JP2010096258A - Sliding bearing and bearing device - Google Patents

Sliding bearing and bearing device Download PDF

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JP2010096258A
JP2010096258A JP2008267197A JP2008267197A JP2010096258A JP 2010096258 A JP2010096258 A JP 2010096258A JP 2008267197 A JP2008267197 A JP 2008267197A JP 2008267197 A JP2008267197 A JP 2008267197A JP 2010096258 A JP2010096258 A JP 2010096258A
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bearing
circumferential
groove
crankshaft
bearings
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JP5043798B2 (en
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Seiji Hirako
昌治 平工
Yuichi Tomita
裕一 富田
Atsushi Okado
篤 岡戸
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Daido Metal Co Ltd
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Daido Metal Co Ltd
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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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/022—Sliding-contact bearings for exclusively rotary movement for radial load only with a pair of essentially semicircular bearing sleeves
    • 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
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/1045—Details of supply of the liquid to the bearing
    • F16C33/105—Conditioning, e.g. metering, cooling, filtering
    • 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
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding bearing and a bearing device capable of effectively discharging a foreign matter in order to prevent the foreign matter from entering a sliding surface of the sliding bearing. <P>SOLUTION: In the sliding bearing 1, an axial groove 6 is formed in a combining surface 5 of an upper half split bearing 2 and a lower half-split bearing 3, so that the foreign matter arriving at the circumferential end at the front side of a relatively rotational direction of a crankshaft 10, rolling on the groove bottom of a circumferential groove 4 in the upper half-split bearing 2 easily enters the axial groove 6 communicating with the groove bottom surface of the circumferential end, and the foreign matter having entered the axial groove 6 can be discharged to width-direction end faces 2c, 3c side of the half-split bearings 2, 3. Therefore, the foreign matter present inside the sliding bearing 1 is not caught in an inner peripheral surface 2a side of the lower half-split bearing 3, and the foreign matter can be prevented from entering the sliding surface of the sliding bearing 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受、及び、すべり軸受が一対の分割型軸受ハウジングに前記半割形状軸受の周方向両端部で当接する組合せ面と前記分割型軸受ハウジングの組合せ当接面とが一致するように組み込まれたすべり軸受装置に関するものである。   The present invention combines a pair of halved bearings so as to support a crankshaft of an internal combustion engine to form a cylindrical shape, and a circumferential oil groove along the circumferential direction is formed on the inner peripheral surface of one of the halved bearings Of the split type bearing housing, and a combination surface where the slide bearing abuts a pair of split type bearing housings at both ends in the circumferential direction of the half bearing and the split type bearing housing. The present invention relates to a plain bearing device incorporated so as to coincide with the combined contact surface.

従来、内燃機関のクランク軸用すべり軸受は、一対の半割形状軸受を組み合わせて円筒形にしたものを使用している。一対の半割形状軸受のうちの少なくとも一方の軸受の内周面中央には、円周方向油溝が形成されることにより、この円周方向油溝を経てすべり軸受の摺動面に対する給油が行なわれていた。また、一対の半割形状軸受の周方向両端部で当接する組合せ面は、分割型軸受ハウジングの組合せ当接面の位置と一致するように組み込まれている（例えば、特許文献１）。   2. Description of the Related Art Conventionally, a crankshaft plain bearing for an internal combustion engine uses a cylindrical bearing that is a combination of a pair of halved bearings. A circumferential oil groove is formed at the center of the inner peripheral surface of at least one of the pair of half bearings, so that oil is supplied to the sliding surface of the slide bearing through the circumferential oil groove. It was done. Moreover, the combination surface which contact | abuts in the circumferential direction both ends of a pair of half bearing is integrated so that it may correspond with the position of the combination contact surface of a split-type bearing housing (for example, patent document 1).

また、すべり軸受に供給される潤滑油中に混入する異物がすべり軸受の摺動面へ混入することを防止するため、軸受内周面の周方向油溝と連通するように軸受内周面の周方向端部にリリーフ部を形成し、そのリリーフ部とクランク軸との隙間を異物排出路とするすべり軸受が提案されている（例えば、特許文献２）。   In addition, in order to prevent foreign matter mixed in the lubricating oil supplied to the slide bearing from entering the sliding surface of the slide bearing, the bearing inner circumferential surface is communicated with the circumferential oil groove on the bearing inner circumferential surface. There has been proposed a plain bearing in which a relief portion is formed at a circumferential end, and a clearance between the relief portion and the crankshaft is a foreign matter discharge path (for example, Patent Document 2).

特許文献２に開示される技術においては、図４（Ａ），（Ｂ）に示すように、内燃機関のクランク軸用すべり軸受２１への潤滑油の供給が、まず、クランク軸用すべり軸受２１の外部から上半割形状軸受２２に形成される供給穴２２ａを介して内周面に形成された周方向油溝２４内に供給され、その潤滑油がクランク軸用すべり軸受２１の摺動面及びクランクピン用すべり軸受（図示しない）の摺動面に供給される。この場合、内燃機関の最初の運転時には、上半割形状軸受２２の周方向油溝２４に供給される潤滑油に対して潤滑油路内に残留した異物が混入する場合が多いことが知られている。この異物は、潤滑油路の切削加工時の金属加工屑や鋳造時の鋳砂などであり、クランク軸２０の回転による潤滑油の流れに付随し、周方向油溝２４内をクランク軸２０の相対回転方向の前方側へ流れるが、半割形状軸受２２，２３の組合せ面２５付近に到達すると、周方向油溝２４を形成しない下半割形状軸受２３の周方向端面が障壁となる影響により潤滑油とともに内周面側に浮上する（図５（Ａ）参照）。そこで、従来のクランク軸用すべり軸受２１では、半割形状軸受２２，２３の内周面の周方向端部にクラッシュリリーフや面取等の隙間２６を形成することにより、この隙間２６から半割形状軸受２２，２３の幅方向端部へ潤滑油と一緒に異物を排出させていた。
特開平８−２７７８３１号公報 特開２００５−６９２８３号公報 In the technique disclosed in Patent Document 2, as shown in FIGS. 4A and 4B, the supply of lubricating oil to the crankshaft slide bearing 21 of the internal combustion engine is performed first. Is supplied into a circumferential oil groove 24 formed on the inner peripheral surface through a supply hole 22 a formed in the upper half-shaped bearing 22, and the lubricating oil is slid on the sliding surface of the crankshaft slide bearing 21. And a sliding surface of a crankpin slide bearing (not shown). In this case, it is known that in the initial operation of the internal combustion engine, foreign matter remaining in the lubricating oil passage is often mixed with the lubricating oil supplied to the circumferential oil groove 24 of the upper half-shaped bearing 22. ing. This foreign matter is metal processing scraps during cutting of the lubricating oil passage, casting sand during casting, and the like, accompanying the flow of lubricating oil due to the rotation of the crankshaft 20, and the inside of the circumferential oil groove 24 in the crankshaft 20. Although it flows to the front side in the relative rotational direction, when it reaches the vicinity of the combined surface 25 of the half-shaped bearings 22, 23, the circumferential end surface of the lower half-shaped bearing 23 that does not form the circumferential oil groove 24 becomes a barrier. It floats to the inner peripheral surface side together with the lubricating oil (see FIG. 5A). Therefore, in the conventional crankshaft plain bearing 21, by forming a clearance 26 such as a crush relief or chamfering at the circumferential end of the inner peripheral surfaces of the half-shaped bearings 22 and 23, a half split from the clearance 26 is achieved. Foreign matter was discharged together with the lubricating oil to the end portions of the shape bearings 22 and 23 in the width direction.
JP-A-8-277831 JP 2005-69283 A

ところで、近年の内燃機関はクランク軸の高回転化により、潤滑油より比重の大きい異物の周方向へ直進しようとする慣性力が大きくなっている。図５（Ｂ）には、このような比重の大きい異物のすべり軸受２１における排出メカニズムを説明するための拡大図を示す。クランク軸２０を高回転化させた場合、図５（Ｂ）の矢印Ａに示すように、上半割形状軸受２２における周方向油溝２４の溝底面を転動してきた異物が周方向油溝２４の端部に到達しても、この周方向端部に形成された隙間２６から排出されず、周方向油溝２４を形成していない側の下半割形状軸受２３の摺動面に混入しやすくなっていた。また、図５（Ｂ）の矢印Ｂに示すように、クランク軸２０の回転による潤滑油の周方向への流れにより、周方向油溝２４の端部に到達した異物がクラッシュリリーフや面取等により形成される隙間２６に入ったとしても、再び隙間２６から押し出されて下半割形状軸受２３の摺動面に混入するものも多かった。すなわち、図５（Ｂ）の矢印Ｃに示すように、周方向油溝２４の溝底面を転動してきた異物が周方向油溝２４の端部に到達しても、その全ての異物が半割形状軸受２２，２３の幅方向端部に排出されることはなく、周方向油溝２４が形成されない下半割形状軸受２３の摺動面（内周面）に混入する場合も多かった。   By the way, in recent internal combustion engines, due to the higher rotation of the crankshaft, the inertial force that tries to go straight in the circumferential direction of foreign matters having a specific gravity greater than that of the lubricating oil is increasing. FIG. 5B shows an enlarged view for explaining the discharge mechanism of the foreign matter slide bearing 21 having such a large specific gravity. When the crankshaft 20 is rotated at a high speed, as shown by an arrow A in FIG. 5B, the foreign matter rolling on the bottom surface of the circumferential oil groove 24 in the upper half-shaped bearing 22 is caused by the circumferential oil groove. Even if it reaches the end of 24, it is not discharged from the gap 26 formed in the circumferential end, and is mixed into the sliding surface of the lower half bearing 23 on the side where the circumferential oil groove 24 is not formed. It was easy to do. Further, as shown by an arrow B in FIG. 5B, the foreign matter that has reached the end of the circumferential oil groove 24 due to the flow of the lubricating oil in the circumferential direction due to the rotation of the crankshaft 20 causes crush relief, chamfering, etc. Even if it entered the gap 26 formed by the above, many were pushed out of the gap 26 again and mixed into the sliding surface of the lower half bearing 23. That is, as shown by an arrow C in FIG. 5B, even if the foreign matter rolling on the groove bottom surface of the circumferential oil groove 24 reaches the end of the circumferential oil groove 24, all the foreign matter is half The split bearings 22 and 23 are not discharged at the end in the width direction, and are often mixed into the sliding surface (inner peripheral surface) of the lower half bearing 23 where the circumferential oil groove 24 is not formed.

本発明は、上記した事情に鑑みなされたものであり、その目的とするところは、すべり軸受の摺動面に異物が混入することを防止するため、この異物の排出を効果的に行うことができるすべり軸受または軸受装置を提供することにある。   The present invention has been made in view of the circumstances described above, and the object of the present invention is to effectively discharge the foreign matter in order to prevent the foreign matter from entering the sliding surface of the slide bearing. It is an object of the present invention to provide a plain bearing or bearing device that can be used.

上記した目的を達成するために、請求項１に係る発明においては、内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受において、一対の前記半割形状軸受の周方向両端部で当接する組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記円周方向に直交する軸線方向に沿った軸線方向溝が、前記半割形状軸受の内周面側に開口することなく、前記半割形状軸受の幅方向端面の少なくとも一方側に開口すると共に、前記周方向油溝の周方向端部の溝底面と連通するように形成されることを特徴とする。   In order to achieve the above object, in the invention according to claim 1, a pair of half bearings are combined so as to support a crankshaft of an internal combustion engine to form a cylindrical shape. In the sliding bearing formed so that circumferential oil grooves along the circumferential direction are opened at both circumferential end surfaces on the circumferential surface, out of the combination surfaces abutting at both circumferential ends of the pair of halved bearings The axial groove along the axial direction orthogonal to the circumferential direction is on the combination surface corresponding to the front side in the relative rotational direction of the crankshaft in the half bearing having at least the circumferential oil groove formed therein. Without opening to the inner peripheral surface side of the half-shaped bearing, it opens to at least one side of the end surface in the width direction of the half-shaped bearing and communicates with the groove bottom surface of the circumferential end of the circumferential oil groove. To be formed into And butterflies.

請求項２に係る発明においては、内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受において、一対の前記半割形状軸受の周方向両端部で当接する組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記半割形状軸受の半径方向に沿った半径方向溝が前記周方向油溝の周方向端部の溝底面と連通するように形成されると共に、前記円周方向に直交する軸線方向に沿った軸線方向溝が形成され、該軸線方向溝は、前記半割形状軸受の内周面側に開口することなく、前記半割形状軸受の幅方向端面の少なくとも一方側に開口すると共に、前記半径方向溝と連通するように形成されることを特徴とする。   In the invention according to claim 2, a pair of half bearings are combined to support the crankshaft of the internal combustion engine to form a cylindrical shape, and the inner circumferential surface of one of the half bearings is along the circumferential direction. In the slide bearing formed so that the circumferential oil groove is opened at both circumferential end faces, at least the circumferential oil groove is formed among the combined surfaces that contact at both circumferential ends of the pair of half bearings. A radial groove along a radial direction of the half-shaped bearing is a groove at a circumferential end of the circumferential oil groove on a combined surface corresponding to the front side in the relative rotational direction of the crankshaft in the half-shaped bearing formed. An axial groove is formed along the axial direction orthogonal to the circumferential direction, and the axial groove opens to the inner peripheral surface side of the half bearing. The width of the half bearing While open on at least one side of the end face, characterized in that it is formed so as to communicate with the radial grooves.

請求項３に係る発明においては、内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受が、一対の分割型軸受ハウジングに前記半割形状軸受の周方向両端部で当接する組合せ面と前記分割型軸受ハウジングの組合せ当接面とが一致するように組み込まれたすべり軸受装置において、一対の前記半割形状軸受の組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記半割形状軸受の半径方向に沿った半径方向溝が、前記半割形状軸受の外周面に開口すると共に、前記周方向油溝の周方向端部の溝底面と連通するように形成され、前記一対の分割型軸受ハウジングの組合せ当接面のうち、前記半径方向溝が形成された側にあたる組合せ当接面の内周面側には、円周方向に直交する軸線方向に沿った軸線方向溝が、前記分割型軸受ハウジングの幅方向端面の少なくとも一方側に開口すると共に、前記半径方向溝と連通するように形成されることを特徴とする。   In the invention according to claim 3, a pair of half bearings are combined so as to support the crankshaft of the internal combustion engine to form a cylindrical shape, and the inner circumferential surface of one of the half bearings is along the circumferential direction. A combined bearing in which a slide bearing formed so that a circumferential oil groove opens to both end faces in the circumferential direction is in contact with a pair of split bearing housings at both circumferential ends of the half bearing, and the split bearing housing In the sliding bearing device incorporated so that the combination contact surface of the pair of bearings coincides, the crankshaft in the half-shaped bearing in which at least the circumferential oil groove is formed among the combination surfaces of the pair of half-shaped bearings A radial groove along the radial direction of the half-shaped bearing opens on the outer circumferential surface of the half-shaped bearing and a circumferential direction of the circumferential oil groove on the combined surface corresponding to the front side in the relative rotational direction of edge Of the combined contact surfaces of the pair of split bearing housings, the inner surface of the combined contact surface corresponding to the side on which the radial groove is formed has a circumferential direction. An axial groove along an axial direction perpendicular to the opening is formed on at least one side of the end surface in the width direction of the split type bearing housing and communicated with the radial groove.

請求項１に係る発明においては、一対の半割形状軸受の周方向両端部で当接する組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面に、周方向油溝の周方向端部の溝底面と連通する軸線方向溝が形成されている。このため、周方向油溝の溝底面を転動しながらクランク軸の相対回転方向の前方側にあたる周方向端部に到達した異物は、その周方向端部の溝底面と連通する軸線方向溝に入りやすく、この軸線方向溝に入った異物をすべり軸受の幅方向端面側に排出することができる。また、軸線方向溝は、半割形状軸受の幅方向端面の少なくとも一方側に開口することにより、すべり軸受の内周面側に開口させないので、クランク軸の回転によるすべり軸受の摺動面とクランク軸の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝に入った全ての異物をすべり軸受の幅方向端面側までスムーズに排出することができる。   In the invention which concerns on Claim 1, the relative rotation direction of the said crankshaft in the half-shaped bearing in which the said circumferential direction oil groove was formed at least among the combined surfaces contacted in the circumferential direction both ends of a pair of half-shaped bearing An axial groove that communicates with the groove bottom surface of the circumferential end of the circumferential oil groove is formed on the combination surface corresponding to the front side of the groove. For this reason, the foreign matter that has reached the circumferential end corresponding to the front side in the relative rotational direction of the crankshaft while rolling on the groove bottom surface of the circumferential oil groove enters the axial groove communicating with the groove bottom surface of the circumferential end portion. It is easy to enter, and foreign matter that has entered the axial groove can be discharged to the end surface in the width direction of the slide bearing. In addition, the axial groove is opened on at least one side of the end surface in the width direction of the half bearing, so that it does not open on the inner peripheral surface side of the slide bearing. Without being affected at all by the circumferential flow of the lubricating oil between the surfaces of the shaft, all foreign matter entering the axial groove can be smoothly discharged to the end surface side in the width direction of the slide bearing.

また、請求項２に係る発明においては、一対の半割形状軸受の組合せ面のうち、少なくとも周方向油溝が形成された半割形状軸受におけるクランク軸の相対回転方向の前方側にあたる組合せ面に、周方向油溝の周方向端部の溝底面と連通する半径方向溝が形成されている。このため、周方向油溝の溝底面を転動しながらクランク軸の相対回転方向の前方側にあたる周方向端部に到達した異物は、クランク軸の回転による遠心力の作用方向にあたる半径方向溝に入りやすく、この半径方向溝に入った異物を、半径方向溝と連通する軸線方向溝を介してすべり軸受の幅方向端面側に排出することができる。また、軸線方向溝は、半割形状軸受の幅方向端面の少なくとも一方側に開口することにより、すべり軸受の内周面側には開口させないので、クランク軸の回転によるすべり軸受の摺動面とクランク軸の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝に入った全ての異物をすべり軸受の幅方向端面側までスムーズに排出することができる。   Moreover, in the invention which concerns on Claim 2, it is the combination surface which hits the front side of the relative rotation direction of a crankshaft in the half-shaped bearing in which the circumferential direction oil groove was formed among the combination surfaces of a pair of half-shaped bearing. A radial groove communicating with the groove bottom surface at the circumferential end of the circumferential oil groove is formed. For this reason, the foreign matter that has reached the circumferential end corresponding to the front side in the relative rotation direction of the crankshaft while rolling on the groove bottom surface of the circumferential oil groove becomes a radial groove that corresponds to the centrifugal force acting direction due to the rotation of the crankshaft. It is easy to enter, and foreign matter that has entered the radial groove can be discharged to the end surface in the width direction of the slide bearing through the axial groove communicating with the radial groove. In addition, the axial groove is opened on at least one side of the end surface in the width direction of the half-shaped bearing and is not opened on the inner peripheral surface side of the slide bearing. Without being affected at all by the circumferential flow of the lubricating oil between the surfaces of the crankshaft, all foreign matter entering the axial groove can be smoothly discharged to the end surface in the width direction of the slide bearing.

また、請求項３に係る発明においては、一対の半割形状軸受の組合せ面のうち、少なくとも周方向油溝が形成された半割形状軸受におけるクランク軸の相対回転方向の前方側にあたる組合せ面に、周方向油溝の周方向端部の溝底面と連通する半径方向溝が形成されている。このため、周方向油溝の溝底面を転動しながらクランク軸の相対回転方向の前方側にあたる周方向端部に到達した異物は、クランク軸の回転による遠心力の作用方向にあたる半径方向溝に入りやすく、この半径方向溝に入った異物を、半径方向溝と連通する分割型軸受ハウジングの軸線方向溝を介して分割型軸受ハウジングの幅方向端面側に排出することができる。また、軸線方向溝は、一対の分割型軸受ハウジングの組合せ当接面の内周面側に形成することにより、すべり軸受の内周面側には開口させないので、クランク軸の回転によるすべり軸受の摺動面とクランク軸の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝に入った全ての異物を分割型軸受ハウジングの幅方向端面側までスムーズに排出することができる。   Moreover, in the invention which concerns on Claim 3, it is the combination surface which hits the front side of the relative rotation direction of a crankshaft in the half-shaped bearing in which the circumferential direction oil groove was formed among the combination surfaces of a pair of half-shaped bearing. A radial groove communicating with the groove bottom surface at the circumferential end of the circumferential oil groove is formed. For this reason, the foreign matter that has reached the circumferential end corresponding to the front side in the relative rotation direction of the crankshaft while rolling on the groove bottom surface of the circumferential oil groove becomes a radial groove that corresponds to the centrifugal force acting direction due to the rotation of the crankshaft. It is easy to enter, and foreign matter that has entered the radial groove can be discharged to the end surface in the width direction of the split bearing housing through the axial groove of the split bearing housing that communicates with the radial groove. In addition, the axial groove is formed on the inner peripheral surface side of the combination contact surface of the pair of split bearing housings, so that it does not open on the inner peripheral surface side of the slide bearing. Smoothly remove all foreign matter in the axial groove to the end face in the width direction of the split bearing housing without being affected by the circumferential flow of lubricant between the sliding surface and the surface of the crankshaft. Can be discharged.

以下、本発明の実施形態について図１乃至図３を参照して説明する。図１及び図２は、クランク軸１０を支持する２つの上半割形状軸受２と下半割形状軸受３からなるすべり軸受１の側面図（Ａ）と、上半割形状軸受２と下半割形状軸受３の平面図（Ｂ）であり、図３は、クランク軸１０を支持する２つの上半割形状軸受２と下半割形状軸受３からなるすべり軸受１が分割型軸受ハウジング８に組み込まれたすべり軸受装置の側面図（Ａ）と、上下の半割形状軸受３，４が組み込まれた分割型軸受ハウジング１１の上軸受ハウジング１２と下軸受ハウジング１３の平面図（Ｂ）である。なお、上記した図は、実施形態に係るすべり軸受１及び分割型軸受ハウジング８の概略図であり、構成，構造等を理解し易くするために各箇所が誇張あるいは省略して描かれている。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 and FIG. 2 are a side view (A) of a plain bearing 1 comprising two upper half bearings 2 and a lower half bearing 3 that support the crankshaft 10, and the upper half bearing 2 and the lower half. FIG. 3B is a plan view (B) of the split bearing 3, and FIG. 3 shows that the slide bearing 1 including the two upper half bearings 2 and the lower half bearing 3 supporting the crankshaft 10 is formed in the split bearing housing 8. FIG. 4 is a side view (A) of the incorporated plain bearing device, and a plan view (B) of the upper bearing housing 12 and the lower bearing housing 13 of the split bearing housing 11 in which the upper and lower half bearings 3 and 4 are incorporated. . The above-described drawings are schematic views of the sliding bearing 1 and the split bearing housing 8 according to the embodiment, and each part is exaggerated or omitted for easy understanding of the configuration, structure, and the like.

まず、請求項１に係る発明に対応する第１実施形態について、図１を参照して説明する。図１（Ａ）に示すように、内燃機関のクランク軸１０を回転可能に支持するすべり軸受１は、半割形状に形成された一対の半割形状軸受２，３が周方向両端部で当接する組合せ面５で上下２個組み合わせて円筒状となるように形成されている。この半割形状軸受２，３の内周面２ａ，３ａは、非焼付性など半割形状軸受２，３の軸受特性を満足するために、例えば、鋼裏金に銅系合金、アルミニウム合金、纏系合金等の摺動材がライニングされており、必要に応じて纏系合金や合成樹脂系等のオーバーレイが施されている。   First, a first embodiment corresponding to the invention according to claim 1 will be described with reference to FIG. As shown in FIG. 1 (A), a plain bearing 1 that rotatably supports a crankshaft 10 of an internal combustion engine has a pair of half-shaped bearings 2 and 3 formed in a half-shape at both ends in the circumferential direction. A combination surface 5 in contact with each other is formed so as to form a cylindrical shape by combining two upper and lower surfaces. In order to satisfy the bearing characteristics of the half-shaped bearings 2 and 3 such as non-seizure, the inner peripheral surfaces 2a and 3a of the half-shaped bearings 2 and 3 are made of, for example, a copper alloy, an aluminum alloy, A sliding material such as a system alloy is lined, and an overlay such as a summary system alloy or a synthetic resin system is applied as necessary.

また、図１（Ｂ）に示すように、半割形状軸受２，３のうち上半割形状軸受２の内周面２ａの幅方向ほぼ中央には、半割形状軸受２，３と該半割形状軸受２，３に支持されるクランク軸１０との間に潤滑油を供給するための周方向油溝４が、円周方向の全体に沿って形成されている。この周方向油溝４は、半割形状軸受２，３の厚さが１．５〜１．８ｍｍの範囲の仕様のものでは０．８ｍｍ程度の深さで形成されると共に、その両端部が上半割形状軸受２の周方向端面２ｂで開口するように形成されている。また、周方向油溝４には、外部から油の供給を受けるための供給穴４ａが、上半割形状軸受２の半径方向に貫通して形成されている。   Further, as shown in FIG. 1 (B), the half-shaped bearings 2 and 3 and the half-shaped bearings 2 and 3 are arranged at the center in the width direction of the inner peripheral surface 2a of the upper half-shaped bearing 2 among the half-shaped bearings 2 and 3. A circumferential oil groove 4 for supplying lubricating oil to the crankshaft 10 supported by the split bearings 2 and 3 is formed along the entire circumferential direction. The circumferential oil groove 4 is formed with a depth of about 0.8 mm when the half bearings 2 and 3 have a thickness in the range of 1.5 to 1.8 mm, and both end portions thereof are The upper half bearing 2 is formed so as to open at the circumferential end surface 2b. The circumferential oil groove 4 is formed with a supply hole 4 a for receiving oil supply from the outside so as to penetrate in the radial direction of the upper half-shaped bearing 2.

ところで、本実施形態におけるすべり軸受１を構成する上半割形状軸受２の周方向端面２ｂと下半割形状軸受３の周方向端面３ｂの当接面である組合せ面５内には、図１（Ａ），（Ｂ）に示すように、潤滑油と一緒に異物を外部に排出するための軸線方向溝６が、すべり軸受１の円周方向や半径方向に直交する軸線方向に沿って形成されている。この軸線方向溝６は、上半割形状軸受２の周方向端面２ｂに形成された上軸線方向溝６ａと下半割形状軸受３の周方向端面３ｂに形成された下軸線方向溝６ｂを上下２個組み合わせて一つの軸線方向溝６となるように一定の深さで切欠形成されると共に、その両端部が半割形状軸受２，３の幅方向端面２ｃ，３ｃで開口するように形成されている。また、軸線方向溝６は、周方向油溝４の溝底面の端部４ｂと連通するように形成されている。   By the way, in the combination surface 5 which is a contact surface of the circumferential end surface 2b of the upper half-shaped bearing 2 and the circumferential end surface 3b of the lower half-shaped bearing 3 constituting the slide bearing 1 in this embodiment, FIG. As shown in (A) and (B), an axial groove 6 for discharging foreign matter together with the lubricating oil is formed along the axial direction perpendicular to the circumferential direction and the radial direction of the slide bearing 1. Has been. The axial groove 6 is formed by moving the upper axial groove 6a formed on the circumferential end surface 2b of the upper half bearing 2 and the lower axial groove 6b formed on the circumferential end surface 3b of the lower half bearing 3 up and down. The two are combined to form one axial groove 6 with a certain depth, and both ends thereof are formed to open at the width direction end faces 2c and 3c of the half-shaped bearings 2 and 3. ing. The axial groove 6 is formed so as to communicate with the end 4 b of the groove bottom surface of the circumferential oil groove 4.

上記のように構成されるすべり軸受１は、上半割形状軸受２及び下半割形状軸受３の組合せ面５内に軸線方向溝６が形成されているため、上半割形状軸受２における周方向油溝４の溝底面を転動しながらクランク軸１０の相対回転方向の前方側にあたる周方向端部に到達した異物が、その周方向端部の溝底面と連通する軸線方向溝６に入りやすく、この軸線方向溝６に入った異物を半割形状軸受２，３の幅方向端面２ｃ，３ｃ側にスムーズに排出することができる。   The sliding bearing 1 configured as described above has an axial groove 6 formed in the combined surface 5 of the upper half-shaped bearing 2 and the lower half-shaped bearing 3, so The foreign matter that reaches the circumferential end corresponding to the front side in the relative rotation direction of the crankshaft 10 while rolling on the groove bottom surface of the directional oil groove 4 enters the axial groove 6 that communicates with the groove bottom surface of the circumferential end portion. It is easy to smoothly discharge the foreign matter that has entered the axial groove 6 to the side faces 2c and 3c in the width direction of the half bearings 2 and 3.

また、軸線方向溝６は、半割形状軸受２，３の幅方向端面２ｃ，３ｃに開口することにより、半割形状軸受２，３の内周面２ａ，３ａ側には開口させないので、クランク軸１０の回転によるすべり軸受１の摺動面とクランク軸１０の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝６に入った全ての異物を半割形状軸受２，３の幅方向端面２ｃ，３ｃ側までスムーズに排出することができる。このように、本実施形態に係るすべり軸受１においては、すべり軸受１の内部に存在する異物を下半割形状軸受３の内周面２ａ側に巻き込むことがなく、すべり軸受１の摺動面に異物が混入することを防止することができる。   Further, the axial groove 6 is not opened on the inner peripheral surfaces 2a and 3a side of the half-shaped bearings 2 and 3 by opening in the width direction end faces 2c and 3c of the half-shaped bearings 2 and 3, Without being affected at all by the circumferential flow of the lubricating oil between the sliding surface of the sliding bearing 1 and the surface of the crankshaft 10 due to the rotation of the shaft 10, all the foreign matter that has entered the axial groove 6 is removed by half. The split-shaped bearings 2 and 3 can be smoothly discharged to the width direction end faces 2c and 3c side. Thus, in the sliding bearing 1 according to the present embodiment, the foreign matter existing inside the sliding bearing 1 is not caught on the inner peripheral surface 2a side of the lower half-shaped bearing 3, and the sliding surface of the sliding bearing 1 is obtained. It is possible to prevent foreign matters from being mixed into the glass.

以上、第１実施形態に係るすべり軸受１に形成される軸線方向溝６等について説明したが、次に、請求項２に係る発明に対応する実施形態であって、すべり軸受１に軸線方向溝６とともに半径方向溝７が形成されている第２実施形態について図２を参照して説明する。なお、第１実施形態と同じ機能を奏する部材については、第１実施形態と同じ符号が付してある。   The axial groove 6 and the like formed in the slide bearing 1 according to the first embodiment have been described above. Next, in the embodiment corresponding to the invention according to claim 2, the axial groove is provided in the slide bearing 1. A second embodiment in which a radial groove 7 is formed together with 6 will be described with reference to FIG. In addition, about the member which show | plays the same function as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected.

まず、第２実施形態に係るすべり軸受１を構成する上半割形状軸受２の周方向端面２ｂ内には、図２（Ａ）に示すように、潤滑油と一緒に異物を軸線方向溝６に誘導するための半径方向溝７が、すべり軸受１の半径方向に沿って形成されている。この半径方向溝７は、一定の深さで切欠形成されると共に、その一方側端部が周方向油溝４の溝底面の端部４ｂと連通し、他方側端部が後述する軸線方向溝６と連通するように形成されている。   First, in the circumferential end surface 2b of the upper half-shaped bearing 2 constituting the sliding bearing 1 according to the second embodiment, as shown in FIG. Are formed along the radial direction of the slide bearing 1. The radial groove 7 is notched at a certain depth, and one end thereof communicates with the end 4b of the groove bottom surface of the circumferential oil groove 4, and the other end thereof is an axial groove described later. 6 is formed so as to communicate with 6.

また、第２実施形態に係るすべり軸受１を構成する上半割形状軸受２の周方向端面２ｂと下半割形状軸受３の周方向端面３ｂの当接面である組合せ面５の外周面２ｄ，３ｄ側には、図２（Ａ），（Ｂ）に示すように、上半割形状軸受２の周方向端面２ｂに形成された半径方向溝７を介して潤滑油と一緒に異物を外部に排出するための軸線方向溝６が、すべり軸受１の円周方向や半径方向に直交する軸線方向に沿って形成されている。この軸線方向溝６は、上半割形状軸受２の周方向端面２ｂにおける外周面２ｄ側に形成された上軸線方向溝６ａと下半割形状軸受３の周方向端面３ｂにおける外周面３ｄ側に形成された下軸線方向溝６ｂを上下２個組み合わせて一つの軸線方向溝６となるように一定の深さで切欠形成されると共に、その両端部が半割形状軸受２，３の幅方向端面２ｃ，３ｃで開口するように形成されている。また、軸線方向溝６は、上半割形状軸受２の周方向端面２ｂに形成された半径方向溝７と連通するように形成されている。   Further, the outer peripheral surface 2d of the combination surface 5 which is a contact surface between the circumferential end surface 2b of the upper half-shaped bearing 2 and the circumferential end surface 3b of the lower half-shaped bearing 3 constituting the plain bearing 1 according to the second embodiment. , 3d side, as shown in FIGS. 2 (A) and 2 (B), foreign matter is externally introduced together with the lubricating oil via the radial groove 7 formed in the circumferential end surface 2b of the upper half bearing 2. An axial groove 6 is formed along the axial direction perpendicular to the circumferential direction and the radial direction of the slide bearing 1. The axial groove 6 is formed on the outer circumferential surface 2d side of the circumferential end surface 2b of the upper half bearing 2 and on the outer circumferential surface 3d side of the circumferential end surface 3b of the lower half bearing 3. The formed lower axial grooves 6b are combined with two upper and lower parts to be cut out at a fixed depth so as to form one axial groove 6, and both end portions thereof are end faces in the width direction of the half-shaped bearings 2 and 3. It is formed so as to open at 2c and 3c. The axial groove 6 is formed so as to communicate with the radial groove 7 formed on the circumferential end surface 2 b of the upper half bearing 2.

上記のように構成される第２実施形態に係るすべり軸受１は、上半割形状軸受２の周方向端面２ｂに半径方向溝７が形成されているため、上半割形状軸受２における周方向油溝４の溝底面を転動しながらクランク軸１０の相対回転方向の前方側にあたる周方向端部に到達した異物が、クランク軸１０の回転による遠心力の作用方向にあたる半径方向溝７に入りやすく、この半径方向溝７に入った異物を、半径方向溝７と連通する軸線方向溝６を介して半割形状軸受２，３の幅方向端面２ｃ，３ｃ側にスムーズに排出することができる。   In the slide bearing 1 according to the second embodiment configured as described above, since the radial groove 7 is formed in the circumferential end surface 2b of the upper half-shaped bearing 2, the circumferential direction in the upper half-shaped bearing 2 is the same. The foreign matter that has reached the circumferential end corresponding to the front side in the relative rotational direction of the crankshaft 10 while rolling on the bottom surface of the oil groove 4 enters the radial groove 7 that corresponds to the direction of the centrifugal force due to the rotation of the crankshaft 10. It is easy and the foreign matter that has entered the radial groove 7 can be smoothly discharged to the side faces 2c and 3c in the width direction of the half bearings 2 and 3 through the axial groove 6 communicating with the radial groove 7. .

また、軸線方向溝６は、半割形状軸受２，３の幅方向端面２ｃ，３ｃに開口することにより、半割形状軸受２，３の内周面２ａ，３ａ側には開口させないので、クランク軸１０の回転によるすべり軸受１の摺動面とクランク軸１０の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝６に入った全ての異物を半割形状軸受２，３の幅方向端面２ｃ，３ｃ側までスムーズに排出することができる。このように、第２本実施形態に係るすべり軸受１においては、すべり軸受１の内部に存在する異物を下半割形状軸受３の内周面２ａ側に巻き込むことがなく、すべり軸受１の摺動面に異物が混入することを防止することができる。   Further, the axial groove 6 is not opened on the inner peripheral surfaces 2a and 3a side of the half-shaped bearings 2 and 3 by opening in the width direction end faces 2c and 3c of the half-shaped bearings 2 and 3, Without being affected at all by the circumferential flow of the lubricating oil between the sliding surface of the sliding bearing 1 and the surface of the crankshaft 10 due to the rotation of the shaft 10, all the foreign matter that has entered the axial groove 6 is removed by half. The split-shaped bearings 2 and 3 can be smoothly discharged to the width direction end faces 2c and 3c side. As described above, in the sliding bearing 1 according to the second embodiment, the foreign matter existing inside the sliding bearing 1 is not caught on the inner peripheral surface 2a side of the lower half-shaped bearing 3, and the sliding of the sliding bearing 1 is prevented. It is possible to prevent foreign matters from entering the moving surface.

上記した第１実施形態及び第２実施形態においては、すべり軸受１側に軸線方向溝６が形成されているものについて説明したが、次に、請求項３に係る発明に対応する実施形態であって、分割型軸受ハウジング１１側に軸線方向溝６が形成されている第３実施形態について図３を参照して説明する。なお、第１実施形態及び第２実施形態と同じ機能を奏する部材については、これらの実施形態と同じ符号が付してある。   In the first embodiment and the second embodiment described above, the case where the axial groove 6 is formed on the slide bearing 1 side has been described. Next, an embodiment corresponding to the invention according to claim 3 is described. A third embodiment in which the axial groove 6 is formed on the split bearing housing 11 side will be described with reference to FIG. In addition, about the member which show | plays the same function as 1st Embodiment and 2nd Embodiment, the same code | symbol as these embodiments is attached | subjected.

まず、第３実施形態に係るすべり軸受１を構成する上半割形状軸受２の周方向端面２ｂ内には、図３（Ａ）に示すように、潤滑油と一緒に異物を軸線方向溝６に誘導するための半径方向溝７が、すべり軸受１の半径方向に沿って形成されている。この半径方向溝７は、一定の深さで切欠形成されると共に、その一方側端部が周方向油溝４の溝底面の端部４ｂと連通し、他方側端部が半割形状軸受２の外周面２ｄで開口するように形成されている。   First, in the circumferential end surface 2b of the upper half-shaped bearing 2 constituting the plain bearing 1 according to the third embodiment, as shown in FIG. Are formed along the radial direction of the slide bearing 1. The radial groove 7 is notched at a certain depth, and one end portion thereof communicates with the end portion 4 b of the groove bottom surface of the circumferential oil groove 4, and the other end portion thereof halves the bearing 2. The outer peripheral surface 2d is formed so as to open.

また、図３（Ａ）に示すように、すべり軸受１が組み込まれる分割型軸受ハウジング１１は、軸受ハウジング１２，１３を上下２個組み合わせて半割形状軸受２，３の組合せ面５と軸受ハウジング１２，１３の組合せ当接面１４が一致するように形成されている。また、上軸受ハウジング１２及び下軸受ハウジング１３の組合せ当接面１４の内周面１２ａ，１３ａ側には、図３（Ａ），（Ｂ）に示すように、上半割形状軸受２の周方向端面２ｂに形成された半径方向溝７を介して潤滑油と一緒に異物を外部に排出するための軸線方向溝６が、分割型軸受ハウジング１１の幅方向に沿って形成されている。この軸線方向溝６は、上軸受ハウジング１２ａの周方向端面１２ｂにおける内周面１２ａ側に形成された上軸線方向溝６ａと下軸受ハウジング１３の周方向端面１３ｂにおける内周面１３ａ側に形成された下軸線方向溝６ｂを上下２個組み合わせて一つの軸線方向溝６となるように一定の深さで切欠形成されると共に、その両端部が軸受ハウジング１２，１３の幅方向端面１２ｃ，１３ｃで開口するように形成されている。また、軸線方向溝６は、すべり軸受１が装着された際に、上半割形状軸受２の周方向端面２ｂに形成された半径方向溝７と連通するように形成されている。   As shown in FIG. 3 (A), the split bearing housing 11 into which the slide bearing 1 is incorporated is a combination of the two upper and lower bearing housings 12 and 13 and the combined surface 5 of the half bearings 2 and 3 and the bearing housing. The combination contact surfaces 14 and 13 are formed so as to coincide with each other. Further, on the inner peripheral surfaces 12 a and 13 a side of the combined contact surface 14 of the upper bearing housing 12 and the lower bearing housing 13, as shown in FIGS. An axial groove 6 is formed along the width direction of the split bearing housing 11 for discharging foreign matter together with the lubricating oil through a radial groove 7 formed in the direction end face 2b. The axial groove 6 is formed on the inner circumferential surface 13 a side of the upper axial groove 6 a formed on the inner circumferential surface 12 a side of the circumferential end surface 12 b of the upper bearing housing 12 a and the circumferential end surface 13 b of the lower bearing housing 13. In addition, the lower axial groove 6b is combined with two upper and lower parts to be cut out at a fixed depth so as to form one axial groove 6, and both end portions thereof are width direction end faces 12c and 13c of the bearing housings 12 and 13, respectively. It is formed to open. The axial groove 6 is formed so as to communicate with the radial groove 7 formed on the circumferential end surface 2b of the upper half-shaped bearing 2 when the slide bearing 1 is mounted.

上記のように構成される第３実施形態に係るすべり軸受１及び分割型軸受ハウジング１１は、上半割形状軸受２の周方向端面２ｂに半径方向溝７が形成されているため、上半割形状軸受２における周方向油溝４の溝底面を転動しながらクランク軸１０の相対回転方向の前方側にあたる周方向端部に到達した異物が、クランク軸１０の回転による遠心力の作用方向にあたる半径方向溝７に入りやすく、この半径方向溝７に入った異物を、半径方向溝７と連通する軸受ハウジング１２，１３の軸線方向溝６を介して幅方向端面１２ｃ，１３ｃ側にスムーズに排出することができる。   Since the slide bearing 1 and the split bearing housing 11 according to the third embodiment configured as described above are formed with the radial grooves 7 on the circumferential end surface 2b of the upper half-shaped bearing 2, the upper half The foreign matter that has reached the circumferential end corresponding to the front side in the relative rotational direction of the crankshaft 10 while rolling on the bottom surface of the circumferential oil groove 4 in the shape bearing 2 corresponds to the acting direction of the centrifugal force due to the rotation of the crankshaft 10. It is easy to enter the radial groove 7, and foreign matter that has entered the radial groove 7 is smoothly discharged to the width direction end faces 12 c and 13 c side through the axial grooves 6 of the bearing housings 12 and 13 communicating with the radial groove 7. can do.

また、軸線方向溝６は、軸受ハウジング１２，１３の組合せ当接面１４の内周面１２ａ，１３ａ側に形成することにより、半割形状軸受２，３の内周面２ａ，３ａ側には開口させないので、クランク軸１０の回転によるすべり軸受１の摺動面とクランク軸１０の表面間での潤滑油の周方向への流れの影響を全く受けることがなく、軸線方向溝６に入った全ての異物を軸受ハウジング１２，１３の幅方向端面１２ｃ，１３ｃ側までスムーズに排出することができる。このように、第３本実施形態に係るすべり軸受１及び分割型軸受ハウジング１１においては、すべり軸受１の内部に存在する異物を下半割形状軸受３の内周面２ａ側に巻き込むことがなく、すべり軸受１の摺動面に異物が混入することを防止することができる。   Further, the axial groove 6 is formed on the inner peripheral surfaces 12a and 13a side of the combined contact surface 14 of the bearing housings 12 and 13 so that it is formed on the inner peripheral surfaces 2a and 3a side of the half-shaped bearings 2 and 3. Since it is not opened, it is not affected by the flow of the lubricating oil in the circumferential direction between the sliding surface of the slide bearing 1 and the surface of the crankshaft 10 due to the rotation of the crankshaft 10 and enters the axial groove 6. All the foreign matters can be smoothly discharged to the width direction end faces 12c, 13c side of the bearing housings 12, 13. Thus, in the slide bearing 1 and the split bearing housing 11 according to the third embodiment, the foreign matter existing inside the slide bearing 1 is not caught on the inner peripheral surface 2 a side of the lower half-shaped bearing 3. It is possible to prevent foreign matters from entering the sliding surface of the slide bearing 1.

なお、以上説明した全ての実施形態においては、軸線方向溝６や半径方向溝７が、すべり軸受１を構成する上半割形状軸受２及び下半割形状軸受３の周方向両側の組合せ面５に形成されているが、周方向油溝２４内を転動する異物がクランク軸２０の相対回転方向の前方側へ流れるため、周方向油溝４を形成する上半割形状軸受２に対してクランク軸１０の相対回転方向の前方側となる組合せ面５のみに形成されてもよい。また、第３実施形態においては、軸線方向溝６が、分割型軸受ハウジング１１を構成する上軸受ハウジング１２及び下軸受ハウジング１３の両側の組合せ面１４に形成されているが、周方向油溝４を形成する上半割形状軸受２に対してクランク軸１０の相対回転方向の前方側となる分割型軸受ハウジング１１の組合せ面１４のみに形成されてもよい。   In all the embodiments described above, the axial grooves 6 and the radial grooves 7 are combined surfaces 5 on both sides in the circumferential direction of the upper half-shaped bearing 2 and the lower half-shaped bearing 3 constituting the slide bearing 1. However, since the foreign matter rolling in the circumferential oil groove 24 flows to the front side in the relative rotation direction of the crankshaft 20, the upper half-shaped bearing 2 that forms the circumferential oil groove 4 is used. You may form only in the combination surface 5 used as the front side of the relative rotation direction of the crankshaft 10. FIG. In the third embodiment, the axial grooves 6 are formed on the combined surfaces 14 on both sides of the upper bearing housing 12 and the lower bearing housing 13 constituting the split bearing housing 11. May be formed only on the combination surface 14 of the split bearing housing 11 which is the front side in the relative rotational direction of the crankshaft 10 with respect to the upper half-shaped bearing 2 that forms the same.

また、全ての実施形態においては、軸線方向溝６が、半割形状軸受２，３の幅方向端面２ｃ，３ｃや軸受ハウジング１２，１３の幅方向端面１２ｃ，１３ｃの両端面で開口するように形成されているが、片側の端面のみで開口するように形成されてもよい。また、軸線方向溝６や半径方向溝７は、組合せ面５を形成する一対の半割形状軸受２，３の両方の周方向端面２ｃ，３ｃに形成されてもよく、いずれか一方の半割形状軸受の周方向端面（例えば、上半割形状軸受２の周方向端面２ｃ）のみに形成されてもよい。また、第３実施形態においては、軸線方向溝６が、分割型軸受ハウジング１１を構成する上軸受ハウジング１２及び下軸受ハウジング１３の両側の周方向端面１２ｃ，１３ｃに形成されているが、いずれか一方の軸受ハウジングの周方向端面（例えば、上軸受ハウジング１２の周方向端面１２ｃ）のみに形成されてもよい。また、軸線方向溝６及び半径方向溝７の断面形状は、潤滑油中の異物が排出可能な限りにおいて制約はない。   Further, in all the embodiments, the axial groove 6 is opened at both end surfaces of the width direction end surfaces 2c, 3c of the half-shaped bearings 2, 3 and the width direction end surfaces 12c, 13c of the bearing housings 12, 13. Although formed, it may be formed so as to open only at one end face. The axial groove 6 and the radial groove 7 may be formed on both circumferential end faces 2c and 3c of the pair of half bearings 2 and 3 that form the combination surface 5, and either one of the half grooves You may form only in the circumferential direction end surface (For example, the circumferential direction end surface 2c of the upper half-shaped bearing 2) of a shape bearing. In the third embodiment, the axial grooves 6 are formed on the circumferential end faces 12c and 13c on both sides of the upper bearing housing 12 and the lower bearing housing 13 constituting the split bearing housing 11, but either You may form only in the circumferential direction end surface (For example, circumferential direction end surface 12c of the upper bearing housing 12) of one bearing housing. Moreover, the cross-sectional shape of the axial direction groove | channel 6 and the radial direction groove | channel 7 is not restrict | limited as long as the foreign material in lubricating oil can be discharged | emitted.

また、軸線方向溝６及び半径方向溝７は、その断面積が大きいほど潤滑油中の異物の排出効果が高まるが、断面積を過度に大きくすると潤滑油の漏れ量が多くなり過ぎる。実施例に示した断面Ｖ形状の溝を例とすると、深さが０．２〜１ｍｍ、幅が０．４〜２ｍｍの寸法とし、０．０４〜１ｍｍ2の断面積とすることが好ましい。また、他の断面形状で溝を形成した場合も、この範囲内の断面積とすることが好ましい。 Further, the larger the cross-sectional area of the axial groove 6 and the radial groove 7, the higher the effect of discharging foreign matters in the lubricating oil. However, if the cross-sectional area is excessively increased, the amount of leakage of the lubricating oil becomes excessive. Taking a groove with a V-shaped cross section as an example, the depth is 0.2 to 1 mm, the width is 0.4 to 2 mm, and the cross-sectional area is preferably 0.04 to 1 mm 2 . In addition, when the groove is formed in another cross-sectional shape, the cross-sectional area within this range is preferable.

また、周方向油溝４の深さや幅寸法や断面形状は、内燃機関の仕様により決まるものであり、本願では特に限定されない。また、周方向油溝４の周方向断面形状は、実施例に示す一円弧形状に限定されず、多円弧により形成される形状でもよい。また、周方向油溝４の深さや幅寸法を周方向で変化するように形成すること等も可能である。   Further, the depth, width dimension and cross-sectional shape of the circumferential oil groove 4 are determined by the specifications of the internal combustion engine and are not particularly limited in the present application. Moreover, the circumferential cross-sectional shape of the circumferential oil groove 4 is not limited to the single arc shape shown in the embodiment, and may be a shape formed by multiple arcs. Further, the depth and width of the circumferential oil groove 4 can be formed so as to change in the circumferential direction.

さらに、本願のすべり軸受１においては、従来のすべり軸受と同じく、半割形状軸受２，３の厚さを軸受周方向の中央部から端部に向かって変化させてもよい。また、半割形状軸受２，３の内周面２ａ．３ａ側の周方向端部にクラッシュリリーフや面取り等を形成してもよい。   Furthermore, in the sliding bearing 1 of the present application, the thickness of the half-shaped bearings 2 and 3 may be changed from the center portion to the end portion in the bearing circumferential direction, as in the conventional sliding bearing. Further, the inner peripheral surfaces 2a. A crush relief, chamfering, or the like may be formed at the circumferential end on the 3a side.

第１実施形態に係るクランク軸を支持する２つの上半割形状軸受と下半割形状軸受からなるすべり軸受の側面図（Ａ）と、上半割形状軸受と下半割形状軸受の平面図（Ｂ）である。The side view (A) of the slide bearing which consists of two upper half bearings and a lower half bearing which support the crankshaft which concerns on 1st Embodiment, and the top view of an upper half bearing and a lower half bearing (B). 第２実施形態に係る図１相当図である。FIG. 3 is a view corresponding to FIG. 1 according to a second embodiment. 第３実施形態に係るクランク軸を支持する２つの上半割形状軸受と下半割形状軸受からなるすべり軸受が分割型軸受ハウジングに組み込まれたすべり軸受装置の側面図（Ａ）と、上下の半割形状軸受が組み込まれた分割型軸受ハウジングの上軸受ハウジングと下軸受ハウジングの平面図（Ｂ）である。A side view (A) of a plain bearing device in which a plain bearing comprising two upper half bearings and a lower half bearing for supporting a crankshaft according to a third embodiment is incorporated in a split type bearing housing; It is a top view (B) of an upper bearing housing and a lower bearing housing in which a split bearing is incorporated. 従来例を示す図１相当図である。It is a figure equivalent to FIG. 1 which shows a prior art example. 従来のすべり軸受における異物の排出メカニズムを説明するための拡大図である。It is an enlarged view for demonstrating the discharge mechanism of the foreign material in the conventional slide bearing.

符号の説明Explanation of symbols

１ すべり軸受
２ 上半割形状軸受
３ 下半割形状軸受
４ 周方向油溝
４ａ 供給穴
５ 組合せ面
６ 軸線方向溝
７ 半径方向溝
１０ クランク軸
１１ 分割型軸受ハウジング
１２ 上軸受ハウジング
１３ 下軸受ハウジング
１４ 組合せ当接面 DESCRIPTION OF SYMBOLS 1 Slide bearing 2 Upper half-shaped bearing 3 Lower half-shaped bearing 4 Circumferential oil groove 4a Supply hole 5 Combination surface 6 Axial groove 7 Radial groove 10 Crankshaft 11 Split type bearing housing 12 Upper bearing housing 13 Lower bearing housing 14 Combination contact surface

Claims (3)

内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受において、
一対の前記半割形状軸受の周方向両端部で当接する組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記円周方向に直交する軸線方向に沿った軸線方向溝が、前記半割形状軸受の内周面側に開口することなく、前記半割形状軸受の幅方向端面の少なくとも一方側に開口すると共に、前記周方向油溝の周方向端部の溝底面と連通するように形成されることを特徴とするすべり軸受。 A pair of half bearings are combined to support a crankshaft of an internal combustion engine to form a cylindrical shape, and circumferential oil grooves along the circumferential direction are formed on the inner circumferential surface of the one half bearing. In the plain bearing formed to open to the surface,
Of the combination surfaces that contact at both circumferential ends of the pair of half bearings, at least the combination surface corresponding to the front side in the relative rotational direction of the crankshaft in the half bearing in which the circumferential oil grooves are formed The axial groove along the axial direction orthogonal to the circumferential direction opens to at least one side of the end surface in the width direction of the half-shaped bearing without opening to the inner circumferential surface side of the half-shaped bearing. In addition, the slide bearing is formed so as to communicate with the groove bottom surface of the circumferential end of the circumferential oil groove. 内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受において、
一対の前記半割形状軸受の周方向両端部で当接する組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記半割形状軸受の半径方向に沿った半径方向溝が前記周方向油溝の周方向端部の溝底面と連通するように形成されると共に、前記円周方向に直交する軸線方向に沿った軸線方向溝が形成され、
該軸線方向溝は、前記半割形状軸受の内周面側に開口することなく、前記半割形状軸受の幅方向端面の少なくとも一方側に開口すると共に、前記半径方向溝と連通するように形成されることを特徴とするすべり軸受。 A pair of half bearings are combined to support a crankshaft of an internal combustion engine to form a cylindrical shape, and circumferential oil grooves along the circumferential direction are formed on the inner circumferential surface of the one half bearing. In the plain bearing formed to open to the surface,
Of the combination surfaces that contact at both circumferential ends of the pair of half bearings, at least the combination surface corresponding to the front side in the relative rotational direction of the crankshaft in the half bearing in which the circumferential oil grooves are formed A radial groove along the radial direction of the half bearing is formed so as to communicate with a groove bottom surface at a circumferential end of the circumferential oil groove, and along an axial direction orthogonal to the circumferential direction. Axial groove is formed,
The axial groove is formed so as to open to at least one side of the end surface in the width direction of the half-shaped bearing and to communicate with the radial groove without opening to the inner peripheral surface side of the half-shaped bearing. A plain bearing characterized by being made. 内燃機関のクランク軸を支持するように一対の半割形状軸受を組み合わせて円筒形となり、一方の前記半割形状軸受の内周面には円周方向に沿った周方向油溝が周方向両端面に開口するように形成されたすべり軸受が、一対の分割型軸受ハウジングに前記半割形状軸受の周方向両端部で当接する組合せ面と前記分割型軸受ハウジングの組合せ当接面とが一致するように組み込まれたすべり軸受装置において、
一対の前記半割形状軸受の組合せ面のうち、少なくとも前記周方向油溝が形成された半割形状軸受における前記クランク軸の相対回転方向の前方側にあたる組合せ面には、前記半割形状軸受の半径方向に沿った半径方向溝が、前記半割形状軸受の外周面に開口すると共に、前記周方向油溝の周方向端部の溝底面と連通するように形成され、
前記一対の分割型軸受ハウジングの組合せ当接面のうち、前記半径方向溝が形成された側にあたる組合せ当接面の内周面側には、円周方向に直交する軸線方向に沿った軸線方向溝が、前記分割型軸受ハウジングの幅方向端面の少なくとも一方側に開口すると共に、前記半径方向溝と連通するように形成されることを特徴とするすべり軸受装置。 A pair of half bearings are combined to support a crankshaft of an internal combustion engine to form a cylindrical shape, and circumferential oil grooves along the circumferential direction are formed on the inner circumferential surface of the one half bearing. In the plain bearing formed so as to open to the surface, a combination surface that abuts the pair of split bearing housings at both ends in the circumferential direction of the half-shaped bearing coincides with a combination contact surface of the split bearing housing In the slide bearing device incorporated as follows:
Among the combination surfaces of the pair of half bearings, the combination surface corresponding to the front side in the relative rotation direction of the crankshaft in at least the half bearing in which the circumferential oil groove is formed includes the half bearing. A radial groove along the radial direction is formed to open to the outer peripheral surface of the halved bearing and to communicate with the groove bottom surface of the circumferential end of the circumferential oil groove,
An axial direction along the axial direction perpendicular to the circumferential direction is provided on the inner peripheral surface side of the combined contact surface corresponding to the side where the radial groove is formed, of the combined contact surfaces of the pair of split bearing housings. A plain bearing device, wherein a groove is formed to open to at least one side of the end surface in the width direction of the split bearing housing and to communicate with the radial groove.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021235031A1 (en) * 2020-05-21 2021-11-25 株式会社Ihi Bearing and supercharger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60231011A (en) * 1984-04-26 1985-11-16 Mazda Motor Corp Construction of crankshaft bearing part

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60231011A (en) * 1984-04-26 1985-11-16 Mazda Motor Corp Construction of crankshaft bearing part

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021235031A1 (en) * 2020-05-21 2021-11-25 株式会社Ihi Bearing and supercharger
CN114981548A (en) * 2020-05-21 2022-08-30 株式会社Ihi Bearing and supercharger

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