DK9400089U3 - Folding propeller, fixing shaft pins - Google Patents

Folding propeller, fixing shaft pins Download PDF

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Publication number
DK9400089U3
DK9400089U3 DK9400089U DK9400089U DK9400089U3 DK 9400089 U3 DK9400089 U3 DK 9400089U3 DK 9400089 U DK9400089 U DK 9400089U DK 9400089 U DK9400089 U DK 9400089U DK 9400089 U3 DK9400089 U3 DK 9400089U3
Authority
DK
Denmark
Prior art keywords
shaft pins
shaft
screw
folding propeller
propeller
Prior art date
Application number
DK9400089U
Other languages
Danish (da)
Inventor
Jack Skrydstrup
Original Assignee
Jack Skrydstrup
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 Jack Skrydstrup filed Critical Jack Skrydstrup
Priority to DK9400089U priority Critical patent/DK9400089U3/en
Application granted granted Critical
Publication of DK9400089U3 publication Critical patent/DK9400089U3/en
Priority to DE29501828U priority patent/DE29501828U1/en

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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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Description

DK 94 00089 U3DK 94 00089 U3

BeskrivelseDescription

BenævnelseDenominations

Foldepropel til anvendelse især på sejlbåde.Folding propeller for use especially on sailboats.

Frembringelsens anvendelsesområdeScope of production

Denne frembringelse angår befæstigelsen af propelbladene i en folde, af den type som især anvendes til sejlbåde, og som består af et nav, og 2 eller flere blade som er svingbart hængslede til navet.This arrangement relates to the attachment of the propeller blades in a fold, of the type especially used for sailboats, consisting of a hub, and 2 or more blades pivotally hinged to the hub.

Når motoren startes bringes propellen i rotation, og som en følge af primært centrifugalkraften, åbnes propellen, idet bladene (1) svinger om akseltappene (2) som er anbragt i navet (3). Se figur 1.When the engine is started, the propeller is rotated and, as a result of primarily the centrifugal force, the propeller opens, the blades (1) pivoting about the shaft pins (2) located in the hub (3). See Figure 1.

Når båden drives frem for sejl alene, og med motoren stoppet, vil vandstrømmen presse på propelbladene, således at disse foldes sammen. Se figur 2When the boat is driven forward for sails alone and with the engine stopped, the flow of water will press on the propeller blades so that they fold together. See Figure 2

Kendt teknikPrior art

Akseltappene omkring hvilke propelbladene svinger, er i de kendte foldepropeller fikseret i navet ved hjælp af en eller flere låseskruer, som regel pinolskruer.The shaft pins around which the propeller blades swing are fixed in the known folding propellers in the hub by means of one or more locking screws, usually pin screws.

For at forbedre fastholdelsen er der som regel en boret fordybning i akseltappen og der anbefales at påføre skruen en låselim i forbindelse med monteringen.In order to improve the retention, there is usually a drilled recess in the shaft pin and it is recommended to apply a screw glue in connection with the mounting.

I visse konstruktioner sikres akseltappene mod tab,, gennem anvendelse af splitter, spændestifter eller lignende.In certain designs, the shaft pins are secured against loss, by the use of splits, clamps or the like.

Det tekniske problem der skal løsesThe technical problem to be solved

Under havnemanøvrer med hyppige og kraftige "frem-bak" aktiviteter udsættes akseltappene i en foldepropel for kraftige rokkebevægelser som kan medføre at der opstår slør mellem låseskruen og akseltappen.During port maneuvers with frequent and powerful "backward" activities, the shaft pins in a folding propeller are subjected to strong rocking movements which may cause a veil between the locking screw and the shaft pin.

Efterhånden som sløret mellem skruen og akseltappen øges, vokser sandsynligheden for at en sikringsskrues funktion helt ødelægges, og en akseltap og dermed et propelblad falder af.As the blurring between the screw and the shaft pin increases, the likelihood that the function of a securing screw will be completely destroyed and a shaft pin and thus a propeller blade will fall off.

Konstruktionsprincippet med at anvende pinolskruer til fiksering af akseltappene, er kendt for at være upålideligt. Heller ikke udstrakt brug af låselime og kontraskruer, har løst problemerne med tab af propelblade i foldepropeller.The design principle of using pin screws to fix the shaft pins is known to be unreliable. Nor has the extensive use of locking glue and contrast screws solved the problems with the loss of propeller blades in folding propellers.

Med frembringelsen ønskes anvist et konstruktionsprincip som gennem friktion og kilevirkning eliminerer disse slør-tendenser, og derved sikrer akseltappene mod at falde af.With the production, it is desired to design a principle of construction which, through friction and wedge action, eliminates these blurring tendencies, thereby ensuring the shaft pins against falling off.

Den nye teknikThe new technique

Det nye ved frembringelsen udgøres af, at akseltappene fikseres i navet gennem en kilevirkning, som opstår i forbindelse med anvendelsen af et særligt udformet kilespor i akseltappen og anvendelsen af en dertil egnet skrue med plan eller konisk underside.The new feature in the production is that the shaft pins are fixed in the hub through a wedge action which arises in connection with the use of a specially designed wedge groove in the shaft pin and the use of a suitable screw with flat or tapered underside.

Den tekniske virkningThe technical impact

Skrue/akseltap-forbindelser udformet som vist i figurerne 4 ogScrew / shaft connections, as shown in Figures 4 and

Claims (3)

1. Foldepropel til skibe, især sejlbåde, bestående af to eller flere propelblade (l) som er svingbart hængslede i navet (3) og hvor akseltappene (2) er fastholdte i navet ved hjælp af låseskruer (4), som er nyt ved at akseltappene (2) er fastholdt af kilevirkningen mellem hovedet på en skrue og akseltappen som angivet i figur 5 og 61. Folding propeller for ships, in particular sailboats, consisting of two or more propeller blades (1) pivotally hinged in the hub (3) and the shaft pins (2) being retained in the hub by means of locking screws (4), which are new in that the shaft pins (2) are retained by the wedge action between the head of a screw and the shaft pin as shown in Figures 5 and 6 2. Foldepropel ifølge krav 1, som er nyt ved at akseltappene er forsynet med en nøgleflade som er tilpasset en skrues hovedform og -størrelse således at der opstår en kilevirkning mellem skrue og akseltap som vist på figur 7The folding propeller according to claim 1, which is new in that the shaft pins are provided with a key surface adapted to the head shape and size of a screw so that a wedge effect between the screw and the shaft pin is shown as shown in Figure 7 3. Foldepropel ifølge krav 1 og 2, som er nyt ved at sporet i akseltappen kan have flere udformninger som vist i figurerne 8 og 9Folding propeller according to claims 1 and 2, which is new in that the groove in the shaft pin can have several designs as shown in figures 8 and 9
DK9400089U 1994-02-22 1994-02-22 Folding propeller, fixing shaft pins DK9400089U3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK9400089U DK9400089U3 (en) 1994-02-22 1994-02-22 Folding propeller, fixing shaft pins
DE29501828U DE29501828U1 (en) 1994-02-22 1995-02-04 Folding propeller for water vehicles, especially sailing yachts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK9400089U DK9400089U3 (en) 1994-02-22 1994-02-22 Folding propeller, fixing shaft pins

Publications (1)

Publication Number Publication Date
DK9400089U3 true DK9400089U3 (en) 1994-04-08

Family

ID=8154673

Family Applications (1)

Application Number Title Priority Date Filing Date
DK9400089U DK9400089U3 (en) 1994-02-22 1994-02-22 Folding propeller, fixing shaft pins

Country Status (2)

Country Link
DE (1) DE29501828U1 (en)
DK (1) DK9400089U3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055210A1 (en) * 2013-10-14 2015-04-23 Flexofold Aps Folding propeller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015055210A1 (en) * 2013-10-14 2015-04-23 Flexofold Aps Folding propeller
DK178074B1 (en) * 2013-10-14 2015-05-04 Flexofold Aps Folding propeller
US10214269B2 (en) 2013-10-14 2019-02-26 Flexofold Aps Folding propeller

Also Published As

Publication number Publication date
DE29501828U1 (en) 1995-03-16

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