JPH07323894A - Outboard motor - Google Patents

Abstract

PURPOSE:To eliminate a projecting object such as piping exposed to the outside and to provide sufficient water sucking ability even in sailing in a shoal by opening a water sucking port in a hull bottom part, and connecting the water sucking port, and a water pump together by means of a flexible hose. CONSTITUTION:In a water suction nozzle 15 arranged in a bottom plate 50b of a hull 50, a water suction port 15a is opened forward, while a plug 16 below a stem plate 50a and the water suction nozzle 15 are connected together via a pipe 17 inside the hull 50. The plug 16 and a water pump 18 arranged inside an outboard motor 1 are connected together via a flexible hose 19. The water pump 18 is driven by a part of the power of an engine 4, and cooling water is sucked from the water port 15a in the water suction nozzle 15. In this case, the water suction port 15a is opened to the bottom face of the hull 50, so that a required amount of cooling water can be sucked from the water port, 15a even when a ship sails in a shoal. As connection is accomplished by the flexible hose 19, no projecting object such as piping is exposed to the outside of the outboard motor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor for cooling an engine with cooling water sucked by a water pump.

[0002]

2. Description of the Related Art As shown in FIG. 3A, in an outboard motor 101 attached to a rear end of a hull 150, a plurality of water intake ports 120 are formed on both side surfaces of a lower case 105. An engine (not shown) is cooled by cooling water such as seawater sucked from the water inlet 120 by a water pump (not shown).

By the way, the water inlet 120 is shown in FIG.
Even if the outboard motor 101 is high-mounted as shown in (b), or if the outboard motor 101 is kept in a high trim state as shown in FIG. It is provided at the position where it can be obtained.

In recent years, however, fishing in shallow water (shallow fishing) has increased, and along with this, outboard motors for shallow fishing have begun to appear. Since this type of outboard motor is used by being mounted high in shallow water, a water intake port 120 is provided below the torpedo 121 as shown in FIG. 4 in order to ensure a sufficient water absorption capacity. In FIG. 4, 107 is a drive shaft that is rotationally driven by an engine (not shown), and 118 is the output shaft 1.
It is a water pump driven by 07.

[0005]

However, since the torpedo 121 has gears and the like (not shown) built therein,
If the water inlet 120 is provided below the torpedo 121 as described above, it is necessary to avoid the torpedo 121 from the water inlet 120 to the water pump 118, and this pipe is exposed to the outside of the lower case 105. There are problems such as water plants getting entangled in the pipe when sailing in shallow water.

The present invention has been made in view of the above problems, and its object is to prevent the projections such as pipes from being exposed to the outside and to provide sufficient water absorption capability even when the boat is sailing in shallow water. To provide an outboard motor capable of securing

[0007]

In order to achieve the above object, the present invention is an outboard motor that incorporates an engine, a water pump, and the like, and cools the engine with the cooling water sucked from the water inlet by the water pump. The water suction port is opened at the bottom of the hull, and the water suction port and the water pump are connected by a flexible hose.

[0008]

According to the present invention, since the water intake opening at the bottom of the hull and the water pump built into the outboard motor are connected by the flexible hose, the projection of piping or the like on the outside of the outboard motor as in the prior art. No matter is exposed, and problems such as entanglement of aquatic plants with the protrusions do not occur. Even if the outboard motor rotates about the fulcrum by the trim operation, the flexible hose bends, so that the trim operation of the outboard motor is not hindered.

Further, since the water intake port opens at the bottom of the hull, a sufficient amount of cooling water is sucked from the water intake port even when the boat sails in shallow water, so that the outboard motor has a sufficient water absorption capacity. Is secured. Then, the cooling water sucked by the water pump is supplied to the engine through the flexible hose to be used for cooling the engine, so that the outboard motor has a high cooling capacity.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an outboard motor 1 according to a first embodiment of the present invention.
2 is a cross-sectional view showing the main configuration of the outboard motor 1 attached to the stern plate 50a of the hull 50 by the clamp bracket 2, and the engine 4 is housed in the housing 3 above the outboard motor 1. ing. A propulsion device 6 is housed in the lower case 5 below the outboard motor 1. The propulsion device 6 is driven by a drive shaft 7 extending downward from the engine 4 to drive the propeller 8 to a required extent. Generate propulsion. That is, the propulsion device 6 includes an input shaft 9 connected to the drive shaft 7, a horizontal bevel gear 10 connected to the lower end of the input shaft 9, and a pair of front and rear vertical bevel gears 11 and 12 meshing with the horizontal bevel gear 10. And the vertical bevel gears 11, 1
2, a propeller shaft 13 that rotatably supports the propeller 2, the propeller 8 connected to the rear end of the propeller shaft 13, and the vertical bevel gear 11 or 12 slidably fitted to the propeller shaft 13. Slider 1 for selectively engaging with
4 is included. When the engine 5 is driven and the drive shaft 7 is rotationally driven, the rotation of the drive shaft 7 is transmitted to the vertical bevel gears 11 and 12 via the input shaft 9 and the horizontal bevel gear 10, and the vertical bevel gears 11 and 12 are transmitted. 1
2 are rotationally driven in opposite directions. When the slider 14 is engaged with the vertical bevel gear 11 or 12 by the shift operation, the rotation of the vertical bevel gear 11 or 12 is transmitted to the propeller shaft 13 via the slider 14,
The propeller 8 connected to the propeller shaft 13 rotates normally or reversely to obtain a required propulsion force.

By the way, in this embodiment, an L-shaped water supply nozzle 15 is attached to the bottom plate 50b of the hull 50, and the water supply nozzle 15 has its water intake port 15a at the front side (left side in FIG. 1). It opens towards. A plug 16 is attached to the lower portion of the stern plate 50a of the hull 50, and the plug 16 and the water absorbing nozzle 15 are connected by a pipe 17 provided in the hull 50. And
A portion of the plug 16 projecting outside the hull 50 and a water pump 18 provided in the outboard motor 1 are connected by a flexible hose 19, and a part of the flexible hose 19 is as shown in the drawing. It is bent in an inverted U shape.

The water pump 18 is arranged near the lower portion of the drive shaft 7 and is driven by the drive shaft 7.

When the engine 4 is driven, the water pump 18 is driven by a part of the power of the engine 4, and the cooling water such as seawater is sucked from the water suction port 15a of the water suction nozzle 15, but the water suction port Since 15a is opened on the bottom surface of the hull 50, a necessary and sufficient amount of cooling water is sucked from the water inlet 15a even when the boat travels in a shallow water, and the outboard motor 1 has a sufficient absorption capacity. Is secured. Since a sufficient amount of cooling water sucked by the water pump 18 is supplied to the engine 4 through a cooling passage (not shown) to cool the engine 4, the outboard motor 1 has a high cooling capacity. As a result, the engine 4 can sufficiently exhibit the required performance.

Further, according to the present embodiment, since the water suction nozzle 15 and the water pump 18 are connected by the pipe 17 and the flexible hose 19, the projection of the pipe or the like on the outside of the outboard motor 1 as in the conventional case. No matter is exposed, and problems such as entanglement of aquatic plants with the protrusions do not occur. Even when the outboard motor 1 rotates about the support shaft 20 by the trim operation, the flexible hose 19 bent in the inverted U shape as described above bends, and thus the outboard motor 1 Does not interfere with the trim operation.

Further, in the present embodiment, since the flexible hose 19 is bent upward, the flexible hose 19 does not become a resistance when traveling while trimming down.

Next, a second embodiment of the present invention will be described with reference to FIG. 2 is a sectional view showing the main structure of the outboard motor 1 according to the second embodiment of the present invention. In this figure, the same elements as those shown in FIG. , And the description thereof will be omitted.

In this embodiment, a water pump 18 is arranged in the upper part of the outboard motor 1, and one end of the flexible hose 1 is connected to a water absorption nozzle 15 attached to a bottom plate 50b of the hull 50.
9 is extended through the inside of the hull 50, and the other end is connected to the water pump 18.

Thus, according to this embodiment, the water pump 18
Since the cooling water sucked from the water suction port 15a of the water suction nozzle 15 is supplied to the engine 4 through the flexible hose 19 and a cooling passage (not shown), the same effect as the first embodiment can be obtained. By arranging the flexible hose 19 in the vicinity of the support shaft 20 as in the present embodiment and surrounding it, the flexible hose 19 does not have to be bent in an inverted U shape as in the first embodiment. There is no problem in trimming or tilting the outboard motor 1.

[0020]

As is apparent from the above description, according to the present invention, an outboard motor having an engine, a water pump, etc. built therein and cooling the engine with the cooling water sucked from the water intake port by the water pump. In the above, since the water inlet is opened at the bottom of the hull and the water inlet and the water pump are connected by a flexible hose, projections such as pipes are not exposed outside the outboard motor, and the shallow water of the boat is not exposed. The effect of being able to secure a sufficient water absorption capacity for the outboard motor even when sailing at.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main configuration of an outboard motor according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main configuration of an outboard motor according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a water intake port position of a conventional outboard motor.

FIG. 4 is an explanatory diagram showing a water intake position of a conventional outboard motor.

[Explanation of symbols]

 1 Outboard Motor 4 Engine 15 Water Absorption Nozzle 15a Water Intake 18 Water Pump 19 Flexible Hose 50 Hull 50a Bottom Plate of Hull

Claims (1)

[Claims] 1. An outboard motor having a built-in engine, a water pump, etc. and cooling the engine with cooling water sucked from the water suction port by the water pump, wherein the water suction port is opened at the bottom of the hull. An outboard motor, wherein the water pump and the water pump are connected by a flexible hose.