JP2008106792A - Breather plug - Google Patents

Breather plug Download PDF

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JP2008106792A
JP2008106792A JP2006287491A JP2006287491A JP2008106792A JP 2008106792 A JP2008106792 A JP 2008106792A JP 2006287491 A JP2006287491 A JP 2006287491A JP 2006287491 A JP2006287491 A JP 2006287491A JP 2008106792 A JP2008106792 A JP 2008106792A
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valve seat
atmosphere
side valve
housing
valve body
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Akihiro Fukatsu
章博 深津
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent leaking of a liquid in a casing to the exterior in a breather plug carrying out atmospheric air release when an internal pressure of a casing such as a transmission case rises. <P>SOLUTION: An atmosphere side valve seat 22 and a case side valve seat 23 are provided in a liquid passage 21 of a breather body 2, a ball valve body 3 is arranged in the liquid passage 21 in a state of a gap C1 being formed between a passage inner face 21a and it, and a structure is provided allowing movement of the ball valve body 3 between the atmosphere side valve seat 22 and the case side valve seat 23. Thus, the ball valve body 3 is normally seated in the case side valve seat 23 by self-weight to prevent intrusion of foreign matter into the transmission case from the outside, and when an case internal pressure rises, the ball valve body 3 separates away from the case side valve seat 23, and the case interior is opened to the atmosphere through the gap C1. When lubricating oil in the transmission case rises to the fluid passage 21, the ball valve body 3 is seated in the atmosphere side valve seat 22 to prevent leakage to the outside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば変速機ケースなどの筐体に取り付けられ、筐体の内圧上昇時に筐体内部を大気に開放するブリーザプラグに関する。   The present invention relates to a breather plug that is attached to a housing such as a transmission case, for example, and opens the inside of the housing to the atmosphere when the internal pressure of the housing increases.

エンジン（内燃機関）を搭載した車両には、エンジンからクラッチを介して入力された回転速度を、走行条件に応じた回転速度に変換する変速機が搭載されている。変速機のケースには、当該変速機ケース内の圧力を調整するためにブリーザプラグが設けられている（例えば、特許文献１参照）。   A vehicle equipped with an engine (internal combustion engine) is equipped with a transmission that converts a rotational speed input from the engine via a clutch into a rotational speed corresponding to a traveling condition. The case of the transmission is provided with a breather plug in order to adjust the pressure in the transmission case (see, for example, Patent Document 1).

ブリーザプラグの一例を図４に示す。この例のブリーザプラグ２０１は、通気孔２２１が中央部に形成され、上部にパッキン受け（弁座）２２２が形成されたブリーザ本体２０２と、パッキン受け２２２の上方に配置されたパッキン（弁体）２０３と、ブリーザ本体２０２の上部を覆うように配置されたキャップ２０４と、キャップ２０４内に収容され、パッキン２０３をパッキン受け２２２に向けて付勢する圧縮コイルばね２０５とを備え、ブリーザ本体２０２の挿入部２０２ａを変速機ケース（筐体）のボス孔（図示せず）にねじ込むことによって変速機ケースに取り付けられる。   An example of a breather plug is shown in FIG. The breather plug 201 of this example includes a breather body 202 having a vent hole 221 formed at the center and a packing receiver (valve seat) 222 formed on the upper portion, and a packing (valve element) disposed above the packing receiver 222. 203, a cap 204 disposed so as to cover an upper portion of the breather body 202, and a compression coil spring 205 that is accommodated in the cap 204 and biases the packing 203 toward the packing receiver 222. The insertion portion 202a is attached to the transmission case by screwing it into a boss hole (not shown) of the transmission case (housing).

このような構造のブリーザプラグ２０１では、通常時（変速機ケース内の圧力が上昇していないとき）は、図４（Ａ）に示すように、圧縮コイルばね２０５の弾性力によってパッキン２０３がパッキン受け２２２に着座しており、外部から変速機ケース内部への異物の混入を防止している。一方、変速機ケース内の圧力が上昇し、パッキン２０３に作用する力が圧縮コイルばね２０５の弾性力よりも大きくなったときには、図４（Ｂ）に示すように、パッキン２０３がパッキン受け２２２から離間して、変速機ケース内部が大気に開放される構造となっている。
特開平８−２８５０５３号公報 In the breather plug 201 having such a structure, during normal operation (when the pressure in the transmission case is not increased), the packing 203 is sealed by the elastic force of the compression coil spring 205 as shown in FIG. It sits on the receiver 222 and prevents foreign matter from entering the transmission case from the outside. On the other hand, when the pressure in the transmission case increases and the force acting on the packing 203 becomes larger than the elastic force of the compression coil spring 205, the packing 203 is removed from the packing receiver 222 as shown in FIG. The structure is separated and the inside of the transmission case is opened to the atmosphere.
JP-A-8-285053

ところで、図４に示すブリーザプラグ２０１は、流体の流れを一方通行でしか制御できない構造（一方向の逆止弁構造）であるため、大気開放時（図４（Ｂ））等において、筐体内部の液体がブリーザ本体２０２の通気孔２２１に浸入したときに、液体が外部に洩れ出すことがある。   By the way, the breather plug 201 shown in FIG. 4 has a structure (one-way check valve structure) in which the flow of fluid can be controlled only in one way, and therefore, when the atmosphere is open (FIG. 4 (B)), etc. When the liquid inside enters the vent hole 221 of the breather body 202, the liquid may leak to the outside.

本発明はそのような実情を考慮してなされたもので、変速機ケースなどの筐体に取り付けられ、外部から筐体内部への異物混入防止と、筐体の内圧上昇時の大気開放とを行うブリーザプラグにおいて、筐体内部の液体が外部に洩れることを防止する構造の実現を目的とする。   The present invention has been made in consideration of such a situation, and is attached to a housing such as a transmission case, etc., and prevents foreign matter from entering the housing from the outside and releases the atmosphere when the internal pressure of the housing increases. In a breather plug to be performed, an object is to realize a structure that prevents liquid inside the casing from leaking to the outside.

本発明は、変速機ケースなどの筐体に取り付けられ、前記筐体の内圧が上昇したときに当該筐体内部を大気に開放するブリーザプラグであって、前記筐体に取り付けた状態で、一端が大気に開放され、他端が前記筐体の内部に連通する流体通路が形成されたブリーザ本体と、前記流体通路の内部に、当該通路内面との間に隙間を形成した状態で配設された弁体と、前記流体通路の大気側に設けられ、前記弁体が着座可能な大気側弁座と、前記流体通路の筐体側に設けられ、前記弁体が着座可能な筐体側弁座とを備え、前記弁体が前記大気側弁座と筐体側弁座との間を移動可能であるとともに、前記弁体の比重が前記筐体内に収容される液体の比重よりも小さいことを特徴としている。   The present invention is a breather plug that is attached to a housing such as a transmission case and opens the inside of the housing to the atmosphere when the internal pressure of the housing increases, Is disposed in a state where a gap is formed between the breather main body in which a fluid passage that is open to the atmosphere and the other end communicates with the inside of the housing, and the inner surface of the passage. A valve body, an atmosphere-side valve seat provided on the atmosphere side of the fluid passage, on which the valve body can be seated, and a housing-side valve seat provided on the housing side of the fluid passage, on which the valve body can be seated. The valve body is movable between the atmosphere side valve seat and the housing side valve seat, and the specific gravity of the valve body is smaller than the specific gravity of the liquid stored in the housing. Yes.

本発明のブリーザプラグによれば、流体通路の一端（大気側端部）を上側として筐体に取り付けた状態で、流体通路の内部に配設した弁体が、大気側弁座と筐体側弁座との間において上下方向に自由に動くことができるので、通常時（筐体内圧が上昇していないとき）においては、弁体が自重で筐体側弁座に着座し、外部から体内部への異物混入を防止することができる。また、筐体の内圧が上昇したときには、弁体が筐体側弁座から離間（開弁）して流体通路内に弁体が浮き上がり、弁体と流体通路の通路内面との間の隙間を通じて筐体内部が大気に開放される。   According to the breather plug of the present invention, the valve body disposed inside the fluid passage with the one end (atmosphere side end portion) of the fluid passage as the upper side is attached to the housing, the atmosphere side valve seat and the housing side valve. Because it can move freely in the vertical direction between the seat and the seat, during normal times (when the internal pressure of the housing is not rising), the valve body is seated on the housing-side valve seat under its own weight, and enters the body from the outside. It is possible to prevent foreign matter from entering. In addition, when the internal pressure of the housing rises, the valve body is separated (opened) from the housing-side valve seat, the valve body rises in the fluid passage, and the housing is passed through the gap between the valve body and the inner surface of the fluid passage. The inside of the body is released to the atmosphere.

一方、筐体内部の液体がブリーザ本体の流体通路に浸入し、その浸入した液体の液面が流体通路内で上昇したときには、弁体が液面に浮かんだ状態で上昇して大気側弁座に着座する。これによって流体通路の大気側が閉塞されるので、液体が外部に洩れ出すことを防止できる。   On the other hand, when the liquid inside the housing enters the fluid passage of the breather body and the liquid level of the liquid that has entered rises in the fluid passage, the valve body rises in a state where it floats on the liquid surface, and the atmosphere side valve seat Sit on. As a result, the atmosphere side of the fluid passage is blocked, so that the liquid can be prevented from leaking outside.

以上のように、ブリーザプラグに２方向の逆止弁機能をもたせることにより、異物（通過不可物質）の筐体内部への混入防止と、外部への液洩れ防止の双方を達成することができる。   As described above, by providing the breather plug with a two-way check valve function, it is possible to achieve both prevention of foreign matter (non-passable substance) from entering the housing and prevention of liquid leakage to the outside. .

本発明において、弁体が球体であり、大気側弁座が大気側に向かうに従って径が縮小するテーパ形状（円すいテーパ）に形成され、筐体側弁座が筐体内部側に向かうに従って径が縮小するテーパ形状（円すいテーパ）に形成されていることが好ましい。   In the present invention, the valve body is a sphere, and is formed in a tapered shape (cone taper) in which the diameter of the atmosphere side valve seat decreases toward the atmosphere side, and the diameter decreases as the case side valve seat moves toward the inside of the casing. It is preferable to be formed in a tapered shape (cone taper).

このように、球体の弁体（ボール弁体）を用いることにより、弁体が大気側弁座と筐体側弁座との間を移動する際に、弁体が流体通路の内面に引っ掛からずにスムーズに動くことができるので、動作不良が起きることがなく、筐体内部への異物の混入と外部への液洩れとを確実に防止することできる。また、弁体を球体とし、大気側弁座及び筐体側弁座をテーパ形状とすることにより、弁体の弁座への着座性を高めることができる。   Thus, by using a spherical valve element (ball valve element), when the valve element moves between the atmosphere side valve seat and the housing side valve seat, the valve element does not get caught on the inner surface of the fluid passage. Since it can move smoothly, malfunction does not occur and contamination of foreign matter inside the casing and leakage of liquid to the outside can be surely prevented. Moreover, the seating property to the valve seat of a valve body can be improved by making a valve body into a spherical body and making an atmosphere side valve seat and a housing | casing side valve seat into a taper shape.

本発明のブリーザプラグによれば、ブリーザ本体に形成した流体通路の内部に弁体を配設し、その弁体が大気側弁座と筐体側弁座との間を移動できる構造として、２方向の逆止弁機能をもたせているので、異物の筐体内部への混入防止と、外部への液洩れ防止の双方を達成することができる。   According to the breather plug of the present invention, the valve body is disposed inside the fluid passage formed in the breather body, and the valve body can move between the atmosphere side valve seat and the housing side valve seat in two directions. Therefore, it is possible to achieve both prevention of foreign matter from entering the inside of the housing and prevention of liquid leakage to the outside.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は本発明のブリーザプラグの一例を示す縦断面図である。図２は図１のＸ−Ｘ断面図である。   FIG. 1 is a longitudinal sectional view showing an example of a breather plug of the present invention. 2 is a cross-sectional view taken along the line XX of FIG.

この例のブリーザプラグ１は、変速機ケース１００に取り付けられ、外部から変速機ケース１００内部への異物混入防止と、変速機ケース１００の内圧上昇時の大気開放とを行う弁装置であって、ブリーザ本体２、ボール弁体３、及び、キャップ４を備えている。   The breather plug 1 of this example is a valve device that is attached to the transmission case 100 and that prevents foreign matter from entering the transmission case 100 from the outside and releases the atmosphere when the internal pressure of the transmission case 100 increases. A breather body 2, a ball valve body 3, and a cap 4 are provided.

キャップ４は、下部のみが開口された略円筒形状の部材で、ブリーザ本体２の上部を覆うように配設されている。キャップ４とブリーザ本体２の外周部との間には隙間が設けられている。なお、キャップ４は、その一部をブリーザ本体２の上部に係止することによってブリーザ本体２に取り付けられている。   The cap 4 is a substantially cylindrical member that is open only at the bottom, and is disposed so as to cover the top of the breather body 2. A gap is provided between the cap 4 and the outer peripheral portion of the breather body 2. The cap 4 is attached to the breather body 2 by locking a part of the cap 4 to the upper part of the breather body 2.

ブリーザ本体２は略円筒形状の部材であって、側部にフランジ（例えば六角フランジ）２ａが一体形成されている。また、フランジ２ａ下部の挿入部２ｂの外周面に雄ねじ２ｃが形成されており、この挿入部２ｂを変速機ケース１００のボス孔（雌ねじ孔）１０１にねじ込むことによって、ブリーザプラグ１を変速機ケース１００に取り付けることができる。   The breather body 2 is a substantially cylindrical member, and a flange (for example, a hexagonal flange) 2a is integrally formed on a side portion. Further, a male screw 2c is formed on the outer peripheral surface of the insertion portion 2b below the flange 2a, and the breather plug 1 is connected to the transmission case by screwing the insertion portion 2b into a boss hole (female screw hole) 101 of the transmission case 100. 100 can be attached.

ブリーザ本体２には、ブリーザプラグ１を変速機ケース１００に取り付けた状態で、一端が大気に開放され、他端が変速機ケース１００の内部に連通する流体通路２１が形成されている。この流体通路２１は断面円形の通路で、ブリーザ本体２の中心軸に沿って延びている。   The breather body 2 is formed with a fluid passage 21 having one end opened to the atmosphere and the other end communicating with the interior of the transmission case 100 with the breather plug 1 attached to the transmission case 100. The fluid passage 21 is a passage having a circular cross section and extends along the central axis of the breather body 2.

流体通路２１の大気側に大気側弁座２２が設けられている。また、流体通路２１のケース側（筐体側）にケース側弁座２３が設けられている。大気側弁座２２は大気側に向かうに従って直径が漸次縮小する円すいテーパ面となっている。また、ケース側弁座２３は変速機ケース１００の内部側に向かうに従って直径が漸次縮小する円すいテーパ面となっており、これら大気側弁座２２とケース側弁座２３とは所定の間隔を隔てて互いに対向している。   An atmosphere side valve seat 22 is provided on the atmosphere side of the fluid passage 21. A case-side valve seat 23 is provided on the case side (housing side) of the fluid passage 21. The atmosphere-side valve seat 22 has a conical tapered surface whose diameter gradually decreases toward the atmosphere. Further, the case side valve seat 23 has a conical tapered surface whose diameter gradually decreases toward the inside of the transmission case 100, and the atmosphere side valve seat 22 and the case side valve seat 23 are spaced apart from each other by a predetermined distance. Facing each other.

流体通路２１の内部にボール弁体３が配設されている。ボール弁体３は大気側弁座２２とケース側弁座２３との間を移動することが可能であり、そのボール弁体３の移動によって、大気側弁座２２へのボール弁体３の着座と大気側弁座２２からの離間とが可能であるとともに、ケース側弁座２３へのボール弁体３の着座とケース側弁座２３からの離間とが可能である。   A ball valve element 3 is disposed inside the fluid passage 21. The ball valve body 3 can move between the atmosphere side valve seat 22 and the case side valve seat 23, and the ball valve body 3 is seated on the atmosphere side valve seat 22 by the movement of the ball valve body 3. The ball valve body 3 can be seated on the case-side valve seat 23 and can be separated from the case-side valve seat 23.

ボール弁体３の比重は、変速機ケース１００に収容される潤滑油の比重よりも小さく、潤滑油が流体通路２１の内部に浸入したときには、その油面にボール弁体３が浮かぶことができる。   The specific gravity of the ball valve body 3 is smaller than the specific gravity of the lubricating oil accommodated in the transmission case 100. When the lubricating oil enters the fluid passage 21, the ball valve body 3 can float on the oil surface. .

ボール弁体３の直径ｄは円形の流体通路２１の内径Ｄよりも小さい。従ってボール弁体３が流体通路２１の途中に位置しているときに、ボール弁体３と流体通路２１の通路内面２１ａとの間に隙間Ｃ１が形成される。また、ボール弁体３の直径ｄは、大気側弁座２２の弁孔（円形孔）２２ａの直径、及び、ケース側弁座２３の弁孔（円形孔）２３ａの直径よりも大きい。   The diameter d of the ball valve body 3 is smaller than the inner diameter D of the circular fluid passage 21. Therefore, when the ball valve body 3 is located in the middle of the fluid passage 21, a gap C <b> 1 is formed between the ball valve body 3 and the passage inner surface 21 a of the fluid passage 21. Further, the diameter d of the ball valve body 3 is larger than the diameter of the valve hole (circular hole) 22 a of the atmosphere side valve seat 22 and the diameter of the valve hole (circular hole) 23 a of the case side valve seat 23.

以上の構造のブリーザプラグ１は、図１に示すように、大気側弁座２２を上側にし、ブリーザ本体２の中心軸が略鉛直方向に沿う姿勢で変速機ケース１００に取り付けられ、この取付状態で、流体通路２１の内部に配設したボール弁体３が、大気側弁座２２とケース側弁座２３との間において上下方向に自由に動くことができる。   As shown in FIG. 1, the breather plug 1 having the above structure is attached to the transmission case 100 with the atmosphere side valve seat 22 on the upper side and the center axis of the breather body 2 being substantially along the vertical direction. Thus, the ball valve element 3 disposed in the fluid passage 21 can freely move in the vertical direction between the atmosphere side valve seat 22 and the case side valve seat 23.

次に、変速機ケース１００に取り付けたブリーザプラグ１の動作を図１及び図３を参照して説明する。   Next, the operation of the breather plug 1 attached to the transmission case 100 will be described with reference to FIGS.

−通常時−
通常時においては、図３（Ａ）に示すように、ボール弁体３が自重によってケース側弁座２３に着座している。このボール弁体３のケース側弁座２３への着座によって弁孔２３ａが塞がれるので、外部から変速機ケース１００の内部に異物（通過不可物質）が混入することを防ぐことができる。 -Normal time-
In a normal state, as shown in FIG. 3A, the ball valve body 3 is seated on the case side valve seat 23 by its own weight. Since the valve hole 23a is closed by the seating of the ball valve body 3 on the case side valve seat 23, it is possible to prevent foreign matters (non-passable substances) from entering the transmission case 100 from the outside.

−大気開放時時−
変速機ケース１００の内圧が上昇したときには、図３（Ｂ）に示すように、ボール弁体３がケース側弁座２３から離間し、流体通路２１内に浮き上がる。このように変速機ケース１００の内圧でボール弁体３が浮いた状態（開弁状態）となると、ボール弁体３の外周面と流体通路２１の通路内面２１ａとの間の隙間Ｃ１を通じて変速機ケース１００の内部が大気に開放され、変速機ケース１００の内圧が低下する。なお、変速機ケース１００の内圧が低くなったときには、ボール弁体３が自重によって落下し、ケース側弁座２３に着座して弁孔２３ａが閉塞される（図３（Ａ））。 −When open to the atmosphere−
When the internal pressure of the transmission case 100 rises, the ball valve element 3 is separated from the case side valve seat 23 and floats in the fluid passage 21 as shown in FIG. Thus, when the ball valve body 3 is in a floating state (opened state) due to the internal pressure of the transmission case 100, the transmission is transmitted through the gap C <b> 1 between the outer peripheral surface of the ball valve body 3 and the passage inner surface 21 a of the fluid passage 21. The inside of case 100 is opened to the atmosphere, and the internal pressure of transmission case 100 decreases. When the internal pressure of the transmission case 100 becomes low, the ball valve body 3 falls due to its own weight, and is seated on the case side valve seat 23 to close the valve hole 23a (FIG. 3A).

−油面上昇時−
まず、変速機ケース１００に収容された潤滑油は、変速機ケース１００内での攪拌（掻き揚げ）や変速機ケース１００の傾斜等により潤滑油がブリーザプラグ１にまで上昇する場合がある。このようにして潤滑油が上昇すると、ボール弁体３が押し上げられ、ケース側弁座２３の弁孔２３ａを通じて潤滑油が流体通路２１内に浸入するが、この例では、流体通路２１内に浸入した潤滑油の液面が上昇しても、図３（Ｃ）に示すように、油面に浮かぶボール弁体３が大気側弁座２２に着座した時点で弁孔２２ａが塞がれるので、潤滑油が外部に洩れ出すことを防止することができる。 -When oil level rises-
First, the lubricant contained in the transmission case 100 may rise up to the breather plug 1 due to stirring (raising) in the transmission case 100, inclination of the transmission case 100, or the like. When the lubricating oil rises in this way, the ball valve body 3 is pushed up and the lubricating oil enters the fluid passage 21 through the valve hole 23a of the case side valve seat 23. In this example, the lubricating oil enters the fluid passage 21. Even if the liquid level of the lubricating oil rises, as shown in FIG. 3C, the valve hole 22a is blocked when the ball valve element 3 floating on the oil level is seated on the atmosphere side valve seat 22, It is possible to prevent the lubricating oil from leaking outside.

以上のように、この例では、ブリーザプラグ１に２方向の逆止弁機能をもたせているので、外部から筐体内部への異物混入防止と、外部への液洩れ防止の双方を達成することができる。   As described above, in this example, the breather plug 1 is provided with a two-way check valve function, so that both prevention of foreign matter from the inside of the housing and prevention of liquid leakage to the outside can be achieved. Can do.

さらに、ブリーザプラグ１に２方向の逆止弁機能をもたせることで、液体の外部への洩れを防止する機能を持たないブリーザプラグと比較して油洩れ防止性能が向上する。これによって、変速機ケース１００内に収容する潤滑油の油量をアップすることが可能になるので、ベアリングやギヤ等の耐久性が向上する。また、油洩れ防止性能が向上することにより搭載条件のレンジが広がる。この点について説明する。   Furthermore, by providing the breather plug 1 with a two-way check valve function, oil leakage prevention performance is improved as compared with a breather plug that does not have a function of preventing leakage of liquid to the outside. As a result, the amount of lubricating oil stored in the transmission case 100 can be increased, and the durability of bearings, gears, and the like is improved. In addition, the range of mounting conditions is expanded by improving the oil leakage prevention performance. This point will be described.

まず、変速機を搭載した車両の車速が速くなると、変速機ケース１００内での潤滑油の攪拌が強くなり、潤滑油がブリーザプラグまで上昇する可能性が高くなる。また、車両の傾きにより変速機ケース１００が傾斜した場合においても潤滑油がブリーザプラグまで上昇する可能性がある。ここで、液体の外部への洩れを防止する機能を持たない通常のブリーザプラグの場合、車速が速くなったり、変速機ケース１００の傾斜角が大きくなって、ブリーザプラグまで潤滑油が上昇すると油洩れが生じる。これに対し、この例のブリーザプラグ１では油洩れ防止性能が高いので、変速機ケース１００内の油量が同じであれば、通常のブリーザプラグにおいて油洩れが生じる車速やケース傾斜角に到達しても、ブリーザプラグ１から外部への油洩れが生じることがない。従って、油洩れを防止することが可能な車速や傾斜角（搭載条件）のレンジを広くすることができる。   First, when the vehicle speed of a vehicle equipped with a transmission increases, the agitation of the lubricating oil in the transmission case 100 becomes stronger, and the possibility that the lubricating oil will rise to the breather plug increases. Further, even when the transmission case 100 is inclined due to the inclination of the vehicle, the lubricating oil may rise to the breather plug. Here, in the case of a normal breather plug that does not have a function of preventing leakage of liquid to the outside, if the vehicle speed increases or the inclination angle of the transmission case 100 increases and the lubricating oil rises to the breather plug, the oil Leakage occurs. On the other hand, since the breather plug 1 of this example has a high oil leakage prevention performance, if the amount of oil in the transmission case 100 is the same, the vehicle speed and case inclination angle at which oil leakage occurs in a normal breather plug will be reached. However, oil leakage from the breather plug 1 to the outside does not occur. Therefore, the range of vehicle speed and inclination angle (mounting conditions) that can prevent oil leakage can be widened.

ここで、この例では、ボール弁体３を用いているので、当該ボール弁体３が大気側弁座２２とケース側弁座２３との間を移動する際に、ボール弁体３が流体通路２１の通路内面２１ａに引っ掛からずにスムーズに動くことができる。これによって、動作不良が起きることがなくなり、変速機ケース１００内部への異物混入と外部への油洩れとを確実に防止することできる。また、大気側弁座２２及びケース側弁座２３を円すいテーパ面としているので、ボール弁体３の大気側弁座２２及びケース側弁座２３への着座性を高めることができる。   Here, in this example, since the ball valve body 3 is used, when the ball valve body 3 moves between the atmosphere side valve seat 22 and the case side valve seat 23, the ball valve body 3 21 can move smoothly without being caught by the passage inner surface 21a. As a result, malfunction does not occur, and foreign matter contamination inside the transmission case 100 and oil leakage to the outside can be reliably prevented. In addition, since the atmosphere side valve seat 22 and the case side valve seat 23 are conical tapered surfaces, the seating property of the ball valve body 3 on the atmosphere side valve seat 22 and the case side valve seat 23 can be improved.

−他の実施形態−
以上の例では、流体通路内に収容する弁体をボール弁体としているが、大気側弁座及び筐体側弁座の各弁孔を閉塞することができるとともに、これら大気側弁座と筐体側弁座との間をスムーズに移動することが可能であれば、弁体の形状は特に限定されない。また、大気側弁座及び筐体側弁座の形状についても、円すいテーパ以外の形状であってもよい。 -Other embodiments-
In the above example, the valve body accommodated in the fluid passage is a ball valve body, but each valve hole of the atmosphere side valve seat and the housing side valve seat can be closed, and the atmosphere side valve seat and the housing side The shape of the valve body is not particularly limited as long as it can move smoothly between the valve seats. Further, the atmosphere side valve seat and the housing side valve seat may have shapes other than the conical taper.

以上の例では、本発明のブリーザプラグを変速機ケースに取り付けた例を示したが、これに限られることなく、本発明のブリーザプラグは、例えばデファレンシャル機構を収容する筐体などの他の各種筐体に適用することができる。   In the above example, the breather plug according to the present invention is attached to the transmission case. However, the breather plug according to the present invention is not limited to this example, and the breather plug according to the present invention can be used in various other cases such as a housing that houses a differential mechanism. It can be applied to a housing.

本発明のブリーザプラグの一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the breather plug of this invention. 図１のＸ−Ｘ断面図である。It is XX sectional drawing of FIG. 図１のブリーザプラグの動作説明図である。It is operation | movement explanatory drawing of the breather plug of FIG. 従来のブリーザプラグの一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the conventional breather plug.

符号の説明Explanation of symbols

１ ブリーザプラグ
２ ブリーザ本体
２１ 流体通路
２２ 大気側弁座
２２ａ 弁孔
２３ ケース側弁座（筐体側弁座）
２３ａ 弁孔
３ ボール弁体
４ キャップ
１００ 変速機ケース（筐体）
Ｃ１ 隙間 DESCRIPTION OF SYMBOLS 1 Breather plug 2 Breather main body 21 Fluid passage 22 Atmospheric side valve seat 22a Valve hole 23 Case side valve seat (chassis side valve seat)
23a Valve hole 3 Ball valve body 4 Cap 100 Transmission case (housing)
C1 gap

Claims (2)

筐体に取り付けられ、前記筐体の内圧が上昇したときに当該筐体内部を大気に開放するブリーザプラグであって、
前記筐体に取り付けた状態で、一端が大気に開放され、他端が前記筐体の内部に連通する流体通路が形成されたブリーザ本体と、前記流体通路の内部に、当該通路内面との間に隙間を形成した状態で配設された弁体と、前記流体通路の大気側に設けられ、前記弁体が着座可能な大気側弁座と、前記流体通路の筐体側に設けられ、前記弁体が着座可能な筐体側弁座とを備え、前記弁体が前記大気側弁座と筐体側弁座との間を移動可能であるとともに、前記弁体の比重が前記筐体内に収容される液体の比重よりも小さいことを特徴とするブリーザプラグ。 A breather plug that is attached to the housing and opens the interior of the housing to the atmosphere when the internal pressure of the housing increases.
A breather body in which one end is opened to the atmosphere and the other end communicates with the inside of the casing in a state of being attached to the casing, and between the inner surface of the passage and the inside of the fluid path. A valve body disposed in a state where a gap is formed, an atmosphere-side valve seat provided on the atmosphere side of the fluid passage, on which the valve body can be seated, and a housing side of the fluid passage, A body-side valve seat on which a body can be seated, the valve body is movable between the atmosphere-side valve seat and the housing-side valve seat, and the specific gravity of the valve body is accommodated in the housing A breather plug characterized by being smaller than the specific gravity of the liquid. 請求項１記載のブリーザプラグにおいて、
前記弁体が球体であり、前記大気側弁座が大気側に向かうに従って径が縮小するテーパ形状に形成され、前記筐体側弁座が筐体内部側に向かうに従って径が縮小するテーパ形状に形成されていることを特徴とするブリーザプラグ。 The breather plug according to claim 1.
The valve body is a sphere, and the atmosphere side valve seat is formed in a tapered shape whose diameter decreases as it goes to the atmosphere side, and the housing side valve seat is formed in a taper shape whose diameter decreases as it goes toward the inside of the housing. Breather plug characterized by being.
JP2006287491A 2006-10-23 2006-10-23 Breather plug Pending JP2008106792A (en)

Priority Applications (1)

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Cited By (14)

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WO2011058571A1 (en) * 2009-11-12 2011-05-19 Arun Kumar Sinha Air breather assembly with single vent and with single / twin ball valves
DE102010025078A1 (en) * 2010-06-25 2011-12-29 Hydraulik-Ring Gmbh Device for ventilating hydraulic passage leading from pressure source to actuator of dual clutch transmission of motor car, has vent valve comprising spring for applying force to valve member such that fluid is pushed against valve seat
CN102374279A (en) * 2010-08-05 2012-03-14 东洋电机制造株式会社 Gear device for electric motor
CN102767613A (en) * 2012-07-18 2012-11-07 杭州杰牌传动科技有限公司 Multifunctional air ventilator
CN102777576A (en) * 2011-05-11 2012-11-14 铁道部运输局 Gearbox with floating ventilation device and use method of gearbox
JP2013029163A (en) * 2011-07-28 2013-02-07 Toyota Motor Corp Breather device
JP2013083300A (en) * 2011-10-07 2013-05-09 Toyota Motor Corp Breather plug
CN105156717A (en) * 2015-08-28 2015-12-16 聚瑞环保科技（江苏）有限公司 Breather valve
DE102016217919A1 (en) 2016-09-19 2018-03-22 Volkswagen Aktiengesellschaft Ventilation and / or ventilation device for a housing, in particular for the transmission housing of a motor vehicle
CN109555754A (en) * 2018-12-16 2019-04-02 宏光空降装备有限公司 Steel ball respirator
CN109899497A (en) * 2019-04-24 2019-06-18 重庆青山工业有限责任公司 A kind of exhaust plug structure
CN110219965A (en) * 2019-03-25 2019-09-10 陕西法士特齿轮有限责任公司 A kind of flush type ventilation plug structure and method for exhausting
CN113357347A (en) * 2021-07-22 2021-09-07 中车青岛四方机车车辆股份有限公司 Exhaust device and rail vehicle
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011058571A1 (en) * 2009-11-12 2011-05-19 Arun Kumar Sinha Air breather assembly with single vent and with single / twin ball valves
DE102010025078A1 (en) * 2010-06-25 2011-12-29 Hydraulik-Ring Gmbh Device for ventilating hydraulic passage leading from pressure source to actuator of dual clutch transmission of motor car, has vent valve comprising spring for applying force to valve member such that fluid is pushed against valve seat
DE102010025078B4 (en) 2010-06-25 2022-07-21 Hilite Germany Gmbh Device for venting a hydraulic line leading from a pressure source to a consumer
US9777823B2 (en) 2010-08-05 2017-10-03 Toyo Electric Mfg. Co. Ltd. Gear device for electric motor
CN102374279A (en) * 2010-08-05 2012-03-14 东洋电机制造株式会社 Gear device for electric motor
CN102777576A (en) * 2011-05-11 2012-11-14 铁道部运输局 Gearbox with floating ventilation device and use method of gearbox
JP2013029163A (en) * 2011-07-28 2013-02-07 Toyota Motor Corp Breather device
JP2013083300A (en) * 2011-10-07 2013-05-09 Toyota Motor Corp Breather plug
CN102767613A (en) * 2012-07-18 2012-11-07 杭州杰牌传动科技有限公司 Multifunctional air ventilator
CN105156717A (en) * 2015-08-28 2015-12-16 聚瑞环保科技（江苏）有限公司 Breather valve
DE102016217919A1 (en) 2016-09-19 2018-03-22 Volkswagen Aktiengesellschaft Ventilation and / or ventilation device for a housing, in particular for the transmission housing of a motor vehicle
CN109555754A (en) * 2018-12-16 2019-04-02 宏光空降装备有限公司 Steel ball respirator
CN110219965A (en) * 2019-03-25 2019-09-10 陕西法士特齿轮有限责任公司 A kind of flush type ventilation plug structure and method for exhausting
CN110219965B (en) * 2019-03-25 2024-02-06 陕西法士特齿轮有限责任公司 Buried vent plug structure and exhaust method
CN109899497A (en) * 2019-04-24 2019-06-18 重庆青山工业有限责任公司 A kind of exhaust plug structure
CN113719602A (en) * 2021-07-13 2021-11-30 东风汽车集团股份有限公司 Gearbox air breather and gearbox
CN113719602B (en) * 2021-07-13 2024-01-16 东风汽车集团股份有限公司 Gearbox ventilation device and gearbox
CN113357347A (en) * 2021-07-22 2021-09-07 中车青岛四方机车车辆股份有限公司 Exhaust device and rail vehicle

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