JP2006182222A - Top cowl of outboard motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a top cowl of an outboard motor improved in the rigidity of an open air intake opening part, and capable of securing fitness feeling when hooking, and further capable of preventing the top cowl from resonance. <P>SOLUTION: The top cowl 71 of the outboard motor 1 is opened in a bottom part 71a to house an engine 10 from an opening part 71b, and has an open air intake opening part 90 for sucking open air. Block parts 60 are fitted along an upper opening edge 90b of the open air intake opening part 90. The upper opening edge 90b of the open air intake opening part 90 is bent inside to support an end 60a of the block part 60 with the bent part 90b1, and the end 60a of the block part 60 has a round shape continued to the bent part 90b1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a top cowling of an outboard motor having an opening for taking in outside air.

  Conventionally, in an outboard motor mounted on a small boat, the engine of the propulsion unit is covered with a top cowl and a bottom cowl.

Some of the top cowls have an opening for taking in outside air that has an opening at the bottom, accommodates the engine from the opening, and sucks outside air. The outside air intake opening is used as a handle to be put on when the outboard motor is tilted (for example, Patent Documents 1 and 2).
JP 2001-191987 (first to eighth pages, FIGS. 1 to 10) JP 2003-89391 A (first to ninth pages, FIGS. 1 to 14)

  Thus, when the hand is put on the opening for taking in outside air, the top cowl is formed with a thin wall, so that the touch is bad. In addition, the top cowl is formed with a thin wall, and if the opening for taking in outside air is increased in order to increase the amount of intake air, the rigidity of the opening edge is lowered and resonance occurs due to engine vibration. .

  The present invention has been made in view of the above points, and provides a top cowling for an outboard motor capable of increasing the rigidity of an opening for taking in outside air, ensuring a fit when handled, and preventing resonance. It is intended to provide.

  In order to solve the above problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a top cowl of an outboard motor having an opening for taking in outside air that has an opening at the bottom, accommodates an engine from the opening, and sucks outside air.
A top cowl of an outboard motor, wherein block parts are attached along an upper opening edge of the outside air intake opening.

In the invention according to claim 2, the upper opening edge of the outside air intake opening is bent inward, and the end of the block component is supported by the bent portion.
2. The outboard motor top cowl according to claim 1, wherein an end portion of the block component has an R shape that is continuous with the bent portion.

The invention according to claim 3 includes a molding having an intake air duct for sucking outside air into the engine room,
The outboard motor top cowl according to claim 1 or 2, wherein the block part is formed integrally with the molding.

  The invention according to claim 4 is the top cowl of the outboard motor according to any one of claims 1 to 3, wherein the top cowl is formed of a non-ferrous metal material.

  With the above configuration, the present invention has the following effects.

  According to the first aspect of the present invention, the rigidity of the outside air intake opening can be increased by attaching the block component along the upper opening edge of the outside air intake opening. In addition, the block portion can ensure a fit when handled, and can further prevent the outside air intake opening from resonating due to engine vibration.

  According to the second aspect of the present invention, the upper opening edge of the outside air intake opening is bent inward, and the end of the block component is supported by the bent portion, and the end of the block component is continuous with the bent portion. It has an R shape, and the block portion can secure a fit when handled, and the intake resistance can be suppressed by smoothing the flow of intake air.

  According to the third aspect of the present invention, since the block part is formed integrally with the molding, the block part and the molding can be assembled at the same time, and the assembling work can be simplified.

  According to the fourth aspect of the present invention, the top cowl is molded using a non-ferrous metal material, and is lightweight and rigid.

  Hereinafter, although the embodiment of the top cowl of the outboard motor of the present invention will be described, the present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  First, the overall configuration of the outboard motor will be outlined with reference to FIG. FIG. 1 is a side view of the outboard motor.

  The outboard motor 1 is attached to the stern plate 3 a of the hull 3 by a clamp bracket 2. A swivel bracket 6 that elastically supports the propulsion unit 5 by upper and lower mount members 4 a and 4 b is attached to the clamp bracket 2 by a tilt shaft 20. It is pivotally attached to it.

  The propulsion unit 5 has a housing composed of a cowl 7, an upper case 8 and a lower case 9, and a 4-cycle engine 10 is accommodated in the cowl 7. The upper case 8 is attached to the lower part of the exhaust guide 11. The engine 10 is supported by an exhaust guide 11.

  A crankshaft 12 is disposed in the engine 10 in the vertical direction, and the crankshaft 12 is connected to an upper end of a drive shaft 13 that vertically cuts through the upper case 8. The lower end of the drive shaft 13 is connected to a forward / reverse switching mechanism 14 housed in the lower case 9, and a propeller shaft 15 extends in the horizontal direction from the forward / backward switching mechanism 14, and the propeller shaft 15 is outside the lower case 9. A propeller 16 is attached to the rear end protruding to the rear.

  The cowling 7 includes a bottom cowl 70 and a top cowl 71. The top cowl 71 has an outside air intake opening 90, and air sucked from the outside air intake opening 90 is sucked into the engine room 93 through the intake air duct 92 of the molding 91.

  The top cowl 71 is formed as shown in FIGS. FIG. 2 is a diagram showing a top cowl outside air intake opening in a broken view, FIG. 3 is a diagram showing an outside air intake opening in the top cowl, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  The top cowl 71 of this embodiment is formed of a non-ferrous metal material, the bottom 71a is opened, and the engine 10 is accommodated from the opening 71b. The top cowl 71 is formed by die casting, pressing, or the like using a light non-ferrous metal material with good heat dissipation such as aluminum, aluminum alloy, or magnesium.

  An end 91a of the molding 91 is attached to the outside air intake opening 90 for sucking outside air along the lower opening edge 90a with an adhesive. The lower opening edge 90a and the end 91a of the molding 91 have a continuous shape, and the intake resistance can be suppressed by smoothing the flow of intake air.

  The block component 60 is attached to the outside air intake opening 90 with an adhesive along the upper opening edge 90b. The block component 60 is formed of resin or rubber.

  The outside air intake opening 90 bends the upper opening edge 90b inward, and supports the end 60a of the block component 60 by the bent part 90b1. The end portion 60a of the block component 60 has an R shape that is continuous with the bent portion 90b1.

  Thus, by forming the top cowl 71 with a non-ferrous metal material, the top cowl 71 is formed with a thin wall, but by attaching the block component 60 along the upper opening edge 90b of the outside air intake opening 90b. The rigidity of the outside air intake opening 90 can be increased. Furthermore, it is possible to prevent the outside air intake opening 90 from resonating due to the vibration of the engine 10.

  The outside air intake opening 90 is used as a handle to be put on when the outboard motor 1 is tilted. The upper opening edge 90b of the outside air intake opening 90 is bent inward, and the bent portion is formed. 90b1 and the end portion 60a of the block component 60 have a continuous R shape, and the block portion 60 can ensure a fit when handled.

  Further, the end portion 60a of the block component 60 has an R shape that is continuous with the bent portion 90b1, and the intake resistance can be suppressed by smoothing the flow of intake air.

  Next, another embodiment of the top cowl 71 is shown in FIGS. FIG. 5 is a cutaway view of the opening for taking in outside air of the top cowl, and FIG. 6 is a perspective view formed integrally with a block part and a molding.

  The top cowl 71 of this embodiment includes a molding 91 having an intake air duct 92 that sucks outside air into the engine room 93. The intake air duct 92 is provided by being bonded to a dish-shaped molding 91.

  In this embodiment, the block component 60 and the molding 91 are integrally formed of resin. An opening 61 is formed by the block component 60 and the molding 91, and the assembly to the top cowl 71 is performed by aligning the opening 61 with the outside air intake opening 90, and the end 91 a of the molding 91 is the lower opening of the outside air intake opening 90. The edge 60a is attached along the edge 90a, and the end 60a of the block component 60 is attached along the upper opening edge 90b of the outside air intake opening 90 with an adhesive.

  As described above, the block component 60 and the molding 91 can be assembled to the top cowl 71 at the same time, and the assembling work can be simplified.

  According to the present invention, the rigidity of the outside air intake opening can be increased by attaching the block component along the upper opening edge of the outside air intake opening. In addition, the block portion can ensure a fit when handled, and can further prevent the outside air intake opening from resonating due to engine vibration.

It is a side view of an outboard motor. It is a figure which fractures | ruptures and shows the opening part for external air intake of a top cowl. It is a figure which shows the opening part for external air intake of a top cowl. It is sectional drawing which follows the IV-IV line of FIG. It is a figure which fractures | ruptures and shows the opening part for external air intake of a top cowl. It is the perspective view formed integrally with the block component and the molding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outboard motor 10 Engine 71 Top cowl 71a Bottom part 71b Opening part 60 Block component 90 Opening part for taking in outside air 93 Engine room

Claims (4)

A bottom cowl is an outboard motor top cowl having an opening for taking in outside air.
A top cowling for an outboard motor, wherein a block part is attached along an upper opening edge of the outside air intake opening. The upper opening edge of the opening for taking in outside air is bent inward, and the end of the block component is supported by the bent portion,
The top cowl of an outboard motor according to claim 1, wherein an end portion of the block part has an R shape continuous with the bent portion. Equipped with a molding with an intake air duct that sucks outside air into the engine room,
3. The outboard motor top cowl according to claim 1, wherein the block part is formed integrally with the molding.   The top cowl for an outboard motor according to any one of claims 1 to 3, wherein the top cowl is formed of a non-ferrous metal material.

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