになる。 (Claim 5)
(e) The elastic member of the annular support member is integrally provided with a seal lip that seals the center bearing relative to the flange of the stopper piece. Therefore, in spite of the presence of the water return portion, the elastic member integrally secures the intrusion of water and the intrusion of foreign matter that have entered the front end opening side of the annular support member covered by the flange of the stopper piece. Can be blocked. The inside of the inner ring and thus the center bearing is completely sealed against the outer space.

図１は実施例１のプロペラシャフトの支持構造を示す断面図である。FIG. 1 is a cross-sectional view illustrating a propeller shaft support structure according to the first embodiment. 図２は図１の要部断面図である。FIG. 2 is a cross-sectional view of the main part of FIG. 図３は実施例２の要部断面図である。FIG. 3 is a cross-sectional view of a main part of the second embodiment. 図４は実施例３の要部断面図である。FIG. 4 is a cross-sectional view of a main part of the third embodiment.

（実施例１）（図１、図２）
図１は自在継手用ブーツを示す断面図である。図１は、車両のエンジン側の第１プロペラシャフト１１と後輪側の第２プロペラシャフト１２を、ＤＯＪ型の等速自在継手（スライダブルジョイント）２０により連結した部分を示している。 Example 1 (FIGS. 1 and 2)
FIG. 1 is a cross-sectional view showing a universal joint boot. FIG. 1 shows a portion where a first propeller shaft 11 on a vehicle engine side and a second propeller shaft 12 on a rear wheel side are connected by a DOJ type constant velocity universal joint (slidable joint) 20.

自在継手２０は、第１プロペラシャフト１１に接続されたアウタ２１と、第２プロペラシャフト１２に接続されたシャフトスタブ２２の先端部に形成したインナ２３とを有し、ボール２４をインナ２３の外周面とアウタ２１の内周面間の３ヵ所に設けた３条の溝２１Ａに嵌入して構成される。   The universal joint 20 has an outer 21 connected to the first propeller shaft 11 and an inner 23 formed at the tip of a shaft stub 22 connected to the second propeller shaft 12, and the ball 24 is connected to the outer periphery of the inner 23. It is configured to be fitted into three grooves 21 </ b> A provided at three positions between the surface and the inner peripheral surface of the outer 21.

第２プロペラシャフト１２のシャフトスタブ２２は、大径部２２Ａから先端部のインナ２３に向けて中径部２２Ｂ、小径部２２Ｃの如くに順に小径化し、小径部２２Ｃに装填したダブルシールドタイプのセンタベアリング２５を介して環状支持部材３０に回転自在に支持されている。   The shaft stub 22 of the second propeller shaft 12 is a double shield type center loaded in the small-diameter portion 22C, with the diameter gradually decreasing from the large-diameter portion 22A toward the inner portion 23 at the distal end, such as the medium-diameter portion 22B and the small-diameter portion 22C. It is rotatably supported by the annular support member 30 via the bearing 25.

環状支持部材３０は、図２に示す如く、鋼等の金属製の内環３１と外環３２をゴム状弾性部材３３を介して接合したものであり、内環３１は大径部３１Ａ、中径部３１Ｂ、縮径側板部３１Ｃの如くに径を変えた円筒状をなし、中径部３１Ｂと縮径側板部３１Ｃの内側に（本実施例では内環３１の内周に設けた弾性部材３３と一体の薄肉ゴム層を介して）センタベアリング２５の外輪２５Ａを嵌合し、大径部３１Ａはシャフトスタブ２２の大径部２２Ａの外周を覆う後方にまで延在している。センタベアリング２５の外輪２５Ａの前端面が内環３１の縮径側板部３１Ｃ（本実施例では内環３１の内周に設けた弾性部材３３と一体の薄肉ゴム層を介して）に当接して位置決めされる。これにより、プロペラシャフト１２のシャフトスタブ２２は、環状支持部材３０によりセンタベアリング２５を介して回転可能に不図示の車体シャシに弾性支持される。   As shown in FIG. 2, the annular support member 30 is formed by joining an inner ring 31 made of metal such as steel and an outer ring 32 via a rubber-like elastic member 33. It has a cylindrical shape with different diameters, such as the diameter portion 31B and the reduced diameter side plate portion 31C, and is provided inside the intermediate diameter portion 31B and the reduced diameter side plate portion 31C (in this embodiment, an elastic member provided on the inner periphery of the inner ring 31). The outer ring 25A of the center bearing 25 is fitted (through a thin rubber layer integral with 33), and the large-diameter portion 31A extends to the rear to cover the outer periphery of the large-diameter portion 22A of the shaft stub 22. The front end surface of the outer ring 25A of the center bearing 25 is in contact with the reduced diameter side plate portion 31C of the inner ring 31 (in this embodiment, through a thin rubber layer integral with the elastic member 33 provided on the inner periphery of the inner ring 31). Positioned. As a result, the shaft stub 22 of the propeller shaft 12 is elastically supported by the vehicle body chassis (not shown) so as to be rotatable via the center bearing 25 by the annular support member 30.

自在継手２０にあっては、環状支持部材３０の内環３１に嵌合されたセンタベアリング２５をシャフトスタブ２２の小径部２２Ｃに装填し、この状態で、シャフトスタブ２２の小径部２２Ｃにストッパピース４０を圧入する。   In the universal joint 20, the center bearing 25 fitted to the inner ring 31 of the annular support member 30 is loaded into the small diameter portion 22 </ b> C of the shaft stub 22, and in this state, the stopper piece is attached to the small diameter portion 22 </ b> C of the shaft stub 22. 40 is press-fitted.

ストッパピース４０は、本実施例ではプレス成形された板材からなり、シャフトスタブ２２の小径部２２Ｃに圧入される内筒部４１と、内筒部４１の前端部から外方に張り出るフランジ４２を有して構成される。   The stopper piece 40 is made of a press-molded plate material in this embodiment, and includes an inner cylinder portion 41 that is press-fitted into the small diameter portion 22C of the shaft stub 22 and a flange 42 that protrudes outward from the front end portion of the inner cylinder portion 41. It is configured.

ストッパピース４０の内筒部４１の後端部は拡径側板部４１Ａとされ、センタベアリング２５の前端面に衝合する。これにより、センタベアリング２５の内輪２５Ｂの後端面がシャフトスタブ２２の中径部２２Ｂの肩面に当接して位置決めされ、内輪２５Ｂの前端面がストッパピース４０の内筒部４１の拡径側板部４１Ａに押圧されて位置決めされる。即ち、プロペラシャフト１２のシャフトスタブ２２に圧入されるストッパピース４０の後端面がセンタベアリング２５の前端面に衝合し、センタベアリング２５をプロペラシャフト１２のシャフトスタブ２２に対して位置決め固定する。   The rear end portion of the inner cylinder portion 41 of the stopper piece 40 is an enlarged diameter side plate portion 41 </ b> A and abuts against the front end surface of the center bearing 25. Thus, the rear end surface of the inner ring 25B of the center bearing 25 is positioned in contact with the shoulder surface of the medium diameter portion 22B of the shaft stub 22, and the front end surface of the inner ring 25B is positioned on the enlarged side plate portion of the inner cylinder portion 41 of the stopper piece 40. 41A is pressed and positioned. That is, the rear end surface of the stopper piece 40 press-fitted into the shaft stub 22 of the propeller shaft 12 abuts with the front end surface of the center bearing 25, and the center bearing 25 is positioned and fixed with respect to the shaft stub 22 of the propeller shaft 12.

ストッパピース４０のフランジ４２の外縁部は後方に開口するＵ字状折曲部４２Ａとされ、環状支持部材３０において、内環３１の内部（内環３１のセンタベアリング２５が嵌合している内部）に通じる前端開口３０Ａを覆う。   The outer edge portion of the flange 42 of the stopper piece 40 is a U-shaped bent portion 42A that opens to the rear, and in the annular support member 30, the inside of the inner ring 31 (inside the center bearing 25 of the inner ring 31 is fitted). The front end opening 30 </ b> A leading to) is covered.

尚、自在継手２０にあっては、アウタ２１とインナ２３の接続空間５０を、金属薄板からなるブーツアダプタ５１とゴム状弾性体からなるブーツ５２を用いて密封し、ボ−ル２４の摺動性、耐久性を向上するためのグリースをこの接続空間５０に封入する。   In the universal joint 20, the connection space 50 between the outer 21 and the inner 23 is sealed using a boot adapter 51 made of a metal thin plate and a boot 52 made of a rubber-like elastic body, and the ball 24 slides. Grease for improving performance and durability is enclosed in the connection space 50.

しかるに、本実施例では、車両進行方向の前方に臨んでいて外水、異物が侵入し易い、センタベアリング２５のシール性を向上するため、以下の構成を具備する。   However, in this embodiment, the following configuration is provided in order to improve the sealing performance of the center bearing 25 that faces the front in the vehicle traveling direction and easily allows external water and foreign matter to enter.

環状支持部材３０における弾性部材３３のプロペラシャフト１２（シャフトスタブ２２）を囲む前面であって、ストッパピース４０のフランジ４２が環状支持部材３０の前端開口３０Ａを覆う位置（フランジ４２のＵ字状折曲部４２Ａの弾性部材３３に相対する後端面位置）よりも軸方向で前方に位置する前面に、シャフトスタブ２２を囲んで環状に張り出る水返し部６０を一体に成形して設ける。   The annular support member 30 is a front surface surrounding the propeller shaft 12 (shaft stub 22) of the elastic member 33, and the position where the flange 42 of the stopper piece 40 covers the front end opening 30A of the annular support member 30 (the U-shaped folding of the flange 42). A water return portion 60 that surrounds the shaft stub 22 and protrudes in an annular shape is integrally formed on the front surface that is positioned forward in the axial direction from the rear end surface position of the curved portion 42 </ b> A facing the elastic member 33.

水返し部６０は、弾性部材３３の前面から前方斜め下向きの水返し面６０Ａを張出し形成する。環状支持部材３０における弾性部材３３の前面に降りかかって垂れ落ちる水の垂れ落ち方向Ａ（図１、図２）を、水返し部６０の水返し面６０Ａにより、環状支持部材３０の前端開口３０Ａよりも軸方向で前方に向かう方向に制御する。   The water return portion 60 projects and forms a water return surface 60 </ b> A that is diagonally forward and downward from the front surface of the elastic member 33. The front end opening 30 </ b> A of the annular support member 30 is caused to fall in the direction A (FIG. 1, FIG. 2) of the water falling on the front surface of the elastic member 33 in the annular support member 30 by the water return surface 60 </ b> A of the water return portion 60. The direction is controlled in the forward direction in the axial direction.

環状支持部材３０における弾性部材３３は、ストッパピース４０のフランジ４２と相対してセンタベアリング２５をシールするシールリップ７０を一体に成形して備える。本実施例のシールリップ７０は、フランジ４２のＵ字状折曲部４２Ａの外径後端面と隙間Ｇ1を介して相対する大径リップ７１と、大径リップ７１の内周側からフランジ４２のＵ字状折曲部４２ＡのＵ字状凹部に隙間Ｇ2を介して侵入する小径リップ７２とを有する。ストッパピース４０のＵ字状折曲部４２Ａの外径後端面がシールリップ７０の大径リップ７１に相対する隙間が、環状支持部材３０の本発明における前端開口３０Ａになる。ストッパピース４０のフランジ４２のＵ字状折曲部４２Ａとシールリップ７０の大径リップ７１、小径リップ７２とは、環状支持部材３０の前端開口３０Ａにラビリンス隙間Ｇ1、Ｇ2を形成し、内環３１の内部、ひいてはセンタベアリング２５への水の浸入、異物の侵入を防止する。   The elastic member 33 in the annular support member 30 is integrally provided with a seal lip 70 that seals the center bearing 25 facing the flange 42 of the stopper piece 40. The seal lip 70 of the present embodiment includes a large-diameter lip 71 facing the outer-diameter rear end face of the U-shaped bent portion 42A of the flange 42 via a gap G1, and the flange 42 from the inner peripheral side of the large-diameter lip 71. A small-diameter lip 72 that enters the U-shaped concave portion of the U-shaped bent portion 42A through the gap G2. A gap where the outer diameter rear end surface of the U-shaped bent portion 42 </ b> A of the stopper piece 40 faces the large diameter lip 71 of the seal lip 70 becomes the front end opening 30 </ b> A of the annular support member 30 in the present invention. The U-shaped bent portion 42A of the flange 42 of the stopper piece 40 and the large-diameter lip 71 and the small-diameter lip 72 of the seal lip 70 form labyrinth gaps G1 and G2 in the front end opening 30A of the annular support member 30, and the inner ring Intrusion of water into the interior of 31 and thus the center bearing 25 and entry of foreign matter are prevented.

本実施例によれば以下の作用効果を奏する。
(a)環状支持部材３０における弾性部材３３のプロペラシャフト１２を囲む前面であって、ストッパピース４０のフランジ４２が環状支持部材３０の前端開口３０Ａを覆う位置よりも軸方向で前方に位置する前面に、プロペラシャフト１２を囲む環状の水返し部６０を設けた。従って、車両の前方（車両の前進方向）から吹き付ける泥水等の水が、環状支持部材３０における弾性部材３３の前面に降りかけられて垂れ落ちる過程で、その垂れ落ち方向を水返し部６０により環状支持部材３０の前端開口３０Ａよりも軸方向で前方に向かうように制御する。これにより、環状支持部材３０の前端開口３０Ａから内環３１の内部への水の浸入をその前端開口３０Ａよりも手前で遮断し、内環３１の内部への水の浸入を十分に防止できる。これにより、内環３１の内周にダストシールを取着することなく、センタベアリング２５のシール性を向上できる。 According to the present embodiment, the following operational effects can be obtained.
(a) Front surface surrounding the propeller shaft 12 of the elastic member 33 in the annular support member 30, and the front surface in which the flange 42 of the stopper piece 40 is positioned forward in the axial direction from the position covering the front end opening 30 </ b> A of the annular support member 30. In addition, an annular water return portion 60 surrounding the propeller shaft 12 was provided. Accordingly, in the process in which muddy water or the like sprayed from the front of the vehicle (the forward direction of the vehicle) falls on the front surface of the elastic member 33 in the annular support member 30 and hangs down, the sag direction is circularized by the water return portion 60. Control is performed so as to be directed forward in the axial direction from the front end opening 30 </ b> A of the support member 30. Thereby, the entrance of water from the front end opening 30A of the annular support member 30 to the inside of the inner ring 31 is blocked before the front end opening 30A, and the entrance of water to the inside of the inner ring 31 can be sufficiently prevented. Thereby, the sealing performance of the center bearing 25 can be improved without attaching a dust seal to the inner periphery of the inner ring 31.

(b)水返し部６０が前記弾性部材３３の前面から前方斜め下向きの水返し面６０Ａを張出し形成した。従って、環状支持部材３０における弾性部材３３の前面に降りかけられて垂れ落ちる水の垂れ落ち方向を、水返し部６０の前方斜め下向きの水返し面６０Ａにより、環状支持部材３０の前端開口３０Ａよりも前方に向かう方向に一層確実に制御し、内環３１の内部への水の浸入を一層十分に防止できる。   (b) The water return portion 60 is formed by projecting a water return surface 60 </ b> A obliquely forward and downward from the front surface of the elastic member 33. Accordingly, the dripping direction of the water that falls on the front surface of the elastic member 33 in the annular support member 30 is caused by the water return surface 60 </ b> A obliquely downward and forward from the front end opening 30 </ b> A of the annular support member 30. In addition, it is possible to control more reliably in the forward direction, and to prevent water from entering the inner ring 31 more sufficiently.

(c)環状支持部材３０の弾性部材３３がストッパピース４０のフランジ４２と相対してセンタベアリング２５をシールするシールリップ７０を一体に備えた。従って、水返し部６０の存在にもかかわらず、ストッパピース４０のフランジ４２が覆う環状支持部材３０の前端開口３０Ａの側へ回り込んだ水の浸入、異物の侵入を、弾性部材３３が一体に備えるシールリップ７０により確実に遮断できる。内環３１の内部、ひいてはセンタベアリング２５を外部空間に対して完全にシールするものになる。   (c) The elastic member 33 of the annular support member 30 is integrally provided with a seal lip 70 that seals the center bearing 25 against the flange 42 of the stopper piece 40. Therefore, in spite of the presence of the water return portion 60, the elastic member 33 integrally integrates the intrusion of water and the entry of foreign matter that have entered the side of the front end opening 30 </ b> A of the annular support member 30 covered by the flange 42 of the stopper piece 40. The sealing lip 70 provided can surely cut off. The inside of the inner ring 31 and thus the center bearing 25 is completely sealed from the outer space.

（実施例２）（図３）
図３に示す実施例２が実施例１と異なる点は、環状支持部材３０の弾性部材３３に設けられる水返し部６０が、弾性部材３３のプロペラシャフト１２（シャフトスタブ２２）を囲む前面の最も前方位置に設けられたことにある。 (Example 2) (FIG. 3)
3 differs from the first embodiment in that the water return portion 60 provided on the elastic member 33 of the annular support member 30 is the most on the front surface surrounding the propeller shaft 12 (shaft stub 22) of the elastic member 33. It exists in the front position.

本実施例によれば、環状支持部材３０における弾性部材３３の前面に降りかけられて垂れ落ちる水の垂れ落ちを、環状支持部材３０の前端開口３０Ａよりも一層手前に配置した水返し部６０で遮断し、内環３１の内部への水の浸入を一層十分に防止できる。   According to the present embodiment, with the water return portion 60 disposed on the front side of the front end opening 30 </ b> A of the annular support member 30, the dripping of the water that falls on the front surface of the elastic member 33 in the annular support member 30 and droops. By blocking, water can be more sufficiently prevented from entering the inner ring 31.

（実施例３）（図４）
図４に示す実施例３が実施例１と異なる点は、環状支持部材３０の弾性部材３３のプロペラシャフト１２（シャフトスタブ２２）を囲む前面の複数位置（プロペラシャフト１２の軸方向に沿う複数位置）、本実施例では２位置に水返し部６０、６１（水返し部６１も弾性部材３３の前面から前方斜め下向きの水返し面６１Ａを張出し成形されている）を設けたことにある。 (Example 3) (FIG. 4)
The third embodiment shown in FIG. 4 differs from the first embodiment in that a plurality of positions on the front surface surrounding the propeller shaft 12 (shaft stub 22) of the elastic member 33 of the annular support member 30 (a plurality of positions along the axial direction of the propeller shaft 12). In this embodiment, the water return portions 60 and 61 (the water return portion 61 is also formed with a water return surface 61A extending obliquely forward and downward from the front surface of the elastic member 33) at two positions.

本実施例によれば、環状支持部材３０における弾性部材３３の前面に降りかけられて垂れ落ちる水の垂れ落ちを、環状支持部材３０の前端開口３０Ａよりも手前で２個の水返し部６０、６１により多段階的に遮断し、内環３１の内部への水の浸入を一層十分に防止できる。   According to the present embodiment, the two water return portions 60, which spill water that falls on the front surface of the elastic member 33 in the annular support member 30 and falls before the front end opening 30 </ b> A of the annular support member 30, It can block | block in multistep by 61 and can prevent the penetration | invasion of the water to the inside of the inner ring 31 more fully.

以上、本発明の実施例を図面により詳述したが、本発明の具体的な構成はこの実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

本発明は、プロペラシャフトの支持構造において、環状支持部材における弾性部材のプロペラシャフトを囲む前面であって、ストッパピースのフランジが環状支持部材の前端開口を覆う位置よりも軸方向で前方に位置する前面に、プロペラシャフトを囲む環状の水返し部を設けた。これにより、プロペラシャフトの支持構造において、ダストシールを用いることなく、センタベアリングのシール性を向上することができる。   In the propeller shaft support structure, the present invention is a front surface surrounding the propeller shaft of the elastic member in the annular support member, and the flange of the stopper piece is positioned forward in the axial direction from the position covering the front end opening of the annular support member. An annular water return portion surrounding the propeller shaft was provided on the front surface. Thereby, in the propeller shaft support structure, the sealability of the center bearing can be improved without using a dust seal.

１２ プロペラシャフト
２５ センタベアリング
３０ 環状支持部材
３０Ａ 前端開口
３１ 内環
３３ 弾性部材
４０ ストッパピース
４２ フランジ
６０、６１ 水返し部
６０Ａ 水返し面
７０ シールリップ 12 propeller shaft 25 center bearing 30 annular support member 30A front end opening 31 inner ring 33 elastic member 40 stopper piece 42 flange 60, 61 water return portion 60A water return surface 70 seal lip

Claims (5)

環状支持部材における弾性部材の内周に備えた内環に、センタベアリングを介してプロペラシャフトを回転自在に支持し、
プロペラシャフトに圧入されるストッパピースがセンタベアリングの端面に衝合し、センタベアリングをプロペラシャフトに対して位置決め固定するとともに、
ストッパピースのフランジが内環の内部に通じる環状支持部材の前端開口を覆ってなるプロペラシャフトの支持構造において、
環状支持部材における弾性部材のプロペラシャフトを囲む前面であって、ストッパピースのフランジが環状支持部材の前端開口を覆う位置よりも軸方向で前方に位置する前面に、プロペラシャフトを囲む環状の水返し部を設けてなることを特徴とするプロペラシャフトの支持構造。 A propeller shaft is rotatably supported via a center bearing on an inner ring provided on the inner periphery of the elastic member in the annular support member,
The stopper piece press-fitted into the propeller shaft abuts the end surface of the center bearing, positioning and fixing the center bearing to the propeller shaft,
In the propeller shaft support structure in which the flange of the stopper piece covers the front end opening of the annular support member leading to the inside of the inner ring,
An annular water return surrounding the propeller shaft on the front surface surrounding the propeller shaft of the elastic member in the annular support member, the front surface of the stopper piece being positioned axially forward from the position where the flange of the stopper piece covers the front end opening of the annular support member Propeller shaft support structure characterized by comprising a portion. 前記水返し部が前記弾性部材の前面から前方斜め下向きの水返し面を張出し形成してなる請求項１に記載のプロペラシャフトの支持構造。   The propeller shaft support structure according to claim 1, wherein the water return portion is formed by projecting a water return surface obliquely downward and forward from the front surface of the elastic member. 前記水返し部が前記弾性部材のプロペラシャフトを囲む前面の最も前方位置に設けられてなる請求項１又は２に記載のプロペラシャフトの支持構造。   The propeller shaft support structure according to claim 1 or 2, wherein the water return portion is provided at a forefront position of a front surface surrounding the propeller shaft of the elastic member. 前記水返し部が前記弾性部材のプロペラシャフトを囲む前面に複数個設けられてなる請求項１〜３のいずれかに記載のプロペラシャフトの支持構造。   The propeller shaft support structure according to claim 1, wherein a plurality of the water return portions are provided on a front surface surrounding the propeller shaft of the elastic member. 前記弾性部材がストッパピースのフランジと相対してセンタベアリングをシールするシールリップを一体に備える請求項１〜４のいずれかに記載のプロペラシャフトの支持構造。   The propeller shaft support structure according to any one of claims 1 to 4, wherein the elastic member is integrally provided with a seal lip that seals the center bearing relative to the flange of the stopper piece.
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EP2544175A1 (en) 2011-04-19 2013-01-09 Sony Corporation Music section detecting apparatus and method, program, recording medium, and music signal detecting apparatus
JP2013064438A (en) * 2011-09-16 2013-04-11 Nok Corp Center bearing support
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JP2015147526A (en) * 2014-02-07 2015-08-20 Nok株式会社 center bearing support
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JPS5070354U (en) * 1973-10-31 1975-06-21
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JP2003097595A (en) * 2001-09-27 2003-04-03 Showa Corp Structure to prevent universal joint boots from water penetration
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Publication number Priority date Publication date Assignee Title
EP2544175A1 (en) 2011-04-19 2013-01-09 Sony Corporation Music section detecting apparatus and method, program, recording medium, and music signal detecting apparatus
JP2013064438A (en) * 2011-09-16 2013-04-11 Nok Corp Center bearing support
CN106321629A (en) * 2011-09-16 2017-01-11 Nok株式会社 Center bearing support
DE102012208055A1 (en) * 2012-05-14 2013-11-14 Schaeffler Technologies AG & Co. KG Bearing arrangement i.e. drive shaft support bearing arrangement, for motor car, has bearings whose outer ring includes sealing element, and pre-sealing units extending closure to bearings and rotational symmetrically running at drive shaft
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JP2015147526A (en) * 2014-02-07 2015-08-20 Nok株式会社 center bearing support
WO2023120222A1 (en) * 2021-12-20 2023-06-29 Nok株式会社 Center bearing support

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