EP1967447A2 - Heckantrieb, insbesondere für Boote mit zwei Propellern - Google Patents

Heckantrieb, insbesondere für Boote mit zwei Propellern Download PDF

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Publication number
EP1967447A2
EP1967447A2 EP08001173A EP08001173A EP1967447A2 EP 1967447 A2 EP1967447 A2 EP 1967447A2 EP 08001173 A EP08001173 A EP 08001173A EP 08001173 A EP08001173 A EP 08001173A EP 1967447 A2 EP1967447 A2 EP 1967447A2
Authority
EP
European Patent Office
Prior art keywords
drive
fitted
shaft
box
stern
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.)
Withdrawn
Application number
EP08001173A
Other languages
English (en)
French (fr)
Inventor
Alberto Amici
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.)
R T N Srl
Original Assignee
R T N Srl
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 R T N Srl filed Critical R T N Srl
Publication of EP1967447A2 publication Critical patent/EP1967447A2/de
Withdrawn legal-status Critical Current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
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • B63H23/04—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing the main transmitting element, e.g. shaft, being substantially vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • B63H23/08—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing with provision for reversing drive

Definitions

  • the invention relates to a stem-drive unit for boats, which is designed to be fitted to boats with an inclined hull.
  • the mechanical units are separated from the supporting structure, which is made in the form of a number of arms integral with a plate fixed to the keel of the boat; said arms carry bushings or sleeves that support the mechanical units, which are covered by a shell designed to enhance the hydrodynamics of the system.
  • the result is a light drive which is easily adaptable at low cost to the various keel configurations used by different boat builders.
  • a drive unit forming the subject of patent application PC 2002 A 027, which comprises (i) a transmission with two coaxial bevel gears, fitted opposite one another on the same engine shaft, which engage a bevel gear mounted on a shaft orthogonal to the preceding one, and (ii) means designed to make one or other of said bevel gears integral with said engine shaft, in order to control the rotation of the shaft leading to the propellers in one direction or the opposite direction.
  • figure 1 shows a boat keel in cross-section along a plane orthogonal to the boat axis
  • figure 2 shows a stern drive of known type.
  • no. 1 indicates the keel of a boat with a V-shaped hull and slanting walls.
  • No. 2 indicates the stiffening structures of the boat, which are arranged longitudinally, with engine unit 3 mounted on them.
  • Engine output shaft 4 is connected to propeller shaft 5 via a drive which, in known solutions, comprises a motion inverter 6 and a vertical shaft 7, which in turn is connected to propeller shaft 5 via a bevel gear pair or other known system.
  • the parts downstream of the inverter are housed in a casing 8 made of metal of suitable thickness (approx. 20-30 mm), integral with a plate 9 used to secure the whole assembly to the boat.
  • Said casing has a considerable weight, of several hundred kilos, which it would be useful to reduce as far as possible.
  • Figure 1 shows two possible embodiments of the casing.
  • plate 10 is inclined in relation to the body which encloses shaft 7, at an angle equal to the angle ⁇ formed between the bottom wall of the boat and the horizontal plane.
  • the axis of shaft 7 intersects with the axis of engine shaft 4, which is the ideal solution in kinematic terms, because it enables motion to be transmitted between the two shafts via a simple bevel gear pair.
  • that solution requires a different casing to be made for each type of boat, to adapt the assembly to the specific keel configuration.
  • the casing consists of a plate to which are fixed two V-shaped arms which terminate with a sleeve, and a third straight central arm, which also terminates with a sleeve, aligned with the preceding one.
  • the mechanical parts are made in the form of separate units, which are assembled and mounted on said sleeves, and the whole assembly is completed by a fairing made of fibreglass or other light, low-cost material.
  • the drive unit comprises a supporting structure 10, on which are mounted the various parts that transmit motion from inverter 6 to the propeller.
  • said supporting structure comprises a plate 11 designed to be fixed to the structure of the boat in accordance with a known technology, to which three arms, 12, 13 and 14, are welded or otherwise secured.
  • the first two of said arms, 12 and 13 are located in the front part of the plate and arranged in a V shape; the upper ends are at a distance from one another and welded to the plate, while the lower ends converge and are welded to a bushing or sleeve 15, coaxial with propeller shaft 5.
  • the third shaft 14 is located in the rear part of plate 11, in a central position, and supports a second sleeve 16, coaxial with the preceding one, at the lower end.
  • Shaft 7 passes into a cylindrical body or box 18, and the two shafts 5 and 7 are connected via an angular transmission of known type not illustrated in the figure.
  • Seal elements also of known type, are inserted between shafts 5 and 7 and their respective boxes.
  • the structure is preferably, but not necessarily, completed by a fairing, made of a light material such as fibreglass, composite or plastic, consisting of one or more parts 19, which is designed to improve the hydrodynamics of the system.
  • a fairing made of a light material such as fibreglass, composite or plastic, consisting of one or more parts 19, which is designed to improve the hydrodynamics of the system.
  • the boxes, with systems that provide the seal around the rotating shafts, are known and can be made at limited cost, while the supporting structure described above, with a pair of sleeves fixed to the ends of arms welded to a plate secured to the boat, is light and easily adapted to a wide variety of hull inclinations, merely by varying the length of the arms, with no need to modify moulds or anything else.
  • the drive unit structure obtained with the solution described is light and easily adapted to a wide variety of keel geometries at low cost.

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)
  • General Details Of Gearings (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Socks And Pantyhose (AREA)
EP08001173A 2007-03-07 2008-01-23 Heckantrieb, insbesondere für Boote mit zwei Propellern Withdrawn EP1967447A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000018A ITPC20070018A1 (it) 2007-03-07 2007-03-07 Tramissione del tipo a piede poppiero, in particolare per imbarcazione bielica

Publications (1)

Publication Number Publication Date
EP1967447A2 true EP1967447A2 (de) 2008-09-10

Family

ID=39531375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08001173A Withdrawn EP1967447A2 (de) 2007-03-07 2008-01-23 Heckantrieb, insbesondere für Boote mit zwei Propellern

Country Status (3)

Country Link
US (1) US20080220671A1 (de)
EP (1) EP1967447A2 (de)
IT (1) ITPC20070018A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015137746A1 (ko) * 2014-03-12 2015-09-17 송길봉 원심력 추진장치 및 이를 포함하는 선박

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009033554A1 (de) * 2009-07-16 2011-01-20 Reintjes Gmbh Propellergondel
CN107745782A (zh) * 2017-09-28 2018-03-02 广船国际有限公司 一种艉轴架的安装方法
CN116513431B (zh) * 2023-06-19 2024-03-08 广州打捞局 推进器安装结构及推进器水下安装方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974628A (en) * 1958-10-20 1961-03-14 Robert W Erlbacher Twisted strut construction for marine bearing with forwardly mounted propeller
US3583356A (en) * 1969-09-15 1971-06-08 Chris Craft Ind Inc Propeller shaft coupling for marine cruisers
US3707939A (en) * 1970-11-16 1973-01-02 Schottel Of America Inc Steering assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015137746A1 (ko) * 2014-03-12 2015-09-17 송길봉 원심력 추진장치 및 이를 포함하는 선박

Also Published As

Publication number Publication date
US20080220671A1 (en) 2008-09-11
ITPC20070018A1 (it) 2008-09-08

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