JPH0211623Y2 - - Google Patents
Info
- Publication number
- JPH0211623Y2 JPH0211623Y2 JP1984046562U JP4656284U JPH0211623Y2 JP H0211623 Y2 JPH0211623 Y2 JP H0211623Y2 JP 1984046562 U JP1984046562 U JP 1984046562U JP 4656284 U JP4656284 U JP 4656284U JP H0211623 Y2 JPH0211623 Y2 JP H0211623Y2
- Authority
- JP
- Japan
- Prior art keywords
- flexible boot
- groove
- lip
- boot
- flexible
- 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
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
- F16D2003/846—Venting arrangements for flexible seals, e.g. ventilation holes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Diaphragms And Bellows (AREA)
Description
【考案の詳細な説明】
本考案は例えば自動車のドライブシヤフトなど
に使用される等速ジヨイントに取付けられるフレ
キシブルブーツに関する。[Detailed Description of the Invention] The present invention relates to a flexible boot that is attached to a constant velocity joint used, for example, in an automobile drive shaft.
フレキシブルブーツは等速ジヨイントの潤滑用
として使用するグリースをその内部に密封保持
し、且つ外部からのダストや水等が該ジヨイント
内に侵入するのを防止する。第１図に示すように
フレキシブルブーツ１は大径側取付部２と小径側
取付部３とそれらの間に在る蛇腹部４からできて
いる。前記大径側取付部２はジヨイント外輪５
に、また小径側取付部３はシヤフト６に装着さ
れ、更にそれぞれ結合バンド７によつて締付け固
定されている。 The flexible boot seals and retains grease used for lubricating the constant velocity joint, and prevents dust, water, etc. from entering the joint from the outside. As shown in FIG. 1, the flexible boot 1 is made up of a large-diameter mounting portion 2, a small-diameter mounting portion 3, and a bellows portion 4 located between them. The large diameter side mounting portion 2 is a joint outer ring 5.
Furthermore, the small-diameter side attachment portion 3 is attached to the shaft 6, and is further tightened and fixed by a coupling band 7, respectively.
フレキシブルブーツに使用されるゴムや樹脂な
どの材料は気体透過性を持ち、フレキシブルブー
ツ内外の圧力差が大きく温度が高いほど気体の透
過量が多い。等速ジヨイントはその回転時に発熱
し約50〜80℃になり、また雰囲気温度はエンジン
の輻射熱などにより上昇し、最高130℃以上に達
することもある。このためフレキシブルブーツ内
部の温度も上昇し100℃以上になる場合がある。
フレキシブルブーツ内部の温度が上昇すると内圧
も上昇し、空気が蛇腹部を透過して内部から外部
へ抜けていく。この透過量（抜け出し）は温度、
圧力及び内圧が上昇していた時間により異なる。
等速ジヨイントが回転を停止するとフレキシブル
ブーツ内部の温度の下降に伴い、空気は運転時と
は逆に外部から内部へ透過するが、フレキシブル
ブーツの温度が低いために前記透過量（抜け出
し）と同じ量の空気が入るには抜け出しに要した
時間とくらべてかなりの時間がかかる。したがつ
て等速ジヨイントの回転停止後に温度が降下して
いくと、ブーツ内には時間の経過とともに負圧を
発生する。この負圧は温度上昇により抜けた空気
の透過量から温度降下により入つた透過量を差引
いた量に対応する。この負圧がフレキシブルブー
ツのへこむ負圧に達するとフレキシブルブーツは
第２図に示すように蛇腹部の山部にへこみを発生
する。したがつて等速ジヨイントすなわちシヤフ
トが再回転を始めるとフレキシブルブーツはへこ
んだままで回転し作動角がついた場合（第３図）
にシヤフト６とジヨイント外輪５との間に、前述
のフレキシブルブーツのへこんだ部分を噛み込み
これを破損させる。 Materials such as rubber and resin used in flexible boots have gas permeability, and the larger the pressure difference between the inside and outside of the flexible boot and the higher the temperature, the more gas permeates. Constant velocity joints generate heat during rotation, reaching temperatures of approximately 50 to 80 degrees Celsius, and the ambient temperature rises due to radiant heat from the engine, and can reach a maximum of 130 degrees Celsius or more. As a result, the temperature inside the flexible boots may rise to over 100°C.
As the temperature inside the flexible boot rises, the internal pressure also rises, and air passes through the bellows and escapes from the inside to the outside. This amount of permeation (escape) is determined by temperature,
It varies depending on the pressure and the time the internal pressure was rising.
When the constant velocity joint stops rotating, the temperature inside the flexible boot decreases, and air permeates from the outside to the inside, contrary to when the boot is in operation. However, because the temperature of the flexible boot is low, the amount of air passing through (escaping) is the same as above. It takes a considerable amount of time for a large amount of air to enter compared to the time required for it to escape. Therefore, as the temperature decreases after the constant velocity joint stops rotating, negative pressure is generated within the boot over time. This negative pressure corresponds to the amount obtained by subtracting the amount of air permeated due to the temperature drop from the amount of air permeated due to the temperature increase. When this negative pressure reaches a negative pressure that causes a dent in the flexible boot, the flexible boot will dent in the crest of the bellows portion, as shown in FIG. Therefore, when the constant velocity joint, that is, the shaft, starts to rotate again, the flexible boot remains recessed and rotates, and the operating angle increases (Figure 3).
The concave portion of the flexible boot is caught between the shaft 6 and the joint outer ring 5, damaging it.
本考案の目的はこのような従来の欠点を解決
し、本来の目的である密封性を損わずに、内部の
圧力がフレキシブルブーツをへこませる負圧にな
らぬような形状を持つたフレキシブルブーツを提
供することである。即ち本考案は、ジヨイント外
輪とジヨイント内輪に貫入固定したシヤフトとを
被締付体として、これら被締付体に両端の取付部
を締付け固定した等速ジヨイント用フレキシブル
ブーツにおいて、少なくとも一方の取付部の内周
面にフレキシブルブーツの内部と外部との連通用
の溝を形成するとともに、該溝と並べてリツプを
形成し、該リツプの先端は、通常時に前記少なく
とも一方の取付部に隣接する被締付体に接触して
該溝を閉鎖しており、フレキシブルブーツの内圧
が所定値以下に低下したときにこの被締付体から
離れて該溝を開口させるようになつていることを
特徴とするフレキシブルブーツを提供する。 The purpose of this invention is to solve these conventional drawbacks, and to create a flexible boot that has a shape that prevents the internal pressure from becoming a negative pressure that would dent the flexible boot, without impairing the original purpose of sealing. It is to provide boots. That is, the present invention provides a flexible boot for constant velocity joints in which the joint outer ring and the shaft inserted into and fixed to the joint inner ring are fastened objects, and the mounting portions at both ends are tightened and fixed to these objects. A groove for communication between the inside and the outside of the flexible boot is formed on the inner circumferential surface of the flexible boot, and a lip is formed in line with the groove, and the tip of the lip is normally connected to the tightened part adjacent to the at least one attachment part. The flexible boot is characterized in that the flexible boot contacts the attached body to close the groove, and when the internal pressure of the flexible boot drops below a predetermined value, the flexible boot separates from the fastened body and opens the groove. Provide flexible boots.
第４図に示す本考案の第１実施例において、フ
レキシブルブーツの大径側取付部２の内周面に軸
方向の貫通溝８を単数又は複数個設けている該溝
８によつてフレキシブルブーツの内部と外部は連
通する。また前記溝８よりフレキシブルブーツの
内部側（図において右側）に環状のリツプ９を形
成している。該リツプ９の先端は通常ジヨイント
外輪５と接触して密封性を保持しているが、ブー
ツがへこむ負圧に達する前に開く必要がある。リ
ツプ９の取付場所は溝８よりも外部側（図におい
て左側）でも良いが溝がグリースでつまる危険が
ある。また、前記溝８は取付部２を結合バンド７
で締付けても十分に内外を連通させる大きさを保
持する必要がある。 In the first embodiment of the present invention shown in FIG. 4, one or more axial through grooves 8 are provided on the inner circumferential surface of the large-diameter mounting portion 2 of the flexible boot. The inside and outside of the are connected. Further, an annular lip 9 is formed on the inner side of the flexible boot (on the right side in the figure) from the groove 8. The tip of the lip 9 normally comes into contact with the joint outer ring 5 to maintain a seal, but it needs to open before reaching a negative pressure that will cause the boot to dent. The lip 9 may be installed outside the groove 8 (on the left side in the figure), but there is a risk that the groove will become clogged with grease. Further, the groove 8 connects the mounting portion 2 to the coupling band 7.
It is necessary to maintain a size that allows sufficient communication between the inside and outside even when tightened.
第５図に示す本考案の第２実施例において、フ
レキシブルブーツの内部と外部とを連通する単数
又は複数の溝８が形成されている。また本実施例
の場合も前記溝８の内側に環状のリツプ９が形成
されている。該リツプは第１実施例のリツプと同
一構造である。また溝８の断面形状は設計に応じ
て種々変更することができる。また図示しないが
前記溝８とリツプ９の位置は特に大径部側に限定
する必要はなく、小径部側あるいはその両方に設
けても良い。更にリツプ９のシール位置すなわち
密封作用を行う位置を第６図の第３実施例を示す
よう、サイドリツプとしてジヨイント外輪５の側
面をシールするようにしても良い。 In a second embodiment of the invention, shown in FIG. 5, one or more grooves 8 are formed which communicate the interior and exterior of the flexible boot. Also in this embodiment, an annular lip 9 is formed inside the groove 8. The lip has the same structure as the lip of the first embodiment. Further, the cross-sectional shape of the groove 8 can be variously changed depending on the design. Further, although not shown, the positions of the groove 8 and the lip 9 do not need to be particularly limited to the large diameter side, and may be provided on the small diameter side or both. Furthermore, the sealing position of the lip 9, that is, the position where the sealing action is performed, may be made into a side lip to seal the side surface of the joint outer ring 5, as shown in the third embodiment shown in FIG.
上述の構成になる本考案のフレキシブルブーツ
はその内部がフレキシブルブーツをへこませる負
圧より小さい負圧P1となつたとき、リツプ９を
拡げようとする力F1は、リツプ９の受圧面積を
ＡとするとF1＝P1Aで示される。リツプの押付力
F2をF1＞F2＞０と設定すると、フレキシブルブ
ーツの内部負圧P1以下の圧力でリツプが開き、
溝８より大気がフレキシブルブーツ内に入り、そ
の内圧は常にフレキシブルブーツを変形させる負
圧に達しない。またF2＞０であるため密封性を
保持できる。 When the inside of the flexible boot of the present invention having the above-mentioned structure becomes a negative pressure P 1 smaller than the negative pressure that would dent the flexible boot, the force F 1 that tries to expand the lip 9 is equal to the pressure-receiving area of the lip 9. Letting A be F 1 =P 1 A. Lip pressing force
If F 2 is set as F 1 > F 2 > 0, the lip will open at a pressure below the internal negative pressure P 1 of the flexible boot.
Atmospheric air enters the flexible boot through the groove 8, and the internal pressure does not always reach the negative pressure that deforms the flexible boot. Furthermore, since F 2 >0, the sealing property can be maintained.
上述の構成作用によつてフレキシブルブーツの
内部負圧は常にP1以下であるため、フレキシブ
ルブーツの山部のへこみが起らず、等速ジヨイン
トに作動角がついてもシヤフト６とジヨイント外
輪５との間にフレキシブルブーツを噛み込み破損
させることがない。 Due to the above-mentioned structural action, the internal negative pressure of the flexible boot is always below P 1 , so the crest of the flexible boot does not dent, and even if the constant velocity joint has an operating angle, the shaft 6 and joint outer ring 5 The flexible boots will not be caught and damaged in between.
第１図は等速ジヨイントに装着した非作動時に
おける従来のフレキシブルブーツの断面図、第２
図及び第３図は作動時における第１図のフレキシ
ブルブーツの断面図、第４図、第５図並びに第６
図はそれぞれ本考案のフレキシブルブーツの第１
実施例第２実施例並びに第３実施例の取付部断面
図である。
１……フレキシブルブーツ、２……大径側取付
部、３……小径側取付部、４……蛇腹部、５……
ジヨイント外輪、６……シヤフト、７……結合バ
ンド、８……溝、９……リツプ。
Figure 1 is a sectional view of a conventional flexible boot attached to a constant velocity joint when not in operation, Figure 2
3 and 3 are cross-sectional views of the flexible boot of FIG. 1, FIGS. 4, 5, and 6 during operation.
Each figure shows the first flexible boot of the present invention.
Embodiments FIG. 3 is a sectional view of a mounting portion of a second embodiment and a third embodiment. 1... Flexible boot, 2... Large diameter side mounting part, 3... Small diameter side mounting part, 4... Bellows part, 5...
Joint outer ring, 6...shaft, 7...coupling band, 8...groove, 9...rip.
Claims (1)
したシヤフト６とを被締付体として、これら被締
付体に両端の取付部を締付け固定した等速ジヨイ
ント用フレキシブルブーツにおいて、少なくとも
一方の取付部の内周面にフレキシブルブーツの内
部と外部との連通用の溝８を形成するとともに、
該溝と並べてリツプ９を形成し、該リツプの先端
は、通常時に前記少なくとも一方の取付部に隣接
する被締付体に接触して該溝を閉鎖しており、フ
レキシブルブーツの内圧が所定値以下に低下した
ときにその被締付体から離れて該溝を開口させる
ようになつていることを特徴とするフレキシブル
ブーツ。 In a flexible boot for a constant velocity joint, in which the joint outer ring 5 and the shaft 6 inserted into and fixed to the joint inner ring are fastened bodies, and the mounting parts at both ends are tightened and fixed to these fastened bodies, the inner periphery of at least one of the mounting parts A groove 8 for communication between the inside and outside of the flexible boot is formed on the surface, and
A lip 9 is formed in line with the groove, and the tip of the lip normally contacts the fastened body adjacent to the at least one attachment part to close the groove, and the internal pressure of the flexible boot is maintained at a predetermined value. 1. A flexible boot, characterized in that the flexible boot is configured to move away from the object to be tightened and open the groove when the temperature decreases to below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984046562U JPS60159231U (en) | 1984-03-30 | 1984-03-30 | Flexible boots for constant velocity joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984046562U JPS60159231U (en) | 1984-03-30 | 1984-03-30 | Flexible boots for constant velocity joints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60159231U JPS60159231U (en) | 1985-10-23 |
| JPH0211623Y2 true JPH0211623Y2 (en) | 1990-03-27 |
Family
ID=30561074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984046562U Granted JPS60159231U (en) | 1984-03-30 | 1984-03-30 | Flexible boots for constant velocity joints |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60159231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008215517A (en) * | 2007-03-05 | 2008-09-18 | Ntn Corp | Constant velocity universal joint |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228276Y2 (en) * | 1986-10-24 | 1990-07-30 | ||
| JP4189648B2 (en) * | 2003-02-25 | 2008-12-03 | Ｎｏｋ株式会社 | Constant velocity joint boots |
| JP5479127B2 (en) * | 2010-01-27 | 2014-04-23 | Ｎｔｎ株式会社 | Constant velocity universal joint |
-
1984
- 1984-03-30 JP JP1984046562U patent/JPS60159231U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008215517A (en) * | 2007-03-05 | 2008-09-18 | Ntn Corp | Constant velocity universal joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60159231U (en) | 1985-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3066746B2 (en) | Universal joint with bellows connection | |
| JPS5927544Y2 (en) | Sealing device for trunnion pin bearing of cardan joint | |
| US20050101390A1 (en) | Constant velocity joint vent valve | |
| JPS6211235B2 (en) | ||
| US5183351A (en) | Boot retainer for a mechanical joint | |
| JPS6323010B2 (en) | ||
| US4243232A (en) | One-piece oil seal and boot seal | |
| JPH0211623Y2 (en) | ||
| US8157657B2 (en) | Selectively expandable and contractible barrier | |
| US6939051B2 (en) | Bearing arrangement for a shaft | |
| JPH0442572Y2 (en) | ||
| JPH0237287Y2 (en) | ||
| JPH0228277Y2 (en) | ||
| JPH0542837U (en) | Constant velocity joint boots for automobile propeller rafts | |
| JPS5917288B2 (en) | Ventilation device for ventilating the internal cavity of synchronous rotary joints | |
| JPH0228276Y2 (en) | ||
| JPS6220743Y2 (en) | ||
| JPS5814281Y2 (en) | Seal ring shaft sealing device | |
| JPS631084Y2 (en) | ||
| JP2006275241A (en) | Constant velocity universal joint | |
| JPH0117728Y2 (en) | ||
| JP2012233542A (en) | Power transmission shaft | |
| JPS6014055Y2 (en) | Shaft sealing device | |
| JPS6342204Y2 (en) | ||
| JPH082502Y2 (en) | Ventilation mechanism of joint part |