JP6906386B2 - Planetary gear device with bearing oil drain - Google Patents

Planetary gear device with bearing oil drain Download PDF

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JP6906386B2
JP6906386B2 JP2017139800A JP2017139800A JP6906386B2 JP 6906386 B2 JP6906386 B2 JP 6906386B2 JP 2017139800 A JP2017139800 A JP 2017139800A JP 2017139800 A JP2017139800 A JP 2017139800A JP 6906386 B2 JP6906386 B2 JP 6906386B2
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planetary gear
oil
bearing
oil drain
planetary
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JP2019019916A (en
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美穂 炭竈
美穂 炭竈
安弘 岩本
安弘 岩本
早貴 深瀬
早貴 深瀬
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Hitachi Nico Transmission Co Ltd
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Description

本発明は軸受排油口を備えた遊星歯車装置に係り、例えば、ガスタービン用遊星歯車装置等のような高速運転されるものに好適な軸受排油口を備えた遊星歯車装置に関する。 The present invention relates to a planetary gear device provided with a bearing oil drain port, and relates to a planetary gear device provided with a bearing oil drain port suitable for high-speed operation such as a planetary gear device for a gas turbine.

一般的な遊星歯車装置の構造を、図1(a)、図1(b)及び図1(c)を用いて説明する。 The structure of a general planetary gear device will be described with reference to FIGS. 1 (a), 1 (b) and 1 (c).

図1(a)、図1(b)及び図1(c)に示すように、一般的な遊星歯車装置5Aは、外歯を有する太陽歯車1と、この太陽歯車1の外歯と噛合う複数(図1(a)では3個)の遊星歯車2と、この遊星歯車2と内歯を介して噛合う内歯車4と、遊星歯車2を支持している遊星軸7と、遊星歯車2を挟んで遊星軸7を支持する第1の遊星キャリア3a及び第2の遊星キャリア3bと、太陽歯車1を回転駆動する入力軸6と、内歯車4と嵌合して回転駆動される出力軸11と、遊星歯車2の径方向荷重を支持するジャーナル軸受8と、遊星歯車2の軸方向両端に設置され、遊星歯車2の軸方向荷重を支持するスラスト軸受9a及び9bとを備え、遊星歯車2とスラスト軸受9a及び9bの間には、それぞれ軸受排油口16a及び16bが形成され、遊星軸7に形成されている給油孔15b1を介してジャーナル軸受8に供給された潤滑油が、ジャーナル軸受8の軸方向両端に流れてスラスト軸受9a及び9bに供給され軸受排油口16a及び16bから排出されるように構成されている。なお、出力軸11は、出力軸支持装置10で支持されている。 As shown in FIGS. 1 (a), 1 (b) and 1 (c), a general planetary gear device 5A meshes with a sun gear 1 having external teeth and the external teeth of the sun gear 1. A plurality of planetary gears 2 (three in FIG. 1A), an internal gear 4 that meshes with the planetary gear 2 via internal teeth, a planetary shaft 7 that supports the planetary gear 2, and a planetary gear 2. A first planetary carrier 3a and a second planetary carrier 3b that support the planetary shaft 7 with the sun gear 1 sandwiched between the two, an input shaft 6 that rotationally drives the sun gear 1, and an output shaft that is rotationally driven by being fitted with an internal gear 4. A planetary gear is provided with 11, a journal bearing 8 that supports the radial load of the planetary gear 2, and thrust bearings 9a and 9b that are installed at both ends of the planetary gear 2 in the axial direction and support the axial load of the planetary gear 2. Bearing oil drain ports 16a and 16b are formed between 2 and the thrust bearings 9a and 9b, respectively, and the lubricating oil supplied to the journal bearing 8 through the oil supply holes 15b1 formed on the planetary shaft 7 is published in the journal. It is configured so that it flows to both ends in the axial direction of the bearing 8 and is supplied to the thrust bearings 9a and 9b and discharged from the gear drain ports 16a and 16b. The output shaft 11 is supported by the output shaft support device 10.

以上の構成において、遊星歯車装置5Aは、以下のように回転駆動力を伝達する。即ち、例えば、ガスタービン用遊星歯車装置の場合、ガスタービンと連結している入力軸6が回転駆動されると、これと一体となっている太陽歯車1も同時に回転し、これと噛合う遊星歯車2が回転駆動される。更に、遊星歯車2と噛合う内歯車4が回転駆動され、これと嵌合されている出力軸11が回転駆動される。 In the above configuration, the planetary gear device 5A transmits the rotational driving force as follows. That is, for example, in the case of a planetary gear device for a gas turbine, when the input shaft 6 connected to the gas turbine is rotationally driven, the sun gear 1 integrated with the input shaft 6 also rotates at the same time and meshes with the planet gear 1. The gear 2 is rotationally driven. Further, the internal gear 4 that meshes with the planetary gear 2 is rotationally driven, and the output shaft 11 fitted to the internal gear 4 is rotationally driven.

また、このような場合、遊星歯車装置5Aは、次のような潤滑油供給機構が設けられることがある。 Further, in such a case, the planetary gear device 5A may be provided with the following lubricating oil supply mechanism.

即ち、図1(b)に示すように、オイルタンク12に溜まっている潤滑油は、フィルタ13を介してポンプ14で吸い上げられる。吸い上げられた潤滑油は、給油口15aから太陽歯車1に、給油口15bから給油孔15b1を介してジャーナル軸受8に供給される。 That is, as shown in FIG. 1B, the lubricating oil accumulated in the oil tank 12 is sucked up by the pump 14 via the filter 13. The sucked lubricating oil is supplied from the lubrication port 15a to the sun gear 1 and from the lubrication port 15b to the journal bearing 8 via the lubrication hole 15b1.

太陽歯車1に供給された潤滑油は、太陽歯車1と噛合う遊星歯車2によって掻き上げられ、内歯車4にも供給される。一方、ジャーナル軸受8に供給された潤滑油は、両軸端の方へと流れてスラスト軸受9a及び9bに供給され、遊星歯車2の側面とスラスト軸受9a及び9bの間に形成される軸受排油口16aと16bから軸受の外に流出する。 The lubricating oil supplied to the sun gear 1 is scraped up by the planetary gear 2 that meshes with the sun gear 1 and is also supplied to the internal gear 4. On the other hand, the lubricating oil supplied to the journal bearing 8 flows toward both shaft ends and is supplied to the thrust bearings 9a and 9b, and the bearing exhaust formed between the side surface of the planetary gear 2 and the thrust bearings 9a and 9b. It flows out of the bearing from the oil ports 16a and 16b.

軸受排油口16aから軸受の外に流出する潤滑油は、ほとんどが第1の遊星キャリア3aと内歯車4のすき間から内歯車4の外部へと流れ、排油口17を通りオイルタンク12へと戻る。一方、軸受排油口16bから軸受の外に流出する潤滑油は、給油口15aから供給された潤滑油と混合されて、内歯車4に囲まれた空間に停留し、その一部が第1の遊星キャリア3aと内歯車4のすき間から内歯車4の外部へと流れ、排油口17を通りオイルタンク12へと戻る。 Most of the lubricating oil that flows out of the bearing from the bearing oil drain port 16a flows from the gap between the first planet carrier 3a and the internal gear 4 to the outside of the internal gear 4, passes through the oil drain port 17, and reaches the oil tank 12. And back. On the other hand, the lubricating oil flowing out of the bearing from the bearing oil drain port 16b is mixed with the lubricating oil supplied from the oil supply port 15a and stays in the space surrounded by the internal gear 4, and a part of the lubricating oil is first. It flows from the gap between the planetary carrier 3a and the internal gear 4 to the outside of the internal gear 4, passes through the oil drain port 17, and returns to the oil tank 12.

ここで、例えば、ガスタービン用遊星歯車装置は、ガスタービンによって回転駆動されるため高速で運転される。そのため、太陽歯車、遊星歯車、内歯車のピッチ円周速は、他の産業用遊星歯車装置に比して非常に大きく、これに起因して発熱量が大きい。 Here, for example, the planetary gear device for a gas turbine is driven at high speed because it is rotationally driven by the gas turbine. Therefore, the pitch circumferential speed of the sun gear, the planetary gear, and the internal gear is very large as compared with other industrial planetary gear devices, and the amount of heat generated is large due to this.

遊星歯車装置の発熱は、非特許文献1に記載のように、歯車の噛合いによる摩擦損、潤滑油の撹拌損、軸受損が主要因子となって発生する。上記因子の中で、潤滑油の撹拌損と軸受損は占める割合が大きく、歯車のピッチ円周速の増加に伴い増加するため、ピッチ円周速が大きいガスタービン用遊星歯車装置は発熱量が大きい。また、遊星歯車装置は、他の形式の歯車装置と比してエネルギー密度が高いという特徴を有するため、前記の発熱量によって歯車が昇温しやすい。 As described in Non-Patent Document 1, the heat generated by the planetary gear device is mainly caused by friction loss due to gear meshing, stirring loss of lubricating oil, and bearing loss. Of the above factors, the stirring loss of the lubricating oil and the bearing loss account for a large proportion, and increase as the pitch circumference of the gear increases. Therefore, the planetary gear device for gas turbines having a large pitch circumference increases the calorific value. Is big. Further, since the planetary gear device has a feature that the energy density is higher than that of other types of gear devices, the temperature of the gear tends to rise due to the above-mentioned calorific value.

歯車が昇温することで、非特許文献2に記載のように、歯面に焼付き損傷が発生する可能性が高まる。従って、遊星歯車装置5Aを冷却し、歯車の昇温を抑制する必要がある。 As the temperature of the gear rises, the possibility of seizure damage on the tooth surface increases as described in Non-Patent Document 2. Therefore, it is necessary to cool the planetary gear device 5A and suppress the temperature rise of the gear.

遊星歯車装置5Aでは、前述のとおり、ジャーナル軸受8に供給された潤滑油が軸受排油口16bから内歯車4に囲まれた空間に流出して停留する。このとき、潤滑油は、軸受部において軸受損に起因する発熱量を受取り昇温する。従って、内歯車4に囲まれた空間には昇温した潤滑油が停留し、これによって歯車が昇温してしまう。 In the planetary gear device 5A, as described above, the lubricating oil supplied to the journal bearing 8 flows out from the bearing oil drain port 16b into the space surrounded by the internal gear 4 and stays there. At this time, the lubricating oil receives the calorific value caused by the bearing loss at the bearing portion and raises the temperature. Therefore, the heated lubricating oil stays in the space surrounded by the internal gear 4, which causes the gear to rise in temperature.

一方、特許文献1には、異なる方法によって歯車の昇温を抑制している。即ち、第2の遊星キャリア3bにおいて、遊星歯車2間にある柱状構造部に開口構造を設けることで、内歯車4に囲まれた空間にある潤滑油を回収し、撹拌損に起因する発熱量を減少させ、内歯車4に囲まれた空間に留まっている潤滑油の昇温を、ひいては歯車の昇温を抑制している。 On the other hand, in Patent Document 1, the temperature rise of the gear is suppressed by a different method. That is, in the second planetary carrier 3b, by providing an opening structure in the columnar structure portion between the planetary gears 2, the lubricating oil in the space surrounded by the internal gears 4 is recovered, and the calorific value due to the stirring loss is generated. The temperature rise of the lubricating oil remaining in the space surrounded by the internal gear 4 is suppressed, and the temperature rise of the gear is suppressed.

国際公開2015/050116号International release 2015/050116

Neil E. A., and Stuart H. L., “Spur-Gear-System Efficiency at Part and Full Load”, NASA Technical Paper 1622, Technical Report 79-46, 1980.Neil E. A., and Stuart H. L., “Spur-Gear-System Efficiency at Part and Full Load”, NASA Technical Paper 1622, Technical Report 79-46, 1980. 日本機械学会,歯車損傷図鑑,2006.Japan Society of Mechanical Engineers, Gear Damage Encyclopedia, 2006.

上述した特許文献1に記載の構造は、内歯車に囲まれた空間に停留している潤滑油の昇温を、ひいては歯車の昇温を抑制するため、遊星キャリアにおいて遊星歯車間にある柱状構造部に開口構造を設けることで、内歯車に囲まれた空間にある潤滑油を回収し,撹拌損に起因する昇温を、ひいては歯車の昇温を抑制している。 The structure described in Patent Document 1 described above is a columnar structure between the planetary gears in the planetary carrier in order to suppress the temperature rise of the lubricating oil staying in the space surrounded by the internal gears and thus the temperature rise of the gears. By providing an opening structure in the portion, the lubricating oil in the space surrounded by the internal gears is recovered, and the temperature rise due to the stirring loss is suppressed, and the temperature rise of the gears is suppressed.

しかしながら、上述した特許文献1に記載の遊星歯車間にある柱状構造部に開口構造を設ける構造のみでは、軸受において軸受損に起因する発熱量を受取り昇温した潤滑油が内歯車に囲まれた空間に流入することを回避できないため、これに起因した歯車の昇温を抑制できない。 However, only in the structure in which the opening structure is provided in the columnar structure between the planetary gears described in Patent Document 1 described above, the lubricating oil that receives the calorific value due to the bearing loss and raises the temperature is surrounded by the internal gears. Since it cannot be avoided that the gear flows into the space, the temperature rise of the gear due to this cannot be suppressed.

本発明は上述の点に鑑みなされたもので、その目的とするところは、内歯車に囲まれた空間に軸受損に起因する発熱量によって昇温した潤滑油の流入を回避でき、歯車の昇温を抑制できる軸受排油口を備えた遊星歯車装置を提供することにある。 The present invention has been made in view of the above points, and an object of the present invention is to prevent the inflow of lubricating oil that has been heated by the amount of heat generated due to bearing loss into the space surrounded by internal gears, and to prevent the inflow of lubricating oil. An object of the present invention is to provide a planetary gear device provided with a bearing oil drain port capable of suppressing a temperature rise.

本発明の軸受排油口を備えた遊星歯車装置は、上記目的を達成するために、外歯を有する太陽歯車と、該太陽歯車の外歯と噛合う複数の遊星歯車と、該遊星歯車と内歯を介して噛合う内歯車と、前記遊星歯車を支持している遊星軸と、前記遊星歯車を挟んで前記遊星軸を支持する第1及び第2の遊星キャリアと、前記太陽歯車を回転駆動する入力軸と、前記内歯車と嵌合して回転駆動される出力軸と、前記遊星歯車の径方向荷重を支持するジャーナル軸受と、前記遊星歯車の軸方向両端に設置され、前記遊星歯車の軸方向荷重を支持するスラスト軸受とを備え、前記遊星歯車と前記スラスト軸受の間に軸受排油口が形成され、前記遊星軸に形成されている給油孔を介して前記ジャーナル軸受に供給された潤滑油が、前記ジャーナル軸受の軸方向両端に流れて前記スラスト軸受に供給され前記軸受排油口から排出される歯車装置において、前記歯車装置は、少なくとも前記内歯車で囲まれた空間側の前記スラスト軸受を覆うように設置され、前記軸受排油口から排出される前記潤滑油を回収する排油回収カバーと、該排油回収カバーで回収された前記潤滑油を装置の外部に排出する排油排出機構とから成る排油回収装置を備えていることを特徴とする。 In order to achieve the above object, the planetary gear device provided with the bearing oil drain port of the present invention includes a sun gear having external teeth, a plurality of planetary gears that mesh with the external teeth of the sun gear, and the planetary gear. Rotate the sun gear, the internal gear that meshes via the internal teeth, the planetary shaft that supports the planetary gear, the first and second planetary carriers that support the planetary shaft with the planetary gear in between, and the sun gear. The driving input shaft, the output shaft that is rotationally driven by fitting with the internal gear, the journal bearing that supports the radial load of the planetary gear, and the planetary gear that is installed at both ends in the axial direction of the planetary gear. A thrust bearing that supports the axial load of the planetary gear is provided, and a bearing oil drain port is formed between the planetary gear and the thrust bearing, and is supplied to the journal bearing through an oil supply hole formed in the planetary shaft. In a gear device in which the lubricating oil flows to both ends in the axial direction of the journal bearing, is supplied to the thrust bearing, and is discharged from the bearing oil drain port, the gear device is at least on the space side surrounded by the internal gear. An oil drainage recovery cover that is installed so as to cover the thrust bearing and collects the lubricating oil discharged from the bearing oil drain port and the lubricating oil recovered by the oil drainage recovery cover are discharged to the outside of the apparatus. It is characterized by being provided with an oil drainage recovery device including a drainage drainage mechanism.

本発明によれば、内歯車に囲まれた空間に軸受損に起因する発熱量によって昇温した潤滑油の流入を回避でき、歯車の昇温を抑制できる軸受排油口を備えた遊星歯車装置を得ることができる。 According to the present invention, a planetary gear provided with a bearing oil drain port that can prevent the inflow of lubricating oil that has been heated by the amount of heat generated due to bearing loss into the space surrounded by the internal gear and can suppress the temperature rise of the gear. You can get the device.

一般的な遊星歯車装置における歯車の必要最小限の構成を示す図である。It is a figure which shows the minimum necessary structure of a gear in a general planetary gear device. 一般的な遊星歯車装置の構成を一部破断して示す斜視図である。It is a perspective view which shows the structure of a general planetary gear device partially broken. 図1(b)における遊星軸の近傍を示す部分断面図である。It is a partial cross-sectional view which shows the neighborhood of a planetary axis in FIG. 1 (b). 本発明の軸受排油口を備えた遊星歯車装置の実施例1における遊星軸の近傍を示す部分斜視図である。It is a partial perspective view which shows the vicinity of the planetary axis in Example 1 of the planetary gear apparatus provided with the bearing oil drain port of this invention. 本発明の軸受排油口を備えた遊星歯車装置の実施例1における軸受排油回収装置の概略構成を一部破断して示す斜視図である。It is a perspective view which shows the schematic structure of the bearing oil drainage recovery device in Example 1 of the planetary gear device provided with the bearing oil drainage port of this invention partially broken. 本発明の軸受排油口を備えた遊星歯車装置の実施例2における遊星軸の近傍を示す部分斜視図である。It is a partial perspective view which shows the vicinity of the planetary axis in Example 2 of the planetary gear apparatus provided with the bearing oil drain port of this invention. 本発明の軸受排油口を備えた遊星歯車装置の実施例2における軸受排油回収装置の概略構成を一部破断して示す斜視図である。It is a perspective view which shows the schematic structure of the bearing oil drainage recovery device in Example 2 of the planetary gear device provided with the bearing oil drainage port of this invention partially broken. 本発明の軸受排油口を備えた遊星歯車装置の実施例3における遊星軸の近傍を示す部分斜視図であるIt is a partial perspective view which shows the vicinity of the planetary axis in Example 3 of the planetary gear device provided with the bearing oil drain port of this invention. 本発明の軸受排油口を備えた遊星歯車装置の実施例3における軸受排油回収装置の概略構成を一部破断して示す斜視図である。It is a perspective view which shows the schematic structure of the bearing oil drainage recovery device in Example 3 of the planetary gear device provided with the bearing oil drainage port of this invention partially broken. 本発明の軸受排油口を備えた遊星歯車装置の実施例4における遊星軸の近傍を示す部分斜視図である。It is a partial perspective view which shows the vicinity of the planetary axis in Example 4 of the planetary gear device provided with the bearing oil drain port of this invention. 本発明の軸受排油口を備えた遊星歯車装置の実施例4における軸受排油回収装置の概略構成を一部破断して示す斜視図である。It is a perspective view which shows the schematic structure of the bearing oil drainage recovery device in Example 4 of the planetary gear device provided with the bearing oil drainage port of this invention partially broken. 本発明の軸受排油口を備えた遊星歯車装置の実施例における遊星軸の近傍を示す部分斜視図である。It is a partial perspective view which shows the vicinity of the planetary axis in the Example of the planetary gear device provided with the bearing oil drain port of this invention.

以下、図示した実施例に基づいて本発明の軸受排油口を備えた遊星歯車装置を説明する。なお、各実施例において、同一構成部品には同符号を使用する。 Hereinafter, the planetary gear device provided with the bearing oil drain port of the present invention will be described based on the illustrated embodiment. In each embodiment, the same reference numerals are used for the same components.

本発明の軸受排油口を備えた遊星歯車装置の実施例1としての遊星歯車装置5Bの構造を、図2及び図3を用いて説明する。 The structure of the planetary gear device 5B as the first embodiment of the planetary gear device provided with the bearing oil drain port of the present invention will be described with reference to FIGS. 2 and 3.

図2及び図3に示すように、本実施例の遊星歯車装置5Bは、図1(a)、図1(b)及び図1(c)を用いて説明した一般的な遊星歯車装置5Aと同様に、外歯を有する太陽歯車1と、この太陽歯車1の外歯と噛合う複数の遊星歯車2と、この遊星歯車2と内歯を介して噛合う内歯車4と、遊星歯車2を支持している遊星軸7と、遊星歯車2を挟んで遊星軸7を支持する第1の遊星キャリア3a及び第2の遊星キャリア3bと、太陽歯車1を回転駆動する入力軸6と、内歯車4と嵌合して回転駆動される出力軸11と、遊星歯車2の径方向荷重を支持するジャーナル軸受8と、遊星歯車2の軸方向両端に設置され、遊星歯車2の軸方向荷重を支持するスラスト軸受9a及び9bとを備え、遊星歯車2とスラスト軸受9a及び9bの間には、それぞれ軸受排油口16a及び16bが形成され、遊星軸7に形成されている給油孔15b1を介してジャーナル軸受8に供給された潤滑油が、ジャーナル軸受8の軸方向両端に流れてスラスト軸受9a及び9bに供給され軸受排油口16a及び16bから排出されるように構成されている。なお、出力軸11は、出力軸支持装置10で支持されている。 As shown in FIGS. 2 and 3, the planetary gear device 5B of this embodiment is the same as the general planetary gear device 5A described with reference to FIGS. 1 (a), 1 (b) and 1 (c). Similarly, a sun gear 1 having external teeth, a plurality of planetary gears 2 that mesh with the external teeth of the sun gear 1, an internal gear 4 that meshes with the planetary gear 2 via the internal teeth, and a planetary gear 2 A supporting planetary shaft 7, a first planetary carrier 3a and a second planetary carrier 3b that support the planetary shaft 7 with the planetary gear 2 sandwiched between them, an input shaft 6 that rotationally drives the sun gear 1, and an internal gear. An output shaft 11 that is fitted with 4 and driven to rotate, a journal bearing 8 that supports the radial load of the planetary gear 2, and an axial load of the planetary gear 2 that are installed at both ends in the axial direction of the planetary gear 2 are supported. The thrust bearings 9a and 9b are provided, and the bearing oil drain ports 16a and 16b are formed between the planetary gear 2 and the thrust bearings 9a and 9b, respectively, via the oil supply holes 15b1 formed on the planetary shaft 7. The lubricating oil supplied to the journal bearing 8 is configured to flow to both ends in the axial direction of the journal bearing 8 and to be supplied to the thrust bearings 9a and 9b and discharged from the bearing oil drain ports 16a and 16b. The output shaft 11 is supported by the output shaft support device 10.

そして、本実施例では、遊星歯車装置5Bは、少なくとも内歯車4で囲まれた空間側のスラスト軸受9bを覆うように設置され、軸受排油口16bから排出される潤滑油を回収する排油回収カバー18と、この排油回収カバー18で回収された潤滑油を装置の外部に排出する排油排出機構とから成る排油回収装置20aを備えていることを特徴とする。 Then, in this embodiment, the planetary gear device 5B is installed so as to cover at least the thrust bearing 9b on the space side surrounded by the internal gear 4, and is a drainage oil that collects the lubricating oil discharged from the bearing oil drainage port 16b. It is characterized by comprising a drainage recovery device 20a including a recovery cover 18 and a drainage discharge mechanism for discharging the lubricating oil recovered by the drainage recovery cover 18 to the outside of the device.

上述した排油排出機構は、排油回収カバー18に一端が接続された排油管19aと、第2の遊星キャリア3bに形成され、排油管19aの他端に一端が接続された第1の排油孔19bと、この第1の排油孔19bに接続された第2の排油孔19cと、第1の遊星キャリア3aに形成され、第2の排油孔19cの他端に一端が接続された第3の排油孔19dとから構成されている。 The above-mentioned oil drainage mechanism is a first drainage pipe 19a having one end connected to the oil drainage recovery cover 18 and a first drainage pipe 19a formed on the second planetary carrier 3b and having one end connected to the other end of the oil drainage pipe 19a. The oil hole 19b, the second oil drain hole 19c connected to the first oil drain hole 19b, and the first planet carrier 3a are formed, and one end is connected to the other end of the second oil drain hole 19c. It is composed of a third oil drain hole 19d.

また、第2の遊星キャリア3bは、遊星軸7を支持する円板状部材3b1と、この円板状部材3b1と一体に形成され、円板状部材3b1から軸方向(図3の下方向)に伸延し、その先端部にフランジ部3b3を有し、フランジ部3b3を介して円板状の第1の遊星キャリア3aが接続される柱部材3b2とから構成され、第2の遊星キャリア3bの円板状部材3b1に上述した第1の排油孔19bが、第2の遊星キャリア3bの柱部材3b2に第2の排油孔19cが、第1の遊星キャリア3aに第3の排油孔19dがそれぞれ形成され、第1の排油孔19bの一端が排油管19aに、第1の排油孔19bの他端が第2の排油孔19cの一端に、第2の排油孔19cの他端が第3の排油孔19dの一端にそれぞれ接続され、第3の排油孔19dの他端は、潤滑油を装置の外部に排出する排油口17となっている。 Further, the second planetary carrier 3b is formed integrally with the disc-shaped member 3b1 that supports the planetary shaft 7 and the disc-shaped member 3b1, and is axially oriented from the disc-shaped member 3b1 (downward in FIG. 3). A pillar member 3b2 having a flange portion 3b3 at its tip and to which a disk-shaped first planetary carrier 3a is connected via the flange portion 3b3. The first oil drain hole 19b described above in the disk-shaped member 3b1, the second oil drain hole 19c in the pillar member 3b2 of the second planet carrier 3b, and the third oil drain hole in the first planet carrier 3a. 19d are formed respectively, one end of the first oil drain hole 19b is in the oil drain pipe 19a, the other end of the first oil drain hole 19b is in one end of the second oil drain hole 19c, and the second oil drain hole 19c. The other end of the third oil drain hole 19d is connected to one end of the third oil drain hole 19d, and the other end of the third oil drain hole 19d is an oil drain port 17 for discharging lubricating oil to the outside of the apparatus.

また、第1の排油孔19bは、排油管19aと接続される側とは反対側の端部に、この端部を封止するため排油孔キャップ21が設置されている。 Further, the first oil drain hole 19b is provided with an oil drain hole cap 21 at an end opposite to the side connected to the oil drain pipe 19a in order to seal the end.

更に、上述した排油回収カバー18はL字状を成し、このL字状の一方側(図2の符号18a)がスラスト軸受9bの側面に固定され、L字状の他方側(図2の符号18b)がスラスト軸受9bの外周を覆うように構成されている。そして、排油回収カバー18は、L字状の他方側(図2の符号18b)の遊星歯車2と隣接している部分がラビリンスパッキン等のシール構造となっている。 Further, the above-mentioned oil drainage recovery cover 18 has an L-shape, and one side of the L-shape (reference numeral 18a in FIG. 2) is fixed to the side surface of the thrust bearing 9b, and the other side of the L-shape (FIG. 2). Reference numeral 18b) is configured to cover the outer periphery of the thrust bearing 9b. The oil drainage recovery cover 18 has a seal structure such as a labyrinth packing at a portion adjacent to the planetary gear 2 on the other side (reference numeral 18b in FIG. 2) of the L shape.

即ち、図2に示すように、排油回収カバー18はL字状を成し、L字状の一方側が空間内に軸受排油口16bを備えるスラスト軸受9bの側面に固定され、L字状の他方側がスラスト軸受9bの外周を覆う構造となっている。排油回収カバー18のうち、遊星歯車2と隣接している部分(L字状の他方側)は、ラビリンスパッキン等のシール構造となっている。また、排油回収カバー18は、排油管19aと接続するための穴が形成されている。 That is, as shown in FIG. 2, the oil drainage recovery cover 18 has an L-shape, and one side of the L-shape is fixed to the side surface of a thrust bearing 9b having a bearing oil drainage port 16b in the space, and has an L-shape. The other side of the thrust bearing 9b has a structure that covers the outer periphery of the thrust bearing 9b. The portion of the oil drainage recovery cover 18 adjacent to the planetary gear 2 (the other side of the L-shape) has a seal structure such as a labyrinth packing. Further, the oil drainage recovery cover 18 is formed with a hole for connecting to the oil drainage pipe 19a.

なお、排油管19aは、第1の排油孔19bと接続しても良いし、第2の排油孔19cと直接接続しても良い。即ち、第2の排油孔19cの一端が排油管19aに、第2の排油孔19cの他端が第3の排油孔19dの一端にそれぞれ直接接続しても良い。 The oil drain pipe 19a may be connected to the first oil drain hole 19b or may be directly connected to the second oil drain hole 19c. That is, one end of the second oil drain hole 19c may be directly connected to the oil drain pipe 19a, and the other end of the second oil drain hole 19c may be directly connected to one end of the third oil drain hole 19d.

ただし、排油管19aを第2の排油孔19cと直接接続する場合は、第1の排油孔19bと排油孔キャップ21は不要である。 However, when the oil drain pipe 19a is directly connected to the second oil drain hole 19c, the first oil drain hole 19b and the oil drain hole cap 21 are unnecessary.

図3に示すように、第1の遊星キャリア3aは、第3の排油孔19dを備えているが、この第3の排油孔19dは、第2の排油孔19cと接続される側とは反対側の端部が排油口17となっており、この排油口17から遊星歯車装置5Bの外部に排油が流出される。 As shown in FIG. 3, the first planetary carrier 3a includes a third oil drain hole 19d, and the third oil drain hole 19d is on the side connected to the second oil drain hole 19c. The end on the opposite side is the oil drain port 17, and the oil is discharged from the oil drain port 17 to the outside of the planetary gear device 5B.

次に、本実施例の遊星歯車装置5Bにおける潤滑油の流れにつて説明する。 Next, the flow of the lubricating oil in the planetary gear device 5B of this embodiment will be described.

先ず、図1(b)に示すオイルタンク12に溜まっている潤滑油は、フィルタ13を介してポンプ14で吸い上げられ、吸い上げられた潤滑油は、図2に示す給油口15bから給油孔15b1を介してジャーナル軸受8に供給される。ジャーナル軸受8に供給された潤滑油は、両軸端の方へと流れてスラスト軸受9a及び9bに供給され、遊星歯車2の側面とスラスト軸受9a及び9bの間に形成される軸受排油口16aと16bから軸受の外に排出されるが、本実施例では、排油回収カバー18があるため、軸受排油口16bから排油された潤滑油は、回収カバー18によって回収される。排油回収カバー18によって回収された潤滑油は、排油管19a、第1の排油孔19b、第2の排油孔19c、第3の排油孔19dを通って、排油口17から遊星歯車装置5Bの外部に排出される。 First, the lubricating oil accumulated in the oil tank 12 shown in FIG. 1 (b) is sucked up by the pump 14 via the filter 13, and the sucked-up lubricating oil passes through the oil supply holes 15b1 from the oil supply port 15b shown in FIG. It is supplied to the journal bearing 8 via the journal bearing 8. The lubricating oil supplied to the journal bearing 8 flows toward both shaft ends and is supplied to the thrust bearings 9a and 9b, and the bearing oil drain port formed between the side surface of the planetary gear 2 and the thrust bearings 9a and 9b. Although the oil is discharged from the bearings 16a and 16b to the outside of the bearing, in this embodiment, since the oil drainage recovery cover 18 is provided, the lubricating oil discharged from the bearing oil drainage port 16b is recovered by the recovery cover 18. The lubricating oil recovered by the oil drainage recovery cover 18 passes through the oil drainage pipe 19a, the first oil drainage hole 19b, the second oil drainage hole 19c, and the third oil drainage hole 19d, and is a planet from the oil drainage port 17. It is discharged to the outside of the gear device 5B.

また、上記した排油回収装置20aは、以下の手順で製造されることが望ましい。 Further, it is desirable that the above-mentioned waste oil recovery device 20a is manufactured by the following procedure.

即ち、排油回収カバー18は、例えば炭素鋼や構造用合金鋼などで製作し、切削加工によって形成され、また、排油管19aと接続するために、円筒面に穴あけ加工が施されて接続穴が形成されている。一方、排油管19aは、例えば配管用合金鋼鋼管や機械構造用合金鋼鋼管などで製作される。 That is, the oil drainage recovery cover 18 is made of, for example, carbon steel or structural alloy steel, and is formed by cutting. In order to connect to the oil drainage pipe 19a, the cylindrical surface is drilled to form a connection hole. Is formed. On the other hand, the oil drain pipe 19a is manufactured of, for example, an alloy steel pipe for piping, an alloy steel pipe for machine structure, or the like.

また、第1の排油孔19bと第2の排油孔19cを備える第2の遊星キャリア3bは、例えば炭素鋼、構造用合金鋼、鋳鉄などで製作され、切削加工または鋳造によって形成されている。概形に形成された後、第1の排油孔19bを形成するために、第2の遊星キャリア3bの外周側(排油孔キャップ21で封止される側)から穴あけ加工を行う。次に、第2の排油孔19cを製作するために、第2の遊星キャリア3bと第1の遊星キャリア3aの接触面側から穴あけ加工を行う。 Further, the second planetary carrier 3b provided with the first oil drain hole 19b and the second oil drain hole 19c is manufactured of, for example, carbon steel, structural alloy steel, cast iron, etc., and is formed by cutting or casting. There is. After being formed into a rough shape, holes are drilled from the outer peripheral side (the side sealed by the oil drain hole cap 21) of the second planet carrier 3b in order to form the first oil drain hole 19b. Next, in order to manufacture the second oil drain hole 19c, a hole is drilled from the contact surface side of the second planet carrier 3b and the first planet carrier 3a.

第3の排油孔19dを備える第1の遊星キャリア3aは、例えば構造用合金鋼などで製作され、切削加工によって形成される。概形に形成された後、第3の排油孔19dを形成するために穴あけ加工が行われる。 The first planetary carrier 3a provided with the third oil drain hole 19d is made of, for example, structural alloy steel, and is formed by cutting. After being formed into a rough shape, a drilling process is performed to form a third oil drain hole 19d.

また、上記した排油回収装置20aは、以下の方法で組立てられることが望ましい。 Further, it is desirable that the above-mentioned waste oil recovery device 20a is assembled by the following method.

即ち、既に組み立てられた遊星歯車2、第1の遊星キャリア3a、遊星軸7、スラスト軸受9a及び9bに対して、排油回収カバー18を図2に示す位置に設置し、排油回収カバー18は、スラスト軸受9bの側面に、例えばボルト締結や溶接などで固定される。 That is, the oil drainage recovery cover 18 is installed at the position shown in FIG. 2 with respect to the already assembled planetary gear 2, the first planetary carrier 3a, the planetary shaft 7, and the thrust bearings 9a and 9b, and the oil drainage recovery cover 18 is installed. Is fixed to the side surface of the thrust bearing 9b by, for example, bolting or welding.

排油管19aは、例えばねじ込みや溶接によって排油回収カバー18に接続される。第2の遊星キャリア3bには予め、例えば圧入などで排油孔キャップ21が設置されており、この第2の遊星キャリア3bは、第2の遊星キャリア3bの柱部材3b2のフランジ部3b3が、例えばボルト締結などで締結されて第1の遊星キャリア3aに設置される。その後、排油管19aが、例えば溶接などで第2の遊星キャリア3bに接続される。このときの作業性向上のために、第2の遊星キャリア3bには、各所に肉抜き構造を設けても良い。 The oil drain pipe 19a is connected to the oil drain recovery cover 18 by, for example, screwing or welding. An oil drain hole cap 21 is installed in advance on the second planet carrier 3b, for example, by press-fitting, and the second planet carrier 3b has a flange portion 3b3 of a pillar member 3b2 of the second planet carrier 3b. For example, it is fastened by bolt fastening or the like and installed on the first planet carrier 3a. After that, the oil drain pipe 19a is connected to the second planet carrier 3b by welding or the like. In order to improve workability at this time, the second planet carrier 3b may be provided with a lightening structure at various places.

このような本実施例の遊星歯車装置5Bとすることにより、以下のような効果が得られる。 By using the planetary gear device 5B of this embodiment as described above, the following effects can be obtained.

即ち、ジャーナル軸受8において、軸受損が発生して昇温した潤滑油が、軸受排油口16bから排出されると、排油回収カバー18によって回収され、排油回収カバー18によって回収された潤滑油は、排油管19a、第1の排油孔19b、第2の排油孔19c、第3の排油孔19dを通って、遊星歯車装置5Bの外部に排出される。 That is, in the journal bearing 8, when the lubricating oil whose temperature has risen due to bearing loss is discharged from the bearing oil drain port 16b, it is recovered by the oil drain recovery cover 18 and recovered by the oil drain recovery cover 18. The lubricating oil is discharged to the outside of the planetary gear device 5B through the oil drain pipe 19a, the first oil drain hole 19b, the second oil drain hole 19c, and the third oil drain hole 19d.

従って、本実施例によれば、内歯車4に囲まれた空間において、歯車を冷却している潤滑油と混合することを回避できので、内歯車4に囲まれた空間に留まっている潤滑油の昇温を抑制でき、これによって、歯車を従来よりも効果的に冷却でき、歯面の焼付き損傷を回避できる。 Therefore, according to the present embodiment, it is possible to avoid mixing the gear with the lubricating oil that cools the gear in the space surrounded by the internal gear 4, so that the lubricating oil staying in the space surrounded by the internal gear 4 can be avoided. It is possible to suppress the temperature rise of the gear, thereby cooling the gear more effectively than before, and avoiding seizure damage to the tooth surface.

つまり、本実施例の構成とすることで、軸受損に起因する発熱量によって昇温した潤滑油が、排油回収カバーにより内歯車に囲まれた空間に流入することを回避でき、内歯車に囲まれた空間に停留している潤滑油の昇温を抑制できる。これによって歯車の昇温を抑制でき、ひいては歯面の焼付き損傷を回避できる。 That is, by adopting the configuration of this embodiment, it is possible to prevent the lubricating oil that has been heated by the amount of heat generated due to the bearing loss from flowing into the space surrounded by the internal gears by the drainage recovery cover, and the internal gears. It is possible to suppress the temperature rise of the lubricating oil staying in the space surrounded by. As a result, the temperature rise of the gear can be suppressed, and thus the seizure damage of the tooth surface can be avoided.

本発明の軸受排油口を備えた遊星歯車装置の実施例2としての遊星歯車装置5Cの構造を、図4(a)及び図4(b)を用いて説明する。 The structure of the planetary gear device 5C as the second embodiment of the planetary gear device provided with the bearing oil drain port of the present invention will be described with reference to FIGS. 4 (a) and 4 (b).

該図に示す本実施例の遊星歯車装置5Cは、実施例1で説明した遊星歯車装置5Bとほとんど同様な構成であるが、本実施例では、遊星歯車2が、ジャーナル軸受8側が出力軸11側に突出する遊星歯車ボス2aを備えている点が実施例1と異なる。 The planetary gear device 5C of the present embodiment shown in the figure has almost the same configuration as the planetary gear device 5B described in the first embodiment, but in the present embodiment, the planetary gear 2 has the output shaft 11 on the journal bearing 8 side. It differs from the first embodiment in that it is provided with a planetary gear boss 2a projecting to the side.

本実施例の排油回収装置20bは、排油回収カバー18、排油管19a、第1の排油孔19b、第2の排油孔19c、第3の排油孔19d、排油孔キャップ21、排油口17によって構成されており、遊星歯車2が、ジャーナル軸受8側が出力軸11側に突出する遊星歯車ボス2aを備えていると共に、軸受排油口16b1は、遊星歯車ボス2aとスラスト軸受9b1の間に形成され、この軸受排油口16b1の位置と、排油回収カバー18と遊星歯車2のシール構造部分の位置が軸方向にずれていることを特徴としており、その構造、製造方法、組立て方法は、実施例1と同様である。 The oil drainage recovery device 20b of this embodiment includes an oil drainage recovery cover 18, an oil drainage pipe 19a, a first oil drainage hole 19b, a second oil drainage hole 19c, a third oil drainage hole 19d, and an oil drainage hole cap 21. The planetary gear 2 is provided with a planetary gear boss 2a whose journal bearing 8 side projects toward the output shaft 11 side, and the bearing oil drain port 16b1 is provided with a planetary gear boss 2a and a thrust. It is formed between bearings 9b1 and is characterized in that the position of the bearing oil drain port 16b1 and the position of the seal structure portion of the oil drain recovery cover 18 and the planetary gear 2 are axially deviated from each other. The method and the assembling method are the same as those in the first embodiment.

このような本実施例の遊星歯車装置5Cとすることにより、以下のような効果が得られる。 By using the planetary gear device 5C of this embodiment as described above, the following effects can be obtained.

即ち、ジャーナル軸受8において昇温した潤滑油が、軸受排油口16b1から排出されると、排油回収カバー18によって回収されるが、このとき、遊星歯車ボス2aがあることによって、遊星歯車ボス2aとスラスト軸受9b1の間に形成される軸受排油口16b1の位置と、排油回収カバー18と遊星歯車2の隣接部分(シール構造部分)の位置が軸方向にずれているので、軸受排油口16b1から直接、排油回収カバー18と遊星歯車2のシール構造部分に排油が流れないので、排油をより回収しやすくなる。 That is, when the lubricating oil that has been heated in the journal bearing 8 is discharged from the bearing oil drain port 16b1, it is recovered by the oil drain recovery cover 18. At this time, the presence of the planetary gear boss 2a causes the planetary gear boss. Since the position of the bearing oil drain port 16b1 formed between 2a and the thrust bearing 9b1 and the position of the adjacent portion (seal structure portion) between the oil drain recovery cover 18 and the planetary gear 2 are displaced in the axial direction, the bearing is drained. Since the drainage does not flow directly from the oil port 16b1 to the seal structure portion of the oil drainage recovery cover 18 and the planetary gear 2, it becomes easier to recover the drainage oil.

従って、本実施例によれば、実施例1と同様な効果が得られることは勿論、内歯車4に囲まれた空間にある潤滑油の昇温をより抑制できる。これによって、歯車をより効果的に冷却でき、歯面の焼付き損傷を回避できる。 Therefore, according to the present embodiment, not only the same effect as that of the first embodiment can be obtained, but also the temperature rise of the lubricating oil in the space surrounded by the internal gear 4 can be further suppressed. This allows the gears to be cooled more effectively and avoids seizure damage to the tooth surface.

本発明の軸受排油口を備えた遊星歯車装置の実施例3としての遊星歯車装置5Dの構造を、図5(a)及び図5(b)を用いて説明する。 The structure of the planetary gear device 5D as the third embodiment of the planetary gear device provided with the bearing oil drain port of the present invention will be described with reference to FIGS. 5 (a) and 5 (b).

該図に示す本実施例の遊星歯車装置5Dは、実施例1で説明した遊星歯車装置5Bとほとんど同様な構成であるが、本実施例では、内歯車4に囲まれた空間にない軸受排油口16aからの排油も回収する構造を備えている点が実施例1と異なる。 The planetary gear device 5D of the present embodiment shown in the figure has almost the same configuration as the planetary gear device 5B described in the first embodiment, but in the present embodiment, the bearing exhaust is not in the space surrounded by the internal gear 4. It is different from the first embodiment in that it has a structure for recovering the drained oil from the oil port 16a.

即ち、本実施例では、第1の遊星キャリア3aに、排油回収カバー18で外周が覆われたスラスト軸受9bとは反対側に配置されたスラスト軸受9aを覆うように第2の排油回収カバー22が設置され、この第2の排油回収カバー22と、排油回収カバー18で外周が覆われたスラスト軸受9bとは反対側に配置されたスラスト軸受9aとの間に空間Pが形成され、この空間Pと連通する第4の排油孔19eが第1の遊星キャリア3aに形成されていることを特徴としており、その構造、製造方法、組立て方法は、実施例1と同様である。 That is, in this embodiment, the first planetary carrier 3a covers the thrust bearing 9a arranged on the side opposite to the thrust bearing 9b whose outer periphery is covered with the oil drainage recovery cover 18. A cover 22 is installed, and a space P is formed between the second oil drainage recovery cover 22 and the thrust bearing 9a arranged on the opposite side of the thrust bearing 9b whose outer periphery is covered with the oil drainage recovery cover 18. A fourth oil drain hole 19e communicating with the space P is formed in the first planetary carrier 3a, and its structure, manufacturing method, and assembly method are the same as those in the first embodiment. ..

上記した第2の排油回収カバー22はL字状を成し、このL字状の一方側が第1の遊星キャリア3aに固定され、L字状の他方側が排油回収カバー18で外周が覆われたスラスト軸受9bとは反対側の配置されたスラスト軸受9aの外周を覆うと共に、その先端が遊星歯車2と隣接している部分がラビリンスパッキン等のシール構造となっている。 The second oil drainage recovery cover 22 described above has an L-shape, one side of the L-shape is fixed to the first planetary carrier 3a, and the other side of the L-shape is covered with the oil drainage recovery cover 18. The outer periphery of the thrust bearing 9a arranged on the opposite side of the thrust bearing 9b is covered, and the portion whose tip is adjacent to the planetary gear 2 has a seal structure such as a labyrinth packing.

また、第4の排油孔19eの空間Pと連通する側とは反対側は、潤滑油を装置の外部に排出する排油口17aとなっており、第2の排油回収カバー22、第4の排油孔19e及び排油口17aで第2の排油回収装置20a1を構成している。 Further, the side of the fourth oil drain hole 19e opposite to the side communicating with the space P is an oil drain port 17a for discharging the lubricating oil to the outside of the apparatus, and the second oil drain recovery cover 22 and the second The oil drain hole 19e and the oil drain port 17a of No. 4 constitute a second oil drain recovery device 20a1.

上記した第2の排油回収装置20a1は、以下の手順で製造されることが望ましい。 It is desirable that the second oil drainage recovery device 20a1 described above is manufactured by the following procedure.

即ち、排油回収カバー22は、例えば炭素鋼や構造用合金鋼などで製作され、切削加工によって形成されている。また、第4の排油孔19eを備える第1の遊星キャリア3aは、例えば構造用合金鋼などで製作され、切削加工によって形成されている。概形に形成された後、第4の排油孔19eを形成するために穴あけ加工が施されている。 That is, the oil drainage recovery cover 22 is made of, for example, carbon steel or structural alloy steel, and is formed by cutting. Further, the first planetary carrier 3a provided with the fourth oil drain hole 19e is made of, for example, structural alloy steel, and is formed by cutting. After being formed into a rough shape, a hole is drilled to form a fourth oil drain hole 19e.

更に、図5(a)に示すように、第1の遊星キャリア3aは、第4の排油孔19eを備えており、この第4の排油孔19eは、スラスト軸受9aと、スラスト軸受9aの外周を覆っている排油回収カバー22とで形成されている空間Pに接続されているので、排油口17aから遊星歯車装置5Dの外部に排油の流出が可能となる。 Further, as shown in FIG. 5A, the first planetary carrier 3a includes a fourth oil drain hole 19e, and the fourth oil drain hole 19e includes a thrust bearing 9a and a thrust bearing 9a. Since it is connected to the space P formed by the oil drainage recovery cover 22 that covers the outer periphery of the oil drainage port 17a, the drainage oil can flow out from the oil drainage port 17a to the outside of the planetary gear device 5D.

また、上記した第2の排油回収装置20a1は、以下の方法で組立てられることが望ましい。 Further, it is desirable that the second oil drainage recovery device 20a1 described above is assembled by the following method.

即ち、第1の遊星キャリア3aに遊星歯車2を組み付ける前に、排油回収カバー22を図5(a)に示す位置に設置し、第1の遊星キャリア3aに、例えばボルト締結や溶接などで固定する。 That is, before assembling the planetary gear 2 to the first planetary carrier 3a, the oil drainage recovery cover 22 is installed at the position shown in FIG. 5A, and is attached to the first planetary carrier 3a by, for example, bolting or welding. Fix.

このような本実施例の遊星歯車装置5Dとすることにより、以下のような効果が得られる。 By using the planetary gear device 5D of this embodiment as described above, the following effects can be obtained.

即ち、ジャーナル軸受8において昇温した潤滑油が、軸受排油口16a、16bから排出されると、排油回収カバー18と第2の排油回収カバー22によって回収される。第2の排油回収装置20a1を備えなくとも、軸受排油口16aから排出した潤滑油は、内歯車4に囲まれた空間において歯車を冷却している潤滑油と混合することはほとんどないが、第2の排油回収装置20a1を備えることで、より確実に内歯車4に囲まれた空間にある潤滑油の昇温を抑制できる。これによって、実施例1と同様な効果が得られることは勿論、歯車をより効果的に冷却でき、歯面の焼付き損傷を回避できる。 That is, when the lubricating oil that has been heated in the journal bearing 8 is discharged from the bearing oil drain ports 16a and 16b, it is recovered by the oil drain recovery cover 18 and the second oil drain recovery cover 22. Even if the second oil drainage recovery device 20a1 is not provided, the lubricating oil discharged from the bearing oil drainage port 16a rarely mixes with the lubricating oil that cools the gears in the space surrounded by the internal gears 4. By providing the second oil drainage recovery device 20a1, it is possible to more reliably suppress the temperature rise of the lubricating oil in the space surrounded by the internal gear 4. As a result, not only the same effect as that of the first embodiment can be obtained, but also the gear can be cooled more effectively, and the seizure damage of the tooth surface can be avoided.

本発明の軸受排油口を備えた遊星歯車装置の実施例4としての遊星歯車装置5Eの構造を、図6(a)及び図6(b)を用いて説明する。 The structure of the planetary gear device 5E as the fourth embodiment of the planetary gear device provided with the bearing oil drain port of the present invention will be described with reference to FIGS. 6 (a) and 6 (b).

該図に示す本実施例の遊星歯車装置5Eは、実施例1で説明した遊星歯車装置5Bとほとんど同様な構成であるが、本実施例では、排油回収カバー18がスラスト軸受9bと一体構造となっている点が実施例1と異なる。 The planetary gear device 5E of the present embodiment shown in the figure has almost the same configuration as the planetary gear device 5B described in the first embodiment, but in the present embodiment, the oil drainage recovery cover 18 has an integral structure with the thrust bearing 9b. The point is different from the first embodiment.

本実施例の排油回収装置20cは、排油回収カバー18と一体構造のスラスト軸受9b、排油管19a、第1の排油孔19b、第2の排油孔19c、第3の排油孔19d、排油孔キャップ21、排油口17によって構成されており、排油回収カバー18と一体構造のスラスト軸受9b以外は、その構造、製造方法、組立て方法が実施例1と同様である。 The oil drainage recovery device 20c of this embodiment has a thrust bearing 9b, an oil drainage pipe 19a, a first oil drainage hole 19b, a second oil drainage hole 19c, and a third oil drainage hole having an integral structure with the oil drainage recovery cover 18. The structure, manufacturing method, and assembly method are the same as those in the first embodiment, except for the thrust bearing 9b, which is composed of 19d, an oil drain hole cap 21, and an oil drain port 17, and has an integral structure with the oil drain recovery cover 18.

本実施例の排油回収カバー18と一体構造のスラスト軸受9b1の構造を、以下で説明する。 The structure of the thrust bearing 9b1 integrally with the oil drainage recovery cover 18 of this embodiment will be described below.

図6(a)及び図6(b)に示すように、スラスト軸受9b1は環状構造となっており、排油回収機能を付与するため、その外周近くに円周に沿った溝(排油回収カバー18が一体に形成されたスラスト軸受9bの外周面と遊星歯車2側に延びる排油回収カバー18のL字部分とで形成される空間)を設けている。また、スラスト軸受9bのうち、排油回収機能を備える最外周部において、遊星歯車2と隣接している部分は、ラビリンスパッキン等のシール構造となっている。更に、スラスト軸受9bは、排油管19aと接続するための穴を備えている。 As shown in FIGS. 6A and 6B, the thrust bearing 9b1 has an annular structure, and in order to provide an oil drainage recovery function, a groove along the circumference (oil drainage recovery) is provided near the outer circumference thereof. A space formed by the outer peripheral surface of the thrust bearing 9b integrally formed with the cover 18 and the L-shaped portion of the oil drainage recovery cover 18 extending to the planetary gear 2 side) is provided. Further, in the outermost peripheral portion of the thrust bearing 9b having the oil drainage recovery function, the portion adjacent to the planetary gear 2 has a seal structure such as a labyrinth packing. Further, the thrust bearing 9b is provided with a hole for connecting to the oil drain pipe 19a.

上記した排油回収カバー18と一体構造のスラスト軸受9b1は、以下の手順で製造されることが望ましい。 It is desirable that the thrust bearing 9b1 having an integral structure with the oil drainage recovery cover 18 described above is manufactured by the following procedure.

即ち、排油回収カバー18と一体構造のスラスト軸受9bは、例えば炭素鋼や構造用合金鋼などで製作され、切削加工によって形成されている。また、排油管19aと接続するために、円筒面に穴あけ加工が施されている。 That is, the thrust bearing 9b having an integral structure with the oil drainage recovery cover 18 is made of, for example, carbon steel or structural alloy steel, and is formed by cutting. Further, a hole is drilled in the cylindrical surface in order to connect to the oil drain pipe 19a.

また、排油回収カバーと一体構造のスラスト軸受9bは、他の実施例におけるスラスト軸受と同様の組立て方法で組立てられている。 Further, the thrust bearing 9b having an integral structure with the oil drainage recovery cover is assembled by the same assembly method as the thrust bearing in the other embodiments.

このような本実施例の遊星歯車装置5Eとすることにより、以下のような効果が得られる。 By using the planetary gear device 5E of this embodiment as described above, the following effects can be obtained.

即ち、歯車の冷却効果については、実施例1の構造と同等であるが、排油回収カバー18をスラスト軸受9bと一体構造とすることで、排油回収カバー18の組立てにかかる手間を省くことができる。 That is, the cooling effect of the gear is the same as that of the first embodiment, but by integrating the oil drainage recovery cover 18 with the thrust bearing 9b, the labor required for assembling the oil drainage recovery cover 18 can be saved. Can be done.

本発明の軸受排油口を備えた遊星歯車装置の実施例5としての遊星歯車装置5Fの構造を、図7を用いて説明する。 The structure of the planetary gear device 5F as the fifth embodiment of the planetary gear device provided with the bearing oil drain port of the present invention will be described with reference to FIG. 7.

該図に示す本実施例の遊星歯車装置5Fは、排油回収カバー18aに実施例1のような排油管19a、第2の遊星キャリア3aに実施例1のような排油孔19dを設けず、遊星軸7に排油孔24を給油孔15b1と同様の経路上に設けている点が実施例1と異なる。 In the planetary gear device 5F of the present embodiment shown in the figure, the oil drainage recovery cover 18a is not provided with the oil drainage pipe 19a as in the first embodiment, and the second planetary carrier 3a is not provided with the oil drainage hole 19d as in the first embodiment. The planetary axis 7 is different from the first embodiment in that the oil drain hole 24 is provided on the same path as the oil supply hole 15b1.

即ち、本実施例では、排油排出機構が、遊星軸7に形成されている給油孔15b1と同様の経路上に設けられ、ジャーナル軸受8の軸受面からの潤滑油が排出される先端部が排油口25となっている排油孔24から成り、排油回収カバー18aと排油口25を有する排油孔24で排油回収装置20d1を構成するものであり、その他の構造、製造方法、組立て方法が実施例1と同様である。排油孔24には、効率よく排油を回収するために、ポンプを接続しても良い。 That is, in this embodiment, the oil drainage discharge mechanism is provided on the same path as the oil supply hole 15b1 formed in the planetary shaft 7, and the tip portion where the lubricating oil is discharged from the bearing surface of the journal bearing 8 is provided. The oil drainage recovery device 20d1 is composed of the oil drainage hole 24 which is the oil drainage port 25 and has the oil drainage recovery cover 18a and the oil drainage port 25. The assembly method is the same as that of the first embodiment. A pump may be connected to the oil drain hole 24 in order to efficiently collect the drainage.

また、本実施例での排油回収カバー18aはL字状を成し、このL字状の一方側がスラスト軸受8の側面に固定され、L字状の他方側がスラスト軸受9bの外周を覆うように構成されていると共に、排油回収カバー18aは、L字状の他方側の遊星歯車2と隣接している部分がラビリンスパッキン等のシール構造となっている。 Further, the oil drainage recovery cover 18a in this embodiment has an L-shape, one side of the L-shape is fixed to the side surface of the thrust bearing 8, and the other side of the L-shape covers the outer periphery of the thrust bearing 9b. The oil drainage recovery cover 18a has a seal structure such as a labyrinth packing at a portion adjacent to the planetary gear 2 on the other side of the L-shape.

このような本実施例の遊星歯車装置5Fとすることにより、以下のような効果が得られる。 By using the planetary gear device 5F of this embodiment as described above, the following effects can be obtained.

即ち、ジャーナル軸受8において、軸受損が発生して昇温した潤滑油は、一部が軸受排油口16a、16bから排出されるが、潤滑油が軸受排油口16bには行かず、ほとんど排油口17によって回収される。 That is, in the journal bearing 8, a part of the lubricating oil whose temperature has risen due to bearing loss is discharged from the bearing oil discharge ports 16a and 16b, but the lubricating oil does not go to the bearing oil discharge port 16b. Most of the oil is collected by the oil drain port 17.

しかし、軸受排油口16bから排出した潤滑油は、排油回収カバー18aによって回収されるため、内歯車4で囲まれた空間内へと排出されることはない。従って、歯車の冷却効果については、実施例1の構造と同等であると期待できる。また、実施例1のような排油管や排油孔などを設ける必要がないため、内歯車4で囲まれた空間内に設置する部品点数が減少し、メンテナンス性が向上する。 However, since the lubricating oil discharged from the bearing oil drain port 16b is recovered by the oil drain recovery cover 18a, it is not discharged into the space surrounded by the internal gear 4. Therefore, the cooling effect of the gear can be expected to be equivalent to the structure of the first embodiment. Further, since it is not necessary to provide an oil drain pipe or an oil drain hole as in the first embodiment, the number of parts to be installed in the space surrounded by the internal gear 4 is reduced, and maintainability is improved.

なお、上記した実施例は本発明を分かり易く説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成を置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 It should be noted that the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1…太陽歯車、2…遊星歯車、2a…遊星歯車ボス、3a…第1の遊星キャリア、3b…第2の遊星キャリア、3b1…遊星キャリアの円板状部材、3b2…遊星キャリアの柱部材、3b3…遊星キャリアのフランジ部、4…内歯車、5A、5B、5C、5D、5E、5F…遊星歯車装置、6…入力軸、7…遊星軸、8…ジャーナル軸受、9a、9b、9b1…スラスト軸受、10…出力軸支持装置、11…出力軸、12…オイルタンク、13…フィルタ、14…ポンプ、15a、15b…給油口、15b1…給油孔、16a、16b、16b1…軸受排油口、17、17a、25…排油口、18、18a…排油回収カバー、19a…排油管、19b…第1の排油孔、19c…第2の排油孔、19d…第3の排油孔、19e…第4の排油孔、20a、20b、20c、20a1、20d1…排油回収装置、21…排油孔キャップ、22…第2の排油回収カバー、24…排油孔。 1 ... sun gear, 2 ... planetary gear, 2a ... planetary gear boss, 3a ... first planetary carrier, 3b ... second planetary carrier, 3b1 ... planetary carrier disk-shaped member, 3b2 ... planetary carrier pillar member, 3b3 ... Planetary carrier flange, 4 ... Internal gear, 5A, 5B, 5C, 5D, 5E, 5F ... Planetary gear device, 6 ... Input shaft, 7 ... Planetary shaft, 8 ... Journal bearing, 9a, 9b, 9b1 ... Thrust bearing, 10 ... Output shaft support device, 11 ... Output shaft, 12 ... Oil tank, 13 ... Filter, 14 ... Pump, 15a, 15b ... Refueling port, 15b1 ... Refueling hole, 16a, 16b, 16b1 ... Bearing oil drain port , 17, 17a, 25 ... Oil drain port, 18, 18a ... Oil recovery cover, 19a ... Oil drain pipe, 19b ... First oil drain hole, 19c ... Second oil drain hole, 19d ... Third oil drain Holes, 19e ... Fourth oil drain holes, 20a, 20b, 20c, 20a1, 20d1 ... Oil drainage recovery device, 21 ... Oil drainage hole caps, 22 ... Second oil drainage recovery cover, 24 ... Oil drainage holes.

Claims (17)

外歯を有する太陽歯車と、該太陽歯車の外歯と噛合う複数の遊星歯車と、該遊星歯車と内歯を介して噛合う内歯車と、前記遊星歯車を支持している遊星軸と、前記遊星歯車を挟んで前記遊星軸を支持する第1及び第2の遊星キャリアと、前記太陽歯車を回転駆動する入力軸と、前記内歯車と嵌合して回転駆動される出力軸と、前記遊星歯車の径方向荷重を支持するジャーナル軸受と、前記遊星歯車の軸方向両端に設置され、前記遊星歯車の軸方向荷重を支持するスラスト軸受とを備え、前記遊星歯車と前記スラスト軸受の間に軸受排油口が形成され、前記遊星軸に形成されている給油孔を介して前記ジャーナル軸受に供給された潤滑油が、前記ジャーナル軸受の軸方向両端に流れて前記スラスト軸受に供給され前記軸受排油口から排出される軸受排油口を備えた遊星歯車装置において、
前記遊星歯車装置は、少なくとも前記内歯車で囲まれた空間側の前記スラスト軸受を覆うように設置され、前記軸受排油口から排出される前記潤滑油を回収する排油回収カバーと、該排油回収カバーで回収された前記潤滑油を装置の外部に排出する排油排出機構とから成る排油回収装置を備えていることを特徴とする軸受排油口を備えた遊星歯車装置。
A sun gear having external teeth, a plurality of planetary gears that mesh with the external teeth of the sun gear, an internal gear that meshes with the planetary gear via the internal teeth, and a planetary shaft that supports the planetary gear. The first and second planetary carriers that support the planetary shaft with the planetary gear sandwiched between them, an input shaft that rotationally drives the sun gear, an output shaft that is fitted with the internal gear and driven to rotate, and the above. A journal bearing that supports the radial load of the planetary gear and a thrust bearing that is installed at both ends of the planetary gear in the axial direction and supports the axial load of the planetary gear are provided between the planetary gear and the thrust bearing. Lubricating oil supplied to the journal bearing through an oil supply hole formed in the planetary shaft with a bearing oil drain port formed flows to both ends in the axial direction of the journal bearing and is supplied to the thrust bearing. In a planetary gear device equipped with a bearing oil drain port that is discharged from the oil drain port,
The planetary gear device is installed so as to cover at least the thrust bearing on the space side surrounded by the internal gear, and has a drainage recovery cover for recovering the lubricating oil discharged from the bearing oil drainage port and the drainage. A planetary gear device including a bearing oil drain port, which comprises an oil drainage recovery device including an oil drainage discharge mechanism for discharging the lubricating oil recovered by the oil recovery cover to the outside of the device.
請求項1に記載の軸受排油口を備えた遊星歯車装置において、
前記排油排出機構は、前記排油回収カバーに一端が接続された排油管と、前記第2の遊星キャリアに形成され、前記排油管の他端に一端が接続された排油孔と、前記第1の遊星キャリアに形成され、前記排油孔の他端に一端が接続された排油孔とから成ることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 1,
The oil drainage mechanism includes an oil drainage pipe having one end connected to the oil drainage recovery cover, an oil drainage hole formed in the second planetary carrier and one end connected to the other end of the oil drainage pipe, and the above. A planetary gear device provided with a bearing oil drain port formed on a first planetary carrier and comprising an oil drain hole having one end connected to the other end of the oil drain hole.
請求項2に記載の軸受排油口を備えた遊星歯車装置において、
前記第2の遊星キャリアは、前記遊星軸を支持する円板状部材と、該円板状部材と一体に形成され、前記円板状部材から軸方向に伸延し、その先端部にフランジ部を有し、該フランジ部を介して円板状の前記第1の遊星キャリアが接続される柱部材とから構成され、
前記第2の遊星キャリアの円板状部材に第1の排油孔が、前記第2の遊星キャリアの柱部材に第2の排油孔が、前記第1の遊星キャリアに第3の排油孔がそれぞれ形成され、
前記第1の排油孔の一端が前記排油管に、前記第1の排油孔の他端が前記第2の排油孔の一端に、前記第2の排油孔の他端が前記第3の排油孔の一端にそれぞれ接続されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 2.
The second planetary carrier is formed integrally with the disk-shaped member that supports the planetary axis and the disk-shaped member, extends axially from the disk-shaped member, and has a flange portion at the tip thereof. It is composed of a pillar member having and to which the first planetary carrier having a disk shape is connected via the flange portion.
The disk-shaped member of the second planet carrier has a first oil drain hole, the pillar member of the second planet carrier has a second oil drain hole, and the first planet carrier has a third oil drain hole. Each hole is formed,
One end of the first oil drain hole is the oil drain pipe, the other end of the first oil drain hole is one end of the second oil drain hole, and the other end of the second oil drain hole is the first. A planetary gear device provided with a bearing oil drain port, each of which is connected to one end of each of the oil drain holes of 3.
請求項3に記載の軸受排油口を備えた遊星歯車装置において、
前記第1の排油孔は、前記排油管と接続される側とは反対側の端部に、該端部を封止する排油孔キャップが設置されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 3.
The first oil drain hole is characterized in that a bearing oil drain cap is provided at an end opposite to the side connected to the oil drain pipe to seal the end. Planetary gear device with mouth.
請求項2に記載の軸受排油口を備えた遊星歯車装置において、
前記第2の遊星キャリアは、前記遊星軸を支持する円板状部材と、該円板状部材と一体に形成され、前記円板状部材から軸方向に伸延し、その先端部にフランジ部を有し、該フランジ部を介して円板状の前記第1の遊星キャリアが接続される柱部材とから構成され、
前記第2の遊星キャリアの柱部材に第2の排油孔が、前記第1の遊星キャリアに第3の排油孔がそれぞれ形成され、
前記第2の排油孔の一端が前記排油管に、前記第2の排油孔の他端が前記第3の排油孔の一端にそれぞれ接続されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 2.
The second planetary carrier is formed integrally with the disk-shaped member that supports the planetary axis and the disk-shaped member, extends axially from the disk-shaped member, and has a flange portion at the tip thereof. It is composed of a pillar member having and to which the first planetary carrier having a disk shape is connected via the flange portion.
A second oil drain hole is formed in the pillar member of the second planet carrier, and a third oil drain hole is formed in the first planet carrier.
A bearing oil drain port characterized in that one end of the second oil drain hole is connected to the oil drain pipe and the other end of the second oil drain hole is connected to one end of the third oil drain hole. Planetary gear device equipped with.
請求項3乃至5のいずれか1項に記載の軸受排油口を備えた遊星歯車装置において、
前記第3の排油孔の他端は、前記潤滑油を装置の外部に排出する排油口となっていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to any one of claims 3 to 5.
A planetary gear device including a bearing oil drain port, wherein the other end of the third oil drain hole is an oil drain port for discharging the lubricating oil to the outside of the device.
請求項1乃至6のいずれか1項に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーはL字状を成し、このL字状の一方側が前記スラスト軸受の側面に固定され、前記L字状の他方側が前記スラスト軸受の外周を覆うように構成されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to any one of claims 1 to 6.
The oil drainage recovery cover has an L-shape, one side of the L-shape is fixed to the side surface of the thrust bearing, and the other side of the L-shape covers the outer periphery of the thrust bearing. A planetary gear device equipped with a bearing oil drain port.
請求項7に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーは、前記L字状の他方側の前記遊星歯車と隣接している部分がシール構造となっていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 7.
The oil drainage recovery cover is a planetary gear device provided with a bearing oil drainage port, characterized in that a portion adjacent to the planetary gear on the other side of the L-shape has a seal structure.
請求項8に記載の軸受排油口を備えた遊星歯車装置において、
前記遊星歯車は、前記ジャーナル軸受側が前記出力軸側に突出する遊星歯車ボスを備えていると共に、前記軸受排油口は、前記遊星歯車ボスと前記スラスト軸受の間に形成され、この軸受排油口の位置と、前記排油回収カバーと前記遊星歯車のシール構造部分の位置が軸方向にずれていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 8.
The planetary gear includes a planetary gear boss whose journal bearing side projects toward the output shaft side, and the bearing oil drain port is formed between the planetary gear boss and the thrust bearing to drain oil from the bearing. A planetary gear device including a bearing oil drain port, characterized in that the position of the port and the position of the oil drain recovery cover and the seal structure portion of the planet gear are displaced in the axial direction.
請求項8に記載の軸受排油口を備えた遊星歯車装置において、
前記第1の遊星キャリアに、前記排油回収カバーで外周が覆われた前記スラスト軸受とは反対側に配置されたスラスト軸受を覆うように第2の排油回収カバーが設置され、前記第2の排油回収カバーと前記排油回収カバーで外周が覆われた前記スラスト軸受とは反対側に配置されたスラスト軸受との間に空間が形成され、この空間と連通する第4の排油孔が前記第1の遊星キャリアに形成されていることを特徴とする軸受排油口を備えた遊星歯
車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 8.
A second oil drainage recovery cover is installed on the first planetary carrier so as to cover a thrust bearing arranged on the side opposite to the thrust bearing whose outer periphery is covered with the oil drainage recovery cover. A fourth oil drain hole is formed between the oil drainage recovery cover and the thrust bearing arranged on the opposite side of the thrust bearing whose outer periphery is covered with the oil drainage recovery cover, and communicates with this space. A planetary gear device provided with a bearing oil drain port, characterized in that is formed on the first planetary carrier.
請求項10に記載の軸受排油口を備えた遊星歯車装置において、
前記第2の排油回収カバーはL字状を成し、このL字状の一方側が前記第1の遊星キャリアに固定され、L字状の他方側が前記排油回収カバーで外周が覆われた前記スラスト軸受とは反対側に配置された前記スラスト軸受の外周を覆うと共に、その先端が前記遊星歯車と隣接している部分がシール構造となっていることを特徴とする軸受排油口を備えた遊
星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 10.
The second oil drainage recovery cover has an L-shape, one side of the L-shape is fixed to the first planetary carrier, and the other side of the L-shape is covered with the oil drainage recovery cover. It is provided with a bearing oil drain port which covers the outer periphery of the thrust bearing arranged on the opposite side of the thrust bearing and has a seal structure at a portion where the tip thereof is adjacent to the planetary gear. Planetary gear device.
請求項11に記載の軸受排油口を備えた遊星歯車装置において、
前記第4の排油孔の前記空間と連通する側とは反対側は、前記潤滑油を装置の外部に排出する排油口となっていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 11.
A planet having a bearing oil drain port on the side of the fourth oil drain hole opposite to the side communicating with the space is an oil drain port for discharging the lubricating oil to the outside of the device. Gear device.
請求項8に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーと前記スラスト軸受は、一体構造となっていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 8.
A planetary gear device including a bearing oil drain port, wherein the oil drainage recovery cover and the thrust bearing have an integral structure.
請求項13に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーが一体構造となっている前記スラスト軸受は、該スラスト軸受の外周面と前記遊星歯車側に延びる前記排油回収カバーのL字状部分とで空間が形成されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 13.
In the thrust bearing having the integrated structure of the oil drainage recovery cover, a space is formed between the outer peripheral surface of the thrust bearing and the L-shaped portion of the oil drainage recovery cover extending to the planetary gear side. A planetary gear device equipped with a characteristic bearing oil drain port.
外歯を有する太陽歯車と、該太陽歯車の外歯と噛合う複数の遊星歯車と、該遊星歯車と内歯を介して噛合う内歯車と、前記遊星歯車を支持している遊星軸と、前記遊星歯車を挟んで前記遊星軸を支持する第1及び第2の遊星キャリアと、前記太陽歯車を回転駆動する入力軸と、前記内歯車と嵌合して回転駆動される出力軸と、前記遊星歯車の径方向荷重を支持するジャーナル軸受と、前記遊星歯車の軸方向両端に設置され、前記遊星歯車の軸方向荷重を支持するスラスト軸受とを備え、前記遊星歯車と前記スラスト軸受の間に軸受排油口が形成され、前記遊星軸に形成されている給油孔を介して前記ジャーナル軸受に供給された潤滑油が、前記ジャーナル軸受の軸方向両端に流れて前記スラスト軸受に供給され前記軸受排油口から排出される軸受排油口を備えた遊星歯車装置において、
前記遊星歯車装置は、少なくとも前記内歯車で囲まれた空間側の前記スラスト軸受を覆うように設置された排油回収カバーと、前記潤滑油を装置の外部に排出する排油排出機構とから成る排油回収装置を備え、
前記排油排出機構は、前記遊星軸に形成されている前記給油孔と同様の経路上に設けられ、前記ジャーナル軸受の軸受面からの前記潤滑油が排出される排油孔から成ることを特徴とする軸受排油口を備えた遊星歯車装置。
A sun gear having external teeth, a plurality of planetary gears that mesh with the external teeth of the sun gear, an internal gear that meshes with the planetary gear via the internal teeth, and a planetary shaft that supports the planetary gear. The first and second planetary carriers that support the planetary shaft with the planetary gear sandwiched between them, an input shaft that rotationally drives the sun gear, an output shaft that is fitted with the internal gear and driven to rotate, and the above. A journal bearing that supports the radial load of the planetary gear and a thrust bearing that is installed at both ends of the planetary gear in the axial direction and supports the axial load of the planetary gear are provided between the planetary gear and the thrust bearing. Lubricating oil supplied to the journal bearing through an oil supply hole formed in the planetary shaft with a bearing oil drain port formed flows to both ends in the axial direction of the journal bearing and is supplied to the thrust bearing. In a planetary gear device equipped with a bearing oil drain port that is discharged from the oil drain port,
The planetary gear device includes at least an oil drainage recovery cover installed so as to cover the thrust bearing on the space side surrounded by the internal gear, and an oil drainage discharge mechanism for discharging the lubricating oil to the outside of the device. Equipped with a drainage recovery device
The oil drainage mechanism is provided on a path similar to the oil supply hole formed on the planetary shaft, and is characterized by including an oil drainage hole from which the lubricating oil is discharged from the bearing surface of the journal bearing. A planetary gear device equipped with a bearing oil drain port.
請求項15に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーはL字状を成し、このL字状の一方側が前記スラスト軸受の側面に固定され、前記L字状の他方側が前記スラスト軸受の外周を覆うように構成されていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 15.
The oil drainage recovery cover has an L-shape, one side of the L-shape is fixed to the side surface of the thrust bearing, and the other side of the L-shape covers the outer periphery of the thrust bearing. A planetary gear device equipped with a bearing oil drain port.
請求項16に記載の軸受排油口を備えた遊星歯車装置において、
前記排油回収カバーは、前記L字状の他方側の前記遊星歯車と隣接している部分がシール構造となっていることを特徴とする軸受排油口を備えた遊星歯車装置。
In the planetary gear device provided with the bearing oil drain port according to claim 16.
The oil drainage recovery cover is a planetary gear device provided with a bearing oil drainage port, characterized in that a portion adjacent to the planetary gear on the other side of the L-shape has a seal structure.
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