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1. 发明专利

JPH09229067A SINTERED OIL IMPREGNATED BEARING 失效
公开(公告)号：JPH09229067A
公开(公告)日：1997-09-02
申请号：JP6360697
申请日：1997-03-17
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD
发明人： KANEZAKI NOBORU , FUJITA KOSAKU , KIKUTA TOMOYUKI , OBA DAISUKE
IPC分类号： F16C33/10
摘要： PROBLEM TO BE SOLVED: To restrain fluctuation in the friction coefficient to the low level and prolong the service life by providing a sliding surface without a cavity over the whole circumferential region at one end of the inner circumferential surface of bearing hole, and making the other part contiguous thereto a porous part for supplying lubricant. SOLUTION: On an inner circumferential surface 5 of bearing hole 4, a first sliding surface 6 is formed without a pore over the whole circumferential region from the axial center to one opening end side, and being contiguous thereto a second slide surface 7 is formed with a high pore ratio toward the other opening end. As for the manufacturing method, after law material powder is filled in a change chamber R of metal mold D, pressure formation is applied thereto by an upper punch 9 and punching out a lower punch 10 upward, and an upper step part forming a recess 11a of core rod 11 upon the punching out operation pressurize the law material powder in the chamber R so that pores are fill(4 up thereby. Accordingly the friction coefficient with a rotation shaft 2 is kept law and the balance of oil Pressure is kept constant through supply of lubricant to the second slide surface 7, thereby keeping low the fluctuation of friction coefficient, leading to extension of service life.

2. 发明专利

JPH04307111A OIL-IMPREGNATED SINTERED BEARING AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04307111A
公开(公告)日：1992-10-29
申请号：JP9954491
申请日：1991-04-04
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD
发明人： KANEZAKI NOBORU , TANAKA TAKESHI , HAYASHI YOSHIAKI
IPC分类号： B22F5/00 , B22F3/11 , B22F5/12 , F16C33/06 , F16C33/10 , F16C33/14
摘要： PURPOSE:To provide such an oil-impregnated sintered bearing as excellent in a frictional characteristic and its manufacture in addition. CONSTITUTION:In an oil-impregnated bearing provided with a bearing hole 12, where a turning shaft 11 is inserted thereinto, in a bearing body 10 formed by a porous sintered alloy, it is made up of crushing a hole in a sliding surface 13 along an axial direction, where the turning shaft 11 is sliding, out of an inner circumferential surface of the bearing hole 12. In addition, at time of compressed powder forming, this oil-retaining bearing is manufactured by sintering this compressed powder after crushing the hole of a part coming into contact with a roughing part 19 by way of forming a through hole, serving as the bearing hole 12, through a rod 17 formed with this roughing part 19. Since the hole of the sliding surface 13 is crushed, lubricating oil on the sliding surface is in no case leaked out, thus a firm oil film with no oil-pressure drop is formed on the sliding surface, through which any local contact between the turning shaft 11 and the sliding surface 13 is prevented from occurring, thereby making a frictional factor in the bearing reducible.

3. 发明专利

JPH07197934A SINTERED OIL-CONTAINED BEARING 失效
公开(公告)号：JPH07197934A
公开(公告)日：1995-08-01
申请号：JP33863193
申请日：1993-12-28
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD
发明人： KANEZAKI NOBORU , MURAYAMA SATOSHI , TANAKA TAKESHI , OBA DAISUKE
IPC分类号： F16C33/10
摘要： PURPOSE:To elongate life by suppressing fluctuation of a sliding range between a sliding surface and a rotary shaft, and thereby suppressing the fluctuation of a frictional coefficient. CONSTITUTION:A bearing port 4 to which a rotary shaft 2 is inserted is arranged on a bearing main body 3 made of porous sintered alloy. Pores are collapsed to form a solding surface 6 which is located on an area in a circumferential direction of an inner peripheral surface 5 of the bearing port 4. The sliding surface 6 is composed of, in a circumferential direction of the inner peripheral surface 5, a first sliding part 7 having a porosity (k) and a second sliding part 8 which is continued from the first sliding part 7 and has porosity increased gradually from the value (k) in the circumferential direction.

4. 发明专利

JPH06123312A SINTERED OIL-RETAINING BEARING 失效
公开(公告)号：JPH06123312A
公开(公告)日：1994-05-06
申请号：JP7988993
申请日：1993-04-06
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD , NIPPON DENSO CO
发明人： KANEZAKI NOBORU , MURAYAMA SATOSHI , TANAKA TAKESHI , OBA DAISUKE
IPC分类号： F16C33/10
摘要： PURPOSE:To secure lubrication between the inner surface of a bearing and a rotary shaft of a sintered oil-retaining bearing even in the case where the inserted rotary shaft is rotated under the inclined condition. CONSTITUTION:In a sintered oil-retaining bearing 10 is formed in a bearing main body 11 made of porous sintered alloy a bearing hole 13, in which a rotary shaft 2 is to be inserted. In this sintered oil-retaining bearing 10, parts of the inner peripheral surface of the hole 13 near body the openings of the bearing hole 13 are crashed to form sliding surfaces S1-S4 13 at point-symmetrical positions around of the intermediate point of the longitudinal direction of the center line of the bearing hole 13.

5. 发明专利

JPH07233817A SINTERED OIL RETAINING BEARING AND ITS MANUFACTURE 失效
公开(公告)号：JPH07233817A
公开(公告)日：1995-09-05
申请号：JP22543194
申请日：1994-09-20
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD
发明人： KANEZAKI NOBORU , FUJITA KOSAKU , KIKUTA TOMOYUKI , OBA DAISUKE
IPC分类号： F16C33/10 , B22F3/26 , F16C33/14
摘要： PURPOSE:To lengthen the life of a sintered oil retaining bearing by controlling the fluctuation of a sliding range between the sliding face of the bearing and a rotating shaft to control the fluctuation of the coefficient of friction low. CONSTITUTION:A bearing bore 4 through which a rotary shaft 2 is inserted is formed in a bearing body 3 formed of a porous sintered alloy, and a sliding face 6 formed over the whole area in a peripheral direction by squashing hollow pores is partially formed on at least one end part in an axial direction on the inner periphery of the bearing bore 4. Another part in the axial direction of the bearing bore 4 continuing onto the sliding face is composer as a part having large porosity 7 to supply a lubricating oil to the sliding face 6.

6. 发明专利

JPH06129431A SINTERED OIL RETAINING BEARING 失效
公开(公告)号：JPH06129431A
公开(公告)日：1994-05-10
申请号：JP36140392
申请日：1992-12-29
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD , NIPPON DENSO CO
发明人： KANEZAKI NOBORU , MURAYAMA SATOSHI , TANAKA TAKESHI , OBA DAISUKE
IPC分类号： F16C33/10 , F16C33/12
摘要： PURPOSE:To make the adequate supply of lubrication oil possible and form a firm oil firm in retention between both and retain smooth rotation over a long period by forming slide surfaces with an interval and width size of a specific shape. CONSTITUTION:In the case of a sintered oil-containing bearing 10 in which a bearing hole 23 into which a rotary shaft 12 is inserted, is formed at a bearing main body 11 formed of a porous sintered alloy, on the inner periphery surface of the bearing hole 13, slide surfaces 14 are formed by crushing the empty holes of the inner periphery surface at the time of the pressed powder formation of the bearing main body 11. These slide surfaces 14 are formed with the width of a 40 deg.-120 deg. angle around the axis of the bearing hole 13, and at the same time are formed at plural places with the interval of 2X(thetaf-10 deg.) (but thetaf is a load direction at a stationary time). Thus, a proper facing state between a slide surface and the rotary shaft is realized, and empty hole crushing at slide surfaces is carried out at the time of the pressed powder formation of the bearing main body, and by carrying out the plastic deformation of the inner periphery surface, the retainability of lubrication oil is improved.

7. 发明专利

JPH10252757A SINTERED OIL-IMPREGNATED BEARING AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH10252757A
公开(公告)日：1998-09-22
申请号：JP6155497
申请日：1997-03-14
申请人： ASMO CO LTD , MITSUBISHI MATERIALS CORP
发明人： ITO TORU , KANEZAKI NOBORU
IPC分类号： F16C33/10 , F16C33/14
摘要： PROBLEM TO BE SOLVED: To maintain a proper a lubrication effect by ensuring the feed of lubrication oil from a feed surface and to perform the reliable feed of lubrication oil even when the operation state of a rotary shaft is changed. SOLUTION: In a sintered oil-impregnated bearing 1 wherein a bearing hole 4 in which a rotary shaft 2 is inserted is formed in a bearing body 3 formed of a porous sintered alloy, a slide surface 6 formed such that a hole in a partial region in a peripheral direction is squeezed is formed on the inner peripheral surface 5 of the bearing hole 4, a difference 8 in a level in a state that the feed surface 7 side is radially externally spread is formed in a boundary part between the rear end 6a, in the rotation direction of the rotary shaft 2, of the slide surface 6 and a feed surface continued thereto.

8. 发明专利

JPH06123314A OIL-IMPREGNATED SINTERED BEARING 失效
公开(公告)号：JPH06123314A
公开(公告)日：1994-05-06
申请号：JP7989093
申请日：1993-04-06
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD , NIPPON DENSO CO
发明人： KANEZAKI NOBORU , MURAYAMA SATOSHI , TANAKA TAKESHI , OBA DAISUKE
IPC分类号： F16C33/10 , F16C33/14
摘要： PURPOSE:To restrict the reduction of the oil film of sliding surfaces of an oil-impregnated sintered bearing, and facilitate the circumferential positioning of the sliding surfaces and a rotary shaft to be inserted to the bearing. CONSTITUTION:In oil-impregnated sintered bearing 10, a bearing main body 11 made of porous sintered alloy is formed with a bearing hole, in which a rotary shaft 2 is to be inserted. In this oil-impregnated sintered bearing 10, a side of the inner peripheral surface of the hole, where the rotary shaft 12 slides for movement, among the inner peripheral surface of the bearing hole is crushed in the axial direction of the bearing main body 11 at the time of green formation of the bearing main body 11 to form sliding surface S1, S2, and a notch part or a projection part is formed at a position having a predetermined relation with the sliding surfaces S1, S2 of the outer peripheral surface of the bearing main body 11.

9. 发明专利

JPH06123313A OIL-IMPREGNATED SINTERED BEARING 失效
公开(公告)号：JPH06123313A
公开(公告)日：1994-05-06
申请号：JP7989193
申请日：1993-04-06
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD , NIPPON DENSO CO
发明人： KANEZAKI NOBORU , MURAYAMA SATOSHI , TANAKA TAKESHI , OBA DAISUKE
IPC分类号： F16C33/10
摘要： PURPOSE:To reduce the coefficient of friction of an oil-impregnated bearing by crushing symmetrical parts of a hole in the circumferential direction around a point opposite to a side, where a member for transmitting the force to a rotary shaft is arranged, in the axial direction of a bearing main body at the time of green formation. CONSTITUTION:In an oil-impregnated sintered bearing 10, is formed a bearing hole 13, in which a rotary shaft 12 is inserted in a bearing main body 11 made of porous sintered alloy. Among the inner peripheral surface of the bearing hole 13, plural symmetrical parts of the inner peripheral surface of the hole in the circumferential direction around a point Z opposite to a side, where a member for transmitting the force to the rotary shaft 12 is arranged, at 180 degrees in a range of a nearly half-circumference of the side, where the member for transmitting the force to the rotary shaft 12 is arranged, are crushed in the axial direction of the bearing main body 11 at the time of green formation of the bearing main body 11. Leak of the lubricating oil from sliding surfaces S1, S2 is thereby eliminated, and the inner surface between these sliding surfaces S1, S2 is left as a hole and functions as an oil supply part P.

10. 发明专利

JPH04307112A OIL-IMPREGNATED SINTERED BEARING AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04307112A
公开(公告)日：1992-10-29
申请号：JP9954591
申请日：1991-04-04
申请人： MITSUBISHI MATERIALS CORP , ASMO CO LTD
发明人： KANEZAKI NOBORU , TANAKA TAKESHI , HAYASHI YOSHIAKI
IPC分类号： B22F5/00 , B22F5/12 , F16C33/10 , F16C33/12 , F16C33/14
摘要： PURPOSE:To provide an oil-impregnated sintered bearing, whose inner diametral part, excellent in a frictional characteristic, is of hourglass form, and its manufacture. CONSTITUTION:A bearing hole 12 of a bearing body 10 made up of a porous sintered alloy is composed of a sliding surface 13, being formed along the intermediate part in the circumferential direction, and a turning shaft is sliding, and a diametral expanding part 14 being ranged with this sliding surface 13 and expanding the diameter in proportion as heading for the outward, and under this constitution, it is composed of crushing a hole of the sliding surface 13. In addition, this oil retaining bearing is manufactured by way of forming the sliding surface 13 after crushing the hole of the inner circumferential surface when frictional force is made to act on the inner circumferential surface surrounding the central part of a through hole, after the diametral expanding part 14 is formed on the inner circumferential surface of this through hole of a sintered body. Since the hole of the sliding surface 13 is crushed, lubricating oil on the sliding surface is in no case leaked out, whereby a firm oil film with no oil-pressure drop on the sliding surface is formed, so any local contact between the turning shaft 11 and the sliding surface 13 is prevented from occurring, thus a frictional factor in the bearing is made reducible.

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