US3635319A - Drive release and positive stop device - Google Patents

Drive release and positive stop device Download PDF

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Publication number
US3635319A
US3635319A US64756A US3635319DA US3635319A US 3635319 A US3635319 A US 3635319A US 64756 A US64756 A US 64756A US 3635319D A US3635319D A US 3635319DA US 3635319 A US3635319 A US 3635319A
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Prior art keywords
gear
driven shaft
coupling member
latching
latching element
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Expired - Lifetime
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US64756A
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English (en)
Inventor
Alexander Bleibtreu
Josef Neumayer
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0027—Operating mechanisms
    • H01H9/0033—Operating mechanisms with means for indicating the selected tap or limiting the number of selectable taps

Definitions

  • a gear mechanism for operating [ap.changing regulating transformers includes means for automatically disconnecting U-S. a driven from a driving haft at predetermined i. 192/148 tions of the tap-changing mechanism and to then arrest the [51 Int. Cl ..F16d 65/30, Fl6d 71/00 driven shaft by positive action [58] FieldofSearch ..192/l5,28,35,36,33,71, 192/ 148, 149 22 Claims, 6 Drawing Figures l i i. J5 J 1' 55 E X7 M 35 T 1 I I PATENTEnJAmm 3.635.319
  • SHEET 2 [1F 4 BACKGROUND OF INVENTION It is often desirable to limit the range within which a tapchanging regulating transformer is allowed to operate. In other words, in such instances the range within the selector switch of a tap-changing regulating transformer is allowed to operate is subjected to predetermined limits which ought not to be exceeded, though the range of taps, and consequently the range of possible tap-changes which could be achieved with a particular piece of equipment, may be larger than a predetermined narrower range of tap-changes deemed desirable, or permissible, in any particular instance;
  • Another method of precluding operation of a tap-changing regulating transformer beyond a predetermined limit position consists in providing coupling means between the driving shaft and the driven shaft inhibiting further transmission of torques from the former to the latter when the tap-changing regulating transformer, and more particularly the selector switch thereof, have reached a predetermined limit position.
  • Such priorv art drives for tap-changing regulating transformers are bulky, complex and expensive. In addition to thesedrawbacks such drives are rather unreliable since they have a tendency to allow continued motion of the driven portion of the gear mechanism due to its inertia and inherent kinetic energy.
  • the invention relates to gears for operating tap-changing regulating transformers within predetermined limit positions which combine the advantages of prior art .gears of this description and eliminate the drawbacks of such prior art gears.
  • a gear drive embodying this invention includes a driving shaft and a driven shaft.
  • a gear is arranged in coaxial relation to and rotatable relative to the driven shaft. This gear is driven by the driving shaft and has latching means projecting axially outwardly from one of the end surfaces thereof.
  • the gear drive further includes a hub member fixedly mounted on said driven shaft for joint rotation with said driven shaft,'and being provided with abutment surfaces.
  • a latching element is arranged between said gear and said hub member acted upon by said latching means of said gear. This latching element'ineludes means for transmitting torques from said gear to both said hub member and said driven shaft, andsaid latching element is further provided with an abutment means.
  • the structure further includes a coupling member loosely mounted on said driven shaft and rotatable-though but to a limited extent-relative to said driven shaft.
  • the aforementioned coupling member has abutment means arranged to engage said abutment means on said latching element, and to be engaged by said abutment surfaces of said hub member, thus limiting the freedom of relative rotary motionof said coupling member and said hub member.
  • a gear structure embodying this invention includes normally ineffective latching means for the aforementioned coupling member. These latching means are movable from an ineffective position thereof to an effective position. In the latter they restrain by positive action rotary movement of the coupling member,
  • FIG. 1 is substantially a side elevation of a gear drive embodying the present invention. some parts of the same being broken away to expose to view other parts thereof;
  • FIG. 2 is a cross section of the structure of FIG. 1 taken along "-11 of FIG. 1;
  • FIG. 3 is a cross section of the structure of FIG. 1 taken along III-III of FIG. 1;
  • FIG. 4 is a top-plan view of the structure of FIG. 1, some parts of that structure situated at a relatively high level thereof having been deleted in FIG. 4;
  • FIG. 5 is an exploded isometric view of some of the parts of the structure of FIG. 1;
  • FIG. 6 is a section along VI-VI of FIG. 1.
  • reference numeral 10 has been applied to indicate a gear housing covered by housing cover 11 having an aperture at the top surface thereof. Housing 10 is filled with oil to lubricate the movable parts which are arranged therein.
  • Reference numeral 12 has been applied to indicate a driving shaft and reference numeral 13 has been applied to indicate a driven shaft driven by driving shaft 12. Both shafts 12,13 are supported by bearings which, in turn, are supported by gear housing 10.
  • Gear 15 is arranged in coaxial relation which shaft 13 and is driven by shaft 12. Driven shaft 13 supports gear 15 by the intermediary of roller bearings 14. Thus gear 15 is freely rotatable relative to driven shaft 13, and vice versa.
  • gear 15 Since gear 15 isloosely mounted on shaft 13 both are arranged in coaxial relation. Gear 15 combines a spur gear means 151 an a bevel gear means 152. Spur gear means 151 meshes with pinion l6 fixedly mounted on driven shaft 12 operated by the electric motor drive 19. Bevel .gear means 152 meshes with another bevel gear 17 fixedly mounted on a driving shaft 18. The latter is intended for manuallyoperating the mechanism whenever such operation is required. To this end shaft 18 may be provided with manually operable crank (not shown).
  • Gear 15 is provided with an abutment member or latching means 20 projecting axially outwardly from one of the end surfaces of gear 15.
  • Reference numeral 21 has been applied to indicate a substantially annular latchingelement having two abutment or latching surfaces 210.
  • Driven shaft 13 projects transversely through the opening defined by latching element 21.
  • the two surfaces 210 of latching element 21 are intended to be engaged by cooperating surfaces of abutment member or latching means 20.
  • FIGS. 2 and 3 show clearly how one of the surfaces 210 is engaged by one cooperating surface of abutment member or latching means 20 integral with gear 15.
  • Reference numeral 22 has been applied to indicate a crank having a hub member 221 fixedly mounted on driven shaft 13 and jointly rotatable with the latter.
  • Crank 22 is provided with a pin 13 projecting axially away from crank 22 and forming a fulcrum for annular latching element 21.
  • Latching element 21 is provided with a circular bore 21' juxtaposed to, or aligned with, pin 23 and receiving pin 23.
  • Crank 22 has two abutment surfaces 220 extending substantially radially relative to shaft 13 each intended to cooperate with, i.e., to be engaged by, one corresponding abutment surface 30 of a coupling member 26 which is described below more in detail.
  • Annular latching element 21 supports on the upper end surface thereof a hollow cylindrical axially extending projection 250. This projection performs two functions. It forms an abutment integral with latching element 21 and it further forms a brake housing receiving brake block 25 and its helical biasing spring 24.
  • Brake block 25 frictionally engages the upper end surface of gear 15.
  • Gear housing cover 11 supports a roller bearings 27 which, in turn, supports a coupling member 26.
  • Driven shaft 13 projects through coupling member 26 and the latter is loosely mounted on the former.
  • parts 13 and 26 are relatively rotatable.
  • Coupling member 26 is substantially in the shape of a toroid, and provided with a radially outwardly projecting flange 28.
  • the upper end of coupling member 26 is provided with a latch 29 and the flange portion 28 of coupling member 26 is provided with a pair of coupling claws or dogs 30 which are angularly displaced 180.
  • FIG. shows latch 29 but in a diagrammatic fashion, while FIG. 1 shows parts 26 and 29 more in detail. It is apparent from FIG. 1 that the coupling member 26 and the latch 29 are two distinct parts as indicated by different hatching thereof.
  • Latch 29 includes a radially inner annular portion which is mounted on the coupling member 26 proper. The aforementioned radially inner annular portion of latch 29 is keyed to coupling member 26 proper so as to preclude any relative pivotal motion between parts 26 and 29.
  • this invention it is immaterial whether or not parts 26 and 29 are two separate parts tied together, as explained above in connection with FIG. 1, or are a unitary structure, as suggested by FIG. 5.
  • the dogs or claws 30 of coupling member 26 are arranged to cooperate with, or engage with, the abutment surface 220 on crank 22 and to cooperate with, or engage with, brake housing 250 on latch 21.
  • Latch 29 and coupling member 26 are normally free to rotate jointly with driving shaft 13, a torque being transmitted from the upper end surface of part 221 to flange 28 in frictional engagement with part 221.
  • Parts 26,29 may be restrained by cooperating latch 31.
  • Latch 31 is supported by a leaf spring 32 tending to maintain latch 31 in the median position thereof shown in FIG. 4. In that position latches 31 and 29 are out of engagement, and parts 29,26 are free to rotate jointly with driven shaft 13 and hub member 221.
  • FIG. 6 shows latch 31 displaced out of its median position of FIG. 4, in cooperative engagement with latch 29 and thus precluding continued rotation of parts 29 and 26 jointly with driven shaft 13 and hub member 221.
  • Reference character 34 (see FIG. 1) has been applied to indicate a pair of cooperating spur gears of which the smaller is fixedly mounted on a portion of driven shaft 13 projecting through coupling member 26 out of gear housing 10.
  • the larger of the two meshing spur gears 14 is provided on the lower end surface thereof with a pair of angularly displaced abutment pins 35. Abutment pins 35 cooperate with a pivotable system of levers 33. Upon being engaged by one of pins 35 the lever system 33 pivots to its position shown in FIG. 6 and in so doing moves latch 31 out of its median position or ineffective position into its latching position or effective position wherein it engages latch 29 and restrains by positive action parts 29 and 26, thus causing cessation of the rotary motion thereof.
  • the driven shaft 13 operates a tap-changing regulating transformer, and more particularly the selector switch thereof not shown in the drawings. This is achieved by the interpositionof additional gear means, as shown more in detail in US. Pat. No. 3,176,089 to A. Bleibtreu et al. Mar. 30, 1965 for LOAD TAP CHANGERS FOR TRANSFORMERS, in U.S. Pat. No. 3,299,049 to A. Bleibtreu, Feb. I, 1966 for IN- TEGRAL SELECTOR SWITCH AND TRANSFER SWITCH UNIT FOR TAPPED REGULATING TRANSFORMERS, and in US. Pat. No. 3,396,254 to A. Bleibtreu, Aug.
  • latch 31 engages latch 29 on coupling member 26. This precludes further rotation of coupling member 26 jointly with driven shaft 13 and hub member 221.
  • latching element 21 In the arrested position of coupling member 26 one of its claws or dogs 30 is engaged by the cap or brake housing 250 of latching element 21. This precludes any further movement of latching element 21 at the point of engagement ofparts 30 and 250.
  • latching element 21 On the other hand, latching element 21 is still free to move at the point thereof diametrically opposite to the abutment surface thereof formed by hollow cylindrical cap or brake housing 250.
  • the second step or phase in the process of arresting driven shaft 13 consists in precluding by positive action any further rotation of driven shaft 13. Driven shaft 13 is precluded by positive action from further rotation by virtue of an engagement of one of the abutment surfaces 220 of crank 22 by one of the abutment surfaces, dogs, or claws 30 of coupling member 26.
  • This limit position has been shown in FIG. 3, where the upper abutment surface, dog, or claw 30 is shown to be engaged by the upper abutment surface 220 of crank 22, both engaging surfaces being indicated in this figure in dotted lines.
  • FIGS. 1-6 The following is a brief summary of the mode of operation of the structure of FIGS. 1-6:
  • coupling member 26 includes a portion situated inside of the space bounded by gear housing 111 and housing cover 11 and another portion situated outside the aforementioned space.
  • the latch 29 is situated outside that space.
  • the size the opening defined by latching element 21 and the outer diameter of hub member 221 are so coordinated as to cause cooperative abutting engagement of hub member 221 and the radially inner edge of latching element 21 upon engagement by one of abutment means or dogs 30 of coupling member 26 by one of the abutment surfaces 220 of hub member 221.
  • a gear drive for tap-changing regulating'transformers including a. a driving shaft (12,18);
  • a gear (15 arranged in coaxial relation to, and rotatable relative to, said driven shaft (13) and driven by said driving shaft (12,18), said gear (15) having latching means projecting axially outwardly from one of the end surfaces thereof;
  • a latching element (21) arranged between said gear (15) and said hub member (22) cooperating with said latching means (20) of said gear (15) and including means (21,23) for transmitting torques from said 'gear (15) to both said hub member (221) and driven shaft (13), said latching element (21) being further provided with an abutment means (250);
  • normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position thereof to an effective position thereof to restrain rotary movement of said coupling member (26) and to restrain rotary movement of both said hub member (221) and said driven shaft (13) upon engagement of said abutment means (30) of said coupling member (26) by one of said abutment surfaces (220) of said hub member (221).
  • gear (15) is a dual function gear provided with spur gear means (151) and with bevel gear means (152), one of said gear means meshing with motor driven gear (16) and the other of said gear means meshing with a manually driven gear (17).
  • said coupling member (26) is provided with a flange (28) having a larger diameter than said coupling member, wherein said flange (28) is provided with said abutment means (30), and wherein said abutment means (30) are formed by a pair of claws.
  • a gear drive for tap-changing regulating transformers having a driving shaft, a driven shaft operated by said driving shaft and a coupling mechanism interposed between said driving shaft and said driven shaft, said coupling mechanism including a. a gear (15) loosely mounted on said driven shaft (13) and rotatable relative to said driven shaft (13), said gear (15) having a torque-transmitting projection (20) extending axially outwardly from one of the end surfaces thereof;
  • annular latching element (21) having a pair of latching surfaces (210) cooperating with said projection (20) of said gear (15) to transmit torques from said gear (15) to said latching element (21 said latching element (21) being further provided with an abutment means (250) projecting axially outwardly from said latching element;
  • crank (22) mounted on said driven shaft (13) for joint rotation with said driven shaft (13), said crank including fulcrum means (23) pivotally connecting said crank (22) to said latching element (21), and said crank further including a pair of substantially radially oriented abutment surfaces (220);
  • normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position thereof to an effective position thereof to restrain rotary movement of said coupling member (26) and to further restrain rotary movement of both said crank (22) and said driven shaft (13) upon engagement of one of said abutment surfaces (220) of said crank (22) by one of said pair ofdogs (30) of said coupling member (26).
  • a gear drive as specified in claim 8 wherein said gear (15) is a dual function gear provided with a pair of gear means, one of said pair of gear means being a spur gear means (151) and the other of said gear means being a bevel gear means (152), and wherein one of said pair of gear means is adapted to be driven by motor means (19) and the other of said pair of gear means is adapted to be driven manually.
  • a gear drive as specified in claim 8 wherein the inner diameter of said annular latching element (21) and the outer diameter of a hub (221) of said crank (22) mounted on said driven shaft (13) are coordinated in such a way that said hub (221) of said crank (22) engages said annular latching element (21) upon engagement of one of said pair of abutment surfaces (220) of said crank (22) by one of said pair of dogs (30) of said coupling member (26).
  • a gear drive as specified in claim 13 wherein said gear (15 said latching element (21) and said flange portion (28) of said coupling member (26) are arranged within a gear housing provided with a cover (11), wherein said portion of said coupling element (26) of relatively small diameter projects through said cover (11) to the outside of the space defined by said gear housing (10) and by said cover (11), and wherein said latch (29) is situated outside of said space defined by said gear housing (10) and said cover (11).
  • a gear drive as specified in claim 8 including a. a gear of relatively small diameter fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13);
  • a gear drive for tap-changing regulating transformers including a. a driving shaft (12,18);
  • a hub member (221 fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft 13) and including a pair of abutment surfaces (220) projecting substantially radially outwardly from said driven shaft (13);
  • a coupling member (26) having a surface in abutting relation with said hub member (221) and being loosely mounted on said driven shaft (13), said coupling member (26) having abutment means (30) cooperating with said abutment surfaces (220) of said hub member (221) to limit the freedom of relative rotary motion of said coupling member (26) on the one hand, and said hub member (26) and said driven shaft (13), on the other hand,
  • a gear drive as specified in claim 16 including a. a gear housing (10) and a cover (11) therefore having an aperture on one side thereof, said gear (15), said hub member (221) and said combined latching and torquetransmitting means (20,21,22,23) being arranged inside of the space bounded by said gear housing (10) and said cover (11), and said coupling member (26) being arranged in part inside of aid space and in part outside of said space and projecting through said aperture in said cover; and
  • a mechanical power transmission (34,35,33) arranged outside of said space, said transmission being operated by one end of said driven shaft (13) projecting through said coupling member (26) to the outside of said space and said transmission (34,35,33) controlling said normally ineffective latching means (3l,29) to render said normally ineffective latching means effective upon a predetermined number of revolutions of said driven shaft (13).
  • a gear drive for tap-changing regulating transformers including a. a driving shm (12,18) supporting a driving gear (16,17);
  • normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position to an effective position thereof and compelling in said effective position by positive action cessation of rotary motions of said coupling member (26) about said driven shaft (13); h. means (34,35,33) responsive to the rotary motion of said driven shaft (13) for moving said normally ineffective latching means (31,29) from said ineffective position to said effective position;
  • a gear drive as specified in claim 21 including means in the nature of a friction brake (24,25) supported by said annular latching element (21) establishing a frictional connection between said annular latching element (21) and said gear (15
US64756A 1969-10-03 1970-08-18 Drive release and positive stop device Expired - Lifetime US3635319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691949906 DE1949906B2 (de) 1969-10-03 1969-10-03 Lastgetriebe mit einstellungseinrichtung fuer den antrieb von stufenschaltern fuer regeltransformatoren

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US3635319A true US3635319A (en) 1972-01-18

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US64756A Expired - Lifetime US3635319A (en) 1969-10-03 1970-08-18 Drive release and positive stop device

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US (1) US3635319A (fr)
JP (1) JPS5244005B1 (fr)
AT (1) AT301698B (fr)
BG (1) BG20832A3 (fr)
DE (1) DE1949906B2 (fr)
FR (1) FR2064965A5 (fr)
GB (1) GB1268287A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982616A (en) * 1975-07-25 1976-09-28 Textron, Inc. Latch operated centrifugally released safety clutch for saws
US5190503A (en) * 1991-12-16 1993-03-02 Sundstrand Corporation Geared rotary actuator with internal stop mechanism
ES2403779A1 (es) * 2010-05-19 2013-05-21 Gave Electro, S.L. Seccionador eléctrico perfeccionado motorizado.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3042416A1 (de) * 1980-11-11 1982-06-16 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Lastgetriebe mit endstellungsentkupplung fuer den antrieb von stufenschaltern fuer stufentransformatoren
DE3421346A1 (de) * 1984-06-08 1985-12-12 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Aus lastumschalter und stufenwaehler bestehender stufenschalter mit mechanischer endstellungsbegrenzung
US5162636A (en) * 1990-01-17 1992-11-10 E.G.O. Elektro-Gerate Blanc U. Fischer Electric cooking means
DE4004309A1 (de) * 1990-02-13 1991-08-14 Ego Elektro Blanc & Fischer Anzeigeeinrichtung fuer kochgeraete
RU2431884C2 (ru) 2006-08-25 2011-10-20 Абб Текнолоджи Лтд Электрический двигатель для переключателя отводов под нагрузкой

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765527A (en) * 1928-04-07 1930-06-24 Selectograph Company Clutch mechanism
US1919651A (en) * 1926-05-04 1933-07-25 Gen Register Corp Clutch
US3173392A (en) * 1961-08-11 1965-03-16 Pfaff Ag G M Thread trimming mechanism for lock stitch sewing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919651A (en) * 1926-05-04 1933-07-25 Gen Register Corp Clutch
US1765527A (en) * 1928-04-07 1930-06-24 Selectograph Company Clutch mechanism
US3173392A (en) * 1961-08-11 1965-03-16 Pfaff Ag G M Thread trimming mechanism for lock stitch sewing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982616A (en) * 1975-07-25 1976-09-28 Textron, Inc. Latch operated centrifugally released safety clutch for saws
US5190503A (en) * 1991-12-16 1993-03-02 Sundstrand Corporation Geared rotary actuator with internal stop mechanism
ES2403779A1 (es) * 2010-05-19 2013-05-21 Gave Electro, S.L. Seccionador eléctrico perfeccionado motorizado.

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Publication number Publication date
DE1949906A1 (de) 1971-04-08
AT301698B (de) 1972-09-11
DE1949906B2 (de) 1971-10-21
FR2064965A5 (fr) 1971-07-23
GB1268287A (en) 1972-03-29
BG20832A3 (fr) 1975-12-20
JPS5244005B1 (fr) 1977-11-04

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