EP0140233A2 - Hélice à pales repliables - Google Patents

Hélice à pales repliables Download PDF

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Publication number
EP0140233A2
EP0140233A2 EP84112136A EP84112136A EP0140233A2 EP 0140233 A2 EP0140233 A2 EP 0140233A2 EP 84112136 A EP84112136 A EP 84112136A EP 84112136 A EP84112136 A EP 84112136A EP 0140233 A2 EP0140233 A2 EP 0140233A2
Authority
EP
European Patent Office
Prior art keywords
propeller
hub
folding
wing
driver
Prior art date
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.)
Granted
Application number
EP84112136A
Other languages
German (de)
English (en)
Other versions
EP0140233A3 (en
EP0140233B1 (fr
Inventor
Giovanni Fabio
Pasquale Soldano
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84112136T priority Critical patent/ATE25951T1/de
Publication of EP0140233A2 publication Critical patent/EP0140233A2/fr
Publication of EP0140233A3 publication Critical patent/EP0140233A3/de
Application granted granted Critical
Publication of EP0140233B1 publication Critical patent/EP0140233B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/20—Hubs; Blade connections
    • B63H1/22—Hubs; Blade connections the blades being foldable
    • B63H1/24—Hubs; Blade connections the blades being foldable automatically foldable or unfoldable

Definitions

  • the object of the invention is to pivot the propeller blades from their folded closed position into their unfolded spreading position regardless of the direction of rotation of the propeller in the known folding wing propellers of this type with the aid of structurally simple, easy to produce, inexpensive means, regardless of the direction of rotation of the propeller, ie automatically when the propeller is driven Propeller shaft both in forward travel and in To achieve reverse travel with the same operational safety.
  • the propeller blades with their bearing journals are mounted on a bush-shaped wing holder which is coaxial with the propeller axis and on which the propeller shaft is rotatably connected to the propeller shaft to a limited extent, and the bearing eyes of the propeller blades which are formed coaxially with the bearing journals with an intermediate segment arranged, double-sided, non-rotatable but axially displaceably coupled to the wing holder engaged rack, with which axially displaceable but non-rotatable a helical driver is coupled, which is screwed with its external thread into the internal thread of an axial bore of the propeller hub and through Rotation of the wing holder relative to the propeller hub is adjustable between two end positions defined by end stops.
  • the external thread of the screw-shaped driver and the corresponding internal thread of the axial bore of the propeller hub have a direction of inclination opposite to the direction of rotation of the propeller shaft when driving forward, i.e. when the propeller shaft rotates in the forward direction, the mentioned threads are left-handed or when the propeller shaft rotates in the forward direction they are mentioned Right-hand thread, with the propeller blades in between in the closed position of the propeller blades folded forward is displaced in the direction of the propeller shaft and the screw-shaped driver which engages with this toothed rack via a driver stop lies in its front end position against the corresponding end stop.
  • the helical driver which is stopped in its front end position, is coupled in a rotationally fixed manner to the propeller shaft and immediately takes the wing holder with it in rotary motion via the rack.
  • the propeller shaft is rotated in the opposite direction, ie the direction corresponding to the backward movement
  • the water resistance acting on the propeller blades initially causes the propeller hub to rotate to a limited extent relative to the wing holder.
  • the helical driver is again non-rotatably coupled to the propeller shaft and rotates the wing holder via the rack.
  • the propeller blades are loaded by closing springs in the direction of their folded closed position. This ensures a safe, complete folding of the propeller blades, regardless of the wing shape and pitch, especially at the very beginning of the sailing trip and at very low sailing speeds.
  • 1 denotes the propeller shaft of a sailboat, which can be driven by an auxiliary motor either in two opposite directions of rotation Fl and F2 for the forward and reverse travel Fa or Fi.
  • the propeller hub 4 of a folding vane propeller is fastened with the aid of a wedge 2 and a nut 3 screwed onto a thread set 101 of the shaft 1.
  • This axial bore 5 is on the rear with respect to the direction Fa of the forward travel, i.e. from the side facing away from the propeller shaft 1 and has an internal thread 105.
  • a bush-shaped wing holder 6 which is coaxial with the propeller axis, is rotatably but axially immovable.
  • the wing holder 6 consists of two half-bush holder halves 106 and 206, which are connected to one another by centering pins 7 and by fastening screws 8 and encompass a radially projecting end flange 104 of the propeller hub 4.
  • two propeller blades 9 are pivotally mounted on opposite sides of the propeller axis about trunnion 10 directed transversely to the propeller axis.
  • the ends of the bearing journals 10 are fixed in a rotationally fixed manner in corresponding bores 11 of the webs 306.
  • the bearings 12 of the two propeller blades 9 are formed on the circumference as toothed segments 112. These toothed segments 112 of the wing bearing eyes 12 are in engagement with a double-sided toothed rack 13 arranged between them coaxially to the propeller axis, which has a non-round, for example rectangular cross section and is longitudinally displaceable through a suitable, non-round, for example rectangular bore 14 of the wing holder 6.
  • a double-sided toothed rack 13 arranged between them coaxially to the propeller axis, which has a non-round, for example rectangular cross section and is longitudinally displaceable through a suitable, non-round, for example rectangular bore 14 of the wing holder 6.
  • the two propeller blades 9 are coupled to one another in such a way that they can only be pivoted outwards or inwards on their bearing journals 10 at the same time, ie they can be unfolded and folded up simultaneously.
  • the rack 13 which is rectangular in cross section, through a suitable, rectangular bore 14
  • a clutch slide 16 engages non-rotatably but longitudinally displaceably, which correspondingly non-circular e.g. has a hexagonal cross-section and is connected to the rack 13 in a rotationally fixed manner, in particular in one piece with it.
  • Each propeller blade 9 has a closing spring 17 designed as a helical torsion spring, which is arranged in an end extension 212 of the bore of the corresponding wing bearing eye 12 and is fastened with its inner end to the blade bearing eye 12 and with its outer end to the associated web 306 of the blade holder 6.
  • closing springs 17 endeavor to fold the propeller blades 9 into their axially rearward closing position according to FIG. 1.
  • the helical driver 15 With pure sailing, i.e. when the auxiliary motor is switched off and the propeller shaft 1 is stationary, the helical driver 15 is in a front end position, shown in FIG. 1, in which its front end against the nut 3 of the propeller shaft 1, i.e. bears against an end stop connected to the propeller shaft 1 or to the propeller hub 4 in a rotationally fixed manner.
  • the propeller blades 9 are folded together by the associated closing springs 17 and by the water flow and are in their axially rearwardly directed closing position.
  • the helical driver 15 When the sailboat is motor-driven, if the propeller shaft is rotated in the direction Fl corresponding to the forward travel Fa, the helical driver 15 remains in its front end position and becomes stronger against the corresponding end stop (nut 3) pressed (screwed in). The helical driver 15 is consequently coupled in a rotationally fixed manner to the propeller hub 4 and the propeller shaft 1 and takes the wing holder 6 immediately via the coupling slide 16 and the toothed rack 13 in rotary motion. The propeller blades 9 are folded apart by the centrifugal force against the closing action of the springs 17 in their spreading position, as shown in FIG. 3. The rack 13 is pushed through the toothed segments 112 of the wing bearing eyes 12 to the rear, ie away from the propeller shaft 1, but remains in engagement with the driver 15.
  • the propeller blades 9 When the motor drive is switched off during the reverse drive Fi, the propeller blades 9 can be folded into their axially rearward closing position by the closing springs 17 and the water flow if the helical driver 15 via the toothed segments 112 of the wing bearing eyes 12 and the toothed rod 13 with the clutch slide 16 pushed forward in the axial direction and, as a result, can be screwed into its front end position according to FIG. 1 with simultaneous rotation. Otherwise, the propeller shaft 1 must be driven briefly in the direction of rotation Fi corresponding to the forward movement Fa.
  • the propeller hub 4 is first rotated relative to the helical driver 15, braked by the water resistance via the propeller blades 9, the blade holder 6, the toothed rack 13 and the clutch slide 16, in such a way that it moves into its front end position 1 is brought (screwed).
  • a radial grease injection bore 18 is provided in the propeller hub 4 in the area of the nut 3, which opens into the axial bore 5 of the propeller hub 4 and can be closed by a screw 19.
  • the screw 19 can also serve for the non-rotatable fixing of the fastening nut 3.
  • Continuous, axially parallel bores 20 for the lubricant are provided in the clutch slide 16.
  • further axially parallel bores 21 are provided which connect the interior of the axial bore 5 of the propeller hub 4 with the space between the outer webs 306 of the wing holder 6 and the supply of the lubricating grease to the rack 13 and the toothed sectors 112 Allow wing bearing eyes 12 or on the pivot bearing of the propeller blades 9.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Soil Working Implements (AREA)
  • Fluid-Damping Devices (AREA)
  • Harvester Elements (AREA)
  • Toys (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
EP84112136A 1983-10-19 1984-10-10 Hélice à pales repliables Expired EP0140233B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112136T ATE25951T1 (de) 1983-10-19 1984-10-10 Faltfluegelpropeller.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT12647/83A IT1172650B (it) 1983-10-19 1983-10-19 Elica a pale mobili angolarmente rispetto l'asse dell'ogiva mozzo per effetto dell'albero motore
IT1264783 1983-10-19

Publications (3)

Publication Number Publication Date
EP0140233A2 true EP0140233A2 (fr) 1985-05-08
EP0140233A3 EP0140233A3 (en) 1985-06-12
EP0140233B1 EP0140233B1 (fr) 1987-03-18

Family

ID=11142468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112136A Expired EP0140233B1 (fr) 1983-10-19 1984-10-10 Hélice à pales repliables

Country Status (4)

Country Link
EP (1) EP0140233B1 (fr)
AT (1) ATE25951T1 (fr)
DE (1) DE3462674D1 (fr)
IT (1) IT1172650B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001973A1 (fr) * 1991-07-25 1993-02-04 Gori Af 1902 A/S Helice pliable avec au moins deux pales
EP4778824A1 (fr) 2025-01-17 2026-07-22 Bsi A/S Procédé de fonctionnement d'un bateau à voile comprenant un moteur électrique, et hélice

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102451679B1 (ko) * 2016-03-30 2022-10-07 삼성전자주식회사 무인 비행체
DE102020129938A1 (de) 2020-11-12 2022-05-12 Torqeedo Gmbh Faltpropeller

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US866369A (en) * 1907-02-23 1907-09-17 Arthur W Learnard Propeller.
SE392855B (sv) * 1975-08-22 1977-04-25 S I Astrand Propeller med fellbara blad
SE7801345L (sv) * 1978-02-06 1979-08-07 Hasselfors Stainless Anordning vid hopfellbara propellrar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993001973A1 (fr) * 1991-07-25 1993-02-04 Gori Af 1902 A/S Helice pliable avec au moins deux pales
EP4778824A1 (fr) 2025-01-17 2026-07-22 Bsi A/S Procédé de fonctionnement d'un bateau à voile comprenant un moteur électrique, et hélice

Also Published As

Publication number Publication date
DE3462674D1 (en) 1987-04-23
EP0140233A3 (en) 1985-06-12
IT8312647A0 (it) 1983-10-19
ATE25951T1 (de) 1987-04-15
IT1172650B (it) 1987-06-18
EP0140233B1 (fr) 1987-03-18

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