US3818747A - Driving mechanisms having multiple maltese driving gear - Google Patents

Driving mechanisms having multiple maltese driving gear Download PDF

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Publication number
US3818747A
US3818747A US00312260A US31226072A US3818747A US 3818747 A US3818747 A US 3818747A US 00312260 A US00312260 A US 00312260A US 31226072 A US31226072 A US 31226072A US 3818747 A US3818747 A US 3818747A
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United States
Prior art keywords
driving
shaft
toothed
pin
pair
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00312260A
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English (en)
Inventor
Riemsdijk G Van
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smit Nijmegen Electrotechnische Fabrieken NV
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Smit Nijmegen Electrotechnische Fabrieken NV
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
    • F16H27/04—Step-by-step mechanisms without freewheel members, e.g. Geneva drives for converting continuous rotation into a step-by-step rotary movement
    • F16H27/06—Mechanisms with driving pins in driven slots, e.g. Geneva drives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/44—Driving mechanisms, i.e. for transmitting driving force to the contacts using Geneva movement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/1987—Rotary bodies
    • Y10T74/19879—Geneva

Definitions

  • ABSTRACT A multiple maltese driving mechanism for the conversion of the continuous rotation of a driving shaft into the stepwise movement of a body, said mechanism comprising a plurality of toothed-members fixed to said body and a plurality of driving pins fixed to said driving shaft, said pins being adapted to cooperate in pairs with pairs of said members for special steps of said body and during such steps to drive said body by turns and to keep together said body positively coupled with said driving shaft.
  • SHEET 2 BF 2 1.
  • DRIVING MECHANISMS HAVING MULTIPLE MALTESE DRIVING GEAR The invention relates to a driving mechanism provided with a multiple maltese driving gear for the stepwise movement of a body, e.g.
  • the body to be driven comprises at least one pair of rigidly interconnected toothed members which are positioned side by side or one above the other in the direc tion of the driving shaft and extend transversely to said shaft, said toothed members overlapping each other at least partly in the direction of movement;
  • the driving shaft is provided with at least one pair of driving pins, of which each one is adapted to cooperate with an individual one of said toothed members only, said driving pins being disposed at different radial distances from said driving shaft and extending parallel to said shaft in one and the same plane containing said shaft;
  • each one of the overlapping portions of said toothed members has at least one tooth space and in which the tooth spaces of said overlapping portions form at least one pair of associated tooth spaces, of which the central lines lie in one and the same plane extending transversely to the direction of movement of the body.
  • a maltese driving mechanism of this kind for the stepwise rotation of a shaft, particularly the shaft of an on-load tap-changer for a regulating transformer, is disclosed in the Swiss Patent specification 434,450.
  • This known maltese driving mechanism is used for the stepwise rotation of a tap selector over two different angles, said tap selector being adapted to operate under noload contitions only. Therein the rotation over the larger angle is necessary in the region, where the voltage difference between two adjacent fixed contacts of the tap selector is a multiple of the voltage difference between the other adjacent fixed contacts.
  • the speed of switching during the rotation over the larger angle is greater than that during the rotation over the smaller angle.
  • the invention has the object to provide a driving mechanism with a multiple maltese driving gear, in which the mentioned disadvantage is avoided and by means of which a body can not only rectilinearly moved with different steps or rotated over different angles but also the curve of the speed of said body .can be chosen at wil within a predetermined zone during its movement. Consequently, a driving mechanism according to the invention has more degrees of freedom than the known driving mechanism, whereby it is possible to make, for instance, the maximum speed during the greater step equal to that during a smaller step.
  • the tooth spaces formed in the overlapping portions of such a pair of toothed members and forming a pair of tooth spaces belonging to each other have such shapes that the driving pins engaging said tooth spaces during the stepwise movement of the body drive said body at least by. turns and the body is, during said movement, positively coupled with the driving shaft by turns by one driving pin, and by the two driving pins together.
  • both driving pins act, during one movement of the body, on the toothed members of said body. If one driving pin is used for the greater step and the other one for the smaller step of the body, the speed of the body can during the movement thereof by both driving pins, be varied in the region lying between the region of speed depending on the action of one driving pin and the region of speed depending on the action of the other driving pin. The curve of the speed then depends on the shape ofeach one of the tooth shapes cooperating to effect the movement in question.
  • said positive coupling is obtained, in that through a portion of the stroke one driving pin engages in the known way a fitting slot left between the teeth of one toothed member and through a next portion of the stroke one of both driving pins is used for driving and the other driving pin locks the position of the body relatively to that of the driving shaft.
  • the driving pins may alternately have a driving and a locking function. How they cooperate depends on the shapes of the tooth spaces of the toothed members of said body.
  • the invention is not restricted to the use of one pair of toothed members and one pair of driving pins cooperating therewith. If, for instance, the driving shaft is provided with three driving pins lying at different radial distances from said shaft and the body is provided with three toothed members belonging thereto, three different pairs of driving pins and pairs of toothed members can be formed for moving the body with different steps and speeds, so that, when the driving pins can also be active by themselves only as in the known mechanisms, the body can be moved with steps of three different lengths and with six different curves of the speed.
  • the driving mechanism constructed according to the invention and used for driving an on-load tap-changer for a regulating transformer may advantageously be so carried out, that of the tooth spaces formed in the overlapping portions of such a pair of toothed members and forming a pair of tooth spaces belonging to each other the tooth space of the toothed member cooperating with the driving pin which is closest to the driving shaft has a substantially triangular shape and the other tooth space has the shape of a bottle.
  • FIG. 1 partly a cross sectional view and partly a plan view of a maltese driving gear constructed in accordance with the invention
  • FIG. 2 partly an axial sectional view on the line [1-H and partly an elavational view of the driving mechanism shown in FIG. 1,
  • FIGS. 3 and 4 different positions during a step of the driving mechanism shown in FIG. 1,
  • FIG. a diagrammatical view of an on-load tapchanger, in which the driving mechanism illustrated in FIGS. l4 may be used,
  • FIG. 6 partly a cross sectional view and partly a plan view of a variant of the maltese driving mechanism shown in FIGS. 1-4,
  • FIG. 7 partly an axial sectional view and partly an elevational view of the driving mechanism shown in FIG.
  • FIG. 8 partly a cross sectional view and partly a plan view of a second variant of the driving mechanism shown in FIGS. l4 and FIG. 9 a detail of a third variant of the driving mechanism shown in FIGS. l4.
  • a continuously rotating driving shaft is designated by l and a stepwise rotating driven shaft is indicated by 2.
  • a toothed member in the shape of a disc 3 mounted on the driven shaft 2 are a toothed member in the shape of a disc 3 and, axially spaced therefrom, a toothed member in the shape of a sector 4.
  • the toothed disc 3 has eight tooth spaces, of which six consecutive tooth spaces 5 lie at equal smaller angular distances from each other and the two remaining tooth spaces 6 lie at greater angular distances from each other and from the tooth spaces 5.
  • the toothed sector 4 has two tooth spaces 7, the centre line of each of which extends in the same plane containing the driven shaft 2 as the centre line of a tooth space 6 of the toothed disc 3.
  • a driving pin 8 cooperates with the toothed disc 3 and a driving pin 9 cooperates with the toothed sector 4.
  • the driving pins 8 and 9 extend parallel to the driving shaft 1 in one and the same plane containing said shaft 1.
  • the driving pin 8 lies closer to the driving shaft 1 than the pin 9.
  • the shape of the tooth space 6 of the disc 3 is substantially triangular and the tooth space 7 has the shape of a bottle.
  • the stepwise rotation of the shaft 2 is determined only by the cooperation of the pin 8 and one of the tooth spaces 5 of the disc 3.
  • the shaft 2 is then rotated over the smaller angles.
  • the toothed sector 4 has been brought into reach of the pins 9 and 8, as is shown in FIG. 4, the pin 9 engages the neck of the bottle-shaped tooth space 7 of the toothed sector 4.
  • the driving pin 8 penetrates at the same time into the V-shaped tooth space 6 of the disc 3, but it remains yet clear from the left-hand tooth flank bounding the space 6.
  • the shaft 2 is then first driven by the pin 9 over a small angle.
  • the shaft 2 is positively coupled with the shaft 1, since, notwithstanding the V-shaped tooth space 6 and the bottle-shaped tooth space 7 are each too wide to lock the driving pin 8 and 9, respectively, the two pins are active together and prevent that the shaft 2 with the toothed members 3 and 4 can have more than one angular position relatively to each active angular position of the driving pins 8 and 9.
  • the two driving pins 8, 9 act by turns as driving pin and the pin 9 sees to the positive coupling between the shafts l and 2, as long as it is in the bottle neck during the first and the last part of the active stroke, whereas in the intermediate part of said stroke the pins 8 and 9 see together to said positive coupling.
  • What will happen in the second half of the active stroke can be understood from FIGS. 3 and 4, if the direction of rotation indicated by the arrow is reversed.
  • the driving mechanism shown in FIGS. 1-4 is adapted for a selector switch illustrated in FIG. 5.
  • This selector switch comprises eight fixed contacts which are arranged at equal free distances from each other. Of these fixed contacts the contacts 10, ll, 12, 13, 14 extend through equal smaller lengths of arc and the contacts 15 and 17 extend each through a somewhat greater length of arc, whereas the contact 16 has a length of are which is still a bit greater.
  • the contact 16 has a length of are which is still a bit greater.
  • the driving shaft is provided with three driving'pins 21, 22 23 lying at different radial distances from said shaft in a common plane containing the driving shaft 1 and the driven shaft 2 comprises three toothed members 24, 25, 26 cooperating with said driving pins.
  • the pin 23 starts to drive the shaft 2 through the toothed sector 26. Thereafter the pin 22 and the toothed disc take over this driving action.
  • the stroke is defined by the pin 23 and the maximum angular speed is defined by the pin 22 only.
  • FIG. 9 shows a detail, in which the shapes of the cooperating tooth spaces differ from those of the driving mechanisms illustrated in the preceding figures.
  • the flanks of the triangular tooth spaces 32 are bent inwards and the shape of the bottle-shaped tooth space 33 is more cambering.
  • another shape of the flanks of a tooth space will correspond, during the step wise rotation or the stepwise rectilinear movement, with another curve of the speed.
  • the two flanks of a tooth space need not be the mirror images of one another.
  • a driving mechanism provided with a multiple maltese driving gear for the stepwise movement of a body, e.g. the stepwise rotation of a shaft, by means of a rotating driving shaft, said driving mechanism comprising at least one pair of toothed members which are rigidly connected to said body and extend in different planes at right angles with said driving shaft, said toothed members overlapping each other at least partly in the direction of movement of the body and at least one pair of driving pins rigidly connected to the driving shaft and extending parallel to and at different radial distances from the driving shaft in one and the same plane containing said shaft, each one of said driving pins being adapted to cooperate with an individual one of said toothed members only, each one of the overlapping portions of said pair of toothed members having at least one tooth space, of which the centre line lies in the same plane extending transversely to the direction of movement of the body as the centre line of an associated tooth space of the other toothed member of said pair and the two associated tooth spaces of the overlapping portions of said pair of toothed

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
US00312260A 1971-12-15 1972-12-05 Driving mechanisms having multiple maltese driving gear Expired - Lifetime US3818747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL717117177A NL145333B (nl) 1971-12-15 1971-12-15 Draaibare kiezer met een meervoudig maltezerkruis-drijfwerk.

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US3818747A true US3818747A (en) 1974-06-25

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US00312260A Expired - Lifetime US3818747A (en) 1971-12-15 1972-12-05 Driving mechanisms having multiple maltese driving gear

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US (1) US3818747A (cg-RX-API-DMAC7.html)
AT (1) AT321415B (cg-RX-API-DMAC7.html)
CA (1) CA963692A (cg-RX-API-DMAC7.html)
DE (1) DE2260050C3 (cg-RX-API-DMAC7.html)
FR (1) FR2170484A5 (cg-RX-API-DMAC7.html)
GB (1) GB1399554A (cg-RX-API-DMAC7.html)
IT (1) IT969287B (cg-RX-API-DMAC7.html)
NL (1) NL145333B (cg-RX-API-DMAC7.html)
SE (1) SE380667B (cg-RX-API-DMAC7.html)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048868A (en) * 1976-06-18 1977-09-20 Lock William E Interrupted intermittent motion device
US4562316A (en) * 1984-06-07 1985-12-31 Asea Electric, Inc. High voltage linear tap changer
US6212967B1 (en) * 1998-02-02 2001-04-10 James G. Nugent Variable gear assembly and method
US20020131896A1 (en) * 2001-01-16 2002-09-19 Triangle Biomedical Sciences, Inc. Tissue processor
US20050061641A1 (en) * 2003-09-08 2005-03-24 Hernandez Augusto D. Step voltage regulator polymer position indicator with non-linear drive mechanism
WO2019179632A1 (de) 2018-03-23 2019-09-26 Schletter International B.V. Schwenkeinheit für eine nachführvorrichtung für solarmodule
US11990860B2 (en) 2018-03-23 2024-05-21 Schletter International B.V. Drive arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649247C2 (de) * 1976-10-29 1983-10-06 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Lastwähler für Stufentransformatoren
JPH0652688B2 (ja) * 1987-11-11 1994-07-06 株式会社東芝 負荷時タップ切換器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485965A (en) * 1966-10-14 1969-12-23 Reinhausen Maschf Scheubeck Selector switch for regulating transformers
US3597559A (en) * 1968-10-02 1971-08-03 Smit Nijemgen Electrotechnisch Geneva gear sectors mounted on a common shaft for the stepwise rotation of the switching contacts of rotary switches

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485965A (en) * 1966-10-14 1969-12-23 Reinhausen Maschf Scheubeck Selector switch for regulating transformers
US3597559A (en) * 1968-10-02 1971-08-03 Smit Nijemgen Electrotechnisch Geneva gear sectors mounted on a common shaft for the stepwise rotation of the switching contacts of rotary switches

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048868A (en) * 1976-06-18 1977-09-20 Lock William E Interrupted intermittent motion device
US4562316A (en) * 1984-06-07 1985-12-31 Asea Electric, Inc. High voltage linear tap changer
US6212967B1 (en) * 1998-02-02 2001-04-10 James G. Nugent Variable gear assembly and method
US20020131896A1 (en) * 2001-01-16 2002-09-19 Triangle Biomedical Sciences, Inc. Tissue processor
US6780380B2 (en) * 2001-01-16 2004-08-24 Triangle Biomedical Sciences, Inc. Tissue processor
US20050061641A1 (en) * 2003-09-08 2005-03-24 Hernandez Augusto D. Step voltage regulator polymer position indicator with non-linear drive mechanism
US20060196406A1 (en) * 2003-09-08 2006-09-07 Cooper Technologies Company Step Voltage Regulator Polymer Position Indicator with Non-Linear Drive Mechanism
US7343873B2 (en) 2003-09-08 2008-03-18 Cooper Technologies Company Step voltage regulator polymer position indicator with non-linear drive mechanism
US7614357B2 (en) * 2003-09-08 2009-11-10 Cooper Technologies Company Step voltage regulator polymer position indicator with non-linear drive mechanism
WO2019179632A1 (de) 2018-03-23 2019-09-26 Schletter International B.V. Schwenkeinheit für eine nachführvorrichtung für solarmodule
US20210021229A1 (en) * 2018-03-23 2021-01-21 Schletter International B.V. Pivoting unit for a tracking apparatus for solar modules
EP3769018B1 (de) * 2018-03-23 2024-05-01 Schletter International B.V. Schwenkeinheit für eine nachführvorrichtung für solarmodule
US11990860B2 (en) 2018-03-23 2024-05-21 Schletter International B.V. Drive arrangement
US12155345B2 (en) * 2018-03-23 2024-11-26 Schletter International B.V. Pivoting unit for a tracking apparatus for solar modules

Also Published As

Publication number Publication date
AT321415B (de) 1975-03-25
SE380667B (sv) 1975-11-10
NL7117177A (cg-RX-API-DMAC7.html) 1973-06-19
CA963692A (en) 1975-03-04
FR2170484A5 (cg-RX-API-DMAC7.html) 1973-09-14
IT969287B (it) 1974-03-30
NL145333B (nl) 1975-03-17
DE2260050B2 (de) 1974-06-12
DE2260050A1 (de) 1973-06-20
GB1399554A (en) 1975-07-02
DE2260050C3 (de) 1975-01-23

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