JPH11257466A - Gear box - Google Patents
Gear boxInfo
- Publication number
- JPH11257466A JPH11257466A JP8057398A JP8057398A JPH11257466A JP H11257466 A JPH11257466 A JP H11257466A JP 8057398 A JP8057398 A JP 8057398A JP 8057398 A JP8057398 A JP 8057398A JP H11257466 A JPH11257466 A JP H11257466A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- lubricating oil
- tooth
- case
- immersed
- 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.)
- Granted
Links
Classifications
-
- 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
- F16H57/0427—Guidance of lubricant on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
-
- 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
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
-
- 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
-
- 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
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
- F16H57/0495—Gearings with spur or bevel gears with fixed gear ratio
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Gears, Cams (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、例えば、トラン
スミッションや差動歯車装置等に用いられている潤滑が
必要な歯車装置の改良に関する。
【０００２】
【従来の技術】従来の潤滑が必要な歯車装置としては、
例えば、特開平９−１３３１９９号公報に示すものが公
知である。
【０００３】この従来の歯車装置は、図８に示すよう
に、歯車の歯１の内部に設けた油溜りに多孔質材５を収
容し、この油溜りに連通し歯面３に開口する連絡穴４を
設け、多孔質材５に保持された潤滑油を歯面１に供給す
るように構成されている。尚、同図中、符号２は貫通穴
を、符号６は歯間の空間を示している。
【０００４】
【発明が解決しようとする課題】しかしながら、このよ
うに構成された従来の歯車装置にあっては、歯部内部に
設けた油溜りや歯面３へ開口する連絡穴４を設けている
ため、歯部の強度を低下させるという問題を有している
と共に、歯車を成形した後にさらに歯部に穴加工を施
し、かつ、油溜りに多孔質材５を収容するように構成し
ているため、製造コストが高くなる、という問題を有し
ていた。
【０００５】この発明は、かかる現状に鑑み創案された
ものであって、その目的とするところは、噛み合う一対
の歯車のうち、歯部の一部がケース内下部に溜った潤滑
油に浸漬している少なくとも片方の歯車の歯間に潤滑油
を保持して歯車対の噛み合い位置に潤滑油を供給するこ
とで、歯部内部の油溜りや歯面へ開口する連絡穴を形成
することなく歯車の潤滑を円滑に行うことができ、コス
トダウンも図ることができる歯車装置を提供しようとす
るものである。
【０００６】
【課題を解決するための手段】上記目的を達成するた
め、第１の発明にあっては、ケース内に収納された互い
に噛み合う一対のはすば歯車のうち少なくとも一方の歯
車の歯部の一部をケース内下部に溜った潤滑油に浸漬す
ると共に、該歯車の対となる歯車の噛み合い部が潤滑油
面より上方に位置するように構成されてなる歯車装置を
技術的前提とし、上記歯車の歯部の一部がケース内下部
に溜った潤滑油に浸漬しているはすば歯車の歯部側面の
片側であって回転方向に対してねじれ終わり側に、歯底
円径より小さい内径と歯先円径より大きい外径をもつ環
状プレートを設置すると共に、上記ケース内下部に溜っ
た潤滑油に歯車の歯部の一部が浸漬している歯車の外周
には、潤滑油面下から歯車の主回転方向に沿って噛み合
い初め部付近までを囲む位置に歯車歯先円径より大きい
円弧内径を有してなり、かつ、ケースに固定されるガイ
ドパーツを設置し、そのガイドパーツには歯車回転方向
に溝を設け、上記環状プレートの外周が該溝内を回転運
動するように構成したことを特徴とするものである。
【０００７】この発明にあっては、上記はすば歯車の歯
部側面の片側に設置した歯底円径より小さい内径と歯先
円径より大きい外径をもつ環状プレートをさらに反対側
にも設置すると共に、前記ケース内下部に溜った潤滑油
に歯車の歯部の一部が浸漬している歯車の外周に設置さ
れた前記ガイドパーツには、この増設した環状プレート
の外周が回転運動する２つ目の溝を形成して構成しても
よい。
【０００８】そして、上記ガイドパーツは、低摩擦抵抗
の合成樹脂材で形成するのが望ましい。
【０００９】また、上記環状プレートは、制振鋼板で形
成するのが望ましい。
【００１０】さらに、上記目的を達成するため、第２の
発明にあっては、ケース内に収納された互いに噛み合う
一対のはすば歯車のうち少なくとも一方の歯車の歯部の
一部をケース内下部に溜った潤滑油に浸漬すると共に、
該歯車の対となる歯車の噛み合い部が潤滑油面より上方
に位置するように構成されてなる歯車装置において、上
記ケース内下部に溜った潤滑油に歯車の歯部の一部が浸
漬している歯車の外周には、潤滑油面下から歯車の主回
転方向に沿って噛み合い初め部付近までを囲む位置に歯
車歯先円径より大きい円弧内径を有してなり、かつ、ケ
ースに固定されるガイドパーツを設置し、該ガイドパー
ツの内周側をコ字状に形成して、上記ケース内下部に溜
った潤滑油に歯車の歯部の一部が浸漬している歯車の潤
滑油面下から歯車の主回転方向に沿って噛み合い始め部
付近までの間で上記歯部の外周側及び両側面を包むよう
に設置し、歯底内径より内側のブランク部で歯車と接触
するように構成し、前記第１の発明における環状プレー
トを廃止して構成したことを特徴とするものである。
【００１１】
【発明の実施の形態例】以下、添付図面に基づいて、こ
の発明の実施の形態例を詳細に説明する。
【００１２】図ｌ乃至図５は、この発明の実施の第ｌ形
態例に係る歯車装置を示しており、歯車の歯部の一部が
ケース１１内の下部に溜った潤滑油に浸漬しているはす
ば歯車Ｏの歯部側面の内、図５に示す片側、即ち、はす
ば歯車Ｏの回転方向に対してねじれ終わり側、に歯底円
径より小さい内径と歯先円径より大きい外径をもつ環状
プレート２０を設置し、かつ、ケース１１内の下部に溜
った潤滑油に歯車の歯部の一部が浸漬しているはすば歯
車Ｏの外周を、潤滑油面１４下から歯車の回転方向に沿
って噛み合い初め部付近（図５参照）までを囲む位置に
歯車歯先円径より大きい円弧内径をもち、ケース１１に
固定されるガイドパーツ１９を設置し、該ガイドパーツ
１９には歯車回転方向に沿って溝４０が形成されてお
り、上記環状プレート２０の外周が該溝４０内を回転運
動するように構成されている。尚、図中符号１３ははす
ば歯車Ｏの回転中心を、符号１２は、はすば歯車Ｏと噛
合する歯車Ｏ’の回転中心を、符号１５は歯車Ｏ’の歯
先円を、符号１６は歯車Ｏ’の歯底円を、符号１７はは
すば歯車Ｏの歯先円を、符号１８ははすば歯車Ｏの歯底
円を、符号２１はケース１１に設けられたガイドパーツ
固定部を、符号２２はガイドパーツ１９のケース固定部
を、符号３２はディファレンシャルケースを、符号３３
ははすば歯車Ｏのディファレンシャルケース固定用ボル
トを、符号ａ，ｂはガイドパーツ１９と環状プレート２
０の回転半径クリアランスを、符号ｃはガイドパーツ１
９とはすば歯車Ｏの歯先円１７とのクリアランスを、夫
々示している。
【００１３】それ故、この形態例に係る歯車装置にあっ
ては、歯車の歯部がケース１１内下部に溜った潤滑油に
浸漬している間に、歯間の空間部に存在する潤滑油を、
歯車の片方の側面に歯車と同回転運動するように固定さ
れた環状プレート２０とケース１１に固定されたガイド
パーツ１９によって囲み、歯車の回転によりケース１１
下部に溜った潤滑油からその歯部が出た後も、歯間の潤
滑油がはすば歯車Ｏの回転によりねじれ終わり側に流れ
て側面から流出するのを環状プレート２０により防止
し、また、歯間の潤滑油がはすば歯車Ｏの回転による遠
心力で半径方向外側から飛び散るのをガイドパーツ１９
によって防止することができるので、潤滑油を保持する
ことができ、さらに、歯車対Ｏ，Ｏ’の噛み合い位置に
潤滑油を供給するように構成したので、歯車対Ｏ，Ｏ’
の噛み合いにおける潤滑を十分に行うことができる。
【００１４】また、この形態例に係る歯車装置のはすば
歯車Ｏでは、ねじれ角のため歯間に存在する潤滑油は歯
車Ｏの回転により慣性力が生じるが、その慣性力により
潤滑油はねじれ終わり側に流される。この力は高回転に
なるほど大きくなり、ねじれ始め側に流れ落ちる潤滑油
量は少ないので、環状プレート２０はねじれ終わり側の
みでも十分効果的な潤滑を得ることができる。
【００１５】図６は、この発明の実施の第２形態例に係
る歯車装置を示しており、前記第１形態例に係る歯車装
置における環状プレート２０に加え、はすば歯車Ｏの歯
部側面の片側の反対側にも歯底円径より小さい内径と歯
先円径より大きい外径をもつ環状プレート５１を設置
し、かつ、ケース１１内下部に溜った潤滑油に歯車の歯
部の一部が浸漬しているはすば歯車Ｏの外周を、潤滑油
面下から歯車の回転方向に沿って噛み合い部付近まで囲
む位置に歯車歯先円径より大きい円弧内径をもつガイド
パーツ５０の、上記増設した環状プレート５１の外周が
回転運動する位置に溝を形成し、２つの環状プレート２
０，５１の外周がガイドパーツ５０の２つの溝内を回転
運動するように構成されている。
【００１６】それ故、この形態例に係る歯車装置にあっ
ては、潤滑油に浸漬している歯間の空間部に充填された
潤滑油を、歯車の両側面に歯車と同回転運動するように
固定された環状プレート２０，５１とケースに固定され
たガイドパーツ５０によって、歯間の両側及び半径方向
外側から潤滑油が飛び散るのを防止し、歯車の向かい合
う歯面と歯底と両側面の環状プレート２０，５１とガイ
ドパーツ５０により囲まれた部分に潤滑油を保持し、歯
車対の噛み合い位置に供給するように構成したので、歯
車対の噛み合いにおける潤滑を十分に行うことができ
る。
【００１７】また、この形態例に係る歯車装置にあって
は、さらに、両側面に環状プレート２０，５１を配置し
たことで、歯間の潤滑油の受ける慣性力が小さい低回転
時においても確実に潤滑油を保持することができ、さら
に、ねじれ角の小さいはすば歯車Ｏや平歯車において
も、潤滑油を確実に保持することができる。
【００１８】図７は、この発明の実施の第３形態例に係
る歯車装置を示しており、この形態例では、前記第１及
び第２形態例で用いた環状プレートを設置せずに、ガイ
ドパーツ６０の内周側をコ字状に形成して、ケース内下
部に溜った潤滑油に歯車の歯部の一部が浸漬している歯
車の、潤滑油面下から歯車の主回転方向に沿って噛み合
い始め部付近までの間に、歯部の外周側及び両側面を包
むように形成することで、歯底円径より内周側のブラン
ク部にて歯車と接触するように構成したものである。
【００１９】それ故、この形態例に係る歯車装置にあっ
ては、ガイドパーツ６０を環状プレートと一体化させる
ように構成したことにより、部品点数を減らすことがで
き、その結果、組み付け作業性を向上させることができ
る。
【００２０】尚、この発明において、上記ガイドパーツ
１９，５０，６０は、摩擦係数が小さい合成樹脂で形成
するのが望ましく、これにより、環状プレート２０，５
１とガイドパーツ１９，５０，６０が接触した場合のフ
リクションを低減することができ、ガイドパーツ１９，
５０，６０に設定する溝と環状プレート２０，５１の間
の前記クリアランスａ，ｂ（図４参照）をより小さく設
定できるので、歯間の潤滑油保持における気密性を高め
ることができる、という効果が得られる。
【００２１】また、この発明において、上記環状プレー
ト２０，５１は、制振効果がある鋼板で形成するのが望
ましく、これにより、歯車対の噛み合いによって生じる
噛み合い起振力が歯車のブランクやボルト結合されたデ
フケース等に伝達されるのを有効に低減することができ
る。
【００２２】
【発明の効果】請求項１に記載された発明によれば、環
状プレートとケースに固定されたガイドパーツによって
歯間の空間部に存在する潤滑油を囲み、歯車の回転によ
りケース下部に溜った潤滑油からその歯部が出た後も、
歯間の潤滑油がはすば歯車の回転によりねじれ終わり側
に流れて側面から流出するのを環状プレートにより防止
するように構成したので、歯間の潤滑油がはすば歯車の
回転による遠心力で半径方向外側から飛び散るのをガイ
ドパーツによって防止することができ、潤滑油を保持す
ることができるので、歯部内部の油溜りや歯面へ開口す
る連絡穴を形成することなく歯車の潤滑を円滑に行うこ
とができ、コストダウンも図ることができる、という優
れた効果が得られる。
【００２３】また、請求項２に記載された発明によれ
ば、請求項１に記載された発明の効果に加え、両側面に
環状プレートを配置したことで、歯間の潤滑油の受ける
慣性力が小さい低回転時においても確実に潤滑油を保持
することができ、さらに、ねじれ角の小さいはすば歯車
や平歯車においても、潤滑油を確実に保持することがで
きる、という効果も得られる。
【００２４】さらに、請求項３に記載された発明によれ
ば、環状プレートとガイドパーツが接触した場合のフリ
クションを低減することができるため、ガイドパーツに
設定する溝と環状プレートの間のクリアランスをより小
さく設定でき、歯間の潤滑油保持における気密性を高め
ることができる、という効果が得られる。
【００２５】また、請求項４に記載された発明によれ
ば、環状プレートを、制振効果がある鋼板で形成したの
で、歯車対の噛み合いによって生じる噛み合い起振力が
歯車のブランクやボルト結合されたデフケース等に伝達
されるのを有効に低減することができる。
【００２６】さらに、請求項５に記載された発明によれ
ば、ガイドパーツと環状プレートとを一体化させること
により、部品点数を減らすことができ、その結果、組み
付け作業性を向上させることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a gear device that requires lubrication and is used in, for example, a transmission and a differential gear device. [0002] Conventional gear devices requiring lubrication include:
For example, the one disclosed in JP-A-9-133199 is known. [0003] In this conventional gear device, as shown in Fig. 8, a porous material 5 is accommodated in an oil sump provided inside a gear tooth 1, and communicates with the oil sump so as to open to a tooth surface 3. A hole 4 is provided to supply the lubricating oil held by the porous material 5 to the tooth surface 1. In the figure, reference numeral 2 denotes a through hole, and reference numeral 6 denotes a space between teeth. [0004] However, in the conventional gear device constructed as described above, an oil sump provided inside the tooth portion and a communication hole 4 opening to the tooth surface 3 are provided. Therefore, there is a problem that the strength of the tooth portion is reduced, and furthermore, after forming the gear, the tooth portion is further subjected to a hole processing, and the porous material 5 is accommodated in the oil reservoir. Therefore, there is a problem that the manufacturing cost increases. The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to immerse a part of a tooth portion of a pair of meshing gears in lubricating oil accumulated in a lower portion in a case. By holding the lubricating oil between the teeth of at least one of the gears and supplying the lubricating oil to the meshing position of the gear pair, the gear can be formed without forming an oil reservoir inside the tooth portion or a communication hole opening to the tooth surface. It is an object of the present invention to provide a gear device capable of smoothly performing lubrication and reducing costs. In order to achieve the above object, according to a first aspect of the present invention, a tooth of at least one of a pair of meshing helical gears housed in a case is provided. The technical premise of the present invention is a gear device in which a part of the gear unit is immersed in the lubricating oil collected in the lower part of the case, and the meshing part of the gear paired with the gear is located above the lubricating oil surface. A part of the tooth portion of the gear is immersed in the lubricating oil collected in the lower part of the case, on one side of the tooth portion side surface of the helical gear and at the end of twisting with respect to the rotation direction, the root bottom diameter An annular plate having a smaller inner diameter and an outer diameter larger than the tooth tip circle diameter is installed, and the outer periphery of the gear, in which a part of the gear tooth is immersed in the lubricating oil collected in the lower part of the case, is lubricated. Meshing begins below the oil level along the main rotation direction of the gear A guide part fixed to the case, having a circular arc inner diameter larger than the gear tip circle diameter at a position surrounding the vicinity of the portion, and providing a groove in the gear rotation direction in the guide part, The outer periphery of the plate is configured to rotate in the groove. According to the present invention, the annular plate having an inner diameter smaller than the root bottom circle diameter and an outer diameter larger than the tooth tip circle diameter provided on one side of the tooth side surface of the helical gear is further provided on the opposite side. At the same time, the outer circumference of the additional annular plate rotates around the guide part installed on the outer circumference of the gear in which a part of the gear tooth part is immersed in the lubricating oil accumulated in the lower part of the case. You may comprise and form a 2nd groove | channel. The guide parts are desirably formed of a synthetic resin material having low frictional resistance. Preferably, the annular plate is made of a damping steel plate. Further, in order to achieve the above object, according to a second aspect of the present invention, at least a part of a tooth portion of at least one of a pair of helical gears meshed with each other is accommodated in the case. While immersing in the lubricating oil collected at the bottom,
In a gear device in which the meshing portion of the gear paired with the gear is located above the lubricating oil level, a part of the gear tooth portion is immersed in the lubricating oil accumulated in the lower part of the case. The outer periphery of the gear has an arc inside diameter larger than the gear tip circle diameter at a position surrounding the vicinity of the beginning of meshing along the main rotation direction of the gear from below the lubricating oil level, and is fixed to the case. A guide part is installed, and the inner peripheral side of the guide part is formed in a U-shape, and the lubricating oil surface of the gear in which a part of the gear tooth part is immersed in the lubricating oil stored in the lower part of the case It is installed so as to wrap the outer peripheral side and both side surfaces of the above-mentioned tooth part from the bottom to the vicinity of the beginning of meshing along the main rotation direction of the gear, and is configured to contact the gear at the blank part inside the inner diameter of the tooth bottom. A configuration in which the annular plate in the first invention is eliminated It is characterized in that the. Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 to 5 show a gear device according to a first embodiment of the present invention, in which a part of a tooth portion of a gear is immersed in lubricating oil collected in a lower portion in a case 11. Of the tooth side surfaces of the helical gear O, on one side shown in FIG. 5, that is, on the side of the end of twisting with respect to the rotation direction of the helical gear O, the inner diameter smaller than the root bottom circle diameter and the tooth tip circle diameter An annular plate 20 having a large outer diameter is installed, and the outer periphery of the helical gear O in which a part of the gear teeth is immersed in the lubricating oil collected in the lower part of the case 11 is placed on the lubricating oil surface 14. A guide part 19 having an arc inner diameter larger than the diameter of the gear tooth tip and fixed to the case 11 is installed at a position surrounding the vicinity of the beginning of meshing (see FIG. 5) along the rotation direction of the gear from below. A groove 40 is formed in the part 19 along the gear rotation direction. Periphery 20 is configured to rotational movement within the groove 40. In the drawing, reference numeral 13 denotes the rotation center of the helical gear O, reference numeral 12 denotes the rotation center of the gear O 'meshing with the helical gear O, reference numeral 15 denotes the tip circle of the gear O', Reference numeral 16 denotes a root circle of the gear O ', reference numeral 17 denotes a tip circle of the helical gear O, reference numeral 18 denotes a root circle of the helical gear O, and reference numeral 21 denotes a guide part provided on the case 11. Reference numeral 22 denotes a case fixing portion of the guide part 19, reference numeral 32 denotes a differential case, and reference numeral 33 denotes a fixing case.
The bolts for fixing the differential case of the helical gear O are denoted by a and b.
0 is the radius of gyration clearance, and c is the guide part 1.
Numeral 9 indicates the clearance between the helical gear O and the tip circle 17. Therefore, in the gear device according to this embodiment, the lubricating oil existing in the space between the teeth while the teeth of the gear are immersed in the lubricating oil accumulated in the lower portion of the case 11. To
It is surrounded by an annular plate 20 fixed to one side surface of the gear so as to make the same rotational movement as the gear and a guide part 19 fixed to the case 11, and the case 11 is rotated by the rotation of the gear.
Even after the tooth portion comes out of the lubricating oil accumulated in the lower portion, the annular plate 20 prevents the lubricating oil between the teeth from flowing toward the end of the twist and flowing out from the side surface due to the rotation of the helical gear O. The guide parts 19 prevent the lubricating oil between the teeth from splashing from the outside in the radial direction due to the centrifugal force caused by the rotation of the helical gear O.
The lubricating oil can be held, and the lubricating oil is supplied to the meshing position of the gear pair O, O ', so that the gear pair O, O'
Lubrication can be sufficiently performed in the meshing of. In the helical gear O of the gear device according to this embodiment, the lubricating oil present between the teeth due to the torsion angle generates an inertial force due to the rotation of the gear O. It is washed away to the end of the twist. This force increases as the rotation speed increases, and the amount of lubricating oil flowing down to the twist start side is small. Therefore, the annular plate 20 can obtain sufficient effective lubrication only on the twist end side. FIG. 6 shows a gear device according to a second embodiment of the present invention. In addition to the annular plate 20 in the gear device according to the first embodiment, a tooth side surface of a helical gear O is shown. An annular plate 51 having an inner diameter smaller than the tooth bottom circle diameter and an outer diameter larger than the tooth tip circle diameter is also installed on one side opposite to the one side of the gear. Of the guide part 50 having an arc inner diameter larger than the gear tip circle diameter at a position surrounding the outer periphery of the helical gear O in which the portion is immersed from below the lubricating oil surface to near the meshing portion along the rotation direction of the gear, A groove is formed at a position where the outer periphery of the additional annular plate 51 rotates, and two annular plates 2 are formed.
The outer circumferences of 0 and 51 are configured to rotate in two grooves of the guide part 50. Therefore, in the gear device according to this embodiment, the lubricating oil filled in the space between the teeth immersed in the lubricating oil is rotated on both sides of the gear in the same rotational motion as the gear. The lubricating oil is prevented from splashing from both sides between the teeth and from the radially outer side by the annular plates 20, 51 fixed to the case and the guide parts 50 fixed to the case. Since the lubricating oil is held in a portion surrounded by the annular plates 20 and 51 and the guide part 50 and is supplied to the meshing position of the gear pair, lubrication in meshing of the gear pair can be sufficiently performed. Further, in the gear device according to this embodiment, the annular plates 20 and 51 are disposed on both side surfaces, so that the lubricating oil received between the teeth has a small inertia force and can be reliably operated even at low rotation. The lubricating oil can be reliably held even in the helical gear O and the spur gear having a small helix angle. FIG. 7 shows a gear device according to a third embodiment of the present invention. In this embodiment, a guide is provided without installing the annular plate used in the first and second embodiments. The inner peripheral side of the part 60 is formed in a U-shape, and a part of the gear tooth part is immersed in the lubricating oil accumulated in the lower part of the case. By forming so as to wrap the outer peripheral side and both side surfaces of the tooth portion up to the vicinity of the meshing start portion along, it is configured to contact the gear at the blank portion on the inner peripheral side from the root circle diameter. is there. Therefore, in the gear device according to this embodiment, the number of parts can be reduced by integrating the guide parts 60 with the annular plate, and as a result, the assembling workability is improved. Can be improved. In the present invention, the guide parts 19, 50 and 60 are desirably formed of a synthetic resin having a small coefficient of friction.
1 and the guide parts 19, 50, 60 can reduce the friction when contacting the guide parts 19, 50, 60.
Since the clearances a and b (see FIG. 4) between the grooves set at 50 and 60 and the annular plates 20 and 51 (see FIG. 4) can be set smaller, the airtightness in holding the lubricating oil between the teeth can be improved. Is obtained. In the present invention, the annular plates 20 and 51 are desirably formed of a steel plate having a vibration damping effect, so that the meshing vibrating force generated by the meshing of the gear pair reduces the gear blank and bolt connection. It is possible to effectively reduce the transmission to the differential case or the like. According to the first aspect of the present invention, the lubricating oil existing in the space between the teeth is surrounded by the annular plate and the guide parts fixed to the case, and the lower portion of the case is rotated by the rotation of the gear. Even after the teeth come out of the lubricating oil accumulated in the
The annular plate prevents lubricating oil between the teeth from flowing toward the end of the torsion due to the rotation of the helical gear and flowing out from the side surface. The guide parts prevent splashing from the outside in the radial direction due to the force, and can retain the lubricating oil, so the gear lubrication without forming an oil reservoir inside the tooth part and a communication hole opening to the tooth surface , And the cost can be reduced. According to the second aspect of the invention, in addition to the effects of the first aspect, the annular plates are arranged on both side surfaces, so that the lubricating oil between the teeth receives an inertial force. Can reliably retain lubricating oil even at low rotation speeds, and can also reliably retain lubricating oil even on helical gears and spur gears with a small helix angle. . Further, according to the third aspect of the present invention, the friction between the annular plate and the guide part can be reduced, so that the clearance between the groove set in the guide part and the annular plate can be reduced. The effect of being able to set smaller and improving airtightness in holding lubricating oil between teeth can be obtained. According to the fourth aspect of the present invention, since the annular plate is formed of a steel plate having a vibration-damping effect, the meshing vibrating force generated by the meshing of the gear pair is combined with the gear blank or bolt. The transmission to the differential case or the like can be effectively reduced. Further, according to the invention described in claim 5, by integrating the guide parts and the annular plate, the number of parts can be reduced, and as a result, the assembling workability can be improved. .
【図面の簡単な説明】
【図ｌ】この発明の実施の第１形態例に係る歯車装置の
概略構成説明図である。
【図２】図１におけるＯ−Ｏ’線断面図である。
【図３】図１におけるＯ−Ａ線断面図である。
【図４】図３Ｘ部拡大断面図である。
【図５】同歯車装置におけるはすば歯車の歯間潤滑油が
受ける慣性力を表す説明図である。
【図６】この発明の実施の第２形態例に係る歯車装置の
図１Ｏ−Ａ線断面図に相当する断面図である。
【図７】この発明の実施の第３形態例に係る歯車装置の
図１Ｏ−Ａ線断面図に相当する断面図である。
【図８】従来の歯車装置の要部の構成を示す部分斜視説
明図である。
【図９】従来の歯車装置の歯車歯部の概略構成説明図で
ある。
【符号の説明】
１ 歯車の歯
１１ ケース
１４ ケース下部に溜った潤滑油面
１９，５０，６０ ガイドパーツ
２０，５１ 環状プレート
２１ ケースに設けられたガイドパーツ固定部
２２ ガイドパーツのケース固定部
Ｏ はすば歯車
Ｏ’ はすば歯車と噛合する歯車BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural explanatory view of a gear device according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line OO ′ in FIG. FIG. 3 is a sectional view taken along line OA in FIG. FIG. 4 is an enlarged sectional view of a part X in FIG. 3; FIG. 5 is an explanatory diagram showing an inertial force received by lubricating oil between teeth of a helical gear in the gear device. FIG. 6 is a cross-sectional view corresponding to a cross-sectional view taken along the line OA of FIG. 10 of a gear device according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view corresponding to a cross-sectional view taken along the line IOA of a gear device according to a third embodiment of the present invention. FIG. 8 is a partial perspective explanatory view showing a configuration of a main part of a conventional gear device. FIG. 9 is a schematic configuration explanatory view of a gear tooth portion of a conventional gear device. [Description of Signs] 1 Gear teeth 11 Case 14 Lubricating oil surface 19, 50, 60 collected in the lower part of the case Guide parts 20, 51 Annular plate 21 Guide part fixing part provided in case 22 Guide part case fixing part O Helical gear O 'is a gear that meshes with the helical gear
Claims (1)
対のはすば歯車のうち少なくとも一方の歯車の歯部の一
部をケース内下部に溜った潤滑油に浸漬すると共に、該
歯車の対となる歯車の噛み合い部が潤滑油面より上方に
位置するように構成されてなる歯車装置において、上記
歯車の歯部の一部がケース内下部に溜った潤滑油に浸漬
しているはすば歯車の歯部側面の片側であって回転方向
に対してねじれ終わり側に、歯底円径より小さい内径と
歯先円径より大きい外径をもつ環状プレートを設置する
と共に、上記ケース内下部に溜った潤滑油に歯車の歯部
の一部が浸漬している歯車の外周には、潤滑油面下から
歯車の主回転方向に沿って噛み合い初め部付近までを囲
む位置に歯車歯先円径より大きい円弧内径を有してな
り、かつ、ケースに固定されるガイドパーツを設置し、
そのガイドパーツには歯車回転方向に溝を設け、上記環
状プレートの外周が該溝内を回転運動するように構成し
たことを特徴とする歯車装置。 【請求項２】 前記はすば歯車の歯部側面の片側に設置
した歯底円径より小さい内径と歯先円径より大きい外径
をもつ環状プレートをさらに反対側にも設置すると共
に、前記ケース内下部に溜った潤滑油に歯車の歯部の一
部が浸漬している歯車の外周に設置された前記ガイドパ
ーツには、この増設した環状プレートの外周が回転運動
する２つ目の溝を形成したことを特徴とする請求項１に
記載の歯車装置。 【請求項３】 前記ガイドパーツを低摩擦抵抗の合成樹
脂材で形成したことを特徴とする請求項１または請求項
２のいずれかに記載の歯車装置。 【請求項４】 前記環状プレートを、制振鋼板で形成し
たことを特徴とする請求項１または請求項２のいずれか
に記載の歯車装置。 【請求項５】 ケース内に収納された互いに噛み合う一
対のはすば歯車のうち少なくとも一方の歯車の歯部の一
部をケース内下部に溜った潤滑油に浸漬すると共に、該
歯車の対となる歯車の噛み合い部が潤滑油面より上方に
位置するように構成されてなる歯車装置において、上記
ケース内下部に溜った潤滑油に歯車の歯部の一部が浸漬
している歯車の外周には、潤滑油面下から歯車の主回転
方向に沿って噛み合い初め部付近までを囲む位置に歯車
歯先円径より大きい円弧内径を有してなり、かつ、ケー
スに固定されるガイドパーツを設置し、該ガイドパーツ
の内周側をコ字状に形成して、上記ケース内下部に溜っ
た潤滑油に歯車の歯部の一部が浸漬している歯車の潤滑
油面下から歯車の主回転方向に沿って噛み合い始め部付
近までの間で上記歯部の外周側及び両側面を包むように
設置し、歯底内径より内側のブランク部で歯車と接触す
るように構成したことを特徴とする歯車装置。Claims: 1. A part of a tooth portion of at least one of a pair of meshing helical gears housed in a case is immersed in lubricating oil stored in a lower portion of the case. In a gear device configured so that a meshing portion of a gear paired with the gear is located above a lubricating oil level, a part of the tooth portion of the gear is immersed in lubricating oil stored in a lower portion inside the case. An annular plate having an inner diameter smaller than the root circle diameter and an outer diameter larger than the tooth tip circle diameter is installed on one side of the tooth side surface of the helical gear and at the end of the twist in the rotation direction, A part of the gear tooth part is immersed in the lubricating oil collected in the lower part of the case. Do not have an arc inside diameter larger than the gear tip circle diameter. And, established a guide part that is fixed to the case,
A gear device, wherein a groove is provided in the guide part in the gear rotation direction, and the outer periphery of the annular plate is configured to rotate in the groove. 2. An annular plate having an inner diameter smaller than a root bottom circle diameter and an outer diameter larger than a tooth tip circle diameter, which is installed on one side of a tooth side surface of the helical gear, is further installed on the opposite side. The guide part installed on the outer periphery of the gear in which a part of the gear tooth is immersed in the lubricating oil accumulated in the lower part of the case has a second groove in which the outer periphery of the additional annular plate rotates. The gear device according to claim 1, wherein a gear is formed. 3. The gear device according to claim 1, wherein said guide part is formed of a synthetic resin material having a low frictional resistance. 4. The gear device according to claim 1, wherein the annular plate is formed of a damping steel plate. 5. A part of a tooth portion of at least one of a pair of helical gears meshed with each other housed in a case is immersed in lubricating oil stored in a lower portion of the case, and a pair of the gears is formed. In a gear device configured such that the meshing portion of the gear is located above the lubricating oil level, a part of the gear tooth portion is immersed in the lubricating oil accumulated in the lower part of the case. Has a circular arc inner diameter larger than the gear tip circle diameter at a position surrounding the lubricating oil from below the lubricating oil along the main rotation direction of the gear and near the beginning, and installs guide parts fixed to the case The inner peripheral side of the guide part is formed in a U-shape, and the main part of the gear is formed from below the lubricating oil level of the gear in which a part of the gear tooth part is immersed in the lubricating oil accumulated in the lower part of the case. In the direction of rotation, the above teeth A gear device characterized by being arranged so as to wrap the outer peripheral side and both side surfaces of the gear portion, and configured to be in contact with the gear at a blank portion inside the tooth root inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08057398A JP3255109B2 (en) | 1998-03-13 | 1998-03-13 | Gear device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08057398A JP3255109B2 (en) | 1998-03-13 | 1998-03-13 | Gear device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11257466A true JPH11257466A (en) | 1999-09-21 |
| JP3255109B2 JP3255109B2 (en) | 2002-02-12 |
Family
ID=13722091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08057398A Expired - Fee Related JP3255109B2 (en) | 1998-03-13 | 1998-03-13 | Gear device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3255109B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003185000A (en) * | 2001-12-19 | 2003-07-03 | Kanzaki Kokyukoki Mfg Co Ltd | Transmission for working vehicle |
| EP2083196A1 (en) * | 2008-01-25 | 2009-07-29 | GM Global Technology Operations, Inc. | Lubrication system in a transmission means, anduse of such a lubrication system, and a method tofor lubricate lubrication |
| JP2010139002A (en) * | 2008-12-11 | 2010-06-24 | Sumitomo Metal Ind Ltd | Gear device for rail vehicle |
| WO2011033833A1 (en) * | 2009-09-15 | 2011-03-24 | アイシン・エーアイ株式会社 | Transmission |
| DE102011011242A1 (en) * | 2011-02-15 | 2012-08-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Gearing body i.e. gear wheel, for use in e.g. gear box, has fluid flow channel assigned into evenly spaced teeth and partially passed inside body, where cooling medium is guided through flow channel inside body |
| CN105605188A (en) * | 2014-11-18 | 2016-05-25 | 武藏精密工业株式会社 | Differential device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5722369B2 (en) * | 2013-03-14 | 2015-05-20 | 本田技研工業株式会社 | transmission |
-
1998
- 1998-03-13 JP JP08057398A patent/JP3255109B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003185000A (en) * | 2001-12-19 | 2003-07-03 | Kanzaki Kokyukoki Mfg Co Ltd | Transmission for working vehicle |
| EP2083196A1 (en) * | 2008-01-25 | 2009-07-29 | GM Global Technology Operations, Inc. | Lubrication system in a transmission means, anduse of such a lubrication system, and a method tofor lubricate lubrication |
| JP2010139002A (en) * | 2008-12-11 | 2010-06-24 | Sumitomo Metal Ind Ltd | Gear device for rail vehicle |
| WO2011033833A1 (en) * | 2009-09-15 | 2011-03-24 | アイシン・エーアイ株式会社 | Transmission |
| JP2011064210A (en) * | 2009-09-15 | 2011-03-31 | Aisin Ai Co Ltd | Transmission |
| US8875841B2 (en) | 2009-09-15 | 2014-11-04 | Aisin Ai Co., Ltd. | Transmission |
| DE102011011242A1 (en) * | 2011-02-15 | 2012-08-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Gearing body i.e. gear wheel, for use in e.g. gear box, has fluid flow channel assigned into evenly spaced teeth and partially passed inside body, where cooling medium is guided through flow channel inside body |
| DE102011011242B4 (en) * | 2011-02-15 | 2015-04-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Gear body and method for producing a toothed body |
| CN105605188A (en) * | 2014-11-18 | 2016-05-25 | 武藏精密工业株式会社 | Differential device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3255109B2 (en) | 2002-02-12 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |