JP2010133483A - Scissors gear - Google Patents

Scissors gear Download PDF

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JP2010133483A
JP2010133483A JP2008309642A JP2008309642A JP2010133483A JP 2010133483 A JP2010133483 A JP 2010133483A JP 2008309642 A JP2008309642 A JP 2008309642A JP 2008309642 A JP2008309642 A JP 2008309642A JP 2010133483 A JP2010133483 A JP 2010133483A
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gear
sub
main
teeth
tooth
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JP5284065B2 (en
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Eiya Sugimura
永哉 杉村
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Hino Motors Ltd
日野自動車株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a scissors gear simply assembled only by inserting a gear tooth of an interlock partner gear between the gear teeth of a main gear and a sub gear without any manual operation for aligning the tooth faces of the main gear and the sub gear. <P>SOLUTION: In the position where the sub gear 3 is urged relative to the main gear 2 in the predetermined rotational direction, and rotated in the urging direction only by a shift amount slightly little larger than the backlash of the interlock partner gear from the set position with tooth faces adjusted with each other, the scissors gear 10 limits the range of movement of the sub gear 3. Viewed from the inserting direction (direction of arrow A), when the gear tooth of the interlock partner gear is meshed, a portion with a step formed by extension of the main gear 2 following the preceding sub gear 3 is so chamfered as to form a guide surface 11 for guiding the gear teeth of the interlock partner gear from between gear teeth 3x of the sub gear 3 to between gear teeth 2x of the main gear 2 in the chamfered position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は原動機の回転変動に起因した打音低減を図るためのシザースギヤに関するものである。   The present invention relates to a scissor gear for reducing hammering sound caused by rotational fluctuations of a prime mover.
噛合した一対のギヤが滑らかに無理なく回転するためには、その歯面間にバックラッシと呼ばれる遊びを持たせる必要があるが、車両用エンジン等の原動機から駆動対象へ動力を伝達するギヤトレーンでは、互いに噛合しているギヤの歯面が原動機の回転変動により突き合って打音を発することがあるため、一段ギヤ機構の一方のギヤにシザースを用い、打音低減を図ることが一般的に実施されている(例えば、特許文献1参照)。   In order for a pair of meshed gears to rotate smoothly and effortlessly, it is necessary to have a play called backlash between the tooth surfaces. Since the tooth surfaces of the gears meshing with each other may come into contact with each other due to fluctuations in the rotation of the prime mover, it is common practice to reduce the sound by using scissors on one gear of the one-stage gear mechanism. (For example, refer to Patent Document 1).
図4は従来におけるシザースギヤの一例を示すもので、この種のシザースギヤ1は、噛合相手側ギヤに噛合するメインギヤ2と、該メインギヤ2と同歯数で且つ噛合相手側ギヤに噛合する一方のサブギヤ3とを備え、これらメインギヤ2及びサブギヤ3を同軸に重ね合わせて配置し且つその相互間に周方向への付勢力(捩じり力)を付与するためのトーションスプリング4を介装した構成を採っている。   FIG. 4 shows an example of a conventional scissor gear. This type of scissor gear 1 includes a main gear 2 that meshes with a meshing counterpart gear, and one sub-gear that has the same number of teeth as the main gear 2 and meshes with the meshing counterpart gear. 3, the main gear 2 and the sub gear 3 are arranged so as to be coaxially overlapped with each other, and a torsion spring 4 for providing a biasing force (torsional force) in the circumferential direction therebetween is interposed. I'm taking it.
即ち、図5に示す通り、メインギヤ2とサブギヤ3との間にC字状のトーションスプリング4を同心状に介装すると共に、該トーションスプリング4の一端をノックピン5(第一のノックピン)を介しメインギヤ2側に固定し且つ他端をノックピン6(第二のノックピン)を介しサブギヤ3側に固定するようにしてある。   That is, as shown in FIG. 5, a C-shaped torsion spring 4 is concentrically interposed between the main gear 2 and the sub gear 3, and one end of the torsion spring 4 is interposed via a knock pin 5 (first knock pin). It is fixed to the main gear 2 side and the other end is fixed to the sub gear 3 side via a knock pin 6 (second knock pin).
そして、サブギヤ3をメインギヤ2に対しトーションスプリング4のC字を開く方向に相対的に回転させて付勢力を生じさせた状態で噛合相手側ギヤのギヤ歯をメインギヤ2及びサブギヤ3のギヤ歯2x,3x間に挿し入れて噛み合わせると、メインギヤ2の歯面とサブギヤ3の歯面とが噛合相手側ギヤの歯面を挟む状態となり、見掛け上、バックラッシがなくなって、原動機の回転変動に起因した打音低減が図られることになる。   Then, the gear teeth of the meshing counterpart gear are set to the gear teeth 2x of the main gear 2 and the sub gear 3 in a state where the sub gear 3 is rotated relative to the main gear 2 in the direction of opening the C-shape of the torsion spring 4 to generate an urging force. , 3x, and meshed, the tooth surface of the main gear 2 and the tooth surface of the sub gear 3 sandwich the tooth surface of the meshing counterpart gear, and apparently no backlash, resulting from rotational fluctuations of the prime mover The hitting sound is reduced.
ただし、このようなシザースギヤ1においては、その組み付け前のフリー状態において、図5中に二点鎖線で示すフリー位置aまでサブギヤ3が相対的に回転し、図6に示す如く、メインギヤ2とサブギヤ3の歯筋が大きくずれた状態となって、噛合相手側ギヤへの組み付けができないため、図7に示す如く、メインギヤ2に対するサブギヤ3の相対的な回転位置を、トーションスプリング4による所定の付勢力が得られ且つ相互の歯筋が揃うセット位置bに合わせて固定ボルト7によりサブギヤ3をメインギヤ2側に仮固定し、噛合相手側ギヤへの組み付けが完了した後に固定ボルト7を取り外すという面倒な作業が必要となった。   However, in such a scissor gear 1, in a free state before the assembly, the sub gear 3 relatively rotates to a free position a indicated by a two-dot chain line in FIG. 5, and as shown in FIG. 6, the main gear 2 and the sub gear 3 is greatly displaced and cannot be assembled to the meshing counterpart gear. Therefore, as shown in FIG. 7, the relative rotational position of the sub gear 3 with respect to the main gear 2 is determined by a predetermined attachment by the torsion spring 4. The sub-gear 3 is temporarily fixed to the main gear 2 side by the fixing bolt 7 in accordance with the set position b where the force is obtained and the mutual tooth traces are aligned, and the fixing bolt 7 is removed after the assembly to the meshing counterpart gear is completed. It was necessary to work.
即ち、実際の現場作業では、手前に構造物が邪魔をしているような複雑に入り組んだ場所にシザースギヤ1を取り付けなければならなかったり、ギヤカバーの装着後に取り付けを行わなければならなかったりするため、シザースギヤ1の取り付け後に手前の構造物を避けながら固定ボルト7を取り外したり、ギヤカバーに開けた窓を通して固定ボルト7を取り外したりする作業に多大な手間を要していた。   That is, in actual field work, the scissor gear 1 must be attached to a complicated place where the structure is obstructing in the foreground, or it must be attached after the gear cover is attached. After mounting the scissor gear 1, it takes a lot of work to remove the fixing bolt 7 while avoiding the front structure and to remove the fixing bolt 7 through a window opened in the gear cover.
そこで、本発明者は、図8及び図9に示す如く、メインギヤ2に対するサブギヤ3の相対的な回転位置を前記セット位置b(図2参照)に固定し得るようメインギヤ2側にノックピン6が嵌まり込む固定穴8を設けると共に、該固定穴8に噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけサブギヤ3のセット位置bから付勢方向に向けた回転を許容し得るようガタ9を付した構造を創案するに到った。   Therefore, as shown in FIGS. 8 and 9, the present inventor has fitted the knock pin 6 on the main gear 2 side so that the relative rotational position of the sub gear 3 with respect to the main gear 2 can be fixed at the set position b (see FIG. 2). A fixing hole 8 is provided, and a backlash 9 is allowed to allow the sub-gear 3 to rotate in the urging direction from the set position b of the sub-gear 3 by an amount slightly larger than the backlash with the meshing counterpart gear. It came to invent a structure with a mark.
尚、サブギヤ3側に備えられたノックピン6は、前記メインギヤ2側に新たに設けられた固定穴8に嵌まり込ませる必要があるため、トーションスプリング4の配置位置を超えてメインギヤ2側へ張り出し得るよう従来より長さ寸法を長く設定したものに変更してある。   The knock pin 6 provided on the sub-gear 3 side needs to be fitted in the fixing hole 8 newly provided on the main gear 2 side, so that it protrudes beyond the arrangement position of the torsion spring 4 to the main gear 2 side. The length has been changed to a longer one than before.
而して、このような構造を採用すれば、メインギヤ2に対するサブギヤ3の相対的な回転位置が、トーションスプリング4による所定の付勢力が得られ且つ相互の歯筋が揃うセット位置bから前記固定穴8のガタ9分だけ前記トーションスプリング4の付勢方向にずれた図10に示す如き位置に決まるので、シザースギヤ1を組み付ける際に、メインギヤ2とサブギヤ3の何れか一方を先に噛合相手側ギヤに噛み合わせた後に他方を僅かに回転させるだけで相互の歯筋が揃い、シザースギヤ1の噛合相手側ギヤへの組み付けが可能となる。   Thus, if such a structure is adopted, the relative rotational position of the sub gear 3 with respect to the main gear 2 is fixed from the set position b where a predetermined urging force is obtained by the torsion spring 4 and the mutual tooth traces are aligned. Since the position shown in FIG. 10 is shifted in the biasing direction of the torsion spring 4 by the backlash 9 of the hole 8, when the scissor gear 1 is assembled, one of the main gear 2 and the sub gear 3 is first engaged with the meshing counterpart. After meshing with the gear, the other tooth traces are aligned just by slightly rotating the other, and the scissor gear 1 can be assembled to the meshing counterpart gear.
尚、固定穴8のガタ9には、噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分が確保されているため、メインギヤ2の歯面とサブギヤ3の歯面とが噛合相手側ギヤの歯面を確実に挟む状態となってバックラッシが打ち消され、原動機の回転変動に起因した打音低減が従前通りに図られる。
特開2007−71366号公報
Since the backlash with the meshing counterpart gear is secured in the play 9 of the fixing hole 8, the tooth surface of the main gear 2 and the tooth surface of the sub gear 3 are connected to the meshing counterpart gear. The backlash is canceled out by pinching the tooth surface reliably, and the hitting sound due to the rotational fluctuation of the prime mover is reduced as before.
JP 2007-71366 A
しかしながら、上記提案の構造においては、噛合相手側ギヤへの組み付け時に、メインギヤ2とサブギヤ3の相互の歯筋が揃うセット位置bから前記固定穴8のガタ9分だけ前記トーションスプリング4の付勢方向にずれた状態となるため、僅かながら手動でトーションスプリング4の付勢力に抗しサブギヤ3を回転させて歯筋を揃える操作が必要となるが、このような僅かな手動操作さえも不要として更なる組み付け性の向上を図ることが望まれている。   However, in the structure proposed above, the urging force of the torsion spring 4 is set by the backlash 9 of the fixing hole 8 from the set position b where the mutual teeth of the main gear 2 and the sub gear 3 are aligned when assembled to the meshing counterpart gear. Since the position is shifted in the direction, it is necessary to slightly rotate the sub gear 3 against the urging force of the torsion spring 4 and align the tooth traces, but even such a slight manual operation is unnecessary. It is desired to further improve the assembly.
本発明は上述した実情に鑑みてなしたもので、メインギヤとサブギヤとの歯筋を揃えるための手動操作を行わなくても、噛合相手側ギヤのギヤ歯をメインギヤ及びサブギヤのギヤ歯間に挿し入れるだけで簡便に組み付けを行い得る新規なシザースギヤ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 circumstances, and the gear teeth of the meshing counterpart gear are inserted between the gear teeth of the main gear and the sub gear without performing manual operation for aligning the tooth traces of the main gear and the sub gear. The object is to provide a new scissor gear that can be easily assembled by simply inserting it.
本発明は、メインギヤに対しサブギヤが所定の回転方向に付勢され且つ相互の歯筋が揃うセット位置から噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけ付勢方向に回転した位置でサブギヤの可動範囲が制限されるようにしたシザースギヤであって、噛合相手側ギヤのギヤ歯をメインギヤ及びサブギヤのギヤ歯間に挿し入れて噛み合わせる際の挿入方向から見て、メインギヤ及びサブギヤのうちの先行する一方に対し後に続く他方が張り出して段差を形成してしまう部位を面取りし、その面取り箇所に前記噛合相手側ギヤのギヤ歯を前記メインギヤ及びサブギヤのうちの先行する一方のギヤ歯間から後に続く他方のギヤ歯間へ案内するガイド面を形成したことを特徴とするものである。   The present invention is a position in which the sub gear is urged in the predetermined rotation direction with respect to the main gear and is rotated in the urging direction by an amount slightly larger than the backlash with the meshing counterpart gear from the set position where the mutual tooth traces are aligned. A scissor gear in which the movable range of the sub gear is limited, and the gear teeth of the meshing counterpart gear are inserted between the gear teeth of the main gear and the sub gear, and viewed from the insertion direction when meshing, of the main gear and the sub gear. Chamfer a portion where the other following the other one overhangs to form a step, and the gear teeth of the meshing counterpart gear are placed at the chamfered portion between the front gear teeth of the main gear and the sub gear. A guide surface that guides between the other gear teeth that follow is formed.
而して、このようにすれば、噛合相手側ギヤのギヤ歯をメインギヤ及びサブギヤのギヤ歯間に挿し入れるだけで、噛合相手側ギヤのギヤ歯がガイド面によりメインギヤ及びサブギヤのうちの先行する一方のギヤ歯間から後に続く他方のギヤ歯間へと円滑に案内され、先行する一方のギヤ歯を反付勢方向に押し戻しつつ、後に続く他方のギヤ歯間へと噛合相手側ギヤのギヤ歯が進入していくことになり、該噛合相手側ギヤのギヤ歯がメインギヤ及びサブギヤの両方に入り込んだ時点では、両者のずれ量がバックラッシ相当分に戻された状態となり、メインギヤの歯面とサブギヤの歯面とが噛合相手側ギヤの歯面を挟む状態となってバックラッシが打ち消される。   Thus, by simply inserting the gear teeth of the meshing counterpart gear between the gear teeth of the main gear and the sub gear, the gear teeth of the meshing counterpart gear are preceded by the guide surface of the main gear and the sub gear. Smoothly guided from one gear tooth to the other, following the other gear teeth, while pushing back the preceding one gear gear in the counter-biasing direction, the gear of the mating counterpart gear between the other gear teeth following When the gear teeth of the meshing counterpart gear enter both the main gear and the sub gear, the amount of deviation of both is returned to the amount corresponding to the backlash, and the tooth surface of the main gear The backlash is canceled by the state in which the tooth surface of the sub gear sandwiches the tooth surface of the meshing counterpart gear.
また、メインギヤに対するサブギヤの可動範囲を制限する具体的な機構としては、例えば、メインギヤとサブギヤとの間にC字状のトーションスプリングを同心状に介装し、該トーションスプリングの一端を第一のノックピンを介しメインギヤ側に固定し且つ他端を第二のノックピンを介しサブギヤ側に固定すると共に、メインギヤに対するサブギヤの相対的な回転位置をトーションスプリングによる所定の付勢力が得られ且つ相互の歯筋が揃うセット位置に固定し得るようメインギヤ側に第二のノックピンが嵌まり込む固定穴を設け、該固定穴に噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけサブギヤのセット位置から付勢方向に向けた回転を許容し得るようガタを付しておくことが好ましい。   Further, as a specific mechanism for limiting the movable range of the sub gear relative to the main gear, for example, a C-shaped torsion spring is interposed between the main gear and the sub gear, and one end of the torsion spring is connected to the first gear. While fixing to the main gear side via the knock pin and fixing the other end to the sub gear side via the second knock pin, the relative rotational position of the sub gear with respect to the main gear can be obtained with a predetermined urging force by a torsion spring, and mutual tooth traces A fixing hole into which the second dowel pin is fitted is provided on the main gear side so that it can be fixed at the set position where the two gears are aligned, and the fixing hole is attached from the setting position of the sub gear by a slightly larger amount of deviation than the backlash with the mating counterpart gear. It is preferable to add a backlash so as to allow rotation in the urging direction.
而して、このように構成した場合に、メインギヤに対しサブギヤをトーションスプリングの付勢力が発生する方向に相対的に回転させ、サブギヤ側に備えられている第二のノックピンをメインギヤ側の固定穴に嵌め込むと、メインギヤに対するサブギヤの相対的な回転位置が、トーションスプリングによる所定の付勢力が得られ且つ相互の歯筋が揃うセット位置から前記固定穴のガタ分だけ前記トーションスプリングの付勢方向にずれた位置に決まり、メインギヤに対するサブギヤの可動範囲が前記ガタ付きの固定穴により制限されることになる。   Thus, in this case, the sub gear is rotated relative to the main gear in the direction in which the urging force of the torsion spring is generated, and the second knock pin provided on the sub gear side is fixed to the fixing hole on the main gear side. When the gear is fitted into the main gear, the relative rotational position of the sub gear is such that the predetermined biasing force by the torsion spring is obtained, and the biasing direction of the torsion spring by the backlash of the fixing hole from the set position where the mutual tooth traces are aligned. Therefore, the movable range of the sub gear with respect to the main gear is limited by the fixed hole with play.
本発明のシザースギヤによれば、下記の如き種々の優れた効果を奏し得る。   According to the scissor gear of the present invention, the following various excellent effects can be obtained.
(I)本発明の請求項1に記載の発明によれば、メインギヤとサブギヤとの歯筋を揃えるための手動操作を行わなくても、噛合相手側ギヤのギヤ歯をメインギヤ及びサブギヤのギヤ歯間に挿し入れるだけで簡便に組み付けを行うことができ、シザースギヤの組み付け性を従来よりも大幅に向上することができる。   (I) According to the invention described in claim 1 of the present invention, the gear teeth of the mating counterpart gear can be changed to the gear teeth of the main gear and the sub gear without performing a manual operation for aligning the tooth traces of the main gear and the sub gear. Assembling can be performed simply by inserting them in between, and the assembling property of the scissor gear can be greatly improved as compared with the conventional case.
(II)本発明の請求項2に記載の発明によれば、メインギヤに固定穴を新たに穿設するだけで第二のノックピンにサブギヤをセット位置付近に固定する機能を持たせることができ、構造の複雑化(部品点数の増加)を招くことなくメインギヤに対するサブギヤの可動範囲を制限することができる。   (II) According to the invention described in claim 2 of the present invention, it is possible to provide the second knock pin with a function of fixing the sub gear near the set position only by newly forming a fixing hole in the main gear. The movable range of the sub gear relative to the main gear can be limited without incurring a complicated structure (increase in the number of parts).
以下本発明の実施の形態を図面を参照しつつ説明する。   Embodiments of the present invention will be described below with reference to the drawings.
図1及び図2は本発明を実施する形態の一例を示すもので、図4〜図7と同一の符号を付した部分は同一物を表わしている。   1 and 2 show an example of an embodiment for carrying out the present invention, and the same reference numerals as those in FIGS. 4 to 7 denote the same components.
図1に示す如く、ここに図示している本形態例のシザースギヤ10においては、先に図8〜図10で説明したシザースギヤ1の場合と略同様に、メインギヤ2に対しサブギヤ3が所定の回転方向に付勢され且つ相互の歯筋が揃うセット位置から噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけ付勢方向に回転した位置でサブギヤ3の可動範囲が制限されるようになっている。   As shown in FIG. 1, in the scissor gear 10 of the present embodiment shown here, the sub gear 3 rotates at a predetermined rotation with respect to the main gear 2 in the same manner as in the case of the scissor gear 1 described above with reference to FIGS. 8 to 10. The movable range of the sub-gear 3 is limited at a position rotated in the biasing direction by a slightly larger amount of deviation than the backlash with the meshing counterpart gear from the set position where the teeth are biased in the direction and aligned with each other. ing.
より具体的には、先の図8及び図9に示されていた通り(図1に記載のない構成要件について図8及び図9を参照)、メインギヤ2とサブギヤ3との間にC字状のトーションスプリング4を同心状に介装し、該トーションスプリング4の一端をノックピン5を介しメインギヤ2側に固定し且つ他端をノックピン6を介しサブギヤ3側に固定すると共に、メインギヤ2に対するサブギヤ3の相対的な回転位置をトーションスプリング4による所定の付勢力が得られ且つ相互の歯筋が揃うセット位置に固定し得るようメインギヤ2側にノックピン6が嵌まり込む固定穴8を設け、該固定穴8に噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけサブギヤ3のセット位置から付勢方向に向けた回転を許容し得るようガタ9を付してあり、このガタ9付きの固定穴8によりメインギヤ2に対するサブギヤ3の可動範囲が制限される構造としてある。   More specifically, as shown in FIG. 8 and FIG. 9 (refer to FIG. 8 and FIG. 9 for the constituent elements not shown in FIG. 1), a C-shape is formed between the main gear 2 and the sub gear 3. The torsion spring 4 is concentrically disposed, one end of the torsion spring 4 is fixed to the main gear 2 side via the knock pin 5, and the other end is fixed to the sub gear 3 side via the knock pin 6. A fixing hole 8 into which the knock pin 6 is fitted is provided on the side of the main gear 2 so that a predetermined urging force by the torsion spring 4 can be obtained and a relative position of the teeth can be fixed. A backlash 9 is attached to the hole 8 so as to allow rotation of the sub gear 3 from the set position in the urging direction by an amount slightly larger than the backlash with the meshing counterpart gear. The fixing holes 8 with the looseness 9 is a structure in which the movable range of the sub gear 3 relative to the main gear 2 is restricted.
そして、斯かる構造を備えた図1のシザースギヤ10にあっては、噛合相手側ギヤのギヤ歯y(図2参照)をメインギヤ2及びサブギヤ3のギヤ歯2x間及びギヤ歯3x間に挿し入れて噛み合わせる際における挿入方向(矢印Aで示す方向)から見て、先行するサブギヤ3に対し後に続くメインギヤ2が張り出して段差を形成してしまう部位を面取りし、その面取り箇所に前記噛合相手側ギヤのギヤ歯y(図2参照)を前記サブギヤ3のギヤ歯3x間からメインギヤ2のギヤ歯2x間へ案内するガイド面11を形成している。   In the scissor gear 10 of FIG. 1 having such a structure, the gear teeth y (see FIG. 2) of the meshing counterpart gear are inserted between the gear teeth 2x of the main gear 2 and the sub gear 3 and between the gear teeth 3x. As viewed from the insertion direction (direction indicated by arrow A) when meshing with each other, the portion where the main gear 2 continues to protrude from the preceding sub gear 3 to form a step is chamfered, and the meshing counterpart side is formed at the chamfered portion. A guide surface 11 is formed for guiding the gear teeth y (see FIG. 2) of the gear from between the gear teeth 3x of the sub gear 3 to between the gear teeth 2x of the main gear 2.
即ち、このガイド面11は、噛合相手側ギヤの挿入方向(矢印Aで示す方向)に向かうに従い反付勢方向(図2中の右方向)へ斜めに張り出すようになっており、先行するサブギヤ3のギヤ歯3xの一側面(図1中の右側面)と、該ギヤ歯3xの一側面から反付勢方向(図2中の右方向)に張り出したメインギヤ2のギヤ歯2xの一側面(図1中の右側面)との間を段差なく連続させるようにしてある。   That is, the guide surface 11 projects obliquely in the counter-biasing direction (right direction in FIG. 2) as it goes in the insertion direction (direction indicated by arrow A) of the meshing counterpart gear. One side of the gear teeth 3x of the sub gear 3 (right side in FIG. 1) and one of the gear teeth 2x of the main gear 2 projecting from the one side of the gear teeth 3x in the counter-biasing direction (right direction in FIG. 2). It is made to continue without a level | step difference between a side surface (right side surface in FIG. 1).
而して、メインギヤ2に対しサブギヤ3をトーションスプリング4の付勢力が発生する方向に相対的に回転させ、サブギヤ3側に備えられているノックピン6をメインギヤ2側の固定穴8に嵌め込むと、メインギヤ2に対するサブギヤ3の相対的な回転位置が、トーションスプリング4による所定の付勢力が得られ且つ相互の歯筋が揃うセット位置(図5参照)から前記固定穴8のガタ9分だけ前記トーションスプリング4の付勢方向にずれた図1に示す如き位置に決まる。   Thus, when the sub gear 3 is rotated relative to the main gear 2 in the direction in which the urging force of the torsion spring 4 is generated, the knock pin 6 provided on the sub gear 3 side is fitted into the fixing hole 8 on the main gear 2 side. The relative rotational position of the sub gear 3 with respect to the main gear 2 is determined by the amount of play 9 minutes of the fixing hole 8 from the set position (see FIG. 5) where a predetermined urging force is obtained by the torsion spring 4 and the mutual tooth traces are aligned. The position shown in FIG. 1 is shifted in the urging direction of the torsion spring 4.
そして、図2に模式的に示す如く、メインギヤ2及びサブギヤ3のギヤ歯2x間及びギヤ歯3x間に噛合相手側ギヤのギヤ歯yを矢印Aの方向から挿し入れると、噛合相手側ギヤのギヤ歯yがガイド面11によりサブギヤ3のギヤ歯3x間からメインギヤ2のギヤ歯2x間へと円滑に案内され、サブギヤ3のギヤ歯3xを反付勢方向(図2中の右方向)に押し戻しつつ、メインギヤ2のギヤ歯2x間へと噛合相手側ギヤのギヤ歯yが進入していくことになり、該噛合相手側ギヤのギヤ歯yがメインギヤ2及びサブギヤ3の両方に入り込んだ時点では、両者のずれ量がバックラッシ相当分に戻された状態となり、メインギヤ2の歯面とサブギヤ3の歯面とが噛合相手側ギヤの歯面を挟む状態となってバックラッシが打ち消される。   Then, as schematically shown in FIG. 2, when the gear tooth y of the meshing counterpart gear is inserted from the direction of the arrow A between the gear teeth 2x of the main gear 2 and the sub gear 3 and between the gear teeth 3x, the meshing counterpart gear The gear teeth y are smoothly guided by the guide surface 11 from between the gear teeth 3x of the sub gear 3 to between the gear teeth 2x of the main gear 2, and the gear teeth 3x of the sub gear 3 are moved in the counter-biasing direction (right direction in FIG. 2). When the gear tooth y of the meshing counterpart gear enters the gap between the gear teeth 2x of the main gear 2 while pushing back, and the gear tooth y of the meshing counterpart gear enters both the main gear 2 and the sub gear 3 Then, the amount of deviation between the two is returned to the amount corresponding to the backlash, the tooth surface of the main gear 2 and the tooth surface of the sub gear 3 sandwich the tooth surface of the meshing counterpart gear, and the backlash is canceled.
従って、上記形態例によれば、メインギヤ2とサブギヤ3との歯筋を揃えるための手動操作を行わなくても、噛合相手側ギヤのギヤ歯yをメインギヤ2及びサブギヤ3のギヤ歯2x,3x間に挿し入れるだけで簡便に組み付けを行うことができ、シザースギヤ10の組み付け性を従来よりも大幅に向上することができる。   Therefore, according to the above embodiment, the gear teeth y of the meshing counterpart gears can be changed to the gear teeth 2x, 3x of the main gear 2 and the sub gear 3 without performing a manual operation for aligning the tooth traces of the main gear 2 and the sub gear 3. Assembling can be performed simply by inserting them in between, and the assembling property of the scissor gear 10 can be greatly improved as compared with the conventional case.
更に、特に本形態例においては、メインギヤ2に固定穴8を新たに穿設するだけでノックピン6にサブギヤ3をセット位置付近に固定する機能を持たせることができるので、構造の複雑化(部品点数の増加)を招くことなくメインギヤ2に対するサブギヤ3の可動範囲を制限することができる。   Further, particularly in this embodiment, the function of fixing the sub gear 3 to the vicinity of the set position can be provided to the knock pin 6 only by newly drilling the fixing hole 8 in the main gear 2. The movable range of the sub gear 3 relative to the main gear 2 can be limited without incurring an increase in the number of points.
また、以上はサブギヤ3側から噛合相手側ギヤのギヤ歯y(図2参照)を矢印Aの方向に挿し入れる場合で例示しているが、図3に示す如く、これとは逆に、メインギヤ2側から噛合相手側ギヤのギヤ歯y(図2参照)を矢印Bの方向に挿し入れる場合には、その挿入方向(矢印Bで示す方向)から見て、先行するメインギヤ2に対し後に続くサブギヤ3が張り出して段差を形成してしまう部位を面取りし、その面取り箇所に前記噛合相手側ギヤのギヤ歯y(図2参照)を前記メインギヤ2のギヤ歯2x間からサブギヤ3のギヤ歯3x間へ案内するガイド面12を図1と同じように形成すれば良い。   Further, the above is an example in which the gear tooth y (see FIG. 2) of the meshing counterpart gear is inserted from the sub gear 3 side in the direction of the arrow A. However, as shown in FIG. When the gear tooth y (see FIG. 2) of the meshing counterpart gear is inserted in the direction of arrow B from the second side, it follows the preceding main gear 2 when viewed from the insertion direction (the direction indicated by arrow B). A portion where the sub gear 3 protrudes and forms a step is chamfered, and the gear tooth y (see FIG. 2) of the meshing counterpart gear is inserted into the chamfered portion between the gear teeth 2x of the main gear 2 and the gear teeth 3x of the sub gear 3. What is necessary is just to form the guide surface 12 to guide in the same way as FIG.
尚、本発明のシザースギヤは、上述の形態例にのみ限定されるものではなく、メインギヤに対するサブギヤの可動範囲を制限する機構については、必ずしも図示例に限定されるものではなく、フリー状態で噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけサブギヤのセット位置から付勢方向に回転した位置で更なる回動が阻止されるようにした機構であれば、どのような方式を採用したものであっても良いこと、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   The scissor gear of the present invention is not limited only to the above-described embodiment, and the mechanism for limiting the movable range of the sub gear with respect to the main gear is not necessarily limited to the illustrated example, and the mating counterpart in the free state. What type of system is used as long as the mechanism prevents further rotation at a position rotated in the biasing direction from the set position of the sub gear by an amount slightly larger than the backlash with the side gear? Of course, various modifications can be made without departing from the scope of the present invention.
本発明を実施する形態の一例を斜め上方から見た斜視図である。It is the perspective view which looked at an example of the form which carries out the present invention from the slanting upper part. ガイド面により案内される噛合相手側ギヤの動きを説明する模式図である。It is a schematic diagram explaining the movement of the meshing counterpart gear guided by the guide surface. 本発明の別の形態例を斜め上方から見た斜視図である。It is the perspective view which looked at another example of the present invention from the slanting upper part. 従来のシザースギヤの一例を示す断面図である。It is sectional drawing which shows an example of the conventional scissor gear. 図4をV−V方向から見た矢視図である。It is the arrow line view which looked at FIG. 4 from the VV direction. 図4のシザースギヤの要部を斜め上方から見た斜視図である。It is the perspective view which looked at the principal part of the scissor gear of FIG. 4 from diagonally upward. 固定ボルトによる仮固定の状態を示す斜視図である。It is a perspective view which shows the state of temporary fixing with a fixing bolt. サブギヤの可動範囲を制限する機構の一例を示す断面図である。It is sectional drawing which shows an example of the mechanism which restrict | limits the movable range of a subgear. 図8のIX−IX方向から見た矢視図である。It is the arrow view seen from the IX-IX direction of FIG. 図8のシザースギヤの要部を斜め上方から見た斜視図である。It is the perspective view which looked at the principal part of the scissor gear of FIG. 8 from diagonally upward.
符号の説明Explanation of symbols
2 メインギヤ
2x ギヤ歯
3 サブギヤ
3x ギヤ歯
4 トーションスプリング
5 ノックピン(第一のノックピン)
6 ノックピン(第二のノックピン)
8 固定穴
9 ガタ
10 シザースギヤ
11 ガイド面
12 ガイド面
y 噛合相手側ギヤのギヤ歯
2 main gear 2x gear teeth 3 sub gear 3x gear teeth 4 torsion spring 5 knock pin (first knock pin)
6 knock pin (second knock pin)
8 Fixing hole 9 Backlash 10 Scissor gear 11 Guide surface 12 Guide surface y Gear teeth of meshing counterpart gear

Claims (2)

  1. メインギヤに対しサブギヤが所定の回転方向に付勢され且つ相互の歯筋が揃うセット位置から噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけ付勢方向に回転した位置でサブギヤの可動範囲が制限されるようにしたシザースギヤであって、噛合相手側ギヤのギヤ歯をメインギヤ及びサブギヤのギヤ歯間に挿し入れて噛み合わせる際の挿入方向から見て、メインギヤ及びサブギヤのうちの先行する一方に対し後に続く他方が張り出して段差を形成してしまう部位を面取りし、その面取り箇所に前記噛合相手側ギヤのギヤ歯を前記メインギヤ及びサブギヤのうちの先行する一方のギヤ歯間から後に続く他方のギヤ歯間へ案内するガイド面を形成したことを特徴とするシザースギヤ。   The movable range of the sub gear at a position where the sub gear is biased in the predetermined rotational direction with respect to the main gear and rotated in the biasing direction by an amount slightly larger than the backlash with the meshing counterpart gear from the set position where the mutual tooth traces are aligned. The scissor gear is configured so that the gear teeth of the meshing counterpart gear are inserted between the gear teeth of the main gear and the sub gear, and viewed from the insertion direction when meshing, the preceding one of the main gear and the sub gear And chamfering the part where the other side that protrudes from the other side protrudes to form a step, and the other side that follows the gear tooth of the meshing counterpart gear at the chamfered part from between the preceding one gear tooth of the main gear and the sub gear. A scissor gear characterized in that a guide surface for guiding between the gear teeth is formed.
  2. メインギヤとサブギヤとの間にC字状のトーションスプリングを同心状に介装し、該トーションスプリングの一端を第一のノックピンを介しメインギヤ側に固定し且つ他端を第二のノックピンを介しサブギヤ側に固定すると共に、メインギヤに対するサブギヤの相対的な回転位置をトーションスプリングによる所定の付勢力が得られ且つ相互の歯筋が揃うセット位置に固定し得るようメインギヤ側に第二のノックピンが嵌まり込む固定穴を設け、該固定穴に噛合相手側ギヤとのバックラッシより僅かに大きなずれ量分だけサブギヤのセット位置から付勢方向に向けた回転を許容し得るようガタを付したことを特徴とする請求項1に記載のシザースギヤ。   A C-shaped torsion spring is concentrically interposed between the main gear and the sub gear, one end of the torsion spring is fixed to the main gear side via the first knock pin, and the other end is fixed to the sub gear side via the second knock pin. And a second knock pin is fitted on the main gear side so that the relative rotational position of the sub gear with respect to the main gear can be fixed at a set position where a predetermined urging force is obtained by a torsion spring and the mutual tooth traces are aligned. A fixing hole is provided, and a backlash is provided in the fixing hole so as to allow the rotation from the set position of the sub gear toward the urging direction by an amount slightly larger than the backlash with the meshing counterpart gear. The scissor gear according to claim 1.
JP2008309642A 2008-12-04 2008-12-04 Scissor gear Active JP5284065B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012025210A1 (en) * 2012-12-28 2014-07-03 Gkn Sinter Metals Holding Gmbh Divided gear
US20160230872A1 (en) * 2013-08-15 2016-08-11 Cummins Inc. Scissors gear
CN106763655A (en) * 2016-11-27 2017-05-31 苏州君丰辰电子科技有限公司 Linkage gear component

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106717660A (en) * 2016-11-27 2017-05-31 苏州君丰辰电子科技有限公司 A kind of preferable linkage gear component of sealing

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Publication number Priority date Publication date Assignee Title
JPH0277352U (en) * 1988-12-02 1990-06-13
JP2007529703A (en) * 2004-03-22 2007-10-25 ミバ・ジンテル・オーストリア・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Gear for gear stage without play
JP2007283892A (en) * 2006-04-17 2007-11-01 Mitsubishi Electric Corp Electric power steering device, and motor for electric power steering device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0277352U (en) * 1988-12-02 1990-06-13
JP2007529703A (en) * 2004-03-22 2007-10-25 ミバ・ジンテル・オーストリア・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Gear for gear stage without play
JP2007283892A (en) * 2006-04-17 2007-11-01 Mitsubishi Electric Corp Electric power steering device, and motor for electric power steering device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012025210A1 (en) * 2012-12-28 2014-07-03 Gkn Sinter Metals Holding Gmbh Divided gear
DE102012025210B4 (en) * 2012-12-28 2014-08-14 Gkn Sinter Metals Holding Gmbh Divided gear
US20160230872A1 (en) * 2013-08-15 2016-08-11 Cummins Inc. Scissors gear
US10738872B2 (en) * 2013-08-15 2020-08-11 Cummins Inc. Scissors gear
CN106763655A (en) * 2016-11-27 2017-05-31 苏州君丰辰电子科技有限公司 Linkage gear component

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