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US 5,308,293 AGranted
Variable speed drive transmission
AssigneeNone recorded
InventorKyung S. Han
Life of this patent
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AssigneeNone recorded
InventorKyung S. Han
Estimating the term…
A mechanical arrangement of multiple gears forming a transmission device for variable speed output and direction from a constant input source. The arrangement of multiple gears wherein the control of the output is determined by a selective incremental control input relative the constant input source. Combined arrangements of multiple gears utilize variable orbital paths control to determine variable output.
A variable speed gear drive device having a constant input and a variable speed and directional output, comprises a first speed control gear assembly and a directional output gear assembly, said first speed control gear assembly comprising multiple geared pairs, an input drive shaft, and a control gear interengaging one of said geared pairs rotatably positioned on said input shaft, an adjustable camming and drive assembly interconnected by said input shaft by transfer gears, said control gear selectively and intermittently driving said geared pairs on said input shaft, said camming and drive assembly comprising offset circular disks on respective cam disks, offset cams rotatably positioned on said offset circular disk, control disks extending from said input drive shaft, means on said cams for registering with said control disks, a pair of cam engagement arms with one-way clutch drive gear selectively engaged thereon, said directional gear assembly comprising first and second multiple geared pairs on an output shaft, selective control input to said selective gear pairs and means for interconnecting said multiple gear pairs on said one-way clutch drive gears.
A variable speed gear drive device having a constant input and a variable speed and directional output gear assembly comprising a first speed gear control assembly and a directional output gear assembly, said first speed control gear assembly comprising multiple geared pairs, an input drive shaft, a control gear interengaging one of said gear pairs rotatably positioned on said input shaft, an adjustable camming and drive assembly interconnected to said input shaft, said control gear intermittently driving said geared pairs on said input shaft, said camming and drive assembly comprising offset disks on respective cam disks, cams rotatably positioned on said offset disks multiple control disks on input and support shaft means on said cams for registration with said control disks, cam engagement arms selectively engaging said cams, a one-way bearing and output shaft interconnecting with said cam arms, said directional output gear assembly comprising first and second multiple gear pairs on an output shaft, selective control input to said geared pairs and means for interconnecting said geared pairs and said one-way clutch bearing assembly.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts: in which the…
Using gears having orbital motion: with a secondary drive, e.g. regulating motor, in order to vary speed continuously
With gears having orbital motion: comprising bevel gears
Gearing
Term ended 16 Dec 2011 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Technical Field
This device relates to gear transmissions that selectively provide a variable output speed and direction from a constant speed power source.
2. Description of Prior Art
FIG. 1 is a cross-sectional graphic illustrative view of a gear assembly defining the interconnections of variable output to directional gearing assembly;
FIG. 2 is an exploded perspective view of the center input drive shaft and associated variable cam assemblies;
FIG. 3 is a graphic illustration of the variable orbital path determined by interconnected cam elements;
Referring to FIG. 1 of the drawings, a variable speed gear assembly can be seen having a speed selective gear configuration 11 and a directional gear assembly 12 interconnected therewith. The speed selective gear configuration 11 is comprised of an input and support shaft 13 on which is supported multiple pairs of interengaging gear pairs 14 and 15 and a control gear 16. Each of the gear pairs 14 and 15 is defined as having oppositely disposed matching gears 17 and 18 in gear pair 14 and interengaging gears 19 and 20 in gear pair 15. The control gear 16 incrementally advances said gear 17 by selectively incremental rotation within the gear pairs 14 and 15 and associated input support shaft 13. The control gear 16 determines the rotation of the gear 17 that will occur as the result of the pair of interengaging gear pairs 14 and 15 under input on input and support shaft 13 indicated by an input arrow F. In this example, the control gear 16 is of a worm gear configuration. The interengaging gears 19 and 20 of the gear pair 15 are rotatably mounted on a central support shaft 21 which is integral with said input and support shaft 13. It will be evident from the above description that each of the respective gears; 17,18,19, and 20 within each gear pair interengageably mesh with a respective gear of said adjacent gear pair in oppositely disposed relationship to one another. Since the support shaft 21 is driven directly by relative input to the drive and support shaft 13, it will rotate in a one to one relationship therewith. Repositioning the gear 17 will provide rotational output to the gear 18 and its output gear element 22 interengaged thereon. The input and support shaft 13 has three slotted control disks 23,24, and 25 extending therefrom in spaced horizontal relation to one another. The output gear element 22, hereinbefore described, is interconnected to an adjustable camming and variable drive assembly (A.C.D.), best seen in FIGS. 1 and 2 of the drawings. The (A.C.D.) is comprised of a pair of main camming disks 26 and 27 having respective cam parts 28 and 29 thereon in face to face relation. The camming disks 26 and 27 have a central bore therethrough and are rotatably positioned on said main input support shaft 13. The cam parts 28 and 29 are offset circular disks each having a circular cam 30 within an offset opening therein registerable with said respective cam parts 28 and 29. Control pins 31 extend from each of said cams 30 in oppositely disposed relation thereto. The control pins 31 are registerable in the respective slotted control disks 23,24 and 25 having control slots 23A,24A and B, and 25A therein. Respective spiral access slots 32 in cam disks 26 and 27, best seen in FIG. 2 of the drawings are aligned for access of respective control pins 31.
The gear 18 and its output gear element 22 are interconnected to the respective cam disks 26 and 27 by a gear assembly 33 having a support shaft 34 and multiple spaced engagement gears 35, 36, and 37 thereon.
Referring to FIGS. 1 and 4 of the drawings, a pair of bifurcated cam engagement arms 38 can be seen slideably engaging respective cams 30. The cam engagement arms 38 are journaled at 39 with one-way clutch bearings 40 within as will be well known and understood by those skilled in the art. A dual output gear 42 rotatably positioned on an output drive shaft 41 is engaged by the respective one-way clutch bearings 40 as hereinbefore described. Pairs of interengaging gear assemblies 43 and 44 are supported on oppositely disposed respective ends of said output shaft 41. Said interengaging gear assembly 43 has a secondary gear 45 and oppositely disposed beveled matching gears 47 and 48 on a support shaft 49 extending and integral with said output drive shaft 41. The gear 45 acts as a directional control for the output of the output shaft 41. The gear assembly 44 has beveled gears 50 and 51 on a support and control shaft 52 rotatably positioned on the output drive shaft 41.