JP2008014393A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP2008014393A
JP2008014393A JP2006185707A JP2006185707A JP2008014393A JP 2008014393 A JP2008014393 A JP 2008014393A JP 2006185707 A JP2006185707 A JP 2006185707A JP 2006185707 A JP2006185707 A JP 2006185707A JP 2008014393 A JP2008014393 A JP 2008014393A
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JP
Japan
Prior art keywords
ring
outer ring
groove
outer diameter
rolling bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2006185707A
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Japanese (ja)
Inventor
Tatsuya Fukuda
竜也 福田
Akira Iida
彰 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
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NSK Ltd
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Filing date
Publication date
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Priority to JP2006185707A priority Critical patent/JP2008014393A/en
Publication of JP2008014393A publication Critical patent/JP2008014393A/en
Withdrawn legal-status Critical Current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
    • 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
    • F16C35/06—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
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/10—Force connections, e.g. clamping
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

<P>PROBLEM TO BE SOLVED: To maintain stable creeping resistance while maintaining good performance of insertion into a housing. <P>SOLUTION: In the outer diameter face of an outer ring 1, a pair of recessed grooves 10 in annular shape are formed along the peripheral direction. Into the pair of recessed grooves 10, O-rings 11 in annular shape are fitted whose outer diameter faces are protruded from the recessed grooves 10, respectively. An interference relationship between an inner diameter D2 of the O-ring 11 and a diameter D1 of the recessed groove 10 in the outer diameter face of the outer ring 1 is set to satisfy D1≥1.07×D2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、汎用モータ、ファンモータ、ギヤモータ、サーボモータ、電動工具等のアンバランスな回転荷重が作用する転がり軸受に関する。   The present invention relates to a rolling bearing on which an unbalanced rotational load acts, such as a general-purpose motor, a fan motor, a gear motor, a servo motor, and an electric tool.

クリープ防止に対して、外輪の外径面に円周方向に沿って環状の凹溝を設け、この周方向凹溝にゴムなどの弾性体を入れ、この弾性体がハウジングと外輪の間で突っ張ることにより、クリープを防止する方法が一般的に知られている。   To prevent creep, an annular groove is provided along the circumferential direction on the outer diameter surface of the outer ring, and an elastic body such as rubber is inserted into the circumferential groove, and this elastic body is stretched between the housing and the outer ring. Therefore, a method for preventing creep is generally known.

特許文献１では、外輪の外周面に形成された凹溝と、この凹溝内に嵌入され、凹溝から突出するＯリングとを備えた転がり軸受であって、Ｏリングの硬度がＨｓ６０〜７５であると共に、Ｏリングにおける凹溝からの突出量がＯリングの径の４〜４０％に設定されている。
特開２００２−１３０３０９号公報（Ｐ２００２−１３０３０９Ａ） In patent document 1, it is a rolling bearing provided with the ditch | groove formed in the outer peripheral surface of an outer ring | wheel, and the O-ring which fits in this ditch | groove and protrudes from a ditch | groove, Comprising: The hardness of O-ring is Hs60-75. In addition, the amount of protrusion from the concave groove in the O-ring is set to 4 to 40% of the diameter of the O-ring.
JP 2002-130309 A (P2002-130309A)

しかしながら、軸受のハウジングヘの挿人性を良好にするには、外輪外径面に対するＯリングの突出量を小さくする必要がある一方、クリープ性能を向上するには、Ｏリングの突出量を大きくする必要があり、相反する事を両立させることが困難であった。   However, in order to improve the insertability of the bearing into the housing, it is necessary to reduce the protruding amount of the O-ring with respect to the outer ring outer diameter surface. On the other hand, to improve the creep performance, the protruding amount of the O-ring is increased. It was necessary and it was difficult to achieve both conflicts.

本発明は、上述したような事情に鑑みてなされたものであって、ハウジングヘの挿人性を良好に維持することができると同時に、安定した耐クリープ性能を維持することができる、転がり軸受を提供することを目的とする。   The present invention has been made in view of the circumstances as described above, and is a rolling bearing that can maintain good insertability into the housing and at the same time maintain stable creep resistance. The purpose is to provide.

上記の目的を達成するため、本発明に係る転がり軸受は、
内周面に外輪軌道を有する外輪と、
外周面に内輪軌道を有する内輪と、
これら外輪軌道と内輪軌道との間に転動自在に設けた複数の転動体と、
外輪の外径面に周方向に沿って形成された環状の凹溝と、
凹溝に嵌め込まれ且つ外径面が凹溝から突出した環状のＯリングと、を備えた転がり軸受に於いて、
前記Ｏリングの内径（Ｄ２）と、前記外輪の外径面の凹溝の径（Ｄ１）とに於ける締め代の関係は、
Ｄ１≧１．０７×Ｄ２
を満足する様に設定されていることを特徴とする。 In order to achieve the above object, the rolling bearing according to the present invention is:
An outer ring having an outer ring raceway on the inner peripheral surface;
An inner ring having an inner ring raceway on the outer peripheral surface;
A plurality of rolling elements provided between the outer ring raceway and the inner ring raceway so as to freely roll;
An annular groove formed in the outer diameter surface of the outer ring along the circumferential direction;
In a rolling bearing provided with an annular O-ring that is fitted in a groove and has an outer diameter surface protruding from the groove,
The relationship of the tightening allowance between the inner diameter (D2) of the O-ring and the diameter (D1) of the concave groove on the outer diameter surface of the outer ring is as follows:
D1 ≧ 1.07 × D2
It is set so that it may satisfy.

本発明によれば、Ｏリングが外輪の外径面の凹溝の底面をしっかりと締め付けた構成となっている。そのため、軸受にアンバランスな回転荷重が作用した場合においても、Ｏリングと外輪の外径面の凹溝のクリープが発生しにくくなり、安定した耐クリープ性能を維持することが可能となる。   According to the present invention, the O-ring is configured to firmly tighten the bottom surface of the concave groove on the outer diameter surface of the outer ring. For this reason, even when an unbalanced rotational load is applied to the bearing, it becomes difficult for creep to occur in the grooves on the outer diameter surfaces of the O-ring and the outer ring, and stable creep resistance performance can be maintained.

以下、本発明の実施の形態に係る転がり軸受を図面を参照しつつ説明する。   Hereinafter, a rolling bearing according to an embodiment of the present invention will be described with reference to the drawings.

図１（ａ）は、本発明の実施の形態に係る転がり軸受の断面図であり、（ｂ）は、Ｏリングの断面図である。   Fig.1 (a) is sectional drawing of the rolling bearing which concerns on embodiment of this invention, (b) is sectional drawing of an O-ring.

本発明の実施の形態に係る転がり軸受では、内周面に外輪軌道を有する外輪１と、外周面に内輪軌道を有する内輪２と、これら外輪軌道と内輪軌道との間に転動自在に設けた複数の転動体３とが設けてある。これら転動体３を所定間隔に保持するための保持器４が設けてあり、外輪１及び内輪２の両端部には、シール部材５が設けてある。   In the rolling bearing according to the embodiment of the present invention, the outer ring 1 having the outer ring raceway on the inner peripheral surface, the inner ring 2 having the inner ring raceway on the outer peripheral surface, and the outer ring raceway and the inner ring raceway are rotatably provided. A plurality of rolling elements 3 are also provided. A cage 4 for holding the rolling elements 3 at a predetermined interval is provided, and seal members 5 are provided at both ends of the outer ring 1 and the inner ring 2.

外輪１の外径面には、周方向に沿って形成された環状の一対の凹溝１０が形成してあり、これら一対の凹溝１０には、外径面が凹溝１０から突出した環状のＯリング１１が嵌め込まれている。   A pair of annular grooves 10 formed along the circumferential direction is formed on the outer diameter surface of the outer ring 1, and the pair of grooves 10 has an annular shape with an outer diameter surface protruding from the groove 10. The O-ring 11 is fitted.

本実施の形態では、Ｏリング１１の内径（Ｄ２）と、外輪１の外径面の凹溝１０の径（Ｄ１）とに於ける締め代の関係は、
Ｄ１≧１．０７×Ｄ２
を満足する様に設定されている。 In the present embodiment, the relationship of the tightening allowance between the inner diameter (D2) of the O-ring 11 and the diameter (D1) of the concave groove 10 on the outer diameter surface of the outer ring 1 is
D1 ≧ 1.07 × D2
Is set to satisfy.

従って、Ｏリング１１が外輪１の外径面の凹溝１０の底面をしっかりと締め付けた構成となっている。そのため、軸受にアンバランスな回転荷重が作用した場合においても、Ｏリング１１と外輪１の外径面の凹溝１０のクリープが発生しにくくなり、安定した耐クリープ性能を維持することが可能となる。   Accordingly, the O-ring 11 is configured to firmly tighten the bottom surface of the concave groove 10 on the outer diameter surface of the outer ring 1. Therefore, even when an unbalanced rotational load is applied to the bearing, creep of the O-ring 11 and the groove 10 on the outer diameter surface of the outer ring 1 is less likely to occur, and stable creep resistance performance can be maintained. Become.

Ｏリングの内径（Ｄ１）と外輪の外径面の凹溝の径（Ｄ２）に於ける締め代を、下記の様に設定した転がり軸受を用意して、クリープ試験を実施した。   A rolling bearing was prepared in which the allowance in the inner diameter (D1) of the O-ring and the diameter (D2) of the groove on the outer diameter surface of the outer ring was set as follows, and a creep test was performed.

（評価軸受）
深溝玉軸受６２０４（内径：２０ｍｍ、外径：４７ｍｍ、幅：１４ｍｍ）
（１）締め代７％以上に設定した軸受（本発明の実施例）
（２）締め代６％以下に設定した軸受（比較例）。 (Evaluation bearing)
Deep groove ball bearing 6204 (inner diameter: 20 mm, outer diameter: 47 mm, width: 14 mm)
(1) Bearing set with a tightening allowance of 7% or more (Example of the present invention)
(2) Bearing set with a tightening allowance of 6% or less (comparative example).

（評価内容）
クリープ試験
上記転がり軸受にアンバランス荷重を与え、クリープし始めた時の荷重をクリープ限界荷重とした。 (Evaluation content)
Creep test An unbalanced load was applied to the rolling bearing, and the load at the start of creep was defined as the creep limit load.

（評価結果）
図２は、Ｏリング突出量とクリープ限界荷重との関係を示すグラフである。図２の結果から、本発明の実施例にて、安定した耐クリープ性能を維持できることを確認した。 (Evaluation results)
FIG. 2 is a graph showing the relationship between the O-ring protrusion amount and the creep limit load. From the results shown in FIG. 2, it was confirmed that stable creep resistance could be maintained in the example of the present invention.

なお、本発明は、上述した実施の形態に限定されず、種々変形可能である。   In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

（ａ）は、本発明の実施の形態に係る転がり軸受の断面図であり、（ｂ）は、Ｏリングの断面図である。(A) is sectional drawing of the rolling bearing which concerns on embodiment of this invention, (b) is sectional drawing of an O-ring. Ｏリング突出量とクリープ限界荷重との関係を示すグラフであるIt is a graph which shows the relationship between O ring protrusion amount and creep limit load.

符号の説明Explanation of symbols

１ 外輪
２ 内輪
３ 転動体
４ 保持器
５ シール部材
１０ 凹溝
１１ Ｏリング DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Rolling element 4 Cage 5 Seal member 10 Groove 11 O-ring

Claims (1)

内周面に外輪軌道を有する外輪と、
外周面に内輪軌道を有する内輪と、
これら外輪軌道と内輪軌道との間に転動自在に設けた複数の転動体と、
外輪の外径面に周方向に沿って形成された環状の凹溝と、
凹溝に嵌め込まれ且つ外径面が凹溝から突出した環状のＯリングと、を備えた転がり軸受に於いて、
前記Ｏリングの内径（Ｄ２）と、前記外輪の外径面の凹溝の径（Ｄ１）とに於ける締め代の関係は、
Ｄ１≧１．０７×Ｄ２
を満足する様に設定されていることを特徴とする転がり軸受。 An outer ring having an outer ring raceway on the inner peripheral surface;
An inner ring having an inner ring raceway on the outer peripheral surface;
A plurality of rolling elements provided between the outer ring raceway and the inner ring raceway so as to freely roll;
An annular groove formed in the outer diameter surface of the outer ring along the circumferential direction;
In a rolling bearing provided with an annular O-ring that is fitted in a groove and has an outer diameter surface protruding from the groove,
The relationship of the tightening allowance between the inner diameter (D2) of the O-ring and the diameter (D1) of the concave groove on the outer diameter surface of the outer ring is as follows:
D1 ≧ 1.07 × D2
Rolling bearing characterized by being set to satisfy
JP2006185707A 2006-07-05 2006-07-05 Rolling bearing Withdrawn JP2008014393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006185707A JP2008014393A (en) 2006-07-05 2006-07-05 Rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006185707A JP2008014393A (en) 2006-07-05 2006-07-05 Rolling bearing

Publications (1)

Publication Number Publication Date
JP2008014393A true JP2008014393A (en) 2008-01-24

Family

ID=39071613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006185707A Withdrawn JP2008014393A (en) 2006-07-05 2006-07-05 Rolling bearing

Country Status (1)

Country Link
JP (1) JP2008014393A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107013569A (en) * 2015-11-25 2017-08-04 株式会社捷太格特 Rolling bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107013569A (en) * 2015-11-25 2017-08-04 株式会社捷太格特 Rolling bearing

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