JPH0228275Y2 - - Google Patents
Info
- Publication number
- JPH0228275Y2 JPH0228275Y2 JP1985183249U JP18324985U JPH0228275Y2 JP H0228275 Y2 JPH0228275 Y2 JP H0228275Y2 JP 1985183249 U JP1985183249 U JP 1985183249U JP 18324985 U JP18324985 U JP 18324985U JP H0228275 Y2 JPH0228275 Y2 JP H0228275Y2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- sub
- boot
- air communication
- center
- 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
- 239000000428 dust Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006557 surface reaction Methods 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
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】
１ 考案の目的
(イ) 産業上の利用分野
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
キシブルブーツにおいて、特にブーツ内外を連通
する空気連通孔を有し、しかも該空気連通路より
水、ダスト等が主室内に浸入しないようにするた
めに設けた副室を持つフレキシブルブーツに関す
る。[Detailed description of the invention] 1. Purpose of the invention (a) Industrial application field The present invention is particularly applicable to flexible boots that are attached to constant velocity joints used in automobile drive shafts, etc. The present invention relates to a flexible boot having a hole and an auxiliary chamber provided to prevent water, dust, etc. from entering the main chamber from the air communication path.
(ロ) 従来の技術
従来、等速ジヨイント等に使用されているブー
ツの一つのタイプとして副室付ブーツ（第５図、
第６図参照）がある。ブーツ内部の温度変化、容
積変化あるいは気体透過などでブーツ内部の圧力
が変化し蛇腹部が異状変形する。これを防止する
ためにブーツの内外を連通する孔を設けている。
この孔から水やダスト等が浸入してブーツの主室
内へ至ることを防止するために主室１とは別に副
室２を設け、ここに空気連通孔４を設けている。
ブーツの大端側はジヨイント外方部材８に取付け
られ、小端側は軸６に取付けられている。主室１
はくびれた部分である中間部７によつて副室２と
分かれている。前記中間部７は回転軸６に装着さ
れ、ここには両室を結ぶ空気連通路３が一本ある
いは複数本設けられている。副室を持たないブー
ツと比較し、副室付ブーツは、水やダスト等が直
接主室内に浸入することがなく、また副室内に浸
入した水やダクト等は、回転運動に伴う遠心力に
より、主室１に入る前にブーツの外部へ排出され
る。(b) Conventional technology One type of boots conventionally used for constant velocity joints, etc. is a boot with a subchamber (see Fig. 5).
(See Figure 6). The pressure inside the boot changes due to changes in temperature, volume, or gas permeation inside the boot, causing abnormal deformation of the bellows part. To prevent this, holes are provided to communicate between the inside and outside of the boot.
In order to prevent water, dust, etc. from entering through this hole and reaching the main chamber of the boot, a sub-chamber 2 is provided separately from the main chamber 1, and an air communication hole 4 is provided in this sub-chamber 2.
The large end of the boot is attached to the joint outer member 8, and the small end is attached to the shaft 6. Main room 1
It is separated from the auxiliary chamber 2 by a middle part 7 which is a constricted part. The intermediate portion 7 is attached to the rotating shaft 6, and is provided with one or more air communication passages 3 connecting both chambers. Compared to boots without an auxiliary chamber, boots with an auxiliary chamber prevent water and dust from directly entering the main chamber, and water and ducts that enter the auxiliary chamber are prevented by centrifugal force caused by rotational movement. , is discharged to the outside of the boot before entering the main chamber 1.
(ハ) 考案の課題
従来の副室付ブーツは、前記副室２は回転軸６
の中心と同心の真円形（第６図参照）であるた
め、副室内面に存在する水やダスト等は、それに
作用する遠心力が副室内面に対し垂直に働き移動
せずに空気連通孔４より飛びだしにくい。また副
室内面は滑らかであるから水やダスト等に対し運
動が伝達されにくく、回転初期や低速回転時にお
いては水やダスト等は回転運動に至らず、空気連
通孔４より排出される遠心力を得ることができな
い。以上の説明に示すように副室２内に浸入した
水やダスト等の排出が不充分となり、それ等が主
室１内へ浸入するのでブーツ本来の役割を維持で
きない欠点がある。(c) Problems with the invention In the conventional boot with a sub-chamber, the sub-chamber 2 is connected to the rotating shaft 6.
Since it is a perfect circle concentric with the center of the auxiliary chamber (see Figure 6), the centrifugal force acting on the water and dust inside the auxiliary chamber is perpendicular to the auxiliary chamber surface, preventing it from moving and flowing through the air communication hole. It is harder to jump out than 4. In addition, since the inner surface of the sub-chamber is smooth, motion is not easily transmitted to water, dust, etc., and at the beginning of rotation or during low-speed rotation, water, dust, etc. do not reach rotational motion, and the centrifugal force is discharged from the air communication hole 4. can't get it. As described above, water, dust, etc. that have entered the auxiliary chamber 2 are not sufficiently discharged and enter the main chamber 1, so that the boot cannot maintain its original role.
したがつて本考案は副室内に浸入した水、ダス
ト等を遠心力の作用により完全除去できるように
した副室を備えたブーツを提供することを課題と
する。 Therefore, an object of the present invention is to provide a boot equipped with a subchamber in which water, dust, etc. that have entered the subchamber can be completely removed by the action of centrifugal force.
２ 考案の構成
(イ) 課題を解決するための手段
上記の課題を解決するために講じた手段は、回
転軸の中心から副室内面までの距離を全周にわた
つて不均等にし、副室の回転軸の中心から最も離
れた位置に副室内外を連通する空気連通孔を設け
る。2. Structure of the invention (a) Means for solving the problem The means taken to solve the above problem is to make the distance from the center of the rotating shaft to the inside of the subchamber uneven over the entire circumference, An air communication hole communicating between the inside and outside of the sub-chamber is provided at the farthest position from the center of the rotation axis.
(ロ) 作 用
副室内面は回転軸の中心から不均等距離に在る
ため、該内面に存在する水やダスト等に対して働
く遠心力は、第７図、８図に示す如く、回転軸の
中心と副室の中心とを結ぶ延長線上以外の位置で
は、副室内面に対して垂直に働かない。(b) Effect Since the inner surface of the subchamber is located at an uneven distance from the center of the rotating shaft, the centrifugal force acting on water, dust, etc. existing on the inner surface will cause the rotational force to increase as shown in Figures 7 and 8. It does not work perpendicularly to the inside of the sub-chamber at positions other than on the extended line connecting the center of the shaft and the center of the sub-chamber.
回転運動の軌道を定める向心力は副室内の物体
（水、ダスト等）においては副室内面と物体との
間に生じる面の反力−ａにより補われるが、面に
よる反力は常に面と垂直に働くため、面に垂直で
ない遠心力｜Ｆ｜に対しては第８図のように遠心
力の一部を打ち消すだけの力しか生じない。した
がつて面に垂直ではない遠心力｜Ｆ｜にはベクト
ル分解（｜Ｆ｜＝ａ＋ｂ）による遠心力の分力ｂ
が生じる。 The centripetal force that determines the trajectory of rotational motion is compensated for by the surface reaction force -a generated between the inside of the subchamber and the object in the case of an object (water, dust, etc.) inside the subchamber, but the reaction force due to the surface is always perpendicular to the surface. Therefore, for centrifugal force |F| that is not perpendicular to the plane, only a force that cancels out a part of the centrifugal force is generated as shown in Figure 8. Therefore, the centrifugal force |F| which is not perpendicular to the surface has a component force b of the centrifugal force due to vector decomposition (|F|=a+b)
occurs.
この遠心力の分力ｂによる副室内の水、ダスト
等は副室内面上を空気連通孔に向かつて移動す
る。 Water, dust, etc. in the subchamber due to component b of this centrifugal force move on the surface of the subchamber toward the air communication hole.
(ハ) 実施例
本考案の実施例を第１図、第２図に示す。第５
図の従来例と同様にブーツは中間部７によつて主
室１と副室２とに分割され、この両室は回転軸に
沿つた空気連通路３によつて連結している。副室
２の断面形状は第２図に示すよう、副室２の内面
中心は回転軸の中心に対し同心円でなく偏心して
いる。回転軸の中心から最も離れた副室内面上の
位置に空気連通孔４を設けている。副室の内面の
中心と回転軸の中心とのずらし量はブーツの大き
さにより任意に変化するが、ずらし量が最大の場
合でも回転軸が副室の内面に接触しないようにす
る必要がある。空気連通孔４の数は単数又は複数
である。(c) Example An example of the present invention is shown in FIGS. 1 and 2. Fifth
Similar to the conventional example shown in the figure, the boot is divided by an intermediate portion 7 into a main chamber 1 and a sub-chamber 2, and these two chambers are connected by an air communication path 3 along the rotation axis. As shown in FIG. 2, the cross-sectional shape of the auxiliary chamber 2 is such that the center of the inner surface of the auxiliary chamber 2 is not concentric with the center of the rotating shaft but eccentric. An air communication hole 4 is provided at a position on the inner surface of the sub-chamber farthest from the center of the rotating shaft. The amount of deviation between the center of the inner surface of the sub-chamber and the center of the rotating shaft can be arbitrarily changed depending on the size of the boot, but it is necessary to prevent the rotating shaft from touching the inner surface of the sub-chamber even when the amount of deviation is maximum. . The number of air communication holes 4 is single or plural.
第３図に示す実施例において副室の断面形状は
楕円形である。この場合も２個の空気連通孔４が
回転軸の中心より最も離れた副室内面上の位置に
設けられている。 In the embodiment shown in FIG. 3, the subchamber has an elliptical cross-sectional shape. In this case as well, the two air communication holes 4 are provided at positions on the inner surface of the sub-chamber farthest from the center of the rotating shaft.
第４図に示す実施例の形状にすることによつて
副室のゴム材料を低減することができる。この場
合も空気連通孔４が最も遠い位置に設けられてい
る。 By adopting the shape of the embodiment shown in FIG. 4, the amount of rubber material in the subchamber can be reduced. In this case as well, the air communication hole 4 is provided at the farthest position.
副室内面に存在する水やダスト等は回転軸の回
転に伴う遠心力のため副室の内面に押しつけられ
る。水やダスト等の粒子に作用する遠心力は回転
中心から放射状方向であり、その分力によつて水
やダスト等は副室内面に沿つて移動し結局回転中
心から最も離れた空気連通孔４に達し、ここから
遠心力によりこの孔からブーツの外部へ飛散させ
られる。 Water, dust, etc. existing inside the sub-chamber are pressed against the inner surface of the sub-chamber due to the centrifugal force caused by the rotation of the rotating shaft. The centrifugal force that acts on particles such as water and dust is in a radial direction from the center of rotation, and due to this force, the water and dust move along the inner surface of the sub-chamber and end up in the air communication hole 4 furthest from the center of rotation. , and from there, centrifugal force scatters the particles out of the boot through this hole.
３ 考案の効果
副室内部に浸入した水やダスト等は副室内に残
留することなく外部へ排出される。すなわち副室
２内から連通路３を通じて主室１内へ浸入するこ
とは全くなくなり、したがつてジヨイント部の腐
蝕やダストの噛み込みによる円滑な作動に対する
障害やグリースの劣化作用を引き起こさずに、ブ
ーツ内外の空気を連通でき、ブーツ内圧の変化に
伴う蛇腹部の異状変形等が完全に防止される。3. Effects of the invention Water, dust, etc. that have entered the auxiliary chamber are discharged outside without remaining in the auxiliary chamber. In other words, there is no possibility of infiltration from the auxiliary chamber 2 into the main chamber 1 through the communication path 3, and therefore, there is no interference with smooth operation due to corrosion of joints or entrapment of dust, and there is no deterioration of the grease. Air can be communicated between the inside and outside of the boot, and abnormal deformation of the bellows part due to changes in internal pressure of the boot is completely prevented.
第１図は等速ジヨイントに装着した本考案のフ
レキシブルブーツの軸方向断面図、第２図は第１
図の線−における断面図、第３図と第４図は
それぞれ本考案の別の実施例の副室の断面図、第
５図は従来のフレキシブルブーツの軸方向断面
図、第６図は第５図の線−における断面図で
ある。第７図は遠心力の作用を説明する図、第８
図は第７図のＡ部詳細である。
１……主室、２……副室、３……空気連通路、
４……空気連通孔、６……回転軸、７……中間
部。
Figure 1 is an axial sectional view of the flexible boot of the present invention attached to a constant velocity joint, and Figure 2 is an axial cross-sectional view of the flexible boot of the present invention attached to a constant velocity joint.
3 and 4 are respectively sectional views of the subchamber of another embodiment of the present invention, FIG. 5 is an axial sectional view of a conventional flexible boot, and FIG. 6 is a sectional view taken along the line -. 5 is a sectional view taken along the line - in FIG. 5; FIG. Figure 7 is a diagram explaining the action of centrifugal force, Figure 8
The figure shows details of part A in FIG. 7. 1...Main room, 2...Sub-chamber, 3...Air communication path,
4... Air communication hole, 6... Rotating shaft, 7... Intermediate portion.
Claims (1)
を有し、該副室に空気連通孔を備えたフレキシブ
ルブーツにおいて、軸中心から副室内面までの距
離を全周にわたつて不均等にし、軸中心から最も
遠く離れた前記副室に前記空気連通孔を設けたこ
とを特徴とするフレキシブルブーツ。 In a flexible boot used for constant velocity joints, etc., which has a bellows part and a sub-chamber, and the sub-chamber is equipped with an air communication hole, the distance from the center of the shaft to the inside of the sub-chamber is made uneven over the entire circumference. . A flexible boot, characterized in that the air communication hole is provided in the sub-chamber farthest from the shaft center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985183249U JPH0228275Y2 (en) | 1985-11-28 | 1985-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985183249U JPH0228275Y2 (en) | 1985-11-28 | 1985-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6291028U JPS6291028U (en) | 1987-06-10 |
| JPH0228275Y2 true JPH0228275Y2 (en) | 1990-07-30 |
Family
ID=31129812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985183249U Expired JPH0228275Y2 (en) | 1985-11-28 | 1985-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0228275Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8834279B2 (en) | 2012-03-14 | 2014-09-16 | Dana Automotive Systems Group, Llc | Shaft assembly for a constant velocity joint |
-
1985
- 1985-11-28 JP JP1985183249U patent/JPH0228275Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6291028U (en) | 1987-06-10 |
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