JP4320284B2 - Engine breather equipment - Google Patents

Engine breather equipment Download PDF

Info

Publication number
JP4320284B2
JP4320284B2 JP2004198837A JP2004198837A JP4320284B2 JP 4320284 B2 JP4320284 B2 JP 4320284B2 JP 2004198837 A JP2004198837 A JP 2004198837A JP 2004198837 A JP2004198837 A JP 2004198837A JP 4320284 B2 JP4320284 B2 JP 4320284B2
Authority
JP
Japan
Prior art keywords
breather
valve
engagement hole
reinforcing plate
hole
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.)
Active
Application number
JP2004198837A
Other languages
Japanese (ja)
Other versions
JP2006022650A (en
Inventor
祐彦 川本
鉱三 吉田
俊一 萬羽
真 磯村
佐々木　　洋
崇之 大西
貢 奥田
信幸 小林
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP2004198837A priority Critical patent/JP4320284B2/en
Publication of JP2006022650A publication Critical patent/JP2006022650A/en
Application granted granted Critical
Publication of JP4320284B2 publication Critical patent/JP4320284B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本発明は、エンジンのブリーザ装置に関し、詳しくは、ブリーザ弁のゴム弁体の損傷を防止することができる、エンジンのブリーザ装置に関するものである。   The present invention relates to an engine breather device, and more particularly to an engine breather device capable of preventing damage to a rubber valve body of a breather valve.

エンジンのブリーザ装置は、エンジン運転中、上昇したクランク室の内圧を抜き、オイルシールからのオイルの噴出しを防止するために用いらている。ブリーザ装置には、ブリーザ弁が用いられ、クランク室のブローバイガスがブリーザ通路に流入する際、ブローバイガスに含まれるオイルミストを分離できるようになっている。ブリーザ弁にはゴム弁体と補強板とから構成されているものがある。   BACKGROUND ART An engine breather device is used to release the internal pressure of a crank chamber that has risen during engine operation and prevent oil from being ejected from an oil seal. In the breather device, a breather valve is used, and when blowby gas in the crank chamber flows into the breather passage, oil mist contained in the blowby gas can be separated. Some breather valves include a rubber valve body and a reinforcing plate.

図５(Ａ)(Ｂ)に示すように、従来のブリーザ弁として、本発明と同様、補強板(１１２)をゴム弁体(１１１)に取り付けるに当たり、補強板(１１２)の中央とその周囲に係合孔(１１４)(１１５)をあけ、ゴム弁体(１１１)の上面の中央とその周囲に突起(１１６)を設け、各突起(１１６)を各係合孔(１１４)(１１５)に嵌入し、各係合孔(１１４)(１１５)の周縁部に各突起(１１６)の径大部(１１７)を係止させることにより、各突起(１１６)を各係合孔(１１４)(１１５)に対して抜け止めしたものがある。
この種のブリーザ弁には、補強板(１１２)をゴム弁体(１１１)に取り付けて、簡単に組み立てることができる利点がある。 As shown in FIGS. 5 (A) and 5 (B), as a conventional breather valve, as in the present invention, when attaching the reinforcing plate (112) to the rubber valve body (111), the center of the reinforcing plate (112) and its surroundings are provided. Are provided with protrusions (116) at the center and the periphery of the upper surface of the rubber valve body (111), and the protrusions (116) are connected to the engagement holes (114) (115). The large diameter portion (117) of each protrusion (116) is engaged with the peripheral edge portion of each engagement hole (114) (115), so that each protrusion (116) is engaged with each engagement hole (114). There is something that has been secured against (115).
This type of breather valve has the advantage that it can be easily assembled by attaching the reinforcing plate (112) to the rubber valve element (111).

しかし、上記従来のブリーザ弁では、中央の係合孔(１１４)と同様、周囲の係合孔(１１５)を丸孔で構成しているため、問題が生じている。   However, the conventional breather valve has a problem because the surrounding engaging hole (115) is formed of a round hole as in the case of the central engaging hole (114).

上記従来技術では、次の問題がある。
《問題》 ブリーザ弁のゴム弁体が損傷しやすい。
中央の係合孔(１１４)と同様、周囲の係合孔(１１５)を丸孔で構成しているため、温度変化や、経時的なゴム弁体(１１１)の膨潤により、補強板(１１２)とゴム弁体(１１１)の膨張や収縮にずれが生じても、周囲の突起(１１６)は丸孔の係合孔(１１５)内では移動することができない。このため、周囲の突起(１１６)の付け根が中央の係合孔(１１４)寄りまたは補強板(１１２)の周縁寄りに引っ張られ、ゴム弁体(１１１)が損傷しやすい。 The above prior art has the following problems.
<Problem> The rubber disc of the breather valve is easily damaged.
Like the central engagement hole (114), the surrounding engagement hole (115) is a round hole, so that the reinforcing plate (112) is caused by temperature change or swelling of the rubber valve body (111) over time. ) And the rubber valve body (111) are displaced in expansion and contraction, the surrounding protrusions (116) cannot move in the round engagement holes (115). For this reason, the base of the peripheral protrusion (116) is pulled toward the center engaging hole (114) or the peripheral edge of the reinforcing plate (112), and the rubber valve element (111) is easily damaged.

本発明は、上記問題点を解決することができるエンジンのブリーザ装置、すなわち、ブリーザ弁のゴム弁体の損傷を防止することができる、エンジンのブリーザ装置を提供することを課題とする。   An object of the present invention is to provide an engine breather device that can solve the above-described problems, that is, an engine breather device that can prevent damage to a rubber valve body of a breather valve.

請求項１に係る発明の発明特定事項は、次の通りである。
図２に例示するように、ヘッドカバー(１)にブリーザ通路(２)を設け、ヘッドカバー(１)の天井壁(３)に弁取付用開口部(４)を設け、弁取付用開口部(４)の周縁に弁取付座(５)を設け、弁取付用開口部(４)の中央でブリーザ通路(２)の通路入口(６)を上向きに開口させ、この通路入口(６)の周囲に環状弁座(７)を設け、環状弁座(７)の周囲空間(８)をクランク室と連通させ、図３に例示するように、弁取付用開口部(４)を上からダイヤフラム型のブリーザ弁(９)で覆い、ブリーザ弁(９)を上から椀型のバネケース(１０)で覆い、ブリーザ弁(９)をゴム弁体(１１)と補強板(１２)とで構成し、ゴム弁体(１１)の周縁部を弁取付座(５)に着座させ、補強板(１２)をゴム弁体(１１)の上面に重ねて取り付け、バネケース(１０)に収容したバネ(１３)を補強板(１２)に当接させ、ゴム弁体(１１)の下面にある弁面(１１ａ)をバネ(１３)の付勢力で環状弁座(７)に着座させ、
図１(Ａ)(Ｂ)または図４(Ａ)(Ｂ)に例示するように、補強板(１２)をゴム弁体(１１)に取り付けるに当たり、補強板(１２)の中央とその周囲に係合孔(１４)(１５)をあけ、ゴム弁体(１１)の上面の中央とその周囲に突起(１６)を設け、各突起(１６)を各係合孔(１４)(１５)に嵌入し、各係合孔(１４)(１５)の周縁部に各突起(１６)の径大部(１７)を係止させることにより、各突起(１６)を各係合孔(１４)(１５)に対して抜け止めした、エンジンのブリーザ装置において、
中央の係合孔(１４)を丸孔で構成するとともに、周囲の係合孔(１５)を長孔で構成し、この長孔の係合孔(１５)の一端が中央の係合孔(１４)寄りに位置し、他端が補強板(１２)の周縁寄りに位置するように、長孔の係合孔(１５)を方向付けた、ことを特徴とするエンジンのブリーザ装置。 Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 2, the breather passage (2) is provided in the head cover (1), the valve mounting opening (4) is provided in the ceiling wall (3) of the head cover (1), and the valve mounting opening (4 ) Is provided with a valve mounting seat (5), and a passage inlet (6) of the breather passage (2) is opened upward at the center of the valve mounting opening (4). An annular valve seat (7) is provided, and the surrounding space (8) of the annular valve seat (7) is communicated with the crank chamber. As illustrated in FIG. 3, the valve mounting opening (4) is a diaphragm type from above. The breather valve (9) is covered, the breather valve (9) is covered with a saddle-shaped spring case (10) from above, and the breather valve (9) is composed of a rubber valve element (11) and a reinforcing plate (12). The peripheral part of the valve body (11) is seated on the valve mounting seat (5), the reinforcing plate (12) is attached to the upper surface of the rubber valve body (11), and the spring (13) housed in the spring case (10) is attached. It hits the reinforcing plate (12) It is, to seat the valve surface on the underside of the rubber valve body (11) and (11a) in the spring annular valve seat by the urging force of the (13) (7),
As illustrated in FIG. 1 (A) (B) or FIG. 4 (A) (B), when the reinforcing plate (12) is attached to the rubber valve body (11), the center of the reinforcing plate (12) and the periphery thereof are arranged. Engagement holes (14) and (15) are opened, and protrusions (16) are provided at the center and the periphery of the upper surface of the rubber valve body (11). The protrusions (16) are engaged with the engagement holes (14) (14) (15) by engaging and engaging the large-diameter portions (17) of the protrusions (16) with the peripheral portions of the engagement holes (14), (15). 15) In the engine breather device,
The central engagement hole (14) is a round hole, and the surrounding engagement hole (15) is a long hole. One end of the long engagement hole (15) is the central engagement hole ( 14) A breather device for an engine, characterized in that the long engagement hole (15) is oriented so that the other end is located near the periphery of the reinforcing plate (12).

（請求項１に係る発明）
《効果》 ブリーザ弁のゴム弁体の損傷を防止することができる。
図１(Ａ)または図４(Ａ)に例示するように、中央の係合孔(１４)を丸孔で構成するとともに、周囲の係合孔(１５)を長孔で構成し、この長孔の係合孔(１５)の一端が中央の係合孔(１４)寄りに位置し、他端が補強板(１２)の周縁寄りに位置するように、長孔の係合孔(１５)を方向付けたため、温度変化や、経時的なゴム弁体(１１)の膨潤により、補強板(１２)とゴム弁体(１１)の膨張や収縮にずれが生じても、周囲の突起(１６)は長孔の係合孔(１５)内で移動することができる。このため、周囲の突起(１６)の付け根が中央の係合孔(１４)寄りまたは補強板(１２)の周縁寄りに引っ張られることがなく、ゴム弁体(１１)の損傷を防止することができる。 (Invention according to Claim 1)
<Effect> It is possible to prevent the rubber valve body of the breather valve from being damaged.
As illustrated in FIG. 1 (A) or FIG. 4 (A), the central engagement hole (14) is a round hole, and the surrounding engagement hole (15) is a long hole. The long engagement hole (15) so that one end of the engagement hole (15) of the hole is located closer to the center engagement hole (14) and the other end is located closer to the peripheral edge of the reinforcing plate (12). Therefore, even if the expansion and contraction of the reinforcing plate (12) and the rubber valve body (11) are displaced due to the temperature change and the swelling of the rubber valve body (11) over time, the surrounding protrusions (16 ) Can move within the elongated engagement hole (15). For this reason, the base of the peripheral protrusion (16) is not pulled toward the center engagement hole (14) or the periphery of the reinforcing plate (12), and the rubber valve element (11) can be prevented from being damaged. it can.

（請求項２に係る発明）
請求項１に係る発明の効果に加え、次の効果を奏する。
《効果》 膨張や収縮に対するゴム弁体の損傷防止機能が高い。
図１(Ａ)に例示するように、ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)と平行な向きに方向付けたため、長孔の各係合孔(１５)の向きが、膨張や収縮の方向と一致し、突起(１６)が係合孔(１５)内を無理なく移動する。このため、膨張や収縮に対するゴム弁体(１１)の損傷防止機能が高い。 (Invention according to Claim 2)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> The rubber valve body has a high damage prevention function against expansion and contraction.
As illustrated in FIG. 1A, when the breather valve (9) is viewed from above, the center point (14a) of the central engagement hole (14) and the center point (15a) of the surrounding engagement hole (15) are shown. ) And the surrounding engagement holes (15) are oriented in a direction parallel to the radiation (18) passing through the engagement holes (15). The direction of each engagement hole (15) of the hole coincides with the direction of expansion and contraction, and the protrusion (16) moves through the engagement hole (15) without difficulty. For this reason, the damage prevention function of the rubber valve element (11) against expansion and contraction is high.

（請求項３に係る発明）
請求項１に係る発明の効果に加え、次の効果を奏する。
《効果》 ゴム弁体の偏摩耗を防止することができる。
図４(Ａ)に例示するように、ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)に対して同じ向きに所定角度(Θ)だけ傾けたため、周囲の係合孔(１５)内を突起(１６)が移動するにつれて、ゴム弁体(１１)が中央の突起(１６)を中心として回動する。このため、ゴム弁体(１１)の弁面(１１ａ)の偏摩耗を防止することができる。 (Invention according to claim 3)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> Uneven wear of the rubber valve body can be prevented.
As illustrated in FIG. 4A, when the breather valve (9) is viewed from above, the center point (14a) of the center engagement hole (14) and the center point (15a) of the surrounding engagement hole (15) are shown. ) And passing through each engagement hole (15) of the surrounding long hole with a predetermined angle (Θ) in the same direction with respect to the radiation (18) passing through the engagement hole (15). ), The rubber valve element (11) rotates around the central protrusion (16) as the protrusion (16) moves in the surrounding engagement hole (15). For this reason, uneven wear of the valve face (11a) of the rubber valve element (11) can be prevented.

本発明の実施の形態を図面に基づいて説明する。
図１〜図３はいずれも本発明の第１実施形態に係るエンジンのブリーザ装置を説明する図である。 Embodiments of the present invention will be described with reference to the drawings.
1 to 3 are views for explaining the breather device for an engine according to the first embodiment of the present invention.

この第１実施形態のエンジンのブリーザ装置の概要は、次の通りである。
図２に示すように、ヘッドカバー(１)にブリーザ通路(２)を設けている。ブリーザ通路(２)の出口(１９)は、吸気通路に連通させている。ヘッドカバー(１)の天井壁(３)に弁取付用開口部(４)を設け、弁取付用開口部(４)の周縁に弁取付座(５)を設け、弁取付用開口部(４)の中央でブリーザ通路(２)の通路入口(６)を上向きに開口させ、この通路入口(６)の周囲に環状弁座(７)を設け、環状弁座(７)の周囲空間(８)をクランク室(図外)と連通させている。この周囲空間(８)は、シリンダヘッドやシリンダブロックの連通路を介してクランク室と連通させている。 図３に示すように、弁取付用開口部(４)を上からダイヤフラム型のブリーザ弁(９)で覆い、ブリーザ弁(９)を上から椀型のバネケース(１０)で覆っている。 The outline of the breather device for the engine of the first embodiment is as follows.
As shown in FIG. 2, a breather passage (2) is provided in the head cover (1). The outlet (19) of the breather passage (2) communicates with the intake passage. A valve mounting opening (4) is provided on the ceiling wall (3) of the head cover (1), a valve mounting seat (5) is provided on the periphery of the valve mounting opening (4), and the valve mounting opening (4). The passage inlet (6) of the breather passage (2) is opened upward at the center of the pipe, and an annular valve seat (7) is provided around the passage inlet (6). A space (8) around the annular valve seat (7) Is in communication with the crank chamber (not shown). The surrounding space (8) communicates with the crank chamber through a communication path of the cylinder head and the cylinder block. As shown in FIG. 3, the valve mounting opening (4) is covered from above with a diaphragm type breather valve (9), and the breather valve (9) is covered from above with a saddle type spring case (10).

図１(Ａ)(Ｂ)に示すように、ブリーザ弁(９)をゴム弁体(１１)と補強板(１２)とで構成し、ゴム弁体(１１)の周縁部を弁取付座(５)に着座させ、上からバネケース(１０)で押さえ付けて、ゴム弁体(１１)を固定している。補強板(１２)をゴム弁体(１１)の上面に重ねて取り付け、バネケース(１０)に収容したバネ(１３)を補強板(１２)に当接させ、ゴム弁体(１１)の下面にある弁面(１１ａ)をバネ(１３)の付勢力で環状弁座(７)に着座させている。エンジン運転中、ブローバイガスの発生等によりクランク室の内圧が高まると、ブリーザ弁(９)がバネ(１３)の付勢力に抗して開弁し、ブローパイガス等がブリーザ通路(２)を介して吸気通路に吸入され、クランク室の内圧上昇を抑制する。ブローバイガスに含まれるオイルミストの多くは、ブリーザ弁(９)と環状弁座(７)との間を通過する過程で分離され、ブリーザ通路(２)へのオイルの連れ出しが抑制される。バネケース(１０)内は空気孔(２０)で大気と連通させている。   As shown in FIGS. 1 (A) and 1 (B), the breather valve (9) is composed of a rubber valve body (11) and a reinforcing plate (12), and the peripheral portion of the rubber valve body (11) is a valve mounting seat ( The rubber valve body (11) is fixed by being seated on 5) and pressed from above with a spring case (10). The reinforcing plate (12) is attached to the upper surface of the rubber valve body (11) so as to be overlapped, and the spring (13) accommodated in the spring case (10) is brought into contact with the reinforcing plate (12) to be attached to the lower surface of the rubber valve body (11). A certain valve face (11a) is seated on the annular valve seat (7) by the biasing force of the spring (13). When the internal pressure of the crank chamber increases due to generation of blow-by gas during engine operation, the breather valve (9) opens against the urging force of the spring (13), and blow pie gas etc. passes through the breather passage (2). It is sucked into the intake passage and suppresses an increase in the internal pressure of the crank chamber. Most of the oil mist contained in the blow-by gas is separated in the process of passing between the breather valve (9) and the annular valve seat (7), and oil take-out to the breather passage (2) is suppressed. The spring case (10) communicates with the atmosphere through an air hole (20).

ブリーザ弁体の構造は、次の通りである。
図１(Ａ)(Ｂ)に示すように、補強板(１２)をゴム弁体(１１)に取り付けるに当たり、補強板(１２)の中央とその周囲に係合孔(１４)(１５)をあけ、ゴム弁体(１１)の上面の中央とその周囲に突起(１６)を設け、各突起(１６)を各係合孔(１４)(１５)に嵌入し、各係合孔(１４)(１５)の周縁部に各突起(１６)の径大部(１７)を係止させることにより、各突起(１６)を各係合孔(１４)(１５)に対して抜け止めしている。補強板(１２)は金属板である。補強板(１２)に合成樹脂を用いることもできる。 The structure of the breather valve body is as follows.
As shown in FIGS. 1 (A) and 1 (B), when attaching the reinforcing plate (12) to the rubber valve body (11), engaging holes (14), (15) are formed in the center of the reinforcing plate (12) and the periphery thereof. A protrusion (16) is provided at the center of the upper surface of the rubber valve body (11) and its periphery, and the protrusions (16) are fitted into the engagement holes (14) and (15). By locking the large-diameter portion (17) of each projection (16) to the peripheral portion of (15), each projection (16) is prevented from coming off from each engagement hole (14) (15). . The reinforcing plate (12) is a metal plate. A synthetic resin can also be used for the reinforcing plate (12).

係合孔の構成は、次の通りである。
図１(Ａ)(Ｂ)に示すように、中央の係合孔(１４)を丸孔で構成するとともに、周囲の係合孔(１５)を長孔で構成し、この長孔の係合孔(１５)の一端が中央の係合孔(１４)寄りに位置し、他端が補強板(１２)の周縁寄りに位置するように、長孔の係合孔(１５)を方向付けている。すなわち、図１(Ａ)に示すように、ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)と平行な向きに方向付けている。 The configuration of the engagement hole is as follows.
As shown in FIGS. 1 (A) and 1 (B), the central engagement hole (14) is a round hole, and the surrounding engagement hole (15) is a long hole. Orient the long engagement hole (15) so that one end of the hole (15) is located closer to the center engagement hole (14) and the other end is located closer to the periphery of the reinforcing plate (12). Yes. That is, as shown in FIG. 1 (A), when the breather valve (9) is viewed from above, the center point (14a) of the center engagement hole (14) and the center point of the surrounding engagement hole (15) ( 15a) is assumed and each engagement hole (15) of the surrounding elongated hole is oriented in a direction parallel to the radiation (18) passing through this engagement hole (15). .

図４に示す第２実施形態に係るエンジンのブリーザ装置は、図４(Ａ)に示すように、ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)に対して同じ向き(時計廻り方向)に所定角度(Θ)だけ傾けている。他の構造は、第１実施形態と同じであり、図４中、第１実施形態と同じ要素には、同じ符号を付しておく。   As shown in FIG. 4 (A), the breather device for an engine according to the second embodiment shown in FIG. 4 has a center point (14a) of the center engaging hole (14) when the breather valve (9) is viewed from above. ) And the center point (15a) of the surrounding engagement hole (15), the radiation (18) is assumed, and each engagement hole (15) of the surrounding long hole passes through the engagement hole (15). It is tilted by a predetermined angle (Θ) in the same direction (clockwise direction) with respect to the radiation (18). Other structures are the same as those of the first embodiment, and the same reference numerals are given to the same elements as those of the first embodiment in FIG.

本発明の第１実施形態に係るエンジンのブリーザ装置に用いるブリーザ弁を説明する図で、図１(Ａ)は平面図、図１(Ｂ)は図１(Ａ)のＢ−Ｂ線断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the breather valve used for the breather apparatus of the engine which concerns on 1st Embodiment of this invention, FIG. 1 (A) is a top view, FIG.1 (B) is the BB sectional drawing of FIG. It is. 本発明の第１実施形態に係るエンジンのブリーザ装置に用いるヘッドカバーの要部平面図で、バネケースとブリーザ弁とを取り外した図である。It is the principal part top view of the head cover used for the breather apparatus of the engine which concerns on 1st Embodiment of this invention, and is the figure which removed the spring case and the breather valve. 図２のIII−III線断面図で、バネケースとブリーザ弁とを取り付けた図である。It is the III-III sectional view taken on the line of FIG. 2, and the figure which attached the spring case and the breather valve. 本発明の第２実施形態に係るエンジンのブリーザ装置に用いるブリーザ弁を説明する図で、図４(Ａ)は平面図、図４(Ｂ)は図４(Ａ)のＢ−Ｂ線断面図である。FIG. 4A is a plan view of a breather valve used in a breather device for an engine according to a second embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A. It is. 従来技術に係るエンジンのブリーザ装置に用いるブリーザ弁を説明する図で、図５(Ａ)は平面図、図５(Ｂ)は図５(Ａ)のＢ−Ｂ線断面図である。It is a figure explaining the breather valve used for the breather apparatus of the engine concerning a prior art, and Drawing 5 (A) is a top view and Drawing 5 (B) is a BB line sectional view of Drawing 5 (A).

符号の説明Explanation of symbols

(１)…ヘッドカバー、(２)…ブリーザ通路、(３)…天井壁、(４)…弁取付用開口部、(５)…弁取付座、(６)…ブリーザ通路の通路入口、(７)…環状弁座、(８)…周囲空間、(９)…ブリーザ弁、(１０)…バネケース、(１１)…ゴム弁体、(１１ａ)…弁面、(１２)…補強板、(１３)…バネ、(１４)…係合孔、(１５)…係合孔、(１６)…突起、(１７)…径大部、(１８)…放射線、(Θ)…所定角度。
(1) ... head cover, (2) ... breather passage, (3) ... ceiling wall, (4) ... valve mounting opening, (5) ... valve mounting seat, (6) ... passage inlet of breather passage, (7 ) ... annular valve seat, (8) ... ambient space, (9) ... breather valve, (10) ... spring case, (11) ... rubber valve, (11a) ... valve surface, (12) ... reinforcing plate, (13) ) ... spring, (14) ... engagement hole, (15) ... engagement hole, (16) ... projection, (17) ... large diameter part, (18) ... radiation, (Θ) ... predetermined angle.

Claims (3)

ヘッドカバー(１)にブリーザ通路(２)を設け、ヘッドカバー(１)の天井壁(３)に弁取付用開口部(４)を設け、弁取付用開口部(４)の周縁に弁取付座(５)を設け、弁取付用開口部(４)の中央でブリーザ通路(２)の通路入口(６)を上向きに開口させ、この通路入口(６)の周囲に環状弁座(７)を設け、環状弁座(７)の周囲空間(８)をクランク室と連通させ、弁取付用開口部(４)を上からダイヤフラム型のブリーザ弁(９)で覆い、ブリーザ弁(９)を上から椀型のバネケース(１０)で覆い、ブリーザ弁(９)をゴム弁体(１１)と補強板(１２)とで構成し、ゴム弁体(１１)の周縁部を弁取付座(５)に着座させ、補強板(１２)をゴム弁体(１１)の上面に重ねて取り付け、バネケース(１０)に収容したバネ(１３)を補強板(１２)に当接させ、ゴム弁体(１１)の下面にある弁面(１１ａ)をバネ(１３)の付勢力で環状弁座(７)に着座させ、
補強板(１２)をゴム弁体(１１)に取り付けるに当たり、補強板(１２)の中央とその周囲に係合孔(１４)(１５)をあけ、ゴム弁体(１１)の上面の中央とその周囲に突起(１６)を設け、各突起(１６)を各係合孔(１４)(１５)に嵌入し、各係合孔(１４)(１５)の周縁部に各突起(１６)の径大部(１７)を係止させることにより、各突起(１６)を各係合孔(１４)(１５)に対して抜け止めした、エンジンのブリーザ装置において、
中央の係合孔(１４)を丸孔で構成するとともに、周囲の係合孔(１５)を長孔で構成し、この長孔の係合孔(１５)の一端が中央の係合孔(１４)寄りに位置し、他端が補強板(１２)の周縁寄りに位置するように、長孔の係合孔(１５)を方向付けた、ことを特徴とするエンジンのブリーザ装置。 A breather passage (2) is provided in the head cover (1), a valve mounting opening (4) is provided in the ceiling wall (3) of the head cover (1), and a valve mounting seat ( 5), the passage inlet (6) of the breather passage (2) is opened upward at the center of the valve mounting opening (4), and an annular valve seat (7) is provided around the passage inlet (6). The peripheral space (8) of the annular valve seat (7) communicates with the crank chamber, the valve mounting opening (4) is covered from above with a diaphragm type breather valve (9), and the breather valve (9) is covered from above. Covered with a saddle-shaped spring case (10), the breather valve (9) is composed of a rubber valve element (11) and a reinforcing plate (12), and the peripheral part of the rubber valve element (11) is attached to the valve mounting seat (5). The reinforcing plate (12) is attached to the upper surface of the rubber valve body (11) so as to be seated, and the spring (13) accommodated in the spring case (10) is brought into contact with the reinforcing plate (12), thereby the rubber valve body (11). The valve face (11a) on the lower surface of the Is seated on the annular valve seat (7) by the biasing force of the spring (13),
In attaching the reinforcing plate (12) to the rubber valve body (11), an engagement hole (14) (15) is formed in the center of the reinforcing plate (12) and its periphery, and the center of the upper surface of the rubber valve body (11) is formed. Protrusions (16) are provided on the periphery thereof, and the protrusions (16) are fitted into the engagement holes (14) and (15), and the protrusions (16) are formed on the peripheral portions of the engagement holes (14) and (15). In an engine breather device in which each protrusion (16) is prevented from coming off from each engagement hole (14) (15) by locking the large diameter portion (17).
The central engagement hole (14) is a round hole, and the surrounding engagement hole (15) is a long hole. One end of the long engagement hole (15) is the central engagement hole ( 14) A breather device for an engine, characterized in that the long engagement hole (15) is oriented so that the other end is located near the periphery of the reinforcing plate (12). 請求項１に記載したエンジンのブリーザ装置において、
ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)と平行な向きに方向付けた、ことを特徴とするエンジンのブリーザ装置。 The breather apparatus for an engine according to claim 1,
Assuming that the breather valve (9) is viewed from above, radiation (18) passing through the center point (14a) of the central engagement hole (14) and the center point (15a) of the surrounding engagement hole (15) is assumed. A breather device for an engine, wherein each of the surrounding long holes is oriented in a direction parallel to the radiation (18) passing through the holes (15). 請求項１に記載したエンジンのブリーザ装置において、
ブリーザ弁(９)を上から見て、中央の係合孔(１４)の中心点(１４ａ)と周囲の係合孔(１５)の中心点(１５ａ)とを通過する放射線(１８)を想定し、周囲の長孔の各係合孔(１５)をこの係合孔(１５)を通過する放射線(１８)に対して同じ向きに所定角度(Θ)だけ傾けた、ことを特徴とするエンジンのブリーザ装置。

The breather apparatus for an engine according to claim 1,
Assuming that the breather valve (9) is viewed from above, radiation (18) passing through the center point (14a) of the central engagement hole (14) and the center point (15a) of the surrounding engagement hole (15) is assumed. An engine characterized in that each engagement hole (15) of the surrounding long hole is inclined by a predetermined angle (Θ) in the same direction with respect to the radiation (18) passing through the engagement hole (15). Breather device.

JP2004198837A 2004-07-06 2004-07-06 Engine breather equipment Active JP4320284B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004198837A JP4320284B2 (en) 2004-07-06 2004-07-06 Engine breather equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004198837A JP4320284B2 (en) 2004-07-06 2004-07-06 Engine breather equipment

Publications (2)

Publication Number Publication Date
JP2006022650A JP2006022650A (en) 2006-01-26
JP4320284B2 true JP4320284B2 (en) 2009-08-26

Family

ID=35796119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004198837A Active JP4320284B2 (en) 2004-07-06 2004-07-06 Engine breather equipment

Country Status (1)

Country Link
JP (1) JP4320284B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7644706B1 (en) 2008-12-19 2010-01-12 Kubota Corporation Breather device for an engine
JP6069607B2 (en) * 2013-03-26 2017-02-01 株式会社国際電気通信基礎技術研究所 Robot service linkage system and platform
EP3985234A4 (en) 2019-06-12 2023-07-05 Kubota Corporation Blow-by gas recirculating device

Also Published As

Publication number Publication date
JP2006022650A (en) 2006-01-26

Similar Documents

Publication Publication Date Title
JP4738797B2 (en) Valve device
JP3992753B2 (en) gasket
JP4320284B2 (en) Engine breather equipment
JP4810522B2 (en) Blowby gas recirculation device for internal combustion engine
US11644115B2 (en) Fuel cap with duckbill valve
US20140174415A1 (en) Pcv valve apparatus
US20070262538A1 (en) Cylinder head gasket
US20030213479A1 (en) PCV valve guide
US6701961B2 (en) Reed valve
US7302925B2 (en) Manifold gasket having pushrod guide
JP2004519392A5 (en)
EP1098114A3 (en) Metal gasket assembly for cylinder head
KR101251711B1 (en) Closed crankcase ventilation comprising device for preventing oil backdraft
US20220306354A1 (en) Plug body and beverage container
JP3586926B2 (en) Valve stem seal for internal combustion engine
JP4695524B2 (en) Mounting structure of flow control valve for blow-by gas reduction device
JP2005315111A (en) Evaporative fuel adsorption device
KR100535585B1 (en) Reducing apparatus for pressure in a fuel tank
JP3876249B2 (en) Fuel injection valve seal structure
JP2548743Y2 (en) Safety structure of piston type pressure reducing device with V packing
JP3876248B2 (en) Fuel injection valve seal structure
JP5612910B2 (en) Pulsation damper of clutch operating device
JPS6121532Y2 (en)
JPH08232634A (en) Blow-by gas reducing flow control valve for internal combustion engine
JPS5826911Y2 (en) Pressure-resistant airtight tank cap

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060926

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090526

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090528

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090601

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120605

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4320284

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120605

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130605

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130605

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140605

Year of fee payment: 5