JP2014159861A - Slide bearing and manufacturing method of slide bearing - Google Patents

Slide bearing and manufacturing method of slide bearing Download PDF

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JP2014159861A
JP2014159861A JP2013031473A JP2013031473A JP2014159861A JP 2014159861 A JP2014159861 A JP 2014159861A JP 2013031473 A JP2013031473 A JP 2013031473A JP 2013031473 A JP2013031473 A JP 2013031473A JP 2014159861 A JP2014159861 A JP 2014159861A
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solid lubricant
coated
bearing
slide bearing
inner peripheral
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JP6390038B2 (en
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Katsuhiro Ashihara
克宏 芦原
Yuichiro Kajiki
悠一朗 梶木
Hiroki Takata
裕紀 高田
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Taiho Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a slide bearing that does not need securement of a cutting process and can shorten a manufacturing process by eliminating cutting tool replacement of a cutter or the like, and provide a manufacturing method of the slide bearing.SOLUTION: In a slide bearing 1, two halved members 2, 2 into which a cylinder is divided in parallel with an axial direction are vertically arranged. In the axial end part of the lower side halved member 2, a slender part provided in a circumferential direction is removed from a rotational direction downstream side mating surface to a predetermined bearing angle, and by coating with solid lubricant 2a, a thin groove 3 is formed at a part that is not coated with the solid lubricant 2a.

Description

本発明は、すべり軸受、及び、すべり軸受の製造方法の技術に関し、円筒を軸方向と平行に二分割した半割部材を上下に配置したすべり軸受を製造する技術に関する。   The present invention relates to a slide bearing and a technology for manufacturing a slide bearing, and more particularly to a technology for manufacturing a slide bearing in which a half member in which a cylinder is divided into two in parallel with an axial direction is arranged vertically.

従来、エンジンのクランクシャフトを軸支するための軸受であって、円筒形状を二分割した二つの部材を合わせる半割れ構造のすべり軸受が公知となっている。また、すべり軸受の摺動面積を減らし、フリクション低減効果を得るために、すべり軸受の幅を狭くする構造がある。しかし、すべり軸受の幅を狭くすると、流出油量が増加していた。そこで、すべり軸受の軸方向両端部に、全周に逃げ部分（細溝）を形成した構成が公知となっている（例えば、特許文献１参照）。   2. Description of the Related Art Conventionally, a bearing for supporting an engine crankshaft and having a half crack structure in which two members divided into two cylindrical shapes are combined is known. Further, there is a structure in which the width of the sliding bearing is narrowed in order to reduce the sliding area of the sliding bearing and obtain a friction reducing effect. However, when the width of the slide bearing was narrowed, the amount of oil spilled increased. Therefore, a configuration in which relief portions (thin grooves) are formed on the entire circumference at both ends in the axial direction of the slide bearing is known (for example, see Patent Document 1).

特表２００３−５３２０３６号公報Japanese translation of PCT publication No. 2003-532036

従来技術の如く、すべり軸受の軸方向両端部に逃げ部分（細溝）を形成する場合、切削カッター等を用いて加工を行う場合がある。しかし、上記の如くすべり軸受を切削加工する場合は、切削工程を確保する必要があり、また、切削カッターの刃具交換等に時間がかかるため、すべり軸受の製造工程増加の原因となっていた。   When the relief portions (thin grooves) are formed at both ends in the axial direction of the slide bearing as in the prior art, processing may be performed using a cutting cutter or the like. However, when the sliding bearing is cut as described above, it is necessary to secure the cutting process, and it takes time to replace the cutting tool of the cutting cutter, which causes an increase in the manufacturing process of the sliding bearing.

そこで、本発明は係る課題に鑑み、切削工程を確保する必要がなく、また、切削カッターの刃具交換等を不要とすることにより、製造工程を短縮することが可能となる、すべり軸受、及び、すべり軸受の製造方法を提供する。   Then, in view of the subject which this invention concerns, it is not necessary to ensure a cutting process, and it becomes possible to shorten a manufacturing process by making the cutting tool exchange etc. of a cutting cutter unnecessary, and a slide bearing, and A method for manufacturing a plain bearing is provided.

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。   The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

即ち、請求項１においては、円筒を軸方向と平行に二分割した半割部材を上下に配置し、前記上下の半割部材の内周面を固体潤滑剤でコーティングしたすべり軸受であって、前記下側の半割部材の軸方向端部に回転方向下流側合わせ面から所定の軸受角度まで円周方向に設けた細長部を除いて、前記固体潤滑剤でコーティングすることにより、前記固体潤滑剤でコーティングされていない部分に溝を形成したものである。   That is, in claim 1, a sliding bearing in which a half member divided into two parallel to the axial direction of a cylinder is vertically arranged, and an inner peripheral surface of the upper and lower half members is coated with a solid lubricant, The solid lubricant is coated with the solid lubricant except for the elongated portion provided in the circumferential direction from the mating surface on the downstream side in the rotation direction to the predetermined bearing angle at the axial end of the lower half member. A groove is formed in a portion not coated with the agent.

請求項２においては、前記上下の半割部材の内周面を固体潤滑剤でコーティングする前に、前記下側の半割部材の軸方向端部に、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細長形状のマスキング部材を配置し、前記上下の半割部材の内周面を固体潤滑剤でコーティングした後に、前記マスキング部材を取除くことにより、前記固体潤滑剤でコーティングされていない部分に溝を形成したものである。   In claim 2, before coating the inner peripheral surfaces of the upper and lower halved members with a solid lubricant, a predetermined bearing is provided on the axial end portion of the lower halved member from the downstream facing surface in the rotational direction. An elongated masking member is arranged in the circumferential direction up to an angle, and the inner peripheral surfaces of the upper and lower halved members are coated with a solid lubricant, and then the masking member is removed, thereby being coated with the solid lubricant. Grooves are formed in the unexposed portions.

請求項３においては、円筒を軸方向と平行に二分割した半割部材を上下に配置し、前記上下の半割部材の内周面を固体潤滑剤でコーティングしたすべり軸受の製造方法であって、前記下側の半割部材の軸方向端部において、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細長形状のマスキング部材を配置する、マスキング工程と、前記上下の半割部材の内周面を固体潤滑剤でコーティングする、コーティング工程と、前記マスキング部材を取除くことにより、前記固体潤滑剤でコーティングされていない部分に溝を形成する、溝製造工程と、を備えるものである。   According to a third aspect of the present invention, there is provided a sliding bearing manufacturing method in which a halved member obtained by dividing a cylinder into two in parallel with an axial direction is disposed above and below, and an inner peripheral surface of the upper and lower halved members is coated with a solid lubricant. A masking step in which an elongated masking member is arranged in a circumferential direction from a downstream mating surface in a rotational direction to a predetermined bearing angle at an axial end portion of the lower half member, and the upper and lower half members A coating step of coating the inner peripheral surface of the substrate with a solid lubricant, and a groove manufacturing step of forming a groove in a portion not coated with the solid lubricant by removing the masking member. is there.

本発明の効果として、以下に示すような効果を奏する。   As effects of the present invention, the following effects can be obtained.

すなわち、すべり軸受の製造において、切削工程を確保する必要がなく、また、切削カッターの刃具交換等を不要とすることにより、製造工程を短縮することが可能となる。   That is, it is not necessary to secure a cutting process in manufacturing a sliding bearing, and the manufacturing process can be shortened by eliminating the need to replace the cutting cutter blade.

一実施形態に係るすべり軸受を示す正面図。The front view which shows the slide bearing which concerns on one Embodiment. （ａ）一実施形態に係るすべり軸受を構成する半割部材を示す平面図。（ｂ）同じくＡ−Ａ線断面図。（ｃ）同じくＢ−Ｂ線断面図。(A) The top view which shows the half member which comprises the slide bearing which concerns on one Embodiment. (B) Similarly AA sectional view. (C) Similarly, a cross-sectional view along the line BB. （ａ）マスキング工程における半割部材を示す平面図。（ｂ）同じくＣ−Ｃ線断面図。(A) The top view which shows the half member in a masking process. (B) Similarly CC sectional view. （ａ）コーティング工程における半割部材を示す平面図。（ｂ）同じくＤ−Ｄ線断面図。(A) The top view which shows the half member in a coating process. (B) Similarly DD sectional view.

次に、発明の実施の形態を説明する。なお、図１は本発明の一実施形態に係るすべり軸受１の正面図であり、図１における画面の上下方向を軸受１の上下方向、画面の手前方向及び奥方向を軸受１の軸方向（前後方向）、画面の左右方向を軸受１の左右方向とする。   Next, embodiments of the invention will be described. FIG. 1 is a front view of a plain bearing 1 according to an embodiment of the present invention. The vertical direction of the screen in FIG. 1 is the vertical direction of the bearing 1, and the front and back directions of the screen are the axial directions of the bearing 1 ( The horizontal direction of the screen is the horizontal direction of the bearing 1.

まず、すべり軸受１を構成する半割部材２について図１及び図２を用いて説明する。
すべり軸受１は円筒状の部材であり、図１に示すように、エンジンのクランクシャフト１１のすべり軸受構造に適用される。すべり軸受１は、二つの半割部材２・２で構成されている。二つの半割部材２・２は、それぞれが円筒を軸方向と平行に二分割した形状であり、前後方向と直交する平面による断面形状が半円状となるように形成されている。本実施形態においては、半割部材２・２は上下に配置されており、左右に合わせ面が配置されている。クランクシャフト１１をすべり軸受１で軸支する場合、所定の隙間が形成され、この隙間に対し図示せぬ油路から潤滑油が供給される。 First, the half member 2 which comprises the slide bearing 1 is demonstrated using FIG.1 and FIG.2.
The slide bearing 1 is a cylindrical member and is applied to a slide bearing structure of an engine crankshaft 11 as shown in FIG. The plain bearing 1 is composed of two halved members 2 and 2. Each of the two halved members 2 and 2 has a shape obtained by dividing a cylinder into two in parallel to the axial direction, and is formed so that a cross-sectional shape by a plane orthogonal to the front-rear direction is a semicircular shape. In the present embodiment, the half members 2 and 2 are arranged up and down, and mating surfaces are arranged on the left and right. When the crankshaft 11 is pivotally supported by the slide bearing 1, a predetermined gap is formed, and lubricating oil is supplied to the gap from an oil passage (not shown).

図２（ａ）においては、上側および下側の半割部材２を示している。なお、本実施形態においては、クランクシャフト１１の回転方向を図１及び図２（ａ）・（ｂ）の矢印に示すように正面視時計回り方向とする。また、軸受角度は、図２（ｂ）における右端の位置を０度とし、図２（ｂ）において、反時計回り方向を正とする。すなわち、図２（ｂ）において、左端の位置の軸受角度が１８０度となり、下端の位置の軸受角度が２７０度となるように定義する。   In FIG. 2A, the upper and lower half members 2 are shown. In the present embodiment, the rotation direction of the crankshaft 11 is the clockwise direction when viewed from the front as shown by the arrows in FIGS. 1 and 2A and 2B. In addition, the bearing angle is 0 degree at the right end position in FIG. 2B, and the counterclockwise direction in FIG. 2B is positive. That is, in FIG. 2B, the bearing angle at the left end position is defined as 180 degrees and the bearing angle at the lower end position is defined as 270 degrees.

図２（ａ）から（ｃ）に示す如く、すべり軸受１は上下の半割部材２・２の内周面が固体潤滑剤２ａでコーティングされている（図２（ａ）から（ｃ）において網掛けされた部分）。固体潤滑剤２ａはすべり軸受１の内周面における損傷を防止したり、摩擦・摩耗を低減したりするために用いられ、その素材は固体二硫化モリブデン（ＭＯＳ２）やグラファイト等が用いられる。   As shown in FIGS. 2 (a) to (c), in the plain bearing 1, the inner peripheral surfaces of the upper and lower half members 2 and 2 are coated with a solid lubricant 2a (in FIGS. 2 (a) to (c)). Shaded area). The solid lubricant 2a is used for preventing damage on the inner peripheral surface of the slide bearing 1 and reducing friction and wear, and the material thereof is solid molybdenum disulfide (MOS2), graphite or the like.

上側の半割部材２の内周には円周方向に溝が設けられており、中心に円形の孔が設けられている。また、上側の半割部材２の左右に合わせ面が配置されている。図２（ａ）に示す如く、上側の半割部材２の内周面はこの溝以外の部分が固体潤滑剤２ａでコーティングされている。   On the inner periphery of the upper half member 2, a groove is provided in the circumferential direction, and a circular hole is provided in the center. In addition, mating surfaces are arranged on the left and right of the upper half member 2. As shown in FIG. 2A, the inner peripheral surface of the upper half member 2 is coated with a solid lubricant 2a at portions other than the groove.

下側の半割部材２の内周面においては、軸方向端部に回転方向下流側合わせ面（軸受角度が１８０度）から軸受角度が正となる方向（反時計回り方向）に向けて円周方向に設けられた細長部を除いて、固体潤滑剤２ａでコーティングされている。即ち、固体潤滑剤２ａでコーティングされていない部分が、下側の半割部材２の内周面における細溝３として形成されているのである。即ち、本実施形態に係るすべり軸受１は、図２（ｃ）に示すように、半割部材２を固体潤滑剤２ａでコーティングした厚さの合計が軸受の厚さＤとして、固体潤滑剤２ａの厚さが細溝３の深さｄとして、固体潤滑剤２ａでコーティングされていない部分の幅が細溝３の幅Ｗとして、それぞれ形成されているのである。   On the inner peripheral surface of the lower half member 2, the axial end is circular from the downstream-side mating surface (bearing angle is 180 degrees) toward the direction in which the bearing angle is positive (counterclockwise direction). It is coated with the solid lubricant 2a except for the elongated portion provided in the circumferential direction. That is, the portion that is not coated with the solid lubricant 2 a is formed as the narrow groove 3 on the inner peripheral surface of the lower half member 2. That is, in the plain bearing 1 according to the present embodiment, as shown in FIG. 2C, the total thickness obtained by coating the half member 2 with the solid lubricant 2a is the bearing thickness D, and the solid lubricant 2a Is the depth d of the narrow groove 3, and the width of the portion not coated with the solid lubricant 2a is the width W of the narrow groove 3, respectively.

本実施形態においては図２（ａ）に示すように、細溝３はすべり軸受１の軸方向に並列して、軸方向の両側端部に二本設けられている。詳細には、細溝３は、クランクシャフト１１の回転方向下流側合わせ面（軸受角度が１８０度）から軸受角度が正となる方向（反時計回り方向）に向けて円周方向に設けられる。すなわち、下側の半割部材２においては、図２（ｂ）の右側の合わせ面が回転方向上流側合わせ面、図２（ｂ）の左側の合わせ面が回転方向下流側合わせ面となる。   In the present embodiment, as shown in FIG. 2A, two narrow grooves 3 are provided in parallel with the axial direction of the slide bearing 1 at both end portions in the axial direction. Specifically, the narrow groove 3 is provided in the circumferential direction from the mating surface on the downstream side in the rotation direction of the crankshaft 11 (bearing angle is 180 degrees) toward the direction in which the bearing angle is positive (counterclockwise direction). That is, in the lower half member 2, the right mating surface in FIG. 2B is the upstream mating surface in the rotational direction, and the left mating surface in FIG. 2B is the downstream mating surface in the rotational direction.

次に、すべり軸受１を構成する下側の半割部材２の製造方法について、図３及び図４を用いて説明する。
下側の半割部材２の製造方法は、マスキング工程と、コーティング工程と、溝製造工程と、を備える。以下に、各工程について具体的に説明する。 Next, the manufacturing method of the lower half member 2 which comprises the slide bearing 1 is demonstrated using FIG.3 and FIG.4.
The manufacturing method of the lower half member 2 includes a masking process, a coating process, and a groove manufacturing process. Below, each process is demonstrated concretely.

マスキング工程においては図３（ａ）及び（ｂ）に示す如く、下側の半割部材２の軸方向端部において、回転方向下流側合わせ面（軸受角度が１８０度）から軸受角度が正となる方向（反時計回り方向）に向けて、所定の軸受角度まで円周方向に細長形状のマスキング部材３１・３１を配置する。   In the masking step, as shown in FIGS. 3A and 3B, the bearing angle is positive from the rotation direction downstream mating surface (bearing angle is 180 degrees) at the axial end portion of the lower half member 2. The elongated masking members 31 and 31 are arranged in the circumferential direction up to a predetermined bearing angle in a direction (counterclockwise direction).

次に、コーティング工程においては図４（ａ）及び（ｂ）に示す如く、上下の半割部材２・２の内周面を固体潤滑剤２ａ・２ａでコーティングする。この際、下側の半割部材２における内周面のうち、マスキング部材３１・３１を配置した部分は固体潤滑剤２ａでコーティングされない。   Next, in the coating step, as shown in FIGS. 4A and 4B, the inner peripheral surfaces of the upper and lower halved members 2 and 2 are coated with solid lubricants 2a and 2a. At this time, the portion of the inner peripheral surface of the lower half member 2 where the masking members 31 and 31 are arranged is not coated with the solid lubricant 2a.

次に、溝製造工程においては、上下の半割部材２・２の内周面からマスキング部材３１・３１を取除く。これにより、図２（ａ）及び（ｃ）に示す如く、固体潤滑剤２ａでコーティングされていない部分を細溝３・３として形成するのである。   Next, in the groove manufacturing process, the masking members 31 and 31 are removed from the inner peripheral surfaces of the upper and lower halved members 2 and 2. As a result, as shown in FIGS. 2A and 2C, the portions not coated with the solid lubricant 2a are formed as the narrow grooves 3 and 3.

上記の如く、本実施形態に係るすべり軸受１においては、上下の半割部材２・２の内周面を固体潤滑剤２ａ・２ａでコーティングする前に、下側の半割部材２の軸方向端部に、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細長形状のマスキング部材３１・３１を配置する。そして、上下の半割部材２・２の内周面を固体潤滑剤２ａ・２ａでコーティングした後に、マスキング部材３１・３１を取除くのである。これにより、下側の半割部材２の軸方向端部における、固体潤滑剤２ａでコーティングされていない部分に細溝３・３を形成するのである。   As described above, in the plain bearing 1 according to the present embodiment, the axial direction of the lower half member 2 is coated before the inner peripheral surfaces of the upper and lower half members 2 and 2 are coated with the solid lubricants 2a and 2a. Elongated masking members 31 and 31 are arranged at the end portion in the circumferential direction from the mating surface on the downstream side in the rotation direction to a predetermined bearing angle. Then, after the inner peripheral surfaces of the upper and lower halved members 2 and 2 are coated with the solid lubricants 2a and 2a, the masking members 31 and 31 are removed. As a result, the narrow grooves 3 and 3 are formed in the portion not coated with the solid lubricant 2a at the axial end of the lower half member 2.

本実施形態に係るすべり軸受１においては、以上のように、その軸方向端部に、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細溝３を設けている。これにより、油膜圧力の発生を妨げない程度の細溝を設けることで、摺動面積を減らしつつ、フリクション低減効果を得ることができ、かつ、総和の流出油量を抑えることができる。   In the plain bearing 1 according to the present embodiment, as described above, the narrow groove 3 is provided at the axial end portion in the circumferential direction from the mating surface on the downstream side in the rotational direction to a predetermined bearing angle. Thereby, by providing a narrow groove that does not hinder the generation of oil film pressure, it is possible to obtain a friction reduction effect while reducing the sliding area, and to suppress the total amount of oil spilled.

そして、本実施形態に係るすべり軸受１においては、細溝３を形成するにあたり、切削カッター等を使用せず、マスキング部材３１によって固体潤滑剤２ａでコーティングされない部分を利用している。換言すれば、細溝の切削工程に代えて、固体潤滑剤２ａのコーティング工程を用いているのである。即ち、本実施形態によれば、半割部材２を切削する構成と比較して、短い作業時間ですべり軸受１を製造することが可能となる。また、細溝３の形成のために切削カッター等の刃具を用いないため、刃具交換等の時間を不要とすることができる。このように、本実施形態に係るすべり軸受１によれば、その製造工程を短縮することが可能となるのである。   In the plain bearing 1 according to the present embodiment, when forming the narrow groove 3, a cutting cutter or the like is not used and a portion that is not coated with the solid lubricant 2a by the masking member 31 is used. In other words, a solid lubricant 2a coating process is used instead of the narrow groove cutting process. That is, according to the present embodiment, it is possible to manufacture the plain bearing 1 in a shorter work time compared to the configuration in which the half member 2 is cut. In addition, since no cutting tool such as a cutting cutter is used for forming the narrow groove 3, time for exchanging the cutting tool or the like can be eliminated. Thus, according to the slide bearing 1 which concerns on this embodiment, it becomes possible to shorten the manufacturing process.

１ すべり軸受
２ 半割部材
２ａ 固体潤滑剤
３ 細溝
１１ クランクシャフト 1 Sliding bearing 2 Half member 2a Solid lubricant 3 Narrow groove 11 Crankshaft

Claims (3)

円筒を軸方向と平行に二分割した半割部材を上下に配置し、
前記上下の半割部材の内周面を固体潤滑剤でコーティングしたすべり軸受であって、
前記下側の半割部材の軸方向端部に回転方向下流側合わせ面から所定の軸受角度まで円周方向に設けた細長部を除いて、前記固体潤滑剤でコーティングすることにより、前記固体潤滑剤でコーティングされていない部分に溝を形成した、ことを特徴とするすべり軸受。 A half member that divides the cylinder into two parallel to the axial direction is placed up and down,
A slide bearing in which inner circumferential surfaces of the upper and lower halved members are coated with a solid lubricant,
The solid lubricant is coated with the solid lubricant except for the elongated portion provided in the circumferential direction from the mating surface on the downstream side in the rotation direction to the predetermined bearing angle at the axial end of the lower half member. A plain bearing characterized in that a groove is formed in a portion not coated with the agent. 前記上下の半割部材の内周面を固体潤滑剤でコーティングする前に、前記下側の半割部材の軸方向端部に、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細長形状のマスキング部材を配置し、
前記上下の半割部材の内周面を固体潤滑剤でコーティングした後に、前記マスキング部材を取除くことにより、前記固体潤滑剤でコーティングされていない部分に溝を形成した、ことを特徴とする請求項１に記載のすべり軸受。 Before coating the inner peripheral surfaces of the upper and lower halved members with a solid lubricant, on the axial end of the lower halved member, in the circumferential direction from the downstream facing surface in the rotational direction to a predetermined bearing angle. Place a long and narrow masking member,
The inner peripheral surfaces of the upper and lower halved members are coated with a solid lubricant, and then the masking member is removed to form a groove in a portion not coated with the solid lubricant. Item 6. The plain bearing according to item 1. 円筒を軸方向と平行に二分割した半割部材を上下に配置し、前記上下の半割部材の内周面を固体潤滑剤でコーティングしたすべり軸受の製造方法であって、
前記下側の半割部材の軸方向端部において、回転方向下流側合わせ面から所定の軸受角度まで円周方向に細長形状のマスキング部材を配置する、マスキング工程と、
前記上下の半割部材の内周面を固体潤滑剤でコーティングする、コーティング工程と、
前記マスキング部材を取除くことにより、前記固体潤滑剤でコーティングされていない部分に溝を形成する、溝製造工程と、を備えることを特徴とするすべり軸受の製造方法。 A method of manufacturing a sliding bearing in which a half member divided into two in parallel with an axial direction is arranged vertically, and the inner peripheral surface of the upper and lower half members is coated with a solid lubricant,
A masking step of disposing an elongated masking member in the circumferential direction from the rotation direction downstream mating surface to a predetermined bearing angle at the axial end of the lower half member;
Coating the inner peripheral surfaces of the upper and lower halved members with a solid lubricant; and a coating process;
And a groove manufacturing step of forming a groove in a portion that is not coated with the solid lubricant by removing the masking member.
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