JP2012189102A - Lubricant supply device - Google Patents

Lubricant supply device Download PDF

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JP2012189102A
JP2012189102A JP2011051560A JP2011051560A JP2012189102A JP 2012189102 A JP2012189102 A JP 2012189102A JP 2011051560 A JP2011051560 A JP 2011051560A JP 2011051560 A JP2011051560 A JP 2011051560A JP 2012189102 A JP2012189102 A JP 2012189102A
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oil passage
gear
lubricating oil
outer peripheral
surface side
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JP5742308B2 (en
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Jiro Isomura
治郎 磯村
Hiroyuki Shioiri
広行 塩入
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a lubricant supply device that improves performance where a lubricant is sent by a rotation of a gear, vertically upward.SOLUTION: The device includes: a case 2; a storage 3 that is arranged in the case and stores the lubricant; the gear 4 that is arranged in the case and sends the lubricant of the storage by rotation; and an oil path 5 that is formed between the case and an outer periphery of the gear and leads the lubricant sent by the rotation of the gear, vertically upward. The oil path includes: a side oil path which is a clearance in an axial direction of the gear between a side of the gear and the case; and an outer-peripheral-surface side oil path 52 which is a clearance in a radial direction of the gear between the outer peripheral surface of the gear and the case. At a part A where a radial width of the outer-peripheral-surface side oil path is narrow, an axial width of the side oil path is wider than a part B where the radial width of the outer-peripheral-surface side oil path is wide.

Description

本発明は、潤滑油供給装置に関する。   The present invention relates to a lubricating oil supply apparatus.

従来、ギアの回転によって潤滑油を鉛直方向上方に送る技術が知られている。例えば、特許文献１には、歯車対のうちで下方に位置する歯車が歯車ケース内の下部に溜まったオイルを掻き上げることにより、歯車対の噛み合い部に対して潤滑を行う歯車の潤滑構造において、板状のガイドを、下側歯車の外周に設ける技術が開示されている。   2. Description of the Related Art Conventionally, a technique for sending lubricating oil vertically upward by rotation of a gear is known. For example, Patent Document 1 discloses a gear lubrication structure in which a gear positioned below a gear pair scoops up oil accumulated in a lower portion of the gear case to lubricate a meshing portion of the gear pair. A technique for providing a plate-like guide on the outer periphery of a lower gear is disclosed.

特開２０００−２７４５１８号公報JP 2000-274518 A

ギアの回転によって潤滑油を鉛直方向上方に送る能力を向上させることについて、なお改善の余地がある。例えば、スペースの制約等によってギアの径方向外側に十分な隙間を設けることができない領域が存在するような場合であっても、ギアの回転によって潤滑油を鉛直方向上方に送る能力を確保できることが好ましい。   There is still room for improvement in improving the ability to send the lubricating oil vertically upward by the rotation of the gear. For example, even when there is a region where a sufficient gap cannot be provided on the outer side in the radial direction of the gear due to space restrictions, etc., it is possible to ensure the ability to send the lubricating oil upward in the vertical direction by the rotation of the gear. preferable.

本発明の目的は、ギアの回転によって潤滑油を鉛直方向上方に送る能力を向上させることができる潤滑油供給装置を提供することである。   An object of the present invention is to provide a lubricating oil supply device capable of improving the ability to send lubricating oil vertically upward by the rotation of a gear.

本発明の潤滑油供給装置は、ケースと、前記ケース内に配置され、潤滑油を貯留する貯留部と、前記ケース内に配置され、回転によって前記貯留部の潤滑油を送るギアと、前記ケースと前記ギアの外周との間に形成され、前記ギアの回転によって送られる潤滑油を鉛直方向上方に導く油路と、を備え、前記油路は、前記ギアの側面と前記ケースとの間の前記ギアの軸方向の隙間である側面側油路と、前記ギアの外周面と前記ケースとの間の前記ギアの径方向の隙間である外周面側油路とを有し、前記外周面側油路の前記径方向の幅が小さい箇所では、前記外周面側油路の前記径方向の幅が大きい箇所よりも、前記側面側油路の前記軸方向の幅が大きいことを特徴とする。   The lubricating oil supply device of the present invention includes a case, a storage part that is disposed in the case and stores the lubricating oil, a gear that is disposed in the case and feeds the lubricating oil in the storage part by rotation, and the case And an oil passage formed between the outer periphery of the gear and guiding the lubricating oil sent by the rotation of the gear upward in the vertical direction, the oil passage between the side surface of the gear and the case A side oil passage that is a gap in the axial direction of the gear, and an outer oil passage that is a gap in the radial direction of the gear between the outer peripheral surface of the gear and the case. In the part where the radial width of the oil passage is small, the width in the axial direction of the side oil passage is larger than the part where the radial width of the outer peripheral surface side oil passage is large.

上記潤滑油供給装置において、前記外周面側油路の鉛直方向下部における前記径方向の幅は、前記外周面側油路の鉛直方向上部における前記径方向の幅よりも小さいことが好ましい。   In the lubricating oil supply apparatus, it is preferable that the radial width at the lower portion in the vertical direction of the outer peripheral surface side oil passage is smaller than the radial width at the upper portion in the vertical direction of the outer peripheral surface side oil passage.

上記潤滑油供給装置において、前記外周面側油路の前記径方向の幅は、前記ギアの回転による潤滑油の流れ方向に沿って鉛直方向上方へ向かうに従い増加し、前記側面側油路の前記軸方向の幅は、前記外周面側油路の前記径方向の幅の増加に応じて減少することが好ましい。   In the lubricating oil supply apparatus, the radial width of the outer peripheral surface side oil passage increases in the vertical direction along the flow direction of the lubricating oil due to the rotation of the gear, It is preferable that the axial width decreases with an increase in the radial width of the outer peripheral surface side oil passage.

本発明に係る潤滑油供給装置は、ケース内に配置され、回転によって貯留部の潤滑油を送るギアと、ケースとギアの外周との間に形成され、ギアの回転によって送られる潤滑油を鉛直方向上方に導く油路と、を備える。油路は、ギアの側面とケースとの間のギアの軸方向の隙間である側面側油路と、ギアの外周面とケースとの間のギアの径方向の隙間である外周面側油路とを有し、外周面側油路の径方向の幅が小さい箇所では、外周面側油路の径方向の幅が大きい箇所よりも、側面側油路の軸方向の幅が大きい。よって、本発明に係る潤滑油供給装置によれば、ギアの回転によって潤滑油を鉛直方向上方に送る能力を向上させることができるという効果を奏する。   The lubricating oil supply device according to the present invention is arranged in a case, and is formed between a gear that sends lubricating oil in a reservoir by rotation and the case and the outer periphery of the gear, and the lubricating oil that is sent by rotation of the gear is vertically And an oil passage leading upward in the direction. The oil passage is a side oil passage that is a gap in the axial direction of the gear between the side surface of the gear and the case, and an outer oil passage that is a gap in the radial direction of the gear between the outer periphery of the gear and the case. And the width in the axial direction of the side oil passage is larger than that in the portion where the radial width of the outer oil passage is large. Therefore, according to the lubricating oil supply apparatus which concerns on this invention, there exists an effect that the capability to send lubricating oil to a perpendicular direction upper direction by rotation of a gear can be improved.

図１は、実施形態に係る動力伝達装置の要部を示す正面図である。FIG. 1 is a front view illustrating a main part of the power transmission device according to the embodiment. 図２は、デフリングギアの下部における油路の断面図である。FIG. 2 is a cross-sectional view of the oil passage at the lower portion of the diff ring gear. 図３は、デフリングギアの後部における油路の断面図である。FIG. 3 is a cross-sectional view of the oil passage at the rear portion of the diff ring gear. 図４は、油路の流路断面積の説明図である。FIG. 4 is an explanatory diagram of the cross-sectional area of the oil passage. 図５は、外周面側油路の径方向の幅が小さい油路における潤滑油の流れの説明図である。FIG. 5 is an explanatory view of the flow of the lubricating oil in the oil passage having a small radial width of the outer peripheral surface side oil passage. 図６は、外周面側油路の径方向の幅が小さい油路の断面図である。FIG. 6 is a cross-sectional view of the oil passage having a small radial width of the outer peripheral surface side oil passage. 図７は、側面側油路の軸方向の幅が大きい油路における潤滑油の流れの説明図である。FIG. 7 is an explanatory diagram of the flow of the lubricating oil in the oil passage having a large axial width of the side oil passage. 図８は、側面側油路の軸方向の幅が大きい油路の断面図である。FIG. 8 is a cross-sectional view of an oil passage having a large width in the axial direction of the side oil passage.

以下に、本発明の実施形態に係る潤滑油供給装置につき図面を参照しつつ詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記の実施形態における構成要素には、当業者が容易に想定できるものあるいは実質的に同一のものが含まれる。   Hereinafter, a lubricating oil supply apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

［実施形態］
図１から図８を参照して、実施形態について説明する。本実施形態は、潤滑油供給装置に関する。図１は、実施形態に係る動力伝達装置の要部を示す正面図、図２は、デフリングギアの下部における油路の断面図、図３は、デフリングギアの後部における油路の断面図である。 [Embodiment]
The embodiment will be described with reference to FIGS. 1 to 8. The present embodiment relates to a lubricating oil supply apparatus. 1 is a front view showing a main part of a power transmission device according to an embodiment, FIG. 2 is a cross-sectional view of an oil passage at a lower portion of a diff ring gear, and FIG. 3 is a cross-sectional view of an oil passage at a rear portion of the def ring gear. .

図１において、符号１は、動力伝達装置を示す。動力伝達装置１は、例えば、ハイブリッド車両に搭載されるものである。動力伝達装置１のケース２内には、潤滑油（例えば、ＡＴＦ）を貯留する貯留部３が形成されている。貯留部３は、ケース２内における下部に配置されている。また、ケース２内には、デフリングギア４が配置されている。デフリングギア４は、図示しない差動機構を介してハイブリッド車両の左右の駆動輪と接続されている。デフリングギア４は、駆動輪の回転と連動して回転するギアである。デフリングギア４は、回転によって貯留部３の潤滑油を送る。   In FIG. 1, the code | symbol 1 shows a power transmission device. The power transmission device 1 is mounted on, for example, a hybrid vehicle. In the case 2 of the power transmission device 1, a storage part 3 for storing lubricating oil (for example, ATF) is formed. The storage part 3 is arranged in the lower part in the case 2. A diff ring gear 4 is disposed in the case 2. The diff ring gear 4 is connected to the left and right drive wheels of the hybrid vehicle via a differential mechanism (not shown). The diff ring gear 4 is a gear that rotates in conjunction with the rotation of the drive wheel. The diff ring gear 4 feeds the lubricating oil in the reservoir 3 by rotation.

デフリングギア４には、ハイブリッド車両の動力源であるエンジンやモータジェネレータの出力する動力が入力される。デフリングギア４に入力された動力は、駆動輪に伝達されてハイブリッド車両を走行させる。   The diff ring gear 4 receives power output from an engine or motor generator that is a power source of the hybrid vehicle. The power input to the diff ring gear 4 is transmitted to the drive wheels to drive the hybrid vehicle.

動力伝達装置１では、潤滑油供給装置１−１によって各部に潤滑油が供給される。潤滑油供給装置１−１は、ケース２、貯留部３、デフリングギア４および油路５を備える。   In the power transmission device 1, the lubricating oil is supplied to each part by the lubricating oil supply device 1-1. The lubricating oil supply device 1-1 includes a case 2, a storage unit 3, a diffring gear 4, and an oil passage 5.

デフリングギア４は、ケース２内における鉛直方向の下部でかつ車両前後方向の後側に配置されている。貯留部３に潤滑油が貯留されると、デフリングギア４の少なくとも一部、例えばデフリングギア４の下部がその潤滑油に浸かる。矢印Ｙ１は、ハイブリッド車両の前進時におけるデフリングギア４の回転方向を示す。デフリングギア４は、ハイブリッド車両の前進時において、鉛直方向下側の部分が車両後側に向けて移動する回転方向に回転する。デフリングギア４は、外歯歯車であり、周方向に連続的に形成された複数の歯を有している。   The diff ring gear 4 is disposed in the lower part of the case 2 in the vertical direction and on the rear side in the vehicle front-rear direction. When the lubricating oil is stored in the storage part 3, at least a part of the diffring gear 4, for example, the lower part of the diffring gear 4 is immersed in the lubricating oil. An arrow Y1 indicates the rotation direction of the diff ring gear 4 when the hybrid vehicle moves forward. When the hybrid vehicle moves forward, the diff ring gear 4 rotates in a rotational direction in which a lower portion in the vertical direction moves toward the rear side of the vehicle. The diff ring gear 4 is an external gear, and has a plurality of teeth formed continuously in the circumferential direction.

なお、本明細書では、特に記載のない限り「軸方向」とはデフリングギア４の軸方向を示し、「径方向」とはデフリングギア４の中心軸線と直交する径方向を示し、「周方向」とはデフリングギア４の中心軸線を回転中心とする周方向を示すものとする。   In the present specification, unless otherwise specified, “axial direction” indicates the axial direction of the diffring gear 4, “radial direction” indicates the radial direction orthogonal to the central axis of the diffring gear 4, and “circumferential direction” "Indicates the circumferential direction with the central axis of the diffring gear 4 as the center of rotation.

デフリングギア４は、ハイブリッド車両の走行時に駆動輪の回転と連動して回転して貯留部３の潤滑油を送り出す。デフリングギア４によって送られる潤滑油は、油路５を介して鉛直方向上方に送られる。   The diff ring gear 4 rotates in conjunction with the rotation of the drive wheel when the hybrid vehicle travels, and sends out the lubricating oil in the reservoir 3. The lubricating oil sent by the diffring gear 4 is sent upward in the vertical direction via the oil passage 5.

油路５は、ケース２とデフリングギア４の外周との間に形成され、デフリングギア４の回転によって送られる潤滑油を鉛直方向上方に導く。油路５は、図２および図３に示すように、側面側油路５１（５１Ｌ，５１Ｒ）および外周面側油路５２を有する。側面側油路５１は、デフリングギア４の側面４ｂとケース２との間の軸方向の隙間である。側面側油路５１は、デフリングギア４に対して軸方向の両側に形成されている。側面側油路５１は、デフリングギア４に対して車両左側に形成された左側油路５１Ｌと車両右側に形成された右側油路５１Ｒとを有する。   The oil passage 5 is formed between the case 2 and the outer periphery of the diff ring gear 4, and guides the lubricating oil sent by the rotation of the diff ring gear 4 upward in the vertical direction. 2 and 3, the oil passage 5 has a side oil passage 51 (51L, 51R) and an outer peripheral oil passage 52. As shown in FIG. The side oil passage 51 is an axial gap between the side surface 4 b of the diff ring gear 4 and the case 2. The side oil passages 51 are formed on both sides of the differential ring gear 4 in the axial direction. The side oil passage 51 has a left oil passage 51L formed on the left side of the vehicle with respect to the diff ring gear 4 and a right oil passage 51R formed on the right side of the vehicle.

外周面側油路５２は、デフリングギア４の外周面４ａとケース２との間の径方向の隙間である。ここで、外周面４ａとは、例えば、デフリングギア４の最外周、すなわちデフリングギア４の歯先をつなぐ面である。このように、ケース２は、デフリングギア４の外周を径方向外側および軸方向の両側から覆っており、デフリングギア４の外周との間に潤滑油の油路５を形成している。   The outer peripheral surface side oil passage 52 is a radial gap between the outer peripheral surface 4 a of the diff ring gear 4 and the case 2. Here, the outer peripheral surface 4 a is, for example, the outermost outer periphery of the diff ring gear 4, that is, the surface that connects the tooth tips of the diff ring gear 4. As described above, the case 2 covers the outer periphery of the diff ring gear 4 from the radially outer side and the both sides in the axial direction, and forms an oil passage 5 for lubricating oil between the outer periphery of the diff ring gear 4.

図１に示すように、ケース２は、デフリングギア４の外周面４ａと対向する下部内壁面２１および鉛直方向に略直線状に延在する上部内壁面２２を有する。下部内壁面２１および上部内壁面２２は、ケース２における車両後側の内壁面であり、デフリングギア４の径方向と交差する壁面である。下部内壁面２１は、外周面４ａと対応する形状に湾曲している。すなわち、下部内壁面２１は、径方向外側に向けて凹むように湾曲した形状を有している。下部内壁面２１は、外周面４ａにおける鉛直方向の下端と対向する位置から外周面４ａにおける車両後側の端部と対向する位置まで外周面４ａに沿って延在している。また、上部内壁面２２は、外周面４ａにおける車両後側の端部と対向する位置から鉛直方向上方に向けて延在している。   As shown in FIG. 1, the case 2 has a lower inner wall surface 21 that faces the outer peripheral surface 4 a of the diffring gear 4 and an upper inner wall surface 22 that extends substantially linearly in the vertical direction. The lower inner wall surface 21 and the upper inner wall surface 22 are inner wall surfaces on the vehicle rear side in the case 2, and are wall surfaces that intersect the radial direction of the diffring gear 4. The lower inner wall surface 21 is curved into a shape corresponding to the outer peripheral surface 4a. That is, the lower inner wall surface 21 has a curved shape so as to be recessed outward in the radial direction. The lower inner wall surface 21 extends along the outer peripheral surface 4a from a position facing the lower end of the outer peripheral surface 4a in the vertical direction to a position facing the rear end portion of the outer peripheral surface 4a. Further, the upper inner wall surface 22 extends upward in the vertical direction from a position facing the rear end portion of the vehicle on the outer peripheral surface 4a.

車両の前進時にデフリングギア４が回転すると、貯留部３の潤滑油がデフリングギア４の回転によって送られ、油路５によって鉛直方向上方に導かれる。このようにデフリングギア４の回転により掻き揚げられる潤滑油は、動力伝達装置の各部に供給される。例えば、デフリングギア４の鉛直方向上方にオイル受け部が設けられ、掻き揚げられる潤滑油がこのオイル受け部に流入するようにしてもよい。オイル受け部に流入した潤滑油は、モータジェネレータや各ギアなどの被潤滑部に供給されて潤滑・冷却を行う。   When the diff ring gear 4 rotates when the vehicle moves forward, the lubricating oil in the reservoir 3 is sent by the rotation of the diff ring gear 4 and guided upward in the vertical direction by the oil passage 5. Thus, the lubricating oil that is swept up by the rotation of the diff ring gear 4 is supplied to each part of the power transmission device. For example, an oil receiving portion may be provided above the diff ring gear 4 in the vertical direction, and the lubricating oil to be lifted may flow into the oil receiving portion. Lubricating oil that has flowed into the oil receiving portion is supplied to lubricated portions such as a motor generator and gears for lubrication and cooling.

ここで、デフリングギア４等のギアによる潤滑油の掻き揚げ方法では、デフリングギア４の歯先とケース２との隙間の大きさが掻き揚げ性能にとって重要な因子である。デフリングギア４の外周面４ａ（歯先）とケース２の下部内壁面２１との隙間の径方向の幅（以下、単に「外周面側油路５２の径方向の幅Ｇｒ」とも記載する。）が小さいと、外周面側油路５２を流れる潤滑油の流量が制限され、十分な掻き揚げ性能を確保しにくくなる。図５は、外周面側油路５２の径方向の幅Ｇｒが小さい油路５における潤滑油の流れの説明図、図６は、外周面側油路５２の径方向の幅Ｇｒが小さい油路５の断面図である。図６は、例えば、デフリングギア４の下部における油路の断面図である。   Here, in the method of scraping the lubricating oil using a gear such as the diff ring gear 4, the size of the gap between the tooth tip of the diff ring gear 4 and the case 2 is an important factor for the scraping performance. The radial width of the gap between the outer peripheral surface 4a (tooth tip) of the diff ring gear 4 and the lower inner wall surface 21 of the case 2 (hereinafter also simply referred to as “the radial width Gr of the outer peripheral surface side oil passage 52”). Is small, the flow rate of the lubricating oil flowing through the outer peripheral surface side oil passage 52 is limited, and it becomes difficult to ensure sufficient scooping performance. FIG. 5 is an explanatory view of the flow of lubricating oil in the oil passage 5 in which the radial width Gr of the outer peripheral surface side oil passage 52 is small, and FIG. 6 is an oil passage in which the radial width Gr of the outer peripheral surface side oil passage 52 is small. FIG. FIG. 6 is a cross-sectional view of the oil passage in the lower portion of the diff ring gear 4, for example.

貯留部３から油路５に流入する潤滑油（Ｙ１１）の流量は、油路５の流路断面積に応じて決まる。外周面側油路５２の径方向の幅Ｇｒが小さく、油路５の流路断面積が小さい場合、貯留部３から油路５に流入する潤滑油量が制限されてしまう。例えば、油路５におけるデフリングギア４の回転方向に沿った流れ方向の上流側、すなわち貯留部３から油路５への入口部分の流路断面積が小さいと、入口部分がボトルネックとなり、デフリングギア４によって掻き揚げられる潤滑油の流量が少なくなってしまう。   The flow rate of the lubricating oil (Y11) flowing into the oil passage 5 from the reservoir 3 is determined according to the flow path cross-sectional area of the oil passage 5. When the radial width Gr of the outer peripheral surface side oil passage 52 is small and the flow passage cross-sectional area of the oil passage 5 is small, the amount of lubricating oil flowing into the oil passage 5 from the reservoir 3 is limited. For example, if the flow path cross-sectional area of the inlet portion from the reservoir 3 to the oil passage 5 is small in the flow direction along the rotational direction of the defring gear 4 in the oil passage 5, that is, the inlet portion becomes a bottleneck, The flow rate of the lubricating oil swept up by the gear 4 is reduced.

これに対して、外周面側油路５２の径方向の幅Ｇｒを大きくすれば、外周面側油路５２を流れる潤滑油の流量を増加させ、掻き揚げ性能を向上させることが可能である。しかしながら、外周面側油路５２の径方向の幅Ｇｒを大きくしようとした場合、地上高の制約を受ける。地面からケース２の最下面までの高さＨ（図１参照）を確保しつつデフリングギア４の下方における外周面側油路５２の径方向の幅Ｇｒを大きくしようとする場合、デフリングギア４をその分だけ上方に配置する方法や、デフリングギア４の径を小さくする方法がある。   On the other hand, if the radial width Gr of the outer peripheral surface side oil passage 52 is increased, the flow rate of the lubricating oil flowing through the outer peripheral surface side oil passage 52 can be increased, and the lifting performance can be improved. However, when attempting to increase the radial width Gr of the outer circumferential surface side oil passage 52, the ground height is restricted. In order to increase the radial width Gr of the outer peripheral side oil passage 52 below the diff ring gear 4 while ensuring the height H (see FIG. 1) from the ground to the lowermost surface of the case 2, the def ring gear 4 is There are a method of arranging the upper portion by that amount and a method of reducing the diameter of the diff ring gear 4.

しかしながら、デフリングギア４のギア軸、言い換えるとデフリングギア４の中心軸線を上方に配置すると、動力伝達装置１の他の軸の配置成立性が困難になるといった問題がある。また、デフリングギア４の径を小さくすると、必要なギア比が確保できなくなるという問題がある。このように、デフリングギア４の回転によって送られる潤滑油量を増加させる観点からは外周面側油路５２の径方向の幅Ｇｒを大きくすることが好ましいものの、最低地上高の確保などのスペースの制約等によってデフリングギア４の径方向外側に十分な隙間を設けることができない領域が生じる場合がある。   However, when the gear shaft of the diff ring gear 4, in other words, the central axis of the diff ring gear 4 is arranged upward, there is a problem that it is difficult to establish the arrangement of the other shafts of the power transmission device 1. Further, when the diameter of the diff ring gear 4 is reduced, there is a problem that a necessary gear ratio cannot be ensured. Thus, although it is preferable to increase the radial width Gr of the outer peripheral surface side oil passage 52 from the viewpoint of increasing the amount of lubricating oil sent by the rotation of the diff ring gear 4, the space for securing the minimum ground clearance is reduced. There may be a region where a sufficient gap cannot be provided on the radially outer side of the diff ring gear 4 due to restrictions or the like.

ギアの回転によって鉛直方向上方に潤滑油を送る能力を向上できることが望まれている。例えば、ギアの外周面における周方向の一部の領域において、外周面よりも径方向の外側に十分な隙間を確保できない領域があったとしても、ギアの回転によって鉛直方向上方に潤滑油を送る能力を向上できることが望ましい。   It is desired to be able to improve the ability to send lubricating oil vertically upward by the rotation of the gear. For example, even in a region in the circumferential direction on the outer circumferential surface of the gear, even if there is a region where a sufficient gap cannot be secured radially outside the outer circumferential surface, the lubricating oil is sent upward in the vertical direction by the rotation of the gear. It is desirable to be able to improve ability.

ここで、鉛直方向上方に適量の潤滑油を送るために必要となる油路５の流路断面積を確保する方法として、側面側油路５１の軸方向の幅Ｇｗを拡大することが考えられる。図７は、側面側油路５１の軸方向の幅Ｇｗが大きい油路５における潤滑油の流れの説明図、図８は、側面側油路５１の軸方向の幅Ｇｗが大きい油路５の断面図である。   Here, as a method for securing the flow passage cross-sectional area of the oil passage 5 necessary for feeding an appropriate amount of lubricating oil upward in the vertical direction, it is conceivable to increase the axial width Gw of the side oil passage 51. . FIG. 7 is an explanatory diagram of the flow of the lubricating oil in the oil passage 5 in which the axial width Gw of the side oil passage 51 is large. FIG. 8 is a diagram of the oil passage 5 in which the axial width Gw of the side oil passage 51 is large. It is sectional drawing.

側面側油路５１の軸方向の幅Ｇｗを大きくした場合、矢印Ｙ１２で示すデフリングギア４の側面を流れる潤滑油の流れの流量が増加する。これにより、デフリングギア４の回転によって鉛直方向上方に送られる潤滑油量が増加する。しかしながら、側面側油路５１を流れる潤滑油の流速は、外周面側油路５２を流れる潤滑油の流速よりも低速である。このため、デフリングギア４の側面を通過して掻き揚げられる潤滑油が到達できる鉛直方向の高さは、外周面側油路５２を介して掻き揚げられる潤滑油が到達できる高さよりも低くなる。つまり、側面側油路５１の軸方向の幅Ｇｗを単純に大きくした場合、側面側油路５１を通過して送り出される潤滑油の流量は多くなるものの、到達高さが十分ではない。従って、側面側油路５１の軸方向の幅Ｇｗを単に大きくするだけでは、デフリングギア４の回転によって鉛直方向上方に潤滑油を送る能力を向上させられない。   When the axial width Gw of the side oil passage 51 is increased, the flow rate of the lubricating oil flowing on the side surface of the diffring gear 4 indicated by the arrow Y12 increases. As a result, the amount of lubricating oil sent upward in the vertical direction is increased by the rotation of the diff ring gear 4. However, the flow rate of the lubricating oil flowing through the side oil passage 51 is lower than that of the lubricating oil flowing through the outer peripheral surface oil passage 52. For this reason, the height in the vertical direction that can be reached by the lubricating oil that is swept up after passing through the side surface of the differential ring gear 4 is lower than the height that can be reached by the lubricating oil that is swept up via the outer peripheral surface side oil passage 52. That is, when the axial width Gw of the side oil passage 51 is simply increased, the flow rate of the lubricating oil sent through the side oil passage 51 is increased, but the reaching height is not sufficient. Therefore, simply increasing the axial width Gw of the side oil passage 51 does not improve the ability to feed the lubricating oil upward in the vertical direction by the rotation of the diffring gear 4.

本実施形態の潤滑油供給装置１−１では、油路５の形状は、デフリングギア４による掻き揚げ性能を落とすことなく、歯先とケース２との隙間を小さくし、かつ地上高において有利となる形状である。具体的には、以下に図２および図３を参照して説明するように、外周面側油路５２の径方向の幅Ｇｒが小さい箇所では、径方向の幅Ｇｒが大きい箇所よりも、側面側油路５１の軸方向の幅Ｇｗが大きい。言い換えると、デフリングギア４の側面４ｂとケース２との隙間Ｇｗが小さくなるにつれてデフリングギア４の歯先とケース２との隙間Ｇｒが大きくなる。   In the lubricating oil supply device 1-1 of the present embodiment, the shape of the oil passage 5 is advantageous in reducing the clearance between the tooth tip and the case 2 without reducing the scraping performance by the diffring gear 4, and in ground clearance. This is the shape. Specifically, as will be described below with reference to FIGS. 2 and 3, the side surface of the outer peripheral surface side oil passage 52 where the radial width Gr is small is larger than the side surface where the radial width Gr is large. The axial width Gw of the side oil passage 51 is large. In other words, as the gap Gw between the side surface 4b of the diff ring gear 4 and the case 2 decreases, the gap Gr between the tooth tip of the diff ring gear 4 and the case 2 increases.

図２に示すように、デフリングギア４の下端の近傍では、外周面側油路５２の径方向の幅Ｇｒが小さく、側面側油路５１の軸方向の幅Ｇｗが大きい。例えば、外周面側油路５２の径方向の幅Ｇｒは、デフリングギア４の下端において最小とされ、側面側油路５１の軸方向の幅Ｇｗは、デフリングギア４の下端において最大とされる。   As shown in FIG. 2, in the vicinity of the lower end of the diff ring gear 4, the radial width Gr of the outer peripheral surface side oil passage 52 is small and the axial width Gw of the side surface side oil passage 51 is large. For example, the radial width Gr of the outer circumferential surface side oil passage 52 is minimized at the lower end of the diffring gear 4, and the axial width Gw of the side surface side oil passage 51 is maximized at the lower end of the diffring gear 4.

一方、図３に示すように、デフリングギア４の車両後側の端部近傍では、外周面側油路５２の径方向の幅Ｇｒが大きく、側面側油路５１の軸方向の幅Ｇｗが小さい。例えば、外周面側油路５２の径方向の幅Ｇｒは、デフリングギア４の後端において最大とされ、側面側油路５１の軸方向の幅Ｇｗは、デフリングギア４の後端において最小とされる。   On the other hand, as shown in FIG. 3, the radial width Gr of the outer circumferential surface side oil passage 52 is large and the axial width Gw of the side surface side oil passage 51 is small near the vehicle rear side end portion of the diffring gear 4. . For example, the radial width Gr of the outer circumferential surface side oil passage 52 is maximized at the rear end of the diffring gear 4, and the axial width Gw of the side surface side oil passage 51 is minimized at the rear end of the diffring gear 4. The

このように、本実施形態の潤滑油供給装置１−１では、外周面側油路５２の鉛直方向下部における径方向の幅Ｇｒは、外周面側油路５２の鉛直方向上部における径方向の幅Ｇｒよりも小さい。鉛直方向下部における外周面側油路５２の径方向の幅Ｇｒが小さくされていることで、ケース２の最低地上高を設定する際の自由度が増すという利点や、動力伝達装置１内における軸配置の自由度が増すという利点がある。また、油路５における鉛直方向の下部では、外周面側油路５２の径方向の幅Ｇｒが小さくされたことに対応して側面側油路５１の軸方向の幅Ｇｗが大きくされていることで、油路５の流路断面積が適切に確保されている。これにより、油路５によって鉛直方向上方に導かれる潤滑油量を確保して、デフリングギア４の回転によって潤滑油を鉛直方向上方に送る能力を向上させることができる。   As described above, in the lubricating oil supply device 1-1 of the present embodiment, the radial width Gr at the lower portion in the vertical direction of the outer peripheral surface side oil passage 52 is the radial width at the upper portion in the vertical direction of the outer peripheral surface side oil passage 52. Smaller than Gr. Since the radial width Gr of the outer peripheral surface side oil passage 52 in the lower part in the vertical direction is reduced, the advantage that the degree of freedom in setting the minimum ground clearance of the case 2 is increased, and the shaft in the power transmission device 1 is increased. There is an advantage that the degree of freedom of arrangement increases. Further, in the lower part of the oil passage 5 in the vertical direction, the axial width Gw of the side oil passage 51 is increased correspondingly to the reduction in the radial width Gr of the outer peripheral oil passage 52. Thus, the cross-sectional area of the oil passage 5 is ensured appropriately. Thereby, the amount of lubricating oil guided upward in the vertical direction by the oil passage 5 can be secured, and the ability to send the lubricating oil upward in the vertical direction by the rotation of the diffring gear 4 can be improved.

なお、図２に示す位置と図３に示す位置との間、すなわちデフリング４の下端と後端との間では、油路５の径方向の幅Ｇｒおよび軸方向の幅Ｇｗが徐々に変化している。外周面側油路５２の径方向の幅Ｇｒは、デフリングギア４の下端から後端に向かうに従い増加している。言い換えると、外周面側油路５２の径方向の幅Ｇｒは、デフリングギア４の回転による潤滑油の流れ方向に沿って鉛直方向上方へ向かうに従い増加する。   Note that the radial width Gr and the axial width Gw of the oil passage 5 gradually change between the position shown in FIG. 2 and the position shown in FIG. 3, that is, between the lower end and the rear end of the diff ring 4. ing. The radial width Gr of the outer peripheral surface side oil passage 52 increases from the lower end of the diff ring gear 4 toward the rear end. In other words, the radial width Gr of the outer peripheral surface side oil passage 52 increases as it goes upward in the vertical direction along the flow direction of the lubricating oil by the rotation of the diffring gear 4.

一方、側面側油路５１の軸方向の幅Ｇｗは、デフリングギア４の下端から後端に向かうに従い減少している。言い換えると、側面側油路５１の軸方向の幅Ｇｗは、デフリングギア４の回転による潤滑油の流れ方向に沿って鉛直方向上方へ向かうに従い減少する。また、側面側油路５１の軸方向の幅Ｇｗは、外周面側油路５２の径方向の幅Ｇｒの増加に応じて減少する。ここで、幅Ｇｒの増加に応じて幅Ｇｗが減少するとは、例えば、以下のような幅Ｇｒと幅Ｇｗとの関係を含んでいる。   On the other hand, the axial width Gw of the side oil passage 51 decreases as it goes from the lower end of the diff ring gear 4 toward the rear end. In other words, the axial width Gw of the side oil passage 51 decreases as it goes upward in the vertical direction along the flow direction of the lubricating oil by the rotation of the diffring gear 4. Further, the axial width Gw of the side oil passage 51 decreases as the radial width Gr of the outer peripheral oil passage 52 increases. Here, the decrease in the width Gw according to the increase in the width Gr includes, for example, the following relationship between the width Gr and the width Gw.

（１）外周面側油路５２の径方向の幅Ｇｒの増加量と側面側油路５１の軸方向の幅Ｇｗの減少量とが等しくなるように幅Ｇｒ，Ｇｗがそれぞれ変化する。
（２）外周面側油路５２の径方向の幅Ｇｒの増加量に対して一定の割合で側面側油路５１の軸方向の幅Ｇｗが減少するように幅Ｇｒ，Ｇｗがそれぞれ変化する。
（３）外周面側油路５２の流路断面積の増加量と側面側油路５１の流路断面積の減少量とが等しくなるように幅Ｇｒ，Ｇｗがそれぞれ変化する。
（４）外周面側油路５２の流路断面積の増加量に対して、一定の割合で側面側油路５１の流路断面積が減少するように幅Ｇｒ，Ｇｗがそれぞれ変化する。 (1) The widths Gr and Gw change so that the amount of increase in the radial width Gr of the outer peripheral surface side oil passage 52 is equal to the amount of decrease in the axial width Gw of the side surface oil passage 51.
(2) The widths Gr and Gw change so that the axial width Gw of the side oil passage 51 decreases at a constant rate with respect to the increase in the radial width Gr of the outer circumferential oil passage 52.
(3) The widths Gr and Gw change so that the amount of increase in the cross-sectional area of the outer peripheral surface side oil passage 52 and the amount of decrease in the cross-sectional area of the side surface oil passage 51 become equal.
(4) The widths Gr and Gw respectively change so that the flow passage cross-sectional area of the side oil passage 51 decreases at a constant rate with respect to the increase in the flow passage cross-sectional area of the outer peripheral oil passage 52.

図４は、油路５の流路断面積の説明図である。側面側油路５１の流路断面積Ａ１は、図４に示すように、デフリングギア４の側面４ｂとケース２との間の軸方向の隙間の断面積である。また、外周面側油路５２の流路断面積Ａ２は、デフリングギア４の外周面４ａとケース２との間の径方向の隙間の断面積である。なお、符号Ａ３で示す流路断面積、すなわちデフリングギア４の外周面４ａよりも径方向外側でかつ軸方向における外周面４ａの範囲外の領域の流路断面積は、側面側油路５１の流路断面積Ａ１に含めても、外周面側油路５２の流路断面積Ａ２に含めてもよい。   FIG. 4 is an explanatory diagram of the flow path cross-sectional area of the oil path 5. The flow passage cross-sectional area A1 of the side oil passage 51 is the cross-sectional area of the axial gap between the side surface 4b of the diff ring gear 4 and the case 2 as shown in FIG. The flow passage cross-sectional area A <b> 2 of the outer peripheral surface side oil passage 52 is a cross-sectional area of a radial gap between the outer peripheral surface 4 a of the diffring gear 4 and the case 2. The cross-sectional area of the flow path indicated by reference numeral A3, that is, the cross-sectional area of the flow path in the region radially outside the outer peripheral surface 4a of the diff ring gear 4 and outside the range of the outer peripheral surface 4a in the axial direction is It may be included in the channel cross-sectional area A1 or in the channel cross-sectional area A2 of the outer peripheral surface side oil passage 52.

本実施形態では、図１に示す破線６よりも鉛直方向下側の領域では、破線６よりも鉛直方向上側の領域よりも側面側油路５１の軸方向の幅Ｇｗが拡大されている。これは、必要とされる最低地上高等に基づいて破線６よりも下側における外周面側油路５２の径方向の幅Ｇｒが小さくされていることに対応している。   In the present embodiment, in the region on the lower side in the vertical direction than the broken line 6 shown in FIG. 1, the width Gw in the axial direction of the side oil passage 51 is larger than the region on the upper side in the vertical direction from the broken line 6. This corresponds to the fact that the radial width Gr of the outer peripheral surface side oil passage 52 below the broken line 6 is made smaller based on the required minimum ground clearance or the like.

破線６よりも鉛直方向上側の領域では、外周面側油路５２の径方向の幅Ｇｒは、被潤滑部に供給する潤滑油の必要流量を通過させるために十分な大きさとされている。例えば、破線６よりも鉛直方向上側の領域では、外周面側油路５２の径方向の幅Ｇｒが一定の幅とされてもよい。この場合、破線６よりも鉛直方向上側の領域では、側面側油路５１の軸方向の幅Ｇｗも一定の幅とすることができる。さらに、破線６よりも鉛直方向上側の領域では、側面側油路５１の軸方向の幅Ｇｗは、部品の寸法誤差等に基づいて最低限必要とされるクリアランスの大きさとされてもよい。なお、外周面側油路５２の径方向の幅Ｇｒを十分に確保して外周面側油路５２の流量を確保するためには、設定可能な範囲で破線６をできるだけ鉛直方向下側の位置とすることが好ましい。   In the region on the upper side in the vertical direction from the broken line 6, the radial width Gr of the outer peripheral surface side oil passage 52 is set large enough to pass the required flow rate of the lubricating oil supplied to the lubrication target portion. For example, in the region above the broken line 6 in the vertical direction, the radial width Gr of the outer peripheral surface side oil passage 52 may be a constant width. In this case, the axial width Gw of the side-side oil passage 51 can also be a constant width in the region above the broken line 6 in the vertical direction. Further, in the region above the broken line 6 in the vertical direction, the axial width Gw of the side oil passage 51 may be the minimum required clearance based on the dimensional error of the parts. In order to secure a sufficient width Gr in the radial direction of the outer peripheral surface side oil passage 52 and ensure the flow rate of the outer peripheral surface side oil passage 52, the broken line 6 is positioned as far as possible in the vertical direction within a settable range. It is preferable that

このように、本実施形態では、外周面側油路５２の径方向の幅Ｇｒを大きく取ることが困難な箇所では、側面側油路５１において軸方向の幅Ｇｗを大きくすることで、油路５の流路断面積を確保している。また、外周面側油路５２の径方向の幅Ｇｒを調節することに対する制約が生じにくい車両後側では、外周面側油路５２において確保すべき潤滑油量に基づいて外周面側油路５２の径方向の幅Ｇｒが設定される。よって、本実施形態の潤滑油供給装置１−１によれば、デフリングギア４による掻き揚げ性能の向上を図ることができる。   As described above, in the present embodiment, in the portion where it is difficult to increase the radial width Gr of the outer peripheral surface side oil passage 52, the oil passage can be obtained by increasing the axial width Gw in the side surface oil passage 51. 5 channel cross-sectional area is secured. Further, on the vehicle rear side where restrictions on adjusting the radial width Gr of the outer peripheral surface side oil passage 52 are unlikely to occur, the outer peripheral surface side oil passage 52 is based on the amount of lubricating oil to be secured in the outer peripheral surface side oil passage 52. The width Gr in the radial direction is set. Therefore, according to the lubricating oil supply device 1-1 of the present embodiment, the lifting performance by the diff ring gear 4 can be improved.

デフリングギア４の回転によって送られる潤滑油は、デフリングギア４の下部では、図１に矢印Ｙ２に示すように、主としてデフリングギア４の側方、すなわち側面側油路５１を通過する。デフリングギア４の下部では、デフリングギア４の回転により送られる潤滑油の流れ方向は、水平方向である。このため、デフリングギア４の側方の潤滑油であっても、デフリングギア４の回転によって十分な流量および流速で送られる。   The lubricating oil sent by the rotation of the diff ring gear 4 mainly passes through the side of the def ring gear 4, that is, the side oil passage 51, as indicated by an arrow Y2 in FIG. In the lower part of the diff ring gear 4, the flow direction of the lubricating oil sent by the rotation of the diff ring gear 4 is a horizontal direction. For this reason, even the lubricating oil on the side of the diff ring gear 4 is sent at a sufficient flow rate and flow velocity by the rotation of the diff ring gear 4.

デフリングギア４の回転によって送られる潤滑油は、矢印Ｙ３に示すように、鉛直方向の上側に向かうに従って、デフリングギア４の側面から外周面側油路５２に移動する。これは、デフリングギア４の回転方向Ｙ１に沿った潤滑油の流れ方向（以下、単に「油路５の流れ方向」とも記載する。）の下流側へ向かうに従い、側面側油路５１の軸方向の幅Ｇｗが減少し、外周面側油路５２の径方向の幅Ｇｒが増加することによる。また、潤滑油は、デフリングギア４の回転によって与えられる遠心力により径方向外側の外周面側油路５２に導かれる。   The lubricating oil sent by the rotation of the diff ring gear 4 moves from the side surface of the diff ring gear 4 to the outer peripheral surface side oil passage 52 as it goes upward in the vertical direction as indicated by an arrow Y3. This is the axial direction of the side oil passage 51 as it goes downstream of the flow direction of the lubricating oil along the rotational direction Y1 of the diffring gear 4 (hereinafter also simply referred to as “flow direction of the oil passage 5”). This is because the width Gw of the outer peripheral surface side oil passage 52 decreases and the radial width Gr of the outer peripheral surface side oil passage 52 increases. Further, the lubricating oil is guided to the radially outer peripheral oil passage 52 by the centrifugal force given by the rotation of the diff ring gear 4.

外周面側油路５２を流れる潤滑油は、デフリングギア４の歯面によって大きな推進力を受け（矢印Ｙ４）、鉛直方向上方に向けて飛び出す（矢印Ｙ５，Ｙ６）。外周面側油路５２における鉛直方向に延在する領域において径方向の幅Ｇｒが十分に確保されていることで、デフリングギア４の回転によって鉛直方向上方に送り出す潤滑油の流量および流速を適切に確保することができる。外周面側油路５２から鉛直方向上側に向けて飛び出す潤滑油の流量は、被潤滑部で必要とされる流量を満たすことができるものである。また、外周面側油路５２から鉛直方向上側に向けて飛び出す潤滑油の流速は、オイル受け部等に到達可能な十分な流速となる。   The lubricating oil flowing in the outer peripheral surface side oil passage 52 receives a large driving force by the tooth surface of the diffring gear 4 (arrow Y4) and jumps upward in the vertical direction (arrows Y5 and Y6). By sufficiently securing the radial width Gr in the region extending in the vertical direction in the outer peripheral surface side oil passage 52, the flow rate and flow velocity of the lubricating oil sent upward in the vertical direction by the rotation of the diffring gear 4 are appropriately set. Can be secured. The flow rate of the lubricating oil that protrudes from the outer peripheral surface side oil passage 52 toward the upper side in the vertical direction can satisfy the flow rate required in the lubricated part. Further, the flow rate of the lubricating oil that protrudes from the outer peripheral surface side oil passage 52 toward the upper side in the vertical direction is a sufficient flow rate that can reach the oil receiving portion and the like.

よって、本実施形態の潤滑油供給装置１−１は、デフリングギア４の回転によって鉛直方向上方に送る潤滑油の流量および流速を適切なものとすることができ、デフリングギア４の回転による鉛直方向上方への潤滑油の供給能力を向上させることができる。   Therefore, the lubricating oil supply apparatus 1-1 of the present embodiment can make the flow rate and flow velocity of the lubricating oil sent upward in the vertical direction by the rotation of the diff ring gear 4 appropriate, and the vertical direction by the rotation of the diff ring gear 4 The ability to supply the lubricating oil upward can be improved.

本実施形態では、デフリングギア４の外周との間に油路５を形成する部材がケース２の内壁面であったが、これに限定されるものではない。例えば、ケース２内に内壁面とは別に油路５を形成する部材が配置されてもよい。油路５を形成する部材は、ケース２に対して固定され、ケース２の一部をなすものである。   In this embodiment, the member that forms the oil passage 5 between the outer periphery of the diff ring gear 4 is the inner wall surface of the case 2, but is not limited thereto. For example, a member that forms the oil passage 5 may be disposed in the case 2 separately from the inner wall surface. The member forming the oil passage 5 is fixed to the case 2 and forms a part of the case 2.

なお、本実施形態の潤滑油供給装置１−１は、ハイブリッド車両の動力伝達装置１に限らず、他の動力伝達装置、例えばＭＴ（手動変速機）の動力伝達装置に適用されてもよい。   In addition, the lubricating oil supply apparatus 1-1 of this embodiment may be applied not only to the power transmission device 1 of a hybrid vehicle but to other power transmission devices, for example, a power transmission device of MT (manual transmission).

上記の実施形態に開示された内容は、適宜組み合わせて実行することができる。   The contents disclosed in the above embodiments can be executed in appropriate combination.

１−１ 潤滑油供給装置
１ 動力伝達装置
２ ケース
３ 貯留部
４ デフリングギア
４ａ 外周面
４ｂ 側面
５ 油路
５１ 側面側油路
５２ 外周面側油路
Ｇｒ 外周面側油路の径方向の幅
Ｇｗ 側面側油路の軸方向の幅 1-1 Lubricating oil supply device 1 Power transmission device 2 Case 3 Storage portion 4 Defring gear 4a Outer peripheral surface 4b Side surface 5 Oil passage 51 Side surface side oil passage 52 Outer surface side oil passage Gr Width in the radial direction Gw Axial width of side oil passage

Claims (3)

ケースと、
前記ケース内に配置され、潤滑油を貯留する貯留部と、
前記ケース内に配置され、回転によって前記貯留部の潤滑油を送るギアと、
前記ケースと前記ギアの外周との間に形成され、前記ギアの回転によって送られる潤滑油を鉛直方向上方に導く油路と、
を備え、
前記油路は、前記ギアの側面と前記ケースとの間の前記ギアの軸方向の隙間である側面側油路と、前記ギアの外周面と前記ケースとの間の前記ギアの径方向の隙間である外周面側油路とを有し、
前記外周面側油路の前記径方向の幅が小さい箇所では、前記外周面側油路の前記径方向の幅が大きい箇所よりも、前記側面側油路の前記軸方向の幅が大きい
ことを特徴とする潤滑油供給装置。 Case and
A storage portion disposed in the case and storing lubricating oil;
A gear that is arranged in the case and sends lubricating oil in the reservoir by rotation;
An oil passage formed between the case and the outer periphery of the gear, and guiding the lubricating oil sent by the rotation of the gear upward in the vertical direction;
With
The oil passage includes a side oil passage which is a gap in the axial direction of the gear between the side surface of the gear and the case, and a radial gap of the gear between the outer peripheral surface of the gear and the case. An outer circumferential surface side oil passage,
Where the outer circumferential surface side oil passage has a small radial width, the side surface side oil passage has a larger axial width than the outer circumferential surface side oil passage having a larger radial width. Lubricating oil supply device characterized. 前記外周面側油路の鉛直方向下部における前記径方向の幅は、前記外周面側油路の鉛直方向上部における前記径方向の幅よりも小さい
請求項１に記載の潤滑油供給装置。 The lubricating oil supply apparatus according to claim 1, wherein a radial width at a lower portion in the vertical direction of the outer peripheral surface side oil passage is smaller than a radial width at an upper portion in the vertical direction of the outer peripheral surface side oil passage. 前記外周面側油路の前記径方向の幅は、前記ギアの回転による潤滑油の流れ方向に沿って鉛直方向上方へ向かうに従い増加し、
前記側面側油路の前記軸方向の幅は、前記外周面側油路の前記径方向の幅の増加に応じて減少する
請求項１または２に記載の潤滑油供給装置。 The radial width of the outer peripheral surface side oil passage increases as it goes upward in the vertical direction along the flow direction of the lubricating oil by the rotation of the gear,
The lubricating oil supply apparatus according to claim 1 or 2, wherein a width in the axial direction of the side surface side oil passage decreases with an increase in a width in the radial direction of the outer peripheral surface side oil passage.
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