التفاصيل البيبلوغرافية
| العنوان: |
Oblique contact ball bearing and turbocharger |
| Document Number: |
20070154126 |
| تاريخ النشر: |
July 5, 2007 |
| Appl. No: |
10/586959 |
| Application Filed: |
January 27, 2005 |
| مستخلص: |
An oblique contact ball bearing 2 has a curvature radius of a raceway 21 of an outer ring 10 which is reduced toward a bottom 21A of the raceway 21 in a cross-section of the outer ring 10 cut in a plane containing a central axis of the outer ring 10. According to the oblique contact ball bearing 2, a distance Δx1 between the bottom 21A of the raceway 21 of the outer ring 10 and balls 12 can be made greater without increasing a contact angle θ of the ball 12 than the case where the curvature radius of the raceway 21 of the outer ring 10 is constant. Even if a temperature difference occurs between an inner ring and the outer ring, a clearance clogging can be avoided, and the balls are smoothly rotated to prevent early peeling. |
| Inventors: |
Ito, Ikuo (Toyota-shi, JP) |
| Claim: |
1. An oblique contact ball bearing, comprising: an outer ring (7, 10); an inner ring (8, 11); and a ball placed between the outer ring (7, 10) and the inner ring (8, 11), wherein a straight line connecting between a point in contact with a raceway (22, 21) of the outer ring (7, 10) and a point in contact with a raceway of the inner ring (8, 11) is inclined to a plane orthogonal to an axis of the outer ring, and wherein a curvature radius of the raceway (22, 21) is reduced toward a bottom of the raceway (22, 21) in an axial cross-section of the outer ring (7, 10). |
| Claim: |
2. A turbocharger comprising: a housing (4); a turbine shaft (3) having a turbine-side impeller (6) and a compressor-side impeller (5) respectively on both sides of the turbine shaft (3); and an oblique contact ball bearing (1, 2) for supporting the turbine shaft on the housing, wherein the oblique contact ball bearing (1, 2) comprises: an outer ring (7, 10); an inner ring (8, 11); and a ball placed between the outer ring (7, 10) and the inner ring (8, 11), wherein a straight line connecting between a point in contact with a raceway (22, 21) of the outer ring (7, 10) and a point in contact with a raceway of the inner ring (8, 11) is inclined to a plane orthogonal to an axis of the outer ring, and wherein a curvature radius of the raceway (22, 21) is reduced toward a bottom of the raceway (22, 21) in an axial cross-section of the outer ring (7, 10). |
| Claim: |
3. The oblique contact ball bearing as set forth in claim 1, wherein the raceway (22, 21) is a part of an ellipse, whose major axis direction is a radial direction of the outer ring (7, 10), in the axial cross-section of the outer ring (7, 10). |
| Claim: |
4. The turbocharger as set forth in claim 2, wherein the raceway (22, 21) is a part of an ellipse, whose major axis direction is a radial direction of the outer ring (7, 10), in the axial cross-section of the outer ring (7, 10). |
| Current U.S. Class: |
384516/000 |
| Current International Class: |
16 |
| رقم الانضمام: |
edspap.20070154126 |
| قاعدة البيانات: |
USPTO Patent Applications |