JP2020133901A

JP2020133901A - Oil supply unit

Info

Publication number: JP2020133901A
Application number: JP2019233743A
Authority: JP
Inventors: 新深澤; Shin Fukazawa
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2019-02-13
Filing date: 2019-12-25
Publication date: 2020-08-31
Anticipated expiration: 2039-12-25
Also published as: JP7140740B2

Abstract

To provide an oil supply unit which enables easy assembly and is inexpensive.SOLUTION: An oil supply unit includes: a rotary shaft 60 and a shaft part 15 which are provided so as to be rotatable around an axis; a pipe 70 disposed along the axis within shaft passing holes 62, 151; a case 51 supporting the pipe 70; and a partition member 75 provided on an inner peripheral surface of the rotary shaft 60 and defining an annular space between inner peripheral surfaces of the rotary shaft 60 and the shaft part 15 and an outer peripheral surface of the pipe 70 in an axial direction. The partition member 75 has a taper part extending from the inner peripheral surface of the rotary shaft 60 to the radial inner side in the axial direction.SELECTED DRAWING: Figure 1

Description

本発明は、回転軸内の油路を介してオイルを供給するオイル供給ユニットに関する。 The present invention relates to an oil supply unit that supplies oil through an oil passage in a rotating shaft.

この種のオイル供給ユニットを備える装置として、例えば、以下の特許文献１記載の装置が知られている。この特許文献記載の装置に設けられるオイル供給ユニットは、回転軸を軸方向に貫通する貫通孔に配置された管状部材を配置し、管状部材を径方向に貫通する貫通孔および回転軸を径方向に貫通する貫通孔を介して、管状部材の内部から回転軸の周囲に配置された部品にオイルを供給するように構成される。 As an apparatus including this type of oil supply unit, for example, the apparatus described in Patent Document 1 below is known. In the oil supply unit provided in the device described in this patent document, a tubular member arranged in a through hole penetrating the rotary shaft in the axial direction is arranged, and the through hole penetrating the tubular member in the radial direction and the rotary shaft are radially through. It is configured to supply oil from the inside of the tubular member to the parts arranged around the rotation axis through the through hole penetrating the.

特開２０１８−１５９３９４号公報JP-A-2018-159394

上記特許文献１記載の装置では、回転軸の周囲に配置された部品に必要十分な量のオイルを供給するため、回転軸を軸方向に貫通する貫通孔をオイルで満たしておく必要がある。そのため、多くの油量が必要となり、ポンプ容量が大型化してコストが上昇するおそれがある。一方、コストの上昇を抑制するためにオイルを供給する部品に対応して回転軸の軸方向貫通孔を軸方向に区画すると、回転軸内に管状部材を配置するときの装置の組立性が低下する。 In the apparatus described in Patent Document 1, in order to supply a necessary and sufficient amount of oil to the parts arranged around the rotating shaft, it is necessary to fill the through holes penetrating the rotating shaft in the axial direction with oil. Therefore, a large amount of oil is required, which may increase the pump capacity and increase the cost. On the other hand, if the axial through hole of the rotating shaft is partitioned in the axial direction corresponding to the part that supplies oil in order to suppress the increase in cost, the assemblability of the device when arranging the tubular member in the rotating shaft is lowered. To do.

本発明の一態様であるオイル供給ユニットは、軸線に沿って延在する貫通軸孔を有するとともに、軸線を中心に回転可能に設けられた軸体と、貫通軸孔の内部に軸線に沿って配置された管部材と、管部材の軸方向端部を支持する支持部材と、軸体の内周面に設けられ、軸体の内周面と管部材の外周面との間の環状空間を軸方向に区画する区画部材と、を備える。管部材および軸体には、管部材の内側に供給されたオイルが環状空間を経由して軸体の径方向外側に流れるように、管部材を貫通する第１貫通孔と軸体を貫通する第２貫通孔とがそれぞれ開口され、区画部材は、軸体の内周面から径方向内側かつ軸方向に向けて延在するテーパー部を有する。 The oil supply unit according to one aspect of the present invention has a through shaft hole extending along the axis, a shaft body rotatably provided around the axis, and the inside of the through shaft hole along the axis. An annular space provided on the inner peripheral surface of the shaft body and between the arranged pipe member, the support member that supports the axial end of the pipe member, and the outer peripheral surface of the shaft body. A partition member for partitioning in the axial direction is provided. The pipe member and the shaft body penetrate through the first through hole penetrating the pipe member and the shaft body so that the oil supplied to the inside of the pipe member flows outward in the radial direction of the shaft body via the annular space. Each of the second through holes is opened, and the partition member has a tapered portion extending radially inward and in the axial direction from the inner peripheral surface of the shaft body.

本発明によれば、組立性が容易で、かつ、安価に構成されたオイル供給ユニットを提供することができる。 According to the present invention, it is possible to provide an oil supply unit that is easy to assemble and is inexpensively configured.

本発明の実施形態に係るオイル供給ユニットの要部構成を示す断面図。The cross-sectional view which shows the main part structure of the oil supply unit which concerns on embodiment of this invention. 図１の要部拡大図。Enlarged view of the main part of FIG. 図１のオイル供給ユニットの要部の寸法を説明する図。The figure explaining the dimension of the main part of the oil supply unit of FIG. 本発明の実施形態に係るオイル供給ユニットの要部に作用する力を説明する図。The figure explaining the force acting on the main part of the oil supply unit which concerns on embodiment of this invention. 図４Ａの比較例を示す図。The figure which shows the comparative example of FIG. 4A. 図１の比較例を示す図。The figure which shows the comparative example of FIG. 図２の変形例を示す図。The figure which shows the modification of FIG.

以下、図１〜図６を参照して本発明の実施形態について説明する。本発明の実施形態に係るオイル供給ユニットは、回転軸内の油路を介して回転軸の周囲に配置された部品にオイルを供給するものである。このオイル供給ユニットは種々の装置に適用することができるが、以下では、特に車両駆動装置にオイル供給ユニットを適用する例を説明する。図１は、本発明の実施形態に係るオイル供給ユニットの要部構成を示す断面図である。なお、以下では、便宜上、図示のように軸方向を左右方向として定義し、この定義に従い各部の構成を説明する。左右方向は、例えば重力に対し直交する方向であり、具体的には車両の幅方向あるいは長さ方向である。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. The oil supply unit according to the embodiment of the present invention supplies oil to parts arranged around the rotary shaft via an oil passage in the rotary shaft. This oil supply unit can be applied to various devices, and an example of applying the oil supply unit to a vehicle drive device will be described below. FIG. 1 is a cross-sectional view showing a main configuration of an oil supply unit according to an embodiment of the present invention. In the following, for convenience, the axial direction is defined as the left-right direction as shown in the figure, and the configuration of each part will be described according to this definition. The left-right direction is, for example, a direction orthogonal to gravity, specifically, a width direction or a length direction of a vehicle.

車両駆動装置は、例えば走行駆動源として電動の走行モータを有する。すなわち、車両駆動装置が搭載される車両は電気自動車であり、走行モータから出力されたトルクは、変速機構および差動機構を介して左右のドライブシャフトに伝達され、これにより車両が走行する。なお、車両駆動装置は、エンジンを駆動源として有する内燃機関車両に用いてもよく、あるいは、エンジンと走行モータとを駆動源として有するハイブリット車両に用いてもよい。 The vehicle drive device has, for example, an electric travel motor as a travel drive source. That is, the vehicle on which the vehicle drive device is mounted is an electric vehicle, and the torque output from the traveling motor is transmitted to the left and right drive shafts via the transmission mechanism and the differential mechanism, whereby the vehicle travels. The vehicle drive device may be used for an internal combustion engine vehicle having an engine as a drive source, or may be used for a hybrid vehicle having an engine and a traveling motor as a drive source.

図１には、走行モータ１の一部が示される。図１に示すように、走行モータ１は、左右方向の軸線ＣＬ１を中心に回転する略円筒形状のロータ１１と、ロータ１１の周囲に配置された不図示のステータとを有する。走行モータ１は、その周囲に配置されたケース５１（一部のみ図示）の内部に収容される。走行モータ１は、例えば埋込磁石同期モータとして構成される。なお、磁石を有しない同期リラクタンスモータやスイッチドリラクタンスモータ等を、走行モータ１として用いることもできる。図示は省略するが、ケース５１の右端面は開口され、この開口部はケースカバー５２（一部のみ図示）により閉塞される。 FIG. 1 shows a part of the traveling motor 1. As shown in FIG. 1, the traveling motor 1 has a substantially cylindrical rotor 11 that rotates about the axis CL1 in the left-right direction, and a stator (not shown) arranged around the rotor 11. The traveling motor 1 is housed inside a case 51 (only a part of which is shown) arranged around the traveling motor 1. The traveling motor 1 is configured as, for example, an embedded magnet synchronous motor. A synchronous reluctance motor, a switch reluctance motor, or the like having no magnet can also be used as the traveling motor 1. Although not shown, the right end surface of the case 51 is opened, and this opening is closed by the case cover 52 (only a part of which is shown).

ロータ１１は、軸線ＣＬ１を中心とした略円筒形状の軸部１５と、軸部１５の外周面に嵌合され、軸部１５と一体に回転するロータコア１６とを有する。ステータは、ロータ１１の外周面から径方向に所定長さのギャップを介して配置された、軸線ＣＬ１を中心とした略円筒形状のステータコアを有する。ステータコアの内周面には径方向外方に向けて周方向複数のスロットが設けられる。各スロットには、集中巻または分布巻により巻線（コイル）が配置され、巻線に三相交流電流を流すことで回転磁界が発生し、ロータ１１が回転する。 The rotor 11 has a substantially cylindrical shaft portion 15 centered on the axis CL1 and a rotor core 16 that is fitted on the outer peripheral surface of the shaft portion 15 and rotates integrally with the shaft portion 15. The stator has a substantially cylindrical stator core centered on the axis CL1 which is arranged from the outer peripheral surface of the rotor 11 in the radial direction through a gap having a predetermined length. A plurality of slots in the circumferential direction are provided on the inner peripheral surface of the stator core in the radial direction and outward. A winding (coil) is arranged in each slot by a concentrated winding or a distributed winding, and a rotating magnetic field is generated by passing a three-phase alternating current through the winding, and the rotor 11 rotates.

ロータ１１の右方には、軸線ＣＬ１を中心とした略円筒形状の回転軸６０が配置される。回転軸６０の左端部の外周面にはスプラインＳＬ１が形成される。スプラインＳＬ１には、ロータ１１の軸部１５の右端部が嵌合（スプライン結合）され、軸部１５と回転軸６０とが一体に回転する。なお、軸部１５と回転軸６０とは、軸線ＣＬ１を中心に回転する軸体を構成する。 A substantially cylindrical rotating shaft 60 centered on the axis CL1 is arranged on the right side of the rotor 11. A spline SL1 is formed on the outer peripheral surface of the left end portion of the rotating shaft 60. The right end of the shaft portion 15 of the rotor 11 is fitted (spline-coupled) to the spline SL1, and the shaft portion 15 and the rotating shaft 60 rotate integrally. The shaft portion 15 and the rotating shaft 60 form a shaft body that rotates around the axis CL1.

回転軸６０の左端部および右端部は、それぞれベアリング３１，３２を介してケース５１およびケースカバー５２から回転可能に支持される。軸部１５の左端部は、ベアリング３３を介してケース５１から回転可能に支持される。軸体の左右方向中央部のベアリング３１は、ロータ１１の軸部１５の右端部に隣接して配置される。 The left end and the right end of the rotating shaft 60 are rotatably supported from the case 51 and the case cover 52 via bearings 31 and 32, respectively. The left end of the shaft 15 is rotatably supported from the case 51 via a bearing 33. The bearing 31 at the center of the shaft in the left-right direction is arranged adjacent to the right end of the shaft 15 of the rotor 11.

回転軸６０の外周面には、ベアリング３１の右方にギヤ６１が形成される。ギヤ６１には、回転軸６０の周囲に配置された回転体６００のギヤ６０１が噛合し、回転軸６０の回転はギヤ６１，６０１を介して回転体６００に出力される。さらに、回転軸６０の外周面には、ギヤ６１の右方にスプラインＳＬ２が形成される。スプラインＳＬ２には、パーキングギヤ３６が嵌合（スプライン結合）され、回転軸６０とパーキングギヤ３６とは一体に回転する。図示は省略するが、パーキングギヤ３６には、ケース５１に揺動可能に支持されたパーキングポールの爪部が係合可能に設けられ、パーキングポールの爪部がパーキングギヤ３６に係合すると、パーキング装置が作動する。 A gear 61 is formed on the outer peripheral surface of the rotating shaft 60 on the right side of the bearing 31. The gear 601 of the rotating body 600 arranged around the rotating shaft 60 meshes with the gear 61, and the rotation of the rotating shaft 60 is output to the rotating body 600 via the gears 61 and 601. Further, a spline SL2 is formed on the outer peripheral surface of the rotating shaft 60 on the right side of the gear 61. A parking gear 36 is fitted to the spline SL2 (spline coupling), and the rotating shaft 60 and the parking gear 36 rotate integrally. Although not shown, the parking gear 36 is provided with a claw portion of a parking pole oscillatingly supported by the case 51 so as to be engaged with the claw portion of the parking pole. The device is activated.

このように構成された車両駆動装置の各部には、油路ＰＡ１，ＰＡ２を介してオイルが供給される。油路ＰＡ１は、ケース５１の左側の側壁５３に沿って径方向に延設され、油路ＰＡ２は、軸部１５および回転軸６０内に、軸線ＣＬ１に沿って左右方向に延設される。油路ＰＡ１は、オイルポンプ２０と連通するとともに、側壁５３を軸線ＣＬ１に沿って貫通する貫通孔５３ａを介して油路ＰＡ２と連通する。これにより、オイルポンプＰから吐出されたオイルが油路ＰＡ１を介して油路ＰＡ２に導かれる。油路ＰＡ２に導かれたオイルは、軸部１５および回転軸６０をそれぞれ径方向に貫通する貫通孔を介して、回転軸６０の周囲に配置されたロータ１１やベアリング３１などの部品に供給される。 Oil is supplied to each part of the vehicle drive device configured in this way via the oil passages PA1 and PA2. The oil passage PA1 extends radially along the side wall 53 on the left side of the case 51, and the oil passage PA2 extends laterally along the axis CL1 in the shaft portion 15 and the rotating shaft 60. The oil passage PA1 communicates with the oil pump 20 and also communicates with the oil passage PA2 through a through hole 53a penetrating the side wall 53 along the axis CL1. As a result, the oil discharged from the oil pump P is guided to the oil passage PA2 via the oil passage PA1. The oil guided to the oil passage PA2 is supplied to parts such as the rotor 11 and the bearing 31 arranged around the rotating shaft 60 through through holes penetrating the shaft portion 15 and the rotating shaft 60 in the radial direction, respectively. To.

回転軸６０には、軸線ＣＬ１を中心とした略円筒形状の貫通孔６２が左右方向全長にわたって開口される。貫通孔６２の左端部は右端部よりも大径であり、貫通孔６２は段付き状に構成される。すなわち、貫通孔６２は、左側の略円筒形状の大径貫通孔６２１と、右側の略円筒形状の小径貫通孔６２２とを有し、大径貫通孔６２１と小径貫通孔６２２とはテーパー面６１３を介して接続される。 A substantially cylindrical through hole 62 centered on the axis CL1 is opened in the rotating shaft 60 over the entire length in the left-right direction. The left end portion of the through hole 62 has a larger diameter than the right end portion, and the through hole 62 is configured in a stepped shape. That is, the through hole 62 has a substantially cylindrical large diameter through hole 621 on the left side and a substantially cylindrical small diameter through hole 622 on the right side, and the large diameter through hole 621 and the small diameter through hole 622 have a tapered surface 613. Connected via.

回転軸６０には、回転軸６０を径方向に貫通する略円形の複数の貫通孔６３が開口される。貫通孔６３は、回転軸６０の周囲に配置されたオイルの供給を必要とする部品の位置に対応して設けられる。例えば、スプラインＳＬ１、ＳＬ２の位置に対応してそれぞれ貫通孔６３（６３Ａ，６３Ｂ）が設けられる。なお、貫通孔６３Ａ，６３Ｂの直径は、互いにほぼ等しく、かつ、貫通孔６２１，６２２の直径よりも小さい。 A plurality of substantially circular through holes 63 penetrating the rotating shaft 60 in the radial direction are opened in the rotating shaft 60. The through hole 63 is provided around the rotating shaft 60 so as to correspond to the position of a component that requires oil supply. For example, through holes 63 (63A, 63B) are provided corresponding to the positions of the splines SL1 and SL2, respectively. The diameters of the through holes 63A and 63B are substantially equal to each other and smaller than the diameters of the through holes 621 and 622.

左側の貫通孔６３Ａを介して回転軸６０の内側から外側に流出したオイルは、スプラインＳＬ１に供給され、スプラインＳＬ１を潤滑する。さらに、貫通孔６３Ａを介して回転軸６０の外側に流出したオイルは、軸部１５と回転軸６０との隙間を介して、あるいは軸部１５を径方向に貫通する貫通孔を介してベアリング３１にも供給され、ベアリング３１を潤滑する。すなわち、左側の貫通孔６３Ａは、主にスプライン潤滑用およびベアリング潤滑用の油路を構成する。一方、右側の貫通孔６３Ｂを介して回転軸６０の内側から外側に流出したオイルは、スプラインＳＬ２に供給され、スプラインＳＬ２を潤滑する。すなわち、左側の貫通孔６３Ｂは、主にスプライン潤滑用の油路を構成する。 The oil flowing out from the inside to the outside of the rotating shaft 60 through the through hole 63A on the left side is supplied to the spline SL1 and lubricates the spline SL1. Further, the oil that has flowed out of the rotating shaft 60 through the through hole 63A is passed through the gap between the shaft portion 15 and the rotating shaft 60, or through the through hole that penetrates the shaft portion 15 in the radial direction. Is also supplied to lubricate the bearing 31. That is, the through hole 63A on the left side mainly constitutes an oil passage for spline lubrication and bearing lubrication. On the other hand, the oil flowing out from the inside to the outside of the rotating shaft 60 through the through hole 63B on the right side is supplied to the spline SL2 and lubricates the spline SL2. That is, the through hole 63B on the left side mainly constitutes an oil passage for spline lubrication.

軸部１５には、軸線ＣＬ１を中心とした略円筒形状の貫通孔１５１が左右方向全長にわたって開口される。軸部１５には、軸部１５を径方向に貫通する略円形の複数の貫通孔１５２が開口される。貫通孔１５２は、軸部１５の周囲に配置されたオイルの供給を必要とする部品の位置に対応して設けられる。例えば、ロータコア１６の左端部およびロータコア１６の中央部の位置に対応してそれぞれ貫通孔１５２（１５２Ｃ，１５２Ｄ）が設けられる。なお、貫通孔１５２Ｃ，１５２Ｄの直径は互いにほぼ等しく、かつ、貫通孔６３Ａ，６３Ｂの直径とほぼ等しい。 A substantially cylindrical through hole 151 centered on the axis CL1 is opened in the shaft portion 15 over the entire length in the left-right direction. The shaft portion 15 is opened with a plurality of substantially circular through holes 152 that penetrate the shaft portion 15 in the radial direction. The through hole 152 is provided so as to correspond to the position of a component that requires oil supply, which is arranged around the shaft portion 15. For example, through holes 152 (152C, 152D) are provided corresponding to the positions of the left end portion of the rotor core 16 and the central portion of the rotor core 16. The diameters of the through holes 152C and 152D are substantially equal to each other, and are substantially equal to the diameters of the through holes 63A and 63B.

左側の貫通孔１５２Ｃを介して軸部１５の内側から外側に流出したオイルは、ロータコア１６の左面に沿って流れ、これによりロータコア１６が冷却される。すなわち、貫通孔１５２Ｃは、主にロータ冷却用の油路を構成する。一方、右側の貫通孔１５２Ｄを介して軸部１５の内側から外側に流出したオイルは、軸部１５とロータコア１６との嵌合面に沿って流れ、これによりロータ１１が冷却される。すなわち、貫通孔１５２Ｄは、主にロータ冷却用の油路を構成する。 The oil that has flowed out from the inside to the outside of the shaft portion 15 through the through hole 152C on the left side flows along the left surface of the rotor core 16, whereby the rotor core 16 is cooled. That is, the through hole 152C mainly constitutes an oil passage for cooling the rotor. On the other hand, the oil that has flowed out from the inside to the outside of the shaft portion 15 through the through hole 152D on the right side flows along the fitting surface between the shaft portion 15 and the rotor core 16, whereby the rotor 11 is cooled. That is, the through hole 152D mainly constitutes an oil passage for cooling the rotor.

回転軸６０の右端面とケースカバー５２との間には軸方向に空隙（連通路）５６が設けられ、回転軸６０の径方向内側の空間（油路ＰＡ２）とベアリング３２とは連通路５６を介して連通する。ベアリング３２には連通路５６を介して油路ＰＡ２からオイルが導かれ、これによりベアリング３２が潤滑される。また、軸部１５の左端面とケース５１との間には軸方向に空隙（連通路）５７が設けられ、軸部１５の径方向内側の空間（油路ＰＡ２）とベアリング３３とは連通路５７を介して連通する。ベアリング３３には連通路５７を介して油路ＰＡ２からオイルが導かれ、これによりベアリング３３が潤滑される。 A gap (communication passage) 56 is provided in the axial direction between the right end surface of the rotating shaft 60 and the case cover 52, and the space (oil passage PA2) inside the rotating shaft 60 in the radial direction and the bearing 32 are connected to the connecting passage 56. Communicate through. Oil is guided from the oil passage PA2 to the bearing 32 via the communication passage 56, whereby the bearing 32 is lubricated. Further, a gap (communication passage) 57 is provided in the axial direction between the left end surface of the shaft portion 15 and the case 51, and the space inside the radial direction of the shaft portion 15 (oil passage PA2) and the bearing 33 are connected passages. Communicate via 57. Oil is guided from the oil passage PA2 to the bearing 33 via the communication passage 57, whereby the bearing 33 is lubricated.

軸体（軸部１５，回転軸６０）の径方向内側の空間（油路ＰＡ２）、すなわち貫通孔６２，１５１には、軸線ＣＬ１を中心とした略円筒形状のパイプ７０が配置される。パイプ７０の内径は、回転軸６０の小径貫通孔６２２よりも小さく、かつ、径方向の貫通孔６３，１５２よりも大きい。また、パイプ７０の肉厚は、軸部１５および回転軸６０の肉厚よりも薄い。パイプ７０は内部に軸線ＣＬ１に沿った油路ＰＡ３を形成する。 A pipe 70 having a substantially cylindrical shape centered on the axis CL1 is arranged in the space (oil passage PA2) inside the shaft body (shaft portion 15, rotating shaft 60) in the radial direction, that is, through holes 62 and 151. The inner diameter of the pipe 70 is smaller than the small diameter through hole 622 of the rotating shaft 60 and larger than the radial through holes 63 and 152. Further, the wall thickness of the pipe 70 is thinner than the wall thickness of the shaft portion 15 and the rotating shaft 60. The pipe 70 internally forms an oil passage PA3 along the axis CL1.

ケース５１の左側の側壁５３の右端面には、軸線ＣＬ１に沿って凹部５８が設けられ、凹部５８にパイプ７０の左端部が圧入または軽圧入により嵌合される。凹部５８の底面は側壁５３の貫通孔５３ａが到達し、これにより左側の油路ＰＡ１が貫通孔５３ａとパイプ７０の左端の開口面とを介してパイプの内部空間（油路ＰＡ３）と連通する。凹部５８の右端部には、パイプ７０の左端部の凹部５８への挿入を案内するように全周にわたってテーパー面５８１が設けられる。 A recess 58 is provided along the axis CL1 on the right end surface of the side wall 53 on the left side of the case 51, and the left end of the pipe 70 is press-fitted or lightly press-fitted into the recess 58. The bottom surface of the recess 58 reaches the through hole 53a of the side wall 53, whereby the oil passage PA1 on the left side communicates with the internal space (oil passage PA3) of the pipe through the through hole 53a and the opening surface at the left end of the pipe 70. .. At the right end of the recess 58, a tapered surface 581 is provided over the entire circumference so as to guide the insertion of the left end of the pipe 70 into the recess 58.

一方、ケースカバー５２の左端面には、軸線ＣＬ１に沿って凹部５９が設けられ、凹部５９にパイプ７０の右端部が圧入または軽圧入により嵌合される。このとき、パイプ７０の内側の油路ＰＡ３の右端面は、ケースカバー５２（凹部５９の底面）により閉塞される。凹部５９の左端部には、パイプ７０の右端部の凹部５９への挿入を案内するように全周にわたってテーパー面５９１が設けられる。 On the other hand, a recess 59 is provided on the left end surface of the case cover 52 along the axis CL1, and the right end portion of the pipe 70 is press-fitted or lightly press-fitted into the recess 59. At this time, the right end surface of the oil passage PA3 inside the pipe 70 is closed by the case cover 52 (bottom surface of the recess 59). At the left end of the recess 59, a tapered surface 591 is provided over the entire circumference so as to guide the insertion of the right end of the pipe 70 into the recess 59.

このように油路ＰＡ２の内側には、パイプ７０が、ケース５１の凹部５８とケースカバー５２の凹部５９との間に挟まれて、軸方向に位置決めされた状態で支持される。したがって、回転軸６０および軸部１５の貫通孔６２，１５１の内の油路ＰＡ２は、軸線ＣＬ１を中心として環状に形成される。すなわち、環状空間ＳＰにより油路ＰＡ２が構成される。 In this way, inside the oil passage PA2, the pipe 70 is sandwiched between the recess 58 of the case 51 and the recess 59 of the case cover 52, and is supported in a state of being positioned in the axial direction. Therefore, the oil passage PA2 in the through holes 62 and 151 of the rotating shaft 60 and the shaft portion 15 is formed in an annular shape around the axis CL1. That is, the oil passage PA2 is formed by the annular space SP.

パイプ７０には、パイプ７０を径方向に貫通する略円形の複数の貫通孔７４が開口される。貫通孔７４は、回転軸６０の貫通孔６３Ａ，６３Ｂの位置にそれぞれ対応する貫通孔７４Ａ，７４Ｂと、軸部１５の貫通孔１５２Ｃ，１５２Ｄの位置にそれぞれ対応する貫通孔７４Ｃ，７４Ｄとを含む。さらに貫通孔７４は、貫通孔７４Ｂの右方かつ凹部５９の左方に開口された、より詳しくは凹部５９の近傍に開口された貫通孔７４Ｅと、貫通孔７４Ｃの左方かつ凹部５８の右方に開口された、より詳しくは凹部５８の近傍に配置された貫通孔７４Ｆとを含む。これら貫通孔７４Ａ〜７４Ｆのうち、右側の貫通孔７４Ａ，７４Ｂ，７４Ｅの径は、左側の貫通孔７４Ｃ，７４Ｄ，７４Ｆの径よりも大きく、貫通孔７４Ａ，７４Ｂ，７４Ｅからは貫通孔７４Ｃ，７４Ｄ，７４Ｆからよりも多くのオイルを流出可能である。 The pipe 70 is opened with a plurality of substantially circular through holes 74 that penetrate the pipe 70 in the radial direction. The through hole 74 includes through holes 74A and 74B corresponding to the positions of the through holes 63A and 63B of the rotating shaft 60, and through holes 74C and 74D corresponding to the positions of the through holes 152C and 152D of the shaft portion 15, respectively. .. Further, the through hole 74 is a through hole 74E opened to the right of the through hole 74B and to the left of the recess 59, more specifically, a through hole 74E opened in the vicinity of the recess 59, and to the left of the through hole 74C and to the right of the recess 58. Includes a through hole 74F that is open in the direction, more specifically located in the vicinity of the recess 58. Of these through holes 74A to 74F, the diameters of the through holes 74A, 74B, 74E on the right side are larger than the diameters of the through holes 74C, 74D, 74F on the left side, and the through holes 74C, 74C, from the through holes 74A, 74B, 74E More oil can flow out of 74D, 74F.

回転軸６０の内周面、すなわち大径貫通孔６２１の周面には区画部材７５が取り付けられる。区画部材７５は、貫通孔６３Ａの左方に配置され、区画部材７５により環状空間ＳＰ（油路ＰＡ２）が左右２つの空間（ＳＰ１，ＳＰ２）に区画される。すなわち、回転軸６０の貫通孔６３Ａ，６３Ｂに面した空間ＳＰ１と軸部１５の貫通孔１５２Ｃ，１５２Ｄに面した空間ＳＰ２とに区画される。すなわち、第１空間ＳＰ１により油路ＰＡ２１が構成され、第２空間ＳＰ２により油路ＰＡ２２が構成される。なお、区画部材７５の取付位置は、回転軸６０の貫通孔６３Ａの左方であればよく、回転軸６０の左端部であってもよい。 A partition member 75 is attached to the inner peripheral surface of the rotating shaft 60, that is, the peripheral surface of the large-diameter through hole 621. The partition member 75 is arranged on the left side of the through hole 63A, and the annular space SP (oil passage PA2) is partitioned into two spaces (SP1, SP2) on the left and right by the partition member 75. That is, it is divided into a space SP1 facing the through holes 63A and 63B of the rotating shaft 60 and a space SP2 facing the through holes 152C and 152D of the shaft portion 15. That is, the first space SP1 constitutes the oil passage PA21, and the second space SP2 constitutes the oil passage PA22. The mounting position of the partition member 75 may be on the left side of the through hole 63A of the rotating shaft 60, and may be the left end portion of the rotating shaft 60.

図２は、区画部材７５の構成を示す図１の要部拡大図である。図２に示すように、区画部材７５は、軸線ＣＬ１を中心とした略円筒形状の円筒部（大径円筒部）７５１と、円筒部７５１よりも小径である、軸線ＣＬ１を中心とした略円筒形状の円筒部（小径円筒部）７５３と、大径円筒部７５１の右端部と小径円筒部７５３の右端部とを接続する接続部（テーパー部）７５２とを有する。大径円筒部７５１の外周面の径は、回転軸６０の大径貫通孔６２１の径とほぼ等しい。大径円筒部７５１は、回転軸６０の左端部から圧入され、大径貫通孔６２１の周面に固定される。 FIG. 2 is an enlarged view of a main part of FIG. 1 showing the configuration of the partition member 75. As shown in FIG. 2, the partition member 75 has a substantially cylindrical cylindrical portion (large-diameter cylindrical portion) 751 centered on the axis CL1 and a substantially cylindrical portion centered on the axis CL1 having a diameter smaller than that of the cylindrical portion 751. It has a cylindrical portion (small diameter cylindrical portion) 753 having a shape, and a connecting portion (tapered portion) 752 that connects the right end portion of the large diameter cylindrical portion 751 and the right end portion of the small diameter cylindrical portion 753. The diameter of the outer peripheral surface of the large-diameter cylindrical portion 751 is substantially equal to the diameter of the large-diameter through hole 621 of the rotating shaft 60. The large-diameter cylindrical portion 751 is press-fitted from the left end portion of the rotating shaft 60 and fixed to the peripheral surface of the large-diameter through hole 621.

小径円筒部７５３の内側には、パイプ７０が配置される。小径円筒部７５３の内径は、パイプ７０の外径よりもわずかに（例えば１〜２ｍｍ程度）大きく、小径円筒部７５３の内周面とパイプ７０の外周面との間には、全周にわたって隙間ＣＬが設けられる。小径円筒部７５３の軸方向の長さは、例えば小径円筒部７５３の外径よりも長く、小径円筒部７５３は軸方向に長尺に構成される。これにより、小径円筒部７５３の内周面とパイプ７０の外周面との間の隙間ＣＬを介して油路ＰＡ２１から油路ＰＡ２２へとオイルが漏れることを抑制することができる。 A pipe 70 is arranged inside the small-diameter cylindrical portion 753. The inner diameter of the small-diameter cylindrical portion 753 is slightly larger than the outer diameter of the pipe 70 (for example, about 1 to 2 mm), and there is a gap over the entire circumference between the inner peripheral surface of the small-diameter cylindrical portion 753 and the outer peripheral surface of the pipe 70. CL is provided. The axial length of the small-diameter cylindrical portion 753 is longer than, for example, the outer diameter of the small-diameter cylindrical portion 753, and the small-diameter cylindrical portion 753 is configured to be long in the axial direction. As a result, it is possible to prevent oil from leaking from the oil passage PA21 to the oil passage PA22 through the gap CL between the inner peripheral surface of the small-diameter cylindrical portion 753 and the outer peripheral surface of the pipe 70.

小径円筒部７５３の右端部は大径円筒部７５１の右端部よりも左方に位置し、テーパー部７５２は、軸線ＣＬ１を中心としたテーパー状に構成される。すなわち、テーパー部７５２は左方にかけて徐々に縮径されるように構成される。オイル供給ユニットの組立時に、パイプ７０は、テーパー部７５２により径方向中央に案内されて、区画部材７５の右方から小径円筒部７５３内に挿通する。テーパー部７５２の軸線ＣＬ１に対する傾斜角度θは、パイプ７０の左端部を小径円筒部７５３内に案内可能な角度であればよく、例えば４５°〜６０°の範囲内に設定される。 The right end of the small-diameter cylindrical portion 753 is located to the left of the right end of the large-diameter cylindrical portion 751, and the tapered portion 752 is formed in a tapered shape centered on the axis CL1. That is, the tapered portion 752 is configured to be gradually reduced in diameter toward the left. At the time of assembling the oil supply unit, the pipe 70 is guided in the radial center by the tapered portion 752 and is inserted into the small diameter cylindrical portion 753 from the right side of the partition member 75. The inclination angle θ of the tapered portion 752 with respect to the axis CL1 may be an angle that can guide the left end portion of the pipe 70 into the small-diameter cylindrical portion 753, and is set in the range of, for example, 45 ° to 60 °.

オイル供給ユニットは、区画部材７５内に右方からパイプ７０を挿入し、パイプ７０の左端部をケース５１の凹部５８に嵌合した後、ケースカバー５２をケース５１の右面に取り付けることにより組み立てられる。図３は、本実施形態に係るオイル供給ユニットの要部の寸法を説明する図である。図３に示すように、ケース５１の側壁５３の凹部５８の入口（右端面）から区画部材７５の小径円筒部７５３の右端までの軸方向の長さをＬ１、小径円筒部７５３の軸方向の長さをＬ２、小径円筒部７５３の内径をＤ１、パイプ７０の外径をＤ２、凹部５８のテーパー面５８１の入口（右端面）の径をＤ３と定義する。 The oil supply unit is assembled by inserting the pipe 70 into the partition member 75 from the right side, fitting the left end portion of the pipe 70 into the recess 58 of the case 51, and then attaching the case cover 52 to the right surface of the case 51. .. FIG. 3 is a diagram for explaining the dimensions of the main part of the oil supply unit according to the present embodiment. As shown in FIG. 3, the axial length from the entrance (right end surface) of the recess 58 of the side wall 53 of the case 51 to the right end of the small diameter cylindrical portion 753 of the partition member 75 is L1, and the axial length of the small diameter cylindrical portion 753. The length is defined as L2, the inner diameter of the small-diameter cylindrical portion 753 is defined as D1, the outer diameter of the pipe 70 is defined as D2, and the diameter of the inlet (right end surface) of the tapered surface 581 of the recess 58 is defined as D3.

ここで、パイプ７０をケース５１の凹部５８に嵌合するパイプ７０の取付時において、パイプ７０の左端が区画部材７５を通過してから凹部５８のテーパー面５８１の入口に到るまでのパイプ７０の軸線ＣＬ１に対する最大傾斜角をθ１と定義すると、次式(I)が成立する。
ｔａｎθ１＝（Ｄ３−Ｄ２）／（２・Ｌ１）・・・(I) Here, when the pipe 70 that fits the pipe 70 into the recess 58 of the case 51 is attached, the pipe 70 from the left end of the pipe 70 passing through the partition member 75 to the inlet of the tapered surface 581 of the recess 58. If the maximum inclination angle with respect to the axis CL1 is defined as θ1, the following equation (I) holds.
tan θ1 = (D3-D2) / (2 ・ L1) ・・・ (I)

パイプ７０の取付時にパイプ７０の先端部の径方向の位置（軸線ＣＬ１に対する傾斜角）、すなわち軸線ＣＬ１からの径方向の位置ずれは、区画部材７５の小径円筒部７５３により規制される。この場合、パイプ７０の左端が円筒部７５３の右端を通過してから円筒部７５３の左端に到るまでのパイプ７０の軸線ＣＬ１に対する最大傾斜角をθ２と定義すると、次式(II)が成立する。
ｔａｎθ２＝（Ｄ１−Ｄ２）／（２・Ｌ２）・・・(II) When the pipe 70 is attached, the radial position of the tip of the pipe 70 (inclination angle with respect to the axis CL1), that is, the radial position deviation from the axis CL1 is regulated by the small-diameter cylindrical portion 753 of the partition member 75. In this case, if the maximum inclination angle of the pipe 70 with respect to the axis CL1 from passing the right end of the cylindrical portion 753 to reaching the left end of the cylindrical portion 753 is defined as θ2, the following equation (II) is established. To do.
tan θ2 = (D1-D2) / (2 ・ L2) ・・・ (II)

θ２は、円筒部７５３により規制されたパイプ７０の最大傾斜角である。このため、θ２がθ１より小さい場合（θ１＞θ２）に、パイプ７０の先端（左端部）を凹部５８のテーパー面５８１に到達できる。したがって、上式(I),(II)より、次式(III)が成立すれば、区画部材７５を通過したパイプ７０の先端部を凹部５８に嵌合することができる。
（Ｄ３−Ｄ２）／Ｌ１＞（Ｄ１−Ｄ２）／Ｌ２・・・(III) θ2 is the maximum inclination angle of the pipe 70 regulated by the cylindrical portion 753. Therefore, when θ2 is smaller than θ1 (θ1> θ2), the tip (left end) of the pipe 70 can reach the tapered surface 581 of the recess 58. Therefore, from the above equations (I) and (II), if the following equation (III) is satisfied, the tip of the pipe 70 that has passed through the partition member 75 can be fitted into the recess 58.
(D3-D2) / L1> (D1-D2) / L2 ... (III)

以上が、回転軸６０の右端から貫通孔６２に挿入されたパイプ７０が、ケース５１の凹部５８に嵌合するための条件である。本実施形態では、この条件が成立するように各部の寸法が設定される。次に、パイプ７０の右端にケースカバー５２の凹部５９を嵌合するための条件について説明する。この場合、図３に示すように、ケースカバー５２の凹部５９の入口（左端面）から区画部材７５の小径円筒部７５３の右端までの軸方向の長さをＬ３、凹部５９のテーパー面５９１の入口（左端面）の径をＤ４と定義する。 The above are the conditions for the pipe 70 inserted into the through hole 62 from the right end of the rotating shaft 60 to fit into the recess 58 of the case 51. In the present embodiment, the dimensions of each part are set so that this condition is satisfied. Next, the conditions for fitting the recess 59 of the case cover 52 to the right end of the pipe 70 will be described. In this case, as shown in FIG. 3, the axial length from the inlet (left end surface) of the recess 59 of the case cover 52 to the right end of the small-diameter cylindrical portion 753 of the partition member 75 is L3, and the tapered surface 591 of the recess 59. The diameter of the entrance (left end face) is defined as D4.

このとき、小径円筒部７５３により規制されたパイプ７０の軸線ＣＬ１に対する最大傾斜角、すなわちパイプ７０の右端の傾斜角をθ３と定義すると、次式(IV)が成立する。
ｔａｎθ３＝（Ｄ１−Ｄ２）／（２・Ｌ１）・・・(IV) At this time, if the maximum inclination angle of the pipe 70 with respect to the axis CL1 regulated by the small-diameter cylindrical portion 753, that is, the inclination angle of the right end of the pipe 70 is defined as θ3, the following equation (IV) is established.
tan θ3 = (D1-D2) / (2 ・ L1) ・・・ (IV)

一方、パイプ７０の右端がケースカバー５２の凹部５９のテーパー面５９１の入口（左端面）に到るまでのパイプの軸線ＣＬ１に対する最大傾斜角をθ４と定義すると、次式(V)が成立する。
ｔａｎθ４＝（Ｄ４−Ｄ２）／[２・（Ｌ１＋Ｌ３）] ・・・(V) On the other hand, if the maximum inclination angle of the pipe 70 with respect to the axis CL1 until the right end of the pipe 70 reaches the inlet (left end surface) of the tapered surface 591 of the recess 59 of the case cover 52 is defined as θ4, the following equation (V) is established. ..
tan θ4 = (D4-D2) / [2 ・ (L1 + L3)] ・・・ (V)

これにより、θ３がθ４より小さい場合（θ４＞θ３）に、パイプ７０の先端（右端部）にケースカバー５２の凹部５９を嵌合可能となる。したがって、上式(IV),(V)より、次式(VI)が成立すれば、区画部材７５の先端部に凹部５９を嵌合することができる。本実施形態では、この条件が成立するように各部の寸法が設定される。
（Ｄ４−Ｄ２）／（Ｌ１＋Ｌ３）＞（Ｄ１−Ｄ２）／Ｌ１・・・(VI) As a result, when θ3 is smaller than θ4 (θ4> θ3), the recess 59 of the case cover 52 can be fitted to the tip (right end) of the pipe 70. Therefore, from the above equations (IV) and (V), if the following equation (VI) is satisfied, the recess 59 can be fitted to the tip end portion of the partition member 75. In the present embodiment, the dimensions of each part are set so that this condition is satisfied.
(D4-D2) / (L1 + L3)> (D1-D2) / L1 ... (VI)

図１を参照して本実施形態に係るオイル供給ユニットの主要な動作を説明する。オイル供給ユニットの組立時には、まず、貫通孔６２の周面に区画部材７５が取り付けられた状態の回転軸６０を、軸部１５に結合し、軸部１５と回転軸６０とを一体にしてケース５１から支持する。次に、回転軸６０の右端から回転軸６０内にパイプ７０を挿入する。このとき、パイプ７０の先端部（左端部）は、区画部材７５のテーパー部７５２に案内されるため、小径円筒部７５３にパイプ７０を容易に挿通することができる。小径円筒部７５３に挿通されたパイプ７０は、小径円筒部７５３により径方向の位置が規制される。これにより、パイプ７０の先端部を、テーパー面５８１を介してケース５の凹部５８に容易に嵌合することができる。 The main operation of the oil supply unit according to the present embodiment will be described with reference to FIG. When assembling the oil supply unit, first, the rotating shaft 60 in which the partition member 75 is attached to the peripheral surface of the through hole 62 is connected to the shaft portion 15, and the shaft portion 15 and the rotating shaft 60 are integrated into a case. Support from 51. Next, the pipe 70 is inserted into the rotating shaft 60 from the right end of the rotating shaft 60. At this time, since the tip end portion (left end portion) of the pipe 70 is guided by the tapered portion 752 of the partition member 75, the pipe 70 can be easily inserted into the small-diameter cylindrical portion 753. The position of the pipe 70 inserted through the small-diameter cylindrical portion 753 is regulated by the small-diameter cylindrical portion 753 in the radial direction. As a result, the tip end portion of the pipe 70 can be easily fitted into the recess 58 of the case 5 via the tapered surface 581.

パイプ７０の左端部が凹部５８に嵌合された後、ケース５１の右端面に、例えばボルトによりケースカバー５２が取り付けられる。この場合、パイプ７０の径方向の位置は、区画部材７５の円筒部７５３によって規制されるため、パイプ７０の右端部に、テーパー面５９１を介してケースカバー５２の凹部５９を容易に嵌合することができる。これにより、パイプ７０の両端がケース５１およびケースカバー５２によって位置決めされた状態で、パイプ７０をケース５１およびケースカバー５２から安定して支持することができる。 After the left end of the pipe 70 is fitted into the recess 58, the case cover 52 is attached to the right end surface of the case 51, for example, with a bolt. In this case, since the radial position of the pipe 70 is regulated by the cylindrical portion 753 of the partition member 75, the recess 59 of the case cover 52 is easily fitted to the right end portion of the pipe 70 via the tapered surface 591. be able to. As a result, the pipe 70 can be stably supported from the case 51 and the case cover 52 in a state where both ends of the pipe 70 are positioned by the case 51 and the case cover 52.

このようにして組み立てられたオイル供給ユニットにおいて、オイルポンプ２０の駆動により吐出されたオイルは、油路ＰＡ１および貫通孔５３ａを介してパイプ７０内の油路ＰＡ３に導かれる。油路ＰＡ３に導かれたオイルの一部は、パイプ７０の左側の貫通孔７４Ｃ，７４Ｄ，７４Ｆを介して区画部材７５の左側の環状の油路ＰＡ２２に流入する。油路ＰＡ２２に流入したオイルは、遠心力で軸部１５の内周面側に移動する。そして、貫通孔１５２Ｃ，１５２Ｄを介して軸部１５の外側に流出し、ロータコア１６を冷却するとともに、連通路５７を介してベアリング３３を潤滑する。 In the oil supply unit assembled in this way, the oil discharged by the drive of the oil pump 20 is guided to the oil passage PA3 in the pipe 70 through the oil passage PA1 and the through hole 53a. A part of the oil guided to the oil passage PA3 flows into the annular oil passage PA22 on the left side of the partition member 75 through the through holes 74C, 74D, 74F on the left side of the pipe 70. The oil flowing into the oil passage PA22 moves to the inner peripheral surface side of the shaft portion 15 by centrifugal force. Then, it flows out to the outside of the shaft portion 15 through the through holes 152C and 152D, cools the rotor core 16, and lubricates the bearing 33 through the communication passage 57.

油路ＰＡ３に導かれたオイルの残りは、パイプ７０の右側の貫通孔７４Ａ，７４Ｂ，７４Ｅを介して区画部材７５の右側の環状の油路ＰＡ２１に流入する。油路ＰＡ２１に流入したオイルは、遠心力で回転軸６０の内周面側に移動する。そして、貫通孔６３Ａ，６３Ｂを介して回転軸６０の外側に流出し、スプラインＳＬ１およびベアリング３１を潤滑するとともに、スプラインＳＬ２を潤滑し、さらに連通路５６を介してベアリング３２を潤滑する。 The rest of the oil guided to the oil passage PA3 flows into the annular oil passage PA21 on the right side of the partition member 75 through the through holes 74A, 74B, 74E on the right side of the pipe 70. The oil that has flowed into the oil passage PA21 moves to the inner peripheral surface side of the rotating shaft 60 by centrifugal force. Then, it flows out to the outside of the rotating shaft 60 through the through holes 63A and 63B, lubricates the spline SL1 and the bearing 31, lubricates the spline SL2, and further lubricates the bearing 32 through the communication passage 56.

パイプ７０の右側の貫通孔７４Ａ，７４Ｂ，７４Ｅは、左側の貫通孔７４Ｃ，７４Ｄ，７４Ｆよりも大径である。このため、油路ＰＡ２１には油路ＰＡ２２よりも多くのオイルがパイプ７０内から流出する。これにより、区画部材７５で区画された油路ＰＡ２１にオイルが充填されるので、車両が傾斜したときや、車両に前後方向や左右方向の加速度または減速度が作用したときに、回転軸６０内のオイルが偏ることを防止できる。その結果、回転軸６０の周囲の各部（例えばベアリング３１やスプラインＳＬ１，ＳＬ２等）に十分な量のオイルを供給することができる。また、ポンプ容量を増大する必要がなく、小型のオイルポンプを使用できるため、コストの上昇を抑えることができる。 The through holes 74A, 74B, 74E on the right side of the pipe 70 have a larger diameter than the through holes 74C, 74D, 74F on the left side. Therefore, more oil flows into the oil passage PA21 than in the oil passage PA22 from the inside of the pipe 70. As a result, the oil passage PA21 partitioned by the partition member 75 is filled with oil, so that when the vehicle is tilted or when acceleration or deceleration in the front-rear direction or left-right direction acts on the vehicle, the inside of the rotating shaft 60 It is possible to prevent the oil from being biased. As a result, a sufficient amount of oil can be supplied to each part (for example, the bearing 31, splines SL1, SL2, etc.) around the rotating shaft 60. Moreover, since it is not necessary to increase the pump capacity and a small oil pump can be used, it is possible to suppress an increase in cost.

区画部材７５は回転軸６０の内周面に設けられ、区画部材７５の円筒部７５３の内周面とパイプ７０の外周面との間にわずかな隙間ＣＬ（図２）があるが、円筒部７５１の外周面と回転軸６０の内周面との間に隙間はない。したがって、油路ＰＡ２１に流入した後に、遠心力により回転軸６０の内周面側に移動したオイルが、円筒部７５３とパイプ７０との隙間を介して油路ＰＡ２１から油路ＰＡ２２へ漏れることを抑制することができる。これに加え、円筒部７５３が軸方向に長尺に構成されるので、円筒部７５３がシール機能を発揮し、円筒部７５３の径方向内側を介したオイルの漏れを一層抑制することができる。 The partition member 75 is provided on the inner peripheral surface of the rotating shaft 60, and there is a slight gap CL (FIG. 2) between the inner peripheral surface of the cylindrical portion 753 of the partition member 75 and the outer peripheral surface of the pipe 70, but the cylindrical portion. There is no gap between the outer peripheral surface of the 751 and the inner peripheral surface of the rotating shaft 60. Therefore, after flowing into the oil passage PA21, the oil that has moved to the inner peripheral surface side of the rotating shaft 60 due to centrifugal force leaks from the oil passage PA21 to the oil passage PA22 through the gap between the cylindrical portion 753 and the pipe 70. It can be suppressed. In addition to this, since the cylindrical portion 753 is configured to be long in the axial direction, the cylindrical portion 753 exerts a sealing function, and oil leakage through the radial inside of the cylindrical portion 753 can be further suppressed.

図４Ａは、回転軸６０が回転中に油路ＰＡ２１内のオイルＯＬが区画部材７５に及ぼす力を模式的に示す図である。本実施形態では、区画部材７５がテーパー部７５２を有する。こたのめ、図４Ａに示すように、遠心力により径方向外側に移動した油路ＰＡ２１内のオイルＯＬが区画部材７５を押圧する力Ｆ１は、左方に向かう力Ｆ２と径方向外側に向かう力Ｆ３とに分散される。これにより、左方に向かう力Ｆ２、すなわち区画部材７５が外れる方向に作用する押圧力Ｆ２は減少する。また、径方向外側へ向かう押圧力Ｆ３は、区画部材７５を回転軸６０の内周面に押し付けるように作用する。これにより、回転軸６０の内周面に、区画部材７５を安定して保持することができる。 FIG. 4A is a diagram schematically showing the force exerted on the partition member 75 by the oil OL in the oil passage PA21 while the rotating shaft 60 is rotating. In this embodiment, the partition member 75 has a tapered portion 752. As shown in FIG. 4A, the force F1 in which the oil OL in the oil passage PA21 that has moved radially outward due to the centrifugal force presses the partition member 75 is a force F2 toward the left and a force F2 toward the outside in the radial direction. It is distributed to F3. As a result, the force F2 toward the left, that is, the pressing force F2 acting in the direction in which the partition member 75 comes off is reduced. Further, the pressing force F3 toward the outer side in the radial direction acts to press the partition member 75 against the inner peripheral surface of the rotating shaft 60. As a result, the partition member 75 can be stably held on the inner peripheral surface of the rotating shaft 60.

図４Ｂは、図４Ａの比較例を示す図である。図４Ｂでは、区画部材７５Ａが断面略Ｌ字状に構成され、区画部材７５Ａは、回転軸６０の内周面に嵌合する円筒部７５１Ａと、円筒部７５１Ａの端部から径方向内側に延在するプレート部７５２Ａとを有する。この例では、図４Ｂに示すように、油路ＰＡ２１内のオイルＯＬが区画部材７５を押圧する力Ｆ１０は、プレート部７５２Ａを左方に押圧する力だけであり、テーパー部７５２を左方へ押圧する力Ｆ２（図４Ａ）よりも大きい。このため、図４Ｂの構成では、区画部材７５Ａが左方に移動し、回転軸６０から脱落するおそれがある。 FIG. 4B is a diagram showing a comparative example of FIG. 4A. In FIG. 4B, the partition member 75A is configured to have a substantially L-shaped cross section, and the partition member 75A extends inward in the radial direction from the cylindrical portion 751A that fits the inner peripheral surface of the rotating shaft 60 and the end portion of the cylindrical portion 751A. It has an existing plate portion 752A. In this example, as shown in FIG. 4B, the force F10 that the oil OL in the oil passage PA21 presses the partition member 75 is only the force that presses the plate portion 752A to the left, and the tapered portion 752 to the left. It is larger than the pressing force F2 (FIG. 4A). Therefore, in the configuration of FIG. 4B, the partition member 75A may move to the left and fall off from the rotating shaft 60.

本実施形態によれば以下のような作用効果を奏することができる。
（１）オイル供給ユニットは、左右方向の軸線ＣＬ１に沿って延在する貫通孔６２，１５１を有するとともに、軸線ＣＬ１を中心に回転可能に設けられた軸体（回転軸６０，軸部１５）と、貫通孔６２，１５１の内部に軸線ＣＬ１に沿って配置されたパイプ７０と、パイプ７０の左右両端部を支持するケース５１およびケースカバー５２と、回転軸６０の内周面に設けられ、回転軸６０および軸部１５の内周面とパイプ７０の外周面との間の環状空間ＳＰを軸方向に区画する区画部材７５と、を備える（図１）。パイプ７０と、回転軸６０および軸部１５とには、パイプ７０の内側に供給されたオイルが環状空間ＳＰを経由して回転軸６０および軸部１５の径方向外側に流れるように、パイプ７０を貫通する貫通孔７４と回転軸６０および軸部１５を貫通する貫通孔６３，１５２とがそれぞれ穿設される（図１）。区画部材７５は、回転軸６０の内周面から径方向内側かつ左方（パイプ７０の挿入方向）に向けて延在するテーパー部７５２を有する（図２）。 According to this embodiment, the following actions and effects can be obtained.
(1) The oil supply unit has through holes 62 and 151 extending along the axis CL1 in the left-right direction, and is a shaft body (rotating shaft 60, shaft portion 15) rotatably provided around the axis CL1. A pipe 70 arranged inside the through holes 62 and 151 along the axis CL1, a case 51 and a case cover 52 supporting both left and right ends of the pipe 70, and an inner peripheral surface of the rotating shaft 60 are provided. A partition member 75 for axially partitioning the annular space SP between the inner peripheral surface of the rotating shaft 60 and the shaft portion 15 and the outer peripheral surface of the pipe 70 is provided (FIG. 1). The pipe 70 is provided with the rotating shaft 60 and the shaft portion 15 so that the oil supplied to the inside of the pipe 70 flows outward in the radial direction of the rotating shaft 60 and the shaft portion 15 via the annular space SP. A through hole 74 penetrating the shaft 60 and through holes 63 and 152 penetrating the rotating shaft 60 and the shaft portion 15 are bored (FIG. 1). The partition member 75 has a tapered portion 752 extending radially inward and to the left (in the insertion direction of the pipe 70) from the inner peripheral surface of the rotating shaft 60 (FIG. 2).

この構成により、回転軸６０および軸部１５の内部に挿入されたパイプ７０が区画部材７５により規制されるので、軸線ＣＬ１に沿った凹部５８，５９にパイプ７０の端部を容易に嵌合することができる。また、回転軸６０および軸部１５の内部の環状空間ＳＰが区画部材７５により区画されるので、大容量のオイルポンプを用いることなく、区画部材７５により区画された空間ＳＰ２の油路ＰＡ２１をオイルで満たすことができる。したがって、組立性が容易で、かつ、安価に構成されたオイル供給ユニットを提供することができる。 With this configuration, the pipe 70 inserted inside the rotating shaft 60 and the shaft portion 15 is regulated by the partition member 75, so that the end portion of the pipe 70 is easily fitted into the recesses 58 and 59 along the axis CL1. be able to. Further, since the annular space SP inside the rotating shaft 60 and the shaft portion 15 is partitioned by the partition member 75, the oil passage PA21 of the space SP2 partitioned by the partition member 75 is oiled without using a large-capacity oil pump. Can be filled with. Therefore, it is possible to provide an oil supply unit that is easy to assemble and is inexpensively configured.

（２）区画部材７５は、テーパー部７５２の内径側端部に連設され、軸線ＣＬ１に沿ってパイプ７０の周囲に延在する小径円筒部７５３を有する（図２）。これにより、小径円筒部７５３がシール機能を発揮し、区画部材７５により区画された油路ＰＡ２１から油路ＰＡ２２へのオイルの漏れを抑制することができる。また、小径円筒部７５３がパイプ７０の位置を抑制するので、パイプ７０の端部を凹部５８，５９に嵌合する際の組み立てが容易である。 (2) The partition member 75 has a small-diameter cylindrical portion 753 that is connected to the inner diameter side end of the tapered portion 752 and extends around the pipe 70 along the axis CL1 (FIG. 2). As a result, the small-diameter cylindrical portion 753 exerts a sealing function, and oil leakage from the oil passage PA21 partitioned by the partition member 75 to the oil passage PA22 can be suppressed. Further, since the small-diameter cylindrical portion 753 suppresses the position of the pipe 70, it is easy to assemble when the end portion of the pipe 70 is fitted into the recesses 58 and 59.

（３）回転軸６０および軸部１５を径方向に貫通する貫通孔６３，１５２は、それぞれ回転軸６０および軸部１５の周囲の所定部位（スプラインＳＬ１，ＳＬ２やロータコア１６等）にオイルが供給されるように所定部位の位置に対応して設けられる（図１）。また、パイプ７０を径方向に貫通する貫通孔７４は、貫通孔６３，１５２と軸方向略同一位置に設けられる。これによりパイプ内の油路ＰＡ３から流出したオイルを回転軸６０および軸部１５の周囲の部品等に効率よく導くことができる。 (3) Through holes 63 and 152 penetrating the rotating shaft 60 and the shaft portion 15 in the radial direction, oil is supplied to predetermined parts (splines SL1, SL2, rotor core 16, etc.) around the rotating shaft 60 and the shaft portion 15, respectively. It is provided corresponding to the position of a predetermined portion so as to be (Fig. 1). Further, the through hole 74 that penetrates the pipe 70 in the radial direction is provided at substantially the same position in the axial direction as the through holes 63 and 152. As a result, the oil flowing out from the oil passage PA3 in the pipe can be efficiently guided to the parts around the rotating shaft 60 and the shaft portion 15.

（４）回転軸６０の貫通孔６２は、左側の大径貫通孔６２１と右側の小径貫通孔６２２とを有する（図１）。区画部材７５は、テーパー部７５２が大径貫通孔６２１の内周面から径方向内側かつ左側に向けて延在するように大径貫通孔６２１の内周面に設けられる（図２）。これにより、回転軸６０が段付き状に構成される場合であっても、回転軸６０の内周面に単一の区画部材７５を装着することにより、パイプ７０の両端をケース５１およびケースカバー５２の凹部５８，５９に容易に嵌合することができる。この点を、図１の比較例である図５を参照して説明する。 (4) The through hole 62 of the rotating shaft 60 has a large diameter through hole 621 on the left side and a small diameter through hole 622 on the right side (FIG. 1). The partition member 75 is provided on the inner peripheral surface of the large-diameter through hole 621 so that the tapered portion 752 extends radially inward from the inner peripheral surface of the large-diameter through hole 621 and toward the left side (FIG. 2). As a result, even when the rotating shaft 60 is configured in a stepped shape, by mounting a single partition member 75 on the inner peripheral surface of the rotating shaft 60, both ends of the pipe 70 are covered with the case 51 and the case cover. It can be easily fitted into the recesses 58 and 59 of 52. This point will be described with reference to FIG. 5, which is a comparative example of FIG.

図５では、回転軸６０の内周面に図４Ｂの区画部材７５Ａが取り付けられる。パイプ７０Ａの外周面には、左右一対の略円形のガイド部７０１，７０２が径方向外側に向けて突設される。ガイド部７０１，７０２の外径は、回転軸６０の小径貫通孔６２２の径よりやや小さく形成される。左側のガイド部７０１は、回転軸６０内に挿入されたパイプ７０Ａの先端部（左端部）が区画部材７５Ａの中央の貫通孔を通過するとき、小径貫通孔６２２の内部に位置する。これにより、ガイド部７０１は、区画部材７５Ａの貫通孔へパイプ７０Ａが挿入される際にパイプ７０Ａの位置を規制する。右側のガイド部７０２は、パイプ７０Ａの先端部がケース５１の凹部５８に嵌合するとき、小径貫通孔６２２の内部に位置する。これにより、ガイド部７０２は、凹部５８へパイプ７０Ａが嵌合される際にパイプ７０Ａの位置を規制する。 In FIG. 5, the partition member 75A of FIG. 4B is attached to the inner peripheral surface of the rotating shaft 60. A pair of left and right substantially circular guide portions 701 and 702 are provided on the outer peripheral surface of the pipe 70A so as to project outward in the radial direction. The outer diameters of the guide portions 701 and 702 are formed to be slightly smaller than the diameter of the small diameter through hole 622 of the rotating shaft 60. The left guide portion 701 is located inside the small diameter through hole 622 when the tip end portion (left end portion) of the pipe 70A inserted into the rotating shaft 60 passes through the central through hole of the partition member 75A. As a result, the guide portion 701 regulates the position of the pipe 70A when the pipe 70A is inserted into the through hole of the partition member 75A. The guide portion 702 on the right side is located inside the small diameter through hole 622 when the tip end portion of the pipe 70A fits into the recess 58 of the case 51. As a result, the guide portion 702 regulates the position of the pipe 70A when the pipe 70A is fitted into the recess 58.

このように図５の例では、段付き状の貫通孔６２にパイプ７０Ａが挿入される場合、パイプ７０Ａの外周面にガイド部７０１，７０２を設ける必要があり、パイプ７０Ａの構成が複雑となってコストが上昇する。これに対し、本実施形態では、パイプ７０の外周面にガイド部等を設ける必要がないため、パイプ７０の構成を簡素化でき、コストの上昇を抑えることができる。 As described above, in the example of FIG. 5, when the pipe 70A is inserted into the stepped through hole 62, it is necessary to provide the guide portions 701 and 702 on the outer peripheral surface of the pipe 70A, which complicates the configuration of the pipe 70A. And the cost goes up. On the other hand, in the present embodiment, since it is not necessary to provide a guide portion or the like on the outer peripheral surface of the pipe 70, the configuration of the pipe 70 can be simplified and the cost increase can be suppressed.

（５）ケース５１およびケースカバー５２は、パイプ７０の左右両端部が嵌合する凹部５８，５９を有する（図１）。これによりパイプ７０を回転軸６０の内部に安定的に支持することができる。 (5) The case 51 and the case cover 52 have recesses 58 and 59 into which the left and right ends of the pipe 70 are fitted (FIG. 1). As a result, the pipe 70 can be stably supported inside the rotating shaft 60.

上記実施形態は種々の形態に変形することができる。以下、いくつかの変形例について説明する。上記実施形態では、区画部材７５の小径円筒部７５３の軸方向長さを小径円筒部７５３の外径よりも長くしたが、オイルの十分なシール機能を発揮できるのであれば、小径円筒部の軸方向長さを外径と等しくしてもよい。また、図２の変形例である図６に示すように、小径円筒部７５３の軸方向長さを小径円筒部７５３の外径より短くしてもよい。すなわち、テーパー部の内径側端部に連設された筒部の構成は上述したものに限らない。上記実施形態では、回転軸６０と軸部１５とにより軸体を構成したが、単一の回転部材により軸体を構成してもよい。したがって、軸線ＣＬ１に沿って軸体に設けられた貫通孔、すなわち貫通軸孔の構成は上述したものに限らない。 The above embodiment can be transformed into various forms. Hereinafter, some modifications will be described. In the above embodiment, the axial length of the small-diameter cylindrical portion 753 of the partition member 75 is made longer than the outer diameter of the small-diameter cylindrical portion 753, but the shaft of the small-diameter cylindrical portion can exhibit a sufficient oil sealing function. The directional length may be equal to the outer diameter. Further, as shown in FIG. 6, which is a modification of FIG. 2, the axial length of the small-diameter cylindrical portion 753 may be shorter than the outer diameter of the small-diameter cylindrical portion 753. That is, the configuration of the tubular portion continuously provided at the inner diameter side end of the tapered portion is not limited to that described above. In the above embodiment, the shaft body is formed by the rotating shaft 60 and the shaft portion 15, but the shaft body may be formed by a single rotating member. Therefore, the structure of the through hole provided in the shaft body along the axis CL1, that is, the through shaft hole is not limited to that described above.

上記実施形態では、回転軸６０および軸部１５の貫通孔６２，１５１の内部に軸線ＣＬ１に沿ってパイプ７０を配置したが、管部材の構成は上述したものに限らない。例えば、軸方向の一端部が開口され、他端部が閉塞された管部材としてもよい。上記実施形態では、ケース５１（第１支持部材）およびケースカバー５２（第２支持部材）の凹部５８，５９によりパイプ７０の両端部を支持するようにしたが、支持部材の構成は上述したものに限らない。上記実施形態では、一対の円筒部７５１，７５３と円筒部７５１，７５３同士を接続するテーパー部７５２とを有するように区画部材７５を構成した。すなわち、それぞれテーパー部７５２から同一方向（左方）に延在する、第１筒部としての小径円筒部７５３と、第２筒部としての大径円筒部７５１とを、区画部材７５が有するようにしたが、軸体の内周面と管部材の外周面との間の環状空間を軸方向に区画するとともに、軸体の内周面から径方向内側かつ軸方向に向けて延在するテーパー部を有するのであれば、区画部材の構成はいかなるものでもよい。区画部材を軸方向に複数配置し、環状空間を軸方向に３つ以上の空間に区画するようにしてもよい。 In the above embodiment, the pipe 70 is arranged along the axis CL1 inside the through holes 62 and 151 of the rotating shaft 60 and the shaft portion 15, but the configuration of the pipe member is not limited to that described above. For example, it may be a pipe member in which one end in the axial direction is opened and the other end is closed. In the above embodiment, both ends of the pipe 70 are supported by the recesses 58 and 59 of the case 51 (first support member) and the case cover 52 (second support member), but the structure of the support member is as described above. Not limited to. In the above embodiment, the partition member 75 is configured to have a pair of cylindrical portions 751, 753 and a tapered portion 752 connecting the cylindrical portions 751, 753 to each other. That is, the partition member 75 has a small-diameter cylindrical portion 753 as the first tubular portion and a large-diameter cylindrical portion 751 as the second tubular portion, which extend from the tapered portion 752 in the same direction (leftward). However, the annular space between the inner peripheral surface of the shaft body and the outer peripheral surface of the pipe member is partitioned in the axial direction, and the taper extends radially inward and axially from the inner peripheral surface of the shaft body. Any configuration of the partition member may be used as long as it has a portion. A plurality of partition members may be arranged in the axial direction, and the annular space may be partitioned into three or more spaces in the axial direction.

上記実施形態では、回転軸６０および軸部１５の周囲に配置された部品等にオイルが供給されるように回転軸６０および軸部１５にそれぞれ貫通孔６３，１５２（第２貫通孔）を設けるとともに、パイプ７０に、貫通孔６３，１５２と軸方向略同一位置に貫通孔７４（第１貫通孔）を設けるようにしたが、第１貫通孔および第２貫通孔の位置や個数は上述したものに限らない。上記実施形態では、回転軸６０に大径貫通孔６２１（大径部）と小径貫通孔６２２（小径部）とを設けたが、貫通軸孔を段付き状ではなく平坦に構成してもよい。上記実施形態では、パイプ７０の右端をケースカバー５２により閉塞するようにしたが、管部材の両端を開口し、管部材を軸方向に貫通してオイルが流れるようにしてもよい。 In the above embodiment, through holes 63 and 152 (second through holes) are provided in the rotating shaft 60 and the shaft portion 15, respectively, so that oil is supplied to the parts and the like arranged around the rotating shaft 60 and the shaft portion 15. At the same time, the pipe 70 is provided with the through holes 74 (first through holes) at substantially the same positions as the through holes 63 and 152 in the axial direction, but the positions and numbers of the first through holes and the second through holes are described above. Not limited to things. In the above embodiment, the rotary shaft 60 is provided with a large diameter through hole 621 (large diameter portion) and a small diameter through hole 622 (small diameter portion), but the through shaft hole may be formed flat instead of stepped. .. In the above embodiment, the right end of the pipe 70 is closed by the case cover 52, but both ends of the pipe member may be opened so that the oil flows through the pipe member in the axial direction.

以上では、オイル供給ユニットを車両駆動装置に適用する例を説明したが、本発明のオイル供給ユニットは、車両駆動装置以外の種々の装置に対しても同様に適用することができる。 Although the example of applying the oil supply unit to the vehicle drive device has been described above, the oil supply unit of the present invention can be similarly applied to various devices other than the vehicle drive device.

以上の説明はあくまで一例であり、本発明の特徴を損なわない限り、上述した実施形態により本発明が限定されるものではない。上記実施形態と変形例の１つまたは複数を任意に組み合わせることも可能であり、変形例同士を組み合わせることも可能である。 The above description is merely an example, and the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired. It is also possible to arbitrarily combine one or a plurality of the above-described embodiments and the modified examples, and it is also possible to combine the modified examples.

１５軸部、５１ケース、５２ケースカバー、５８，５９凹部、６０回転軸、６２，６３貫通孔、７０パイプ、７５区画部材、１５１，１５２貫通孔、６２１大径貫通孔、６２２小径貫通孔、７５２テーパー部、７５３円筒部、ＳＰ環状空間 15 shafts, 51 cases, 52 case covers, 58,59 recesses, 60 rotating shafts, 62,63 through holes, 70 pipes, 75 compartment members, 151,152 through holes, 621 large diameter through holes, 622 small diameter through holes, 752 Tapered part, 753 Cylindrical part, SP annular space

Claims

A shaft body having a through shaft hole extending along the axis and rotatably provided around the axis,
A pipe member arranged along the axis inside the through shaft hole,
A support member that supports the axial end of the pipe member and
A partition member provided on the inner peripheral surface of the shaft body and axially partitioning an annular space between the inner peripheral surface of the shaft body and the outer peripheral surface of the pipe member is provided.
A first through hole penetrating the pipe member and the shaft body so that oil supplied to the inside of the pipe member flows outward in the radial direction of the shaft body via the annular space. And a second through hole penetrating the shaft body are bored, respectively.
The partition member is an oil supply unit having a tapered portion extending radially inward from the inner peripheral surface of the shaft body and extending in the axial direction.

In the oil supply unit according to claim 1,
An oil supply unit characterized in that the partition member is continuously provided at an inner diameter side end portion of the tapered portion and has a tubular portion extending around the pipe member along the axis.

In the oil supply unit according to claim 1 or 2.
The second through hole is provided corresponding to the position of the component so that oil is supplied to the component arranged around the shaft body.
The oil supply unit is characterized in that the first through hole is provided at substantially the same position in the axial direction as the second through hole.

In the oil supply unit according to any one of claims 1 to 3,
The through shaft hole has a large diameter portion on one side in the axial direction and a small diameter portion on the other side in the axial direction.
The partition member is characterized in that the tapered portion is provided on the inner peripheral surface of the large diameter portion so as to extend radially inward from the inner peripheral surface of the large diameter portion and toward one side in the axial direction. Oil supply unit.

In the oil supply unit according to any one of claims 1 to 4.
The support member is an oil supply unit having a recess in which an axial end portion of the pipe member is fitted.