| 摘要 |
PROBLEM TO BE SOLVED: To provide a scroll thrust shaft bearing structure of a low cost and high precision, of a large load capacity in spite of compactness, and of excellent durability compared to conventional devices. SOLUTION: A scroll thrust shaft bearing device 1 comprises plural scroll thrust shaft bearings 10 disposed with specified disposition relation in a circumferential direction, the scroll thrust shaft bearing 10 is composed of a crank pin 15 comprising a pair of support shafts 20, 21 integrally coupled with each other having a specified eccentric quantity α, and a pair of thrust shaft bearing parts 16, 17 respectively provided on the support shafts 20, 21 of the crank pin 15, and the thrust shaft bearing part 16, 17 is provided with plural needle rollers 25 disposed to roll in such a way that their axial centers coincide with radial directions of the support shafts 20, 21, and a retainer to rotatably position and retain the needle rollers with specified disposition relation. A thrust farce support structure provided with similar or more advantages to those of double cone rollers which conventionally have been difficult to be realized can thus be realized. |
