Mass balancing mechanism and assembly method
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0900801
(2010-10-08)
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등록번호 |
US-8555848
(2013-10-15)
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발명자
/ 주소 |
- Solfrank, Peter
- Mederer, Tobias
- Tasche, Alexander
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출원인 / 주소 |
- Schaeffler Technologies AG & Co. KG
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
A mass balancing mechanism and method of assembly of the same is provided. The mass balancing mechanism compensates mass forces and/or mass moments of inertia of an internal combustion engine and includes two compensation shafts and a traction drive which connects a driven pinion of the crankshaft t
A mass balancing mechanism and method of assembly of the same is provided. The mass balancing mechanism compensates mass forces and/or mass moments of inertia of an internal combustion engine and includes two compensation shafts and a traction drive which connects a driven pinion of the crankshaft to drive pinions of the compensation shafts through a traction mechanism. Rotation of the compensation shafts is achieved through a spur gearing with two meshing spur gears arranged between one of the drive pinions and the associated compensation shaft, one of the spur gears being connected to the one drive pinion and the other of the spur gears being connected to the associated compensation shaft. For adjusting the tooth flank lash between the spur gears, an eccentric bearing having a rotationally fixable eccentric raceway is provided by the invention.
대표청구항
▼
1. A mass balancing mechanism for compensating mass forces and/or mass moments of inertia of an internal combustion engine, said mass balancing mechanism comprising two compensation shafts rotatable in opposite directions and further comprising a traction drive which connects a driven pinion of a cr
1. A mass balancing mechanism for compensating mass forces and/or mass moments of inertia of an internal combustion engine, said mass balancing mechanism comprising two compensation shafts rotatable in opposite directions and further comprising a traction drive which connects a driven pinion of a crankshaft of the internal combustion engine to drive pinions of the compensation shafts through a chain or a toothed belt, and for producing a rotation of the compensation shafts in opposite directions, a spur gearing with first and second meshing spur gears is arranged between one of the drive pinions and the associated compensation shaft, the first spur gear being connected rotationally fast to the one drive pinion and the second spur gear being connected rotationally fast to the associated compensation shaft, and a rotatable eccentric bearing having a rotationally fixable eccentric raceway having a central axis about which the one drive pinion and the first spur gear rotate, the eccentric raceway is rotationally positionable to allow adjustment of a tooth flank lash between the spur gears. 2. The mass balancing mechanism according to claim 1, wherein the eccentric bearing is a rolling bearing comprising an inner ring which forms the eccentric raceway, an outer ring, and rolling elements arranged between said inner and outer rings. 3. The mass balancing mechanism according to claim 2, wherein each of the compensation shafts comprises a drive-side end section on which a rolling bearing that supports the compensation shaft in a radial direction and in axial direction in the internal combustion engine is received, and a bearing carrier that can be fixed on the internal combustion engine is provided on one side of the spur gearing and receives the eccentric bearing and the shaft-side rolling bearing. 4. The mass balancing mechanism according to claim 3, wherein the bearing carrier is a cold shaped sheet metal blank. 5. The mass balancing mechanism according to claim 3, wherein on the eccentric bearing-side, the bearing carrier comprises an annular mandrel which is enclosed by the inner ring of the eccentric bearing, and on a side of the shaft-side rolling bearing, the bearing carrier comprises a hollow cylinder that encloses an outer ring of the shaft-side rolling bearing. 6. The mass balancing mechanism according to claim 5, wherein the inner ring of the eccentric bearing is rotatably fixed by a press fit created between the annual mandrel and the inner ring through a widening of the annular mandrel. 7. The mass balancing mechanism according to claim 5, wherein the annular mandrel serves to receive a screw connection through which the bearing carrier is fixed on the internal combustion engine, and the screw connection is further also configured to rotatably fix the inner ring of the eccentric bearing. 8. The mass balancing mechanism according to claim 7, wherein the screw connection comprises a collar screw that can be screwed into a threaded bore of the internal combustion engine, and the inner ring of the eccentric bearing is clamped axially between the screw collar and the bearing carrier. 9. The mass balancing mechanism according to claim 6, wherein the compensation shafts are configured as tunnel shafts that are insertable in a direction of their axes of rotation into a mounting channel of the internal combustion engine, the one drive pinion, the eccentric bearing, the spur gearing, the bearing carrier, the associated compensation shaft and the shaft-side rolling bearing form a structural unit that can be mounted on the internal combustion engine with the inner ring of the eccentric bearing rotatably fixed on the annular mandrel. 10. A method of assembly of a structural unit of a mass balancing mechanism of claim 9, comprising: adjusting a tooth flank lash between the spur gears by rotating the inner ring of the eccentric bearing into such a position that the tooth flank lash is situated within a desired range,retaining the inner ring of the eccentric bearing in the position with the tooth flank lash in the desired range, andplastic widening of the annular mandrel for creating a press fit that rotatably fixes the inner ring of the eccentric bearing on the annular mandrel. 11. The method of claim 10, wherein the annular mandrel receives a screw connection through which the bearing carrier is fixed on the internal combustion engine, with the method further comprising: inserting the structural unit into the internal combustion engine, andtightening the screw connection, so that the inner ring of the eccentric bearing is rotatably fixed by axial bracing against the bearing carrier.
이 특허에 인용된 특허 (10)
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Ohsawa,Hiroshi, Balancing device for an engine.
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Iwata Kazuyuki,JPX ; Niizato Tomonori,JPX, Balancing device for reciprocating engine.
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Mitchell Stephen W. (Greater Manchester GBX), Balancing system.
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Brawley Thomas Scott (3013 Mayfield Drive Johnson City TN 37601), Bearing component.
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Siemensmeyer Heinrich (Dortmund DEX), Empty-center rotating-roller joint.
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Downs Robert Charles ; Siismets Arvo J., Engine balancer.
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Hamilton,Jeffrey R., Integrated drive sprocket and gear for balance shaft.
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Zeilinger, Karl; Bachschmid, Reiner, Internal combustion engine with mass balance.
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Tisch, Siegfried; Solfrank, Peter, Radial bearing.
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Iso,Kenichi; Miyajima,Hirotoshi; Denpou,Katsuaki; Toda,Yujiro; Yamazaki,Masahiko; Naka,Michiharu; Fujita,Yasunobu, Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system.
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