JP4469033B2

JP4469033B2 - Cylindrical bearing and structure for fixing the cylindrical bearing

Info

Publication number: JP4469033B2
Application number: JP18372499A
Authority: JP
Inventors: 博須田; 敏彦関根
Original assignee: Oiles Corp
Current assignee: Oiles Corp
Priority date: 1999-06-29
Filing date: 1999-06-29
Publication date: 2010-05-26
Anticipated expiration: 2019-06-29
Also published as: JP2001012454A

Description

【０００１】
【発明が属する技術分野】
本発明は、円板状の合成樹脂製軸受片を複数個重層して構成した円筒状軸受および該円筒状軸受の固定構造に関するものである。
【０００２】
【発明が解決しようとする課題】
円板状の軸受片を複数個重層して構成した軸受体をハウジング内に保持してなる軸受は、例えば実開昭５１−１０７５５０号公報などにおいて知られている。この従来技術からなる軸受は、軸受片の摺動面を構成する部分に面取り、テーパーあるいは段部を設け、互いに重層した状態において摺動面に環状凹部を形成するようにし、当該環状凹部に固体潤滑剤を充填したものである。
【０００３】
上述した軸受においては、摺動面に固体潤滑剤を充填する溝あるいは凹部を機械加工によって形成する必要がなく、当該機械加工に費やされる労力、時間等を減少させ得るという利点を有するものである。
【０００４】
しかしながら、従来技術からなる軸受は複数個の軸受片を重層したのち、これをハウジング内に保持する必要があること、またハウジングは軸受長さに応じてその都度用意する必要があること、など組立時の煩雑さがある。また、この軸受を取付部材に固定する場合には、取付部材と軸受との間に別途固定用の部材や治具等が必要となる。
【０００５】
本発明は、前記諸点に鑑みてなされたものであって、その目的とするところは、前記従来技術における利点を有効に利用するとともに組立時の煩雑さを取り除き、取付部材への軸受の固定を簡単に行えるようにした円筒状軸受および該円筒状軸受の固定構造を提供することにある。
【０００６】
【課題解決するための手段】
本発明の円筒状軸受は、中央部に円孔と該円孔の一方の開口部側の端面に該円孔の周方向に突設された少なくとも２個の係合突出部と該円孔の他方の開口部側の端面に前記係合突出部と一致することなく該円孔の周方向に形成された少なくともの２個の係合凹部とを具備した円板状の合成樹脂製樹脂軸受片の少なくとも２個が、一方の該軸受片の係合突出部を他方の該軸受片の係合凹部に弾性装着させて重層されており、該円孔によって形成される内周面には少なくとも一個の環状溝が形成されているとともに該環状溝には潤滑油剤が充填されており、前記係合突出部は円柱状突起部と該突起部の先端に一体の形成された膨大部とからなり、前記係合凹部は円孔と該円孔と連続する凹部とからなり、該膨大部は半球状、円錐状、截頭円錐状または球状の膨大部からなり、該凹部は該膨大部の形状に対応する半球状、円錐状、截頭円錐状または球状の凹部からなり、前記環状溝は重層された相隣合う合成樹脂軸受片の円孔周縁に形成された面取り部または拡径凹部によって形成され、該面取り部はＲ面取りまたはＣ面取りである。
【０００７】
第一の態様の円筒状軸受によれば、一方の合成樹脂製軸受片の係合突出部を他方の合成樹脂製軸受片の係合凹部に弾性装着させて重層されているので、別途ハウジング等の保持部材を必要とせず、また軸受長さは該軸受片を単に足すだけで所望の軸受長さをもった円筒状軸受とすることができる。
【００１０】
本発明の円筒状軸受によれば、一方の合成樹脂製軸受片に形成された円柱状突起部と該円柱状突起部の先端に一体に形成された膨大部を他方の合成樹脂製軸受片に形成された円孔と該円孔と連続する該膨大部の形状に対応する凹部に弾性装着することにより重層するだけで所望の軸受長さの円筒状軸受とすることができる。また、本発明の円筒状軸受によれば、潤滑油剤溜り用の環状溝は機械加工によらず形成されるため、機械加工に要する時間、労力等を必要とせず、コスト低減を図ることができる。
【００１４】
本発明の円筒状軸受の固定構造では、円筒状軸受の一方の端面側に突出した少なくとも２個の係合突出部を取付部材に形成された少なくとも２個の係合部に弾性装着させて該取付部材に固定されている。
【００１５】
本発明の円筒状軸受の固定構造によれば、円筒状軸受の一方の端面に突設された少なくとも２個の係合突出部を、取付部材に形成された少なくとも２個の係合部に弾性装着させるだけで簡単に該取付部材に固定することができ、別途固定用の部材や治具等を必要としない。
【００１６】
【発明の実施の形態】
つぎに、本発明およびその実施の形態を、図を参照して更に詳細に説明する。なお、本発明はこれら実施の形態に何等限定されないのである。
【００１７】
図１から図４において、合成樹脂製軸受片１０は円板状をなし、その中央部に円孔１１と該円孔１１の一方の開口部側の端面１２に該円孔１１の周方向に等間隔に突設された３個の係合突出部１３と該円孔１１の他方の開口部側の端面１４に前記係合突出部１３と一致することなく該円孔１１の周方向に等間隔に形成された３個の係合凹部１５とを具備している。
【００１８】
該円孔１１の一方の開口部側の端面１２に該円孔１１の周方向に等間隔に突設された係合突出部１３は、円柱状突起部１６と該突起部１６の先端に一体に形成された半球状の膨大部１７とからなる。
【００１９】
該円孔１１の他方の開口部側の端面１４に前記係合突出部１３と一致することなく該円孔１１の周方向に等間隔に形成された係合凹部１５は、円孔１８と該円孔１８と連続し前記半球状の膨大部に対応する半球状の凹部１９とからなる。
【００２０】
該合成樹脂製軸受片１０の円孔１１周縁にはＲ面取り２０が施されている。
【００２１】
上述した構成からなる該軸受片１０を形成する合成樹脂は、ポリアセタール樹脂、ポリアミド樹脂、ポリエチレン樹脂などのポリオレフィン樹脂、ポリエステルエラストマー、ポリウレタン樹脂などが好適に使用される。
【００２２】
このように形成された合成樹脂製軸受片１０は複数個用意され（実施例では５個）、一方の該軸受片１０の円柱状突起部１６と該突起部１６の先端に一体に形成された半球状の膨大部１７とからなる係合突出部１３を、隣合う他方の該軸受片１０の円孔１８と該円孔１８と連続し該膨大部１７の形状に対応する半球状の凹部１９とからなる係合凹部１５に順次弾性装着させて重層することにより円筒状軸受１が構成される。
【００２３】
合成樹脂製軸受片１０を重層することにより構成された円筒状軸受１の内周面には、該円孔１１周縁に形成されたＲ面取り２０によって複数個（実施例では4個）の環状溝３０が形成される。この環状溝３０はグリース等の潤滑油剤の溜り部となる。
【００２４】
このように一方の合成樹脂製軸受片１０の係合突出部１３を隣合う他方の合成樹脂製軸受片１０の係合凹部１５に順次弾性装着させて重層されているので、別途ハウジング等の保持部材を必要とせず、また軸受長さは該軸受片１０を単に足すだけで所望の軸受長さをもった円筒状軸受とすることができる。また、円筒状軸受１の内周面には該円孔１１周縁に形成されたＲ面取り２０によって複数個の潤滑油剤の溜り部用の環状溝３０が形成されるので、機械加工に要する時間、労力等を必要とせず、コスト低減を図ることができる。
【００２５】
図７および図８は、合成樹脂製軸受片１０および該軸受片１０を重層して構成される円筒状軸受の他の実施例を示すもので、該軸受１０の円孔１１周縁にはＣ面取り２１が施されている。この円孔１１周縁にＣ面取り２１が施された円筒状軸受１の内周面には該Ｃ面取り２１によって複数個の潤滑油剤の溜り部用の環状溝３０が形成される。
【００２６】
図９および図１０は、合成樹脂製軸受片１０および該軸受片１０を重層して構成される円筒状軸受のさらに他の実施例を示すもので、該軸受１０の円孔１１周縁には拡径凹部２２が形成されている。この円孔１１周縁に拡径凹部２２が形成された合成樹脂製軸受片１０を前記実施例と同様に重層して円筒状軸受１を構成することにより、該軸受１の内周面には該拡径凹部２２によって複数個の潤滑油剤の溜り部用の環状溝３０が形成される。
【００２７】
上述した環状溝３０はいずれもその深さを適宜調整、すなわちＲ面取り２０においてはその径の大小により、またＣ面取り２１においては一辺の長さの長短により、拡径凹部２２においてはその径の大小および深さの大小により、当該環状溝３０を浅くも深くもすることができる。
【００２８】
図１１は、上述した構成からなる円筒状軸受１の固定構造を示すものである。すなわち、円筒状軸受１の一方の端面側に突設された係合突出部１３を、取付部材４０に形成された係合部である孔４１に弾性装着することにより、該軸受１を取付部材４０に簡単に固定することができ、別途固定用の部材や治具等を必要としない。
【００２９】
図１２は、合成樹脂製軸受片１０の他の実施例を示すもので、合成樹脂製軸受片１０は円板状をなし、その中央部に円孔１１と該円孔１１の一方の開口部側の端面１２に該円孔１１の周方向に等間隔に突設された３個の円柱状突起部１６と該突起部１６の先端に一体に形成された円錐状の膨大部１７とからなる係合突出部１３と、該円孔１１の他方の開口部側の端面１４に該係合突出部１３と一致することなく該円孔１１の周方向に等間隔に形成された３個の円孔１８と該円孔１８と連続し該円錐状の膨大部１７に対応する円錐状の凹部１９とからなる係合凹部１５とを具備している。
【００３０】
図１３は、合成樹脂製軸受片１０のさらに他の実施例を示すもので、合成樹脂製軸受片１０は円板状をなし、その中央部に円孔１１と該円孔１１の一方の開口部側の端面１２に該円孔１１の周方向に等間隔に突設された３個の円柱状突起部１６と該突起部１６の先端に一体に形成された截頭円錐状の膨大部１７とからなる係合突出部１３と、該円孔１１の他方の開口部側の端面１４に該係合突出部１３と一致することなく該円孔１１の周方向に等間隔に形成された３個の円孔１８と該円孔１８と連続し該截頭円錐状の膨大部１７に対応する截頭円錐状の凹部１９とからなる係合凹部１５とを具備している。
【００３１】
図１４は、合成樹脂製軸受片１０のさらに他の実施例を示すもので、合成樹脂製軸受片１０は円板状をなし、その中央部に円孔１１と該円孔１１の一方の開口部側の端面１２に該円孔１１の周方向に等間隔に突設された３個の円柱状突起部１６と該突起部１６の先端に一体に形成された球状の膨大部１７とからなる係合突出部１３と、該円孔１１の他方の開口部側の端面１４に該係合突出部１３と一致することなく該円孔１１の周方向に等間隔に形成された３個の円孔１８と該円孔１８と連続し該球状の膨大部１７に対応する球状の凹部１９とからなる係合凹部１５とを具備している。
【００３２】
上述した図１２、図１３および図１４に示した合成樹脂製軸受片１０は、それぞれ複数個用意され、一方の該軸受片１０の円柱状突起部１６と該突起部１６の先端に一体に形成された膨大部１７とからなる係合突出部１３を、隣合う他方の該軸受片１０の円孔１８と該円孔１８と連続し該膨大部１７の形状に対応する凹部１９とからなる係合凹部１５に順次弾性装着させて重層することにより円筒状軸受１が構成される。
【００３３】
【発明の効果】
本発明によれば、軸受本体、該軸受とハウジングとの固定等の組立時の煩雑さを取り除くことができ、軸受長さは軸受片を単に足すだけで所望の軸受長さをもった円筒状軸受とすることができる。また、円筒状軸受の内周面には環状溝が形成されているので別途機械加工等を必要とせず、当該機械加工に費やされる労力、時間等を減少させることができる。
【図面の簡単な説明】
【図１】本発明の好ましい実施の形態の円筒状軸受の一例を示す縦断面図である。
【図２】図１の左側面図である。
【図３】図１の右側面図である。
【図４】合成樹脂軸受片の縦断面図である。
【図５】図４のＡ部拡大図である。
【図６】図４のＢ部拡大図である。
【図７】合成樹脂製軸受片の他の実施の形態を示す縦断面図である。
【図８】図７に示す合成樹脂軸受片を使用した円筒状軸受の縦断面図である。
【図９】合成樹脂軸受片の他の実施の形態を示す縦断面図である。
【図１０】図９に示す合成樹脂軸受片を使用した円筒状軸受を示す縦断面図である。
【図１１】本発明の円筒状軸受と取付部材との固定構造の一例を示す縦断面図である。
【図１２】合成樹脂軸受片の他の実施の形態を示す縦断面図である。
【図１３】合成樹脂軸受片の他の実施の形態を示す縦断面図である。
【図１４】合成樹脂軸受片の他の実施の形態を示す縦断面図である。
【符号の説明】
１円筒状軸受
１０合成樹脂製軸受片
１１円孔
１３係合突出部
１５係合凹部
３０環状溝
４０取付部材[0001]
[Technical field to which the invention belongs]
The present invention relates to a cylindrical bearing formed by stacking a plurality of disc-shaped synthetic resin bearing pieces and a fixing structure of the cylindrical bearing.
[0002]
[Problems to be solved by the invention]
For example, Japanese Utility Model Publication No. 51-107550 discloses a bearing in which a bearing body formed by stacking a plurality of disc-shaped bearing pieces is held in a housing. In this conventional bearing, a chamfered portion, a taper or a step portion is provided in a portion constituting the sliding surface of the bearing piece, and an annular recess is formed on the sliding surface in a state where they are overlapped with each other. It is filled with a lubricant.
[0003]
In the above-described bearing, it is not necessary to form a groove or a recess filled with a solid lubricant on the sliding surface by machining, and it has an advantage that labor, time, etc. spent on the machining can be reduced. .
[0004]
However, the prior art bearings need to be stacked in a plurality of bearing pieces and then held in the housing, and the housing must be prepared each time according to the bearing length. There is time complexity. Further, when the bearing is fixed to the mounting member, a separate fixing member, jig, or the like is required between the mounting member and the bearing.
[0005]
The present invention has been made in view of the above-mentioned points, and the object thereof is to effectively use the advantages of the above-described conventional technology, remove the complexity at the time of assembly, and fix the bearing to the mounting member. It is an object of the present invention to provide a cylindrical bearing and a fixing structure for the cylindrical bearing that can be easily performed.
[0006]
[Means for solving the problems]
The cylindrical bearing of the present invention has a circular hole at the center, at least two engaging protrusions projecting in the circumferential direction of the circular hole on the end surface on one opening side of the circular hole, and the circular hole. A disc-shaped synthetic resin resin bearing piece having at least two engaging recesses formed in the circumferential direction of the circular hole without matching with the engaging protrusion on the end surface on the other opening side At least two of the bearing pieces are layered by elastically mounting the engaging protrusions of one of the bearing pieces into the engaging recesses of the other bearing piece, and at least one of the inner peripheral surface formed by the circular hole. And the annular groove is filled with a lubricant, and the engaging protrusion is composed of a cylindrical protrusion and an enormous part integrally formed at the tip of the protrusion, The engaging concave portion is composed of a circular hole and a concave portion continuous with the circular hole, and the enormous portion is hemispherical, conical, or frustoconical. Is composed of a spherical enormous portion, the recess is composed of a hemispherical, conical, frustoconical or spherical concavity corresponding to the shape of the enormous portion, and the annular grooves are layered on adjacent synthetic resin bearing pieces The chamfered portion is formed by a chamfered portion or an enlarged-diameter concave portion formed on the periphery of the circular hole, and the chamfered portion is an R chamfer or a C chamfer.
[0007]
According to the cylindrical bearing of the first aspect, the engagement protrusion of one synthetic resin bearing piece is layered by being elastically mounted in the engagement recess of the other synthetic resin bearing piece. The bearing member can be made into a cylindrical bearing having a desired bearing length simply by adding the bearing pieces.
[0010]
According to the cylindrical bearing of the present invention, a large portion integrally formed at the tip of the cylindrical protrusion formed on one of the synthetic resin bearing piece and the cylindrical protrusion on the other of the synthetic resin bearing piece A cylindrical bearing having a desired bearing length can be obtained simply by overlaying the formed circular hole and the concave portion corresponding to the shape of the enormous portion continuous with the circular hole. In addition, according to the cylindrical bearing of the present invention, the annular groove for retaining the lubricant is formed without machining, so that the time and labor required for machining are not required, and the cost can be reduced. .
[0014]
In the cylindrical bearing fixing structure according to the present invention, at least two engaging protrusions protruding toward one end surface of the cylindrical bearing are elastically attached to at least two engaging portions formed on the mounting member. It is fixed to the mounting member.
[0015]
According to the fixing structure of the cylindrical bearing of the present invention, at least two engaging protrusions protruding from one end surface of the cylindrical bearing are elastically formed into at least two engaging portions formed on the mounting member. It can be easily fixed to the mounting member simply by being mounted, and no additional fixing member or jig is required.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention and its embodiments will be described in more detail with reference to the drawings. The present invention is not limited to these embodiments.
[0017]
1 to 4, the synthetic resin bearing piece 10 has a disc shape, and has a circular hole 11 in the center thereof and an end face 12 on one opening side of the circular hole 11 in the circumferential direction of the circular hole 11. The three engaging protrusions 13 projecting at equal intervals and the end face 14 on the other opening side of the circular hole 11 do not coincide with the engaging protruding part 13, and the like in the circumferential direction of the circular hole 11. And three engaging recesses 15 formed at intervals.
[0018]
Engagement protrusions 13 projecting at equal intervals in the circumferential direction of the circular hole 11 on the end face 12 on the one opening side of the circular hole 11 are integrated with the columnar protrusion 16 and the tip of the protrusion 16. It consists of a hemispherical enormous portion 17 formed in.
[0019]
Engagement recesses 15 formed at equal intervals in the circumferential direction of the circular hole 11 without being coincident with the engagement protrusion 13 on the end surface 14 on the other opening side of the circular hole 11, It consists of a hemispherical recess 19 that is continuous with the circular hole 18 and corresponds to the hemispherical bulge.
[0020]
An R chamfer 20 is provided on the periphery of the circular hole 11 of the synthetic resin bearing piece 10.
[0021]
As the synthetic resin forming the bearing piece 10 having the above-described configuration, polyacetal resin, polyamide resin, polyolefin resin such as polyethylene resin, polyester elastomer, polyurethane resin, or the like is preferably used.
[0022]
A plurality of synthetic resin bearing pieces 10 formed in this way are prepared (in the embodiment, five pieces), and are formed integrally with the cylindrical protrusion 16 of one of the bearing pieces 10 and the tip of the protrusion 16. The engaging protrusion 13 composed of the hemispherical enlarging portion 17 is connected to the circular hole 18 of the other adjacent bearing piece 10 and the hemispherical recess 19 corresponding to the shape of the enlarging portion 17. The cylindrical bearing 1 is configured by sequentially elastically mounting and overlapping the engaging recess 15 formed of
[0023]
A plurality of (four in the embodiment) annular grooves are formed on the inner peripheral surface of the cylindrical bearing 1 formed by stacking the synthetic resin bearing pieces 10 by the R chamfer 20 formed on the periphery of the circular hole 11. 30 is formed. The annular groove 30 serves as a reservoir for lubricating oil such as grease.
[0024]
In this way, the engaging protrusion 13 of one synthetic resin bearing piece 10 is sequentially elastically attached to the engaging recess 15 of the other synthetic resin bearing piece 10 adjacent to each other, so that a separate housing or the like is held. No member is required, and the bearing length can be a cylindrical bearing having a desired bearing length by simply adding the bearing piece 10. Further, since the plurality of annular grooves 30 for the reservoir of the lubricating oil agent are formed on the inner peripheral surface of the cylindrical bearing 1 by the R chamfer 20 formed at the periphery of the circular hole 11, the time required for machining, Costs can be reduced without requiring labor or the like.
[0025]
FIGS. 7 and 8 show another embodiment of a synthetic resin bearing piece 10 and a cylindrical bearing formed by stacking the bearing pieces 10, and a C chamfer is formed around the circular hole 11 of the bearing 10. 21 is given. On the inner peripheral surface of the cylindrical bearing 1 having a C-chamfer 21 on the periphery of the circular hole 11, a plurality of annular grooves 30 for storing a lubricant are formed by the C-chamfer 21.
[0026]
FIGS. 9 and 10 show still another embodiment of a synthetic resin bearing piece 10 and a cylindrical bearing formed by stacking the bearing pieces 10. A radial recess 22 is formed. By forming the cylindrical bearing 1 by stacking the synthetic resin bearing pieces 10 having the enlarged diameter recessed portions 22 formed on the periphery of the circular hole 11 in the same manner as in the above embodiment, the inner peripheral surface of the bearing 1 has the An annular groove 30 for a plurality of reservoirs of lubricating oil is formed by the enlarged diameter recess 22.
[0027]
Any of the above-described annular grooves 30 is adjusted in depth as appropriate, that is, the diameter of the chamfered chamfer 20 depends on the size of the diameter, the chamfered chamfer 21 depends on the length of one side, and the diameter of the expanded crevice 22 increases. Depending on the size and depth, the annular groove 30 can be shallow or deep.
[0028]
FIG. 11 shows a fixing structure of the cylindrical bearing 1 having the above-described configuration. That is, the engagement protrusion 13 projecting from one end face side of the cylindrical bearing 1 is elastically attached to the hole 41 which is an engagement portion formed in the attachment member 40, whereby the bearing 1 is attached to the attachment member. 40 can be easily fixed, and no additional fixing member or jig is required.
[0029]
FIG. 12 shows another embodiment of the synthetic resin bearing piece 10. The synthetic resin bearing piece 10 has a disk shape, and a circular hole 11 and one opening of the circular hole 11 at the center thereof. It is composed of three columnar projections 16 projecting at equal intervals in the circumferential direction of the circular hole 11 on the side end surface 12 and a conical enormous portion 17 integrally formed at the tip of the projection 16. Three circles formed at equal intervals in the circumferential direction of the circular hole 11 on the end face 14 on the other opening side of the circular hole 11 without matching with the engaging protruding part 13. The hole 18 and the engagement recess 15 which is continuous with the circular hole 18 and includes a conical recess 19 corresponding to the conical enormous portion 17 are provided.
[0030]
FIG. 13 shows still another embodiment of the synthetic resin bearing piece 10. The synthetic resin bearing piece 10 has a disk shape, and a circular hole 11 and one opening of the circular hole 11 at the center thereof. Three columnar projections 16 projecting at equal intervals in the circumferential direction of the circular hole 11 on the end surface 12 on the part side, and a frustoconical enormous portion 17 integrally formed at the tip of the projection 16 3 formed at equal intervals in the circumferential direction of the circular hole 11 on the end surface 14 on the other opening side of the circular hole 11 without matching the engaging protruding part 13. There are provided a circular hole 18 and an engaging recess 15 that is continuous with the circular hole 18 and includes a frustoconical recess 19 corresponding to the frustoconical enormous portion 17.
[0031]
FIG. 14 shows still another embodiment of the synthetic resin bearing piece 10. The synthetic resin bearing piece 10 has a disk shape, and a circular hole 11 and one opening of the circular hole 11 at the center thereof. It is composed of three columnar projections 16 projecting at equal intervals in the circumferential direction of the circular hole 11 on the end surface 12 on the part side and a spherical enormous portion 17 integrally formed at the tip of the projection 16. Three circles formed at equal intervals in the circumferential direction of the circular hole 11 on the end face 14 on the other opening side of the circular hole 11 without matching with the engaging protruding part 13. An engagement recess 15 is formed which includes a hole 18 and a spherical recess 19 which is continuous with the circular hole 18 and corresponds to the spherical enormous portion 17.
[0032]
A plurality of the synthetic resin bearing pieces 10 shown in FIGS. 12, 13, and 14 are prepared, and are formed integrally with the cylindrical protrusion 16 of one of the bearing pieces 10 and the tip of the protrusion 16. The engagement protrusion 13 composed of the enlarged portion 17 is connected to the circular hole 18 of the other adjacent bearing piece 10 and the concave portion 19 which is continuous with the circular hole 18 and corresponds to the shape of the huge portion 17. The cylindrical bearing 1 is configured by sequentially elastically attaching to the mating recess 15 and overlaying them.
[0033]
【The invention's effect】
According to the present invention, it is possible to remove the complexity of assembly such as fixing the bearing body and the bearing and the housing, and the bearing length is a cylindrical shape having a desired bearing length simply by adding a bearing piece. It can be a bearing. Further, since an annular groove is formed on the inner peripheral surface of the cylindrical bearing, it is not necessary to perform machining or the like separately, and the labor, time, etc. spent for the machining can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of a cylindrical bearing according to a preferred embodiment of the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a longitudinal sectional view of a synthetic resin bearing piece.
FIG. 5 is an enlarged view of a part A in FIG. 4;
6 is an enlarged view of a portion B in FIG. 4;
FIG. 7 is a longitudinal sectional view showing another embodiment of a synthetic resin bearing piece.
8 is a longitudinal sectional view of a cylindrical bearing using the synthetic resin bearing piece shown in FIG.
FIG. 9 is a longitudinal sectional view showing another embodiment of the synthetic resin bearing piece.
10 is a longitudinal sectional view showing a cylindrical bearing using the synthetic resin bearing piece shown in FIG. 9;
FIG. 11 is a longitudinal sectional view showing an example of a fixing structure between the cylindrical bearing and the mounting member of the present invention.
FIG. 12 is a longitudinal sectional view showing another embodiment of the synthetic resin bearing piece.
FIG. 13 is a longitudinal sectional view showing another embodiment of the synthetic resin bearing piece.
FIG. 14 is a longitudinal sectional view showing another embodiment of the synthetic resin bearing piece.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical bearing 10 Synthetic-resin bearing piece 11 Circular hole 13 Engagement protrusion 15 Engagement recessed part 30 Annular groove 40 Mounting member

Claims

A structure for fixing to a mounting member a cylindrical bearing formed by stacking a plurality of disc-shaped synthetic resin bearing pieces, wherein the cylindrical bearing has a circular hole and one of the circular holes. At least two engagement protrusions projecting in the circumferential direction of the circular hole on the end surface on the opening side of the circular hole and the end surface on the other opening side of the circular hole without matching the engagement protrusion At least two of the disc-shaped synthetic resin resin bearing pieces having at least two engaging recesses formed in the circumferential direction of the circular hole have the engaging protrusions of one of the bearing pieces as the other of the engaging protrusions. The engagement recesses of the bearing pieces are elastically mounted and layered, and at least one annular groove is formed on the inner peripheral surface formed by the circular hole, and the annular groove is filled with a lubricant. cage, the engaging protrusion is composed of a large portion integrally formed at the tip of the cylindrical projection and the protrusion portion, The engaging concave portion is composed of a circular hole and a concave portion continuous with the circular hole, the enormous portion is composed of a hemispherical shape, a conical shape, a truncated conical shape, or a spherical enormous portion, and the concave portion has a shape of the enormous portion. Corresponding hemispherical, conical, frustoconical or spherical recesses, the annular groove is formed by chamfered or enlarged recesses formed at the periphery of the circular holes of the laminated synthetic resin bearing pieces. The chamfered portion is R chamfered or C chamfered, and at least two engaging protrusions protruding toward one end surface of the cylindrical bearing are elastically attached to at least two engaging portions formed on the mounting member. A fixing structure of a cylindrical bearing fixed to the mounting member.