JP2009044834A - Oil-spillage suppressing structure of main motor for vehicle - Google Patents
Oil-spillage suppressing structure of main motor for vehicle Download PDFInfo
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- JP2009044834A JP2009044834A JP2007206288A JP2007206288A JP2009044834A JP 2009044834 A JP2009044834 A JP 2009044834A JP 2007206288 A JP2007206288 A JP 2007206288A JP 2007206288 A JP2007206288 A JP 2007206288A JP 2009044834 A JP2009044834 A JP 2009044834A
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Abstract
Description
本発明は、車両用主電動機の軸受装置の構造に関し、特に潤滑油の機外への漏出を抑制した車両用主電動機に関するものである。 The present invention relates to a structure of a bearing device for a vehicular main motor, and more particularly to a vehicular main motor in which leakage of lubricating oil to the outside is suppressed.
車両用主電動機の軸受の潤滑は従来よりグリースが用いられているが、分解保守期間の延長による保守作業の省力化を図る目的から、分解保守期間の延長が図れる油潤滑の軸受構造の開発研究が進められている。 Conventionally, grease has been used for the lubrication of bearings for traction motors in vehicles. However, in order to save labor in maintenance work by extending the disassembly maintenance period, research and development of a bearing structure for oil lubrication that can extend the disassembly maintenance period. Is underway.
図７は、従来の車両の駆動部の構成の一例を示す図である。
図７には、車両側から見た車両の駆動部が示される。図７中、１は車両用主電動機、２は継手、３は駆動装置、４は車輪、５は車軸である。
車両用主電動機１は、全閉型の電動機であり、駆動力を出力する。該車両用主電動機１は、図８を参照して後述する軸受装置を備える。継手２は、車両用主電動機１が出力した駆動力を駆動装置３に伝達する。
継手２は、例えば、下記の特許文献１に記載されているような可撓継手である。駆動装置３は、継手２から伝達された駆動力によって駆動され、この駆動力は車軸５に伝達され、車輪４が車軸５を軸として回転する。
FIG. 7 is a diagram illustrating an example of a configuration of a driving unit of a conventional vehicle.
FIG. 7 shows a vehicle drive unit viewed from the vehicle side. In FIG. 7, 1 is a vehicle main motor, 2 is a joint, 3 is a drive unit, 4 is a wheel, and 5 is an axle.
The vehicular main motor 1 is a fully-closed motor and outputs a driving force. The vehicular main motor 1 includes a bearing device which will be described later with reference to FIG. The joint 2 transmits the driving force output from the vehicular main motor 1 to the driving device 3.
The joint 2 is a flexible joint as described in Patent Document 1 below, for example. The driving device 3 is driven by the driving force transmitted from the joint 2, this driving force is transmitted to the axle 5, and the wheel 4 rotates around the axle 5.
図８は、図７に示す従来の車両の駆動部の部分断面図である。
図８には、継手２と、車両用主電動機１が備える軸受装置の断面が示される。該軸受装置は、軸受カバー１０、油掻揚げ円板１２、軸受１３、軸受押え１４、軸受箱１５、油溜め室１０ｃ、１５ａ、ラビリンス１０ｄ、１５ｃ、給油室１８、貯油室１８ａを備える。１１は車両用主電動機１の回転子軸、１７は車両用主電動機１の外カバーである。図８に示す軸受装置は、回転子軸１１の軸受１３に潤滑油を供給して潤滑する。継手２は、上記回転子軸１１に取り付けられている回転体である。継手２は、軸受装置に対向する位置に設けられ、回転子軸１１を中心に回転する。なお、可撓継手２以外の回転体を回転子軸１１に取り付け、該回転体を該軸受装置に対向する位置に設けるようにしてもよい。
FIG. 8 is a partial cross-sectional view of the drive unit of the conventional vehicle shown in FIG.
FIG. 8 shows a cross section of the bearing device included in the joint 2 and the vehicular main motor 1. The bearing device includes a bearing cover 10, an oil lifting disk 12, a bearing 13, a bearing retainer 14, a bearing box 15, oil sump chambers 10c and 15a, labyrinths 10d and 15c, an oil supply chamber 18, and an oil storage chamber 18a. Reference numeral 11 denotes a rotor shaft of the vehicular main motor 1, and reference numeral 17 denotes an outer cover of the vehicular main motor 1. The bearing device shown in FIG. 8 lubricates the bearing 13 of the rotor shaft 11 by supplying lubricating oil. The joint 2 is a rotating body attached to the rotor shaft 11. The joint 2 is provided at a position facing the bearing device and rotates around the rotor shaft 11. A rotating body other than the flexible joint 2 may be attached to the rotor shaft 11, and the rotating body may be provided at a position facing the bearing device.
貯油室１８ａは、給油室１８の下部の、潤滑油が貯蔵される部分である。油掻揚げ円板１２は回転子軸１１に取り付けられ、その下側の一部が貯油室１８ａの油中に浸されている。油掻揚げ円板１２が回転子軸１１とともに回転すると、貯油室１８ａの油が掻き揚げられ、給油室１８内に広がる。軸受箱１５には軸受１３が設けられ、回転子軸１１は軸受１３により回転可能に支持されている。油溜め室１５ａは軸受箱１５に設けられ、上記軸受１３を潤滑した油が溜められる。ラビリンス１５ｃは、回転子軸１１と軸受箱１５の隙間を通って油が機内に漏れるのを抑制している。 The oil storage chamber 18a is a portion of the lower portion of the oil supply chamber 18 where lubricating oil is stored. The oil-raised disk 12 is attached to the rotor shaft 11, and a part of the lower side thereof is immersed in the oil in the oil storage chamber 18a. When the oil scooping disc 12 rotates with the rotor shaft 11, the oil in the oil storage chamber 18 a is swept up and spreads in the oil supply chamber 18. A bearing 13 is provided in the bearing box 15, and the rotor shaft 11 is rotatably supported by the bearing 13. The oil sump chamber 15a is provided in the bearing box 15, and the oil which lubricated the bearing 13 is stored. The labyrinth 15c prevents oil from leaking through the gap between the rotor shaft 11 and the bearing housing 15 into the machine.
軸受押え１４は、軸受箱１５に取り付けられ、円環形状を有する。軸受押え１４は、軸受１３が軸受箱１５から離脱しないように軸受箱１５の外側から押えている。軸受カバー１０は、機外側側面に取り付けられ、中心部に上記回転子軸１１が貫通する穴を有する。軸受カバー１０は上記給油室１８の側面を覆うように配置され、該軸受カバー１０と軸受箱１５の間の空間に上記給油室１８が形成される。
油溜め室１０ｃは、軸受カバー１０の内周側に設けられ、油掻揚げ円板１２と軸受カバー１０との間の空間（後述する図１０中に示す空間１０ｂ）から漏れてくる油が溜められる。該油溜め室１０ｃは円環形状を有する。ラビリンス１０ｄは、軸受カバー１０と機外側との間に設けられ、上記油溜め室１０ｃに溜められた油が機外側に漏れないようにシールしている。すなわち、上記ラビリンス１５ｃ、１０ｄを用いたラビリンス構造によって、軸受装置内と軸受装置外はシールされている。
The bearing retainer 14 is attached to the bearing housing 15 and has an annular shape. The bearing retainer 14 is retained from the outside of the bearing housing 15 so that the bearing 13 is not detached from the bearing housing 15. The bearing cover 10 is attached to the outer side surface of the machine, and has a hole through which the rotor shaft 11 passes in the center. The bearing cover 10 is disposed so as to cover the side surface of the oil supply chamber 18, and the oil supply chamber 18 is formed in a space between the bearing cover 10 and the bearing box 15.
The oil sump chamber 10c is provided on the inner peripheral side of the bearing cover 10 and stores oil leaking from a space (a space 10b shown in FIG. 10 to be described later) between the oil-raised disk 12 and the bearing cover 10. It is done. The oil sump chamber 10c has an annular shape. The labyrinth 10d is provided between the bearing cover 10 and the outside of the machine, and seals the oil stored in the oil sump chamber 10c so as not to leak to the outside of the machine. That is, the inside of the bearing device and the outside of the bearing device are sealed by the labyrinth structure using the labyrinths 15c and 10d.
図９は、図８中に示す軸受装置を継手側から見た正面図である。図９中に示すＲは、継手２の回転半径である。 FIG. 9 is a front view of the bearing device shown in FIG. 8 viewed from the joint side. R shown in FIG. 9 is the turning radius of the joint 2.
図１０は、図８を参照して説明した車両用主電動機の軸受装置の部分拡大断面図である。
図８を参照して説明した軸受装置における、軸受１３への油の供給は、以下のようにして行われる。まず、貯油室１８ａに溜められた潤滑油が油掻揚げ円板１２の回転により上部へ掻揚げられる。この掻揚げられた潤滑油が、図１０中の矢印ａに示すように、軸受押え１４に設けられた給油穴４ａを通じて軸受１３内に導かれ、軸受１３を潤滑して、貯油室１８ａに戻される。また、該軸受１３内に導かれた油は、回転子軸１１と軸受箱１５との間の隙間を通って油溜め室１５ａに流れ込んで溜まる。一方、油掻揚げ円板１２と軸受カバー１０との間の空間１０ｂ内の油は、軸受カバー１０と回転子軸１１の隙間から、図１０の矢印ｂに示すように、油溜め室１０ｃに漏出し、油溜め室１０ｃ内に溜まる。
FIG. 10 is a partial enlarged cross-sectional view of the bearing device for the vehicle main motor described with reference to FIG. 8.
The supply of oil to the bearing 13 in the bearing device described with reference to FIG. 8 is performed as follows. First, the lubricating oil stored in the oil storage chamber 18 a is swept upward by the rotation of the oil scooping disk 12. As shown by an arrow a in FIG. 10, the scraped lubricating oil is guided into the bearing 13 through the oil supply hole 4a provided in the bearing retainer 14, lubricates the bearing 13, and returns to the oil storage chamber 18a. It is. Further, the oil guided into the bearing 13 flows into the oil sump chamber 15 a through the gap between the rotor shaft 11 and the bearing housing 15 and accumulates. On the other hand, the oil in the space 10b between the oil lifting disk 12 and the bearing cover 10 enters the oil reservoir chamber 10c from the gap between the bearing cover 10 and the rotor shaft 11 as shown by the arrow b in FIG. It leaks and accumulates in the oil sump chamber 10c.
なお、従来の具体的な車両用主電動機における油潤滑の軸受構造については、例えば特許文献２、３に記載のものが知られている。特許文献２、３に記載のものは、回転軸に取り付けられた回転板により、給油室に溜められた潤滑油を掻き揚げて軸受箱に供給するようにしたものである。上記従来の軸受装置においては、給油室や軸受箱等と機外との間をラビリンス構造によりシールし、軸受装置内の油が主電動機の機外へ漏出するのを抑制している。
しかし、図８乃至１０を参照して説明した従来の車両用主電動機の軸受装置では、以下のような問題がある。
車両用主電動機使用時に、車両用主電動機の回転子軸１１に取り付けられた継手２等の回転体が回転運動することにより、該回転体の回転半径内側の圧力が低下し、該回転半径の内側にある車両用主電動機の軸受装置近傍の空間の圧力が低下する。その結果、車両用主電動機の軸受装置内の潤滑油（図１０中の油溜め室１０ｃに溜まった潤滑油）が、ラビリンス１０ｄを通して機外に吸い出されて油漏れが発生する。油が機外に多量に漏れた場合は、軸受の潤滑不良を起こし、軸受破損の原因となる。
本発明は上記従来技術の問題点を解決するためになされたものであって、その目的は、特に潤滑油の機外への漏出を抑制することができる、車両用主電動機の油漏れ抑制構造を提供することである。
However, the conventional vehicular main motor bearing device described with reference to FIGS. 8 to 10 has the following problems.
When the vehicle main motor is used, the rotary body such as the joint 2 attached to the rotor shaft 11 of the vehicle main motor rotates, so that the pressure inside the rotation radius of the rotary body decreases, and the rotation radius The pressure in the space in the vicinity of the bearing device of the vehicle main motor inside is reduced. As a result, the lubricating oil in the bearing device of the vehicular main motor (the lubricating oil collected in the oil sump chamber 10c in FIG. 10) is sucked out of the machine through the labyrinth 10d and oil leakage occurs. If a large amount of oil leaks outside the machine, it will cause poor lubrication of the bearing and cause damage to the bearing.
The present invention has been made to solve the above-described problems of the prior art, and its object is to suppress the leakage of lubricating oil to the outside of the machine, in particular, an oil leakage suppression structure for a vehicular main motor. Is to provide.
上記課題を本発明においては、次のように解決する。
（１）回転子軸の軸受に潤滑油を供給して潤滑する軸受装置を有し、該軸受装置に対向する位置に、該回転子軸に取り付けられた回転体が設けられた車両用主電動機における油漏れ抑制構造を設ける。上記軸受装置の側面を含み上記回転体と対向する面に、この回転体が含まれる空間と区画された、上記回転体の回転半径内側と外側の空間を連通させる通路が設けられる。そして、上記通路により、回転体の回転により圧力が低下した回転体の回転半径の内側にある主電動機の軸受装置近傍の空間と回転体の回転半径外側の空間をつなぎ、回転体の回転半径内外の圧力差を緩和する。
（２）上記通路が、上記回転体の回転半径の内側から外側に連通する穴または管で構成される。
（３）上記通路は、軸受装置の側面を含む面に設けられた冷却フィンの一部を利用して構成された穴または管である。
In the present invention, the above problem is solved as follows.
(1) A vehicular main motor having a bearing device for supplying lubricating oil to a bearing of a rotor shaft and lubricating the rotor shaft, and a rotating body attached to the rotor shaft is provided at a position facing the bearing device An oil leakage suppression structure is provided. A path that includes the side surface of the bearing device and faces the rotating body is provided with a passage that communicates the space inside and outside the rotating radius of the rotating body, which is partitioned from the space including the rotating body. The passage connects the space in the vicinity of the bearing device of the main motor inside the rotation radius of the rotating body whose pressure has been reduced by the rotation of the rotating body and the space outside the rotation radius of the rotating body, so Relieve the pressure difference.
(2) The passage is constituted by a hole or a tube communicating from the inside to the outside of the rotation radius of the rotating body.
(3) The passage is a hole or a pipe configured by using a part of the cooling fin provided on the surface including the side surface of the bearing device.
本発明によれば、以下の効果を得ることができる。
（１）本発明においては、軸受装置に対向する位置に設けられた回転体の回転によって圧力が低下した該回転体の回転半径の内側にある主電動機の軸受装置近傍の空間と、該回転体の回転半径外側の空間とが、該回転体の回転半径内側と外側の空間を連通させる通路でつながれる。好ましくは、上記通路が、上記回転体の回転半径の内側から外側に連通する穴または管で構成される。
従って、本発明によれば、上記回転体の回転半径内外の圧力差が緩和され、軸受装置内の潤滑油の機外への漏出が抑制される。その結果、軸受の潤滑性能を良好に維持することができ、軸受と潤滑油の劣化低減、車両用主電動機の保守作業の低減に寄与することができる。
（２）本発明において、上記通路は、軸受装置の側面を含む面に設けられた冷却フィンの一部を利用して構成された穴または管である。従って、本発明によれば、例えば、冷却フィンの上にフタを被せることによって、上記回転体の回転半径内側と外側の空間を連通させる穴又は管を簡易に形成することが可能となる。その結果、主電動機の軸受装置内の潤滑油の機外への漏出を簡易に抑制することができる。
According to the present invention, the following effects can be obtained.
(1) In the present invention, the space in the vicinity of the bearing device of the main motor inside the rotation radius of the rotating body, the pressure of which is reduced by the rotation of the rotating body provided at a position facing the bearing device, and the rotating body The space outside the rotation radius is connected by a passage that connects the space inside and outside the rotation radius of the rotating body. Preferably, the passage is constituted by a hole or a tube communicating from the inside to the outside of the turning radius of the rotating body.
Therefore, according to the present invention, the pressure difference inside and outside the rotation radius of the rotating body is alleviated, and leakage of the lubricating oil in the bearing device to the outside of the machine is suppressed. As a result, the lubrication performance of the bearing can be maintained satisfactorily, contributing to a reduction in deterioration of the bearing and the lubricating oil and a reduction in maintenance work of the vehicle main motor.
(2) In this invention, the said channel | path is a hole or a pipe | tube comprised using a part of cooling fin provided in the surface containing the side surface of a bearing apparatus. Therefore, according to the present invention, for example, by covering the cooling fin with a lid, it is possible to easily form a hole or tube that communicates the space inside and outside the rotation radius of the rotating body. As a result, leakage of the lubricating oil in the bearing device of the main motor to the outside of the machine can be easily suppressed.
以下、本発明の実施の形態を図を参照して説明する。
図１は、本発明の実施例１の車両用主電動機の軸受装置の断面構成を示す図である。
図１には、継手２と軸受装置の断面が示される。該軸受装置は、軸受カバー１０、油掻揚げ円板１２、軸受１３、軸受押え１４、軸受箱１５、油溜め室１０ｃ、１５ａ、ラビリンス１０ｄ、１５ｃ、給油室１８、貯油室１８ａを備える。１１は車両用主電動機の回転子軸、１７は車両用主電動機の外カバー、２０は圧力緩和用連通穴である。図１に示す車両用主電動機の軸受装置が備える各構成部は、図８乃至１０を参照して前述した従来の車両用主電動機の軸受装置が備える同符号の構成部と同様である。また、図１に示す軸受装置を備える車両用主電動機を有する車両の駆動部の構成は、図７を参照して説明した車両の駆動部の構成と同様である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a cross-sectional configuration of a bearing device for a vehicle main motor according to a first embodiment of the present invention.
FIG. 1 shows a cross section of the joint 2 and the bearing device. The bearing device includes a bearing cover 10, an oil lifting disc 12, a bearing 13, a bearing retainer 14, a bearing box 15, oil sump chambers 10c and 15a, labyrinths 10d and 15c, an oil supply chamber 18, and an oil storage chamber 18a. 11 is a rotor shaft of the vehicular main motor, 17 is an outer cover of the vehicular main motor, and 20 is a pressure relief communication hole. The components included in the bearing device for the vehicle main motor shown in FIG. 1 are the same as the components having the same reference numerals provided in the conventional bearing device for the vehicle main motor described with reference to FIGS. Moreover, the structure of the drive part of the vehicle which has the main motor for vehicles provided with the bearing apparatus shown in FIG. 1 is the same as that of the drive part of the vehicle demonstrated with reference to FIG.
図１に示す軸受装置は、回転子軸１１の軸受１３に潤滑油を供給して潤滑する。継手２は、上記回転子軸１１に取り付けられている回転体である。継手２は、軸受装置に対向する位置に設けられ、回転子軸１１を中心に回転する。なお、継手２以外の回転体を回転子軸１１に取り付け、該回転体を該軸受装置に対向する位置に設けるようにしてもよい。
圧力緩和用連通穴２０は、軸受装置の側面を含み上記継手２等の回転体と対向する面（例えば、軸受カバー１０の機外側側面）に設けられる。該圧力緩和用連通穴２０は、継手２等の回転体と軸受装置の側面との間を区画して設けられる通路であって、該継手２等の回転体の回転半径内側と外側の空間を連通させる。具体的には、該圧力緩和用連通穴２０は、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間（図１中のラビリンス１０ｄ近傍の空間）と該回転体の回転半径外側の空間をつなぐ。本発明の一実施形態によれば、上記回転体の回転半径内側と外側の空間を連通させる通路を、該回転体の回転半径の内側から外側に連通する管で構成するようにしてもよい。
The bearing device shown in FIG. 1 lubricates the bearing 13 of the rotor shaft 11 by supplying lubricating oil. The joint 2 is a rotating body attached to the rotor shaft 11. The joint 2 is provided at a position facing the bearing device and rotates around the rotor shaft 11. A rotating body other than the joint 2 may be attached to the rotor shaft 11, and the rotating body may be provided at a position facing the bearing device.
The pressure relief communication hole 20 is provided on a surface (for example, the outer side surface of the bearing cover 10) that includes the side surface of the bearing device and faces the rotating body such as the joint 2. The communication hole 20 for pressure relaxation is a passage provided by partitioning a rotating body such as the joint 2 and the side surface of the bearing device, and a space inside and outside the rotation radius of the rotating body such as the joint 2. Communicate. Specifically, the communication hole 20 for pressure relaxation is formed in the space near the bearing device of the main motor (the space in the vicinity of the labyrinth 10d in FIG. 1) located inside the rotation radius of the rotating body such as the joint 2 and the rotating body. Connect the space outside the turning radius. According to an embodiment of the present invention, the passage that communicates the space inside and outside the rotation radius of the rotating body may be constituted by a pipe that communicates from the inside to the outside of the rotation radius of the rotating body.
車両用主電動機使用時に、車両用主電動機の回転子軸１１に取り付けられた継手２等の回転体が回転運動することにより、該回転体の回転半径内側にある主電動機の軸受装置近傍（図１中のラビリンス１０ｄ近傍）の圧力が低下する。該回転半径の内側にある主電動機の軸受装置近傍の圧力が低下すると、油溜め室１０ｃ内の潤滑油が、ラビリンス１０ｄを通って吸い出されて、機外に漏出しようとする。しかし、上記圧力緩和用連通穴２０が、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間（図１中のラビリンス１０ｄ近傍の空間）と該回転体の回転半径外側の空間とをつなぐことによって、該回転体の回転半径内外の圧力差が緩和される。その結果、軸受装置内の潤滑油（油溜め室１０ｃに溜まった潤滑油）のラビリンス１０ｄを通した機外への漏出が抑制される。 When the vehicle main motor is used, the rotating body such as the joint 2 attached to the rotor shaft 11 of the vehicle main motor rotates, so that the vicinity of the bearing device of the main motor inside the rotating radius of the rotating body (see FIG. 1 in the vicinity of the labyrinth 10d in 1) decreases. When the pressure in the vicinity of the bearing device of the main motor inside the turning radius decreases, the lubricating oil in the oil sump chamber 10c is sucked out through the labyrinth 10d and tends to leak out of the machine. However, the pressure relief communicating hole 20 is located inside the rotation radius of the rotating body such as the joint 2 and in the vicinity of the bearing device of the main motor (the space near the labyrinth 10d in FIG. 1) and the rotation radius of the rotating body. By connecting the outer space, the pressure difference inside and outside the rotation radius of the rotating body is alleviated. As a result, leakage of lubricating oil in the bearing device (lubricating oil accumulated in the oil sump chamber 10c) to the outside of the machine through the labyrinth 10d is suppressed.
図２は、図１中に示す軸受装置を継手側から見た正面図である。
図２を参照すると、圧力緩和用連通穴２０が、継手２の回転半径Ｒの内側にある主電動機の軸受装置近傍の空間と該継手２の回転半径外側の空間をつなぐことがわかる。
FIG. 2 is a front view of the bearing device shown in FIG. 1 viewed from the joint side.
Referring to FIG. 2, it can be seen that the pressure relief communication hole 20 connects a space near the bearing device of the main motor inside the rotation radius R of the joint 2 and a space outside the rotation radius of the joint 2.
図３は、本発明の実施例２の車両用主電動機の軸受装置の断面構成を示す図である。
図３には、継手２と軸受装置の断面が示される。該軸受装置は、軸受カバー１０、油掻揚げ円板１２、軸受１３、軸受押え１４、軸受箱１５、油溜め室１０ｃ、１５ａ、ラビリンス１０ｄ、１５ｃ、給油室１８、貯油室１８ａ、冷却フィン１９を備える。１１は車両用主電動機の回転子軸、１７は車両用主電動機の外カバー、２１はフタである。
図３に示す車両用主電動機の軸受装置が備える各構成部のうち、図１に示す車両用主電動機の軸受装置が備える構成部の符号と同符号のものは、図１に示す車両用主電動機が備える構成部と同様である。また、図２に示す軸受装置を備える車両用主電動機を有する車両の駆動部の構成は、図７を参照して説明した車両の駆動部の構成と同様である。
FIG. 3 is a diagram showing a cross-sectional configuration of a bearing device for a vehicle main motor according to a second embodiment of the present invention.
FIG. 3 shows a cross section of the joint 2 and the bearing device. The bearing device includes a bearing cover 10, an oil lifting disk 12, a bearing 13, a bearing retainer 14, a bearing box 15, oil sump chambers 10 c and 15 a, labyrinths 10 d and 15 c, an oil supply chamber 18, an oil storage chamber 18 a, and a cooling fin 19. Is provided. 11 is a rotor shaft of the vehicle main motor, 17 is an outer cover of the vehicle main motor, and 21 is a lid.
Of the components included in the bearing device for the vehicle main motor shown in FIG. 3, those having the same reference numerals as the components included in the bearing device for the vehicle main motor shown in FIG. This is the same as the constituent parts of the electric motor. Further, the configuration of the drive unit of the vehicle having the vehicular main motor including the bearing device shown in FIG. 2 is the same as the configuration of the drive unit of the vehicle described with reference to FIG.
図３に示す軸受装置は、回転子軸１１の軸受１３に潤滑油を供給して潤滑する。継手２は、上記回転子軸１１に取り付けられている回転体である。継手２は、軸受装置に対向する位置に設けられ、回転子軸１１を中心に回転する。なお、継手２以外の回転体を回転子軸１１に取り付け、該回転体を該軸受装置に対向する位置に設けるようにしてもよい。
冷却フィン１９は、軸受装置を冷却させる冷却器である。冷却フィン１９は、軸受装置の側面を含み継手２等の回転体と対向する面（軸受カバー１０の機外側側面と軸受箱１５の機外側側面）に設けられる。図３中に示す軸受装置を継手側から見た正面図である図４中に示すように、軸受装置上に複数の冷却フィン１９が設けられる。
フタ２１は、図４に示すように、軸受装置上に設けられた複数（図４中に示す例では２個）の冷却フィン１９の上に、該複数の冷却フィン１９に被さるように設けられる。フタ２１が冷却フィン１９に被さるように設けられることにより、継手２等の回転体と軸受装置の側面との間が区画され、該継手２等の回転体の回転半径内側と外側の空間を連通させる通路が形成される。該通路は、複数の冷却フィン１９の一部を利用して構成された穴または管であり、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間（図３中のラビリンス１０ｄ近傍の空間）と該回転体の回転半径外側の空間をつなぐ。
The bearing device shown in FIG. 3 lubricates the bearing 13 of the rotor shaft 11 by supplying lubricating oil. The joint 2 is a rotating body attached to the rotor shaft 11. The joint 2 is provided at a position facing the bearing device and rotates around the rotor shaft 11. A rotating body other than the joint 2 may be attached to the rotor shaft 11, and the rotating body may be provided at a position facing the bearing device.
The cooling fins 19 are coolers that cool the bearing device. The cooling fins 19 are provided on the surfaces (the outer side surface of the bearing cover 10 and the outer side surface of the bearing box 15) that include the side surfaces of the bearing device and face the rotating body such as the joint 2. As shown in FIG. 4, which is a front view of the bearing device shown in FIG. 3 viewed from the joint side, a plurality of cooling fins 19 are provided on the bearing device.
As shown in FIG. 4, the lid 21 is provided on a plurality of (two in the example shown in FIG. 4) cooling fins 19 provided on the bearing device so as to cover the plurality of cooling fins 19. . By providing the lid 21 so as to cover the cooling fin 19, the space between the rotating body such as the joint 2 and the side surface of the bearing device is partitioned, and the space inside and outside the rotational radius of the rotating body such as the joint 2 is communicated. A passage to be formed is formed. The passage is a hole or a pipe configured by using a part of the plurality of cooling fins 19 and is a space in the vicinity of the bearing device of the main motor inside the rotation radius of the rotating body such as the joint 2 (in FIG. 3). The space in the vicinity of the labyrinth 10d) is connected to the space outside the rotational radius of the rotating body.
車両用主電動機使用時に、車両用主電動機の回転子軸１１に取り付けられた継手２等の回転体が回転運動することにより、該回転体の回転半径の内側にある主電動機の軸受装置近傍（ラビリンス１０ｄ近傍）の圧力が低下する。該回転体の回転半径の内側にある主電動機の軸受装置近傍（ラビリンス１０ｄ近傍）の圧力が低下すると、油溜め室１０ｃ内の潤滑油が、ラビリンス１０ｄを通って吸い出されて、機外に漏出しようとする。しかし、上複数の冷却フィン１９の一部を利用して構成された穴または管が、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間（ラビリンス１０ｄ近傍の空間）と該回転体の回転半径外側の空間とをつなぐことによって、該回転体の回転半径内外の圧力差が緩和される。その結果、軸受装置内の潤滑油（油溜め室１０ｃに溜まった潤滑油）のラビリンス１０ｄを通した機外への漏出が防止される。 When the vehicle main motor is used, the rotating body such as the joint 2 attached to the rotor shaft 11 of the vehicle main motor rotates, so that the vicinity of the bearing device of the main motor inside the rotation radius of the rotating body ( The pressure in the vicinity of the labyrinth 10d) decreases. When the pressure in the vicinity of the main motor bearing device (near the labyrinth 10d) inside the rotating radius of the rotating body decreases, the lubricating oil in the oil sump chamber 10c is sucked out through the labyrinth 10d to the outside of the machine. Try to leak. However, a hole or a tube configured by using a part of the plurality of upper cooling fins 19 is a space in the vicinity of the bearing device of the main motor (a space in the vicinity of the labyrinth 10d) inside the rotation radius of the rotating body such as the joint 2. ) And a space outside the rotation radius of the rotating body, the pressure difference inside and outside the rotation radius of the rotating body is alleviated. As a result, the lubricating oil in the bearing device (lubricating oil accumulated in the oil sump chamber 10c) is prevented from leaking out through the labyrinth 10d.
図５は、本発明の実施例３の車両用主電動機の軸受装置の断面構成を示す図である。
図５には、継手２と軸受装置の断面が示される。該軸受装置は、軸受カバー１０、油掻揚げ円板１２、軸受１３、軸受押え１４、軸受箱１５、油溜め室１０ｃ、１５ａ、ラビリンス１０ｄ、１５ｃ、給油室１８、貯油室１８ａを備える。１１は車両用主電動機の回転子軸、１７は電動機の外カバー、２０は圧力緩和用連通穴である。
図５に示す車両用主電動機の軸受装置が備える各構成部は、図１に示す車両用主電動機の軸受装置が備える同符号の構成部と同様である。また、図５に示す軸受装置を備える車両用主電動機を有する車両の駆動部の構成は、図７を参照して説明した車両の駆動部の構成と同様である。
FIG. 5 is a diagram showing a cross-sectional configuration of a bearing device for a vehicular main motor according to a third embodiment of the present invention.
FIG. 5 shows a cross section of the joint 2 and the bearing device. The bearing device includes a bearing cover 10, an oil lifting disk 12, a bearing 13, a bearing retainer 14, a bearing box 15, oil sump chambers 10c and 15a, labyrinths 10d and 15c, an oil supply chamber 18, and an oil storage chamber 18a. Reference numeral 11 denotes a rotor shaft of a vehicle main motor, 17 denotes an outer cover of the motor, and 20 denotes a pressure relief communication hole.
The components included in the bearing device for the vehicle main motor shown in FIG. 5 are the same as the components having the same reference numerals provided in the bearing device for the vehicle main motor shown in FIG. Moreover, the structure of the drive part of the vehicle which has the main motor for vehicles provided with the bearing apparatus shown in FIG. 5 is the same as that of the drive part of the vehicle demonstrated with reference to FIG.
本発明の実施例３では、図５及び図５中に示す軸受装置を継手側から見た正面図である図６に示すように、軸受装置の側面を含み継手２等の回転体と対向する面（例えば、軸受カバー１０の機外側側面）に、複数の圧力緩和用連通穴２０を設ける。車両用主電動機使用時に、車両用主電動機の回転子軸１１に取り付けられた継手２等の回転体が回転運動することにより、該回転体の回転半径内側にある主電動機の軸受装置近傍（ラビリンス１０ｄ近傍）の圧力が低下する。該回転体の回転半径の内側にある主電動機の軸受装置近傍の圧力が低下すると、油溜め室１０ｃ内の潤滑油が、ラビリンス１０ｄを通って吸い出されて、機外に漏出しようとする。しかし、上記軸受装置の側面を含み継手２等の回転体と対向する面に設けられた各々の圧力緩和用連通穴２０が、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間（ラビリンス１０ｄ近傍の空間）と該回転体の回転半径外側の空間とをつなぐことによって、該回転体の回転半径内外の圧力差が緩和される。その結果、軸受装置内の潤滑油（油溜め室１０ｃに溜まった潤滑油）のラビリンス１０ｄを通した機外への漏出が抑制される。 In Embodiment 3 of the present invention, as shown in FIG. 6 which is a front view of the bearing device shown in FIGS. 5 and 5 when viewed from the joint side, the bearing device includes a side surface and faces a rotating body such as the joint 2. A plurality of pressure relief communication holes 20 are provided on the surface (for example, the outer side surface of the bearing cover 10). When the vehicle main motor is used, the rotating body such as the joint 2 attached to the rotor shaft 11 of the vehicle main motor rotates, so that the vicinity of the main motor bearing device (labyrinth) inside the rotating radius of the rotating body. Pressure in the vicinity of 10d) decreases. When the pressure in the vicinity of the bearing device of the main motor inside the rotating radius of the rotating body decreases, the lubricating oil in the oil sump chamber 10c is sucked out through the labyrinth 10d and tends to leak out of the machine. However, the bearing of the main motor in which each pressure relief communication hole 20 provided on the surface including the side surface of the bearing device and facing the rotating body such as the joint 2 is inside the rotation radius of the rotating body such as the joint 2. By connecting the space in the vicinity of the apparatus (the space in the vicinity of the labyrinth 10d) and the space outside the rotation radius of the rotating body, the pressure difference inside and outside the rotation radius of the rotating body is reduced. As a result, leakage of lubricating oil in the bearing device (lubricating oil accumulated in the oil sump chamber 10c) to the outside of the machine through the labyrinth 10d is suppressed.
複数の圧力緩和用連通穴２０が設けられた本発明の実施例３の車両用主電動機の軸受装置によれば、図５に示す継手１と軸受カバー１０との間の隙間Ｓの大きさが小さく、軸受装置の側面を含み継手２等の回転体と対向する面（例えば、軸受カバー１０の機外側側面）に十分な大きさの圧力緩和用連通穴２０を設けることができない場合であっても、該複数の圧力緩和用連通穴２０が、継手２等の回転体の回転半径の内側にある主電動機の軸受装置近傍の空間と該回転体の回転半径外側の空間とをつなぎ、該回転体の回転半径内外の圧力差を十分に緩和する。その結果、軸受装置内の潤滑油機外への漏出を効果的に抑制することが可能となる。 According to the bearing device for a vehicle main motor of the third embodiment of the present invention in which a plurality of pressure relief communication holes 20 are provided, the size of the gap S between the joint 1 and the bearing cover 10 shown in FIG. This is a case where the pressure relief communication hole 20 is small and cannot be provided in a sufficiently large surface (for example, the machine outer side surface of the bearing cover 10) including the side surface of the bearing device and facing the rotating body such as the joint 2. The plurality of pressure relief communication holes 20 connect the space in the vicinity of the bearing device of the main motor inside the rotation radius of the rotating body such as the joint 2 and the space outside the rotation radius of the rotating body, The pressure difference inside and outside the body's turning radius is sufficiently relaxed. As a result, it is possible to effectively suppress leakage outside the lubricating oil machine in the bearing device.
本発明の一実施形態によれば、機内側の軸受装置近傍（例えば、図１、図３、又は図５中のラビリンス１５ｃの近傍）の、該軸受装置に対向する位置に、例えば回転子軸１１を中心に回転し、機内の空気を循環させるファン（図示を省略）が設けられる。該ファンが回転すると、機内の空気が、機内に設けられた冷却器（図示を省略）側に押し出され、該空気を該冷却器で該空気を冷却することで、機内を冷却することができる。
この場合においても、前記したように軸受装置の側面を含み上記ファンと対向する面に、該ファンとの間を区画して、該ファンの回転半径内側と外側の空間を連通させる通路を設けるようにしてもよい。
該ファンが回転すると、該ファンの回転半径内側の圧力が低下し、該回転半径の内側にある機内側の軸受装置近傍（例えば、図１、図３、又は図５中のラビリンス１５ｃの近傍）の空間の圧力が低下する。該回転半径の内側にある機内側の軸受装置近傍の圧力が低下すると、油溜め室１５ａ内の潤滑油が、ラビリンス１５ｃを通って吸い出されて、機内に漏出しようとする。
しかし、上記ファンの回転半径内側と外側の空間を連通させる通路が、該ファンの回転半径の内側にある機内側の軸受装置近傍の空間（図１、図３、又は図５中のラビリンス１５ｃ近傍の空間）と該ファンの回転半径外側の空間とをつなぐことによって、該ファンの回転半径内外の圧力差が緩和される。その結果、軸受装置内の潤滑油（油溜め室１５ａに溜まった潤滑油）のラビリンス１５ｃを通した機内への漏出が抑制される。
According to one embodiment of the present invention, a rotor shaft, for example, at a position facing the bearing device in the vicinity of the bearing device inside the machine (for example, in the vicinity of the labyrinth 15c in FIG. 1, FIG. 3, or FIG. 5). A fan (not shown) that rotates around the air and circulates the air in the machine is provided. When the fan rotates, the air in the machine is pushed out to a cooler (not shown) provided in the machine, and the air can be cooled by the cooler to cool the inside of the machine. .
Also in this case, as described above, the passage that communicates the space between the inside and outside of the rotation radius of the fan is provided on the surface that includes the side surface of the bearing device and faces the fan so as to partition the fan. It may be.
When the fan rotates, the pressure inside the rotation radius of the fan decreases, and the vicinity of the bearing device inside the machine inside the rotation radius (for example, the vicinity of the labyrinth 15c in FIG. 1, FIG. 3, or FIG. 5). The pressure in the space decreases. When the pressure in the vicinity of the bearing device inside the machine inside the turning radius decreases, the lubricating oil in the oil sump chamber 15a is sucked out through the labyrinth 15c and tends to leak into the machine.
However, the passage connecting the inside and outside of the fan's rotation radius is a space in the vicinity of the bearing device inside the machine that is inside the rotation radius of the fan (in the vicinity of the labyrinth 15c in FIG. 1, FIG. 3, or FIG. 5). ) And a space outside the rotation radius of the fan, the pressure difference inside and outside the rotation radius of the fan is alleviated. As a result, leakage of the lubricating oil in the bearing device (lubricating oil accumulated in the oil reservoir 15a) into the machine through the labyrinth 15c is suppressed.
１ 車両用主電動機
２ 継手
３ 駆動装置
４ 車輪
５ 車軸
１０ 軸受カバー
１０ｂ 空間
１０ｃ、１５ａ 油溜め室
１０ｄ、１５ｃ ラビリンス
１１ 回転子軸
１２ 油掻揚げ円板
１３ 軸受
１４ 軸受押え
１５ 軸受箱
１７ 外カバー
１８ 給油室
１８ａ 貯油室
１９ 冷却フィン
２０ 圧力緩和用連通穴
２１ フタ
DESCRIPTION OF SYMBOLS 1 Vehicle main motor 2 Joint 3 Drive device 4 Wheel 5 Axle 10 Bearing cover 10b Space 10c, 15a Oil sump chamber 10d, 15c Labyrinth 11 Rotor shaft 12 Oil-drafting disk 13 Bearing 14 Bearing retainer 15 Bearing box 17 Outer cover 18 Oil supply chamber 18a Oil storage chamber 19 Cooling fin 20 Pressure relief communication hole 21 Lid
Claims (3)
上記軸受装置の側面を含み上記回転体と対向する面に、回転体との間を区画して、上記回転体の回転半径内側と外側の空間を連通させる通路が設けられ、
上記通路により、回転体の回転により圧力が低下した回転体の回転半径の内側にある主電動機の軸受装置近傍の空間と回転体の回転半径外側の空間をつなぎ、回転体の回転半径内外の圧力差を緩和する
ことを特徴とする車両用主電動機の油漏れ抑制構造。 Oil leakage in a vehicular main motor having a bearing device for supplying lubricating oil to a bearing of a rotor shaft and lubricating the rotor shaft, and a rotating body attached to the rotor shaft is provided at a position facing the bearing device A suppression structure,
A surface that includes the side surface of the bearing device and faces the rotating body is provided with a passage that partitions the space between the rotating body and communicates the space between the inside and outside of the rotating radius of the rotating body,
The passage connects the space in the vicinity of the main motor bearing device inside the rotation radius of the rotating body, the pressure of which has decreased due to the rotation of the rotating body, and the space outside the rotation radius of the rotating body. An oil leakage suppression structure for a vehicular main motor characterized in that the difference is alleviated.
ことを特徴とする請求項２に記載の車両用主電動機の油漏れ抑制構造。 3. The oil leakage of a vehicular main motor according to claim 2, wherein the passage is a hole or a pipe configured by using a part of a cooling fin provided on a surface including a side surface of the bearing device. Suppression structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007206288A JP5041908B2 (en) | 2007-08-08 | 2007-08-08 | Oil leakage suppression structure for vehicle main motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007206288A JP5041908B2 (en) | 2007-08-08 | 2007-08-08 | Oil leakage suppression structure for vehicle main motors |
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| JP2009044834A true JP2009044834A (en) | 2009-02-26 |
| JP5041908B2 JP5041908B2 (en) | 2012-10-03 |
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| JP2007206288A Expired - Fee Related JP5041908B2 (en) | 2007-08-08 | 2007-08-08 | Oil leakage suppression structure for vehicle main motors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012102831A (en) * | 2010-11-12 | 2012-05-31 | Hitachi Ltd | Labyrinth seal device and turbo machine using the same |
| WO2019218617A1 (en) * | 2018-05-17 | 2019-11-21 | 中车永济电机有限公司 | Multi-functional electric motor bearing sealing structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133404U (en) * | 1974-04-19 | 1975-11-04 | ||
| JP2003032946A (en) * | 2001-07-18 | 2003-01-31 | Toshiba Transport Eng Inc | Structure of oil lubrication bearing for vehicle motor |
| JP2006149042A (en) * | 2004-11-18 | 2006-06-08 | Yaskawa Electric Corp | Cooling apparatus of rotary electric machine |
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2007
- 2007-08-08 JP JP2007206288A patent/JP5041908B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133404U (en) * | 1974-04-19 | 1975-11-04 | ||
| JP2003032946A (en) * | 2001-07-18 | 2003-01-31 | Toshiba Transport Eng Inc | Structure of oil lubrication bearing for vehicle motor |
| JP2006149042A (en) * | 2004-11-18 | 2006-06-08 | Yaskawa Electric Corp | Cooling apparatus of rotary electric machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012102831A (en) * | 2010-11-12 | 2012-05-31 | Hitachi Ltd | Labyrinth seal device and turbo machine using the same |
| WO2019218617A1 (en) * | 2018-05-17 | 2019-11-21 | 中车永济电机有限公司 | Multi-functional electric motor bearing sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5041908B2 (en) | 2012-10-03 |
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