IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0526946
(2003-09-16)
|
등록번호 |
US-7293919
(2007-11-13)
|
우선권정보 |
JP-2002-267838(2002-09-13); JP-2003-108707(2003-04-14) |
국제출원번호 |
PCT/JP03/011793
(2003-09-16)
|
§371/§102 date |
20050412
(20050412)
|
국제공개번호 |
WO04/025130
(2004-03-25)
|
발명자
/ 주소 |
- Ueno,Hiroshi
- Ohtsuki,Masaaki
- Fukuda,Shinji
- Sakamoto,Kenji
- Eguchi,Syouji
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
8 |
초록
▼
A bearing device mountable on a smaller bearing and allowing to be automatically lubricated for a long period, comprising an inner ring and an outer ring rotated relative to each other, cages and rolling elements held by the cages which are disposed in an annular space between the inner and outer ri
A bearing device mountable on a smaller bearing and allowing to be automatically lubricated for a long period, comprising an inner ring and an outer ring rotated relative to each other, cages and rolling elements held by the cages which are disposed in an annular space between the inner and outer rings, a seal ring disposed on both sides of the inner and outer rings, and a unit body formed of a battery, a tank for storing lubricant, and a pump sucking and discharging the lubricant from the tank which is disposed between the outer ring and the inner ring detachably from the seal ring, wherein the lubricant is discharged from the pump into the annular space in which the rolling elements are disposed and the discharged amount of the lubricant from the pump is controlled by a sensor and a control circuit, and the unit body is formed detachable, whereby a lubrication unit installed in the bearing can be made compact and slim.
대표청구항
▼
The invention claimed is: 1. A bearing device comprising: raceway members which perform relative motion and have opposed faces; a lubricant supply unit body which supplies lubricant is disposed between the opposed faces of said raceway members; and said lubricant supply unit body comprises: a pump
The invention claimed is: 1. A bearing device comprising: raceway members which perform relative motion and have opposed faces; a lubricant supply unit body which supplies lubricant is disposed between the opposed faces of said raceway members; and said lubricant supply unit body comprises: a pump which discharges the lubricant; a nozzle attached to the pump and having a nozzle open end for discharging the lubricant; and the nozzle open end being disposed between said opposed faces of said raceway members. 2. A bearing device according to claim 1, wherein said lubricant supply unit body includes a driving portion for said pump which is an electric generator having a power generating capacity according to a rotational speed of the bearing device, and an amount of lubricant discharged by said pump is controlled in accordance with the power generating capacity of said electric generator. 3. A bearing device according to claim 1, wherein said lubricant supply unit body includes a driving portion for said pump which is a battery. 4. A bearing device according to claim 3, wherein said battery is a fuel cell. 5. A bearing device according to claim 4, wherein said lubricant supply unit body comprises storing means from which hydrogen for said fuel cell can be taken out. 6. A bearing device according to claim 1, wherein said lubricant supply unit body comprises a lubricant storing tank. 7. A bearing device according to claim 1, wherein said raceway members and said lubricant supply unit body have a ring-like shape and are disposed coaxially. 8. A bearing device according to claim 7, wherein said bearing device is a rolling bearing in which said raceway members are an inner ring and an outer ring, and which comprises a plurality of rolling elements between said inner and outer rings. 9. A bearing device according to claim 7, wherein said raceway members include a stationary raceway member and a rotating raceway member, and said lubricant supply unit body is detachably attached to a vicinity of a shoulder portion of a circumferential face of said stationary raceway member which is opposed to said rotating raceway member. 10. A bearing device according to claim 1, wherein said lubricant supply unit body comprises a sensor which detects a lubrication condition between said opposed faces of said raceway members, and said pump is functionally controlled based on a detection output from said sensor. 11. A bearing device according to claim 10, further comprising a controlling means controlling an amount of lubricant discharged by said pump, wherein said sensor is a temperature sensor, said temperature sensor is attached to a vicinity of raceway portions of at least one of said raceway members, and the amount of lubricant discharged by said pump is controlled by said controlling means based on a detection output of said temperature sensor. 12. A bearing device according to claim 10, wherein relationships between an output value of said sensor and a lubrication condition are previously obtained, the lubrication condition is predicted from a measured value of said sensor, and said pump is controlled in accordance with a result of the prediction. 13. A bearing device according to claim 1, wherein said pump is a diaphragm pump comprising a piezoelectric element and a diaphragm which is displaced in a reciprocating manner by said piezoelectric element. 14. A bearing device according to claim 1, wherein said pump comprises a motor. 15. A bearing device according to claim 1, further comprising: a lubricant storing tank; a driving portion driving said pump; a seal ring disposed to seal an opening between said raceway members and having an inner face facing between said raceway members and an outer face on a side opposite said inner face; said lubricant storing tank being detachably attached to said outer face of said seal ring; and said driving portion and said pump being disposed on said inner face of said seal ring. 16. The bearing device according to 1, wherein said pump comprises a control circuit, and said control circuit controls an amount of the lubricant discharged by the pump. 17. The bearing device according to 16, wherein said pump comprises a driving portion, and a control circuit connects between said pump and said driving portion for said pump. 18. A bearing device comprising: raceway members comprising outer and inner rings each having a raceway surface; rolling elements disposed between said outer and inner rings, and a lubricant supply unit body formed as a unit having at least a pump, and said lubricant supply unit body being detachably attached to a vicinity of a shoulder portion of an inner circumferential face of said outer ring or a vicinity of a shoulder portion of an outer circumferential face of said inner ring. 19. The bearing device according to claim 18, wherein said raceway members and said lubricant supply unit body have a ring-like shape and are disposed coaxially. 20. The bearing device according to claim 18, wherein said lubricant supply unit body includes a driving portion for said pump. 21. The bearing device according to claim 18, wherein said pump comprises a nozzle for discharging lubricant. 22. The bearing device according to 21, wherein an open end of said nozzle for discharging lubricant is disposed between opposed faces of said raceway members. 23. A bearing device according to 18, wherein a lubricant storing tank is formed in a unit with said lubricant supply unit body. 24. The bearing device according to 18, further comprising a seal ring disposed between said inner and outer rings. 25. A bearing device, comprising: a bearing comprising: an outer ring having an inner circumferential surface including a raceway surface; an inner ring having an outer circumferential surface including a raceway surface; and rolling elements and a seal ring which are disposed between said outer and inner rings; a lubricant supply unit body formed as a unit including: a lubricant storing tank; and a pump pumping lubricant from the lubricant storing tank; and said lubricant supply unit body being detachably attached to a vicinity of a shoulder portion of the inner circumferential face of said outer ring or a vicinity of a shoulder portion of the outer circumferential face of said inner ring, or to an inner side face of said seal ring. 26. A bearing device comprising: raceway members which perform relative motion and have opposed faces; a lubricant supply unit body which supplies lubricant to a space between said opposed faces and is disposed between the opposed faces of said raceway members; and said lubricant supply unit body comprises: a pump which discharges the lubricant; a nozzle attached to the pump and having a nozzle open end for discharging the lubricant; and a driving portion for driving the pump. 27. The bearing device according to claim 26, wherein the open end of said nozzle for discharging lubricant is disposed between said opposed faces of said raceway members. 28. The bearing device according to claim 27, wherein said lubricant supply unit body comprises a lubricant storing tank. 29. The bearing device according to claim 27, wherein said pump is a diaphragm pump comprising a piezoelectric element and a diaphragm which is displaced in a reciprocating manner by said piezoelectric element. 30. A bearing device comprising: raceway members which perform relative motion and have opposed faces; a lubricant supply unit body which supplies lubricant to a space between said opposed faces and is disposed between the opposed faces of said raceway members; and said lubricant supply unit body comprises: a pump which discharges the lubricant; and a control circuit for controlling an amount of lubricant discharged by said pump. 31. The bearing device according to claim 30, wherein said pump comprises a nozzle for discharging lubricant. 32. The bearing device according to claim 30, wherein said lubricant supply unit body comprises a lubricant storing tank. 33. The bearing device according to claim 30, wherein said pump is a diaphragm pump comprising a piezoelectric element and a diaphragm which is displaced in a reciprocating manner by said piezoelectric element. 34. A bearing device, comprising: a bearing comprising: an outer ring having an inner circumferential surface including a raceway surface; an inner ring having an outer circumferential surface including a raceway surface; and rolling elements disposed between said outer and inner rings; a lubricant supply unit body formed as a unit including a pump which has a nozzle for discharging lubricant; and said lubricant supply unit body being detachably attached to a vicinity of a shoulder portion of the inner circumferential face of said outer ring or a vicinity of a shoulder portion of the outer circumferential face of said inner ring. 35. The bearing device according to claim 34, wherein said pump is a diaphragm pump comprising a piezoelectric element and a diaphragm which is displaced in a reciprocating manner by said piezoelectric element. 36. The bearing device according to 34, a lubricant storing tank is formed in a unit as said lubricant supply unit body. 37. A bearing device, comprising: a bearing comprising: an outer ring having an inner circumferential surface including a raceway surface; an inner ring having an outer circumferential surface including a raceway surface; and rolling elements disposed between said outer and inner rings; a lubricant supply unit body formed as a unit including: a pump discharging lubricant; and a control circuit for controlling an amount of lubricant discharged by said pump; and said lubricant supply unit body being detachably attached to a vicinity of a shoulder portion of the inner circumferential face of said outer ring or a vicinity of a shoulder portion of the outer circumferential face of said inner ring. 38. The bearing device according to claim 37, wherein said pump is a diaphragm pump comprising a piezoelectric element and a diaphragm which is displaced in a reciprocating manner by said piezoelectric element. 39. The bearing device according to 37, a lubricant storing tank is formed in a unit as said lubricant supply unit body. 40. A bearing device, comprising: a bearing comprising: an outer ring having an inner circumferential surface including a raceway surface; an inner ring having an outer circumferential surface including a raceway surface; and rolling elements and a seal ring which are disposed between said outer and inner rings; a lubricant supply unit body formed as a unit including: a lubricant storing tank; and a pump pumping lubricant from the lubricant storing tank; and a driving portion for driving said pump; and said lubricant supply unit body being detachably attached to a vicinity of a shoulder portion of the inner circumferential face of said outer ring or a vicinity of a shoulder portion of the outer circumferential face of said inner ring, or to an inner side face of said seal ring. 41. A bearing device, comprising: raceway members which perform relative motion and have opposed faces; a lubricant supply unit body disposed between the races which supplies lubricant to a space disposed between the opposed faces of said raceway members; and the lubricant supply unit body formed as a unit including: a pump discharging said lubricant from a lubricant storing tank; and a driving portion for driving said pump; and said pump being detachably attached to the bearing device. 42. The bearing device according to claim 41, wherein said pump comprises a nozzle for discharging lubricant.
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