JP2021080994A

JP2021080994A - Gear device for railway vehicle

Info

Publication number: JP2021080994A
Application number: JP2019208446A
Authority: JP
Inventors: 史人神長; Fumito Kaminaga
Original assignee: Toyo Electric Manufacturing Ltd
Current assignee: Toyo Electric Manufacturing Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2021-05-27

Abstract

To prevent a large amount of lubricating oil from flowing down to an arrangement part of a bearing 7 for an axle of an axial direction one side by a motion component to the axial direction one side to be applied to lubricating oil scraped up by a large gear 5 in a gear device for a railway vehicle which stores a small gear fixed to an input axis and the large gear 5 fixed to an axle 4 in a mutually and horizontally engaged state in a gear box 1, has the bearing for input axis and the bearing 7 for an axle attached to a side wall part 11 on axial both sides of the gear box 1, and provided with a box lid 8 including a flange part 81 covering an opening formed on a top surface of the gear box 1, a rising part 82 of axial both sides rising from the flange part 81 and a ceiling part 83 covering the top edge of both rising parts 82.SOLUTION: A ceiling part 83 of a box lid 8 has a groove part 831 recessed upward, extending in a circumferential direction of a large gear 5.SELECTED DRAWING: Figure 2

Description

本発明は、歯車箱を備え、歯車箱内に、駆動源により回転駆動される入力軸に固定される小歯車と車軸に固定される大歯車とが互いに水平方向に噛み合わせた状態で収納され、歯車箱の軸方向両側の側壁部に、入力軸用の軸受と車軸用の軸受とが取付けられた鉄道車両用歯車装置に関する。 The present invention includes a gear box, and the small gear fixed to the input shaft driven by the drive source and the large gear fixed to the axle are housed in the gear box in a state of being horizontally meshed with each other. The present invention relates to a gear device for a railroad vehicle in which a bearing for an input shaft and a bearing for an axle are attached to side wall portions on both sides in the axial direction of the gear box.

従来、この種の鉄道車両用歯車装置として、歯車箱に、大歯車を上方から挿入可能な上面の開口を形成し、この開口を覆う箱蓋を歯車箱の上面に取付けたものが知られている（例えば、特許文献１参照）。このもので、箱蓋は、歯車箱の上面の開口周縁部に着座するフランジ部と、フランジ部から立ち上がる軸方向両側の立上り部と、両立上り部の上端に跨る天井部とを有している。また、鉄道車両用歯車装置では、歯車箱内の下部に溜められた潤滑油を大歯車で掻き揚げて、小歯車と大歯車との噛合い箇所を含む各潤滑箇所に潤滑油が供給されるようにしている。 Conventionally, as a gear device for a railroad vehicle of this type, a gear box has an opening on the upper surface into which a large gear can be inserted from above, and a box lid covering the opening is attached to the upper surface of the gear box. (See, for example, Patent Document 1). In this case, the box lid has a flange portion seated on the opening peripheral edge portion on the upper surface of the gear box, rising portions on both sides in the axial direction rising from the flange portion, and a ceiling portion straddling the upper end of the compatible rising portion. .. Further, in the gear device for railway vehicles, the lubricating oil stored in the lower part of the gear box is scooped up by the large gear, and the lubricating oil is supplied to each lubrication point including the meshing point between the small gear and the large gear. I am trying to do it.

ところで、はすば歯車で構成される大歯車の歯すじのねじれに起因して、大歯車で掻き揚げられた潤滑油に軸方向一方への運動成分が付与される。そのため、箱蓋の天井部から軸方向一方の立上り部に向けて潤滑油が偏流し、多量の潤滑油が歯車箱の軸方向一方の側壁部を伝って軸方向一方の車軸用軸受の配置部に流下する。また、大歯車の回転速度が所定速度以上になると、理由は定かではないが、大歯車で掻き揚げられた潤滑油が箱蓋の天井部から軸方向他方の立上り部に向けて偏流し、多量の潤滑油が歯車箱の軸方向他方の側壁部を伝って軸方向他方の車軸用軸受の配置部に流下する。 By the way, due to the twisting of the tooth streaks of the large gear composed of the helical gear, the lubricating oil scooped up by the large gear is provided with a kinetic component in one axial direction. Therefore, the lubricating oil flows unevenly from the ceiling of the box lid toward the rising portion in one axial direction, and a large amount of lubricating oil travels along the side wall portion in one axial direction of the gearbox to arrange the bearing for one axle in the axial direction. Flow down to. Further, when the rotation speed of the large gear exceeds a predetermined speed, the reason is not clear, but the lubricating oil scooped up by the large gear flows unevenly from the ceiling of the box lid toward the other rising portion in the axial direction, resulting in a large amount. Lubricating oil flows down the other side wall portion in the axial direction of the gearbox to the arrangement portion of the other axle bearing in the axial direction.

ここで、車軸用軸受の軸方向外側には、軸受に供給された潤滑油が外部に洩れ出ないようにラビリンスシールが設けられているが、軸受の配置部に上記の如く多量の潤滑油が流下すると、ラビリンスシールだけでは潤滑油の洩れを防止できなくなる。そこで、従来は、車軸用軸受の軸方向外側にラビリンスシールに加えてゴム製のオイルシールを設けている。然し、オイルシールは、消耗品であって、その交換が必要になり、メンテナンスが面倒になる。 Here, a labyrinth seal is provided on the outer side of the axle bearing in the axial direction so that the lubricating oil supplied to the bearing does not leak to the outside, but a large amount of lubricating oil is applied to the bearing arrangement portion as described above. If it flows down, the labyrinth seal alone cannot prevent the leakage of lubricating oil. Therefore, conventionally, in addition to the labyrinth seal, a rubber oil seal is provided on the outer side of the axle bearing in the axial direction. However, the oil seal is a consumable item and needs to be replaced, which makes maintenance troublesome.

実開昭６４−４６５７２号公報Jitsukaisho 64-46572

本発明は、以上の点に鑑み、車軸用軸受の配置部への多量の潤滑油の流下を抑制して、車軸用軸受に供給された潤滑油の外部への洩れをオイルシールを設けずに、或いは、オイルシールの交換頻度を低くしても防止できるようにした鉄道車両用歯車装置を提供することをその課題としている。 In view of the above points, the present invention suppresses the flow of a large amount of lubricating oil to the arrangement portion of the axle bearing, and prevents the lubricating oil supplied to the axle bearing from leaking to the outside without providing an oil seal. Alternatively, it is an object of the present invention to provide a gear device for a railroad vehicle which can be prevented even if the replacement frequency of the oil seal is reduced.

上記課題を解決するために、本発明は、歯車箱を備え、歯車箱内に、駆動源により回転駆動される入力軸に固定される小歯車と車軸に固定される大歯車とが互いに水平方向に噛み合わせた状態で収納され、歯車箱の軸方向両側の側壁部に、入力軸用の軸受と車軸用の軸受とが取付けられた鉄道車両用歯車装置であって、歯車箱は、大歯車を上方から挿入可能な上面の開口を有し、この開口を覆う箱蓋が歯車箱の上面に取付けられ、箱蓋は、歯車箱の上面の開口周縁部に着座するフランジ部と、フランジ部から立ち上がる軸方向両側の立上り部と、両立上り部の上端に跨る天井部とを有するものにおいて、箱蓋の天井部は、大歯車の周方向に延在する、上方に凹入した溝部を有することを特徴とする。 In order to solve the above problems, the present invention includes a gear box, in which the small gear fixed to the input shaft rotationally driven by the drive source and the large gear fixed to the axle are in the horizontal direction with each other. It is a gear device for railway vehicles in which a bearing for an input shaft and a bearing for an axle are attached to the side wall portions on both sides in the axial direction of the gear box, and the gear box is a large gear. Has an opening on the upper surface that can be inserted from above, and a box lid that covers this opening is attached to the upper surface of the gear box. In those having rising portions on both sides in the axial direction to rise and a ceiling portion straddling the upper end of the compatible rising portion, the ceiling portion of the box lid shall have an upwardly recessed groove portion extending in the circumferential direction of the large gear. It is characterized by.

本発明によれば、大歯車で掻き揚げられた潤滑油が箱蓋の天井部の溝部を伝って大歯車の周方向に導かれ易くなる。そのため、掻き揚げられた潤滑油に軸方向片側への運動成分が付与されても、箱蓋の天井部から軸方向片側の立上り部に向けて潤滑油が偏流し難くなり、軸方向片側の車軸用軸受の配置部に多量の潤滑油が流下することを抑制できる。従って、車軸用軸受に供給された潤滑油の外部への洩れをオイルシールを設けずに、或いは、オイルシールの交換頻度を低くしても防止でき、メンテナンス性が向上する。 According to the present invention, the lubricating oil scooped up by the large gear is easily guided in the circumferential direction of the large gear along the groove in the ceiling of the box lid. Therefore, even if a moving component in one axial direction is applied to the pumped lubricating oil, it becomes difficult for the lubricating oil to flow unevenly from the ceiling of the box lid to the rising portion on one axial side, and the axle on one side in the axial direction. It is possible to prevent a large amount of lubricating oil from flowing down to the portion where the bearing is arranged. Therefore, leakage of the lubricating oil supplied to the axle bearing to the outside can be prevented without providing the oil seal or even if the replacement frequency of the oil seal is reduced, and the maintainability is improved.

本発明の実施形態の鉄道車両用歯車装置の切断側面図。The cut side view of the gear device for a railroad vehicle of an embodiment of this invention. 図１のＩＩ−ＩＩ線で切断した断面図。FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 図１のＩＩＩ−ＩＩＩで切断した断面図。Sectional drawing taken along the line III-III of FIG.

図１を参照して、本発明の実施形態の鉄道車両用歯車装置は、歯車箱１を備えている。歯車箱１内には、図示省略した駆動源により回転駆動される入力軸２（図３参照）に固定されるはすば歯車から成る小歯車３と車軸４に固定されるはすば歯車から成る大歯車５とが互いに水平方向に噛み合わせた状態で収納されている。図２、図３を参照して、歯車箱１の軸方向両側の側壁部１１，１１には、入力軸２を軸支する一対の入力軸用軸受６，６と車軸４を軸支する一対の車軸用軸受７，７とが取付けられている。具体的には、各側壁部１１に、入力軸２と同心で小歯車３より大径の開口１１１と、車軸４と同心で大歯車５より小径の開口１１２とを形成している。そして、入力軸用軸受６を内蔵する軸受箱６１を各側壁部１１に開口１１１を閉塞するようにして取付け、また、車軸用軸受７を内蔵する軸受箱７１を各側壁部１１に開口１１２を閉塞するようにして取付けている。小歯車３は、入力軸２に一体に形成され、軸方向一方の側壁部１１の開口１１１を通して歯車箱１内に挿入される。尚、入力軸２に、これとは別体の小歯車３を外嵌固定することも可能である。 With reference to FIG. 1, the rail vehicle gear device according to the embodiment of the present invention includes a gear box 1. Inside the gearbox 1, there are a small gear 3 made of helical gears fixed to an input shaft 2 (see FIG. 3) that is rotationally driven by a drive source (not shown) and a helical gear fixed to an axle 4. The large gears 5 are housed in a state of being meshed with each other in the horizontal direction. With reference to FIGS. 2 and 3, a pair of input shaft bearings 6 and 6 for axially supporting the input shaft 2 and a pair for axially supporting the axle 4 are provided on the side wall portions 11 and 11 on both sides of the gear box 1 in the axial direction. Axle bearings 7 and 7 are attached. Specifically, each side wall portion 11 is formed with an opening 111 that is concentric with the input shaft 2 and has a diameter larger than that of the small gear 3, and an opening 112 that is concentric with the axle 4 and has a diameter smaller than that of the large gear 5. Then, the bearing box 61 containing the bearing 6 for the input shaft is attached to each side wall portion 11 so as to close the opening 111, and the bearing box 71 containing the bearing 7 for the axle is provided with the opening 112 in each side wall portion 11. It is installed so that it is closed. The small gear 3 is integrally formed with the input shaft 2 and is inserted into the gear box 1 through the opening 111 of the side wall portion 11 on one side in the axial direction. It is also possible to externally fix the small gear 3 which is different from the input shaft 2 to the input shaft 2.

歯車箱１内の下部には、大歯車５の下部が浸漬される第１油溜り部１２_１と、小歯車３の下方に位置する第２油溜り部１２_２と、第１油溜り部１２_１と第２油溜り部１２_２とを仕切る仕切壁１３とが設けられている。仕切壁１３には、第１油溜り部１２_１と第２油溜り部１２_２とを連通する連通孔１３１が形成されている。第１油溜り部１２_１に貯留された潤滑油は、大歯車５の回転で掻き揚げられ、小歯車３と大歯車５との噛合い箇所や入力軸用と車軸用の軸受６，７といった各潤滑箇所に掻き揚げられた潤滑油が供給される。尚、第１油溜り部１２_１の底面となる歯車箱１の部分には開口が形成されており、この開口に栓体１４が装着されている。栓体１４には、ドレンボルト１４１が装着されており、ドレンボルト１４１を抜くことで、歯車箱１内の潤滑油を外部に排出することができるようにしている。 The lower part of the gearbox 1, first the oil reservoir 12 ₁ lower portion of the gear wheel 5 is dipped, the second oil sump 12 ₂ located below the small gear 3, the first oil sump 12 ₁ and the second oil sump 12 ₂ and the partition wall 13 for partitioning the is provided. The partition wall 13, a communication hole 131 for communicating the first oil sump 12 ₁ and the second oil sump 12 ₂ is formed. The lubricating oil stored in the first oil sump portion 12 ₁ is scooped up by the rotation of the large gear 5, such as the meshing point between the small gear 3 and the large gear 5 and the bearings 6 and 7 for the input shaft and the axle. The pumped lubricating oil is supplied to each lubrication point. Incidentally, the portion of the gear box 1 as the first oil sump 12 ₁ of the bottom surface has an opening is formed, the opening plug 14 is mounted. A drain bolt 141 is attached to the plug body 14, and by removing the drain bolt 141, the lubricating oil in the gear box 1 can be discharged to the outside.

また、歯車箱１は、大歯車５を上方から挿入可能な上面の開口１５を有している。そして、この開口１５を覆う箱蓋８が歯車箱１の上面に取付けられている。箱蓋８は、歯車箱１の上面の開口周縁部１５１に着座するフランジ部８１と、フランジ部８１から立ち上がる軸方向両側の立上り部８２，８２と、両立上り部８２，８２の上端に跨る天井部８３とを有している。 Further, the gear box 1 has an opening 15 on the upper surface into which the large gear 5 can be inserted from above. A box lid 8 that covers the opening 15 is attached to the upper surface of the gear box 1. The box lid 8 has a flange portion 81 seated on the opening peripheral edge portion 151 on the upper surface of the gear box 1, rising portions 82 and 82 on both sides in the axial direction rising from the flange portion 81, and a ceiling straddling the upper ends of the compatible rising portions 82 and 82. It has a part 83.

ところで、背景技術の欄で先に説明したように、大歯車５で掻き揚げられた潤滑油は、これに付与される軸方向片側への運動成分により、箱蓋８の天井部８３から軸方向片側の立上り部８２に向けて偏流し、多量の潤滑油が歯車箱１の軸方向片側の側壁部１１を伝って軸方向片側の車軸用軸受７の配置部に流下する恐れがある。ここで、車軸用軸受７を内蔵する軸受箱７１の軸方向外端にはカバー７２が取付けられている。そして、軸受箱７１内とカバー７２内とに、複数のラビリンスシール部７３を設けて、車軸用軸受７に供給された潤滑油が外部に洩れ出ることを防止している。然し、多量の潤滑油が車軸用軸受７の配置部に流下すると、車軸用軸受７への潤滑油の供給量が過多となって、ラビリンスシール部７３だけでは潤滑油の外部への洩れを防止できなくなり、ゴム製のオイルシールを設けることが必要になる。 By the way, as described earlier in the column of background technology, the lubricating oil scooped up by the large gear 5 is axially oriented from the ceiling portion 83 of the box lid 8 due to the kinetic component applied to the large gear 5 in the axial direction. There is a possibility that a large amount of lubricating oil will flow toward the rising portion 82 on one side and flow down along the side wall portion 11 on one side in the axial direction of the gear box 1 to the arrangement portion of the axle bearing 7 on one side in the axial direction. Here, a cover 72 is attached to the axially outer end of the bearing box 71 containing the axle bearing 7. A plurality of labyrinth seal portions 73 are provided in the bearing box 71 and in the cover 72 to prevent the lubricating oil supplied to the axle bearing 7 from leaking to the outside. However, if a large amount of lubricating oil flows down to the arrangement portion of the axle bearing 7, the amount of lubricating oil supplied to the axle bearing 7 becomes excessive, and the labyrinth seal portion 73 alone prevents the lubricating oil from leaking to the outside. It will not be possible and it will be necessary to provide a rubber oil seal.

そこで、本実施形態では、箱蓋８の天井部８３を、大歯車５の周方向に延在する、上方に凹入した溝部８３１を有するものとしている。具体的には、天井部８３の軸方向各側の半部を軸方向各側の立上り部８２の上端から斜め上方にのびる傾斜部８３２で構成して、天井部８３を逆Ｖ字状の溝部８３１を有するものに形成している。 Therefore, in the present embodiment, the ceiling portion 83 of the box lid 8 is provided with an upwardly recessed groove portion 831 extending in the circumferential direction of the large gear 5. Specifically, half of the ceiling portion 83 on each side in the axial direction is composed of an inclined portion 832 extending diagonally upward from the upper end of the rising portion 82 on each side in the axial direction, and the ceiling portion 83 is formed by an inverted V-shaped groove portion. It is formed to have 831.

これによれば、大歯車５で掻き揚げられた潤滑油が箱蓋８の天井部８３の溝部８３１を伝って大歯車５の周方向に導かれ易くなる。そのため、掻き揚げられた潤滑油に軸方向片側への運動成分が付与されても、箱蓋８の天井部８３から軸方向片側の立上り部８２に向けて潤滑油が偏流し難くなり、軸方向片側の車軸用軸受７の配置部に多量の潤滑油が流下することを抑制できる。従って、車軸用軸受７に供給された潤滑油の外部への洩れをオイルシールを設けずに防止できる。その結果、オイルシールの交換が不要となり、メンテナンス性を向上できる。また、車軸用軸受７の外側にオイルシールを設ける場合でも、オイルシールが相当劣化しても潤滑油の外部への洩れを生じないため、オイルシールの交換頻度を低くすることができ、メンテナンス性が向上する。 According to this, the lubricating oil scooped up by the large gear 5 is easily guided in the circumferential direction of the large gear 5 through the groove 831 of the ceiling portion 83 of the box lid 8. Therefore, even if a moving component in one axial direction is applied to the scraped lubricating oil, the lubricating oil is less likely to flow unevenly from the ceiling portion 83 of the box lid 8 toward the rising portion 82 on one side in the axial direction, and the lubricating oil is less likely to flow in the axial direction. It is possible to prevent a large amount of lubricating oil from flowing down to the arrangement portion of the axle bearing 7 on one side. Therefore, leakage of the lubricating oil supplied to the axle bearing 7 to the outside can be prevented without providing an oil seal. As a result, it is not necessary to replace the oil seal, and maintainability can be improved. Further, even when the oil seal is provided on the outside of the axle bearing 7, the lubricating oil does not leak to the outside even if the oil seal deteriorates considerably, so that the frequency of oil seal replacement can be reduced and maintainability is maintained. Is improved.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、箱蓋８の天井部８３を逆Ｖ字状の溝部８３１を有するものとしているが、溝部８３１の形状は、逆Ｖ字状以外の例えばアーチ状であってもよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the ceiling portion 83 of the box lid 8 has an inverted V-shaped groove portion 831, but the shape of the groove portion 831 may be, for example, an arch shape other than the inverted V shape.

１…歯車箱、１１…側壁部、１５…上面の開口、１５１…開口周縁部、２…入力軸、３…小歯車、４…車軸、５…大歯車、６…入力軸用軸受、７…車軸用軸受、８…箱蓋、８１…フランジ部、８２…立上り部、８３…天井部、８３１…溝部。 1 ... Gear box, 11 ... Side wall, 15 ... Upper surface opening, 151 ... Opening periphery, 2 ... Input shaft, 3 ... Small gear, 4 ... Axle, 5 ... Large gear, 6 ... Input shaft bearing, 7 ... Axle bearings, 8 ... box lids, 81 ... flanges, 82 ... rising parts, 83 ... ceiling parts, 831 ... grooves.

Claims

A gearbox is provided, and the small gear fixed to the input shaft driven by the drive source and the large gear fixed to the axle are housed in the gearbox in a horizontally meshed state. A gear device for railway vehicles in which bearings for input shafts and bearings for axles are attached to the side walls on both sides in the axial direction.
The gearbox has an opening on the upper surface into which large gears can be inserted from above, and a box lid covering this opening is attached to the upper surface of the gearbox, and the box lid is a flange seated on the peripheral edge of the opening on the upper surface of the gearbox. In those having a portion, rising portions on both sides in the axial direction rising from the flange portion, and a ceiling portion straddling the upper end of the compatible rising portion.
A gear device for railway vehicles, wherein the ceiling portion of the box lid has a groove portion recessed upward, which extends in the circumferential direction of the large gear.