JP4759477B2 - Transmission housing - Google Patents

Transmission housing Download PDF

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JP4759477B2
JP4759477B2 JP2006243777A JP2006243777A JP4759477B2 JP 4759477 B2 JP4759477 B2 JP 4759477B2 JP 2006243777 A JP2006243777 A JP 2006243777A JP 2006243777 A JP2006243777 A JP 2006243777A JP 4759477 B2 JP4759477 B2 JP 4759477B2
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case
peripheral side
side wall
wall
partition wall
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JP2008064214A (en
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大貴 羽鳥
俊夫 丹波
史朗 尾神
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Aisin AI Co Ltd
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Aisin AI Co Ltd
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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
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Description

本発明は、自動車などの車両に搭載される変速機において、下部に形成した油溜まり部内に溜まった潤滑油をポンプにより吸入して潤滑を必要とする箇所に供給するようにした変速機ハウジングに関する。   The present invention relates to a transmission housing mounted on a vehicle such as an automobile, wherein the lubricating oil collected in an oil reservoir formed in a lower portion is sucked by a pump and supplied to a place where lubrication is required. .

この種の変速機ハウジングとしては、例えば特許文献１に開示されたものがある。この技術では、変速機を作動すると常に回転するポンプが変速機ハウジングの下部に形成した溜めから潤滑剤を吸引して、各ギヤのかみあう領域及び変速軸を支持する軸受などの潤滑を必要とする箇所に供給し、潤滑後の潤滑剤は重力により変速機ハウジングの下部の溜め内に戻されて再循環される。   An example of this type of transmission housing is disclosed in Patent Document 1. In this technique, a pump that rotates constantly when the transmission is operated sucks lubricant from a reservoir formed in the lower part of the transmission housing, and requires lubrication of the gear meshing region and a bearing that supports the transmission shaft. The lubricant after being supplied and lubricated is returned to the reservoir in the lower part of the transmission housing by gravity and recirculated.

この特許文献１に記載された技術内容によれば、通常はギヤの一部が溜め内の潤滑油中に部分的に浸っているので潤滑油の不必要なかきまぜ作用による効率の低下を招いて潤滑油の温度上昇を生じ、また下部の溜め内の潤滑油は、車両の加減速や曲線走行により水平方向の加速度が加わると水平方向に偏るので、ポンプへの吸入口の一部が潤滑油の油面より上側に露出してポンプに空気が吸入され、潤滑油の供給に支障をきたす恐れがある。このような問題を回避する手段としては、変速機ハウジングに形成する油溜まり部を局部的に下方に突出する形状とし（例えば特許文献２）、さらに変速機ハウジング内を隔壁により水平方向に仕切って潤滑油の水平方向移動を妨げることが考えられる。
特開平０７−１６７２６５号公報（段落〔０００５〕、段落〔００１８〕、段落〔００２１〕、段落〔００２４〕、図１、図２、図５、図６）。 特開２００５−１７２１２５号公報（図２）。 According to the technical contents described in Patent Document 1, since a part of the gear is usually partially immersed in the lubricating oil in the reservoir, the efficiency is reduced due to unnecessary stirring action of the lubricating oil. The temperature of the lubricating oil rises, and the lubricating oil in the lower reservoir is biased in the horizontal direction when a horizontal acceleration is applied due to vehicle acceleration / deceleration or running on a curve. The oil is exposed to the upper side of the oil surface and air is sucked into the pump, which may hinder the supply of lubricating oil. As a means for avoiding such a problem, an oil reservoir formed in the transmission housing has a shape protruding locally downward (for example, Patent Document 2), and the transmission housing is partitioned horizontally by a partition wall. It can be considered that the horizontal movement of the lubricating oil is hindered.
Japanese Patent Application Laid-Open No. 07-167265 (paragraph [0005], paragraph [0018], paragraph [0021], paragraph [0024], FIGS. 1, 2, 5, and 6). JP-A-2005-172125 (FIG. 2).

しかしながら変速機ハウジングを構成する複数のケースは筒状の鋳造品であり、このような鋳造品は隔壁の両側の筒状の周側壁の内面には両側に向かって広がる抜き勾配を必要とするので、潤滑に使用された潤滑油は隔壁から離れた周側壁の先端側に流れて溜まる。このように隔壁から離れた周側壁の下部に溜まった潤滑油を、隔壁の反対側に形成されて潤滑油の吸入口が設けられる油溜まり部に戻すには別途配管や穴あけ加工を必要とするので、製造コストが増大するという問題がある。   However, the plurality of cases constituting the transmission housing are cylindrical castings, and such castings require drafts extending toward both sides on the inner surfaces of the cylindrical peripheral side walls on both sides of the partition wall. The lubricating oil used for lubrication flows and accumulates on the tip side of the peripheral side wall away from the partition wall. Lubricating oil collected in the lower part of the peripheral side wall away from the partition wall as described above is returned to the oil reservoir portion formed on the opposite side of the partition wall and provided with the lubricating oil suction port. Therefore, there is a problem that the manufacturing cost increases.

本発明は変速機ハウジングの構造に工夫を加え、隔壁から離れた位置に溜まった潤滑油を、鋳抜きにより形成される筒状通路により隔壁の反対側に形成された油溜まり部に戻すようにして、このような問題を解決することを目的とする。   In the present invention, the structure of the transmission housing is devised so that the lubricating oil collected at a position away from the partition wall is returned to the oil reservoir formed on the opposite side of the partition wall by a cylindrical passage formed by casting. The purpose is to solve such problems.

このために、本発明による変速機ハウジングは、水平に延びる変速軸の長手方向に沿って配置されて液密に互いに接合連結された複数のケースからなり、変速軸を回転自在に支持するとともに下部に油溜まり部を形成し、この油溜まり部内に溜まった潤滑油をポンプにより吸入して潤滑を必要とする箇所に供給するようにした変速機ハウジングにおいて、筒状の第１周側壁を備えた第１ケースと、第１周側壁の端面に一端面が液密に接合連結される筒状の第２周側壁と、第１ケース側に接近した位置に形成されて第２周側壁の内部の少なくとも一部を第１ケースの内部から仕切る隔壁と、この隔壁の下部に基端部が連結されて第１ケースと反対側に向かって延びる筒状通路を備えた第２ケースよりなり、油溜まり部は第１ケースとこれに液密に接合連結される第２ケースの隔壁により形成される空間の下部に形成され、隔壁を境として第１ケースと反対側となる第２周側壁の内面には第１ケースと反対側に鋳抜き可能な抜き勾配を設け、筒状通路は隔壁に連結される基端部が第１ケース側に開口されるとともに第１ケースと反対側に向かって延びる先端部が隔壁により第１ケースの内部から仕切られた第２周側壁内の空間の第１ケースとは反対側となる位置に開口され、筒状通路の内面には第１ケース側に鋳抜き可能な抜き勾配を設け、筒状通路の底部の内面は第１ケース側が低くなるように傾斜させるとともに、その先端部は第２周側壁の第１ケースと反対側となる端面近くの底部の内面と同じ高さとして両底部を連続させ、筒状通路の基端部は第１ケースの第１周側壁の底部の内面よりも上方となる位置において隔壁に開口させたことを特徴とするものである。 To this end, a transmission housing according to the present invention comprises a plurality of cases that are arranged along the longitudinal direction of a transmission shaft that extends horizontally and are joined in a liquid-tight manner to each other, and rotatably supports the transmission shaft. A transmission housing in which an oil reservoir portion is formed and the lubricating oil accumulated in the oil reservoir portion is sucked by a pump and supplied to a place where lubrication is required. A first case, a cylindrical second peripheral side wall whose one end surface is liquid-tightly joined to the end surface of the first peripheral side wall, and a position close to the first case side; An oil sump comprising a partition that partitions at least a portion from the interior of the first case, and a second case that includes a cylindrical passage that extends toward the opposite side of the first case with a base end connected to a lower portion of the partition. Part is liquid-tight to the first case and this It is formed in the lower part of the space formed by the partition wall of the second case to be joined and can be cast on the inner surface of the second peripheral side wall opposite to the first case with the partition wall as the boundary on the opposite side to the first case A draft angle is provided, and the tubular passage is partitioned from the inside of the first case by a partition with a distal end extending toward the opposite side of the first case, while a base end connected to the partition is opened to the first case side. The space in the second peripheral side wall is opened at a position opposite to the first case, the inner surface of the cylindrical passage is provided with a draft angle that can be cast on the first case side, and the bottom of the cylindrical passage The inner surface of the bottom wall is inclined so that the first case side is lower, and the bottom end of the second peripheral side wall is the same height as the inner surface of the bottom portion near the end surface opposite to the first case , The base end of the channel passage is the bottom of the first peripheral side wall of the first case It is characterized in that is opened in the partition wall at a position above the well from the surface.

前項に記載の変速機ハウジングにおいて、第１ケースの第１周側壁の底部の内面は、第２ケースの内部の隔壁により第１ケースの内部から仕切られた部分となる第２周側壁の底部の内面より下方に位置させることが好ましい。 In the transmission housing according to the preceding item, an inner surface of a bottom portion of the first peripheral side wall of the first case is a portion of a bottom portion of the second peripheral side wall that is a portion partitioned from the inside of the first case by a partition wall inside the second case. Rukoto is positioned below the inner surface is preferred.

請求項１の発明によれば、隔壁の下部に連結される基端部が第１ケース側に開口されるとともに第１ケースと反対側に向かって延びる先端部が隔壁により第１ケースの内部から仕切られた第２周側壁内の空間の第１ケースとは反対側となる位置に開口される筒状通路は、内面に第１ケース側に鋳抜き可能な抜き勾配を設け、底部の内面を第１ケース側が低くなるように傾斜させるとともにその底部の内面の先端部を第２周側壁の第１ケースと反対側となる端面近くの底部の内面と同じ高さとして両底部を連続させ、筒状通路の基端部は第１ケースの第１周側壁の底部の内面よりも上方となる位置において隔壁に開口させている。従って、隔壁を境として第１ケースと反対側となる第２ケース内の潤滑に使用されて隔壁から離れた第２周側壁の下部の先端側に溜まった潤滑油は、別部材または別加工の必要なしに鋳抜きにより形成される筒状通路内を通って、隔壁と第１周側壁により形成される空間の下部に形成される油溜まり部に戻される。また下部に油溜まり部を形成する空間は隔壁により第１ケースと反対側となる第２ケース内の空間から仕切られており、水平方向の加速度による油溜まり部内の潤滑油の水平方向移動が妨げられるので、ポンプに空気が吸入されて潤滑油の供給に支障をきたす恐れは減少する。さらに隔壁にはそれを境として第１ケースと反対側となる第２ケース内に溜まった潤滑油を油溜まり部内に戻す開口が形成されているが、この開口には細長い筒状通路が連結されており、水平方向の加速度により油溜まり部側からこの開口を通って逆流しようとする潤滑油が隔壁を境として第１ケースと反対側となる第２ケース内の空間にすぐに広がることはないので、油溜まり部内の潤滑油がこの開口から隔壁の反対側に逆流する恐れは大幅に減少する。これにより水平方向の加速度による油溜まり部内の潤滑油の偏りが減少するので、ポンプに空気が吸入されて潤滑油の供給に支障をきたす恐れは大幅に減少する。 According to the first aspect of the present invention, the base end portion connected to the lower portion of the partition wall is opened to the first case side, and the distal end portion extending toward the side opposite to the first case is separated from the inside of the first case by the partition wall. The cylindrical passage opened at a position opposite to the first case in the space in the partitioned second peripheral side wall is provided with a draft angle that can be cast on the first case side on the inner surface, and the inner surface of the bottom portion is provided. is continuously both bottom as the same height as the first case and opposite to become an end surface near the bottom of the inner surface of the second circumferential side wall of the tip portion of the inner surface of its bottom with tilting such that the first case side lower, cylindrical The base end portion of the shaped passage is opened to the partition wall at a position above the inner surface of the bottom portion of the first peripheral side wall of the first case . Therefore, the lubricating oil used for lubrication in the second case on the opposite side of the first case with the partition wall as a boundary and accumulated on the lower end side of the second peripheral side wall away from the partition wall is separated from another member or processed separately. It passes through the cylindrical passage formed by casting without need and is returned to the oil reservoir formed in the lower part of the space formed by the partition wall and the first peripheral side wall. The space that forms the oil reservoir in the lower part is partitioned from the space in the second case that is opposite to the first case by a partition wall, preventing horizontal movement of the lubricating oil in the oil reservoir due to horizontal acceleration. Therefore, the risk of air being sucked into the pump and hindering the supply of lubricating oil is reduced. Further, the partition wall is formed with an opening for returning the lubricating oil accumulated in the second case opposite to the first case to the inside of the oil reservoir, and an elongated cylindrical passage is connected to the opening. Therefore, the lubricating oil that is going to flow backward through this opening from the oil reservoir side by horizontal acceleration does not immediately spread into the space in the second case opposite to the first case with the partition wall as a boundary. Therefore, the risk of the lubricating oil in the oil reservoir flowing backward from this opening to the opposite side of the partition is greatly reduced. As a result, the deviation of the lubricating oil in the oil reservoir due to the acceleration in the horizontal direction is reduced, so that the possibility of air being sucked into the pump and hindering the supply of the lubricating oil is greatly reduced.

また請求項２の発明によれば、第１ケースの第１周側壁の底部の内面は第２ケースの内部の隔壁により第１ケースの内部から仕切られた部分となる第２周側壁の底部の内面より下方に位置させているので、筒状通路の基端部は第１ケースの第１周側壁の底部の内面よりも上方となる位置において隔壁に開口させていることと相まって、隔壁から離れた第２周側壁の下部の先端側に溜まった潤滑油は一層確実に油溜まり部に戻され、また油溜まり部内の潤滑油が筒状通路を通って隔壁を境として第１ケースと反対側となる第２ケース内の空間に逆流するおそれも一層減少する。 According to the invention of claim 2, the inner surface of the bottom of the first peripheral side wall of the first case is the portion of the bottom of the second peripheral side wall that is a part partitioned from the inside of the first case by the partition inside the second case. Since it is located below the inner surface, the base end portion of the cylindrical passage is coupled with the opening of the partition wall at a position that is above the inner surface of the bottom of the first peripheral side wall of the first case. The lubricating oil collected at the tip of the lower part of the separated second peripheral side wall is more reliably returned to the oil sump, and the lubricating oil in the oil sump passes through the cylindrical passage and is opposite to the first case across the partition wall. The possibility of backflowing into the space in the second case on the side is further reduced.

以下に図１〜図４により、本発明による変速機ハウジングの最良の実施形態の説明をする。主として図１に示すように、この実施形態による変速機ハウジングは、何れも水平で互いに平行に配置された複数の変速軸（入力軸４０、副軸４１、出力軸４２、第２副軸及び後進軸（後の２つは図示省略））を回転自在に支持するもので、各変速軸４０，４１，４２の長手方向に沿って配置されて液密に互いに接合連結された第１ケース１０、第２ケース２０及び第３ケース３０により構成されている。各ケース１０，２０，３０は何れも軽合金製の鋳造品であり、それらの接合面及び各変速軸を支持する軸受のための支持穴は何れも切削加工により形成されている。   The best embodiment of the transmission housing according to the present invention will be described below with reference to FIGS. As shown mainly in FIG. 1, the transmission housing according to this embodiment includes a plurality of transmission shafts (an input shaft 40, a counter shaft 41, an output shaft 42, a second counter shaft and a reverse drive), all of which are horizontal and parallel to each other. A first case 10 that rotatably supports a shaft (the latter two are not shown) and that is disposed along the longitudinal direction of each of the transmission shafts 40, 41, and 42 and is joined to each other in a liquid-tight manner. The second case 20 and the third case 30 are configured. Each of the cases 10, 20, and 30 is a cast product made of a light alloy, and the joint surfaces thereof and the support holes for bearings that support the transmission shafts are all formed by cutting.

第１ケース１０は、入力軸４０及び副軸４１の長手方向に沿って延びる全体として筒状の第１周側壁１１と、両軸４０，４１と直交するように配置されて第１周側壁１１の内部を２つに仕切る第１隔壁１２を備えたものである。図１において第１隔壁１２よりも右側（第２ケース２０側）となる第１周側壁１１の内面１１ａには第２ケース２０側に鋳抜き可能な抜き勾配が設けられ、第２ケース２０が連結される先端縁には厚肉部１１ｂ及び締付ボルト１５のためのねじ穴を設けた複数の突出部１１ｃが形成され、また第１隔壁１２よりも左側となる第１周側壁１１は末広形に開くクラッチハウジングに形成されている。第１隔壁１２には、入力軸４０及び副軸４１を支持する軸受のための第１貫通支持穴１３及び第２貫通支持穴１４が切削形成されている。   The first case 10 is disposed so as to be orthogonal to both the shafts 40, 41 and the first circumferential side wall 11 as a whole extending along the longitudinal direction of the input shaft 40 and the auxiliary shaft 41. Is provided with a first partition wall 12 that divides the interior into two. In FIG. 1, the inner surface 11a of the first peripheral side wall 11 on the right side of the first partition wall 12 (on the second case 20 side) is provided with a draft angle that can be cast on the second case 20 side. A plurality of projecting portions 11c provided with thick holes 11b and screw holes for the fastening bolts 15 are formed at the leading edge of the connection, and the first peripheral side wall 11 on the left side of the first partition wall 12 is divergent. It is formed in a clutch housing that opens into a shape. The first partition wall 12 is formed with a first through support hole 13 and a second through support hole 14 for bearings that support the input shaft 40 and the sub shaft 41 by cutting.

第２ケース２０は、主として図１に示すように、入力軸４０及び副軸４１の長手方向に沿って延びる全体として筒状で両端面２０ａ，２０ｂがそれぞれ第１ケース１０及び第３ケース３０と液密に接合連結される第２周側壁２１と、第１ケース１０側となる一端面２０ａに接近した位置に両軸４０，４１と直交するように形成されて第２周側壁２１の内部の大部分を第１ケース１０の内部から仕切る第２隔壁（隔壁）２２と、この第２隔壁２２の下部に基端部が連結されて第１ケース１０と反対側に向かって延びる筒状通路２３を備えたものである。隔壁２２を境として第１ケース１０と反対側となる第２周側壁２１の内面２１ａには、第１ケース１０と反対側に鋳抜き可能な抜き勾配が設けられている。第２周側壁２１の第１ケース１０側には、第２隔壁２２と整列した位置から半径方向外向きに突出して、第１周側壁１１の厚肉部１１ｂに接合される厚肉部２１ｂ１及び締付ボルト１５のための貫通穴を設けた複数の突出部２１ｂ２を有するフランジ部２１ｂが形成されている。第２周側壁２１の第３ケース３０側となる先端縁には、厚肉部２１ｃ及び締付ボルト３５のためのねじ穴を設けた複数の突出部２１ｄが形成されている。   As shown mainly in FIG. 1, the second case 20 has a generally cylindrical shape extending along the longitudinal direction of the input shaft 40 and the auxiliary shaft 41, and both end surfaces 20 a and 20 b are respectively the same as the first case 10 and the third case 30. The second peripheral side wall 21 that is joined and connected in a liquid-tight manner and a position close to the one end face 20a on the first case 10 side are formed so as to be orthogonal to both the shafts 40 and 41, and inside the second peripheral side wall 21. A second partition wall (partition wall) 22 that partitions most from the inside of the first case 10, and a cylindrical passage 23 having a base end connected to the lower part of the second partition wall 22 and extending toward the opposite side of the first case 10. It is equipped with. On the inner surface 21a of the second peripheral side wall 21 on the opposite side to the first case 10 with the partition wall 22 as a boundary, a draft angle that can be cast on the opposite side to the first case 10 is provided. On the first case 10 side of the second peripheral side wall 21, a thick part 21 b 1 that protrudes radially outward from a position aligned with the second partition wall 22 and is joined to the thick part 11 b of the first peripheral side wall 11, A flange portion 21b having a plurality of protruding portions 21b2 provided with through holes for the fastening bolts 15 is formed. A plurality of protrusions 21 d provided with a thick wall portion 21 c and screw holes for the fastening bolts 35 are formed at the leading edge of the second peripheral side wall 21 on the third case 30 side.

図１〜図３に示すように、筒状通路２３は断面形状が横長の長方形の細長い筒状で、第２隔壁２２の下部に取り付けられる基端部は第１ケース１０内に開口され、第３ケース３０側に向かって延びる筒状通路２３の先端部２３ｂは、隔壁２２により第１ケース１０の内部から仕切られた第２ケース２０の第２周側壁２１内の空間の第１ケース１０とは反対側となる位置に開口されている。筒状通路２３の内面２３ａには第１ケース１０側に鋳抜き可能な抜き勾配が設けられ、筒状通路２３の底部の内面２３ａは第１ケース１０側が低くなるように傾斜させるとともに、底部の内面２３ａの先端部は第２周側壁２１の第１ケース１０と反対側となる端面２０ｂ近くの底部の内面２１ａと同じ高さとして両底部の内面２３ａ，２１ａは連続されている。 As shown in FIG. 1 to FIG. 3, the cylindrical passage 23 is an elongated cylindrical shape having a horizontally long cross-sectional shape, and a base end portion attached to the lower portion of the second partition wall 22 is opened in the first case 10, distal end 23b of the tubular passage 23 extending toward the 3 case 30 side, the first case 10 in the space within the second circumferential side wall 21 of the second case 20 is partitioned from the interior of the first case 10 by a partition 22 Is opened at a position on the opposite side . The inner surface 23a of the cylindrical passage 23 is provided with a draft angle that can be cast on the first case 10 side. The inner surface 23a of the bottom portion of the cylindrical passage 23 is inclined so that the first case 10 side is lowered, and The front end portion of the inner surface 23a has the same height as the inner surface 21a of the bottom portion near the end surface 20b opposite to the first case 10 of the second peripheral side wall 21, and the inner surfaces 23a, 21a of both bottom portions are continuous.

また第２隔壁２２には、第１ケース１０の第１及び第２貫通支持穴１３，１４と同軸的に、第１及び第２貫通穴２４ａ，２５ａを設けた第１及び第２ボス部２４，２５が形成され、各ボス部２４，２５にはそれぞれ入力軸４０及び副軸４１を支持する軸受のための第１及び第２軸受支持穴２４ｂ，２５ｂが形成されている。さらに第２隔壁２２には、図２及び図３に示すように、第２副軸及び後進軸を支持する軸受のための第３及び第４貫通穴２６ａ，２７ａを設けた第３及び第４ボス部２６，２７が形成されている。なお第２周側壁２１の外側には、軸線方向に沿って複数の補強リブ２８ａ，２８ｂが設けられている。   The second partition wall 22 has first and second boss portions 24 provided with first and second through holes 24a and 25a coaxially with the first and second through support holes 13 and 14 of the first case 10. 25, and first and second bearing support holes 24b and 25b for bearings for supporting the input shaft 40 and the countershaft 41 are formed in the boss portions 24 and 25, respectively. Further, as shown in FIGS. 2 and 3, the second partition wall 22 is provided with third and fourth through holes 26a and 27a for bearings for supporting the second countershaft and the reverse shaft. Boss portions 26 and 27 are formed. A plurality of reinforcing ribs 28a and 28b are provided outside the second peripheral side wall 21 along the axial direction.

第３ケース３０は、図１に示すように、第３周側壁３１と後壁３２よりなる皿状で、第２ケース２０の他端面２０ｂと液密に接合連結される第３周側壁３１の端面には、厚肉部３１ａ及び締付ボルト３５のための貫通穴を設けた複数の突出部３１ｂが形成されている。第３ケース３０の後壁３２には、第２ケース２０の第１及び第２ボス部２４，２５と同軸的に、第３貫通穴３３ａを設けた第３ボス部３３と凹部３４ａを設けた第４ボス部３３が形成され、第３ボス部３３には入力軸４０と同軸的に配置した出力軸４２を支持する軸受のための第３軸受支持穴３３ｂが形成され、第４ボス部３３には副軸４１を支持する軸受のための第４軸受支持穴３４ｂが形成されている。   As shown in FIG. 1, the third case 30 has a dish shape composed of a third peripheral side wall 31 and a rear wall 32, and is connected to the other end surface 20 b of the second case 20 in a liquid-tight manner. A plurality of protruding portions 31b provided with through holes for the thick portion 31a and the fastening bolt 35 are formed on the end surface. The rear wall 32 of the third case 30 is provided with a third boss portion 33 provided with a third through hole 33a and a concave portion 34a coaxially with the first and second boss portions 24, 25 of the second case 20. A fourth boss portion 33 is formed, and the third boss portion 33 is formed with a third bearing support hole 33 b for a bearing that supports the output shaft 42 disposed coaxially with the input shaft 40. Is formed with a fourth bearing support hole 34b for the bearing that supports the sub shaft 41.

次に、図４により、上述した第２ケース２０のダイカスト法による製造方法の説明をする。この製造方法に使用する成形型は、ダイカストマシンの固定部材に取り付けられる固定型５０と、固定部材に対し接近離隔される可動部材に取り付けられる可動型５２と、円周方向に複数（例えば４個）に分割されそれぞれ固定部材に対し半径方向に移動可能に取り付けられてシリンダにより進退されるスライドコア５１により構成されている。図４に示すように成形型が閉じられた型締め状態では、固定型５０の突出部５０ａ及び可動型５２の低い突出部５２ａは多少の隙間をおいてスライドコア５１内に入り、固定型５０と可動型５２の各突出部５０ａ，５２ａの間には、可動型５２の第１突出部５２ｂの先端が固定型５０の低い凹状段部に当接され、また可動型５２の第２及び第３突出部５２ｃ，５２ｄの先端が固定型５０の先端の凹部に当接されているのを除き、多少の隙間が設けられている。第２ケース２０の第２周側壁２１の内面２１ａとこの内面２１ａに連続される筒状通路２３の外面を成形する突出部５０ａの外周面には鋳抜き可能な抜き勾配が形成され、また筒状通路２３の内面２３ａを形成する第１突出部５２ｂの外面にも鋳抜き可能な抜き勾配が形成されている。   Next, the manufacturing method by the die-casting method of the 2nd case 20 mentioned above is demonstrated with reference to FIG. The molding die used in this manufacturing method includes a fixed die 50 attached to a fixed member of a die casting machine, a movable die 52 attached to a movable member that is moved away from the fixed member, and a plurality of (for example, four pieces) in the circumferential direction. And a slide core 51 which is attached to the fixing member so as to be movable in the radial direction and is advanced and retracted by a cylinder. As shown in FIG. 4, in the clamped state in which the mold is closed, the protrusion 50 a of the fixed mold 50 and the low protrusion 52 a of the movable mold 52 enter the slide core 51 with a slight gap between them. Between the protrusions 50a and 52a of the movable mold 52, the tip of the first protrusion 52b of the movable mold 52 is brought into contact with the low concave step of the fixed mold 50. Except that the tips of the three protrusions 52c and 52d are in contact with the recesses at the tip of the fixed mold 50, a slight gap is provided. A draft angle that can be cast is formed on the outer peripheral surface of the inner surface 21a of the second peripheral side wall 21 of the second case 20 and the outer surface of the projecting portion 50a that forms the outer surface of the cylindrical passage 23 continuous with the inner surface 21a. A draft that can be cast is also formed on the outer surface of the first protrusion 52 b that forms the inner surface 23 a of the channel 23.

この状態で固定型５０とスライドコア５１と可動型５２の間に形成されるキャビティに軽合金の溶湯を加圧注入すれば、第２ケース２０の素材が成形される。成形後に成形型を開いて取り出された第２ケース２０の素材は、第１及び第３ケース１０，３０と接合連結される両端面２０ａ，２０ｂを形成するための加工及び第１及び第２ボス部２４，２５内面の軸受下穴２４ｂ１，２５ｂ１にそれぞれ第１及び第２軸受支持穴２４ｂ，２５ｂを形成するための加工は必要である。しかし、隔壁２２を境として第３ケース３０側となる第２周側壁２１の内面２１ａに溜まる潤滑油を第１ケース１０側の油溜まり部Ａに戻すための筒状通路２３は、鋳抜きにより形成されるので後加工の必要はない。   In this state, if a light alloy melt is injected under pressure into the cavity formed between the fixed mold 50, the slide core 51, and the movable mold 52, the material of the second case 20 is molded. The material of the second case 20 taken out by opening the mold after molding is processed to form both end faces 20a and 20b joined and connected to the first and third cases 10 and 30, and the first and second bosses. Processing for forming the first and second bearing support holes 24b and 25b in the bearing pilot holes 24b1 and 25b1 on the inner surfaces of the portions 24 and 25 is necessary. However, the cylindrical passage 23 for returning the lubricating oil collected on the inner surface 21a of the second peripheral side wall 21 on the third case 30 side with the partition wall 22 to the oil reservoir A on the first case 10 side is formed by casting. Since it is formed, there is no need for post-processing.

上述した第１〜第３ケース１０，２０，３０は、第１ケース１０の第１周側壁１１の厚肉部１１ｂ側の端面と第２ケース２０のフランジ部２１ｂ側の一端面２０ａを接合して、各突出部２１ｂ２の貫通穴に挿入した各締付ボルト１５を突出部１１ｃのねじ穴にねじ込んで締め付けて液密に連結し、同様に第３ケース３０の第３周側壁３１の端面と第２ケース２０の厚肉部２１ｃ側の他端面２０ｂを接合して締付ボルト３５により締め付けて液密に連結することにより、図１に示すような変速機ハウジングとなる。この変速機ハウジングでは、第１隔壁１２と第２隔壁２２の間となる空間内の下部に油溜まり部Ａが形成され、この油溜まり部Ａ内の潤滑油は変速機の作動時に常に作動するポンプ（図示省略）により吸入されて、変速機ハウジングの第１隔壁１２と第２隔壁２２の間の空間内及び第２隔壁２２と後壁３２の間の空間内の、各ギヤの噛み合い部や変速軸を支持する軸受などの潤滑を必要とする箇所に供給される。   The first to third cases 10, 20, and 30 described above join the end surface on the thick portion 11 b side of the first peripheral side wall 11 of the first case 10 and the end surface 20 a on the flange portion 21 b side of the second case 20. The fastening bolts 15 inserted into the through holes of the protrusions 21b2 are screwed into the screw holes of the protrusions 11c and tightened to form a liquid-tight connection. Similarly, the end face of the third peripheral side wall 31 of the third case 30 A transmission housing as shown in FIG. 1 is obtained by joining the other end surface 20b of the second case 20 on the thick wall portion 21c side and tightening it with a tightening bolt 35 for fluid-tight connection. In this transmission housing, an oil reservoir A is formed in the lower part of the space between the first partition 12 and the second partition 22, and the lubricating oil in the oil reservoir A always operates when the transmission operates. The gears are inhaled by a pump (not shown) and engaged with each gear in the space between the first partition wall 12 and the second partition wall 22 and the space between the second partition wall 22 and the rear wall 32 of the transmission housing. Supplied to a portion requiring lubrication, such as a bearing that supports the transmission shaft.

第１隔壁１２と第２隔壁２２の間の空間内の潤滑に使用された潤滑油は、重力により流れ落ちてその下部に形成される油溜まり部Ａ内に戻され、再びポンプにより吸入されて再循環される。また、第２隔壁２２と後壁３２の間の空間内の潤滑に使用された潤滑油は、重力によりその空間の下部に流れ落ちるが、第２周側壁２１の内面２１ａには第１ケース１０と反対向きに鋳抜き可能な抜き勾配が設けられているので、底部では矢印ａ１に示すように筒状通路２３側に向かいかつ油溜まり部Ａと反対側に向かって流れて、第３ケース３０側に溜まる潤滑油量が多くなる。しかしながら上述した実施形態では、第２隔壁２２の下部に基端部が連結されて第１ケース１０と反対側に向かって延びる筒状通路２３の先端部２３ｂは第３ケース３０側において第２隔壁２２と後壁３２の間の空間内に開口され、筒状通路２３の底部の内面２３ａは第１ケース１０側が低くなるように傾斜されるとともに内面２３ａの先端部を第２周側壁２１の第１ケース１０と反対側となる端面近くの底部の内面２１ａと同じ高さとして両底部を連続させているので、第２隔壁２２と後壁３２の間の空間内の底部の第３ケース３０側に溜まる潤滑油は、矢印ａ２に示すように筒状通路２３内を通って、第２隔壁２２と第１周側壁１１により形成される空間の下部に形成される油溜まり部Ａに確実に戻される。   The lubricating oil used for lubrication in the space between the first partition wall 12 and the second partition wall 22 flows down due to gravity and is returned to the oil reservoir A formed in the lower portion thereof, and is sucked again by the pump. Circulated. The lubricating oil used for lubrication in the space between the second partition wall 22 and the rear wall 32 flows down to the lower part of the space due to gravity, but the inner surface 21a of the second peripheral side wall 21 has the first case 10 and Since a draft angle that can be cast in the opposite direction is provided, the bottom portion flows toward the cylindrical passage 23 side and toward the opposite side to the oil reservoir portion A as indicated by an arrow a1, and the third case 30 side The amount of lubricating oil accumulated in is increased. However, in the above-described embodiment, the base end portion is connected to the lower portion of the second partition wall 22, and the distal end portion 23 b of the cylindrical passage 23 extending toward the opposite side of the first case 10 is located on the third case 30 side. The inner surface 23a of the bottom portion of the cylindrical passage 23 is inclined so that the first case 10 side is lowered, and the tip of the inner surface 23a is formed on the second peripheral side wall 21 in the space between the rear wall 32 and the rear wall 32. Since both bottoms are made to be the same height as the inner surface 21a of the bottom near the end surface opposite to the case 10, the third case 30 side of the bottom in the space between the second partition wall 22 and the rear wall 32 The lubricating oil accumulated in the oil passes through the cylindrical passage 23 as shown by the arrow a2 and is surely returned to the oil reservoir A formed in the lower part of the space formed by the second partition wall 22 and the first peripheral side wall 11. It is.

上述した実施形態では、下部に油溜まり部Ａを形成する第１隔壁１２と第２隔壁２２の間となる空間は第２隔壁２２により変速機ハウジング内のその他の空間から仕切られており、水平方向の加速度による油溜まり部Ａ内の潤滑油の水平方向移動が妨げられるので、ポンプに空気が吸入されて潤滑油の供給に支障をきたす恐れは減少する。また第２隔壁２２には第１ケース１０と反対側となる第２ケース２０及び第３ケース３０内に溜まった潤滑油を油溜まり部Ａ内に戻す開口が形成されているので、潤滑油の一部は水平方向の加速度によりこの開口を通って第２隔壁２２と後壁３２の間の空間内に逆流しようとする。しかしこの開口には細長い筒状通路２３が設けられているので、この開口を通って逆流しようとする潤滑油が第２隔壁２２と後壁３２の間の空間内にすぐに広がることはなく、従って油溜まり部Ａ内の潤滑油がこの開口から第２隔壁２２内に多量に逆流して油溜まり部Ａ内の油面を変動させる恐れはない。これにより水平方向の加速度による油溜まり部Ａ内の潤滑油の偏りが一層減少するので、ポンプに空気が吸入されて潤滑油の供給に支障をきたす恐れは一層減少する。   In the embodiment described above, the space between the first partition wall 12 and the second partition wall 22 that forms the oil sump portion A in the lower part is partitioned from the other spaces in the transmission housing by the second partition wall 22, Since the horizontal movement of the lubricating oil in the oil reservoir A due to the acceleration in the direction is hindered, the possibility that air is sucked into the pump and hinders the supply of the lubricating oil is reduced. Further, the second partition wall 22 is formed with an opening for returning the lubricating oil accumulated in the second case 20 and the third case 30 on the opposite side to the first case 10 into the oil reservoir A, so that the lubricating oil A part tends to flow backward through the opening into the space between the second partition wall 22 and the rear wall 32 by the acceleration in the horizontal direction. However, since the elongated cylindrical passage 23 is provided in this opening, the lubricating oil which is going to flow backward through this opening does not immediately spread into the space between the second partition wall 22 and the rear wall 32, Therefore, there is no possibility that the lubricating oil in the oil reservoir A will flow back in a large amount into the second partition wall 22 from this opening and change the oil level in the oil reservoir A. As a result, the deviation of the lubricating oil in the oil reservoir A due to the acceleration in the horizontal direction is further reduced, so that the possibility that air is sucked into the pump and hinders the supply of the lubricating oil is further reduced.

また上述した実施形態では、第２ケース２０の第２周側壁２１の第１ケース１０側には、半径方向外向きに突出するフランジ部２１ｂが形成されており、これにより第１ケース１０の第１周側壁１１の底部の内面１１ａは第２ケース２０の第２周側壁２１の第２隔壁２２を境として第１ケース１０と反対側となる底部の内面２１ａよりも下方に位置され、また筒状通路２３は第１ケース１０の第１周側壁１１の底部の内面１１ａよりも上方となる位置において第２隔壁２２に開口させている。このようにすれば第２隔壁２２から離れた第２周側壁２１の下部の先端側に溜まった潤滑油は一層確実に重力により油溜まり部Ａに戻され、また水平方向加速度による油溜まり部Ａ内の潤滑油の筒状通路２３を通る逆流もさらに一層減少する。これにより水平方向加速度による油溜まり部Ａ内の潤滑油の偏りがさらに一層減少するので、ポンプに空気が吸入されて潤滑油の供給に支障をきたす恐れはさらに一層減少する。なお上記実施形態では、フランジ部２１ｂは第２周側壁２１の全周に設けられているが、第２周側壁２１の下部に設けるだけでも同じ効果が得られる。   Further, in the above-described embodiment, the flange portion 21 b that protrudes outward in the radial direction is formed on the first case 10 side of the second peripheral side wall 21 of the second case 20. The inner surface 11a at the bottom of the first peripheral side wall 11 is positioned below the inner surface 21a at the bottom opposite to the first case 10 with the second partition wall 22 of the second peripheral side wall 21 of the second case 20 as a boundary. The shaped passage 23 is opened in the second partition wall 22 at a position above the inner surface 11 a of the bottom portion of the first peripheral side wall 11 of the first case 10. In this way, the lubricating oil collected on the tip side of the lower part of the second peripheral side wall 21 away from the second partition wall 22 is more reliably returned to the oil reservoir A by gravity, and the oil reservoir A due to horizontal acceleration. The backflow of the lubricating oil through the cylindrical passage 23 is further reduced. As a result, the deviation of the lubricating oil in the oil reservoir A due to the horizontal acceleration is further reduced, so that the possibility of air being sucked into the pump and hindering the supply of the lubricating oil is further reduced. In addition, in the said embodiment, although the flange part 21b is provided in the perimeter of the 2nd surrounding side wall 21, even if it provides only in the lower part of the 2nd surrounding side wall 21, the same effect is acquired.

本発明による変速機ハウジングの一実施形態の全体構造を示す縦断面図である。1 is a longitudinal sectional view showing the overall structure of an embodiment of a transmission housing according to the present invention. 図１の２−２断面図である。It is 2-2 sectional drawing of FIG. 図１の３−３断面図である。FIG. 3 is a 3-3 cross-sectional view of FIG. 1. 図１に示す実施形態の第２ケースのダイカスト法による製造方法を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the manufacturing method by the die-casting method of the 2nd case of embodiment shown in FIG.

符号の説明Explanation of symbols

１０…第１ケース、１１…第１周側壁、１１ａ…内面、２０…第２ケース、２０ａ…一端面、２１…第２周側壁、２１ａ…内面、２２…隔壁（第２隔壁）、２３…筒状通路、２３ａ…内面、２３ｂ…先端部、３０…第３ケース、４０，４１，４２…変速軸、Ａ…油溜まり部。
DESCRIPTION OF SYMBOLS 10 ... 1st case, 11 ... 1st surrounding side wall, 11a ... Inner surface, 20 ... 2nd case, 20a ... One end surface, 21 ... 2nd surrounding side wall, 21a ... Inner surface, 22 ... Partition (2nd partition), 23 ... Cylindrical passage, 23a ... inner surface, 23b ... tip, 30 ... third case, 40, 41, 42 ... transmission shaft, A ... oil reservoir.

Claims (2)

水平に延びる変速軸の長手方向に沿って配置されて液密に互いに接合連結された複数のケースからなり、前記変速軸を回転自在に支持するとともに下部に油溜まり部を形成し、この油溜まり部内に溜まった潤滑油をポンプにより吸入して潤滑を必要とする箇所に供給するようにした変速機ハウジングにおいて、
筒状の第１周側壁を備えた第１ケースと、
前記第１周側壁の端面に一端面が液密に接合連結される筒状の第２周側壁と、前記第１ケース側に接近した位置に形成されて前記第２周側壁の内部の少なくとも一部を前記第１ケースの内部から仕切る隔壁と、この隔壁の下部に基端部が連結されて前記第１ケースと反対側に向かって延びる筒状通路を備えた第２ケースよりなり、
前記油溜まり部は前記第１ケースとこれに液密に接合連結される前記第２ケースの隔壁により形成される空間の下部に形成され、
前記隔壁を境として前記第１ケースと反対側となる前記第２周側壁の内面には前記第１ケースと反対側に鋳抜き可能な抜き勾配を設け、
前記筒状通路は前記隔壁に連結される基端部が前記第１ケース側に開口されるとともに前記第１ケースと反対側に向かって延びる先端部が前記隔壁により前記第１ケースの内部から仕切られた前記第２周側壁内の空間の前記第１ケースとは反対側となる位置に開口され、
前記筒状通路の内面には前記第１ケース側に鋳抜き可能な抜き勾配を設け、
前記筒状通路の底部の内面は前記第１ケース側が低くなるように傾斜させるとともに、その先端部は前記第２周側壁の前記第１ケースと反対側となる端面近くの底部の内面と同じ高さとして両底部を連続させ、前記筒状通路の基端部は前記第１ケースの第１周側壁の底部の内面よりも上方となる位置において前記隔壁に開口させたこと
を特徴とする変速機ハウジング。 A plurality of cases that are arranged along the longitudinal direction of the transmission shaft that extends horizontally and are joined and connected to each other in a fluid-tight manner. The transmission shaft is rotatably supported and an oil reservoir is formed at a lower portion thereof. In a transmission housing in which lubricating oil accumulated in the section is sucked by a pump and supplied to a place where lubrication is required,
A first case with a cylindrical first peripheral side wall;
A cylindrical second peripheral side wall whose one end surface is liquid-tightly joined and connected to the end surface of the first peripheral side wall, and at least one inside the second peripheral side wall formed at a position close to the first case side. A partition that partitions the portion from the inside of the first case, and a second case that includes a cylindrical passage that extends toward the opposite side of the first case with a base end connected to a lower portion of the partition,
The oil reservoir is formed in a lower portion of a space formed by the first case and a partition wall of the second case that is liquid-tightly joined to the first case,
The inner surface of the second peripheral side wall that is opposite to the first case with the partition wall as a boundary is provided with a draft angle that can be cast on the opposite side to the first case,
The cylindrical passage has a base end portion connected to the partition wall opened to the first case side, and a distal end portion extending toward the opposite side of the first case is partitioned from the inside of the first case by the partition wall. Opened in a position opposite to the first case in the space in the second peripheral side wall ,
The inner surface of the cylindrical passage is provided with a draft angle that can be cast on the first case side,
The inner surface of the bottom portion of the cylindrical passage is inclined so that the first case side is lowered, and the front end portion thereof is the same height as the inner surface of the bottom portion near the end surface opposite to the first case of the second peripheral side wall. Both bottoms are made continuous, and the base end of the cylindrical passage is opened in the partition at a position above the inner surface of the bottom of the first peripheral side wall of the first case. housing. 請求項１に記載の変速機ハウジングにおいて、前記第１ケースの第１周側壁の底部の内面は、前記第２ケースの内部の前記隔壁により前記第１ケースの内部から仕切られた部分となる前記第２周側壁の底部の内面より下方に位置させたことを特徴とする変速機ハウジング。 In transmission housing according to claim 1, the bottom of the inner surface of the first peripheral wall of the first case, a second case inside the inside from the partitioned portion of the first case by a partition wall of the a transmission housing, characterized in that is positioned below the inner surface of the bottom portion of the second peripheral side wall.
JP2006243777A 2006-09-08 2006-09-08 Transmission housing Expired - Fee Related JP4759477B2 (en)

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JP5944791B2 (en) * 2012-08-24 2016-07-05 本田技研工業株式会社 Hybrid vehicle drive system
JP6958532B2 (en) * 2018-11-19 2021-11-02 マツダ株式会社 Lubrication structure of power transmission device
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07167265A (en) * 1993-09-17 1995-07-04 Dana Corp Transmission
JP2003113929A (en) * 2001-10-02 2003-04-18 Aisin Ai Co Ltd Lubricating structure of transmission
JP2003269586A (en) * 2002-03-14 2003-09-25 Aisin Ai Co Ltd Lubricating structure for transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07167265A (en) * 1993-09-17 1995-07-04 Dana Corp Transmission
JP2003113929A (en) * 2001-10-02 2003-04-18 Aisin Ai Co Ltd Lubricating structure of transmission
JP2003269586A (en) * 2002-03-14 2003-09-25 Aisin Ai Co Ltd Lubricating structure for transmission

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