US3922926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping drive
Assignee: GAO Gesellschaft fuer Automation und Organisation mbH
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Filing: 1974-04-12
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Granted: 1975-12-02
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Expires: 1994-04-12
Abstract
Abstract A stepping drive comprises an input shaft, an output shaft, and a planetary gearing and a crank mechanism mounted therebetween. The planetary gearing is mounted concentrically of the input shaft and includes a fixed central gear and at least one planet gear carried by a secondary shaft which is supported by and rotatably mounted in a planet carrier. The planet gear performs a revolving motion synchronous with a uniform, basic rotary motion of the input shaft and, simultaneously, a rotary motion about its own axis. The crank mechanism is a four-bar linkage including a planet crank arm fixed to the secondary shaft carrying the planet gear, an output crank arm fixed to the output shaft, and a connecting rod therebetween. The revolving motion of the planet gear around the central gear is transmitted by the crank mechanism to the output shaft as the basic rotary motion synchronous with that of the input shaft. The rotary motion of the planet gear about its own axis is transformed by the crank mechanism into a swinging, reciprocating motion of the output crank arm which motion is superimposed on the basic rotary motion of the output shaft so that the resulting motion of the latter is a sine-like accelerating and decelerating rotation. The frequency and amplitude of this stepping motion may be adjusted by the gear ratio of the planetary gearing and the length of the linkage members in the crank mechanism.
Inventors
- 👤 Herbert Bernardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:28
CPC Classifications
F; F16; F16H; F16H35/00; F16H35/02; F16H27/00; F16H27/04; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/18; Y10T74/18056; Y10T74/18184; Y10T74/182; Y10T74/18272; Y10T74/1836
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A stepping drive for high step frequencies which, at constant input angular velocity, generates a sinelike response of the output angular velocity, i.e., permits, for example, one or more stops of the output shaft per revolution of the input shaft, characterized in that a crank motion is superimposed on a uniform rotary motion, so that the desired sine-like output angular velocity is obtained.
Claim 2
Dependent Claim
63 words
A stepping drive for high step frequencies which, at constant input angular velocity, generates a sinelike response of the output angular velocity, i.e., permits, for example, one or more stops of the output shaft per revolution of the input shaft, characterized in that a crank motion is superimposed on a uniform rotary motion, so that the desired sine-like output angular velocity is obtained.
Claim 3
Dependent Claim
249 words
A stepping drive for high step frequencies, comprising an input shaft adapted to be driven at a constant angular velocity thereby performing a basic rotary motion, an output shaft, a planetary gearing associated with said input shaft and including a fixed sun gear mounted concentrically of said input shaft, a planet carrier permanently mounted on said input shaft for rotation therewith, a secondary shaft parallel to and spaced from said input shaft extending through and supported by said planet carrier for free rotation, and a planet gear meshing with said sun gear meshing with said sun gear and rigidly mounted on said secondary shaft for rolling on said sun gear, a crank mechanism embodying a four-bar linkage connected to said output shaft and, through said secondary shaft and said planet carrier, to said input shaft and including a planet crank joined to said secondary shaft for rotation therewith and having a free end, an output crank joined to said output shaft for rotation therewith and having a free end, and a connecting rod pivoted to and connecting said free ends of said planet and output cranks, whereby said output shaft, in operation, receiving said basic rotary motion from said input shaft through said planet carrier, said secondary shaft and said crank mechanisM, and a superimposed alternate rotary motion, accelerating and decelerating in accordance with a sine-like function, from the oscillatory motion of said output crank caused by said rotary motion of said secondary shaft transmitted through said crank mechanism.
Claim 4
Dependent Claim
249 words
A stepping drive for high step frequencies, comprising an input shaft adapted to be driven at a constant angular velocity thereby performing a basic rotary motion, an output shaft, a planetary gearing associated with said input shaft and including a fixed sun gear mounted concentrically of said input shaft, a planet carrier permanently mounted on said input shaft for rotation therewith, a secondary shaft parallel to and spaced from said input shaft extending through and supported by said planet carrier for free rotation, and a planet gear meshing with said sun gear meshing with said sun gear and rigidly mounted on said secondary shaft for rolling on said sun gear, a crank mechanism embodying a four-bar linkage connected to said output shaft and, through said secondary shaft and said planet carrier, to said input shaft and including a planet crank joined to said secondary shaft for rotation therewith and having a free end, an output crank joined to said output shaft for rotation therewith and having a free end, and a connecting rod pivoted to and connecting said free ends of said planet and output cranks, whereby said output shaft, in operation, receiving said basic rotary motion from said input shaft through said planet carrier, said secondary shaft and said crank mechanisM, and a superimposed alternate rotary motion, accelerating and decelerating in accordance with a sine-like function, from the oscillatory motion of said output crank caused by said rotary motion of said secondary shaft transmitted through said crank mechanism.
Claim 5
Dependent Claim
41 words
A stepping drive for high step frequencies, according to claim 2, wherein two planet gears symmetrically arranged relative to said gun gear and two corresponding crank mechanisms conjointly acting on said output shaft in the same direction of rotation are provided.
Claim 6
Dependent Claim
25 words
A stepping drive for high step frequencies, according to claim 2, wherein said input shaft and said output shaft are axially aligned with each other.
Claim 7
Dependent Claim
41 words
A stepping drive for high step frequencies, according to claim 2, wherein said planet crank, said output crank and said connecting rod are disconnectably connected to each other so as to permit replacement for changing the amplitude of the output motion.
Claim 8
Dependent Claim
41 words
A stepping drive for high step frequencies, according to claim 2, wherein said planet gear and said sun gear as well as said planet carrier are detachably mounted so as to permit replacement for changing the frequency of the output motion.
Claim 9
Independent Claim
181 words
A method of effecting a stepping drive for high step frequencies, comprising driving an input member at a constant angular velocity corresponding to a uniform, basic rotary motion, transforming said basic rotary motion into a synchronous revolving motion of a planet member of a planetary gearing simultaneously performing a rotary motion about its own axis, retransforming said revolving motion of said planet member into a synchronous rotary motion of an output member by means of a crank mechanism including a planet crank arm fixed to and rotating with said planet member, a connecting rod, and and output crank arm fixed to and rotating with said output member, thereby imparting to said output member said basic rotary motion, imparting to said output crank arm a swinging motion following a sine-like function by transforming said rotary motion of said planet crank arm through said connecting rod into an oscillatory motion of said output crank arm, thereby superimposing said oscillatory motion on said basic rotary motion of said output member and obtaining a sine-like periodical change of the angular velocity of said output member.
Claim 10
Independent Claim
181 words
A method of effecting a stepping drive for high step frequencies, comprising driving an input member at a constant angular velocity corresponding to a uniform, basic rotary motion, transforming said basic rotary motion into a synchronous revolving motion of a planet member of a planetary gearing simultaneously performing a rotary motion about its own axis, retransforming said revolving motion of said planet member into a synchronous rotary motion of an output member by means of a crank mechanism including a planet crank arm fixed to and rotating with said planet member, a connecting rod, and and output crank arm fixed to and rotating with said output member, thereby imparting to said output member said basic rotary motion, imparting to said output crank arm a swinging motion following a sine-like function by transforming said rotary motion of said planet crank arm through said connecting rod into an oscillatory motion of said output crank arm, thereby superimposing said oscillatory motion on said basic rotary motion of said output member and obtaining a sine-like periodical change of the angular velocity of said output member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |