JP5703955B2 - Rolling bearing unit with mounting plate - Google Patents

Rolling bearing unit with mounting plate Download PDF

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Publication number
JP5703955B2
JP5703955B2 JP2011110925A JP2011110925A JP5703955B2 JP 5703955 B2 JP5703955 B2 JP 5703955B2 JP 2011110925 A JP2011110925 A JP 2011110925A JP 2011110925 A JP2011110925 A JP 2011110925A JP 5703955 B2 JP5703955 B2 JP 5703955B2
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Japan
Prior art keywords
outer ring
mounting plate
rolling bearing
axial direction
width dimension
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JP2012241764A (en
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伊藤　大
大 伊藤
隆朗 加藤木
隆朗 加藤木
朋治 杉万
朋治 杉万
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NSK Ltd
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NSK Ltd
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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
    • 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
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the housing
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • 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

Description

この発明は、例えば自動車用変速機（手動変速機及び自動変速機）を構成する回転軸の端部を、この自動車用変速機の構成部品を収納するハウジングの内面に回転自在に支持する為の回転支持装置を構成する、取付板付転がり軸受ユニットの改良に関する。   The present invention is, for example, for rotatably supporting an end portion of a rotating shaft constituting an automobile transmission (manual transmission and automatic transmission) on an inner surface of a housing for housing components of the automobile transmission. The present invention relates to an improvement of a rolling bearing unit with a mounting plate constituting a rotation support device.

図５は、従来から知られている回転支持装置の１例を示している。自動車用変速機を構成する回転軸１の端部は、ラジアル転がり軸受２により、保持部材であるハウジング３の内面に回転自在に支持されている。このラジアル転がり軸受２は、内周面に外輪軌道４を有する外輪５と、外周面に内輪軌道６を有し、この外輪５と同心に配置した内輪７と、これら外輪軌道４と内輪軌道６との間に転動自在に設けた、それぞれが転動体である、複数個の玉８、８とを備える。尚、これら各玉８、８は、円周方向に関して凡そ等間隔に配置された状態で、保持器９（図６〜７参照）に、転動自在に保持されている。又、前記ハウジング３の内面には、円形の保持凹部１０を設け、この保持凹部１０に前記ラジアル転がり軸受２の外輪５を内嵌している。又、このラジアル転がり軸受２の内輪７に前記回転軸１の端部を内嵌している。更に、取付板１１により、前記外輪５を前記保持凹部１０の奥部に向け抑え付けて、この外輪５がこの保持凹部１０から抜け出す事を防止している。   FIG. 5 shows an example of a conventionally known rotation support device. An end portion of the rotating shaft 1 constituting the automobile transmission is rotatably supported by an inner surface of a housing 3 as a holding member by a radial rolling bearing 2. The radial rolling bearing 2 has an outer ring 5 having an outer ring raceway 4 on an inner peripheral surface, an inner ring raceway 6 on an outer peripheral surface, an inner ring 7 disposed concentrically with the outer ring 5, and the outer ring raceway 4 and the inner ring raceway 6. And a plurality of balls 8, 8 each of which is a rolling element. Each of the balls 8 and 8 is rotatably held by a cage 9 (see FIGS. 6 to 7) in a state of being arranged at approximately equal intervals in the circumferential direction. A circular holding recess 10 is provided on the inner surface of the housing 3, and the outer ring 5 of the radial rolling bearing 2 is fitted into the holding recess 10. Further, the end of the rotary shaft 1 is fitted into the inner ring 7 of the radial rolling bearing 2. Further, the outer ring 5 is pressed against the inner part of the holding recess 10 by the mounting plate 11 to prevent the outer ring 5 from coming out of the holding recess 10.

前記ラジアル転がり軸受２と前記取付板１１とは、例えば特許文献１〜３等に記載されて従来から知られている様に、図６〜７に示す様な取付板付転がり軸受ユニット１２として、前記保持凹部１０への組み付け作業を容易に行える様にしている。この為に、前記外輪５の軸方向一端部外周面に、この外輪５の外径よりも小径の小径段部１３を、全周に亙って形成し、この小径段部１３に前記取付板１１の中心部に形成した円形の嵌合孔１４を、この外輪５に対する回転を可能に外嵌して、前記取付板付転がり軸受ユニット１２としている。この様な取付板付転がり軸受ユニット１２は前記ハウジング３内に、前記外輪５を前記保持凹部１０に内嵌すると共に、前記取付板１１の片面を前記ハウジング３の片面に突き当てた状態に組み付ける。そして、この取付板１１を前記外輪５に対し回転させる事で、この取付板１１の外径寄り部分に形成した、特許請求の範囲に記載した取付孔である通孔１５、１５と、前記ハウジング３の内面に開口したねじ孔（図示省略）とを整合させる。次いで、これら各通孔１５、１５を挿通したねじ（ボルトを含む。本明細書及び特許請求の範囲全体で同じ。）をこれら各ねじ孔に螺合し、更に締め付ける。前記取付板１１の外径寄り部分に、前記各通孔１５、１５に代えてねじ孔を形成し、前記ハウジング３に形成した通孔を外から挿通したねじを、このねじ孔に螺合し、更に締め付ける構造もある。何れの構造であっても、ねじの締め付けにより、取付板１１は、小径段部１３の軸方向奥端部に設けられた段差面１６に突き当たり、更に前記外輪５を前記保持凹部１０の奥部に向け抑え付ける。   The radial rolling bearing 2 and the mounting plate 11 are, for example, as described in Patent Documents 1 to 3 and the like, as known from the past, as the rolling bearing unit 12 with a mounting plate as shown in FIGS. The assembling work to the holding recess 10 can be easily performed. For this purpose, a small-diameter step portion 13 having a smaller diameter than the outer diameter of the outer ring 5 is formed on the outer peripheral surface of one end portion in the axial direction of the outer ring 5 over the entire circumference, and the mounting plate is attached to the small-diameter step portion 13. A circular fitting hole 14 formed at the center of 11 is fitted so as to be able to rotate with respect to the outer ring 5 to form the rolling bearing unit 12 with a mounting plate. Such a rolling bearing unit 12 with a mounting plate is assembled in the housing 3 so that the outer ring 5 is fitted in the holding recess 10 and one side of the mounting plate 11 is abutted against one side of the housing 3. Then, by rotating the mounting plate 11 with respect to the outer ring 5, the through holes 15 and 15 as mounting holes described in the claims formed in a portion near the outer diameter of the mounting plate 11, and the housing 3 is aligned with a screw hole (not shown) opened on the inner surface. Next, screws (including bolts, which are the same throughout the present specification and claims) inserted through the through holes 15 and 15 are screwed into the screw holes and further tightened. A screw hole is formed in a portion near the outer diameter of the mounting plate 11 in place of the through holes 15, 15, and a screw inserted through the through hole formed in the housing 3 is screwed into the screw hole. There is also a structure to tighten. In any structure, by tightening the screw, the mounting plate 11 abuts against the step surface 16 provided at the axially inner end of the small diameter step portion 13, and further the outer ring 5 is connected to the inner portion of the holding recess 10. Hold it down.

上述の様な取付板付転がり軸受ユニット１２を前記ハウジング３に組み付けるには、前記外輪５を前記保持凹部１０に締り嵌めで内嵌すると共に、前記取付板１１を前記ハウジング３にねじ止め固定する。締り嵌めで内嵌する理由は、前記ラジアル転がり軸受２により前記回転軸１を前記ハウジング３に対し、がたつきなく、且つ、この回転軸１に加わるラジアル荷重を確実に支承できる様に支持する為に必要である。但し、前記外輪５が軸受鋼等の鉄系合金製であるのに対して、前記ハウジング３はアルミニウム系合金である場合が多い。鉄系合金の線膨張係数はアルミニウム系合金の線膨張係数よりも小さい。この為、温度上昇時には、前記保持凹部１０に対する前記外輪５の締め代が、低下乃至は喪失する可能性がある。この結果、何らの対策も施さないと、この外輪５が前記保持凹部１０の内側で回転する、クリープが発生する。そして、このクリープが発生すると、この保持凹部１０の内周面が磨耗し、前記締め代が完全に喪失して、この保持凹部１０内で前記外輪５ががたつき、前記回転軸１の回転に伴って振動が発生する等の不都合が発生する可能性がある。   In order to assemble the rolling bearing unit 12 with the mounting plate as described above to the housing 3, the outer ring 5 is fitted into the holding recess 10 with an interference fit, and the mounting plate 11 is fixed to the housing 3 with screws. The reason for the internal fitting by the interference fit is that the radial rolling bearing 2 supports the rotary shaft 1 so that the rotary shaft 1 does not rattle against the housing 3 and the radial load applied to the rotary shaft 1 can be reliably supported. It is necessary for this purpose. However, while the outer ring 5 is made of an iron-based alloy such as bearing steel, the housing 3 is often an aluminum-based alloy. The linear expansion coefficient of the iron-based alloy is smaller than that of the aluminum-based alloy. For this reason, when the temperature rises, the allowance for tightening the outer ring 5 with respect to the holding recess 10 may be reduced or lost. As a result, if no countermeasure is taken, creep occurs in which the outer ring 5 rotates inside the holding recess 10. When this creep occurs, the inner peripheral surface of the holding recess 10 is worn, the fastening margin is completely lost, the outer ring 5 rattles in the holding recess 10, and the rotation of the rotating shaft 1. As a result, there is a possibility that inconvenience such as vibration occurs.

この様な不都合が発生するのを防止する為に、前記取付板１１を前記小径段部１３に、締り嵌めで外嵌固定する事が考えられる。この取付板１１は、前記外輪５と同じ鉄系合金製であるから、これら両部材１１、５の熱膨張量の差を僅少に抑えられ、温度上昇時にも、互いの嵌合部の締め代を十分に確保できる。又、前記取付板１１は、前記ハウジング３に対しねじ止め固定される。従って、温度上昇時にも、前記外輪５が前記保持凹部１０内でクリープする事を防止できる。   In order to prevent the occurrence of such inconvenience, it can be considered that the mounting plate 11 is externally fixed to the small diameter step portion 13 by an interference fit. Since the mounting plate 11 is made of the same iron-based alloy as the outer ring 5, the difference in thermal expansion between the two members 11 and 5 can be suppressed to a small extent, and even when the temperature rises, the tightening margin of the mutual fitting portion is reduced. Can be secured sufficiently. The mounting plate 11 is fixed to the housing 3 with screws. Therefore, it is possible to prevent the outer ring 5 from creeping in the holding recess 10 even when the temperature rises.

但し、前記取付板１１を前記小径段部１３に締り嵌めで外嵌固定すると、この取付板１１を前記ハウジング３にねじ止め固定する作業が面倒になる。即ち、このねじ止め固定の際には、前記取付板１１側に設けた各通孔１５、１５若しくはねじ孔と、前記ハウジング３側に設けたねじ孔若しくは通孔とを整合させる必要がある。前記外輪５を前記保持凹部１０に締り嵌めで内嵌しつつ、前記各孔同士を整合させる事は面倒であり、取付板付転がり軸受ユニットを組み込んだ自動車用変速機等の組立コストが嵩む原因となる。   However, when the mounting plate 11 is externally fixed to the small-diameter step portion 13 by an interference fit, the work of fixing the mounting plate 11 to the housing 3 with screws is troublesome. That is, at the time of fixing with screws, it is necessary to align the through holes 15, 15 or screw holes provided on the mounting plate 11 side with the screw holes or through holes provided on the housing 3 side. While fitting the outer ring 5 into the holding recess 10 with an interference fit, it is troublesome to align the holes with each other, which causes an increase in assembly cost of an automobile transmission incorporating a rolling bearing unit with a mounting plate. Become.

特表２００７−５０４４１２号公報Special table 2007-50412 gazette 特開２００９−０３０７９４号公報JP 2009-030794 A ドイツ国特許公開公報、ＤＥ１０１５３４４１Ａ１German Patent Publication, DE 101 53 441 A1

本発明は、上述の様な事情に鑑みて、ラジアル転がり軸受を構成する外輪を、ハウジング等の保持部材に設けた保持凹部に締り嵌めで内嵌固定する構造を前提として、クリープ防止と組立作業の容易化とを両立できる構造を実現すべく発明したものである。   In view of the circumstances as described above, the present invention is based on the premise of a structure in which an outer ring constituting a radial rolling bearing is internally fitted and fixed to a holding recess provided in a holding member such as a housing, to prevent creep and to perform assembly work. The invention was invented to realize a structure that can achieve both of the above-mentioned ease.

本発明の取付板付転がり軸受ユニットは、前述した従来から知られている取付板付転がり軸受ユニットと同様に、小径段部及び段差面を備えたラジアル転がり軸受と、取付板とを備える。
又、本発明の場合、前記ラジアル転がり軸受を、自動車用変速機に組み込まれ、この自動車用変速機を構成する回転方向が一定である回転軸を支持する為のものとしている。又、前記ラジアル転がり軸受は、内周面に外輪軌道を有し、軸方向両端部が開口した円筒状の外輪と、外周面に内輪軌道を有し、この外輪と同心に配置され、前記回転軸に外嵌される内輪と、これら外輪軌道と内輪軌道との間に転動自在に設けられた複数個の転動体とを備えたものとし、前記外輪の軸方向一端部外周面に、この外輪の外径よりも小径の小径段部、及び、この小径段部の軸方向奥端部に設けられた段差面を形成したものとしている。
特に、本発明の場合には、前記外輪の外周面のうちで、軸方向に関して前記小径段部に隣接し、且つ、径方向に関して前記外輪軌道と重畳する部分に、前記段差面に開口する係止凹部を、円周方向の１乃至複数箇所に設ける。
又、前記係止凹部と前記小径段部との合計の軸方向に関する幅寸法を、前記外輪の軸方向に関する幅寸法の１／２未満とし、この係止凹部の周方向に関する幅寸法の合計値を、中心角に換算して３６度以下（周長で１／１０以下）としている。
又、前記取付板の軸方向片面で前記嵌合孔の外周縁部分に、係止突起を形成する。この係止突起は、この軸方向片面から軸方向に突出するもので、周方向に関する幅寸法が前記係止凹部の同方向に関する幅寸法よりも小さい。
そして、前記取付板を前記小径段部に外嵌した状態で、前記係止凹部と係止突起とを係合させて、この取付板と前記外輪とが、前記係止凹部と前記係止突起との周方向に関する幅寸法の差に見合う角度のみ周方向に相対回転可能とする。この為に、前記取付板と前記小径段部との嵌合状態を、隙間嵌乃至は弱い締り嵌め（止まり嵌め）とする。
この様な本発明を実施する場合に、請求項２に記載した発明の様に、前記保持部材に組み付けた状態で、前記係止凹部を、前記ラジアル転がり軸受の負荷圏から外れた部分に存在させる。 The rolling bearing unit with a mounting plate of the present invention includes a radial rolling bearing having a small-diameter step portion and a step surface, and a mounting plate, similarly to the conventionally known rolling bearing unit with a mounting plate.
Further, in the case of the present invention, the radial rolling bearing is incorporated in an automobile transmission, and is intended to support a rotating shaft having a constant rotation direction that constitutes the automobile transmission. The radial rolling bearing has an outer ring raceway on an inner peripheral surface, a cylindrical outer ring having both ends opened in the axial direction, an inner ring raceway on an outer peripheral surface, and is arranged concentrically with the outer ring, and the rotation An inner ring that is externally fitted to the shaft, and a plurality of rolling elements that are provided between the outer ring raceway and the inner ring raceway. It is assumed that a small-diameter step portion having a smaller diameter than the outer diameter of the outer ring and a step surface provided at the axially rear end portion of the small-diameter step portion are formed.
In particular, in the case of the present invention, the outer circumferential surface of the outer ring is open to the step surface at a portion adjacent to the small diameter step portion in the axial direction and overlapping the outer ring raceway in the radial direction. Stop recesses are provided at one or more locations in the circumferential direction.
The total width dimension in the axial direction of the locking recess and the small diameter step is less than half of the width dimension in the axial direction of the outer ring, and the total width dimension in the circumferential direction of the locking recess. Is converted to a central angle of 36 degrees or less (peripheral length is 1/10 or less).
A locking projection is formed on the outer peripheral edge portion of the fitting hole on one surface in the axial direction of the mounting plate. This locking projection protrudes in the axial direction from this one axial surface, and the width dimension in the circumferential direction is smaller than the width dimension in the same direction of the locking recess.
Then, in a state where the mounting plate is externally fitted to the small-diameter stepped portion, the locking recess and the locking projection are engaged, and the mounting plate and the outer ring are connected to the locking recess and the locking projection. and rotatable relative to the angle only circumferentially commensurate to the difference between the width dimension in the circumferential direction of the. For this reason, the fitting state between the mounting plate and the small-diameter step portion is a gap fit or a weak interference fit (stop fit).
When carrying out the present invention as described above, as in the invention described in claim 2, the locking recess is present in a portion off the load zone of the radial rolling bearing in a state assembled to the holding member. Let

上述の様に構成する本発明の取付板付転がり軸受ユニットによれば、外輪を、ハウジング等の保持部材に設けた保持凹部に締り嵌めで内嵌固定する構造であっても、クリープ防止と組立作業の容易化とを両立できる。
先ず、組立作業の容易化は、前記外輪を前記保持凹部に締り嵌めで内嵌する際に、取付板側に設けた各取付孔と、前記保持部材側に設けた各第二取付孔とを厳密に（これら各取付孔と各第二取付孔とに取付ねじを掛け渡せる程度に）整合させる必要がない事により図れる。即ち、前記保持凹部に前記外輪を内嵌する作業は、前記各取付孔と前記各第二取付孔との円周方向に関する位相を、大まかに一致させた状態で行えば良い。前記保持凹部に前記外輪を内嵌する（軸方向に押し込む）際に、この外輪が前記保持部材に対して少し回転方向に変位する事はあるにしても、大きく回転する事はない。従って、例えば係止突起を係止凹部のほぼ中央部に位置させ、前記各取付孔と前記各第二取付孔とをほぼ整合させた状態で前記内嵌作業を行えば、内嵌後にも、これら各取付孔とこれら各第二取付孔とをほぼ一致させる事ができる。そして、内嵌後に取付板を前記外輪に対し少しだけ回転させる事で、前記各取付孔と前記各第二取付孔とを厳密に一致させ、これら各取付孔と各第二取付孔とのうちの一方を挿通した取付ねじを他方に螺合し更に締め付けて、前記保持部材に対し前記取付板を支持固定できる。尚、前記外輪の小径段部に前記取付板を外嵌するのは、この外輪を前記保持凹部に内嵌する前でも良いが、内嵌後に外嵌する事もできる。 According to the rolling bearing unit with a mounting plate of the present invention configured as described above, even if the outer ring is fitted and fixed to a holding recess provided in a holding member such as a housing by an interference fit, creep prevention and assembly work are performed. Can be made compatible with
First, the assembly work is facilitated by attaching each mounting hole provided on the mounting plate side and each second mounting hole provided on the holding member side when the outer ring is fitted into the holding recess by an interference fit. This can be achieved by eliminating the need for exact alignment (to the extent that mounting screws can be passed over these mounting holes and second mounting holes). That is, the operation of fitting the outer ring into the holding recess may be performed in a state where the phases in the circumferential direction of the mounting holes and the second mounting holes are roughly matched. When the outer ring is fitted into the holding recess (push in the axial direction), the outer ring does not rotate greatly even if it is slightly displaced in the rotational direction with respect to the holding member. Therefore, for example, if the locking projection is positioned in the substantially central portion of the locking recess, and the fitting operation is performed in a state where the mounting holes and the second mounting holes are substantially aligned, even after the fitting, Each of these mounting holes and each of these second mounting holes can be made to substantially coincide. Then, by slightly rotating the mounting plate with respect to the outer ring after the inner fitting, the mounting holes and the second mounting holes are made to exactly match each other. The mounting plate inserted into one of the two can be screwed into the other and further tightened to support and fix the mounting plate to the holding member. The mounting plate may be externally fitted to the small-diameter step portion of the outer ring before the outer ring is fitted into the holding recess, but may be fitted after the internal fitting.

次に、クリープ防止は、係止凹部と係止突起との係合により図れる。自動車用変速機を構成する回転軸であり、本発明の対象となる取付板付転がり軸受ユニットにより回転自在に支持される回転軸は、回転方向が一定である（往復回転する事はない）。この為、組立完了時点で、前記係止突起が、前記係止凹部のうちで、前記回転方向前端部以外の部分に存在した場合でも、前記外輪が前記保持凹部に対して少しだけクリープすると、前記係止突起と前記係止凹部とが、この係止凹部の回転方向前端部で係合する。前記外輪は、この状態よりも更にクリープする事はないので、この外輪の外周面と前記保持凹部の内周面とがそれ以上擦れ合う事はなく、これら両周面の嵌合部が摩耗する事はない。 Next, creep prevention can be achieved by the engagement between the locking recess and the locking projection. A rotating shaft that constitutes a transmission for an automobile and that is rotatably supported by a rolling bearing unit with a mounting plate that is an object of the present invention has a constant rotation direction (there is no reciprocal rotation). For this reason, when the outer ring is slightly creeped with respect to the holding recess, even when the locking protrusion is present in a portion other than the front end portion in the rotation direction among the locking recesses at the time of assembly completion, The locking protrusion and the locking recess engage with each other at the front end in the rotation direction of the locking recess. Since the outer ring does not creep further than in this state, the outer peripheral surface of the outer ring and the inner peripheral surface of the holding recess do not rub against each other, and the fitting portions of these two peripheral surfaces wear. There is no.

尚、前記係止凹部を形成する分だけ、前記外輪の外周面と前記保持凹部の内周面との当接面積が減少するが、前記係止凹部の周長をこの外周面の周長の１／１０以下に抑えているので、嵌合強度の低下は殆ど無視できる。この嵌合強度の低下を抑える面から、前記係止凹部の軸方向に関する幅寸法は、前記係止突部とを確実に係合させて前記クリープを確実に防止できる限り、小さい方が好ましい。この為に例えば、前記軸方向の幅寸法を、本発明の様に、前記小径段部と前記係止凹部との合計で、前記外輪の幅寸法の１／２未満とする。又、本発明の様に、ハウジングへの組み付け状態で、前記係止凹部が、前記ラジアル転がり軸受の負荷圏から外れた部分（非負荷圏）に存在する様に、この係止凹部と前記係止突起との位置を、前記各取付孔及び各第二取付孔の形成位置との関係で規制する事が好ましい。 Incidentally, the contact area between the outer peripheral surface of the outer ring and the inner peripheral surface of the holding recess is reduced by the amount corresponding to the formation of the locking recess, but the peripheral length of the locking recess is reduced to the peripheral length of the outer peripheral surface. Since it is suppressed to 1/10 or less, a decrease in fitting strength can be almost ignored. From the aspect of suppressing the decrease in the fitting strength, the width dimension in the axial direction of the locking recess is preferably small as long as the locking protrusion can be reliably engaged and the creep can be reliably prevented. For this purpose, for example, the width dimension in the axial direction is set to be less than ½ of the width dimension of the outer ring in the total of the small-diameter stepped portion and the locking recess as in the present invention . Further, as in the present invention , in the assembled state to the housing, the engagement recess and the engagement recess are arranged so that the engagement recess exists in a portion (non-load area) that is out of the load range of the radial rolling bearing. It is preferable to regulate the position of the stop projection in relation to the formation positions of the mounting holes and the second mounting holes.

本発明の実施の形態の１例を示す、回転支持装置の部分断面図。The fragmentary sectional view of the rotation support device which shows one example of an embodiment of the invention. 図１のＡ部拡大図。The A section enlarged view of FIG. 外輪を取り出して図１の右方から見た状態で示す模式図。The schematic diagram shown in the state which took out the outer ring | wheel and was seen from the right side of FIG. 取付板の内周縁部に係止突起を形成する方法の１例を示す模式図。The schematic diagram which shows one example of the method of forming a latching protrusion in the inner peripheral edge part of a mounting plate. 本発明の対象となる回転支持装置の１例を示す部分断面図。The fragmentary sectional view which shows one example of the rotation support apparatus used as the object of this invention. この回転支持装置に組み込む転がり軸受ユニットの従来構造の１例を示す斜視図。The perspective view which shows an example of the conventional structure of the rolling bearing unit integrated in this rotation support apparatus. 同じく断面図。Similarly sectional drawing.

図１〜４は、本発明の実施の形態の１例を示している。尚、本例の特徴は、ラジアル転がり軸受２ａを構成する外輪５ａを、保持部材であるハウジング３に設けた保持凹部１０に締り嵌めで内嵌固定する構造で、クリープ防止と組立作業の容易化とを両立できる様にする点にある。その他の部分の構造及び作用は、前述の図５〜７に示した従来構造と同様であるから、同等部分には同一符号を付して重複する説明を省略若しくは簡略にし、以下、本例の特徴部分を中心に説明する。   1 to 4 show an example of an embodiment of the present invention. The feature of this example is a structure in which the outer ring 5a constituting the radial rolling bearing 2a is internally fitted and fixed to a holding recess 10 provided in the housing 3 as a holding member, thereby preventing creep and facilitating assembly work. It is in the point that it can be compatible with. Since the structure and operation of the other parts are the same as those of the conventional structure shown in FIGS. 5 to 7 described above, the same parts are denoted by the same reference numerals, and redundant description is omitted or simplified. The description will focus on the characteristic part.

本例の取付板付転がり軸受ユニット１２ａを構成するラジアル転がり軸受２ａの外輪５ａの外周面の一部に、深さｈの係止凹部１７を形成している。この係止凹部１７は、取付板１１ａを外嵌する為、前記外輪５ａの端部外周面に全周に亙って形成した小径段部１３に、軸方向に隣接する状態で、円周方向の一部に形成している。従って前記係止凹部１７は、前記外輪５ａの外周面と、前記小径段部１３の端部に存在する段差面１６とに開口している。本例の場合には、前記係止凹部１７を、前記外輪５ａの外周面の周方向１箇所のみ、図３にＬで表した範囲に設けている。この範囲Ｌは、この外輪５ａの周長の１／１０以下、中心角αを３６度以下としている。   A locking recess 17 having a depth h is formed on a part of the outer peripheral surface of the outer ring 5a of the radial rolling bearing 2a constituting the rolling bearing unit with a mounting plate 12a of this example. In order to fit the mounting plate 11a, the locking recess 17 is circumferentially adjacent to the small diameter step portion 13 formed on the outer peripheral surface of the end portion of the outer ring 5a over the entire circumference. Formed as part of. Accordingly, the locking recess 17 is open to the outer peripheral surface of the outer ring 5 a and the step surface 16 present at the end of the small diameter step portion 13. In the case of this example, the locking recess 17 is provided in a range indicated by L in FIG. This range L is 1/10 or less of the circumference of the outer ring 5a and the center angle α is 36 degrees or less.

一方、取付板１１ａの軸方向片面で嵌合孔１４の外周縁部分に係止突起１８を、この取付板１１ａの軸方向片面から軸方向に突出する状態で形成している。前記外輪５ａ及び前記嵌合孔１４の径方向位置に関して、前記係止突起１８の内径側面は、前記係止凹部１７の底面と同じか、この底面よりも少しだけ外側で、且つ、前記外輪５ａの外周面よりも内側に存在する。又、前記係止突起１８の周方向に関する幅寸法は、前記外輪５ａのクリープを防止する面から、この係止突起１８の強度及び剛性を確保できる限り小さく抑える。従って、この係止突起１８の幅寸法は、前記係止凹部１７の同方向に関する幅寸法（前記範囲Ｌと同じ）よりも十分に小さい。
この様な係止突起１８は、図４に矢印で示す様に、前記取付板１１ａのうち、軸方向に関して、この係止突起１８を形成するのとは反対側の外周寄り部分をパンチで押圧して塑性変形させたり、或いは、１対の金型同士の間で強く押圧して塑性変形させる、プレス加工等により形成する。 On the other hand, a locking projection 18 is formed on the outer peripheral edge portion of the fitting hole 14 on one surface in the axial direction of the mounting plate 11a so as to protrude from the one surface in the axial direction of the mounting plate 11a. With respect to the radial positions of the outer ring 5a and the fitting hole 14, the inner diameter side surface of the locking projection 18 is the same as or slightly outside the bottom surface of the locking recess 17 and the outer ring 5a. It exists inside the outer peripheral surface of. The width dimension of the locking projection 18 in the circumferential direction is kept as small as possible to ensure the strength and rigidity of the locking projection 18 from the surface that prevents the outer ring 5a from creeping. Accordingly, the width dimension of the locking projection 18 is sufficiently smaller than the width dimension of the locking recess 17 in the same direction (same as the range L).
As shown by an arrow in FIG. 4, such a locking projection 18 presses a portion near the outer periphery of the mounting plate 11 a on the side opposite to the side where the locking projection 18 is formed in the axial direction. It is formed by press working or the like that is plastically deformed or pressed strongly between a pair of molds.

前述の様な係止凹部１７を有する外輪５ａと、上述の様な係止突起１８を有する前記取付板１１ａとは、前記小径段部１３にこの取付板１１ａを外嵌すると共に、前記係止凹部１７内に前記係止突起１８を進入させた状態に組み合わせる。この状態で、前記外輪５ａと前記取付板１１ａとが、前記係止凹部１７と前記係止突起１８との周方向に関する幅寸法の差に見合う角度のみ、周方向に相対回転可能となる。この為に、前記取付板１１ａを前記小径段部１３に、隙間嵌乃至は弱い締り嵌めで外嵌する。   The outer ring 5a having the locking recess 17 as described above and the mounting plate 11a having the locking protrusion 18 as described above are fitted onto the small diameter step portion 13 and the locking plate 11a is externally fitted. The engagement projection 18 is combined with the recess 17 in a state of entering. In this state, the outer ring 5a and the mounting plate 11a can be relatively rotated in the circumferential direction only at an angle corresponding to the difference in the width dimension of the locking recess 17 and the locking protrusion 18 in the circumferential direction. For this purpose, the mounting plate 11a is externally fitted to the small-diameter step portion 13 with a clearance fit or a weak interference fit.

上述の様に構成する本例の構造を組み立てる場合、前記外輪５ａのうちで前記小径段部１３を除く部分を前記保持凹部１０に、前記係止凹部１７の円周方向に関する位相を大まかに規制した状態で、締り嵌めにより内嵌する。この様に位相を大まかに規制するとは、前記係止凹部１７と前記係止突起１８とを円周方向に相対変位させる事で、前記ハウジング３の複数箇所（例えば３箇所）に形成した通孔１９と、前記取付板１１ａの複数箇所に形成したねじ孔２０とを整合させられる状態にする事を言う。この取付板１１ａと前記ハウジング３との円周方向に関する位相は、前記周方向に関する幅寸法の差分だけ相対変位させる事が可能であるから、前記外輪５ａを前記保持凹部１０に内嵌固定する際に規制する位相は、前記差分に見合うだけずれても良い。従って、この保持凹部１０に前記外輪５ａを締り嵌めで内嵌する作業を容易に行える。そして、内嵌固定後の状態では、この外輪５ａが前記ハウジング３に対しがたつく事がなくなる。   When assembling the structure of this example configured as described above, a portion of the outer ring 5a excluding the small-diameter step portion 13 is restricted to the holding recess 10 and the phase of the locking recess 17 in the circumferential direction is roughly restricted. In this state, it is fitted by interference fit. In this way, roughly restricting the phase means that the locking recess 17 and the locking projection 18 are relatively displaced in the circumferential direction, thereby forming through holes formed at a plurality of locations (for example, 3 locations) of the housing 3. 19 and the screw holes 20 formed at a plurality of locations of the mounting plate 11a are brought into a state where they can be aligned. Since the phase in the circumferential direction between the mounting plate 11a and the housing 3 can be relatively displaced by the difference in the width dimension in the circumferential direction, when the outer ring 5a is fitted and fixed in the holding recess 10 The phase to be regulated may be shifted as much as the difference. Therefore, the operation of fitting the outer ring 5a into the holding recess 10 with an interference fit can be easily performed. In the state after the inner fitting is fixed, the outer ring 5a does not rattle against the housing 3.

前記保持凹部１０に前記外輪５ａを内嵌固定した後、この外輪５ａの軸方向端部で前記ハウジング３の内面から突出した前記小径段部１３に外嵌固定した前記取付板１１ａを、前記外輪５ａに対し回転させる。尚、前記外輪５ａを前記保持凹部１０に内嵌固定する作業と、前記取付板１１ａを前記小径段部１３に外嵌固定する作業との前後は問わない。何れにしても、この取付板１１ａをこの小径段部１３に外嵌固定した状態で、この取付板１１ａ側に突設した前記係止突起１８を、前記外輪５ａ側に形成した係止凹部１７に係合させる。そして、前記取付板１１ａをこの外輪５ａに対し回転させて、前記各通孔１９と前記各ねじ孔２０とを整合させる。次いで、これら各通孔１９を挿通した取付ねじ２１をこれら各ねじ孔２０に螺合し更に締め付ける。この結果、前記取付板１１ａが前記ハウジング３の内面に支持固定されると共に、この取付板１１ａが前記外輪５ａを前記保持凹部１０の奥面に向け押し付けて、この保持凹部１０からこの外輪５ａが抜け出る事を防止する。   After the outer ring 5a is fitted and fixed in the holding recess 10, the mounting plate 11a is fitted and fixed to the small-diameter step 13 protruding from the inner surface of the housing 3 at the axial end of the outer ring 5a. Rotate with respect to 5a. In addition, it does not ask | require before and after the operation | work which fixes the said outer ring | wheel 5a to the said holding | maintenance recessed part 10, and the operation | work which fixes the said mounting plate 11a to the said small diameter step part 13. FIG. In any case, in a state where the mounting plate 11a is externally fitted and fixed to the small-diameter stepped portion 13, the locking projection 18 projecting on the mounting plate 11a side is formed on the locking recess 17 formed on the outer ring 5a side. Engage with. Then, the mounting plate 11a is rotated with respect to the outer ring 5a so that the through holes 19 and the screw holes 20 are aligned. Next, the mounting screws 21 inserted through these through holes 19 are screwed into the respective screw holes 20 and further tightened. As a result, the mounting plate 11 a is supported and fixed to the inner surface of the housing 3, and the mounting plate 11 a presses the outer ring 5 a against the inner surface of the holding recess 10, and the outer ring 5 a extends from the holding recess 10. Prevents exiting.

前記外輪５ａを含むラジアル転がり軸受２ａの内輪７には、回転軸１の端部を内嵌するので、この外輪５ａには、このラジアル転がり軸受２ａの動トルク（回転抵抗）に見合う力が、前記回転軸１が回転している間中加わる。この為、前述した様に、温度上昇に伴って、前記保持凹部１０の内周面と前記外輪５ａの外周面との間の締め代が低下し、この外輪５ａがこの保持凹部１０内で回転する（クリープする）可能性がある。但し、前記回転軸１の回転方向は一定であるから、最初にクリープが発生した直後に、前記係止突起１８と前記係止凹部１７とが、前記回転軸１の回転方向に関して、この係止凹部１７の前端部で係合する。前記外輪５ａは、この状態よりも更に回転する事はない。従って、この外輪５ａの外周面と前記保持凹部１０の内周面とがそれ以上擦れ合う事はなく、これら両周面の嵌合部が摩耗する事はない。   Since the inner ring 7 of the radial rolling bearing 2a including the outer ring 5a is fitted into the end of the rotary shaft 1, a force commensurate with the dynamic torque (rotational resistance) of the radial rolling bearing 2a is applied to the outer ring 5a. The rotation shaft 1 is added while it is rotating. For this reason, as described above, as the temperature rises, the interference between the inner peripheral surface of the holding recess 10 and the outer peripheral surface of the outer ring 5a decreases, and the outer ring 5a rotates within the holding recess 10. There is a possibility of creeping. However, since the rotation direction of the rotating shaft 1 is constant, immediately after the first occurrence of creep, the locking protrusion 18 and the locking recess 17 are engaged with each other with respect to the rotation direction of the rotating shaft 1. Engage at the front end of the recess 17. The outer ring 5a does not rotate further than this state. Therefore, the outer peripheral surface of the outer ring 5a and the inner peripheral surface of the holding recess 10 are not rubbed any more, and the fitting portions of these two peripheral surfaces are not worn.

本発明の取付板付転がり軸受ユニットは、技術的範囲からは外れるが、自動車用変速機を構成する回転軸の端部を支持する為の回転支持部に限らず、各種機械装置の回転支持部に利用できる。但し、回転軸の回転方向が一定である事が条件となる。回転方向が不定（両方向回転）の機械装置の場合には、係止凹部の内側で係止突部が変位できる範囲で、保持凹部の内側で外輪が往復揺動し、嵌合部が摩耗する可能性がある為、本発明を実施する事は不適切である。
又、単列深溝型玉軸受の如きラジアル転がり軸受の組み付け方向が限定されない様に、或いは、ラジアル転がり軸受に対する外輪の組み付け方向が限定されない様に、この外輪の外周面の軸方向両端部に小径段部及び段差面を形成する事もできる。この場合、何れか一方の小径段部にのみ取付板を外嵌し、他方の小径段部はそのまま残す。勿論、この様な構造も、本件各発明の技術的範囲に属する。 Although the rolling bearing unit with a mounting plate of the present invention is out of the technical scope, it is not limited to the rotation support portion for supporting the end portion of the rotation shaft constituting the transmission for an automobile, and the rotation support portion of various mechanical devices. Available. However, it is a condition that the rotating direction of the rotating shaft is constant. In the case of a mechanical device whose rotation direction is indefinite (bidirectional rotation), the outer ring reciprocally swings inside the holding recess and the fitting portion wears within a range in which the locking projection can be displaced inside the locking recess. Because of the possibilities, it is inappropriate to implement the present invention.
Also, a small diameter is provided at both ends of the outer ring in the axial direction so that the mounting direction of the radial rolling bearing such as a single row deep groove ball bearing is not limited or the mounting direction of the outer ring with respect to the radial rolling bearing is not limited. A step part and a step surface can also be formed. In this case, the mounting plate is fitted on only one of the small diameter step portions, and the other small diameter step portion is left as it is. Of course, such a structure also belongs to the technical scope of each invention.

１ 回転軸
２、２ａ ラジアル転がり軸受
３ ハウジング
４ 外輪軌道
５、５ａ 外輪
６ 内輪軌道
７ 内輪
８ 玉
９ 保持器
１０ 保持凹部
１１、１１ａ 取付板
１２、１２ａ 取付板付転がり軸受ユニット
１３ 小径段部
１４ 嵌合孔
１５ 通孔
１６ 段差面
１７ 係止凹部
１８ 係止突起
１９ 通孔
２０ ねじ孔
２１ 取付ねじ DESCRIPTION OF SYMBOLS 1 Rotating shaft 2, 2a Radial rolling bearing 3 Housing 4 Outer ring raceway 5, 5a Outer ring 6 Inner ring raceway 7 Inner ring 8 Ball 9 Cage 10 Holding recessed part 11, 11a Mounting plate 12, 12a Rolling bearing unit with mounting plate 13 Small diameter step part 14 Fit Joint hole 15 Through hole 16 Stepped surface 17 Locking recess 18 Locking protrusion 19 Through hole 20 Screw hole 21 Mounting screw

Claims (2)

ラジアル転がり軸受と取付板とを備え、
このうちのラジアル転がり軸受は、自動車用変速機に組み込まれ、この自動車用変速機を構成する回転方向が一定である回転軸を支持する為のもので、内周面に外輪軌道を有し、軸方向両端部が開口した円筒状の外輪と、外周面に内輪軌道を有し、この外輪と同心に配置され、前記回転軸に外嵌される内輪と、これら外輪軌道と内輪軌道との間に転動自在に設けられた複数個の転動体とを備え、前記外輪の軸方向一端部外周面に、この外輪の外径よりも小径の小径段部、及び、この小径段部の軸方向奥端部に設けられた段差面を形成したものであり、
前記取付板は、外径寄り部分の円周方向複数箇所に取付ねじを挿通若しくは螺合させる為の取付孔を、中央部に嵌合孔を、それぞれ備えたものであり、
この嵌合孔に前記外輪に形成した小径段部を内嵌した状態に組み合わせ、この外輪を保持部材の保持凹部に締り嵌めで内嵌した状態で、前記各取付孔とこの保持部材の一部でこれら各取付孔と整合する複数箇所に形成した第二取付孔とに挿通若しくは螺合した各取付ねじの締め付けに伴って、前記取付板の軸方向片面のうちの前記嵌合孔周囲部分で前記段差面を軸方向に押圧する取付板付転がり軸受ユニットに於いて、
前記外輪の外周面のうちで、軸方向に関して前記小径段部に隣接し、且つ、径方向に関して前記外輪軌道と重畳する部分に、前記段差面に開口する係止凹部が、円周方向の１乃至複数箇所に設けられており、この係止凹部と前記小径段部との合計の軸方向に関する幅寸法は、前記外輪の軸方向に関する幅寸法の１／２未満であり、この係止凹部の周方向に関する幅寸法の合計値が、中心角に換算して３６度以下であり、前記取付板の軸方向片面で前記嵌合孔の外周縁部分にこの軸方向片面から軸方向に突出する、周方向に関する幅寸法が前記係止凹部の同方向に関する幅寸法よりも小さい係止突起が形成されており、前記取付板を前記小径段部に外嵌した状態で、前記係止凹部とこの係止突起とを係合させて、前記取付板と前記外輪とが、周方向に関する幅寸法の差に見合う角度のみ相対回転を可能とした事を特徴とする取付板付転がり軸受ユニット。 A radial rolling bearing and a mounting plate are provided,
Radial rolling bearing of this is incorporated into an automotive transmission, but for the direction of rotation which constitutes the automobile transmission for supporting the rotary shaft is constant, have a outer ring raceway on an inner peripheral surface, A cylindrical outer ring having both ends in the axial direction open, an inner ring raceway on the outer circumferential surface, an inner ring arranged concentrically with the outer ring and fitted on the rotating shaft, and between the outer ring raceway and the inner ring raceway A plurality of rolling elements provided so as to be freely rollable on the outer peripheral surface of the outer ring, a small-diameter step portion having a smaller diameter than the outer diameter of the outer ring, and an axial direction of the small-diameter step portion. A step surface provided at the back end is formed,
The mounting plate is provided with a mounting hole for inserting or screwing a mounting screw into a plurality of locations in the circumferential direction near the outer diameter, and a fitting hole in the center, respectively.
The fitting holes are combined with a state in which a small-diameter step formed on the outer ring is internally fitted, and the outer ring is fitted into the holding recess of the holding member with a tight fit. With the tightening of each mounting screw inserted or screwed into the second mounting holes formed at a plurality of locations aligned with these mounting holes, the portion around the fitting hole on one side in the axial direction of the mounting plate In the rolling bearing unit with a mounting plate that presses the step surface in the axial direction,
Of the outer peripheral surface of the outer ring, adjacent to the cylindrical portion in the axial direction, and the portion overlapping the outer ring raceway in the radial direction, the engaging recesses open to the stepped surface, in the circumferential direction 1 Thru | or multiple places, The width dimension regarding the total axial direction of this latching recessed part and the said small diameter step part is less than 1/2 of the width dimension regarding the axial direction of the said outer ring | wheel, The total value of the width dimension in the circumferential direction is 36 degrees or less in terms of the central angle, and protrudes in the axial direction from one axial surface to the outer peripheral edge portion of the fitting hole on one axial surface of the mounting plate. A locking projection having a width dimension in the circumferential direction smaller than a width dimension in the same direction of the locking recess is formed, and the locking recess and the engagement of the locking plate are fitted in the small diameter stepped portion. by engaging a locking projection, and the said mounting plate outer ring, the circumferential Mounting plate rolling bearing unit, characterized in that the enabling relative rotation only angle commensurate with the difference between the width dimension related direction. 前記保持部材に組み付けた状態で、前記係止凹部が、前記ラジアル転がり軸受の負荷圏から外れた部分に存在する、請求項１に記載した取付板付転がり軸受ユニット。The rolling bearing unit with a mounting plate according to claim 1, wherein the locking recess is present in a portion that is out of a load range of the radial rolling bearing when assembled to the holding member.
JP2011110925A 2011-05-18 2011-05-18 Rolling bearing unit with mounting plate Expired - Fee Related JP5703955B2 (en)

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