JP2007100905A - Self-aligning slide bearing and its outer ring manufacturing method - Google Patents

Self-aligning slide bearing and its outer ring manufacturing method Download PDF

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JP2007100905A
JP2007100905A JP2005293931A JP2005293931A JP2007100905A JP 2007100905 A JP2007100905 A JP 2007100905A JP 2005293931 A JP2005293931 A JP 2005293931A JP 2005293931 A JP2005293931 A JP 2005293931A JP 2007100905 A JP2007100905 A JP 2007100905A
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ring
inner ring
outer ring
self
groove
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Kengo Takai
研吾 高井
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TAKAI SEIKI KK
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • F16C23/04—Sliding-contact bearings self-adjusting
    • F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
    • F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
    • 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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/02—Assembling sliding-contact bearings

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-aligning slide bearing with an inner ring easy to assemble in an outer ring. <P>SOLUTION: The self-aligning slide bearing 1 comprises the outer ring 10 having a spherical inner peripheral face 11 and the inner ring 20 having a spherical outer peripheral face 21 and assembled inside thereof to be smoothly rotatable relative to the outer ring 10. The outer ring 10 formed of a synthetic resin has a groove 13 formed in at least one end face 12 out of both end faces 12, 12 along the circumferential direction of the end face 12, and an inner peripheral portion 14 and an outer peripheral portion 16 parted from each other with the groove 13. During assembling the inner ring 20, the inner peripheral face 11 of the outer ring 10 is pushed by the outer peripheral face 21 of the inner ring 20 and the inner peripheral portion 14 is distorted to the side of the groove 13. In the condition of assembling the inner ring 20, the inner peripheral portion 14 whose distortion is restored holds the outer peripheral face 21 of the inner ring 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、球面状の内周面を有する外輪の内側に、該内周面に摺接する球面状の外周面を有する内輪を組み付けてなり、外輪と内輪とを円滑に相対回転可能とした自動調心すべり軸受に関し、さらに該自動調心すべり軸受の外輪の製造方法に関する。   The present invention is an automatic system in which an inner ring having a spherical outer peripheral surface that is in sliding contact with the inner peripheral surface is assembled inside an outer ring having a spherical inner peripheral surface so that the outer ring and the inner ring can smoothly rotate relative to each other. The present invention relates to a self-aligning plain bearing, and further relates to a method for manufacturing an outer ring of the self-aligning plain bearing.

従来の自動調心すべり軸受としては、例えば特許文献１に示すようなものがある。
すなわち、球面状に形成された内周面を有する外輪と、球面状に形成された外周面を有し、外輪の内側に配置された内輪とを備え、外輪の内周面と内輪の外周面とが摺接しながら円滑に相対的な回転が可能であり、これにより自動的に調心できるものである。 As a conventional self-aligning plain bearing, for example, there is one shown in Patent Document 1.
That is, an outer ring having an inner circumferential surface formed in a spherical shape and an inner ring disposed on the inner side of the outer ring having an outer circumferential surface formed in a spherical shape, the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring. And can smoothly rotate relative to each other while being in sliding contact with each other.

特開２００５−２１４３１４号公報JP-A-2005-214314

しかしながら、このような従来の技術では、外輪の端面の内径が内輪の外周面の径よりも小さいので外輪に内輪を組み付けることが容易ではないという問題点があった。   However, such a conventional technique has a problem that the inner ring is not easily assembled to the outer ring because the inner diameter of the end surface of the outer ring is smaller than the outer diameter of the inner ring.

また、外輪の内周面の径が端面の内径よりも大きいので、例えば外輪を合成樹脂による射出成形で製造するときは、外輪を金型から抜き取ることが容易ではないという問題点があった。   Further, since the diameter of the inner peripheral surface of the outer ring is larger than the inner diameter of the end surface, for example, when the outer ring is manufactured by injection molding with synthetic resin, there is a problem that it is not easy to remove the outer ring from the mold.

本発明は、このような従来の技術が有する問題点に着目してなされたもので、外輪への内輪の組み付けが容易にできる自動調心すべり軸受を提供することを目的としている。   The present invention has been made paying attention to such problems of the prior art, and an object thereof is to provide a self-aligning plain bearing capable of easily assembling an inner ring to an outer ring.

また、本発明は、自動調心すべり軸受の外輪が容易に製造できる外輪の製造方法を提供することを目的としている。   Another object of the present invention is to provide a method of manufacturing an outer ring that can easily manufacture an outer ring of a self-aligning slide bearing.

かかる目的を達成するための本発明の要旨とするところは、次の各項の発明に存する。
［１］球面状の内周面（１１）を有する外輪（１０）の内側に、該内周面（１１）に摺接する球面状の外周面（２１）を有する内輪（２０）を組み付けてなり、前記外輪（１０）と内輪（２０）とを円滑に相対回転可能とした自動調心すべり軸受（１）において、
前記外輪（１０）は合成樹脂であり、両端面（１２，１２）のうち少なくとも一方の端面（１２）に該端面（１２）の円周方向に沿って形成された溝（１３）と、該溝（１３）によって分けられた内周部（１４）および外周部（１６）とを備え、
前記内周部（１４）は、前記内輪（２０）を組み付ける際に前記内周面（１１）を前記内輪（２０）の外周面（２１）に押されて前記溝（１３）側に歪み、前記内輪（２０）が組み付けられた状態では、前記歪みが復元して前記内輪（２０）の外周面（２１）を保持することを特徴とする自動調心すべり軸受（１）。 The gist of the present invention for achieving the object lies in the inventions of the following items.
[1] An inner ring (20) having a spherical outer peripheral surface (21) that is in sliding contact with the inner peripheral surface (11) is assembled inside an outer ring (10) having a spherical inner peripheral surface (11). In the self-aligning plain bearing (1) in which the outer ring (10) and the inner ring (20) can smoothly rotate relative to each other,
The outer ring (10) is a synthetic resin, and grooves (13) formed along the circumferential direction of the end surface (12) on at least one end surface (12) of the both end surfaces (12, 12), An inner periphery (14) and an outer periphery (16) separated by a groove (13);
When the inner ring (14) is assembled, the inner ring (20) is distorted toward the groove (13) by pushing the inner ring (11) against the outer ring (21) of the inner ring (20). The self-aligning plain bearing (1), wherein the inner ring (20) is assembled and the distortion is restored to hold the outer peripheral surface (21) of the inner ring (20).

［２］前記溝（１３）は、一続きの輪状に形成されたことを特徴とする［１］に記載の自動調心すべり軸受（１）。 [2] The self-aligning plain bearing (1) according to [1], wherein the groove (13) is formed in a continuous ring shape.

［３］前記外輪（１０）の内周部（１４）の周縁は、前記内輪（２０）の外周面（２１）の径よりも小さく、前記内輪（２０）の端面（２２）の径よりも大きい径を有する内輪導入面（１８）が前記内周面（１１）に続いて形成されたことを特徴とする［１］または［２］に記載の自動調心すべり軸受（１）。 [3] The peripheral edge of the inner peripheral portion (14) of the outer ring (10) is smaller than the diameter of the outer peripheral surface (21) of the inner ring (20) and is smaller than the diameter of the end surface (22) of the inner ring (20). The self-aligning plain bearing (1) according to [1] or [2], wherein an inner ring introduction surface (18) having a large diameter is formed following the inner peripheral surface (11).

［４］合成樹脂を射出成形した外輪（１０）の内側に内輪（２０）を円滑に相対回転可能に組み付けた自動調心すべり軸受（１）の外輪（１０）の製造方法において、
両端面（１２，１２）のうち少なくとも一方の端面（１２）で該端面（１２）の円周方向に沿った溝（１３）と、前記溝（１３）によって分けられる内周面（１１）側の内周部（１４）と、外周面（１５）側の外周部（１６）と、を有する外輪（１０）を成形するための金型（３０）に合成樹脂を射出し、
前記射出した合成樹脂が所定温度以下に冷却されたときに、前記内周部（１４）を拡径するように歪めながら前記外輪（１０）を前記金型（３０）から無理抜きすることを特徴とする自動調心すべり軸受（１）の外輪（１０）の製造方法。 [4] In the method of manufacturing the outer ring (10) of the self-aligning plain bearing (1) in which the inner ring (20) is assembled smoothly and relatively rotatably inside the outer ring (10) formed by injection molding a synthetic resin.
The groove (13) along the circumferential direction of the end face (12) at at least one end face (12) of the both end faces (12, 12), and the inner peripheral face (11) side divided by the groove (13) Synthetic resin is injected into a mold (30) for molding an outer ring (10) having an inner peripheral portion (14) of the outer peripheral portion (16) and an outer peripheral portion (16) on the outer peripheral surface (15) side,
When the injected synthetic resin is cooled to a predetermined temperature or less, the outer ring (10) is forcibly removed from the mold (30) while distorting the inner peripheral part (14) to expand its diameter. A method for manufacturing the outer ring (10) of the self-aligning plain bearing (1).

［５］前記金型（３０）は、前記外輪（１０）の内周面（１１）の周縁に前記内輪（２０）の外周面（２１）の径よりも小さく、前記内輪（２０）の端面（２２）の径よりも大きい径を有する内輪導入面（１８）を形成するための内輪導入面形成部（３８）を有することを特徴とする［４］に記載の自動調心すべり軸受（１）の外輪（１０）の製造方法。 [5] The mold (30) is smaller than the diameter of the outer peripheral surface (21) of the inner ring (20) at the periphery of the inner peripheral surface (11) of the outer ring (10), and the end surface of the inner ring (20). The self-aligning plain bearing (1) according to [4], including an inner ring introduction surface forming portion (38) for forming an inner ring introduction surface (18) having a diameter larger than the diameter of (22). ) Of the outer ring (10).

前記本発明は次のように作用する。
自動調心すべり軸受（１）の外輪（１０）は、合成樹脂を射出成形することによって製造される。この射出成形に使用する金型（３０）は、外輪（１０）の両端面（１２，１２）のうち少なくとも一方の端面（１２）で該端面（１２）の円周方向に沿った溝（１３）と、この溝（１３）によって分けられる内周面（１１）側の内周部（１４）と、外周面（１５）側の外周部（１６）と、を形成するための形状を有している。 The present invention operates as follows.
The outer ring (10) of the self-aligning plain bearing (1) is manufactured by injection molding a synthetic resin. The mold (30) used for this injection molding has a groove (13) along the circumferential direction of the end surface (12) at at least one end surface (12) of the both end surfaces (12, 12) of the outer ring (10). ) And an inner peripheral portion (14) on the inner peripheral surface (11) side divided by the groove (13) and an outer peripheral portion (16) on the outer peripheral surface (15) side. ing.

この金型（３０）内に射出した合成樹脂が所定温度以下に冷却されて外輪（１０）が形成された後に、外輪（１０）を金型（３０）からはずす。金型（３０）は、外輪（１０）の内周面（１１）を形成する中央部（３９）の径が外輪（１０）の端面（１２）の内径よりも大きい。このため、外輪（１０）を金型（３０）から抜き取る際に金型（３０）の中央部（３９）が外輪（１０）の端面（１２）につっかえることになる。しかし、中央部（３９）が外輪（１０）の内周面（１１）を押すとともに溝形成部（３３）が中央部（３９）とともに動くので、溝形成部（３３）および中央部（３９）と内周部形成空間（３４）に形成された内周部（１４）との間に隙間ができて、内周部（１４）は拡径するように歪む。これにより、外輪（１０）は金型（３０）から容易に無理抜きすることができる。   After the synthetic resin injected into the mold (30) is cooled below a predetermined temperature to form the outer ring (10), the outer ring (10) is removed from the mold (30). As for a metal mold | die (30), the diameter of the center part (39) which forms the inner peripheral surface (11) of an outer ring | wheel (10) is larger than the internal diameter of the end surface (12) of an outer ring | wheel (10). For this reason, when the outer ring (10) is extracted from the mold (30), the central portion (39) of the mold (30) is replaced with the end face (12) of the outer ring (10). However, since the central portion (39) pushes the inner peripheral surface (11) of the outer ring (10) and the groove forming portion (33) moves together with the central portion (39), the groove forming portion (33) and the central portion (39) And an inner peripheral part (14) formed in the inner peripheral part forming space (34), a gap is formed, and the inner peripheral part (14) is distorted so as to expand its diameter. Thereby, an outer ring | wheel (10) can be easily extracted from a metal mold | die (30) easily.

このようにして製造した外輪（１０）に内輪（２０）を組み付けるときは、外輪（１０）の端面（１２）から外輪（１０）の内側に内輪（２０）を押し込むようにする。外輪（１０）の端面（１２）には円周方向に沿った溝（１３）が形成されているので、外輪（１０）の内周面（１１）の周縁が内輪（２０）の外周面（２１）に押されて、外輪（１０）の内周部（１４）が溝（１３）側に外周部（１６）に向かって拡径するように歪む。これにより、内輪（２０）を外輪（１０）の内側に容易に組み付けることができる。   When the inner ring (20) is assembled to the outer ring (10) thus manufactured, the inner ring (20) is pushed into the inner side of the outer ring (10) from the end surface (12) of the outer ring (10). Since the end surface (12) of the outer ring (10) is formed with a groove (13) along the circumferential direction, the peripheral edge of the inner peripheral surface (11) of the outer ring (10) is the outer peripheral surface of the inner ring (20) ( 21), the inner ring part (14) of the outer ring (10) is distorted so as to increase in diameter toward the groove (13) toward the outer ring part (16). Thereby, an inner ring | wheel (20) can be easily assembled | attached inside an outer ring | wheel (10).

内輪（２０）が完全に外輪（１０）の内側に組み付けられると、内周部（１４）の歪みが復元して外輪（１０）の内周面（１１）が内輪（２０）の外周面（２１）を包むように保持する。これにより自動調心すべり軸受（１）は、外輪（１０）と内輪（２０）とが円滑に摺接しながら相対回転することができる。   When the inner ring (20) is completely assembled inside the outer ring (10), the distortion of the inner peripheral part (14) is restored and the inner peripheral surface (11) of the outer ring (10) becomes the outer peripheral surface of the inner ring (20) ( 21) is held as wrapped. Thus, the self-aligning plain bearing (1) can relatively rotate while the outer ring (10) and the inner ring (20) are in sliding contact smoothly.

外輪（１０）の端面（１２）に形成した溝（１３）が一続きの輪状である場合には、外輪（１０）の内周部（１４）はどこでも外周部（１６）側に歪むので、外輪（１０）への内輪（２０）の組み付けが一層に容易になる。   When the groove (13) formed in the end surface (12) of the outer ring (10) is a continuous ring shape, the inner peripheral part (14) of the outer ring (10) is distorted everywhere on the outer peripheral part (16) side, Assembling of the inner ring (20) to the outer ring (10) is further facilitated.

外輪（１０）が内周部（１４）の周縁に内輪導入面（１８）を有するものの場合には、内輪導入面（１８）の径は内輪（２０）の外周面（２１）の径よりも小さく、内輪（２０）の端面（２２）の径よりも大きいので、内輪（２０）を組み付ける際に内輪（２０）を組み付け易い方向に外輪（１０）の内周部（１４）を歪ませるように内輪（２０）を導くことができる。これにより、内輪（２０）の組み付けがさらに容易になる。   When the outer ring (10) has an inner ring introduction surface (18) at the periphery of the inner peripheral part (14), the diameter of the inner ring introduction surface (18) is larger than the diameter of the outer peripheral surface (21) of the inner ring (20). Since it is small and larger than the diameter of the end face (22) of the inner ring (20), when assembling the inner ring (20), the inner peripheral part (14) of the outer ring (10) is distorted in a direction in which the inner ring (20) can be easily assembled. The inner ring (20) can be guided to Thereby, the assembly | attachment of an inner ring | wheel (20) becomes still easier.

本発明にかかる自動調心すべり軸受によれば、合成樹脂の外輪は、両端面のうち少なくとも一方の端面に該端面の円周方向に沿って形成された溝を有し、該溝によって分けられた内周部は、内輪を組み付ける際に内周面を内輪の外周面に押されて歪むので、内輪を容易に組み付けることができる。また、内周部が歪むことにより、射出成形によって製造する際に金型から抜き取ることが容易となる。   According to the self-aligning plain bearing according to the present invention, the outer ring of the synthetic resin has grooves formed along the circumferential direction of the end face on at least one end face of both end faces, and is divided by the groove. Further, when the inner ring is assembled, the inner ring is pushed and distorted by the outer circumference of the inner ring, so that the inner ring can be easily assembled. Further, since the inner peripheral portion is distorted, it is easy to remove from the mold when manufacturing by injection molding.

また、本発明にかかる自動調心すべり軸受によれば、外輪の端面に形成した溝が一続きの輪状になっているので、内輪は、外輪の内周面のどこの周縁からでも容易に組み付けることができる。   Further, according to the self-aligning plain bearing according to the present invention, since the groove formed on the end surface of the outer ring has a continuous ring shape, the inner ring can be easily assembled from any peripheral edge of the inner peripheral surface of the outer ring. be able to.

さらに、外輪の内周部の周縁に内周面に続いて形成された内輪導入面は、内輪の外周面の径よりも小さく、内輪の端面の径よりも大きい径を有するので、内輪を組み付ける際に内輪を組み付け易い方向に外輪の内周部を歪ませるように内輪を導けるので、内輪の組み付けを一層容易にすることができる。   Further, the inner ring introduction surface formed following the inner peripheral surface at the peripheral edge of the inner peripheral portion of the outer ring has a diameter smaller than the diameter of the outer peripheral surface of the inner ring and larger than the diameter of the end surface of the inner ring. At this time, since the inner ring can be guided so as to distort the inner peripheral portion of the outer ring in a direction in which the inner ring can be easily assembled, the assembly of the inner ring can be further facilitated.

本発明にかかる自動調心すべり軸受の外輪の製造方法によれば、金型に合成樹脂を射出することによって両端面のうち少なくとも一方の端面で該端面の円周方向に沿った溝と、該溝によって分けられる内周面側の内周部と外周面側の外周部とが成形され、射出した合成樹脂が所定温度以下に冷却されたときに外輪を金型から無理抜きする際に、金型の一部によって内周面を押された内周部が溝に向かって外周部側に拡径するように歪むので外輪を容易に無理抜きすることができ、もって、外輪の製造が容易になる。   According to the manufacturing method of the outer ring of the self-aligning plain bearing according to the present invention, the groove along the circumferential direction of the end surface at least one end surface of the both end surfaces by injecting synthetic resin into the mold, When the inner peripheral part on the inner peripheral surface side divided by the groove and the outer peripheral part on the outer peripheral surface side are molded and the injected synthetic resin is cooled below a predetermined temperature, the outer ring is forcibly removed from the mold. Since the inner peripheral portion whose inner peripheral surface is pressed by a part of the mold is distorted so that the diameter increases toward the outer peripheral portion toward the groove, the outer ring can be easily forcibly removed, and thus the outer ring can be easily manufactured. Become.

以下、図面に基づき本発明の好適な一実施の形態を説明する。
図１から図３は本発明の一実施の形態を示している。
図１は、本実施の形態にかかる自動調心すべり軸受の縦断面図である。図２は、図１の自動調心すべり軸受の外輪の縦断面図であり、図３は、図１の自動調心すべり軸受の内輪の縦断面図である。 Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the present invention.
FIG. 1 is a longitudinal sectional view of a self-aligning plain bearing according to the present embodiment. 2 is a longitudinal sectional view of the outer ring of the self-aligning slide bearing of FIG. 1, and FIG. 3 is a longitudinal sectional view of the inner ring of the self-aligning sliding bearing of FIG.

自動調心すべり軸受１は、外輪１０の内側に内輪２０を組み付けた構成を有している。外輪１０の内側には、球面状の内周面１１が形成されている。一方、内輪２０には、球面状の外周面２１が形成されている。外輪１０の内周面１１の球面半径と内輪２０の外周面２１の球面半径とは、ほとんど同一であるが、内周面１１の球面半径よりも外周面２１の球面半径の方が僅かに小さい。この外輪１０に組み付けられた内輪２０は、その外周面２１を外輪１０の内周面１１によって保持される。内周面１１と外周面２１とは滑らかであり、この状態で外輪１０と内輪２０とは円滑に摺接しながら相対回転することができる。相対回転に際しては、相対的な回転方向によっては回転量が制限される。これにより、自動調心すべり軸受１は動作中に自動的に調心される。   The self-aligning plain bearing 1 has a configuration in which an inner ring 20 is assembled inside an outer ring 10. A spherical inner peripheral surface 11 is formed inside the outer ring 10. On the other hand, a spherical outer peripheral surface 21 is formed on the inner ring 20. The spherical radius of the inner peripheral surface 11 of the outer ring 10 and the spherical radius of the outer peripheral surface 21 of the inner ring 20 are almost the same, but the spherical radius of the outer peripheral surface 21 is slightly smaller than the spherical radius of the inner peripheral surface 11. . The inner ring 20 assembled to the outer ring 10 has an outer peripheral surface 21 held by the inner peripheral surface 11 of the outer ring 10. The inner circumferential surface 11 and the outer circumferential surface 21 are smooth, and in this state, the outer ring 10 and the inner ring 20 can rotate relative to each other while smoothly sliding. During relative rotation, the amount of rotation is limited depending on the relative rotation direction. Thereby, the self-aligning plain bearing 1 is automatically aligned during operation.

内輪２０は、両端面２２，２２の中心部を貫通する開口２３を有するドーナツ形に形成されている。この内輪２０の素材は、合成樹脂でもよいし、金属でもよい。   The inner ring 20 is formed in a donut shape having an opening 23 that penetrates the center of both end faces 22 and 22. The material of the inner ring 20 may be a synthetic resin or a metal.

外輪１０は、合成樹脂を射出成形して製造したものである。外輪１０も、両端面１２，１２の中心部を貫通する開口１９を有するドーナツ形に形成されている。外輪の端面１２，１２には、それぞれの端面１２，１２の円周方向に沿って溝１３，１３が形成されている。この溝１３，１３は、一続きの輪状に形成されており、それぞれ外輪１０の両端面１２，１２から外輪１０の厚み方向に向かって略１／３の所まで達している。したがって、溝１３と溝１３との間には、外輪１０の厚みの略１／３程度の厚みの連続部１７が内周面１１側と外周面１５側との間に連続している。なお、図示した溝１３の深さが外輪１０の厚みの略１／３であることは単なる例示であり、これよりも浅くても深くても良い。   The outer ring 10 is manufactured by injection molding a synthetic resin. The outer ring 10 is also formed in a donut shape having an opening 19 that passes through the center of both end faces 12 and 12. Grooves 13 and 13 are formed in the end faces 12 and 12 of the outer ring along the circumferential direction of the respective end faces 12 and 12. The grooves 13 and 13 are formed in a continuous ring shape, and reach from the both end faces 12 and 12 of the outer ring 10 to approximately one third in the thickness direction of the outer ring 10. Therefore, a continuous portion 17 having a thickness of about ３ of the thickness of the outer ring 10 is continuous between the groove 13 and the groove 13 between the inner peripheral surface 11 side and the outer peripheral surface 15 side. Note that the depth of the groove 13 shown in the figure is only about 1/3 of the thickness of the outer ring 10, which is merely an example, and may be shallower or deeper than this.

また、溝１３，１３の幅は、深くなるにしたがって狭くなっている。このような溝１３，１３は、図示したように外輪１０の両端面１２，１２に形成してもよいし、一方の端面１２だけに形成してもよい。   Further, the widths of the grooves 13 and 13 become narrower as they become deeper. Such grooves 13, 13 may be formed on both end faces 12, 12 of the outer ring 10 as shown, or may be formed only on one end face 12.

溝１３は、外輪１０を内周面１１側の内周部１４と外周面１５側の外周部１６とに分けている。内周部１４は、溝１３側の面が球面状に形成されている。   The groove 13 divides the outer ring 10 into an inner peripheral portion 14 on the inner peripheral surface 11 side and an outer peripheral portion 16 on the outer peripheral surface 15 side. The inner peripheral portion 14 has a spherical surface on the groove 13 side.

外輪１０の内周部１４の周縁は、内輪２０の外周面２１の径よりも小さく、内輪２０の端面２２の径よりも大きい径を有する内輪導入面１８が球面に続いて形成されている。このため、内周部１４は、内輪導入面１８の形成されている部分の厚さが周縁に向かって薄くなっている。このように形成された内周部１４は、内周面１１に外力が加わったときに周縁に近くなるほど溝１３側に歪み易くなっている。   An inner ring introduction surface 18 having a diameter smaller than the diameter of the outer peripheral surface 21 of the inner ring 20 and larger than the diameter of the end surface 22 of the inner ring 20 is formed following the spherical surface. For this reason, as for the inner peripheral part 14, the thickness of the part in which the inner ring | wheel introduction surface 18 is formed becomes thin toward the periphery. The inner peripheral portion 14 formed in this manner is more likely to be distorted toward the groove 13 as it is closer to the peripheral edge when an external force is applied to the inner peripheral surface 11.

図４は、外輪を射出成形する金型の内部形状を説明する断面図である。
外輪１０は、金型３０を使用した合成樹脂の射出成形によって製造される。 FIG. 4 is a cross-sectional view illustrating the internal shape of a mold for injection molding the outer ring.
The outer ring 10 is manufactured by injection molding of synthetic resin using a mold 30.

金型３０の内側には、外輪１０の端面１２に溝１３を形成するための溝形成部３３と、溝１３の内側の内周部１４を形成するための内周部形成空間３４と、溝１３の外側の外周部１６を形成するための外周部形成空間３６とが形成されている。内周部形成空間３４は、溝形成部３３と金型３０の中央部３９との間に形成され、外周部形成空間３６は、金型３０の外枠３７と溝形成部３３との間に形成されている。   Inside the mold 30, a groove forming portion 33 for forming the groove 13 in the end surface 12 of the outer ring 10, an inner peripheral portion forming space 34 for forming the inner peripheral portion 14 inside the groove 13, and a groove 13 and an outer peripheral portion forming space 36 for forming the outer peripheral portion 16 outside. The inner peripheral portion forming space 34 is formed between the groove forming portion 33 and the central portion 39 of the mold 30, and the outer peripheral portion forming space 36 is formed between the outer frame 37 of the mold 30 and the groove forming portion 33. Is formed.

金型３０の中央部３９は、内輪２０が組み付けられる外輪１０に内側の空間を形成する。中央部３９は、金型３０の中心から周縁に向かう球面３１を有しており、この球面３１によって内周部１４の内周面１１が形成される。球面３１には、内輪導入面１８を形成するための内輪導入面形成部３８が続いている。   The central portion 39 of the mold 30 forms an inner space in the outer ring 10 to which the inner ring 20 is assembled. The central portion 39 has a spherical surface 31 from the center of the mold 30 toward the peripheral edge, and the spherical surface 31 forms the inner peripheral surface 11 of the inner peripheral portion 14. The spherical surface 31 is followed by an inner ring introduction surface forming portion 38 for forming the inner ring introduction surface 18.

外輪１０の製造方法は、次の２つの工程を有している。
第１工程：両端面１２，１２のうち少なくとも一方の端面１２で該端面１２の円周方向に沿った溝１３と、この溝１３によって分けられる内周面１１側の内周部１４と外周面１５側の外周部１６と、外輪１０の周縁の内輪導入面１８と、を成形するように形成された上記の金型３０内に合成樹脂を射出する。 The manufacturing method of the outer ring 10 includes the following two steps.
1st process: The groove | channel 13 along the circumferential direction of this end surface 12 in the at least one end surface 12 among both end surfaces 12 and 12, the inner peripheral part 14 and outer peripheral surface by the side of the inner peripheral surface 11 divided by this groove 13 The synthetic resin is injected into the mold 30 formed so as to mold the outer peripheral portion 16 on the 15 side and the inner ring introduction surface 18 on the peripheral edge of the outer ring 10.

第２工程：金型３０内に射出した合成樹脂の温度が所定温度以下になった後に、外輪１０を金型３０から無理抜きする。
このようにして、上記のような形状を有する外輪１０を製造することができる。 Second step: After the temperature of the synthetic resin injected into the mold 30 becomes equal to or lower than a predetermined temperature, the outer ring 10 is forcibly removed from the mold 30.
Thus, the outer ring | wheel 10 which has the above shapes can be manufactured.

次に作用を説明する。
金型３０内に射出した合成樹脂が所定温度以下に冷却されて外輪１０が形成された後に、外輪１０を金型３０から抜くようにしてはずすときは、中央部３９の径が外輪１０の端面１２の内径よりも大きいので、中央部３９が外輪１０の端面１２につっかえてしまう。しかし、中央部３９が外輪１０の内周面１１を押すとともに溝形成部３３が中央部３９とともに動くので、溝形成部３３および中央部３９と内周部形成空間３４に形成された内周部１４との間に隙間ができて、内周部１４が溝１３側へ拡径するように歪む。これにより、外輪１０を金型３０から容易に無理抜きすることができる。 Next, the operation will be described.
When the outer ring 10 is removed after the synthetic resin injected into the mold 30 is cooled to a predetermined temperature or less and then removed from the mold 30, the diameter of the central portion 39 is the end face of the outer ring 10. Since the inner diameter of the outer ring 10 is larger than the inner diameter of the outer ring 10, the central part 39 is replaced with the end face 12 of the outer ring 10. However, since the central part 39 pushes the inner peripheral surface 11 of the outer ring 10 and the groove forming part 33 moves together with the central part 39, the inner peripheral part formed in the groove forming part 33 and the central part 39 and the inner peripheral part forming space 34 A gap is formed between the inner peripheral portion 14 and the inner peripheral portion 14 is distorted so as to expand toward the groove 13 side. Thereby, the outer ring | wheel 10 can be easily extracted from the metal mold | die 30 easily.

外輪１０に内輪２０を組み付けるときは、外輪１０の端面１２から外輪１０の内側に内輪２０を押し込むようにすればよい。内輪２０の端面２２を外輪１０の端面１２に平行になるようにして押し当てると、外輪１０の内輪導入面１８が外周面２１の端面２２付近を受ける。内輪導入面１８の径は、内輪２０の外周面２１の径よりも小さく、内輪２０の端面２２の径よりも大きいので、内輪２０は、外周面２１の端面２２付近が容易に内輪導入面１８に収まるように内輪２０を導くことができる。同時に、内輪導入面１８は、内輪２０を組み付ける際に内輪２０を組み付け易い方向に外輪１０の内周部１４を歪ませるように内輪２０を導くことができる。   When the inner ring 20 is assembled to the outer ring 10, the inner ring 20 may be pushed into the inner side of the outer ring 10 from the end surface 12 of the outer ring 10. When the end surface 22 of the inner ring 20 is pressed so as to be parallel to the end surface 12 of the outer ring 10, the inner ring introduction surface 18 of the outer ring 10 receives the vicinity of the end surface 22 of the outer peripheral surface 21. Since the diameter of the inner ring introduction surface 18 is smaller than the diameter of the outer peripheral surface 21 of the inner ring 20 and larger than the diameter of the end surface 22 of the inner ring 20, the inner ring 20 is easily located near the end surface 22 of the outer ring surface 21. The inner ring 20 can be guided so as to be within the range. At the same time, the inner ring introduction surface 18 can guide the inner ring 20 so as to distort the inner peripheral portion 14 of the outer ring 10 in a direction in which the inner ring 20 is easily assembled when the inner ring 20 is assembled.

内輪２０を外輪１０の内側に向けて押し込むように力を加えると、外輪１０の内周面１１の周縁が内輪２０の外周面２１に押される。外輪１０の内周部１４の厚さは、内輪導入面１８の周縁に向かうほど薄くなっているので、内輪２０の外周面２１に押された内周部１４は、溝１３側に外周部１６に向かって拡径するように歪む。これにより、内輪２０を外輪１０の内側に容易に組み付けることができる。   When a force is applied so as to push the inner ring 20 toward the inside of the outer ring 10, the peripheral edge of the inner peripheral surface 11 of the outer ring 10 is pressed by the outer peripheral surface 21 of the inner ring 20. Since the thickness of the inner peripheral portion 14 of the outer ring 10 becomes thinner toward the peripheral edge of the inner ring introduction surface 18, the inner peripheral portion 14 pushed by the outer peripheral surface 21 of the inner ring 20 has an outer peripheral portion 16 on the groove 13 side. It is distorted so as to expand its diameter. Thereby, the inner ring 20 can be easily assembled inside the outer ring 10.

内輪２０が完全に外輪１０の内側に組み付けられると、内輪２０の外周面２１の径は外輪１０の内周面１１の径よりも僅かに小さいので、外周面２１が内周面１１を溝１３側に押すことが無くなる。これにより、内周部１４の歪みが復元して外輪１０の内周面１１が内輪２０の外周面２１を包むように保持する。これにより自動調心すべり軸受１は、外輪１０と内輪２０とが円滑に摺接しながら相対回転することができる。   When the inner ring 20 is completely assembled inside the outer ring 10, the diameter of the outer peripheral surface 21 of the inner ring 20 is slightly smaller than the diameter of the inner peripheral surface 11 of the outer ring 10. No longer pushing to the side. Thereby, the distortion of the inner peripheral portion 14 is restored, and the inner peripheral surface 11 of the outer ring 10 is held so as to wrap the outer peripheral surface 21 of the inner ring 20. As a result, the self-aligning plain bearing 1 can relatively rotate while the outer ring 10 and the inner ring 20 are in sliding contact with each other smoothly.

内輪２０を外輪１０に組み付ける際、上記のように内輪２０の端面２２を外輪１０の端面１２に平行となるようにして内輪２０を外輪１０の内側に押し込んでも良いし、端面２２を端面１２に対して傾けて押し込んでもよい。この場合、溝１３が一続きの輪状に形成されている場合には、外輪１０の内周部１４はどこでも外周部１６側に歪むので、外輪１０への内輪２０の組み付けが容易である。   When the inner ring 20 is assembled to the outer ring 10, the inner ring 20 may be pushed into the inner surface of the outer ring 10 with the end surface 22 of the inner ring 20 being parallel to the end surface 12 of the outer ring 10 as described above. You may incline and push in. In this case, when the groove 13 is formed in a continuous ring shape, the inner ring portion 14 of the outer ring 10 is distorted to the outer ring portion 16 side everywhere, so that the inner ring 20 can be easily assembled to the outer ring 10.

前記実施の形態においては、溝１３が一続きの輪状に形成されているものとしたが、輪状の一部が途切れたように形成してもよい。   In the embodiment, the groove 13 is formed in a continuous ring shape, but may be formed so that a part of the ring shape is interrupted.

本発明の一実施の形態に係る自動調心すべり軸受を示す縦断面図である。It is a longitudinal cross-sectional view which shows the self-aligning plain bearing which concerns on one embodiment of this invention. 本発明の一実施の形態に係る自動調心すべり軸受の外輪を示す縦断面図である。It is a longitudinal cross-sectional view which shows the outer ring | wheel of the self-aligning slide bearing which concerns on one embodiment of this invention. 本発明の一実施の形態に係る自動調心すべり軸受の内輪を示す縦断面図である。It is a longitudinal cross-sectional view which shows the inner ring | wheel of the self-aligning slide bearing which concerns on one embodiment of this invention. 図２の外輪を射出成形する金型の内部形状を説明する断面図である。It is sectional drawing explaining the internal shape of the metal mold | die which carries out the injection molding of the outer ring | wheel of FIG.

符号の説明Explanation of symbols

１…自動調心すべり軸受
１０…外輪
１１…内周面
１２…端面
１３…溝
１４…内周部
１５…外周面
１６…外周部
１７…連続部
１８…内輪導入面
１９…開口
２０…内輪
２１…外周面
２２…端面
２３…開口
３０…金型
３１…球面
３３…溝形成部
３４…内周部形成空間
３６…外周部形成空間
３７…外枠
３８…内輪導入面形成部
３９…中央部 DESCRIPTION OF SYMBOLS 1 ... Self-aligning plain bearing 10 ... Outer ring 11 ... Inner peripheral surface 12 ... End surface 13 ... Groove 14 ... Inner peripheral part 15 ... Outer peripheral face 16 ... Outer peripheral part 17 ... Continuous part 18 ... Inner ring introduction surface 19 ... Opening 20 ... Inner ring 21 ... outer peripheral surface 22 ... end face 23 ... opening 30 ... mold 31 ... spherical surface 33 ... groove forming portion 34 ... inner peripheral portion forming space 36 ... outer peripheral portion forming space 37 ... outer frame 38 ... inner ring introduction surface forming portion 39 ... central portion

Claims (5)

球面状の内周面を有する外輪の内側に、該内周面に摺接する球面状の外周面を有する内輪を組み付けてなり、前記外輪と内輪とを円滑に相対回転可能とした自動調心すべり軸受において、
前記外輪は合成樹脂であり、両端面のうち少なくとも一方の端面に該端面の円周方向に沿って形成された溝と、該溝によって分けられた内周部および外周部とを備え、
前記内周部は、前記内輪を組み付ける際に前記内周面を前記内輪の外周面に押されて前記溝側に歪み、前記内輪が組み付けられた状態では、前記歪みが復元して前記内輪の外周面を保持することを特徴とする自動調心すべり軸受。 A self-aligning slide in which an inner ring having a spherical outer peripheral surface that is in sliding contact with the inner peripheral surface is assembled inside an outer ring having a spherical inner peripheral surface, and the outer ring and the inner ring can be smoothly rotated relative to each other. In the bearing
The outer ring is a synthetic resin, and includes a groove formed on at least one end face of both end faces along the circumferential direction of the end face, and an inner peripheral portion and an outer peripheral portion divided by the groove,
When the inner ring is assembled, the inner ring is deformed to the groove side by pushing the inner circumferential surface against the outer circumferential surface of the inner ring, and in the state where the inner ring is assembled, the distortion is restored and the inner ring Self-aligning plain bearing characterized by holding the outer peripheral surface. 前記溝は、一続きの輪状に形成されたことを特徴とする請求項１に記載の自動調心すべり軸受。   The self-aligning plain bearing according to claim 1, wherein the groove is formed in a continuous ring shape. 前記外輪の内周部の周縁は、前記内輪の外周面の径よりも小さく、前記内輪の端面の径よりも大きい径を有する内輪導入面が前記内周面に続いて形成されたことを特徴とする請求項１または２に記載の自動調心すべり軸受。   An inner ring introduction surface having a diameter smaller than a diameter of an outer peripheral surface of the inner ring and larger than a diameter of an end surface of the inner ring is formed following the inner peripheral surface. The self-aligning plain bearing according to claim 1 or 2. 合成樹脂を射出成形した外輪の内側に内輪を円滑に相対回転可能に組み付けた自動調心すべり軸受の外輪の製造方法において、
両端面のうち少なくとも一方の端面で該端面の円周方向に沿った溝と、前記溝によって分けられる内周面側の内周部と、外周面側の外周部と、を有する外輪を成形するための金型に合成樹脂を射出し、
前記射出した合成樹脂が所定温度以下に冷却されたときに、前記内周部を拡径するように歪めながら前記外輪を前記金型から無理抜きすることを特徴とする自動調心すべり軸受の外輪の製造方法。 In the manufacturing method of the outer ring of the self-aligning slide bearing in which the inner ring is assembled so that the inner ring can be smoothly rotated relative to the inner side of the outer ring formed by injection molding synthetic resin.
An outer ring having a groove along the circumferential direction of the end face, an inner peripheral part on the inner peripheral face side divided by the groove, and an outer peripheral part on the outer peripheral face side is formed on at least one end face of both end faces. Injecting synthetic resin into the mold for
An outer ring of a self-aligning slide bearing, wherein when the injected synthetic resin is cooled to a predetermined temperature or less, the outer ring is forcibly removed from the mold while being distorted so as to expand the inner peripheral portion. Manufacturing method. 前記金型は、前記外輪の内周面の周縁に前記内輪の外周面の径よりも小さく、前記内輪の端面の径よりも大きい径を有する内輪導入面を形成するための内輪導入面形成部を有することを特徴とする請求項４に記載の自動調心すべり軸受の外輪の製造方法。   The mold has an inner ring introduction surface forming portion for forming an inner ring introduction surface having a diameter smaller than a diameter of the outer circumferential surface of the inner ring and larger than a diameter of an end surface of the inner ring at a peripheral edge of the inner circumferential surface of the outer ring. The manufacturing method of the outer ring | wheel of the self-aligning slide bearing of Claim 4 characterized by the above-mentioned.
JP2005293931A 2005-10-06 2005-10-06 Self-aligning slide bearing and its outer ring manufacturing method Pending JP2007100905A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010270842A (en) * 2009-05-22 2010-12-02 Ntn Corp Spherical slide bearing
CN102401008A (en) * 2011-07-08 2012-04-04 中国航空动力机械研究所 Self-lubricating joint bearing, positioning device and positioning method thereof
WO2012117938A1 (en) * 2011-03-01 2012-09-07 Ntn株式会社 Sliding bearing
JP2013079714A (en) * 2011-09-22 2013-05-02 Ntn Corp Sliding bearing and image forming device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010270842A (en) * 2009-05-22 2010-12-02 Ntn Corp Spherical slide bearing
WO2012117938A1 (en) * 2011-03-01 2012-09-07 Ntn株式会社 Sliding bearing
CN103403376A (en) * 2011-03-01 2013-11-20 Ntn株式会社 Sliding bearing
US8998495B2 (en) 2011-03-01 2015-04-07 Ntn Corporation Sliding bearing
CN102401008A (en) * 2011-07-08 2012-04-04 中国航空动力机械研究所 Self-lubricating joint bearing, positioning device and positioning method thereof
JP2013079714A (en) * 2011-09-22 2013-05-02 Ntn Corp Sliding bearing and image forming device

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