RU2776080C1 - Boat motor (options) - Google Patents

Abstract

FIELD: shipbuilding.

SUBSTANCE: invention relates to the field of shipbuilding, namely to outboard motors. The outboard motor includes an engine, a deadwood connecting the engine to the transmission housing, a drive shaft located in the inner space of the deadwood, a bracket for fixing the motor, a transmission placed on the same axis with the propeller. Around the transmission and the propeller there is a fairing made in the form of a rigid casing with an open rear wall, as well as a cutout under the propeller. The fairing is made with the possibility of its vertical deflection around the horizontal axis of rotation by means of a forced deflection control mechanism.

EFFECT: stabilization of the level of water direction to the propeller at different speeds of the watercraft movement is achieved to increase the efficiency of the motor and reduce the load on the outboard motor.

6 cl, 6 dwg

Description

The invention relates to the field of shipbuilding, namely to outboard boat motors, and can be used in water transport for equipping small-sized light class floating craft with a small displacement for both special and general purposes.

Known outboard motor according to the author's certificate of the USSR No. 1216083, 1986, containing deadwood, transmission shaft. Detachable parts of the deadwood and transmission shaft are made telescopic, and the lower part of this shaft is made with a transverse split for relative movement of its detachable sections. At the bottom of the longitudinal ledges of the outer detachable telescopic part of the deadwood, end locking devices are made. At the top of the grooves of the inner detachable telescopic part of the deadwood, there is an end stepped ledge. One of the split telescopic parts of the transmission shaft has a length less than either of the two split telescopic parts of the deadwood.

The design of this motor allows it to be widely used at shallow depths of a reservoir due to its telescopic detachable parts, and it is also relatively convenient to transport the motor in a folded non-working position.

However, this motor has significant drawbacks - the inability to provide a constant level of water direction to the propeller, depending on the speed and load of the vehicle, wave height, and other factors.

The closest to the proposed invention in terms of technical essence is an outboard motor, according to patent RU 2583991 C1, containing an engine with an output shaft, a sterndrive drive, a sternwood with a drive shaft and a driven shaft installed inside the stern tube and interconnected by a chain drive, placed on driven shaft of the deadwood propeller, clamps for fastening to the transom of the boat, and the deadwood drive is made in the form of a V-belt variator, the drive pulley of which is installed on the output shaft of the engine, and the driven pulley is mounted on the drive shaft of the deadwood.

The disadvantage of this device is also the inability to provide a constant operating level of direction (supply) of water to the propeller, depending on the speed and load of the vehicle, wave height, and other factors.

The main objective of the invention is to eliminate these disadvantages of the closest analogue.

EFFECT: stabilization of the level of water direction to the propeller at different vehicle speeds, to increase the efficiency of the motor and reduce the load on the outboard motor.

This result according to the first embodiment is achieved by the design of the outboard motor, which includes an engine, a deadwood connecting the engine to the transmission housing, a drive shaft located in the inner space of the deadwood, a bracket for fixing the motor, a transmission placed on the same axis with the propeller, while around transmission and propeller there is a fairing made in the form of a rigid casing with an open rear wall, as well as a cutout under the propeller.

Also, this result according to the second embodiment is achieved by the design of the outboard motor, which includes an engine, a deadwood connecting the engine to the transmission housing, a drive shaft located in the inner space of the deadwood, a bracket for fixing the motor, a transmission placed on the same axis as the propeller, while a fairing is placed around the transmission and the propeller, made in the form of a rigid casing with an open rear wall, as well as a cutout under the propeller, while this fairing is made with the possibility of its vertical deflection around the horizontal axis of rotation by means of a forced deflection control mechanism.

The forced deflection control mechanism includes at least one drive cable attached to the fairing body, as well as springs installed inside the fairing and a stroke limiter that limits the movement of the fairing upwards from the horizontal.

The fairing deflection force control mechanism is driven mechanically or hydraulically or pneumatically or electrically.

The fairing is basically made in the form of a rectangular parallelepiped or a cylinder or a cone with a horizontally beveled lower surface.

The fairing includes a vertical partition separating the propeller from the transmission assembly.

Further, the proposed invention will be discussed in detail in view of the illustrations, where in Fig. 1 shows a general view of the outboard motor according to option 1,

in fig. 2 shows a schematic representation of the propeller in the fairing in the first version,

in fig. 3 is a schematic representation of a cone-shaped fairing in the area of the propeller. Bottom view;

in fig. 4 shows a general view of the outboard motor according to option 2,

in fig. 5 schematic representation of a propeller with a turning mechanism (fairing in the raised position),

in fig. 6 is a schematic representation of a propeller with a rotary mechanism (fairing in the lowered position).

Positions on the drawings:

1 - engine

2 - deadwood

3 - bracket

4 - drive shaft

5 - transmission

6 - propeller

7 - fairing

8 - cutout

9 - partition

10 - drive cable

11 - horizontal axis of rotation

12 - spring

13 - stroke limiter

The outboard motor is made, preferably, in the form of an outboard boat motor, including an engine 1. Under the engine 1 is understood a cylinder-piston unit with a fuel supply and ignition system. The motor also includes a deadwood 2, that is, the middle part of the motor that connects the engine 1 with the transmission housing 5 of the outboard motor in one piece.

Bracket 3 serves to fix the motor to the mating element of the vehicle.

The drive shaft 4 of the motor is located in the inner space of the deadwood 2.

Shaft 4 transmits rotation from motor 1 to transmission 5. Transmission 5 is a gearbox, gearbox, variator or other rotation transmission mechanism located on the same axis as propeller 6. Propeller 6 can have a different design and a different number of blades, for example , 3, 5, 7, etc.

In the lower part of the outboard motor, around the transmission 5 and the propeller 6, there is a fairing 7. The fairing 7 is made in the form of a rigid casing with an open rear (next to the propeller 6) wall, in which there is a cutout 8 below under the propeller 6. This cutout 8 ensures unhindered rotation of the propeller 6 and the capture of the necessary (specified) amount of water for the correct operation of the engine with a partially submersible propeller.

According to the second version, this fairing 7 is made with the possibility of its vertical deflection up and down around the horizontal axis 11 of rotation by means of a forced deflection control mechanism. The axis 11 of rotation is, for example, a bushing, a pin, a loop of rotation, or another similar structure that provides rotation of the fairing 7 around the axis 11.

The forced deflection control mechanism includes at least one drive cable 10 attached to the fairing body. It is possible to use two drive cables 10 connected into one closer to the drive unit. The forced control mechanism also includes springs 12 installed inside the fairing 7 and a stroke limiter 13, which limits the movement of the fairing 7 upwards from the horizontal. It is preferable to use two springs 12, which ensures a symmetrical deflection of the fairing 7 on each side, however, there may be a different number, for example 4 pieces. The stroke limiter 13 is made, for example, in the form of a horizontal plate or pipe and provides restriction of the movement of the fairing 7 upwards, above the level from the horizon, since the upper edge of the fairing 7 will rest against this limiter 13, thereby eliminating the incorrect operation of the motor.

The drive of the mechanism for forced control of the deflection of the fairing is mechanical or hydraulic or pneumatic or electric, providing the deflection of the fairing 7 according to the second version of the device.

The fairing 7 is basically made in the form of a rectangular parallelepiped (Fig. 1, 2) or a cylinder or a cone (Fig. 3) with a horizontally beveled lower surface.

Preferably, fairing 7 includes a vertical baffle 9 separating propeller 6 from transmission assembly 5.

The principle of operation of the device is as follows.

The outboard motor is installed on the boat. After starting the outboard motor, the propeller 6 begins to gain momentum and the craft starts moving. At the moment of speed gain, a limited amount of water is supplied to the propeller 6 due to the presence of a fairing 7 and a cutout 8 in it for the propeller 6. Excess water at the moment of launch is quickly ejected, thereby ensuring the water supply at the desired operating level. Further, when gaining speed, the aft part of the craft is loaded and lowered (according to the law of physics), however, at the moment, the fairing 7 also squeezes out and removes excess water from under the propeller 6, keeping at the working level and stabilizing the level of water directed to the propeller 6, for increase the efficiency of the motor and reduce the load on the outboard motor. At the same time, according to option 2, it is possible to additionally adjust the inclination of the fairing 7, thereby further increasing the efficiency of the engine in various modes, for example, tilt the fairing 7 to a certain angle, thereby unloading the propeller 6 even more, which can be useful, for example, with a heavy load watercraft.

The proposed invention provides stabilization of the level of water direction to the propeller at different speeds of the water craft, to increase the efficiency of the motor and reduce the load on the outboard motor.

Claims (6)

1. Outboard motor, characterized in that it includes an engine, a deadwood connecting the engine to the transmission housing, a drive shaft located in the inner space of the deadwood, a bracket for fixing the motor, a transmission placed on the same axis with the propeller, while around the transmission and propeller The propeller has a fairing made in the form of a rigid casing with an open rear wall, as well as a cutout under the propeller. 2. Outboard motor, characterized in that it includes an engine, a deadwood connecting the engine to the transmission housing, a drive shaft located in the inner space of the deadwood, a bracket for fixing the motor, a transmission placed on the same axis with the propeller, while around the transmission and propeller The propeller contains a fairing made in the form of a rigid casing with an open rear wall, as well as a cutout under the propeller, while this fairing is made with the possibility of its vertical deflection around the horizontal axis of rotation by means of a forced deflection control mechanism. 3. The outboard motor according to claim 2, characterized in that the mechanism for forced deflection control includes at least one drive cable attached to the fairing body, as well as springs installed inside the fairing, and a stroke limiter that limits the movement of the fairing upwards from the horizontal. 4. The outboard motor according to claim 3, characterized in that the drive of the mechanism for the forced control of the deflection of the fairing is mechanical, or hydraulic, or pneumatic, or electric. 5. Outboard motor according to claim 1 or 2, characterized in that the fairing is basically made in the form of a rectangular parallelepiped, or a cylinder, or a cone with a horizontally beveled lower surface. 6. Outboard motor according to claim 1 or 2, characterized in that the fairing includes a vertical partition separating the propeller from the transmission assembly.

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