Double involute pinion-face gear drive system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-055/16
F16H-055/08
F16H-001/14
출원번호
US-0211852
(2011-08-17)
등록번호
US-8967012
(2015-03-03)
발명자
/ 주소
Napau, Ioan
Napau, Mircea
출원인 / 주소
GM Global Technology Operations, LLC
인용정보
피인용 횟수 :
3인용 특허 :
6
초록▼
A double involute pinion-face gear drive provides transmission of torque and speed, or direction of movement modification between non-intersecting shafts at right angles to one another. A double involute cylindrical pinion on one axis, engages a rotatable disk-shaped gear on the second axis. The tee
A double involute pinion-face gear drive provides transmission of torque and speed, or direction of movement modification between non-intersecting shafts at right angles to one another. A double involute cylindrical pinion on one axis, engages a rotatable disk-shaped gear on the second axis. The teeth of the pinion are curved in an abridged, normal or extended involute shape. Likewise, the teeth of the face gear are curved in abridged, normal or extended involute shape in the lengthwise direction of the teeth. These gear drives can be simultaneously bi-rotational and bi-directional and allow a relatively wide range of speed ratios, as low as 1:1 and as high as 7.5:1.
대표청구항▼
1. A double involute pinion-face gear drive comprising, in combination, a double involute pinion disposed on a first axis and having a cylindrical periphery, said double involute pinion having a plurality of normal involute teeth disposed radially on said cylindrical periphery and shaped along an in
1. A double involute pinion-face gear drive comprising, in combination, a double involute pinion disposed on a first axis and having a cylindrical periphery, said double involute pinion having a plurality of normal involute teeth disposed radially on said cylindrical periphery and shaped along an involute curve in a lengthwise direction of said normal involute teeth, of one of left-hand and right-hand helix angle anda face gear disposed on a second axis and having a pair of side faces, said face gear disposed orthogonal to and spaced from said first axis at a predetermined center distance, said face gear in mesh with said double involute pinion and having a plurality of teeth disposed on one of said side faces and shaped along an involute curve in a lengthwise direction of said teeth, of one of left-hand and right-hand helix angle;said double involute pinion having its pitch plane perpendicular to said first axis, containing a double involute pinion pitch circle and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth surfaces;said face gear having its pitch plane perpendicular to said second axis, containing the face gear base circle from which said plurality of teeth of said face gear are generated and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth surfaces;said double involute pinion pitch plane being in a predetermined arrangement relative to said face gear base circle,wherein said double involute pinion is integrally formed with a shank and said shank is aligned with said first axis. 2. The double involute pinion-face gear drive of claim 1 wherein said double involute pinion teeth and said face gear teeth are longitudinally shaped in a form of a shortened involute curve of said face gear base circle, while said double involute pinion pitch plane is arranged tangential to a circle outwardly concentric to said face gear base circle at a prescribed grade of involute modification. 3. The double involute pinion-face gear drive of claim 1 wherein said double involute pinion teeth and said face gear teeth are longitudinally shaped in a form of a normal involute curve of said face gear base circle, while said double involute pinion pitch plane is arranged tangential to said face gear base circle. 4. The double involute pinion-face gear drive of claim 1 wherein said double involute pinion teeth and said face gear teeth are longitudinally shaped in a form of an extended involute curve of said face gear base circle, while said double involute pinion pitch plane is arranged tangential to a inwardly concentric to said face gear base circle at a prescribed grade of involute modification. 5. The double involute pinion-face gear drive of claim 1 wherein said plurality of teeth on said double involute pinion equals said plurality of teeth on said face gear. 6. The double involute pinion-face gear drive of claim 1 wherein said plurality of teeth on said double involute pinion have both convex flanks as normal involute profiles of equal pressure angles within said double involute pinion pitch plane, while said plurality of teeth on said face gear have both convex and concave flanks as straight-lined rack shape profiles of also equal pressure angle within said double involute pinion pitch plane. 7. The double involute pinion-face gear drive of claim 1 wherein said plurality of teeth on said double involute pinion have both convex flanks as normal involute profiles of different pressure angles within said double involute pinion pitch plane, while said plurality of teeth on said face gear have both convex and concave flanks as straight-lined rack shape profiles of also different pressure angle within said double involute pinion pitch plane. 8. The double involute pinion-face gear drive of claim 1 wherein said double involute pinion drives said face gear. 9. The double involute pinion-face gear drive of claim 1 wherein said face gear drives said double involute pinion. 10. The double involute pinion-face gear drive of claim 1 wherein said double involute pinion is interchangeable in order to obtain different gear speed ratios for the same offset arrangement at a prescribed center distance of multiple said double involute pinions having the same modulus but different number of teeth. 11. The double involute pinion-face gear drive of claim 1 wherein said plurality of teeth on said face gear have a medium helix angle within the range from 30° to 45°. 12. The double involute pinion-face gear drive of claim 1 capable of providing a wide range of relative low speed gear ratios, including gear speed ratios as low as 1:1 and as high as 7.5:1. 13. The double involute pinion-face gear drive of claim 1 wherein said face gear defines an aperture aligned with said second axis and is received upon and secured to a second shaft. 14. The double involute pinion-face gear drive of claim 1 wherein said face gear defines an aperture aligned with said second axis and is received upon and secured directly to a second shaft or a rotatable flange. 15. The double involute pinion-face gear drive of claim 1 wherein said plurality of said double involute pinion teeth and plurality of said face gear teeth are made from one of metal by a cutting process, plastic by an injection molding process and powdered metal by a metal sintering process. 16. A double involute pinion-face gear drive system comprising, in combination, a double involute pinion disposed on a first axis, said double involute pinion having a plurality of normal involute teeth, of the same or different pressure angle flanks, disposed radially on its cylindrical periphery and shaped in a lengthwise direction of said teeth along an involute curve, of one of left-hand and right-hand helix angle, and a face gear disposed on a second axis orthogonal to and spaced from said first axis at a predetermined center distance, said face gear in mesh with said double involute pinion and having a plurality of teeth, of the same or different pressure angle flanks, disposed on one of its side faces and shaped in lengthwise direction of said teeth along an involute curve, said plurality of teeth on said face gear having a medium helix angle within the range of from 30° to 45°;said double involute pinion having its pitch plane perpendicular to its axis, containing said double involute pinion pitch circle and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth surfaces;said face gear having its pitch plane perpendicular to its axis, containing the face gear base circle from which the involute teeth of said face gear are generated and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth surfaces;said double involute pinion pitch plane being in a predetermined arrangement relative to said face gear base circle,wherein said double involute pinion is integrally formed with a shank and said shank is aligned with said first axis. 17. The double involute pinion-face gear drive system of claim 16 wherein said double involute pinion and face gear teeth are longitudinally shaped in a form of a normal, shortened, or extended involute curve within said face gear pitch plane, while said double involute pinion pitch plane is arranged tangential to a circle, outwardly concentric to said face gear base circle or inwardly concentric to said face gear base circle at a prescribed grade of involute modification, correspondingly. 18. The double involute pinion-face gear drive system of claim 17 wherein said plurality of teeth on said double involute pinion, equals or not, said plurality of teeth on said face gear, thus providing a wide range of relative low speed gear ratios, including gear speed ratios as low as 1:1 and as high as 7.5:1; said double involute pinion or said face gear being the drive member;said double involute pinions having the same modulus but different number of teeth are interchangeable for the same offset arrangement at a prescribed center distance;said plurality of said double involute pinion teeth and a plurality of said face gear teeth are made from: metal by a cutting process, plastic material by an injection molding process or powder metal by a sintering process. 19. A double involute pinion-face gear drive system comprising, in combination, an involute pinion disposed on a first axis and having a cylindrical periphery, said double involute pinion having a plurality of involute teeth shaped along an extended or shortened involute curve in a lengthwise direction of said involute teeth of one of left-hand and right-hand helix angle andan involute face gear disposed on a second axis and having a pair of side faces, said face gear disposed orthogonal to and spaced from said first axis at a predetermined center distance, said involute face gear in mesh with said involute pinion gear and having a plurality of involute teeth disposed on one of said side faces and shaped along an extended or shortened involute curve in a lengthwise direction of said involute teeth of one of left-hand and right-hand helix angle;said double involute pinion having its pitch plane perpendicular to said first axis, containing a double involute pinion pitch circle and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth;said face gear having its pitch plane perpendicular to said second axis, containing the face gear base circle from which said plurality of teeth of said face gear are generated and the pitch point as the common point of instantaneous contact between the pinion and face gear teeth;said double involute pinion pitch plane being in a predetermined arrangement relative to said face gear base circle. 20. The double involute pinion-face gear drive system of claim 19 wherein said plurality of involute teeth disposed on one of said side faces of said face gear have a medium helix angle within the range of from 30° to 45°.
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이 특허에 인용된 특허 (6)
Carter Willis M. (Lexington KY), Bevolute gear system.
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