JPH109371A - Seal structure of oil passage - Google Patents

Seal structure of oil passage

Info

Publication number
JPH109371A
JPH109371A JP18813396A JP18813396A JPH109371A JP H109371 A JPH109371 A JP H109371A JP 18813396 A JP18813396 A JP 18813396A JP 18813396 A JP18813396 A JP 18813396A JP H109371 A JPH109371 A JP H109371A
Authority
JP
Japan
Prior art keywords
seal
diameter
small
oil passage
ball
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
Application number
JP18813396A
Other languages
Japanese (ja)
Inventor
Masao Shimamoto
雅夫 嶋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP18813396A priority Critical patent/JPH109371A/en
Publication of JPH109371A publication Critical patent/JPH109371A/en
Pending legal-status Critical Current

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  • Control Of Transmission Device (AREA)

Abstract

PROBLEM TO BE SOLVED: To offer a seal structure which can seal certainly the oil passage left open to the outside using seal balls. SOLUTION: This seal structure for an oil passage 4 is formed in a base material 1, and its one end is left open to the outside, wherein seal holes 5 and 6 whose inside diameter increases outward gradually or in steps are furnished at the opening of the oil passage 4, and a large and a small seal ball 10 and 9 are fitted by pressure in the major diametric portion 6 and minor diametric portion 5 of each seal hole so that a double sealing is established. A passage 8 leading to a drain part 7 is furnished between the minor diametric portion 5 and major diametric portion 6 of the seal hole, and it is possible to bleed the oil pressure in the oil passage 4 to the drain part 7 via this passage 8 even in case the small ball 9 will have slipped off.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は自動変速機などの油
路のシール構造に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for an oil passage of an automatic transmission or the like.

【0002】[0002]

【従来の技術】従来、例えば自動変速機の変速機ケース
の側壁には、潤滑油路が形成されており、この油路は変
速機構の軸心穴などに導かれている。一般に、変速機ケ
ースの潤滑油路は、ドリル等によって側壁に穿設されて
いるが、これら油路の開口部から油が漏れないよう、開
口部をシールする必要がある。油路のシールには、開口
部に螺着されるシールプラグと呼ばれるボルトや、開口
部に圧入されるシールボールが一般に用いられている。
2. Description of the Related Art Conventionally, for example, a lubricating oil passage is formed on a side wall of a transmission case of an automatic transmission, and this oil passage is guided to a shaft hole of a transmission mechanism. Generally, a lubricating oil passage of a transmission case is bored in a side wall by a drill or the like. However, it is necessary to seal the opening so that oil does not leak from the opening of the oil passage. A bolt called a seal plug screwed into the opening or a seal ball pressed into the opening is generally used for sealing the oil passage.

【0003】[0003]

【発明が解決しようとする課題】シールプラグはシール
信頼性は比較的高いが、コスト高になるとともに、ボル
トの頭部のために半径方向のスペースが必要であり、取
付部が大きくなる欠点がある。一方、シールボールは安
価であり、大きなスペースを取らないが、圧入力により
油路をシールするため、シールプラグに比べてシール信
頼性が低く、脱落の可能性がある。そのため、外部に開
口した油路のシールにはシールボールは適していなかっ
た。
Although the seal plug has a relatively high seal reliability, it has a disadvantage in that it is costly, and requires a radial space for the head of the bolt, and the mounting portion becomes large. is there. On the other hand, the seal ball is inexpensive and does not take up a large space, but since the oil passage is sealed by press-fitting, the seal reliability is lower than that of the seal plug, and there is a possibility of falling off. For this reason, seal balls are not suitable for sealing oil passages that open to the outside.

【0004】そこで、本発明の目的は、シールボールを
用いて外部に開口した油路を確実にシールできる油路の
シール構造を提供することにある。
An object of the present invention is to provide a seal structure of an oil passage which can reliably seal an oil passage opened to the outside by using a seal ball.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、母材の内部に形成され、一端が外部に開
口した油路のシール構造において、上記油路の開口部
に、外部に向かって漸次もしくは段階的に内径が大きく
なるシール穴を設け、シール穴の大径部と小径部とにそ
れぞれ大小のシールボールを圧入してシール穴を二重に
シールするとともに、上記シール穴の小径部と大径部の
間にドレーン部へ通じる通路を設けたものである。
In order to achieve the above object, the present invention relates to an oil passage seal structure formed inside a base material and having one end opened to the outside. A seal hole having an inner diameter gradually or stepwise increasing toward the seal hole is provided. Large and small seal balls are press-fitted into the large diameter portion and the small diameter portion of the seal hole to seal the seal hole doubly. A passage leading to the drain portion is provided between the small diameter portion and the large diameter portion.

【0006】油路の油圧は開口部の内側に圧入された小
径ボールに作用するため、小径ボールがシール穴の小径
部から脱落する可能性がある。しかし、たとえ小径ボー
ルが脱落しても、油圧はシール穴の小径部と大径部の間
に形成された通路を介してドレーン部へ抜けるので、油
が外部に漏れ出るおそれがない。しかも、脱落した小径
ボールは大径ボールで抜け止めされるので、小径ボール
が外部へ脱落するのを防止できるとともに、油路の油圧
はドレーン部に抜けるので、大径ボールに油圧が作用し
ない。そのため、大径ボールの脱落が未然に防止され
る。
Since the oil pressure in the oil passage acts on the small-diameter ball pressed into the inside of the opening, the small-diameter ball may fall off from the small-diameter portion of the seal hole. However, even if the small-diameter ball falls, the hydraulic pressure flows to the drain portion through the passage formed between the small-diameter portion and the large-diameter portion of the seal hole, so that there is no possibility that the oil leaks to the outside. In addition, since the dropped small-diameter ball is prevented from falling off by the large-diameter ball, the small-diameter ball can be prevented from falling to the outside, and the oil pressure in the oil passage escapes to the drain portion, so that the hydraulic pressure does not act on the large-diameter ball. Therefore, the large-diameter ball is prevented from falling off.

【0007】なお、シール穴は外部に向かって段階的に
内径が大きくなる穴に限らず、テーパ穴のように内径が
漸次大きくなる穴であってもよい。ドレーン部に通じる
通路は、小径ボールがこの通路を通ってドレーン部に脱
落しないように、小径ボールより幅狭もしくは小径な穴
とするのが望ましい。本発明において、母材とは、変速
機ケースに限るものではなく、エンジン本体、補機ケー
ス、バルブボデーなど如何なる部材であってもよい。ま
た、油路は潤滑油路に限るものではなく、スロットル圧
やガバナ圧などの作動圧油路であってもよい。
The seal hole is not limited to a hole whose inside diameter gradually increases toward the outside, but may be a hole whose inside diameter gradually increases like a tapered hole. The passage leading to the drain portion is desirably a hole that is narrower or smaller in diameter than the small-diameter ball so that the small-diameter ball does not fall into the drain portion through this passage. In the present invention, the base material is not limited to the transmission case, but may be any member such as an engine body, an accessory case, and a valve body. The oil passage is not limited to the lubricating oil passage, but may be an operating pressure oil passage such as a throttle pressure and a governor pressure.

【0008】[0008]

【発明の実施の形態】図1,図2は本発明にかかるシー
ル構造を自動変速機の変速機ケースに適用した一例を示
す。図において、1は変速機ケース、2は出力軸、3は
減速ギヤである。変速機ケース1の側壁には潤滑油路4
が形成されており、その一端は外部に開口している。油
路4の開口部は、図2のように内側に小径部5が、外側
に大径部6がそれぞれ形成され、小径部5と大径部6の
間に変速機ケース1の内部空間(ドレーン部)7へ通じ
る通路8が形成されている。
1 and 2 show an example in which a seal structure according to the present invention is applied to a transmission case of an automatic transmission. In the figure, 1 is a transmission case, 2 is an output shaft, and 3 is a reduction gear. A lubricating oil passage 4 is provided on the side wall of the transmission case 1.
Is formed, and one end thereof is open to the outside. The opening of the oil passage 4 has a small-diameter portion 5 formed inside and a large-diameter portion 6 formed outside, as shown in FIG. 2, and the internal space of the transmission case 1 between the small-diameter portion 5 and the large-diameter portion 6 ( A passage 8 leading to a drain portion 7 is formed.

【0009】上記油路4の開口部は、大小2個の鋼製の
シールボール9,10で二重にシールされている。すな
わち、小径のシールボール9は小径部5に圧入され、大
径のシールボール10は大径部6に圧入されている。な
お、小径のシールボール9の直径dは上記通路8の開口
幅xより大きく設定されている。
The opening of the oil passage 4 is double-sealed by two large and small steel seal balls 9 and 10. That is, the small-diameter seal ball 9 is press-fitted into the small-diameter portion 5, and the large-diameter seal ball 10 is press-fitted into the large-diameter portion 6. The diameter d of the small-diameter seal ball 9 is set to be larger than the opening width x of the passage 8.

【0010】上記潤滑油路4の開口部より上流側には、
出力軸2の軸心穴11へ潤滑油を供給する供給口12が
形成されている。軸心穴11へ供給された潤滑油は、減
速ギヤ3の内径部を潤滑している。
On the upstream side of the opening of the lubricating oil passage 4,
A supply port 12 for supplying lubricating oil to a shaft hole 11 of the output shaft 2 is formed. The lubricating oil supplied to the shaft hole 11 lubricates the inner diameter of the reduction gear 3.

【0011】ここで、上記構成よりなるシール構造の作
用効果を説明する。潤滑油路4には矢印方向より潤滑油
が供給されるので、潤滑圧は小径部5に圧入された小径
のシールボール9に作用する。一般にシールボール9の
圧入力は潤滑圧より遙に高いので、シールボール9が脱
落する恐れは少ないが、何らかの原因によりシールボー
ル9が小径部5から脱落する可能性がある。その場合に
は、図3のように小径のシールボール9は油圧によって
大径部6側へ移動し、大径のシールボール10によって
抜け止めされる。そして、潤滑圧は通路8を通って変速
機ケース1の内部空間7へ抜けるので、潤滑圧が大径の
シールボール10には作用せず、大径のシールボール1
0が油圧によって外部へ脱落する恐れはない。そのた
め、油が外部に漏れるといった不具合はない。
Here, the operation and effect of the seal structure having the above configuration will be described. Since the lubricating oil is supplied to the lubricating oil passage 4 in the direction of the arrow, the lubricating pressure acts on the small-diameter seal ball 9 pressed into the small-diameter portion 5. Generally, the pressure input of the seal ball 9 is much higher than the lubricating pressure, so that the seal ball 9 is unlikely to fall off. However, there is a possibility that the seal ball 9 may fall off the small diameter portion 5 for some reason. In this case, as shown in FIG. 3, the small-diameter seal ball 9 moves toward the large-diameter portion 6 by hydraulic pressure and is prevented from falling off by the large-diameter seal ball 10. Since the lubricating pressure passes through the passage 8 to the internal space 7 of the transmission case 1, the lubricating pressure does not act on the large-diameter seal balls 10, but the large-diameter seal balls 1.
There is no danger that 0 will fall out by hydraulic pressure. Therefore, there is no problem that oil leaks outside.

【0012】また、小径のシールボール9の直径dは通
路8の開口幅xより大きいので、万一シールボール9が
小径部5から外れても、変速機ケース1の内部空間7内
に入り込むのを阻止でき、シールボール9がギヤ等の動
力伝達部へ噛み込むといった不具合も発生しない。
Further, since the diameter d of the small-diameter seal ball 9 is larger than the opening width x of the passage 8, even if the seal ball 9 comes off the small-diameter portion 5, the seal ball 9 enters the internal space 7 of the transmission case 1. And the problem that the seal ball 9 bites into a power transmission portion such as a gear does not occur.

【0013】上記実施例では、小径ボールが小径部から
脱落した場合に、通路の幅を小径ボールより狭くして小
径ボールがドレーン部へ脱落するのを防止したが、ドレ
ーン部に動力伝達機構などの可動部が配置されていない
場合や、何らかの噛み込み防止手段が施されている場合
には、小径ボールがドレーン部に落ち込んでも支障はな
い。なお、通路8としては、溝に限らず、穴であっても
よい。さらに、小径ボールのドレーン部への脱落を防止
する手段として、小径ボールより大きな幅あるいは内径
を有する通路にワッシャなどの別部品を配置することに
より、小径ボールを位置規制してもよい。
In the above embodiment, when the small-diameter ball falls from the small-diameter portion, the width of the passage is made narrower than that of the small-diameter ball to prevent the small-diameter ball from dropping to the drain portion. In the case where the movable portion is not arranged, or when some kind of biting prevention means is provided, there is no problem even if the small-diameter ball falls into the drain portion. The passage 8 is not limited to a groove, but may be a hole. Further, as a means for preventing the small-diameter ball from dropping into the drain portion, the position of the small-diameter ball may be regulated by disposing another component such as a washer in a passage having a larger width or inner diameter than the small-diameter ball.

【0014】[0014]

【発明の効果】以上の説明で明らかなように、本発明に
よれば、油路の開口部に外部に向かって漸次もしくは段
階的に内径が大きくなるシール穴を設け、シール穴の大
径部と小径部とにそれぞれ大小のシールボールを圧入し
てシール穴を二重にシールするとともに、シール穴の小
径部と大径部の間にドレーン部に通じる通路を設けたの
で、万一内側の小径ボールが小径部から脱落しても、外
側の大径ボールがシールしているので、油が外部に漏れ
出るおそれがない。また、小径ボールが脱落すると、油
路の油圧はドレーン部に抜けるので、大径ボールに油圧
が作用せず、そのため大径ボールの脱落が未然に防止さ
れる。
As is apparent from the above description, according to the present invention, a seal hole whose inner diameter gradually or stepwise increases toward the outside is provided in the opening of the oil passage, and the large diameter portion of the seal hole is provided. A large and small seal ball is press-fitted into the small diameter part and the seal hole is double-sealed, and a passage leading to the drain part is provided between the small diameter part and the large diameter part of the seal hole. Even if the small-diameter ball falls off from the small-diameter portion, the outside large-diameter ball seals, so that there is no possibility that oil leaks out. Further, when the small-diameter ball falls, the oil pressure in the oil passage escapes to the drain portion, so that the hydraulic pressure does not act on the large-diameter ball, thereby preventing the large-diameter ball from falling off.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明にかかるシール構造を適用した自動変速
機の一例の断面図である。
FIG. 1 is a sectional view of an example of an automatic transmission to which a seal structure according to the present invention is applied.

【図2】図1の要部の拡大図である。FIG. 2 is an enlarged view of a main part of FIG.

【図3】小径ボールが脱落した状態の拡大図である。FIG. 3 is an enlarged view of a state in which a small-diameter ball has dropped.

【符号の説明】[Explanation of symbols]

1 変速機ケース(母材) 4 油路 5 小径部 6 大径部 7 ドレーン部 8 通路 9 小径シールボール 10 大径シールボール DESCRIPTION OF SYMBOLS 1 Transmission case (base material) 4 Oil passage 5 Small diameter part 6 Large diameter part 7 Drain part 8 Passage 9 Small diameter seal ball 10 Large diameter seal ball

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】母材の内部に形成され、一端が外部に開口
した油路のシール構造において、 上記油路の開口部に、外部に向かって漸次もしくは段階
的に内径が大きくなるシール穴を設け、シール穴の大径
部と小径部とにそれぞれ大小のシールボールを圧入して
シール穴を二重にシールするとともに、 上記シール穴の小径部と大径部の間にドレーン部へ通じ
る通路を設けたことを特徴とする油路のシール構造。
An oil passage sealing structure formed inside a base material and having one end open to the outside, wherein a seal hole having an inner diameter gradually or stepwise increasing toward the outside is formed in an opening of the oil passage. The seal hole is double-sealed by press-fitting large and small seal balls into the large diameter portion and the small diameter portion of the seal hole, and a passage leading to the drain portion between the small diameter portion and the large diameter portion of the seal hole. The seal structure of the oil passage characterized by having provided.
JP18813396A 1996-06-27 1996-06-27 Seal structure of oil passage Pending JPH109371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18813396A JPH109371A (en) 1996-06-27 1996-06-27 Seal structure of oil passage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18813396A JPH109371A (en) 1996-06-27 1996-06-27 Seal structure of oil passage

Publications (1)

Publication Number Publication Date
JPH109371A true JPH109371A (en) 1998-01-13

Family

ID=16218319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18813396A Pending JPH109371A (en) 1996-06-27 1996-06-27 Seal structure of oil passage

Country Status (1)

Country Link
JP (1) JPH109371A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831407A (en) * 1986-12-15 1989-05-16 Xerox Corporation Process unit for an imaging apparatus
JP2012087647A (en) * 2010-10-18 2012-05-10 Honda Motor Co Ltd Oil passage structure of internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831407A (en) * 1986-12-15 1989-05-16 Xerox Corporation Process unit for an imaging apparatus
JP2012087647A (en) * 2010-10-18 2012-05-10 Honda Motor Co Ltd Oil passage structure of internal combustion engine

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