JP2008082485A - Rocking bearing - Google Patents

Rocking bearing Download PDF

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Publication number
JP2008082485A
JP2008082485A JP2006264871A JP2006264871A JP2008082485A JP 2008082485 A JP2008082485 A JP 2008082485A JP 2006264871 A JP2006264871 A JP 2006264871A JP 2006264871 A JP2006264871 A JP 2006264871A JP 2008082485 A JP2008082485 A JP 2008082485A
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JP
Japan
Prior art keywords
housing
raceway
bearing
axial direction
bearing ring
Prior art date
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Pending
Application number
JP2006264871A
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Japanese (ja)
Inventor
Shuichi Kajikawa
修一 梶川
Sadatsune Kazama
貞経 風間
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006264871A priority Critical patent/JP2008082485A/en
Publication of JP2008082485A publication Critical patent/JP2008082485A/en
Pending legal-status Critical Current

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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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/50—Other types of ball or roller bearings
    • F16C19/502—Other types of ball or roller bearings with rolling elements in rows not forming a full circle
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent early separation of a bearing ring of a rocking bearing. <P>SOLUTION: An expansion part 6 of not contacting a roller 2 over the total length in the peripheral direction, is arranged on the other end side in the axial direction of the bearing ring 1 having a collar 4 in one end part in the axial direction. A cutout 7 cut out in the axial direction is arranged in this expansion part 6. The early separation of the bearing ring 1 can be prevented, by eliminating part of generating conventional excessive bearing pressure from a raceway surface 1a of the bearing ring 1, by being positioned in a housing 11 of the bearing ring 1, by engaging a pin (an engaging piece) 8 with the cutout 7 of this bearing ring 1 and a pin hole (an engaging recessed part) 13 arranged in a recessed circular arc-shaped part 11a of the housing 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ハウジングに固定される軌道輪の凹円弧状の軌道面に複数のころを配列し、可動部材の凸円弧状部を揺動自在に支持する揺動軸受に関する。   The present invention relates to a rocking bearing in which a plurality of rollers are arranged on a concave arc-shaped raceway surface of a bearing ring fixed to a housing, and a convex arc-shaped portion of a movable member is swingably supported.

建設機械や農業機械等に使用される斜板式の油圧ポンプや油圧モータ等には、斜板等の可動部材を揺動自在に支持する揺動軸受が組み込まれている。この種の揺動軸受の一例を図３（ａ）、（ｂ）に示す（特許文献１参照。）。この揺動軸受は、ハウジング１１に固定される軌道輪１の凹円弧状の軌道面１ａに複数のころ２を保持器３に保持して配列し、その複数のころ２で斜板等の可動部材１２の凸円弧状部１２ａを揺動自在に支持するものである。その軌道輪１は、凸円弧状の外径面１ｂをハウジング１１の凹円弧状部１１ａに当接させ、外径面１ｂの周方向中心位置から垂直に突出させたピン突起５１を、ハウジング１１の凹円弧状部１１ａに設けられたピン穴５２に係合させることにより、ハウジング１１の凹円弧状部１１ａに位置決めされている。
特開２００２−２８６０４１号公報（図２） A swash plate type hydraulic pump, a hydraulic motor, or the like used in construction machinery, agricultural machinery, or the like incorporates a swing bearing that supports a movable member such as a swash plate in a swingable manner. An example of this type of rocking bearing is shown in FIGS. 3A and 3B (see Patent Document 1). In this oscillating bearing, a plurality of rollers 2 are arranged on a concave arc-shaped raceway surface 1 a of a raceway ring 1 fixed to a housing 11 while being held by a cage 3, and the swash plate or the like is movable by the plurality of rollers 2. The convex arcuate portion 12a of the member 12 is supported in a swingable manner. The bearing ring 1 has a pin projection 51, which has a convex arc-shaped outer diameter surface 1 b in contact with a concave arc-shaped portion 11 a of the housing 11 and projects vertically from the circumferential center position of the outer diameter surface 1 b. The concave arc-shaped portion 11a of the housing 11 is positioned by engaging with a pin hole 52 provided in the concave arc-shaped portion 11a.
Japanese Patent Laying-Open No. 2002-286041 (FIG. 2)

ところで、上記の揺動軸受では、そのピン突起５１がエンボス加工により形成されており、これに伴って軌道面１ａに凹部５３が形成されているため、ころ２が軌道面１ａの凹部５３上を転動するときに凹部５３の周縁部に過大な面圧が発生し、軌道輪１の早期剥離を生じる場合がある。   By the way, in the rocking bearing described above, the pin projection 51 is formed by embossing, and accordingly, the recess 53 is formed in the raceway surface 1a, so that the roller 2 moves on the recess 53 of the raceway surface 1a. When rolling, an excessive surface pressure is generated at the peripheral edge of the recess 53, and the raceway ring 1 may be peeled off early.

本発明の課題は、揺動軸受の軌道輪の早期剥離を防止することである。   An object of the present invention is to prevent early separation of a raceway ring of a rocking bearing.

上記の課題を解決するため、本発明は、内径面に凹円弧状の軌道面が設けられ、外径面が凸円弧状に形成された軌道輪と、この軌道輪の軌道面に配列されて転動する複数のころとを備え、前記軌道輪がその外径面をハウジングの凹円弧状部に当接させた状態でハウジングに固定され、前記複数のころで可動部材の凸円弧状部を揺動自在に支持する揺動軸受において、前記軌道輪の少なくとも一方の軸方向端部を軸方向に拡張して前記ころと接触しない拡張部を設け、この拡張部に軸方向に切れ込む切欠きを設けて、前記軌道輪の切欠きと前記ハウジングの凹円弧状部に設けられた係合凹部とに係合片を係合させることにより、前記軌道輪が前記ハウジングの凹円弧状部に位置決めされるようにした構成を採用した。   In order to solve the above-described problems, the present invention provides a raceway having a concave arc-shaped raceway surface on an inner diameter surface and an outer diameter surface formed in a convex arc shape, and is arranged on the raceway surface of the raceway. A plurality of rolling rollers, and the race is fixed to the housing with an outer diameter surface thereof in contact with the concave arc-shaped portion of the housing, and the convex arc-shaped portion of the movable member is formed by the plurality of rollers. In a swing bearing that is swingably supported, at least one axial end of the bearing ring is extended in the axial direction to provide an extended portion that does not contact the roller, and a notch that cuts in the axial direction is provided in the extended portion. And the engagement ring is engaged with a notch of the bearing ring and an engagement recess provided in the concave arc-shaped portion of the housing, so that the race ring is positioned on the concave arc-shaped portion of the housing. The configuration was adapted.

すなわち、軌道輪の軸方向端部にころと接触しない軸方向拡張部を設けて、この拡張部に軸方向に切れ込む切欠きを設け、この切欠きとハウジングの凹円弧状部の係合凹部とに係合片を係合させて、軌道輪のハウジングへの位置決めを行うようにすることにより、軌道輪の軌道面から従来のような過大な面圧が発生する部位をなくして、軌道輪の早期剥離を防止できるようにしたのである。   That is, an axial extension portion that does not contact the roller is provided at the axial end portion of the race, and a notch that cuts in the axial direction is provided in the extension portion. The notch and the engagement concave portion of the concave arc-shaped portion of the housing By engaging the engagement piece to the bearing ring and positioning the bearing ring to the housing, the portion of the bearing ring where excessive surface pressure is generated is eliminated from the raceway surface of the bearing ring. It was made possible to prevent early peeling.

ここで、前記軌道輪の軸方向一端部に前記ころの軸方向移動を規制する鍔を設ける場合は、前記軌道輪の軸方向他端部を周方向全長にわたって拡張して前記拡張部を設けるようにすれば、軌道輪が製作しやすくなる。   Here, in the case where a hook that restricts the axial movement of the roller is provided at one axial end of the race, the other end in the axial direction of the race is extended over the entire length in the circumferential direction to provide the extension. This makes it easier to manufacture the race.

本発明の揺動軸受は、上述したように、軌道輪の軸方向端部に、ころが転動する領域を避けて、ハウジングへの位置決め用の切欠きを設けたものであるから、軌道面から従来のような過大な面圧が発生する部位をなくすことができ、軌道輪の早期剥離を防止することができる。   As described above, the rocking bearing of the present invention is provided with a notch for positioning to the housing at the axial end of the bearing ring so as to avoid the region where the roller rolls. Therefore, the site where excessive surface pressure is generated as in the prior art can be eliminated, and early separation of the raceway can be prevented.

以下、図１および図２に基づき、本発明の実施形態を説明する。この揺動軸受は、図１（ａ）に示すように、内径面に凹円弧状の軌道面１ａが設けられ、外径面１ｂが凸円弧状に形成された軌道輪１と、軌道輪１の軌道面１ａに配列されて転動する複数のころ２と、これらのころ２を転動自在に保持する保持器３とからなり、軌道輪１がその外径面１ｂをハウジング１１の凹円弧状部１１ａに当接させた状態でハウジング１１に固定され、複数のころ２で可動部材１２の凸円弧状部１２ａを揺動自在に支持するようになっている。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1 (a), this oscillating bearing has a raceway ring 1 in which a concave arc-shaped raceway surface 1a is provided on an inner diameter surface and an outer diameter surface 1b is formed in a convex arc shape, and a raceway ring 1 A plurality of rollers 2 which are arranged on the raceway surface 1a and roll, and a cage 3 which holds these rollers 2 so that they can roll. The raceway ring 1 has an outer diameter surface 1b which is a concave circle of the housing 11. It is fixed to the housing 11 in contact with the arcuate portion 11a, and the plurality of rollers 2 support the convex arcuate portion 12a of the movable member 12 in a swingable manner.

図１（ｂ）および図２に示すように、前記軌道輪１は、鋼板のプレス成形品で、軌道面１ａの軸方向一端部に、ころ２の軸方向移動を規制する鍔４がフランジ曲げ加工で形成されており、軌道面１ａの周方向両端部には、保持器３の揺動を規制するストッパ５が曲げ加工で形成されている。また、その軸方向他端部は周方向全長にわたって軸方向に拡張され、ころ２と接触しない拡張部６が設けられている。そして、この拡張部６に、軸方向に切れ込む半円形の切欠き７が設けられている。   As shown in FIGS. 1B and 2, the race 1 is a press-formed product of a steel plate, and a flange 4 that restricts axial movement of the roller 2 is flange-bent at one end of the raceway surface 1 a in the axial direction. The stopper 5 which controls the rocking | fluctuation of the holder | retainer 3 is formed by the bending process in the circumferential direction both ends of the track surface 1a. Further, the other end portion in the axial direction is extended in the axial direction over the entire length in the circumferential direction, and an extended portion 6 that does not contact the roller 2 is provided. The extended portion 6 is provided with a semicircular cutout 7 cut in the axial direction.

また、図２に示すように、ハウジング１１の凹円弧状部１１ａには、軌道輪１の切欠き７に対応する位置に円形のピン穴（係合凹部）１３が設けられている。そして、軌道輪１の切欠き７とハウジング１１のピン穴１３とに円筒形のピン（係合片）８が係合することにより、軌道輪１がハウジング１１の凹円弧状部１１ａに位置決めされ、周方向の動きを規制されている。   As shown in FIG. 2, a circular pin hole (engagement recess) 13 is provided in the concave arcuate portion 11 a of the housing 11 at a position corresponding to the notch 7 of the race 1. A cylindrical pin (engaging piece) 8 is engaged with the notch 7 of the bearing ring 1 and the pin hole 13 of the housing 11, whereby the bearing ring 1 is positioned on the concave arcuate portion 11 a of the housing 11. The movement in the circumferential direction is regulated.

この揺動軸受は、上記の構成であり、軌道輪１の軸方向端部に、ころ２が転動する領域を避けて、ハウジング１１への位置決め用の切欠き７を設けたので、軌道面１ａに従来のような過大な面圧が発生する部位がなく、軌道輪１の早期剥離を生じるおそれが少ない。   This rocking bearing has the above-described configuration, and the notch 7 for positioning to the housing 11 is provided at the axial end of the bearing ring 1 so as to avoid the region where the roller 2 rolls. There is no portion in 1a where excessive surface pressure is generated as in the prior art, and there is little risk of causing early separation of the race 1.

なお、上述した実施形態では、軌道輪を製作しやすくするために、軸方向一端部に鍔を有する軌道輪の軸方向他端部を周方向全長にわたって拡張し、この拡張部に切欠きを設けるようにしたが、例えば、軌道輪両端部に鍔と周方向の一部で軸方向に張り出す拡張部とを設けて、各拡張部に切欠きを設ける等、切欠きがころ転動領域を避けて設けられれば、拡張部や切欠きの位置や形状については種々変更が可能である。   In the above-described embodiment, in order to make it easy to manufacture the race, the other end in the axial direction of the race having a flange on one end in the axial direction is extended over the entire length in the circumferential direction, and a notch is provided in the extension. However, for example, notches are provided on both ends of the bearing ring, and extended portions projecting in the axial direction in a part of the circumferential direction, and notches are provided in each extended portion. If provided so as to be avoided, various changes can be made to the position and shape of the extended portion and the notch.

ａは実施形態の揺動軸受の縦断正面図、ｂはａのＩ−Ｉ線に沿った横断平面図a is a longitudinal front view of the rocking bearing of the embodiment, b is a cross-sectional plan view taken along line II of a. 図１の軌道輪の位置決め方法を説明する分解斜視図FIG. 1 is an exploded perspective view for explaining a method of positioning the bearing ring of FIG. ａは従来の揺動軸受の縦断正面図、ｂはａの軌道輪の斜視図a is a longitudinal front view of a conventional rocking bearing, and b is a perspective view of a bearing ring of a.

符号の説明Explanation of symbols

１ 軌道輪
１ａ 軌道面
１ｂ 外径面
２ ころ
３ 保持器
４ 鍔
５ ストッパ
６ 拡張部
７ 切欠き
８ ピン（係合片）
１１ ハウジング
１１ａ 凹円弧状部
１２ 可動部材
１２ａ 凸円弧状部
１３ ピン穴（係合凹部） DESCRIPTION OF SYMBOLS 1 Race ring 1a Raceway surface 1b Outer surface 2 Roller 3 Cage 4 Reed 5 Stopper 6 Expansion part 7 Notch 8 Pin (engagement piece)
11 Housing 11a Concave arc-shaped part 12 Movable member 12a Convex arc-shaped part 13 Pin hole (engagement concave part)

Claims (2)

内径面に凹円弧状の軌道面が設けられ、外径面が凸円弧状に形成された軌道輪と、この軌道輪の軌道面に配列されて転動する複数のころとを備え、前記軌道輪がその外径面をハウジングの凹円弧状部に当接させた状態でハウジングに固定され、前記複数のころで可動部材の凸円弧状部を揺動自在に支持する揺動軸受において、前記軌道輪の少なくとも一方の軸方向端部を軸方向に拡張して前記ころと接触しない拡張部を設け、この拡張部に軸方向に切れ込む切欠きを設けて、前記軌道輪の切欠きと前記ハウジングの凹円弧状部に設けられた係合凹部とに係合片を係合させることにより、前記軌道輪が前記ハウジングの凹円弧状部に位置決めされるようにしたことを特徴とする揺動軸受。   A raceway having a concave arc-shaped raceway surface on an inner diameter surface, and a raceway having an outer diameter surface formed in a convex arc shape, and a plurality of rollers arranged and rolled on the raceway surface of the raceway, the raceway In the rocking bearing in which the ring is fixed to the housing in a state where the outer diameter surface thereof is in contact with the concave arc-shaped portion of the housing, and the convex arc-shaped portion of the movable member is swingably supported by the plurality of rollers, An at least one axial end portion of the bearing ring is extended in the axial direction to provide an extension portion that does not contact the roller, and a notch that cuts in the axial direction is provided at the extension portion so that the notch of the race ring and the housing An oscillating bearing characterized in that the bearing ring is positioned on the concave arcuate portion of the housing by engaging an engagement piece with an engaging recess provided in the concave arcuate portion of the housing. . 前記軌道輪の軸方向一端部に前記ころの軸方向移動を規制する鍔を設けるとともに、前記軌道輪の軸方向他端部を周方向全長にわたって拡張して前記拡張部を設けたことを特徴とする請求項１に記載の揺動軸受。   In addition to providing a flange for restricting the axial movement of the roller at one end in the axial direction of the race, and extending the other end in the axial direction of the race over the entire circumferential length, the extension is provided. The rocking bearing according to claim 1.
JP2006264871A 2006-09-28 2006-09-28 Rocking bearing Pending JP2008082485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006264871A JP2008082485A (en) 2006-09-28 2006-09-28 Rocking bearing

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Application Number Priority Date Filing Date Title
JP2006264871A JP2008082485A (en) 2006-09-28 2006-09-28 Rocking bearing

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JP2008082485A true JP2008082485A (en) 2008-04-10

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JP2006264871A Pending JP2008082485A (en) 2006-09-28 2006-09-28 Rocking bearing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096196A (en) * 2008-10-14 2010-04-30 Ntn Corp Rocking bearing
CN109026985A (en) * 2018-10-22 2018-12-18 河北富特来轴承科技有限公司 Crescent moon bearing waves component and hydraulic pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096196A (en) * 2008-10-14 2010-04-30 Ntn Corp Rocking bearing
CN109026985A (en) * 2018-10-22 2018-12-18 河北富特来轴承科技有限公司 Crescent moon bearing waves component and hydraulic pump

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