JPH09195727A - Valve rotator - Google Patents

Valve rotator

Info

Publication number
JPH09195727A
JPH09195727A JP867496A JP867496A JPH09195727A JP H09195727 A JPH09195727 A JP H09195727A JP 867496 A JP867496 A JP 867496A JP 867496 A JP867496 A JP 867496A JP H09195727 A JPH09195727 A JP H09195727A
Authority
JP
Japan
Prior art keywords
guide groove
compression coil
coil spring
rotator
pitch
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
JP867496A
Other languages
Japanese (ja)
Inventor
Takayuki Aoki
孝之 青木
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.)
Fuji Oozx Inc
Original Assignee
Fuji Oozx Inc
Fuji Valve 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 Fuji Oozx Inc, Fuji Valve Co Ltd filed Critical Fuji Oozx Inc
Priority to JP867496A priority Critical patent/JPH09195727A/en
Publication of JPH09195727A publication Critical patent/JPH09195727A/en
Pending legal-status Critical Current

Links

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent a deflecting load from applying to a compression coil spring by making the pitch on the outside larger than the pitch on the inside of the compression coil spring energizing a rolling member toward the shallow side of a guide groove, in a valve rotator rotating an engine valve around its axis. SOLUTION: A plurality of circular-arc-like guide grooves 5 are formed on the underside of an outward flange 3a of a rotator main body 3, and in each guide groove 5, a steel ball 6 and a compression coil spring 10 always energizing the steel ball 6 on the shallow side of the guide groove are received. In this case, the compression coil spring 10 is formed so that the pitch P on the outer circumferential side is made larger than the pitch P on the inner circumferential side, hence the winding axis L is made into a circular-arc-shape coaxial with the rotator main body 3, and the radius of curvature of the guide groove 5 is nearly conformed to that of the compression coil spring 10. Hereby the compression coil spring 10 is deformed in the same direction as the moving direction of the steel ball 6 along the guide groove 5, and a deflecting load is prevented from applying to the compression coil spring 10.

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、エンジンバルブ
を、その軸線回りに強制回転させるバルブローテータの
改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a valve rotator for forcibly rotating an engine valve around its axis.

【0002】[0002]

【従来の技術】エンジンバルブを軸線回りに強制回転さ
せるバルブローテータは通常、図4〜図6に示すような
構造となっている。すなわち、エンジンバルブ(1)の軸
端部に1対のコッタ(2)を介して止着され、かつ上端に
外向鍔(3a)を備えるローテータ本体(3)と、ローテータ
本体(3)に、上下方向に移動可能かつ相対回転可能とし
て外嵌された皿状のスプリングリテーナ(4)と、上記外
向鍔(3a)の下面に円周方向を向いて形成され、かつ上面
(溝底面)が一定方向に下向傾斜する傾斜面(5a)を備え
る複数の円弧状のガイド溝(5)と、このガイド溝(5)内
に転動可能に収容された鋼球(6)と、これとガイド溝
(5)の深い側の端部との間に縮設され、かつ鋼球(6)を
常時ガイド溝(5)の浅い側の端部に向かって付勢する圧
縮コイルばね(7)と、上記ローテータ本体(3)における
外向鍔(3a)の下面角部とスプリングリテーナ(4)に形成
された段部(4a)の角部との間に内外周縁が係止され、か
つ上面を鋼球(6)と当接させた皿ばね(8)とからなって
いる。
2. Description of the Related Art A valve rotator for forcibly rotating an engine valve around its axis usually has a structure as shown in FIGS. That is, the rotator main body (3), which is fixed to the shaft end of the engine valve (1) via the pair of cotters (2) and has the outward flange (3a) at the upper end, and the rotator main body (3), A dish-shaped spring retainer (4) externally fitted so as to be movable in the vertical direction and relatively rotatable, and formed on the lower surface of the outward flange (3a) in the circumferential direction and having a constant upper surface (groove bottom surface). A plurality of arc-shaped guide grooves (5) each having an inclined surface (5a) that inclines downward, a steel ball (6) rotatably accommodated in the guide grooves (5), and the guides. groove
A compression coil spring (7) that is compressed between the deep side end of (5) and constantly urges the steel ball (6) toward the shallow end of the guide groove (5); Inner and outer peripheral edges are locked between the lower surface corners of the outward flange (3a) and the corners of the step (4a) formed on the spring retainer (4) in the rotator body (3), and the upper surface is made of steel balls. It consists of (6) and the disc spring (8) in contact with it.

【0003】エンジンバルブ(1)が、ロッカアーム(図
示略)により押圧されて開き始め、弁ばね(9)の荷重が
増加すると、スプリングリテーナ(4)は、皿ばね(8)に
抗して上方へ移動する。それと同時に鋼球(6)は、図6
に示すように、皿ばね(8)に押圧され、圧縮コイルばね
(7)に抗して、ガイド溝(5)における傾斜面(5a)を上方
に向かって転動しようとする。
When the engine valve (1) starts to open by being pressed by a rocker arm (not shown) and the load of the valve spring (9) increases, the spring retainer (4) moves upward against the disc spring (8). Move to. At the same time, the steel ball (6) is shown in FIG.
As shown in Fig. 4, the compression coil spring is pressed by the disc spring (8).
It tries to roll upward on the inclined surface (5a) in the guide groove (5) against (7).

【0004】その結果、鋼球(6)の転動による水平方向
の力により、ローテータ本体(3)は、矢印方向に水平回
転させられ、エンジンバルブ(1)も、コッタ(2)を介し
て、軸線回りに間欠的に強制回転させられる。
As a result, the rotator body (3) is horizontally rotated in the direction of the arrow by the horizontal force due to the rolling of the steel ball (6), and the engine valve (1) is also passed through the cotter (2). , It is forced to rotate intermittently around the axis.

【0005】[0005]

【発明が解決しようとする課題】上述した従来のバルブ
ローテータでは、ガイド溝(5)内に収容した圧縮コイル
ばね(7)の巻き軸は直線的であるため、鋼球(6)が円弧
状をなすガイド溝(5)に沿って移動する方向と、圧縮コ
イルばね(7)の撓み方向とにずれが生じ、圧縮コイルば
ね(7)に偏荷重が作用する。
In the above-described conventional valve rotator, since the winding axis of the compression coil spring (7) housed in the guide groove (5) is linear, the steel ball (6) has an arc shape. A deviation occurs between the direction of movement along the guide groove (5) and the bending direction of the compression coil spring (7), and an unbalanced load acts on the compression coil spring (7).

【0006】このようになると、圧縮コイルばね(7)
が、外側に湾曲したり、座屈したりして、鋼球(6)の保
持状態が不安定となり、バルブローテータとしての機能
が損なわれることがある。
In this case, the compression coil spring (7)
However, the steel ball (6) may be bent outward or may be buckled to make the holding state of the steel ball (6) unstable, and the function as the valve rotator may be impaired.

【0007】本発明は、上記問題に鑑みてなされたもの
で、鋼球の移動方向と圧縮コイルばねの撓み方向とを整
合させることにより、圧縮コイルばねが外側に湾曲した
り、座屈したりするのを防止し、信頼性に優れるバルブ
ローテータを提供することを目的としている。
The present invention has been made in view of the above problems, and the compression coil spring bends outward or buckles by aligning the moving direction of the steel ball with the bending direction of the compression coil spring. The purpose is to provide a highly reliable valve rotator.

【0008】[0008]

【課題を解決するための手段】本発明によると、上記課
題は、外向鍔を備え、かつ上下方向を向くエンジンバル
ブの軸に嵌合されたローテータ本体と、このローテータ
本体に、上下方向に移動可能かつ相対回転可能として嵌
合されたスプリングリテーナと、このスプリングリテー
ナと前記外向鍔との上下の対向面のいずれか一方に、前
記軸を中心とする円弧状に湾曲して形成され、かつ溝の
底面が、一定方向に漸次浅くなる傾斜面をなす複数のガ
イド溝と、このガイド溝内に移動可能として収容され、
かつ一部が前記ガイド溝より出没しうる転動部材と、前
記ガイド溝内における前記転動部材とガイド溝の深い側
の端面との間に縮設されて、転動部材を常時ガイド溝の
浅い側に向かって付勢する圧縮コイルばねと、前記ロー
テータ本体とスプリングリテーナとの間に、上下いずれ
か一方の面が前記転動部材と当接しうるようにして設け
られた皿ばねとを備えるバルブローテータにおいて、前
記圧縮コイルばねを、その外周側のピッチを、内周側の
ピッチよりも大とすることにより、曲率半径が前記ガイ
ド溝のそれとほぼ等しい円弧状に形成することにより解
決される。
According to the present invention, the above-mentioned problem is solved by the present invention. A rotator main body having an outward flange and fitted to a shaft of an engine valve facing in the vertical direction, and a rotator main body movable in the vertical direction. Spring retainer fitted so as to be rotatable relative to each other, and one of the upper and lower facing surfaces of the spring retainer and the outward flange, which are curved in an arc shape around the shaft, and are formed in a groove. The bottom surface of the plurality of guide grooves forming an inclined surface that gradually becomes shallower in a certain direction, and accommodated movably in the guide grooves,
And a part of the rolling member that can project from and retract into the guide groove, and the rolling member is contracted between the rolling member and the end surface on the deep side of the guide groove in the guide groove, and the rolling member is always provided in the guide groove. A compression coil spring that urges toward the shallow side, and a disc spring provided between the rotator body and the spring retainer so that either one of the upper and lower surfaces can contact the rolling member. In the valve rotator, the compression coil spring is formed in an arc shape having a radius of curvature substantially equal to that of the guide groove by making the pitch on the outer peripheral side larger than the pitch on the inner peripheral side. .

【0009】[0009]

【発明の実施の形態】以下、本発明の実施例を、図面に
基づいて説明する。なお、本発明は、上述した従来のバ
ルブローテータを部分的に改良したものであるため、バ
ルブローテータの全体図及び各構成部材の詳細な説明を
省略し、要部のみを図示する。
Embodiments of the present invention will be described below with reference to the drawings. Since the present invention is a partial improvement of the above-described conventional valve rotator, a general view of the valve rotator and detailed description of each constituent member are omitted, and only essential parts are shown.

【0010】図1及び図2に示すように、ローテータ本
体(3)における外向鍔(3a)の下面に形成された円弧状を
なす複数のガイド溝(5)内には、従来と同様、鋼球(6)
と、これを常時ガイド溝(5)の浅い側に向かって付勢す
る圧縮コイルばね(10)とが収容されている。
As shown in FIGS. 1 and 2, in the plurality of arc-shaped guide grooves (5) formed on the lower surface of the outward flange (3a) of the rotator body (3), the steel is formed in the same manner as in the conventional case. Sphere (6)
And a compression coil spring (10) for constantly urging this toward the shallow side of the guide groove (5).

【0011】圧縮コイルばね(10)は、図2、図3(図3
はフリーの状態)に詳細を示すように、その外周側のピ
ッチ(P1)を内周側のピッチ(P2)よりも大とすることに
より、巻き軸(L)を、ローテータ本体(3)と同軸をなす
円弧状とし、ガイド溝(5)と圧縮コイルばね(10)との曲
率半径がほぼ一致するようにしてある。
The compression coil spring (10) is shown in FIGS.
As shown in detail in (Free state), by setting the pitch (P 1 ) on the outer peripheral side of the rotor to be larger than the pitch (P 2 ) on the inner peripheral side, the winding shaft (L) is moved to the rotator main body (3). ), The guide groove (5) and the compression coil spring (10) have substantially the same radius of curvature.

【0012】このようにすると、鋼球(6)がガイド溝
(5)に沿って移動する方向と同方向に、圧縮コイルばね
(10)も撓むようになり、圧縮コイルばね(10)に偏荷重が
作用するのが防止される。その結果、圧縮コイルばね(1
0)が外側に湾曲したり、座屈したりすることがなくな
り、鋼球(6)は安定的に保持される。
With this arrangement, the steel ball (6) is guided by the guide groove.
In the same direction as moving along (5), the compression coil spring
The (10) also bends, and an unbalanced load is prevented from acting on the compression coil spring (10). As a result, the compression coil spring (1
The steel ball (6) is stably held because the (0) is not bent outward or buckled.

【0013】本発明は、転動部材である鋼球(6)のかわ
りに、ローラを用いたバルブローテータにも適用しう
る。
The present invention can be applied to a valve rotator using rollers instead of the steel balls (6) which are rolling members.

【0014】[0014]

【発明の効果】本発明によれば、転動部材(鋼球)の移
動方向と圧縮コイルばねの撓み方向とがほぼ一致してい
るため、圧縮コイルばねに偏荷重が作用するのが防止さ
れ、それが外側に湾曲したり、座屈したりする恐れがな
くなる。その結果、転動部材は安定的に保持され、長時
間使用しても、バルブローテータとしての機能が損なわ
れる恐れはなく、信頼性が大幅に向上する。
According to the present invention, since the moving direction of the rolling member (steel ball) and the bending direction of the compression coil spring are substantially the same, it is possible to prevent an unbalanced load from acting on the compression coil spring. , There is no risk of it bending outwards or buckling. As a result, the rolling member is stably held, and even if it is used for a long time, the function as the valve rotator is not impaired, and the reliability is greatly improved.

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

【図1】本発明の一実施例を示す要部の底面図である。FIG. 1 is a bottom view of essential parts showing an embodiment of the present invention.

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

【図3】同じく圧縮コイルばねのフリー状態での平面図
である。
FIG. 3 is a plan view of the compression coil spring in a free state.

【図4】従来のバルブローテータの半断面図である。FIG. 4 is a half sectional view of a conventional valve rotator.

【図5】同じくローテータ本体の底面図である。FIG. 5 is a bottom view of the rotator body.

【図6】同じく図4におけるVI−VI線に沿う要部の拡大
縦断側面図である。
FIG. 6 is an enlarged vertical side view of the main part of the same taken along line VI-VI in FIG.

【符号の説明】[Explanation of symbols]

(1)エンジンバルブ (2)コッタ (3)ローテータ本体 (3a)鍔部 (4)スプリングリテーナ (4a)段部 (5)ガイド溝 (5a)傾斜面 (6)鋼球(転動部材) (7)圧縮コイルばね (8)皿ばね (9)バルブスプリング (10)圧縮コイルばね (L)巻き軸 (P1)(P2)ピッチ(1) Engine valve (2) Cotter (3) Rotator body (3a) Collar (4) Spring retainer (4a) Step (5) Guide groove (5a) Slope (6) Steel ball (rolling member) ( 7) Compression coil spring (8) Disc spring (9) Valve spring (10) Compression coil spring (L) Winding shaft (P 1 ) (P 2 ) Pitch

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外向鍔を備え、かつ上下方向を向くエン
ジンバルブの軸に嵌合されたローテータ本体と、このロ
ーテータ本体に、上下方向に移動可能かつ相対回転可能
として嵌合されたスプリングリテーナと、このスプリン
グリテーナと前記外向鍔との上下の対向面のいずれか一
方に、前記軸を中心とする円弧状に湾曲して形成され、
かつ溝の底面が、一定方向に漸次浅くなる傾斜面をなす
複数のガイド溝と、このガイド溝内に移動可能として収
容され、かつ一部が前記ガイド溝より出没しうる転動部
材と、前記ガイド溝内における前記転動部材とガイド溝
の深い側の端面との間に縮設されて、転動部材を常時ガ
イド溝の浅い側に向かって付勢する圧縮コイルばねと、
前記ローテータ本体とスプリングリテーナとの間に、上
下いずれか一方の面が前記転動部材と当接しうるように
して設けられた皿ばねとを備えるバルブローテータにお
いて、 前記圧縮コイルばねを、その外周側のピッチを、内周側
のピッチよりも大とすることにより、曲率半径が前記ガ
イド溝のそれとほぼ等しい円弧状に形成したことを特徴
とするバルブローテータ。
1. A rotator main body having an outward flange and fitted to a shaft of an engine valve facing up and down, and a spring retainer fitted to the rotator main body so as to be vertically movable and relatively rotatable. Formed on one of the upper and lower facing surfaces of the spring retainer and the outward flange curved in an arc shape with the axis as a center,
And a plurality of guide grooves each having a bottom surface of the groove that forms an inclined surface that becomes gradually shallower in a certain direction, a rolling member that is movably accommodated in the guide grooves, and a part of which can project from and retract into the guide groove, A compression coil spring that is compressed between the rolling member and the end surface on the deep side of the guide groove in the guide groove, and constantly biases the rolling member toward the shallow side of the guide groove.
A valve rotator comprising: a disc spring provided between the rotator body and a spring retainer such that one of upper and lower surfaces thereof can come into contact with the rolling member, wherein the compression coil spring has an outer peripheral side thereof. The valve rotator is formed in a circular arc shape having a radius of curvature substantially equal to that of the guide groove by making the pitch of the guide groove larger than the pitch of the inner peripheral side.
JP867496A 1996-01-22 1996-01-22 Valve rotator Pending JPH09195727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP867496A JPH09195727A (en) 1996-01-22 1996-01-22 Valve rotator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP867496A JPH09195727A (en) 1996-01-22 1996-01-22 Valve rotator

Publications (1)

Publication Number Publication Date
JPH09195727A true JPH09195727A (en) 1997-07-29

Family

ID=11699489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP867496A Pending JPH09195727A (en) 1996-01-22 1996-01-22 Valve rotator

Country Status (1)

Country Link
JP (1) JPH09195727A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030047250A (en) * 2001-12-10 2003-06-18 현대자동차주식회사 Valve instrument
CN111720186A (en) * 2020-07-13 2020-09-29 中船动力有限公司 Diesel engine air valve rotating device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030047250A (en) * 2001-12-10 2003-06-18 현대자동차주식회사 Valve instrument
CN111720186A (en) * 2020-07-13 2020-09-29 中船动力有限公司 Diesel engine air valve rotating device
CN111720186B (en) * 2020-07-13 2023-09-01 中船动力有限公司 Air valve rotating device of diesel engine

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