JPS5830126Y2 - Centrifugal advance device - Google Patents

Description

【考案の詳細な説明】 この考案は内燃機関の点火時期を機関の回転速度の上昇
に応じて進角させる遠心進角装置の改良に関する。[Detailed Description of the Invention] This invention relates to an improvement of a centrifugal advance device that advances the ignition timing of an internal combustion engine in accordance with an increase in the rotational speed of the engine.

この種装置として、機関により駆動される回転軸に固着
されたペースに各々枢軸を介して一対のガバナウェイト
を枢持させ、この各ガバナウェイトに植立した一対のピ
ンを、アームに形成された一対の窓に各々係合させ、上
記アームにより点火信号発生用作動部材を駆動して点火
時期を制御するものが周知である。As a device of this kind, a pair of governor weights are pivotally supported via respective pivots on a pace fixed to a rotating shaft driven by an engine, and a pair of pins erected on each governor weight are formed in an arm. It is well known to control the ignition timing by engaging a pair of windows and driving an ignition signal generating actuating member by the arm.

ところで、この種のもののピンと窓との係合部の各々に
はピンが窓内を摺動する方向、即ち回転軸の略半径方向
には進角巾に相等した空隙が形成されているが、回転軸
の円周方向には機関のトルク受動によって点火時期が変
動するのを防止するため、上記摺動を可能にし得る程度
の僅少な空隙しか形成されていない。Incidentally, in each of the engagement parts between the pin and the window of this type, a gap is formed in the direction in which the pin slides within the window, that is, in the approximately radial direction of the rotating shaft, and the gap is equal to the advance angle width. In order to prevent the ignition timing from fluctuating due to engine torque, only a small gap is formed in the circumferential direction of the rotating shaft to allow the above-mentioned sliding movement.

また、上記枢軸とピンの各々は回転軸に対して通常並行
に製作されるが、完全にはそうならない。Also, although each of the pivots and pins are typically fabricated parallel to the axis of rotation, this is not always the case.

即ち、ペースと回転軸、ペースと枢軸、ガバナウェイト
とピンは普通圧入により製造されるが、相互に完全な直
角とならず、またペース自体が曲がって完全平面となら
ないことがある。That is, the pace and rotation axis, the pace and pivot, and the governor weight and pin are usually manufactured by press-fitting, but they are not perfectly perpendicular to each other, and the pace itself may be curved and not perfectly flat.

このような場合、一方のガバナウェイト上のピンの飛開
軌跡と、他方のそれとが完全に一致せず、ガバナウェイ
トの飛開過程に於て、ピンと窓との係合部の各各が互い
に干渉し合いピンが窓の縁にひっかかって進角が途中で
止まったり、ピンと窓との摺動抵抗が大きくなって進角
特性が乱れる現象を呈す。In such a case, the flying locus of the pin on one governor weight does not completely match that on the other, and during the flying process of the governor weight, each part of the pin and the window engages with each other. The interference causes the pin to get caught on the edge of the window, causing the advance angle to stop midway, or the sliding resistance between the pin and the window to increase, causing the advance angle characteristics to be disturbed.

この傾向は、点火信号発生器とし°Ｑ析続器のカムホロ
アとカムとの機械的衝撃が伝わる機械式のものの場合は
比較的少ないが、今後多用される無接触式の磁石発電機
形等の場合に多く現われる。This tendency is relatively rare in the case of mechanical ignition signal generators that transmit the mechanical impact between the cam followers and cams of °Q coupling devices, but this tendency is relatively rare in the case of mechanical ignition signal generators that transmit the mechanical impact between the cam followers and cams of °Q coupling devices, but in the case of non-contact type magnet generators that will be used frequently in the future. It appears in many cases.

かかる製作不良をなくするため、従来から装置の組立時
に１つ１つガバナウェイトを手で開かせ、開かない場合
、手直しを施しているが、その手間に相当の時間を要す
る。In order to eliminate such manufacturing defects, conventionally, when assembling the device, the governor weights are opened one by one by hand, and if they do not open, the governor weights are repaired, but this process requires a considerable amount of time.

また、ピンＱ飛開摺動方向に於ける各ピンと窓との空隙
により進角巾が決定されるが、上記のようにピンが回転
軸に対して傾いたような場合、一方のピンと窓とが当接
した時、他方のピンと窓との間に未だ空隙が存在する状
態で最小進角及び最大進角が抑えられてしまい、進角中
が正規の値より小さくなる不具合が生じる。In addition, the advance angle width is determined by the gap between each pin and the window in the sliding direction of the pin Q, but if the pin is tilted with respect to the rotation axis as described above, the gap between one pin and the window When the two pins come into contact with each other, the minimum advance angle and the maximum advance angle are suppressed while there is still a gap between the other pin and the window, resulting in a problem that the advance angle becomes smaller than the normal value.

この考案は上記の不具合を大巾に削減した遠心進角装置
を提案するものである。This invention proposes a centrifugal advance device that greatly reduces the above-mentioned problems.

以下、図に示す実施例について説明する。The embodiment shown in the figures will be described below.

第１図及び第２図に於て、１は図示しない機関により嶌 駆動される回転軸、２はこの回転軸に嵌着されたベース
、３はこのベースに植立した一対の枢軸、４．５はこの
各枢軸に枢持された一対のガバナウェイト、６は上記ベ
ース２に固着された一対のばね掛げ、Ｔはこの各ばね掛
げと上記各ガバナウェイト４．５との間に張架された一
対のばね、８．９は上記各ガバナウェイト４．５の飛開
部に植立した一対のピン、１０はこの各ピンに係合した
窓１０ａと駆動面１０ｂを有するアームであり、上記ピ
ン８と窓１０ａとの係合部に於ける回転軸１の円周方向
の空隙は、ピン８が窓１：Ｏａ内を摺動し得る程度に僅
少に形成されており、またピン９は機関低速時を除いて
反駆動側に且つ飛開方向、及び回転軸１の中心方向には
アーム１０と接触しないようにアーム１０に切欠１０Ｃ
が形成されている。In FIGS. 1 and 2, 1 is a rotating shaft driven by an engine (not shown), 2 is a base fitted to this rotating shaft, 3 is a pair of pivots set on this base, 4. Reference numeral 5 denotes a pair of governor weights pivotally supported on each of the pivots, 6 a pair of spring hooks fixed to the base 2, and T a tension between each of the spring hooks and each governor weight 4.5. A pair of suspended springs, 8.9 are a pair of pins installed in the openings of each of the governor weights 4.5, and 10 is an arm having a window 10a and a drive surface 10b that are engaged with each of the pins. The gap in the circumferential direction of the rotating shaft 1 at the engagement portion between the pin 8 and the window 10a is formed so small that the pin 8 can slide inside the window 1:Oa, and 9 is a notch 10C in the arm 10 so that it does not come into contact with the arm 10 on the opposite drive side and in the flying direction and toward the center of the rotating shaft 1 except when the engine is at low speed.
is formed.

１１は上記アーム１０に嵌着され上記回転軸１に遊嵌さ
れたカムであり、これは図示しない断続器を駆動して点
火信号を発生させる。A cam 11 is fitted onto the arm 10 and loosely fitted onto the rotating shaft 1, and this cam drives a interrupter (not shown) to generate an ignition signal.

次に、このように構成された実施例の動作を説明する。Next, the operation of the embodiment configured as described above will be explained.

機関が始動し回転軸１が矢印１２方向に回転すると、ベ
ース２も回転し枢軸３、ガバナウェイト４．５、ピン８
．９、窓１０ａ１駆動面１０ｂ１アーム１０を介してカ
ム１１が駆動され断続器が開閉して点火信号が発生する
。When the engine starts and the rotating shaft 1 rotates in the direction of the arrow 12, the base 2 also rotates and the pivot 3, governor weight 4.5, pin 8
．． 9. The cam 11 is driven via the window 10a1, drive surface 10b1, and arm 10, and the interrupter opens and closes to generate an ignition signal.

機関の回転速度が上昇すると、ガバナウェイト４．５が
自らに働く遠心力によってばね７の引張力に抗して飛開
し、ピン８．９、窓１０ａ１駆動面１０ｂを介してアー
ム１０、カム１１を矢印１２方向に回転軸１に対して進
角さ七る。When the rotational speed of the engine increases, the governor weight 4.5 flies out against the tensile force of the spring 7 due to the centrifugal force acting on itself, and the arm 10 and the cam are 11 is advanced relative to the rotating shaft 1 in the direction of the arrow 12.

この際、ピン９はその反駆動側がアーム１０と係合して
いないが、ピン９０反駆動側であるため何等問題なく、
窓１０ａと同一形状で且つピン９に係合する窓が形成さ
れた従来のものと全く同様の特性で、円滑にアーム１０
を進角させることができる。At this time, the anti-drive side of the pin 9 is not engaged with the arm 10, but since the pin 90 is on the anti-drive side, there is no problem.
The arm 10 has exactly the same characteristics as the conventional one in which a window is formed that has the same shape as the window 10a and engages with the pin 9, and the arm 10 can be smoothly moved.
can be advanced.

また、上記のように各ガバナウェイト４．５に植立した
ピン８．９の飛開軌跡が多少相違することがあっても機
関低速時を除いては、上記のように、ピン９がその反駆
動側にはアーム１０と係合しないようにされているため
、ピン８．９、窓１０ａ、駆動面１０ｂの各保合部が互
いに干渉してピン８．９が窓１０ａ。Also, as mentioned above, even if the flying trajectories of the pins 8.9 installed on each governor weight 4.5 are slightly different, except when the engine is running at low speed, the pins 9 Since the anti-drive side is not engaged with the arm 10, the respective retaining parts of the pin 8.9, the window 10a, and the drive surface 10b interfere with each other, causing the pin 8.9 to engage with the window 10a.

駆動面１０ｂの途中でひっかかるようなことはなく円滑
に進角する。There is no catch in the middle of the drive surface 10b, and the angle advances smoothly.

そしてピン８が窓８内を摺動して窓８の端縁に当接した
時、最大進角状態となる。When the pin 8 slides within the window 8 and comes into contact with the edge of the window 8, the maximum advance angle is reached.

進角中は一方のピン８と窓１０ａとの空隙のみにより正
確に定まる。During advance, the angle is accurately determined only by the gap between one pin 8 and the window 10a.

即ちピン９が回転軸１の中心方向に傾いても、空隙Ｇ０
が形成されているのでアーム１０に当ることはな（、ま
た、飛開方向に傾いても切欠１０ｃが形成されているの
でアーム１０には当らず、従ってピン９によって進角巾
力槻制されることはない。That is, even if the pin 9 is tilted toward the center of the rotating shaft 1, the gap G0
is formed, so it will not hit the arm 10 (Also, even if it is tilted in the flying direction, it will not hit the arm 10 because the notch 10c is formed, so the advance angle width force is controlled by the pin 9. It never happens.

また、機関のトルク変動等に起因して回転軸１０角速度
が急激に低下したような場合には、カム１１、アーム１
０を、その回転慣性に抗して反矢印１２方向に戻す必要
があるが、この場合、ピン８が窓１０ａを介して応答良
くアーム１０を復帰させる。In addition, if the angular velocity of the rotating shaft 10 suddenly decreases due to engine torque fluctuations, etc., the cam 11, arm 1
It is necessary to return the arm 10 in the opposite direction of the arrow 12 against its rotational inertia, but in this case, the pin 8 returns the arm 10 in a responsive manner via the window 10a.

尚、以上は点火信号発生器としてカム１１と断続器から
なる機械式のものを用いた例を説明したが、カム１１を
他の点火信号発生用作動部材、例えば誘導子に置換え、
且つ断続器を磁石と信号コイル等に置換した磁石発電機
形等の無接触式のものを使用しても同等の作用効果を奏
し得る。Although the above example uses a mechanical type ignition signal generator consisting of a cam 11 and an interrupter, it is also possible to replace the cam 11 with another ignition signal generation operating member, such as an inductor.
In addition, a non-contact type interrupter such as a magnet generator type in which the interrupter is replaced with a magnet and a signal coil may be used to obtain the same effect.

また、第３図に示すようにピン９０所定移動範囲に対し
空隙Ｇ１．Ｇ２．Ｇ３を介した窓１０ｄを形成しても同
等Ｑ効果がある。Further, as shown in FIG. 3, the gap G1. G2. Even if the window 10d is formed through G3, the same Q effect can be obtained.

以上のように、この考案は二対のガバナウェイトの各々
に植立した一対のピンの一方に係合する窓と他方に係合
する駆動面とをアームに形成し、上記他方のピンが機関
低速時を除いて反駆動側に、且つ飛開方向及び回転軸心
方向にアームと接触しないようにしたものであり、各ガ
バナウェイトに植立したピンの各飛開軌跡が相違するこ
とによって、ピンが窓の途中でひっかかり進角不良が生
じることを解消し得、組立時の手直しを大巾に減少させ
ることができる。As described above, this invention forms a window in the arm that engages with one of a pair of pins installed in each of the two pairs of governor weights, and a drive surface that engages with the other, and the other pin is connected to the engine. It is designed so that it does not come into contact with the arm on the anti-drive side except at low speeds, as well as in the flying direction and rotational axis direction, and because the flying trajectories of the pins installed in each governor weight are different, It is possible to eliminate the problem that the pin gets caught in the middle of the window and causes an advance angle failure, and it is possible to greatly reduce the amount of rework required during assembly.

また、一方のピンと窓との空隙によって進角中が決定さ
れるため、一対のピンと窓を有する従来装置のように、
ピンの傾き等によって、ピンと窓との一対の空隙、即ち
進角中が互いに異なり正規の進角中が得られなくなると
いう不具合を解消し得る。In addition, since the advancing angle is determined by the gap between one pin and the window, unlike the conventional device with a pair of pins and a window,
It is possible to solve the problem that the gap between the pin and the window, that is, the advance angle differs from each other due to the inclination of the pin, and the normal advance angle cannot be obtained.

また、機関低速時に於てはピン９の位置がアーム１０に
対して固定されるため機関のトルク変動によりガバナウ
ェイト５が揺動してアーム１０が異常進角する不具合を
も防止し得る。Furthermore, since the position of the pin 9 is fixed relative to the arm 10 when the engine is running at low speed, it is possible to prevent the governor weight 5 from swinging due to engine torque fluctuations, thereby preventing the arm 10 from advancing abnormally.

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

第１図はこの考案の一実施例を示す平面図、第２図は第
１図実施例の正面図、第３図はこの考案の他の実施例を
示す平面図である。 図中１は回転軸、２はベース、３は枢軸、４．５はガバ
ナウェイト、８．９はピン、１０はアーム、１０ａは窓
、１０ｂは駆動面、１１はカムを示す。 尚、各図中同一符号は同一または相当部分を示す。FIG. 1 is a plan view showing one embodiment of this invention, FIG. 2 is a front view of the embodiment shown in FIG. 1, and FIG. 3 is a plan view showing another embodiment of this invention. In the figure, 1 is a rotating shaft, 2 is a base, 3 is a pivot, 4.5 is a governor weight, 8.9 is a pin, 10 is an arm, 10a is a window, 10b is a driving surface, and 11 is a cam. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 機関により駆動される回転軸、この回転軸に固着すした
ペース、このペースに各々枢軸を介して枢持され上記回
転軸の回転に伴い遠心力を受けて飛開する一対のガバナ
ウェイト、この各ガバナウェイトの飛開部に植立した一
対のピン、このピンの一方に係合した窓と他方のピンの
駆動側に係合した駆動面を有するアーム、このアームに
固着され上記回転軸に遊嵌した点火信号発生用作動部材
を備え、上記他方のピンが、その飛開方向、及び回転軸
心方向に、且つ機関低速時を除いて反駆動側に上記アー
ムと接触しないようにされた遠心進角装置。A rotary shaft driven by an engine, a pace fixed to the rotary shaft, a pair of governor weights each pivotally supported by the pace via a pivot shaft, and each of these A pair of pins planted in the opening of the governor weight, an arm having a window engaged with one of the pins and a drive surface engaged with the drive side of the other pin, and a pair of pins fixed to the arm and free from the rotation shaft. A centrifugal motor, comprising a fitted ignition signal generating actuation member, and the other pin is prevented from coming into contact with the arm on the non-drive side in the direction of its opening and in the direction of the rotational axis, except when the engine is at low speed. Advance angle device.