WO2011013481A1 - 軸受装置 - Google Patents
軸受装置 Download PDFInfo
- Publication number
- WO2011013481A1 WO2011013481A1 PCT/JP2010/061437 JP2010061437W WO2011013481A1 WO 2011013481 A1 WO2011013481 A1 WO 2011013481A1 JP 2010061437 W JP2010061437 W JP 2010061437W WO 2011013481 A1 WO2011013481 A1 WO 2011013481A1
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- WIPO (PCT)
- Prior art keywords
- bearing
- hole
- outer peripheral
- foreign matter
- bearing device
- Prior art date
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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
- 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
- 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
-
- 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
- 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
- F16C33/1085—Channels or passages to recirculate the liquid in the bearing
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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 bearing device, and more particularly, to a bearing device provided with a slide bearing that is excellent in discharging foreign matters.
- 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. 4).
- a plain bearing having such a crush relief as a notch as shown in FIG. 4, when the lubricating oil is supplied from the oil supply hole of the crankpin, the foreign matter mixed in the lubricating oil After being captured by the crushing relief, the crushing relief and the chamfered portion are discharged to the outside of the slide bearing through openings at both end surfaces which are side portions.
- Patent Documents 1 to 4 there has been proposed one in which a circumferential groove or a radial groove is formed on the back surface (outer peripheral surface) of the slide bearing to improve the lubricity of the sliding surface (for example, Patent Documents 1 to 4). Patent Document 3).
- the first aspect of the present invention provides a rotating shaft having an end portion of the oil supply hole opened on the outer peripheral surface, a cylindrical slide bearing that rotatably supports the rotating shaft, and the slide bearing.
- a bearing device comprising a housing for holding, When the rotary shaft is rotated, a radial through hole is formed at a predetermined position of the slide bearing so as to overlap with the movement locus of the end of the oil supply hole, and further, the slip is made in communication with the through hole.
- a foreign matter discharge groove penetrating in the axial direction is formed on the outer peripheral surface of the bearing.
- a second aspect of the present invention is a rotating shaft having an end portion of an oil supply hole opened on an outer peripheral surface, a cylindrical slide bearing that rotatably supports the rotating shaft, and the sliding bearing is held from the outer peripheral side.
- a bearing device including a housing for The sliding bearing is formed in a cylindrical shape by abutting the butting surfaces of a pair of half-cylindrical bearings having a semi-cylindrical shape, forming the through-hole penetrating in the radial direction in both the butting surfaces, A foreign matter discharge groove penetrating in the axial direction is formed in the inner peripheral surface of the housing so as to communicate with the opening on the outer peripheral side of the through hole.
- the foreign matter contained in the lubricating oil is captured by the through hole, and then passes through the through hole and is discharged to the outside from the openings on both end surfaces of the slide bearing through the foreign matter discharge groove. The Therefore, it is possible to provide a bearing device provided with a slide bearing with good foreign matter discharge performance.
- FIG. 1 is a cross-sectional view of a bearing device showing an embodiment of the present invention.
- FIG. 3 is a schematic diagram illustrating a state in which lubricating oil containing foreign matter is supplied to the portion illustrated in FIG. 2.
- Sectional drawing which shows the principal part of the conventional bearing apparatus.
- FIG. 6A shows a second embodiment of the present invention
- FIG. 6A is a perspective view of the main part of the second embodiment
- FIG. 6B is supplied with lubricating oil containing foreign matter at the location shown in FIG.
- the schematic diagram which shows the state made.
- FIG. 7A shows a third embodiment of the present invention
- FIG. 7A is a perspective view of the main part of the third embodiment
- FIG. 7B is supplied with lubricating oil containing foreign matter at the location shown in FIG.
- FIG. 8 (a) is a perspective view of the main part of the fourth embodiment of the present invention
- FIG. 8 (b) is supplied with lubricating oil containing foreign matter at the location shown in FIG. 8 (a).
- FIG. 9A shows a fifth embodiment of the present invention
- FIG. 9A is a perspective view of the main part of the fifth embodiment
- FIG. 9B is supplied with lubricating oil containing foreign matter at the location shown in FIG. 9A.
- FIG. 10A shows a sixth embodiment of the present invention
- FIG. 10A is a perspective view of the main part of the sixth embodiment
- FIG. 10B is a view in which lubricating oil containing foreign matter is supplied to the portion shown in FIG.
- FIG. 11A shows a seventh embodiment of the present invention
- FIG. 11A is a perspective view of the main part of the seventh embodiment
- FIG. 11B is a view in which lubricating oil containing foreign matter is supplied to the portion shown in FIG.
- FIG. 12A shows an eighth embodiment of the present invention
- FIG. 12A is a perspective view of an essential part of the eighth embodiment
- FIG. 12B is a diagram in which lubricating oil containing foreign matter is supplied to the portion shown in FIG.
- a bearing device 1 is held by a substantially cylindrical base portion 2 of a connecting rod and an inner peripheral surface of the base portion 2 to rotate a crank pin 3. And a cylindrical slide bearing 4 that freely supports the shaft.
- a base portion 2 as a housing for holding the plain bearing 4 includes a semi-cylindrical upper housing 2A formed at the lower end portion of the connecting rod body, and a semi-cylindrical cap 2B as a lower housing that is abutted on the lower side thereof.
- the upper housing 2A and the cap 2B are integrally connected by a bolt (not shown) in a state where the butting surface 2Aa of the upper housing 2A and the butting surface 2Ba of the cap 2B are in contact with each other.
- the outer peripheral surface of the slide bearing 4 is held by the inner peripheral surfaces 2C of both members connected in this way.
- the plain bearing 4 is composed of a pair of upper and lower half bearings 11 and 12 having a semi-cylindrical shape, and the butting surfaces 11A and 12A of the both half bearings 11 and 12 are butted against each other. It is configured in a cylindrical shape.
- the sliding bearing 4 rotatably supports a crankpin 3 (rotating shaft) of a crankshaft by a sliding surface 5 which is an inner peripheral surface of both the half bearings 11 and 12. Further, the outer peripheral surface 6 serving as the back surface of both the half bearings 11 and 12 is held by a base 2 as a housing of the connecting rod.
- the through-hole 7 penetrating in the radial direction is formed at the position of the both butted surfaces 11A, 12A of the slide bearing 4, and the through-hole 7 is continuously provided from the opening 7A on the outer peripheral surface 6 side.
- a foreign matter discharge groove 8 is provided in the axial direction of the outer peripheral surface 6.
- the through hole 7 is formed in the axial center portion of the slide bearing 4, and the inner diameter of the through hole 7 is set to a dimension that allows the largest foreign material 15 that is supposed to be mixed into the lubricating oil to pass. Has been. Further, the through hole 7 is formed at a position where it overlaps with the movement locus of the end portion 3B of the oil supply hole 3A when the crankpin 3 as the rotation shaft is rotated in the direction of the arrow. As a result, as shown in FIGS. 1 and 3, when the crankpin 3 is rotated in the direction of the arrow, the lubricating oil is supplied directly from the oil supply hole 3A of the crankpin 3 to the through hole 7. Yes.
- linear notches 11B and 12B that open to both end faces 9A and 9B along the axial direction are formed on the outer peripheral edges of both butted surfaces 11A and 12A so as to face each other.
- the foreign matter discharge groove 8 is constituted by the internal spaces of the portions 11B and 12B.
- the inner diameter of the through hole 7 is set to be larger than the inner diameter of the oil supply hole 3A of the crankpin 3, and the width of the foreign matter discharge groove 8 constituted by both the notches 11B and 12B is set to the through hole 7.
- the dimensions are set to be approximately the same as the inner diameter.
- the depth of the foreign matter discharge groove 8 is set to a dimension through which the foreign matter 15 having the maximum size assumed in advance can pass.
- the foreign matter discharge groove 8 in the present embodiment is covered radially outward by the inner peripheral surface 2C of the base portion 2, and therefore, the foreign matter discharge groove 8 continues from the through hole 7 at both end faces 9A and 9B. It functions as an open foreign matter discharge passage.
- the plain bearing 4 of the bearing device 1 in the present embodiment includes the radial through hole 7 and the foreign matter discharge groove 8 of the outer peripheral surface 6 communicating with the radial through hole 7, and therefore when the crank pin 3 is rotated.
- the lubricating oil is supplied to the through hole 3A, as shown in FIGS. 1 and 3, the end 3B of the lubricating hole 3A is superposed with the through hole 7, and the lubricating oil is directly supplied to the through hole 7.
- the Therefore, the foreign matter 15 mixed in the lubricating oil is captured in the through hole 7 together with the lubricating oil, and then discharged to the outside of the slide bearing 4 from the openings of the end faces 9A and 9B through the outer peripheral foreign matter discharge groove 8. Is done.
- FIG. 5 is a comparison of the foreign matter discharge test results for the product of the present invention shown in FIGS. 1 to 3 and the conventional product shown in FIG. 4 having a crush relief and a chamfered portion.
- the diameter of the through hole is set to 4 mm
- the depth of the foreign matter discharge groove is set to 0.3 mm
- the width is set to 2 mm.
- test conditions are shown on the right side of FIG.
- 2 pieces of iron-based foreign matter (1.0 mm: * 0.5 mm * t0.15 mm) of a predetermined size is provided for one clamp pin of the crankshaft in the lubricating oil supplied from the oil supply hole 3A of the crankpin 3.
- the lubricating oil is supplied to the sliding surface of the slide bearing 4.
- the result of counting the number of scratches of 10 ⁇ m or more generated on the sliding surface of the slide bearing is the test result shown on the left side of FIG.
- 13 scratches were generated in the conventional slide bearing, whereas in the slide bearing 1 of the present invention, there were less than 2 scratches. .
- the slide bearing 4 of the present invention is far superior in foreign matter discharging ability as compared with the conventional product.
- FIG. 6 shows a second embodiment of the present invention.
- the foreign matter discharge groove 8 is constituted by a pair of upper and lower linear grooves 11B and 12B. That is, as shown in FIG. 6A, a pair of linear grooves 11B and 12B along the axial direction are formed on the outer peripheral surface 6 of the plain bearing 4 so as to be orthogonal to the upper and lower ends of the opening 7A of the through-hole 7. Are formed apart from each other.
- the width and depth of each of the linear grooves 11B and 12B are set to a depth and a width that allow the foreign material 15 having an assumed size to pass with a margin.
- Other configurations are the same as those of the first embodiment described above. Even in the second embodiment having such a configuration, the same operations and effects as those of the first embodiment can be obtained.
- FIG. 7 shows a third embodiment of the present invention.
- the third embodiment instead of the notches 11B and 12B in the first embodiment, chamfered portions 11B and 12B are formed on the outer peripheral edge of the abutting surface, and an axial direction constituted by them is formed.
- the foreign matter discharge groove 8 is constituted by a linear groove.
- Other configurations are the same as those of the first embodiment described above. Even in the third embodiment having such a configuration, the same operations and effects as those of the first embodiment can be obtained.
- FIG. 8 shows a fourth embodiment of the present invention.
- a through hole 7 having a semicircular cross section is formed on the upper butting surface 11A, while a notch 12B similar to that of the first embodiment is formed on the outer peripheral edge of the lower butting surface 12A.
- the cutout portion 12B and the upper butting face 11A opposite to the cutout portion 12B constitute an axial foreign matter discharge groove 8.
- the foreign matter discharge groove 8 is configured to communicate with the opening 7A of the through hole 7. ing.
- 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 described above.
- FIG. 9 shows a fifth embodiment of the present invention.
- a through hole 7 having a semicircular cross section similar to that shown in FIG. 8 is formed on the upper abutting surface 11A, while a chamfered portion 12B is formed on the outer peripheral edge of the lower abutting surface 12A.
- a foreign matter discharge groove 8 is formed by an axial linear groove formed by the chamfered portion 12B and the upper butting surface 11A facing the chamfered portion 12B.
- the foreign matter discharge groove 8 is formed with the opening 7A of the through-hole 7. Communicate. Even in the fifth embodiment having such a configuration, it is possible to obtain the same operations and effects as those of the first embodiment described above.
- FIG. 10 shows a sixth embodiment of the present invention.
- the plain bearing 4 is composed of a pair of half bearings 11 and 12, and the through holes 7 and the foreign matter discharge grooves 8 are formed at the butted surfaces 11A and 12A or adjacent positions.
- the present invention is applied to the plain bearing 4 formed in a single cylindrical shape. That is, a through hole 7 that penetrates from the sliding surface 5 to the outer peripheral surface 6 in the radial direction is formed at a predetermined position in the circumferential direction of the slide bearing 4, and the outer peripheral surface 6 has the through hole 7.
- a linear groove in the axial direction is formed perpendicular to the outer opening 7A, and the foreign matter discharge groove 8 is constituted by the linear groove.
- the through hole 7 is formed at a position that overlaps with the movement locus of the end 3B of the oil supply hole 3A when the crank pin 3 is rotated.
- the diameter of the through-hole 7 is also set to a dimension that allows the foreign object 15 to pass with a margin, as in the first embodiment.
- the width and depth of the foreign matter discharge groove 8 are set to the same dimensions as those in the first embodiment.
- Other configurations are the same as those in the first embodiment. Even in the sixth embodiment, the same operation and effect as the first embodiment can be obtained.
- FIG. 11 shows a seventh embodiment of the present invention.
- the position of the foreign matter discharge groove 8 in the sixth embodiment is slightly shifted downward. That is, the foreign matter discharge groove 8 is formed in the axial direction of the outer peripheral surface 6 so that the upper edge of the foreign matter discharge groove 8 overlaps with the lower end of the opening 7A outside the through hole 7.
- Other configurations are the same as those of the seventh embodiment shown in FIG. Even in the seventh embodiment, it is possible to obtain the same operation and effect as the first embodiment described above.
- FIG. 12 shows an eighth embodiment of the present invention.
- the foreign matter discharge groove 8 on the outer peripheral surface 6 of the slide bearing 4 is omitted. Instead, it is formed on the inner peripheral surface 2C of the base 2 on the connecting rod side. That is, a pair of linear notches 2Ab and 2Bb along the axial direction are formed on the inner peripheral edges of the butted surfaces 2Aa and 2Ba in the base 2 so as to overlap with the openings 7A of the through holes 7 on the slide bearing 4 side. Is formed.
- a foreign matter discharge groove 8 is constituted by the internal spaces of the notches 2Ab and 2Bb.
- the foreign matter 15 captured by the through hole 7 of the slide bearing 4 is discharged to the outside of the slide bearing 4 by the foreign matter discharge groove 8 on the base 2 side communicating with the through hole 7. It has become so. 12 shows an example of a rectangular discharge groove, a chamfered shape as shown in FIG. 7 may be used. In the eighth embodiment, the same operation and effect as in the first embodiment can be obtained.
- FIG. 13 shows another embodiment of the present invention.
- the crush reliefs 11C and 12C made of notches are formed on the sliding surface 5 on the inner peripheral side of the butted surfaces 11A and 12A in the half bearings 11 and 12, and both butted surfaces 11A are formed.
- the through-hole 7 in the radial direction and the foreign matter discharge groove 8 communicating with the radial through-hole 7 are formed in the slide bearing 4 as in the first embodiment. It is.
- Bearing device 2.
- Base (housing) 3
- Crank pin (rotary shaft) 3A
- Oil supply hole 4 ...
- Slide bearing 6 ...
- Outer peripheral surface 7 ...
- Through hole 8 ...
- Foreign material discharge groove 11 ...
- Half bearing 12 ...
- Half bearing 15 ...
Abstract
Description
また、従来、すべり軸受における背面(外周面)に円周方向溝や半径方向溝を形成して、摺動面の潤滑性を向上させるようにしたものが提案されている(例えば特許文献1~特許文献3)。
他方、特許文献1および特許文献2のすべり軸受においては、外周面に円周方向のくぼみや直線状溝を設けてそこに異物を堆積させる構成となっているので、これらのすべり軸受においては、潤滑油に含まれる異物の排出性が良好ではなかった。
また、特許文献3のすべり軸受においては、すべり軸受の外周面に軸方向溝を設けるとともに、該軸方向溝から連続する半径方向の貫通孔を備えている。しかしながら、この特許文献3のすべり軸受においては、すべり軸受全体が潤滑油中に浸漬される構成となっているので、回転軸の給油孔からすべり軸受に給油する場合及びその場合における潤滑油中の異物と上記半径方向の貫通孔の配置位置については特に考慮されていなかった。
上記回転軸が回転される際に、上記給油孔の端部の移動軌跡と重合するように上記すべり軸受の所定位置に半径方向の貫通孔を形成し、さらに、該貫通孔と連通させてすべり軸受の外周面に軸方向に貫通する異物排出溝を形成したものである。
また、第2の本発明は、給油孔の端部を外周面に開口させた回転軸と、この回転軸を回転自在に軸支する円筒状のすべり軸受と、このすべり軸受を外周側から保持するハウジングとを備えた軸受装置において、
上記すべり軸受は、半円筒状をした一対の半割り軸受の突き合わせ面を当接させて円筒状に形成されており、上記両突き合わせ面に半径方向に貫通する上記貫通孔を形成し、さらに、上記貫通孔の外周側の開口部と連通させて上記ハウジングの内周面に軸方向に貫通する異物排出溝を形成したものである。
すべり軸受4を保持するハウジングとしての基部2は、コンロッド本体の下端部に形成された半円筒状の上部ハウジング2Aと、これに下方側から突き合わされる下部ハウジングとしての半円筒状のキャップ2Bとから構成されている。上部ハウジング2Aの突き合わせ面2Aaとキャップ2Bの突き合わせ面2Baを相互に当接させた状態で図示しないボルトによって上部ハウジング2Aとキャップ2Bが一体に連結されている。そのように連結された両部材の内周面2Cによってすべり軸受4の外周面が保持されている。
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3の給油孔3A内に供給される。この給油孔3Aの端部3Bは、クランクピン3の外周部の所定位置に開口させている。そのため、給油孔3A内に供給された潤滑油は、クランクピン3が矢印方向に回転されることに伴って給油孔3Aの端部3Bからすべり軸受4の摺動面5に供給されるようになっている。それにより、すべり軸受4の摺動面5の潤滑が行なわれるようになっている。
すなわち、両半割り軸受11、12における一側の両突き合わせ面11A、12Aの位置には、それら両突き合わせ面11A、12Aに軸心が一致するように半径方向に貫通する断面円形の貫通孔7が穿設されている。貫通孔7は、すべり軸受4における軸方向の中央部分に穿設されており、貫通孔7の内径は、潤滑油に混入されることが想定される最大の異物15が通過可能な寸法に設定されている。
また、この貫通孔7は、回転軸としてのクランクピン3が矢印方向に回転される際に、上記給油孔3Aの端部3Bの移動軌跡と重合する位置に形成されている。それにより、図1および図3に示すように、クランクピン3が矢印方向に回転される際には、クランクピン3の給油孔3Aから直接貫通孔7に潤滑油が供給されるようになっている。
上記貫通孔7の内径は上記クランクピン3の給油孔3Aの内径より大きく設定されており、また、上記両方の切欠き部11B、12Bによって構成される異物排出溝8の幅は上記貫通孔7の内径と略同じ寸法に設定されている。また、異物排出溝8の深さは、予め想定した最大の大きさの異物15が通過できる寸法に設定されている。
本実施例における異物排出溝8は、その半径方向外方を基部2の内周面2Cによって覆われており、従って、異物排出溝8は上記貫通孔7から連続して両端面9A、9Bで開口する異物排出通路として機能するようになっている。
ここで、図2の本発明においては、貫通孔の直径を4mmに設定してあり、異物排出溝の深さは0.3mmに設定し、幅は2mmに設定したものである。
また、図5の右方側には試験条件を示している。ここでは、クランクピン3の給油孔3Aから供給する潤滑油の中に、クランクシャフトのクランプピン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4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5の左側に示した試験結果である。
この図5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本発明品のすべり軸受4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。
このような構成の第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。
このような構成の第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。
このような第4実施例であっても、上述した第1実施例と同様の作用・効果を得ることができる。
このような構成の第5実施例であっても、上述した第1実施例と同様の作用・効果を得ることができる。
貫通孔7は、上記第1実施例の場合と同様に、クランクピン3が回転される際における給油孔3Aの端部3Bの移動軌跡と重合する位置に形成されている。また、貫通孔7の直径も上記第1実施例と同様に、異物15が余裕を持って通過できる寸法に設定されている。また、異物排出溝8の幅と深さは上記第1実施例のものと同様の寸法に設定されている。その他の構成は上記第1実施例と同じである。
このような第6実施例であっても第1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7実施例であっても、上述した第1実施例と同様の作用・効果を得ることができる。
すなわち、基部2における突き合わせ面2Aa、2Baの内周縁には、すべり軸受4側の貫通孔7の開口7Aと重合するように、軸方向に沿った一対の直線状の切欠き部2Ab、2Bbが形成されている。これら両切欠き部2Ab、2Bbの内部空間によって異物排出溝8が構成されている。このような構成の第8実施例においても、すべり軸受4の貫通孔7によって捕捉された異物15は、貫通孔7に連通する基部2側の異物排出溝8によってすべり軸受4の外部へ排出されるようになっている。また、図12は角形の排出溝の例を示すが、図7のような面取り形状でもよい。
このような第8実施例においても上記第1実施例と同様の作用・効果を得ることができる。
このように、従来公知のクラッシリリーフ11C、12Cと面取り部11D、12Dを備えたすべり軸受4において、上記図2と図6~図12の各実施例に示したような貫通孔7とそれに連通する異物排出溝8を形成するようにしても良い。
なお、上記各実施例は、コンロッド用の軸受装置1に本発明を適用した場合について説明したが、クランクシャフトをシリンダーブロック側で軸支するメインベアリングにも本発明を適用することができる。その場合には、シリンダーブロックがすべり軸受を保持するためのハウジングとなる。
3‥クランクピン(回転軸) 3A‥給油孔
4‥すべり軸受 6‥外周面
7‥貫通孔 8‥異物排出溝
11‥半割り軸受 12‥半割り軸受
15‥異物
Claims (11)
- 給油孔の端部を外周面に開口させた回転軸と、この回転軸を回転自在に軸支する円筒状のすべり軸受と、このすべり軸受を保持するハウジングとを備えた軸受装置において、
上記回転軸が回転される際に、上記給油孔の端部の移動軌跡と重合するように上記すべり軸受の所定位置に半径方向の貫通孔を形成し、さらに、該貫通孔と連通させてすべり軸受の外周面に軸方向に貫通する異物排出溝を形成したことを特徴とする軸受装置。 - 上記すべり軸受は、一対の半割り軸受の突き合わせ面を相互に当接させて円筒状に形成されており、上記貫通孔は、上記両半割り軸受における突き合わせ面とそれらの隣接位置にわたって形成されていることを特徴とする請求項1に記載の軸受装置。
- 上記両突き合わせ面の外周縁となる両半割り軸受の外周面にそれぞれ軸方向の切欠き部が形成されており、それら両切欠き部によって上記異物排出溝が構成されることを特徴とする請求項2に記載の軸受装置。
- 上記両突き合わせ面の外周縁から離隔させて軸方向に伸びる直線状溝が両半割り軸受の外周面にそれぞれ形成されており、それら両直線状溝によって上記異物排出溝が形成されることを特徴とする請求項2に記載の軸受装置。
- 上記両突き合わせ面の外周縁となる両半割り軸受の外周面にそれぞれ面取り部が形成されており、それら両面取り部によって上記異物排出溝が構成されることを特徴とする請求項2に記載の軸受装置。
- 上記すべり軸受は、一対の半割り軸受の突き合わせ面を相互に当接させて円筒状に形成されており、上記貫通孔は、上記両突き合わせ面に隣接する一方の半割り軸受のみに形成されていることを特徴とする請求項1に記載の軸受装置。
- 一方の半割り軸受に上記貫通孔が形成されており、他方の半割り軸受の突き合わせ面の外周縁の軸方向に切欠き部が形成されており、該切欠き部とそれに対向する他方の突き合わせ面とによって上記異物排出溝が構成されることを特徴とする請求項6に記載の軸受装置。
- 一方の半割り軸受に上記貫通孔が形成されており、他方の半割り軸受の突き合わせ面の外周縁の軸方向に面取り部が形成されており、該面取り部とそれに対向する他方の突き合わせ面とによって上記異物排出溝が構成されることを特徴とする請求項6に記載の軸受装置。
- 上記各半割り軸受の内周面には、上記突き合わせ面の隣接位置にそれぞれクラッシリリーフが形成されるとともに、両突き合わせ面の内周縁にはそれぞれ面取り部が形成されていることを特徴とする請求項2から請求項8のいずれかに記載の軸受装置。
- 給油孔の端部を外周面に開口させた回転軸と、この回転軸を回転自在に軸支する円筒状のすべり軸受と、このすべり軸受を外周側から保持するハウジングとを備えた軸受装置において、
上記すべり軸受は、半円筒状をした一対の半割り軸受の突き合わせ面を当接させて円筒状に形成されており、
上記両突き合わせ面に半径方向に貫通する上記貫通孔を形成し、さらに、上記貫通孔の外周側の開口部と連通させて上記ハウジングの内周面に軸方向に貫通する異物排出溝を形成したことを特徴とする軸受装置。 - 上記各半割り軸受の内周面には、上記突き合わせ面の隣接位置にそれぞれクラッシリリーフが形成されるとともに、両突き合わせ面の内周縁にはそれぞれ面取り部が形成されていることを特徴とする請求項10に記載の軸受装置。
Priority Applications (5)
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CN2010800334765A CN102472319A (zh) | 2009-07-29 | 2010-07-06 | 轴承装置 |
KR1020127001984A KR101451672B1 (ko) | 2009-07-29 | 2010-07-06 | 베어링 장치 |
IN807DEN2012 IN2012DN00807A (ja) | 2009-07-29 | 2010-07-06 | |
US13/387,868 US20120128286A1 (en) | 2009-07-29 | 2010-07-06 | Bearing apparatus |
EP10804228.4A EP2461054B1 (en) | 2009-07-29 | 2010-07-06 | Bearing device |
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JP2009176522A JP5455491B2 (ja) | 2009-07-29 | 2009-07-29 | 軸受装置 |
JP2009-176522 | 2009-07-29 |
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DE102010040158B4 (de) * | 2010-09-02 | 2017-12-21 | Federal-Mogul Wiesbaden Gmbh | Strukturierte Schmutzdepots in Gleitlageroberflächen |
JP5699658B2 (ja) | 2011-02-10 | 2015-04-15 | 日本電気株式会社 | 待機系計算機、クラスタシステム、サービス提供方法およびプログラム |
KR101529081B1 (ko) * | 2012-08-02 | 2015-06-16 | 삼성테크윈 주식회사 | 누유 방지 기능을 구비한 베어링 지지 조립체 |
CN105517756B (zh) * | 2014-07-11 | 2017-06-13 | 东芝机械株式会社 | 具备异物排出机构的工业机械 |
JP6700660B2 (ja) * | 2015-01-14 | 2020-05-27 | 三菱重工業株式会社 | 回転軸機構およびポンプ |
CN104728270B (zh) * | 2015-03-28 | 2017-06-27 | 哈尔滨广瀚动力传动有限公司 | 一种用于两级行星齿轮装置连接筒的阻尼轴承 |
JP7044656B2 (ja) * | 2018-07-18 | 2022-03-30 | ヒューレット-パッカード デベロップメント カンパニー エル.ピー. | ベルトの駆動 |
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EP2461054A4 (en) | 2013-07-17 |
IN2012DN00807A (ja) | 2015-06-26 |
JP2011027243A (ja) | 2011-02-10 |
KR20140073375A (ko) | 2014-06-16 |
JP5455491B2 (ja) | 2014-03-26 |
EP2461054A1 (en) | 2012-06-06 |
EP2461054B1 (en) | 2016-06-22 |
CN102472319A (zh) | 2012-05-23 |
US20120128286A1 (en) | 2012-05-24 |
KR101451672B1 (ko) | 2014-10-16 |
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