JP2006226510A

JP2006226510A - Bearing

Info

Publication number: JP2006226510A
Application number: JP2005044476A
Authority: JP
Inventors: Takanori Koge; 隆則香下
Original assignee: NAKAHARA KASEIHIN KOGYO KK
Current assignee: NAKAHARA KASEIHIN KOGYO KK
Priority date: 2005-02-21
Filing date: 2005-02-21
Publication date: 2006-08-31

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing with a resin layer lined on the inner face of a bearing member and prevented from being separated from the inner face of the bearing member. <P>SOLUTION: The bearing 10 comprises the metal bearing member 11 and the resin layer 20 lined on the inner face of the bearing member 11. On the inner face of the bearing member 11, a plurality of splines 12 are formed long in the axial direction. The width of an opening of the spline 12 at the inner periphery side of a pipe is smaller than the width of the spline 12 at the corner side. The bearing member 11 has a recessed portion on the inner face running to the peripheral direction of the pipe. The recessed portion is an annular groove running throughout the periphery of the inner face of the pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は各種産業機械に使用される軸受けに関し、詳しくは樹脂層が内面にライニングされた軸受けに関する。 The present invention relates to a bearing used in various industrial machines, and more particularly to a bearing in which a resin layer is lined on the inner surface.

従来、軸に対する磨耗を防止したり、軸との滑りを良くするなどのために、金属製軸受け部材の内面に樹脂をライニングすることが行われている。 Conventionally, resin is lined on the inner surface of a metal bearing member in order to prevent wear on the shaft or improve sliding with the shaft.

しかし、樹脂層の成形収縮、あるいは金属製軸受け部材との線膨張率の相違により、樹脂層が管の中心方向に向けて収縮し剥離する場合がある。また、樹脂層が回転軸からの負荷や衝撃等によって軸受け部材の内面から剥離する場合がある。 However, the resin layer may contract and peel in the direction of the center of the tube due to molding shrinkage of the resin layer or a difference in linear expansion coefficient from the metal bearing member. Further, the resin layer may be peeled off from the inner surface of the bearing member due to a load or impact from the rotating shaft.

従来、例えば、特開平７−１９２５４号公報（特許文献１）では、雌形スプラインシャフトの内面に、軸線方向に延びる凹凸を形成し、この凹凸内面に自己潤滑性樹脂のコーティングを設ける技術が開示されている。 Conventionally, for example, Japanese Patent Laid-Open No. 7-19254 (Patent Document 1) discloses a technique in which irregularities extending in the axial direction are formed on the inner surface of a female spline shaft, and a coating of a self-lubricating resin is provided on the inner surface of the irregularities. Has been.

しかし、このスプラインシャフトは、軸受けとして使用できず、またコーティングが剥離するおそれがある。
特開平７−１９２５４号公報 However, this spline shaft cannot be used as a bearing, and the coating may be peeled off.
Japanese Patent Laid-Open No. 7-19254

本発明は、軸受け部材の内面にライニングした樹脂層が軸受け部材内面から剥離することを防止できる軸受けを提供することを目的とする。 An object of this invention is to provide the bearing which can prevent that the resin layer lined on the inner surface of the bearing member peels from the inner surface of the bearing member.

本発明の軸受けは、金属製軸受け部材と、該軸受け部材の内面にライニングされた樹脂層と、を有する軸受けであって、該軸受け部材の内面に、軸方向に長い複数のスプラインが形成され、該スプラインの軸受け部材の内周側の開口部の幅寸法がスプラインの奥側の幅寸法に比べて小さく形成され、該軸受け部材の内面に軸受け部材の周方向に走る凹部が形成されており、そのことにより上記目的が達成される。 The bearing of the present invention is a bearing having a metal bearing member and a resin layer lined on the inner surface of the bearing member, and a plurality of splines that are long in the axial direction are formed on the inner surface of the bearing member. The width of the opening on the inner peripheral side of the bearing member of the spline is formed smaller than the width of the inner side of the spline, and a recess running in the circumferential direction of the bearing member is formed on the inner surface of the bearing member. This achieves the above object.

一つの実施形態では、前記凹部が、軸受け部材の内面の全周に亘って走る環状溝である。 In one embodiment, the concave portion is an annular groove that runs over the entire circumference of the inner surface of the bearing member.

一つの実施形態では、前記樹脂層が熱硬化性樹脂を硬化させて形成されている。 In one embodiment, the resin layer is formed by curing a thermosetting resin.

本発明の他の軸受けは、金属製軸受け部材と、該軸受け部材の内面にライニングされた樹脂層と、を有する軸受けであって、該軸受け部材の内面に、複数のスプラインが軸方向に向けて形成され、該スプラインの軸受け部材の内周側の開口部の幅寸法がスプラインの奥側の幅寸法に比べて小さく形成され、該軸受け部材の内面に凹凸部が形成されており、そのことにより上記目的が達成される。 Another bearing of the present invention is a bearing having a metal bearing member and a resin layer lined on the inner surface of the bearing member, and a plurality of splines are directed in the axial direction on the inner surface of the bearing member. The width of the opening on the inner peripheral side of the bearing member of the spline is formed smaller than the width of the inner side of the spline, and an uneven portion is formed on the inner surface of the bearing member. The above objective is achieved.

一つの実施形態では、前記樹脂層の内面は平滑に形成されている。 In one embodiment, the inner surface of the resin layer is formed smoothly.

本発明の軸受けにおいては、軸受け部材の内面に、軸方向に長い複数のスプラインが形成されていることにより、軸受け部材の内面にライニングされた樹脂層が軸受けの周方向へ移動することが妨げられ、またスプラインの軸受け部材の内周側の開口部の幅寸法がスプラインの奥側の幅寸法に比べて小さく形成されていることにより、樹脂層の収縮等によって軸受けの半径方向内側へ樹脂層が剥離することが防止され、さらに軸受け部材の内面に軸受け部材の周方向に走る凹部が形成されていることにより、軸受け部材の軸方向への樹脂層の移動が妨げられる。 In the bearing of the present invention, a plurality of splines that are long in the axial direction are formed on the inner surface of the bearing member, thereby preventing the resin layer lined on the inner surface of the bearing member from moving in the circumferential direction of the bearing. Further, since the width of the opening on the inner peripheral side of the bearing member of the spline is formed smaller than the width of the inner side of the spline, the resin layer is formed radially inward of the bearing due to shrinkage of the resin layer or the like. Separation is prevented, and furthermore, the concave portion running in the circumferential direction of the bearing member is formed on the inner surface of the bearing member, thereby preventing the movement of the resin layer in the axial direction of the bearing member.

従って、軸受け内に配置される軸の摺動、回転等によって樹脂層の剥離現象が防止でき、また樹脂層が軸受け部材の軸方向に抜けることによって起こる剥離現象が防止でき、さらに軸受け部材の中心に向かって樹脂層が収縮することによって起こる剥離現象も防止できる。 Therefore, the peeling phenomenon of the resin layer can be prevented by sliding, rotating, etc. of the shaft arranged in the bearing, and the peeling phenomenon caused by the resin layer coming off in the axial direction of the bearing member can be prevented. Further, the center of the bearing member can be prevented. The peeling phenomenon that occurs when the resin layer shrinks toward the surface can also be prevented.

以下に本発明の実施の形態を具体的に説明する。 Embodiments of the present invention will be specifically described below.

図１〜図４に示すように、本実施形態の軸受け１０は、金属製の軸受け部材１１と、該軸受け部材１１の内面にライニングされた樹脂層２０と、を有する。 As shown in FIGS. 1 to 4, the bearing 10 of this embodiment includes a metal bearing member 11 and a resin layer 20 lined on the inner surface of the bearing member 11.

該軸受け部材１１の内面に、５本のスプライン１２が軸方向に向けて形成されている。スプライン１２の本数は、用途やサイズ等によって変更でき、４〜１０が好ましく、特に好ましい本数は５〜８である。このスプライン１２の管（軸受け部材）の内周側の開口部の幅寸法Ｌ１はスプライン１２の奥側の幅寸法Ｌ２に比べて小さく形成されている。このスプライン１２の断面形状は、ほぼ台形に形成されている。 Five splines 12 are formed on the inner surface of the bearing member 11 in the axial direction. The number of splines 12 can be changed depending on the application, size, etc., and is preferably 4 to 10, and particularly preferably 5 to 8. The width L1 of the opening on the inner peripheral side of the pipe (bearing member) of the spline 12 is formed smaller than the width L2 on the back side of the spline 12. The spline 12 has a substantially trapezoidal cross-sectional shape.

このスプライン１２は、軸受け部材１１の内面の軸方向に、スロッター、ブローチ、鍛造、鋳造等を用いて形成することができる。 The spline 12 can be formed in the axial direction of the inner surface of the bearing member 11 by using a slotter, a broach, forging, casting or the like.

また、スプライン１２とは異なる位置において軸受け部材１１の内面に、管の周方向に走る凹部１３が形成されている。この凹部１３としては、管の内面の全周に亘って走る環状溝で形成するのが好ましい。あるいは、軸受け部材１１の内面に凹凸部を形成してもよい。 Moreover, the recessed part 13 which runs in the circumferential direction of a pipe | tube is formed in the inner surface of the bearing member 11 in the position different from the spline 12. FIG. The recess 13 is preferably formed by an annular groove that runs over the entire circumference of the inner surface of the tube. Alternatively, an uneven portion may be formed on the inner surface of the bearing member 11.

環状溝１３の深さは、図１および図２に示すように、スプライン１２の深さより小寸法とされている。環状溝１３の本数は、図２に示すように１本でもよいが、用途や軸受け部材１１のサイズ等によって複数本（例えば、２〜４）形成してもよい。 As shown in FIGS. 1 and 2, the depth of the annular groove 13 is smaller than the depth of the spline 12. The number of the annular grooves 13 may be one as shown in FIG. 2, but a plurality (for example, 2 to 4) may be formed depending on the application, the size of the bearing member 11, and the like.

また、軸受け部材１１の内面に凹凸を形成する場合、スプライン１２が形成されていない軸受け部材１１の内面に、スプライン１２より浅い深さの凹部を一つ以上形成してもよい。 Moreover, when forming an unevenness | corrugation in the inner surface of the bearing member 11, you may form one or more recessed parts of the depth shallower than the spline 12 in the inner surface of the bearing member 11 in which the spline 12 is not formed.

軸受け部材１１の内面にライニングされた樹脂層２０は、熱硬化性樹脂を硬化させて形成されている。熱硬化性樹脂としては、例えば、ベークライト等のフェノールーホルムアルデヒド樹脂、フラン樹脂、エポキシ樹脂、不飽和ポリエステル等があげられる。また、用途に応じて、熱硬化性樹脂に替えて熱可塑性樹脂を用いることもできる。樹脂層２０は、軸受け部材１１（管）の内面に、圧縮成形、射出成形、ブロー成形、押し出し成形などの手段で形成することができる。 The resin layer 20 lined on the inner surface of the bearing member 11 is formed by curing a thermosetting resin. Examples of the thermosetting resin include phenol-formaldehyde resins such as bakelite, furan resins, epoxy resins, and unsaturated polyesters. Further, a thermoplastic resin can be used instead of the thermosetting resin depending on the application. The resin layer 20 can be formed on the inner surface of the bearing member 11 (tube) by means such as compression molding, injection molding, blow molding, and extrusion molding.

この樹脂層２０の内面は平滑に形成されている。つまり、凹凸が形成されていない。 The inner surface of the resin layer 20 is formed smoothly. That is, no irregularities are formed.

従来では、軸受け部材１１の内面に樹脂をライニングする場合、三種類の剥離現象を起こすことが予想された。すなわち、管の内周方向に、回転する方向に剥離する場合、管の軸方向に抜ける方向に剥離する場合、および樹脂の成形収縮および金属との線膨張率の相違により、管中心方向に樹脂ライニングが収縮し、剥離する場合である。 Conventionally, when resin is lined on the inner surface of the bearing member 11, three types of peeling phenomena are expected to occur. That is, when peeling in the inner circumferential direction of the tube, peeling in the axial direction of the tube, and resin in the tube center direction due to molding shrinkage of the resin and the difference in linear expansion coefficient with the metal This is the case when the lining shrinks and peels off.

本発明においては、管の内周方向に回転することによって起きる剥離現象は、スプライン１２によって防止できる。管の軸方向に抜けることによって起こる剥離現象は、凹部あるいは環状溝１３（抜け止め溝）によって防止できる。また、管の中心に向かって樹脂層２０が収縮することによって起こる剥離現象は、スプライン１２のアンダーカットによって防止できる。 In the present invention, the peeling phenomenon caused by rotating in the inner peripheral direction of the pipe can be prevented by the spline 12. The peeling phenomenon caused by the axial removal of the tube can be prevented by the recess or the annular groove 13 (retaining groove). Further, the peeling phenomenon caused by the shrinkage of the resin layer 20 toward the center of the tube can be prevented by the undercut of the spline 12.

図１は本発明の一実施形態の軸受け部材の正面図である。FIG. 1 is a front view of a bearing member according to an embodiment of the present invention. 図２は図１に示す軸受け部材の断面図である。FIG. 2 is a cross-sectional view of the bearing member shown in FIG. 本発明の一実施形態の軸受けの正面図である。It is a front view of the bearing of one embodiment of the present invention. 図４は図３に示す軸受け部材の断面図である。4 is a cross-sectional view of the bearing member shown in FIG.

Explanation of symbols

１０軸受け
１１軸受け部材
１２スプライン
１３凹部
２０樹脂層 10 Bearing 11 Bearing member 12 Spline 13 Recess 20 Resin layer

Claims

A bearing having a metal bearing member and a resin layer lined on the inner surface of the bearing member,
A plurality of splines that are long in the axial direction are formed on the inner surface of the bearing member, and the width dimension of the opening on the inner peripheral side of the bearing member of the spline is formed smaller than the width dimension on the back side of the spline,
The bearing in which the recessed part which runs in the circumferential direction of a bearing member is formed in the inner surface of this bearing member.

The bearing according to claim 1, wherein the recess is an annular groove that runs over the entire circumference of the inner surface of the bearing member.

The bearing according to claim 1, wherein the resin layer is formed by curing a thermosetting resin.

A bearing having a metal bearing member and a resin layer lined on the inner surface of the bearing member,
A plurality of splines are formed on the inner surface of the bearing member in the axial direction, and the width of the opening on the inner peripheral side of the bearing member of the spline is formed smaller than the width of the inner side of the spline.
A bearing in which an uneven portion is formed on the inner surface of the bearing member.

The bearing according to any one of claims 1 to 4, wherein an inner surface of the resin layer is formed smoothly.