JPH0835523A - Axle cap - Google Patents
Axle capInfo
- Publication number
- JPH0835523A JPH0835523A JP17272394A JP17272394A JPH0835523A JP H0835523 A JPH0835523 A JP H0835523A JP 17272394 A JP17272394 A JP 17272394A JP 17272394 A JP17272394 A JP 17272394A JP H0835523 A JPH0835523 A JP H0835523A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical
- axle
- axle cap
- cap
- peripheral surface
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 30
- 230000006866 deterioration Effects 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 5
- 239000000806 elastomer Substances 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 16
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車軸の軸端に設けられ
る円筒環にその開口を閉塞するように装着される車軸用
キャップに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle cap mounted on a cylindrical ring provided at the shaft end of an axle so as to close its opening.
【０００２】[0002]
【従来の技術】従来では、図６に示すような実開平１−
８０５６９号公報で開示されている鉄道車両用の車軸装
置のように、車軸８１の軸端に設けられる円筒環８２の
端部に、有底円筒状の車軸用キャップを嵌着して外部か
らのゴミが軸受部に侵入することを防止するとともに、
車軸の検査をする際には、この車軸用キャップを外して
容易に検査が行えるようにしている。円筒環８２の端部
外周には周溝８３を設ける一方、車軸用キャップ８４
は、内周面に周溝８３と係合する環状凸部８９を有する
円筒部８６と、底部８８と、円筒部８６と底部８８を連
接する円錐部８７とで構成されている。この車軸用キャ
ップ８４を円筒環８２の端部外周に外嵌装着して、車軸
用キャップ８４の環状凸部８９を円筒環の周溝に係合す
るようになっている。2. Description of the Related Art Conventionally, as shown in FIG.
As in the axle device for a railroad vehicle disclosed in Japanese Patent No. 80569, a bottomed cylindrical axle cap is fitted to the end portion of the cylindrical ring 82 provided at the shaft end of the axle shaft 81 from the outside. While preventing dust from entering the bearing,
When inspecting the axle, the axle cap is removed to facilitate the inspection. A circumferential groove 83 is provided on the outer periphery of the end of the cylindrical ring 82, while an axle cap 84 is provided.
Is composed of a cylindrical portion 86 having an annular convex portion 89 that engages with the circumferential groove 83 on the inner peripheral surface, a bottom portion 88, and a conical portion 87 that connects the cylindrical portion 86 and the bottom portion 88. The axle cap 84 is fitted onto the outer periphery of the end portion of the cylindrical ring 82 so that the annular convex portion 89 of the axle cap 84 is engaged with the circumferential groove of the cylindrical ring.
【０００３】従来の車軸用キャップは、前述したよう
に、車軸に対して装着するとき、その鍔を円筒環の端縁
外周よりも拡径させてかぶせるようになっているため、
装着時に弾性的に拡径して装着後に元の大きさに縮径す
る性質が必要になる。つまり、車軸用キャップの性質と
して着脱のために所要量の伸び縮みが必要であることお
よび所要の強度が必要であることを考慮して、その素材
として合成ゴムと合成樹脂との中間の性質を持つ例えば
ウレタン系エラストマーが採用されている。As described above, the conventional axle cap is designed so that, when it is mounted on the axle, the brim is made larger in diameter than the outer circumference of the end edge of the cylindrical ring to be covered.
It is necessary to have the property of elastically expanding the diameter at the time of mounting and reducing the diameter to the original size after mounting. In other words, taking into account that the property of the axle cap requires expansion and contraction of the required amount for attachment and detachment and the required strength, an intermediate property between synthetic rubber and synthetic resin is considered as its material. For example, a urethane elastomer is used.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記従来の
車軸用キャップは、特に夏場など周辺環境温度が高い時
期において、車軸の回転などに伴う伝導熱を受けて温度
上昇すると、熱劣化して柔らかくなり、著しい強度低下
を伴う。そのような状況において、例えば車軸用キャッ
プの内部圧力が上昇したり、あるいは外部から衝撃を受
けたりしたときに、車軸用キャップが円筒環から不意に
脱落してしまうことがある。By the way, the above-mentioned conventional axle cap is softened due to thermal deterioration when the temperature rises due to the conduction heat associated with the rotation of the axle, especially when the ambient temperature is high such as in summer. With a marked decrease in strength. In such a situation, for example, when the internal pressure of the axle cap increases or when an impact is applied from the outside, the axle cap may unexpectedly fall off the cylindrical ring.
【０００５】このような場合、円筒環の内部が外部に露
呈してしまうため、外部の砂ぼこりや泥水などから円筒
環の内周側に存在する車軸や車軸支持用軸受（複列円筒
ころ軸受など）などを保護できなくなり、それらの寿命
低下を余儀なくされる。In such a case, since the inside of the cylindrical ring is exposed to the outside, an axle or an axle support bearing (such as a double row cylindrical roller bearing) existing on the inner peripheral side of the cylindrical ring due to external dust or muddy water. ), Etc. can no longer be protected, and their lifespan is reduced.
【０００６】また、熱劣化を抑制するために、素材をよ
り硬いものに換えると車軸用キャップの剛性が高くな
り、着脱が困難となる。Further, in order to suppress heat deterioration, if the material is changed to a harder one, the rigidity of the axle cap becomes high and it becomes difficult to attach and detach it.
【０００７】したがって、本発明は、円筒環に対して容
易に着脱できるようにしながら、温度上昇時において円
筒環からの脱落を回避できるようにすることを課題とし
ている。[0007] Therefore, an object of the present invention is to make it possible to easily attach / detach to / from a cylindrical ring, and to avoid dropping from the cylindrical ring when the temperature rises.
【０００８】[0008]
【課題を解決するための手段】本発明は、車軸の軸端に
設けられる円筒環にその開口を閉塞するように装着さ
れ、有底筒状に形成されているとともに、前記円筒環の
端部外周に外嵌される筒部の円筒形内周面に、前記円筒
環の端部外周面に設けられる周段部に係合する環状凸部
が設けられる車軸用キャップであって、前記キャップ
が、素材として、前記周溝に対する凸部の係合、離脱を
許容しうる程度に前記筒部の開口側が拡径する引張弾性
率を有するとともに熱劣化しにくい性質の熱可塑性ポリ
エステル系エラストマーが選定されており、前記筒部と
底部との連接部の少なくとも底部側部分が外方に膨らむ
曲面部とされている。According to the present invention, a cylindrical ring provided at the shaft end of an axle is mounted so as to close the opening, is formed in a bottomed cylindrical shape, and the end portion of the cylindrical ring is provided. An axle cap in which an annular convex portion that engages with a peripheral step portion provided on an outer peripheral surface of an end portion of the cylindrical ring is provided on a cylindrical inner peripheral surface of a cylindrical portion that is externally fitted, wherein the cap is As the material, a thermoplastic polyester-based elastomer having a tensile elastic modulus in which the opening side of the tubular portion expands to an extent that allows the engagement and disengagement of the convex portion with respect to the circumferential groove and is resistant to thermal deterioration is selected. At least the bottom side portion of the connecting portion between the cylindrical portion and the bottom portion is a curved surface portion that bulges outward.
【０００９】なお、前述の底部の中央部に、前記車軸の
軸端側への凹部を形成してもよい。また、筒部の開口端
縁の円筒形内周面の内径寸法は、円筒環の外周面の外径
寸法よりも大きく設定され、両者間に所要の隙間が設け
られるのが好ましい。It should be noted that a recess may be formed in the central portion of the bottom portion toward the shaft end side of the axle. Further, it is preferable that the inner diameter dimension of the cylindrical inner peripheral surface of the opening end edge of the tubular portion is set larger than the outer diameter dimension of the outer peripheral surface of the cylindrical ring, and a required gap is provided therebetween.
【００１０】[0010]
【作用】車軸用キャップの素材として、熱可塑性ポリエ
ステル系エラストマーの中でも熱劣化しにくい性質のも
のを選定することにより、温度上昇時における万一の脱
落を回避できるようにしながら、車軸用キャップの筒部
と底部の間に環状曲面部を形成して車軸用キャップの剛
性を小さくし、着脱を容易にすると共に、車軸用キャッ
プの破損を防止できるようにしている。[Function] By selecting, as the material for the axle cap, one of the thermoplastic polyester-based elastomers that is resistant to thermal deterioration, it is possible to prevent the cap from slipping off when the temperature rises, and at the same time, the cylinder of the axle cap can be prevented. An annular curved surface portion is formed between the bottom portion and the bottom portion to reduce the rigidity of the axle cap, facilitate the attachment / detachment, and prevent damage to the axle cap.
【００１１】また、車軸用キャップの底部中央に凹部を
設けることにより、断面係数を大きくして取付後、筒部
を拡径しにくくすることにより、車軸用キャップが円筒
環から脱落することを防止できるようにしている。Further, by providing a recess at the center of the bottom of the axle cap to increase the section modulus and make it difficult to expand the diameter of the cylinder after mounting, the axle cap is prevented from falling off the cylindrical ring. I am able to do it.
【００１２】さらに、前述のように車軸用キャップの開
口端縁と円筒環との間に径方向隙間を設ければ、そこ
を、車軸用キャップを意図的に取り外すときの取り外し
治具の係止部として利用できるようになる。Further, as described above, if a radial gap is provided between the opening end edge of the axle cap and the cylindrical ring, the detachment jig is locked when the axle cap is intentionally removed. It will be available as a department.
【００１３】[0013]
【実施例】以下、本発明の詳細を図１ないし図５に示す
実施例に基づいて説明する。図１は、本発明の車軸用キ
ャップを装着した鉄道車両の車軸周辺の一部の縦断面
図、図２は、車軸端部と車軸用キャップとの装着部位の
拡大図、図３は、車軸用キャップの装着部位の拡大図で
ある。図中、１は車軸、２は円筒環、３は複列円筒ころ
軸受などの車軸支持用軸受、４は車軸用キャップ、５は
シールである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1 is a vertical cross-sectional view of a part of an axle of a railway vehicle equipped with an axle cap of the present invention, FIG. 2 is an enlarged view of a portion where an axle end portion and an axle cap are attached, and FIG. 3 is an axle. It is an enlarged view of the attachment part of the cap for use. In the figure, 1 is an axle, 2 is a cylindrical ring, 3 is an axle supporting bearing such as a double row cylindrical roller bearing, 4 is an axle cap, and 5 is a seal.
【００１４】車軸１は、軸端に向けて複数段階に縮径し
ており、途中に車軸支持用軸受３が外嵌装着されてい
る。円筒環２は、車軸支持用軸受３の内輪３１に取り付
けられていて、車軸１の軸端外周に所要間隙を介して同
軸状に配設されている。車軸用キャップ４は、有底円筒
形に形成されており、車軸１を外部から隠蔽するよう
に、円筒環２に外嵌装着されている。シール５は、車軸
支持用軸受３の外輪３２の軸方向両端に取り付けられた
シール保持環６に取り付けられて、円筒環２の外周面と
の間に接触または非接触密封部を形成するものであり、
車軸支持用軸受３の内外を遮断するようになっている。The axle 1 is reduced in diameter toward the shaft end in a plurality of steps, and an axle support bearing 3 is externally fitted and mounted on the way. The cylindrical ring 2 is attached to the inner ring 31 of the bearing 3 for supporting the axle, and is coaxially arranged on the outer periphery of the shaft end of the axle 1 with a required gap. The axle cap 4 is formed in a bottomed cylindrical shape, and is externally fitted to the cylindrical ring 2 so as to conceal the axle 1 from the outside. The seal 5 is attached to the seal retaining rings 6 attached to both axial ends of the outer ring 32 of the bearing 3 for supporting an axle, and forms a contact or non-contact sealed portion with the outer peripheral surface of the cylindrical ring 2. Yes,
The inside and outside of the axle support bearing 3 is cut off.
【００１５】円筒環２の外周面２０の端部には、径方向
外向きの凸部２２が周方向に連続して形成されている。
また、この凸部２２の基端部と外周面２０との角には、
車軸用キャップ４が確実に外周面２０に嵌着するよう帯
状の周溝２１が設けられている。車軸用キャップ４は、
円筒環２の端部外周に外嵌される円筒部４１と、この円
筒部４１の軸方向一端側に連接されて円筒環２の開口端
を閉塞する底部４２とを有している。円筒部４１と底部
４２とは、円錐環状の連接部４６で連接され、連接部４
６と底部４２は外方に膨らんだ曲面４６ａでつながれて
いる。また、底部４２の中央部には車軸１の軸端側への
凹部４２ａが形成されている。さらに、底部４２の内側
（車軸１側）には、補強用の放射状に配設されたリブ４
ｂ、同心円状に配設されたリブ４ｃが形成されている。
この車軸用キャップ４の円筒部４１の軸方向他端側外周
面には、径方向外向きの鍔４３が、また、円筒部４１の
円筒形内周面には、周方向に連続する径方向内向きの凸
部４４が、それぞれ連接されている。この凸部４４は、
軸方向内側の端面が対向する凸部２２の軸方向端面と係
合し、車軸用キャップ４が円筒環２から軸方向外方へ抜
けることを防止している。また、凸部４４の軸方向開口
側には、車軸用キャップ４を円筒環２に取り付ける際に
径方向の位置決めを容易にするための案内部４５が形成
されている。At the end of the outer peripheral surface 20 of the cylindrical ring 2, a radially outwardly protruding portion 22 is formed continuously in the circumferential direction.
In addition, at the corner between the base end of the convex portion 22 and the outer peripheral surface 20,
A belt-shaped circumferential groove 21 is provided so that the axle cap 4 can be securely fitted to the outer peripheral surface 20. The axle cap 4 is
The cylindrical ring 2 has a cylindrical portion 41 that is fitted onto the outer periphery of the end portion of the cylindrical ring 2, and a bottom portion 42 that is connected to one axial end of the cylindrical portion 41 and closes the open end of the cylindrical ring 2. The cylindrical portion 41 and the bottom portion 42 are connected by a conical annular connecting portion 46, and the connecting portion 4
6 and the bottom portion 42 are connected by a curved surface 46a that bulges outward. Further, a concave portion 42a toward the shaft end side of the axle 1 is formed in the center of the bottom portion 42. Further, on the inner side (on the side of the axle 1) of the bottom portion 42, ribs 4 are arranged radially for reinforcement.
b, ribs 4c arranged concentrically are formed.
A radially outward flange 43 is provided on the outer peripheral surface of the cylindrical portion 41 of the axle cap 4 on the other end side in the axial direction, and a cylindrical inner peripheral surface of the cylindrical portion 41 has a radial direction continuous in the radial direction. The inward convex portions 44 are connected to each other. This convex portion 44 is
The end surface on the inner side in the axial direction is engaged with the end surface in the axial direction of the projecting portion 22 which is opposed to prevent the cap 4 for an axle from coming off from the cylindrical ring 2 outward in the axial direction. A guide portion 45 is formed on the axial opening side of the convex portion 44 for facilitating radial positioning when the axle cap 4 is attached to the cylindrical ring 2.
【００１６】そして、図２に示すように円筒部４１にお
いて上述の案内部４５と凸部４４の軸方向底部側の内周
面の内径寸法Ｒ１は、円筒環２の外周面２０の外径寸法
Ｒ２及び凸部２２の外径寸法Ｒ４よりも大きく設定され
ており、両者間に所要の隙間が設けられている。尚、凸
部２２と円筒部４１の凸部４４の軸方向底部側内周面の
間に隙間を設けたのは、取付時に車軸用キャップ４の開
口側が縮径し易くするためである。また、図３に示すよ
うに凸部４４の内周円径寸法Ｒ３は円筒環２の外径寸法
Ｒ２よりも小さく設定されている。このＲ２とＲ３との
差（Ｒ２−Ｒ３）が、円筒環２の外周面２０に対する車
軸用キャップ４の凸部４４の締め代である。この締め代
は、例えば最大外径寸法が１９０ｍｍの車軸用キャップ
４の場合、３．５ｍｍつまり１８０度対向位置の二カ所
で片側１．７５ｍｍずつに設定される。As shown in FIG. 2, the inner diameter R1 of the inner peripheral surface of the cylindrical portion 41 on the axial bottom side of the guide portion 45 and the convex portion 44 is the outer diameter of the outer peripheral surface 20 of the cylindrical ring 2. It is set to be larger than the outer diameter dimension R4 of R2 and the convex portion 22, and a required gap is provided between them. The reason why the gap is provided between the inner peripheral surface of the convex portion 22 and the convex portion 44 of the cylindrical portion 41 on the bottom side in the axial direction is that the opening side of the axle cap 4 can be easily reduced in diameter during mounting. Further, as shown in FIG. 3, the inner circumferential diameter dimension R3 of the convex portion 44 is set smaller than the outer diameter dimension R2 of the cylindrical ring 2. The difference (R2-R3) between R2 and R3 is the interference of the convex portion 44 of the axle cap 4 with respect to the outer peripheral surface 20 of the cylindrical ring 2. For example, in the case of the axle cap 4 having a maximum outer diameter of 190 mm, this tightening allowance is set to 3.5 mm, that is, 1.75 mm on each side at two 180 ° opposite positions.
【００１７】このような構成の車軸用キャップ４を円筒
環２に取り付ける際には、まず、円筒環２の凸部２２
に、車軸用キャップ４の案内部４５を係合させて車軸用
キャップ４が円筒環２に対して径方向にずれないように
した後、車軸用キャップ４に軸方向円筒環２側への力を
加え、車軸用キャップ４を円筒環２に押し付けると、車
軸用キャップ４の開口側が拡径し、車軸用キャップ４の
凸部４４が円筒環２の凸部２２を乗りこえ、車軸用キャ
ップ４自身の弾性力により、開口側が縮径し、凸部４４
が円筒環２の外周面に外嵌固定することができる。When the axle cap 4 having such a structure is attached to the cylindrical ring 2, first, the convex portion 22 of the cylindrical ring 2 is attached.
Then, the guide portion 45 of the axle cap 4 is engaged to prevent the axle cap 4 from being displaced in the radial direction with respect to the cylindrical ring 2, and then the force applied to the axial cap 4 toward the axial cylindrical ring 2 side. When the axle cap 4 is pressed against the cylindrical ring 2, the diameter of the opening side of the axle cap 4 is expanded, and the convex portion 44 of the axle cap 4 rides over the convex portion 22 of the cylindrical ring 2 and the axle cap 4 itself. Due to the elastic force of the
Can be externally fitted and fixed to the outer peripheral surface of the cylindrical ring 2.
【００１８】そして、車軸用キャップ４は、凸部２２に
対する凸部４４の係合、離脱を許容しうる程度に円筒部
４１の開口側が拡径する引張弾性率を有するとともに熱
劣化しにくい性質の熱可塑性ポリエステル系エラストマ
ーが選定されている。The axle cap 4 has a tensile elastic modulus such that the opening side of the cylindrical portion 41 expands to the extent that the engagement and disengagement of the protrusion 44 with respect to the protrusion 22 can be permitted, and the axle cap 4 is resistant to thermal deterioration. A thermoplastic polyester elastomer has been selected.
【００１９】このような熱可塑性ポリエステル系エラス
トマーの具体例としては、例えば東レ・デュポン株式会
社が開発した熱可塑性ポリエーテルエステル系エラスト
マー（ＰＥＥＥ）の商品名ハイトレルのうちの５５５７
（引張弾性率１４００ｋｇ／ｃｍ2、熱変形温度１０９
℃）および６３４７（引張弾性率２８００ｋｇ／ｃ
ｍ2、熱変形温度１３６℃）や、東洋紡績株式会社製の
商品名ペルプレンのうちのＰ−１５０Ｂ（引張弾性率３
０４０ｋｇ／ｃｍ2、熱変形温度１１７℃）の計三種類
が挙げられる。なお、前記熱変形温度とは、試験片に
４．６〔ｋｇｆ／ｃｍ2〕の荷重を加えた状態にて変形
するときの温度を言う（試験方法ＡＳＴＭ−Ｄ６４
８）。As a specific example of such a thermoplastic polyester elastomer, for example, 5557 of Hytrel, a trade name of thermoplastic polyetherester elastomer (PEEE) developed by Toray DuPont Co., Ltd.
(Tensile elastic modulus 1400 kg / cm 2 , heat distortion temperature 109
° C) and 6347 (tensile modulus 2800 kg / c
m 2 , heat distortion temperature of 136 ° C.) or P-150B (tensile elastic modulus 3 of TOYOBO CO., LTD. trade name Perprene).
040 kg / cm 2 and heat distortion temperature 117 ° C.). The heat deformation temperature is the temperature at which the test piece is deformed under a load of 4.6 [kgf / cm 2 ] (Test Method ASTM-D64).
8).
【００２０】この三種類の素材を選定した理由を説明す
る。前記三種類の素材と、本発明の対象外の二種類の素
材との計五種類の素材で上記車軸用キャップ４を製作し
て、それぞれ脱落試験をしたので、その結果を表１ない
し表３に示す。この試験は、各素材で作った車軸用キャ
ップ４を実物と同様の円筒環２に取り付け、各環境温度
において、車軸用キャップ４内の圧力を徐々に上げて行
き、車軸用キャップ４が円筒環２から脱落した時点の圧
力を測定したものである。なお、実施例１は５５５７、
実施例２は６３４７、実施例３はＰ−１５０Ｂ、比較例
１は東洋紡績株式会社製の商品名ペルプレンのうちのＰ
−７０Ｂ（引張弾性率１１００ｋｇ／ｃｍ2、熱変形温
度７４℃）、比較例２は東洋紡績株式会社製の商品名ペ
ルプレンのうちのＳ−１００２（引張弾性率１１００ｋ
ｇ／ｃｍ2、熱変形温度６８℃）である。The reason why these three types of materials are selected will be described. The above-mentioned axle caps 4 were manufactured from a total of five types of materials including the above three types of materials and two types of materials that are not the subject of the present invention, and a drop test was conducted on each of them, and the results are shown in Tables 1 to 3. Shown in. In this test, the axle cap 4 made of each material was attached to the same cylindrical ring 2 as the real thing, and the pressure inside the axle cap 4 was gradually increased at each environmental temperature, and the axle cap 4 was The pressure at the time of dropping from 2 is measured. Note that the first embodiment is 5557,
Example 2 is 6347, Example 3 is P-150B, and Comparative Example 1 is P of trade name Perprene manufactured by Toyobo Co., Ltd.
-70B (tensile elastic modulus 1100 kg / cm 2 , heat distortion temperature 74 ° C.), Comparative Example 2 is S-1002 (tensile elastic modulus 1100 k of TOYOBO CO., LTD. Trade name Perprene).
g / cm 2 , heat distortion temperature 68 ° C.).
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】[0023]
【表３】 [Table 3]
【００２４】これらの表から明らかなように、実施例１
〜３のものが比較例１、２のものよりも低温域から高温
域にわたって脱落しにくくなっている。As is apparent from these tables, Example 1
3 to 3 are less likely to fall off from the low temperature region to the high temperature region than those of Comparative Examples 1 and 2.
【００２５】このことから、車軸用キャップ４の素材と
する熱可塑性ポリエステル系エラストマーとしては、前
記具体的な三種類の素材の引張弾性率および熱変形温度
の数値に若干の余裕を持たせて、引張弾性率が１３００
〜４０００〔ｋｇ／ｃｍ2〕に、４．６〔ｋｇｆ／ｃ
ｍ2〕の荷重を加えた状態での熱変形温度が１００
〔℃〕以上にそれぞれ設定されたものであればよいと言
える。したがって、本発明の車軸用キャップ４の素材と
しては前述の具体的な三種類のみに限定されない。From the above, as the thermoplastic polyester elastomer used as the material of the axle cap 4, the tensile elastic modulus and the heat deformation temperature of the above-mentioned concrete three kinds of materials have some allowances, Tensile modulus is 1300
To 4000 [kg / cm 2 ] and 4.6 [kgf / c]
m 2 ], the heat distortion temperature is 100 when the load is applied.
It can be said that those set above [° C.] are enough. Therefore, the material of the axle cap 4 of the present invention is not limited to the above-mentioned three specific types.
【００２６】ところで、前記引張弾性率の特定範囲の上
限側の素材では車軸用キャップ４の取り外しが行いにく
くなると言えるが、本実施例の車軸用キャップ４は、上
述したように、円筒部４１と底部４２を円錐環状の連接
部４６でつなぐとともに、連接部４６と底部４２とを曲
面部４６ａで連接しているので、従来の車軸用キャップ
のように円筒部と底部を円錐部で連接した場合に比べて
剛性が低くなり、図１の矢印Ｘ方向に曲げて取り外す場
合にも、容易に取り外すことができる。また、従来技術
の車軸用キャップのように円筒部と底部が直線で構成さ
れていると、取り外し時に曲げられると角部に応力が集
中し、この部分から破損するおそれがあるが、本実施例
のように曲線で構成されていると、応力が集中せず破損
を防止できる。また、底部４２の中央部に凹部４２ａを
形成することにより、車軸用キャップの断面係数を大き
くすることができるので、円筒環に取付後の円筒部４１
の拡径を抑制して、凸部４４が凸部２２から外れて円筒
環から車軸用キャップが脱落することを防止できる。By the way, although it can be said that it is difficult to remove the axle cap 4 with the material on the upper limit side of the specific range of the tensile elastic modulus, the axle cap 4 of the present embodiment has the cylindrical portion 41 as described above. Since the bottom portion 42 is connected by the conical annular connecting portion 46 and the connecting portion 46 and the bottom portion 42 are connected by the curved surface portion 46a, when the cylindrical portion and the bottom portion are connected by the conical portion like the conventional axle cap. The rigidity is lower than that of, and it can be easily removed even when it is bent and removed in the direction of the arrow X in FIG. Further, if the cylindrical portion and the bottom portion are formed by straight lines like the axle cap of the prior art, stress may concentrate on the corner portion when bent at the time of removal, and there is a risk of damage from this portion. If it is composed of a curved line, the stress is not concentrated and damage can be prevented. Further, by forming the recess 42a in the central portion of the bottom portion 42, it is possible to increase the sectional modulus of the axle cap, and thus the cylindrical portion 41 after being attached to the cylindrical ring.
It is possible to prevent the protrusion 44 from coming off the protrusion 22 and the axle cap from falling off the cylindrical ring.
【００２７】車軸用キャップ４を取り外すにあたって、
図４および図５に示すような取り外し治具７を用いれ
ば、取り外しをより容易に行える。図４は、取り外し治
具の正面図、図５は、取り外し治具の縦断面図である。
図例の取り外し治具７は、扇形のフレーム７１とＴ字形
の操作棒７２とからなる。フレーム７１の一端辺には、
前後に対向する二つ一対の側壁７３、７４が設けられて
おり、外側の側壁７４の下端には、ほぼ９０度屈曲する
係止片７５が設けられている。この取り外し治具７の使
用方法を説明する。つまり、取り外し治具７の操作棒７
２を上にして、フレーム７１の一対の側壁７３、７４を
図１の空間Ｘに入れてから、取り外し治具７の一対の側
壁７３、７４の間の離間隙間に車軸用キャップ４の径方
向外向きの鍔４３を差し込むとともに、車軸用キャップ
４の円筒部４１の開口端縁内周面と円筒環２の外周面と
の間に存在する径方向隙間に、取り外し治具７の係止片
７５を差し込む。この状態にて、取り外し治具７の操作
棒７２を図５の矢印Ｙ方向に引く。これにより、梃子の
原理で車軸用キャップ４の円筒部４１が所要量拡径させ
られながら、この円筒部４１の凸部４４が円筒環２の凸
部２２を乗り越えて、車軸用キャップ４の全体が円筒環
２から外れる。このように取り外し治具７を用いれば車
軸用キャップ４の取り外しがさらに容易となる。When removing the axle cap 4,
If the removal jig 7 as shown in FIGS. 4 and 5 is used, the removal can be performed more easily. FIG. 4 is a front view of the removal jig, and FIG. 5 is a vertical sectional view of the removal jig.
The removal jig 7 in the illustrated example includes a fan-shaped frame 71 and a T-shaped operation rod 72. On one side of the frame 71,
Two pairs of side walls 73, 74 facing each other in the front-rear direction are provided, and a locking piece 75 that bends by approximately 90 degrees is provided at the lower end of the outer side wall 74. A method of using the removing jig 7 will be described. That is, the operating rod 7 of the removal jig 7
2, the pair of side walls 73 and 74 of the frame 71 are put in the space X in FIG. 1, and then the gap between the pair of side walls 73 and 74 of the removing jig 7 is set in the radial direction of the axle cap 4. While the outward facing flange 43 is inserted, the locking piece of the removal jig 7 is placed in the radial gap existing between the inner peripheral surface of the opening end edge of the cylindrical portion 41 of the axle cap 4 and the outer peripheral surface of the cylindrical ring 2. Insert 75. In this state, the operating rod 72 of the removal jig 7 is pulled in the direction of arrow Y in FIG. As a result, while the cylindrical portion 41 of the axle cap 4 is expanded by a required amount on the principle of leverage, the convex portion 44 of the cylindrical portion 41 rides over the convex portion 22 of the cylindrical ring 2 and the entire axle cap 4 is Separates from the cylindrical ring 2. By using the removal jig 7 as described above, the removal of the axle cap 4 becomes easier.
【００２８】尚、上記実施例では、車軸用キャップの連
接部４６と底部４２のみを曲面部４６ａでつなげるよう
にしたが、連接部４６全体を外方に膨らむ曲面で構成し
てもよい。In the above embodiment, only the connecting portion 46 and the bottom portion 42 of the axle cap are connected by the curved surface portion 46a. However, the entire connecting portion 46 may be curved outwardly.
【００２９】[0029]
【発明の効果】本発明の車軸用キャップは、特定の性質
を有する熱可塑性ポリエステル系エラストマー素材で形
成しているから、温度上昇時における万一の脱落を回避
できるようになる。しかも、有底円筒状に形成され、筒
部と底部との連接部の少なくとも底部側部分を外方に膨
らむ曲面部としているので、車軸用キャップの剛性が低
くなり、引張弾性率の高い素材を用いても、着脱が容易
に行える。さらに、底部中央に凹部を設け、車軸用キャ
ップの断面係数を高めたので、キャップ取付後は、筒部
が拡がりにくくなり、車軸用キャップが円筒環から脱落
しにくくすることができる。Since the axle cap of the present invention is made of the thermoplastic polyester elastomer material having specific properties, it can be prevented from falling off when the temperature rises. Moreover, since it is formed in a cylindrical shape with a bottom, and at least the bottom side portion of the connecting portion between the tubular portion and the bottom portion is a curved surface portion that bulges outward, the rigidity of the axle cap becomes low and a material with a high tensile elastic modulus is used. Even if it is used, it can be easily attached and detached. Furthermore, since the recess is provided in the center of the bottom to increase the section modulus of the axle cap, the tubular portion is less likely to spread after the cap is attached, and the axle cap can be prevented from falling off the cylindrical ring.
【００３０】したがって、円筒環の内部に存在する車軸
や車軸支持用軸受（複列円筒ころ軸受など）などを、外
部の砂ぼこりや泥水などから確実に保護できるようにな
り、それらの所期の寿命を安定的に達成させることがで
きるようになる。しかも、車軸の検査時などには、車軸
用キャップを容易に取り外すことができ、検査の時間を
短縮することができる。Therefore, it becomes possible to surely protect the axles and the bearings for supporting the axles (double-row cylindrical roller bearings, etc.) present inside the cylindrical ring from external dust and muddy water, and their intended life. Can be achieved in a stable manner. Moreover, at the time of inspecting the axle, the axle cap can be easily removed, and the inspection time can be shortened.
【図１】本発明の車軸用キャップを装着した鉄道車両の
車軸周辺の一部の縦断面図。FIG. 1 is a vertical cross-sectional view of a portion around an axle of a railway vehicle equipped with an axle cap of the present invention.
【図２】車軸端部と車軸用キャップとの装着部位の拡大
図。FIG. 2 is an enlarged view of a mounting portion of an axle end portion and an axle cap.
【図３】車軸用キャップの装着部位の拡大図。FIG. 3 is an enlarged view of a mounting portion of an axle cap.
【図４】取り外し治具の正面図。FIG. 4 is a front view of a removal jig.
【図５】取り外し治具の縦断面図。FIG. 5 is a vertical sectional view of a removal jig.
【図６】従来技術による車軸端部と車軸用キャップとの
装着部位の拡大図。FIG. 6 is an enlarged view of a mounting portion of an axle end portion and an axle cap according to a conventional technique.
１ 車軸 ２ 円筒環 ２２ 円筒環の凸部 ３ 車軸支持用軸受 ４ 車軸用キャップ ４１ 車軸用キャップの円筒部 ４２ 車軸用キャップの底部 ４２ａ 凹部 ４４ 車軸用キャップの凸部 DESCRIPTION OF SYMBOLS 1 Axle 2 Cylindrical ring 22 Convex part of cylindrical ring 3 Axle support bearing 4 Axle cap 41 Cylindrical part of axle cap 42 Bottom part of axle cap 42a Recess 44 Convex part of axle cap
Claims (3)
口を閉塞するように装着され、有底筒状に形成されてい
るとともに、前記円筒環の端部外周に外嵌される筒部の
円筒形内周面に、前記円筒環の端部外周面に設けられる
周段部に係合する環状凸部が設けられる車軸用キャップ
であって、 前記キャップが、素材として、前記周溝に対する凸部の
係合、離脱を許容しうる程度に前記筒部の開口側が拡径
する引張弾性率を有するとともに熱劣化しにくい性質の
熱可塑性ポリエステル系エラストマーが選定されてお
り、前記筒部と底部との連接部の少なくとも底部側部分
を外方に膨らむ曲面部とした、ことを特徴とする車軸用
キャップ。1. A cylindrical portion, which is attached to a cylindrical ring provided at the shaft end of an axle so as to close the opening thereof, has a bottomed cylindrical shape, and is fitted onto the outer periphery of the end portion of the cylindrical ring. Is a cap for an axle provided with an annular convex portion that engages with a peripheral step portion provided on an outer peripheral surface of an end portion of the cylindrical ring, wherein the cap is a material with respect to the peripheral groove. A thermoplastic polyester-based elastomer having a tensile elastic modulus in which the opening side of the cylindrical portion expands to an extent that allows engagement and disengagement of the convex portion and is resistant to thermal deterioration is selected, and the cylindrical portion and the bottom portion are selected. An axle cap characterized in that at least a bottom side portion of a connecting portion with is a curved surface portion that bulges outward.
への凹部が形成されている、ことを特徴とする請求項１
の車軸用キャップ。2. The recessed portion toward the shaft end side of the axle is formed in the central portion of the bottom portion.
Axle cap.
径寸法が円筒環の外周面の外径寸法よりも大きく設定さ
れ、両者間に所要の隙間が設けられている、ことを特徴
とする請求項１または２の車軸用キャップ。3. The inner diameter of the cylindrical inner peripheral surface of the opening edge of the cylindrical portion is set larger than the outer diameter of the outer peripheral surface of the cylindrical ring, and a required gap is provided between the both. The axle cap according to claim 1 or 2, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17272394A JP3698744B2 (en) | 1994-07-25 | 1994-07-25 | Axle cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17272394A JP3698744B2 (en) | 1994-07-25 | 1994-07-25 | Axle cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0835523A true JPH0835523A (en) | 1996-02-06 |
| JP3698744B2 JP3698744B2 (en) | 2005-09-21 |
Family
ID=15947141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17272394A Expired - Fee Related JP3698744B2 (en) | 1994-07-25 | 1994-07-25 | Axle cap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3698744B2 (en) |
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| US6896947B2 (en) | 1998-06-22 | 2005-05-24 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US6905750B2 (en) | 1998-06-22 | 2005-06-14 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US6007889A (en) * | 1998-06-22 | 1999-12-28 | Target Technology, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US6280811B1 (en) | 1998-06-22 | 2001-08-28 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US7314659B2 (en) | 2000-07-21 | 2008-01-01 | Target Technology Company, Llc | Metal alloys for the reflective or semi-reflective layer of an optical storage medium |
| US7314660B2 (en) | 2000-07-21 | 2008-01-01 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US7314657B2 (en) | 2000-07-21 | 2008-01-01 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US7316837B2 (en) | 2000-07-21 | 2008-01-08 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US7374805B2 (en) | 2000-07-21 | 2008-05-20 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US6544616B2 (en) | 2000-07-21 | 2003-04-08 | Target Technology Company, Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| US7018696B2 (en) | 2003-04-18 | 2006-03-28 | Target Technology Company Llc | Metal alloys for the reflective or the semi-reflective layer of an optical storage medium |
| JP2010180955A (en) * | 2009-02-05 | 2010-08-19 | Jtekt Corp | Sealing structure and bearing device |
| JP2010180956A (en) * | 2009-02-05 | 2010-08-19 | Jtekt Corp | Sealing structure and bearing device |
| JP2013024324A (en) * | 2011-07-20 | 2013-02-04 | Neturen Co Ltd | Method of manufacturing composite member and the composite member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3698744B2 (en) | 2005-09-21 |
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