JPH0442572Y2 - - Google Patents
Info
- Publication number
- JPH0442572Y2 JPH0442572Y2 JP1986081338U JP8133886U JPH0442572Y2 JP H0442572 Y2 JPH0442572 Y2 JP H0442572Y2 JP 1986081338 U JP1986081338 U JP 1986081338U JP 8133886 U JP8133886 U JP 8133886U JP H0442572 Y2 JPH0442572 Y2 JP H0442572Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- seal
- groove
- lip
- seal body
- 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.)
- Expired
Links
- 238000009423 ventilation Methods 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004519 grease Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- F16C33/726—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
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- 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
- F16C33/7856—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 with a single sealing lip
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、ころがり軸受の密封装置に関し、
とくに軸受外部に連通する通気溝を有する接触形
密封装置における密封性能を改善したものであ
る。[Detailed description of the invention] [Industrial application field] This invention relates to a sealing device for a rolling bearing.
In particular, the sealing performance of a contact type sealing device having a ventilation groove communicating with the outside of the bearing is improved.
従来、接触形のシール体によつて密封されたこ
ろがり軸受においては、温度変化その他の使用条
件によつて軸受内部の圧力が低下して負圧になつ
たり、あるいはその反対に内圧が上昇して軸受外
部よりも高圧になることがある。
Conventionally, in rolling bearings sealed with contact-type seal bodies, the pressure inside the bearing may drop and become negative pressure due to temperature changes or other usage conditions, or conversely, the internal pressure may rise. The pressure may be higher than that outside the bearing.
軸受の内部が負圧になると、シール体のリツプ
がシール溝に吸着されて軸受のトルクを増大さ
せ、回転性能を阻害することになり、その反対に
軸受内圧が上昇すると、リツプがシール溝から外
れて密封性能を損なうという弊害が生ずる。 When the internal pressure of the bearing becomes negative, the lip of the seal body is attracted to the seal groove, increasing the torque of the bearing and impeding rotational performance.On the other hand, when the internal pressure of the bearing increases, the lip of the seal body is attracted to the seal groove. This may cause the problem that it may come off and impair sealing performance.
そこで、このような弊害を除去する手段とし
て、シール体の固定部とリツプとの双方、または
何れか一方に、軸受の内部と外部とを連通する通
気溝を設けた内圧調整機構付きの密封装置が知ら
れており、軸受内圧が変動したときに、通気溝を
介して軸受内部への空気の流入、軸受外部への空
気の排出を行うようにしている。 Therefore, as a means to eliminate such problems, a sealing device with an internal pressure adjustment mechanism is provided in which a ventilation groove is provided in the fixed part of the seal body and/or the lip to communicate between the inside and outside of the bearing. is known, in which air flows into the bearing through ventilation grooves and air is discharged to the outside of the bearing when the internal pressure of the bearing fluctuates.
上記の内圧調整機構付きの密封装置において
は、軸受の内部と外部とが常時シール体の通気溝
によつて連通しているため、通気溝を大きくする
とグリースが軸受外部へ流出するほか、軸受外部
からごみその他の異物が侵入することになり、通
気溝を小さくしても水のかかる場所や水中で軸受
を使用するときは水の浸入を阻止することができ
ないなど、十分な密封性能が得られないだけでな
く、軸受内部で飛散したグリースによつて通気溝
が閉されて空気の円滑な流通を妨げるという問題
がある。
In the above-mentioned sealing device with an internal pressure adjustment mechanism, the inside and outside of the bearing are always in communication through the ventilation groove of the seal body. However, even if the ventilation grooves are made small, sufficient sealing performance cannot be obtained when the bearing is used in locations where it may be exposed to water or when the bearing is used underwater. In addition, there is a problem in that the ventilation grooves are closed by grease scattered inside the bearing, preventing smooth air flow.
この考案は、上記の問題を解決して、軸受の内
圧調整機能を損なわずに、軸受外部からの異物、
とくに水の浸入を阻止する機能を備えた密封装置
を提供することを目的とする。 This invention solves the above problems and prevents foreign matter from outside the bearing without impairing the bearing's internal pressure adjustment function.
In particular, it is an object of the present invention to provide a sealing device having a function of preventing water from entering.
〔問題点を解決するための手段〕
この考案の密封装置は、シール体の固定部のシ
ール固定溝との固定面とリツプ部のシール摺接溝
との接触面との少なくとも一方に、軸受の内部と
外部とを連通させる通気溝が設けてある。[Means for solving the problem] The sealing device of this invention has a bearing on at least one of the fixing surface of the fixing part of the seal body with the seal fixing groove and the contact surface of the lip part with the seal sliding groove. A ventilation groove is provided to communicate the inside and outside.
シール体の固定部とリツプ部との少なくとも一
方に設けた通気溝には、軸受外部に面する側の開
口端に薄肉部を設けて通気溝を閉塞している。 The ventilation groove provided in at least one of the fixing portion and the lip portion of the seal body is provided with a thin portion at the open end facing the outside of the bearing to close the ventilation groove.
通気溝を閉塞する薄肉部は、軸受内圧の変動に
追従して弾性変形可能な肉厚になつている。 The thin wall portion that closes the ventilation groove has a wall thickness that allows it to be elastically deformed in accordance with fluctuations in the internal pressure of the bearing.
この考案の密封装置は、軸受内圧が変動したと
き、シール体の固定部とリツプとの少なくとも一
方に設けられた通気溝を閉塞する薄肉部が内圧に
応じて弾性変形して、シール体の固定側において
は、軸受固定輪のシール固定溝とこれに密着した
シール体の固定部の外周縁との間にすき間が生
じ、シール体のリツプ側においては、軸受回転輪
のシール摺接溝とこれに接触したシール体のリツ
プの内周縁との間にすき間が生じ、これらのすき
間を介して開通した通気経路を経て、軸受内部へ
の空気の流入、軸受外部への空気の排出が行われ
る。
In the sealing device of this invention, when the internal pressure of the bearing fluctuates, the thin part that closes the ventilation groove provided in at least one of the fixed part and the lip of the seal body elastically deforms in accordance with the internal pressure, thereby fixing the seal body. On the lip side of the seal body, there is a gap between the seal fixing groove of the bearing fixed ring and the outer circumferential edge of the fixed part of the seal body that is in close contact with this groove, and on the lip side of the seal body, there is a gap between the seal sliding groove of the bearing rotating ring and this gap. A gap is created between the lip of the seal and the inner circumferential edge of the seal body that is in contact with the seal body, and air flows into the bearing interior and air is discharged to the outside of the bearing through a ventilation path opened through these gaps.
また、軸受内圧に変動の少ない使用条件下、ま
たは軸受の回転停止中においては、シール体の固
定側とリツプ側との少なくとも一方に設けられた
通気溝の開口端は、薄肉部によつて閉塞されてい
るため、軸受外部からの異物の侵入、ないしは水
の浸入は阻止されている。 In addition, under operating conditions with little variation in the internal pressure of the bearing or when the bearing is not rotating, the open end of the ventilation groove provided on at least one of the fixed side and the lip side of the seal body is blocked by the thin wall part. This prevents foreign matter or water from entering from outside the bearing.
以下、この考案の実施例については、図面を参
照して説明する。第1図はこの考案の実施例を示
す上半部縦断側面図、第2図はシール体の要部を
示す背面図である。
Examples of this invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional side view of the upper half of an embodiment of this invention, and FIG. 2 is a rear view showing the main parts of the seal body.
第1図は、外輪(固定輪)10と内輪(回転
輪)20との間に玉15が転動自在に介装され、
外輪10および内輪20の両端両側がシール体3
0によつて密封された玉軸受についての実施例で
ある(一方の端面側のみを図示)。 In FIG. 1, balls 15 are rotatably interposed between an outer ring (fixed ring) 10 and an inner ring (rotating ring) 20.
Both ends of the outer ring 10 and the inner ring 20 are provided with seal bodies 3.
2 is an example of a ball bearing sealed by 0 (only one end face side is shown).
外輪10には、端面側の内周面の円周方向にシ
ール固定溝11が形成され、内輪20には、端面
側の外周面の円周方向にシール摺接溝21が形成
されている。 The outer ring 10 has a seal fixing groove 11 formed in the circumferential direction on the inner circumferential surface on the end face side, and the inner ring 20 has a seal sliding groove 21 formed in the circumferential direction on the outer circumferential face on the end face side.
シール体30は、芯金31によつて補強されたゴ
ム等の弾性体を素材とする環状板であり、その外
周側に固定部32が成形され、内周側にリツプ部
36が形成されている。このリツプ部36には、
軸方向の内側に向かつて傾斜する主リツプ37
と、主リツプ37の基部側から分岐して軸方向内
側に延びる第1の補助リツプ38aと、主リツプ
37よりも軸方向外側から半径方向内側に延びる
第2の補助リツプ38bとが、それぞれ設けられ
ている。The seal body 30 is an annular plate made of an elastic body such as rubber and reinforced by a core metal 31, and has a fixing part 32 formed on its outer circumferential side and a lip part 36 formed on its inner circumferential side. There is. This lip portion 36 has
Main lip 37 tilting axially inward
A first auxiliary lip 38a branches from the base side of the main lip 37 and extends axially inward, and a second auxiliary lip 38b extends radially inward from the axial outside of the main lip 37. It is being
このシール体30は、固定部32の内側面と外
側面とを、それぞれ外輪10のシール固定溝11
の内側段面と外側斜面とに密着させて固定し、リ
ツプ部36の主リツプ37の先端面を、内輪20
のシール摺接溝21の内側斜面に接触させること
によつて軸受を密封している。第1の補助リツプ
38aは、軸受内方に突出して、軸受内部に封入
されたグリースの流れが軸受の内方へ向かうよう
に案内する機能を有し、第2の補助リツプ38b
は、内輪20の端部側外周面との間に適宜のすき
間を保つて対向し、軸受外部からの異物の侵入を
防止する機能を営む。 This seal body 30 connects the inner and outer surfaces of the fixing portion 32 to the seal fixing groove 11 of the outer ring 10, respectively.
The main lip 37 of the lip portion 36 is fixed in close contact with the inner step surface and the outer slope of the inner ring 20.
The bearing is sealed by contacting the inner slope of the seal sliding groove 21. The first auxiliary lip 38a protrudes inward of the bearing and has the function of guiding the flow of grease sealed inside the bearing toward the inside of the bearing, and the second auxiliary lip 38b
is opposed to the outer circumferential surface of the end portion of the inner ring 20 with an appropriate gap therebetween, and functions to prevent foreign matter from entering from outside the bearing.
上記のシール体30の固定部32には、軸受内
部に連通する1個または複数個の通気溝33が内
側面の半径方向に設けてあり、またその外径面に
も1個または複数個の通気溝34が軸方向に設け
られている。この半径方向の通気溝33と軸方向
の通気溝34とは、周方向の位置をずらせて設け
られているが、固定部32の外径面と外輪10の
シール固定溝11の内周面との間に形成される空
間部13を介して互いに連通している。固定部3
2の外径面の通気溝の34が軸方向外側縁におい
て軸受外部に面する側の開口端には、固定部32
の外側面および外径面と同一面をもつ薄肉部35
が設けられ、この薄肉部35によつて通気溝34
が閉塞されている。 The fixing portion 32 of the seal body 30 has one or more ventilation grooves 33 provided in the radial direction on the inner surface thereof, which communicate with the inside of the bearing, and one or more ventilation grooves 33 on the outer diameter surface thereof. A ventilation groove 34 is provided in the axial direction. The radial ventilation groove 33 and the axial ventilation groove 34 are provided at different positions in the circumferential direction; They communicate with each other via a space 13 formed between them. Fixed part 3
A fixing portion 32 is provided at the open end of the ventilation groove 34 on the outer diameter surface of No. 2 facing the outside of the bearing at the axially outer edge.
Thin wall portion 35 having the same surface as the outer surface and outer diameter surface of
is provided, and the ventilation groove 34 is formed by this thin wall portion 35.
is blocked.
また、シール体30のリツプ部36の主リツプ
37についても、その先端面に1個または複数個
の通気溝39が内周縁から外周縁にかけて設けて
あり、外周縁側における開口端が軸受内部に面し
て連通し、内周縁側において軸受外部に面する側
の開口端は、主リツプ部37の先端面にこれと同
一面で設けられた薄肉部40によつて閉塞されて
いる。 The main lip 37 of the lip portion 36 of the seal body 30 is also provided with one or more ventilation grooves 39 on its tip surface from the inner circumferential edge to the outer circumferential edge, and the open end on the outer circumferential side faces the inside of the bearing. The opening end on the side facing the outside of the bearing on the inner circumferential edge side is closed by a thin wall portion 40 provided on the same surface as the distal end surface of the main lip portion 37.
上記のシール体30の固定側の薄肉部35とリ
ツプ側の薄肉部40との肉厚は、軸受の使用中に
おける内圧が所定の値まで上下動したとき、その
変動に追従して膨出する程度の弾性変形可能な厚
さに選定されている。 The wall thicknesses of the fixed-side thin-walled portion 35 and the lip-side thin-walled portion 40 of the seal body 30 swell when the internal pressure fluctuates up and down to a predetermined value while the bearing is in use, following the fluctuations. The thickness is selected so that it can be elastically deformed to a certain degree.
上記構成のシール体30が組み付けられた玉軸
受は、シール体30の固定部32に設けられた軸
方向の通気溝34と主リツプ37に設けられた通
気溝39との軸受外部に面する側の開口端が、そ
れぞれ薄肉部35,40によつて閉塞されている
ため、シール体30によつて完全に密封された状
態となつている。 The ball bearing in which the seal body 30 having the above configuration is assembled has the axial ventilation groove 34 provided in the fixed portion 32 of the seal body 30 and the ventilation groove 39 provided in the main lip 37 on the side facing the outside of the bearing. Since the opening ends of the openings are respectively closed by the thin wall portions 35 and 40, the seal body 30 completely seals the opening ends.
したがつて、軸受使用中の温度変化その他の使
用条件によつて軸受内部の圧力が変動することに
なるが、シール体30の通気溝34,39を閉塞
している薄肉部35,40の肉厚は、軸受内圧の
変動に追従して弾性変形する厚さになつているか
ら、軸受内圧が所定値以下に低下したときは軸受
内部側に膨出し、その反対に軸受内圧が所定値以
上に上昇したときは軸受外部側に膨出して、シー
ル体30の固定部32の外周縁と外輪10のシー
ル固定溝11との間には、薄肉部35がシール固
定溝11に接触している面ですき間が生じ、シー
ル体30の主リツプ37の内周縁と内輪20のシ
ール摺接溝21との間には、薄肉部40がシール
摺接溝21に接触している面ですき間が生じる。
第1図は、薄肉部35,40が軸受外部側に膨出
した状態を示している。このため、外輪10とシ
ール体30との間では、シール体30の固定部3
2と外輪10のシール固定溝11との間の空間部
13を介し連通している通気溝33,34が、薄
肉部35に生じたすき間を介して軸受外部と連通
して、軸受内外部に開通する通気経路が形成さ
れ、内輪20とシール体30との間では、シール
体30の主リツプ37の通気溝39が薄肉部40
に生じたすき間を介して軸受外部と連通して、軸
受内外部に開通する通気経路が形成されることに
なる。 Therefore, the pressure inside the bearing fluctuates due to temperature changes and other usage conditions during use of the bearing, but The thickness is such that it elastically deforms following fluctuations in bearing internal pressure, so when the bearing internal pressure drops below a predetermined value, it bulges inside the bearing, and conversely, when the bearing internal pressure exceeds a predetermined value, When it rises, it bulges to the outside of the bearing, and between the outer peripheral edge of the fixing part 32 of the seal body 30 and the seal fixing groove 11 of the outer ring 10, there is a surface where the thin part 35 is in contact with the seal fixing groove 11. A gap is generated between the inner peripheral edge of the main lip 37 of the seal body 30 and the seal sliding groove 21 of the inner ring 20 on the surface where the thin wall portion 40 is in contact with the seal sliding groove 21.
FIG. 1 shows a state in which the thin-walled portions 35 and 40 bulge outward from the bearing. Therefore, between the outer ring 10 and the seal body 30, the fixed portion 3 of the seal body 30
2 and the seal fixing groove 11 of the outer ring 10, the ventilation grooves 33 and 34 communicate with the outside of the bearing through the gap created in the thin wall part 35, and the airflow grooves 33 and 34 communicate with the outside of the bearing through the gap created in the thin wall part 35. An open ventilation path is formed, and between the inner ring 20 and the seal body 30, the ventilation groove 39 of the main lip 37 of the seal body 30 is connected to the thin wall portion 40.
A ventilation path is formed that communicates with the outside of the bearing through the gap created between the two, and is open to the inside and outside of the bearing.
このように、軸受内圧が所定値以下また以上に
変動したときは、外輪10および内輪20とシー
ル体30との間に開通された通気経路を経て、軸
受内部への空気の流入、軸受外部への空気の排出
が行われ、軸受内圧を調整することができるか
ら、シール体30の主リツプ37は常に一定の接
触圧でシール摺接溝21に接触し、トルクの増
大、ひいては回転性能の低減が生ずることはな
く、また主リツプ37がシール摺接溝21から外
れて密封性能を損なうという問題も生じない。 In this way, when the internal pressure of the bearing fluctuates below or above a predetermined value, air flows into the inside of the bearing and out of the bearing through the ventilation path opened between the outer ring 10, the inner ring 20, and the seal body 30. Since the air is discharged and the bearing internal pressure can be adjusted, the main lip 37 of the seal body 30 always contacts the seal sliding groove 21 with a constant contact pressure, increasing the torque and reducing the rotational performance. This will not occur, and the problem of the main lip 37 coming off the seal sliding groove 21 and impairing the sealing performance will not occur.
また、軸受内圧の変動が少ない通常の条件で使
用する場合、あるいは軸受の回転停止中において
は、シール体30の固定部32の通気溝34と主
リツプ37の通気溝39とは、いずれもその開口
端が薄肉部35,40によつて閉塞された状態と
なつているから、軸受外部から異物が侵入するこ
とはなく、水のかかる場所や水中で使用する場合
でも水の侵入が阻止され、防水性が高くなるほ
か、軸受外部へのグリースの流出を防止すること
もできる。 Furthermore, when the bearing is used under normal conditions with little variation in internal pressure, or when the bearing is not rotating, both the ventilation groove 34 of the fixed part 32 of the seal body 30 and the ventilation groove 39 of the main lip 37 are Since the open ends are closed by the thin walled portions 35 and 40, foreign matter will not enter from outside the bearing, and water will be prevented from entering even when the bearing is used in a place where it gets wet or underwater. In addition to being highly waterproof, it also prevents grease from leaking to the outside of the bearing.
前記実施例では、シール体の固定側とリツプ側
との双方に通気溝を設けて、通気溝の開口端を薄
肉部で閉塞した軸受について説明したが、シール
体の通気溝を固定側とリツプ側との何れか一方に
設けた軸受についても、前記と同様にこの考案を
適用することができる。 In the above embodiment, a bearing was described in which a ventilation groove was provided on both the fixed side and the lip side of the seal body, and the open end of the ventilation groove was closed with a thin part. This invention can be applied to bearings provided on either side in the same manner as described above.
また、前記実施例のシール体は、軸受の外輪に固
定する型式のものであるが、シール体の内周側に
固定部を、外周側にリツプ部を形成し、軸受の内
輪に密着固定する型式のものについても、前記と
同様の構成にすることができる。In addition, the seal body of the above embodiment is of a type that is fixed to the outer ring of the bearing, but a fixing part is formed on the inner circumference side of the seal body and a lip part is formed on the outer circumference side, so that the seal body is tightly fixed to the inner ring of the bearing. The same configuration as described above can also be used for the other types.
なお、シール体自体についても、その形状、リ
ツプの数、通気溝の形状、大きさ等の細部の構造
については、前記実施例のものに限らず、他の構
造の接触形シール体についても、この考案を適用
することができる。 The details of the structure of the seal body itself, such as its shape, number of lips, shape and size of ventilation grooves, are not limited to those of the above embodiments, but also for contact type seal bodies of other structures. This idea can be applied.
以上説明したしように、この考案の密封装置
は、ころがり軸受の端面側に組み付けられた接触
形シール体の固定側とリツプ側との少なくとも一
方に、軸受の内部と外部とを連通する通気溝を設
け、通気溝の開口端を軸受内圧の変動に追従して
弾性変形する薄肉部によつて閉塞している。した
がつて、この考案によれば、軸受内圧が変動した
ときは、薄肉部が膨出して軸受の内部と外部との
間を連通させる弁体として作用して、空気の流
入、排出が行われるため、内圧調整機構付き密封
装置となるだけでなく、通常の使用条件下におい
ては、軸受外部からの異物や水は薄肉部に阻止さ
れて軸受内部に入り込むことがなくなるから、密
封性能にすぐれたころがり軸受として使用するこ
とができる。
As explained above, the sealing device of this invention has a ventilation groove communicating between the inside and outside of the bearing on at least one of the fixed side and the lip side of the contact type seal body assembled on the end face side of the rolling bearing. The opening end of the ventilation groove is closed by a thin portion that elastically deforms in accordance with fluctuations in the internal pressure of the bearing. Therefore, according to this invention, when the internal pressure of the bearing fluctuates, the thin wall portion swells and acts as a valve body that communicates between the inside and outside of the bearing, allowing air to flow in and out. Therefore, it not only becomes a sealing device with an internal pressure adjustment mechanism, but also has excellent sealing performance because, under normal usage conditions, foreign matter and water from outside the bearing are blocked by the thin wall and do not enter the inside of the bearing. Can be used as a rolling bearing.
第1図は、この考案の実施例を示す上半部縦断
側面図、第2図はシール体の要部を示す背面図で
ある。
図中、10は外輪、11はシール固定溝、20
は内輪、21はシール摺接溝、30はシール体、
32は固定部、33,34は固定部の通気溝、3
5は薄肉部、37は主リツプ、39は主リツプの
通気溝、40は薄肉部である。
FIG. 1 is a longitudinal cross-sectional side view of the upper half of an embodiment of this invention, and FIG. 2 is a rear view showing the main parts of the seal body. In the figure, 10 is an outer ring, 11 is a seal fixing groove, and 20
is the inner ring, 21 is the seal sliding groove, 30 is the seal body,
32 is a fixed part, 33 and 34 are ventilation grooves of the fixed part, 3
5 is a thin wall portion, 37 is a main lip, 39 is a ventilation groove of the main lip, and 40 is a thin wall portion.
Claims (1)
ろがり軸受の固定輪のシール固定溝に密着させて
固定し、リツプ部を回転輪のシール摺接溝に接触
させて組み付けてなり、シール体の固定部のシー
ル固定溝との固定面とリツプ部のシール摺接溝と
の接触面との少なくとも一方に軸受の内外部に連
通する通気溝を設けた密封装置において、前記シ
ール体の固定部とリツプ部との少なくとも一方に
設けた通気溝には、軸受外部に面する側の開口端
を閉塞する薄肉部を設け、該薄肉部の肉厚を軸受
内圧の変動に追従して弾性変形可能な厚さとした
ことを特徴とするころがり軸受の密封装置。 The fixed part of the seal body made of an elastic material such as rubber is fixed in close contact with the seal fixing groove of the fixed ring of the rolling bearing, and the lip part is assembled with the seal sliding contact groove of the rotating ring. In a sealing device in which a ventilation groove communicating with the inside and outside of the bearing is provided on at least one of the fixing surface of the fixing part with the seal fixing groove and the contact surface of the lip part with the seal sliding groove, the fixing part of the seal body and the contact surface with the seal sliding groove of the lip part are provided. The ventilation groove provided on at least one side of the lip portion is provided with a thin wall portion that closes the open end on the side facing the outside of the bearing, and the thickness of the thin wall portion can be elastically deformed to follow fluctuations in the internal pressure of the bearing. A sealing device for a rolling bearing characterized by its thickness.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986081338U JPH0442572Y2 (en) | 1986-05-29 | 1986-05-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986081338U JPH0442572Y2 (en) | 1986-05-29 | 1986-05-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62194215U JPS62194215U (en) | 1987-12-10 |
JPH0442572Y2 true JPH0442572Y2 (en) | 1992-10-08 |
Family
ID=30932985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986081338U Expired JPH0442572Y2 (en) | 1986-05-29 | 1986-05-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0442572Y2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH059533Y2 (en) * | 1987-07-03 | 1993-03-09 | ||
JPH0648186Y2 (en) * | 1988-04-25 | 1994-12-12 | エヌティエヌ株式会社 | Bearing sealing device |
JP2005163900A (en) * | 2003-12-02 | 2005-06-23 | Koyo Seiko Co Ltd | Rolling bearing |
JP4811194B2 (en) * | 2006-08-28 | 2011-11-09 | 日本精工株式会社 | Sealing device for bearing unit and bearing unit |
JP4956138B2 (en) * | 2006-10-25 | 2012-06-20 | 光陽産業株式会社 | Gas stopper |
JP5595692B2 (en) * | 2009-08-27 | 2014-09-24 | Ntn株式会社 | Sealed rolling bearing |
WO2016104556A1 (en) * | 2014-12-25 | 2016-06-30 | 日本精工株式会社 | Air-turbine bearing unit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077818U (en) * | 1983-10-31 | 1985-05-30 | 光洋精工株式会社 | Rolling bearing sealing device |
-
1986
- 1986-05-29 JP JP1986081338U patent/JPH0442572Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS62194215U (en) | 1987-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0535247Y2 (en) | ||
JP2525536Y2 (en) | Sealing device | |
JPH0663541B2 (en) | Bearing seal device | |
JPH0442572Y2 (en) | ||
JP2004044622A (en) | Universal joint boots | |
JP2557032B2 (en) | Spherical rolling bearing with seal | |
JPS6143003Y2 (en) | ||
JP2605197Y2 (en) | Sealing device | |
JPH0726609Y2 (en) | Rolling bearing sealing device | |
WO2004023007A1 (en) | Sealing device | |
US7229356B2 (en) | Boot for universal joint | |
JP4649811B2 (en) | Sealing device | |
JP2003004054A (en) | Sealing system of rolling bearing | |
JPH0828704A (en) | Universal joint boot | |
JPH08232967A (en) | Sealing device for outer ring rotation bearing | |
JPH0647136Y2 (en) | Sealing device | |
JPH0419237Y2 (en) | ||
JPH026303Y2 (en) | ||
JPH0211623Y2 (en) | ||
JPH043159Y2 (en) | ||
JPH0135984Y2 (en) | ||
JPS5936735Y2 (en) | Rolling bearing sealing device | |
JP2597961Y2 (en) | Sealing device | |
JP2535455Y2 (en) | Sealing device | |
JPH0689851B2 (en) | Sealing device assembly |