WO2011052345A1 - すべり軸受 - Google Patents
すべり軸受 Download PDFInfo
- Publication number
- WO2011052345A1 WO2011052345A1 PCT/JP2010/067363 JP2010067363W WO2011052345A1 WO 2011052345 A1 WO2011052345 A1 WO 2011052345A1 JP 2010067363 W JP2010067363 W JP 2010067363W WO 2011052345 A1 WO2011052345 A1 WO 2011052345A1
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- WO
- WIPO (PCT)
- Prior art keywords
- foreign matter
- matter discharge
- discharge groove
- 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
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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
- F16C33/08—Attachment of brasses, bushes or linings to the bearing housing
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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
- F16C33/106—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
- 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
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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
- F16C33/046—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. 7).
- a crushing relief as a notch, as shown in FIG. 7, when lubricating oil is supplied from the oil hole of the crankshaft, foreign matter mixed in the lubricating oil is removed from the crushing bearing. 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). 4).
- a sliding bearing of Patent Document 1 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.
- an axial groove having a triangular cross section is provided on the inner peripheral edge of the abutting surface of the half bearing, and a circumferential groove is provided in a predetermined range of the sliding surface adjacent to the axial groove. Is forming.
- the slide bearings disclosed in Patent Document 1 to Patent Document 4 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 present invention is formed in a cylindrical shape by abutting the abutment surfaces of the upper half bearing and the lower half bearing with each other, and is formed of a sliding surface formed by the inner peripheral surfaces of the both half bearings.
- a slide bearing that rotatably supports a rotating shaft by a moving surface
- the sliding surface adjacent to the inner peripheral edge of the abutting surface in at least one of the upper half bearing or the lower half bearing is inclined with respect to the axial direction of the slide bearing and has an axial end surface.
- a foreign matter discharge groove having an open end is formed on at least one of these.
- the foreign matter contained in the lubricating oil is trapped in the foreign matter discharge groove, and then discharged to the outside of the slide bearing through the inclined foreign matter discharge groove as the rotating shaft rotates. . Therefore, it is possible to provide a slide bearing that has a better foreign matter dischargeability than conventional ones.
- 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 of the one side 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.
- channel shown in FIG. The figure which shows the installation range in the circumferential direction of the foreign material discharge groove
- 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 inner peripheral edge 4 of the abutting surfaces 11A and 12A and the sliding surface 3 adjacent thereto are provided with foreign matter discharge grooves 5, 5 ', and the foreign matter 6 mixed in the lubricating oil is removed. It is captured by the foreign matter discharge grooves 5, 5 ′ and can be discharged to the outside of the sliding surface 3. That is, as shown in FIG. 2, two linear grooves intersect each other on the sliding surface 3 adjacent to the inner peripheral edge 4 of the abutting surfaces 11A and 12A, which is one side of the slide bearing 1. Is formed.
- the first foreign matter discharge groove 5 is constituted by one straight groove
- the second foreign matter discharge groove 5 ′ is constituted by the other straight groove.
- Both the foreign matter discharge grooves 5 and 5 ′ are set to have the same width and depth, and both the foreign matter discharge grooves 5 and 5 ′ cross each other at the axial center portion 4 ⁇ / b> A in the inner peripheral edge 4.
- the sliding bearing 1 is disposed so as to be inclined with respect to the axial direction. That is, two foreign matter discharge grooves 5 and 5 ′ are formed so as to cross each other over the sliding surfaces 3 of the upper and lower half bearings 11 and 12 sandwiching the inner peripheral edge 4.
- An end portion 5 ⁇ / b> A on the upstream side in the rotational direction of the first foreign matter discharge groove 5 is open on one end face 8 in the axial direction of the upper half bearing 11, and the rotational direction in the foreign matter discharge groove 5.
- the end portion 5B on the downstream side is open on the other end surface 7 in the axial direction of the lower half bearing 12 (see FIGS. 2 and 4).
- the end portion 5A ′ on the upstream side in the rotational direction of the second foreign matter discharge groove 5 ′ opens to the end surface 7 of the upper half bearing 11, and the downstream side in the rotational direction of the foreign matter discharge groove 5 ′.
- the end portion 5B ′ is open to the end surface 8 of the lower half bearing 12.
- the foreign matter discharge grooves 5 and 5 ′ pass through the axial center portion 4 ⁇ / b> A of the inner peripheral edge 4 and end portions 5 ⁇ / b> A and 5 ⁇ / b> B (5 ⁇ / b> A ′ and 5 ⁇ / b> B ′) on the axial end surfaces 7 and 8 of the slide bearing 1. Is formed to open.
- the width W and the depth D of both foreign matter discharge grooves 5, 5 ′ are set to dimensions that allow the largest foreign matter 6 assumed in advance to be accommodated and passed therethrough.
- the cross-sectional shape of both foreign matter discharge grooves 5, 5 ′ is a trapezoid whose width W is slightly larger than depth D.
- both foreign matter discharge grooves 5, 5 ′ have a trapezoidal cross section that is gradually expanded from the bottom to the upper end opening, so the left and right side walls 5 ⁇ / b> C, 5 ⁇ / b> C are The inclined surface is inclined with respect to the sliding surface 3 adjacent thereto.
- the circumferential range ⁇ in which both foreign matter discharge grooves 5, 5 ′ are provided is approximately 25 before and after the inner peripheral edge 4 when no crush relief (notch) is set in the slide bearing 1. It is preferable to set within the range of °.
- the foreign matter discharge grooves 5, 5 ′ are preferably formed in the regions A1, A2 of the crush relief (see FIG. 2). .
- the inclination angles of both foreign matter discharge grooves 5, 5 ′ with respect to the axial direction of the slide bearing 1 are both set to 30 °.
- the lubricating oil is directly supplied into the foreign matter discharge grooves 5 and 5 ′ from the oil supply hole 2A. After that, the lubricating oil is discharged to the outside from both end faces 7 and 8 through the inside of the foreign matter discharge grooves 5 and 5 '.
- the lubricating oil is supplied in this way, as shown in the schematic diagram of FIG. 3, when the foreign matter 6 is included in the lubricating oil, the foreign matter 6 is an intersection of both foreign matter discharge grooves 5, 5 ′.
- FIG. 8 shows a second embodiment of the present invention.
- one foreign matter discharge groove 5 'in the first embodiment is omitted, and the other foreign matter discharge groove is shown. Only 5 is provided on the sliding surface 3.
- Other configurations are the same as those of the first embodiment, and the same member numbers are assigned to the respective parts corresponding to those of the first embodiment. Even in the second embodiment, the same operation and effect as the first embodiment can be obtained.
- FIG. 9 shows a third embodiment of the present invention.
- This third embodiment is located above the inner peripheral edge 4 in the foreign matter discharge grooves 5, 5 ′ of the first embodiment.
- the groove on the sliding surface 3 is omitted, and a linear groove on the lower side of the inner peripheral edge 4 is provided on the sliding surface 3. That is, the first foreign matter discharge groove 5 is formed from the central portion 4A in the axial direction of the inner peripheral edge 4 to the one end surface 7, and the second foreign matter is formed from the central portion 4A in the axial direction of the inner peripheral edge to the other end surface 8.
- a discharge groove 5 ' is formed.
- One ends 5A and 5A 'of both foreign matter discharge grooves 5, 5' communicate with each other at the axial central portion 4A of the inner peripheral edge 4, and the other end of the first foreign matter discharge groove 5 is a lower half bearing.
- the other end of the second foreign matter discharge groove 5 ′ is open to the end face 8 of the lower half bearing 12.
- Other configurations are the same as those of the first embodiment, and the same member numbers are assigned to the respective parts corresponding to those of the first embodiment. Even in the third embodiment, the same operation and effect as the first embodiment can be obtained.
- FIG. 10 shows a fourth embodiment of the present invention.
- the foreign matter discharge groove 5 is provided on the sliding surface 3 of the lower half bearing 12.
- the foreign matter discharge groove 5 is formed from the central portion 4A in the axial direction of the inner peripheral edge 4 to the end face 7.
- Other configurations are the same as those in the first embodiment. Even in the fourth embodiment, it is possible to obtain the same operation and effect as the first embodiment.
- FIG. 11 shows the fifth embodiment of the present invention.
- This fifth embodiment is the same as the second embodiment shown in FIG. Is made wider than the end portions 5A and 5B. More specifically, the width of the foreign matter discharge groove 5 in the central portion 4A is about 1.5 times the width of the foreign matter discharge groove 5 in the end portions 5A and 5B, and both ends from the position of the central portion 4A. The width of the foreign matter discharge groove 5 is gradually narrowed over the portions 5A and 5B.
- the depth of the foreign matter discharge groove 5 (5 ') is set to the same depth over the entire area.
- Other configurations are the same as those of the second embodiment shown in FIG. Even in the fifth embodiment, it is possible to obtain the same operations and effects as the above-described embodiments.
- FIG. 12 shows a sixth embodiment of the present invention.
- This sixth embodiment is the same as the second embodiment shown in FIG. 8, except that the depth of the foreign matter discharge groove 5 in the central portion 4A of the inner peripheral edge 4 is shown.
- the depth is deeper than the end portions 5A and 5B. More specifically, the depth of the foreign matter discharge groove 5 in the central portion 4A is about 1.5 times the depth of the foreign matter discharge groove 5 in the end portions 5A and 5B, both from the position of the central portion 4A.
- the depth of the foreign matter discharge groove 5 gradually decreases over the end portions 5A and 5B.
- the width of the foreign matter discharge groove 5 is set to the same width over the entire area. Other configurations are the same as those of the second embodiment shown in FIG.
- the width may be wider than the end portions 5A and 5B, and the depth may be deeper than the end portions 5A and 5B.
- FIG. 13 shows a seventh embodiment of the present invention.
- This seventh embodiment is a curved foreign substance in place of the linear foreign substance discharge groove 5 in the second embodiment of FIG.
- the discharge groove 5 is provided, and the width of the foreign matter discharge groove 5 at the central portion 4A of the inner peripheral edge 4 is wider than the end portions 5A and 5B.
- the depth of the foreign matter discharge groove 5 is set to the same depth throughout.
- Other configurations are the same as those of the second embodiment shown in FIG. Even in the seventh embodiment, it is possible to obtain the same operations and effects as the above-described embodiments.
- the foreign matter discharge groove 5 (5 ′) is provided in the slide bearing 1 that does not include the crush relief on the sliding surface 3 adjacent to the inner peripheral edge 4 of the abutting surfaces 11A and 12B.
- the foreign matter discharge groove 5 (5 ′) shown in each of the above-described embodiments is provided in the slide bearing 1 having the sliding relief 3 adjacent to the inner peripheral edge 4 of the abutting surfaces 11A and 12B. Of course, it may be provided.
- the chamfered portion of the inner peripheral edge 4 of the abutting surfaces 11A and 12B is not particularly mentioned, but whether or not the chamfered portion is formed on the inner peripheral edge 4 of the abutting surfaces 11A and 12B.
- the foreign matter discharge grooves 5 and 5 ′ of the present embodiment described above can be formed on the sliding surface 3 of the slide bearing 1.
- the foreign matter discharge groove 5 (5 ′) sufficiently secures a foreign matter discharge path, so that the amount of chamfering of the slide bearing 1 should be minimized. It is considered preferable from the viewpoint of securing hydraulic pressure.
- each Example mentioned above has demonstrated the case where the foreign material discharge groove
- a foreign matter discharge groove 5 (5 ') similar to that of each of the above-described embodiments may also be provided on the inner peripheral edge 4.
- the foreign matter discharge groove 5 (5 ′) on the other side (left side) is set so that the same setting as that on the one side (right side) in FIG. Is essential.
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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4)。
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。
また、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。
さらに、特許文献4のすべり軸受においては、半割り軸受の突き合わせ面の内周縁に断面三角形の軸方向溝を設けるとともに、該軸方向溝に隣接させて摺動面の所定範囲に円周方向溝を形成している。
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。
また、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。
さらに、特許文献4のすべり軸受は、上記円周方向溝で捕捉した異物を軸方向溝を経由して外部へ排出させているので、異物を効率的に排出しにくいという欠点があった。
上記上方側の半割り軸受もしくは下方側の半割り軸受の少なくとも一方における上記突き合わせ面の内周縁に隣接する摺動面に、すべり軸受の軸方向に対して傾斜させて、かつ、軸方向の端面の少なくとも一方に端部が開口する異物排出溝を形成したものである。
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(図1の時計方向)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の一側である突合せ面11A、12Aの内周縁4に隣接する摺動面3には、2本の直線状の溝が相互に交差するように形成されている。そして、一方の直線状の溝によって第1の異物排出溝5が構成されており、他方の直線状の溝によって第2の異物排出溝5’が構成されている。
第1の異物排出溝5における上記回転方向の上流側となる端部5Aは、上方側の半割り軸受11における軸方向の一方の端面8に開口しており、異物排出溝5における上記回転方向の下流側となる端部5Bは、下方側の半割り軸受12における軸方向の他方の端面7に開口している(図2、図4参照)。第2の異物排出溝5’における上記回転方向の上流側となる端部5A’は、上方側の半割り軸受11における端面7に開口し、異物排出溝5’における上記回転方向の下流側となる端部5B’は、下方側の半割り軸受12における端面8に開口している。
このように、異物排出溝5、5’は、内周縁4の軸方向の中央部4Aを通ってすべり軸受1における軸方向の端面7、8に端部5A、5B(5A’、5B’)が開口するように形成されている。両方の異物排出溝5、5’の幅Wと深さD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。図6に拡大して示すように、両方の異物排出溝5、5’の断面形状は、深さDよりも幅Wが少し大きな台形となっている。また、この図6に示すように、両異物排出溝5、5’は、底部から上端開口部にわたって徐々に拡開された台形状の断面をしているので、左右の側壁5C、5Cは、それらに隣接する摺動面3に対して傾斜した傾斜面となっている。
さらに、図4に示すように、すべり軸受1の軸方向に対して両方の異物排出溝5、5’が傾斜する傾斜角度はともに30°に設定されている。なお、この図4においては、突き合わせ面11A、12Aの内周縁4がすべり軸受1の軸方向と平行になっていることを前提として、内周縁4と異物排出溝5、5’とのなす角度として表示している。
また、すべり軸受1における内周縁4の軸方向の中央部4Aは、上記クランクピン2が回転される際における給油孔2Aの先端の移動軌跡上に位置している。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を介して両異物排出溝5、5’の交点となる内周縁4の中央部4A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、いずれかの異物排出溝5、5’によって捕捉されるようになっている(図3参照)。
このように潤滑油が供給される際、図3に模式図で示すように、潤滑油中に異物6が含まれている場合には、該異物6は両異物排出溝5、5’の交点の箇所で捕捉されてからいずれかの異物排出溝5、5’内を通って端面7、8に開口した端部5A、5B(5A’、5B’)からすべり軸受1の外部へ排出される。この時、両方の異物排出溝5、5’は、すべり軸受1の軸方向に対して傾斜させて設けられているので、異物排出溝5、5’内において潤滑油の下方側への流れがその粘性によって生じている。そのため、クランクピン2の回転に伴って異物排出溝5、5’内の異物6は軸方向に対して傾斜された側壁5C、5Cに案内されて迅速、かつ効率的にすべり軸受1の外部へ排出される。
したがって、本実施例によれば、従来と比較して異物排出性が良好なすべり軸受1を提供することができる。
このような第2実施例であっても、上記第1実施例と同様の作用・効果を得ることができる。
その他の構成は上記第1の実施例と同じであり、上記第1の実施例と対応する各部には同一の部材番号を付している。このような第3実施例であっても、上記第1実施例と同様の作用・効果を得ることができる。
その他の構成は、図8に示した第2実施例と同じである。このような第5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。
その他の構成は、図8に示した第2実施例と同じである。このような第6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。
なお、図示しないが、上述した第5実施例と第6実施例とを併せたもの、すなわち、図8に示す第2実施例において、内周縁4の中央部4Aにおける異物排出溝5の幅を端部5A、5Bよりも幅広にし、かつ、深さを端部5A、5Bよりも深くしたものとしてもよい。
その他の構成は、図8に示した第2実施例と同じである。このような第7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。
また、上記各実施例においては、突き合わせ面11A、12Bの内周縁4の面取り部については特に言及していないが、突き合わせ面11A、12Bの内周縁4に面取り部が形成されているか否かに拘わらず、すべり軸受1の摺動面3に上述した本実施例の異物排出溝5、5’を形成することができる。
なお、内周縁4に面取り部を形成する場合は、異物排出溝5(5’)によって異物の排出路が十分に確保されるので、すべり軸受1の面取り量を最小限にすることがエンジンの油圧確保の観点から好ましいと考えられる。
さらに、上述した各実施例は、図1における一側(右側)の内周縁4の箇所に異物排出溝5(5’)を設ける場合を説明しているが、図1における他側(左側)の内周縁4にも上述した各実施例と同様の異物排出溝5(5’)を設けても良いことは勿論である。但し、その場合は回転軸の回転方向に対して上述の図1における一側(右側)と同様の設定となるように、他側(左側)の異物排出溝5(5’)を設定することが肝要である。
3‥摺動面 4‥内周縁
5、5’‥異物排出溝 6‥異物
7、8‥端面 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)
- 上方側の半割り軸受と下方側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、
上記上方側の半割り軸受もしくは下方側の半割り軸受の少なくとも一方における上記突き合わせ面の内周縁に隣接する摺動面に、すべり軸受の軸方向に対して傾斜させて、かつ、軸方向の端面の少なくとも一方に端部が開口する異物排出溝を形成したことを特徴とするすべり軸受。 - 上記異物排出溝は、直線状の第1の異物排出溝とこれに交差する直線状の第2の異物排出溝とからなり、上記第1の異物排出溝は、上記内周縁の軸方向の中央部と交差し、かつ、すべり軸受の軸方向の一方の端面と他方の端面に両端が開口するように設けられており、上記第2の異物排出溝は、上記内周縁の軸方向中央部において上記第1の異物排出溝と交差し、かつ、すべり軸受の軸方向の一方の端面と他方の端面に両端が開口するように設けられてい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、上記内周縁の軸方向の中央部と交差し、かつ、すべり軸受の軸方向の一方の端面と他方の端面に両端が開口するように設けられた直線状の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、回転軸の回転方向下流側の半割り軸受に形成された第1の異物排出溝と第2の異物排出溝とからなり、上記第1の異物排出溝は、一方の端部が上記内周縁の軸方向の中央部に接続され、他方の端部が軸方向の一方の端面に開口する直線状の溝からなり、上記第2の異物排出溝は、一方の端部が上記内周縁の軸方向中央部に接続され、他方の端部が軸方向の他方の端面に開口する直線状の溝からなり、かつ第1の異物排出溝と第2の異物排出溝とが互いに連通してい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、回転軸の回転方向下流側の半割り軸受に形成された直線状の溝からなり、上記異物排出溝は、一方の端部が上記内周縁の軸方向の中央部に接続され、他方の端部が軸方向の一方の端面に開口することを特徴とする請求項1に記載のすべり軸受。
- 上記異物排出溝における内周縁の中央部における溝の幅は、上記両端面に開口した端部における溝の幅よりも幅が広くなっていることを特徴とする請求項3に記載のすべり軸受。
- 上記異物排出溝における内周縁の中央部における溝の深さは、上記両端面に開口した端部の溝の深さよりも深くなっていることを特徴とする請求項3または請求項6に記載のすべり軸受。
- 上記異物排出溝は、上記内周縁の軸方向の中央部と交差し、かつ、軸方向の一方の端面と他方の端面に両端が開口するように設けられた曲線状の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。
- 上記内周縁に隣接する摺動面には、切欠き部からなるクラッシリリーフが形成されており、上記異物排出溝は、上記クラッシリリーフが形成された領域内に設けられていることを特徴とする請求項1~請求項8のいずれかに記載のすべり軸受。
- 上記異物排出溝は、上記内周縁に隣接する摺動面に円周方向の25°の範囲内に形成されていることを特徴とする請求項1~請求項8のいずれかに記載のすべり軸受。
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US13/502,631 US8616774B2 (en) | 2009-10-30 | 2010-10-04 | Sliding bearing |
EP10826479.7A EP2495465A4 (en) | 2009-10-30 | 2010-10-04 | SMOOTH BEARING |
CN2010800486039A CN102597553A (zh) | 2009-10-30 | 2010-10-04 | 滑动轴承 |
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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 |
JP2014119080A (ja) * | 2012-12-19 | 2014-06-30 | Hitachi Ltd | すべり軸受装置 |
JP6588015B2 (ja) * | 2014-07-11 | 2019-10-09 | 東芝機械株式会社 | 異物排出機構を備えた産業機械 |
JP6314103B2 (ja) * | 2015-02-27 | 2018-04-18 | 大豊工業株式会社 | すべり軸受 |
BR102016004885B1 (pt) * | 2015-03-05 | 2022-09-13 | Roller Bearing Company Of America, Inc | Arranjo de haste de rotação |
JP6433393B2 (ja) * | 2015-09-02 | 2018-12-05 | 大豊工業株式会社 | 軸受及びその製造方法 |
CN106089984B (zh) * | 2016-08-31 | 2019-10-25 | 樊勇 | 一种循环自排污自布润滑油膜的径向滑动轴承副 |
US10233970B2 (en) * | 2017-01-10 | 2019-03-19 | GM Global Technology Operations LLC | Journal bearings with surface features for improved bearing oil supply |
USD906255S1 (en) * | 2017-02-23 | 2020-12-29 | Taiho Kogyo Co., Ltd. | Bushing |
KR20190057533A (ko) * | 2017-11-20 | 2019-05-29 | 두산공작기계 주식회사 | 공작 기계용 슬라이드 베어링 |
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US20120201485A1 (en) | 2012-08-09 |
EP2495465A1 (en) | 2012-09-05 |
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JP2011094746A (ja) | 2011-05-12 |
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US8616774B2 (en) | 2013-12-31 |
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