JP2000257640A - Seal structure of bearing for tensioner - Google Patents
Seal structure of bearing for tensionerInfo
- Publication number
- JP2000257640A JP2000257640A JP11058389A JP5838999A JP2000257640A JP 2000257640 A JP2000257640 A JP 2000257640A JP 11058389 A JP11058389 A JP 11058389A JP 5838999 A JP5838999 A JP 5838999A JP 2000257640 A JP2000257640 A JP 2000257640A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- seal
- tensioner
- lip
- pulley
- 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.)
- Pending
Links
Classifications
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
-
- 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
- F16C33/726—Sealings with means to vent the interior of the bearing
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
Abstract
(57)【要約】
【課題】製造上や輸送中の温度変化・気候変化等による
シールリップ部の吸着を防止するテンショナ用軸受のシ
ール構造を提供することである。
【解決手段】接触シール７における主リップ１３の軸受
摺動面１４に凸部１６を突設し、凸部１６を介して内輪
周溝６に摺接する。
(57) [Problem] To provide a seal structure of a bearing for a tensioner, which prevents sticking of a seal lip portion due to a temperature change, a climatic change, or the like during manufacturing or transportation. A projection 16 is provided on a bearing sliding surface 14 of a main lip 13 in a contact seal 7 and slidably contacts an inner ring peripheral groove 6 via the projection 16.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、テンショナ用軸受
のシール構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved seal structure for a tensioner bearing.
【０００２】[0002]
【従来の技術】軸受（単列・複列玉軸受）の外輪側にプ
ーリを圧入し、テンショナ用軸受として用いており、こ
のプーリの材質としては、例えば鋼製（ＳＣ，ＳＰＣＣ
等）が従来から知られているが、近年プーリの軽量化お
よびコストダウンを狙って樹脂プーリ化が進んでいる。
また、軸受内へ水等の浸入を防止すると共に軸受内に封
入したグリースが洩れるのを防止するため、シールリッ
プが設けられている。2. Description of the Related Art A pulley is press-fitted on the outer ring side of a bearing (single-row / double-row ball bearing) and used as a bearing for a tensioner. The material of this pulley is, for example, steel (SC, SPCC).
And the like) have been conventionally known, but in recent years, resin pulleys have been developed in order to reduce the weight and cost of pulleys.
Further, a seal lip is provided to prevent water or the like from entering the bearing and to prevent grease sealed in the bearing from leaking.
【０００３】[0003]
【発明が解決しようとする課題】しかし、軸受に樹脂製
プーリを成形する際、溶かした樹脂を外輪側にもってく
るため、成形時に軸受の温度が上昇する。そのため軸受
が冷えた時にシールリップ部が吸着しこのまま使用する
とトルクが重くなるという問題が生じていた。However, when a resin pulley is formed on a bearing, the melted resin is brought to the outer ring side, so that the temperature of the bearing rises during molding. Therefore, when the bearing is cooled, the seal lip is attracted, and if used as it is, there is a problem that the torque increases.
【０００４】また、プーリ材質が鋼製（例えば、ＳＣ，
ＳＰＣＣ等）であっても、航空輸送時の気圧変化等によ
り上記吸着問題の発生が見られた。The pulley is made of steel (for example, SC,
SPCC, etc.), the above-mentioned adsorption problem occurred due to a change in air pressure during air transportation.
【０００５】本発明は、従来技術の有するこのような問
題点に鑑みなされたものであり、その目的とするところ
は、製造上や輸送中の温度変化・気候変化等によるシー
ルリップ部の吸着を防止するテンショナ用軸受のシール
構造を提供することである。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to prevent the seal lip from adsorbing due to a temperature change or a climatic change during manufacturing or transportation. It is an object of the present invention to provide a tensioner bearing seal structure for preventing the tensioner.
【０００６】[0006]
【課題を解決するための手段】上記課題を達成するため
に本発明がなした技術的手段は、外輪と内輪との間に接
触シールを備え、該接触シールにおける主リップの軸受
摺動面に一個乃至複数個の凸部を設けたことである。In order to achieve the above-mentioned object, a technical means of the present invention is to provide a contact seal between an outer ring and an inner ring, and to provide a main lip of the contact seal with a bearing sliding surface of a bearing. That is, one or more convex portions are provided.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施形態を図に基
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００８】図１〜図４は、本発明の実施の形態の第１
例を示している。図中、１はプーリ、２は軸受を示す。
なお、図示例では、単列の玉軸受について開示するが、
複列であっても、またころ軸受であってもよく、外輪３
と内輪５との間に接触シール７を備えた構成のものであ
れば特に限定されるものではない。FIGS. 1 to 4 show a first embodiment of the present invention.
An example is shown. In the figure, 1 indicates a pulley and 2 indicates a bearing.
In the illustrated example, a single-row ball bearing is disclosed.
It may be a double row or a roller bearing.
The configuration is not particularly limited as long as the configuration includes a contact seal 7 between the inner ring 5 and the inner ring 5.
【０００９】また、プーリ１は、本実施形態では樹脂製
のものをもって説明する。In the present embodiment, the pulley 1 will be described as being made of resin.
【００１０】軸受２は、外輪３と内輪５との間におい
て、保持器１８によって保持された転動体１７を備える
と共に、外輪３の周溝４に外周縁１０を固定し、内周１
１側のシールリップ１２を内輪５の周溝６に接触せしめ
た接触シール７を内外輪間に備えて構成されている。そ
して、該軸受２における外輪外径３ａに樹脂製プーリ１
を一体に成形している。The bearing 2 has a rolling element 17 held by a retainer 18 between the outer ring 3 and the inner ring 5, and has an outer peripheral edge 10 fixed in a peripheral groove 4 of the outer ring 3.
A contact seal 7 in which the seal lip 12 on one side is brought into contact with the circumferential groove 6 of the inner ring 5 is provided between the inner and outer rings. The resin pulley 1 is attached to the outer ring outer diameter 3a of the bearing 2.
Are integrally molded.
【００１１】また、外輪３の外径３ａには、図１に示す
ような所望深さ・所望幅の凹溝３ｂを外径周方向に一個
乃至複数個、連続あるいは断続的に設け、該凹溝３ｂ内
にプーリ１の内径が入り込む構造としていることから、
樹脂製プーリ１との固着力を高めている。In the outer diameter 3a of the outer race 3, one or more concave grooves 3b having a desired depth and a desired width as shown in FIG. Since the inner diameter of the pulley 1 is inserted into the groove 3b,
The fixing force with the resin pulley 1 is increased.
【００１２】なお、樹脂製プーリ１、および外輪３、内
輪５、保持器１８、転動体１７は、本実施形態に示す構
造に何等限定されるものではなく、各々周知構造に変更
適用することも本発明の範囲内である。Incidentally, the resin pulley 1, the outer ring 3, the inner ring 5, the retainer 18, and the rolling elements 17 are not limited to the structure shown in the present embodiment, and may be modified and applied to known structures. It is within the scope of the present invention.
【００１３】接触シール７は、図２〜図４に示すように
芯金８をゴム９で被覆し、内周１１側に主リップ１３と
副リップ１５とを備えると共に、主リップ１３の軸受摺
動面１４に一個乃至複数個の凸部１６を設けて構成され
ている。As shown in FIGS. 2 to 4, the contact seal 7 has a core metal 8 covered with rubber 9 and has a main lip 13 and a sub lip 15 on the inner circumference 11 side. The moving surface 14 is provided with one or more convex portions 16.
【００１４】凸部１６を除くシール全体構造は、特に限
定されるものではなく、周知の接触シール構造（例え
ば、シール全体形状・シールリップ構成・外周縁構成な
ど）が適用可能である。また、接触シール７は、芯金８
を樹脂被覆してなるものであってもよく、またゴムある
いは樹脂のみからなるものであってもよい。The overall structure of the seal except for the convex portion 16 is not particularly limited, and a well-known contact seal structure (for example, overall seal shape, seal lip configuration, outer peripheral configuration, etc.) can be applied. Further, the contact seal 7 includes a core 8
May be coated with resin, or may be formed only of rubber or resin.
【００１５】凸部１６は、小径の円柱状で、主リップ１
３と同一材料をもって一体的に形成されている。凸部１
６は、主リップ１３の軸受摺動面１４周方向に等間隔か
つ同一高さで突設されており、通常の軸受回転によって
摩滅可能な微量構造（形状・サイズ・材質等）とする。The convex portion 16 is a small-diameter cylindrical shape, and the main lip 1
3 and are integrally formed with the same material. Convex part 1
Numerals 6 are provided at equal intervals and at the same height in the circumferential direction of the bearing sliding surface 14 of the main lip 13 and have a minute structure (shape, size, material, etc.) that can be worn by ordinary bearing rotation.
【００１６】すなわち、凸部１６は通常の軸受回転によ
って摩滅しシール性能に影響を及ぼすことのない構成で
あれば、凸部の形状・サイズ・材質、あるいは配設数・
配設間隔などは、特に限定されるものではなく任意に設
定可能である。凸部１６は、周方向同一線上に突設して
いるが、周方向に千鳥状に突設してなるものであっても
よい。That is, as long as the convex portion 16 does not wear out due to normal rotation of the bearing and does not affect the sealing performance, the shape, size and material of the convex portion, or the number of protrusions,
The arrangement interval and the like are not particularly limited and can be set arbitrarily. The protruding portions 16 protrude on the same line in the circumferential direction, but may protrude in a staggered manner in the circumferential direction.
【００１７】また、凸部１６は接触シール成形時に一体
成形されるものであっても良いが、別途成形して主リッ
プの軸受摺動面に後付けするものとしてもよく成形方法
は任意であって限定されない。The convex portion 16 may be formed integrally during the contact seal molding, but may be formed separately and then attached to the bearing sliding surface of the main lip, and the molding method is arbitrary. Not limited.
【００１８】従って、凸部１６のみが軸受摺動面と接触
しており、製造上や輸送中の温度変化・気候変化時にお
いても、該凸部１６の周辺からエアーが抜け、これによ
り、シールリップが軸受摺動面に吸着するのを防止し、
使用時、軸受はスムーズな回転をすることができる。ま
た、この凸部１６は微量のため、しばらく回転すると摩
滅して通常のシールと同等になる。図５は、本発明の実
施の形態の第２例を示す。本例の場合、プーリ材質は鋼
製（例えばＳＣ、ＳＰＣＣ等）であり、その他の構成
は、第１例と同様であり、説明を省略する。Therefore, only the convex portion 16 is in contact with the bearing sliding surface, so that air is released from the periphery of the convex portion 16 even during temperature change or climatic change during manufacturing or transportation, whereby the sealing is achieved. Prevents the lip from sticking to the bearing sliding surface,
In use, the bearing can rotate smoothly. In addition, since the protrusion 16 is a very small amount, it is worn out after being rotated for a while and becomes equivalent to a normal seal. FIG. 5 shows a second example of the embodiment of the present invention. In the case of this example, the material of the pulley is steel (for example, SC, SPCC, etc.), and the other configuration is the same as that of the first example, and the description is omitted.
【００１９】[0019]
【発明の効果】本発明は、上述の通りの構成としたた
め、主リップの軸受摺動面に設けた凸部により、製造上
や輸送中の温度変化・気候変化等によるシールリップ部
の吸着を防止することができ、シールリップ部の吸着に
よりトルクを重くしてしまうという従来技術の抱えてい
た問題点を解消できる。これにより、プーリの軽量化お
よびコストダウンを有効に達成できた。Since the present invention has the above-described structure, the convex portion provided on the bearing sliding surface of the main lip absorbs the seal lip portion due to a temperature change or a climatic change during manufacturing or transportation. Thus, the problem of the prior art that the torque is increased by the suction of the seal lip can be solved. As a result, the weight and cost of the pulley were effectively reduced.
【図１】本発明の実施形態の第一例を示す縦断側面図。FIG. 1 is a longitudinal sectional side view showing a first example of an embodiment of the present invention.
【図２】軸受部の一部を拡大して示す縦断面図。FIG. 2 is an enlarged longitudinal sectional view showing a part of a bearing unit.
【図３】要部拡大断面図。FIG. 3 is an enlarged sectional view of a main part.
【図４】要部拡大正面図。FIG. 4 is an enlarged front view of a main part.
【図５】本発明の実施形態の第二例を示す縦断側面図。FIG. 5 is a longitudinal side view showing a second example of the embodiment of the present invention.
１：プーリ ２：軸受 ７：接触シール １０：外周縁 １１：内周 １２：シールリップ １３：主リップ １４：軸受摺動面 １６：凸部 1: Pulley 2: Bearing 7: Contact seal 10: Outer periphery 11: Inner periphery 12: Seal lip 13: Main lip 14: Bearing sliding surface 16: Convex portion
Claims (1)
該接触シールにおける主リップの軸受摺動面に一個乃至
複数個の凸部を設けたことを特徴とするテンショナ用軸
受のシール構造。1. A contact seal is provided between an outer ring and an inner ring,
A seal structure for a bearing for a tensioner, wherein one or more projections are provided on a bearing sliding surface of a main lip in the contact seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11058389A JP2000257640A (en) | 1999-03-05 | 1999-03-05 | Seal structure of bearing for tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11058389A JP2000257640A (en) | 1999-03-05 | 1999-03-05 | Seal structure of bearing for tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000257640A true JP2000257640A (en) | 2000-09-19 |
Family
ID=13083001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11058389A Pending JP2000257640A (en) | 1999-03-05 | 1999-03-05 | Seal structure of bearing for tensioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000257640A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308117A (en) * | 2004-04-22 | 2005-11-04 | Nsk Ltd | Rolling bearing |
| DE112008000271T5 (en) | 2007-01-30 | 2009-12-31 | Ntn Corp. | Ball bearing cage and method of manufacturing a ball bearing cage |
| CN102042334A (en) * | 2011-01-06 | 2011-05-04 | 无锡市第二轴承有限公司 | Waterproof seal ring for bearing |
-
1999
- 1999-03-05 JP JP11058389A patent/JP2000257640A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308117A (en) * | 2004-04-22 | 2005-11-04 | Nsk Ltd | Rolling bearing |
| DE112008000271T5 (en) | 2007-01-30 | 2009-12-31 | Ntn Corp. | Ball bearing cage and method of manufacturing a ball bearing cage |
| US8317404B2 (en) | 2007-01-30 | 2012-11-27 | Ntn Corporation | Bearing ball cage and method of making the same |
| DE112008000271B4 (en) * | 2007-01-30 | 2021-06-17 | Ntn Corp. | Ball bearing cage |
| CN102042334A (en) * | 2011-01-06 | 2011-05-04 | 无锡市第二轴承有限公司 | Waterproof seal ring for bearing |
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