JP2005207454A - Laminated gear - Google Patents

Laminated gear Download PDF

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Publication number
JP2005207454A
JP2005207454A JP2004012327A JP2004012327A JP2005207454A JP 2005207454 A JP2005207454 A JP 2005207454A JP 2004012327 A JP2004012327 A JP 2004012327A JP 2004012327 A JP2004012327 A JP 2004012327A JP 2005207454 A JP2005207454 A JP 2005207454A
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gear
tooth
laminated
plates
oil
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Toshiaki Asada
俊昭 浅田
Kazuto Sakai
和人 酒井
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2004012327A priority Critical patent/JP2005207454A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • F16H57/0431—Means for guiding lubricant directly onto a tooth surface or to foot areas of a gear, e.g. by holes or grooves in a tooth flank

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated gear which can furthermore easily provide oil grooves for holding lubricating oil than before. <P>SOLUTION: The gear 7 has a plurality of coaxially laminated gear plates 10A, 10B, and the respective gear plates 10A, 10B are provided with teeth portions 12A, 12B. At least a part of the teeth portion 12B of at least one of the gear plates 10B arranged inside the gear plates arranged at both ends in the laminated direction of the gear plates 10A, 10B is formed so as to be smaller than that of the teeth portion 12A of the neighboring another gear plate 10A in at least one of the directions of the tooth thickness or the tooth depth. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は複数のギア構成部品を積層して構成される積層ギアに関する。   The present invention relates to a laminated gear constituted by laminating a plurality of gear components.

歯面に切削加工で油溝を形成し、その油溝に潤滑油を供給して歯面の摩耗を抑えるようにしたギアが知られている（特許文献１参照）。また、水平に配置されるギアの上面に油溜りを形成し、その油溜りから外周の歯底に向けて油路を設けた例も知られている（特許文献２参照）。その他に、本発明に関連する先行技術文献として特許文献３が存在する。
特開２００３−２０７０３１号公報 実開平１−８２３６６号公報 特開平８−７４９４３号公報 There is known a gear in which an oil groove is formed on a tooth surface by cutting and lubricating oil is supplied to the oil groove to suppress wear of the tooth surface (see Patent Document 1). There is also known an example in which an oil reservoir is formed on the upper surface of a horizontally disposed gear, and an oil passage is provided from the oil reservoir toward an outer tooth bottom (see Patent Document 2). In addition, there is Patent Document 3 as a prior art document related to the present invention.
JP 2003-207031 A Japanese Utility Model Publication No. 1-82366 Japanese Patent Laid-Open No. 8-74943

しかしながら、特許文献１のギアのように、歯車の一つ一つの歯面に切削加工で油溝を形成するには相当の手間を要する。また、特許文献２のギアのように油溜りから歯底まで油通路を設ける場合には小径でかつ長い深穴加工が必要となり、加工に手間がかかる。   However, as in the gear of Patent Document 1, considerable effort is required to form the oil groove on each tooth surface of the gear by cutting. Further, when the oil passage is provided from the oil reservoir to the tooth bottom as in the gear of Patent Document 2, it is necessary to process a deep hole with a small diameter and a long time.

そこで、本発明は積層ギアの一部のギアを潤滑の為のギア構造とすることにより油溝や油路を従来よりも簡単に設けることが可能な積層ギアを提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated gear in which oil grooves and oil passages can be provided more easily than in the past by providing a gear structure for lubrication as a part of the laminated gear.

本発明の第１の積層ギアは、複数のギア構成部品が同軸的に積層され、各ギア構成部品には歯部が設けられた積層ギアであって、前記ギア構成部品の積層方向に関して両端に配置されるギア構成部品よりも当該積層方向の内側に配置される少なくとも一つのギア構成部品の歯部の少なくとも一部が、隣接する他のギア構成部品の歯部よりも歯厚方向又は歯高方向の少なくともいずれか一方向に関して小さく形成されることにより、上述した課題を解決する（請求項１）。   A first laminated gear of the present invention is a laminated gear in which a plurality of gear components are coaxially laminated, and each gear component is provided with a tooth portion, and is provided at both ends with respect to the lamination direction of the gear components. At least a part of the tooth portion of at least one gear component arranged inside the stacking direction with respect to the gear component to be arranged has a tooth thickness direction or tooth height higher than the tooth portion of another adjacent gear component. The above-described problem is solved by being formed small in at least one of the directions (Claim 1).

この発明によれば、一部のギア構成部品の歯部の少なくとも一部をその他のギア構成部品の歯部よりも小さく形成したので、これらを組み合わせて得られる積層ギアの歯面又は歯先に段差が生じ、その段差を油溝として機能させることができる。一部のギア構成部品の歯部を小さく形成するだけで油溝を設けることができ、ギア構成部品を組み合わせて積層ギアを構成した後に一つ一つの歯面に油溝を加工するような手間を要しない。   According to the present invention, since at least a part of the teeth of some gear components is formed smaller than the teeth of other gear components, the tooth surface or the tooth tip of the laminated gear obtained by combining them. A level | step difference arises and the level | step difference can be functioned as an oil groove. An oil groove can be provided simply by forming the tooth part of some gear components small, and it takes time and effort to process the oil groove on each tooth surface after combining the gear components to form a laminated gear. Is not required.

本発明の第２の積層ギアは、複数のギア構成部品が同軸的に積層され、外部から潤滑油が供給される供給部が設けられるとともに各ギア構成部品には歯部が設けられた積層ギアであって、前記ギア構成部品の積層方向に関して両端に配置されるギア構成部品よりも当該積層方向の内側に配置される少なくとも一つのギア構成部品には、前記供給部から当該ギア構成部品の歯部へ潤滑油を導出する導出用溝部が設けられ、前記導出用溝部が隣接するギア構成部品にて覆われることにより前記供給部から前記歯部まで延びる導出用油路が形成されることにより、上述した課題を解決する（請求項２）。   The second laminated gear of the present invention is a laminated gear in which a plurality of gear components are coaxially laminated, a supply portion to which lubricating oil is supplied from the outside is provided, and each gear component is provided with a tooth portion. The at least one gear component disposed inside the stacking direction relative to the gear component disposed at both ends with respect to the stacking direction of the gear component is connected to the teeth of the gear component from the supply unit. A lead-out groove for leading the lubricating oil to the part is provided, and a lead-out oil passage extending from the supply part to the tooth part is formed by covering the lead-out groove with an adjacent gear component; The problem described above is solved (claim 2).

この発明によれば、一部のギア構成部品に設けられた溝部をこれに隣接して配置される他のギア構成部品にて覆うことにより、その溝部を潤滑油の供給部から歯部へ通じる油溝として機能させることができる。この場合も、組み合わせ前の一部のギア構成部品に溝部を設けておけばよく、ギア構成部品の組み合わせ後に深穴加工のような手間のかかる追加工を要しない。   According to the present invention, the groove portion provided in a part of the gear component parts is covered with the other gear component parts arranged adjacent thereto, so that the groove portion is communicated from the lubricating oil supply part to the tooth part. It can function as an oil groove. Also in this case, it is only necessary to provide a groove in some of the gear components before the combination, and no additional work such as deep hole machining is required after the combination of the gear components.

本発明の第２の積層ギアにおいても、前記積層方向の内側に配置される少なくとも一つのギア構成部品の歯部の少なくとも一部が、隣接する他のギア構成部品の歯部よりも歯厚方向又は歯高方向の少なくともいずれか一方向に関して小さく形成されてもよい。この場合には導出用溝部から排出される潤滑油を歯面又は歯先の油溝に無理なく導くことができ、潤滑性能がさらに向上する。   Also in the second laminated gear of the present invention, at least a part of the teeth of at least one gear component arranged inside the lamination direction is in the tooth thickness direction than the teeth of other adjacent gear components. Or you may form small regarding at least any one direction of a tooth height direction. In this case, the lubricating oil discharged from the lead-out groove portion can be easily guided to the tooth surface or the oil groove on the tooth tip, and the lubricating performance is further improved.

また、本発明の第２の積層ギアにおいては、外部から前記供給部を経て前記導出用溝部に至るまでの潤滑油の油路が複数のギア構成部品の組み合わせによって形成されてもよい（請求項３）。このように複数のギア構成部品を組み合わせて油路を形成すれば、深穴加工では実現不可能な様々な形状の油路を簡単に形成することができる。   Further, in the second laminated gear of the present invention, the lubricating oil passage from the outside through the supply section to the lead-out groove section may be formed by a combination of a plurality of gear components. 3). Thus, if an oil path is formed by combining a plurality of gear components, oil paths having various shapes that cannot be realized by deep hole machining can be easily formed.

本発明においてギア構成部品は様々な材料及び加工法にて製造することができるが、好適には前記ギア構成部品をプレス成型にて形成するとよい（請求項４）。プレス成型により同一形状のギア構成部品を安価に製造することができ、複数のギア構成部品の積層構造としたことにより見かけ上は部品点数が増加しても、一つ一つのギア構成部品を極めて安価に製造して積層ギア全体ではコストダウンを図ることができる。   In the present invention, the gear component can be manufactured by various materials and processing methods. Preferably, the gear component is formed by press molding. The gear components of the same shape can be manufactured at low cost by press molding. Even if the number of components increases due to the laminated structure of multiple gear components, each gear component is extremely It can be manufactured at low cost and the entire laminated gear can be reduced in cost.

以上に説明したように、本発明によればギア構成部品を組み合わせて積層ギアを構成した後に、各歯面への油溝の追加工や積層ギア内部への深穴加工を行う必要がなく、油溝や油路を簡単に設けることができるという優れた効果を奏する。   As described above, according to the present invention, after configuring a laminated gear by combining gear components, there is no need to perform additional processing of oil grooves on each tooth surface or deep hole processing inside the laminated gear, There is an excellent effect that an oil groove and an oil passage can be easily provided.

図１は本発明の一形態に係る積層ギアが使用された内燃機関用始動装置の一例を示している。始動装置１は、不図示のスタータモータの出力軸と連結されるスタータギア軸２の回転を、そのスタータギア軸２上に設けられたスタータギア３からこれと噛み合うドリブンギア４へ伝達し、そのドリブンギア４の回転をワンウェイクラッチ５を介してドリブンギア４と同軸の中間ギア６へ伝達し、その中間ギア６の回転をこれと噛み合うクランクギア７に伝達してクランクギア７と同軸のクランクシャフト８をクランク軸線ＣＬの回りに所定方向に回転させるように構成されている。ワンウェイクラッチ５はドリブンギア４から中間ギア６への回転伝達を許容し、その反対に中間ギア６からドリブンギア４への回転伝達を阻止するもので、内燃機関の始動後にクランクシャフト８によってスタータモータが回転駆動されることによる回転負荷の増加を防止する目的で設けられている。噛み合い率の向上によるギア騒音の低減化等を目的として、各ギア３、４、６、７はいずれも歯筋が軸線方向に対して斜めに傾斜したはすば歯車として構成されている。   FIG. 1 shows an example of a starter for an internal combustion engine in which a laminated gear according to an embodiment of the present invention is used. The starter 1 transmits the rotation of the starter gear shaft 2 connected to the output shaft of the starter motor (not shown) from the starter gear 3 provided on the starter gear shaft 2 to the driven gear 4 meshed therewith, The rotation of the driven gear 4 is transmitted to the intermediate gear 6 coaxial with the driven gear 4 via the one-way clutch 5, and the rotation of the intermediate gear 6 is transmitted to the crank gear 7 meshing with the intermediate gear 6, and the crankshaft coaxial with the crank gear 7. 8 is configured to rotate around the crank axis CL in a predetermined direction. The one-way clutch 5 allows rotation transmission from the driven gear 4 to the intermediate gear 6 and, on the contrary, prevents rotation transmission from the intermediate gear 6 to the driven gear 4. The starter motor is driven by the crankshaft 8 after the internal combustion engine is started. Is provided for the purpose of preventing an increase in rotational load due to rotational driving. For the purpose of reducing gear noise by improving the meshing rate, the gears 3, 4, 6, and 7 are all configured as helical gears whose tooth traces are inclined with respect to the axial direction.

以上のような始動装置１において、例えばクランクギア７が本発明の積層ギアに相当する。以下、クランクギア７の詳細を説明する。図２（ａ）、（ｂ）はそれぞれクランクギア７を構成する２種類のギアプレート１０Ａ、１０Ｂを示している。ギアプレート１０Ａ、１０Ｂはいずれも鋼板のプレス打ち抜き加工によって形成されている。ギアプレート１０Ａ、１０Ｂの厚さはクランクギア７の歯幅（クランク軸線ＣＬの方向に関する寸法に相当）よりも十分に小さく、最低でも３枚のギアプレート１０Ａ、１０Ｂを重ねることによってクランクギア７が構成されるように各プレート１０Ａ、１０Ｂの厚さが定められる。なお、ギアプレート１０Ａ、１０Ｂの厚さは互いに等しくてもよいし、異なってもよい。   In the starting device 1 as described above, for example, the crank gear 7 corresponds to the laminated gear of the present invention. Hereinafter, details of the crank gear 7 will be described. 2A and 2B show two types of gear plates 10A and 10B constituting the crank gear 7, respectively. Each of the gear plates 10A and 10B is formed by press punching of a steel plate. The thickness of the gear plates 10A and 10B is sufficiently smaller than the tooth width of the crank gear 7 (corresponding to the dimension in the direction of the crank axis CL), and at least three gear plates 10A and 10B are overlapped to allow the crank gear 7 to overlap. The thickness of each plate 10A, 10B is determined to be configured. The gear plates 10A and 10B may have the same thickness or different thicknesses.

ギアプレート１０Ａ、１０Ｂに共通する特徴として、中心にはクランクシャフト８が嵌り込む中心孔１１が形成され、外周には歯部１２Ａ、１２Ｂがそれぞれ形成されている。また、各プレート１０Ａ、１０Ｂの中心部には４つの貫通孔１３が周方向に等しいピッチ（９０°）で形成されている。一方、図２（ａ）に示す第１のギアプレート１０Ａには中心孔１１から貫通孔１３に通じる導入用溝部１４が形成されている。一方、図２（ｂ）に示す第２のギアプレート１０Ｂには、上述した導入用溝部１４に代えて、いずれか一つの貫通孔１３から歯部１２Ｂの歯底１２ｂｔに通じる導出用溝部１５が形成されている。これらの溝部１４、１５はギアプレート１０Ａ、１０Ｂの両面に開口するスリット状に形成されている。但し、ギアプレート１０Ａ、１０Ｂが十分な板厚を有している場合には溝部１４、１５をギアプレート１０Ａ、１０Ｂの片面のみに開口させてもよい。   As a feature common to the gear plates 10A and 10B, a center hole 11 into which the crankshaft 8 is fitted is formed at the center, and tooth portions 12A and 12B are formed on the outer periphery. In addition, four through holes 13 are formed at the same pitch in the circumferential direction (90 °) at the center of each plate 10A, 10B. On the other hand, the first gear plate 10 </ b> A shown in FIG. 2A is formed with an introduction groove 14 that leads from the center hole 11 to the through hole 13. On the other hand, in the second gear plate 10B shown in FIG. 2B, in place of the introduction groove 14 described above, a lead-out groove 15 leading from any one of the through holes 13 to the tooth bottom 12bt of the tooth 12B is provided. Is formed. These groove portions 14 and 15 are formed in a slit shape that opens on both surfaces of the gear plates 10A and 10B. However, when the gear plates 10A and 10B have a sufficient thickness, the grooves 14 and 15 may be opened only on one side of the gear plates 10A and 10B.

なお、ギアプレート１０Ａ、１０Ｂの中心孔１１、歯部１２Ａ、１２Ｂ、貫通孔１３、溝部１４、１５はいずれもギアプレート１０Ａ、１０Ｂの素材を打ち抜く際に一体的にプレス成型加工される。   Note that the center hole 11, the tooth portions 12A and 12B, the through holes 13, and the groove portions 14 and 15 of the gear plates 10A and 10B are all press-molded integrally when the material of the gear plates 10A and 10B is punched.

以上のギアプレート１０Ａ、１０Ｂにおいて、中心孔１１の直径は互いに等しく、その大きさはクランクシャフト８のギア受け部８ａ（図１参照）の外周に所定の嵌め合い公差で取り付けられるように設定されている。また、ギアプレート１０Ａ、１０Ｂの中心から貫通孔１３までの半径方向の距離も互いに等しい。貫通孔１３と歯部１２Ａ、１２Ｂの周方向の位置関係もギアプレート１０Ａ、１０Ｂの間で互いに等しく設定されている。   In the gear plates 10A and 10B described above, the diameters of the center holes 11 are equal to each other, and the sizes thereof are set so as to be attached to the outer periphery of the gear receiving portion 8a (see FIG. 1) of the crankshaft 8 with a predetermined fitting tolerance. ing. The radial distances from the centers of the gear plates 10A and 10B to the through holes 13 are also equal to each other. The positional relationship in the circumferential direction between the through hole 13 and the tooth portions 12A and 12B is also set equal between the gear plates 10A and 10B.

一方、歯部１２Ａ、１２Ｂの大きさは第１のギアプレート１０Ａと第２のギアプレート１０Ｂとで互いに異なっている。すなわち、第１のギアプレート１０Ａの歯部１２Ａは、中間ギア６と適正に噛み合うためにクランクギア７に設計上要求される歯部の軸直角断面と合同となるようにその大きさが設定されている。一方、第２のギアプレート１０Ｂの歯部１２Ｂは第１のギアプレート１０Ａの歯部１２Ａの大きさよりも歯厚方向及び歯高方向のいずれにおいても小さく形成されている。なお、歯厚方向はギアプレート１０Ａ、１０Ｂの周方向に相当し、歯高方向はギアプレート１０Ａ、１０Ｂの半径方向に相当する。第２のギアプレート１０Ｂの歯部１２Ｂの歯厚及び歯高は、第１のギアプレート１０Ａの歯部１２Ａに対して潤滑油の保持に必要な程度の溝部がクランクギア７の歯面や歯先に生じるように定めればよい。   On the other hand, the sizes of the tooth portions 12A and 12B are different between the first gear plate 10A and the second gear plate 10B. That is, the size of the tooth portion 12A of the first gear plate 10A is set so as to be congruent with the axially perpendicular section of the tooth portion required in the design of the crank gear 7 in order to properly mesh with the intermediate gear 6. ing. On the other hand, the tooth portion 12B of the second gear plate 10B is formed smaller in both the tooth thickness direction and the tooth height direction than the size of the tooth portion 12A of the first gear plate 10A. The tooth thickness direction corresponds to the circumferential direction of the gear plates 10A and 10B, and the tooth height direction corresponds to the radial direction of the gear plates 10A and 10B. The tooth thickness and the tooth height of the tooth portion 12B of the second gear plate 10B are such that the groove portions of the tooth portion 12A of the first gear plate 10A are required to hold the lubricating oil so that the tooth surfaces and teeth of the crank gear 7 It may be determined to occur first.

以上のギアプレート１０Ａ、１０Ｂを適宜の枚数ずつクランク軸線ＣＬの方向に積層することによりクランクギア７が構成される。その組み合わせの一例を図３に示す。この例では、クランクギア７の両端に第１のギアプレート１０Ａが配置され、それらの間には第２のギアプレート１０Ｂと第１のギアプレート１０Ａとが交互に配置されている。これらのギアプレート１０Ａ、１０Ｂは、それぞれの歯部１２Ａ、１２Ｂが図中に二点鎖線ＴＬで示す歯筋方向に並ぶように、かつ貫通孔１３が歯筋方向に連続するように周方向に位置決めされつつクランク軸線ＣＬの方向に同軸的に組み合わされる。なお、複数枚の第２のギアプレート１０Ｂを使用する場合、第２のギアプレート１０Ｂ同士の間において導出用溝部１５の周方向の位置を９０°又はそれ以上の角度でずらしておくことが望ましい。クランクギア７をはすば歯車とせず、平歯車として構成するならば歯部１２Ａ、１２Ｂ及び貫通孔１３をクランク軸線ＣＬの方向に揃えてギアプレート１０Ａ、１０Ｂを組み合わせればよい。   A crank gear 7 is configured by laminating an appropriate number of the above gear plates 10A and 10B in the direction of the crank axis CL. An example of the combination is shown in FIG. In this example, the first gear plate 10A is arranged at both ends of the crank gear 7, and the second gear plate 10B and the first gear plate 10A are alternately arranged between them. The gear plates 10A and 10B are arranged in the circumferential direction so that the respective tooth portions 12A and 12B are aligned in the tooth trace direction indicated by a two-dot chain line TL in the drawing and the through hole 13 is continuous in the tooth trace direction. It is coaxially combined in the direction of the crank axis CL while being positioned. When a plurality of second gear plates 10B are used, it is desirable that the circumferential position of the lead-out groove portion 15 is shifted by 90 ° or more between the second gear plates 10B. . If the crank gear 7 is not a helical gear but is configured as a spur gear, the gear plates 10A and 10B may be combined with the tooth portions 12A and 12B and the through hole 13 aligned in the direction of the crank axis CL.

以上のようにギアプレート１０Ａ、１０Ｂを組み合わせることにより、クランクギア７の歯面７ａ及び歯先７ｂのそれぞれには第２のギアプレート１０Ｂに対応して油溝２０が形成される。また、図４に示すように、クランクギア７の内部では貫通孔１３が連続して潤滑油の供給部２１が形成される。なお、図４では供給部２１がクランク軸線ＣＬの方向に延びているが、実際には歯筋方向に供給部２１が延びるようになる。供給部２１の両端は適当な埋栓１６にて閉鎖される。   By combining the gear plates 10A and 10B as described above, the oil grooves 20 are formed on the tooth surfaces 7a and the tooth tips 7b of the crank gear 7 corresponding to the second gear plate 10B. Further, as shown in FIG. 4, the through hole 13 is continuous inside the crank gear 7 to form a lubricating oil supply portion 21. In FIG. 4, the supply unit 21 extends in the direction of the crank axis CL, but actually the supply unit 21 extends in the tooth trace direction. Both ends of the supply unit 21 are closed with appropriate plugs 16.

また、導入用溝部１４及び導出用溝部１５が隣接するギアプレート１０Ｂ又は１０Ａにて覆われることにより、クランクギア７の内部にはクランクギア７の内周から供給部２１に通じる導入用油路２２と、供給部２１からクランクギア７の歯底７ｃに通じる導出用油路２３とが形成される。   Further, the introduction groove portion 14 and the lead-out groove portion 15 are covered with the adjacent gear plate 10B or 10A, so that the introduction oil passage 22 leading from the inner periphery of the crank gear 7 to the supply portion 21 is provided inside the crank gear 7. And a lead-out oil passage 23 that leads from the supply portion 21 to the tooth bottom 7c of the crank gear 7 is formed.

クランクギア７が取り付けられるクランクシャフト８の内部には潤滑油を供給する油穴２４が形成されており、その油穴２４はギア受け部８ａの外周に設けられた環状の油溝２５に開口する。従って、クランクギア７のいずれか一つの導入用油路２２を油溝２５と合わせることにより、クランクシャフト８の油穴２４から導かれる潤滑油を導入用油路２２を介して供給部２１に供給し、さらにその供給部２１から導出用油路２３を介して歯底７ｃに潤滑油を導きことができる。そして、歯底７ｃに排出された潤滑油が油溝２０に保持されることにより、クランクギア７と中間ギア６との噛み合い部分には十分な潤滑油が確実に供給される。   An oil hole 24 for supplying lubricating oil is formed in the crankshaft 8 to which the crank gear 7 is attached, and the oil hole 24 opens into an annular oil groove 25 provided on the outer periphery of the gear receiving portion 8a. . Accordingly, the lubricating oil guided from the oil hole 24 of the crankshaft 8 is supplied to the supply unit 21 via the introduction oil passage 22 by aligning any one of the introduction oil passages 22 of the crank gear 7 with the oil groove 25. Furthermore, the lubricating oil can be guided from the supply portion 21 to the tooth bottom 7c through the oil passage 23 for extraction. The lubricating oil discharged to the tooth bottom 7c is held in the oil groove 20, so that sufficient lubricating oil is reliably supplied to the meshing portion between the crank gear 7 and the intermediate gear 6.

以上のクランクギア７において、組み合わせられたギアプレート１０Ａ、１０Ｂは、その後にばらけることなくクランクギア７の形態を保てるよう適当な結合手段により相互に結合されてもよい。結合手段としてはリベットやボルト等の連結具、接着剤を用いることができる。ギアプレート１０Ａ、１０Ｂを相互にかしめて結合してもよい。あるいは、そのような結合手段を用いなくても、クランクシャフト８にクランクギア７を組み付けた状態においてギアプレート１０Ａ、１０Ｂをクランク軸線ＣＬの方向に強固に締め込むことにより、ギアプレート１０Ａ、１０Ｂの間に十分な摩擦力を生じさせてギアプレート１０Ａ、１０Ｂの周方向のずれを防ぐようにしてもよい。ギアプレート１０Ａ、１０Ｂを固定する各種の手段はクランクギア７の負荷や組み立ての都合等に応じて適宜に選択することができる。   In the above crank gear 7, the combined gear plates 10 </ b> A and 10 </ b> B may be coupled to each other by appropriate coupling means so that the form of the crank gear 7 can be maintained without being separated thereafter. As the coupling means, a connecting tool such as a rivet or a bolt, or an adhesive can be used. The gear plates 10A and 10B may be joined by caulking. Alternatively, without using such a coupling means, the gear plates 10A and 10B can be secured by tightening the gear plates 10A and 10B in the direction of the crank axis CL while the crank gear 7 is assembled to the crankshaft 8. A sufficient frictional force may be generated between the gear plates 10A and 10B to prevent the circumferential displacement of the gear plates 10A and 10B. Various means for fixing the gear plates 10 </ b> A and 10 </ b> B can be appropriately selected according to the load of the crank gear 7 and the convenience of assembly.

また、クランクギア７を積層ギアとして構成した場合にはクランクギア７とクランクシャフト８との間に回り止め手段を設けて両者を一体回転できるように組み合わせる必要がある。回り止め手段としては好適にはキーを用いることができるが、この場合にはクランクギア７を構成するギアプレート１０Ａ、１０Ｂの中心孔１１にキー溝を加工する必要がある。キー溝の加工はギアプレート１０Ａ、１０Ｂの組み合わせ前の個々のギアプレート１０Ａ、１０Ｂに対して行ってもよいし、組み合わせ後のギアプレート１０Ａ、１０Ｂに対して一括して行ってもよい。   Further, when the crank gear 7 is configured as a laminated gear, it is necessary to provide a detent means between the crank gear 7 and the crankshaft 8 so that both can be rotated together. A key can be preferably used as the detent means, but in this case, it is necessary to process a key groove in the center hole 11 of the gear plates 10A and 10B constituting the crank gear 7. The keyway processing may be performed on the individual gear plates 10A and 10B before the combination of the gear plates 10A and 10B, or may be performed on the gear plates 10A and 10B after the combination.

ギアプレート１０Ａ、１０Ｂを組み合わせる前にキー溝を加工する場合には、歯筋の捩れを生じさせるべくキー溝と歯部１２Ａ、１２Ｂとの周方向の位置関係を、ギアプレート１０Ａ、１０Ｂの組み立て順序に従って各プレート１０Ａ、１０Ｂの板厚と歯筋の捩れ角から定まる所定量ずつずらしておく必要がある。この場合にはギアプレート１０Ａ、１０Ｂの組み立て順序もキー溝加工時に考慮した順序に従う必要がある。一方、組み合わせ後のギアプレート１０Ａ、１０Ｂに一括してキー溝を加工する場合には、ギアプレート１０Ａ、１０Ｂが相互にずれないように配慮しておけば、歯筋の方向に対して捩れ角相当だけずれた方向に確実にキー溝を加工できて便利である。その他に、回り止め手段としては例えばクランクシャフト８にフランジを設け、そのフランジとクランクギア７とをボルト等の連結手段にて連結するような構造でもよい。   When the key groove is processed before the gear plates 10A and 10B are combined, the positional relationship in the circumferential direction between the key groove and the tooth portions 12A and 12B is determined to assemble the gear plates 10A and 10B. In accordance with the order, it is necessary to shift the plates 10A and 10B by a predetermined amount determined from the plate thickness and the twist angle of the tooth trace. In this case, the assembly order of the gear plates 10A and 10B needs to follow the order considered at the time of keyway processing. On the other hand, when the key grooves are processed collectively on the combined gear plates 10A and 10B, the twist angle with respect to the direction of the tooth traces should be considered so that the gear plates 10A and 10B do not deviate from each other. It is convenient because the keyway can be surely machined in the direction shifted considerably. In addition, as the rotation preventing means, for example, a structure may be employed in which a flange is provided on the crankshaft 8 and the flange and the crank gear 7 are connected by a connecting means such as a bolt.

上記の形態では、ギアプレート１０Ａ、１０Ｂの素材をクランク軸線ＣＬの方向に打ち抜いて歯部１２Ａ、１２Ｂを成型しているため、図３から明らかなようにクランクギア７の歯面７ａにはギアプレート１０Ａ、１０Ｂの境界において微小な段差が生じる。歯筋の捩れ角が小さく、あるいはギアプレート１０Ａ、１０Ｂの板厚が十分に小さければその段差は無視してよい。但し、そのような段差がクランクギア７の性能に何らかの影響を与える場合には、ギアプレート１０Ａ、１０Ｂを組み合わせた後に歯面７ａに対して研削等による仕上げ加工を施してもよい。   In the above embodiment, the gear plates 10A and 10B are punched in the direction of the crank axis CL so that the tooth portions 12A and 12B are molded. Therefore, as is apparent from FIG. A minute step occurs at the boundary between the plates 10A and 10B. If the torsion angle of the tooth trace is small or the plate thickness of the gear plates 10A and 10B is sufficiently small, the step may be ignored. However, when such a step has some influence on the performance of the crank gear 7, the tooth surface 7a may be finished by grinding or the like after the gear plates 10A and 10B are combined.

本発明は上述した形態に限定されることなく、種々の形態にて実施してよい。例えば、ギアプレート１０Ａ、１０Ｂは交互に配置する必然性はなく、図５に一例を示したように同一のギアプレート１０Ａ又は１０Ｂが二枚以上連続して配置されてもよい。本発明の積層ギアにおいては、歯部が小さく形成された少なくとも一枚のギア構成部品が通常の歯部を有するギア構成部品によって両側から挟まれている部分が存在すればよい。従って、図６に示したように一枚のギアプレート１０Ｂを二枚のギアプレート１０Ａにて挟んだ構成も本発明の範囲に含まれるものである。なお、図６の例では積層ギアの両端に必然的に歯部の大きなギア構成部品が配置されることになるが、歯部の小さなギア構成部品を少なくとも２枚以上使用する場合においては、歯部の小さい少なくとも一枚のギア構成部品が通常のギア構成部品にて挟まれた部分が存在する限りにおいて、積層ギアの少なくともいずれか一方の端に歯部の小さなギア構成部品が配置されていても構わない。また、供給部２１を形成するための貫通孔１３や導入用溝部１４、導出用溝部１５は図示した形態に限らず、例えば図７（ａ）、（ｂ）に示したように、歯部１２Ａ、１２Ｂ毎に設けてもよい。   The present invention is not limited to the form described above, and may be implemented in various forms. For example, the gear plates 10A and 10B are not necessarily arranged alternately, and two or more identical gear plates 10A or 10B may be continuously arranged as shown in FIG. In the laminated gear according to the present invention, it is only necessary that at least one gear component having a small tooth portion is sandwiched from both sides by a gear component having a normal tooth portion. Therefore, a configuration in which one gear plate 10B is sandwiched between two gear plates 10A as shown in FIG. 6 is also included in the scope of the present invention. In the example of FIG. 6, gear components having large teeth are inevitably arranged at both ends of the laminated gear. However, when using at least two gear components having small teeth, As long as there is a portion in which at least one gear component having a small portion is sandwiched between normal gear components, a gear component having a small tooth portion is disposed on at least one end of the laminated gear. It doesn't matter. Further, the through-hole 13, the introduction groove 14, and the lead-out groove 15 for forming the supply part 21 are not limited to the illustrated form, and for example, as shown in FIGS. 7A and 7B, the tooth part 12 </ b> A. , 12B may be provided.

上記の形態では歯部１２Ｂを歯厚方向及び歯高方向のいずれに関しても歯部１２Ａより小さく形成したが、いずれか一方の方向のみ歯部１２Ｂを小さく形成してもよい。また、歯部１２Ｂは少なくとも一部が歯部１２Ａよりも小さく形成されていればよい。例えば、ピッチ円直径よりも歯元側のみ歯部１２Ｂを歯部１２Ａよりも小さく形成して、油溝を歯元付近に限定するような構成も本発明の範囲に含まれる。   In the above embodiment, the tooth portion 12B is formed smaller than the tooth portion 12A in both the tooth thickness direction and the tooth height direction, but the tooth portion 12B may be formed small in only one direction. Further, at least a part of the tooth portion 12B only needs to be formed smaller than the tooth portion 12A. For example, a configuration in which the tooth portion 12B is formed smaller than the tooth portion 12A only on the tooth root side than the pitch circle diameter and the oil groove is limited to the vicinity of the tooth root is also included in the scope of the present invention.

本発明の積層ギアは内燃機関の始動装置のクランクギアに限らず、各種のギアに適当可能である。外周に歯部が設けられたギアに限らず、内周に歯部が設けられたインターナルギアにも本発明は適用できる。   The laminated gear of the present invention is not limited to the crank gear of the starter of the internal combustion engine, and can be applied to various gears. The present invention can be applied not only to gears having teeth on the outer periphery but also to internal gears having teeth on the inner periphery.

本発明の積層ギアが適用される内燃機関用始動装置の一例を示す図。The figure which shows an example of the starter for internal combustion engines to which the laminated gear of this invention is applied. 図１のクランクギアを構成するギア構成部品としてのギアプレートの正面図。The front view of the gear plate as a gear component which comprises the crank gear of FIG. 図２のギアプレートの歯部を歯筋方向に沿って並べた状態を示す図。The figure which shows the state which arranged the tooth | gear part of the gear plate of FIG. 2 along the tooth trace direction. ギアプレートを組み合わせたクランクギアをクランクシャフトに取り付けた状態を示す軸線方向断面図。The axial direction sectional drawing which shows the state which attached the crank gear which combined the gear plate to the crankshaft. 図２のギア構成部品の組み合わせの他の例を示す図。The figure which shows the other example of the combination of the gear component of FIG. 最も少ない枚数のギアプレートで積層ギアを構成した例を示す図。The figure which shows the example which comprised the laminated gear with the fewest number gear plate. ギアプレートの他の例を示す図。The figure which shows the other example of a gear plate.

符号の説明Explanation of symbols

１ 始動装置
３ スタータギア
４ ドリブンギア
５ ワンウェイクラッチ
６ 中間ギア
７ クランクギア（積層ギア）
８ クランクシャフト
１０Ａ、１０Ｂ ギアプレート（ギア構成部品）
１１ 中心孔
１２Ａ、１２Ｂ 歯部
１３ 貫通孔
１４ 導入用溝部
１５ 導出用溝部
２０ 油溝
２１ 供給部
２２ 導入用油路
２３ 導出用油路
２４ 油穴
２５ 油溝

1 Starter 3 Starter Gear 4 Driven Gear 5 One-way Clutch 6 Intermediate Gear 7 Crank Gear (Laminated Gear)
8 Crankshaft 10A, 10B Gear plate (Gear component)
DESCRIPTION OF SYMBOLS 11 Center hole 12A, 12B Tooth part 13 Through-hole 14 Introducing groove part 15 Deriving groove part 20 Oil groove 21 Supply part 22 Introducing oil path 23 Deriving oil path 24 Oil hole 25 Oil groove

Claims (4)

複数のギア構成部品が同軸的に積層され、各ギア構成部品には歯部が設けられた積層ギアであって、
前記ギア構成部品の積層方向に関して両端に配置されるギア構成部品よりも当該積層方向の内側に配置される少なくとも一つのギア構成部品の歯部の少なくとも一部が、隣接する他のギア構成部品の歯部よりも歯厚方向又は歯高方向の少なくともいずれか一方向に関して小さく形成されていることを特徴とする積層ギア。 A plurality of gear components are laminated coaxially, and each gear component is a laminated gear provided with a tooth portion,
At least a part of the tooth portion of at least one gear component disposed inside the stacking direction of the gear component disposed at both ends with respect to the stacking direction of the gear component is adjacent to another gear component. A laminated gear characterized by being formed smaller than at least one of a tooth thickness direction and a tooth height direction than a tooth portion. 複数のギア構成部品が同軸的に積層され、外部から潤滑油が供給される供給部が設けられるとともに各ギア構成部品には歯部が設けられた積層ギアであって、
前記ギア構成部品の積層方向に関して両端に配置されるギア構成部品よりも当該積層方向の内側に配置される少なくとも一つのギア構成部品には、前記供給部から当該ギア構成部品の歯部へ潤滑油を導出する導出用溝部が設けられ、前記導出用溝部が隣接するギア構成部品にて覆われることにより前記供給部から前記歯部まで延びる導出用油路が形成されていることを特徴とする積層ギア。 A plurality of gear components are coaxially stacked, a supply portion to which lubricating oil is supplied from the outside is provided, and each gear component is a stacked gear provided with a tooth portion,
At least one gear component arranged inside the stacking direction with respect to the stacking direction of the gear component in the stacking direction includes a lubricant from the supply unit to a tooth portion of the gear component. And a lead-out oil passage extending from the supply portion to the tooth portion is formed by covering the lead-out groove portion with an adjacent gear component. gear. 外部から前記供給部を経て前記導出用溝部に至るまでの潤滑油の油路が複数のギア構成部品の組み合わせによって形成されていること特徴とする請求項２に記載の積層ギア。   The laminated gear according to claim 2, wherein an oil passage for lubricating oil from the outside through the supply portion to the lead-out groove portion is formed by a combination of a plurality of gear components. 前記ギア構成部品がプレス成型にて形成されていることを特徴とする請求項１〜３のいずれか一項に記載の積層ギア。

The laminated gear according to any one of claims 1 to 3, wherein the gear component is formed by press molding.

JP2004012327A 2004-01-20 2004-01-20 Laminated gear Pending JP2005207454A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009104624A1 (en) * 2008-02-21 2009-08-27 セイコーインスツル株式会社 Sliding part and timepiece
JP2012145122A (en) * 2011-01-06 2012-08-02 Hitachi Constr Mach Co Ltd Gear coupling
WO2020255349A1 (en) * 2019-06-20 2020-12-24 株式会社島津製作所 Gear mechanism

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009104624A1 (en) * 2008-02-21 2009-08-27 セイコーインスツル株式会社 Sliding part and timepiece
JP2010091544A (en) * 2008-02-21 2010-04-22 Seiko Instruments Inc Sliding component and timepiece
US20110045249A1 (en) * 2008-02-21 2011-02-24 Miei Sato Sliding component and timepiece
US8747993B2 (en) * 2008-02-21 2014-06-10 Seiko Instruments Inc. Sliding component and timepiece
CN101952783B (en) * 2008-02-21 2015-05-20 精工电子有限公司 Sliding part and timepiece
DE112009000385B4 (en) * 2008-02-21 2018-02-01 Seiko Instruments Inc. Sliding component and timepiece
JP2012145122A (en) * 2011-01-06 2012-08-02 Hitachi Constr Mach Co Ltd Gear coupling
WO2020255349A1 (en) * 2019-06-20 2020-12-24 株式会社島津製作所 Gear mechanism
JPWO2020255349A1 (en) * 2019-06-20 2020-12-24
JP7256972B2 (en) 2019-06-20 2023-04-13 株式会社島津製作所 gear mechanism
US12025214B2 (en) 2019-06-20 2024-07-02 Shimadzu Corporation Gear mechanism

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