WO2011013482A1 - すべり軸受 - Google Patents
すべり軸受 Download PDFInfo
- Publication number
- WO2011013482A1 WO2011013482A1 PCT/JP2010/061438 JP2010061438W WO2011013482A1 WO 2011013482 A1 WO2011013482 A1 WO 2011013482A1 JP 2010061438 W JP2010061438 W JP 2010061438W WO 2011013482 A1 WO2011013482 A1 WO 2011013482A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dust pocket
- foreign matter
- bearing
- groove
- inner peripheral
- Prior art date
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Classifications
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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
- 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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- 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
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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
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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
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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
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
- F16C17/246—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to wear, e.g. sensors for measuring wear
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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
- 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
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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
- 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
- F16C33/1055—Details of supply of the liquid to the bearing from radial inside, e.g. via a passage through the shaft and/or inner sleeve
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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
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
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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
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- 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
- F16C33/046—Brasses; Bushes; Linings divided or split, e.g. half-bearings or rolled sleeves
Definitions
- the present invention relates to a slide bearing, and more particularly, to a slide bearing configured in a cylindrical shape by abutting a pair of half bearings.
- a slide bearing in which a pair of half bearings are abutted to form a cylindrical shape, and a chamfered portion and a crush relief are provided on the inner peripheral portion of the abutting surface of each of the half bearings (see FIG. 6).
- a crush relief as a notch, as shown in FIG. 6, when the lubricating oil is supplied from the oil hole of the crankshaft, the foreign matters mixed in the lubricating oil are not affected by the crushing. After being captured by the relief, it is discharged to the outside from the opening of both sides of the crushing relief and the chamfered portion.
- Patent Documents 1 to 5 Conventionally, there has been proposed a slide bearing in which a foreign matter discharge groove is formed at a required portion of the sliding surface in order to capture foreign matter mixed in the lubricating oil and discharge it to the outside (for example, Patent Documents 1 to 5). 3).
- an oil groove is provided over the entire circumferential direction on the sliding surface of the lower half bearing, and a pair of openings that are branched from the oil groove and open at both axial end faces of the half bearing.
- a foreign matter discharge groove is formed.
- the plain bearing of Patent Document 2 is configured so that the rotating shaft is pivotally supported by a plurality of arc-shaped pads, and a T-shaped groove for capturing foreign matter is formed on the sliding surface of each arc-shaped pad.
- a magnet is installed at the bottom of the axial groove in the T-shaped groove.
- the magnet attracts and captures foreign matter in the axial groove.
- a plurality of linear foreign matter discharge grooves are formed along the axial direction in the vicinity of the abutting surface of the lower half bearing.
- the slide bearings disclosed in Patent Document 1 to Patent Document 3 described above have the following problems.
- an oil groove is provided in the entire circumferential direction of the sliding surface of the half bearing, and the foreign matter discharge groove is branched therefrom, so that the foreign matter circulates in the oil groove.
- the sliding bearing of Patent Document 2 since the T-shaped groove is formed at the center of the sliding surface in each of the arc-shaped pads, the area of the entire sliding surface is reduced, resulting in the load capacity of the sliding bearing. There is a problem that decreases.
- the plurality of axial grooves for discharging foreign matter are formed only in the lower half bearing to which a load is applied, so that it is difficult to efficiently discharge foreign matter. there were.
- the present invention is formed in a cylindrical shape by abutting the abutting surfaces of a pair of half bearings, and the rotation shaft can be freely rotated by a sliding surface composed of the inner peripheral surfaces of both the half bearings.
- plain bearings that are pivotally supported by A dust pocket made of a recess is formed on the sliding surface serving as the inner peripheral edge of the abutting surface, and at least one of the half bearings is continuous with the sliding pocket adjacent to the dust pocket from the dust pocket.
- a foreign matter discharge groove is provided at the end face in the axial direction.
- the foreign matter contained in the lubricating oil is first captured by the dust pocket, and then, through the foreign matter discharge groove communicating with the dust pocket, to the outside from the opening of the axial end surface of the slide bearing. Discharged. Therefore, as will be apparent from the test results described later, it is possible to provide a plain bearing that has a better foreign matter discharge performance than the conventional one.
- FIG. 1 is a cross-sectional view of a plain bearing and a crank pin showing an embodiment of the present invention.
- the perspective view which expanded the principal part in the slide bearing shown in FIG. The schematic diagram which shows the state in which the lubricating oil containing the foreign material was supplied to the principal part of FIG.
- the perspective view of the principal part which shows 2nd Example of this invention. The perspective view of the principal part which shows 3rd Example of this invention.
- the front view which shows the principal part of the conventional slide bearing.
- the figure which shows the test result and test conditions of the foreign material discharge property of the conventional product shown in FIG. 6 and the present invention product shown in FIG. The perspective view of the principal part which shows 4th Example of this invention.
- reference numeral 1 denotes a plain bearing provided on a connecting rod (not shown).
- the slide bearing 1 is composed of a pair of upper and lower half bearings 11 and 12 having a semi-cylindrical shape, and the abutting surfaces 11A and 12A of both the half bearings 11 and 12 are abutted with each other, thereby forming a cylindrical shape as a whole. It is configured.
- the sliding bearing 1 rotatably supports a crankpin 2 (rotating shaft) of a crankshaft by a sliding surface 3 that is an inner peripheral surface of both the half bearings 11 and 12.
- the lubricating oil When lubricating oil is discharged from an oil pump (not shown) toward the crankshaft, the lubricating oil is supplied into a lubricating oil passage (not shown) provided in the crankshaft and an oil supply hole 2A of the crankpin 2 connected thereto. It is like that.
- the lubricating oil supplied into the oil supply hole 2A is supplied to the sliding surface 3 which is the inner peripheral surface of both the half bearings 11 and 12 as the crank pin 2 is rotated in the direction of the arrow. It is like that. As a result, the sliding surface 3 of the slide bearing 1 is lubricated.
- the dust pocket 4 for capturing the foreign matter is provided on the sliding surface 3 which is the inner peripheral edge of the abutting surfaces 11A and 12A of the slide bearing 1, and the foreign matter discharge groove 5 is continuously provided from the dust pocket 4. 5 'is provided so that foreign matters mixed in the lubricating oil can be efficiently discharged to the outside. That is, as shown in FIG. 2, the axially central portion of the inner peripheral edge of each of the butted surfaces 11A and 12A on one side of the slide bearing 1 and the sliding surface 3 adjacent thereto are continuously connected to each other with the same dimensions.
- the rectangular pockets 11B and 12B are formed, and the dust pocket 4 for capturing foreign matter is formed by the concave portion formed by the continuous grooves 11B and 12B.
- the rectangular grooves 11B and 12B are continuous.
- a dust pocket 4 is formed as a rectangular recess. Further, the dust pocket 4 is disposed at a position on the movement locus of the tip of the oil supply hole 2A when the crank pin 2 is rotated. Therefore, when the crank pin 2 is rotated in the direction of the arrow, the lubricating oil is directly supplied to the dust pocket 4 through the oil supply hole 2A. And when the foreign material 6 is mixed in the supplied lubricating oil, it is capture
- each of the rectangular grooves 11B and 12B constituting the dust pocket 4 are set to dimensions that can accommodate and pass the maximum foreign material 6 assumed in advance. Then, on the sliding surface 3 of the lower half bearing 12 adjacent to the dust pocket 4, each axial end surface 12 ⁇ / b> C that becomes both side surfaces continuously from the lower end of the rectangular groove 12 ⁇ / b> B constituting the dust pocket 4. , 12C ′, and two linear grooves 12D and 12D ′ are formed in the opening.
- the pair of linear grooves 12D and 12D ′ constitute a lower foreign matter discharge groove 5 for discharging the foreign matter 6 to the outside.
- the linear grooves 12D and 12D ′ constituting the foreign matter discharge groove 5 are arranged on the sliding surface 3 as follows. That is, the axial end face 12C with respect to the end on the downstream side in the rotational direction of the crank pin 2 in the dust pocket 4 (square groove 12B) (the lower end of the square groove 12B) is connected to the inner end. Both linear grooves 12D and 12D ′ are arranged so as to be inclined with respect to the axial direction so that the outer end opening at 12C ′ is located downstream in the rotation direction of the crankpin 2.
- the widths and depths of the two linear grooves 12D and 12D ′ are set to dimensions that allow the largest foreign material 6 assumed in advance to pass with a margin.
- an upper foreign matter discharge groove 5 ′ is formed on the sliding surface 3 that is vertically symmetrical with the lower foreign matter discharge groove 5 across the inner peripheral edges of the upper and lower butting surfaces 11A and 12A.
- the foreign matter discharge groove 5 ′ extends from the upstream end portion (upper end portion of the rectangular groove 11B) of the crank pin 2 in the dust pocket 4 to the axial end surfaces 11C and 11C ′ and opens there. It is comprised from linear groove
- These linear grooves 11D and 11D ′ are arranged so that the outer ends of the linear grooves 11D and 11D ′ that open to the axial end faces 11C and 11C ′ have a rotation of the crankpin 2 rather than the inner ends that are connected to the dust pocket 4.
- both the linear grooves 11D and 11D ′ are set to dimensions that allow the largest foreign material 6 assumed in advance to pass with a margin.
- the dust pocket 4 is formed on the inner peripheral edge of the butted surfaces 11A and 12A of the upper and lower half bearings 11 and 12 and the sliding surface 3 which is adjacent to the inner peripheral edge. From there, two sets of upper and lower foreign matter discharge grooves 5, 5 'are formed.
- the dust pocket 4 and the foreign matter discharge grooves 5, 5 ′ are formed in the regions A1 and A2 on the inner peripheral surface where the crash relief has been formed in the conventionally known slide bearing. Is formed.
- the dust pocket 4 is formed on the inner peripheral edge of the abutting surfaces 11A and 12A of the slide bearing 1, so that the foreign matter 6 mixed in the lubricating oil can be efficiently captured. Moreover, the foreign matter 6 captured by the dust pocket 4 is efficiently discharged to the outside of the slide bearing 1 through the foreign matter discharge grooves 5 and 5 ′. Further, in the present embodiment, the foreign matter discharge groove 5 formed in the lower half bearing 12 has an outer end on the downstream side in the rotational direction of the crankpin 2 with respect to the inner end. It is arranged to be located.
- the foreign matter discharge grooves 5 and 5 ′ are provided at the upper and lower positions of the dust pocket 4, but the foreign matter discharge grooves 5 ′ of the upper half bearing 11 and The upper rectangular groove 11B constituting the dust pocket 4 may be omitted. That is, in this case, the dust pocket 4 (rectangular groove 12B) and the foreign substance discharge groove 5 that follows the dust pocket 4 are formed only on the lower half bearing 12 side.
- FIG. 4 shows a main part of the slide bearing 1 as the second embodiment of the present invention.
- the foreign matter discharge grooves 5 and (5 ′) are formed by the two sets of linear grooves 12D and 12D ′ (11D and 11D ′) continuous from the dust pocket 4.
- the foreign matter discharge grooves 5 and 5 ′ are formed by one linear groove 11D and 12D, respectively.
- the linear groove 11D in the upper half bearing 11 is inclined so as to open to one axial end surface 11C in the axial direction
- the linear groove 12D in the lower half bearing 12 has a shaft. It is inclined and arranged so as to open to the other axial end face 12C ′.
- the configuration of the dust pocket 4 is the same as that in the first embodiment.
- the same actions and effects as those of the first embodiment can be obtained.
- the lubricating oil is supplied from the oil supply hole 2A of the crank pin 2 to the dust pocket 4.
- the amount of lubricating oil discharged to the outside through the foreign matter discharge grooves 5, 5 ′ can be reduced more than that of the first embodiment. That is, the amount of lubricating oil leakage in the slide bearing 1 can be suppressed.
- FIG. 5 shows a main part of a plain bearing 1 as a third embodiment of the present invention.
- the foreign matter discharge grooves 5 and 5 ′ in the first embodiment are formed by a pair of linear grooves parallel to the axial direction of the slide bearing 1. That is, the foreign matter discharge grooves 5 and 5 ′ are formed by the linear grooves 11D and 12D that are continuous from the upper end and the lower end of the dust pocket 4 and parallel to the axial direction.
- the width and depth of both foreign matter discharge grooves 5, 5 ' are set to the same size.
- the structure of the dust pocket 4 is the same as that in the first embodiment.
- the foreign matter discharge grooves 5 and 5 ′ are provided in a direction orthogonal to the dust pocket 4, that is, in a direction orthogonal to the rotation direction of the crank pin 2.
- the foreign matter discharge grooves 5 and 5 ′ are provided at the upper and lower positions of the dust pocket 4, but the foreign matter discharge grooves 5 ′ and the dust pocket 4 of the upper half bearing 11 are provided.
- the upper rectangular groove 11 ⁇ / b> B that constitutes may be omitted. That is, in this case, the dust pocket 4 (rectangular groove 12B) and the foreign substance discharge groove 5 that follows the dust pocket 4 are formed only on the lower half bearing 12 side.
- the results of tests conducted on the foreign matter discharge performance of the sliding bearing 1 of the third embodiment shown in FIG. 5 and the conventional sliding bearing having the crush relief and the chamfered portion shown in FIG. 6 are shown.
- the conventionally known plain bearing shown in FIG. 6 has a chamfered portion formed on the inner peripheral edge of the abutting surface of both halved bearings and a notch on the inner peripheral surface that is adjacent to the chamfered portion.
- the crush relief which consists of a part is formed.
- the test conditions are shown on the right side of FIG.
- FIG. 8 shows a main part of a plain bearing 1 as a fourth embodiment of the present invention.
- rectangular grooves 11B and 12B are formed in the center of the inner peripheral edge of both abutting surfaces 11A and 12A so that the abutting surfaces 11A and 12A side gradually become deeper from the adjacent vertical positions.
- These rectangular grooves 11B and 12B constitute a dust pocket 4.
- notches 11D and 12D penetrating in the axial direction are formed on the inner peripheral edges of the both butted surfaces 11A and 12A so as to be orthogonal to the rectangular grooves 11B and 12B.
- These notches 11D and 12D constitute a straight foreign matter discharge groove 5.
- FIG. 9 shows a main part of a plain bearing 1 as a fifth embodiment of the present invention.
- a rectangular groove 11B is formed in the central portion of the inner peripheral edge of the butted surface 11A of the upper half bearing 11 and its adjacent position, and the butted 11A side gradually becomes deeper from the upper side. Is a dust pocket 4.
- a notch 12D that penetrates in the axial direction is formed on the inner peripheral edge of the abutting surface 12A of the lower half bearing 12, and a linear groove formed by the notch 12D and the abutting surface 11A on the upper side.
- the foreign matter discharge groove 5 is constituted by the above. Even in the fifth embodiment, it is possible to obtain the same operations and effects as the above embodiments.
- the arrangement positions of the dust pocket 4 and the foreign matter discharge groove 5 in the fifth embodiment may be upside down. That is, the dust pocket 4 (11B) may be formed on the inner peripheral edge of the lower abutting surface 12A, and the axial notch 12D may be formed on the inner peripheral edge of the upper abutting surface 11A.
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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)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
そして、従来、潤滑油に混入される異物を捕捉して外部へ排出するために、摺動面の所要箇所に異物排出溝を形成したすべり軸受が提案されている(例えば特許文献1~特許文献3)。
特許文献1のすべり軸受においては、下方側の半割り軸受の摺動面に周方向全域にわたって油溝を設けるとともに、該油溝から分岐させて半割り軸受の両軸方向端面に開口する一対の異物排出溝を形成している。
また、特許文献2のすべり軸受においては、複数の円弧状パッドによって回転軸を軸支するように構成されており、各円弧状パッドの摺動面に異物を捕捉するためのT字溝を形成し、かつ該T字溝における軸方向溝の底部にマグネットを設置している。そのマグネットによって軸方向溝内に異物を吸着して捕捉するようになっている。
さらに、特許文献3のすべり軸受においては、下方側の半割り軸受における突き合わせ面の近傍に、軸方向に沿って複数の直線状の異物排出溝を形成している。
つまり、特許文献1のすべり軸受においては、半割り軸受における摺動面の周方向全域に油溝が設けられて、そこから異物排出溝を分岐させているので、異物が油溝内を循環しやすくなり、異物排出溝によって異物を確実に捕捉するのが困難であり、異物が効率的に排出されにくいという欠点があった。
また、特許文献2のすべり軸受においては、上記各円弧状パッドにおける摺動面の中央にT字形溝が形成されているので、摺動面全体の面積が減少する結果となり、すべり軸受の負荷容量が低下するという問題がある。
さらに、特許文献3のすべり軸受においては、異物排出用の複数の軸方向溝は、荷重が掛かる下方側の半割り軸受のみに形成されているので、異物を効率的に排出しにくいという欠点があった。
上記突き合わせ面の内周縁となる摺動面に凹部からなるダストポケットを形成するとともに、上記ダストポケットの隣接位置となる摺動面に、上記ダストポケットから連続し、かつ上記半割り軸受における少なくとも一方の軸方向端面に開口する異物排出溝を設けたものである。
図示しないオイルポンプからクランクシャフトに向けて潤滑油が吐出されると、該潤滑油はクランクシャフトに設けられた図示しない潤滑油通路とそれに接続されたクランクピン2の給油孔2A内に供給されるようになっている。そして、この給油孔2A内に供給された潤滑油は、クランクピン2が矢印方向に回転されることに伴って両半割り軸受11、12の内周面である摺動面3に供給されるようになっている。それにより、すべり軸受1の摺動面3の潤滑が行なわれるようになっている。
すなわち、図2に示すように、すべり軸受1の一側である各突き合わせ面11A、12Aの内周縁の軸方向中央部およびその隣接となる摺動面3には、相互に連続させて同一寸法の方形溝11B、12Bが形成されており、連続した状態のそれら両方形溝11B、12Bからなる凹部によって異物を捕捉するダストポケット4が構成されている。
このように、本実施例においては、上下の半割り軸受11、12の左右両側の突き合わせ面11A、12Aを突き合わせて全体を円筒状に形成すると、上記方形溝11B、12Bが連続することにより、長方形の凹部としてのダストポケット4が構成されるようになっている。また、このダストポケット4は、上記クランクピン2が回転される際において、上記給油孔2Aの先端の移動軌跡上となる位置に配置されている。そのため、上記クランクピン2が矢印方向に回転される際には、給油孔2Aを介してダストポケット4に潤滑油が直接供給されるようになっている。そして、供給された潤滑油の中に異物6が混入している際には、ダストポケット4によって捕捉されるようになっている(図3参照)。
ダストポケット4を構成する各方形溝11B、12Bの幅(軸方向寸法)と深さは、予め想定した最大の異物6を収容して通過させることが可能な寸法に設定されている。
そして、上記ダストポケット4に隣接する下方側の半割り軸受12の摺動面3には、上記ダストポケット4を構成する方形溝12Bの下端部から連続して両側面となる各軸方向端面12C、12C’まで伸びて、そこに開口する2本の直線状溝12D、12D’が形成されている。そして、それら一対の直線状溝12D、12D’によって異物6を外部へ排出するための下方側の異物排出溝5が構成されている。
上記両直線状溝12D、12D’の幅と深さは、予め想定した最大の異物6が余裕をもって通過できる寸法に設定されている。
また、上下の突き合わせ面11A、12Aの内周縁を挟んで下方側の異物排出溝5と上下対称となる摺動面3に上方側の異物排出溝5’が形成されている。
この異物排出溝5’は、ダストポケット4におけるクランクピン2の回転方向の上流側端部(方形溝11Bの上端部)から両軸方向端面11C、11C’まで伸びてそこに開口する2本の直線状溝11D、11D’から構成されている。これら直線状溝11D、11D’は、ダストポケット4との接続側となる内方側の端部よりも軸方向端面11C、11C’に開口する外方側の端部が、クランクピン2の回転方向上流側に位置するように配置されている。
上記両直線状溝11D、11D’の幅と深さは、予め想定した最大の異物6が余裕をもって通過できる寸法に設定されている。
このように、本実施例のすべり軸受1においては、上下の半割り軸受11、12の突き合わせ面11A、12Aの内周縁とその隣接位置となる摺動面3にダストポケット4が形成されるとともに、そこから連続する上下2組の異物排出溝5、5’が形成されている。端的に言えば、本実施例のすべり軸受1においては、従来公知のすべり軸受においてクラッシリリーフを形成していた内周面の領域A1、A2に、上記ダストポケット4と異物排出溝5、5’を形成したものである。
以上のように、本実施例においては、すべり軸受1の突き合わせ面11A、12Aの内周縁にダストポケット4を形成したことにより、潤滑油中に混入した異物6を効率的に捕捉することができ、しかもダストポケット4で捕捉した異物6は異物排出溝5、5’を介して効率的にすべり軸受1の外部へ排出される。
また、本実施例においては、下方側の半割り軸受12に形成された異物排出溝5は、外方側の端部が内方側の端部よりもクランクピン2の回転方向の下流側に位置するように配置されている。そのため、クランクピン2の給油孔2Aがダストポケット4と連通していない状態であっても、クランクピン2の回転に伴って下方側の異物排出溝5内で潤滑油の下方側への流れがその粘性によって生じるので、効率的にダストポケット4内の異物6が異物排出溝5を介して外部へ排出される。
さらに、ダストポケット4から連続して上方側にも異物排出溝5’が形成されているので、ダストポケット4内の潤滑油が上方側の異物排出溝5’にも流通することで、ダストポケット4内の異物6がより一層効率的に外部へ排出されるようになっている。
なお、この図2および図3に示す第1実施例では、ダストポケット4の上下位置に異物排出溝5、5’を設けているが、上方側の半割り軸受11の異物排出溝5’とダストポケット4を構成する上方側の方形溝11Bを省略しても良い。つまり、その場合には、下方側の半割り軸受12側のみにダストポケット4(方形溝12B)とそれから続く異物排出溝5が形成される構成になる。
このような第2実施例のすべり軸受1であっても上記第1実施例と同様の作用・効果を得ることができる。また、この第2実施例においては、上記第1実施例と比較して異物排出溝5、5’の合計の流路面積が少ないので、クランクピン2の給油孔2Aからダストポケット4に潤滑油が供給された際に、異物排出溝5、5’を介して外部へ排出される潤滑油の排出量を上記第1実施例のものよりも減少させることができる。つまり、すべり軸受1における潤滑油の洩れ量を抑制することができる。
なお、この図5に示す第3実施例では、ダストポケット4の上下位置に異物排出溝5、5’を設けているが、上方側の半割り軸受11の異物排出溝5’とダストポケット4を構成する上方側の方形溝11Bを省略しても良い。つまり、その場合には、下方側の半割り軸受12側のみにダストポケット4(方形溝12B)とそれから続く異物排出溝5が形成される構成になる。
図7の右方側に示したものが試験条件である。つまり、クランクピンから供給する潤滑油の中に、クランクピン1つについて所定寸法の鉄系の異物(1.0mm:*0.5mm*t0.15mm)を2個投入し、その潤滑油をすべり軸受の摺動面に供給したものである。そして、すべり軸受の摺動面に生じる10μm以上の傷の本数を数えた結果が図7の左側に示した試験結果である。
この図7の試験結果から理解できるように、従来品のすべり軸受においては13本の傷が生じたのに対して、本発明品のすべり軸受1においては、傷は2本未満となっている。このように、従来品と比較すると図5に示した本発明品のすべり軸受の方が遥かに異物排出性に優れていることが理解できる。
このような第4実施例であっても上述した各実施例と同様の作用・効果を得ることができる。
このような第5実施例であっても、上記各実施例と同様の作用・効果を得ることができる。なお、この第5実施例におけるダストポケット4と異物排出溝5の配置位置は上下逆であってもよい。つまり、下方側の突き合わせ面12Aの内周縁にダストポケット4(11B)を形成し、上方側の突き合わせ面11Aの内周縁に軸方向の切欠き部12Dを形成しても良い。
2A‥給油孔 3‥摺動面
4‥ダストポケット 5、5’‥異物排出溝
6‥異物 11‥半割り軸受
11A‥突き合わせ面 12‥半割り軸受
12A‥突き合わせ面
Claims (10)
- 一対の半割り軸受の突き合わせ面を相互に突き合わせて円筒状に形成されて、上記両半割り軸受の内周面からなる摺動面によって回転軸を回転自在に軸支するようにしたすべり軸受において、
上記突き合わせ面の内周縁となる摺動面に凹部からなるダストポケットを形成するとともに、上記ダストポケットの隣接位置となる摺動面に、上記ダストポケットから連続し、かつ上記半割り軸受における少なくとも一方の軸方向端面に開口する異物排出溝を設けたことを特徴とするすべり軸受。 - 上記ダストポケットは、両突き合わせ面の内周縁にそれぞれ形成されて相互に連通する一対の方形溝からなることを特徴とする請求項1に記載のすべり軸受。
- 上記ダストポケットは、両突き合わせ面のいずれかの内周縁に形成された方形溝からなることを特徴とする請求項1に記載のすべり軸受。
- 上記異物排出溝は、上記ダストポケットにおける上記回転軸の回転方向の上流側端部から連続して半割り軸受の少なくとも一方の軸方向端面に開口する上流側の直線状溝と、上記ダストポケットにおける上記回転軸の回転方向の下流側端部から連続して半割り軸受の少なくとも一方の軸方向端面に開口する下流側の直線状溝とからなることを特徴とする請求項2または請求項3に記載のすべり軸受。
- 上記下流側の直線状溝は、軸方向端面に開口する外方側の端部が内方側の端部よりも、上記回転軸の回転方向下流側に位置するように配置されていることを特徴とする請求項4に記載のすべり軸受。
- 上記異物排出溝は、上記ダストポケットから連続して少なくともいずれかの半割り軸受の摺動面に軸方向に形成された直線状溝からなることを特徴とする請求項2または請求項3に記載のすべり軸受。
- 上記異物排出溝は、上記方形溝と交差し、かつ突き合わせ面の内周縁に軸方向に形成された切欠き部からなることを特徴とする請求項2または請求項3に記載のすべり軸受。
- 一方の半割り軸受の突き合わせ面の内周縁に上記ダストポケットが形成され、他方の半割り軸受の突き合わせ面の内周縁に軸方向の切欠き部が形成されて、該軸方向の切欠き部により上記異物排出溝が形成されることを特徴とする請求項3に記載のすべり軸受。
- 上記ダストポケットは、上記回転軸が回転される際に、該回転軸に設けられた給油孔の移動軌跡と重合する位置に設けられていることを特徴とする請求項1から請求項8のいずれかに記載のすべり軸受。
- 上記両半割り軸受における各突き合わせ面の内周縁の隣接位置である内周面には、切欠き部からなるクラッシリリーフが形成されており、該クラッシリリーフが形成された領域に上記ダストポケットおよび異物排出溝が形成されていることを特徴とする請求項1から請求項9のいずれかに記載のすべり軸受。
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CN201080033477.XA CN102472320B (zh) | 2009-07-29 | 2010-07-06 | 滑动轴承 |
EP10804229.2A EP2461055B1 (en) | 2009-07-29 | 2010-07-06 | Sliding bearing |
IN771DEN2012 IN2012DN00771A (ja) | 2009-07-29 | 2010-07-06 | |
US13/387,938 US8651742B2 (en) | 2009-07-29 | 2010-07-06 | Sliding bearing |
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EP (1) | EP2461055B1 (ja) |
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JP2011094746A (ja) * | 2009-10-30 | 2011-05-12 | Taiho Kogyo Co Ltd | すべり軸受 |
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JP5722758B2 (ja) * | 2011-12-16 | 2015-05-27 | 大同メタル工業株式会社 | 内燃機関のクランク軸用主軸受 |
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Also Published As
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JP5578308B2 (ja) | 2014-08-27 |
CN102472320B (zh) | 2015-01-14 |
KR20120031096A (ko) | 2012-03-29 |
IN2012DN00771A (ja) | 2015-06-26 |
CN102472320A (zh) | 2012-05-23 |
JP2011027244A (ja) | 2011-02-10 |
EP2461055B1 (en) | 2016-01-13 |
EP2461055A4 (en) | 2013-07-17 |
US8651742B2 (en) | 2014-02-18 |
US20120148179A1 (en) | 2012-06-14 |
EP2461055A1 (en) | 2012-06-06 |
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