JP3289528B2 - Method and apparatus for removing heat from bearing inner ring shrink-fitted to hollow shaft - Google Patents
Method and apparatus for removing heat from bearing inner ring shrink-fitted to hollow shaftInfo
- Publication number
- JP3289528B2 JP3289528B2 JP31571294A JP31571294A JP3289528B2 JP 3289528 B2 JP3289528 B2 JP 3289528B2 JP 31571294 A JP31571294 A JP 31571294A JP 31571294 A JP31571294 A JP 31571294A JP 3289528 B2 JP3289528 B2 JP 3289528B2
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- bearing inner
- heating
- hollow shaft
- fitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Automatic Assembly (AREA)
- Mounting Of Bearings Or Others (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軌道車輛の中空車軸の
ような中空軸に焼ばめされた軸受内輪を加熱して抜き取
るための方法、及びその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for heating and removing a bearing inner ring fitted to a hollow shaft such as a hollow axle of a track vehicle.
【０００２】[0002]
【従来の技術】軌道車輛などの車軸に装着された軸受
は、定期点検などのために分解することがある。図４な
いし図６に示されるように、軌道車輛の車軸Ｓの両端部
には、車輪Ｗが装着され、更にその外側には、車体を支
持するための軸受Ｂがそれぞれ装着されている。定期点
検などのために、車軸Ｓから軸受Ｂを抜き取るには、ま
ず軸受外輪３１を取り外した後に、コロ３２を取り外
し、更にその後に、焼ばめされている軸受内輪３３を加
熱して膨張させることにより、車軸Ｓとの嵌合を弛め
て、抜き取っている。2. Description of the Related Art A bearing mounted on an axle such as a railroad vehicle may be disassembled for periodic inspection. As shown in FIGS. 4 to 6, wheels W are mounted on both ends of an axle S of a tracked vehicle, and bearings B for supporting the vehicle body are further mounted outside the wheels W, respectively. To remove the bearing B from the axle S for periodic inspection, etc., first remove the bearing outer ring 31, then remove the roller 32, and then heat and expand the shrink-fitted bearing inner ring 33. By doing so, the fitting with the axle S is loosened and removed.
【０００３】近年、車軸Ｓの材質は、ますます強靱とな
り、軽量化、高速化などのために車軸Ｓは、中空軸が多
く用いられるに至った。軸受内輪の抜取り時には、これ
を加熱するのであるが、車軸が中空軸であると、中実軸
に比較して、伝導伝熱による膨張が大きくなって、軸受
内輪の抜取りが困難となる。また、中空軸であるため
に、中実軸を対象にした従来の油圧などによる加圧抜き
では、中実軸よりも強度の小さい中空軸に強大な力が作
用して、軸受内輪に機械的損傷を与え、この点において
も軸受内輪の抜取りが困難となる。車軸から抜き取られ
た軸受は、その寿命に至るまで何回も使用されるもので
ある。このような事情の下において中空軸に焼ばめされ
ている軸受内輪を加熱と加圧とによって無理やり抜き取
ると、この軸受内輪に熱的、或いは機械的な損傷を与え
て、再使用ができなくなる。このため、関係者の間にお
いて、この問題を解決できる有効な手法の出現が切望さ
れていた。In recent years, the material of the axle S has become more and more tough, and a hollow axle S has been used in many cases in order to reduce the weight and increase the speed. When the bearing inner ring is removed, the bearing inner ring is heated. However, if the axle is a hollow shaft, expansion due to conduction heat transfer becomes larger than that of a solid axle, making removal of the bearing inner ring difficult. In addition, because of the hollow shaft, when pressure is released by conventional hydraulic pressure or the like for a solid shaft, a strong force acts on the hollow shaft, which is smaller in strength than the solid shaft, and mechanically acts on the bearing inner ring. Damage is caused, and in this regard, it is difficult to remove the bearing inner ring. Bearings removed from an axle are used many times over their life. Under such circumstances, if the bearing inner ring shrink-fitted to the hollow shaft is forcibly removed by heating and pressurizing, the bearing inner ring is thermally or mechanically damaged and cannot be reused. . For this reason, there has been a keen need among concerned parties for the emergence of an effective method capable of solving this problem.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記した実
情に鑑み、中空軸に焼ばめされている軸受内輪に熱的、
或いは機械的な損傷を与えることなく、最低加熱温度で
軸受内輪を加熱して、これを容易に、しかも確実に抜き
取ることを課題としている。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has been described in view of the above circumstances.
Another object of the present invention is to heat the bearing inner ring at the minimum heating temperature without causing any mechanical damage, and to easily and surely remove the inner ring.
【０００５】[0005]
【課題を解決するための手段】この課題を解決するため
に本発明の採用した手段は、軌道車輛の中空車軸のよう
な中空軸に焼ばめされた軸受内輪を加熱して抜き取るに
際して、そのロッドが中空軸に挿入されて位置決めさ
れ、該ロッドに設けられた鍔部によって抜取り時の反力
を受けるようになっている油圧ラムの油圧力を軸受内輪
の抜取り力に変換して、該軸受内輪に抜取り力を作用さ
せた状態で、軸受内輪の外周に配設された加熱コイルに
高周波電流を流して、該軸受内輪を高周波誘導加熱し
て、これを抜き取るように構成したことである。SUMMARY OF THE INVENTION In order to solve this problem, the present invention employs a method for heating and removing a bearing inner ring shrink-fitted on a hollow shaft such as a hollow axle of a track vehicle. The rod is inserted into the hollow shaft and positioned, and the flange of the rod converts the hydraulic pressure of the hydraulic ram, which receives a reaction force at the time of extraction, into the extraction force of the inner ring of the bearing. A high-frequency current is applied to a heating coil disposed on the outer periphery of the bearing inner ring in a state where a pulling force is applied to the inner ring, and the bearing inner ring is subjected to high-frequency induction heating to extract the same.
【０００６】[0006]
【発明の作用】油圧ラムによって中空軸に焼ばめされた
軸受内輪に抜取り力が加えられた状態で、該軸受内輪
は、その外周部から高周波電源によって誘導加熱されて
いる。軸受内輪は高周波電源により誘導加熱されている
ために、交流電流の「表皮効果」によって、軸受内輪の
表層部（外周部）のみが集中的に誘導加熱され、その内
周部は伝導伝熱を主体にして加熱されて全体が膨張する
ため、中空軸の加熱（或いは膨張）の程度は少ない。そ
して、高周波誘導加熱による熱膨張によって、軸受内輪
と中空軸との嵌合が緩んだ瞬間において、軸受内輪に常
時作用している抜取り力によって、中空軸から該軸受内
輪が抜き取られる。このため、軸受内輪は、最低加熱温
度によって抜き取ることが可能となって、高温加熱によ
る変質を防止できると共に、中空軸の膨張が少ないため
に、抜取り力そのものも小さくなって、軸受内輪に機械
的損傷を与えなくて済む。The bearing inner ring is induction-heated from its outer periphery by a high-frequency power source while a pulling force is applied to the bearing inner ring shrink-fitted to the hollow shaft by the hydraulic ram. Since the bearing inner ring is induction-heated by the high-frequency power supply, only the surface layer (outer periphery) of the bearing inner ring is intensively heated by the “skin effect” of the alternating current, and the inner periphery of the inner periphery carries conduction heat transfer. Since the entire body expands by being heated mainly, the degree of heating (or expansion) of the hollow shaft is small. Then, at the moment when the fitting between the bearing inner ring and the hollow shaft is loosened due to the thermal expansion due to the high-frequency induction heating, the bearing inner ring is pulled out of the hollow shaft by the pulling force constantly acting on the bearing inner ring. For this reason, the bearing inner ring can be extracted at the minimum heating temperature, preventing deterioration due to high-temperature heating, and because the expansion of the hollow shaft is small, the extraction force itself is also reduced, and the bearing inner ring is mechanically attached to the bearing inner ring. No damage is required.
【０００７】[0007]
【実施例】以下、実施例を挙げて、本発明を更に詳細に
説明する。図１は、本発明に係る加熱抜取り装置によっ
て軸受内輪を抜き取っている状態の全体斜視図であり、
図２は、同じく断面図であり、図３は、同じく軸受内輪
の抜取り途中の断面図である。図１及び図２において、
台車１には、平行定規機構Ｍを介してテーブル２が昇降
シリンダ３の作用によって水平を維持して昇降可能に取
付けられている。このテーブル２には、取付け台４を介
して油圧ラムＲを構成するシリンダ５が水平に取付けら
れている。この油圧ラムＲのシリンダ５の開口側の端部
には、フランジ板５ａが設けられている。油圧ラムＲを
構成するロッド６の先端部は、中空軸から成る車軸Ｓの
中空部に挿入されて、該車軸Ｓに対する油圧ラムＲの位
置決めを行うためのガイド部６ａとなっており、このロ
ッド６の中間部には、軸受内輪３３の抜取り時におい
て、抜取り力の反力を受けるための鍔部６ｂが設けられ
ている。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. FIG. 1 is an overall perspective view of a state where a bearing inner ring is being extracted by a heating extraction device according to the present invention,
FIG. 2 is a cross-sectional view, and FIG. 3 is a cross-sectional view of the same while the bearing inner ring is being removed. 1 and 2,
A table 2 is mounted on the carriage 1 via a parallel ruler mechanism M so as to be able to move up and down while maintaining a horizontal position by the action of a lifting cylinder 3. A cylinder 5 constituting a hydraulic ram R is horizontally mounted on the table 2 via a mounting table 4. A flange plate 5a is provided at an end of the hydraulic ram R on the opening side of the cylinder 5. The tip of the rod 6 constituting the hydraulic ram R is inserted into the hollow portion of the axle S composed of a hollow shaft, and serves as a guide portion 6a for positioning the hydraulic ram R with respect to the axle S. 6 is provided with a flange portion 6b for receiving a reaction force of the extraction force when the bearing inner ring 33 is extracted.
【０００８】軸受内輪３３の抜取り時に、該軸受内輪３
３の内側の端面に引っ掛けるための抜取り板７は、リン
グ板を二つ割状にした一対の半割リング板７ａから成っ
て、その内周側の端部は、軸受内輪３３の端面に引っ掛
け易いようにエッジ状に形成されている。一対の半割リ
ング板７ａは、これを結合させてリング板状にした状態
において相対向する二箇所で備え付けの連結ボルト８を
介して一体に連結される。油圧ラムＲを構成するシリン
ダ５に設けられたフランジ板５ａと、前記抜取り板７と
は、二本の抜取りロッド９を介して連結される。抜取り
ロッド９における抜取り板７に連結される側の端部には
雄ねじ部９ａが形成されていて、該雄ねじ部９ａとナッ
ト１１との螺合により、抜取り板７と抜取りロッド９と
が着脱可能に連結される構造になっている。When removing the bearing inner ring 33, the bearing inner ring 3
The extraction plate 7 for hooking on the inner end surface of the inner ring 3 is composed of a pair of half ring plates 7a in which a ring plate is divided into two, and the inner peripheral end thereof is hooked on the end surface of the bearing inner ring 33. It is formed in an edge shape so as to be easy. The pair of half ring plates 7a are integrally connected to each other at two locations facing each other via provided connection bolts 8 in a state where they are combined into a ring plate shape. The flange plate 5 a provided on the cylinder 5 constituting the hydraulic ram R and the extraction plate 7 are connected via two extraction rods 9. An external thread 9a is formed at the end of the extraction rod 9 on the side connected to the extraction plate 7, and the extraction plate 7 and the extraction rod 9 are detachable by screwing the male screw 9a and the nut 11. It is structured to be connected to.
【０００９】本発明においては、軸受内輪３３は、高周
波電源により誘導加熱されるため、高周波誘導加熱装置
Ｈが必要となる。この誘導加熱装置Ｈは、可搬式の高周
波電源発生装置１２（出力周波数：１０〜３０ＫＨ
ｚ）、加熱コイル１３、昇圧ユニット１４とを備えてい
て、巻回された加熱コイル１３の内周面には、絶縁体か
ら成るリング状の一対の位置決め具１５が一体に取付け
られていて、この一対の位置決め具１５を介して加熱コ
イル１３は、軸受内輪３３の外周部にこれとほぼ同心と
なって配設される。昇圧ユニット１４は、前記テーブル
２に取付けられていて、加熱コイル１３は、車軸Ｓに対
して軸受内輪３３と一体となって移動可能になってい
る。なお、図１において、１６は、高周波電源発生装置
１２と昇圧ユニット１４とを接続している電線であり、
１７は、油圧ラムＲを作動させるための油圧ポンプであ
り、１８は、この油圧ポンプ１７と油圧ラムＲとを接続
している油圧ホースを示す。In the present invention, since the bearing inner ring 33 is induction-heated by a high-frequency power supply, a high-frequency induction heating device H is required. This induction heating device H is a portable high-frequency power generator 12 (output frequency: 10 to 30 KH).
z), a heating coil 13 and a step-up unit 14, and a pair of ring-shaped positioning members 15 made of an insulator are integrally attached to the inner peripheral surface of the wound heating coil 13, The heating coil 13 is arranged on the outer peripheral portion of the bearing inner ring 33 so as to be substantially concentric with the pair of positioning members 15. The step-up unit 14 is attached to the table 2, and the heating coil 13 can move integrally with the bearing inner ring 33 with respect to the axle S. In FIG. 1, reference numeral 16 denotes an electric wire connecting the high-frequency power generator 12 and the booster unit 14,
Reference numeral 17 denotes a hydraulic pump for operating the hydraulic ram R, and reference numeral 18 denotes a hydraulic hose connecting the hydraulic pump 17 and the hydraulic ram R.
【００１０】上記した加熱抜取り装置によって、車軸Ｓ
の両端部に焼ばめされている軸受内輪３３を抜き取るに
は、以下のようにして行う。車軸Ｓの両端部に車輪Ｗが
装着された状態で、両車輪Ｗは、レール１９に載せられ
ている。まず、油圧ラムＲのロッド６が車軸Ｓの一方の
端面と相対向するようにして、台車１を配置し、この状
態において、台車１に装着されている昇降シリンダ３に
よりテーブル２を昇降させると共に、台車１を左右、前
後に移動させて、油圧ラムＲのロッド６の先端部のガイ
ド部６ａを車軸Ｓの中空部に挿入して、車軸Ｓに対する
台車１の位置決めを行うと共に、高周波誘導加熱装置Ｈ
を構成する加熱コイル１３を軸受内輪３３の外周部に配
設する。次に、抜取り板７を構成する一対の半リング板
７ａの内周部のエッジ状となった部分を軸受内輪３３の
内側の端面に引っ掛けて、該一対の半リング板７ａを連
結ボルト８で連結し、その後に、抜取りロッド９の端部
の雄ねじ部９ａとナット１１とを螺合させて、油圧ラム
Ｒを構成するシリンダ５のフランジ板５ａと抜取り板７
とを二本の抜取りロッド９を介して連結する。The axle S
In order to remove the bearing inner ring 33 shrink-fitted at both ends, the following procedure is performed. Both wheels W are mounted on rails 19 with the wheels W mounted on both ends of the axle S. First, the truck 1 is arranged so that the rod 6 of the hydraulic ram R faces one end surface of the axle S. In this state, the table 2 is lifted and lowered by the lifting cylinder 3 mounted on the truck 1. The bogie 1 is moved left and right, back and forth, and the guide portion 6a at the tip of the rod 6 of the hydraulic ram R is inserted into the hollow portion of the axle S to position the bogie 1 with respect to the axle S and to perform high-frequency induction heating. Device H
Is disposed on the outer peripheral portion of the bearing inner ring 33. Next, the edge-shaped portions of the inner peripheral portions of the pair of half-ring plates 7a constituting the extraction plate 7 are hooked on the inner end surface of the bearing inner ring 33, and the pair of half-ring plates 7a are connected with the connecting bolts 8. After connection, the external thread 9a at the end of the extraction rod 9 and the nut 11 are screwed together, and the flange plate 5a and the extraction plate 7 of the cylinder 5 constituting the hydraulic ram R are connected.
Are connected via two extraction rods 9.
【００１１】そして、油圧ラムＲを作動させて、その油
圧力を、自身のシリンダ５、前記二本の抜取りロッド
９、及び前記抜取り板７を介して軸受内輪３３の抜取り
力に変換して、該軸受内輪３３に抜取り力を作用させた
状態にして、高周波誘導加熱装置Ｈを作動させて、その
加熱コイル１３に高周波電流を流す。軸受内輪３３は、
高周波電源により誘導加熱されるために、軸受内輪３３
は、交流電流の「表皮効果」（交流電流は、その周波数
が高くなるほど、これを通じている導体の表面に集まっ
て、中心部ほど流れにくくなる現象）によってその表層
部（外周部）のみが集中的に誘導加熱され、その内周部
は、伝導伝熱を主体にして加熱されて全体が膨張するた
めに、中空軸である車軸Ｓの加熱の程度が少ない。この
高周波誘導加熱による軸受内輪３３の熱膨張によって、
軸受内輪３３と車軸Ｓとの嵌合が緩んだ瞬間において、
軸受内輪３３に常時作用している抜取り力によって、油
圧ラムＲのシリンダ５が後退して（図３参照）、軸受内
輪３３、加熱コイル１３、抜取り板７及び抜取りロッド
９は、一体となって車軸Ｓから抜き取られる。この抜取
り力の反力は、油圧ラムＲを構成するロッド６の鍔部６
ｂに作用する。また、油圧ラムＲを構成するロッド６の
先端部のガイド部６ａが車軸Ｓの中空部に挿入されてい
て、抜取り力の作用方向が車軸Ｓの軸心方向と正確に一
致して、油圧力の全てが抜取り力として作用するため、
最少の抜取り力でもって確実に軸受内輪３３を抜き取る
ことができる。Then, by operating the hydraulic ram R, the hydraulic pressure is converted into a withdrawal force of the bearing inner ring 33 through its own cylinder 5, the two withdrawal rods 9, and the withdrawal plate 7, With the extraction force applied to the bearing inner ring 33, the high-frequency induction heating device H is operated, and a high-frequency current flows through the heating coil 13. The bearing inner ring 33 is
Due to induction heating by the high frequency power supply, the bearing inner ring 33
Is a phenomenon that the alternating current gathers on the surface of the conductor passing through it as the frequency increases, and the central portion becomes harder to flow. The inner peripheral portion is heated mainly by conduction heat transfer and expands as a whole, so that the degree of heating of the axle S, which is a hollow shaft, is small. Due to the thermal expansion of the bearing inner ring 33 due to this high-frequency induction heating,
At the moment when the fitting between the bearing inner ring 33 and the axle S is loosened,
The cylinder 5 of the hydraulic ram R is retracted by the extraction force constantly acting on the bearing inner ring 33 (see FIG. 3), and the bearing inner ring 33, the heating coil 13, the extraction plate 7 and the extraction rod 9 are integrated. Removed from axle S. The reaction force of this withdrawal force is caused by the flange 6 of the rod 6 constituting the hydraulic ram R.
Acts on b. Further, the guide portion 6a at the tip end of the rod 6 constituting the hydraulic ram R is inserted into the hollow portion of the axle S, and the action direction of the extraction force exactly matches the axial direction of the axle S, and the hydraulic pressure All act as extraction force,
The bearing inner ring 33 can be reliably removed with the minimum removal force.
【００１２】軸受内輪３３の抜取り後においては、上記
の逆の操作によって、ナット１１を弛めて抜取り板７と
抜取りロッド９とを分離させると共に、連結ボルト８を
弛めて抜取り板７を構成する一対の半割リング板７ａを
分離して、油圧ラムＲのロッド６の部分から軸受内輪３
３を取り外す。After the removal of the bearing inner ring 33, the nut 11 is loosened to separate the extraction plate 7 and the extraction rod 9 by the reverse operation, and the connecting bolt 8 is loosened to form the extraction plate 7. Of the bearing inner ring 3 from the rod 6 of the hydraulic ram R
Remove 3
【００１３】また、上記実施例のように、加熱抜取り装
置が台車１に装着されて可搬式となっている場合には、
車軸Ｓの他方に焼ばめされている軸受内輪３３を抜き取
る場合には、車軸Ｓの反対側に台車１を移動させて、抜
取り作業を行うことが可能となって、車軸Ｓを反転させ
なくても、その両端に焼ばめされている軸受内輪３３の
抜取りができる。更に、上記実施例のように、昇降シリ
ンダ３によって加熱抜取り装置を装着したテーブル２が
昇降可能な構造の場合には、床面を基準にした車軸Ｓの
高さが異なる場合においても、装置全体の高さ調整を行
うことにより、異なる高さの車軸に焼ばめされている軸
受内輪の抜取りが可能となる。Further, as in the above embodiment, when the heating and extracting device is mounted on the carriage 1 and is portable,
When extracting the bearing inner ring 33 shrink-fitted on the other side of the axle S, the bogie 1 can be moved to the opposite side of the axle S to perform the extraction operation, and the axle S is not turned over. However, the bearing inner ring 33 shrink-fitted at both ends can be removed. Further, as in the above embodiment, when the table 2 on which the heating and extracting device is mounted can be moved up and down by the elevating cylinder 3, even if the height of the axle S with respect to the floor surface is different, the entire device is By performing the height adjustment, it is possible to remove the bearing inner ring shrink-fitted on axles having different heights.
【００１４】なお、上記実施例は、軌道車輛の車軸に焼
ばめされている軸受内輪を抜き取る例であるが、本発明
に係る加熱抜取り装置は、他の中空軸に焼ばめされてい
る軸受内輪の抜き取りも可能である。Although the above embodiment is an example in which a bearing inner ring which is shrink-fitted to an axle of a track vehicle is extracted, the heating extraction device according to the present invention is shrink-fitted to another hollow shaft. Extraction of the bearing inner ring is also possible.
【００１５】[0015]
【発明の効果】本発明は、油圧ラムによって軸受内輪に
抜取り力を作用させた状態で、該軸受内輪をその外周部
から高周波電源によって誘導加熱して、軸受内輪を膨張
させることにより中空軸から抜き取る構成であって、高
周波誘導加熱のために、交流電流の「表皮効果」によっ
て軸受内輪の表層部（外周部）のみが集中的に誘導加熱
され、その内周部は伝導伝熱を主体にして加熱されて軸
受内輪の全体が膨張するために、中空軸の加熱（或いは
膨張）の程度は少なくなって、軸受内輪と中空軸との嵌
合が緩んだ瞬間において、軸受内輪に常時作用している
抜取り力によって、中空軸から該軸受内輪が抜き取られ
るので、軸受内輪は、最低加熱温度によって抜き取るこ
とができて、高温加熱による変質を防止できると共に、
中空軸の膨張が少ないために、抜取り力そのものも小さ
くなって、大きな機械的損傷を与えることなく軸受内輪
の抜き取りを行える。According to the present invention, the bearing inner ring is induction-heated from its outer peripheral portion by a high-frequency power source in a state where a pulling force is applied to the bearing inner ring by the hydraulic ram, and the bearing inner ring is expanded from the hollow shaft by expanding the bearing inner ring. In this configuration, only the surface layer (outer periphery) of the bearing inner ring is intensively heated by the “skin effect” of AC current for high-frequency induction heating, and the inner periphery is mainly made of conductive heat transfer. Since the entire bearing inner ring expands due to heating, the degree of heating (or expansion) of the hollow shaft is reduced, and the moment the fitting between the bearing inner ring and the hollow shaft is loosened, it always acts on the bearing inner ring. Since the bearing inner ring is extracted from the hollow shaft by the extraction force, the bearing inner ring can be extracted at the minimum heating temperature, and the deterioration due to high temperature heating can be prevented.
Since the expansion of the hollow shaft is small, the pulling force itself is also small, and the bearing inner ring can be pulled out without causing significant mechanical damage.
【図１】本発明に係る加熱抜取り装置によって軸受内輪
３３を抜き取っている状態の斜視図である。FIG. 1 is a perspective view of a state in which a bearing inner ring 33 is being extracted by a heating extraction device according to the present invention.
【図２】同じく断面図である。FIG. 2 is a sectional view of the same.
【図３】同じく軸受内輪３３の抜取り途中の断面図であ
る。FIG. 3 is a sectional view of the bearing inner ring 33 in the process of being removed.
【図４】車軸Ｓの両端部に車輪Ｗと軸受Ｂとが装着され
た状態の正面図である。FIG. 4 is a front view of a state where wheels W and bearings B are mounted on both ends of an axle S;
【図５】軸受Ｂが装着された車軸Ｓの一端部の断面図で
ある。FIG. 5 is a sectional view of one end of an axle S on which a bearing B is mounted.
【図６】軸受Ｂの抜取りを説明するための断面図であ
る。FIG. 6 is a cross-sectional view for explaining removal of a bearing B.
Ｂ：軸受 Ｈ：高周波誘導加熱装置 Ｒ：油圧ラム Ｓ：車軸 ２：テーブル ５：油圧ラムのシリンダ ５ａ：フランジ板 ６：油圧ラムのロッド ６ａ：ロッドのガイド部 ６ｂ：ロッドの鍔部 ７：抜取り板 ７ａ：半割リング板 ９：抜取りロッド １３：加熱コイル B: Bearing H: High frequency induction heating device R: Hydraulic ram S: Axle 2: Table 5: Hydraulic ram cylinder 5a: Flange plate 6: Hydraulic ram rod 6a: Rod guide 6b: Rod flange 7: Pull-out Plate 7a: Half ring plate 9: Extraction rod 13: Heating coil
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−182628（ＪＰ，Ａ) 特開 平４−366024（ＪＰ，Ａ) 特開 平２−59276（ＪＰ，Ａ) 特開 昭49−100434（ＪＰ，Ａ) 実開 昭55−11312（ＪＰ，Ｕ) 実開 昭56−76331（ＪＰ，Ｕ) 実開 昭62−181381（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23P 19/00 - 21/00 F16C 35/06 B25B 27/06 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-182628 (JP, A) JP-A-4-366024 (JP, A) JP-A-2-59276 (JP, A) JP-A-49-49 100434 (JP, A) Japanese Utility Model Showa 55-11312 (JP, U) Japanese Utility Model Showa 56-76331 (JP, U) Japanese Utility Model Showa 62-181381 (JP, U) (58) Field surveyed (Int. 7 , DB name) B23P 19/00-21/00 F16C 35/06 B25B 27/06
Claims (3)
ばめされた軸受内輪を加熱して抜き取るための方法であ
って、 軸受内輪に抜取り力を作用させた状態で、該軸受内輪を
その外周部から高周波電源により誘導加熱して、最低加
熱温度で軸受内輪を抜き取ることを特徴とする中空軸に
焼ばめされた軸受内輪の加熱抜取り方法。1. A method for heating and extracting a bearing inner ring shrink-fitted on a hollow shaft such as a hollow axle of a track vehicle, wherein the bearing inner ring is subjected to a pulling force on the bearing inner ring. Wherein the bearing inner ring is extracted from the outer periphery thereof by induction heating with a high-frequency power source and the bearing inner ring is extracted at a minimum heating temperature.
ばめされた軸受内輪を加熱して抜き取るための装置であ
って、 リング板を二つ割状にした一対の半割リング板から成っ
て、中空軸に焼ばめされた軸受内輪の内側の端面に脱着
可能に引っ掛けられる抜取り板と、 シリンダの端面にフランジ板が設けられていると共に、
ロッドに、前記中空軸に挿入されて位置決めするための
ガイド部と、該中空軸の端面に当接して抜取り時の反力
を受けるための鍔部とが設けられた油圧ラムと、 該油圧ラムのシリンダの端面に設けられた前記フランジ
板と、前記抜取り板とを連結するための複数本の抜取り
ロッドと、 前記軸受内輪の外周に配設されて、該内輪を高周波電源
により誘導加熱するための加熱コイルを有する高周波誘
導加熱装置と、 を備え、前記油圧ラムの油圧力を、そのシリンダ、前記
複数本の抜取りロッド、及び前記抜取り板を介して該軸
受内輪の抜取り力に変換して、該軸受内輪に抜取り力を
作用させた状態で、該加熱コイルに高周波電流を流して
軸受内輪を高周波誘導加熱して、最低加熱温度で軸受内
輪を抜き取るように構成したことを特徴とする中空軸に
焼ばめされた軸受内輪の加熱抜取り装置。2. A device for heating and extracting a bearing inner ring shrink-fitted on a hollow shaft, such as a hollow axle of a track vehicle, comprising a pair of half ring plates in which a ring plate is divided into two. A removal plate that is detachably hooked on the inner end surface of the bearing inner ring shrink-fitted to the hollow shaft, and a flange plate is provided on the end surface of the cylinder,
A hydraulic ram provided on a rod with a guide portion inserted into the hollow shaft for positioning, and a flange portion for contacting an end surface of the hollow shaft and receiving a reaction force at the time of extraction; The flange plate provided on the end face of the cylinder, a plurality of extraction rods for connecting the extraction plate, and disposed on the outer periphery of the bearing inner ring, for induction heating the inner ring by a high-frequency power supply A high-frequency induction heating device having a heating coil, comprising: converting the hydraulic pressure of the hydraulic ram into a removal force of the bearing inner ring via the cylinder, the plurality of removal rods, and the removal plate; In a state in which a high-frequency current is passed through the heating coil to perform high-frequency induction heating of the bearing inner ring in a state where a pulling force is applied to the bearing inner ring, the bearing inner ring is extracted at a minimum heating temperature. Bearing inner ring of the heating extraction devices shrink-fit to.
台車に昇降可能に装着されたテーブルに一体となって取
付けられていることを特徴とする請求項２に記載の中空
軸に焼ばめされた軸受内輪の加熱抜取り装置。3. The hydraulic ram and the induction heating device,
The heating and removing device for a bearing inner ring shrink-fitted to a hollow shaft according to claim 2, wherein the bearing inner ring is shrink-fitted to a table, which is integrally mounted on a table which is mounted on a carriage so as to be able to move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31571294A JP3289528B2 (en) | 1994-11-25 | 1994-11-25 | Method and apparatus for removing heat from bearing inner ring shrink-fitted to hollow shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31571294A JP3289528B2 (en) | 1994-11-25 | 1994-11-25 | Method and apparatus for removing heat from bearing inner ring shrink-fitted to hollow shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08150524A JPH08150524A (en) | 1996-06-11 |
| JP3289528B2 true JP3289528B2 (en) | 2002-06-10 |
Family
ID=18068634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31571294A Expired - Fee Related JP3289528B2 (en) | 1994-11-25 | 1994-11-25 | Method and apparatus for removing heat from bearing inner ring shrink-fitted to hollow shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3289528B2 (en) |
Cited By (1)
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|---|---|---|---|---|
| JP2009131744A (en) * | 2007-11-29 | 2009-06-18 | Chugoku Electric Power Co Inc:The | Drawing out method of coal mill roller |
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| DE102005021484A1 (en) * | 2005-05-10 | 2006-11-16 | Schaeffler Kg | Device for heating cylindrical metal workpiece or workpiece section by means of electromagnetic induction useful for joining or releasing a press- or shrinkage joint between inner ring of antifriction bearing |
| FR2889981B1 (en) * | 2005-08-26 | 2007-11-02 | Snecma | DEVICE FOR HEATING A CYLINDRICAL PIECE, USE IN THE ASSEMBLY OF AN INTER-TREE BEARING IN A TURBOMACHINE. |
| JP4915846B2 (en) * | 2006-06-29 | 2012-04-11 | 高周波熱錬株式会社 | Drawing jig for baking |
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-
1994
- 1994-11-25 JP JP31571294A patent/JP3289528B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009131744A (en) * | 2007-11-29 | 2009-06-18 | Chugoku Electric Power Co Inc:The | Drawing out method of coal mill roller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08150524A (en) | 1996-06-11 |
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