NO20191370A1

NO20191370A1 - Electric battery-powered motor and driveline for propelling smaller boats

Info

Publication number: NO20191370A1
Application number: NO20191370A
Authority: NO
Inventors: Olav Skyllingstad
Original assignee: Olav Skyllingstad
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2021-05-19

Description

Patentbeskrivelsen The patent description

Elektrisk batteridrevet motor og drivlinje for bruk til fremdrift av mindre båter i fartsområdet 3 til 6 knop. Electric battery-powered motor and driveline for use in propelling smaller boats in the speed range 3 to 6 knots.

Oppfinnelsen anvendelsesområde er primært ettermontering for hybriddrift av båter med eksisterende innenbords diesel- eller bensinmotor og propellaksel. Den kan også monteres på båter, nye og brukte, som eneste fremdriftsmotor. The invention's area of application is primarily retrofitting for hybrid operation of boats with an existing inboard diesel or petrol engine and propeller shaft. It can also be fitted to boats, new and used, as the sole propulsion engine.

Dagens elektrisk drevne båter, hybrid eller ren elektrisk, benytter elektriske motorer som roterer med høyt turtall koblet til et reduksjonsgir som reduserer turtallet til noe i nærheten av propellturtallet. Slike elektromotorer er avhengige av viftekjøling for å holde temperaturen nede under drift. I tillegg er mange av dem ikke beregnet for drift i et sjøvannsmiljø, og dette må antas å påvirke levetiden. Today's electrically powered boats, hybrid or pure electric, use electric motors that rotate at high rpm connected to a reduction gear that reduces the rpm to something close to the propeller rpm. Such electric motors depend on fan cooling to keep the temperature down during operation. In addition, many of them are not intended for operation in a seawater environment, and this must be assumed to affect their lifespan.

I sin søken etter elektriske motorer som har et turtall i nærheten av propellturtallet uten reduksjons gir, samtidig som behovet for kjøling var redusert, helst eliminert, fant søker at nav motorer beregnet for montering i senter av et fremdriftshjul på et kjøretøy var vel egnet. Slike motorer roterer omkring en stillestående aksel, og kjøles derfor direkte i kontakt med omgivende luft. Elektromotoren som ble benyttet i prototypen har et turtall i området 650 – 800 omdreininger/min. In his search for electric motors that have a speed close to the propeller speed without a reduction gear, while the need for cooling was reduced, preferably eliminated, the applicant found that hub motors intended for mounting in the center of a propulsion wheel on a vehicle were well suited. Such motors rotate around a stationary shaft, and are therefore cooled directly in contact with the surrounding air. The electric motor that was used in the prototype has a speed in the range of 650 - 800 revolutions/min.

Elektromotorer beregnet for montering i et hjul på et kjøretøy er i tillegg konstruert for røft miljø med sprut av salt- og støvholdig vann og andre forurensninger. Electric motors intended for installation in a wheel of a vehicle are also designed for harsh environments with splashes of salt and dusty water and other pollutants.

Søker er ikke kjent med at denne type elektromotor benyttes i en tilsvarende bruk i markedet. The applicant is not aware of this type of electric motor being used in a similar application in the market.

Forskjellige patenter omhandler hybriddrift av båt. Eksempler er: Various patents deal with hybrid operation of boats. Examples are:

- US20090209146A1 - US20090209146A1

- US9669698B2 - US9669698B2

- US9586666B2 - US9586666B2

Disse beskriver forskjellige former for inn- og utkobling av elektromotoren, men sier ingenting om utformingen av denne. These describe different forms of switching on and off the electric motor, but say nothing about its design.

Figur 1 viser en typisk installasjon av oppfinnelsen i en båt med diesel- eller bensinmotor og konvensjonell propellaksel sett fra siden. Forbrenningsmotoren (1) kan være diesel eller bensin. (2) viser kombinert reduksjons gir/frikobling. (3) og (4) viser propell og propellaksel. Figure 1 shows a typical installation of the invention in a boat with a diesel or petrol engine and a conventional propeller shaft seen from the side. The internal combustion engine (1) can be diesel or petrol. (2) shows combined reduction gear/disengagement. (3) and (4) show the propeller and propeller shaft.

Oppfinnelsen er montert på en ramme og det hele er koblet sammen med propellakselen ved hjelp av en tannreim. Rammen kan plasseres over, eller ved siden av propellakselen. The invention is mounted on a frame and the whole is connected to the propeller shaft by means of a toothed belt. The frame can be placed above or next to the propeller shaft.

Figur 2 viser det samme som figur 1 sett ovenfra. Figure 2 shows the same as Figure 1 seen from above.

Figur 3 viser oppfinnelsen komplett med tilbehør for kobling til propellaksel. Figure 3 shows the invention complete with accessories for connection to the propeller shaft.

Figur 4 viser det samme som figur 3 sett ovenfra. Figure 4 shows the same as Figure 3 seen from above.

Figur 5 viser oppfinnelsen sett forfra i retning mot propellen. Figure 5 shows the invention seen from the front in the direction towards the propeller.

Festene for felgen på elektromotoren (5) er fjernet, og derfor ikke vist. The fasteners for the rim on the electric motor (5) have been removed, and are therefore not shown.

Claims

The shaft (10) is screwed into the frame (12) with the nut (14).) The shaft (10) at the opposite end of the electric motor (5) (not visible in the drawing) is truncated to make the intermediate piece (16) as short as possible.

The electric motor (5) is connected to the output motor shaft (15) with an intermediate piece (16). Output motor shaft (15) is stored in a bearing (17) which is attached to the motor frame (12).

The motor frame (12) is fixed in the main frame (13) with 4 soft cylindrical rubber dampers (6).

Output motor shaft (15) drives the flexible coupling (9). The flexible element (not shown) inside coupling (9) is connected to output drive shaft (18). The pulley (19) is attached to the output drive shaft (18) so that it rotates together with it.

Output drive shaft (18) is attached to the frame (21) through bearings (20). The frame (21) is attached to the main frame (13) with 4 relatively stiff rubber dampers (7).

A pulley (22) is mounted on the propeller shaft (4). The pulley (22) can rotate freely on the shaft (4), but cannot be moved axially. A toothed belt (8) connects the output drive shaft (18) and pulley (19) with pulley (22).

The coupling (23) is attached to the propeller shaft (4) so that the two rotate together. The propeller shaft (4) can therefore rotate freely without the pulley (22) rotating.

The coupling (23) can be activated, mechanically or in some other way, so that the pulley (22) rotates together with the propeller shaft (4).

If you want to use the electric motor to propel the boat, put the diesel or petrol engine in neutral and switch it off.

The clutch (23) is activated so that the pulley (22) rotates together with the propeller shaft (4).

The battery is connected to the motor controller (not shown) by means of a switch. The power supply regulator (not shown) is activated and power is supplied to the electric motor through the wires (11). The speed of the electric motor is regulated using the power supply regulator.

Reverse is selected using a rotary switch on the engine control.

The boat that was used for testing the prototype weighs approx. 1200 kg. With a power consumption of 1500 W, the speed was measured at approx. 4 knots.

Patent claims

1. Electric battery-powered motor and driveline for propulsion of smaller boats in the speed range 3 to 6 knots, characterized in that the electric motor (5) is of the "nav motor" type with a stationary, non-rotating shaft.

2. Electric battery-powered motor and driveline according to claim 1, characterized in that the motor has a speed in the range of 600 - 900 revolutions/min.

3. Electric battery-powered motor and driveline according to claims 1 - 2, characterized in that the electric motor (5) is designed and built so that it resists splashes of salty and dusty water.

4. Electric battery-powered motor and driveline according to claims 1 - 3, characterized in that the motor (5) is inserted into a frame (12) which is mounted on soft rubber dampers (6) and where the frame is independent of the frame (21) which contains the transmission to the propeller shaft (19), (8) and (22).

5. Electric battery-powered motor and drive line according to claims 1 - 4, characterized in that the output motor shaft (15) and output drive shaft (18) are permanently connected together through a flexible coupling (9).

6. Electric battery-powered motor and drive line according to claims 1 - 5, characterized in that the on and off connection of the drive unit (23) is mounted on the propeller shaft.