US3592023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant velocity universal joint
Assignee: NSK Ltd
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Filing: 1969-06-24
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Granted: 1971-07-13
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Expires: 1989-06-24
Abstract
Abstract The present invention provides a constant velocity universal joint of the type in which an outer joint member is disposed coaxially of an inner joint member and the inner concave spherical surface of the outer joint member is formed coaxially with the outer convex spherical surface of the inner joint member, but no retainer is used which avoids the problem of lubrication. According to this invention, the balls for transmitting power are held in the grooves intersecting with each other and provided in said two members, respectively, and the balls lie in the plane bisecting the angle between the axes of the drive and driven shafts. One-half the working angle Beta is selected to be less than the angle Alpha of inclination so that the torque transmission is not abruptly reduced. The cross section of said groove is a simple arcuate curve, the machining of the grooves is much facilitated.
Inventors
- 👤 Hideo Okoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/16; F16D3/20; F16D3/22; F16D3/223; F16D3/224; F16D3/2245; F16D2003/22309; Y; Y10; Y10S; Y10S464/00; Y10S464/904; Y10S464/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
457 words
A constant velocity universal joint comprising; an outer joint member having an inner concave spherical surface and a first shaft drivingly coupled thereto; an inner joint member having an outer convex spherical surface adapted to be fitted into a space defined by said inner spherical surface of said outer joint member and having another shaft drivingly coupled thereto, both iNner and outer joint members having substantially the same spherical radius and the same center; a plurality of power-transmitting balls disposed in a pair of grooves, one groove of said pair of grooves being formed in the spherical surface of said outer joint member in predetermined opposed relation with the other groove which is formed in the spherical surface of said inner joint member, the number of grooves being an even number; the cross-sectional configuration of said grooves being semicircularly shaped and having radius slightly larger than that of a ball; each of the loci traced by the centers of the radii of said pairs of grooves being circles having a radius substantially equal to the radius of the interface between said outer and inner joint members; one of said circular loci of the center of the radius of said one groove lying in a first plane which intersects at the center common in both of said spherical surfaces with the axis of said outer joint member at an angle; the center of said one circular locus being positioned at the intersection of said plane with a plane intersecting at right angles with said plane and containing said axis and in spacedapart relation with said center by a distance; the other circular locus of the center of the radius of the other groove lying in a second plane which intersects with the axis of said inner joint member at the same angle with said angle of said first plane in the direction opposite to that thereof; the center of said other circular locus being positioned at the intersection of the second plane with a plane intersecting at right angles with said second plane and containing said axis and in spaced-apart relation with the center by said distance in the direction opposite to said first center of said one circular locus; said pair of grooves being formed along one of said circular loci in either of said outer or inner joint members, at least three pairs of such grooves being formed in said spherical surfaces of said outer and inner joint members in such a manner that said pairs of grooves are equidistantly spaced apart from one another in a plane containing said common center and intersecting at right angles to said axis, each of said balls being disposed at the intersection of said grooves crossing with each other.
Claim 2
Dependent Claim
457 words
A constant velocity universal joint comprising; an outer joint member having an inner concave spherical surface and a first shaft drivingly coupled thereto; an inner joint member having an outer convex spherical surface adapted to be fitted into a space defined by said inner spherical surface of said outer joint member and having another shaft drivingly coupled thereto, both iNner and outer joint members having substantially the same spherical radius and the same center; a plurality of power-transmitting balls disposed in a pair of grooves, one groove of said pair of grooves being formed in the spherical surface of said outer joint member in predetermined opposed relation with the other groove which is formed in the spherical surface of said inner joint member, the number of grooves being an even number; the cross-sectional configuration of said grooves being semicircularly shaped and having radius slightly larger than that of a ball; each of the loci traced by the centers of the radii of said pairs of grooves being circles having a radius substantially equal to the radius of the interface between said outer and inner joint members; one of said circular loci of the center of the radius of said one groove lying in a first plane which intersects at the center common in both of said spherical surfaces with the axis of said outer joint member at an angle; the center of said one circular locus being positioned at the intersection of said plane with a plane intersecting at right angles with said plane and containing said axis and in spacedapart relation with said center by a distance; the other circular locus of the center of the radius of the other groove lying in a second plane which intersects with the axis of said inner joint member at the same angle with said angle of said first plane in the direction opposite to that thereof; the center of said other circular locus being positioned at the intersection of the second plane with a plane intersecting at right angles with said second plane and containing said axis and in spaced-apart relation with the center by said distance in the direction opposite to said first center of said one circular locus; said pair of grooves being formed along one of said circular loci in either of said outer or inner joint members, at least three pairs of such grooves being formed in said spherical surfaces of said outer and inner joint members in such a manner that said pairs of grooves are equidistantly spaced apart from one another in a plane containing said common center and intersecting at right angles to said axis, each of said balls being disposed at the intersection of said grooves crossing with each other.
References Cited (Backward Citations)
US3475924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |