JP3508463B2 - Sintered oil-impregnated bearing - Google Patents
Sintered oil-impregnated bearingInfo
- Publication number
- JP3508463B2 JP3508463B2 JP11488597A JP11488597A JP3508463B2 JP 3508463 B2 JP3508463 B2 JP 3508463B2 JP 11488597 A JP11488597 A JP 11488597A JP 11488597 A JP11488597 A JP 11488597A JP 3508463 B2 JP3508463 B2 JP 3508463B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- impregnated
- oil
- expanded diameter
- groove
- 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
- Sliding-Contact Bearings (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、軸受部材（多孔質
部材）に潤滑油を含浸させて、軸受孔に挿通される回転
軸との潤滑を好適に行うことができる焼結含油軸受に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered oil-impregnated bearing in which a bearing member (porous member) is impregnated with lubricating oil, and lubrication with a rotating shaft inserted in a bearing hole can be suitably performed.
【０００２】[0002]
【従来の技術】多孔質状の焼結合金により形成され、潤
滑油を含浸させて使用される焼結含油軸受は、無給油で
長時間使用できることから、各種機器の回転軸の軸受と
して広く用いられている。2. Description of the Related Art Sintered oil-impregnated bearings, which are made of a porous sintered alloy and impregnated with lubricating oil, can be used for a long time without lubrication and are therefore widely used as bearings for rotary shafts of various equipment. Has been.
【０００３】この種の焼結含油軸受は、多孔質状の焼結
合金により形成された軸受本体に軸受孔が設けられたも
のであり、この軸受孔に、軸受孔より小径の回転軸が挿
通されて用いられる。そして、この焼結含油軸受は、回
転軸の回転に伴うポンプ作用によって軸受本体の多数の
細かい空孔（含油孔）より吸い出された潤滑油と、摩擦
熱に起因する膨張によって滲出した潤滑油とが、回転軸
との摺動部分において油膜を形成するため、この油膜に
より回転軸を焼き付け等の支障なく支持できるように構
成されている。This type of sintered oil-impregnated bearing has a bearing main body made of a porous sintered alloy and is provided with a bearing hole. A rotary shaft having a diameter smaller than that of the bearing hole is inserted into the bearing hole. Is used. This sintered oil-impregnated bearing has a lubricating oil sucked out from a large number of fine holes (oil-impregnated holes) in the bearing body by the pump action accompanying the rotation of the rotating shaft and a lubricating oil exuded by expansion caused by friction heat. Since an oil film is formed in the sliding portion with respect to the rotating shaft, the rotating shaft can be supported by this oil film without trouble such as burning.
【０００４】ところで、この焼結含油軸受には、図５に
示すように、スピンドルモータなどの回転軸１０１を上
下２カ所で軸受けするタイプの焼結含油軸受１０２があ
る。この焼結含油軸受１０２は、筒状部材１０３の中
に、多孔質状の焼結合金により環状に形成された２個の
軸受部材１０４、１０４ａを、離間する２カ所に嵌め込
んで固定し、これら軸受部材１０４、１０４ａの２カ所
の内周面で回転軸１０１を軸受けするものである。By the way, this sintered oil-impregnated bearing includes, as shown in FIG. 5, a sintered oil-impregnated bearing 102 of a type in which a rotary shaft 101 such as a spindle motor is supported at two upper and lower positions. In this sintered oil-impregnated bearing 102, two bearing members 104 and 104a, which are annularly formed of a porous sintered alloy, are fitted and fixed in a tubular member 103 at two spaced positions. The rotary shaft 101 is borne by the inner peripheral surfaces of these bearing members 104, 104a at two locations.
【０００５】ただし、このような上下２カ所で回転軸１
０１を軸受けするタイプでは、この回転軸１０１の下方
が駆動側、上方が負荷側である場合、上方に位置する軸
受部材１０４と回転軸１０１との間において潤滑油の消
費量が多くなってしまう。従って、上方の軸受部材１０
４に対して下方の軸受部材１０４ａから適宜潤滑油を供
給できれば、軸受部材１０４における早期の油切れを回
避でき、潤滑作用の永続性を確保できるものとなり好ま
しい。However, the rotary shaft 1 is provided at such two upper and lower positions.
In the type of bearing 01, when the lower side of the rotary shaft 101 is the drive side and the upper side is the load side, the amount of lubricating oil consumed increases between the bearing member 104 and the rotary shaft 101 located above. . Therefore, the upper bearing member 10
It is preferable that the lubricating oil can be appropriately supplied from the lower bearing member 104a to the bearing 4, so that the bearing member 104 can be prevented from running out of oil early and the durability of the lubricating action can be secured.
【０００６】そのため、従来では、図６に示すような焼
結含油軸受１０５が提案されている。この焼結含油軸受
１０５は、いわゆるツインメタルと呼ばれるものであ
り、回転軸１０１に対する摺動部１０７、１０７ａが軸
受本体１０６の離間した２カ所に形成されるように、多
孔質状の焼結合金により一体成形されたものである。こ
れにより、上方の摺動部１０７で潤滑油が減少した場合
には、下方の摺動部１０７ａ付近に含浸されている潤滑
油が軸受本体１０６内における毛細管現象によって上方
に移動し、上方の摺動部１０７に適宜潤滑油が供給され
ることになる。Therefore, conventionally, a sintered oil-impregnated bearing 105 as shown in FIG. 6 has been proposed. The sintered oil-impregnated bearing 105 is a so-called twin metal, and is a porous sintered alloy so that the sliding portions 107 and 107a with respect to the rotating shaft 101 are formed at two positions separated from each other in the bearing body 106. It is integrally molded by. As a result, when the lubricating oil is reduced in the upper sliding portion 107, the lubricating oil impregnated in the vicinity of the lower sliding portion 107a moves upward due to the capillary phenomenon in the bearing body 106, and the upper sliding portion 107a moves. The lubricating oil is appropriately supplied to the moving portion 107.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、図６に
示す焼結含油軸受１０５では、摺動部１０７、１０７ａ
のそれぞれと回転軸１０１の外周面との間に潤滑用の油
膜が形成され、かつ摺動部１０７、１０７ａが軸受本体
１０６と一体成形されていることから、これら摺動部１
０７、１０７ａで挟まれた空間は閉塞された状態となっ
ている。従って、この空間内の空気が回転軸１０１の回
転に伴う熱によって膨張すると、摺動部１０７、１０７
ａと回転軸１０１との隙間から排出され、この空気とと
もに油膜も外側に押し出されることから、摺動部１０７
表面等での油量を減少させてしまい、十分な潤滑効果を
得ることができないといった問題点を有している。However, in the sintered oil-impregnated bearing 105 shown in FIG. 6, the sliding portions 107, 107a are formed.
Since an oil film for lubrication is formed between each of them and the outer peripheral surface of the rotary shaft 101, and the sliding portions 107 and 107a are integrally formed with the bearing body 106, these sliding portions 1
The space sandwiched by 07 and 107a is in a closed state. Therefore, when the air in this space expands due to the heat accompanying the rotation of the rotating shaft 101, the sliding portions 107, 107
Since the oil film is discharged from the gap between “a” and the rotary shaft 101 and the oil film is also pushed outward together with this air, the sliding portion 107
There is a problem in that the amount of oil on the surface or the like is reduced and a sufficient lubricating effect cannot be obtained.
【０００８】本発明は、このような事情に鑑みてなされ
たもので、回転軸を複数箇所で軸受けする場合におい
て、一の軸受部材で減少する油量を他の軸受部材から適
宜供給できることは勿論、軸受部材間に挟まれた空間の
空気を確実に外部に放出できるようにして潤滑作用の永
続性を確保できるようにした焼結含油軸受を提供するこ
とを目的とする。The present invention has been made in view of the above circumstances, and in the case of bearing a rotary shaft at a plurality of locations, it goes without saying that the amount of oil reduced by one bearing member can be appropriately supplied from another bearing member. An object of the present invention is to provide a sintered oil-impregnated bearing capable of reliably discharging the air in the space sandwiched between the bearing members to the outside and ensuring the durability of the lubricating action.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決して、か
かる目的を達成するために、請求項１に係る焼結含油軸
受は、多孔質状の焼結合金により形成され、かつ回転軸
を挿通させる軸受孔が設けられた軸受部材が、筒状部材
の中に少なくとも２個嵌め込まれて互いの軸受孔を離間
させた状態で固定されてなる焼結含油軸受であって、前
記軸受部材の中、少なくとも一つは、前記軸受孔より内
径が拡げられかつ前記筒状部材の長手方向に延びる拡径
部が設けられるとともに、この拡径部の端部を他の軸受
部材に当接させるようにして設置され、前記軸受部材同
士の当接部分、及び当該軸受部材外周面と筒状部材内周
面との間にわたって、前記拡径部の内側空間と外部とを
連通させる通路部が設けられることを特徴とする。In order to solve the above problems and to achieve the above object, a sintered oil-impregnated bearing according to claim 1 is formed of a porous sintered alloy and has a rotating shaft. A sintered oil-impregnated bearing in which at least two bearing members each having a bearing hole to be inserted are fitted in a tubular member and fixed in a state where the bearing holes are separated from each other. At least one of them has an enlarged diameter portion whose inner diameter is expanded from the bearing hole and extends in the longitudinal direction of the tubular member, and the end portion of the enlarged diameter portion is brought into contact with another bearing member. And a passage portion that communicates the inner space of the expanded diameter portion with the outside is provided between the abutting portions of the bearing members and the outer peripheral surface of the bearing member and the inner peripheral surface of the tubular member. It is characterized by
【００１０】請求項２に係る焼結含油軸受は、前記筒状
部材に固定される２個の前記軸受部材のそれぞれに前記
拡径部が設けられ、かつ互いの当該拡径部の端部同士を
当接させるようにしたことを特徴とする。請求項３に係
る焼結含油軸受は、前記通路部は、前記拡径部の当接面
に設けられた第１溝部と、これに続くように前記軸受部
材の外周面に設けられた第２溝部とで構成されることを
特徴とする。請求項４に係る焼結含油軸受は、前記第１
溝部の端部と第２溝部の端部とをずらして設定するとと
もに、両者間を、前記拡径部の端部外周に設けられたテ
ーパ部で接続するようにしたことを特徴とする。In a sintered oil-impregnated bearing according to a second aspect of the present invention, the expanded diameter portion is provided in each of the two bearing members fixed to the tubular member, and the end portions of the expanded diameter portion are mutually adjacent. It is characterized in that they are brought into contact with each other. In the sintered oil-impregnated bearing according to claim 3, the passage portion has a first groove portion provided on the contact surface of the expanded diameter portion, and a second groove provided on the outer peripheral surface of the bearing member following the first groove portion. And a groove portion. The sintered oil-impregnated bearing according to claim 4 is the first
It is characterized in that the end of the groove and the end of the second groove are offset from each other, and the two are connected by a taper provided on the outer circumference of the end of the enlarged diameter portion.
【００１１】このように、請求項１に係る焼結含油軸受
は、少なくとも一の軸受部材に設けられた拡径部が他の
軸受部材に当接しているため、一の軸受部材で含浸して
いる油量が減少しても、当接部分を介した毛細管現象に
より他の軸受部材から潤滑油を供給することが可能とな
っている。従って、油量の減少が激しい軸受部材に潤滑
油を供給できるため、潤滑作用の永続性を確保すること
が可能となる。さらに、通路部によって拡径部の内側空
間と外部とが連通されているため、この内側空間内部の
空気が膨張しても通路部から適宜外部に排出され、軸受
孔と回転軸との間に形成されている油膜を空気が押し出
してしまうことがなく、安定した潤滑状態を維持できる
ようにしている。As described above, in the sintered oil-impregnated bearing according to the first aspect, since the expanded diameter portion provided on at least one bearing member is in contact with another bearing member, it is impregnated with one bearing member. Even if the amount of oil present decreases, it is possible to supply the lubricating oil from another bearing member due to the capillary phenomenon via the contact portion. Therefore, since it is possible to supply the lubricating oil to the bearing member in which the amount of oil is drastically reduced, it is possible to ensure the durability of the lubricating action. Furthermore, since the inner space of the expanded diameter portion communicates with the outside by the passage portion, even if the air inside the inner space expands, it is appropriately discharged from the passage portion to the outside between the bearing hole and the rotating shaft. Air does not push out the formed oil film, and a stable lubrication state can be maintained.
【００１２】請求項２に係る焼結含油軸受は、２個の軸
受部材のそれぞれに拡径部を設け、かつ互いの拡径部の
端部同士を当接させるため、それぞれの軸受部材として
同一形状のものを用いることができ、軸受部材の製造コ
ストを低減させることが可能となる。さらに、拡径部内
側空間は、上下略中央部分に通路部の開口部分が位置す
るため、この内側空間の空気を効率よく外部に排出する
ことが可能となる。請求項３に係る焼結含油軸受は、通
路部として、拡径部の当接面に設けられた第１溝部と、
これに続くように軸受部材の外周面に設けられた第２溝
部とで構成されるため、拡径部の内側空間と外部とを確
実に連通しつつも、筒状部材に何ら加工する必要がな
く、製造コストの低減を図ることが可能となる。請求項
４に係る焼結含油軸受は、拡径部の端部を他の軸受部材
に当接させた際、テーパ部によって筒状部材内に環状の
通路が確保されており、この通路を用いることによって
第１溝部の端部と第２溝部の端部とをずらして設けてい
るため、第２溝部の数が第１溝部より多い場合でも空気
の流れが各第２溝部に適宜分配され、この通路部を通過
する空気を効率良く外部に排出させることが可能とな
る。In the sintered oil-impregnated bearing according to a second aspect of the present invention, the two expanded diameter portions are provided in the respective bearing members, and the ends of the expanded diameter portions are brought into contact with each other. A shaped product can be used, and the manufacturing cost of the bearing member can be reduced. Further, since the opening portion of the passage portion is located in the upper and lower substantially central portions of the inner space of the expanded diameter portion, the air in this inner space can be efficiently discharged to the outside. The sintered oil-impregnated bearing according to claim 3 includes, as a passage portion, a first groove portion provided on the contact surface of the expanded diameter portion,
Since it is constituted by the second groove portion provided on the outer peripheral surface of the bearing member so as to follow this, it is necessary to process the tubular member at all while surely communicating the inner space of the expanded diameter portion and the outside. Therefore, it is possible to reduce the manufacturing cost. In the sintered oil-impregnated bearing according to claim 4, when the end of the expanded diameter portion is brought into contact with another bearing member, an annular passage is secured in the tubular member by the tapered portion, and this passage is used. Since the end portions of the first groove portions and the end portions of the second groove portions are provided by being shifted from each other, the air flow is appropriately distributed to each second groove portion even when the number of the second groove portions is larger than that of the first groove portions. The air passing through this passage can be efficiently discharged to the outside.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図１
〜図４を参照して説明する。図１は、本発明に係る焼結
含油軸受の実施の形態を示すものであり、符号１は矢印
方向に回転する回転軸、符号２は焼結含油軸受をそれぞ
れ示している。この焼結含油軸受２は、真鍮製の筒状部
材３の中に、２個の軸受部材４、１０が嵌め込まれてそ
れぞれ固定されることにより構成されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
~ It demonstrates with reference to FIG. FIG. 1 shows an embodiment of a sintered oil-impregnated bearing according to the present invention. Reference numeral 1 denotes a rotary shaft that rotates in the arrow direction, and reference numeral 2 denotes a sintered oil-impregnated bearing. The sintered oil-impregnated bearing 2 is configured by fitting two bearing members 4 and 10 into a tubular member 3 made of brass and fixing the bearing members 4 and 10, respectively.
【００１４】軸受部材４、１０は、多孔質状の焼結合金
により形成され、かつ回転軸１が挿通される軸受孔５、
１１がそれぞれ形成された筒状の一体成形型品である。
従って、軸受部材４、１０内には多数の空孔を有してお
り、軸受孔５、１１の内周面においても空孔が開口した
状態となっている。そして、軸受部材４、１０内の空孔
には潤滑油が保持され、回転軸１と摺接する軸受孔５、
１１それぞれの周面からこの潤滑油を適宜取り出して、
回転軸１と軸受孔５、１１との間に油膜を形成させるよ
うにしている。The bearing members 4 and 10 are formed of a porous sintered alloy, and the bearing hole 5 into which the rotary shaft 1 is inserted,
Reference numeral 11 is a cylindrical integrally-molded product in which each is formed.
Therefore, the bearing members 4 and 10 have a large number of holes, and the holes are also open on the inner peripheral surfaces of the bearing holes 5 and 11. Lubricating oil is held in the holes in the bearing members 4 and 10, and the bearing holes 5 are in sliding contact with the rotating shaft 1,
11 Take out this lubricating oil from each peripheral surface,
An oil film is formed between the rotary shaft 1 and the bearing holes 5 and 11.
【００１５】また、軸受部材４は、図１に示すように、
軸受孔５より内径を拡大し、かつ筒状部材３の長手方向
に延びる拡径部６が設けられている。この拡径部６は、
多孔質状の焼結合金により軸受部材４と一体成形されて
おり、その空孔には潤滑油を保持しつつ、軸受孔５の周
面まで毛細管現象により適宜潤滑油を送ることができる
ものである。なお、拡径部６の内径が軸受孔５の内径よ
り大きいため、拡径部６内周面が回転軸１と摺動するこ
とはなく、回転軸１外周面との間に空隙が生じた状態と
なっている。The bearing member 4 is, as shown in FIG.
An enlarged diameter portion 6 is provided which has an inner diameter larger than that of the bearing hole 5 and extends in the longitudinal direction of the tubular member 3. This expanded portion 6 is
It is formed integrally with the bearing member 4 by a porous sintered alloy, and while holding the lubricating oil in its pores, the lubricating oil can be appropriately sent to the peripheral surface of the bearing hole 5 by the capillary phenomenon. is there. Since the inner diameter of the enlarged diameter portion 6 is larger than the inner diameter of the bearing hole 5, the inner peripheral surface of the enlarged diameter portion 6 does not slide on the rotating shaft 1 and a gap is formed between the inner peripheral surface of the enlarged diameter portion 6 and the outer peripheral surface of the rotating shaft 1. It is in a state.
【００１６】さらに、図２（ａ）、（ｂ）に示すよう
に、軸受部材４は、拡径部６の先端面外周にテーパ部
（通路部）７が形成されるとともに、この拡径部６の先
端面には、軸線を挟んだ対象位置に放射方向の二つの第
１溝部（通路部）８が設けられ、これら第１溝部８とテ
ーパ部７とを接続させるようにしている。また、拡径部
６外周面には、周方向を略等分する四箇所に軸線方向の
第２溝部（通路部）９が設けられ、これら第２溝部９と
テーパ部７とを接続させるようにしている。なお、第１
溝部８と第２溝部９との位置関係は、図２（ａ）のよう
に、両者がずれた状態となるように設定されている。Further, as shown in FIGS. 2A and 2B, in the bearing member 4, a tapered portion (passage portion) 7 is formed on the outer periphery of the tip end surface of the expanded diameter portion 6, and the expanded diameter portion is formed. The first end surface of 6 is provided with two first groove portions (passage portions) 8 in the radial direction at target positions across the axis, and these first groove portions 8 and the taper portion 7 are connected to each other. Further, on the outer peripheral surface of the expanded diameter portion 6, second groove portions (passage portions) 9 in the axial direction are provided at four locations that divide the circumferential direction into substantially equal parts, and these second groove portions 9 and the taper portion 7 are connected to each other. I have to. The first
The positional relationship between the groove portion 8 and the second groove portion 9 is set such that the two are displaced as shown in FIG.
【００１７】軸受部材１０は、軸受部材４と同一部材が
用いられている。従って、拡径部１２や、テーパ部１
３、第１溝部１４、第２溝部１５の形態は、それぞれ軸
受部材６の拡径部６、テーパ部７、第１溝部８、第２溝
部９の形態と同一であり、空孔に潤滑油を保持する点も
勿論同様である。また、第１溝部１４と第２溝部１５と
の位置関係も、図２（ａ）に示す軸受部材４と同様に、
両者がずれた状態となるように設定されている。As the bearing member 10, the same member as the bearing member 4 is used. Therefore, the expanded diameter portion 12 and the tapered portion 1
3, the first groove portion 14 and the second groove portion 15 have the same configurations as the enlarged diameter portion 6, the taper portion 7, the first groove portion 8 and the second groove portion 9 of the bearing member 6, respectively, and the holes are filled with lubricating oil. Of course, the same holds. Further, the positional relationship between the first groove portion 14 and the second groove portion 15 is the same as that of the bearing member 4 shown in FIG.
The two are set so as to be out of alignment.
【００１８】これら軸受部材４、１０の製造方法を説明
すると、数種類の金属等の粉末を混合して調整したもの
を原料粉末とし、この原料粉末を所定の金型で加圧成形
した圧粉体をさらに焼結して焼結体を得、この焼結体に
所定のサイジングを施す、といった手順で作製される。
なお、拡径部６、１２の先端面、及びこれとは反対側の
端面は、それぞれバニシングが施される。A method of manufacturing the bearing members 4 and 10 will be described. A raw material powder is prepared by mixing powders of several kinds of metals and the like, and the raw material powder is pressed and molded in a predetermined die. Is further sintered to obtain a sintered body, and the sintered body is subjected to predetermined sizing.
In addition, burnishing is applied to the tip surfaces of the expanded diameter portions 6 and 12 and the end surfaces on the opposite side.
【００１９】続いて、これら軸受部材４、１０は、図１
に示すように、筒状部材３の中で、互いの拡径部６、１
２の先端面を当接（密着）させた状態で固定されてい
る。これにより、軸受孔５、１１を互いに離間させつつ
も、軸受部材４と１０とは、毛細管現象によって接続さ
れた状態となり、含浸されている潤滑油を他方の軸受部
材へ送ることができるようにしている。なお、軸受孔
５、１１同士の離間長さは、拡径部６、１２の長さに対
応させて任意に設定できる。Subsequently, these bearing members 4 and 10 are shown in FIG.
As shown in FIG.
It is fixed in a state in which the tip end surface of 2 is brought into contact (close contact). As a result, while the bearing holes 5 and 11 are separated from each other, the bearing members 4 and 10 are in a state of being connected to each other by a capillary phenomenon so that the impregnated lubricating oil can be sent to the other bearing member. ing. The distance between the bearing holes 5 and 11 can be arbitrarily set according to the length of the expanded diameter portions 6 and 12.
【００２０】さらに、筒状部材３として、軸受部材４と
同様の焼結合金により形成してもよく、この場合、筒状
部材３においても潤滑油を含浸でき、しかも両者間が毛
細管現象により接続されることから、軸受孔５への潤滑
油の供給量を増加させることができ、潤滑作用の永続性
に資することが可能となる。なお、筒状部材３への軸受
部材４、１０の固定手段として、圧入法が用いられてい
るが、これに限定するものではなく、接着やビス止め等
の他の固定手段を用いるようにしてもよい。Further, the tubular member 3 may be formed of the same sintered alloy as that of the bearing member 4. In this case, the tubular member 3 can be impregnated with lubricating oil, and the two are connected by a capillary phenomenon. As a result, the amount of lubricating oil supplied to the bearing hole 5 can be increased, which contributes to the durability of the lubricating action. Although the press-fitting method is used as a fixing means for the bearing members 4 and 10 to the tubular member 3, the fixing method is not limited to this, and other fixing means such as adhesion or screwing may be used. Good.
【００２１】また、拡径部６、１２の先端同士が突き合
わされることにより、これら拡径部６、１２の内側に
は、拡径部６、１２内周面と回転軸１外周面との間に挟
まれた空間（以下、単に内側空間という）が形成されて
いる。さらに、拡径部６、１２の先端同士が突き合わさ
れた状態では、筒状部材３内においてテーパ部７、１３
によって環状の通路が形成された状態となっている。Further, since the tips of the expanded diameter portions 6 and 12 are butted against each other, the inner peripheral surfaces of the expanded diameter portions 6 and 12 and the outer peripheral surface of the rotary shaft 1 are located inside the expanded diameter portions 6 and 12. A space (hereinafter simply referred to as an inner space) sandwiched therebetween is formed. Further, in a state where the tips of the expanded diameter portions 6 and 12 are butted against each other, the tapered portions 7 and 13 in the tubular member 3 are
A circular passage is formed by the.
【００２２】そして、拡径部６、１２の先端面にそれぞ
れ形成された第１溝部８、１４及び軸受部材４、１０外
周面にそれぞれ形成された第２溝部９、１５が上記した
テーパ部７、１３による通路に接続されることにより、
内側空間と外部とを連通する通路部が形成される。従っ
て、この内側空間の空気は、この通路部を通って外部に
放出可能な状態となるため、かかる内側空間が暖められ
ても、適宜空気を排出することにより、膨張圧を逃がす
ことができるようにしている。また、軸受部材４に設け
られた第１溝部８等によって通路部が形成されるため、
筒状部材３には何ら加工を施す必要がない。The first groove portions 8 and 14 formed on the tip surfaces of the expanded diameter portions 6 and 12 and the second groove portions 9 and 15 formed on the outer peripheral surfaces of the bearing members 4 and 10 have the above-described taper portion 7. , 13 by connecting to the passage,
A passage portion is formed that connects the inner space and the outside. Therefore, the air in the inner space can be discharged to the outside through the passage portion, so that the inflation pressure can be released by appropriately discharging the air even when the inner space is warmed. I have to. Further, since the passage portion is formed by the first groove portion 8 and the like provided in the bearing member 4,
The tubular member 3 does not need to be processed at all.
【００２３】なお、内側空間と外部とを連通させる通路
部が形成できればよいため、軸受部材４、１０のいずれ
かによって通路部が確保されるようにしてもよい。例え
ば、軸受部材４としては図２に示すものを用いる一方、
軸受部材１０としては、拡径部１２は持つものの、テー
パ面１３、第１溝部１４、第２溝部１５を設けないもの
を用いるようにしてもよい。なお、軸受部材４、１０と
して同一のものを用いることにより、軸受部材の製造ラ
インを単一化でき、製造コストの面で有利となる。Since it is only necessary to form a passage portion that allows the inner space and the outside to communicate with each other, either of the bearing members 4 and 10 may secure the passage portion. For example, while the bearing member 4 shown in FIG. 2 is used,
As the bearing member 10, a member having the expanded diameter portion 12 but not having the tapered surface 13, the first groove portion 14, and the second groove portion 15 may be used. By using the same bearing members 4 and 10, the bearing member manufacturing line can be unified, which is advantageous in terms of manufacturing cost.
【００２４】また、内側空間と外部とを連通する通路部
が形成されるため、筒状部材３中にこれら軸受部材４、
１０を嵌め込むときに、この内側空間が圧縮されて軸受
部材４、１０に含浸している潤滑油を外方に押し出して
しまうことがなく、焼結含油軸受２の製造段階で含浸油
量が減少してしまうことを回避することができる。さら
に、軸受部材４、１０の両者に拡径部６、１２を設け、
これらの先端同士を突き合わせることにより、内側空間
からの出口部分をこの内側空間の略中央に設定してい
る。Further, since the passage portion that communicates the inner space with the outside is formed, these bearing members 4, 4
When the 10 is fitted, the inner space is not compressed and the lubricating oil impregnated in the bearing members 4 and 10 is not pushed outward, and the amount of impregnated oil is reduced at the manufacturing stage of the sintered oil-impregnated bearing 2. It is possible to avoid the decrease. Further, the expanded diameter portions 6 and 12 are provided on both the bearing members 4 and 10,
By abutting these tips with each other, the outlet portion from the inner space is set substantially in the center of the inner space.
【００２５】なお、図２に示すように、第１溝部８を二
箇所、第２溝部９を四箇所に形成し、これらの位置関係
をずらして設定した場合でも、第１溝部８を通過した空
気は、テーパ部７によって形成された環状の通路によっ
て各第２溝部９に適宜分配されることになり、これによ
り内側空間からの空気の排出を効率よくスムーズに行う
ことができるようにしている。As shown in FIG. 2, even when the first groove portions 8 are formed at two locations and the second groove portions 9 are formed at four locations, and the positional relationship between them is shifted and set, the first groove portions 8 are passed through. The air is appropriately distributed to the respective second groove portions 9 by the annular passage formed by the taper portion 7, so that the air can be efficiently and smoothly discharged from the inner space. .
【００２６】ただし、第１溝部８と第２溝部９とをテー
パ部７で接続することに限定されず、第１溝部８と第２
溝部９とを直接接続させるようにしてもよい。すなわ
ち、内側空間から外部への通路部が形成されるものであ
れば、その形態は任意であり、第１溝部８や第２溝部９
の形成位置や形成個数は任意に設定できる。However, the first groove portion 8 and the second groove portion 9 are not limited to being connected by the taper portion 7, and the first groove portion 8 and the second groove portion 9 can be connected to each other.
You may make it connect directly with the groove part 9. That is, as long as the passage portion from the inner space to the outside is formed, the form thereof is arbitrary and the first groove portion 8 and the second groove portion 9 are formed.
The formation position and the formation number of can be set arbitrarily.
【００２７】続いて、この焼結含油軸受２の使用状態に
ついて説明すると、回転軸１が摺動する軸受孔５、１１
の周面からは、回転軸１の回転によるポンプ作用によっ
て潤滑油が吸い出され、回転軸１と軸受孔５、１１との
間に油膜が形成される。そして、長時間の使用によっ
て、潤滑油が消費されることにより、各軸受部材４、１
０（拡径部６、１２を含む）内に含浸されている潤滑油
が順次軸受孔５、１１の周面に吸い出されて、油膜の油
圧低下を防止し、潤滑作用を継続させるようにしてい
る。なお、拡径部６、１２は、その内径が軸受孔５、１
１より大きいため、回転軸１の回転によるポンプ作用の
影響を受けず、ここから潤滑油が吸い出されることはな
い。Next, the operating state of the sintered oil-impregnated bearing 2 will be described. The bearing holes 5 and 11 on which the rotary shaft 1 slides.
Lubricating oil is sucked from the peripheral surface by the pumping action of the rotation of the rotary shaft 1, and an oil film is formed between the rotary shaft 1 and the bearing holes 5 and 11. Then, as the lubricating oil is consumed due to long-term use, each bearing member 4, 1
The lubricating oil impregnated in 0 (including the expanded diameter portions 6 and 12) is sequentially sucked out to the peripheral surfaces of the bearing holes 5 and 11 to prevent the oil pressure of the oil film from decreasing and to continue the lubricating action. ing. The expanded diameter portions 6 and 12 have the inner diameters of the bearing holes 5 and 1, respectively.
Since it is larger than 1, it is not affected by the pump action due to the rotation of the rotary shaft 1, and the lubricating oil is not sucked out from here.
【００２８】また、回転軸１が、図１の下方を駆動側、
上方を負荷側として回転している場合では、上方に位置
する軸受部材４の軸受孔５との間において潤滑油の消費
量が多くなる。従って、軸受部材４の油量が減少したと
きには、拡径部６、１２同士が当接していることによ
り、軸受部材１０（拡径部１２）に含浸している潤滑油
が毛細管現象によって軸受部材４に送られる。逆に、軸
受部材１０の油量が減少したときには、軸受部材４から
潤滑油が送られることになる。すなわち、潤滑油の消費
量が多い軸受部材に対して他の軸受部材から適宜潤滑油
が供給されるため、全体として潤滑作用の永続性を確保
することができる。Further, the rotary shaft 1 has the lower side of FIG. 1 on the drive side,
When rotating with the upper side as the load side, the amount of lubricating oil consumed increases with the bearing hole 5 of the bearing member 4 located above. Therefore, when the amount of oil in the bearing member 4 decreases, the expanded diameter portions 6 and 12 are in contact with each other, so that the lubricating oil impregnated in the bearing member 10 (expanded diameter portion 12) is caused by the capillary phenomenon due to the capillary phenomenon. Sent to 4. On the contrary, when the amount of oil in the bearing member 10 decreases, the lubricating oil is sent from the bearing member 4. That is, since the lubricating oil is appropriately supplied from the other bearing members to the bearing member that consumes a large amount of the lubricating oil, the durability of the lubricating action can be ensured as a whole.
【００２９】なお、回転軸１が回転することにより、内
側空間内の空気が暖められて膨張するが、この内側空間
の空気は、第１溝部８、１４からテーパ部７、１３に沿
った通路を通り、さらに第２溝部９、１５を通って外部
に排出される。なお、内側空間の空気が冷やされると、
これとは逆に、外部から内側空間に空気が入り込むよう
にしている。従って、内側空間の温度変化に応じて、通
路部により内側空間への空気の流入・流出が可能である
ため、内側空間内の圧力変化によって、含浸した潤滑油
が不必要に漏出することを防止することができる。The rotation of the rotary shaft 1 warms and expands the air in the inner space. The air in the inner space passes from the first groove portions 8 and 14 to the passages along the tapered portions 7 and 13. And is discharged to the outside through the second groove portions 9 and 15. When the air in the inner space is cooled,
On the contrary, air is allowed to enter the inner space from the outside. Therefore, air can flow in and out of the inner space by the passage part according to the temperature change of the inner space, preventing the impregnated lubricating oil from leaking unnecessarily due to the pressure change in the inner space. can do.
【００３０】図３及び図４は、本発明に係る焼結含油軸
受の、他の実施の形態を示すものである。なお、筒状部
材３は、図１に示すものと同様である。図３に示す焼結
含油軸受１６は、筒状部材３内に、互いに形態の異なる
軸受部材１７、２１を嵌め込んで固定したものである。
軸受部材１７は、多孔質状の焼結合金により形成され、
かつ回転軸１が挿通される軸受孔１８が形成されたリン
グ状の一体成形型品である。従って、軸受部材１７内の
多数の空孔に潤滑油が保持される点は、図１の軸受部材
４と同様である。FIGS. 3 and 4 show another embodiment of the sintered oil-impregnated bearing according to the present invention. The tubular member 3 is similar to that shown in FIG. The sintered oil-impregnated bearing 16 shown in FIG. 3 is one in which bearing members 17 and 21 having different shapes are fitted and fixed in the tubular member 3.
The bearing member 17 is formed of a porous sintered alloy,
In addition, it is a ring-shaped integrally molded product having a bearing hole 18 through which the rotary shaft 1 is inserted. Therefore, the point that the lubricating oil is retained in a large number of holes in the bearing member 17 is similar to the bearing member 4 in FIG.
【００３１】但し、図１に示す軸受部材４のような拡径
部６が設けられたものではない。また、軸受部材１７
は、一方の先端面外周にテーパ部１９が形成されるとと
もに、外周面には軸線方向の溝部２０が設けられ、これ
ら溝部２０とテーパ部１９とを接続させるようにしてい
る。However, the enlarged diameter portion 6 such as the bearing member 4 shown in FIG. 1 is not provided. In addition, the bearing member 17
The taper portion 19 is formed on the outer periphery of one of the tip surfaces, and the groove portion 20 in the axial direction is provided on the outer peripheral surface so that the groove portion 20 and the taper portion 19 are connected to each other.
【００３２】一方、軸受部材２１には、拡径部２３が設
けられている。この拡径部２３は、図１に示す軸受部材
４の拡径部６より長手方向に長く設けられたものであ
り、多孔質状の焼結合金で一体成形される点は拡径部６
と同様である。さらに、軸受部材２１は、拡径部２３の
先端面外周に形成されたテーパ部（通路部）２４と接続
するように、拡径部２３先端面に第１溝部（通路部）２
５を、軸受部材２１外周面に第２溝部２６をそれぞれ設
けている。On the other hand, the bearing member 21 is provided with an enlarged diameter portion 23. The expanded diameter portion 23 is provided longer in the longitudinal direction than the expanded diameter portion 6 of the bearing member 4 shown in FIG. 1, and the point that the expanded diameter portion 23 is integrally molded with a porous sintered alloy is that the expanded diameter portion 6 is formed.
Is the same as. Further, the bearing member 21 has a first groove portion (passage portion) 2 on the tip end surface of the enlarged diameter portion 23 so as to be connected to a taper portion (passage portion) 24 formed on the outer periphery of the end surface of the enlarged diameter portion 23.
5 and the second groove portion 26 is provided on the outer peripheral surface of the bearing member 21.
【００３３】そして、これら軸受部材１７、２１は、図
３に示すように、筒状部材３の中で、軸受部材１７に拡
径部２３の先端面を当接（密着）させた状態で固定され
ている。従って、軸受部材１７と２１とでは、毛細管現
象によって接続された状態となる。また、拡径部２３の
内側には、図１と同様に内側空間が形成されるが、第１
溝部２５、テーパ面２４に沿った通路、第２溝部２６か
らなる通路部によって、内側空間と外部とが連通されて
いる。As shown in FIG. 3, the bearing members 17 and 21 are fixed in the tubular member 3 with the tip end surface of the expanded diameter portion 23 abutting (adhering) to the bearing member 17. Has been done. Therefore, the bearing members 17 and 21 are connected by the capillary phenomenon. An inner space is formed inside the expanded diameter portion 23 as in FIG.
The inner space and the outside are communicated with each other by the groove portion 25, the passage along the tapered surface 24, and the passage portion including the second groove portion 26.
【００３４】この焼結含油軸受１６が使用された際、軸
受部材１７、２１のいずれか一方の油量が減少したとき
には、両者が当接していることによって他方の軸受部材
から毛細管現象により潤滑油が送られる。これにより、
潤滑油の消費量が多い軸受部材に対して他の軸受部材か
ら適宜潤滑油が供給されるため、潤滑作用の永続性を確
保することができる。なお、このような図３の形態の他
に、例えば軸受部材１７に、長さが短い拡径部を設け、
拡径部同士を筒状部材３内で突き合わせるようにしても
よい。When the sintered oil-impregnated bearing 16 is used and the amount of oil in one of the bearing members 17 and 21 decreases, the contact between the bearing members 17 and 21 causes the lubricating oil from the other bearing member due to the capillary phenomenon. Will be sent. This allows
Since the lubricating oil is appropriately supplied from the other bearing members to the bearing member that consumes a large amount of the lubricating oil, the durability of the lubricating action can be ensured. In addition to such a configuration of FIG. 3, for example, the bearing member 17 is provided with an enlarged diameter portion having a short length,
The enlarged diameter portions may be abutted in the tubular member 3.
【００３５】図４に示す焼結含油軸受２７は、図１に示
す軸受部材４、１０の双方が用いられるが、軸受部材４
を逆向きとして筒状部材３に固定したものである。すな
わち、軸受部材１０の拡径部１２の先端は、軸受部材４
の軸受孔５側の端面に当接した状態となっている。その
結果、軸受孔５、１２の離間距離を短くしつつも、図１
と同様の潤滑油含浸量が確保されている。The sintered oil-impregnated bearing 27 shown in FIG. 4 uses both the bearing members 4 and 10 shown in FIG.
Is fixed to the tubular member 3 in the opposite direction. That is, the tip end of the expanded diameter portion 12 of the bearing member 10 has the bearing member 4
Is in contact with the end surface of the bearing hole 5 side. As a result, the distance between the bearing holes 5 and 12 can be shortened, and
The same amount of lubricating oil impregnation is secured.
【００３６】なお、毛細管現象によって軸受部材４、１
０間を潤滑油が送られる点や、軸受部材１０において、
第１溝部１４、テーパ部１３に沿った通路、第２溝部１
５からなる通路部によって、内側空間と外部とが連通さ
れている点は、図１に示すものと同様である。Incidentally, the bearing members 4, 1 are caused by the capillary phenomenon.
In the point where the lubricating oil is sent between 0 and the bearing member 10,
First groove portion 14, passage along tapered portion 13, second groove portion 1
The point that the inner space and the outside are communicated with each other by the passage portion formed of 5 is the same as that shown in FIG.
【００３７】また、図１、図３、図４に示すように、２
個の軸受部材を筒状部材３に固定することに限定され
ず、３個以上の軸受部材を筒状部材３内に固定し、潤滑
油含浸量の増加を図るようにしてもよい。例えば、長尺
の筒状部材を用いて、その中に図１と同様の形態で軸受
部材４、１０を固定し、さらに、軸受部材１０の下側に
図３に示す軸受部材２１を接続して、合計３個の軸受部
材を固定するものであってもよい。この場合、内側空間
が複数生じるが、それぞれに対して外部との通路部が形
成されることは勿論である。As shown in FIGS. 1, 3 and 4, 2
The number of bearing members is not limited to being fixed to the tubular member 3, and three or more bearing members may be fixed in the tubular member 3 to increase the amount of lubricating oil impregnation. For example, using a long tubular member, the bearing members 4, 10 are fixed therein in the same manner as in FIG. 1, and the bearing member 21 shown in FIG. 3 is connected to the lower side of the bearing member 10. Thus, a total of three bearing members may be fixed. In this case, a plurality of inner spaces are generated, but it goes without saying that a passage portion with the outside is formed for each.
【００３８】[0038]
【発明の効果】以上説明したとおり、請求項１に係る焼
結含油軸受は、少なくとも一の軸受部材に設けられた拡
径部が他の軸受部材に当接しているため、一の軸受部材
で含浸している油量が減少しても、当接部分を介した毛
細管現象により他の軸受部材から潤滑油を供給すること
ができる。これにより、油量の減少が激しい軸受部材に
適宜潤滑油を供給できるため、潤滑作用の永続性を確保
することができる。さらに、通路部によって拡径部の内
側空間と外部とが連通されているため、この内側空間内
部の空気が膨張しても通路部から適宜外部に排出され、
軸受孔と回転軸との間に形成されている油膜を空気が押
し出してしまうことがなく、安定した潤滑状態を維持す
ることができる。As described above, in the sintered oil-impregnated bearing according to the first aspect of the present invention, since the expanded diameter portion provided on at least one bearing member is in contact with another bearing member, one bearing member is used. Even if the amount of impregnated oil decreases, the lubricating oil can be supplied from another bearing member by the capillary phenomenon via the contact portion. As a result, the lubricating oil can be appropriately supplied to the bearing member in which the oil amount is drastically reduced, so that the durability of the lubricating action can be ensured. Further, since the inner space of the expanded diameter portion and the outside are communicated by the passage portion, even if the air inside the inner space expands, it is appropriately discharged from the passage portion to the outside,
Air does not push out the oil film formed between the bearing hole and the rotary shaft, and a stable lubrication state can be maintained.
【００３９】請求項２に係る焼結含油軸受は、２個の軸
受部材のそれぞれに拡径部を設け、かつ互いの拡径部の
端部同士を当接させるため、それぞれの軸受部材として
同一形状のものを用いることができ、軸受部材の製造コ
ストを低減させることができる。請求項３に係る焼結含
油軸受は、通路部として、拡径部の当接面に設けられた
第１溝部と、これに続くように軸受部材の外周面に設け
られた第２溝部とで構成されるため、拡径部の内側空間
と外部とを確実に連通しつつも、筒状部材に何ら加工す
る必要がなく、製造コストの低減を図ることができる。
請求項４に係る焼結含油軸受は、拡径部の端部を他の軸
受部材に当接させた際、テーパ部によって筒状部材内に
環状の通路が確保されており、この通路を用いることに
よって第１溝部の端部と第２溝部の端部とをずらして設
けているため、第２溝部の数が第１溝部より多い場合で
も空気の流れが各第２溝部に適宜分配され、この通路部
を通過する空気を効率良く外部に排出させることができ
る。In the sintered oil-impregnated bearing according to claim 2, the two bearing members are provided with the expanded diameter portions, and the ends of the expanded diameter portions are brought into contact with each other. The shape can be used, and the manufacturing cost of the bearing member can be reduced. The sintered oil-impregnated bearing according to claim 3 includes, as a passage portion, a first groove portion provided on the contact surface of the expanded diameter portion and a second groove portion provided on the outer peripheral surface of the bearing member so as to follow the passage portion. Since it is configured, the inner space of the expanded diameter portion and the outside can be surely communicated with each other, and it is not necessary to process the tubular member at all, and the manufacturing cost can be reduced.
In the sintered oil-impregnated bearing according to claim 4, when the end of the expanded diameter portion is brought into contact with another bearing member, an annular passage is secured in the tubular member by the tapered portion, and this passage is used. Since the end portions of the first groove portions and the end portions of the second groove portions are offset from each other, the air flow is appropriately distributed to each second groove portion even when the number of the second groove portions is larger than that of the first groove portions. The air passing through this passage can be efficiently discharged to the outside.
【図１】 本発明に係る焼結含油軸受の実施の形態を示
す断面図である。FIG. 1 is a sectional view showing an embodiment of a sintered oil-impregnated bearing according to the present invention.
【図２】 図１に示す軸受部材の、（ａ）は平面図、
（ｂ）は縦断面図である。FIG. 2A is a plan view of the bearing member shown in FIG.
(B) is a longitudinal sectional view.
【図３】 焼結含油軸受の、他の実施形態を示す断面図
である。FIG. 3 is a cross-sectional view showing another embodiment of a sintered oil-impregnated bearing.
【図４】 焼結含油軸受の、他の実施形態を示す断面図
である。FIG. 4 is a cross-sectional view showing another embodiment of a sintered oil-impregnated bearing.
【図５】 従来の、焼結含油軸受の実施の形態を示す断
面図である。FIG. 5 is a sectional view showing a conventional embodiment of a sintered oil-impregnated bearing.
【図６】 従来の、他の焼結含油軸受の実施の形態を示
す断面図である。FIG. 6 is a sectional view showing another embodiment of a conventional sintered oil-impregnated bearing.
１ 回転軸 ２、１６、２７ 焼結含油軸受 ３ 筒状部材 ４、１０、１７、２１ 軸受部材 ５、１１、１８、２２ 軸受孔 ６、１２、２３ 拡径部 ７、１３、２４ テーパ部（通路部） ８、１４、２５ 第１溝部（通路部） ９、１５、２６ 第２溝部（通路部） 1 rotation axis 2, 16, 27 Sintered oil-impregnated bearing 3 tubular members 4, 10, 17, 21 Bearing member 5, 11, 18, 22 Bearing holes 6, 12, 23 Expanded part 7, 13, 24 Taper part (passage part) 8, 14, 25 1st groove (passage) 9, 15, 26 Second groove (passage)
フロントページの続き (56)参考文献 特開 平４−75443（ＪＰ，Ａ) 特開 平８−109923（ＪＰ，Ａ) 特開 昭62−155323（ＪＰ，Ａ) 特開 昭61−241519（ＪＰ，Ａ) 実開 平５−55758（ＪＰ，Ｕ) 実開 昭49−1741（ＪＰ，Ｕ) 実公 昭45−5289（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 33/10 Continuation of the front page (56) Reference JP-A-4-75443 (JP, A) JP-A-8-109923 (JP, A) JP-A-62-155323 (JP, A) JP-A-61-241519 (JP , A) Jitsukai Hei 5-55758 (JP, U) Jitsukai Sho 49-1741 (JP, U) Jitsuko 45-5289 (JP, Y1) (58) Fields investigated (Int.Cl. 7 , DB) Name) F16C 33/10
Claims (4)
つ回転軸を挿通させる軸受孔が設けられた軸受部材が、
筒状部材の中に少なくとも２個嵌め込まれて互いの軸受
孔を離間させた状態で固定されてなる焼結含油軸受であ
って、 前記軸受部材の中、少なくとも一つは、前記軸受孔より
内径が拡げられかつ前記筒状部材の長手方向に延びる拡
径部が設けられるとともに、この拡径部の端部を他の軸
受部材に当接させるようにして設置され、 前記軸受部材同士の当接部分、及び当該軸受部材外周面
と筒状部材内周面との間にわたって、前記拡径部の内側
空間と外部とを連通させる通路部が設けられることを特
徴とする焼結含油軸受。1. A bearing member formed of a porous sintered alloy and provided with a bearing hole for inserting a rotary shaft,
A sintered oil-impregnated bearing, wherein at least two of the bearing members are fitted in a tubular member and are fixed in a state where their bearing holes are separated from each other, wherein at least one of the bearing members has an inner diameter larger than that of the bearing hole. Is provided and an expanded diameter portion that extends in the longitudinal direction of the tubular member is provided, and the end portion of the expanded diameter portion is installed so as to contact another bearing member, and the bearing members contact each other. A sintered oil-impregnated bearing, characterized in that a passage portion is provided between the outer peripheral surface of the bearing member and the inner peripheral surface of the tubular member, the passage portion communicating the inner space of the expanded diameter portion with the outside.
受部材のそれぞれには前記拡径部が設けられ、かつ互い
の当該拡径部の端部同士を当接させるようにしたことを
特徴とする請求項１記載の焼結含油軸受。2. The expanded diameter portion is provided in each of the two bearing members fixed to the tubular member, and the ends of the expanded diameter portion are brought into contact with each other. The sintered oil-impregnated bearing according to claim 1.
けられた第１溝部と、これに続くように前記軸受部材の
外周面に設けられた第２溝部とで構成されることを特徴
とする請求項１又は２記載の焼結含油軸受。3. The passage portion includes a first groove portion provided on the contact surface of the expanded diameter portion and a second groove portion provided on the outer peripheral surface of the bearing member so as to follow the first groove portion. The sintered oil-impregnated bearing according to claim 1 or 2, characterized in that.
をずらして設定するとともに、両者間を、前記拡径部の
端部外周に設けられたテーパ部で接続するようにしたこ
とを特徴とする請求項３記載の焼結含油軸受。4. The end of the first groove and the end of the second groove are set so as to be offset from each other, and the both are connected by a taper portion provided on the outer circumference of the end of the enlarged diameter portion. The sintered oil-impregnated bearing according to claim 3, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11488597A JP3508463B2 (en) | 1997-05-02 | 1997-05-02 | Sintered oil-impregnated bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11488597A JP3508463B2 (en) | 1997-05-02 | 1997-05-02 | Sintered oil-impregnated bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10306826A JPH10306826A (en) | 1998-11-17 |
| JP3508463B2 true JP3508463B2 (en) | 2004-03-22 |
Family
ID=14649110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11488597A Expired - Fee Related JP3508463B2 (en) | 1997-05-02 | 1997-05-02 | Sintered oil-impregnated bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3508463B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060269179A1 (en) * | 2003-06-20 | 2006-11-30 | Motohiro Miyasaka | Oil-impregnated sintered bearing |
| KR101238205B1 (en) | 2006-06-22 | 2013-03-04 | 엘지전자 주식회사 | Bearing device for scroll compressor |
-
1997
- 1997-05-02 JP JP11488597A patent/JP3508463B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10306826A (en) | 1998-11-17 |
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