KR20240106472A - Motorboat and its motor boat tube - Google Patents

Abstract

The present invention provides a tube for a motor boat, which comprises: a tube unit coupled to left and right sides of a hull and extending in a stern direction from a bow; and a buoyancy member disposed in close contact with the inside of the tube unit, wherein the buoyancy member is filled with urethane foam inside a waterproof vinyl unit providing an accommodation space.

Description

Motorboat and its motor boat tube}

The present invention relates to a motor boat, and particularly to a motor boat with improved safety through tube installation and a tube having a dual structure to maximize buoyancy performance.

A motorboat is a small vessel that has a propeller installed on the lower part of the stern of the hull and is propelled by rotating the propeller using an internal combustion engine. These motorboats differ depending on size, propulsion engine, speed, equipment, purpose, etc., but because the emphasis is usually on speed, various boats are adopted that take water resistance into account.

Motorboats are generally equipped with rubber tubes for buoyancy. The rubber tube is filled with air of about 2 atmospheres inside, which maintains the balance and buoyancy of the hull. Examples of an air-filled tube being installed on a motorboat are disclosed in Registered Utility Model No. 20-0449226 (Prior Art 1) and Registered Patent No. 10-0479928 (Prior Art 2). Looking at these prior arts, the tube is installed on the upper part of the hull. The configuration installed according to is disclosed.

However, when a tube is mounted on the upper part of the hull as in the prior art, the hull itself sinks into the water up to the part where the tube is submerged in the water, so there is a problem that it is difficult to gain speed when moving due to the resistance of the hull in contact with the water.

Also, for the safety of the motorboat, the entire tube is formed with double walls. In most of these structures, the outer wall is made of rubber, the inner wall is made of foamed resin, and the outer and inner walls are bonded with adhesive. Although a double-wall structure is adopted for safety, the outer wall is still made of rubber that is easily damaged by sharp objects, etc., and since the inner wall is attached directly to the inside of the rubber, the inner wall can be damaged along with the outer wall.

And in the conventional tube, an air layer is formed throughout the interior. Due to this air layer, a structure in which the tube is divided into multiple compartments is used. This is for safety. This is to maintain buoyancy in the remaining compartments even if one compartment is damaged. However, a process must be added to divide the inside of the tube into multiple compartments. The manufacturing process cannot be reduced, and cost reduction cannot be expected.

And most ships, such as motorboats, have their engines located at the rear of the hull. Even if the ship is damaged, if the engine is not flooded, it can travel a certain distance and rescue is easier. However, most ships do not have any structures in place to prevent engine flooding. It relies entirely on the normal buoyancy of the ship itself.

Therefore, it is necessary to ensure that the stern where the engine is located has sufficient buoyancy to suppress engine flooding as much as possible even in the worst case where the hull is damaged.

The purpose of the present invention is to provide a tube for a motorboat that maximizes the buoyancy of the hull.

Another object of the present invention is to provide a motorboat that can be easily manufactured while maintaining buoyancy for a long time without sinking even if part of the hull is damaged.

The present invention for achieving this purpose includes a tube portion that is coupled to the left and right sides of the hull and extends from the bow to the stern; and a buoyancy member disposed in close contact within the tube portion, wherein the buoyancy member is entirely filled with foamed urethane in a waterproof vinyl portion providing an accommodation space.

The buoyancy member includes a first buoyancy member mounted on the left and right stern sides of the hull and having the same diameter in the longitudinal direction; And it is preferable to include a second buoyancy member formed so that the diameter becomes smaller as it goes from one end of the first buoyancy member toward the bow side.

The tube portion is in contact with the hull and includes a first lower tube; and a second upper tube coupled to the first lower tube in a vertical direction. When the buoyancy member is seated on the first lower tube, the second upper tube is preferably coupled to the first lower tube.

It is preferable that protrusions of a predetermined shape are formed on the inner surface of the tube portion and are in contact with the outer peripheral surface of the buoyancy member.

It is preferable that the surface of the protrusion is in a hardened state by subjecting the fiber-reinforced composite material to a laminated surface treatment at least once.

It is a motor boat equipped with a hull submerged at sea level, a deck provided on an upper part of the hull, and an engine unit provided at the stern of the hull, and the motor boat tube according to any one of claims 1 to 5 is provided on the hull. It provides a motorboat that is formed entirely along the top of the hull and extends further from the stern of the hull to the rear of the hull.

According to the present invention as described above, a first tube and a second tube having different structures are mounted in the longitudinal direction of the motorboat hull. That is, the first tube provided on the stern side is formed with an air tank for buoyancy and foamed urethane on the outside of the air tank, and the second tube provided on the bow side is formed only with foamed urethane.

These structures can be manufactured more quickly and easily than traditional tube structures that form multiple compartments. And because the air tank is filled with compressed air (or air), it can function as another tube, and is not directly exposed to the external environment (sunlight, sharp objects, etc.), preventing leakage of compressed air or damage to the air tank. You can prevent it from happening.

According to the present invention, a first tube formed with an air tank and urethane foam is installed on the outer surface of the hull adjacent to the engine part. Therefore, even if part of the hull is damaged, the engine part is not completely submerged in the water, so it is possible to operate to a certain extent.

According to the present invention, since the second tube has a relatively smaller diameter than the first tube, resistance can be minimized when the motorboat runs, and it can have a sleek shape like the bow of the motorboat, giving it an aesthetic feel.

According to the present invention, at least two mounting housings are installed on the outer surface of the hull, and the tube is inserted and mounted into the receiving portion of the mounting housing to form the inside of the hull, which also has the effect of allowing the tube to be easily installed in the hull.

1 is a perspective view of a motorboat according to one embodiment.
Figure 2 is a cross-sectional view of Figure 1 viewed from the front.
Figure 3 is a view showing a state in which a buoyancy member is accommodated in a tube portion according to an embodiment.
Figure 4 is a cross-sectional view of a motorboat according to another embodiment viewed from the front.
Figure 5 is a view showing a state in which a buoyancy member is accommodated in a tube portion according to another embodiment.

Like reference numerals refer to substantially the same elements throughout the specification. In the following description, detailed descriptions of configurations and functions that are not related to the core configuration of the present invention and are known in the technical field of the present invention may be omitted. The meaning of terms described in this specification should be understood as follows.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present invention.

“X-axis direction,” “Y-axis direction,” and “Z-axis direction” should not be interpreted as only geometrical relationships in which the relationship between each other is vertical, and should be interpreted within a wider range within which the configuration of the present invention can function functionally. It can mean having direction.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

Each feature of the various embodiments of the present invention can be combined or combined with each other partially or entirely, and various technical interconnections and operations are possible, and each embodiment can be implemented independently of each other or together in a related relationship. It may be possible.

FIG. 1 is a perspective view of a motor boat according to an embodiment, FIG. 2 is a cross-sectional view looking at FIG. 1 from the front, and FIG. 3 is a view showing a state in which a buoyancy member is accommodated in a tube portion according to an embodiment. Figure 4 is a cross-sectional view of a motor boat according to another embodiment viewed from the front, and Figure 5 is a view showing a state in which a buoyancy member is accommodated in a tube portion according to another embodiment. Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings.

As shown in the drawing, the motorboat 100 includes a hull 110 partially submerged in the sea level, a deck 120 provided on the upper part of the hull 110, and an engine unit 10 on the stern side. . The hull 110 is mostly formed as a streamlined body, forming the bottom of the motorboat 100, and is a part partially submerged in the sea level. The hull 110 is completed by laminating, applying, and curing reinforced plastic using a water drop method. The reason for molding with reinforced plastic like this is because reinforced plastic has good molding workability, has a specific gravity of about 1/4 that of iron, is light, has a high strength-to-weight ratio, and has excellent corrosion resistance and durability.

According to the present invention, a tube for a motorboat is installed in the hull 110. The tube may be formed all along the top of the hull. The tube is coupled to the upper left and right sides of the hull 110 in a symmetrical shape, and may extend long from the bow of the hull 110 to the stern where the engine unit 10 is located. It is preferable that one end of the tube extends further to the rear of the hull, longer than the stern. This is to prevent the engine unit 10 from being flooded as much as possible even if the hull 110 is damaged. Additionally, this is to prevent the stern from being excessively submerged below the water when the hull 100 rapidly accelerates.

In another embodiment, the tube may be installed on the side rather than the top of the hull 110. At this time, it is preferable that the tube is coupled to the side, especially the upper side. Through this, the buoyancy of the hull 110 can be better maintained and the hull 110 can be more effectively prevented from capsizing by waves. The tube may include a tube portion 300 and a buoyancy member 200 disposed in close contact therein.

The tube portion 300 is formed on the outer surface of the hull 110 and is formed in a shape corresponding to the exterior of the buoyancy member so that the buoyancy member 200 can be accommodated. The tube portion includes a first lower tube 302 in contact with the hull 110, a second upper tube 304 coupled to the first lower tube 302 in the vertical direction, and an upper tube extending upward from the top of the second upper tube 304. Includes a handrail 306.

Here, the tube portion 300 is preferably made of glass fiber (FRP) material. Since the glass fiber has chemical durability, it is not easily corroded by ultraviolet rays, etc., and has a strong tensile strength, effectively preventing water from penetrating.

The tube portion 300 is formed in a shape that can accommodate the buoyancy member 200 while surrounding it. A portion of the outer peripheral surface of the tube portion 300 may be in contact with the top of the hull 110. The first lower tube 302 may be formed at the top of the hull 110. During the manufacturing process of a motor boat, in order to accommodate the buoyancy member 200 in the tube portion 300, the worker first seats the buoyancy member 200 on the first lower tube 302 and then places the buoyancy member 200 on the second upper tube 304. It can be combined in a way that covers the . At this time, additional fastening members such as bolts may be used at the joint portion between the first lower tube 302 and the second upper tube 304. For example, when a bolt, etc. is inserted from the outside of the second upper tube 304, a coupling groove, etc. may be formed on the inside of the first lower tube 302 so that a nut, etc. can be seated.

In another embodiment, a protrusion 308 of a predetermined shape may be formed on the inner surface of the tube portion 300. The protrusion 308 serves to prevent the outer peripheral surface of the buoyancy member 200 from directly contacting the inner surface of the tube portion 300. When the buoyancy member 200 is accommodated in complete contact with the tube portion 300, condensation may occur between the outer surface of the buoyancy member 200 and the inner surface of the tube portion 300 due to the difference in internal and external temperatures. Because. As a result, the protrusion 308 allows the buoyancy member 200 to be spaced a certain distance from the inner surface of the tube portion 300 when the buoyancy member 200 is accommodated in the tube portion 300.

The protrusion 308 has a certain degree of strength that allows it to maintain its original shape even when an external load is applied. The protrusion 308 has a C-shaped, D-shaped, etc. shape and is made of synthetic fiber or glass fiber. A plurality of protrusions 308 are distributed and disposed on the inner surface of the receiving portion. In order to maintain the shape, the surface of the protrusions 308 is maintained in a hardened state by laminating and surface treating the fiber-reinforced composite material at least once. As a result, the protrusion 308 has a solid shape.

Additionally, the protrusions 308 can be formed by repeating this process multiple times. That is, after the protrusions 308 are placed and laminated and surface treated (completed once), the protrusions 308 are placed on top of the protrusions 308 again, and then laminated and surface treated again (completed twice). Increased rigidity can be secured. This process can be performed multiple times.

The buoyancy member 200 has a thicker diameter as it moves from the bow to the stern. For convenience of explanation, the stern side area is called the 'first buoyancy member 202' and the bow side area is called the 'second buoyancy member 204'. The first buoyancy member 202 is mounted on the left and right stern sides of the hull. The second buoyancy member is formed to have a smaller diameter as it moves from one end of the first buoyancy member toward the bow side.

The first buoyancy member 202 and the second buoyancy member 204 may be formed integrally, or may be formed by combining pre-manufactured first and second buoyancy members 204 through a series of methods. For example, the first buoyancy member 202 and the second buoyancy member 204 may be manufactured separately and then combined based on the coupling surface (P). The buoyancy member 200 may be manufactured by selecting an appropriate method depending on the convenience of the manufacturing process.

The length or area occupied by the first buoyancy member 202 and the second buoyancy member 204 in the entire length of the buoyancy member 200 may vary depending on the design. It may vary depending on the shape of the hull on which the buoyancy member 200 is mounted. For example, the first buoyancy member 202 may be longer or shorter than the second buoyancy member 204. In addition, the diameter of the second buoyancy member 204 is formed to become narrower overall toward the bow side, and the diameter of the first buoyancy member 202 is formed to be the same. The buoyancy member of this configuration can be designed in various ways within a range where the balance and buoyancy of the hull 110 can be optimally maintained. The internal structure of the buoyancy member 200 will be examined again below.

In one embodiment, the buoyancy member 200 may be manufactured with the foamed urethane 210 completely filled inside the waterproof vinyl portion (vm). The waterproof vinyl part (vm) is formed using vinyl fabric with a certain thickness to provide an internal accommodation space. The vinyl fabric may be, for example, polyvinyl chloride. When the foamed resin liquid is sprayed into the space using a foamed liquid spray device (not shown), the injected foamed resin liquid expands and hardens, and the inside of the waterproof vinyl part is filled with solidified foamed urethane. Through this curing process, the urethane foam 210 can be in close contact with the inner surface of the waterproof vinyl part (vm).

In the buoyancy member 200 for a motor boat, the diameter (ℓ) of the first buoyancy member (202) is formed to be larger than the diameter (ℓ1) of the second buoyancy member (204). The second buoyancy member 204 is installed on the bow side of the hull 110, and its diameter is formed to become smaller as it goes toward the bow of the hull 110. This is to minimize air resistance when driving the motorboat 100 and also provide aesthetics for the overall appearance of the motorboat 100.

That is, the outer shell forming the exterior of the buoyancy member 200 is made of vinyl fabric, and its interior is completely filled with foamed urethane 240. In one embodiment, the first buoyancy member and the second buoyancy member are entirely filled with expanded urethane 210.

According to the present invention, the waterproof vinyl portion (vm) has the feature of effectively preventing water from penetrating. In addition, the foaming resin liquid is cured after a predetermined time elapses after the polymer foaming resin, such as polyurethane foam or polypropylene foam, is sprayed into the waterproof vinyl part (vm) and is molded into foamed urethane 210. When this foaming resin liquid is molded, foaming gas such as carbon dioxide is generated and a foam layer is formed to form a foaming agent. Since it is generally made from petroleum-based materials as a raw material, it does not absorb water.

Meanwhile, in another embodiment, an air tank (not shown) may be formed inside the first buoyancy member 202 so that the stern side of the hull 110 on which the engine unit 10 is installed can sufficiently maintain buoyancy. At this time, the first buoyancy member 202 may include an outer shell forming an outer shape, and an inner shell 230 forming an air tank 220 at the center in the longitudinal direction. At this time, the inner skin and outer skin may be formed of vinyl fabric. The inner skin 230 and the outer skin are spaced apart at a certain interval. And, the space between the spaced spaces is a space filled with foamed urethane (210).

In this way, the first buoyancy member 202 is made with an air tank formed in the center and the outside of the air tank filled with foamed urethane 210. And the buoyancy member is in a sealed state, and the buoyancy can be further improved by the compressed air (or air) injected into the air tank. This may mean that the stern portion of the hull 110 on which the engine unit 10 is mounted can be prevented from being quickly flooded when the hull 110 is damaged.

As a result, the first buoyancy member 202 forms a main body including the outer shell of the buoyancy member 200 and the inner shell forming the air tank, and the main body is formed by combining donut-shaped plates at both ends. In contrast, the interior of the second buoyancy member 204 is completely filled with foamed urethane 240. Compared to the first tube 202, no air tank is formed inside.

As a result, in another embodiment, the stern side of the buoyancy member 200 is formed of an air tank and foamed urethane 210, and the bow side is formed only of foamed urethane 240, so the stern on which the engine unit 10 is mounted The buoyancy performance of the side can be relatively improved. In addition, since one air tank is formed inside the first tube in the longitudinal direction, it can be manufactured more easily than by dividing the inside of the tube into a plurality of compartments.

Meanwhile, in the above-described embodiment, it was explained that one tube is installed along the left and right sides of the hull 110. However, depending on the size of the hull 110, etc., it is also possible to form a plurality of tube parts 300 so that two or more buoyancy members 200 can be installed in the vertical direction of the hull 110. And the tube parts 300 arranged in the vertical direction may contact or be spaced apart from each other.

As described above, the present invention is described with reference to the illustrated embodiments, but these are merely illustrative examples, and those of ordinary skill in the art to which the present invention pertains can make various modifications without departing from the gist and scope of the present invention. It will be apparent that variations, modifications, and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

100: motorboat
110: hull
120: deck
200: Buoyancy member
202: First buoyancy member
204: Second buoyancy member
210: Foamed urethane
300: Tube part
302: First lower tube part
304: Second upper tube part
306: Handrail
308: protrusion
10: Engine part
vm: waterproof vinyl part
c: fastening member

Claims (6)

A tube portion coupled to the left and right sides of the hull and extending from the bow to the stern; and
It includes a buoyancy member disposed in close contact within the tube portion,
The buoyancy member is a tube for a motor boat, characterized in that the interior of the waterproof vinyl portion providing the accommodation space is entirely filled with foamed urethane.
According to claim 1,
The buoyancy member includes a first buoyancy member mounted on the left and right stern sides of the hull and having the same diameter in the longitudinal direction; and
A tube for a motor boat including a second buoyancy member whose diameter is formed to decrease from one end of the first buoyancy member toward the bow side.
According to claim 1,
The tube portion is in contact with the hull and includes a first lower tube; and
It includes a second upper tube coupled to the first lower tube in the vertical direction,
A tube for a motor boat to which the second upper tube is coupled when the buoyancy member is seated on the first lower tube.
According to claim 3,
A motor boat tube in which a protrusion of a predetermined shape is formed on the inner surface of the tube portion and is in contact with the outer peripheral surface of the buoyancy member.
According to claim 4,
A motor boat tube in which the surface of the protrusion is cured by laminating the fiber-reinforced composite material at least once.
It is a motor boat equipped with a hull submerged at sea level, a deck provided on the upper part of the hull, and an engine unit provided at the stern of the hull,
A motorboat, characterized in that the motorboat tube according to any one of claims 1 to 5 is formed entirely along the top of the hull, and extends further from the stern of the hull to the rear of the hull.

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