JPH082502Y2 - Ventilation mechanism of joint part - Google Patents
Ventilation mechanism of joint partInfo
- Publication number
- JPH082502Y2 JPH082502Y2 JP1985095689U JP9568985U JPH082502Y2 JP H082502 Y2 JPH082502 Y2 JP H082502Y2 JP 1985095689 U JP1985095689 U JP 1985095689U JP 9568985 U JP9568985 U JP 9568985U JP H082502 Y2 JPH082502 Y2 JP H082502Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- joint
- cylindrical portion
- rubber boot
- spline teeth
- 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 - Lifetime
Links
Landscapes
- Sealing Devices (AREA)
- Diaphragms And Bellows (AREA)
- Motor Power Transmission Devices (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、ゴムブーツ等の被包により密閉された継手
の内部を、外気に連通させる継手部の通気機構に関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a ventilation mechanism of a joint portion that allows the inside of a joint sealed by an envelope such as a rubber boot to communicate with the outside air.
〈従来の技術〉 FF車（前置きエンジン・前輪駆動車）におけるエンジ
ンと駆動輪との間には、エンジンの回転動力の伝達に等
速ボールジヨイントなど自在継手が用いられている。す
なわち、エンジンのクランク側より延びるインナシヤフ
トはベアリングにより車体側に支持されており、一方駆
動輪側に連結されるドライブシヤフトは駆動輪と共に上
下動するため、両者は自在継手により相互の軸交角が変
えられるように取り付けられている。そして自在継手の
全体は、自在継手内への水やほこり等の侵入を防止する
ため、ゴムブーツ等により外気に対して密閉された状態
となつている。<Prior Art> In an FF vehicle (front-mounted engine / front-wheel drive vehicle), a universal joint such as a constant velocity ball joint is used to transmit rotational power of the engine between the engine and the drive wheels. That is, the inner shaft extending from the crank side of the engine is supported by the bearing on the vehicle body side, while the drive shaft connected to the drive wheel side moves up and down together with the drive wheel, so that the two shafts have a universal joint so that the mutual shaft intersection angle is large. It is attached so that it can be changed. The entire universal joint is kept sealed from the outside by rubber boots or the like in order to prevent water, dust, etc. from entering the universal joint.
〈考案が解決しようとする問題点〉 しかしながら、内部を気密状態においた自在継手では
雨やほこりの侵入を防げるが、作動中に発生した熱や、
排気管やエンジン等高温の物体からの伝達熱により内部
温度が上昇し、内部の気体が膨張すると気体の流出手段
がなく、ゴムブーツの膨満が引き起こされる。このよう
な膨満が起こると、ゴムブーツが作動中に隣接箇所に接
触して損傷し防水性等機能が損なわれる。又、かかる膨
満状態に長く置いた結果自在継手各部の間隙より内部空
気が徐々に流出し、停止後ゴムブーツ内が冷却されて減
圧状態になると、逆にゴムブーツの収縮変形が起こり、
この膨満と収縮の交互の変形がゴムブーツに繰り返され
ると、ゴムを疲労させ、劣化を早めてゴムブーツの耐久
性を著しく悪化させるという問題点があつた。<Problems to be solved by the invention> However, a universal joint having an airtight inside can prevent rain and dust from entering, but heat generated during operation,
When the internal temperature rises due to the heat transferred from a high-temperature object such as an exhaust pipe or an engine, and the gas inside expands, there is no means for the gas to flow out and the rubber boot expands. If such swelling occurs, the rubber boot comes into contact with an adjacent portion during operation and is damaged, which impairs the waterproof function and the like. Also, as a result of leaving it in such a fully expanded state for a long time, internal air gradually flows out from the gaps of the various parts of the universal joint, and after stopping, when the inside of the rubber boot is cooled and becomes in a reduced pressure state, conversely, the rubber boot contracts and deforms,
If the rubber boot is repeatedly subjected to the alternating deformation of swelling and contraction, it causes fatigue of the rubber and accelerates the deterioration of the rubber boot, resulting in a marked deterioration of the durability of the rubber boot.
〈問題点を解決するための手段〉 そこで本考案は、内周面に形成した複数のスプライン
歯と第１シャフトの外周に形成した複数のスプライン歯
とを噛み合わせることにより第１シャフトと連結される
と共に第２シャフトと継手を介して連結された円筒部
と、前記第２シャフトと前記円筒部との間に設けられ
て、前記継手を封止するゴムブーツと、該円筒部の内部
で前記継手側と上記第１シャフト側とを仕切るように取
り付けられた封止部材とを備えた継手部において、上記
封止部材の上記第１シャフトの軸心と一致する箇所の近
傍に上記円筒部の継手側内部と上記円筒部外部とを連通
する空気孔を設けると共に、上記円筒部の内周面に形成
した複数のスプライン歯と上記第１シャフトの外周に形
成した複数のスプライン歯のうち少なくとも一つの歯を
除去したのである。<Means for Solving the Problems> Therefore, according to the present invention, a plurality of spline teeth formed on the inner peripheral surface and a plurality of spline teeth formed on the outer periphery of the first shaft are meshed with each other to be connected to the first shaft. And a cylindrical portion connected to the second shaft via a joint, a rubber boot provided between the second shaft and the cylindrical portion to seal the joint, and the joint inside the cylindrical portion. Side and a sealing member attached so as to partition the first shaft side, a joint of the cylindrical portion in the vicinity of a portion of the sealing member that coincides with the axis of the first shaft. At least one of a plurality of spline teeth formed on the inner peripheral surface of the cylindrical portion and a plurality of spline teeth formed on the outer periphery of the first shaft is provided while providing an air hole that communicates the inside of the side and the outside of the cylindrical portion. I removed two teeth.
〈実施例〉 以下、本考案の一実施例を図面を用いて説明する。<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.
第１図に示す継手は、エンジン側に連結されるインナ
シヤフト２と駆動輪側に回転力を伝達するドライブシヤ
フト３とを連結する等速ボールジヨイント１である。前
記インナシヤフト２は先端に刻設されたスプラインによ
り等速ボールジヨイント１の外枠４に嵌合しており、そ
の嵌合部分手前を支持部材５に設けられたベアリング６
に支持されている。ベアリング６は内輪と外輪との間に
シール材が設けられたシールタイプであり、このベアリ
ング６の前後には支持部材５と外枠４及び支持部材５と
インナシヤフト２との間を封止する第一オイルシール７
及び第二オイルシール８が取り付けられている。外枠４
は前記インナシヤフト２と嵌合する連結部4aと、この連
結部4aに続くこれより径の大きい円筒部4bとから成つて
おり、円筒部4bの内部においてドライブシヤフト３がボ
ールを介して外枠４に連結されている。かようにボール
を介して外枠４にドライブシヤフト３が連結されている
ことから、外枠４の軸心に対して斜め方向にドライブシ
ヤフト３が置かれていてもドライブシヤフト３に外枠４
の回転が正確に伝達される。外枠４のドライブシヤフト
３側の端部には蛇腹状のゴムブーツ９が設けられ、この
ゴムブーツ９により外枠４の端部とドライブシヤフト３
との間隙が封止され、又外枠４の円筒部4bと連結部4aと
の間には円筒部4bからのグリスの流出を防止する封止部
材10が取り付けられて、ボールを有する等速ボールジヨ
イント１内部がこれらにより包囲されている。11は、ゴ
ムブーツ９の周囲に巻装されてゴムブーツ９を締結させ
るバンドである。The joint shown in FIG. 1 is a constant velocity ball joint 1 which connects an inner shaft 2 which is connected to the engine side and a drive shaft 3 which transmits a rotational force to the drive wheels. The inner shaft 2 is fitted to the outer frame 4 of the constant velocity ball joint 1 by a spline carved at the tip, and the bearing 6 provided on the support member 5 is located in front of the fitting portion.
Supported by. The bearing 6 is a seal type in which a sealing material is provided between the inner ring and the outer ring, and the support member 5 and the outer frame 4, and the support member 5 and the inner shaft 2 are sealed before and after the bearing 6. First oil seal 7
And the second oil seal 8 is attached. Outer frame 4
Is composed of a connecting portion 4a that fits with the inner shaft 2 and a cylindrical portion 4b that follows the connecting portion 4a and has a larger diameter than the connecting portion 4a. Inside the cylindrical portion 4b, the drive shaft 3 has an outer frame via balls. Connected to four. Since the drive shaft 3 is connected to the outer frame 4 via the balls as described above, even if the drive shaft 3 is placed in an oblique direction with respect to the axis of the outer frame 4, the outer frame 4 is attached to the drive shaft 3.
Is accurately transmitted. A bellows-shaped rubber boot 9 is provided at the end of the outer frame 4 on the drive shaft 3 side, and the rubber boot 9 allows the end of the outer frame 4 and the drive shaft 3 to be driven.
And a sealing member 10 for preventing the grease from flowing out from the cylindrical portion 4b is mounted between the cylindrical portion 4b of the outer frame 4 and the connecting portion 4a, so that the ball has a constant velocity. The interior of the ball joint 1 is surrounded by these. A band 11 is wound around the rubber boot 9 and fastens the rubber boot 9.
このように構成された等速ボールジヨイント１の本考
案における特徴的な点について次に述べる。The characteristic points of the present invention of the constant velocity ball joint 1 thus configured will be described below.
前記外枠４の円筒部4bと連結部4aとの間に設けられた
封止部材10には、表裏を貫通する孔部12が略中央に設け
られている。内面にスプライン歯が設けられてインナシ
ヤフト２とスプライン嵌合している連結部4aには、第２
図に示すように内面のスプライン歯の少なくとも一枚が
除去されており、このことによりこの嵌合部分において
軸方向に隙間14が形成されている。そして連結部4aのイ
ンナシヤフト２側の端面、すなわちベアリング６との当
接面には半径方向に溝部が設けられて連結部4aの外側と
前記隙間14とを連通する連通路15が形成されており、か
つベアリング６と第一オイルシール７との間より外部に
開口部を有する連通孔16が支持部材５に穿設されてい
る。尚前記隙間14は連結部4aの内面でなくインナシヤフ
ト２の外周のスプライン歯を除去して形成してもよい。The sealing member 10 provided between the cylindrical portion 4b and the connecting portion 4a of the outer frame 4 is provided with a hole portion 12 penetrating the front and back sides at substantially the center. The connecting portion 4a, which has spline teeth on the inner surface and is spline-fitted with the inner shaft 2, has a second
As shown in the figure, at least one of the spline teeth on the inner surface has been removed, which forms a gap 14 in the axial direction at this fitting portion. A groove portion is provided in the radial direction on the end surface of the connecting portion 4a on the inner shaft 2 side, that is, the contact surface with the bearing 6 to form a communication passage 15 that communicates the outside of the connecting portion 4a with the gap 14. Further, a communication hole 16 having an opening outside the bearing 6 and the first oil seal 7 is formed in the support member 5. The gap 14 may be formed by removing the spline teeth on the outer periphery of the inner shaft 2 instead of the inner surface of the connecting portion 4a.
以上のように構成されているため、等速ボールジヨイ
ント１の内部の温度が上昇した場合、その温度上昇に伴
なつて内部空気が膨張しても、空気は封止部材10に設け
られた孔部12より連結部4a側へ流出し、嵌合部分に設け
られた隙間14を通り連結部4aのベアリング６側端部に達
し、そこより溝部を通つて第一オイルシール７とベアリ
ング６との間に出て、支持部材５に設けられた連通孔16
より外部に流出する。又、温度が下降し冷却される際に
は、以上述べたと逆の経路に従つて等速ボールジヨイン
ト１の内部に空気が流入し、内部の気圧は常に外気に等
しく設定される。そのため、ゴムブーツ９が内部空気の
膨張により膨満したり、又膨満の後に収縮することがな
く、ゴムブーツ９の損傷や劣化によつて寿命が短縮する
ようなことがない。又、この通気流路は狭くかつ各所に
おいて折曲しているため、空気の流通は許容しても、水
分の侵入やグリスの流出等は起こることがない。しかも
ベアリング６にはシールが組み込まれているので、たと
えこの部分に水分の侵入が起こつてもボールレース面に
水分やほこりが付着してベアリング６の機能が損なわれ
るようなことはない。With the above configuration, when the temperature inside the constant velocity ball joint 1 rises, the air is provided in the sealing member 10 even if the internal air expands due to the temperature rise. It flows out from the hole 12 to the side of the connecting portion 4a, passes through the gap 14 provided in the fitting portion, reaches the end of the connecting portion 4a on the bearing 6 side, and then passes through the groove portion to reach the first oil seal 7 and the bearing 6. And the communication hole 16 provided in the support member 5
More outflow. Further, when the temperature is lowered and cooled, air flows into the inside of the constant velocity ball joint 1 along the route reverse to that described above, and the atmospheric pressure inside is always set equal to the outside air. Therefore, the rubber boot 9 does not expand due to the expansion of the internal air, or does not contract after the expansion, and the life of the rubber boot 9 is not shortened due to damage or deterioration of the rubber boot 9. Further, since this ventilation passage is narrow and bent at various places, the inflow of water and the outflow of grease do not occur even though the flow of air is allowed. Moreover, since the seal is incorporated in the bearing 6, even if moisture intrudes into this portion, the function of the bearing 6 will not be impaired by moisture or dust adhering to the ball race surface.
尚、本実施例では等速ボールジヨイント１に関して述
べたが、本考案はこれに限定されるものではなく、又、
継手の取り付け箇所についてもFF車であつてインナシヤ
フト２とドライブシヤフト３間に限定されるものではな
い。Although the constant velocity ball joint 1 has been described in the present embodiment, the present invention is not limited to this.
The installation location of the joint is not limited to between the inner shaft 2 and the drive shaft 3 in the FF vehicle.
〈考案の効果〉 本考案によれば、ゴムブーツに被包された継手の内部
を外気と連通させる通気機構が以上述べた如く継手部に
設けられているので継手内部の温度が上昇した場合にお
いて、内部にて膨張した空気を当該通気機構を通して外
部に放出することができ、ゴムブーツの膨満や、又膨満
を原因とする収縮が防止でき、ゴムブーツが隣接箇所に
接触して損傷したり、疲労・劣化による耐久性の悪化を
防止することができる。更に、空気孔は封止部材の略中
央、つまり、第１、第２シャフトの軸線上に設けたた
め、継手の回転に際して、遠心力によりグリースが円筒
部の周囲に移動して空気孔の周辺に付着しにくい。この
為、グリースが空気孔より洩れにくくなり、また、グリ
ースによって空気孔等に目詰まりしにくくなるという利
点がある。<Effect of the Invention> According to the present invention, since the ventilation mechanism for communicating the inside of the joint covered with the rubber boot with the outside air is provided in the joint as described above, when the temperature inside the joint increases, The air that has expanded inside can be released to the outside through the ventilation mechanism, and it is possible to prevent the rubber boot from swelling or contraction due to the swelling. It is possible to prevent deterioration of durability due to. Further, since the air hole is provided substantially in the center of the sealing member, that is, on the axis of the first and second shafts, when the joint rotates, the grease moves to the periphery of the cylindrical portion due to the centrifugal force, and the grease is distributed around the air hole. Difficult to attach. Therefore, there is an advantage that the grease is less likely to leak from the air holes, and the air holes and the like are less likely to be clogged with the grease.
第１図は本考案の一実施例にかかる継手部を示す部分断
面図、第２図は第１図のＺ−Ｚ線の断面図である。 図面中、 １は等速ボールジヨイント、２はインナシヤフト、３は
ドライブシヤフト、４は外枠、4aは連結部、５は支持部
材、９はゴムブーツ、10は封止部材、12は孔部、14は隙
間、15は連通路、16は連通孔である。FIG. 1 is a partial sectional view showing a joint portion according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line ZZ of FIG. In the drawings, 1 is a constant velocity ball joint, 2 is an inner shaft, 3 is a drive shaft, 4 is an outer frame, 4a is a connecting portion, 5 is a supporting member, 9 is a rubber boot, 10 is a sealing member, 12 is a hole. , 14 are gaps, 15 is a communication passage, and 16 is a communication hole.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−12261（ＪＰ，Ａ) 実開 昭58−36632（ＪＰ，Ｕ) 実開 昭56−166361（ＪＰ，Ｕ) 実開 昭58−16432（ＪＰ，Ｕ) 実開 昭57−8323（ＪＰ，Ｕ) 特公 昭57−10282（ＪＰ，Ｂ２) 実公 昭37−4526（ＪＰ，Ｙ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-55-12261 (JP, A) real-open Sho-58-36632 (JP, U) real-open Sho-56-166361 (JP, U) real-open Sho-58- 16432 (JP, U) Actual development 57-8323 (JP, U) Special public 57-10282 (JP, B2) Actual public 37-4526 (JP, Y1)
Claims (1)
１シャフトの外周に形成した複数のスプライン歯とを噛
み合わせることにより第１シャフトと連結されると共に
第２シャフトと継手を介して連結された円筒部と、 前記第２シャフトと前記円筒部との間に設けられて、前
記継手を封止するゴムブーツと、 該円筒部の内部で上記継手側と上記第１シャフト側とを
仕切るように取り付けられた封止部材とを備えた継手部
において、上記封止部材の上記第１シャフトの軸心と一
致する箇所の近傍に上記円筒部の継手側内部と上記円筒
部外部とを連通する空気孔を設けると共に、上記円筒部
の内周面に形成した複数のスプライン歯と上記第１シャ
フトの外周に形成した複数のスプライン歯のうち少なく
とも一つの歯を除去したことを特徴とする継手部の通気
機構。1. A plurality of spline teeth formed on the inner peripheral surface and a plurality of spline teeth formed on the outer periphery of the first shaft are meshed with each other to be connected to the first shaft and through a joint with the second shaft. A coupled cylindrical portion, a rubber boot that is provided between the second shaft and the cylindrical portion and seals the joint, and partitions the joint side and the first shaft side inside the cylindrical portion. In the joint portion including the sealing member attached as described above, the inside of the joint portion of the cylindrical portion and the outside of the cylindrical portion communicate with each other in the vicinity of a portion of the sealing member that coincides with the axis of the first shaft. And a plurality of spline teeth formed on the inner peripheral surface of the cylindrical portion and a plurality of spline teeth formed on the outer periphery of the first shaft are removed. Hand portion of the venting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985095689U JPH082502Y2 (en) | 1985-06-26 | 1985-06-26 | Ventilation mechanism of joint part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985095689U JPH082502Y2 (en) | 1985-06-26 | 1985-06-26 | Ventilation mechanism of joint part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS624623U JPS624623U (en) | 1987-01-12 |
| JPH082502Y2 true JPH082502Y2 (en) | 1996-01-29 |
Family
ID=30960521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985095689U Expired - Lifetime JPH082502Y2 (en) | 1985-06-26 | 1985-06-26 | Ventilation mechanism of joint part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082502Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5222210B2 (en) * | 2009-04-13 | 2013-06-26 | 本田技研工業株式会社 | Motor shaft joint and electric steering device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5816432U (en) * | 1981-07-16 | 1983-02-01 | 富士重工業株式会社 | Constant velocity shaft joint internal pressure control device |
-
1985
- 1985-06-26 JP JP1985095689U patent/JPH082502Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS624623U (en) | 1987-01-12 |
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