JPWO2015198544A1 - Disassembling method of gear device - Google Patents

Disassembling method of gear device Download PDF

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JPWO2015198544A1
JPWO2015198544A1 JP2016529014A JP2016529014A JPWO2015198544A1 JP WO2015198544 A1 JPWO2015198544 A1 JP WO2015198544A1 JP 2016529014 A JP2016529014 A JP 2016529014A JP 2016529014 A JP2016529014 A JP 2016529014A JP WO2015198544 A1 JPWO2015198544 A1 JP WO2015198544A1
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gear
ball bearing
box
axial direction
inner ring
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JP6455894B2 (en
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史人 神長
史人 神長
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Toyo Electric Manufacturing Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly

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  • General Details Of Gearings (AREA)
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Abstract

歯車箱（１）内の大歯車（２）に噛合する小歯車（３）が固定された歯車軸（４）上に、小歯車の軸方向一側と他側に位置させて夫々円筒ころ軸受（５）と玉軸受（６）とが装着された歯車装置の分解方法であって、玉軸受の外輪に外嵌する玉軸受箱（８）を歯車箱（１）から取り外して、玉軸受、歯車軸及び小歯車を玉軸受箱と共に歯車箱の外部に抜き出し、この状態で玉軸受を歯車軸から分離する工程を備えるものにおいて、玉軸受の内輪に引き抜き用段部を設けずに、玉軸受を歯車軸から分離できるようにする。小歯車（３）に形成した複数の透孔（３１）に対応する複数のロッド（９１）を有する治具（９）を用い、ロッド（９１）を小歯車（３）の軸方向一側から透孔（３１）に挿通して玉軸受（６）の内輪（６１）の端面に当接させ、内輪（６１）を歯車軸（４）に対しロッド（９１）より軸方向他側に押圧して、玉軸受（６）を歯車軸（４）から分離する。Cylindrical roller bearings positioned on one side and the other side of the small gear on the gear shaft (4) to which the small gear (3) meshing with the large gear (2) in the gear box (1) is fixed. (5) is a method of disassembling a gear device to which a ball bearing (6) is mounted, and a ball bearing box (8) fitted to the outer ring of the ball bearing is removed from the gear box (1), The ball bearing and the small gear are extracted together with the ball bearing box to the outside of the gear box. In this state, the ball bearing is separated from the gear shaft. Can be separated from the gear shaft. Using the jig (9) having a plurality of rods (91) corresponding to the plurality of through holes (31) formed in the small gear (3), the rod (91) is moved from one side in the axial direction of the small gear (3). It is inserted through the through hole (31) and brought into contact with the end face of the inner ring (61) of the ball bearing (6), and the inner ring (61) is pressed against the gear shaft (4) from the rod (91) to the other side in the axial direction. The ball bearing (6) is separated from the gear shaft (4).

Description

本発明は、鉄道車両等で使用される歯車装置の分解方法に関する。  The present invention relates to a method for disassembling a gear device used in a railway vehicle or the like.

鉄道車両では、主電動機からの動力を動輪軸に伝達するために、歯車箱内に、動輪軸に固定された大歯車と、主電動機に連結される歯車軸に固定された、大歯車に噛合する小歯車とを収納した歯車装置を使用している。  In a railway vehicle, in order to transmit the power from the main motor to the driving wheel shaft, the gear box meshes with a large gear fixed to the driving wheel shaft and a large gear fixed to the gear shaft connected to the main motor. A gear device that houses a small gear to be used is used.

従来、かかる歯車装置として、特許文献１により、歯車軸上に、小歯車の軸方向一側に位置させてラジアル荷重を担持する円筒ころ軸受と、小歯車の軸方向他側に位置させてラジアル荷重及びアキシャル荷重を担持する玉軸受とが装着され、歯車箱の軸方向一側の側壁部の開口に、円筒ころ軸受の外輪に外嵌するころ軸受箱が装着され、歯車箱の軸方向他側の側壁部の開口に、玉軸受の外輪に外嵌する玉軸受箱が装着されたものが知られている。  Conventionally, as such a gear device, according to Patent Document 1, a cylindrical roller bearing for carrying a radial load on one side of the small gear on the gear shaft and a radial on the other side of the small gear in the axial direction are disclosed. A ball bearing that carries a load and an axial load is mounted, and a roller bearing box that fits the outer ring of the cylindrical roller bearing is mounted on the opening of the side wall on one side in the axial direction of the gear box. 2. Description of the Related Art A ball bearing box that is externally fitted to an outer ring of a ball bearing is installed in an opening of a side wall portion on the side.

ここで、歯車装置の分解に際し、ころ軸受箱を歯車箱から取り外せば、ころ軸受の外輪がころ軸受箱と共に歯車軸から分離し、その後、ころ軸受の内輪の小歯車側の端面に係合する爪を有する治具を用いて、ころ軸受の内輪をころと共に歯車軸から分離することができる。然し、玉軸受は、内輪と外輪とが玉を介して軸方向に不動に連結されているため、玉軸受箱を歯車箱から取り外しても、玉軸受、歯車軸及び小歯車を玉軸受箱と共に歯車箱の外部に抜き出すことができるだけで、玉軸受の外輪を歯車軸から分離することはできない。  Here, when disassembling the gear device, if the roller bearing box is removed from the gear box, the outer ring of the roller bearing is separated from the gear shaft together with the roller bearing box, and then engaged with the end face of the inner ring of the roller bearing on the small gear side. The inner ring of the roller bearing can be separated from the gear shaft together with the roller by using a jig having a claw. However, in the ball bearing, since the inner ring and the outer ring are fixedly connected in the axial direction via the balls, even if the ball bearing box is removed from the gear box, the ball bearing, the gear shaft and the small gear are combined with the ball bearing box. The outer ring of the ball bearing cannot be separated from the gear shaft.

そこで、上記従来例のものでは、玉軸受の内輪を軸方向に２分割し、軸方向外側の内輪半部に外輪よりも軸方向外側に張出す引き抜き用段部を設けている。これによれば、段部に治具を引掛けた状態で軸方向外側の内輪半部を歯車軸から引き抜いた後、玉軸受箱を歯車箱から取り外すことで、玉軸受の外輪及び玉を玉軸受箱と共に歯車軸から分離できる。  Therefore, in the above-described conventional example, the inner ring of the ball bearing is divided into two in the axial direction, and an extraction step portion is provided on the outer half of the inner ring that extends outward in the axial direction from the outer ring. According to this, after the inner ring half on the outer side in the axial direction is pulled out from the gear shaft while the jig is hooked on the stepped portion, the ball bearing box is removed from the gear box, so that the outer ring and ball of the ball bearing are It can be separated from the gear shaft together with the bearing housing.

然し、このように玉軸受の内輪に引き抜き用段部を設けたのでは、玉軸受の軸方向寸法が大きくなり、歯車装置が大型化してしまう。  However, when the pulling step portion is provided on the inner ring of the ball bearing in this way, the axial dimension of the ball bearing becomes large and the gear device becomes large.

特開平９−１１９５１１号公報（段落００２０、００２３）JP-A-9-119511 (paragraphs 0020 and 0023)

本発明は、以上の点に鑑み、玉軸受の内輪に引き抜き用段部を設けずに、玉軸受を歯車軸から分離できるようにした歯車装置の分解方法を提供することをその課題としている。  This invention makes it the subject to provide the disassembly method of the gear apparatus which enabled it to isolate | separate a ball bearing from a gear shaft, without providing the step part for extraction in the inner ring | wheel of a ball bearing in view of the above point.

上記課題を解決するために、本発明は、歯車箱内の大歯車に噛合する小歯車が固定された歯車軸上に、小歯車の軸方向一側に位置させてラジアル荷重を担持する円筒ころ軸受と、小歯車の軸方向他側に位置させてラジアル荷重及びアキシャル荷重を担持する玉軸受とが装着され、歯車箱の軸方向一側の側壁部の開口に、円筒ころ軸受の外輪に外嵌するころ軸受箱が装着され、歯車箱の軸方向他側の側壁部の開口に、玉軸受の外輪に外嵌する玉軸受箱が装着された歯車装置の分解方法であって、玉軸受箱を歯車箱から取り外して、玉軸受、歯車軸及び小歯車を玉軸受箱と共に歯車箱の外部に抜き出し、この状態で玉軸受を歯車軸から分離する工程を備えるものにおいて、小歯車に、玉軸受の内輪の端面に臨む軸方向の透孔を周方向の間隔を存して複数形成しておき、これら透孔に対応する複数のロッドを有する治具を用い、これらロッドを小歯車の軸方向一側から透孔に挿通して玉軸受の内輪の端面に当接させ、玉軸受の内輪を歯車軸に対しロッドにより軸方向他側に押圧して、玉軸受を歯車軸から分離することを特徴とする。  In order to solve the above problems, the present invention provides a cylindrical roller for carrying a radial load on one side in the axial direction of a small gear on a gear shaft to which a small gear meshing with a large gear in a gear box is fixed. A bearing and a ball bearing that is positioned on the other side of the small gear in the axial direction and carries a radial load and an axial load are mounted. A disassembly method of a gear device in which a roller bearing box to be fitted is mounted, and a ball bearing box to be fitted to an outer ring of a ball bearing is mounted in an opening of a side wall portion on the other side in the axial direction of the gear box. Are removed from the gear box, the ball bearing, the gear shaft and the small gear are removed from the gear box together with the ball bearing box, and in this state, the ball bearing is separated from the gear shaft. The axial through holes facing the end face of the inner ring Using a jig having a plurality of rods corresponding to these through holes in advance, these rods are inserted into the through holes from one side in the axial direction of the small gear and brought into contact with the end face of the inner ring of the ball bearing, The ball bearing is separated from the gear shaft by pressing the inner ring of the ball bearing against the other side in the axial direction with a rod against the gear shaft.

本発明によれば、小歯車に形成した透孔に挿通されるロッドを有する治具を用いて、玉軸受を歯車軸から分離できる。従って、玉軸受の内輪に引き抜き用段部を設けずに済み、玉軸受の軸方向寸法の増加による歯車装置の大型化を回避できる。  According to the present invention, the ball bearing can be separated from the gear shaft by using a jig having a rod inserted into a through hole formed in the small gear. Therefore, it is not necessary to provide a drawing step on the inner ring of the ball bearing, and an increase in the size of the gear device due to an increase in the axial dimension of the ball bearing can be avoided.

本発明の方法で分解する歯車装置の要部の断面図。Sectional drawing of the principal part of the gear apparatus disassembled with the method of this invention. （ａ）（ｂ）（ｃ）本発明の実施形態の方法の各工程を示す説明図。(A) (b) (c) Explanatory drawing which shows each process of the method of embodiment of this invention.

図１を参照して、１は、鉄道車両で使用される歯車装置の歯車箱を示している。歯車箱１内には、図示省略した動輪軸に固定される大歯車２と、大歯車２に噛合する小歯車３とが収納されている。小歯車３は、図示省略した主電動機にたわみ継手を介して連結される歯車軸４上に締り嵌めで固定されている。尚、大歯車２及び小歯車３は、はすば歯車で構成されており、各歯車２、３にはラジアル荷重と共にアキシャル荷重が作用する。  Referring to FIG. 1, reference numeral 1 denotes a gear box of a gear device used in a railway vehicle. A large gear 2 fixed to a driving wheel shaft (not shown) and a small gear 3 meshing with the large gear 2 are accommodated in the gear box 1. The small gear 3 is fixed by an interference fit on a gear shaft 4 connected to a main motor (not shown) via a flexible joint. The large gear 2 and the small gear 3 are helical gears, and an axial load is applied to each of the gears 2 and 3 together with a radial load.

歯車軸４上には、小歯車３の軸方向一側に位置させてラジアル荷重を担持する円筒ころ軸受５と、小歯車３の軸方向他側に位置させてラジアル荷重及びアキシャル荷重を担持する４点接触形又は３点接触形の玉軸受６とが装着されている。円筒ころ軸受５は、内輪５１と外輪５２との間にリテーナ５３で保持される円筒形のころ５４を介設したもので、内輪５１が歯車軸４に締り嵌め状態で外嵌されている。また、玉軸受６は、内輪６１と外輪６２との間にリテーナ６３で保持される球形の玉６４を介設したもので、内輪６１が歯車軸４に締り嵌め状態で外嵌されている。尚、本実施形態では、円筒ころ軸受５を歯車軸４の軸端側に装着しているが、玉軸受６を歯車軸４の軸端側に装着してもよい。  On the gear shaft 4, a cylindrical roller bearing 5 is disposed on one side of the small gear 3 in the axial direction and carries a radial load, and is disposed on the other side in the axial direction of the small gear 3 to carry a radial load and an axial load. A four-point contact type or a three-point contact type ball bearing 6 is mounted. The cylindrical roller bearing 5 is provided with a cylindrical roller 54 held by a retainer 53 between an inner ring 51 and an outer ring 52, and the inner ring 51 is externally fitted to the gear shaft 4 in an interference fit state. The ball bearing 6 includes a spherical ball 64 held by a retainer 63 between an inner ring 61 and an outer ring 62, and the inner ring 61 is externally fitted to the gear shaft 4 in an interference fit state. In this embodiment, the cylindrical roller bearing 5 is mounted on the shaft end side of the gear shaft 4, but the ball bearing 6 may be mounted on the shaft end side of the gear shaft 4.

歯車箱１の軸方向両側の側壁部１１、１２には、小歯車３よりも大径の開口１１ａ、１２ａが形成されている。そして、歯車箱１の軸方向一側の側壁部１１の開口１１ａに、円筒ころ軸受５の外輪５２に締り嵌め状態で外嵌するころ軸受箱７を装着し、また、歯車箱１の軸方向他側の側壁部１２の開口１２ａに、玉軸受６の外輪６２に締り嵌め状態で外嵌する玉軸受箱８を装着している。玉軸受箱８の軸方向外側には、軸受蓋８１と小蓋８２とが取付けられ、これら軸受蓋８１と小蓋８２で囲われる歯車軸４の部分に、歯車箱１内の潤滑油の漏れを防止する筒状の油切り部材４１を装着している。  Openings 11 a and 12 a having a diameter larger than that of the small gear 3 are formed in the side wall portions 11 and 12 on both sides in the axial direction of the gear box 1. Then, a roller bearing box 7 that is externally fitted to the outer ring 52 of the cylindrical roller bearing 5 is fitted in the opening 11 a of the side wall 11 on the axial direction side of the gear box 1. A ball bearing box 8 that is externally fitted to the outer ring 62 of the ball bearing 6 in an interference fit state is mounted in the opening 12a of the side wall portion 12 on the other side. A bearing lid 81 and a small lid 82 are attached to the outside of the ball bearing box 8 in the axial direction, and the lubricating oil in the gear box 1 leaks into the portion of the gear shaft 4 surrounded by the bearing lid 81 and the small lid 82. A cylindrical oil draining member 41 is attached to prevent this.

また、小歯車３には、玉軸受６の内輪６１の端面に臨む透孔３１が周方向の間隔を存して複数形成されている。  Further, the small gear 3 is formed with a plurality of through holes 31 facing the end face of the inner ring 61 of the ball bearing 6 at intervals in the circumferential direction.

歯車装置を分解する際は、先ず、図２（ａ）に示す如くころ軸受箱７を歯車箱１から取り外す。この際、ころ軸受箱７と共に円筒ころ軸受５の外輪５２が引き抜かれるから、後で適宜の治具を用いてころ軸受箱７から外輪５２を取り外す。  When disassembling the gear device, first, the roller bearing box 7 is removed from the gear box 1 as shown in FIG. At this time, since the outer ring 52 of the cylindrical roller bearing 5 is pulled out together with the roller bearing box 7, the outer ring 52 is removed from the roller bearing box 7 later using an appropriate jig.

次に、小蓋８２と軸受蓋８１とを順に取り外してから、図２（ｂ）に示す如く玉軸受箱８を歯車箱１から取り外して、玉軸受６、歯車軸４及び小歯車３を玉軸受箱８と共に歯車箱１の外部に抜き出す。尚、歯車軸４には円筒ころ軸受５の内輪５１が外嵌しているから、歯車軸４を抜き出した後に、内輪５１の小歯車３側の端面に係合する爪を有する治具を用いて、内輪５１及びころ５４を歯車軸４から分離する。  Next, after removing the small lid 82 and the bearing lid 81 in order, the ball bearing box 8 is removed from the gear box 1 as shown in FIG. 2B, and the ball bearing 6, the gear shaft 4 and the small gear 3 are The bearing box 8 is extracted outside the gear box 1. Since the inner ring 51 of the cylindrical roller bearing 5 is fitted on the gear shaft 4, a jig having a claw that engages with the end surface of the inner ring 51 on the small gear 3 side is used after the gear shaft 4 is extracted. Thus, the inner ring 51 and the roller 54 are separated from the gear shaft 4.

次に、図２（ｃ）に示す如く、小歯車３に形成した複数の透孔３１に対応する複数のロッド９１を有する治具９を用い、これらロッド９１を小歯車３の軸方向一側（円筒ころ軸受５が装着される側、図２（ｃ）の下方）から透孔３１に挿通して玉軸受６の内輪６１の端面に当接させる。そして、玉軸受６の内輪６１を歯車軸４に対しロッド９１により軸方向他側（図２（ｃ）の上方）に押圧して、玉軸受６を玉軸受箱８及び油切り部材４１と共に歯車軸４から分離する。その後、玉軸受６の外輪６２の図２（ｃ）で下方の端面に当接する筒状治具により外輪６２を玉軸受箱８に対し上方に押圧して、玉軸受６を玉軸受箱８から分離する。  Next, as shown in FIG. 2C, a jig 9 having a plurality of rods 91 corresponding to the plurality of through holes 31 formed in the small gear 3 is used, and these rods 91 are connected to one side in the axial direction of the small gear 3. It is inserted into the through hole 31 from the side where the cylindrical roller bearing 5 is mounted, the lower side of FIG. Then, the inner ring 61 of the ball bearing 6 is pressed against the gear shaft 4 by the rod 91 to the other side in the axial direction (above FIG. 2C), and the ball bearing 6 is geared together with the ball bearing box 8 and the oil draining member 41. Separate from shaft 4. Thereafter, the outer ring 62 is pressed upward against the ball bearing box 8 by a cylindrical jig that contacts the lower end surface of the outer ring 62 of the ball bearing 6 in FIG. To separate.

本実施形態の分解方法によれば、小歯車３に形成した透孔３１に挿通されるロッド９１を有する治具９を用いて、玉軸受６を歯車軸４から分離できる。従って、玉軸受６の内輪６１に従来例の如く引き抜き用段部を設けずに済み、玉軸受６の軸方向寸法の増加による歯車装置の大型化を回避できる。  According to the disassembling method of the present embodiment, the ball bearing 6 can be separated from the gear shaft 4 using the jig 9 having the rod 91 inserted into the through hole 31 formed in the small gear 3. Therefore, it is not necessary to provide a drawing step on the inner ring 61 of the ball bearing 6 as in the conventional example, and the enlargement of the gear device due to an increase in the axial dimension of the ball bearing 6 can be avoided.

１…歯車箱、１１，１２…側壁部、１１ａ，１２ａ…開口、２…大歯車、３…小歯車、３１…透孔、４…歯車軸、５…円筒ころ軸受、６…玉軸受、５１，６１…内輪、５２，６２…外輪、７…ころ軸受箱、８…玉軸受箱、９…治具、９１…ロッド。  DESCRIPTION OF SYMBOLS 1 ... Gear box, 11, 12 ... Side wall part, 11a, 12a ... Opening, 2 ... Large gear, 3 ... Small gear, 31 ... Through-hole, 4 ... Gear shaft, 5 ... Cylindrical roller bearing, 6 ... Ball bearing, 51 , 61 ... Inner ring, 52, 62 ... Outer ring, 7 ... Roller bearing box, 8 ... Ball bearing box, 9 ... Jig, 91 ... Rod.

Claims (1)

歯車箱内の大歯車に噛合する小歯車が固定された歯車軸上に、小歯車の軸方向一側に位置させてラジアル荷重を担持する円筒ころ軸受と、小歯車の軸方向他側に位置させてラジアル荷重及びアキシャル荷重を担持する玉軸受とが装着され、歯車箱の軸方向一側の側壁部の開口に、円筒ころ軸受の外輪に外嵌するころ軸受箱が装着され、歯車箱の軸方向他側の側壁部の開口に、玉軸受の外輪に外嵌する玉軸受箱が装着された歯車装置の分解方法であって、
玉軸受箱を歯車箱から取り外して、玉軸受、歯車軸及び小歯車を玉軸受箱と共に歯車箱の外部に抜き出し、この状態で玉軸受を歯車軸から分離する工程を備えるものにおいて、
小歯車に、玉軸受の内輪の端面に臨む軸方向の透孔を周方向の間隔を存して複数形成しておき、これら透孔に対応する複数のロッドを有する治具を用い、これらロッドを小歯車の軸方向一側から透孔に挿通して玉軸受の内輪の端面に当接させ、玉軸受の内輪を歯車軸に対しロッドにより軸方向他側に押圧して、玉軸受を歯車軸から分離することを特徴とする歯車装置の分解方法。A cylindrical roller bearing that carries a radial load on one side in the axial direction of the small gear on the gear shaft fixed to the small gear that meshes with the large gear in the gear box, and that is located on the other side in the axial direction of the small gear And a ball bearing that carries a radial load and an axial load is mounted, and a roller bearing box that is externally fitted to the outer ring of the cylindrical roller bearing is mounted to the opening of the side wall portion on the axial direction side of the gear box. A method of disassembling a gear device in which a ball bearing box that fits externally on an outer ring of a ball bearing is attached to the opening of the side wall on the other side in the axial direction
The ball bearing box is removed from the gear box, and the ball bearing, the gear shaft and the small gear are extracted together with the ball bearing box to the outside of the gear box, and in this state, the ball bearing is separated from the gear shaft.
A plurality of axial through holes facing the end face of the inner ring of the ball bearing are formed in the small gear with a circumferential interval, and a jig having a plurality of rods corresponding to these through holes is used. Is inserted into the through hole from one side in the axial direction of the small gear and brought into contact with the end face of the inner ring of the ball bearing, and the inner ring of the ball bearing is pressed against the other side in the axial direction by the rod against the gear shaft. A disassembling method for a gear device, wherein the gear device is separated from a shaft.
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